/* =============================================
   ATGmed - Panel de Gestión
   Diseño oscuro profesional
   ============================================= */

/* ─── VARIABLES ─── */
:root {
    --bg: #0c0d12;
    --bg-alt: #111219;
    --surface: #16171f;
    --surface-hover: #1c1d28;
    --surface-active: #22232f;
    --border: #2a2c3a;
    --border-light: #353749;
    --text: #e8e9ed;
    --text-secondary: #a0a3b5;
    --text-muted: #6b6e82;
    --accent: #6c8aff;
    --accent-hover: #5a7aff;
    --accent-glow: rgba(108, 138, 255, 0.15);
    --accent-soft: rgba(108, 138, 255, 0.08);
    --success: #4ade80;
    --success-soft: rgba(74, 222, 128, 0.1);
    --warning: #fbbf24;
    --warning-soft: rgba(251, 191, 36, 0.1);
    --danger: #f87171;
    --danger-soft: rgba(248, 113, 113, 0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --transition: 0.2s ease;
    --sidebar-width: 260px;
    --topbar-height: 60px;
    --font: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Fraunces', Georgia, serif;
}

/* ─── RESET ─── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    font-size: 14px;
    line-height: 1.5;
}

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

/* ─── LOGIN ─── */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg);
    position: relative;
}

.login-wrapper::before {
    content: '';
    position: absolute;
    top: -20%; left: -5%;
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(108,138,255,0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.login-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 48px 40px;
    width: 400px;
    max-width: 92vw;
    text-align: center;
    position: relative;
    animation: fadeUp 0.6s ease;
}

.login-logo {
    width: 56px; height: 56px;
    background: linear-gradient(135deg, var(--accent), #a78bfa);
    border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 24px;
    font-weight: 700;
    font-size: 20px;
    color: #fff;
    letter-spacing: -0.5px;
}

.login-card h1 {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
}

.login-card .subtitle {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 32px;
}

/* ─── FORMULARIOS ─── */
.form-group {
    margin-bottom: 18px;
    text-align: left;
}

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

.form-control {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--font);
    font-size: 14px;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-control::placeholder { color: var(--text-muted); }

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236b6e82' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
}

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

/* ─── BOTONES ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    line-height: 1;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(108,138,255,0.3);
    color: #fff;
}

.btn-secondary {
    background: var(--surface-hover);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--surface-active);
    color: var(--text);
}

.btn-success {
    background: var(--success);
    color: #0c0d12;
}

.btn-success:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.btn-danger {
    background: var(--danger-soft);
    color: var(--danger);
    border: 1px solid rgba(248,113,113,0.2);
}

.btn-danger:hover {
    background: rgba(248,113,113,0.15);
}

.btn-sm {
    padding: 6px 14px;
    font-size: 13px;
}

.btn-block {
    width: 100%;
}

/* ─── LAYOUT PRINCIPAL ─── */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* ─── SIDEBAR ─── */
.sidebar {
    width: var(--sidebar-width);
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 200;
    transition: transform 0.3s ease;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.sidebar-brand-logo {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--accent), #a78bfa);
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700;
    font-size: 15px;
    color: #fff;
    flex-shrink: 0;
}

.sidebar-brand-text {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 600;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
}

.sidebar-section {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    padding: 12px 12px 8px;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition);
    margin-bottom: 2px;
}

.sidebar-link:hover {
    background: var(--surface-hover);
    color: var(--text);
}

.sidebar-link.active {
    background: var(--accent-soft);
    color: var(--accent);
}

.sidebar-link .icon {
    font-size: 18px;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 16px 12px;
    border-top: 1px solid var(--border);
}

/* ─── CONTENIDO PRINCIPAL ─── */
.main-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ─── TOPBAR ─── */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    height: var(--topbar-height);
    border-bottom: 1px solid var(--border);
    background: var(--bg-alt);
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.topbar-title {
    font-size: 16px;
    font-weight: 600;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

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

.btn-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 22px;
    cursor: pointer;
    padding: 4px;
}

/* ─── CONTENIDO ─── */
.content {
    flex: 1;
    padding: 32px;
    max-width: 1200px;
    width: 100%;
}

/* ─── TARJETAS DE RESUMEN ─── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    transition: all var(--transition);
}

.stat-card:hover {
    border-color: var(--border-light);
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 26px;
    font-weight: 700;
}

.stat-value .unit {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-muted);
    margin-left: 4px;
}

/* ─── TABLAS ─── */
.table-wrapper {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.table-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px;
    border-bottom: 1px solid var(--border);
}

.table-header h3 {
    font-size: 16px;
    font-weight: 600;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th {
    text-align: left;
    padding: 12px 22px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-alt);
}

table td {
    padding: 14px 22px;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
}

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

table tr:hover td {
    background: var(--surface-hover);
}

/* ─── BADGES ─── */
.badge {
    display: inline-block;
    padding: 3px 10px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
}

.badge-success {
    background: var(--success-soft);
    color: var(--success);
}

.badge-warning {
    background: var(--warning-soft);
    color: var(--warning);
}

.badge-danger {
    background: var(--danger-soft);
    color: var(--danger);
}

/* ─── ALERTAS ─── */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    margin-bottom: 20px;
}

.alert-error {
    background: var(--danger-soft);
    color: var(--danger);
    border: 1px solid rgba(248,113,113,0.2);
}

.alert-success {
    background: var(--success-soft);
    color: var(--success);
    border: 1px solid rgba(74,222,128,0.2);
}

.alert-warning {
    background: var(--warning-soft);
    color: var(--warning);
    border: 1px solid rgba(251,191,36,0.2);
}

/* ─── CARDS ─── */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

/* ─── ANIMACIONES ─── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeUp 0.4s ease;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-wrapper {
        margin-left: 0;
    }
    
    .btn-menu-toggle {
        display: block;
    }
    
    .content {
        padding: 20px 16px;
    }
    
    .topbar {
        padding: 0 16px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        background: rgba(0,0,0,0.5);
        z-index: 199;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
}