/* ========================================
   AICS 2026 - Conference Landing Page Styles
   ======================================== */

/* CSS Variables - Design Tokens */
:root {
    /* Primary Colors - Deep Blue/Cyan Tech Theme */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;

    /* Accent Colors - Cyan/Teal for contrast but same family */
    --accent-400: #22d3ee;
    --accent-500: #06b6d4;
    --accent-600: #0891b2;

    /* Green for sustainability theme (keeping for compatibility) */
    --green-400: #34d399;
    /* Softer teal-ish green */
    --green-500: #10b981;
    --green-600: #059669;

    /* Neutral Colors */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --gray-950: #020617;

    /* Gradients - Unified Blue Theme */
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
    --gradient-hero: linear-gradient(135deg, #020617 0%, #1e3a8a 50%, #0f172a 100%);
    --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
    --gradient-accent: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;

    /* Spacing */
    --section-padding: clamp(60px, 10vw, 120px);
    --container-max: 1280px;
    --container-padding: clamp(20px, 5vw, 40px);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;

    /* 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 -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.3);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scroll-padding-top: 100px;
}

body {
    font-family: var(--font-primary);
    background: var(--gray-950);
    color: var(--gray-100);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: all var(--transition-base);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 0.75rem 0;
}

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

.nav-logo {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
    text-decoration: none;
    font-family: var(--font-display);
}

.nav-logo .logo-text {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-logo .logo-year {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-400);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    color: var(--gray-300);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-400);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: width var(--transition-base);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-cta {
    background: var(--gradient-accent);
    color: white !important;
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-md);
    font-weight: 600;
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.hamburger .bar {
    width: 25px;
    height: 3px;
    background: var(--gray-300);
    border-radius: 3px;
    transition: all var(--transition-base);
}

.hamburger.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

@media (max-width: 900px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        transform: translateY(-150%);
        opacity: 0;
        transition: all var(--transition-base);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 120px var(--container-padding) 60px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
    z-index: -2;
}

.floating-shapes {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: -1;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: var(--primary-600);
    top: -200px;
    right: -200px;
    animation-delay: 0s;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-600);
    bottom: -100px;
    left: -100px;
    animation-delay: -5s;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: var(--accent-500);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

.shape-4 {
    width: 500px;
    height: 500px;
    background: var(--primary-500);
    bottom: 20%;
    right: 10%;
    animation-delay: -15s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(30px, -50px) scale(1.05);
    }

    66% {
        transform: translate(-20px, 20px) scale(0.95);
    }
}

.hero-content {
    text-align: center;
    max-width: 900px;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--primary-300);
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Hero University Logo */
.hero-logo {
    margin-bottom: 2rem;
}

.university-logo {
    max-width: 280px;
    height: auto;
    filter: brightness(1.1);
    transition: transform var(--transition-base);
}

.university-logo:hover {
    transform: scale(1.02);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(4rem, 15vw, 10rem);
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.title-line {
    display: block;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-300) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-accent {
    display: block;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--gray-50);
    /* Much lighter */
    font-weight: 600;
    /* Bolder */
    margin-bottom: 1.5rem;
    letter-spacing: 0.05em;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.8);
    /* Stronger shadow */
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--gray-100);
    /* Lighter */
    max-width: 700px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.6);
}

.hero-info {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

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

.info-icon {
    font-size: 1.5rem;
}

.info-text {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.info-label {
    font-size: 0.8rem;
    color: var(--gray-300);
    /* Lighter gray */
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.6);
}

.info-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: #ffffff;
    /* pure white */
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.6);
}

/* Countdown Timer */
.countdown-container {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    padding: 1rem 1.25rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    min-width: 100px;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-base);
}

.countdown-item:hover {
    transform: translateY(-5px);
    border-color: rgba(59, 130, 246, 0.3);
}

.countdown-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.countdown-label {
    font-size: 0.8rem;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-accent);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--gray-100);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.1rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-500);
    font-size: 0.85rem;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border: 2px solid var(--gray-500);
    border-radius: 50%;
    position: relative;
    animation: bounce 2s infinite;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -60%) rotate(45deg);
    width: 6px;
    height: 6px;
    border-right: 2px solid var(--gray-500);
    border-bottom: 2px solid var(--gray-500);
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateY(0);
    }

    40% {
        transform: translateY(8px);
    }

    60% {
        transform: translateY(4px);
    }
}

/* ========================================
   Key Themes Section
   ======================================== */
.themes-section {
    padding: 4rem 0;
    background: linear-gradient(180deg, var(--gray-950) 0%, var(--gray-900) 100%);
}

.themes-grid {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.theme-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.theme-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(59, 130, 246, 0.3);
    transform: translateY(-2px);
}

.theme-icon {
    font-size: 1.5rem;
}

.theme-card h3 {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray-200);
}

/* ========================================
   Section Common Styles
   ======================================== */
.section-badge {
    display: inline-block;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--gray-100);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.section-description {
    font-size: 1.15rem;
    color: var(--gray-400);
    max-width: 700px;
    margin: 0 auto 3rem;
    line-height: 1.7;
}

/* ========================================
   About Section
   ======================================== */
.about-section {
    padding: var(--section-padding) 0;
    background: var(--gray-900);
}

.about-header {
    text-align: center;
    margin-bottom: 3rem;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.about-card {
    background: var(--gradient-card);
    backdrop-filter: blur(10px);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.about-card:hover {
    border-color: rgba(59, 130, 246, 0.3);
    transform: translateY(-5px);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.about-card h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: 1rem;
}

.about-card p {
    color: var(--gray-400);
    line-height: 1.7;
}

.about-card ul {
    list-style: none;
    color: var(--gray-400);
}

.about-card ul li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.about-card ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-400);
}

.attendees-section {
    text-align: center;
}

.attendees-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: 2rem;
}

.attendees-grid {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.attendee-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.03);
    padding: 0.75rem 1.25rem;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.9rem;
    color: var(--gray-300);
    transition: all var(--transition-base);
}

.attendee-badge:hover {
    background: rgba(34, 197, 94, 0.1);
    border-color: rgba(34, 197, 94, 0.3);
}

/* ========================================
   Tracks Section
   ======================================== */
.tracks-section {
    padding: var(--section-padding) 0;
    background: var(--gray-950);
    text-align: center;
}

.tracks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.track-card {
    background: var(--gradient-card);
    padding: 2rem;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    text-align: left;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.track-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.track-card:hover {
    border-color: rgba(34, 197, 94, 0.3);
    transform: translateY(-5px);
}

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

.track-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.5;
    margin-bottom: 0.5rem;
}

.track-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.track-topics {
    list-style: none;
    color: var(--gray-400);
    font-size: 0.9rem;
}

.track-topics li {
    padding: 0.4rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.track-topics li:last-child {
    border-bottom: none;
}

/* ========================================
   Call for Papers Section
   ======================================== */
.cfp-section {
    padding: var(--section-padding) 0;
    background: linear-gradient(180deg, var(--gray-900) 0%, var(--gray-950) 100%);
    text-align: center;
}

.cfp-content {
    margin-top: 3rem;
}

.paper-types h3,
.timeline h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: 1.5rem;
}

.paper-type-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 4rem;
}

.paper-type-card {
    background: var(--gradient-card);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.paper-type-card:hover {
    border-color: rgba(34, 197, 94, 0.3);
}

.paper-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
    display: block;
}

.paper-type-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: 0.25rem;
}

.paper-type-card p {
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* Timeline */
.timeline {
    margin-bottom: 4rem;
}

.timeline-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    position: relative;
}

.timeline-item {
    background: var(--gradient-card);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    transition: all var(--transition-base);
}

.timeline-item:hover {
    border-color: rgba(34, 197, 94, 0.3);
    transform: translateY(-3px);
}

.timeline-item.highlight {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
    border-color: rgba(34, 197, 94, 0.4);
}

.timeline-date {
    display: inline-block;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.timeline-content h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: 0.25rem;
}

.timeline-content p {
    font-size: 0.8rem;
    color: var(--gray-500);
}

/* Submission Info */
.submission-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.info-box {
    background: var(--gradient-card);
    padding: 2rem;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    text-align: left;
}

.info-box h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: 1rem;
}

.info-box ul {
    list-style: none;
    color: var(--gray-400);
}

.info-box ul li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
}

.info-box ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--green-500);
}

.info-box p {
    color: var(--gray-400);
    line-height: 1.7;
}

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

/* ========================================
   Registration Table
   ======================================== */
.registration-table-wrapper {
    overflow-x: auto;
    margin-top: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.02);
    box-shadow: var(--shadow-md);
}

.premium-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.95rem;
}

.premium-table th {
    background: var(--gradient-card);
    padding: 1.25rem 1rem;
    color: var(--gray-100);
    font-weight: 600;
    border-bottom: 2px solid var(--primary-500);
    white-space: nowrap;
}

.premium-table td {
    padding: 1rem;
    color: var(--gray-300);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: background var(--transition-fast);
}

.premium-table tbody tr {
    transition: all var(--transition-fast);
}

.premium-table tbody tr:hover {
    background: rgba(59, 130, 246, 0.05);
}

.premium-table tbody tr:hover td {
    color: var(--gray-100);
}

.premium-table tbody tr:last-child td {
    border-bottom: none;
}

.price-val {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--accent-400);
}

.premium-table tbody tr:hover .price-val {
    color: var(--accent-300);
    text-shadow: 0 0 10px rgba(34, 211, 238, 0.3);
}


/* ========================================
   Venue Section
   ======================================== */
.venue-section {
    padding: var(--section-padding) 0;
    background: var(--gray-900);
    text-align: center;
}

.venue-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
    text-align: left;
    margin-top: 3rem;
}

@media (max-width: 900px) {
    .venue-content {
        grid-template-columns: 1fr;
    }
}

.venue-card {
    background: var(--gradient-card);
    padding: 2rem;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    margin-bottom: 2rem;
}

.venue-card h3 {
    font-size: 1.1rem;
    color: var(--gray-400);
    margin-bottom: 0.5rem;
}

.venue-name {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-100);
    margin-bottom: 0.25rem;
}

.venue-location {
    color: var(--primary-400);
    font-weight: 500;
}

.why-edinburgh {
    margin-bottom: 2rem;
}

.why-edinburgh h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: 1rem;
}

.edinburgh-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--gray-300);
    font-size: 0.95rem;
}

.feature-icon {
    font-size: 1.25rem;
}

.travel-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: 1rem;
}

.travel-info ul {
    list-style: none;
    color: var(--gray-400);
}

.travel-info ul li {
    margin-bottom: 0.75rem;
}

.travel-info ul li strong {
    color: var(--gray-200);
}

.venue-map {
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.map-placeholder {
    background: var(--gray-800);
    min-height: 400px;
}

/* ========================================
   Committees Section
   ======================================== */
.committees-section {
    padding: var(--section-padding) 0;
    background: var(--gray-950);
    text-align: center;
}

.committees-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.committee-card {
    background: var(--gradient-card);
    padding: 2rem;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    text-align: left;
}

.committee-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.committee-members {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.member {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.member-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    color: white;
    flex-shrink: 0;
}

.member-info {
    display: flex;
    flex-direction: column;
}

.member-name {
    font-weight: 600;
    color: var(--gray-100);
}

.member-affiliation {
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* ========================================
   Quick Links Section
   ======================================== */
.quick-links-section {
    padding: 4rem 0;
    background: linear-gradient(180deg, var(--gray-950) 0%, var(--gray-900) 100%);
    text-align: center;
}

.quick-links-section h2 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: 2rem;
}

.quick-links-grid {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.quick-link-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--gradient-card);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    text-decoration: none;
    color: var(--gray-200);
    font-weight: 500;
    transition: all var(--transition-base);
}

.quick-link-card:hover {
    border-color: rgba(34, 197, 94, 0.4);
    background: rgba(34, 197, 94, 0.1);
    transform: translateY(-3px);
}

.ql-icon {
    font-size: 1.25rem;
}

/* ========================================
   Previous Conference Section
   ======================================== */
.prev-conf-section {
    padding: var(--section-padding) 0;
    background: linear-gradient(180deg, var(--gray-900) 0%, var(--gray-950) 100%);
    text-align: center;
}

.prev-conf-card {
    position: relative;
    background: var(--gradient-card);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: var(--radius-xl);
    padding: 3rem;
    margin-top: 2.5rem;
    text-align: left;
    overflow: hidden;
    transition: transform var(--transition-base), border-color var(--transition-base);
    box-shadow: var(--shadow-xl);
}

.prev-conf-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.prev-conf-card:hover {
    transform: translateY(-4px);
    border-color: rgba(59, 130, 246, 0.25);
}

.prev-conf-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--gradient-accent);
    color: white;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.35rem 1rem;
    border-radius: 999px;
    margin-bottom: 1.5rem;
}

.prev-conf-title {
    font-family: var(--font-display);
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    font-weight: 700;
    color: var(--gray-100);
    margin-bottom: 1.25rem;
    line-height: 1.3;
}

.prev-conf-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 2rem;
    margin-bottom: 1.5rem;
}

.prev-meta-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--gray-400);
    font-size: 0.9rem;
}

.prev-meta-icon {
    font-size: 1rem;
}

.prev-conf-desc {
    color: var(--gray-400);
    line-height: 1.75;
    margin-bottom: 2rem;
    max-width: 800px;
}

.prev-conf-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: 0.5rem 1rem;
    color: var(--gray-300);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.highlight-item:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
    color: var(--gray-100);
}

.highlight-icon {
    font-size: 1.1rem;
}

.prev-conf-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

@media (max-width: 768px) {
    .prev-conf-card {
        padding: 2rem;
    }

    .prev-conf-meta {
        gap: 0.75rem 1rem;
    }
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--gray-900);
    padding: 4rem 0 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

.footer-brand {
    max-width: 350px;
}

.footer-logo {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
    font-family: var(--font-display);
    margin-bottom: 1rem;
}

.footer-logo .logo-text {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-logo .logo-year {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-400);
}

.footer-brand p {
    color: var(--gray-400);
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.footer-location {
    color: var(--primary-400) !important;
    font-weight: 500;
}

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

@media (max-width: 600px) {
    .footer-links {
        grid-template-columns: 1fr 1fr;
    }
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: 1rem;
}

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

.footer-column ul li {
    margin-bottom: 0.5rem;
}

.footer-column ul a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-column ul a:hover {
    color: var(--primary-400);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    color: var(--gray-500);
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
}

/* ========================================
   Responsive Adjustments
   ======================================== */
@media (max-width: 640px) {
    .hero-info {
        flex-direction: column;
        align-items: center;
    }

    .info-card {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

    .edinburgh-features {
        grid-template-columns: 1fr;
    }

    .timeline-container {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Utility Classes
   ======================================== */
.text-gradient {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ========================================
   Hero Slideshow
   ======================================== */
.hero-slideshow {
    position: absolute;
    inset: 0;
    z-index: -3;
}

.hero-slideshow .slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
}

.hero-slideshow .slide.active {
    opacity: 1;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
            rgba(15, 23, 42, 0.6) 0%,
            rgba(30, 41, 59, 0.55) 50%,
            rgba(30, 58, 138, 0.6) 100%);
    z-index: -2;
}

/* ========================================
   Edinburgh Gallery
   ======================================== */
.edinburgh-gallery {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.gallery-item {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.gallery-item.active {
    display: block;
}

.gallery-item img {
    width: 100%;
    height: 350px;
    object-fit: cover;
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.gallery-controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 1rem;
    pointer-events: none;
}

.gallery-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    transition: all var(--transition-base);
    pointer-events: auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gallery-btn:hover {
    background: rgba(59, 130, 246, 0.7);
    border-color: var(--primary-400);
    transform: scale(1.1);
}

.gallery-dots {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.5rem;
}

.gallery-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all var(--transition-base);
}

.gallery-dots .dot.active {
    background: var(--primary-400);
    transform: scale(1.2);
}

.gallery-dots .dot:hover {
    background: rgba(255, 255, 255, 0.7);
}

/* ========================================
   Committees Section Styles
   ======================================== */
.committees-content {
    max-width: 1000px;
    margin: 0 auto;
}

.committee-group-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 4vw, 2rem);
    color: var(--primary-400);
    margin-bottom: 2rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 3rem;
}

.committee-group-title:first-child {
    margin-top: 0;
}

.committee-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.committee-role {
    background: rgba(255, 255, 255, 0.03);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.committee-role:hover {
    border-color: rgba(59, 130, 246, 0.3);
    background: rgba(255, 255, 255, 0.05);
}

.committee-role h4 {
    color: var(--gray-100);
    margin-bottom: 1rem;
    font-size: 1.1rem;
    font-weight: 600;
    font-family: var(--font-display);
}

.committee-role ul {
    list-style: none;
    padding: 0;
}

.committee-role ul li {
    color: var(--gray-400);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    line-height: 1.5;
}

.member-list ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.member-list ul li {
    color: var(--gray-400);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    padding-left: 1rem;
    border-left: 2px solid var(--primary-500);
    break-inside: avoid;
}

@media (max-width: 768px) {
    .member-list {
        columns: 2 !important;
    }
}

@media (max-width: 480px) {
    .member-list {
        columns: 1 !important;
    }
}