/* Modern CSS Reset & Variable Tokens */
:root {
    --bg-dark: #07080d;
    --bg-card: rgba(17, 19, 31, 0.65);
    --border-color: rgba(255, 255, 255, 0.06);
    --border-color-focus: rgba(99, 102, 241, 0.45);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.3);
    
    --success: #10b981;
    --error: #ef4444;
    --info: #0ea5e9;
    --rating-bg: rgba(99, 102, 241, 0.15);
    --rating-color: #a5b4fc;
    --header-gradient: linear-gradient(135deg, #f8fafc 20%, #94a3b8 50%, #6366f1 100%);
    --card-hover: rgba(255, 255, 255, 0.02);
}

body.light {
    --bg-dark: #f1f5f9;
    --bg-card: rgba(255, 255, 255, 0.85);
    --border-color: rgba(15, 23, 42, 0.08);
    --border-color-focus: rgba(79, 70, 229, 0.4);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --primary: #4f46e5;
    --primary-hover: #3730a3;
    --primary-glow: rgba(79, 70, 229, 0.15);
    
    --success: #059669;
    --error: #dc2626;
    --info: #0284c7;
    --rating-bg: rgba(79, 70, 229, 0.08);
    --rating-color: #4f46e5;
    --header-gradient: linear-gradient(135deg, #0f172a 20%, #334155 60%, #4f46e5 100%);
    --card-hover: rgba(0, 0, 0, 0.015);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Background Glowing Accents */
.glow-bg {
    position: fixed;
    top: -10%;
    left: -10%;
    width: 120%;
    height: 120%;
    background: radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 45%),
                radial-gradient(circle at 15% 75%, rgba(14, 165, 233, 0.07) 0%, transparent 45%);
    z-index: -1;
    pointer-events: none;
}

/* App Container Layout */
.app-container {
    max-width: 1250px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Top Navigation Header bar */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.brand-section {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-family: 'Outfit', sans-serif;
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    background: var(--header-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 300;
}

/* Top Nav Controls */
.top-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Select Styling */
.term-select-container {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.term-select-container label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    font-weight: 700;
}

.term-select {
    background: rgba(15, 17, 26, 0.6);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.6rem 2rem 0.6rem 1rem;
    border-radius: 10px;
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    cursor: pointer;
    font-size: 0.95rem;
    outline: none;
    transition: all 0.25s ease;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1rem;
}

body.light .term-select {
    background: rgba(255, 255, 255, 0.9);
}

.term-select:focus {
    border-color: var(--border-color-focus);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Theme Toggle Button */
.theme-toggle {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.6rem 1.1rem;
    border-radius: 10px;
    cursor: pointer;
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
}

body.light .theme-toggle {
    background: rgba(0, 0, 0, 0.03);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

body.light .theme-toggle:hover {
    background: rgba(0, 0, 0, 0.06);
}

/* Term Countdown Information Bar */
.countdown-banner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

@media (max-width: 768px) {
    .countdown-banner {
        grid-template-columns: 1fr;
    }
}

.countdown-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.1rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.15);
}

.countdown-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    font-weight: 600;
}

.countdown-value {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

/* Dashboard Columns Workspace */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1.25fr 1fr;
    gap: 2rem;
    align-items: start;
}

@media (max-width: 950px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

/* Standard Glassmorphic Panel Card */
.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 1.75rem;
    box-shadow: 0 15px 35px -10px rgba(0, 0, 0, 0.35);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.panel-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
    margin-bottom: 0.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Search input with inner style */
.search-container {
    position: relative;
    width: 100%;
}

.search-input {
    width: 100%;
    background: rgba(10, 11, 16, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.8rem 1.1rem;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: all 0.25s ease;
}

body.light .search-input {
    background: rgba(255, 255, 255, 0.9);
}

.search-input:focus {
    border-color: var(--border-color-focus);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

/* Scrollable course lists */
.course-list {
    max-height: 380px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    padding-right: 0.25rem;
}

/* Webkit Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.15);
    border-radius: 100px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(148, 163, 184, 0.3);
}

/* Individual Course Item list card */
.course-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.9rem 1.1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

body.light .course-item {
    background: rgba(0, 0, 0, 0.01);
}

.course-item:hover {
    background: var(--card-hover);
    border-color: rgba(255, 255, 255, 0.12);
    transform: translateX(2px);
}

.course-info {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    flex: 1;
    overflow: hidden;
}

.course-code-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.course-code {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
}

.course-credits {
    font-size: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 0.15rem 0.4rem;
    border-radius: 6px;
    color: var(--text-secondary);
}

.course-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.course-rating-badge {
    background: var(--rating-bg);
    border: 1px solid rgba(99, 102, 241, 0.15);
    color: var(--rating-color);
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 0.85rem;
    padding: 0.35rem 0.65rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.course-rating-badge:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.05);
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.25);
}

.course-item.selected-active {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.06);
}

/* Selected list items styling */
.selected-courses-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.selected-badge {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid var(--primary);
    padding: 0.5rem 0.9rem;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
}

.selected-badge:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--error);
    color: #fca5a5;
    transform: translateY(-1px);
}

body.light .selected-badge:hover {
    color: var(--error);
}

.selected-badge::after {
    content: "×";
    font-weight: 700;
    font-size: 1.1rem;
    line-height: 0;
}

.clear-btn {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.25);
    color: #fca5a5;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.4rem 0.75rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

body.light .clear-btn {
    color: var(--error);
}

.clear-btn:hover {
    background: var(--error);
    color: white;
}

/* Settings Form Grid Controls */
.options-form-grid {
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    user-select: none;
}

.checkbox-row input[type="checkbox"] {
    appearance: none;
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    background: rgba(10, 11, 16, 0.5);
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease;
}

body.light .checkbox-row input[type="checkbox"] {
    background: rgba(255, 255, 255, 0.9);
}

.checkbox-row input[type="checkbox"]:checked {
    background: var(--primary);
    border-color: var(--primary);
}

.checkbox-row input[type="checkbox"]:checked::before {
    content: "✓";
    position: absolute;
    color: white;
    font-size: 0.85rem;
    font-weight: 800;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.checkbox-row span {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Settings fields */
.option-input-field {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.option-input-field label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.option-input-control {
    background: rgba(10, 11, 16, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.6rem 0.9rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: all 0.25s ease;
    width: 100%;
}

body.light .option-input-control {
    background: rgba(255, 255, 255, 0.9);
}

.option-input-control:focus {
    border-color: var(--border-color-focus);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.option-input-control:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.time-row-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* Day restrictions multi-checkboxes style */
.days-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.days-title {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.days-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.day-checkbox-label {
    cursor: pointer;
    user-select: none;
    flex: 1;
    min-width: 50px;
    text-align: center;
}

.day-checkbox-label input {
    display: none;
}

.day-checkbox-inner {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 0.5rem 0;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

body.light .day-checkbox-inner {
    background: rgba(0, 0, 0, 0.01);
}

.day-checkbox-label input:checked + .day-checkbox-inner {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.15);
}

/* Generat button style wrapper */
.generator-action-section {
    text-align: center;
    margin: 1.5rem 0;
}

.btn-large {
    width: 100%;
    max-width: 500px;
    padding: 1.25rem 2.5rem;
    font-size: 1.25rem;
    border-radius: 15px;
}

/* Results panel enhancements */
.card-actions {
    display: flex;
    gap: 0.6rem;
    margin-top: 1.25rem;
    flex-wrap: wrap;
}

.action-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

body.light .action-btn {
    background: rgba(0, 0, 0, 0.03);
}

.action-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.2);
}

.action-btn.secondary {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.25);
    color: #a7f3d0;
}

body.light .action-btn.secondary {
    color: var(--success);
}

.action-btn.secondary:hover {
    background: var(--success);
    border-color: var(--success);
    color: white;
    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.2);
}

/* Modal Dialog Component */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

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

.modal-content {
    background: #0f111a;
    border: 1px solid var(--border-color);
    border-radius: 24px;
    width: 100%;
    max-width: 650px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: scale(0.95);
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

body.light .modal-content {
    background: #ffffff;
}

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

.modal-header {
    padding: 1.5rem 1.75rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.35rem;
    font-weight: 700;
}

.modal-close-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.75rem;
    cursor: pointer;
    line-height: 0;
    padding: 0.5rem;
    transition: color 0.15s ease;
}

.modal-close-btn:hover {
    color: var(--error);
}

.modal-body {
    padding: 1.75rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

/* Reviews List Styles */
.comments-list {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.comment-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
}

body.light .comment-card {
    background: rgba(0, 0, 0, 0.01);
}

.comment-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 0.4rem;
}

.comment-difficulty {
    color: var(--primary);
    font-weight: 700;
}

.comment-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    word-break: break-word;
}

/* Copy textarea and details modal style */
.export-crn-textarea {
    width: 100%;
    min-height: 120px;
    background: rgba(10, 11, 16, 0.8);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 10px;
    padding: 0.8rem;
    font-family: monospace;
    font-size: 1rem;
    outline: none;
    resize: none;
}

body.light .export-crn-textarea {
    background: rgba(241, 245, 249, 0.9);
}

.export-help-list {
    padding-left: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Empty placeholder text */
.empty-placeholder {
    color: var(--text-muted);
    text-align: center;
    font-size: 0.95rem;
    padding: 1.5rem 0;
    font-style: italic;
}