/* =============================================================
   OmniDesk Messenger — Design System
   Style : SaaS professionnel, sidebar sombre, messagerie premium
   ============================================================= */

/* ---------- 1. Design Tokens ---------- */
:root {
    /* Neutrals (surface) */
    --color-bg: #f4f5fa;
    --color-surface: #ffffff;
    --color-border: #e6e8f0;
    --color-border-strong: #d3d7e4;

    --color-text: #14162b;
    --color-text-muted: #656a85;
    --color-text-subtle: #9599b3;

    /* Brand / accent */
    --color-primary: #4f46e5;
    --color-primary-hover: #4338ca;
    --color-primary-soft: #eef0ff;
    --color-primary-rgb: 79, 70, 229;

    /* Status colors */
    --color-success: #059669;
    --color-success-soft: #e8faf3;
    --color-warning: #d97706;
    --color-warning-soft: #fff8ea;
    --color-danger: #e11d48;
    --color-danger-soft: #fef1f4;
    --color-info: #2563eb;
    --color-info-soft: #eef4ff;
    --color-neutral: #656a85;
    --color-neutral-soft: #f0f1f7;

    /* Sidebar (dark) */
    --sidebar-bg: #14162b;
    --sidebar-bg-elevated: #1c1f3a;
    --sidebar-border: #262a4a;
    --sidebar-text: #c7c9e0;
    --sidebar-text-muted: #7d81a3;
    --sidebar-text-active: #ffffff;

    /* Elevation */
    --shadow-sm: 0 1px 2px rgba(20, 22, 43, 0.05);
    --shadow-md: 0 6px 16px rgba(20, 22, 43, 0.08);
    --shadow-lg: 0 16px 32px rgba(20, 22, 43, 0.12);
    --shadow-focus: 0 0 0 3px rgba(var(--color-primary-rgb), 0.16);

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 999px;

    /* Spacing scale */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 48px;

    /* Typography */
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
        monospace;

    --sidebar-width: 252px;
    --header-height: 68px;
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--space-2);
    font-weight: 700;
    letter-spacing: -0.015em;
    color: var(--color-text);
}

h1 { font-size: 26px; }
h2 { font-size: 19px; }
h3 { font-size: 16px; font-weight: 600; }

p { margin: 0 0 var(--space-3); color: var(--color-text-muted); }

a {
    color: var(--color-primary);
    text-decoration: none;
}
a:hover { color: var(--color-primary-hover); }

img { max-width: 100%; display: block; }

ul, ol { margin: 0; padding: 0; list-style: none; }

button { font-family: inherit; }

::selection { background: rgba(var(--color-primary-rgb), 0.18); }

/* ---------- 3. Layout Shell ---------- */
.app-shell {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    background: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    padding: var(--space-4) var(--space-3);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2);
    margin-bottom: var(--space-5);
    color: var(--sidebar-text-active);
}

.sidebar-brand-mark {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.sidebar-brand-name {
    font-weight: 800;
    font-size: 16.5px;
    letter-spacing: -0.02em;
    color: var(--sidebar-text-active);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.sidebar-nav-bottom {
    margin-top: auto;
    padding-top: var(--space-3);
    border-top: 1px solid var(--sidebar-border);
}

.sidebar-nav a, .sidebar-nav-bottom a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px var(--space-3);
    margin-bottom: 2px;
    border-radius: var(--radius-sm);
    color: var(--sidebar-text);
    font-weight: 500;
    font-size: 13.5px;
    text-decoration: none;
    transition: background 0.15s ease, color 0.15s ease;
}

.nav-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    opacity: 0.85;
}

.sidebar-nav a:hover, .sidebar-nav-bottom a:hover {
    background: var(--sidebar-bg-elevated);
    color: var(--sidebar-text-active);
}

.sidebar-nav a.active, .sidebar-nav-bottom a.active {
    background: var(--color-primary);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}

.sidebar-nav a.active .nav-icon, .sidebar-nav-bottom a.active .nav-icon { opacity: 1; }

.main-content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.topbar {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    min-width: 0;
    padding: 0 var(--space-5);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.page-container {
    padding: var(--space-5);
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

.user-chip {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-chip-avatar {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-full);
    background: var(--color-primary-soft);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12.5px;
    font-weight: 700;
    flex-shrink: 0;
}

.user-chip-info {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 3px;
}

.user-chip-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1;
}

/* ---------- 4. Cards ---------- */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--space-5);
}

.card + .card { margin-top: var(--space-4); }

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.card-header h2, .card-header h3 { margin: 0; }

.card-subtitle {
    color: var(--color-text-subtle);
    font-size: 12.5px;
    margin-top: 2px;
}

/* ---------- 5. Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 9px 16px;
    font-size: 13.5px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease, transform 0.05s ease;
    line-height: 1;
    white-space: nowrap;
}

.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: var(--shadow-sm);
}
.btn-primary:hover:not(:disabled) { background: var(--color-primary-hover); }

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-border-strong);
}
.btn-secondary:hover:not(:disabled) { background: var(--color-neutral-soft); }

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}
.btn-danger:hover:not(:disabled) { background: #be123c; }

.btn-ghost {
    background: transparent;
    color: var(--color-text-muted);
}
.btn-ghost:hover:not(:disabled) { background: var(--color-neutral-soft); color: var(--color-text); }

.btn-sm { padding: 6px 12px; font-size: 12.5px; }

/* ---------- 6. Forms ---------- */
.form-group { margin-bottom: var(--space-4); }

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    font-size: 14px;
    font-family: inherit;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

.form-hint { font-size: 12px; color: var(--color-text-subtle); margin-top: var(--space-1); }
.form-error { font-size: 12px; color: var(--color-danger); margin-top: var(--space-1); }

/* ---------- 7. Badges (statuts) ---------- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    font-size: 11.5px;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: capitalize;
    line-height: 1.6;
}

.badge::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

.badge-pending   { background: var(--color-warning-soft); color: var(--color-warning); }
.badge-assigned  { background: var(--color-info-soft);    color: var(--color-info); }
.badge-closed    { background: var(--color-success-soft); color: var(--color-success); }
.badge-blocked   { background: var(--color-danger-soft);  color: var(--color-danger); }
.badge-neutral   { background: var(--color-neutral-soft); color: var(--color-neutral); }

/* ---------- 8. Tables ---------- */
.table-wrap {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13.5px;
}

thead th {
    text-align: left;
    padding: 10px 16px;
    background: var(--color-neutral-soft);
    color: var(--color-text-muted);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    border-bottom: 1px solid var(--color-border);
}

tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
}

tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #fbfbfd; }

/* ---------- 9. Alerts / Flash messages ---------- */
.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: 13.5px;
    margin-bottom: var(--space-4);
    border: 1px solid transparent;
}

.alert-success { background: var(--color-success-soft); color: var(--color-success); border-color: #b7ecd9; }
.alert-danger  { background: var(--color-danger-soft);  color: var(--color-danger);  border-color: #fbc9d4; }
.alert-warning { background: var(--color-warning-soft); color: var(--color-warning); border-color: #fbe1ae; }
.alert-info    { background: var(--color-info-soft);    color: var(--color-info);    border-color: #bfd6fb; }

/* ---------- 10. KPI / Stat cards ---------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4) var(--space-5);
    box-shadow: var(--shadow-sm);
}

.stat-label {
    font-size: 12.5px;
    color: var(--color-text-subtle);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: var(--space-2);
}

.stat-value {
    font-size: 30px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

/* ---------- 11. Login screen ---------- */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(circle at 15% 10%, rgba(var(--color-primary-rgb), 0.10), transparent 45%),
        radial-gradient(circle at 85% 90%, rgba(52, 211, 153, 0.10), transparent 45%),
        var(--color-bg);
    padding: var(--space-4);
}

.auth-card {
    width: 100%;
    max-width: 380px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--space-6);
}

.auth-logo {
    width: 52px;
    height: 52px;
    margin: 0 auto var(--space-4);
    border-radius: var(--radius-md);
}

/* ---------- 11b. Page d'accueil ---------- */
.landing {
    min-height: 100vh;
    background:
        radial-gradient(circle at 15% 10%, rgba(var(--color-primary-rgb), 0.10), transparent 45%),
        radial-gradient(circle at 85% 90%, rgba(52, 211, 153, 0.10), transparent 45%),
        var(--color-bg);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-7) var(--space-4) var(--space-5);
}

.landing-hero {
    text-align: center;
    max-width: 560px;
    margin-bottom: var(--space-7);
}

.landing-logo {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    margin: 0 auto var(--space-4);
    box-shadow: var(--shadow-md);
}

.landing-hero h1 {
    font-size: 34px;
    margin-bottom: var(--space-3);
}

.landing-tagline {
    font-size: 15px;
    color: var(--color-text-muted);
    margin-bottom: var(--space-5);
}

.landing-cta {
    padding: 12px 28px;
    font-size: 14.5px;
}

.landing-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-4);
    max-width: 920px;
    width: 100%;
    margin-bottom: var(--space-6);
}

.feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--space-5);
    text-align: center;
}

.feature-icon {
    font-size: 28px;
    margin-bottom: var(--space-2);
}

.feature-card h3 { margin-bottom: var(--space-2); }
.feature-card p { font-size: 13px; margin-bottom: 0; }

.landing-footer {
    font-size: 12.5px;
    color: var(--color-text-subtle);
    text-align: center;
}

.auth-card h1 { text-align: center; }
.auth-card .card-subtitle { text-align: center; margin-bottom: var(--space-5); }

/* ---------- 12. Utilities ---------- */
.text-muted { color: var(--color-text-muted); }
.text-subtle { color: var(--color-text-subtle); }
.text-center { text-align: center; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mb-0 { margin-bottom: 0; }

/* ---------- 13. Messenger (dashboard + chat) ---------- */
.messenger {
    display: flex;
    height: calc(100vh - var(--header-height) - (var(--space-5) * 2));
    min-height: 480px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.messenger-list {
    width: 330px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--color-border);
    background: #fbfbfe;
}

.messenger-search {
    padding: var(--space-3);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}

.messenger-search input {
    width: 100%;
    padding: 8px 14px;
    font-size: 13px;
    font-family: inherit;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-full);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.messenger-search input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

.conv-list-scroll {
    flex: 1;
    overflow-y: auto;
}

.conv-item {
    position: relative;
    border-bottom: 1px solid var(--color-border);
    transition: background 0.15s ease;
}

.conv-item:hover { background: var(--color-neutral-soft); }
.conv-item.is-active { background: var(--color-primary-soft); box-shadow: inset 3px 0 0 var(--color-primary); }

.conv-item-link {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-3);
    color: inherit;
}
.conv-item-link:hover { color: inherit; }

.conv-avatar {
    flex-shrink: 0;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.conv-info { flex: 1; min-width: 0; }

.conv-info-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
}

.conv-name {
    font-weight: 600;
    font-size: 13.5px;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conv-time { font-size: 11px; color: var(--color-text-subtle); flex-shrink: 0; }

.conv-info-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    margin-top: 3px;
}

.conv-snippet {
    font-size: 12.5px;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conv-item .btn-claim {
    margin: 0 var(--space-3) var(--space-3);
}

.conv-owner-tag {
    display: block;
    margin: 0 var(--space-3) var(--space-3);
    font-size: 11.5px;
    font-weight: 600;
    color: var(--color-primary);
}

.messenger-chat {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
}

.messenger-empty {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.messenger-chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    flex-wrap: wrap;
    min-width: 0;
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
}

.chat-back-link {
    display: none;
    align-items: center;
    gap: 6px;
    padding: var(--space-3) var(--space-4) 0;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-muted);
}
.chat-back-link:hover { color: var(--color-primary); }
.chat-back-link .nav-icon { width: 16px; height: 16px; }

.notes-panel {
    background: var(--color-warning-soft);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-3) var(--space-4);
}

.notes-list {
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: var(--space-2);
}

.note-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--space-2) var(--space-3);
    margin-bottom: var(--space-2);
}

.note-item:last-child { margin-bottom: 0; }

.note-item-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    margin-bottom: 3px;
}

.note-author { font-size: 12px; font-weight: 700; color: var(--color-warning); }
.note-time { font-size: 11px; color: var(--color-text-subtle); }
.note-body { font-size: 13px; color: var(--color-text); white-space: pre-wrap; word-break: break-word; }

.note-form {
    display: flex;
    align-items: flex-end;
    gap: var(--space-2);
}

.note-form textarea { flex: 1; resize: none; }

.chat-thread {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--space-4) var(--space-5);
    background:
        radial-gradient(circle at 100% 0%, rgba(var(--color-primary-rgb), 0.03), transparent 40%);
}

.chat-bubble {
    max-width: 68%;
    min-width: 0;
    padding: 10px var(--space-3);
    border-radius: var(--radius-md);
    font-size: 13.5px;
    box-shadow: var(--shadow-sm);
}

.chat-bubble-client {
    align-self: flex-start;
    background: var(--color-neutral-soft);
    color: var(--color-text);
    border-bottom-left-radius: 4px;
}

.chat-bubble-closer {
    align-self: flex-end;
    background: var(--color-primary);
    color: #ffffff;
    border-bottom-right-radius: 4px;
}

.chat-bubble-closer .chat-bubble-meta { color: rgba(255, 255, 255, 0.7); }

.chat-bubble-body { white-space: pre-wrap; word-break: break-word; }
.chat-bubble-body a, .note-body a { text-decoration: underline; word-break: break-all; }
.chat-bubble-closer .chat-bubble-body a { color: #ffffff; }

.chat-bubble-meta {
    margin-top: 4px;
    font-size: 11px;
    color: var(--color-text-subtle);
}

.chat-attachment-image {
    display: block;
    max-width: 240px;
    max-height: 240px;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-1);
}

.chat-attachment-file {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: var(--space-2) var(--space-3);
    margin-bottom: var(--space-1);
    background: rgba(255, 255, 255, 0.65);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 12.5px;
    font-weight: 600;
    color: inherit;
}

.messenger-composer {
    display: flex;
    align-items: flex-end;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-top: 1px solid var(--color-border);
}

.messenger-composer textarea {
    resize: none;
    border-radius: var(--radius-lg);
}

.messenger-composer .btn-icon {
    flex-shrink: 0;
    padding: 9px 11px;
    font-size: 16px;
    line-height: 1;
    border-radius: var(--radius-full);
}

.messenger-composer-input {
    flex: 1;
    min-width: 0;
}

.composer-file-preview {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    margin-bottom: var(--space-2);
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-soft);
    border-radius: var(--radius-full);
}

.messenger-composer-closed {
    padding: var(--space-3) var(--space-4);
    border-top: 1px solid var(--color-border);
    background: var(--color-neutral-soft);
}

/* ---------- 14. Responsive ---------- */
@media (max-width: 768px) {
    .app-shell { flex-direction: column; }
    .sidebar {
        width: 100%;
        min-width: 0;
        flex-direction: row;
        align-items: center;
        border-right: none;
        border-bottom: 1px solid var(--sidebar-border);
        padding: var(--space-2) 84px var(--space-2) var(--space-3);
    }
    .main-content { min-width: 0; }
    .sidebar-brand { display: none; }
    .sidebar-nav {
        flex-direction: row;
        flex: 1 1 auto;
        min-width: 0;
        overflow-x: auto;
        align-items: center;
    }
    .sidebar-nav ul { display: flex; align-items: center; gap: var(--space-1); flex-shrink: 0; }
    .sidebar-nav a, .sidebar-nav-bottom a { white-space: nowrap; padding: 10px; }
    .sidebar-nav .nav-label, .sidebar-nav-bottom .nav-label { display: none; }
    .sidebar-nav .nav-icon, .sidebar-nav-bottom .nav-icon { width: 20px; height: 20px; }
    .sidebar-nav-bottom {
        display: flex;
        align-items: center;
        gap: var(--space-1);
        position: fixed;
        top: 0;
        right: 0;
        height: 56px;
        padding-right: var(--space-3);
        margin: 0;
        border: none;
        background: var(--sidebar-bg);
        z-index: 30;
    }
    .page-container { padding: var(--space-4); }
    .topbar h3 { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .user-chip { min-width: 0; }
    .user-chip-info { display: none; }

    .messenger {
        flex-direction: column;
        height: calc(100vh - var(--header-height) - (var(--space-4) * 2));
    }

    /* Navigation façon WhatsApp : un seul panneau visible à la fois */
    .messenger-list {
        width: 100%;
        border-right: none;
    }
    .messenger-chat { width: 100%; }

    .messenger:not(.has-active-chat) .messenger-chat { display: none; }
    .messenger.has-active-chat .messenger-list { display: none; }

    .chat-back-link { display: flex; }
}