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

:root {
    --primary: #2DD4BF;
    --primary-dark: #14B8A6;
    --secondary: #F472B6;
    --accent: #FBBF24;
    --dark: #0F172A;
    --gray: #64748B;
    --light: #F8FAFC;
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: var(--dark);
    background: white;
    overflow-x: hidden;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.06);
    transition: all 0.3s;
}

.header.scrolled {
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 48px;
    height: 72px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s;
}

.logo:hover {
    transform: scale(1.05);
}

.logo-image {
    height: 48px;
    width: auto;
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(45, 212, 191, 0.2);
    transition: all 0.3s;
}

.logo:hover .logo-image {
    box-shadow: 0 6px 16px rgba(45, 212, 191, 0.3);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-title {
    font-size: 18px;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -0.3px;
}

.logo-subtitle {
    font-size: 11px;
    font-weight: 600;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.logo-dot {
    width: 8px;
    height: 8px;
    background: var(--secondary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.7; }
}

.menu {
    display: flex;
    list-style: none;
    gap: 8px;
    align-items: center;
}

.menu-item {
    position: relative;
}

.menu-link {
    text-decoration: none;
    color: var(--gray);
    font-weight: 600;
    font-size: 15px;
    transition: color 0.2s;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 6px;
    border-radius: 8px;
    position: relative;
}

.menu-link:hover {
    color: var(--primary);
    background: rgba(45, 212, 191, 0.08);
}

.menu-link .arrow {
    font-size: 10px;
    transition: transform 0.3s;
}

.menu-item:hover .arrow {
    transform: rotate(180deg);
}

/* Dropdown */
.dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
    border: 1px solid rgba(0,0,0,0.06);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

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

.dropdown-item {
    display: block;
    padding: 14px 20px;
    color: var(--gray);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
    position: relative;
}

.dropdown-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 60%;
    background: var(--primary);
    transition: width 0.3s;
}

.dropdown-item:hover {
    background: rgba(45, 212, 191, 0.08);
    color: var(--primary);
    padding-left: 28px;
}

.dropdown-item:hover::before {
    width: 4px;
}

.dropdown-divider {
    height: 1px;
    background: rgba(0,0,0,0.06);
    margin: 4px 0;
}

.btn-nav {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 12px 28px;
    border-radius: 10px;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(45, 212, 191, 0.3);
    margin-left: 12px;
}

.btn-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(45, 212, 191, 0.4);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

/* Mobile Menu Toggle */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

.mobile-toggle span {
    width: 24px;
    height: 3px;
    background: var(--dark);
    border-radius: 2px;
    transition: all 0.3s;
}

/* Hero */
.hero {
    position: relative;
    min-height: calc(100vh - 72px);
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    align-items: center;
    padding: 0 48px;
    max-width: 1400px;
    margin: 0 auto;
    gap: 80px;
}

.hero-content {
    padding: 60px 0;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, rgba(45, 212, 191, 0.1), rgba(244, 114, 182, 0.1));
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 24px;
    border: 1px solid rgba(45, 212, 191, 0.2);
}

.hero-tag span {
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    animation: blink 1.5s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.hero h1 {
    font-size: 76px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 28px;
    letter-spacing: -2px;
}

.hero h1 .gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 19px;
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 40px;
    max-width: 560px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
}

.btn {
    padding: 18px 36px;
    border-radius: 14px;
    font-weight: 700;
    font-size: 16px;
    text-decoration: none;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 8px 24px rgba(45, 212, 191, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(45, 212, 191, 0.4);
}

.btn-secondary {
    background: white;
    color: var(--dark);
    border: 2px solid var(--dark);
}

.btn-secondary:hover {
    background: var(--dark);
    color: white;
}

.quick-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.stat-mini {
    background: var(--light);
    padding: 20px 24px;
    border-radius: 16px;
    border: 1px solid rgba(0,0,0,0.06);
    transition: all 0.3s;
}

.stat-mini:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.stat-mini .label {
    font-size: 13px;
    font-weight: 600;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.stat-mini .value {
    font-size: 32px;
    font-weight: 800;
    color: var(--dark);
    line-height: 1;
}

.hero-panel {
    position: relative;
}

.info-card {
    background: white;
    border-radius: 24px;
    padding: 36px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.12);
    border: 1px solid rgba(0,0,0,0.06);
    position: relative;
    overflow: hidden;
}

.info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}

.info-card h3 {
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--primary);
    margin-bottom: 28px;
}

.countdown-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 28px;
    padding-bottom: 28px;
    border-bottom: 1px solid rgba(0,0,0,0.06);
}

.countdown-box {
    text-align: center;
    background: var(--light);
    padding: 20px;
    border-radius: 12px;
}

.countdown-num {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 6px;
}

.countdown-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--gray);
    text-transform: uppercase;
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    border-bottom: 1px solid rgba(0,0,0,0.06);
}

.info-row:last-child {
    border-bottom: none;
}

.info-row .label {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray);
}

.info-row .value {
    font-size: 18px;
    font-weight: 800;
    color: var(--dark);
}

/* Features */
.features {
    padding: 120px 48px;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    max-width: 640px;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    background: linear-gradient(135deg, rgba(45, 212, 191, 0.1), rgba(244, 114, 182, 0.1));
    color: var(--primary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -1.5px;
}

.section-desc {
    font-size: 18px;
    color: var(--gray);
    line-height: 1.7;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: white;
    border: 2px solid rgba(0,0,0,0.06);
    border-radius: 20px;
    padding: 40px;
    transition: all 0.4s;
    position: relative;
}

.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(45, 212, 191, 0.05), rgba(244, 114, 182, 0.05));
    border-radius: 20px;
    opacity: 0;
    transition: opacity 0.4s;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: 0 16px 40px rgba(45, 212, 191, 0.15);
}

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

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

.feature-icon {
    font-size: 52px;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 22px;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--dark);
}

.feature-desc {
    font-size: 15px;
    color: var(--gray);
    line-height: 1.7;
}

/* Sponsors */
.sponsors {
    padding: 100px 48px;
    background: var(--light);
}

.sponsors .section-header {
    text-align: center;
    max-width: 100%;
    margin: 0 auto 48px;
}

.sponsors-container {
    max-width: 1400px;
    margin: 0 auto;
}

.sponsors-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 48px;
    background: white;
    padding: 6px;
    border-radius: 16px;
    border: 2px solid rgba(0,0,0,0.06);
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.sponsor-tab {
    padding: 12px 28px;
    background: transparent;
    border: none;
    border-radius: 12px;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 14px;
    font-weight: 700;
    color: var(--gray);
    cursor: pointer;
    transition: all 0.2s;
}

.sponsor-tab.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 12px rgba(45, 212, 191, 0.3);
}

.sponsors-content {
    display: none;
}

.sponsors-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.sponsors-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
}

.sponsor-card {
    background: white;
    border: 2px solid rgba(0,0,0,0.06);
    border-radius: 16px;
    padding: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1;
    transition: all 0.3s;
}

.sponsor-card:hover {
    border-color: var(--primary);
    transform: scale(1.05);
    box-shadow: 0 8px 24px rgba(45, 212, 191, 0.15);
}

.sponsor-placeholder {
    font-size: 13px;
    font-weight: 600;
    color: var(--gray);
}

/* Gallery */
.gallery {
    padding: 120px 48px;
    max-width: 1400px;
    margin: 0 auto;
}

.gallery-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 56px;
}

.gallery-tabs {
    display: flex;
    gap: 8px;
    background: white;
    padding: 6px;
    border-radius: 16px;
    border: 2px solid rgba(0,0,0,0.06);
}

.tab {
    padding: 12px 24px;
    background: transparent;
    border: none;
    border-radius: 12px;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 14px;
    font-weight: 700;
    color: var(--gray);
    cursor: pointer;
    transition: all 0.2s;
}

.tab.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 12px rgba(45, 212, 191, 0.3);
}

.gallery-content {
    display: none;
}

.gallery-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.gallery-item {
    aspect-ratio: 1;
    background: var(--light);
    border: 2px solid rgba(0,0,0,0.06);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 56px;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.gallery-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(45, 212, 191, 0.9), rgba(244, 114, 182, 0.9));
    opacity: 0;
    transition: opacity 0.3s;
}

.gallery-item:hover {
    transform: scale(1.05);
    border-color: var(--primary);
    box-shadow: 0 12px 32px rgba(45, 212, 191, 0.2);
}

.gallery-item:hover::after {
    opacity: 1;
}

.btn-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: white;
    border: 2px solid rgba(0,0,0,0.06);
    border-radius: 12px;
    color: var(--dark);
    text-decoration: none;
    font-weight: 700;
    font-size: 15px;
    transition: all 0.3s;
}

.btn-more:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #F0F9FF 0%, #E0F2FE 100%);
    padding: 80px 48px 40px;
    border-top: 3px solid var(--primary);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-top {
    background: white;
    border-radius: 24px;
    padding: 48px;
    margin-bottom: 48px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.06);
}

.footer-cta {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 48px;
}

.footer-cta h3 {
    font-size: 32px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.footer-cta p {
    font-size: 16px;
    color: var(--gray);
    margin-bottom: 24px;
    line-height: 1.6;
}

.footer-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 16px 40px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    font-size: 16px;
    box-shadow: 0 8px 24px rgba(45, 212, 191, 0.3);
    transition: all 0.3s;
}

.footer-cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(45, 212, 191, 0.4);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
}

.footer-brand {
    padding-right: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo-icon {
    width: 56px;
    height: 56px;
    padding: 10px 14px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer-logo-icon img {
    width: 100%;
    height: auto;
}

.footer-logo-text {
    font-size: 20px;
    font-weight: 800;
    color: var(--dark);
}

.footer-brand p {
    font-size: 15px;
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 24px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-btn {
    width: 44px;
    height: 44px;
    background: var(--light);
    border: 2px solid rgba(0,0,0,0.06);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 20px;
    transition: all 0.3s;
}

.social-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 8px 16px rgba(45, 212, 191, 0.3);
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--gray);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.footer-links a::before {
    content: '→';
    opacity: 0;
    transform: translateX(-5px);
    transition: all 0.2s;
}

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

.footer-links a:hover::before {
    opacity: 1;
    transform: translateX(0);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 2px solid rgba(45, 212, 191, 0.2);
}

.footer-bottom-left {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--gray);
    font-weight: 500;
}

.footer-bottom-left .heart {
    color: var(--secondary);
    font-size: 16px;
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    25% { transform: scale(1.2); }
    50% { transform: scale(1); }
}

.footer-bottom-right {
    display: flex;
    gap: 24px;
}

.footer-bottom-link {
    color: var(--gray);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

.footer-bottom-link:hover {
    color: var(--primary);
}

/* Responsive */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .hero h1 {
        font-size: 64px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .sponsors-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .nav,
    .hero,
    .features,
    .sponsors,
    .gallery,
    .footer {
        padding-left: 24px;
        padding-right: 24px;
    }

    .menu {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 48px;
    }

    .section-title {
        font-size: 40px;
    }

    .features-grid,
    .sponsors-grid,
    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .quick-stats {
        grid-template-columns: 1fr;
    }

    .countdown-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-brand {
        padding-right: 0;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .footer-bottom-right {
        flex-direction: column;
        gap: 12px;
    }

    .sponsors-tabs,
    .gallery-tabs {
        overflow-x: auto;
        justify-content: flex-start;
        width: 100%;
        -webkit-overflow-scrolling: touch;
    }
}