diff --git a/TODO.md b/TODO.md
index 3e92b8f..134dd7b 100644
--- a/TODO.md
+++ b/TODO.md
@@ -74,3 +74,10 @@
 ## Sticky save/cancel buttons on edit page
 - [x] `templates/admin/edit.php` — moved `.admin-form-footer` from bottom to top-right, right after `<h1>`
 - [x] `admin.css` — added `.admin-form-footer--sticky` variant with `position:sticky; top:0; justify-content:flex-end`
+
+## Standardise buttons with .btn base class
+- [x] Create `.btn` base class in common.css: `border-radius: 10px; padding: var(--space-xs)` + background + cursor
+- [x] Add `.btn--primary` (accent bg), `.btn--secondary` (--bg bg + border), `.btn--sm`, `.btn--lg`, `.btn--danger`, `.btn--warning`, `.btn--success`, `.btn--ghost`, `.btn--muted`, `.btn--blue`, `.btn--yellow`, `.btn--green`, `.btn--red` modifiers
+- [x] Replace old button definitions in admin.css, form.css, tfe.css, file-access.css, system.css with empty alias comments
+- [x] Update all PHP templates to use new `.btn` classes (`btn btn--primary`, `btn btn--secondary`, `btn btn--danger`, etc.)
+- [x] Update border-radius on pagination buttons to 10px for consistency
diff --git a/app/public/assets/css/admin.css b/app/public/assets/css/admin.css
index 75fa0cb..860aa65 100644
--- a/app/public/assets/css/admin.css
+++ b/app/public/assets/css/admin.css
@@ -89,68 +89,26 @@
     gap: var(--space-s);
 }
 
-.admin-btn {
-    padding: var(--space-2xs) var(--space-l);
-    background: var(--accent-primary);
-    color: var(--accent-foreground);
-    border: none;
-    border-radius: 3px;
-    font-size: var(--step--1);
-    font-family: inherit;
-    cursor: pointer;
-    letter-spacing: 0.04em;
-    text-decoration: none;
-    display: inline-block;
-    transition: background 0.15s;
-}
+/* ── Admin button aliases — see common.css .btn base class ────────────── */
 
-.admin-btn:hover {
-    background: var(--accent-secondary);
+.admin-btn {
+    /* deprecated alias for .btn--primary; kept for backward-compat */
 }
 
 .admin-btn-secondary {
-    padding: var(--space-3xs) var(--space-m);
-    background: transparent;
-    color: var(--text-tertiary);
-    border: 1px solid var(--border-primary);
-    border-radius: 3px;
-    font-size: var(--step--1);
-    font-family: inherit;
-    cursor: pointer;
-    letter-spacing: 0.04em;
-    text-decoration: none;
-    display: inline-block;
-    transition: all 0.15s;
+    /* deprecated alias for .btn--secondary; kept for backward-compat */
 }
 
-.admin-btn-secondary:hover {
-    border-color: var(--text-secondary);
-    color: var(--text-primary);
-}
-
-/* Small size modifier */
 .admin-btn--sm {
-    padding: var(--space-3xs) var(--space-2xs);
-    font-size: var(--step--2);
+    /* deprecated alias for .btn--sm; kept for backward-compat */
 }
 
-/* Semantic colour modifiers */
 .admin-btn--warning {
-    background: var(--accent-yellow);
-    color: var(--text-primary);
-    border: none;
-}
-.admin-btn--warning:hover {
-    filter: brightness(0.9);
+    /* deprecated alias for .btn--warning; kept for backward-compat */
 }
 
 .admin-btn--danger {
-    background: var(--accent-red);
-    color: var(--accent-foreground);
-    border: none;
-}
-.admin-btn--danger:hover {
-    filter: brightness(0.9);
+    /* deprecated alias for .btn--danger; kept for backward-compat */
 }
 
 /* ── Toast messages (bottom-center, CSS-only auto-fade) ─────────────── */
@@ -319,37 +277,11 @@
 }
 
 .admin-filters-btn {
-    padding: var(--space-3xs) var(--space-s);
-    background: var(--accent-primary);
-    color: var(--accent-foreground);
-    border: none;
-    border-radius: 3px;
-    font-size: var(--step--1);
-    font-family: inherit;
-    cursor: pointer;
-    transition: background 0.15s;
-}
-
-.admin-filters-btn:hover {
-    background: var(--accent-secondary);
+    /* deprecated alias for .btn--primary; kept for backward-compat */
 }
 
 .admin-filters-reset {
-    font-size: var(--step--1);
-    color: var(--text-secondary);
-    background: none;
-    border: 1px solid var(--border-primary);
-    border-radius: 3px;
-    font-family: inherit;
-    padding: var(--space-3xs) var(--space-xs);
-    cursor: pointer;
-    text-decoration: none;
-    transition: border-color 0.15s, color 0.15s;
-}
-
-.admin-filters-reset:hover {
-    border-color: var(--text-secondary);
-    color: var(--text-primary);
+    /* deprecated alias for .btn--secondary; kept for backward-compat */
 }
 
 /* ── Bulk actions bar ───────────────────────────────────────────────────── */
@@ -449,80 +381,40 @@
     color: var(--error);
 }
 
-/* ── Action buttons in table ────────────────────────────────────────────── */
+/* ── Action buttons in table — see common.css .btn base class ──────────── */
 .admin-actions {
     display: flex;
     gap: var(--space-3xs);
     flex-wrap: wrap;
 }
 
+/* Legacy table-action size — now just an alias */
 .admin-btn-sm {
-    padding: var(--space-3xs) var(--space-2xs);
-    min-height: 2rem;
-    border-radius: 3px;
-    font-size: var(--step--2);
-    font-family: inherit;
-    cursor: pointer;
-    text-decoration: none;
-    display: inline-flex;
-    align-items: center;
-    border: 1px solid transparent;
-    transition: all 0.15s;
-    white-space: nowrap;
+    /* deprecated alias for .btn--sm; kept for backward-compat */
 }
 
 .admin-btn-view {
-    background: var(--blue-muted-bg);
-    color: var(--accent-blue);
-    border-color: var(--blue-muted-border);
-}
-.admin-btn-view:hover {
-    background: var(--blue-muted-bg-hover);
+    /* deprecated alias for .btn--sm .btn--blue */
 }
 
 .admin-btn-visit {
-    background: var(--success-muted-bg);
-    color: var(--success);
-    border-color: var(--success-muted-border);
-}
-.admin-btn-visit:hover {
-    background: var(--green-muted-bg-hover);
+    /* deprecated alias for .btn--sm .btn--green */
 }
 
 .admin-btn-edit {
-    background: var(--yellow-muted-bg);
-    color: var(--accent-yellow);
-    border-color: var(--yellow-muted-border);
-}
-.admin-btn-edit:hover {
-    background: var(--yellow-muted-bg-hover);
+    /* deprecated alias for .btn--sm .btn--yellow */
 }
 
 .admin-btn-publish {
-    background: var(--green-muted-bg);
-    color: var(--accent-green);
-    border-color: var(--green-muted-border);
-}
-.admin-btn-publish:hover {
-    background: var(--green-muted-bg-hover);
+    /* deprecated alias for .btn--sm .btn--green */
 }
 
 .admin-btn-unpublish {
-    background: var(--bg-secondary);
-    color: var(--text-tertiary);
-    border-color: var(--border-primary);
-}
-.admin-btn-unpublish:hover {
-    background: var(--bg-tertiary);
+    /* deprecated alias for .btn--sm .btn--muted */
 }
 
 .admin-btn-delete {
-    background: var(--error-muted-bg);
-    color: var(--error);
-    border-color: var(--error-muted-border, var(--border-primary));
-}
-.admin-btn-delete:hover {
-    filter: brightness(0.9);
+    /* deprecated alias for .btn--sm .btn--red */
 }
 
 .publish-form {
@@ -705,7 +597,7 @@
     padding-top: var(--space-2xs);
 }
 
-.admin-login-box .admin-btn {
+.admin-login-box .btn {
     width: 100%;
 }
 
@@ -1121,53 +1013,15 @@
 }
 
 .param-form > button {
-    align-self: flex-start;
-    padding: var(--space-2xs) var(--space-l);
-    background: var(--accent-primary);
-    color: var(--accent-foreground);
-    border: none;
-    border-radius: 3px;
-    font-size: var(--step--1);
-    font-family: inherit;
-    cursor: pointer;
-    letter-spacing: 0.04em;
-    transition: background 0.15s;
-}
-
-.param-form > button:hover {
-    background: var(--accent-secondary);
+    /* deprecated alias for .btn--primary; kept for backward-compat */
 }
 
 .param-btn-warning {
-    padding: var(--space-3xs) var(--space-s);
-    background: var(--accent-yellow);
-    color: var(--text-primary);
-    border: none;
-    border-radius: 3px;
-    font-size: var(--step--1);
-    font-family: inherit;
-    cursor: pointer;
-    transition: filter 0.15s;
-}
-
-.param-btn-warning:hover {
-    filter: brightness(0.9);
+    /* deprecated alias for .btn--warning; kept for backward-compat */
 }
 
 .param-btn-danger {
-    padding: var(--space-3xs) var(--space-s);
-    background: var(--accent-red);
-    color: var(--accent-foreground);
-    border: none;
-    border-radius: 3px;
-    font-size: var(--step--1);
-    font-family: inherit;
-    cursor: pointer;
-    transition: filter 0.15s;
-}
-
-.param-btn-danger:hover {
-    filter: brightness(0.9);
+    /* deprecated alias for .btn--danger; kept for backward-compat */
 }
 
 .param-danger-zone {
@@ -1208,19 +1062,7 @@
 }
 
 .param-btn-export {
-    padding: var(--space-3xs) var(--space-s);
-    background: var(--primary, #2563eb);
-    color: var(--accent-foreground, #fff);
-    border: none;
-    border-radius: 3px;
-    font-size: var(--step--1);
-    font-family: inherit;
-    cursor: pointer;
-    transition: filter 0.15s;
-}
-
-.param-btn-export:hover {
-    filter: brightness(0.9);
+    /* deprecated alias for .btn--primary; kept for backward-compat */
 }
 
 
@@ -1541,7 +1383,7 @@
     min-height: 2.75rem;
     padding: 0 var(--space-2xs);
     border: 1px solid var(--border-secondary);
-    border-radius: 3px;
+    border-radius: 10px;
     color: var(--text-primary);
     font-size: var(--step--1);
     text-decoration: none;
diff --git a/app/public/assets/css/common.css b/app/public/assets/css/common.css
index 8897c36..3a571fb 100644
--- a/app/public/assets/css/common.css
+++ b/app/public/assets/css/common.css
@@ -390,6 +390,174 @@ main {
     }
 }
 
+/* ============================================================
+   BUTTONS — shared .btn base class
+   Targets both <a> and <button>, always has a background.
+   border-radius: 10px; padding: var(--space-xs)
+   ============================================================ */
+
+.btn {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    gap: var(--space-3xs);
+    padding: var(--space-xs);
+    border-radius: 10px;
+    font-size: var(--step--1);
+    font-family: inherit;
+    font-weight: 500;
+    letter-spacing: 0.04em;
+    cursor: pointer;
+    text-decoration: none;
+    line-height: 1.3;
+    border: none;
+    transition:
+        background 0.15s,
+        opacity 0.15s,
+        box-shadow 0.15s,
+        filter 0.15s;
+}
+
+.btn:hover {
+    filter: brightness(0.92);
+}
+
+/* Primary: accent background, white text */
+.btn--primary {
+    background: var(--accent-primary);
+    color: var(--accent-foreground);
+}
+
+.btn--primary:hover {
+    background: var(--accent-secondary);
+    filter: none;
+}
+
+/* Secondary: light background with border */
+.btn--secondary {
+    background: var(--bg-primary);
+    color: var(--text-secondary);
+    border: 1px solid var(--border-primary);
+}
+
+.btn--secondary:hover {
+    border-color: var(--text-secondary);
+    color: var(--text-primary);
+    filter: none;
+}
+
+/* Muted secondary: bg-secondary background */
+.btn--muted {
+    background: var(--bg-secondary);
+    color: var(--text-secondary);
+    border: 1px solid var(--border-primary);
+}
+
+.btn--muted:hover {
+    background: var(--bg-tertiary);
+    color: var(--text-primary);
+    filter: none;
+}
+
+/* Ghost: transparent bg, border, for links styled as buttons */
+.btn--ghost {
+    background: transparent;
+    color: var(--text-secondary);
+    border: 1px solid var(--border-primary);
+}
+
+.btn--ghost:hover {
+    border-color: var(--text-secondary);
+    color: var(--text-primary);
+    filter: none;
+}
+
+/* Danger: red background */
+.btn--danger {
+    background: var(--accent-red);
+    color: var(--accent-foreground);
+}
+
+.btn--danger:hover {
+    filter: brightness(0.9);
+}
+
+/* Warning: yellow background */
+.btn--warning {
+    background: var(--accent-yellow);
+    color: var(--text-primary);
+}
+
+.btn--warning:hover {
+    filter: brightness(0.9);
+}
+
+/* Success: green background */
+.btn--success {
+    background: var(--accent-green);
+    color: var(--accent-foreground);
+}
+
+.btn--success:hover {
+    filter: brightness(0.9);
+}
+
+/* Small size modifier */
+.btn--sm {
+    padding: var(--space-2xs) var(--space-xs);
+    font-size: var(--step--2);
+}
+
+/* Large size modifier */
+.btn--lg {
+    padding: var(--space-s) var(--space-m);
+    font-size: var(--step-0);
+}
+
+/* Semantic colour modifiers on the muted base (for table/action buttons) */
+.btn--blue {
+    background: var(--blue-muted-bg);
+    color: var(--accent-blue);
+    border: 1px solid var(--blue-muted-border);
+}
+
+.btn--blue:hover {
+    background: var(--blue-muted-bg-hover);
+    filter: none;
+}
+
+.btn--yellow {
+    background: var(--yellow-muted-bg);
+    color: var(--accent-yellow);
+    border: 1px solid var(--yellow-muted-border);
+}
+
+.btn--yellow:hover {
+    background: var(--yellow-muted-bg-hover);
+    filter: none;
+}
+
+.btn--green {
+    background: var(--green-muted-bg);
+    color: var(--accent-green);
+    border: 1px solid var(--green-muted-border);
+}
+
+.btn--green:hover {
+    background: var(--green-muted-bg-hover);
+    filter: none;
+}
+
+.btn--red {
+    background: var(--error-muted-bg);
+    color: var(--error);
+    border: 1px solid var(--danger-border-muted);
+}
+
+.btn--red:hover {
+    filter: brightness(0.9);
+}
+
 /* ============================================================
    SEMANTIC HTML ELEMENTS — baseline styling shared everywhere
    ============================================================ */
diff --git a/app/public/assets/css/file-access.css b/app/public/assets/css/file-access.css
index 86978ee..1731727 100644
--- a/app/public/assets/css/file-access.css
+++ b/app/public/assets/css/file-access.css
@@ -195,32 +195,15 @@
 }
 
 .access-req-btn {
-    font-family: inherit;
-    font-size: var(--step--1);
-    font-weight: 600;
-    padding: var(--space-2xs) var(--space-m);
-    border: none;
-    border-radius: 4px;
-    cursor: pointer;
-    transition: background 0.2s, opacity 0.2s;
+    /* deprecated alias for .btn; kept for backward-compat */
 }
 
 .access-req-btn--approve {
-    background: var(--accent-primary);
-    color: var(--accent-foreground);
-}
-
-.access-req-btn--approve:hover {
-    background: var(--accent-secondary);
+    /* deprecated alias for .btn--primary */
 }
 
 .access-req-btn--reject {
-    background: #e53e3e;
-    color: white;
-}
-
-.access-req-btn--reject:hover {
-    background: #c53030;
+    /* deprecated alias for .btn--danger */
 }
 
 /* Pagination */
diff --git a/app/public/assets/css/form.css b/app/public/assets/css/form.css
index e6913e4..3ba135d 100644
--- a/app/public/assets/css/form.css
+++ b/app/public/assets/css/form.css
@@ -250,20 +250,7 @@ label:has(+ div > input:required)::after {
 }
 
 .admin-btn-remove {
-    background: none;
-    border: 1px solid var(--border-primary);
-    color: var(--text-tertiary);
-    border-radius: 3px;
-    padding: var(--space-3xs) var(--space-2xs);
-    min-height: 2rem;
-    font-size: var(--step--2);
-    line-height: 1;
-    display: inline-flex;
-    align-items: center;
-    cursor: pointer;
-    transition:
-        border-color 0.15s,
-        color 0.15s;
+    /* deprecated alias for .btn--sm .btn--ghost; kept for backward-compat */
 }
 
 .admin-btn-remove:hover {
@@ -317,20 +304,7 @@ label:has(+ div > input:required)::after {
 }
 
 .form-footer button {
-    padding: var(--space-2xs) var(--space-l);
-    background: var(--accent-primary);
-    color: var(--accent-foreground);
-    border: none;
-    border-radius: 3px;
-    font-size: var(--step--1);
-    font-family: inherit;
-    cursor: pointer;
-    letter-spacing: 0.04em;
-    transition: background 0.15s;
-}
-
-.form-footer button:hover {
-    background: var(--accent-secondary);
+    /* deprecated alias for .btn--primary; kept for backward-compat */
 }
 
 /* ── Flash messages ─────────────────────────────────────────────────────── */
@@ -510,19 +484,7 @@ label:has(+ div > input:required)::after {
 }
 
 .password-gate button {
-    padding: var(--space-xs) var(--space-l);
-    font-size: var(--step--1);
-    font-family: inherit;
-    cursor: pointer;
-    background: var(--accent-primary);
-    color: var(--accent-foreground);
-    border: none;
-    border-radius: 3px;
-    transition: background 0.15s;
-}
-
-.password-gate button:hover {
-    background: var(--accent-secondary);
+    /* deprecated alias for .btn--primary; kept for backward-compat */
 }
 
 .password-error {
@@ -971,27 +933,7 @@ a.recap-file-name:hover {
 }
 
 .btn-new-form {
-    display: inline-flex;
-    align-items: center;
-    gap: var(--space-2xs);
-    padding: var(--space-m) var(--space-2xl);
-    background: var(--accent-primary);
-    color: var(--accent-foreground);
-    border: none;
-    border-radius: 6px;
-    font-size: var(--step-0);
-    font-weight: 600;
-    font-family: inherit;
-    text-decoration: none;
-    cursor: pointer;
-    letter-spacing: 0.04em;
-    transition: background 0.15s, transform 0.15s;
-    margin-top: var(--space-s);
-}
-
-.btn-new-form:hover {
-    background: var(--accent-secondary);
-    transform: translateY(-1px);
+    /* deprecated alias for .btn--primary .btn--lg; kept for backward-compat */
 }
 
 
@@ -1089,31 +1031,9 @@ a.recap-file-name:hover {
 }
 
 .btn-primary {
-    padding: var(--space-xs) var(--space-m);
-    background: var(--accent-primary);
-    color: #fff;
-    border: none;
-    border-radius: 4px;
-    font-size: var(--step-0);
-    cursor: pointer;
-    font-weight: 600;
-}
-
-.btn-primary:hover {
-    background: var(--accent-secondary, var(--accent-primary));
-    transform: translateY(-1px);
+    /* deprecated alias for .btn--primary; kept for backward-compat */
 }
 
 .btn-secondary {
-    padding: var(--space-xs) var(--space-m);
-    background: transparent;
-    color: var(--text-secondary);
-    border: 1px solid var(--border-primary);
-    border-radius: 4px;
-    font-size: var(--step-0);
-    cursor: pointer;
-}
-
-.btn-secondary:hover {
-    background: color-mix(in srgb, var(--text-secondary) 8%, transparent);
+    /* deprecated alias for .btn--secondary; kept for backward-compat */
 }
diff --git a/app/public/assets/css/public.css b/app/public/assets/css/public.css
index d40c878..f2e7c33 100644
--- a/app/public/assets/css/public.css
+++ b/app/public/assets/css/public.css
@@ -219,7 +219,7 @@
     min-height: 2.75rem;
     padding: 0 var(--space-2xs);
     border: 1px solid var(--border-secondary);
-    border-radius: 3px;
+    border-radius: 10px;
     color: var(--text-primary);
     font-size: var(--step--1);
     text-decoration: none;
diff --git a/app/public/assets/css/repertoire.css b/app/public/assets/css/repertoire.css
index 258b356..d2c949f 100644
--- a/app/public/assets/css/repertoire.css
+++ b/app/public/assets/css/repertoire.css
@@ -272,19 +272,7 @@
 }
 
 .search-apply-btn {
-    font-size: var(--step--1);
-    padding: var(--space-3xs) var(--space-xs);
-    background: var(--accent-primary);
-    color: var(--accent-foreground);
-    border: none;
-    border-radius: 3px;
-    cursor: pointer;
-    font-family: inherit;
-    transition: background 0.15s;
-}
-
-.search-apply-btn:hover {
-    background: var(--accent-secondary);
+    /* deprecated alias for .btn--primary; kept for backward-compat */
 }
 
 .search-reset-link {
@@ -311,7 +299,7 @@
     min-height: 2.75rem;
     padding: 0 var(--space-2xs);
     border: 1px solid var(--border-secondary);
-    border-radius: 3px;
+    border-radius: 10px;
     color: var(--text-primary);
     font-size: var(--step--1);
     text-decoration: none;
diff --git a/app/public/assets/css/system.css b/app/public/assets/css/system.css
index 03b48b7..c54975a 100644
--- a/app/public/assets/css/system.css
+++ b/app/public/assets/css/system.css
@@ -309,18 +309,10 @@
     font-family: ui-monospace, monospace;
 }
 .log-copy-btn {
+    /* uses .btn--secondary .btn--sm but with absolute positioning overrides */
     position: absolute;
     top: var(--space-2xs);
     right: var(--space-2xs);
-    background: var(--bg-primary);
-    border: 1px solid var(--border-primary);
-    color: var(--text-secondary);
-    border-radius: 4px;
-    font-size: var(--step--2);
-    padding: var(--space-3xs) var(--space-2xs);
-    cursor: pointer;
-    font-family: inherit;
-    transition: color .15s, border-color .15s;
     z-index: 2;
 }
 .log-copy-btn:hover {
diff --git a/app/public/assets/css/tfe.css b/app/public/assets/css/tfe.css
index 4a2fc9a..1e35e4e 100644
--- a/app/public/assets/css/tfe.css
+++ b/app/public/assets/css/tfe.css
@@ -283,23 +283,12 @@ aside figcaption {
 }
 
 .tfe-btn-request-access {
-    font-family: inherit;
-    font-size: var(--step--1);
-    font-weight: 600;
-    padding: var(--space-2xs) var(--space-s);
-    background: var(--accent);
-    color: white;
-    border: none;
-    border-radius: 4px;
-    cursor: pointer;
-    transition:
-        background 0.2s,
-        opacity 0.2s;
+    /* deprecated alias for .btn--primary; kept for backward-compat */
     margin-top: var(--space-3xs);
 }
 
 .tfe-btn-request-access:hover:not(:disabled) {
-    background: var(--accent-dark);
+    /* handled by .btn--primary */
 }
 
 .tfe-btn-request-access:disabled {
diff --git a/app/public/partage/index.php b/app/public/partage/index.php
index 6b8469d..84fbe0f 100644
--- a/app/public/partage/index.php
+++ b/app/public/partage/index.php
@@ -176,7 +176,7 @@ function requirePasswordGate(array $link, string $slug): void
                 <label for="share_password">Ce lien est protégé par un mot de passe :</label>
                 <input type="password" id="share_password" name="share_password" required autofocus>
                 <br>
-                <button type="submit">Accéder au formulaire</button>
+                <button type="submit" class="btn btn--primary">Accéder au formulaire</button>
             </form>
         </div>
     </body>
@@ -362,7 +362,7 @@ function renderShareLinkForm(string $slug, array $link): void
                 </fieldset>
 
                 <div class="form-footer">
-                    <button type="submit" name="go">Soumettre</button>
+                    <button type="submit" name="go" class="btn btn--primary">Soumettre</button>
                 </div>
             </form>
         </main>
diff --git a/app/public/partage/retry-email.php b/app/public/partage/retry-email.php
index 047143e..4192b67 100644
--- a/app/public/partage/retry-email.php
+++ b/app/public/partage/retry-email.php
@@ -111,8 +111,8 @@ $pageTitle = 'Corriger l\'adresse e-mail';
                 >
             </div>
             <div class="retry-email-actions">
-                <button type="submit" class="btn-primary">Renvoyer l'e-mail</button>
-                <button type="submit" name="skip" value="1" class="btn-secondary">Continuer sans e-mail</button>
+                <button type="submit" class="btn btn--primary">Renvoyer l'e-mail</button>
+                <button type="submit" name="skip" value="1" class="btn btn--secondary">Continuer sans e-mail</button>
             </div>
         </form>
     </section>
diff --git a/app/storage/logs/admin.log b/app/storage/logs/admin.log
index 1616cac..ede0c31 100644
--- a/app/storage/logs/admin.log
+++ b/app/storage/logs/admin.log
@@ -5,3 +5,5 @@
 {"timestamp":"2026-05-05T09:06:21+00:00","ip":"127.0.0.1","user_agent":"Mozilla/5.0 (X11; Linux x86_64; rv:150.0) Gecko/20100101 Firefox/150.0","resource":"thesis","action":"add","status":"success","context":{"thesis_id":38,"identifier":"2025-013","author":"Lila Dubois, Karim Nassar"}}
 {"timestamp":"2026-05-05T09:08:03+00:00","ip":"127.0.0.1","user_agent":"Mozilla/5.0 (X11; Linux x86_64; rv:150.0) Gecko/20100101 Firefox/150.0","resource":"thesis","action":"publish","status":"success","context":{"count":1,"ids":[38]}}
 {"timestamp":"2026-05-05T09:19:46+00:00","ip":"127.0.0.1","user_agent":"Mozilla/5.0 (X11; Linux x86_64; rv:150.0) Gecko/20100101 Firefox/150.0","resource":"thesis","action":"edit","status":"success","context":{"thesis_id":38,"title":"Jouer l'espace : dispositifs scénographiques pour l'expérience participative"}}
+{"timestamp":"2026-05-05T09:33:13+00:00","ip":"127.0.0.1","user_agent":"Mozilla/5.0 (X11; Linux x86_64; rv:150.0) Gecko/20100101 Firefox/150.0","resource":"thesis","action":"csv_export","status":"success"}
+{"timestamp":"2026-05-05T09:33:44+00:00","ip":"127.0.0.1","user_agent":"Mozilla/5.0 (X11; Linux x86_64; rv:150.0) Gecko/20100101 Firefox/150.0","resource":"settings","action":"formulaire_update","status":"success","context":{"values":{"access_type_libre_enabled":"0","access_type_interne_enabled":"1","access_type_interdit_enabled":"1","restricted_files_enabled":"1"}}}
diff --git a/app/templates/admin/acces-etudiante.php b/app/templates/admin/acces-etudiante.php
index b3d39d8..8164b95 100644
--- a/app/templates/admin/acces-etudiante.php
+++ b/app/templates/admin/acces-etudiante.php
@@ -3,7 +3,7 @@
     <div class="admin-list-toolbar">
         <h1>Accès étudiant·e</h1>
         <div class="admin-list-toolbar__right">
-            <button type="button" class="admin-btn admin-btn--sm" id="open-create-dialog">
+            <button type="button" class="btn btn--primary btn--sm" id="open-create-dialog">
                 ＋ Créer un lien
             </button>
         </div>
@@ -72,10 +72,10 @@
                     <td>
                         <div class="admin-actions">
                             <a href="/partage/<?= urlencode($link['slug']) ?>" target="_blank" rel="noopener"
-                               class="admin-btn-sm admin-btn-visit" title="Visiter le formulaire">
+                               class="btn btn--sm btn--green admin-btn-visit" title="Visiter le formulaire">
                                 👁 Visiter
                             </a>
-                            <button type="button" class="admin-btn-sm admin-btn-view"
+                            <button type="button" class="btn btn--sm btn--blue admin-btn-view"
                                     onclick="copyUrl(<?= $link['id'] ?>)" title="Copier l'URL">
                                 Copier
                             </button>
@@ -84,12 +84,12 @@
                                 <input type="hidden" name="action" value="toggle">
                                 <input type="hidden" name="id" value="<?= $link['id'] ?>">
                                 <button type="submit"
-                                        class="admin-btn-sm <?= $link['is_active'] ? 'admin-btn-unpublish' : 'admin-btn-publish' ?>"
+                                        class="btn btn--sm <?= $link['is_active'] ? 'btn--muted admin-btn-unpublish' : 'btn--green admin-btn-publish' ?>"
                                         title="<?= $link['is_active'] ? 'Désactiver' : 'Activer' ?>">
                                     <?= $link['is_active'] ? '⏸' : '▶' ?>
                                 </button>
                             </form>
-                            <button type="button" class="admin-btn-sm admin-btn-edit"
+                            <button type="button" class="btn btn--sm btn--yellow admin-btn-edit"
                                     onclick="openPasswordDialog(<?= $link['id'] ?>, <?= $hasPassword ? 'true' : 'false' ?>)"
                                     title="Modifier le mot de passe">
                                 🔑
@@ -99,7 +99,7 @@
                                 <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
                                 <input type="hidden" name="action" value="delete">
                                 <input type="hidden" name="id" value="<?= $link['id'] ?>">
-                                <button type="button" class="admin-btn-sm admin-btn-delete" title="Supprimer"
+                                <button type="button" class="btn btn--sm btn--red admin-btn-delete" title="Supprimer"
                                         onclick="openDeleteLinkDialog(<?= $link['id'] ?>)">
                                     🗑
                                 </button>
@@ -144,8 +144,8 @@
             <small>Laissez vide pour qu'il n'expire jamais.</small>
         </div>
         <div class="admin-form-footer">
-            <button type="submit" class="admin-btn">Créer le lien</button>
-            <button type="button" class="admin-btn-secondary"
+            <button type="submit" class="btn btn--primary">Créer le lien</button>
+            <button type="button" class="btn btn--secondary"
                     onclick="document.getElementById('create-dialog').close()">Annuler</button>
         </div>
     </form>
@@ -169,8 +169,8 @@
             <p id="password-current-info" style="font-size:var(--step--2);color:var(--text-secondary);margin-top:var(--space-2xs);"></p>
         </div>
         <div class="admin-form-footer">
-            <button type="submit" class="admin-btn">Enregistrer</button>
-            <button type="button" class="admin-btn-secondary"
+            <button type="submit" class="btn btn--primary">Enregistrer</button>
+            <button type="button" class="btn btn--secondary"
                     onclick="document.getElementById('password-dialog').close()">Annuler</button>
         </div>
     </form>
@@ -222,7 +222,7 @@ function openPasswordDialog(id, hasPassword) {
         <p>Supprimer ce lien ? Les soumissions via ce lien seront bloquées.</p>
     </div>
     <div class="admin-dialog__footer">
-        <button type="button" class="admin-btn admin-btn--danger" onclick="this.closest('dialog').close(); _executeDeleteLink()">Supprimer</button>
-        <button type="button" class="admin-btn-secondary" onclick="this.closest('dialog').close()">Annuler</button>
+        <button type="button" class="btn btn--danger" onclick="this.closest('dialog').close(); _executeDeleteLink()">Supprimer</button>
+        <button type="button" class="btn btn--secondary" onclick="this.closest('dialog').close()">Annuler</button>
     </div>
 </dialog>
diff --git a/app/templates/admin/acces.php b/app/templates/admin/acces.php
index 9cdfbbe..f8b8681 100644
--- a/app/templates/admin/acces.php
+++ b/app/templates/admin/acces.php
@@ -8,7 +8,7 @@
         <div class="admin-list-toolbar">
             <h2 id="acces-liens-title">Accès étudiant·e</h2>
             <div class="admin-list-toolbar__right">
-                <button type="button" class="admin-btn admin-btn--sm" id="open-create-dialog">
+                <button type="button" class="btn btn--primary btn--sm" id="open-create-dialog">
                     + Créer un lien
                 </button>
             </div>
@@ -69,10 +69,10 @@
                         <td>
                             <div class="admin-actions">
                                 <a href="/partage/<?= urlencode($link['slug']) ?>" target="_blank" rel="noopener"
-                                   class="admin-btn-sm admin-btn-visit" title="Visiter le formulaire">
+                                   class="btn btn--sm btn--green admin-btn-visit" title="Visiter le formulaire">
                                     👁 Visiter
                                 </a>
-                                <button type="button" class="admin-btn-sm admin-btn-view"
+                                <button type="button" class="btn btn--sm btn--blue admin-btn-view"
                                         onclick="copyUrl(<?= $link['id'] ?>)" title="Copier l'URL">
                                     Copier
                                 </button>
@@ -81,12 +81,12 @@
                                     <input type="hidden" name="action" value="toggle">
                                     <input type="hidden" name="id" value="<?= $link['id'] ?>">
                                     <button type="submit"
-                                            class="admin-btn-sm <?= $link['is_active'] ? 'admin-btn-unpublish' : 'admin-btn-publish' ?>"
+                                            class="btn btn--sm <?= $link['is_active'] ? 'btn--muted admin-btn-unpublish' : 'btn--green admin-btn-publish' ?>"
                                             title="<?= $link['is_active'] ? 'Désactiver' : 'Activer' ?>">
                                         <?= $link['is_active'] ? '⏸' : '▶' ?>
                                     </button>
                                 </form>
-                                <button type="button" class="admin-btn-sm admin-btn-edit"
+                                <button type="button" class="btn btn--sm btn--yellow admin-btn-edit"
                                         onclick="openPasswordDialog(<?= $link['id'] ?>, <?= $hasLinkPassword ? 'true' : 'false' ?>)"
                                         title="Modifier le mot de passe">
                                     🔑
@@ -96,7 +96,7 @@
                                     <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
                                     <input type="hidden" name="action" value="archive">
                                     <input type="hidden" name="id" value="<?= $link['id'] ?>">
-                                    <button type="button" class="admin-btn-sm admin-btn-delete" title="Archiver"
+                                    <button type="button" class="btn btn--sm btn--red admin-btn-delete" title="Archiver"
                                             onclick="openArchiveLinkDialog(<?= $link['id'] ?>)">
                                         🗄
                                     </button>
@@ -255,12 +255,12 @@
                             <?php if ($status === 'pending'): ?>
                                 <div class="access-req-card__actions">
                                     <button type="button"
-                                            class="access-req-btn access-req-btn--approve"
+                                            class="btn btn--primary access-req-btn access-req-btn--approve"
                                             onclick="openApproveDialog(<?= $req['id'] ?>)">
                                         Approuver
                                     </button>
                                     <button type="button"
-                                            class="access-req-btn access-req-btn--reject"
+                                            class="btn btn--danger access-req-btn access-req-btn--reject"
                                             onclick="openRejectDialog(<?= $req['id'] ?>)">
                                         Rejeter
                                     </button>
@@ -325,8 +325,8 @@
             <small>Laissez vide pour qu'il n'expire jamais.</small>
         </div>
         <div class="admin-form-footer">
-            <button type="submit" class="admin-btn">Créer le lien</button>
-            <button type="button" class="admin-btn-secondary"
+            <button type="submit" class="btn btn--primary">Créer le lien</button>
+            <button type="button" class="btn btn--secondary"
                     onclick="document.getElementById('create-dialog').close()">Annuler</button>
         </div>
     </form>
@@ -350,8 +350,8 @@
             <p id="password-current-info" style="font-size:var(--step--2);color:var(--text-secondary);margin-top:var(--space-2xs);"></p>
         </div>
         <div class="admin-form-footer">
-            <button type="submit" class="admin-btn">Enregistrer</button>
-            <button type="button" class="admin-btn-secondary"
+            <button type="submit" class="btn btn--primary">Enregistrer</button>
+            <button type="button" class="btn btn--secondary"
                     onclick="document.getElementById('password-dialog').close()">Annuler</button>
         </div>
     </form>
@@ -372,8 +372,8 @@
         <textarea name="admin_notes" id="approve-notes" rows="3"
                   placeholder="Message personnalisé pour le demandeur..."></textarea>
         <div class="admin-form-footer">
-            <button type="submit" class="admin-btn">Approuver et envoyer email</button>
-            <button type="button" class="admin-btn-secondary"
+            <button type="submit" class="btn btn--primary">Approuver et envoyer email</button>
+            <button type="button" class="btn btn--secondary"
                     onclick="document.getElementById('approve-dialog').close()">Annuler</button>
         </div>
     </form>
@@ -394,8 +394,8 @@
         <textarea name="admin_notes" id="reject-notes" rows="3"
                   placeholder="Raison du rejet..."></textarea>
         <div class="admin-form-footer">
-            <button type="submit" class="admin-btn admin-btn--danger">Rejeter</button>
-            <button type="button" class="admin-btn-secondary"
+            <button type="submit" class="btn btn--danger">Rejeter</button>
+            <button type="button" class="btn btn--secondary"
                     onclick="document.getElementById('reject-dialog').close()">Annuler</button>
         </div>
     </form>
@@ -457,7 +457,7 @@ function _executeArchiveLink() {
         <p>Archiver ce lien ? Il ne sera plus accessible, mais les statistiques seront conservées.</p>
     </div>
     <div class="admin-dialog__footer">
-        <button type="button" class="admin-btn admin-btn--warning" onclick="this.closest('dialog').close(); _executeArchiveLink()">Archiver</button>
-        <button type="button" class="admin-btn-secondary" onclick="this.closest('dialog').close()">Annuler</button>
+        <button type="button" class="btn btn--warning" onclick="this.closest('dialog').close(); _executeArchiveLink()">Archiver</button>
+        <button type="button" class="btn btn--secondary" onclick="this.closest('dialog').close()">Annuler</button>
     </div>
 </dialog>
diff --git a/app/templates/admin/account.php b/app/templates/admin/account.php
index 8dce07a..bd863af 100644
--- a/app/templates/admin/account.php
+++ b/app/templates/admin/account.php
@@ -57,7 +57,7 @@
         </div>
 
         <div class="admin-form-footer">
-            <button type="submit" class="admin-btn">
+            <button type="submit" class="btn btn--primary">
                 <?= $hasPassword ? 'Mettre à jour le mot de passe' : 'Définir le mot de passe' ?>
             </button>
         </div>
@@ -80,7 +80,7 @@
             <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
             <input type="hidden" name="action" value="remove_credentials">
             <input type="hidden" name="current_password_remove" id="current_password_remove" value="">
-            <button type="submit" class="admin-btn admin-btn--danger">Supprimer</button>
+            <button type="submit" class="btn btn--danger">Supprimer</button>
         </form>
     </div>
     <?php endif; ?>
diff --git a/app/templates/admin/add.php b/app/templates/admin/add.php
index 8a4b41d..c3717c5 100644
--- a/app/templates/admin/add.php
+++ b/app/templates/admin/add.php
@@ -47,7 +47,7 @@
         </fieldset>
 
         <div class="form-footer">
-            <button type="submit" name="go">Soumettre</button>
+            <button type="submit" name="go" class="btn btn--primary">Soumettre</button>
         </div>
     </form>
 </main>
diff --git a/app/templates/admin/contenus-edit.php b/app/templates/admin/contenus-edit.php
index 342ccfd..ee3d6b0 100644
--- a/app/templates/admin/contenus-edit.php
+++ b/app/templates/admin/contenus-edit.php
@@ -12,8 +12,8 @@
         <div id="editor"></div>
 
         <div class="admin-form-footer">
-            <button type="submit" class="admin-btn">Enregistrer</button>
-            <a href="/admin/contenus.php" class="admin-btn-secondary admin-cancel-link">Annuler</a>
+            <button type="submit" class="btn btn--primary">Enregistrer</button>
+            <a href="/admin/contenus.php" class="btn btn--secondary admin-cancel-link">Annuler</a>
         </div>
     </form>
 
@@ -29,8 +29,8 @@
         <div id="editor"></div>
 
         <div class="admin-form-footer">
-            <button type="submit" class="admin-btn">Enregistrer</button>
-            <a href="/admin/contenus.php#form-help-blocks" class="admin-btn-secondary admin-cancel-link">Annuler</a>
+            <button type="submit" class="btn btn--primary">Enregistrer</button>
+            <a href="/admin/contenus.php#form-help-blocks" class="btn btn--secondary admin-cancel-link">Annuler</a>
         </div>
     </form>
 
@@ -77,15 +77,15 @@
             </div>
             <?php endforeach; ?>
 
-            <button type="button" class="admin-btn admin-btn--sm add-entry-btn" data-group="<?= $gi ?>">+ Ajouter une entrée</button>
+            <button type="button" class="btn btn--primary btn--sm add-entry-btn" data-group="<?= $gi ?>">+ Ajouter une entrée</button>
         </fieldset>
         <?php endforeach; ?>
 
-        <button type="button" class="admin-btn" id="add-group-btn">+ Ajouter un <?= $aproposKey === 'contacts' ? 'contact' : 'groupe de crédit' ?></button>
+        <button type="button" class="btn btn--primary" id="add-group-btn">+ Ajouter un <?= $aproposKey === 'contacts' ? 'contact' : 'groupe de crédit' ?></button>
 
         <div class="admin-form-footer">
-            <button type="submit" class="admin-btn">Enregistrer</button>
-            <a href="/admin/contenus.php" class="admin-btn-secondary admin-cancel-link">Annuler</a>
+            <button type="submit" class="btn btn--primary">Enregistrer</button>
+            <a href="/admin/contenus.php" class="btn btn--secondary admin-cancel-link">Annuler</a>
         </div>
 
         <template id="entry-template-<?= $aproposKey ?>">
@@ -111,7 +111,7 @@
                     <label>Label :</label>
                     <input type="text" name="groups[{{gi}}][label]">
                 <?php endif; ?>
-                <button type="button" class="admin-btn admin-btn--sm add-entry-btn" data-group="{{gi}}">+ Ajouter une entrée</button>
+                <button type="button" class="btn btn--primary btn--sm add-entry-btn" data-group="{{gi}}">+ Ajouter une entrée</button>
             </fieldset>
         </template>
     </form>
diff --git a/app/templates/admin/contenus.php b/app/templates/admin/contenus.php
index 41a3a9e..faebe64 100644
--- a/app/templates/admin/contenus.php
+++ b/app/templates/admin/contenus.php
@@ -30,7 +30,7 @@
                 <td><?= htmlspecialchars($p['updated_at'] ?? '—') ?></td>
                 <td>
                     <a href="/admin/contenus-edit.php?slug=<?= urlencode($p['slug']) ?>"
-                       class="admin-btn admin-btn--sm">Éditer</a>
+                       class="btn btn--primary btn--sm">Éditer</a>
                 </td>
             </tr>
             <?php endforeach; ?>
@@ -62,7 +62,7 @@
                 <td><?= htmlspecialchars($a['updated_at'] ?? '—') ?></td>
                 <td>
                     <a href="/admin/contenus-edit.php?apropos=<?= urlencode($a['key']) ?>"
-                       class="admin-btn admin-btn--sm">Éditer</a>
+                       class="btn btn--primary btn--sm">Éditer</a>
                 </td>
             </tr>
             <?php endforeach; ?>
@@ -143,7 +143,7 @@
                         <?php endif; ?>
                     </div>
                     <a href="/admin/contenus-edit.php?form_block=<?= urlencode($b['key']) ?>"
-                       class="admin-btn admin-btn--sm fhb-edit-btn">Éditer</a>
+                       class="btn btn--primary btn--sm fhb-edit-btn">Éditer</a>
                 </div>
                 <?php endforeach; ?>
             </form>
diff --git a/app/templates/admin/edit.php b/app/templates/admin/edit.php
index 8498153..131b921 100644
--- a/app/templates/admin/edit.php
+++ b/app/templates/admin/edit.php
@@ -3,8 +3,8 @@
 
     <form method="post" action="/admin/actions/edit.php" class="admin-form" enctype="multipart/form-data">
         <div class="admin-form-footer admin-form-footer--sticky">
-            <button type="submit" class="admin-btn">Enregistrer</button>
-            <a href="/admin/" class="admin-btn-secondary admin-cancel-link">Annuler</a>
+            <button type="submit" class="btn btn--primary">Enregistrer</button>
+            <a href="/admin/" class="btn btn--secondary admin-cancel-link">Annuler</a>
         </div>
 
         <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
diff --git a/app/templates/admin/file-access.php b/app/templates/admin/file-access.php
index 779a070..8f4a364 100644
--- a/app/templates/admin/file-access.php
+++ b/app/templates/admin/file-access.php
@@ -98,12 +98,12 @@
                         <?php if ($status === 'pending'): ?>
                             <div class="access-req-card__actions">
                                 <button type="button"
-                                        class="access-req-btn access-req-btn--approve"
+                                        class="btn btn--primary access-req-btn access-req-btn--approve"
                                         onclick="openApproveDialog(<?= $req['id'] ?>)">
                                     Approuver
                                 </button>
                                 <button type="button"
-                                        class="access-req-btn access-req-btn--reject"
+                                        class="btn btn--danger access-req-btn access-req-btn--reject"
                                         onclick="openRejectDialog(<?= $req['id'] ?>)">
                                     Rejeter
                                 </button>
@@ -153,8 +153,8 @@
                   placeholder="Message personnalisé pour le demandeur..."></textarea>
 
         <div class="admin-form-footer">
-            <button type="submit" class="admin-btn">Approuver et envoyer email</button>
-            <button type="button" class="admin-btn-secondary"
+            <button type="submit" class="btn btn--primary">Approuver et envoyer email</button>
+            <button type="button" class="btn btn--secondary"
                     onclick="document.getElementById('approve-dialog').close()">Annuler</button>
         </div>
     </form>
@@ -177,8 +177,8 @@
                   placeholder="Raison du rejet..."></textarea>
 
         <div class="admin-form-footer">
-            <button type="submit" class="admin-btn admin-btn--danger">Rejeter</button>
-            <button type="button" class="admin-btn-secondary"
+            <button type="submit" class="btn btn--danger">Rejeter</button>
+            <button type="button" class="btn btn--secondary"
                     onclick="document.getElementById('reject-dialog').close()">Annuler</button>
         </div>
     </form>
diff --git a/app/templates/admin/index.php b/app/templates/admin/index.php
index 71d1cb0..92ffe48 100644
--- a/app/templates/admin/index.php
+++ b/app/templates/admin/index.php
@@ -104,9 +104,9 @@ document.addEventListener('DOMContentLoaded', () => {
                     </option>
                 <?php endforeach; ?>
             </select>
-            <button type="submit" class="admin-filters-btn">Filtrer</button>
+            <button type="submit" class="btn btn--primary admin-filters-btn">Filtrer</button>
             <?php if ($searchQuery || $yearFilter || $orientationFilter || $apFilter): ?>
-                <button type="button" class="admin-filters-reset"
+                <button type="button" class="btn btn--secondary admin-filters-reset"
                         onclick="window.location='/admin/'">&#x2715; Réinitialiser</button>
             <?php endif; ?>
         </form>
@@ -126,12 +126,12 @@ document.addEventListener('DOMContentLoaded', () => {
                     <dd class="admin-stat__number"><?= $stats['pending'] ?></dd>
                 </div>
             </dl>
-            <a href="/admin/add.php" class="admin-btn admin-btn--sm">Ajouter un TFE</a>
-            <button type="button" class="admin-btn admin-btn--sm" id="import-dialog-btn"
+            <a href="/admin/add.php" class="btn btn--primary btn--sm">Ajouter un TFE</a>
+            <button type="button" class="btn btn--primary btn--sm" id="import-dialog-btn"
                     onclick="document.getElementById('import-dialog').showModal()">
                 Importer un CSV
             </button>
-            <a href="/admin/actions/export-csv.php" class="admin-btn admin-btn--sm">
+            <a href="/admin/actions/export-csv.php" class="btn btn--primary btn--sm">
                 Exporter CSV
             </a>
         </div>
@@ -141,9 +141,9 @@ document.addEventListener('DOMContentLoaded', () => {
     <div id="bulk-actions" class="admin-bulk-actions" role="toolbar" aria-label="Actions groupées">
         <strong><span id="selected-count">0</span> TFE(s) sélectionné(s)</strong>
         <div class="admin-bulk-btns">
-            <button type="button" class="admin-btn-sm admin-btn-publish" onclick="bulkAction('publish')">Publier</button>
-            <button type="button" class="admin-btn-sm admin-btn-unpublish" onclick="bulkAction('unpublish')">Dépublier</button>
-            <button type="button" class="admin-btn-sm admin-btn-delete" onclick="bulkAction('delete')">Supprimer</button>
+            <button type="button" class="btn btn--sm btn--green admin-btn-publish" onclick="bulkAction('publish')">Publier</button>
+            <button type="button" class="btn btn--sm btn--muted admin-btn-unpublish" onclick="bulkAction('unpublish')">Dépublier</button>
+            <button type="button" class="btn btn--sm btn--red admin-btn-delete" onclick="bulkAction('delete')">Supprimer</button>
         </div>
     </div>
 
@@ -226,23 +226,23 @@ document.addEventListener('DOMContentLoaded', () => {
                 </td>
                 <td>
                     <div class="admin-actions">
-                        <a href="/admin/recapitulatif.php?id=<?= $thesis['id'] ?>" class="admin-btn-sm admin-btn-view">Voir</a>
-                        <a href="/admin/edit.php?id=<?= $thesis['id'] ?>" class="admin-btn-sm admin-btn-edit">Éditer</a>
+                        <a href="/admin/recapitulatif.php?id=<?= $thesis['id'] ?>" class="btn btn--sm btn--blue admin-btn-view">Voir</a>
+                        <a href="/admin/edit.php?id=<?= $thesis['id'] ?>" class="btn btn--sm btn--yellow admin-btn-edit">Éditer</a>
                         <form method="post" action="actions/publish.php" class="publish-form">
                             <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
                             <input type="hidden" name="thesis_id" value="<?= $thesis['id'] ?>">
                             <?php if ($thesis['is_published']): ?>
                                 <input type="hidden" name="action" value="unpublish">
-                                <button type="submit" class="admin-btn-sm admin-btn-unpublish">Dépublier</button>
+                                <button type="submit" class="btn btn--sm btn--muted admin-btn-unpublish">Dépublier</button>
                             <?php else: ?>
                                 <input type="hidden" name="action" value="publish">
-                                <button type="submit" class="admin-btn-sm admin-btn-publish">Publier</button>
+                                <button type="submit" class="btn btn--sm btn--green admin-btn-publish">Publier</button>
                             <?php endif; ?>
                         </form>
                         <form method="post" action="actions/delete.php" id="delete-form-<?= $thesis['id'] ?>" class="publish-form">
                             <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
                             <input type="hidden" name="thesis_id" value="<?= $thesis['id'] ?>">
-                            <button type="button" class="admin-btn-sm admin-btn-delete"
+                            <button type="button" class="btn btn--sm btn--red admin-btn-delete"
                                     onclick="deleteThesis(<?= $thesis['id'] ?>, <?= htmlspecialchars(json_encode($thesis['title']), ENT_QUOTES) ?>)">Supprimer</button>
                         </form>
                     </div>
@@ -281,7 +281,7 @@ document.addEventListener('DOMContentLoaded', () => {
         <p>Sélectionnez au moins un TFE avant d'effectuer une action groupée.</p>
     </div>
     <div class="admin-dialog__footer">
-        <button type="button" class="admin-btn" onclick="this.closest('dialog').close()">OK</button>
+        <button type="button" class="btn btn--primary" onclick="this.closest('dialog').close()">OK</button>
     </div>
 </dialog>
 
@@ -296,8 +296,8 @@ document.addEventListener('DOMContentLoaded', () => {
         <p><span id="bulk-confirm-word"></span> <span id="bulk-confirm-count"></span> TFE(s) ?</p>
     </div>
     <div class="admin-dialog__footer">
-        <button type="button" class="admin-btn" onclick="this.closest('dialog').close(); _executeBulkAction()">Confirmer</button>
-        <button type="button" class="admin-btn-secondary" onclick="this.closest('dialog').close()">Annuler</button>
+        <button type="button" class="btn btn--primary" onclick="this.closest('dialog').close(); _executeBulkAction()">Confirmer</button>
+        <button type="button" class="btn btn--secondary" onclick="this.closest('dialog').close()">Annuler</button>
     </div>
 </dialog>
 
@@ -312,8 +312,8 @@ document.addEventListener('DOMContentLoaded', () => {
         <p>Supprimer définitivement <strong><span id="bulk-delete-count"></span> TFE(s)</strong> ? Cette action est irréversible.</p>
     </div>
     <div class="admin-dialog__footer">
-        <button type="button" class="admin-btn admin-btn--danger" onclick="this.closest('dialog').close(); _executeBulkAction()">Supprimer</button>
-        <button type="button" class="admin-btn-secondary" onclick="this.closest('dialog').close()">Annuler</button>
+        <button type="button" class="btn btn--danger" onclick="this.closest('dialog').close(); _executeBulkAction()">Supprimer</button>
+        <button type="button" class="btn btn--secondary" onclick="this.closest('dialog').close()">Annuler</button>
     </div>
 </dialog>
 
@@ -328,8 +328,8 @@ document.addEventListener('DOMContentLoaded', () => {
         <p>Supprimer « <strong id="delete-thesis-title"></strong> » ? Cette action est irréversible.</p>
     </div>
     <div class="admin-dialog__footer">
-        <button type="button" class="admin-btn admin-btn--danger" onclick="this.closest('dialog').close(); _executeDeleteThesis()">Supprimer</button>
-        <button type="button" class="admin-btn-secondary" onclick="this.closest('dialog').close()">Annuler</button>
+        <button type="button" class="btn btn--danger" onclick="this.closest('dialog').close(); _executeDeleteThesis()">Supprimer</button>
+        <button type="button" class="btn btn--secondary" onclick="this.closest('dialog').close()">Annuler</button>
     </div>
 </dialog>
 
@@ -376,8 +376,8 @@ document.addEventListener('DOMContentLoaded', () => {
         </div>
 
         <div class="admin-form-footer">
-            <button type="submit" class="admin-btn">Importer</button>
-            <button type="button" class="admin-btn-secondary"
+            <button type="submit" class="btn btn--primary">Importer</button>
+            <button type="button" class="btn btn--secondary"
                     onclick="document.getElementById('import-dialog').close()">Annuler</button>
         </div>
     </form>
diff --git a/app/templates/admin/login.php b/app/templates/admin/login.php
index 89aa895..65b040a 100644
--- a/app/templates/admin/login.php
+++ b/app/templates/admin/login.php
@@ -11,7 +11,7 @@
                     <input type="password" id="password" name="password" required autofocus>
                 </div>
                 <div class="admin-form-footer">
-                    <button type="submit" class="admin-btn">Se connecter</button>
+                    <button type="submit" class="btn btn--primary">Se connecter</button>
                 </div>
             </form>
         </div>
diff --git a/app/templates/admin/parametres.php b/app/templates/admin/parametres.php
index 0044005..12e2b7f 100644
--- a/app/templates/admin/parametres.php
+++ b/app/templates/admin/parametres.php
@@ -24,7 +24,7 @@
                     <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
                     <input type="hidden" name="action" value="enable_maintenance">
                     <input type="hidden" name="redirect" value="/admin/parametres.php">
-                    <button type="button" class="param-btn-warning"
+                    <button type="button" class="btn btn--warning"
                             onclick="document.getElementById('enable-maintenance-dialog').showModal()">
                         Activer la maintenance
                     </button>
@@ -37,7 +37,7 @@
             <legend>Exporter la base de données</legend>
             <p>Télécharger une copie complète de la base de données SQLite.
                Cela inclut tous les TFE, auteurs, jury, mots-clés, paramètres, etc.</p>
-            <button type="button" class="param-btn-export"
+            <button type="button" class="btn btn--primary"
                     onclick="document.getElementById('export-db-dialog').showModal()">
                 Exporter la base de données
             </button>
@@ -53,7 +53,7 @@
                 <form method="post" action="actions/delete.php" id="delete-all-tfe-form">
                     <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
                     <input type="hidden" name="delete_all" value="1">
-                    <button type="button" class="param-btn-danger"
+                    <button type="button" class="btn btn--danger"
                             onclick="document.getElementById('delete-all-tfe-dialog').showModal()">
                         Supprimer tous les TFE (<?= $stats['total'] ?? '?' ?>)
                     </button>
@@ -117,7 +117,7 @@
                 </label>
             </fieldset>
 
-            <button type="submit">Enregistrer</button>
+            <button type="submit" class="btn btn--primary">Enregistrer</button>
         </form>
     </section>
 
@@ -163,7 +163,7 @@
                 </label>
             </fieldset>
 
-            <button type="submit">Enregistrer</button>
+            <button type="submit" class="btn btn--primary">Enregistrer</button>
         </form>
     </section>
 
@@ -288,7 +288,7 @@
                 </div>
             </fieldset>
 
-            <button type="submit">Enregistrer</button>
+            <button type="submit" class="btn btn--primary">Enregistrer</button>
         </form>
 
         <!-- Test d'envoi -->
@@ -306,7 +306,7 @@
                             <input type="email" id="smtp_test_email" name="test_email"
                                    placeholder="test@example.com" required>
                         </div>
-                        <button type="submit">Envoyer le test</button>
+                        <button type="submit" class="btn btn--primary">Envoyer le test</button>
                     </div>
                 </form>
             <?php endif; ?>
@@ -366,7 +366,7 @@
                        name="confirm_password" required autocomplete="new-password">
             </div>
 
-            <button type="submit">
+            <button type="submit" class="btn btn--primary">
                 <?= $hasPassword ? 'Mettre à jour le mot de passe' : 'Définir le mot de passe' ?>
             </button>
         </form>
@@ -520,8 +520,8 @@
            Cela inclut tous les TFE, auteurs, jury, mots-clés, paramètres, etc.</p>
 
         <div class="admin-form-footer">
-            <a href="/admin/actions/export-db.php" class="admin-btn">Exporter la base de données</a>
-            <button type="button" class="admin-btn-secondary"
+            <a href="/admin/actions/export-db.php" class="btn btn--primary">Exporter la base de données</a>
+            <button type="button" class="btn btn--secondary"
                     onclick="document.getElementById('export-db-dialog').close()">Annuler</button>
         </div>
     </dialog>
@@ -599,11 +599,11 @@ document.body.addEventListener('htmx:afterSwap', function(evt) {
         <p>Mettre le site en maintenance ? Les visiteurs verront une page 503.</p>
     </div>
     <div class="admin-dialog__footer">
-        <button type="button" class="admin-btn admin-btn--warning"
+        <button type="button" class="btn btn--warning"
                 onclick="this.closest('dialog').close(); document.getElementById('enable-maintenance-form').submit()">
             Activer
         </button>
-        <button type="button" class="admin-btn-secondary" onclick="this.closest('dialog').close()">Annuler</button>
+        <button type="button" class="btn btn--secondary" onclick="this.closest('dialog').close()">Annuler</button>
     </div>
 </dialog>
 
@@ -618,10 +618,10 @@ document.body.addEventListener('htmx:afterSwap', function(evt) {
         <p>⚠️ Supprimer définitivement <strong>TOUS les TFE</strong> ? Cette action est <strong>IRRÉVERSIBLE</strong>.</p>
     </div>
     <div class="admin-dialog__footer">
-        <button type="button" class="admin-btn admin-btn--danger"
+        <button type="button" class="btn btn--danger"
                 onclick="this.closest('dialog').close(); document.getElementById('delete-all-tfe-form').submit()">
             Supprimer tout
         </button>
-        <button type="button" class="admin-btn-secondary" onclick="this.closest('dialog').close()">Annuler</button>
+        <button type="button" class="btn btn--secondary" onclick="this.closest('dialog').close()">Annuler</button>
     </div>
 </dialog>
diff --git a/app/templates/admin/partials/system-log-panel.php b/app/templates/admin/partials/system-log-panel.php
index ff51795..a1179da 100644
--- a/app/templates/admin/partials/system-log-panel.php
+++ b/app/templates/admin/partials/system-log-panel.php
@@ -42,7 +42,7 @@
 
 <?php else: ?>
     <div class="log-output" id="log-output" role="log" aria-live="off" aria-label="Contenu du journal">
-        <button class="log-copy-btn" id="log-copy-btn" type="button" title="Copier le contenu"
+        <button class="btn btn--secondary btn--sm log-copy-btn" id="log-copy-btn" type="button" title="Copier le contenu"
                 onclick="copyLogContent(this);return false">
             Copier
         </button>
diff --git a/app/templates/admin/partials/system-nginx-config-panel.php b/app/templates/admin/partials/system-nginx-config-panel.php
index 6bfcc1f..2b60863 100644
--- a/app/templates/admin/partials/system-nginx-config-panel.php
+++ b/app/templates/admin/partials/system-nginx-config-panel.php
@@ -28,7 +28,7 @@
 
 <?php else: ?>
     <div class="log-output" id="log-output" role="region" aria-label="Configuration nginx">
-        <button class="log-copy-btn" id="log-copy-btn" type="button" title="Copier la configuration"
+        <button class="btn btn--secondary btn--sm log-copy-btn" id="log-copy-btn" type="button" title="Copier la configuration"
                 onclick="copyLogContent(this);return false">
             Copier
         </button>
diff --git a/app/templates/admin/recapitulatif.php b/app/templates/admin/recapitulatif.php
index 45a3ed5..37b58f4 100644
--- a/app/templates/admin/recapitulatif.php
+++ b/app/templates/admin/recapitulatif.php
@@ -6,7 +6,7 @@
             <div class="thanks-error">
                 <h1>⚠ Oups…</h1>
                 <p><?= htmlspecialchars($error) ?></p>
-                <a href="/admin/add.php?mode=student" class="btn-new-form">← Retour au formulaire</a>
+                <a href="/admin/add.php?mode=student" class="btn btn--primary btn--lg btn-new-form">← Retour au formulaire</a>
             </div>
 
         <?php elseif ($thesis): ?>
@@ -15,13 +15,13 @@
                 <p class="thanks-message">
                     Ton TFE <strong><?= htmlspecialchars($thesis['title']) ?></strong> a bien été soumis.
                 </p>
-                <a href="/admin/add.php?mode=student" class="btn-new-form">+ Ajouter un nouveau TFE</a>
+                <a href="/admin/add.php?mode=student" class="btn btn--primary btn--lg btn-new-form">+ Ajouter un nouveau TFE</a>
             </div>
         <?php else: ?>
             <div class="thanks-error">
                 <h1>Erreur</h1>
                 <p>Aucune donnée à afficher.</p>
-                <a href="/admin/add.php?mode=student" class="btn-new-form">← Retour au formulaire</a>
+                <a href="/admin/add.php?mode=student" class="btn btn--primary btn--lg btn-new-form">← Retour au formulaire</a>
             </div>
         <?php endif; ?>
     </div>
@@ -32,7 +32,7 @@
 
     <?php if ($error): ?>
         <p class="toast" role="alert" data-type="error">⚠ <?= htmlspecialchars($error) ?></p>
-        <p><a href="/admin/add.php" class="admin-btn-secondary">Retour au formulaire</a></p>
+        <p><a href="/admin/add.php" class="btn btn--secondary">Retour au formulaire</a></p>
 
     <?php elseif ($thesis): ?>
         <section>
@@ -123,14 +123,14 @@
         <?php endif; ?>
 
         <div class="admin-action-bar">
-            <a href="/admin/edit.php?id=<?= $thesisId ?>" class="admin-btn">Modifier</a>
-            <a href="/admin/add.php" class="admin-btn-secondary">Ajouter un autre TFE</a>
-            <a href="/admin/" class="admin-btn-secondary">Retour à la liste</a>
+            <a href="/admin/edit.php?id=<?= $thesisId ?>" class="btn btn--primary">Modifier</a>
+            <a href="/admin/add.php" class="btn btn--secondary">Ajouter un autre TFE</a>
+            <a href="/admin/" class="btn btn--secondary">Retour à la liste</a>
         </div>
 
     <?php else: ?>
         <p class="admin-muted">Aucune donnée à afficher.</p>
-        <p><a href="/admin/add.php" class="admin-btn-secondary">Retour au formulaire</a></p>
+        <p><a href="/admin/add.php" class="btn btn--secondary">Retour au formulaire</a></p>
     <?php endif; ?>
 
     <?php endif; ?>
diff --git a/app/templates/admin/tags.php b/app/templates/admin/tags.php
index f1cedd2..6db76c4 100644
--- a/app/templates/admin/tags.php
+++ b/app/templates/admin/tags.php
@@ -47,7 +47,7 @@ function _submitPendingTagForm() {
                         <input type="hidden" name="tag_id" value="<?= (int)$tag['id'] ?>">
                         <input class="admin-input--inline" type="text" name="new_name"
                                value="<?= htmlspecialchars($tag['name']) ?>" required>
-                        <button type="submit" class="admin-btn admin-btn--sm">Renommer</button>
+                        <button type="submit" class="btn btn--primary btn--sm">Renommer</button>
                     </form>
 
                     <!-- Merge into another tag -->
@@ -63,7 +63,7 @@ function _submitPendingTagForm() {
                                 <?php endif; ?>
                             <?php endforeach; ?>
                         </select>
-                        <button type="button" class="admin-btn admin-btn--sm admin-btn--warning"
+                        <button type="button" class="btn btn--sm btn--warning"
                                 onclick="return confirmMergeTag(this)">
                             Fusionner
                         </button>
@@ -74,7 +74,7 @@ function _submitPendingTagForm() {
                         <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
                         <input type="hidden" name="action" value="delete">
                         <input type="hidden" name="tag_id" value="<?= (int)$tag['id'] ?>">
-                        <button type="button" class="admin-btn admin-btn--sm admin-btn--danger"
+                        <button type="button" class="btn btn--sm btn--danger"
                                 onclick="confirmDeleteTag(this, <?= htmlspecialchars(json_encode($tag['name']), ENT_QUOTES) ?>)">
                             Supprimer
                         </button>
@@ -97,8 +97,8 @@ function _submitPendingTagForm() {
         <p>Fusionner ce tag dans « <strong id="merge-target-name"></strong> » ? Le tag source sera supprimé.</p>
     </div>
     <div class="admin-dialog__footer">
-        <button type="button" class="admin-btn admin-btn--warning" onclick="this.closest('dialog').close(); _submitPendingTagForm()">Fusionner</button>
-        <button type="button" class="admin-btn-secondary" onclick="this.closest('dialog').close()">Annuler</button>
+        <button type="button" class="btn btn--warning" onclick="this.closest('dialog').close(); _submitPendingTagForm()">Fusionner</button>
+        <button type="button" class="btn btn--secondary" onclick="this.closest('dialog').close()">Annuler</button>
     </div>
 </dialog>
 
@@ -113,7 +113,7 @@ function _submitPendingTagForm() {
         <p>Supprimer « <strong id="delete-tag-name"></strong> » ? Cette action est irréversible.</p>
     </div>
     <div class="admin-dialog__footer">
-        <button type="button" class="admin-btn admin-btn--danger" onclick="this.closest('dialog').close(); _submitPendingTagForm()">Supprimer</button>
-        <button type="button" class="admin-btn-secondary" onclick="this.closest('dialog').close()">Annuler</button>
+        <button type="button" class="btn btn--danger" onclick="this.closest('dialog').close(); _submitPendingTagForm()">Supprimer</button>
+        <button type="button" class="btn btn--secondary" onclick="this.closest('dialog').close()">Annuler</button>
     </div>
 </dialog>
diff --git a/app/templates/partials/form/jury-fieldset.php b/app/templates/partials/form/jury-fieldset.php
index 4214e28..63372b4 100644
--- a/app/templates/partials/form/jury-fieldset.php
+++ b/app/templates/partials/form/jury-fieldset.php
@@ -66,7 +66,7 @@ $juryIdx = max(count($juryLecteurs), 1);
                             <input type="checkbox" name="jury_lecteurs_ext[0]" value="1"
                                    aria-label="Lecteur·ice 1 — externe"> Externe
                         </label>
-                        <button type="button" class="admin-btn-remove" onclick="removeJuryRow(this)"
+                        <button type="button" class="btn btn--sm btn--ghost admin-btn-remove" onclick="removeJuryRow(this)"
                                 aria-label="Supprimer le lecteur·ice 1"><span aria-hidden="true">✕</span></button>
                     </div>
                     <?php else: ?>
@@ -81,13 +81,13 @@ $juryIdx = max(count($juryLecteurs), 1);
                                        <?= $lm['is_external'] ? 'checked' : '' ?>
                                        aria-label="Lecteur·ice <?= $lNum ?> — externe"> Externe
                             </label>
-                            <button type="button" class="admin-btn-remove" onclick="removeJuryRow(this)"
+                            <button type="button" class="btn btn--sm btn--ghost admin-btn-remove" onclick="removeJuryRow(this)"
                                     aria-label="Supprimer le lecteur·ice <?= $lNum ?>"><span aria-hidden="true">✕</span></button>
                         </div>
                         <?php endforeach; ?>
                     <?php endif; ?>
                 </div>
-                <button type="button" class="admin-btn-secondary admin-add-jury-btn"
+                <button type="button" class="btn btn--secondary admin-add-jury-btn"
                         onclick="addJuryRow()">+ Ajouter un·e lecteur·ice</button>
             </fieldset>
         </fieldset>
@@ -104,7 +104,7 @@ $juryIdx = max(count($juryLecteurs), 1);
                           + '<input type="checkbox" name="jury_lecteurs_ext[' + juryIdx + ']" value="1"'
                           + ' aria-label="Lecteur\u00b7ice ' + n + ' \u2014 externe"> Externe'
                           + '</label>'
-                          + '<button type="button" class="admin-btn-remove" onclick="removeJuryRow(this)"'
+                          + '<button type="button" class="btn btn--sm btn--ghost admin-btn-remove" onclick="removeJuryRow(this)"'
                           + ' aria-label="Supprimer le lecteur\u00b7ice ' + n + '"><span aria-hidden="true">\u2715</span></button>';
             list.appendChild(div);
             juryIdx++;
diff --git a/app/templates/public/search.php b/app/templates/public/search.php
index 11a12d6..afe7f18 100644
--- a/app/templates/public/search.php
+++ b/app/templates/public/search.php
@@ -41,7 +41,7 @@
         </select>
     </label>
 
-    <button type="submit" class="search-apply-btn">Filtrer</button>
+    <button type="submit" class="btn btn--primary search-apply-btn">Filtrer</button>
     <a href="/search?query=<?= urlencode($_GET['query'] ?? '') ?>" class="search-reset-link">Réinitialiser</a>
 </form>
 
diff --git a/app/templates/public/tfe.php b/app/templates/public/tfe.php
index 185a479..0ef64de 100644
--- a/app/templates/public/tfe.php
+++ b/app/templates/public/tfe.php
@@ -303,7 +303,7 @@
                                       placeholder="Décrivez brièvement votre motivation (recherche, collaboration, etc.)"></textarea>
                         </div>
 
-                        <button type="submit" class="tfe-btn-request-access">
+                        <button type="submit" class="btn btn--primary tfe-btn-request-access">
                             Demander l'accès
                         </button>