:root {
    --color-primary: #0F172A;
    --color-secondary: #D4AF37;
    --color-accent: #F59E0B;
    --color-text: #E2E8F0;
    --color-text-muted: #94A3B8;
    --color-bg: #0A0F1E;
    --color-bg-secondary: #1E293B;
    
    --font-heading: 'Playfair Display', 'Cormorant Garamond', serif;
    --font-body: 'Inter', 'Outfit', sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 16px 32px rgba(0, 0, 0, 0.4);
    
    --transition-base: 0.3s ease;
    --transition-slow: 0.4s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
}

/* Loading Screen */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-primary);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    transition: opacity 0.5s, visibility 0.5s;
}

#loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-spinner {
    width: 80px;
    height: 80px;
    border: 6px solid rgba(212, 175, 55, 0.2);
    border-top-color: var(--color-secondary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-text {
    margin-top: var(--spacing-lg);
    font-size: 1.25rem;
    color: var(--color-secondary);
    font-family: var(--font-heading);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Scroll Progress Bar */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
    z-index: 9999;
    transition: width 0.1s ease;
}

/* Custom Cursor */
.cursor-dot,
.cursor-outline {
    pointer-events: none;
    position: fixed;
    border-radius: 50%;
    z-index: 10000;
    mix-blend-mode: difference;
}

.cursor-dot {
    width: 8px;
    height: 8px;
    background: var(--color-secondary);
}

.cursor-outline {
    width: 36px;
    height: 36px;
    border: 2px solid var(--color-secondary);
    transition: transform 0.15s ease;
}

/* Header */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: transparent;
    z-index: 1000;
    transition: all var(--transition-base);
    padding: var(--spacing-md) 0;
}

header.scrolled {
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.75rem;
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-secondary);
    text-decoration: none;
    line-height: 1.2;
    padding: 0.25rem 0;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
    list-style: none;
}

.nav-menu a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-base);
    line-height: 1.5;
    padding: 0.25rem 0;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-secondary);
}

.search-box {
    position: relative;
}

.search-input {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: 0.5rem var(--spacing-md);
    color: var(--color-text);
    min-height: 44px;
    line-height: 1.5;
    width: 200px;
    transition: all var(--transition-base);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-secondary);
    background: rgba(255, 255, 255, 0.15);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* Main Content */
main {
    padding-top: 80px;
}

/* Tab Container */
.tab-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.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);
    }
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    overflow: hidden;
}

#particles-js {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5vw, 4rem);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-secondary);
    padding: 0.5rem 0;
}

.hero .subtitle {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    color: var(--color-text);
    line-height: 1.5;
    margin-bottom: var(--spacing-lg);
    padding: 0.25rem 0;
}

.hero p {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    padding: 0.25rem 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    min-height: 52px;
    background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
    color: var(--color-primary);
    text-decoration: none;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1.125rem;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 4px 20px rgba(212, 175, 55, 0.3);
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(212, 175, 55, 0.5);
}

.btn i {
    transition: transform var(--transition-base);
}

.btn:hover i {
    transform: translateX(4px);
}

/* Sections */
section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.3;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-secondary);
    padding: 0.5rem 0;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    line-height: 1.8;
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
    padding: 0.25rem 0;
}

/* Glass Cards */
.glass-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: visible;
    min-height: 300px;
    display: flex;
    flex-direction: column;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--color-secondary), transparent);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.glass-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl), 0 0 40px rgba(212, 175, 55, 0.2);
    border-color: rgba(212, 175, 55, 0.3);
}

.glass-card:hover::before {
    opacity: 1;
}

/* Grid Layouts */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    align-items: stretch;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    align-items: stretch;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    align-items: stretch;
}

/* Stats Section */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: var(--spacing-xl) 0;
    align-items: stretch;
}

.stat-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.stat-number {
    font-size: clamp(2.5rem, 4vw, 4rem);
    font-weight: 700;
    color: var(--color-secondary);
    line-height: 1.2;
    padding: 0.25rem 0;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    padding: 0.25rem 0;
}

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

/* REMOVED: Timeline vertical line - this is the fix for the user's request */
.timeline::before {
    display: none;
}

.timeline-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
    position: relative;
}

.timeline-item:nth-child(even) .timeline-content {
    order: -1;
}

.timeline-year {
    font-size: 4rem;
    font-weight: 700;
    color: var(--color-secondary);
    opacity: 0.3;
    line-height: 1;
    padding: 0.25rem 0;
    text-align: center;
    align-self: center;
}

.timeline-content {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.timeline-content h3 {
    font-size: 1.5rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
    padding: 0.25rem 0;
}

.timeline-content p {
    color: var(--color-text-muted);
    line-height: 1.8;
    padding: 0.25rem 0;
}

/* Team Section */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    align-items: stretch;
}

.team-member {
    text-align: center;
    padding: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
    min-height: 550px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.team-member:hover {
    transform: translateY(-10px);
    border-color: rgba(212, 175, 55, 0.3);
    box-shadow: 0 8px 30px rgba(212, 175, 55, 0.2);
}

.team-photo {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--color-secondary);
    margin-bottom: var(--spacing-md);
    box-shadow: 0 4px 20px rgba(212, 175, 55, 0.3);
    transition: all var(--transition-slow);
}

.team-member:hover .team-photo {
    transform: scale(1.08);
    box-shadow: 0 8px 30px rgba(212, 175, 55, 0.5);
}

.team-member h3 {
    font-size: 1.5rem;
    color: var(--color-secondary);
    margin-bottom: 0.5rem;
    line-height: 1.4;
    padding: 0.25rem 0;
}

.team-role {
    font-size: 1rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
    padding: 0.25rem 0;
}

.team-bio {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    padding: 0.25rem 0;
}

/* Charts */
.chart-container {
    height: 350px;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: var(--spacing-xl);
}

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

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--color-text);
    font-weight: 500;
    line-height: 1.5;
    padding: 0.125rem 0;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.5;
    min-height: 48px;
    transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-secondary);
    background: rgba(255, 255, 255, 0.08);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
    line-height: 1.7;
}

/* Footer */
footer {
    background: var(--color-primary);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-2xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
    padding: 0.25rem 0;
}

.footer-section p,
.footer-section a,
.footer-section li {
    color: var(--color-text-muted);
    line-height: 1.7;
    padding: 0.125rem 0;
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    text-decoration: none;
    transition: color var(--transition-base);
    display: inline-block;
}

.footer-section a:hover {
    color: var(--color-secondary);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all var(--transition-base);
}

.social-links a:hover {
    background: var(--color-secondary);
    color: var(--color-primary);
    transform: translateY(-3px);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.copyright {
    color: var(--color-text-muted);
    line-height: 1.6;
    padding: var(--spacing-xs) 0;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-sm);
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-base);
    line-height: 1.5;
    padding: 0.125rem 0;
}

.footer-links a:hover {
    color: var(--color-secondary);
}

/* Analysis Grid - Special 3-column layout for Data Analysis section */
.analysis-grid-three {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    align-items: stretch;
    margin-bottom: var(--spacing-xl);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--color-primary);
        flex-direction: column;
        padding: var(--spacing-2xl) var(--spacing-lg);
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.5);
        transition: right var(--transition-base);
        z-index: 1001;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .grid-3,
    .stats-grid,
    .analysis-grid-three {
        grid-template-columns: 1fr;
    }
    
    .grid-4,
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .grid-2,
    .charts-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline-item {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .timeline-item:nth-child(even) .timeline-content {
        order: 0;
    }
    
    .team-photo {
        width: 160px;
        height: 160px;
    }
    
    /* Disable custom cursor on mobile */
    .cursor-dot,
    .cursor-outline {
        display: none;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 15px;
    }
    
    .glass-card {
        padding: var(--spacing-md);
    }
    
    .team-photo {
        width: 150px;
        height: 150px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    /* Ensure text doesn't get cut off on small screens */
    p, li, span, a, label, input, textarea, select {
        line-height: 1.7 !important;
        padding-top: 0.125rem;
        padding-bottom: 0.125rem;
    }
}

/* AOS Animation Overrides */
[data-aos] {
    pointer-events: auto;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }