/* CSS Variables for Theme Support */
:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #1e40af;
    --success-color: #22c55e;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --toast-success: #22c55e;
    --toast-error: #ef4444;
    --toast-info: #3b82f6;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --primary-color: #60a5fa;
    --primary-hover: #3b82f6;
    --background-color: #0f172a;
    --surface-color: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --border-light: #1e293b;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.2s ease, color 0.2s ease;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px;
}

/* Header Styles - Minimal */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    margin-bottom: 24px;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.school-logo {
    width: 44px;
    height: 44px;
    object-fit: contain;
}

.header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.icon-btn {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-secondary);
    position: relative;
}

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

.changelog-icon-btn {
    font-size: 1rem;
}

/* Notification Dot */
.notification-dot {
    position: absolute;
    top: -2px;
    right: -2px;
    width: 10px;
    height: 10px;
    background: #ef4444;
    border-radius: 50%;
    border: 2px solid var(--surface-color);
    animation: pulse-dot 2s infinite;
    display: none;
}

.notification-dot.show {
    display: block;
}

@keyframes pulse-dot {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
    }
    50% {
        transform: scale(1.1);
        box-shadow: 0 0 0 4px rgba(239, 68, 68, 0);
    }
}

.clock-section {
    text-align: right;
    display: none;
}

.current-time {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.current-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Theme button inherits from .icon-btn */

/* Mode Toggle - Clean Pill Design */
.mode-toggle-section {
    display: flex;
    background: var(--surface-color);
    padding: 4px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}

.mode-btn {
    flex: 1;
    padding: 10px 16px;
    border: none;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.mode-btn.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-sm);
}

.mode-btn:hover:not(.active) {
    color: var(--text-primary);
    background: var(--border-light);
}

/* Input Section - Clean Cards */
.input-section {
    background: var(--surface-color);
    padding: 20px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}

.manual-mode-header,
.quick-select-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.manual-mode-header h3,
.quick-select-header h3 {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
}

.add-btn {
    padding: 8px 16px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.add-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

/* Quick Select Grid - Compact */
.quick-select-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
}

.quick-select-btn {
    padding: 14px 12px;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    color: var(--text-primary);
    position: relative;
}

.quick-select-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.quick-select-btn .grade {
    font-size: 1.25rem;
    font-weight: 700;
}

.quick-select-btn .strand {
    font-size: 0.8rem;
    font-weight: 600;
}

.quick-select-btn .section {
    font-size: 0.75rem;
    opacity: 0.7;
}

.quick-select-btn .delete-option {
    position: absolute;
    top: -6px;
    right: -6px;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.7rem;
    opacity: 0;
    transition: all 0.2s ease;
}

.quick-select-btn:hover .delete-option {
    opacity: 1;
}

/* Filter Section - Streamlined */
.filter-section {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}

.filter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    cursor: pointer;
}

.filter-header h3 {
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 600;
}

.filter-toggle-btn {
    padding: 6px 12px;
    background: var(--background-color);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.filter-toggle-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.filter-controls {
    padding: 0 16px 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.search-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.search-group label {
    font-weight: 500;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.search-input-wrapper {
    position: relative;
}

.search-input-wrapper input {
    width: 100%;
    padding: 10px 14px 10px 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--background-color);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.search-input-wrapper input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.filter-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 10px;
}

.filter-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.filter-item label {
    font-weight: 500;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.filter-item select {
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--background-color);
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
}

.filter-item select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Export Section - Minimal */
.export-section {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.export-btn {
    padding: 8px 14px;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    color: white;
}

.export-btn:nth-child(1) { background: var(--success-color); }
.export-btn:nth-child(2) { background: var(--danger-color); }
.export-btn:nth-child(3) { background: var(--primary-color); }

.export-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Table Container - Modern Card Style */
.table-container {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

/* Desktop Table Styles */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    background: var(--background-color);
    color: var(--text-secondary);
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
}

.data-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-primary);
    font-size: 0.9rem;
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.data-table tbody tr:hover {
    background: var(--background-color);
}

/* Entry Mode Badge */
.entry-mode-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 8px;
    border-radius: 100px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.entry-mode-badge.quick {
    background: rgba(251, 146, 60, 0.15);
    color: #ea580c;
}

.entry-mode-badge.manual {
    background: rgba(59, 130, 246, 0.15);
    color: #2563eb;
}

[data-theme="dark"] .entry-mode-badge.quick {
    background: rgba(251, 146, 60, 0.2);
    color: #fb923c;
}

[data-theme="dark"] .entry-mode-badge.manual {
    background: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
}

/* Entry Name Styling */
.entry-name {
    font-weight: 500;
    color: var(--text-primary);
}

.entry-name.quick-entry {
    color: var(--text-muted);
    font-style: italic;
    font-weight: 400;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 6px;
}

.edit-btn,
.delete-btn {
    padding: 6px 10px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 4px;
}

.edit-btn {
    background: rgba(245, 158, 11, 0.1);
    color: #d97706;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.delete-btn {
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.edit-btn:hover {
    background: var(--warning-color);
    color: white;
    border-color: var(--warning-color);
}

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

/* Mobile Card Layout */
.mobile-entries {
    display: none;
    padding: 12px;
    gap: 10px;
}

.entry-card {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px;
    transition: all 0.2s ease;
}

.entry-card:hover {
    box-shadow: var(--shadow-md);
}

.entry-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
    gap: 10px;
}

.entry-card-info {
    flex: 1;
    min-width: 0;
}

.entry-card-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
}

.entry-card-name.quick-entry {
    color: var(--text-muted);
    font-style: italic;
    font-weight: 400;
}

.entry-card-details {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;
}

.entry-card-tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.entry-card-tag.grade {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.2);
    color: var(--primary-color);
}

.entry-card-time {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.entry-card-actions {
    display: flex;
    gap: 6px;
}

.entry-card-actions button {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border-radius: var(--radius-sm);
}

.entry-card-actions button i {
    margin: 0;
}

/* Late Count Badge */
.late-count-badge {
    background: var(--danger-color);
    color: white;
    padding: 2px 6px;
    border-radius: 100px;
    font-size: 0.65rem;
    font-weight: 600;
    animation: badgePulse 0.3s ease;
}

@keyframes badgePulse {
    0% { transform: scale(0.9); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

/* Pagination Section */
.pagination-section {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}

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

.pagination-info span {
    color: var(--text-primary);
    font-weight: 600;
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.pagination-btn {
    padding: 8px 14px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.pagination-btn:disabled {
    background: var(--border-color);
    color: var(--text-muted);
    cursor: not-allowed;
}

.pagination-btn:not(:disabled):hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.page-indicator {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0 8px;
}

.page-indicator span {
    color: var(--text-primary);
    font-weight: 600;
}

.page-size-selector {
    display: flex;
    align-items: center;
    gap: 8px;
}

.page-size-selector label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.page-size-selector select {
    padding: 6px 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--background-color);
    color: var(--text-primary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.page-size-selector select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Summary Section - Compact Cards */
.summary-section {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

/* Settings Section */
.settings-section {
    display: flex;
    justify-content: flex-end;
    padding: 12px 0;
    margin-bottom: 16px;
}

/* App Footer */
.app-footer {
    margin-top: 20px;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-credits {
    display: flex;
    align-items: center;
    gap: 12px;
}

.dev-credit {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.dev-credit strong {
    color: var(--text-secondary);
    font-weight: 600;
}

.version-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    border-radius: 100px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.footer-project {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Changelog button moved to header as icon */

@media (max-width: 480px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-credits {
        flex-direction: column;
        gap: 8px;
    }
}

/* Changelog Modal Styles */
.changelog-modal .changelog-content {
    max-width: 600px;
    max-height: 85vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.changelog-header {
    text-align: center;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 16px;
}

.changelog-header h2 {
    color: var(--text-primary);
    font-size: 1.25rem;
    margin: 0 0 6px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.changelog-header h2 i {
    color: var(--primary-color);
}

.changelog-subtitle {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin: 0;
}

.changelog-body {
    flex: 1;
    overflow-y: auto;
    padding-right: 8px;
}

/* Version Entry */
.version-entry {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 12px;
    transition: all 0.2s ease;
}

.version-entry.current {
    border-color: var(--primary-color);
    border-width: 2px;
}

.version-entry:hover {
    box-shadow: var(--shadow-md);
}

.version-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.version-number {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary-color);
}

.version-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 2px 8px;
    background: var(--surface-color);
    border-radius: 100px;
}

.version-tag {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 3px 8px;
    border-radius: 100px;
}

.version-tag.latest {
    background: linear-gradient(135deg, var(--success-color) 0%, #16a34a 100%);
    color: white;
}

.version-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.version-changes {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.change-category h4 {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 6px 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.change-category h4 i {
    font-size: 0.7rem;
}

.change-category ul {
    margin: 0;
    padding-left: 18px;
    list-style: none;
}

.change-category ul li {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
    position: relative;
}

.change-category ul li::before {
    content: "•";
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: -14px;
}

.changelog-footer {
    text-align: center;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    margin-top: 16px;
}

.changelog-footer p {
    margin: 0;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.changelog-footer strong {
    color: var(--primary-color);
}

/* Scrollbar for changelog */
.changelog-body::-webkit-scrollbar {
    width: 6px;
}

.changelog-body::-webkit-scrollbar-track {
    background: var(--background-color);
    border-radius: 3px;
}

.changelog-body::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.changelog-body::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Mobile changelog */
@media (max-width: 600px) {
    .changelog-modal .changelog-content {
        padding: 16px;
        max-height: 90vh;
    }
    
    .changelog-header h2 {
        font-size: 1.1rem;
    }
    
    .version-entry {
        padding: 12px;
    }
    
    .version-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }
}

.clear-data-btn {
    padding: 8px 14px;
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.clear-data-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--danger-color);
    color: var(--danger-color);
}

.summary-card {
    background: var(--surface-color);
    padding: 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.summary-card h3 {
    color: var(--text-muted);
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
}

.summary-count {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    font-variant-numeric: tabular-nums;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 10000;
}

.toast {
    background: var(--surface-color);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 8px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 280px;
    max-width: 360px;
    animation: toastSlide 0.3s ease;
    border: 1px solid var(--border-color);
}

.toast.success { border-left: 3px solid var(--toast-success); }
.toast.error { border-left: 3px solid var(--toast-error); }
.toast.info { border-left: 3px solid var(--toast-info); }

@keyframes toastSlide {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Modal Styles - Clean & Modern */
.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    justify-content: center;
    align-items: center;
    padding: 16px;
}

.modal[style*="display: block"],
.modal.show {
    display: flex !important;
}

.modal-content {
    background-color: var(--surface-color);
    padding: 24px;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 440px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    transform: scale(0.95);
    transition: transform 0.2s ease;
}

.modal.show .modal-content {
    transform: scale(1);
}

.close {
    color: var(--text-muted);
    position: absolute;
    right: 16px;
    top: 16px;
    font-size: 24px;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
}

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

.modal h2 {
    margin-bottom: 20px;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
}

/* Form Styles */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
}

.form-group label {
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.form-group input,
.form-group select {
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--background-color);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.modal-buttons {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.save-btn,
.cancel-btn,
.confirm-btn {
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    flex: 1;
}

.save-btn,
.confirm-btn {
    background: var(--primary-color);
    color: white;
}

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

.cancel-btn {
    background: var(--background-color);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.cancel-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

/* Delete Modal */
.delete-modal .modal-content {
    max-width: 400px;
}

.delete-modal-header {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    padding: 16px 20px;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    display: flex;
    align-items: center;
    gap: 10px;
    margin: -24px -24px 20px -24px;
}

.delete-modal-header i {
    font-size: 20px;
    color: #fef08a;
}

.delete-modal-header h2 {
    margin: 0;
    font-size: 1rem;
    color: white;
}

.delete-modal-body {
    text-align: center;
    padding: 0 0 16px;
}

.delete-modal-body p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.delete-info {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-sm);
    padding: 12px;
}

.delete-info strong {
    color: var(--danger-color);
    font-size: 1rem;
}

.delete-modal-footer {
    display: flex;
    gap: 10px;
}

.confirm-delete-btn,
.cancel-delete-btn {
    flex: 1;
    padding: 10px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.confirm-delete-btn {
    background: var(--danger-color);
    color: white;
}

.confirm-delete-btn:hover {
    background: #dc2626;
}

.cancel-delete-btn {
    background: var(--background-color);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.cancel-delete-btn:hover {
    background: var(--border-color);
}

/* Export Modal */
.export-form {
    padding: 8px 0;
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 8px;
}

.radio-option {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--background-color);
}

.radio-option:hover {
    border-color: var(--primary-color);
}

.radio-option input[type="radio"] {
    margin-right: 10px;
    accent-color: var(--primary-color);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 8px;
}

.checkbox-option {
    display: flex;
    align-items: center;
    padding: 8px 0;
    cursor: pointer;
}

.checkbox-option input[type="checkbox"] {
    margin-right: 10px;
    accent-color: var(--primary-color);
    transform: scale(1.1);
}

.format-buttons {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.format-btn {
    flex: 1;
    padding: 12px 16px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.format-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.form-input {
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    background: var(--background-color);
    color: var(--text-primary);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Empty State */
.empty-state {
    padding: 48px 24px;
    text-align: center;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 0.9rem;
}

/* Success Modal */
.success-modal .modal-header.success {
    background: linear-gradient(135deg, var(--success-color), #16a34a);
    color: white;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    margin: -24px -24px 20px -24px;
    padding: 16px 20px;
    text-align: center;
}

.success-modal .modal-header.success h2 {
    color: white;
    margin: 0;
}

.success-details {
    background: rgba(34, 197, 94, 0.1);
    border-left: 3px solid var(--success-color);
    padding: 12px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin: 16px 0;
}

.success-details p {
    margin: 6px 0;
    font-size: 0.9rem;
}

/* Duplicate Modal */
.duplicate-modal .modal-header {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    margin: -24px -24px 20px -24px;
    padding: 16px 20px;
}

.duplicate-modal .modal-header h2 {
    color: white;
    margin: 0;
}

.duplicate-modal .modal-body {
    background: rgba(245, 158, 11, 0.1);
    padding: 16px;
    border-radius: var(--radius-sm);
    border-left: 3px solid #f59e0b;
}

.duplicate-details {
    background: var(--surface-color);
    padding: 12px;
    border-radius: var(--radius-sm);
    margin: 12px 0;
    border: 1px solid var(--border-color);
}

.duplicate-details p {
    margin: 6px 0;
    font-size: 0.9rem;
}

/* Responsive Design */

/* Tablets and up */
@media (min-width: 768px) {
    .container {
        padding: 24px;
    }
    
    .header h1 {
        font-size: 1.5rem;
    }
    
    .clock-section {
        display: block;
    }
    
    .data-table {
        display: table;
    }
    
    .mobile-entries {
        display: none !important;
    }
}

/* Mobile - Show Cards, Hide Table */
@media (max-width: 767px) {
    .container {
        padding: 12px;
    }
    
    .header {
        padding: 12px 0;
        margin-bottom: 16px;
    }
    
    .header h1 {
        font-size: 1rem;
    }
    
    .school-logo {
        width: 36px;
        height: 36px;
    }
    
    .icon-btn {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
    
    .header-actions {
        gap: 6px;
    }
    
    .notification-dot {
        width: 8px;
        height: 8px;
        top: -1px;
        right: -1px;
    }
    
    .mode-btn {
        padding: 8px 12px;
        font-size: 0.8rem;
    }
    
    .input-section {
        padding: 14px;
    }
    
    .quick-select-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    
    .quick-select-btn {
        padding: 12px 8px;
    }
    
    .quick-select-btn .grade {
        font-size: 1.1rem;
    }
    
    .filter-section {
        margin-bottom: 16px;
    }
    
    .filter-header {
        padding: 12px 14px;
    }
    
    .filter-controls {
        padding: 0 14px 14px;
    }
    
    .filter-group {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }
    
    .export-section {
        gap: 6px;
        margin-bottom: 16px;
    }
    
    .export-btn {
        padding: 8px 12px;
        font-size: 0.75rem;
        flex: 1;
    }
    
    /* Hide desktop table, show mobile cards */
    .data-table {
        display: none;
    }
    
    .mobile-entries {
        display: flex;
        flex-direction: column;
    }
    
    .table-container {
        border-radius: var(--radius-md);
    }
    
    .summary-section {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }
    
    .summary-card {
        padding: 12px 8px;
    }
    
    .summary-card h3 {
        font-size: 0.6rem;
    }
    
    .summary-count {
        font-size: 1.4rem;
    }
    
    /* Modal Mobile */
    .modal-content {
        padding: 20px;
        margin: 0;
        max-height: 85vh;
    }
    
    .modal-buttons {
        flex-direction: column;
    }
    
    .format-buttons {
        flex-direction: column;
    }
    
    .delete-modal-footer {
        flex-direction: column;
    }
    
    /* Mobile Pagination */
    .pagination-section {
        flex-direction: column;
        text-align: center;
        gap: 10px;
        padding: 12px;
    }
    
    .pagination-info {
        order: 2;
        font-size: 0.75rem;
    }
    
    .pagination-controls {
        order: 1;
        width: 100%;
        justify-content: space-between;
    }
    
    .pagination-btn {
        padding: 10px 16px;
        font-size: 0.8rem;
    }
    
    .page-indicator {
        font-size: 0.75rem;
    }
    
    .page-size-selector {
        order: 3;
        width: 100%;
        justify-content: center;
    }
}

/* Very small screens */
@media (max-width: 360px) {
    .container {
        padding: 8px;
    }
    
    .header h1 {
        font-size: 0.9rem;
    }
    
    .quick-select-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .filter-group {
        grid-template-columns: 1fr;
    }
    
    .summary-section {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

/* Improve focus visibility */
button:focus,
input:focus,
select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Smooth scrolling */
.table-container::-webkit-scrollbar {
    height: 6px;
}

.table-container::-webkit-scrollbar-track {
    background: var(--background-color);
}

.table-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

/* Touch improvements */
button, .quick-select-btn {
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
    touch-action: manipulation;
    -webkit-user-select: none;
    user-select: none;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print Styles */
@media print {
    .header-controls,
    .mode-toggle-section,
    .input-section,
    .filter-section,
    .export-section,
    .action-buttons {
        display: none !important;
    }
}