/* ==========================================================================
   MentionWatch · Design System
   ========================================================================== */

:root {
    /* Palette claire */
    --c-bg:           #f5f7fb;
    --c-surface:      #ffffff;
    --c-surface-2:    #f8fafc;
    --c-surface-3:    #eef2f7;
    --c-border:       #e2e8f0;
    --c-text:         #0f172a;
    --c-text-muted:   #64748b;
    --c-text-subtle:  #94a3b8;

    --c-primary:      #6366f1;
    --c-primary-2:    #4f46e5;
    --c-primary-soft: #eef2ff;

    --c-success:      #10b981;
    --c-success-soft: #d1fae5;
    --c-danger:       #ef4444;
    --c-danger-soft:  #fee2e2;
    --c-warning:      #f59e0b;
    --c-warning-soft: #fef3c7;
    --c-info:         #06b6d4;
    --c-info-soft:    #cffafe;

    --c-positive:     #16a34a;
    --c-negative:     #dc2626;
    --c-neutral:      #64748b;

    --shadow-xs: 0 1px 2px 0 rgba(15,23,42,0.05);
    --shadow-sm: 0 1px 3px rgba(15,23,42,0.08), 0 1px 2px rgba(15,23,42,0.04);
    --shadow-md: 0 4px 12px rgba(15,23,42,0.08);
    --shadow-lg: 0 10px 30px rgba(15,23,42,0.12);

    --radius-sm: 6px;
    --radius:    10px;
    --radius-lg: 16px;
    --radius-xl: 22px;

    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    --transition: 180ms cubic-bezier(.4,0,.2,1);
}

[data-theme="dark"] {
    --c-bg:           #0b1120;
    --c-surface:      #131c2e;
    --c-surface-2:    #182238;
    --c-surface-3:    #1f2a44;
    --c-border:       #283452;
    --c-text:         #e2e8f0;
    --c-text-muted:   #94a3b8;
    --c-text-subtle:  #64748b;

    --c-primary:      #818cf8;
    --c-primary-2:    #6366f1;
    --c-primary-soft: rgba(99,102,241,0.15);

    --c-success:      #34d399;
    --c-success-soft: rgba(16,185,129,0.18);
    --c-danger:       #f87171;
    --c-danger-soft:  rgba(239,68,68,0.18);
    --c-warning:      #fbbf24;
    --c-warning-soft: rgba(245,158,11,0.18);
    --c-info:         #22d3ee;
    --c-info-soft:    rgba(6,182,212,0.18);

    --c-positive:     #34d399;
    --c-negative:     #f87171;
    --c-neutral:      #94a3b8;

    --shadow-xs: 0 1px 2px 0 rgba(0,0,0,0.3);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.5);
}

/* Base ------------------------------------------------------- */
*,*::before,*::after { box-sizing: border-box; }
html { font-size: 15px; }
body {
    margin: 0;
    font-family: var(--font-sans);
    background: var(--c-bg);
    color: var(--c-text);
    line-height: 1.5;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    transition: background var(--transition), color var(--transition);
}

a { color: var(--c-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-primary-2); }

button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }

::selection { background: var(--c-primary); color: white; }

/* Layout ----------------------------------------------------- */
.app {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: 100vh;
}

.sidebar {
    background: var(--c-surface);
    border-right: 1px solid var(--c-border);
    padding: var(--space-6) var(--space-4);
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.sidebar__brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
    padding: 0 var(--space-2);
}
.sidebar__brand .logo {
    width: 38px; height: 38px;
    display: grid; place-items: center;
    background: linear-gradient(135deg, var(--c-primary), var(--c-info));
    color: white;
    border-radius: 11px;
    font-weight: 800;
    box-shadow: var(--shadow-sm);
}
.sidebar__brand h1 {
    font-size: 1.05rem;
    margin: 0;
    font-weight: 700;
    color: var(--c-text);
}
.sidebar__brand .version {
    font-size: 0.7rem;
    color: var(--c-text-muted);
}

.nav {
    list-style: none;
    padding: 0;
    margin: 0;
}
.nav__section {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--c-text-subtle);
    padding: var(--space-3) var(--space-3) var(--space-2);
    font-weight: 600;
}
.nav a {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-3);
    border-radius: var(--radius);
    color: var(--c-text-muted);
    font-weight: 500;
    transition: all var(--transition);
    margin-bottom: 2px;
    font-size: 0.92rem;
}
.nav a:hover {
    background: var(--c-surface-2);
    color: var(--c-text);
}
.nav a.active {
    background: var(--c-primary-soft);
    color: var(--c-primary);
    font-weight: 600;
}
.nav a .badge {
    margin-left: auto;
    background: var(--c-danger);
    color: white;
    font-size: 0.7rem;
    padding: 2px 7px;
    border-radius: 999px;
    font-weight: 700;
}
.nav .icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    opacity: 0.85;
}

/* Main content area ---------------------------------------- */
.main {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.topbar {
    background: var(--c-surface);
    border-bottom: 1px solid var(--c-border);
    padding: var(--space-4) var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    position: sticky;
    top: 0;
    z-index: 50;
}
.topbar__title {
    font-size: 1.15rem;
    font-weight: 600;
    margin: 0;
    color: var(--c-text);
}
.topbar__right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.theme-toggle {
    background: var(--c-surface-2);
    border: 1px solid var(--c-border);
    color: var(--c-text-muted);
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    transition: all var(--transition);
}
.theme-toggle:hover {
    color: var(--c-text);
    background: var(--c-surface-3);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--c-surface-2);
    border-radius: var(--radius);
    border: 1px solid var(--c-border);
    color: var(--c-text-muted);
    font-size: 0.9rem;
}
.user-menu .avatar {
    width: 28px; height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-primary), var(--c-info));
    color: white;
    display: grid; place-items: center;
    font-weight: 700;
    font-size: 0.8rem;
}

.content {
    padding: var(--space-6);
    flex: 1;
}
.content__header {
    margin-bottom: var(--space-6);
}
.content__title {
    font-size: 1.6rem;
    margin: 0 0 var(--space-2);
    color: var(--c-text);
    font-weight: 700;
    letter-spacing: -0.01em;
}
.content__subtitle {
    color: var(--c-text-muted);
    margin: 0;
}

/* Cards ------------------------------------------------------ */
.card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xs);
    overflow: hidden;
    transition: all var(--transition);
}
.card:hover {
    box-shadow: var(--shadow-sm);
}
.card__header {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--c-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
}
.card__title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: var(--c-text);
}
.card__body { padding: var(--space-5); }
.card__footer {
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid var(--c-border);
    background: var(--c-surface-2);
    color: var(--c-text-muted);
    font-size: 0.85rem;
}

/* Stat cards ------------------------------------------------ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}
.stat {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    position: relative;
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
}
.stat:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.stat::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--accent), transparent 60%);
    opacity: 0.06;
    pointer-events: none;
}
.stat__icon {
    width: 42px; height: 42px;
    border-radius: 12px;
    display: grid; place-items: center;
    background: var(--accent-soft);
    color: var(--accent);
    margin-bottom: var(--space-3);
    font-size: 1.2rem;
}
.stat__value {
    font-size: 1.9rem;
    font-weight: 700;
    color: var(--c-text);
    line-height: 1;
    margin-bottom: var(--space-2);
    letter-spacing: -0.02em;
}
.stat__label {
    color: var(--c-text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 500;
}
.stat__delta {
    font-size: 0.75rem;
    margin-top: var(--space-2);
    color: var(--c-text-subtle);
}

.stat--primary { --accent: var(--c-primary); --accent-soft: var(--c-primary-soft); }
.stat--success { --accent: var(--c-success); --accent-soft: var(--c-success-soft); }
.stat--danger  { --accent: var(--c-danger);  --accent-soft: var(--c-danger-soft); }
.stat--warning { --accent: var(--c-warning); --accent-soft: var(--c-warning-soft); }
.stat--info    { --accent: var(--c-info);    --accent-soft: var(--c-info-soft); }

/* Buttons --------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 9px 16px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1;
    background: var(--c-surface-2);
    color: var(--c-text);
    transition: all var(--transition);
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
}
.btn:hover { background: var(--c-surface-3); color: var(--c-text); }
.btn--primary {
    background: var(--c-primary);
    color: white;
    border-color: var(--c-primary);
}
.btn--primary:hover {
    background: var(--c-primary-2);
    color: white;
    border-color: var(--c-primary-2);
}
.btn--ghost { background: transparent; border-color: var(--c-border); }
.btn--ghost:hover { background: var(--c-surface-2); }
.btn--danger { background: var(--c-danger); color: white; border-color: var(--c-danger); }
.btn--danger:hover { background: #dc2626; }
.btn--success { background: var(--c-success); color: white; border-color: var(--c-success); }
.btn--sm { padding: 6px 12px; font-size: 0.82rem; border-radius: 8px; }
.btn--xs { padding: 4px 10px; font-size: 0.78rem; border-radius: 6px; }
.btn--icon { padding: 8px; width: 36px; height: 36px; }
.btn--block { width: 100%; }

/* Forms ----------------------------------------------------- */
.form-group { margin-bottom: var(--space-4); }
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}
.label {
    display: block;
    font-size: 0.85rem;
    color: var(--c-text-muted);
    margin-bottom: var(--space-2);
    font-weight: 500;
}
.input, .select, .textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    background: var(--c-surface);
    color: var(--c-text);
    font-size: 0.9rem;
    transition: all var(--transition);
}
.input:focus, .select:focus, .textarea:focus {
    outline: none;
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px var(--c-primary-soft);
}
.textarea { resize: vertical; min-height: 90px; font-family: var(--font-sans); }

.checkbox-wrap {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    user-select: none;
}
.switch {
    position: relative;
    width: 38px; height: 22px;
    background: var(--c-surface-3);
    border-radius: 999px;
    border: 1px solid var(--c-border);
    cursor: pointer;
    transition: all var(--transition);
    flex-shrink: 0;
}
.switch::after {
    content: '';
    position: absolute;
    top: 2px; left: 2px;
    width: 16px; height: 16px;
    background: white;
    border-radius: 50%;
    box-shadow: var(--shadow-xs);
    transition: transform var(--transition);
}
.switch input { display: none; }
.switch.is-on { background: var(--c-primary); border-color: var(--c-primary); }
.switch.is-on::after { transform: translateX(16px); }

/* Tables ---------------------------------------------------- */
.table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--c-border);
    background: var(--c-surface);
}
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
.table thead {
    background: var(--c-surface-2);
}
.table th {
    text-align: left;
    padding: var(--space-3) var(--space-4);
    font-weight: 600;
    color: var(--c-text-muted);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--c-border);
    white-space: nowrap;
}
.table td {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--c-border);
    vertical-align: top;
    color: var(--c-text);
}
.table tbody tr {
    transition: background var(--transition);
}
.table tbody tr:hover {
    background: var(--c-surface-2);
}
.table tbody tr:last-child td {
    border-bottom: none;
}

/* Badges & chips ------------------------------------------- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 9px;
    border-radius: 999px;
    font-size: 0.74rem;
    font-weight: 600;
    line-height: 1;
}
.badge--positive { background: var(--c-success-soft); color: var(--c-positive); }
.badge--negative { background: var(--c-danger-soft); color: var(--c-negative); }
.badge--neutral  { background: var(--c-surface-3); color: var(--c-neutral); }
.badge--primary  { background: var(--c-primary-soft); color: var(--c-primary); }
.badge--warning  { background: var(--c-warning-soft); color: var(--c-warning); }
.badge--info     { background: var(--c-info-soft); color: var(--c-info); }
.badge--own      { background: var(--c-success-soft); color: var(--c-success); }
.badge--competitor { background: var(--c-warning-soft); color: var(--c-warning); }

.chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--c-surface-3);
    border: 1px solid var(--c-border);
    font-size: 0.8rem;
    color: var(--c-text-muted);
}
.chip__dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; }

/* Mention list --------------------------------------------- */
.mention {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    transition: all var(--transition);
    display: grid;
    grid-template-columns: 4px 1fr auto;
    gap: var(--space-4);
    align-items: flex-start;
    position: relative;
}
.mention:hover { box-shadow: var(--shadow-sm); transform: translateY(-1px); }
.mention__rail {
    width: 4px;
    align-self: stretch;
    border-radius: 2px;
    background: var(--c-border);
}
.mention--positive .mention__rail { background: var(--c-positive); }
.mention--negative .mention__rail { background: var(--c-negative); }
.mention--neutral  .mention__rail { background: var(--c-neutral); }

.mention__main { min-width: 0; }
.mention__meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: 6px;
    flex-wrap: wrap;
    font-size: 0.78rem;
    color: var(--c-text-muted);
}
.mention__title {
    font-size: 0.98rem;
    font-weight: 600;
    margin: 0 0 4px;
    color: var(--c-text);
    line-height: 1.4;
}
.mention__title a { color: inherit; }
.mention__title a:hover { color: var(--c-primary); }
.mention__snippet {
    color: var(--c-text-muted);
    font-size: 0.88rem;
    line-height: 1.5;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.mention__footer {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-top: var(--space-2);
    font-size: 0.78rem;
    color: var(--c-text-subtle);
    flex-wrap: wrap;
}
.mention__actions {
    display: flex;
    flex-direction: column;
    gap: 6px;
    align-items: flex-end;
}
.mention__impact {
    font-weight: 700;
    font-size: 1rem;
    color: var(--c-text);
    text-align: right;
}
.mention__impact small {
    font-weight: 400;
    color: var(--c-text-subtle);
    display: block;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mentions-list { display: flex; flex-direction: column; gap: var(--space-3); }

/* Filters bar ---------------------------------------------- */
.filters {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
    align-items: flex-end;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    margin-bottom: var(--space-5);
}
.filters .filter {
    flex: 1;
    min-width: 140px;
}

/* Charts container ----------------------------------------- */
.chart-container {
    position: relative;
    height: 280px;
    width: 100%;
}
.chart-container--lg { height: 360px; }

/* Pagination ----------------------------------------------- */
.pagination {
    display: flex;
    gap: 6px;
    margin-top: var(--space-5);
    align-items: center;
    justify-content: center;
}
.pagination a, .pagination span {
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--c-text-muted);
    border: 1px solid var(--c-border);
    background: var(--c-surface);
    text-decoration: none;
    transition: all var(--transition);
}
.pagination a:hover { background: var(--c-surface-2); color: var(--c-text); }
.pagination .current { background: var(--c-primary); color: white; border-color: var(--c-primary); font-weight: 600; }

/* Auth pages ----------------------------------------------- */
.auth-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--c-bg) 0%, var(--c-primary-soft) 100%);
    padding: var(--space-6);
}
.auth-card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-lg);
    max-width: 420px;
    width: 100%;
}
.auth-card__brand {
    text-align: center;
    margin-bottom: var(--space-6);
}
.auth-card__brand .logo {
    width: 56px; height: 56px;
    background: linear-gradient(135deg, var(--c-primary), var(--c-info));
    color: white;
    border-radius: 16px;
    display: inline-grid; place-items: center;
    font-size: 1.4rem; font-weight: 800;
    margin-bottom: var(--space-3);
}
.auth-card h1 { margin: 0 0 var(--space-2); font-size: 1.4rem; font-weight: 700; }
.auth-card p  { color: var(--c-text-muted); margin-top: 0; }

/* Flash messages ------------------------------------------- */
.flash {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius);
    margin-bottom: var(--space-4);
    font-size: 0.9rem;
    border: 1px solid transparent;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}
.flash--success { background: var(--c-success-soft); color: var(--c-positive); border-color: var(--c-success); }
.flash--error   { background: var(--c-danger-soft);  color: var(--c-negative); border-color: var(--c-danger); }
.flash--info    { background: var(--c-info-soft);    color: var(--c-info); border-color: var(--c-info); }

/* Empty state ---------------------------------------------- */
.empty-state {
    text-align: center;
    padding: var(--space-10) var(--space-6);
    color: var(--c-text-muted);
}
.empty-state__icon {
    font-size: 3rem;
    opacity: 0.4;
    margin-bottom: var(--space-3);
}
.empty-state h3 { color: var(--c-text); margin: 0 0 var(--space-2); }

/* Tabs ----------------------------------------------------- */
.tabs {
    display: flex;
    gap: 2px;
    border-bottom: 1px solid var(--c-border);
    margin-bottom: var(--space-5);
}
.tabs__item {
    padding: var(--space-3) var(--space-4);
    color: var(--c-text-muted);
    border-bottom: 2px solid transparent;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    background: transparent;
    border-top: none; border-left: none; border-right: none;
}
.tabs__item.active { color: var(--c-primary); border-bottom-color: var(--c-primary); }

/* Source list ---------------------------------------------- */
.source-card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    display: grid;
    grid-template-columns: 44px 1fr auto;
    gap: var(--space-4);
    align-items: center;
    transition: all var(--transition);
}
.source-card:hover { box-shadow: var(--shadow-sm); }
.source-card__icon {
    width: 44px; height: 44px;
    border-radius: 12px;
    display: grid; place-items: center;
    color: white;
    font-weight: 700;
}
.source-card__name { font-weight: 600; margin: 0; color: var(--c-text); }
.source-card__meta { color: var(--c-text-muted); font-size: 0.83rem; margin-top: 2px; }

/* Health indicator ----------------------------------------- */
.health-dot {
    display: inline-block;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--c-success);
    margin-right: 6px;
}
.health-dot--warning { background: var(--c-warning); }
.health-dot--danger  { background: var(--c-danger); }
.health-dot--off     { background: var(--c-text-subtle); }

/* Settings ------------------------------------------------- */
.settings-section {
    margin-bottom: var(--space-8);
}
.settings-section__title {
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--c-text-muted);
    margin: 0 0 var(--space-3);
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--c-border);
}

/* Utilities ------------------------------------------------- */
.text-muted { color: var(--c-text-muted); }
.text-success { color: var(--c-positive); }
.text-danger  { color: var(--c-negative); }
.text-warning { color: var(--c-warning); }
.text-center  { text-align: center; }
.text-right   { text-align: right; }
.font-mono    { font-family: var(--font-mono); font-size: 0.85em; }
.text-sm      { font-size: 0.85rem; }
.text-xs      { font-size: 0.75rem; }
.fw-bold      { font-weight: 700; }
.fw-medium    { font-weight: 500; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.mb-6 { margin-bottom: var(--space-6); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.flex { display: flex; }
.flex-1 { flex: 1; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.grid-dashboard {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-5);
}

/* Mobile / Responsive -------------------------------------- */
@media (max-width: 1024px) {
    .grid-dashboard { grid-template-columns: 1fr; }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .app { grid-template-columns: 1fr; }
    .sidebar {
        position: fixed;
        left: -280px;
        width: 260px;
        z-index: 200;
        transition: left var(--transition);
        box-shadow: var(--shadow-lg);
    }
    .sidebar.is-open { left: 0; }
    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(15,23,42,0.5);
        z-index: 150;
    }
    .sidebar-overlay.is-visible { display: block; }
    .topbar__menu-btn { display: grid !important; }

    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .stat__value { font-size: 1.5rem; }
    .grid-3 { grid-template-columns: 1fr; }
    .grid-2 { grid-template-columns: 1fr; }
    .content { padding: var(--space-4); }
    .mention {
        grid-template-columns: 4px 1fr;
    }
    .mention__actions {
        grid-column: 2;
        flex-direction: row;
        align-items: center;
        margin-top: var(--space-2);
    }
    .filters { flex-direction: column; }
    .filters .filter { width: 100%; }
    .topbar { padding: var(--space-3) var(--space-4); }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .auth-card { padding: var(--space-5); }
}

.topbar__menu-btn {
    display: none;
    background: var(--c-surface-2);
    border: 1px solid var(--c-border);
    color: var(--c-text);
    width: 38px; height: 38px;
    border-radius: 10px;
    place-items: center;
}

/* Loading spinner ------------------------------------------ */
.spinner {
    display: inline-block;
    width: 16px; height: 16px;
    border: 2px solid var(--c-border);
    border-top-color: var(--c-primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Source category icons ------------------------------------ */
.source-icon-text     { background: var(--c-info); }
.source-icon-audio    { background: var(--c-warning); }
.source-icon-visual   { background: var(--c-primary); }
.source-icon-web      { background: var(--c-success); }
.source-icon-social   { background: #ec4899; }
.source-icon-forum    { background: #8b5cf6; }
.source-icon-news     { background: #f97316; }
.source-icon-dev      { background: #14b8a6; }