/* ===================================
   ULTRA MODERN QISKIT FALL FEST 2025
   =================================== */

/* Modern CSS Reset */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Modern Color Palette */
    --primary: #667eea;
    --secondary: #764ba2;
    --accent: #f093fb;
    --quantum: #4facfe;
    --dark: #0f0f23;
    --darker: #020024;
    --light: #ffffff;
    --gray: #8892b0;
    --light-gray: #f8f9fa;
    
    /* Modern Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-hero: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-dark: linear-gradient(135deg, #0f0f23 0%, #020024 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
    
    /* Modern Typography */
    --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Fira Code', 'Consolas', monospace;
    
    /* Modern Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    --space-4xl: 8rem;
    --space-5xl: 12rem;
    
    /* Section Spacing */
    --section-padding: 8rem 0;
    --section-gap: 4rem;
    --container-max-width: 1200px;
    --container-padding: 0 2rem;
    
    /* Modern Borders */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Modern Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.25);
    --shadow-quantum: 0 8px 32px rgba(79, 172, 254, 0.3);
}

/* Modern Base Styles */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    line-height: 1.7;
    color: var(--light);
    background: var(--gradient-dark);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== GLOBAL SECTION SPACING ===== */
section {
    margin-bottom: var(--space-5xl);
}

section:last-child {
    margin-bottom: 0;
}

/* General section styling */
.section {
    padding: var(--section-padding);
}

.section + .section {
    margin-top: var(--space-4xl);
}

/* Modern Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, rgba(45, 35, 80, 0.9), rgba(30, 25, 60, 0.95)) !important;
    backdrop-filter: blur(20px) !important;
    -webkit-backdrop-filter: blur(20px) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
    overflow: hidden;
    display: flex;
    flex-wrap: wrap;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    height: 160px;
}
.badge-img {
    width: 120px; /* Adjust size as needed */
    height: auto;
    display: block;
    margin: 0 auto 20px; /* centers the image and adds spacing */
}
.nav-brand {
    margin-right: var(--space-xl);
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-logo {
    height: 140px;
    width: auto;
    object-fit: contain;
    /* IMPORTANT: Aucune rotation, transformation ou modification */
    /* Garder l'image originale exactement comme elle est */
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-link {
    color: var(--gray);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-hero);
    transition: width 0.3s ease;
}

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

.nav-cta {
    background: var(--gradient-primary) !important;
    color: var(--light) !important;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-weight: 600;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

/* Modern Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: url('../images/Full_Illustration.png') center/cover no-repeat;
    background-attachment: fixed;
    padding: var(--space-4xl) 0;
    margin-bottom: var(--space-5xl);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(15, 15, 35, 0.8), rgba(2, 0, 36, 0.6));
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: var(--space-2xl);
    background: var(--gradient-glass);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-xl);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    background: var(--gradient-accent);
    color: var(--light);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--space-xl);
    box-shadow: var(--shadow-md);
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--space-md);
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--gray);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.8s ease 0.6s both;
}

.hero-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--light);
    margin-bottom: var(--space-md);
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.8s both;
}

.hero-location {
    font-size: 1rem;
    color: var(--accent);
    margin-bottom: var(--space-xl);
    font-weight: 600;
    animation: fadeInUp 0.8s ease 1s both;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 1.2s both;
}

/* ===== COUNTDOWN TIMER ===== */
.countdown-container {
    margin: var(--space-xl) 0;
    text-align: center;
    animation: fadeInUp 0.8s ease 0.8s both;
}

.countdown-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--light);
    margin-bottom: var(--space-lg);
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.countdown {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.countdown-item {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    min-width: 80px;
    transition: all 0.3s ease;
}

.countdown-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
    box-shadow: var(--shadow-quantum);
}

.countdown-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--light);
    font-family: var(--font-heading);
    line-height: 1;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.countdown-label {
    display: block;
    font-size: 0.875rem;
    color: var(--gray);
    margin-top: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

@media (max-width: 768px) {
    .countdown {
        gap: var(--space-md);
    }
    
    .countdown-item {
        min-width: 70px;
        padding: var(--space-md);
    }
    
    .countdown-number {
        font-size: 1.5rem;
    }
    
    .countdown-title {
        font-size: 1.25rem;
    }
}

/* Modern Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--light);
    box-shadow: var(--shadow-md);
}

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

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--quantum);
    color: var(--quantum);
}

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

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

.section-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: var(--space-2xl);
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: var(--space-xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

/* === Sponsors: ensure logos are visible on white cards === */
.sponsor-card img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: contain; /* keep full logo visible */
    background: #ffffff; /* contrast with card */
    border: 1px solid rgba(0,0,0,0.08);
    padding: 8px;
    display: block;
    margin: 0 auto 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.section-description {
    font-size: 1.2rem;
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto var(--space-xl) auto;
    line-height: 1.6;
    line-height: 1.7;
}

/* Modern Cards */
.card {
    background: var(--gradient-glass);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-hero);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.card:hover::before {
    transform: scaleX(1);
}

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

/* Modern Grid */
.grid {
    display: grid;
    gap: var(--space-xl);
}

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

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

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

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-hero);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-2xl);
    display: flex;
    align-items: center;
}

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

.timeline-marker {
    position: relative;
    z-index: 2;
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 var(--space-lg);
    box-shadow: var(--shadow-quantum);
    font-weight: 700;
    color: var(--light);
}

.timeline-content {
    flex: 1;
    max-width: 350px;
    background: var(--gradient-glass);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-lg);
}

/* Modern Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Modern Responsive */
@media (max-width: 768px) {
    :root {
        --section-padding: 4rem 0;
        --space-5xl: 6rem;
        --space-4xl: 4rem;
    }
    
    .nav-menu {
        gap: var(--space-md);
    }
    
    .hero-content {
        padding: var(--space-lg);
        margin: var(--space-md);
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
        gap: var(--space-md);
    }
    
    .team-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .timeline-item {
        flex-direction: column;
        text-align: center;
        gap: var(--space-lg);
    }
    
    .timeline-marker {
        margin-bottom: 0;
    }
    
    .container {
        padding: 0 var(--space-md);
    }
}

@media (max-width: 480px) {
    :root {
        --space-lg: 1rem;
        --space-xl: 2rem;
        --space-2xl: 3rem;
    }
    
    .hero-content {
        padding: var(--space-md);
    }
    
    .container {
        padding: 0 var(--space-md);
    }
}

/* Modern Focus States */
.btn:focus,
.nav-link:focus {
    outline: 2px solid var(--quantum);
    outline-offset: 2px;
}

/* Modern Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--gradient-hero);
}

/* Modern Selection */
::selection {
    background: var(--quantum);
    color: var(--light);
}

/* Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.hidden { display: none; }
.block { display: block; }
.flex { display: flex; }
.grid { display: grid; }

/* ===== ABOUT SECTION ===== */
.about {
    padding: var(--section-padding);
    margin: var(--space-5xl) 0;
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.05) 0%, rgba(0, 242, 254, 0.05) 100%);
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/Full_Illustration.png') center/cover;
    opacity: 0.03;
    z-index: 0;
}

.about .container {
    position: relative;
    z-index: 1;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
    margin-top: var(--space-2xl);
}

.about-text {
    padding-right: var(--space-lg);
}

.about-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--light);
    text-align: justify;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-lg);
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.about-image {
    max-width: 300px;
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    transition: transform 0.3s ease;
}

.about-image:hover {
    transform: scale(1.02);
}

/* About Section Responsive */
@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
        text-align: center;
    }
    
    .about-text {
        padding-right: 0;
    }
    
    .about-description {
        text-align: left;
    }
}

/* ===== TEAM ORGANIZERS SECTION ===== */
.team-organizers {
    padding: var(--section-padding);
    margin: var(--space-5xl) 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    position: relative;
    overflow: hidden;
}

.team-organizers::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 70%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 30%, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-2xl);
    margin-top: 0;
    position: relative;
    z-index: 2;
}

.team-card.featured {
    grid-column: span 1;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%);
    border-color: rgba(102, 126, 234, 0.3);
    transform: scale(1.02);
}

@media (min-width: 1200px) {
    .team-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .team-card.featured {
        grid-column: 1 / -1;
        display: flex;
        align-items: center;
        gap: var(--space-2xl);
        text-align: left;
    }
    
    .team-card.featured .team-avatar {
        flex-shrink: 0;
        margin-bottom: 0;
    }
    
    .team-card.featured .team-info {
        flex-grow: 1;
    }
}

.team-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    margin-bottom: var(--space-lg);
}

.team-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.team-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 60px rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.3);
}

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

.team-card.featured {
    grid-column: span 2;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%);
    border-color: rgba(102, 126, 234, 0.3);
}

@media (max-width: 768px) {
    .team-card.featured {
        grid-column: span 1;
    }
}

.team-avatar {
    width: 120px;
    height: 120px;
    margin-bottom: 1.5rem;
    position: relative;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid transparent;
    background: var(--gradient-primary);
    padding: 4px;
}

.avatar-image {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.3s ease;
}

.team-card:hover .avatar-image {
    transform: scale(1.05);
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.5rem;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.team-info h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--light);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.team-bio {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray);
    margin-bottom: 1.5rem;
    font-style: italic;
}

.team-social {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.social-link {
    padding: 0.6rem 1.2rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 25px;
    color: var(--text-dark);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.social-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    transition: left 0.3s ease;
    z-index: -1;
}

.social-link:hover::before {
    left: 0;
}

.social-link:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
    border-color: transparent;
}

.team-decoration {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    opacity: 0.1;
    z-index: 1;
}

.team-logo {
    width: 100px;
    height: auto;
    filter: grayscale(1) brightness(0.5);
}

/* ===== INTERACTIVE SCHEDULE SECTION ===== */
.interactive-schedule {
    padding: var(--section-padding);
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    position: relative;
    overflow: hidden;
}

.interactive-schedule::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/Full_Illustration.png') center/cover;
    opacity: 0.02;
    z-index: 0;
}

.schedule-interactive {
    position: relative;
    z-index: 1;
    max-width: 1000px;
    margin: 0 auto;
}

/* Schedule Tabs */
.schedule-tabs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-3xl);
}

.tab-button {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    color: var(--light);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.tab-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.tab-button:hover::before,
.tab-button.active::before {
    opacity: 1;
}

.tab-button:hover,
.tab-button.active {
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-5px);
    box-shadow: var(--shadow-quantum);
}

.tab-day {
    font-size: 1.2rem;
    font-weight: 700;
    font-family: var(--font-heading);
    margin-bottom: var(--space-xs);
}

.tab-date {
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: var(--space-xs);
}

.tab-theme {
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent);
}

/* Schedule Content */
.schedule-content {
    position: relative;
    min-height: 600px;
}

.day-content {
    display: none;
    animation: fadeInUp 0.5s ease;
}

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

.day-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-2xl);
    padding: var(--space-lg);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.day-header h3 {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--light);
    margin: 0;
}

.date-badge {
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Events Timeline */
.events-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.event-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--space-lg);
    align-items: start;
    padding: var(--space-lg);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    position: relative;
}

.event-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.event-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(10px);
    box-shadow: var(--shadow-lg);
}

.event-item:hover::before {
    opacity: 1;
}

.event-time {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--quantum);
    font-size: 0.9rem;
    background: rgba(79, 172, 254, 0.1);
    padding: var(--space-xs);
    border-radius: var(--radius-sm);
    text-align: center;
    border: 1px solid rgba(79, 172, 254, 0.2);
}

.event-details h4 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    color: var(--light);
    margin-bottom: var(--space-xs);
}

.event-details p {
    color: var(--gray);
    margin-bottom: var(--space-sm);
    line-height: 1.6;
}

.event-type {
    display: inline-block;
    background: var(--gradient-accent);
    color: white;
    padding: 2px var(--space-xs);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .schedule-tabs {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-sm);
    }
    
    .tab-button {
        padding: var(--space-md);
    }
    
    .tab-day {
        font-size: 1rem;
    }
    
    .day-header {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
    
    .day-header h3 {
        font-size: 1.5rem;
    }
    
    .event-item {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .event-time {
        justify-self: start;
        max-width: 120px;
    }
}

/* ===== FOOTER SECTION ===== */
.footer {
    background: linear-gradient(135deg, var(--darker) 0%, var(--dark) 100%);
    color: var(--light);
    padding: var(--space-4xl) 0 var(--space-lg) 0;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/Full_Illustration.png') center/cover;
    opacity: 0.03;
    z-index: 0;
}

.footer-content {
    position: relative;
    z-index: 1;
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-4xl);
    margin-bottom: var(--space-3xl);
}

.footer-brand h3 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-sm);
}

.footer-subtitle {
    font-size: 1.1rem;
    color: var(--quantum);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.footer-tagline {
    color: var(--gray);
    font-style: italic;
    margin-bottom: var(--space-xl);
}

.footer-contact {
    margin-top: var(--space-lg);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
    color: var(--gray);
}

.contact-item strong {
    color: var(--light);
    min-width: 60px;
}

.contact-item a {
    color: var(--quantum);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: var(--accent);
}

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

.footer-section h4 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--light);
    margin-bottom: var(--space-lg);
    position: relative;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 1px;
}

.footer-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-menu li {
    margin-bottom: var(--space-sm);
}

.footer-menu a {
    color: var(--gray);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer-menu a:hover {
    color: var(--light);
    transform: translateX(5px);
}

.info-item {
    color: var(--gray);
    display: block;
    margin-bottom: var(--space-sm);
    padding-left: var(--space-lg);
    position: relative;
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--gray);
    text-decoration: none;
    transition: all 0.3s ease;
    padding: var(--space-xs);
    border-radius: var(--radius-sm);
}

.social-link:hover {
    color: var(--light);
    background: rgba(255, 255, 255, 0.05);
    transform: translateX(5px);
}

.social-link span {
    font-size: 1.2rem;
}

.partners-mini {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.partners-mini h5 {
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.partner-logos {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.partner-name {
    color: var(--quantum);
    font-size: 0.9rem;
    font-weight: 500;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-lg);
    position: relative;
    z-index: 1;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-bottom p {
    color: var(--gray);
    margin: 0;
}

.footer-credits {
    color: var(--gray);
    font-size: 0.9rem;
    font-style: italic;
}

/* Footer Responsive */
@media (max-width: 768px) {
    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .footer-brand {
        text-align: center;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
}

/* ===== REGISTER SECTION ===== */
.register {
    padding: var(--section-padding);
    background: linear-gradient(135deg, rgba(240, 147, 251, 0.05) 0%, rgba(102, 126, 234, 0.05) 100%);
    text-align: center;
}

.register-content {
    max-width: 600px;
    margin: 0 auto;
}

.form-container {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    margin-top: var(--space-xl);
}

.form-container h3 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 600;
    color: var(--light);
    margin-bottom: var(--space-md);
}

.form-container p {
    color: var(--gray);
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

.registration-note {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.registration-note {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.registration-note p {
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: var(--space-sm);
}

/* ===== HAMBURGER MENU BUTTON ===== */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
    background: transparent;
    border: none;
    padding: 8px;
}

.nav-toggle .bar {
    width: 28px;
    height: 3px;
    background: white;
    border-radius: 3px;
    transition: all 0.3s ease;
    display: block;
}

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

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

.nav-toggle.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ===== MOBILE MENU RESPONSIVE ===== */
@media (max-width: 968px) {
    .nav-menu-desktop,
    .register-btn-desktop {
        display: none !important;
    }
    
    .nav-toggle {
        display: flex !important;
    }
}

@media (min-width: 969px) {
    .nav-toggle,
    .nav-menu-mobile {
        display: none !important;
    }
}