/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* IEEE Event colors with #002855 primary */
    --primary-dark: #002855;
    --secondary-dark: #003a75;
    --accent-blue: #3b82f6;
    --accent-cyan: #06b6d4;
    --accent-purple: #8b5cf6;
    --accent-pink: #ec4899;
    --accent-gold: #f59e0b;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Breakpoints */
    --bp-sm: 640px;
    --bp-md: 768px;
    --bp-lg: 1024px;
    --bp-xl: 1280px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Border Radius */
    --radius-sm: 0.125rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-3xl: 1.5rem;
    /* Carousel gap (desktop) */
    --carousel-gap: 24px;
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    background: var(--primary-dark);
}

/* Prevent background scroll when mobile menu is open */
body.no-scroll {
    overflow: hidden;
    height: 100vh;
}

/* Prevent horizontal overflow by default */
img {
    max-width: 100%;
    height: auto;
}

/* Global mobile overflow protection */
@media (max-width: 768px) {
    * {
        overflow-x: hidden;
    }
    
    .container {
        padding: 0 var(--space-4);
        max-width: 100%;
    }
    
    /* Optimize typography for mobile */
    .section__title {
        font-size: var(--font-size-3xl);
        line-height: 1.2;
        margin-bottom: var(--space-4);
    }
    
    .section__subtitle {
        font-size: var(--font-size-lg);
        margin-bottom: var(--space-6);
    }
    
    /* Improve button touch targets */
    .btn {
        min-height: 44px;
        padding: var(--space-3) var(--space-6);
        font-size: var(--font-size-base);
    }
    
    /* Optimize hero section for mobile */
    .hero__title {
        text-align: center;
        margin-bottom: var(--space-8);
    }
    
    .hero__main-title {
        font-size: var(--font-size-4xl);
        display: block;
        margin-bottom: var(--space-2);
    }
    
    .hero__date, .hero__location {
        font-size: var(--font-size-xl);
        display: block;
        margin-bottom: var(--space-2);
    }
    
    /* Improve countdown display */
    .countdown {
        gap: var(--space-3);
        margin: var(--space-8) 0;
    }
    
    .countdown__item {
        min-width: 70px;
    }
    
    .countdown__number {
        font-size: var(--font-size-3xl);
    }
}
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* Header - Dark minimalist */
.header {
    /* Consistent, safe-area-aware fixed header */
    --header-h: 70px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 2500;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    padding-top: env(safe-area-inset-top);
}

.nav__container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-h);
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}



.nav__menu {
    flex: 1;
    display: flex;
    justify-content: center;
}

.logo {
    height: 40px;
    width: auto;
}

.nav__list {
    display: flex;
    list-style: none;
    gap: var(--space-10);
    align-items: center;
}

.nav__link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--font-size-base);
    transition: color 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav__link:hover {
    color: var(--accent-cyan);
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.nav__cta--desktop {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
}

.nav__cta--mobile {
    display: none;
}

.nav__cta {
    background: var(--accent-blue);
    color: var(--white) !important;
    padding: var(--space-3) var(--space-6);
    border-radius: 0;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 1px solid var(--accent-blue);
}

.nav__cta:hover {
    background: transparent;
    color: var(--accent-blue) !important;
    transform: translateY(-1px);
}

.nav__toggle {
    display: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--text-primary);
    width: 44px;
    height: 44px;
    place-items: center;
    background: transparent;
    border: none;
}

/* Adjust spacing for tablets */
@media (max-width: 1024px) {
    .nav__list {
        gap: var(--space-6);
    }
    
    .nav__link {
        font-size: var(--font-size-sm);
    }
}

@media (max-width: 768px) {
    .header { 
        --header-h: 60px;
        background: rgba(10, 14, 26, 0.98);
        backdrop-filter: blur(20px);
    }
    
    .nav__container { 
        padding: 0 var(--space-3);
        min-height: var(--header-h);
        justify-content: center;
    }

    /* Hide logo completely on mobile */
    .nav__logo {
        display: none;
    }
    
    /* Show mobile menu as horizontal flex */
    .nav__menu {
        display: flex !important;
        flex: 1;
        justify-content: center;
    }
    
    .nav__list {
        display: flex !important;
        align-items: center;
        gap: var(--space-4);
        margin: 0;
        padding: 0;
    }
    
    .nav__item {
        margin: 0;
    }
    
    .nav__link {
        font-size: var(--font-size-sm);
        font-weight: 500;
        color: var(--text-primary) !important;
        padding: var(--space-2) var(--space-1);
        white-space: nowrap;
    }
    
    .nav__link:hover {
        color: var(--accent-cyan) !important;
    }
    
    .nav__link--active {
        color: var(--accent-blue) !important;
    }
    
    /* Hide hamburger menu completely */
    .nav__toggle {
        display: none !important;
    }
    
    .nav__actions {
        gap: var(--space-2);
    }
    
    .nav__cta--desktop {
        padding: var(--space-2) var(--space-3);
        font-size: var(--font-size-xs);
        white-space: nowrap;
    }
    
    /* Hide mobile CTA since we keep desktop one */
    .nav__cta--mobile {
        display: none !important;
    }
    

}

/* Extra small mobile devices */
@media (max-width: 480px) {
    .header {
        --header-h: 55px;
    }
    
    .nav__container {
        padding: 0 var(--space-2);
    }
    
    .nav__list {
        gap: var(--space-2);
    }
    
    .nav__link {
        font-size: 12px;
        padding: var(--space-1);
    }
    
    .nav__cta--desktop {
        padding: 8px 12px;
        font-size: 11px;
    }

    .hero__grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 320px;
    }
}

/* Very small devices - Optimize for space */
@media (max-width: 360px) {
    .nav__container {
        padding: 0 var(--space-1);
    }
    
    .nav__list {
        gap: var(--space-1);
    }
    
    .nav__link {
        font-size: 11px;
        padding: 4px;
    }
    
    .nav__cta--desktop {
        font-size: 10px;
        padding: 6px 8px;
    }
}

/* Hero Section - MIT Media Lab Style with grain effect */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--primary-dark);
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
    opacity: 1;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle, rgba(255, 255, 255, 0.8) 0.5px, transparent 0.5px),
        radial-gradient(circle, rgba(255, 255, 255, 0.4) 0.5px, transparent 0.5px),
        radial-gradient(circle, rgba(255, 255, 255, 0.2) 1px, transparent 1px);
    background-size: 
        3px 3px, 
        7px 7px, 
        13px 13px;
    background-position: 
        0 0, 
        2px 2px, 
        5px 5px;
    opacity: 0.6;
    animation: grain 8s steps(10) infinite;
}

@keyframes grain {
    0%, 100% { transform: translate(0, 0); }
    10% { transform: translate(-5%, -5%); }
    20% { transform: translate(-10%, 5%); }
    30% { transform: translate(5%, -10%); }
    40% { transform: translate(-5%, 15%); }
    50% { transform: translate(-10%, 5%); }
    60% { transform: translate(15%, 0); }
    70% { transform: translate(0, 10%); }
    80% { transform: translate(-15%, 0); }
    90% { transform: translate(10%, 5%); }
}

.hero__container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--space-24) var(--space-6);
}

.hero__content {
    animation: fadeInUp 1s ease;
}

.hero__subtitle {
    display: block;
    font-size: var(--font-size-6xl);
    font-weight: 900;
    margin-bottom: var(--space-2);
    color: var(--accent-gold);
    text-transform: uppercase;
    letter-spacing: -0.02em;
    text-shadow: 2px 2px 0px rgba(0, 0, 0, 0.3);
    font-family: 'Inter', sans-serif;
}

.hero__main-title {
    display: block;
    font-size: clamp(3rem, 7vw, 8.5rem);
    font-weight: 900;
    line-height: 0.75;
    margin-bottom: var(--space-4);
    color: var(--text-primary);
    letter-spacing: -0.05em;
    text-transform: uppercase;
    text-shadow: 3px 3px 0px rgba(0, 0, 0, 0.4);
    font-family: 'Inter', sans-serif;
    white-space: nowrap;
}

.hero__date {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--text-primary);
    font-style: normal;
    letter-spacing: 0.05em;
}

.hero__location {
    display: block;
    font-size: var(--font-size-lg);
    font-weight: 500;
    margin-bottom: var(--space-12);
    color: var(--text-secondary);
    text-transform: none;
    letter-spacing: 0.02em;
}

/* Countdown - MIT Dark Style */
.countdown {
    display: flex;
    gap: var(--space-8);
    margin: var(--space-12) 0;
    animation: fadeIn 1.5s ease;
}

.countdown__item {
    text-align: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-8);
    border-radius: 0;
    min-width: 120px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    position: relative;
}

.countdown__item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

.countdown__item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
    border-color: rgba(6, 182, 212, 0.5);
}

.countdown__number {
    display: block;
    font-size: var(--font-size-5xl);
    font-weight: 900;
    color: var(--text-primary);
    transition: color 0.3s ease;
    line-height: 1;
    font-family: 'JetBrains Mono', monospace;
}

.countdown__label {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: var(--space-3);
    transition: color 0.3s ease;
}

.countdown__item:hover .countdown__label {
    color: var(--accent-cyan);
}

.hero__cta {
    margin-top: var(--space-8);
}

/* Hero Visual Grid - MIT Style with proper image treatment */
.hero__visual {
    position: relative;
    animation: fadeInRight 1s ease;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.hero__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(100px, 1fr));
    gap: var(--space-2);
    width: 100%;
    max-width: 600px;
    margin-left: auto;
    opacity: 1;
}

.grid__item {
    aspect-ratio: 1 / 1;
    border-radius: 0;
    overflow: hidden;
    position: relative;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.grid__item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(59, 130, 246, 0.1), rgba(6, 182, 212, 0.1));
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 2;
}

.grid__item:hover::before {
    opacity: 1;
}

.grid__item:hover {
    transform: translateY(-10px) scale(1.05);
    border-color: var(--accent-cyan);
}

.grid__item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
    filter: grayscale(100%) brightness(0.9);
    animation: heroImageReveal 12s ease-in-out infinite;
}

.grid__item:hover img {
    filter: grayscale(0%) brightness(1);
    transform: scale(1.06);
}

@media (max-width: 768px) {
    /* Prevent text dragging/selection on mobile */
    * {
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
        -webkit-touch-callout: none;
        -webkit-tap-highlight-color: transparent;
    }
    
    /* Allow selection only for input fields and content areas where needed */
    input, textarea, [contenteditable] {
        -webkit-user-select: text;
        -moz-user-select: text;
        -ms-user-select: text;
        user-select: text;
    }
    
    .hero {
        padding: var(--space-20) 0 var(--space-16);
        min-height: calc(100vh - 64px);
    }
    
    .hero__container {
        grid-template-columns: 1fr;
        gap: var(--space-8);
        padding: 0 var(--space-4);
        text-align: center;
        max-width: 100%;
    }
    
    .hero__content {
        order: 1;
        /* push title slightly lower on mobile */
        margin-top: var(--space-10);
    }
    
    .hero__title {
        margin-bottom: var(--space-6);
    }
    
    .hero__subtitle {
        font-size: var(--font-size-2xl);
    }
    
    .hero__main-title {
        font-size: clamp(2.5rem, 10vw, 4rem);
        white-space: normal;
        line-height: 0.9;
        word-break: break-word;
        max-width: 100%;
        margin-bottom: var(--space-4);
        letter-spacing: -0.03em;
    }
    
    .hero__date {
        font-size: var(--font-size-xl);
        margin-bottom: var(--space-3);
    }
    
    .hero__location {
        font-size: var(--font-size-lg);
        margin-bottom: var(--space-8);
        color: var(--text-secondary);
    }
    
    .countdown {
        justify-content: center;
        gap: var(--space-2);
        margin: var(--space-8) 0;
        flex-wrap: wrap;
    }
    
    .countdown__item {
        min-width: 70px;
        padding: var(--space-4);
        flex: 1;
        max-width: 80px;
    }
    
    .countdown__number {
        font-size: var(--font-size-2xl);
        font-weight: 700;
    }
    
    .countdown__label {
        font-size: var(--font-size-xs);
        text-transform: uppercase;
    }
    
    .hero__cta {
        margin-top: var(--space-10);
        display: flex;
        justify-content: center;
    }
    
    .hero__cta .btn {
        width: 100%;
        max-width: 280px;
        padding: var(--space-4) var(--space-6);
        font-size: var(--font-size-lg);
        font-weight: 600;
        justify-content: center;
        gap: var(--space-3);
        display: flex;
        align-items: center;
    }
    
    .hero__visual {
        order: 2;
        margin-top: var(--space-8);
    }
    
    .hero__grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-1);
        width: 100%;
        max-width: 360px;
        margin: 0 auto;
    }
}

/* Buttons - MIT Dark Style */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-10);
    border: 1px solid transparent;
    border-radius: 0;
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: center;
    line-height: 1;
    text-transform: uppercase;
    letter-spacing: 1px;
    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;
}

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

.btn--primary {
    background: var(--accent-blue);
    color: var(--white);
    border-color: var(--accent-blue);
}

.btn--primary:hover {
    background: var(--accent-cyan);
    border-color: var(--accent-cyan);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(59, 130, 246, 0.4);
}

.btn--secondary {
    background: transparent;
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn--secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

.btn--block {
    width: 100%;
    justify-content: center;
    padding-left: var(--space-6);
    padding-right: var(--space-6);
}

.btn--ghost {
    background: transparent;
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn--ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

/* Section Titles - Matching event visual style */
.section__title {
    font-size: clamp(2.25rem, 4vw, 3.5rem);
    font-weight: 900;
    text-align: center;
    margin-bottom: var(--space-4);
    color: var(--text-primary);
    letter-spacing: -0.04em;
    line-height: 0.8;
    text-transform: uppercase;
    text-shadow: 2px 2px 0px rgba(0, 0, 0, 0.3);
    font-family: 'Inter', sans-serif;
}

.section__subtitle {
    font-size: var(--font-size-lg);
    text-align: center;
    color: var(--text-muted);
    margin-bottom: var(--space-16);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 300;
    line-height: 1.7;
}

.section__cta {
    text-align: center;
    margin-top: var(--space-16);
}

/* Minicursos Section - With grain effect */
.minicursos {
    padding: var(--space-24) 0;
    background: var(--secondary-dark);
    position: relative;
}

.minicursos::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle, rgba(255, 255, 255, 0.6) 0.5px, transparent 0.5px),
        radial-gradient(circle, rgba(255, 255, 255, 0.3) 0.5px, transparent 0.5px);
    background-size: 
        4px 4px, 
        8px 8px;
    background-position: 
        0 0, 
        3px 3px;
    opacity: 0.15;
    animation: grain 6s steps(8) infinite;
}

.carousel {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
}

.carousel__container {
    display: flex;
    transition: transform 0.5s ease;
    gap: var(--carousel-gap);
    align-items: stretch;
    overflow: visible;
}

.carousel__slide {
    /* 3 por vez no desktop, já considerando 2 gaps entre 3 itens */
    min-width: calc((100% - 2 * var(--carousel-gap)) / 3);
    flex-shrink: 0;
    display: flex;
}

/* Força o card a ocupar 100% da altura do slide */
.carousel__slide .course__card {
    flex: 1;
}

.course__card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    height: 100%;
    /* Ensure consistent card height across slides on desktop/tablet */
    min-height: 440px;
    backdrop-filter: blur(10px);
    position: relative;
    display: flex;
    flex-direction: column;
}

.course__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan), var(--accent-purple));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

.course__card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-cyan);
    background: rgba(255, 255, 255, 0.05);
}

.course__image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    filter: grayscale(100%) contrast(1.2) brightness(0.8);
    transition: all 0.4s ease;
}

.course__card:hover .course__image {
    filter: grayscale(20%) contrast(1.1) brightness(1);
    transform: scale(1.05);
}

.course__content {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    flex: 1;
}

.course__title {
    font-size: var(--font-size-lg);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    font-family: 'Inter', sans-serif;
    text-shadow: 1px 1px 0px rgba(0, 0, 0, 0.3);
}

.course__description {
    color: var(--text-muted);
    margin-bottom: var(--space-6);
    line-height: 1.6;
    font-weight: 300;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.carousel__controls {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    margin-top: var(--space-8);
}

/* Linha de metadados de data/horário nos cards */
.course__meta {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    letter-spacing: 0.3px;
}

/* Empurrar o botão para a base do card */
.course__content .btn {
    margin-top: auto;
}

.carousel__btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: var(--font-size-lg);
    backdrop-filter: blur(10px);
}

.carousel__btn:hover {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    transform: scale(1.1);
}

.carousel__dots {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    margin-top: var(--space-8);
}

.carousel__dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
}

.carousel__dot.active {
    background: var(--accent-cyan);
    transform: scale(1.3);
}

@media (max-width: 1024px) {
    .carousel__slide {
        /* 2 por vez em telas médias, 1 gap */
        min-width: calc((100% - var(--carousel-gap)) / 2);
    }
}

@media (max-width: 768px) {
    /* Fix carousel mobile overflow */
    .minicursos { overflow: hidden; }
    .carousel { overflow: visible; margin: 0; padding: 0; }
    
    .carousel__container {
        gap: var(--space-4);
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    .carousel__container::-webkit-scrollbar { display: none; }

    .carousel__slide {
        min-width: calc(100vw - var(--space-8));
        flex-shrink: 0;
        scroll-snap-align: start;
        margin: 0;
        display: flex;
    }
    /* Ensure course cards maintain proper sizing */
    .course__card { min-height: 400px; width: 100%; }
    
    /* Make controls more touch-friendly */
    .carousel__controls { margin-top: var(--space-6); gap: var(--space-6); }
    .carousel__btn {
        width: 50px; height: 50px; font-size: var(--font-size-xl);
        background: rgba(255, 255, 255, 0.15);
        border: 2px solid rgba(255, 255, 255, 0.3);
    }
    .section__title { font-size: var(--font-size-3xl); }
}

/* Sobre Section - With grain effect */
.sobre {
    padding: var(--space-24) 0;
    background: var(--primary-dark);
    position: relative;
}

.sobre::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 30%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(236, 72, 153, 0.08) 0%, transparent 50%);
}

.sobre::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle, rgba(255, 255, 255, 0.5) 0.5px, transparent 0.5px),
        radial-gradient(circle, rgba(255, 255, 255, 0.3) 1px, transparent 1px);
    background-size: 
        5px 5px, 
        12px 12px;
    background-position: 
        1px 1px, 
        6px 6px;
    opacity: 0.2;
    animation: grain 10s steps(12) infinite reverse;
    z-index: 1;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-blue), var(--accent-cyan), var(--accent-purple));
    transform: translateX(-50%);
}

.timeline__item {
    position: relative;
    margin-bottom: var(--space-16);
    display: flex;
    align-items: center;
}

.timeline__item:nth-child(odd) {
    flex-direction: row;
}

.timeline__item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline__date {
    background: var(--accent-blue);
    color: var(--white);
    padding: var(--space-4) var(--space-8);
    border-radius: 0;
    font-weight: 700;
    font-size: var(--font-size-sm);
    text-align: center;
    min-width: 140px;
    position: relative;
    z-index: 2;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 1px solid var(--accent-cyan);
}

.timeline__content {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0;
    padding: var(--space-8);
    margin: 0 var(--space-10);
    flex: 1;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    position: relative;
}

.timeline__content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

.timeline__content:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-cyan);
}

.timeline__content h3 {
    color: var(--text-primary);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.timeline__content p {
    color: var(--text-muted);
    line-height: 1.7;
    font-weight: 300;
}

@media (max-width: 768px) {
    .timeline::before {
        left: 20px;
    }
    
    .timeline__item {
        flex-direction: row !important;
        padding-left: var(--space-12);
    }
    
    .timeline__date {
        position: absolute;
        left: -60px;
        min-width: 100px;
        font-size: var(--font-size-xs);
        padding: var(--space-2) var(--space-4);
    }
    
    .timeline__content {
        margin: 0;
    }
}

/* Patrocinadores Section - With grain effect */
.patrocinadores {
    padding: var(--space-24) 0;
    background: var(--secondary-dark);
    position: relative;
}

/* Confirmation Page Styles */
.confirmation {
    padding: 8rem 0;
    text-align: center;
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.confirmation__card {
    background: rgba(255,255,255,0.03);
    padding: 3rem;
    border-radius: 12px;
    max-width: 600px;
    margin: 0 auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255,255,255,0.12);
}

.confirmation__image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.confirmation__title {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.confirmation__message {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

.btn--whatsapp {
    background-color: #25D366;
    color: white !important;
}

.btn--whatsapp:hover {
    background-color: #128C7E;
}

.confirmation__footer {
    margin-top: 2rem;
}

.confirmation__footer a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s;
}

.confirmation__footer a:hover {
    color: var(--accent-cyan);
}


/* Inscrições - mantém a linguagem visual */
.hero--compact { min-height: 70vh; }

.inscricoes {
    padding: var(--space-24) 0;
    background: var(--primary-dark);
    position: relative;
}

.form {
    max-width: 980px;
    margin: 0 auto;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.12);
    backdrop-filter: blur(10px);
    padding: var(--space-10);
}

.form__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.form select {
    color: var(--text-primary);
}

.form select option {
    background: var(--primary-dark);
    color: var(--text-primary);
}

.form__group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}
.form__group--full { grid-column: 1 / -1; }
.form__group--checkbox { align-items: flex-start; }

.form__note {
    margin-top: var(--space-4);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.form__note + .form__note {
    margin-top: var(--space-2);
}

.form__note--alert {
    color: var(--accent-gold);
    font-weight: 600;
}

.checkbox {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.checkbox input[type="checkbox"] {
    margin-top: 3px;
}

.checkbox a {
    color: var(--accent-cyan);
    text-decoration: underline;
}

.form label, .form legend {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: .5px;
}

.form input[type="text"],
.form input[type="email"],
.form input[type="tel"],
.form input[type="number"],
.form select,
.form textarea {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.18);
    color: var(--text-primary);
    padding: var(--space-4) var(--space-5);
    font-size: var(--font-size-base);
}

.form input::placeholder, .form textarea::placeholder { color: var(--text-muted); }

.form input:focus, .form select:focus, .form textarea:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 2px rgba(6,182,212,0.25);
}

.form__fieldset { border: 1px solid rgba(255,255,255,0.15); padding: var(--space-6); }
.checks { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3); margin-top: var(--space-3); }
.check { display: flex; align-items: center; gap: var(--space-2); color: var(--text-secondary); }

.indicacao { margin-top: var(--space-4); }
.hidden { display: none; }

.form__actions { display: flex; align-items: center; gap: var(--space-4); margin-top: var(--space-8); }
.form__status { color: var(--text-secondary); font-size: var(--font-size-sm); }

@media (max-width: 768px) {
  .hero--compact { min-height: 60vh; }
  .form { padding: var(--space-6); }
  .form__grid { grid-template-columns: 1fr; }
  .checks { grid-template-columns: 1fr; }
    .form select,
    .form input,
    .form textarea { font-size: 16px; }
}

/* Notices */
.notice {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(245, 158, 11, 0.1);
  color: var(--text-primary);
  margin-bottom: var(--space-6);
}
.notice--warning { border-color: rgba(245, 158, 11, 0.4); }
.notice--info {
    border-color: rgba(59, 130, 246, 0.5);
    background: rgba(59, 130, 246, 0.12);
}
.notice i { color: var(--accent-gold); }
.notice--info i { color: var(--accent-cyan); }

@media (max-width: 768px) {
    .patrocinadores {
        padding: var(--space-16) 0;
    }
    .sponsors__grid {
        gap: var(--space-6);
    }
}

.patrocinadores::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle, rgba(255, 255, 255, 0.4) 0.5px, transparent 0.5px),
        radial-gradient(circle, rgba(255, 255, 255, 0.6) 0.5px, transparent 0.5px);
    background-size: 
        6px 6px,
        3px 3px;
    background-position: 
        0 0,
        2px 2px;
    opacity: 0.25;
    animation: grain 12s steps(15) infinite;
}

.sponsors__title {
    text-align: center;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-10);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.sponsor__placeholder {
    background: rgba(255, 255, 255, 0.02);
    border: 1px dashed rgba(255, 255, 255, 0.2);
    border-radius: 0;
    padding: var(--space-12);
    text-align: center;
    color: var(--text-muted);
    font-weight: 300;
    min-height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.sponsors__tier {
    margin-bottom: var(--space-16);
}

/* Gold tier: slightly reduced vertical spacing to balance larger logo */
.sponsors__tier--gold {
    margin-bottom: var(--space-12);
}

.sponsors__grid {
    display: grid;
    gap: var(--space-10);
    justify-items: center;
    align-items: center;
}

.sponsors__grid--gold {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.sponsors__grid--silver {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.sponsors__grid--bronze {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
}

/* Sponsor logo and item layout */
.sponsor__item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
}

.sponsor__logo {
    max-height: 150px; /* default desktop */
    width: auto;
    object-fit: contain;
}

/* Apoio: fundo branco para melhor contraste das logos */
/* Apoio: bloco inteiro com fundo branco (abaixo do título) */
.sponsors__panel--apoio {
    background: #fff;
    border: 1px solid rgba(0,0,0,0.06);
    padding: var(--space-10);
}

/* Tamanhos específicos por logo (desktop base) */
.sponsor__logo--grande { max-height: 180px; }
.sponsor__logo--medio  { max-height: 140px; }
.sponsor__logo--pequeno{ max-height: 110px; }

/* Gold-specific prominence: larger logo and tighter tier spacing on desktop */
.sponsors__grid--gold .sponsor__item { padding: var(--space-4); }
.sponsors__grid--gold .sponsor__logo { max-height: 180px; }

@media (max-width: 1024px) {
    .sponsor__logo { max-height: 120px; }
    .sponsor__logo--grande { max-height: 150px; }
    .sponsor__logo--medio  { max-height: 120px; }
    .sponsor__logo--pequeno{ max-height: 100px; }
    /* keep gold slightly prominent on tablets if desired; keep equal for now */
    .sponsors__grid--gold .sponsor__logo { max-height: 120px; }
}

@media (max-width: 768px) {
    .sponsor__logo { max-height: 90px; }
    .sponsor__logo--grande { max-height: 110px; }
    .sponsor__logo--medio  { max-height: 90px; }
    .sponsor__logo--pequeno{ max-height: 70px; }
    .sponsors__grid--gold .sponsor__logo { max-height: 90px; }
    /* reduce item padding on small screens to avoid overflow */
    .sponsor__item { padding: var(--space-4); }
}

/* Footer - MIT Dark Style */
.footer {
    background: var(--primary-dark);
    color: var(--text-primary);
    padding: var(--space-20) 0 var(--space-10);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan), var(--accent-purple));
}

.footer__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-10);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

.footer__logo-img {
    height: 60px;
    width: auto;
    filter: brightness(0) invert(1);
}

.footer__info h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer__info p {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    font-weight: 300;
}

.footer__social {
    display: flex;
    gap: var(--space-4);
}

.social__link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 0;
    text-decoration: none;
    font-size: var(--font-size-lg);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.social__link:hover {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    transform: translateY(-3px);
    color: var(--white);
}

.footer__bottom {
    text-align: center;
    padding-top: var(--space-10);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    font-weight: 300;
}

@media (max-width: 768px) {
    .footer__content {
        flex-direction: column;
        gap: var(--space-6);
        text-align: center;
    }
}

/* Footer mobile optimizations */
@media (max-width: 768px) {
    .footer {
        padding: var(--space-12) 0 var(--space-8);
        padding-bottom: calc(var(--space-8) + env(safe-area-inset-bottom));
    }
    .footer__logo-img { height: 48px; }
    .footer__info h3 { font-size: var(--font-size-lg); }
    .footer__social { gap: var(--space-3); }
    .social__link { width: 44px; height: 44px; }
    .footer__bottom { font-size: var(--font-size-xs); padding-top: var(--space-6); }
}

    /* Programação - Mosaic Tabs inspired by MIT */
    .programacao {
        padding: var(--space-24) 0;
        background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0) 20%);
    }

    .tabs {
        display: flex;
        gap: var(--space-4);
        margin: var(--space-6) 0 var(--space-8);
        flex-wrap: wrap;
    }

    .tab {
        background: rgba(255,255,255,0.06);
        color: var(--text-primary);
        border: 1px solid rgba(255,255,255,0.12);
        padding: var(--space-3) var(--space-5);
        cursor: pointer;
        transition: all 0.25s ease;
        font-weight: 600;
    }

    .tab:hover { background: rgba(255,255,255,0.1); }
    .tab.active { background: var(--accent-blue); border-color: var(--accent-blue); }

    .day-panel { display: none; }
    .day-panel.active { display: block; }

    /* Schedule cards */
    .schedule {
        display: grid;
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .slot {
        display: grid;
        grid-template-columns: 240px 1fr;
        gap: var(--space-6);
        padding: var(--space-6);
        background: rgba(255,255,255,0.04);
        border: 1px solid rgba(255,255,255,0.12);
    }

    .slot + .slot { border-top: none; }

    .slot__media img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        filter: grayscale(100%);
        transition: filter 0.3s ease, transform 0.3s ease;
    }

    .slot:hover .slot__media img {
        filter: grayscale(0%);
        transform: scale(1.02);
    }
    
    .slot__time {
        display: inline-block;
        font-weight: 700;
        color: var(--accent-blue);
        margin-bottom: var(--space-2);
    }

    .slot__title {
        font-size: var(--font-size-2xl);
        line-height: 1.2;
        margin-bottom: var(--space-2);
    }

    .slot__desc {
        color: var(--text-secondary);
    }

    @media (max-width: 768px) {
        .tabs {
            gap: var(--space-2);
            margin: var(--space-4) 0 var(--space-6);
        }
        
        .tab {
            flex: 1;
            min-width: 0;
            text-align: center;
            padding: var(--space-3);
            font-size: var(--font-size-sm);
        }
        
        .slot { 
            grid-template-columns: 1fr; 
            padding: var(--space-4); 
            gap: var(--space-4);
        }
        
        .slot__media { 
            height: 140px; 
            order: -1;
        }
        
        .slot__title { 
            font-size: var(--font-size-xl); 
            line-height: 1.3;
        }
        
        .slot__desc {
            font-size: var(--font-size-sm);
            line-height: 1.5;
        }
        
        .schedule {
            gap: var(--space-4);
        }
    }

    @media (max-width: 480px) {
        .slot__media {
            height: 120px;
        }

        .slot__time {
            font-size: var(--font-size-sm);
        }

        .slot__title {
            font-size: var(--font-size-lg);
        }

        .slot__desc {
            font-size: var(--font-size-sm);
        }
    }

    .mosaic {
        display: grid;
        grid-template-columns: repeat(6, 1fr);
        grid-auto-rows: 120px;
        gap: var(--space-4);
    }

    .mosaic__item {
        position: relative;
        overflow: hidden;
        border: 1px solid rgba(255,255,255,0.12);
        background: rgba(255,255,255,0.04);
    }

    .mosaic__item--wide { grid-column: span 3; grid-row: span 2; }
    .mosaic__item--tall { grid-column: span 3; grid-row: span 3; }

    .mosaic__item img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
        filter: grayscale(100%) contrast(1.05) brightness(0.95);
        transition: filter 0.4s ease, transform 0.4s ease;
    }

    .mosaic__item:hover img {
        filter: grayscale(0%) brightness(1);
        transform: scale(1.03);
    }

    .mosaic__caption {
        position: absolute;
        left: 0; right: 0; bottom: 0;
        padding: var(--space-4);
        background: linear-gradient(180deg, transparent, rgba(0,0,0,0.55));
    }

    .mosaic__caption h3 {
        font-size: var(--font-size-lg);
        line-height: 1.2;
    }

    .mosaic__caption span {
        display: inline-block;
        margin-top: var(--space-2);
        color: var(--text-secondary);
        font-weight: 600;
    }

    @media (max-width: 1024px) {
        .mosaic { grid-template-columns: repeat(4, 1fr); grid-auto-rows: 110px; }
        .mosaic__item--wide { grid-column: span 4; }
        .mosaic__item--tall { grid-column: span 4; grid-row: span 4; }
    }

    @media (max-width: 640px) {
        .mosaic { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 100px; }
        .mosaic__item--wide, .mosaic__item--tall { grid-column: span 2; grid-row: span 2; }
    }

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

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Hero image grayscale→color subtle cycle */
@keyframes heroImageReveal {
    0%   { filter: grayscale(100%) brightness(0.9); }
    15%  { filter: grayscale(0%)   brightness(1); }
    35%  { filter: grayscale(0%)   brightness(1); }
    50%  { filter: grayscale(100%) brightness(0.9); }
    100% { filter: grayscale(100%) brightness(0.9); }
}

/* Staggered delays for the 9 tiles */
.hero__grid .grid__item:nth-child(1) img { animation-delay: 0s; }
.hero__grid .grid__item:nth-child(2) img { animation-delay: 0.6s; }
.hero__grid .grid__item:nth-child(3) img { animation-delay: 1.2s; }
.hero__grid .grid__item:nth-child(4) img { animation-delay: 1.8s; }
.hero__grid .grid__item:nth-child(5) img { animation-delay: 2.4s; }
.hero__grid .grid__item:nth-child(6) img { animation-delay: 3.0s; }
.hero__grid .grid__item:nth-child(7) img { animation-delay: 3.6s; }
.hero__grid .grid__item:nth-child(8) img { animation-delay: 4.2s; }
.hero__grid .grid__item:nth-child(9) img { animation-delay: 4.8s; }

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus styles for accessibility */
.btn:focus,
.nav__link:focus,
.carousel__btn:focus {
    outline: 2px solid var(--accent-gold);
    outline-offset: 2px;
}

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Utility classes */
.text-center {
    text-align: center;
}

.hidden {
    display: none;
}

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

/* Hackathon specific styles */
.hackathon {
    padding: var(--space-24) 0;
    background: var(--primary-dark);
    position: relative;
}

.hackathon__title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: -0.02em;
    text-shadow: 2px 2px 0px rgba(0, 0, 0, 0.3);
    font-family: 'Inter', sans-serif;
}

.hackathon__subtitle {
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    text-align: center;
}

.hackathon__cta {
    display: flex;
    justify-content: center;
    margin-top: var(--space-8);
}

.hackathon__form {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 8px;
    padding: var(--space-10);
    max-width: 800px;
    margin: 0 auto;
    backdrop-filter: blur(10px);
}

.hackathon__form h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-6);
    text-align: center;
}

.hackathon__form .form__group {
    margin-bottom: var(--space-4);
}

.hackathon__form label {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: var(--space-2);
    display: block;
}

.hackathon__form input,
.hackathon__form select,
.hackathon__form textarea {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: var(--text-primary);
    padding: var(--space-4) var(--space-5);
    font-size: var(--font-size-base);
    border-radius: 4px;
}

.hackathon__form input::placeholder,
.hackathon__form textarea::placeholder {
    color: var(--text-muted);
}

.hackathon__form button {
    margin-top: var(--space-4);
    padding: var(--space-4) var(--space-6);
    background: var(--accent-blue);
    color: var(--white);
    border: none;
    border-radius: 4px;
    font-size: var(--font-size-lg);
    cursor: pointer;
    transition: background 0.3s ease;
}

.hackathon__form button:hover {
    background: var(--accent-cyan);
}

.hackathon__teams {
    margin-top: var(--space-12);
}

.hackathon__team {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: var(--space-6);
    margin-bottom: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.hackathon__team h4 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.hackathon__team p {
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

.hackathon__team .btn {
    align-self: flex-start;
}

@media (max-width: 768px) {
    .hackathon__title {
        font-size: var(--font-size-3xl);
    }
    
    .hackathon__subtitle {
        font-size: var(--font-size-lg);
    }
    
    .hackathon__form {
        padding: var(--space-6);
    }
    
    .hackathon__form h3 {
        font-size: var(--font-size-xl);
    }
    
    .hackathon__team {
        padding: var(--space-4);
    }
}

/* Ajuste específico para o hero do hackathon: reduzir título para aumentar área ocupada pelo hero de forma proporcional */
#hackathon-hero .hero__main-title {
  font-size: clamp(1.75rem, 5.2vw, 4.25rem);
  line-height: 0.95;
    white-space: normal; /* allow wrapping on hackathon to avoid truncation */
    overflow: visible;
}
#hackathon-hero .hero__date { font-size: clamp(1rem, 2vw, 1.5rem); }
#hackathon-hero .hero__location { font-size: clamp(0.95rem, 1.6vw, 1.15rem); }

@media (max-width: 768px) {
  #hackathon-hero .hero__main-title { font-size: clamp(1.75rem, 9vw, 2.75rem); }
}

/* Replicar proporção do hero de inscrições no hackathon */
#hackathon-hero.hero--compact .hero__container {
  padding: var(--space-24) var(--space-6);
  gap: var(--space-16);
}
@media (max-width: 768px) {
  #hackathon-hero.hero--compact .hero__container {
    padding: var(--space-16) var(--space-4);
    gap: var(--space-8);
  }
}

/* Fibra Óptica minicourse */
.course-overview {
    padding: var(--space-24) 0;
    background: linear-gradient(140deg, rgba(0, 40, 85, 0.92) 0%, rgba(59, 130, 246, 0.15) 100%);
}

.course-overview__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-12);
    align-items: stretch;
}

.course-overview__card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: var(--space-10);
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    box-shadow: 0 20px 45px -20px rgba(15, 23, 42, 0.6);
}

.course-overview__card--highlight {
    border-color: rgba(59, 130, 246, 0.45);
    background: rgba(15, 23, 42, 0.8);
}

.course-overview__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    list-style: none;
}

.course-overview__list li {
    position: relative;
    padding-left: var(--space-6);
    color: var(--text-secondary);
}

.course-overview__list li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--accent-cyan);
}

.course-overview__heading {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.course-speaker {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.course-speaker__photo {
    width: 88px;
    height: 88px;
    object-fit: cover;
    border-radius: 50%;
    border: 3px solid rgba(59, 130, 246, 0.4);
}

.course-speaker__name {
    font-weight: 700;
    font-size: var(--font-size-lg);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.course-speaker__bio {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.course-meta {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.course-meta__item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.02);
}

.course-details {
    padding: var(--space-24) 0;
}

.course-details__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-8);
}

.course-details__item {
    background: rgba(15, 23, 42, 0.65);
    padding: var(--space-8);
    border: 1px solid rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    min-height: 220px;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.course-details__item h3 {
    font-size: var(--font-size-xl);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.course-details__item p {
    color: var(--text-secondary);
}

.course-cta {
    padding: var(--space-24) 0 var(--space-32);
    background: linear-gradient(160deg, rgba(0, 40, 85, 0.95), rgba(15, 23, 42, 0.95));
}

.course-cta__card {
    max-width: 880px;
    margin: 0 auto;
    text-align: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: var(--space-12);
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    box-shadow: 0 25px 45px -30px rgba(8, 47, 73, 0.8);
}

.course-cta__card h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.course-cta__card p {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
}

.course-cta__actions {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

@media (max-width: 1024px) {
    .course-overview__grid {
        grid-template-columns: 1fr;
    }

    .course-meta {
        grid-template-columns: 1fr;
    }

    .course-details__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .course-agenda__list li {
        grid-template-columns: 1fr;
        text-align: left;
    }
}

@media (max-width: 768px) {
    .course-overview {
        padding: var(--space-16) 0;
    }

    .course-overview__card,
    .course-cta__card {
        padding: var(--space-8);
    }

    .course-details {
        padding: var(--space-16) 0;
    }

    .course-details__grid {
        grid-template-columns: 1fr;
    }

    .course-speaker {
        flex-direction: column;
        text-align: center;
    }

    .course-speaker__photo {
        width: 96px;
        height: 96px;
    }

    .course-cta__actions {
        flex-direction: column;
        gap: var(--space-3);
    }

    .course-overview__card,
    .course-details__item,
    .course-cta__card {
        box-shadow: none;
    }

    .course-overview__grid,
    .course-details__grid {
        gap: var(--space-6);
    }
}

@media (max-width: 480px) {
    .course-overview__card,
    .course-details__item,
    .course-cta__card {
        padding: var(--space-6);
    }

    .course-speaker__photo {
        width: 88px;
        height: 88px;
    }

    .course-overview__list li {
        font-size: var(--font-size-sm);
    }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}

/* Ensure anchors with id="form" aren't hidden under fixed header */
#form { scroll-margin-top: 80px; }
#inscricao { scroll-margin-top: 96px; }