:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: #16213e;
    --accent: #0f3460;
    --accent-hover: #533483;
    --text-primary: #e0e0e0;
    --text-muted: #888;
    --success: #4CAF50;
    --warning: #FF9800;
    --danger: #f44336;
    --info: #2196F3;
    --border: #2a2a4a;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

/* Navbar */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 0 2rem;
    display: flex;
    align-items: center;
    height: 60px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
}

.navbar .logo {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--info);
    margin-right: 2rem;
    cursor: pointer;
}

.navbar .logo span { color: var(--text-muted); font-size: 0.75rem; font-weight: 400; display: block; margin-top: -4px; }

.nav-links { display: flex; gap: 0.5rem; flex: 1; }

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.2s;
    font-size: 0.9rem;
    position: relative;
}

.nav-links a:hover, .nav-links a.active { color: var(--text-primary); background: var(--accent); }

.nav-links .badge-count {
    background: var(--danger);
    color: #fff;
    font-size: 0.65rem;
    padding: 1px 6px;
    border-radius: 10px;
    position: absolute;
    top: 2px;
    right: -4px;
}

.nav-right { display: flex; align-items: center; gap: 1rem; }

.btn-logout {
    background: transparent;
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 0.4rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
}

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

/* Main content */
.main-content {
    padding: 80px 2rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

/* Cards */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.2rem;
    margin-bottom: 2rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: transform 0.2s;
}

.card:hover { transform: translateY(-2px); }

.card .card-label { color: var(--text-muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 0.5rem; }
.card .card-value { font-size: 2rem; font-weight: 700; }
.card .card-value.warning { color: var(--warning); }
.card .card-value.danger { color: var(--danger); }
.card .card-value.success { color: var(--success); }

/* Tables */
.table-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 2rem;
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 0.5rem;
}

.table-header h2 { font-size: 1.1rem; font-weight: 600; }

.table-filters { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }

.table-filters input,
.table-filters select {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    font-size: 0.85rem;
    outline: none;
}

.table-filters input:focus,
.table-filters select:focus { border-color: var(--info); }

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

thead th {
    text-align: left;
    padding: 0.8rem 1rem;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

tbody tr { transition: background 0.15s; cursor: pointer; }
tbody tr:hover { background: rgba(33,150,243,0.05); }

tbody td {
    padding: 0.7rem 1rem;
    font-size: 0.9rem;
    border-bottom: 1px solid rgba(42,42,74,0.5);
    white-space: nowrap;
}

/* Badges */
.badge {
    padding: 0.2rem 0.7rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    display: inline-block;
}

.badge-activa { background: rgba(76,175,80,0.15); color: var(--success); }
.badge-pendiente { background: rgba(33,150,243,0.15); color: var(--info); }
.badge-expira_pronto { background: rgba(255,152,0,0.15); color: var(--warning); }
.badge-cancelada { background: rgba(244,67,54,0.15); color: var(--danger); }
.badge-aprobada { background: rgba(76,175,80,0.15); color: var(--success); }
.badge-rechazada { background: rgba(244,67,54,0.15); color: var(--danger); }
.badge-ejecutada { background: rgba(33,150,243,0.15); color: var(--info); }

.badge-nuevo_cliente { background: rgba(33,150,243,0.15); color: var(--info); }
.badge-ampliar { background: rgba(76,175,80,0.15); color: var(--success); }
.badge-reducir { background: rgba(255,152,0,0.15); color: var(--warning); }
.badge-cancelar { background: rgba(244,67,54,0.15); color: var(--danger); }

.renovacion-warn { color: var(--warning); font-weight: 600; }

/* Buttons */
.btn {
    padding: 0.5rem 1.2rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.btn-primary { background: var(--info); color: #fff; }
.btn-primary:hover { background: #1976D2; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #388E3C; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #D32F2F; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover { background: #F57C00; }
.btn-sm { padding: 0.3rem 0.8rem; font-size: 0.78rem; }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text-primary); }
.btn-ghost:hover { border-color: var(--info); color: var(--info); }

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    z-index: 200;
    justify-content: center;
    align-items: flex-start;
    padding-top: 80px;
    overflow-y: auto;
}

.modal-overlay.active { display: flex; }

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    margin-bottom: 2rem;
}

.modal h2 { margin-bottom: 1.5rem; font-size: 1.2rem; }

.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.3rem; font-size: 0.85rem; color: var(--text-muted); }

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.6rem 0.8rem;
    border-radius: 8px;
    font-size: 0.9rem;
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--info); }

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

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.modal-actions { display: flex; justify-content: flex-end; gap: 0.5rem; margin-top: 1.5rem; }

/* Login */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 2rem;
}

.login-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 3rem;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
    text-align: center;
}

.login-box h1 { font-size: 2rem; color: var(--info); margin-bottom: 0.3rem; }
.login-box .subtitle { color: var(--text-muted); margin-bottom: 2rem; font-size: 0.9rem; }

.login-box .form-group { text-align: left; }

.login-box .btn { width: 100%; justify-content: center; padding: 0.7rem; font-size: 1rem; margin-top: 0.5rem; }

.login-error { color: var(--danger); font-size: 0.85rem; margin-top: 1rem; display: none; }

/* Sections */
.section { display: none; }
.section.active { display: block; }

.section-title { font-size: 1.3rem; font-weight: 600; margin-bottom: 1.2rem; }

/* Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-top-color: var(--info);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15,15,26,0.8);
    z-index: 300;
    justify-content: center;
    align-items: center;
}

.loading-overlay.active { display: flex; }
.loading-overlay .spinner { width: 40px; height: 40px; border-width: 3px; }

/* Responsive */
@media (max-width: 768px) {
    .navbar { padding: 0 1rem; flex-wrap: wrap; height: auto; min-height: 60px; }
    .nav-links { order: 3; width: 100%; overflow-x: auto; padding: 0.5rem 0; }
    .main-content { padding: 120px 1rem 1rem; }
    .cards-grid { grid-template-columns: repeat(2, 1fr); }
    .form-row { grid-template-columns: 1fr; }
    table { font-size: 0.8rem; }
    tbody td, thead th { padding: 0.5rem; }
    .table-header { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    .cards-grid { grid-template-columns: 1fr; }
    .modal { padding: 1.5rem; width: 95%; }
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem 1.5rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    z-index: 400;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s;
}

.toast.show { transform: translateY(0); opacity: 1; }
.toast.toast-success { border-left: 3px solid var(--success); }
.toast.toast-error { border-left: 3px solid var(--danger); }