/* Modern Academic Auto Bell CSS - Light Theme Style System */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@500;700;800&display=swap');

:root {
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-glow: rgba(37, 99, 235, 0.15);
    
    --accent-teal: #0d9488;
    --accent-indigo: #4f46e5;
    
    --status-active-bg: #ecfdf5;
    --status-active-text: #047857;
    --status-active-border: #10b981;
    
    --status-inactive-bg: #fef2f2;
    --status-inactive-text: #b91c1c;
    --status-inactive-border: #ef4444;

    --status-next-bg: #fffbeb;
    --status-next-text: #b45309;
    
    --border-color: #e2e8f0;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px 0 rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 15px rgba(37, 99, 235, 0.12);
}

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

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: inherit;
    text-decoration: none;
}

/* Header & Navbar */
.app-header {
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.brand-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.brand-icon {
    width: 46px;
    height: 46px;
    background: linear-gradient(135deg, var(--primary), var(--accent-indigo));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: #fff;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.brand-title {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

.brand-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

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

.nav-item {
    padding: 0.6rem 1.1rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-item:hover {
    color: var(--text-primary);
    background: var(--bg-card-hover);
}

.nav-item.active {
    color: #fff;
    background: var(--primary);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.header-status {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.9rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.status-badge.active {
    background: var(--status-active-bg);
    color: var(--status-active-text);
    border: 1px solid var(--status-active-border);
}

.status-badge.inactive {
    background: var(--status-inactive-bg);
    color: var(--status-inactive-text);
    border: 1px solid var(--status-inactive-border);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: currentColor;
    animation: pulse 1.8s infinite;
}

@keyframes pulse {
    0% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(1.2); }
    100% { opacity: 1; transform: scale(1); }
}

/* Main Container */
.main-content {
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
    flex: 1;
}

/* Grid Layouts */
.grid-top-dash {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

@media (max-width: 1024px) {
    .grid-top-dash {
        grid-template-columns: 1fr;
    }
}

.grid-three {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

@media (max-width: 1024px) {
    .grid-three {
        grid-template-columns: 1fr;
    }
}

/* Card Styling */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title .icon {
    color: var(--primary);
}

/* Realtime Clock Header Widget */
.clock-widget {
    background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
}

.clock-date-box {
    display: flex;
    flex-direction: column;
}

.clock-day {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--primary);
}

.clock-full-date {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.clock-digital {
    font-family: 'JetBrains Mono', monospace;
    font-size: 3rem;
    font-weight: 800;
    color: #0f172a;
    letter-spacing: 2px;
    background: #ffffff;
    padding: 0.25rem 1.25rem;
    border-radius: var(--radius-sm);
    border: 1px solid #cbd5e1;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.03);
}

/* Group Selection Radio Cards */
.group-selector-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.group-radio-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #f8fafc;
    border: 1px solid var(--border-color);
    padding: 0.85rem 1.2rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.group-radio-item:hover {
    border-color: var(--primary);
    background: #f1f5f9;
}

.group-radio-item.active {
    border-color: var(--primary);
    background: #eff6ff;
    box-shadow: var(--shadow-glow);
}

.group-radio-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.custom-radio {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.group-radio-item.active .custom-radio {
    border-color: var(--primary);
    background: var(--primary);
}

.group-radio-item.active .custom-radio::after {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #fff;
}

/* Next Bell Widget */
.next-bell-card {
    background: linear-gradient(135deg, #ffffff 0%, #f0fdf4 100%);
    border: 1px solid #bbf7d0;
    text-align: center;
    position: relative;
}

.next-bell-time {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.75rem;
    font-weight: 800;
    color: var(--accent-teal);
    margin: 0.5rem 0;
}

.next-bell-desc {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.countdown-box {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1.25rem;
    display: inline-block;
    box-shadow: var(--shadow-sm);
}

.countdown-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 700;
    letter-spacing: 1px;
}

.countdown-timer {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--status-next-text);
}

/* Manual Play Box */
.manual-play-controls {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

select.form-control, input.form-control {
    width: 100%;
    background: #ffffff;
    border: 1px solid #cbd5e1;
    border-radius: var(--radius-sm);
    padding: 0.65rem 1rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: all 0.2s ease;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
    outline: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-success {
    background: #10b981;
    color: #fff;
}
.btn-success:hover {
    background: #059669;
}

.btn-danger {
    background: #ef4444;
    color: #fff;
}
.btn-danger:hover {
    background: #dc2626;
}

.btn-secondary {
    background: #64748b;
    color: #fff;
}
.btn-secondary:hover {
    background: #475569;
}

/* Clean Modern Tables */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

table.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    background: var(--bg-card);
}

table.data-table th {
    background: #f1f5f9;
    padding: 0.9rem 1.2rem;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

table.data-table td {
    padding: 0.9rem 1.2rem;
    font-size: 0.95rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

table.data-table tbody tr:hover {
    background: #f8fafc;
}

table.data-table tr.highlight-next {
    background: #fffbeb;
    border-left: 4px solid #f59e0b;
}

table.data-table tr.highlight-done {
    opacity: 0.6;
    background: #f8fafc;
}

.badge {
    padding: 0.25rem 0.65rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    display: inline-block;
}

.badge-success { background: #dcfce7; color: #15803d; }
.badge-warning { background: #fef3c7; color: #b45309; }
.badge-secondary { background: #f1f5f9; color: #475569; }
.badge-primary { background: #dbeafe; color: #1d4ed8; }

/* Modals & Forms */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: all 0.2s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    width: 100%;
    max-width: 500px;
    padding: 1.75rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
}

.modal-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-row .form-group {
    flex: 1;
}

.footer-credits {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
    background: #ffffff;
}

/* Volume Slider */
.volume-slider-box {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}

.volume-slider-box input[type="range"] {
    flex: 1;
    accent-color: var(--primary);
    cursor: pointer;
}