/* -------------------------------------------------------------
 * Timetable Generator Theme Stylesheet
 * Cream (#FFF8EE) & Soft Pastel Orange (#F9C784, #F4A261) Palette
 * ------------------------------------------------------------- */

/* Variables and Themes */
:root {
    /* Cream Theme (Light Mode) */
    --bg-primary: #FFF8EE;
    --bg-secondary: #FFFDF9;
    --bg-card: #FFFFFF;
    --bg-card-header: #FCF7F0;
    --text-primary: #2D3748;
    --text-secondary: #606E80;
    
    --primary: #F4A261;
    --primary-light: #F9C784;
    --primary-dark: #E76F51;
    --primary-gradient: linear-gradient(135deg, #F9C784, #F4A261, #E76F51);
    
    --success: #66BB6A;
    --success-light: #E8F5E9;
    --warning: #FFA726;
    --warning-light: #FFF3E0;
    --danger: #EF5350;
    --danger-light: #FFEBEE;
    
    --border-color: #F2E4D5;
    --border-color-focus: #F4A261;
    --shadow-color: rgba(244, 162, 97, 0.08);
    --shadow-hover-color: rgba(231, 111, 81, 0.14);
    
    --card-shadow: 0 10px 30px var(--shadow-color);
    --card-shadow-hover: 0 15px 35px var(--shadow-hover-color);
    
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-stack: 'Poppins', system-ui, -apple-system, sans-serif;
}

/* Dark Mode Override */
body.dark-mode {
    --bg-primary: #17130E;
    --bg-secondary: #221D15;
    --bg-card: #2B241C;
    --bg-card-header: #352B21;
    --text-primary: #FFF8EE;
    --text-secondary: #AFA090;
    
    --primary: #F4A261;
    --primary-light: #FFD29D;
    --primary-dark: #E76F51;
    --primary-gradient: linear-gradient(135deg, #F4A261, #E76F51);
    
    --border-color: #3F3427;
    --border-color-focus: #F9C784;
    --shadow-color: rgba(0, 0, 0, 0.35);
    --shadow-hover-color: rgba(0, 0, 0, 0.5);
}

/* Base resets & layout */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-stack);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 10px;
    border: 2px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Typography styles */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

p {
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-secondary);
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 28px;
    font-family: var(--font-stack);
    font-size: 15px;
    font-weight: 600;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary-gradient);
    color: #FFFFFF;
    box-shadow: 0 4px 15px rgba(244, 162, 97, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 22px rgba(231, 111, 81, 0.45);
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--bg-card);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
}

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

.btn-success {
    background-color: var(--success-light);
    border: 2px solid var(--success);
    color: #2E7D32;
}

body.dark-mode .btn-success {
    background-color: rgba(102, 187, 106, 0.15);
    border-color: var(--success);
    color: #A5D6A7;
}

.btn-success:hover {
    background-color: var(--success);
    color: #FFFFFF;
    transform: translateY(-2px);
}

.btn-danger {
    background-color: var(--danger-light);
    border: 2px solid var(--danger);
    color: #C62828;
}

body.dark-mode .btn-danger {
    background-color: rgba(239, 83, 80, 0.15);
    border-color: var(--danger);
    color: #EF9A9A;
}

.btn-danger:hover {
    background-color: var(--danger);
    color: #FFFFFF;
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 13px;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

.icon-action-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background-color: var(--bg-card);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.icon-action-btn:hover {
    color: var(--primary);
    border-color: var(--primary);
    transform: scale(1.05);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 30px;
    background-color: var(--warning-light);
    color: var(--primary-dark);
}

.badge-success {
    background-color: var(--success-light);
    color: var(--success);
}

/* Cards */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

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

/* Header Sections */
.section-desc {
    margin-bottom: 2rem;
    font-size: 16px;
}

/* Sticky Navbar */
.navbar {
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 100;
    background-color: rgba(255, 248, 238, 0.85);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

body.dark-mode .navbar {
    background-color: rgba(23, 19, 14, 0.85);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 16px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    background: var(--primary-gradient);
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 4px 10px rgba(244, 162, 97, 0.25);
}

.brand-text {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.accent-text {
    color: var(--primary-dark);
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
}

.nav-link:hover {
    color: var(--primary-dark);
    background-color: rgba(244, 162, 97, 0.05);
}

.nav-link.active {
    color: var(--primary-dark);
    background-color: rgba(244, 162, 97, 0.1);
}

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

.btn-nav-cta {
    font-size: 14px;
    padding: 10px 20px;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-primary);
    cursor: pointer;
}

/* App Chamber Layout */
.app-layout {
    display: flex;
    flex: 1;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: 24px;
    gap: 24px;
}

/* Sidebar Navigation */
.sidebar {
    width: 280px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: calc(100vh - 120px);
    position: sticky;
    top: 100px;
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 15px;
    color: var(--text-secondary);
    border: 1px solid transparent;
}

.sidebar-item:hover {
    background-color: var(--bg-card);
    color: var(--primary-dark);
    border-color: var(--border-color);
}

.sidebar-item.active {
    background-color: var(--bg-card);
    color: var(--primary-dark);
    border-color: var(--primary);
    box-shadow: 0 4px 15px var(--shadow-color);
}

.sidebar-item i {
    font-size: 18px;
}

.sidebar-footer {
    padding-top: 16px;
}

.sidebar-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    box-shadow: var(--card-shadow);
}

.core-icon {
    font-size: 24px;
    color: var(--primary);
}

.sidebar-card h4 {
    font-size: 14px;
    font-weight: 700;
}

.sidebar-card p {
    font-size: 12px;
}

/* Main Workspace */
.main-content {
    flex: 1;
    min-width: 0;
}

.tab-panel {
    display: none;
    animation: tabFadeIn 0.4s ease-out;
}

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

@keyframes tabFadeIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* SECTION 1: HERO */
.hero-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    padding: 40px 0;
}

.hero-text-content {
    flex: 1.2;
}

.hero-title {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1.5px;
    margin-top: 16px;
    margin-bottom: 20px;
}

.gradient-text {
    background: linear-gradient(135deg, #F4A261, #E76F51);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 18px;
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}

.hero-stats-mini {
    display: flex;
    gap: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.mini-stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-dark);
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
}

.hero-image-container {
    flex: 0.8;
    display: flex;
    justify-content: center;
}

.hero-illustration {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 15px 30px rgba(244, 162, 97, 0.15));
    animation: floatIllustration 4s ease-in-out infinite alternate;
}

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

/* Info Section (GA steps) */
.info-section {
    padding: 60px 0;
    border-top: 1px solid var(--border-color);
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 40px auto;
}

.section-header h2 {
    font-size: 32px;
}

.ga-steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.step-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

.step-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary-light);
    box-shadow: var(--card-shadow-hover);
}

.step-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-sm);
    background-color: var(--warning-light);
    color: var(--primary-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 20px;
}

.step-card h3 {
    font-size: 16px;
    margin-bottom: 10px;
}

.step-card p {
    font-size: 13px;
}

/* SECTION 2: DASHBOARD */
.dashboard-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}

.stat-icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.stat-icon-wrapper.orange {
    background-color: var(--warning-light);
    color: var(--primary-dark);
}

.stat-icon-wrapper.gold {
    background-color: #E8F5E9;
    color: var(--success);
}

.stat-icon-wrapper.peach {
    background-color: var(--danger-light);
    color: var(--danger);
}

.stat-icon-wrapper.coreColor {
    background-color: rgba(244,162,97,0.15);
    color: var(--primary-dark);
}

.stat-card-info h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 2px;
}

.stat-card-info p {
    font-size: 12px;
    font-weight: 500;
}

.dashboard-details {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 24px;
}

.dashboard-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--card-shadow);
}

.dashboard-card h3 {
    font-size: 18px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.text-orange { color: var(--primary); }
.text-peach { color: var(--primary-dark); }

/* Timeline Log */
.activity-timeline {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-height: 350px;
    overflow-y: auto;
}

.timeline-item {
    padding-left: 20px;
    position: relative;
    border-left: 2px solid var(--border-color);
    padding-bottom: 8px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -7px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--primary);
    border: 2px solid var(--bg-card);
}

.timeline-time {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
}

.timeline-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.timeline-item.empty-state {
    border-left: none;
    padding-left: 0;
    text-align: center;
    color: var(--text-secondary);
    padding-top: 40px;
}

.timeline-item.empty-state i {
    font-size: 40px;
    opacity: 0.3;
    margin-bottom: 12px;
    color: var(--primary);
}

/* Pill grouping */
.resource-pill-container h4 {
    font-size: 13px;
    font-weight: bold;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-top: 16px;
    margin-bottom: 8px;
}

.pill-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.pill {
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

/* SECTION 3: GENERATOR FORM */
.generator-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.form-card {
    padding: 32px;
}

.form-section {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.form-section-title {
    font-size: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--primary-dark);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.form-row {
    display: grid;
    gap: 20px;
}

.col-2 { grid-template-columns: repeat(2, 1fr); }
.col-3 { grid-template-columns: repeat(3, 1fr); }
.col-4 { grid-template-columns: repeat(4, 1fr); }

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input, 
.form-group select {
    padding: 12px 18px;
    font-family: var(--font-stack);
    font-size: 14px;
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus, 
.form-group select:focus {
    border-color: var(--border-color-focus);
    background-color: var(--bg-card);
    box-shadow: 0 0 10px var(--shadow-color);
}

.form-group small {
    font-size: 11px;
    color: var(--text-secondary);
}

/* Dynamic Batches */
#batches-wrapper {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.batch-box {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    position: relative;
}

.batch-box-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.batch-box-title {
    font-size: 15px;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-remove-batch {
    color: var(--danger);
    background: none;
    border: none;
    font-size: 14px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.btn-remove-batch:hover {
    text-shadow: 0 0 1px var(--danger);
}

.subjects-editor {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 20px;
}

.subject-item-row {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 12px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.subj-col-grow { flex: 1.5; }
.subj-col-mid { flex: 1; }
.subj-col-sm { flex: 0.5; }

.subject-item-row input,
.subject-item-row select {
    padding: 8px 12px;
    border-radius: var(--radius-sm);
}

.btn-remove-subj {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    font-size: 14px;
    padding: 6px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.btn-remove-subj:hover {
    background-color: var(--danger-light);
}

/* SECTION 4: TIMETABLE DISPLAY */
.timetable-view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.export-actions {
    display: flex;
    gap: 12px;
}

.timetable-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.batch-tabs {
    display: flex;
    gap: 8px;
}

.batch-tab {
    padding: 10px 20px;
    font-size: 13px;
    font-weight: 600;
    border-radius: var(--radius-lg);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
}

.batch-tab.active {
    background-color: var(--primary-dark);
    color: #FFFFFF;
    border-color: var(--primary-dark);
}

.fitness-badge {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    background-color: rgba(244,162,97,0.1);
    color: var(--primary-dark);
    font-weight: bold;
    font-size: 13px;
    border: 1px solid var(--primary-light);
}

/* The Paper Sheet style for PDF printing */
.timetable-paper-card {
    background-color: var(--bg-card);
    border: 1px dashed var(--primary-light);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--card-shadow);
    margin-bottom: 30px;
    position: relative;
}

.timetable-watermark {
    position: absolute;
    bottom: 20px;
    right: 30px;
    font-size: 11px;
    color: var(--text-secondary);
    opacity: 0.5;
}

.timetable-grid-header-meta {
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 20px;
    margin-bottom: 28px;
}

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

.timetable-grid {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-bottom: 20px;
    background-color: var(--bg-card);
    table-layout: fixed; /* Fix columns to equal width headers */
}

.timetable-grid th, 
.timetable-grid td {
    border: 1px solid var(--border-color);
    padding: 16px 12px;
    text-align: center;
    font-size: 13px;
    font-weight: 500;
}

.timetable-grid th {
    background-color: var(--bg-card-header);
    color: var(--text-primary);
    font-weight: 700;
    font-size: 14px;
}

.timetable-grid th:first-child {
    border-top-left-radius: var(--radius-sm);
    width: 110px; /* Day column size limit */
}

.timetable-grid th:last-child {
    border-top-right-radius: var(--radius-sm);
}

.timetable-grid td.day-header {
    background-color: var(--bg-card-header);
    font-weight: bold;
    color: var(--primary-dark);
}

/* Subject Block Display Inside TD */
.slot-cell {
    min-height: 70px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border-radius: var(--radius-sm);
    padding: 8px;
    transition: var(--transition);
}

.slot-cell.active-class {
    box-shadow: 0 4px 10px rgba(0,0,0,0.03);
    border: 1px solid rgba(0,0,0,0.05);
}

.slot-cell:hover {
    transform: scale(1.02);
}

.slot-subject {
    font-size: 14px;
    font-weight: bold;
    color: #FFF8EE;
    letter-spacing: -0.2px;
}

.slot-teacher {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.85);
    margin-top: 4px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.slot-room {
    font-size: 10px;
    font-weight: 700;
    background-color: rgba(255,255,255,0.2);
    padding: 2px 6px;
    border-radius: 4px;
    color: #FFFFFF;
    margin-top: 6px;
    box-shadow: inset 0 0 4px rgba(0,0,0,0.05);
}

.slot-cell.empty-slot {
    color: var(--text-secondary);
    opacity: 0.3;
    font-weight: normal;
    font-style: italic;
    font-size: 12px;
}

/* Signature footer block */
.timetable-footer-signature {
    display: none; /* Only visible in print layout / PDF */
    justify-content: space-between;
    margin-top: 50px;
    padding-top: 30px;
}

.signature-line {
    width: 250px;
    border-top: 2px solid var(--text-primary);
    text-align: center;
    font-size: 13px;
    font-weight: bold;
    padding-top: 8px;
}

/* Run Report details */
.algorithm-logs-card {
    margin-top: 24px;
}

.analytics-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 16px;
}

.analytics-block {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.analytics-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.analytics-val {
    font-size: 20px;
    font-weight: bold;
}

.text-success { color: var(--success); }
.text-warning { color: var(--warning); }

/* UI MODALS & OVERLAYS */

/* Modal Learn More */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(18, 14, 8, 0.4);
    backdrop-filter: blur(5px);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 600px;
    max-width: 90%;
    box-shadow: 0 20px 50px rgba(0,0,0,0.15);
    overflow: hidden;
    animation: modalSlide 0.3s ease-out;
}

@keyframes modalSlide {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 28px;
    background-color: var(--bg-card-header);
    border-bottom: 1px solid var(--border-color);
}

.modal-close {
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-secondary);
    cursor: pointer;
}

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

.modal-body {
    padding: 28px;
    max-height: 400px;
    overflow-y: auto;
}

.modal-body p {
    margin-bottom: 16px;
}

.modal-body h4 {
    font-size: 15px;
    margin-top: 20px;
    margin-bottom: 10px;
}

.modal-body ul {
    margin-left: 20px;
    margin-bottom: 16px;
    color: var(--text-secondary);
    font-size: 14px;
}

.modal-body li {
    margin-bottom: 6px;
}

.modal-footer {
    padding: 20px 28px;
    display: flex;
    justify-content: flex-end;
    border-top: 1px solid var(--border-color);
}

/* Spinner Overlay for Timetable Evolution */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 248, 238, 0.9);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

body.dark-mode .loading-overlay {
    background-color: rgba(23, 19, 14, 0.95);
}

.loading-box {
    text-align: center;
    max-width: 450px;
    padding: 40px;
}

.loading-spinner-wrapper {
    height: 120px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 24px;
}

.loader-bar-outer {
    width: 100%;
    height: 8px;
    background-color: var(--border-color);
    border-radius: 10px;
    margin: 16px auto;
    overflow: hidden;
}

.loader-bar-inner {
    width: 10%;
    height: 100%;
    background: var(--primary-gradient);
    border-radius: 10px;
    transition: width 0.15s ease-out;
}

.loading-box h3 {
    font-size: 22px;
    color: var(--primary-dark);
}

.loading-box p {
    font-size: 14px;
}

.loading-quote {
    display: block;
    margin-top: 24px;
    font-style: italic;
    font-size: 12px;
    color: var(--text-secondary);
}

/* Spinner Atom Orbit Animation */
.loading-atom {
    position: relative;
    width: 80px;
    height: 80px;
}

.atom-core {
    position: absolute;
    top: 34px;
    left: 34px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--primary-dark);
    box-shadow: 0 0 10px var(--primary-dark);
}

.atom-orbit {
    position: absolute;
    width: 80px;
    height: 80px;
    border: 2px solid var(--primary-light);
    border-radius: 50%;
    opacity: 0.7;
}

.orbit-1 {
    transform: rotateX(70deg) rotateY(20deg);
    animation: rotateOrbit1 1.5s linear infinite;
}

.orbit-2 {
    transform: rotateX(70deg) rotateY(-20deg);
    animation: rotateOrbit2 1.5s linear infinite;
}

.orbit-3 {
    transform: rotateX(0deg) rotateY(70deg);
    animation: rotateOrbit3 1.5s linear infinite;
}

@keyframes rotateOrbit1 {
    0% { transform: rotateX(70deg) rotateY(20deg) rotateZ(0deg); }
    100% { transform: rotateX(70deg) rotateY(20deg) rotateZ(360deg); }
}

@keyframes rotateOrbit2 {
    0% { transform: rotateX(70deg) rotateY(-20deg) rotateZ(360deg); }
    100% { transform: rotateX(70deg) rotateY(-20deg) rotateZ(0deg); }
}

@keyframes rotateOrbit3 {
    0% { transform: rotateX(0deg) rotateY(70deg) rotateZ(0deg); }
    100% { transform: rotateX(0deg) rotateY(70deg) rotateZ(360deg); }
}

/* Toast System */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 3000;
}

.toast {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    border-radius: var(--radius-md);
    background-color: var(--bg-card);
    border-left: 5px solid var(--primary);
    color: var(--text-primary);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    min-width: 320px;
    animation: toastSlideIn 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
    transition: var(--transition);
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.toast.removing {
    opacity: 0;
    transform: translateX(100px);
}

.toast-success { border-left-color: var(--success); }
.toast-error { border-left-color: var(--danger); }
.toast-warning { border-left-color: var(--warning); }

.toast-icon {
    font-size: 20px;
}

.toast-success .toast-icon { color: var(--success); }
.toast-error .toast-icon { color: var(--danger); }
.toast-warning .toast-icon { color: var(--warning); }

.toast-content h5 {
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 2px;
}

.toast-content p {
    font-size: 12px;
}

/* FOOTER */
.app-footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 24px 0;
    margin-top: auto;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-brand {
    font-weight: 800;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-copy {
    font-size: 12px;
}

/* -------------------------------------------------------------
 * Responsive Styling Blocks (desktop tablet mobile grid breaking)
 * ------------------------------------------------------------- */
@media (max-width: 1200px) {
    .ga-steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .dashboard-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .app-layout {
        flex-direction: column;
        padding: 16px;
    }

    .sidebar {
        display: none; /* Hide desktop sidebar */
    }

    .hero-section {
        flex-direction: column;
        text-align: center;
        padding: 20px 0;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-stats-mini {
        justify-content: center;
    }

    .hero-image-container {
        margin-top: 24px;
        order: -1; /* Place image on top on smaller viewports */
    }

    .dashboard-details {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; /* Handle menu collapse toggle */
    }

    .nav-links.mobile-visible {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: var(--bg-card);
        border-bottom: 2px solid var(--border-color);
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    }

    .mobile-menu-toggle {
        display: block;
    }

    .btn-nav-cta {
        display: none; /* Hide header cta shortcut on small screens */
    }

    .col-3, .col-4 {
        grid-template-columns: 1fr;
    }
    
    .col-2 {
        grid-template-columns: 1fr;
    }

    .hero-title {
        font-size: 36px;
    }
    
    .timetable-view-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .export-actions {
        width: 100%;
        justify-content: space-between;
    }
}

/* Print Overrides */
@media print {
    body {
        background-color: #FFFFFF !important;
        color: #000000 !important;
        font-family: serif;
    }

    .navbar, .sidebar, .export-actions, .algorithm-logs-card, .app-footer, #learn-more-modal, #generation-spinner, .app-layout {
        display: none !important;
    }
    
    .tab-panel {
        display: none !important;
    }
    
    #tab-timetable {
        display: block !important;
        width: 100% !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    
    .timetable-paper-card {
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
        margin: 0 !important;
        width: 100% !important;
    }

    .timetable-footer-signature {
        display: flex !important;
    }
    
    .timetable-grid th, .timetable-grid td {
        border: 1px solid #000000 !important;
        color: #000000 !important;
        background-color: transparent !important;
    }
    
    .slot-cell {
        box-shadow: none !important;
        border: none !important;
        background: transparent !important;
        color: #000000 !important;
    }

    .slot-subject {
        color: #000000 !important;
    }

    .slot-teacher {
        color: #444444 !important;
    }

    .slot-room {
        color: #000000 !important;
        background: none !important;
        border: 1px solid #000000 !important;
        box-shadow: none !important;
    }
}

/* -------------------------------------------------------------
 * Mode Selection Overlay & Premium Landing Screen
 * ------------------------------------------------------------- */
.mode-select-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(160deg, #FFF8EE 0%, #FFFDF9 35%, #FFF3E5 70%, #FFE8D6 100%);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px 24px;
    overflow-y: auto;
}

body.dark-mode .mode-select-overlay {
    background: linear-gradient(160deg, #1A150F 0%, #17130E 35%, #1F1912 100%);
}

/* Top-Left & Bottom-Right Warm Gradient Blobs */
.mode-select-bg-blobs {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}

.blob {
    position: absolute;
    border-radius: 50%;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(231,111,81,0.18) 0%, rgba(244,162,97,0.10) 50%, transparent 70%);
    top: -140px;
    left: -140px;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(249,199,132,0.15) 0%, rgba(244,162,97,0.08) 50%, transparent 70%);
    bottom: -80px;
    right: -80px;
}

/* Large Background Building Illustrations (Behind Card Area) */
.landing-bg-buildings {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -42%);
    width: 100%;
    max-width: 1100px;
    height: 400px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    pointer-events: none;
    z-index: 0;
    padding: 0 20px;
}

.bg-building {
    width: 420px;
    height: auto;
    opacity: 0.10;
}

.bg-building-left {
    margin-left: -40px;
}

.bg-building-right {
    margin-right: -40px;
}

/* Prominent Bottom Waves */
.landing-waves {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    pointer-events: none;
    z-index: 0;
    line-height: 0;
    height: 180px;
}

.landing-waves svg {
    width: 100%;
    height: 100%;
}

/* Container */
.mode-select-container {
    max-width: 1280px;
    width: 100%;
    margin: auto;
    text-align: center;
    position: relative;
    z-index: 2;
    padding: 0 24px;
}

/* Landing Header & Typography */
.mode-select-header {
    margin-bottom: 48px;
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: fadeDown 0.65s ease-out forwards;
}

.landing-main-title {
    font-size: 46px;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 14px;
    color: var(--text-primary);
    line-height: 1.15;
}

.coral-gradient-text {
    background: linear-gradient(135deg, #E76F51 0%, #F4A261 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.landing-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 500px;
    line-height: 1.7;
    font-weight: 400;
}

/* Mode Cards Grid */
.mode-cards-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 36px;
    max-width: 900px;
    margin: 0 auto;
    animation: fadeUp 0.8s ease-out forwards;
}

@media (max-width: 768px) {
    .mode-cards-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .landing-main-title {
        font-size: 32px;
    }
    .landing-bg-buildings {
        display: none;
    }
    .landing-corner-decoration {
        display: none;
    }
}

/* Mode Cards */
.mode-card {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1.5px solid rgba(244, 162, 97, 0.15);
    border-radius: 24px;
    padding: 48px 36px 36px 36px;
    box-shadow: 0 8px 32px rgba(231, 111, 81, 0.06);
    transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

body.dark-mode .mode-card {
    background: rgba(35, 30, 24, 0.92);
    border-color: rgba(244, 162, 97, 0.12);
}

/* Card Hover: Lift + Scale + Stronger Shadow */
.mode-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: rgba(244, 162, 97, 0.35);
    box-shadow: 0 24px 48px rgba(231, 111, 81, 0.14);
}

/* Category Badges (Top-Right, Soft Coral Pill) */
.mode-card-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 10.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    padding: 5px 14px;
    border-radius: 50px;
    background-color: rgba(231, 111, 81, 0.10);
    color: #E76F51;
}

body.dark-mode .mode-card-badge {
    background-color: rgba(244, 162, 97, 0.15);
    color: #F4A261;
}

/* Icon Wrapper with Glow */
.mode-card-icon-wrapper {
    position: relative;
    margin-bottom: 28px;
}

.mode-card-icon-glow {
    position: absolute;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(244,162,97,0.35) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.4s ease;
}

.mode-card:hover .mode-card-icon-glow {
    transform: translate(-50%, -50%) scale(1.3);
    background: radial-gradient(circle, rgba(231,111,81,0.40) 0%, transparent 70%);
}

.mode-card-icon {
    width: 76px;
    height: 76px;
    border-radius: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    background: linear-gradient(145deg, #FFF3E0, #FFE0B2);
    color: #E76F51;
    box-shadow: 0 6px 18px rgba(231, 111, 81, 0.12);
    transition: all 0.4s ease;
    position: relative;
    z-index: 1;
}

.mode-card:hover .mode-card-icon {
    transform: scale(1.06) rotate(-3deg);
    box-shadow: 0 8px 24px rgba(231, 111, 81, 0.20);
}

.mode-card h3 {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.4px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.mode-card p {
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 28px;
    color: var(--text-secondary);
    flex: 1;
}

/* Landing Gradient Buttons (Full-width coral gradient) */
.landing-btn {
    background: linear-gradient(135deg, #E76F51 0%, #F4A261 100%) !important;
    border: none !important;
    border-radius: 14px !important;
    padding: 14px 24px !important;
    font-size: 14px !important;
    font-weight: 700 !important;
    letter-spacing: 0.3px;
    color: #FFFFFF !important;
    box-shadow: 0 6px 20px rgba(231, 111, 81, 0.25);
    transition: all 0.35s ease !important;
}

.landing-btn:hover {
    box-shadow: 0 10px 30px rgba(231, 111, 81, 0.35) !important;
    transform: translateY(-2px);
}

/* Bottom-Right Corner Decoration */
.landing-corner-decoration {
    position: absolute;
    bottom: 20px;
    right: 30px;
    width: 180px;
    pointer-events: none;
    opacity: 0.9;
    z-index: 3;
}

/* Entrance Animations */
@keyframes fadeDown {
    from {
        opacity: 0;
        transform: translateY(-24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(32px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}