/* ===================================
   General Clauses Act, 1897 - Styles
   Professional Legal Education Theme
   =================================== */

/* CSS Variables for Consistent Theming */
:root {
    /* Primary Colors - Professional Legal Theme */
    --primary-navy: #1e3a5f;
    --primary-blue: #2c5aa0;
    --accent-gold: #d4af37;
    --accent-light-gold: #f4e4c1;
    
    /* Secondary Colors */
    --secondary-teal: #4a90a4;
    --secondary-light-teal: #7ab8cc;
    
    /* Neutral Colors */
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --medium-gray: #e9ecef;
    --dark-gray: #495057;
    --text-dark: #212529;
    
    /* Semantic Colors */
    --success: #28a745;
    --info: #17a2b8;
    --warning: #ffc107;
    --danger: #dc3545;
    
    /* Typography */
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

/* ===================================
   Reset & Base Styles
   =================================== */

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

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--light-gray);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    line-height: 1.3;
    font-weight: 600;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-navy);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-blue);
}

h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-blue);
}

h5 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

p {
    margin-bottom: var(--spacing-sm);
}

ul, ol {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

li {
    margin-bottom: var(--spacing-xs);
}

a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-gold);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   Header
   =================================== */

.main-header {
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-blue) 100%);
    color: var(--white);
    padding: var(--spacing-xl) 0;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.main-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(45deg, rgba(212, 175, 55, 0.05) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(212, 175, 55, 0.05) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(212, 175, 55, 0.05) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(212, 175, 55, 0.05) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    opacity: 0.3;
}

.header-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.header-content h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: 1px;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-xs);
}

.prepared-by {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--accent-light-gold);
}

.prepared-by strong {
    color: var(--accent-gold);
    font-weight: 600;
}

.disclaimer {
    font-size: 0.9rem;
    font-style: italic;
    opacity: 0.8;
    margin-top: var(--spacing-sm);
}

/* ===================================
   Navigation Tabs
   =================================== */

.nav-tabs {
    background-color: var(--white);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-tabs .container {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    flex-wrap: wrap;
}

.tab-btn {
    background-color: transparent;
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    font-family: var(--font-body);
}

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

.tab-btn.active {
    background-color: var(--primary-blue);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

/* ===================================
   Main Content
   =================================== */

.main-content {
    padding: var(--spacing-xl) 0;
    min-height: 70vh;
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

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

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

/* ===================================
   Introduction Section
   =================================== */

.intro-card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.intro-section {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--medium-gray);
}

.intro-section:last-child {
    border-bottom: none;
}

.structure-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.structure-card {
    background: linear-gradient(135deg, var(--light-gray) 0%, var(--white) 100%);
    border: 2px solid var(--accent-gold);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
}

.structure-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-blue);
}

.structure-card h4 {
    color: var(--primary-navy);
    margin-bottom: var(--spacing-xs);
}

.structure-card p {
    font-size: 0.95rem;
    color: var(--dark-gray);
    margin-bottom: 0;
}

/* ===================================
   Sections Tab
   =================================== */

.sections-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.sections-header h2 {
    margin-bottom: var(--spacing-sm);
}

.sections-header p {
    color: var(--dark-gray);
    font-size: 1.1rem;
    margin-bottom: 0;
}

.section-card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    border-left: 5px solid var(--accent-gold);
    transition: all var(--transition-normal);
}

.section-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(5px);
}

.section-btn {
    width: 100%;
    background-color: var(--white);
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-family: var(--font-body);
    transition: background-color var(--transition-fast);
}

.section-btn:hover {
    background-color: var(--light-gray);
}

.section-number {
    font-weight: 700;
    color: var(--accent-gold);
    font-size: 1.1rem;
    min-width: 120px;
    text-align: left;
}

.section-title {
    flex: 1;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-navy);
}

.expand-icon {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: var(--light-gray);
    transition: all var(--transition-fast);
}

.section-card.active .expand-icon {
    transform: rotate(45deg);
    background-color: var(--primary-blue);
    color: var(--white);
}

.section-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease;
    background-color: var(--light-gray);
}

.section-card.active .section-content {
    max-height: 5000px;
    padding: var(--spacing-lg);
}

.content-block {
    background-color: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    border-left: 3px solid var(--secondary-teal);
}

.content-block:last-child {
    margin-bottom: 0;
}

.content-block h4 {
    color: var(--primary-navy);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--accent-light-gold);
}

.legal-text {
    font-style: italic;
    background-color: var(--accent-light-gold);
    padding: var(--spacing-md);
    border-left: 4px solid var(--accent-gold);
    border-radius: var(--radius-sm);
    font-size: 1.05rem;
    line-height: 1.8;
}

.definition-item {
    background-color: var(--light-gray);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--secondary-teal);
}

.definition-item h5 {
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.definition-item p {
    margin-bottom: var(--spacing-sm);
}

.definition-item p strong {
    color: var(--primary-navy);
}

.example-box {
    background: linear-gradient(135deg, #e3f2fd 0%, #f8f9fa 100%);
    border: 2px solid var(--secondary-light-teal);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.example-box h5 {
    color: var(--secondary-teal);
    margin-bottom: var(--spacing-sm);
}

.example-box p {
    margin-bottom: var(--spacing-xs);
}

.example-box ul {
    margin-top: var(--spacing-xs);
}

.case-law {
    background: linear-gradient(135deg, #fff9e6 0%, #ffffff 100%);
    border: 2px solid var(--accent-gold);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.case-law h5 {
    color: var(--primary-navy);
    font-style: italic;
    margin-bottom: var(--spacing-sm);
}

.case-law p {
    margin-bottom: 0;
}

/* ===================================
   Visualizations
   =================================== */

.visualization-container {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.visualization-container h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--primary-navy);
}

.mindmap-container,
.flowchart-container {
    background-color: var(--light-gray);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    overflow-x: auto;
}

#mindmap-svg,
#flowchart-svg {
    display: block;
    margin: 0 auto;
}

.legend {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--light-gray);
    border-radius: var(--radius-md);
}

.legend h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-navy);
}

.legend-item {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.legend-color {
    width: 30px;
    height: 20px;
    border-radius: var(--radius-sm);
    margin-right: var(--spacing-sm);
    border: 1px solid var(--dark-gray);
}

/* ===================================
   Roadmap Timeline
   =================================== */

.roadmap-container {
    padding: var(--spacing-md);
}

.timeline {
    position: relative;
    padding: var(--spacing-lg) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--accent-gold) 0%, var(--primary-blue) 100%);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-item:nth-child(odd) .timeline-content {
    text-align: right;
    padding-right: var(--spacing-xl);
}

.timeline-item:nth-child(even) .timeline-content {
    text-align: left;
    padding-left: var(--spacing-xl);
}

.timeline-marker {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 24px;
    background-color: var(--accent-gold);
    border: 4px solid var(--white);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--primary-blue);
    z-index: 2;
}

.timeline-content {
    flex: 1;
    background-color: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid var(--primary-blue);
    transition: all var(--transition-normal);
    max-width: 45%;
}

.timeline-content:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-gold);
}

.timeline-content h3 {
    color: var(--accent-gold);
    font-size: 1.8rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

.timeline-content h4 {
    color: var(--primary-navy);
    margin-bottom: var(--spacing-sm);
}

.timeline-content p {
    color: var(--dark-gray);
    margin-bottom: 0;
}

/* ===================================
   Footer
   =================================== */

.main-footer {
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-blue) 100%);
    color: var(--white);
    padding: var(--spacing-xl) 0;
    text-align: center;
    margin-top: var(--spacing-xl);
}

.main-footer p {
    margin-bottom: var(--spacing-xs);
}

.main-footer strong {
    color: var(--accent-gold);
}

.footer-disclaimer {
    font-size: 0.9rem;
    font-style: italic;
    opacity: 0.8;
    margin-top: var(--spacing-sm);
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 1024px) {
    .header-content h1 {
        font-size: 2.5rem;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        flex-direction: row !important;
    }
    
    .timeline-item .timeline-content {
        text-align: left !important;
        padding-left: var(--spacing-xl) !important;
        padding-right: var(--spacing-md) !important;
        max-width: 100%;
    }
    
    .timeline-marker {
        left: 20px;
        transform: translateX(0);
    }
}

@media (max-width: 768px) {
    .header-content h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.6rem;
    }
    
    .nav-tabs .container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .tab-btn {
        width: 100%;
        margin-bottom: var(--spacing-xs);
    }
    
    .structure-grid {
        grid-template-columns: 1fr;
    }
    
    .section-btn {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .section-number,
    .section-title {
        width: 100%;
    }
    
    .expand-icon {
        position: absolute;
        right: var(--spacing-md);
        top: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .header-content h1 {
        font-size: 1.6rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .intro-card,
    .visualization-container {
        padding: var(--spacing-md);
    }
}

/* ===================================
   Print Styles
   =================================== */

@media print {
    .main-header,
    .nav-tabs,
    .main-footer {
        display: none;
    }
    
    .tab-content {
        display: block !important;
    }
    
    .section-content {
        max-height: none !important;
        padding: var(--spacing-md) !important;
    }
    
    body {
        background-color: var(--white);
    }
}

/* ===================================
   Accessibility
   =================================== */

.tab-btn:focus,
.section-btn:focus {
    outline: 3px solid var(--accent-gold);
    outline-offset: 2px;
}

.tab-btn:focus-visible,
.section-btn:focus-visible {
    outline: 3px solid var(--accent-gold);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-navy: #000000;
        --primary-blue: #0000ff;
        --accent-gold: #ffaa00;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}