/* ===============================================
   ICPCES 2026 - Modern Conference Website
   Color Theme: Purple/Gold Gradient (UPCON Style)
   =============================================== */

/* CSS Variables */
:root {
    /* Primary Colors - Purple Theme */
    --primary-purple: #6b21a8;
    --primary-purple-light: #9333ea;
    --primary-purple-dark: #581c87;
    --primary-violet: #7c3aed;
    
    /* Accent Colors - Gold/Orange */
    --accent-gold: #f59e0b;
    --accent-orange: #ea580c;
    --accent-yellow: #fbbf24;
    
    /* Gradients */
    --gradient-purple: linear-gradient(135deg, #6b21a8 0%, #9333ea 50%, #c084fc 100%);
    --gradient-gold: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
    --gradient-hero: linear-gradient(135deg, rgba(107, 33, 168, 0.95) 0%, rgba(147, 51, 234, 0.85) 50%, rgba(192, 132, 252, 0.75) 100%);
    --gradient-dark: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
    
    /* Neutral Colors */
    --white: #ffffff;
    --off-white: #faf5ff;
    --light-purple: #f3e8ff;
    --gray-100: #f4f4f5;
    --gray-200: #e4e4e7;
    --gray-300: #d4d4d8;
    --gray-500: #71717a;
    --gray-600: #52525b;
    --gray-700: #3f3f46;
    --gray-800: #27272a;
    --gray-900: #18181b;
    
    /* Typography */
    --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
    
    /* Spacing */
    --section-padding: 6rem;
    --container-max: 1280px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-purple: 0 10px 40px -10px rgba(107, 33, 168, 0.3);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
}

/* Reset & Base Styles */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray-700);
    background-color: var(--white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ===============================================
   ANNOUNCEMENT BAR
   =============================================== */
.announcement-bar {
    background: var(--gradient-gold);
    padding: 0.75rem 0;
    overflow: hidden;
}

.announcement-content {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    animation: scroll-announce 30s linear infinite;
}

.announcement-item {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-900);
    white-space: nowrap;
}

.announcement-divider {
    color: rgba(0, 0, 0, 0.3);
}

@keyframes scroll-announce {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

@media (max-width: 768px) {
    .announcement-content {
        gap: 1rem;
    }
    .announcement-divider {
        display: none;
    }
    .announcement-item {
        font-size: 0.75rem;
    }
}

/* ===============================================
   NAVIGATION
   =============================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

/* Navbar offset helpers (prevent content being hidden behind fixed navbar) */
:root {
    --navbar-height: 70px; /* reduced for tighter header */
}

/* Pages that do NOT have the large hero should include top padding so content starts below the fixed navbar */
body:not(.has-hero) {
    padding-top: var(--navbar-height);
}

/* Ensure anchor navigation and in-page links account for the fixed navbar height */
section[id], .section, .page-title {
    scroll-margin-top: calc(var(--navbar-height) + 12px);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-logo img {
    height: 44px;
    width: auto;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-purple);
}

.logo-year {
    color: var(--accent-gold);
}

/* Compatibility for legacy pages that use the old `.top-navbar` markup
   (committee pages and other standalone HTML) */
.top-navbar {
    width: 100%;
    background: rgba(255,255,255,0.98);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 900;
    padding: 0.5rem 0;
}

.top-navbar .nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.top-navbar .nav-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Ensure the logo image is constrained whether the class is on the container
   or the image itself (some old pages put the `nav-logo` class directly on the <img>) */
.nav-logo img,
img.nav-logo,
.nav-left > img.nav-logo,
.top-navbar .nav-left img {
    height: 50px;
    width: auto;
    display: block;
    object-fit: contain;
    max-height: 60px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.25rem; /* tighter spacing */
}

.nav-link {
    padding: 0.35rem 0.6rem; /* reduced padding */
    font-size: 0.85rem; /* smaller text */
    font-weight: 500;
    color: var(--gray-700);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-link:hover {
    color: var(--primary-purple);
    background: var(--light-purple);
}

.nav-link svg {
    transition: var(--transition-fast);
}

.nav-dropdown {
    position: relative;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-base);
}

.dropdown-menu li a {
    display: block;
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    color: var(--gray-700);
    border-radius: var(--radius-md);
}

.dropdown-menu li a:hover {
    background: var(--light-purple);
    color: var(--primary-purple);
}

.nav-btn {
    padding: 0.5rem 1rem; /* tighter */
    background: var(--gradient-purple);
    color: var(--white) !important;
    font-weight: 600;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-purple);
    transition: var(--transition-base);
    font-size: 0.9rem;
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px -10px rgba(107, 33, 168, 0.35);
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 10px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-toggle span {
    width: 25px;
    height: 2px;
    background: var(--primary-purple);
    transition: var(--transition-base);
}

.mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

@media (max-width: 1024px) {
    .mobile-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--white);
        height: 100vh;
        flex-direction: column;
        align-items: stretch;
        padding: 1.5rem; /* reduced padding */
        gap: 0.35rem;
        transform: translateX(100%);
        transition: var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-link {
        padding: 0.9rem;
        font-size: 0.95rem;
    }
    
    .nav-dropdown .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: var(--light-purple);
        margin-top: 0.5rem;
        display: none;
    }
    
    .nav-dropdown.active .dropdown-menu {
        display: block;
    }
    
    .nav-btn {
        text-align: center;
        margin-top: 1rem;
    }
}

/* ===============================================
   HERO SECTION
   =============================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 1.5rem 60px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center !important;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
}

.hero-content {
    text-align: center;
    max-width: 900px;
    color: var(--white);
    z-index: 1;
}

.hero-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.hero-logo {
    /* default size for hero logos; some variants override this */
    height: 80px;
    width: auto;
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--radius-lg);
    padding: 0.5rem;
}

/* conference logo slightly larger for visual emphasis */
.hero-logo-left {
    height: 100px;
}

/* IEEE logo kept a bit smaller to balance */
.hero-logo.ieee-logo {
    height: 80px;
}

.springer-logo {
    height: 70px;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: var(--accent-gold);
    color: var(--gray-900);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 1.5rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-title sup {
    font-size: 1.5rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-yellow), var(--accent-gold), var(--accent-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.hero-theme {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    display: inline-block;
}

.theme-label {
    font-weight: 600;
    color: var(--accent-yellow);
}

.theme-text {
    font-style: italic;
}

.hero-info {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.hero-info-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.125rem;
    font-weight: 500;
}

.hero-info-item svg {
    color: var(--accent-yellow);
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent-gold);
    color: var(--gray-900);
    box-shadow: 0 10px 30px -10px rgba(245, 158, 11, 0.5);
}

.btn-primary:hover {
    background: var(--accent-orange);
    transform: translateY(-3px);
    box-shadow: 0 15px 40px -10px rgba(234, 88, 12, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--primary-purple);
    border: 2px solid var(--primary-purple);
}

.btn-outline:hover {
    background: var(--primary-purple);
    color: var(--white);
}

.btn-light {
    background: var(--white);
    color: var(--primary-purple);
    box-shadow: var(--shadow-lg);
}

.btn-light:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* Hero Scroll Indicator */
.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--white);
    opacity: 0.7;
    font-size: 0.875rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
    40% { transform: translateY(-10px) translateX(-50%); }
    60% { transform: translateY(-5px) translateX(-50%); }
}

@media (max-width: 768px) {
    .hero {
        padding: 100px 1rem 40px;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
        letter-spacing: 0.1em;
    }
    
    .hero-logos {
        gap: 1rem;
    }
    
    .hero-logo {
        height: 60px;
    }
    .hero-logo-left {
        height: 70px;
    }
    .hero-logo.ieee-logo {
        height: 60px;
    }
    
    .springer-logo {
        height: 50px;
    }
    
    .hero-theme {
        font-size: 0.875rem;
        padding: 0.75rem 1.25rem;
    }
    
    .hero-info {
        flex-direction: column;
        gap: 1rem;
    }
    
    .btn {
        padding: 0.875rem 1.5rem;
        font-size: 0.9rem;
    }
}

/* ===============================================
   STATS SECTION
   =============================================== */
.stats-section {
    background: var(--gradient-dark);
    padding: 4rem 0;
    margin-top: -1px;
}

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

.stat-item {
    text-align: center;
    color: var(--white);
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent-gold);
    font-family: var(--font-display);
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
    font-weight: 500;
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-label {
        font-size: 0.8rem;
    }
}

/* ===============================================
   SECTION STYLES
   =============================================== */
.section {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header.light {
    color: var(--white);
}

.section-tag {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: var(--light-purple);
    color: var(--primary-purple);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 1rem;
}

.section-header.light .section-tag {
    background: rgba(255, 255, 255, 0.15);
    color: var(--accent-yellow);
}

.section-title {
    font-family: var(--font-display);
    font-size: 2.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.section-header.light .section-title {
    color: var(--white);
}

.section-subtitle {
    font-size: 1rem;
    color: var(--gray-500);
}

.section-header.light .section-subtitle {
    color: rgba(255, 255, 255, 0.7);
}

.section-divider {
    width: 80px;
    height: 4px;
    background: var(--gradient-gold);
    margin: 1.5rem auto 0;
    border-radius: var(--radius-full);
}

@media (max-width: 768px) {
    .section {
        padding: 4rem 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .section-header {
        margin-bottom: 2.5rem;
    }
}

/* ===============================================
   ABOUT SECTION
   =============================================== */
.about-section {
    background: var(--off-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-content p {
    margin-bottom: 1.5rem;
    color: var(--gray-600);
}

.about-lead {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--gray-700) !important;
    line-height: 1.8;
}

.about-list {
    margin: 1.5rem 0;
    padding-left: 1.5rem;
}

.about-list li {
    position: relative;
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    color: var(--gray-700);
    font-weight: 500;
}

.about-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: var(--accent-gold);
    border-radius: 50%;
}

.about-cards {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-100);
    transition: var(--transition-base);
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.info-card-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-purple);
    border-radius: var(--radius-lg);
    margin-bottom: 1.25rem;
    color: var(--white);
}

.info-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
}

.info-card p {
    color: var(--gray-600);
    font-size: 0.9rem;
    line-height: 1.6;
}

@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .about-cards {
        flex-direction: row;
    }
    
    .info-card {
        flex: 1;
    }
}

@media (max-width: 640px) {
    .about-cards {
        flex-direction: column;
    }
}

/* ===============================================
   DATES SECTION (Timeline)
   =============================================== */
.dates-section {
    background: var(--gradient-purple);
    position: relative;
    overflow: hidden;
}

.dates-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 2.5rem;
    position: relative;
}

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

.timeline-item:nth-child(odd) .timeline-content {
    padding-right: 3rem;
    padding-left: 0;
}

.timeline-item:nth-child(even) .timeline-content {
    padding-left: 3rem;
}

.timeline-marker {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 50px;
    background: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-purple);
    z-index: 2;
    box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.2);
}

.timeline-marker.highlight {
    background: var(--accent-gold);
    color: var(--gray-900);
}

.timeline-content {
    width: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    color: var(--white);
}

.timeline-content.highlight {
    background: rgba(245, 158, 11, 0.2);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.timeline-date {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--accent-gold);
    color: var(--gray-900);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    margin-bottom: 0.75rem;
}

.timeline-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.timeline-content p {
    font-size: 0.9rem;
    opacity: 0.9;
}

@media (max-width: 768px) {
    .timeline::before {
        left: 25px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(odd) {
        flex-direction: column;
        text-align: left;
        padding-left: 70px;
    }
    
    .timeline-marker {
        left: 0;
        transform: none;
        width: 40px;
        height: 40px;
    }
    
    .timeline-content,
    .timeline-item:nth-child(odd) .timeline-content {
        width: 100%;
        padding: 1.25rem;
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }
}

/* ===============================================
   SPEAKERS SECTION
   =============================================== */
.speakers-section {
    background: var(--white);
}

.coming-soon-card {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    padding: 4rem 2rem;
    background: var(--light-purple);
    border-radius: var(--radius-xl);
    border: 2px dashed var(--primary-purple-light);
}

.coming-soon-icon {
    color: var(--primary-purple);
    margin-bottom: 1.5rem;
}

.coming-soon-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.coming-soon-card p {
    color: var(--gray-600);
    max-width: 400px;
    margin: 0 auto;
}

/* ===============================================
   TRACKS SECTION
   =============================================== */
.tracks-section {
    background: var(--off-white);
}

.tracks-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.track-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.track-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-purple);
}

.track-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-purple);
}

.track-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-purple);
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
    color: var(--primary-purple);
    transition: var(--transition-base);
}

.track-card:hover .track-icon {
    background: var(--gradient-purple);
    color: var(--white);
}

.track-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.track-card p {
    font-size: 0.875rem;
    color: var(--gray-600);
    line-height: 1.7;
}

.track-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--accent-gold);
    color: var(--gray-900);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    margin-top: 1.25rem;
}

@media (max-width: 1024px) {
    .tracks-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .tracks-grid {
        grid-template-columns: 1fr;
    }
}

/* ===============================================
   GUIDELINES SECTION
   =============================================== */
.guidelines-section {
    background: var(--gradient-dark);
    position: relative;
}

.guidelines-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    align-items: start;
}

.guidelines-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.guideline-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-base);
}

.guideline-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(10px);
}

.guideline-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-gold);
    font-family: var(--font-display);
    line-height: 1;
}

.guideline-text h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 0.5rem;
}

.guideline-text p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
}

.guidelines-highlight {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.highlight-card {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.3);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    text-align: center;
    color: var(--white);
}

.highlight-card svg {
    color: var(--accent-gold);
    margin-bottom: 1.5rem;
}

.highlight-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.highlight-card p {
    opacity: 0.9;
}

@media (max-width: 1024px) {
    .guidelines-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .guidelines-highlight {
        flex-direction: row;
    }
    
    .highlight-card {
        flex: 1;
    }
}

@media (max-width: 640px) {
    .guidelines-highlight {
        flex-direction: column;
    }
    
    .guideline-item {
        flex-direction: column;
        gap: 1rem;
    }
}

/* ===============================================
   SPONSORSHIP SECTION
   =============================================== */
.sponsorship-section {
    background: var(--white);
}

.sponsor-tiers {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.sponsor-tier {
    text-align: center;
    padding: 2rem 1.5rem;
    border-radius: var(--radius-xl);
    transition: var(--transition-base);
}

.sponsor-tier:hover {
    transform: translateY(-10px);
}

.sponsor-tier.platinum {
    background: linear-gradient(135deg, #e5e4e2 0%, #c0c0c0 100%);
    box-shadow: 0 10px 40px rgba(192, 192, 192, 0.4);
}

.sponsor-tier.diamond {
    background: linear-gradient(135deg, #b9f2ff 0%, #89cff0 100%);
    box-shadow: 0 10px 40px rgba(185, 242, 255, 0.4);
}

.sponsor-tier.gold {
    background: var(--gradient-gold);
    box-shadow: 0 10px 40px rgba(245, 158, 11, 0.4);
}

.sponsor-tier.silver {
    background: linear-gradient(135deg, #d1d5db 0%, #9ca3af 100%);
    box-shadow: 0 10px 40px rgba(156, 163, 175, 0.4);
}

.tier-badge {
    font-size: 1rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.tier-price {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.tier-features {
    font-size: 0.875rem;
    color: var(--gray-700);
}

.sponsors-display {
    text-align: center;
    padding: 3rem;
    background: var(--light-purple);
    border-radius: var(--radius-xl);
}

.sponsors-display h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}
.workshop-display {
     text-align: center;
    padding: 3rem;
    background: var(--light-purple);
   

}

.coming-soon-mini {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-purple);
}

@media (max-width: 1024px) {
    .sponsor-tiers {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .sponsor-tiers {
        grid-template-columns: 1fr;
    }
}

/* ===============================================
   SPONSORSHIP DISPLAY
   =============================================== */
.sponsors-display {
    text-align: center;
}
.sponsors-grid {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin: 1rem 0 1.5rem;
}
.sponsor-item {
    width: 160px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: #f7f7fb;
    box-shadow: 0 2px 6px rgba(0,0,0,0.06);
    padding: 0.75rem;
}
.sponsor-logo {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
}
.sponsor-placeholder {
    color: #6b7280;
    font-weight: 600;
    background: linear-gradient(135deg,#fff,#f3f4f6);
    border: 1px dashed #d1d5db;
}
.coming-soon-badge {
    background: #fff3cd;
    color: #92400e;
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    font-size: 0.9rem;
    margin-left: 0.5rem;
    vertical-align: middle;
}

/* ===============================================
   TEAM / WEB TEAM STYLES
   =============================================== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
    align-items: start;
}
.profile-card {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(15,23,42,0.06);
    display: flex;
    gap: 1.25rem;
    padding: 1.25rem;
    align-items: center;
}
.profile-image-wrap {
    flex: 0 0 96px;
    width: 96px;
    height: 96px;
    border-radius: 10px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(180deg,#f8fafc,#eef2ff);
}
.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.profile-details {
    flex: 1;
}
.profile-name { margin: 0; font-size: 1.125rem; font-weight: 700; }
.profile-role { margin: 0.2rem 0; color: #6b7280; font-weight: 600; }
.profile-bio { margin: 0.5rem 0; color: #374151; }
.profile-actions { margin-top: 0.5rem; }
.social-btn { display: inline-flex; width: 36px; height: 36px; align-items: center; justify-content: center; border-radius: 8px; background: #111827; color: #fff; margin-right: 0.5rem; text-decoration: none; }

@media (max-width: 640px) {
    .profile-card { padding: 1rem; }
    .profile-image-wrap { width: 72px; height: 72px; }
}

/* ===============================================
   CONTACT SECTION
   =============================================== */
.contact-section {
    background: var(--off-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.contact-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: var(--transition-base);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-purple);
}

.contact-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-purple);
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    color: var(--white);
}

.contact-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
}

.contact-list {
    text-align: left;
}

.contact-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.contact-list li:last-child {
    border-bottom: none;
}

.contact-list strong {
    color: var(--gray-800);
    font-weight: 600;
}

.contact-list a {
    color: var(--primary-purple);
    font-weight: 500;
}

.contact-list a:hover {
    color: var(--primary-purple-dark);
}

.venue-text {
    color: var(--gray-600);
    line-height: 1.8;
}

@media (max-width: 1024px) {
    .contact-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
}

/* ===============================================
   FOOTER
   =============================================== */
.footer {
    background: var(--gradient-dark);
    padding: 4rem 0 2rem;
    color: var(--white);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    max-width: 280px;
}

.footer-logo {
    height: 60px;
    margin-bottom: 1rem;
}

.footer-brand h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    font-size: 0.9rem;
    opacity: 0.8;
}

.footer-links h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--accent-gold);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    font-size: 0.9rem;
    opacity: 0.8;
    transition: var(--transition-base);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--accent-gold);
}

.footer-bottom {
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom p {
    font-size: 0.875rem;
    opacity: 0.8;
}

.footer-bottom a {
    color: var(--accent-gold);
    font-weight: 600;
}

.footer-bottom a:hover {
    text-decoration: underline;
}

@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-brand {
        grid-column: span 2;
        max-width: none;
        text-align: center;
        margin-bottom: 1rem;
    }
    
    .footer-logo {
        margin: 0 auto 1rem;
    }
}

@media (max-width: 640px) {
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand {
        grid-column: span 1;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* ===============================================
   UTILITIES & ANIMATIONS
   =============================================== */

/* Scroll animations */
[data-aos] {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* Selection */
::selection {
    background: var(--primary-purple);
    color: var(--white);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-purple);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-purple-dark);
}

/* Focus styles */
a:focus,
button:focus {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .navbar,
    .hero-scroll,
    .announcement-bar {
        display: none;
    }
    
    body {
        color: black;
    }
}