/* ===================================
   ESCOLA DE TECNOLOGIA - MODERN TECH DESIGN
   Inspired by Alura's modern aesthetic
   Dark theme with light/dark toggle
   Optimized for enrollment conversions
   =================================== */

/* ===================================
   CSS VARIABLES - DESIGN SYSTEM
   =================================== */

:root {
    /* Color Palette - Cyberpunk/Futuristic (Dark Theme) */
    --color-bg-primary: #050816;
    /* Azul quase preto */
    --color-bg-secondary: #0B1026;
    /* Azul profundo */
    --color-bg-elevated: #111A3A;
    /* Azul noturno */
    --color-surface: #0F1733;
    --color-surface-hover: #1A2347;

    /* Brand Colors - Neon Cyberpunk */
    --color-primary: #00CFFF;
    /* Azul elétrico neon */
    --color-primary-light: #00E5FF;
    --color-primary-dark: #00A8FF;
    --color-secondary: #FF00E6;
    /* Magenta neon */
    --color-secondary-light: #FF66F0;
    --color-secondary-dark: #C400FF;
    --color-accent: #9D00FF;
    /* Roxo neon */
    --color-accent-light: #B933FF;
    --color-success: #00FF9F;
    /* Verde neon */
    --color-warning: #FFB800;
    /* Amarelo neon */
    --color-error: #FF0055;
    /* Vermelho neon */

    /* Text Colors */
    --color-text-primary: #F5F7FF;
    /* Branco tecnológico */
    --color-text-secondary: #E0F2FF;
    /* Branco azulado */
    --color-text-tertiary: #8B9DC3;
    --color-text-on-primary: #050816;

    /* Borders & Dividers */
    --color-border: #1E2D5F;
    --color-border-hover: #2A3F7F;
    --color-border-neon: #00CFFF;

    /* Shadows - Cyberpunk Glow */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.6);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.7);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.8);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.9);
    --shadow-glow-blue: 0 0 20px rgba(0, 207, 255, 0.5), 0 0 40px rgba(0, 207, 255, 0.3);
    --shadow-glow-magenta: 0 0 20px rgba(255, 0, 230, 0.5), 0 0 40px rgba(255, 0, 230, 0.3);
    --shadow-glow-purple: 0 0 20px rgba(157, 0, 255, 0.5), 0 0 40px rgba(157, 0, 255, 0.3);
    --shadow-glow-gradient: 0 0 30px rgba(0, 207, 255, 0.4), 0 0 60px rgba(157, 0, 255, 0.3);

    /* Typography Scale (Golden Ratio inspired) */
    --text-xs: 0.75rem;
    /* 12px */
    --text-sm: 0.875rem;
    /* 14px */
    --text-base: 1rem;
    /* 16px */
    --text-lg: 1.125rem;
    /* 18px */
    --text-xl: 1.25rem;
    /* 20px */
    --text-2xl: 1.5rem;
    /* 24px */
    --text-3xl: 2rem;
    /* 32px */
    --text-4xl: 2.5rem;
    /* 40px */
    --text-5xl: 3rem;
    /* 48px */
    --text-6xl: 4rem;
    /* 64px */

    /* Spacing System (8-point grid) */
    --space-1: 0.5rem;
    /* 8px */
    --space-2: 1rem;
    /* 16px */
    --space-3: 1.5rem;
    /* 24px */
    --space-4: 2rem;
    /* 32px */
    --space-5: 2.5rem;
    /* 40px */
    --space-6: 3rem;
    /* 48px */
    --space-8: 4rem;
    /* 64px */
    --space-10: 5rem;
    /* 80px */
    --space-12: 6rem;
    /* 96px */

    /* Border Radius */
    --radius-sm: 0.375rem;
    /* 6px */
    --radius-md: 0.5rem;
    /* 8px */
    --radius-lg: 0.75rem;
    /* 12px */
    --radius-xl: 1rem;
    /* 16px */
    --radius-2xl: 1.5rem;
    /* 24px */
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Variables - Cyberpunk Adapted */
[data-theme="light"] {
    --color-bg-primary: #F0F4FF;
    --color-bg-secondary: #E0E8FF;
    --color-bg-elevated: #FFFFFF;
    --color-surface: #FFFFFF;
    --color-surface-hover: #F0F4FF;

    --color-text-primary: #0B1026;
    --color-text-secondary: #2A3F7F;
    --color-text-tertiary: #4A5F9F;
    --color-text-on-primary: #FFFFFF;

    --color-border: #C0D0FF;
    --color-border-hover: #A0B8FF;
    --color-border-neon: #00A8FF;

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.18);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.22);
    --shadow-glow-blue: 0 0 15px rgba(0, 207, 255, 0.3), 0 0 30px rgba(0, 207, 255, 0.15);
    --shadow-glow-magenta: 0 0 15px rgba(255, 0, 230, 0.3), 0 0 30px rgba(255, 0, 230, 0.15);
    --shadow-glow-purple: 0 0 15px rgba(157, 0, 255, 0.3), 0 0 30px rgba(157, 0, 255, 0.15);
    --shadow-glow-gradient: 0 0 20px rgba(0, 207, 255, 0.25), 0 0 40px rgba(157, 0, 255, 0.15);
}

/* ===================================
   BASE STYLES
   =================================== */

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

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

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background var(--transition-base), color var(--transition-base);
}

/* ===================================
   HEADER & NAVIGATION
   =================================== */

.top-menu {
    background: var(--color-bg-elevated);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-2) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.top-menu {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.logo img {
    max-width: 180px;
    height: auto;
    transition: transform var(--transition-base);
    filter: brightness(1.1);
}

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

.top-menu nav {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.top-menu nav ul {
    list-style: none;
    display: flex;
    gap: var(--space-4);
    align-items: center;
}

.top-menu nav li {
    position: relative;
}

.top-menu nav a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--text-sm);
    transition: color var(--transition-fast);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-md);
    display: block;
}

.top-menu nav a:hover {
    color: var(--color-primary);
    background: var(--color-surface-hover);
}

/* Theme Toggle Button */
.theme-toggle {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--text-sm);
}

.theme-toggle:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-primary);
}

/* ===================================
   HERO SECTION
   =================================== */

.titulo-descricao {
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
    padding: var(--space-12) var(--space-4);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.titulo-descricao::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 217, 255, 0.1) 0%, transparent 70%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 0.3;
        transform: scale(1);
    }

    50% {
        opacity: 0.6;
        transform: scale(1.1);
    }
}

.titulo-descricao-container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
}

.titulo-descricao-titulo {
    font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl));
    font-weight: 800;
    margin-bottom: var(--space-4);
    line-height: 1.2;
    background: linear-gradient(90deg, #00CFFF 0%, #9D00FF 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(0, 207, 255, 0.3);
    filter: drop-shadow(0 0 20px rgba(157, 0, 255, 0.4));
}

.titulo-descricao-descricao {
    font-size: clamp(var(--text-lg), 3vw, var(--text-xl));
    color: var(--color-text-secondary);
    max-width: 800px;
    margin: 0 auto;
    font-weight: 300;
}

/* ===================================
   STATISTICS SECTION
   =================================== */

.numbers-section {
    background: var(--color-bg-secondary);
    padding: var(--space-10) var(--space-4);
}

.numbers-section h2 {
    font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
    text-align: center;
    margin-bottom: var(--space-8);
    font-weight: 700;
    color: var(--color-text-primary);
}

.numbers-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--space-4);
    max-width: 1200px;
    margin: 0 auto;
}

.number {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
}

.number:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
    background: var(--color-bg-elevated);
}

.number-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-2);
    filter: grayscale(0.3);
    transition: filter var(--transition-base);
}

.number:hover .number-icon {
    filter: grayscale(0);
}

.number-value {
    font-size: var(--text-4xl);
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: var(--space-1);
    font-family: 'Inter', monospace;
}

.number-label {
    color: var(--color-text-tertiary);
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: 1.2px;
    text-transform: uppercase;
}

/* ===================================
   FEATURED HERO SECTION
   =================================== */

.featured-hero-section {
    padding: var(--space-10) var(--space-4) var(--space-6);
    background: var(--color-bg-primary);
}

.featured-hero-container {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: var(--space-5);
    max-width: 1300px;
    margin: 0 auto;
}

/* Card destaque principal (grande, à esquerda) */
.featured-main-card {
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-base);
    position: relative;
}

.featured-main-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl), var(--shadow-glow-blue);
    border-color: var(--color-primary);
}

.featured-main-img-wrap {
    position: relative;
    overflow: hidden;
    height: 380px;
}

.featured-main-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.featured-main-card:hover .featured-main-img-wrap img {
    transform: scale(1.06);
}

.featured-main-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(5, 8, 22, 0.85) 0%, transparent 60%);
}

.badge-destaque {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    background: var(--color-secondary);
    color: white;
    padding: 0.3rem 0.9rem;
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 700;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-glow-magenta);
    z-index: 2;
}

.badge-novo {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: var(--color-text-on-primary);
    padding: 0.3rem 0.9rem;
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-2);
}

.featured-main-content {
    padding: var(--space-5) var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    flex: 1;
}

.featured-main-content h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 800;
    color: var(--color-text-primary);
    line-height: 1.25;
}

.featured-main-content p {
    color: var(--color-text-secondary);
    font-size: var(--text-base);
    line-height: 1.7;
}

.featured-cta {
    display: inline-block;
    margin-top: var(--space-3);
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    color: var(--color-text-on-primary);
    padding: 0.65rem 1.5rem;
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 700;
    width: fit-content;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-glow-gradient);
}

.featured-main-card:hover .featured-cta,
.featured-side-card:hover .featured-cta {
    filter: brightness(1.15);
    box-shadow: var(--shadow-lg), var(--shadow-glow-gradient);
}

/* Stack lateral de 2 cards */
.featured-side-stack {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.featured-side-card {
    display: flex;
    flex-direction: row;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-base);
    flex: 1;
}

.featured-side-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg), 0 0 20px color-mix(in srgb, var(--card-accent, #00cfff) 30%, transparent);
    border-color: var(--card-accent, var(--color-primary));
}

.featured-side-img-wrap {
    width: 140px;
    min-width: 140px;
    overflow: hidden;
    flex-shrink: 0;
}

.featured-side-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.featured-side-card:hover .featured-side-img-wrap img {
    transform: scale(1.08);
}

.featured-side-content {
    padding: var(--space-3) var(--space-4);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    justify-content: center;
}

.featured-side-content h3 {
    font-size: var(--text-base);
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1.3;
}

.featured-side-content p {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.featured-side-content .featured-cta {
    font-size: 0.7rem;
    padding: 0.4rem 1rem;
    margin-top: var(--space-1);
}

/* ===================================
   ARTICLES GRID SECTION
   =================================== */

.articles-grid-section {
    padding: var(--space-6) var(--space-4) var(--space-10);
    max-width: 1300px;
    margin: 0 auto;
}

.articles-grid-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.articles-grid-title {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    white-space: nowrap;
}

.articles-grid-line {
    flex: 1;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), transparent);
    border-radius: var(--radius-full);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
}

/* Featured hero & grid responsive */
@media screen and (max-width: 1100px) {
    .featured-hero-container {
        grid-template-columns: 1fr;
    }

    .featured-main-img-wrap {
        height: 300px;
    }

    .featured-side-stack {
        flex-direction: row;
    }

    .featured-side-card {
        flex-direction: column;
    }

    .featured-side-img-wrap {
        width: 100%;
        min-width: unset;
        height: 160px;
    }

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

/* ===================================
   COURSE CARDS
   =================================== */

.course-section {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr));
    gap: var(--space-6);
    padding: var(--space-10) var(--space-4);
    max-width: 1400px;
    margin: 0 auto;
    background: var(--color-bg-primary);
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    transition: all var(--transition-base);
    position: relative;
    display: flex;
    flex-direction: column;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

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

.card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-xl), var(--shadow-glow-blue);
    border-color: var(--color-primary);
}

.card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.card:hover img {
    transform: scale(1.08);
}

.card h3 {
    padding: var(--space-4) var(--space-4) var(--space-2);
    font-size: var(--text-xl);
    color: var(--color-text-primary);
    line-height: 1.4;
    font-weight: 600;
    min-height: 70px;
}

.card p {
    padding: 0 var(--space-4);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    line-height: 1.7;
    flex-grow: 1;
}

/* CTA Buttons - Cyberpunk Neon Gradient */
.course-access-link,
.btn-saiba-mais-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin: var(--space-4);
    padding: var(--space-3) var(--space-6);
    background: linear-gradient(90deg, #00CFFF 0%, #9D00FF 100%);
    color: var(--color-text-on-primary);
    text-decoration: none;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: var(--text-base);
    letter-spacing: 0.3px;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm), var(--shadow-glow-gradient);
    position: relative;
    overflow: hidden;
    border: none;
    min-height: 48px;
    /* Fitts' Law - Touch target */
}

.btn-saiba-mais-primary::after {
    content: '→';
    font-family: inherit;
    margin-left: 0.2rem;
}

.course-access-link::before,
.btn-saiba-mais-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.course-access-link:hover::before,
.btn-saiba-mais-primary:hover::before {
    width: 300px;
    height: 300px;
}

.course-access-link:hover,
.btn-saiba-mais-primary:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: var(--shadow-lg), var(--shadow-glow-gradient), 0 0 50px rgba(0, 207, 255, 0.5), 0 0 80px rgba(157, 0, 255, 0.4);
    filter: brightness(1.1);
}

.course-access-link:active,
.btn-saiba-mais-primary:active {
    transform: translateY(0) scale(0.98);
}

/* Featured Course Badge */
.card.featured {
    border-color: var(--color-secondary);
    background: linear-gradient(135deg, var(--color-surface) 0%, rgba(255, 107, 53, 0.05) 100%);
}

.card.featured::after {
    content: '⭐ DESTAQUE';
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    background: var(--color-secondary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 700;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-md);
}

/* ===================================
   TESTIMONIALS SECTION
   =================================== */

.testimonials-section {
    background: var(--color-bg-secondary);
    padding: var(--space-10) var(--space-4);
}

.testimonials-section h2 {
    font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
    text-align: center;
    margin-bottom: var(--space-8);
    font-weight: 700;
}

.testimonial-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-5);
    max-width: 1200px;
    margin: 0 auto;
}

.testimonial {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    transition: all var(--transition-base);
}

.testimonial:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-left-color: var(--color-secondary);
}

.testimonial p {
    margin-bottom: var(--space-3);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    line-height: 1.8;
}

.testimonial strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

/* ===================================
   FOOTER
   =================================== */

.footer {
    background: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-primary);
    text-align: center;
    padding: var(--space-8) var(--space-4);
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
}

.social-icon {
    transition: transform var(--transition-base);
    display: inline-block;
}

.social-icon:hover {
    transform: translateY(-4px);
}

.social-icon img {
    width: 90px;
    height: auto;
    transition: filter var(--transition-base);
    filter: grayscale(0.3) brightness(0.9);
}

.social-icon:hover img {
    filter: grayscale(0) brightness(1.1);
}

.footer p {
    margin-top: var(--space-4);
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

/* ===================================
   MOBILE RESPONSIVE
   =================================== */

.hamburguer-icon {
    display: none;
    width: 30px;
    height: 30px;
    cursor: pointer;
    background-image: url('../img/bars-solid.svg');
    background-size: cover;
    transition: transform var(--transition-fast);
    filter: invert(0.7);
}

@media screen and (max-width: 768px) {
    .hamburguer-icon {
        display: block;
    }

    .hamburguer-icon:hover {
        transform: scale(1.1);
    }

    #menu ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg-elevated);
        padding: var(--space-4);
        gap: var(--space-2);
        box-shadow: var(--shadow-xl);
        border-top: 1px solid var(--color-border);
    }

    #menu.menu-aberto ul {
        display: flex;
    }

    .titulo-descricao {
        padding: var(--space-8) var(--space-4);
    }

    .course-section {
        grid-template-columns: 1fr;
        padding: var(--space-6) var(--space-3);
        gap: var(--space-4);
    }

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

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

    .theme-toggle {
        font-size: var(--text-xs);
        padding: 0.375rem 0.75rem;
    }

    /* Featured hero mobile */
    .featured-hero-section {
        padding: var(--space-6) var(--space-3) var(--space-4);
    }

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

    .featured-main-img-wrap {
        height: 220px;
    }

    .featured-side-stack {
        flex-direction: column;
    }

    .featured-side-card {
        flex-direction: row;
    }

    .featured-side-img-wrap {
        width: 110px;
        min-width: 110px;
        height: auto;
    }

    /* Articles grid mobile */
    .articles-grid-section {
        padding: var(--space-4) var(--space-3) var(--space-8);
    }

    .articles-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
}

/* ===================================
   UTILITY CLASSES
   =================================== */

/* Scroll animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Scroll animation visibility - overrides inline opacity:0 set by JS */
.card.visible,
.number.visible,
.testimonial.visible {
    opacity: 1 !important;
    transform: translateY(0) !important;
}

/* Fallback: if JS fails or is blocked, cards must still be visible */
noscript~main .card,
noscript~main .number,
noscript~main .testimonial,
noscript~.testimonials-section .testimonial {
    opacity: 1 !important;
    transform: none !important;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-text-on-primary);
    padding: var(--space-2);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: top 0.3s;
}

.skip-link:focus {
    top: 0;
}

/* Loading state */
.loading {
    animation: pulse-loading 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse-loading {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}