/* ===============================================================
   SMS SaaS Platform — Dashboard Admin
   Variables, base y componentes
   =============================================================== */

:root {
    --primary:        #4f46e5;
    --primary-dark:   #4338ca;
    --primary-light:  #eef2ff;
    --secondary:      #64748b;
    --success:        #10b981;
    --success-light:  #d1fae5;
    --warning:        #f59e0b;
    --warning-light:  #fef3c7;
    --danger:         #ef4444;
    --danger-light:   #fee2e2;
    --info:           #3b82f6;
    --info-light:     #dbeafe;

    --sidebar-bg:     #111827;
    --sidebar-hover:  #1f2937;
    --sidebar-active: #4f46e5;
    --sidebar-text:   #cbd5e1;
    --sidebar-text-active: #ffffff;
    --sidebar-width:  260px;

    --topbar-height:  64px;

    --body-bg:        #f8fafc;
    --card-bg:        #ffffff;
    --border:         #e2e8f0;
    --text:           #0f172a;
    --text-muted:     #64748b;

    --radius:         10px;
    --radius-sm:      6px;
    --shadow-sm:      0 1px 3px rgba(0,0,0,.04);
    --shadow:         0 4px 12px rgba(0,0,0,.06);
    --shadow-lg:      0 10px 30px rgba(0,0,0,.08);

    --font:           -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

/* ── Reset & base ──────────────────────────────────────────────── */
* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    font-family: var(--font);
    background: var(--body-bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

/* ── Layout con sidebar ───────────────────────────────────────── */
.layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
    transition: transform .3s;
}

.sidebar__brand {
    padding: 22px 24px;
    font-weight: 700;
    font-size: 18px;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid rgba(255,255,255,.06);
}

.sidebar__brand-icon {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px;
}

.sidebar__nav {
    flex: 1;
    padding: 12px 0;
    overflow-y: auto;
}

.sidebar__section-title {
    padding: 16px 24px 8px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: #64748b;
    font-weight: 600;
}

.sidebar__item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 24px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 14px;
    transition: all .15s;
    border-left: 3px solid transparent;
}

.sidebar__item:hover {
    background: var(--sidebar-hover);
    color: #fff;
}

.sidebar__item.active {
    background: var(--sidebar-hover);
    color: #fff;
    border-left-color: var(--primary);
}

.sidebar__item i {
    width: 18px; text-align: center; font-size: 15px;
}

.sidebar__footer {
    padding: 16px 24px;
    border-top: 1px solid rgba(255,255,255,.06);
    font-size: 12px;
    color: #64748b;
}

/* ── Main area ────────────────────────────────────────────────── */
.main {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-width: 0;
}

/* ── Topbar ───────────────────────────────────────────────────── */
.topbar {
    height: var(--topbar-height);
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 28px;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar__title {
    font-weight: 600;
    font-size: 16px;
    flex: 1;
}

.topbar__mobile-toggle {
    display: none;
    background: none; border: none;
    font-size: 22px; cursor: pointer;
    color: var(--text);
}

.topbar__user {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 14px;
    background: var(--body-bg);
    border-radius: 999px;
    cursor: pointer;
    transition: background .15s;
}
.topbar__user:hover { background: var(--primary-light); }

.topbar__avatar {
    width: 32px; height: 32px;
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    border-radius: 50%;
    color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 600; font-size: 13px;
}

.topbar__user-info { line-height: 1.2; }
.topbar__user-name { font-weight: 600; font-size: 13px; }
.topbar__user-role { font-size: 11px; color: var(--text-muted); }

/* ── Content area ─────────────────────────────────────────────── */
.content {
    padding: 28px;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.page-header h1 {
    font-size: 22px;
    font-weight: 700;
    margin: 0;
}

.page-header p {
    color: var(--text-muted);
    margin: 4px 0 0;
}

/* ── Cards de métricas ────────────────────────────────────────── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    transition: transform .15s, box-shadow .15s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.stat-card__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.stat-card__label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: .5px;
}

.stat-card__icon {
    width: 40px; height: 40px;
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px;
}

.stat-card__value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text);
    line-height: 1.1;
}

.stat-card__change {
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-muted);
}

.stat-card__change.up    { color: var(--success); }
.stat-card__change.down  { color: var(--danger); }

.stat-card--primary .stat-card__icon { background: var(--primary-light); color: var(--primary); }
.stat-card--success .stat-card__icon { background: var(--success-light); color: var(--success); }
.stat-card--warning .stat-card__icon { background: var(--warning-light); color: var(--warning); }
.stat-card--danger  .stat-card__icon { background: var(--danger-light);  color: var(--danger); }
.stat-card--info    .stat-card__icon { background: var(--info-light);    color: var(--info); }

/* ── Card genérico ────────────────────────────────────────────── */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
}

.card__header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card__title { font-weight: 600; font-size: 15px; margin: 0; }
.card__body  { padding: 20px; }
.card__footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    background: var(--body-bg);
    border-radius: 0 0 var(--radius) var(--radius);
}

/* ── Tabla ────────────────────────────────────────────────────── */
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.table th, .table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.table th {
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: .5px;
    background: var(--body-bg);
}

.table tbody tr:hover {
    background: var(--body-bg);
}

.table tbody tr:last-child td { border-bottom: none; }

/* ── Badges ───────────────────────────────────────────────────── */
.badge {
    display: inline-block;
    padding: 3px 10px;
    font-size: 11px;
    font-weight: 600;
    border-radius: 999px;
    text-transform: uppercase;
    letter-spacing: .3px;
}

.badge--success  { background: var(--success-light); color: var(--success); }
.badge--warning  { background: var(--warning-light); color: var(--warning); }
.badge--danger   { background: var(--danger-light);  color: var(--danger); }
.badge--info     { background: var(--info-light);    color: var(--info); }
.badge--neutral  { background: #e2e8f0;              color: var(--secondary); }

/* ── Formularios ──────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }

.form-label {
    display: block;
    font-weight: 500;
    font-size: 13px;
    margin-bottom: 6px;
    color: var(--text);
}

.form-control {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: var(--font);
    background: #fff;
    transition: border .15s, box-shadow .15s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, .12);
}

select.form-control {
    cursor: pointer;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12"><path fill="%2364748b" d="M6 8L2 4h8z"/></svg>');
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
    appearance: none;
}

/* ── Botones ──────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all .15s;
    text-decoration: none;
    font-family: var(--font);
}

.btn--primary { background: var(--primary); color: #fff; }
.btn--primary:hover { background: var(--primary-dark); color: #fff; }

.btn--secondary {
    background: #fff; color: var(--text);
    border-color: var(--border);
}
.btn--secondary:hover { background: var(--body-bg); }

.btn--danger  { background: var(--danger);  color: #fff; }
.btn--danger:hover  { background: #dc2626; color: #fff; }

.btn--success { background: var(--success); color: #fff; }
.btn--success:hover { background: #059669; color: #fff; }

.btn--sm { padding: 5px 10px; font-size: 12px; }

/* ── Filtros ──────────────────────────────────────────────────── */
.filters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    padding: 16px 20px;
    background: var(--body-bg);
    border-bottom: 1px solid var(--border);
}

/* ── Alertas ──────────────────────────────────────────────────── */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    border: 1px solid transparent;
    font-size: 13px;
}
.alert--danger  { background: var(--danger-light);  color: #991b1b; border-color: #fecaca; }
.alert--success { background: var(--success-light); color: #065f46; border-color: #a7f3d0; }
.alert--warning { background: var(--warning-light); color: #92400e; border-color: #fde68a; }
.alert--info    { background: var(--info-light);    color: #1e40af; border-color: #bfdbfe; }

/* ── Paginación ───────────────────────────────────────────────── */
.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.pagination__info { color: var(--text-muted); font-size: 13px; }

.pagination__pages { display: flex; gap: 4px; }

.pagination__btn {
    padding: 6px 10px;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    color: var(--text);
}

.pagination__btn:hover:not(:disabled)   { background: var(--primary-light); border-color: var(--primary); }
.pagination__btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination__btn:disabled { opacity: .5; cursor: not-allowed; }

/* ── Spinner ──────────────────────────────────────────────────── */
.spinner {
    width: 36px; height: 36px;
    border: 3px solid var(--primary-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin .8s linear infinite;
    margin: 24px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-overlay {
    display: none;
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
}

/* ── Empty state ──────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--text-muted);
}
.empty-state i { font-size: 36px; opacity: .4; margin-bottom: 12px; }
.empty-state p { margin: 0; font-size: 14px; }

/* ── Modal ────────────────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, .5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 200;
    animation: fadeIn .15s;
}
.modal-overlay.active { display: flex; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 520px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: slideUp .2s;
}
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.modal__header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.modal__title { font-weight: 600; font-size: 16px; margin: 0; }
.modal__close {
    background: none; border: none; cursor: pointer;
    font-size: 20px; color: var(--text-muted);
}
.modal__body { padding: 20px; overflow-y: auto; flex: 1; }
.modal__footer {
    padding: 14px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ── Toast ────────────────────────────────────────────────────── */
.toast-container {
    position: fixed;
    top: 20px; right: 20px;
    z-index: 500;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: #fff;
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    padding: 14px 18px;
    min-width: 280px;
    max-width: 380px;
    animation: slideIn .2s;
    font-size: 13px;
}
@keyframes slideIn { from { transform: translateX(100%); } to { transform: translateX(0); } }

.toast--success { border-left-color: var(--success); }
.toast--danger  { border-left-color: var(--danger); }
.toast--warning { border-left-color: var(--warning); }

.toast__title { font-weight: 600; margin-bottom: 2px; }
.toast__msg   { color: var(--text-muted); }

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 900px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main { margin-left: 0; }
    .topbar__mobile-toggle { display: block; }
    .content { padding: 16px; }
}

@media (max-width: 600px) {
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .stat-card__value { font-size: 22px; }
    .table { font-size: 12px; }
    .table th, .table td { padding: 10px 8px; }
}