:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #e0e7ff;
    --accent: #06b6d4;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --border-color: #334155;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-glow: 0 0 25px rgba(79, 70, 229, 0.25);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navbar */
.navbar {
    background: rgba(30, 41, 59, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 0.85rem 1.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: #fff;
    font-weight: 700;
    font-size: 1.25rem;
}

.brand-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.15rem;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1rem;
    list-style: none;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link:hover, .nav-link.active {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
}

/* App Container */
.container {
    max-width: 1320px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    flex: 1;
    width: 100%;
}

/* Cards & Grid */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-cols-4 {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid-cols-3 {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.grid-cols-2 {
    grid-template-columns: 2fr 1fr;
}

@media (max-width: 900px) {
    .grid-cols-2 {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    border-color: rgba(79, 70, 229, 0.4);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.card-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Hero / Bell Clock Card */
.bell-clock-card {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.25), rgba(6, 182, 212, 0.15)), var(--bg-card);
    border: 1px solid rgba(99, 102, 241, 0.35);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.clock-time {
    font-size: 3.25rem;
    font-weight: 800;
    letter-spacing: 2px;
    background: linear-gradient(to right, #fff, #a5b4fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-variant-numeric: tabular-nums;
}

.countdown-box {
    margin-top: 1rem;
    background: rgba(0, 0, 0, 0.35);
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 0.5rem 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.countdown-digits {
    font-weight: 700;
    color: var(--accent);
    font-size: 1.2rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #6366f1);
    color: white;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover), var(--primary));
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, #059669, #10b981);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, #dc2626, #ef4444);
    color: white;
}

.btn-warning {
    background: linear-gradient(135deg, #d97706, #f59e0b);
    color: #1e293b;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.08);
}

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.85rem;
}

/* Timeline & Bells */
.timeline {
    position: relative;
    padding-left: 28px;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 10px;
    bottom: 10px;
    left: 8px;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 1.25rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: var(--radius-md);
    padding: 0.9rem 1.15rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.timeline-item.active-period {
    background: rgba(79, 70, 229, 0.15);
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.timeline-dot {
    position: absolute;
    left: -28px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--border-color);
    border: 3px solid var(--bg-card);
}

.timeline-item.active-period .timeline-dot {
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary { background: rgba(79, 70, 229, 0.2); color: #a5b4fc; border: 1px solid rgba(79, 70, 229, 0.3); }
.badge-success { background: rgba(16, 185, 129, 0.2); color: #6ee7b7; border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-warning { background: rgba(245, 158, 11, 0.2); color: #fcd34d; border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-danger { background: rgba(239, 68, 68, 0.2); color: #fca5a5; border: 1px solid rgba(239, 68, 68, 0.3); }

/* Form Elements */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: #fff;
    font-size: 0.95rem;
    transition: border 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.25);
}

/* Modals */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(6px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 540px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    animation: modalPop 0.25s ease-out;
}

@keyframes modalPop {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

/* Alerts / Flash */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-success { background: rgba(16, 185, 129, 0.15); border: 1px solid #10b981; color: #6ee7b7; }
.alert-error { background: rgba(239, 68, 68, 0.15); border: 1px solid #ef4444; color: #fca5a5; }

/* Table */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.table th, .table td {
    padding: 0.9rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}