/* =========================================
   1. CSS Variables & Design Tokens
   ========================================= */
:root {
    /* Colors - Vibrant Gradient Palette */
    --primary-hue: 250;
    --primary-color: hsl(var(--primary-hue), 70%, 60%);
    --primary-glow: hsl(var(--primary-hue), 70%, 60%, 0.4);

    --accent-color: #00d4ff;
    --accent-glow: rgba(0, 212, 255, 0.4);

    --danger-color: #ff4757;
    --success-color: #2ed573;
    --warning-color: #ffa502;

    /* Backgrounds */
    --bg-dark: #0f0c29;
    --bg-gradient: linear-gradient(135deg, #0f0c29, #302b63, #24243e);

    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-bg-hover: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --glass-blur: 12px;

    /* Text */
    --text-main: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.7);

    /* Spacing */
    --spacing-xs: 0.5rem;
    /* 8px */
    --spacing-sm: 1rem;
    /* 16px */
    --spacing-md: 1.5rem;
    /* 24px */
    --spacing-lg: 2rem;
    /* 32px */
    --spacing-xl: 3rem;
    /* 48px */

    /* Typography */
    --font-family: 'Outfit', sans-serif;
}

/* =========================================
   2. Reset & Base Styles
   ========================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background: var(--bg-dark);
    /* Fallback */
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* =========================================
   3. Background Mesh Animation
   ========================================= */
.background-mesh {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    background: var(--bg-gradient);
    pointer-events: none;
    /* Ensure it doesn't block clicks */
}

.mesh-1,
.mesh-2,
.mesh-3 {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: drift 20s infinite alternate;
}

.mesh-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary-color), transparent);
    top: -100px;
    left: -100px;
}

.mesh-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--accent-color), transparent);
    bottom: -100px;
    right: -100px;
    animation-delay: -5s;
}

.mesh-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #ff00cc, transparent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: drift 25s infinite alternate-reverse;
}

@keyframes drift {
    0% {
        transform: translate(0, 0) rotate(0deg);
    }

    100% {
        transform: translate(100px, 50px) rotate(20deg);
    }
}

/* =========================================
   4. Layout Structure
   ========================================= */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: relative;
    /* Create stacking context */
    z-index: 1;
    /* Ensure above background */
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    margin-bottom: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 2rem;
}

/* Navigation */
.main-nav {
    display: flex;
    gap: var(--spacing-xs);
    background: rgba(255, 255, 255, 0.05);
    padding: 6px;
    border-radius: 100px;
    border: 1px solid var(--glass-border);
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.nav-btn .icon {
    font-size: 1.1rem;
}

.nav-btn:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

.nav-btn.active {
    background: var(--primary-color);
    color: #fff;
    box-shadow: 0 4px 15px var(--primary-glow);
}

/* Main Content Area */
.content-area {
    flex: 1;
    position: relative;
}

.view-section {
    display: none;
    animation: fadeScale 0.4s ease-out;
    height: 100%;
}

.view-section.active {
    display: block;
}

@keyframes fadeScale {
    from {
        opacity: 0;
        transform: scale(0.98);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* =========================================
   5. Glass Cards & Components
   ========================================= */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: 20px;
    padding: var(--spacing-lg);
    overflow: hidden;
}

/* Main Roll Call Display */
.main-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    min-height: 500px;
    text-align: center;
}

.roll-display-area {
    margin-bottom: var(--spacing-xl);
}

.status-badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: 600;
}

.result-box {
    min-height: 1.2em;
    /* Prevent layout shift */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.result-box .name {
    font-size: 5rem;
    font-weight: 800;
    line-height: 1.1;
    background: linear-gradient(180deg, #fff, #bbb);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    /* Ensure text aligns if it wraps */
    text-align: center;
}

.result-box .seat {
    font-size: 2rem;
    font-weight: 500;
    color: var(--accent-color);
    text-shadow: 0 0 15px var(--accent-glow);
    letter-spacing: 1px;
}

.placeholder-text {
    font-size: 2rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* Action Button */
.action-btn {
    position: relative;
    border: none;
    background: transparent;
    padding: 0;
    cursor: pointer;
    outline: none;
}

/* .primary-btn {
    Custom button styles placeholder
} */

.primary-btn .btn-text {
    display: block;
    padding: 1.2rem 3rem;
    background: var(--primary-color);
    color: #fff;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 100px;
    position: relative;
    z-index: 2;
    transition: transform 0.2s;
}

.primary-btn .btn-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    filter: blur(20px);
    opacity: 0.5;
    border-radius: 100px;
    z-index: 1;
    transition: opacity 0.3s;
    pointer-events: none;
    /* Don't intercept clicks */
}

.primary-btn:hover .btn-text {
    transform: scale(1.05);
}

.primary-btn:hover .btn-bg {
    opacity: 0.8;
}

.primary-btn:active .btn-text {
    transform: scale(0.95);
}

/* Animations - Disabled pulse to prevent click issues */
.pulse-glow {
    /* animation: pulse 2s infinite; */
    /* Pulse animation disabled - can interfere with click detection */
}

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

    50% {
        transform: scale(1.02);
    }

    100% {
        transform: scale(1);
    }
}

/* Ensure button is always clickable */
.action-btn {
    position: relative;
    border: none;
    background: transparent;
    padding: 0;
    cursor: pointer;
    outline: none;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

/* Student Info Meta */
.student-meta {
    margin-top: var(--spacing-lg);
    font-size: 1.2rem;
    color: var(--text-muted);
    height: 20px;
}

.fade-in {
    opacity: 0;
    animation: fadeIn 0.5s forwards;
}

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

/* =========================================
   6. Table & Management Styles
   ========================================= */
.table-card {
    padding: 0;
    /* Remove padding for edge-to-edge table */
    display: flex;
    flex-direction: column;
    height: calc(100vh - 200px);
}

.card-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.badge {
    background: var(--primary-color);
    font-size: 0.8rem;
    padding: 2px 8px;
    border-radius: 12px;
    vertical-align: middle;
}

.header-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.icon-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.icon-btn.danger {
    background: rgba(255, 71, 87, 0.2);
    border-color: rgba(255, 71, 87, 0.5);
    color: #ffbdc3;
}

.icon-btn.danger:hover {
    background: var(--danger-color);
    color: white;
}

.table-container {
    flex: 1;
    overflow-y: auto;
}

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

.modern-table th {
    background: rgba(0, 0, 0, 0.2);
    padding: var(--spacing-sm);
    text-align: center;
    font-weight: 600;
    color: var(--text-muted);
    position: sticky;
    top: 0;
}

.modern-table td {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--glass-border);
    text-align: center;
}

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

.empty-state {
    text-align: center;
    padding: var(--spacing-xl) 0;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--spacing-xs);
    opacity: 0.5;
}

/* =========================================
   7. Modals
   ========================================= */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 10000;
    display: none;
    /* Hidden by default */
    justify-content: center;
    align-items: center;
}

.glass-modal {
    background: #24243e;
    /* Solid bg fallback for modal readability */
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: var(--spacing-lg);
    width: 90%;
    max-width: 400px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    transform: scale(0.9);
    opacity: 0;
    transition: all 0.3s ease;
}

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

.modal-overlay.active .glass-modal {
    transform: scale(1);
    opacity: 1;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.close-modal {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 0.8rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: white;
    font-family: inherit;
    outline: none;
}

.form-group input:focus {
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.1);
}

.full-width {
    width: 100%;
}

/* =========================================
   8. Stats Page
   ========================================= */
.stats-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
}

.stat-icon.purple {
    background: rgba(108, 92, 231, 0.2);
    color: #a29bfe;
}

.stat-icon.blue {
    background: rgba(9, 132, 227, 0.2);
    color: #74b9ff;
}

.stat-icon.pink {
    background: rgba(225, 112, 85, 0.2);
    color: #fab1a0;
}

.stat-info h3 {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
}

.chart-card {
    height: calc(100vh - 400px);
    display: flex;
    flex-direction: column;
}

.stats-grid-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--spacing-sm);
    align-content: start;
}

/* Individual student stat card */
.stat-item-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: var(--spacing-sm);
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: transform 0.2s, background 0.2s;
}

.stat-item-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

.stat-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.stat-seat {
    opacity: 0.8;
}

.stat-call-count {
    background: var(--primary-color);
    padding: 2px 10px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.8rem;
    color: #fff;
}

.stat-item-body {
    text-align: center;
    padding: 8px 0;
}

.stat-name {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-main);
}

.stat-item-footer {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    border-top: 1px solid var(--glass-border);
    padding-top: 8px;
}

.stat-last-call {
    opacity: 0.7;
}

.stat-student-box {
    background: rgba(255, 255, 255, 0.05);
    padding: 10px;
    border-radius: 8px;
    text-align: center;
}

.sm-btn {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    padding: 4px 12px;
    border-radius: 6px;
    cursor: pointer;
}

.sm-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.danger-text {
    color: var(--danger-color);
    border-color: rgba(255, 71, 87, 0.3);
}

/* Search Input */
.search-input {
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.85rem;
    outline: none;
    width: 180px;
    transition: all 0.2s;
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-input:focus {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--primary-color);
    width: 220px;
}

/* Responsive */
@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .nav-btn span:not(.icon) {
        display: none;
        /* Hide text on small screens */
    }

    .nav-btn {
        padding: 0.8rem;
    }

    .result-box {
        font-size: 3rem;
    }

    /* 统计页面移动端优化 */
    .stats-overview {
        grid-template-columns: 1fr;
        /* 概览卡片单列显示 */
        gap: var(--spacing-sm);
    }

    .stat-item {
        padding: var(--spacing-sm);
    }

    /* 详细记录卡片头部优化 */
    .chart-card .card-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-sm);
    }

    .chart-card .card-header h2 {
        font-size: 1.2rem;
        text-align: center;
    }

    .chart-card .header-actions {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 6px;
        justify-content: flex-end;
    }

    .chart-card .search-input {
        width: 120px;
        padding: 4px 10px;
        font-size: 0.8rem;
    }

    .chart-card .search-input:focus {
        width: 140px;
    }

    .chart-card .header-actions .sm-btn {
        padding: 4px 10px;
        font-size: 0.75rem;
        white-space: nowrap;
    }

    /* 详细记录卡片网格优化 - 单列显示 */
    .stats-grid-container {
        grid-template-columns: 1fr;
        padding: var(--spacing-sm);
        gap: var(--spacing-sm);
    }

    /* 单个学生统计卡片优化 */
    .stat-item-card {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        padding: var(--spacing-sm);
    }

    .stat-item-header {
        width: 100%;
        margin-bottom: 4px;
    }

    .stat-item-body {
        flex: 1;
        text-align: left;
        padding: 4px 0;
    }

    .stat-name {
        font-size: 1.1rem;
    }

    .stat-item-footer {
        width: 100%;
        text-align: left;
        padding-top: 6px;
    }

    /* 图表卡片高度自适应 */
    .chart-card {
        height: auto;
        min-height: 300px;
        max-height: calc(100vh - 280px);
    }
}

/* =========================================
   9. Utilities (Restored for JS)
   ========================================= */

/* Toasts */
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    padding: 12px 24px;
    border-radius: 50px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    font-weight: 500;
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 9999;
    color: #333;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast-success {
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.toast-error {
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

.toast-info {
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

/* Animations */
.rolling-fast {
    animation: shake 0.1s infinite;
}

@keyframes shake {
    0% {
        transform: translate(1px, 1px) rotate(0deg);
    }

    10% {
        transform: translate(-1px, -2px) rotate(-1deg);
    }

    20% {
        transform: translate(-3px, 0px) rotate(1deg);
    }

    30% {
        transform: translate(3px, 2px) rotate(0deg);
    }

    40% {
        transform: translate(1px, -1px) rotate(1deg);
    }

    50% {
        transform: translate(-1px, 2px) rotate(-1deg);
    }

    60% {
        transform: translate(-3px, 1px) rotate(0deg);
    }

    70% {
        transform: translate(3px, 1px) rotate(-1deg);
    }

    80% {
        transform: translate(-1px, -1px) rotate(1deg);
    }

    90% {
        transform: translate(1px, 2px) rotate(0deg);
    }

    100% {
        transform: translate(1px, -2px) rotate(-1deg);
    }
}

.flip-in {
    animation: flipIn 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

@keyframes flipIn {
    0% {
        transform: rotateX(-90deg) scale(0.5);
        opacity: 0;
    }

    70% {
        transform: rotateX(20deg) scale(1.1);
        opacity: 0.8;
    }

    100% {
        transform: rotateX(0deg) scale(1);
        opacity: 1;
    }
}

/* Particles */
.particle {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    pointer-events: none;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    animation: explode 1s forwards;
    box-shadow: 0 0 10px currentColor;
    /* Add glow */
}

@keyframes explode {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }

    100% {
        transform: translate(calc(-50% + var(--tx)), calc(-50% + var(--ty))) scale(0);
        opacity: 0;
    }
}

/* Confirmation Modal (动态创建的确认弹窗) */
.confirm-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 10000;
    display: flex;
    justify-content: center;
    align-items: center;
}

.confirm-content {
    background: #24243e;
    /* Dark theme */
    color: #fff;
    padding: 24px;
    border-radius: 16px;
    max-width: 400px;
    width: 90%;
    border: 1px solid var(--glass-border);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    transform: scale(1);
    opacity: 1;
}

.modal-buttons {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
}

.btn {
    padding: 8px 16px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 500;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

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

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

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