:root {
    /* Color Palette - Accessible High-Tech Light */
    --primary: #f8faff;
    --primary-light: #ffffff;

    /* Branded Colors - Contrast Enhanced */
    --brand-purple: #4a2667;
    --brand-magenta: #a03673;
    --brand-teal: #1a8a9a;
    --brand-yellow: #d4a017;

    --accent: var(--brand-teal);
    --accent-glow: rgba(26, 138, 154, 0.2);
    --secondary: var(--brand-magenta);

    --bg-dark: #f0f4f8;
    /* Light gray-blue background */
    --text-light: #1a2a45;
    /* High contrast dark text */
    --text-muted: #566a8a;
    --white: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(26, 138, 154, 0.3);

    /* Layout */
    --transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
    --radius: 16px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    background-image:
        radial-gradient(circle at 0% 0%, rgba(92, 48, 128, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 100% 100%, rgba(192, 66, 138, 0.05) 0%, transparent 50%);
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--brand-teal);
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 2.5rem;
}

/* Glassmorphism Advanced */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: 0 10px 30px -10px rgba(2, 12, 27, 0.7);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0% {
        transform: translateY(0px) rotate(0deg);
    }

    50% {
        transform: translateY(-20px) rotate(2deg);
    }

    100% {
        transform: translateY(0px) rotate(0deg);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.animate-up {
    animation: fadeInUp 1s ease-out forwards;
}

.float {
    animation: float 6s ease-in-out infinite;
}

/* Components */
.btn {
    padding: 1rem 2rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: transparent;
    border: 1px solid var(--brand-teal);
    color: var(--brand-teal);
}

.btn-primary:hover {
    background: rgba(64, 179, 194, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px -10px var(--brand-teal);
}

.btn-hero {
    background: linear-gradient(135deg, var(--brand-teal) 0%, var(--brand-purple) 100%);
    color: var(--white);
}

.btn-hero:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px -10px var(--brand-purple);
    filter: brightness(1.2);
}

/* Banner/Hero Section */
.hero-wrapper {
    position: relative;
    padding: 12rem 0 8rem;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(circle at 50% 50%, #ffffff 0%, var(--bg-dark) 100%);
}

.hero-banner-img {
    position: absolute;
    right: -10%;
    top: 50%;
    transform: translateY(-50%);
    width: 60%;
    opacity: 0.15;
    /* Subtler for light theme */
    mask-image: linear-gradient(to left, black, transparent);
    pointer-events: none;
}

.tech-tag {
    color: var(--brand-yellow);
    font-family: 'Inter', monospace;
    font-size: 0.9rem;
    letter-spacing: 2px;
    margin-bottom: 1.5rem;
    display: block;
    text-transform: uppercase;
}

h1 {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
}

h1 span {
    background: linear-gradient(to right, var(--brand-teal), var(--brand-magenta));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.card {
    padding: 2.5rem;
    transition: var(--transition);
    border: 1px solid transparent;
}

.card:hover {
    border-color: var(--brand-teal);
    background: var(--primary-light);
    transform: translateY(-10px);
}

/* New Sections Styles */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.gallery-item {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    height: 350px;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(92, 48, 128, 0.9), transparent);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 2.5rem;
    opacity: 0;
    transition: opacity 0.4s ease;
}

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

.schedule-item {
    display: flex;
    gap: 3rem;
    padding: 2.5rem;
    border-bottom: 1px solid var(--glass-border);
    transition: all 0.3s ease;
    align-items: center;
}

.schedule-item:hover {
    background: var(--white);
    transform: scale(1.01);
    box-shadow: 0 10px 20px -10px rgba(0, 0, 0, 0.1);
}

.schedule-time {
    color: var(--brand-yellow);
    font-weight: 800;
    font-size: 1.2rem;
    min-width: 150px;
    font-family: 'Inter', monospace;
}

.sponsor-logo {
    max-width: 150px;
    opacity: 0.4;
    filter: brightness(0.8) grayscale(1);
    transition: all 0.4s ease;
}

.sponsor-logo:hover {
    filter: brightness(1) grayscale(0);
    opacity: 1;
    transform: scale(1.1);
}

.list-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.8rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    margin-bottom: 1.2rem;
    text-decoration: none;
    color: var(--text-light);
    transition: var(--transition);
}

.list-item:hover {
    border-color: var(--brand-magenta);
    transform: translateX(15px);
    background: var(--white);
    box-shadow: 0 10px 20px -10px rgba(0, 0, 0, 0.1);
}

/* Scroll Progress Bar */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: linear-gradient(to right, var(--brand-purple), var(--brand-teal), var(--brand-yellow));
    z-index: 2000;
}

/* --- Responsive Design --- */

/* Tablets and Laptops (max-width: 1024px) */
@media (max-width: 1024px) {
    h1 {
        font-size: 3.5rem;
    }

    .hero-wrapper {
        padding: 10rem 0 6rem;
    }

    .container {
        padding: 0 2rem;
    }
}

/* Tablets (max-width: 768px) */
@media (max-width: 768px) {
    h1 {
        font-size: 2.8rem;
    }

    .hero-wrapper {
        padding: 8rem 0 4rem;
        text-align: center;
    }

    .hero-banner-img {
        display: none;
        /* Hide illustrative bg on small screens for clarity */
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

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

    .schedule-item {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
        padding: 1.5rem;
    }

    .schedule-time {
        min-width: auto;
    }

    /* Navigation - Premium Mobile Dropdown */
    .menu-toggle {
        display: block !important;
        position: relative;
        z-index: 1001;
    }

    .nav-wrapper {
        position: absolute;
        top: calc(100% + 1rem);
        /* Abaixo do header */
        left: 0;
        width: 100%;
        max-width: none;
        height: auto;
        max-height: 0;
        /* Começa fechado */
        background: var(--white);
        flex-direction: column !important;
        justify-content: flex-start !important;
        align-items: center !important;
        gap: 2rem !important;
        padding: 0 2rem;
        transition: max-height 0.5s cubic-bezier(0.77, 0, 0.175, 1), padding 0.5s ease;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
        z-index: 1000;
        overflow: hidden;
        border-radius: 0 0 var(--radius) var(--radius);
        border: 1px solid var(--glass-border);
        border-top: none;
    }

    .nav-wrapper.active {
        max-height: 500px;
        /* Expande ao abrir */
        padding: 3rem 2rem;
    }

    .nav-wrapper ul {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem !important;
        width: 100%;
    }

    .nav-wrapper ul li a {
        font-size: 1.1rem !important;
        width: 100%;
        text-align: center;
        display: block;
        padding: 0.5rem 0;
    }

    .nav-wrapper .actions {
        flex-direction: column;
        width: 100%;
        gap: 1rem !important;
        padding-top: 1rem;
        border-top: 1px solid var(--glass-border);
    }

    header {
        position: fixed !important;
        margin: 1rem !important;
        width: calc(100% - 2rem) !important;
        left: 0 !important;
        right: 0 !important;
        background: var(--glass-bg);
        border-radius: var(--radius);
    }

    main {
        padding-top: 8rem !important;
    }

    footer .container {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
}

/* Mobile (max-width: 480px) */
@media (max-width: 480px) {
    h1 {
        font-size: 2.2rem;
    }

    .tech-tag {
        font-size: 0.8rem;
    }

    .container {
        padding: 0 1.5rem;
    }

    .glass {
        padding: 1.5rem !important;
    }

    .list-item {
        padding: 1.2rem;
        font-size: 0.9rem;
    }

    .list-item:hover {
        transform: translateX(5px);
    }
}