/* ==========================================================================
   Design System & Root Variables
   ========================================================================== */
:root {
    /* Color Palette */
    --primary-hue: 222;
    --primary-color: hsl(var(--primary-hue), 85%, 56%);
    --primary-hover: hsl(var(--primary-hue), 85%, 48%);
    --primary-light: hsl(var(--primary-hue), 85%, 96%);
    
    --accent-call: hsl(152, 76%, 40%);
    --accent-call-hover: hsl(152, 76%, 33%);
    --accent-call-light: hsl(152, 76%, 95%);

    --bg-main: #f4f7fc;
    --bg-card: rgba(255, 255, 255, 0.85);
    --border-color: rgba(226, 232, 240, 0.8);

    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 24px rgba(149, 157, 165, 0.1);
    --shadow-lg: 0 16px 32px rgba(30, 41, 59, 0.12);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    --font-heading: 'Outfit', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-body: 'Plus Jakarta Sans', 'Segoe UI', system-ui, -apple-system, sans-serif;

    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Adjustments / Glassmorphism */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
}

body {
    font-family: var(--font-body);
    background: linear-gradient(135deg, #eef2f7 0%, #e0e8f5 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 20px;
    line-height: 1.5;
}

.app-container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
    overflow-x: hidden;
}

/* ==========================================================================
   Header Styling
   ========================================================================== */
.main-header {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-md);
}

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

.brand-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.school-logo {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.brand-text h1 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.brand-text p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.live-clock {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-admin {
    background: var(--text-primary);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-fast);
    box-shadow: 0 4px 12px rgba(30, 41, 59, 0.15);
}

.btn-admin:hover {
    background: #0f172a;
    transform: translateY(-1px);
}

/* ==========================================================================
   Live Call Announcement Banner
   ========================================================================== */
.announcement-banner {
    position: relative;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    border-radius: var(--radius-lg);
    padding: 20px 28px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 12px 28px rgba(16, 185, 129, 0.35);
    overflow: hidden;
    animation: slideDown 0.4s ease-out;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-15px); }
    to { opacity: 1; transform: translateY(0); }
}

.announcement-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(8px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    flex-shrink: 0;
}

.announcement-content {
    flex: 1;
}

.announcement-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    background: rgba(255, 255, 255, 0.25);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    display: inline-block;
    margin-bottom: 4px;
}

.announcement-name {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
    line-height: 1.2;
}

.announcement-details {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 4px;
}

.badge-class-announce {
    background: rgba(255, 255, 255, 0.9);
    color: #059669;
    font-weight: 700;
    font-size: 0.85rem;
    padding: 2px 10px;
    border-radius: var(--radius-sm);
}

.announce-time {
    font-size: 0.85rem;
    opacity: 0.9;
}

.btn-repeat {
    background: white;
    color: #059669;
    border: none;
    padding: 10px 18px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-fast);
}

.btn-repeat:hover {
    background: #f0fdf4;
    transform: scale(1.03);
}

/* ==========================================================================
   Main Layout Grid
   ========================================================================== */
.main-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 20px;
}

@media (max-width: 992px) {
    .main-layout {
        grid-template-columns: 1fr;
    }
}

/* Sidebar Class Filter */
.sidebar-classes {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-md);
    height: fit-content;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.class-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.btn-class {
    background: #ffffff;
    border: 1px solid var(--border-color);
    padding: 12px 6px;
    border-radius: var(--radius-md);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: center;
    position: relative;
}

.btn-class:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: var(--primary-light);
    transform: translateY(-2px);
}

.btn-class.active {
    background: linear-gradient(135deg, var(--primary-color), #2563eb);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-class .count-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: #ef4444;
    color: white;
    font-size: 0.65rem;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
}

/* Right Side Table Section */
.student-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.section-header {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    flex-wrap: wrap;
    gap: 12px;
}

.current-class-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.active-class-badge {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 800;
    background: var(--primary-light);
    color: var(--primary-color);
    padding: 4px 16px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.total-students-count {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
}

.search-box {
    position: relative;
    width: 260px;
}

.search-box i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    padding: 10px 14px 10px 38px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    background: white;
    font-family: var(--font-body);
    font-size: 0.88rem;
    outline: none;
    transition: var(--transition-fast);
}

.search-box input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

/* Student Table Styling */
.table-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.student-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.student-table th {
    background: rgba(241, 245, 249, 0.8);
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
}

.student-table td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
    color: var(--text-primary);
}

.student-table tbody tr {
    transition: var(--transition-fast);
}

.student-table tbody tr:hover {
    background: rgba(248, 250, 252, 0.8);
}

.student-table tbody tr.called-row {
    background: var(--accent-call-light);
}

.badge-status {
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 700;
    display: inline-block;
}

.status-waiting {
    background: #f1f5f9;
    color: var(--text-secondary);
}

.status-called {
    background: #dcfce7;
    color: #15803d;
}

/* Call Button */
.btn-call {
    background: linear-gradient(135deg, var(--accent-call), #059669);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-fast);
    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.25);
}

.btn-call:hover {
    background: linear-gradient(135deg, #059669, #047857);
    transform: translateY(-1px);
    box-shadow: 0 6px 14px rgba(16, 185, 129, 0.35);
}

.btn-call:active {
    transform: translateY(0);
}

.empty-state {
    padding: 60px 20px;
    text-align: center;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 3rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.empty-state p {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ==========================================================================
   Modals & Drawers
   ========================================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    padding: 20px;
    animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-card {
    background: white;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 440px;
    padding: 32px;
    position: relative;
    box-shadow: var(--shadow-lg);
    animation: scaleUp 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-large {
    max-width: 800px;
    padding: 32px;
}

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

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: #f1f5f9;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.modal-close:hover {
    background: #e2e8f0;
    color: var(--text-primary);
}

.modal-header {
    text-align: center;
    margin-bottom: 24px;
}

.modal-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-light);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 16px;
}

.modal-header h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
}

.modal-header p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Forms */
.form-group {
    margin-bottom: 18px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-primary);
}

.input-with-icon {
    position: relative;
}

.input-with-icon i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.input-with-icon input,
.form-group input,
.form-group textarea,
.form-select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition-fast);
}

.input-with-icon input {
    padding-left: 38px;
}

.input-with-icon input:focus,
.form-group input:focus,
.form-group textarea:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.btn-submit, .btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 12px;
    border-radius: var(--radius-md);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.95rem;
    width: 100%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition-fast);
}

.btn-submit:hover, .btn-primary:hover {
    background: var(--primary-hover);
}

.login-error {
    color: #ef4444;
    background: #fef2f2;
    border: 1px solid #fecaca;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    margin-bottom: 16px;
    text-align: center;
}

/* Admin Dashboard Modal Specifics */
.header-admin-dash {
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
}

.modal-title-group {
    display: flex;
    align-items: center;
    gap: 16px;
}

.admin-icon {
    margin: 0;
}

.btn-logout {
    background: #fee2e2;
    color: #dc2626;
    border: none;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
}

.btn-logout:hover {
    background: #fca5a5;
}

.admin-class-selector {
    background: #f8fafc;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.admin-class-selector label {
    font-weight: 700;
    font-size: 0.9rem;
    white-space: nowrap;
}

.admin-tabs {
    display: flex;
    gap: 8px;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 20px;
}

.tab-btn {
    background: none;
    border: none;
    padding: 10px 16px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition-fast);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 700;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.admin-table-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-weight: 700;
}

.btn-danger-outline {
    background: none;
    border: 1px solid #ef4444;
    color: #ef4444;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 700;
    cursor: pointer;
}

.btn-danger-outline:hover {
    background: #fef2f2;
}

.admin-table-wrapper {
    max-height: 320px;
    overflow-y: auto;
}

.btn-icon-edit, .btn-icon-delete {
    border: none;
    background: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-icon-edit {
    color: var(--primary-color);
}

.btn-icon-edit:hover {
    background: var(--primary-light);
}

.btn-icon-delete {
    color: #ef4444;
}

.btn-icon-delete:hover {
    background: #fee2e2;
}

.text-center {
    text-align: center;
}

.hidden {
    display: none !important;
}

/* ==========================================================================
   Sidebar Hint & Header Tools
   ========================================================================== */
.sidebar-hint {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    background: var(--primary-light);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    border: 1px dashed rgba(59, 130, 246, 0.3);
}

.header-right-tools {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.btn-open-class-modal {
    background: linear-gradient(135deg, var(--primary-color), #2563eb);
    color: white;
    border: none;
    padding: 9px 16px;
    border-radius: var(--radius-full);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-fast);
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2);
}

.btn-open-class-modal:hover {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    transform: translateY(-1px);
}

/* ==========================================================================
   Announcement Banner Enhancements
   ========================================================================== */
.announcement-top-tags {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.badge-repeat-count {
    background: #f59e0b;
    color: white;
    font-size: 0.75rem;
    font-weight: 800;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    box-shadow: 0 2px 6px rgba(245, 158, 11, 0.4);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.announcement-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-skip {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.4);
    padding: 10px 16px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-fast);
}

.btn-skip:hover {
    background: rgba(255, 255, 255, 0.35);
}

/* Delay Countdown Bar inside Banner */
.delay-countdown-bar {
    position: relative;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-full);
    height: 28px;
    margin-top: 10px;
    overflow: hidden;
    display: flex;
    align-items: center;
    padding: 0 12px;
}

.delay-progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 100%;
    background: linear-gradient(90deg, #f59e0b, #fbbf24);
    transition: width 0.1s linear;
    z-index: 1;
}

.delay-text {
    position: relative;
    z-index: 2;
    font-size: 0.8rem;
    font-weight: 700;
    color: #1e293b;
    width: 100%;
    text-align: center;
}

/* ==========================================================================
   Queue Card Section (Area Antrian Murid)
   ========================================================================== */
.queue-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    box-shadow: var(--shadow-md);
}

.queue-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.queue-title-group {
    display: flex;
    align-items: center;
    gap: 14px;
}

.queue-title-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.25);
}

.queue-title-group h2 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
}

.queue-title-group p {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.queue-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.badge-queue-count {
    background: var(--primary-light);
    color: var(--primary-color);
    font-weight: 800;
    font-size: 0.85rem;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.btn-queue-control {
    border: none;
    padding: 8px 14px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-fast);
}

.btn-pause {
    background: #fef3c7;
    color: #d97706;
}

.btn-pause:hover {
    background: #fde68a;
}

.btn-pause.is-paused {
    background: #dcfce7;
    color: #16a34a;
}

.btn-clear {
    background: #fee2e2;
    color: #dc2626;
}

.btn-clear:hover {
    background: #fca5a5;
}

/* Queue List Items */
.queue-list-wrapper {
    min-height: 80px;
}

.queue-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
}

.queue-item {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.queue-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.queue-item.is-calling {
    background: #f0fdf4;
    border-color: #10b981;
    border-left: 4px solid #10b981;
    animation: callingPulse 2s infinite;
}

@keyframes callingPulse {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
    70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.queue-item.is-delay {
    background: #fffbeb;
    border-color: #f59e0b;
    border-left: 4px solid #f59e0b;
}

.queue-item.is-waiting {
    border-left: 4px solid var(--primary-color);
}

.q-index {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1rem;
    color: var(--text-secondary);
    min-width: 24px;
}

.q-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.q-name {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-primary);
    line-height: 1.2;
}

.q-class {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.q-status {
    display: flex;
    align-items: center;
}

.q-badge {
    font-size: 0.72rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: var(--radius-full);
}

.q-badge-calling {
    background: #dcfce7;
    color: #15803d;
}

.q-badge-delay {
    background: #fef3c7;
    color: #b45309;
}

.q-badge-waiting {
    background: #f1f5f9;
    color: var(--text-secondary);
}

.q-btn-remove {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1rem;
    cursor: pointer;
    padding: 4px 6px;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.q-btn-remove:hover {
    color: #ef4444;
    background: #fee2e2;
}

.empty-queue-state {
    text-align: center;
    padding: 30px 20px;
    color: var(--text-secondary);
    background: #f8fafc;
    border-radius: var(--radius-md);
    border: 1px dashed var(--border-color);
}

.empty-queue-state i {
    font-size: 2rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.empty-queue-state p {
    font-weight: 700;
    color: var(--text-primary);
}

/* Status badge additions for student table */
.status-calling {
    background: #dcfce7;
    color: #15803d;
}

.status-delay {
    background: #fef3c7;
    color: #b45309;
}

.status-queued {
    background: #e0f2fe;
    color: #0369a1;
}

/* ==========================================================================
   Class Student Selection Modal Popup
   ========================================================================== */
.header-class-modal {
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
    margin-bottom: 16px;
    gap: 16px;
    flex-wrap: wrap;
}

.class-modal-icon {
    background: linear-gradient(135deg, var(--primary-color), #2563eb);
    color: white;
    margin: 0;
}

.class-modal-search {
    position: relative;
    width: 280px;
}

.class-modal-search i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.class-modal-search input {
    width: 100%;
    padding: 8px 14px 8px 38px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    font-size: 0.88rem;
    outline: none;
}

.class-modal-body {
    max-height: 380px;
    overflow-y: auto;
    padding-right: 4px;
}

.class-students-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
}

.class-student-card {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.class-student-card:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.class-student-card.in-queue {
    background: #f0fdf4;
    border-color: #86efac;
    cursor: default;
}

.card-student-info {
    display: flex;
    flex-direction: column;
}

.card-student-name {
    font-weight: 700;
    font-size: 0.92rem;
    color: var(--text-primary);
}

.card-student-class {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.btn-card-add {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.78rem;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition-fast);
}

.btn-card-add.added {
    background: #22c55e;
    color: white;
}

.class-modal-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
    margin-top: 16px;
}

.modal-student-count-info {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.btn-primary-outline {
    background: none;
    border: 1.5px solid var(--primary-color);
    color: var(--primary-color);
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.88rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-fast);
}

.btn-primary-outline:hover {
    background: var(--primary-light);
}

/* ==========================================================================
   Firebase Realtime Badge & Audio Mode Toggle
   ========================================================================== */
.firebase-status-badge {
    background: #f1f5f9;
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 6px;
    border: 1px solid var(--border-color);
}

.firebase-status-badge.online {
    background: #f0fdf4;
    color: #16a34a;
    border-color: #bbf7d0;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #16a34a;
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 0 2px rgba(22, 163, 74, 0.2);
}

.btn-audio-mode {
    background: #f1f5f9;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 8px 14px;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-fast);
}

.btn-audio-mode.active {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.25);
}

/* ==========================================================================
   Mobile Responsive Media Queries (Phones & Tablets)
   ========================================================================== */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .app-container {
        gap: 12px;
    }

    /* Main Header Mobile Fix */
    .main-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 14px 16px;
        gap: 14px;
    }

    .brand {
        flex-direction: column;
        gap: 8px;
    }

    .brand-text h1 {
        font-size: 1.2rem;
    }

    .brand-text p {
        font-size: 0.78rem;
    }

    .header-actions {
        width: 100%;
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
    }

    .live-clock, .btn-admin, .btn-audio-mode, .firebase-status-badge {
        padding: 6px 12px;
        font-size: 0.8rem;
    }

    /* Announcement Banner Mobile Fix */
    .announcement-banner {
        flex-direction: column;
        text-align: center;
        padding: 16px;
        gap: 12px;
    }

    .announcement-details {
        justify-content: center;
    }

    .announcement-name {
        font-size: 1.4rem;
    }

    .announcement-actions {
        width: 100%;
        justify-content: center;
    }

    /* Layout & Class Grid Mobile Fix */
    .main-layout {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .sidebar-classes {
        padding: 14px;
    }

    .class-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 6px;
    }

    .btn-class {
        padding: 10px 4px;
        font-size: 0.85rem;
    }

    /* Queue List Mobile Fix */
    .queue-card {
        padding: 14px;
    }

    .queue-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .queue-actions {
        width: 100%;
        justify-content: space-between;
        flex-wrap: wrap;
    }

    .queue-list {
        grid-template-columns: 1fr;
    }

    /* Class Modal Popup Mobile Fix */
    .modal-card {
        padding: 16px;
        max-width: 95vw;
    }

    .class-modal-search {
        width: 100%;
    }

    .class-students-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .class-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .btn-class {
        font-size: 0.8rem;
        padding: 8px 2px;
    }
}

/* Telegram Buttons */
.btn-telegram {
    background: #2AABEE !important;
    color: white !important;
    border: none !important;
}
.btn-telegram:hover {
    background: #229ED9 !important;
}
.btn-telegram-config {
    background: #f1f5f9 !important;
    color: #64748b !important;
    border: 1px solid #e2e8f0 !important;
    padding: 8px 10px !important;
    min-width: unset !important;
}
.btn-telegram-config:hover {
    background: #e2e8f0 !important;
    color: #334155 !important;
}

/* Telegram Config Panel */
.telegram-config-panel {
    background: #f0f4ff;
    border-top: 1px solid #dbeafe;
    border-bottom: 1px solid #dbeafe;
    padding: 14px 20px;
    transition: all 0.3s ease;
}
.telegram-config-panel.hidden {
    display: none;
}