/* ============================================
   EXAM BASE STYLES - Shared across all exam pages
   Using colors from index.html (navy-dark theme)
   ============================================ */

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

:root {
    /* Colors from index.html */
    --navy-darker: #0a0e14;
    --navy-dark: #151b26;
    --navy-medium: #1f2937;
    --cyan-bright: #5dade2;
    --text-primary: #f0f4f8;
    --text-secondary: #b8c5d6;
    
    /* Additional colors for exams */
    --primary: var(--cyan-bright);
    --primary-hover: #3498db;
    --success: #10b981;
    --warning: #fbbf24;
    --danger: #ef4444;
    --background: var(--navy-darker);
    --surface: var(--navy-dark);
    --surface-elevated: var(--navy-medium);
    --border-light: rgba(255, 255, 255, 0.1);
    --border-medium: rgba(255, 255, 255, 0.2);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background);
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: white;
    padding: 0.5rem 1rem;
    text-decoration: none;
    z-index: 10000;
    border-radius: 0 0 0.25rem 0;
    font-weight: 600;
}

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

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

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(21, 27, 38, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    padding: 1rem 0;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.logo {
    text-align: center;
}

.logo-text {
    font-family: 'Playfair Display', serif;
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--cyan-bright), #3498db);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.25rem;
    display: block;
}

.logo-tagline {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    display: block;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus {
    color: var(--primary);
    outline: 2px solid transparent;
}

.nav-link:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 4px;
    border-radius: 4px;
}

/* Hamburger Menu */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.hamburger {
    width: 24px;
    height: 20px;
    position: relative;
    transform: rotate(0deg);
    transition: 0.5s ease-in-out;
}

.hamburger span {
    display: block;
    position: absolute;
    height: 3px;
    width: 100%;
    background: var(--text-primary);
    border-radius: 3px;
    opacity: 1;
    left: 0;
    transform: rotate(0deg);
    transition: 0.25s ease-in-out;
}

.hamburger span:nth-child(1) {
    top: 0px;
}

.hamburger span:nth-child(2),
.hamburger span:nth-child(3) {
    top: 8px;
}

.hamburger span:nth-child(4) {
    top: 16px;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(1) {
    top: 8px;
    width: 0%;
    left: 50%;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(2) {
    transform: rotate(45deg);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(3) {
    transform: rotate(-45deg);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(4) {
    top: 8px;
    width: 0%;
    left: 50%;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
    white-space: nowrap;
}

.btn:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 3px;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

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

.btn-secondary:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

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

.hero-section {
    color: white;
    padding: 8rem 2rem 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 500px;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='m36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
    opacity: 0.1;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-title {
    font-family: 'Playfair Display', serif;
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    opacity: 0.9;
    line-height: 1.7;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    opacity: 0.8;
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-description {
    display: block;
    font-size: 1rem;
    font-weight: 700;
}

/* ============================================
   MAIN CONTENT
   ============================================ */

.main-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 4rem 2rem;
    flex: 1;
}

.content-card {
    background: var(--surface);
    border-radius: 1rem;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-light);
    transition: all 0.6s ease;
}

.content-card.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

.section-title {
    font-family: 'Playfair Display', serif;
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    text-align: center;
    line-height: 1.2;
}

.intro-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    text-align: left;
}

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

/* Destaque Box */
.destaque-box {
    border-radius: 1rem;
    padding: 2rem;
    margin: 2rem 0;
    color: white;
    position: relative;
    overflow: hidden;
}

.destaque-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M20 20c0-5.5-4.5-10-10-10s-10 4.5-10 10 4.5 10 10 10 10-4.5 10-10zm10 0c0-5.5-4.5-10-10-10s-10 4.5-10 10 4.5 10 10 10 10-4.5 10-10z'/%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.1;
}

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

.destaque-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.destaque-text {
    font-size: 1.125rem;
    line-height: 1.7;
    opacity: 0.95;
}

/* Competencias Grid */
.competencias-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.competencia-card {
    background: var(--surface-elevated);
    border-radius: 0.75rem;
    padding: 2rem;
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

.competencia-card.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

.competencia-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
}

.competencia-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.competencia-description {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Estrategias Grid */
.estrategias-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.estrategia-card {
    background: var(--surface);
    border-radius: 0.75rem;
    padding: 1.5rem;
    border: 1px solid var(--border-light);
    text-align: center;
    transition: all 0.3s ease;
}

.estrategia-card.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

.estrategia-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
}

.estrategia-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    display: block;
}

.estrategia-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.estrategia-description {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Icon SVG */
.icon-svg {
    width: 1em;
    height: 1em;
    vertical-align: middle;
    display: inline-block;
}

/* ============================================
   ANIMATIONS
   ============================================ */

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

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

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

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

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }

    .header-container {
        padding: 0 1rem;
    }

    .header-left,
    .header-right {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 280px;
        background: var(--surface);
        flex-direction: column;
        align-items: flex-start;
        padding: 5rem 2rem 2rem;
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease-in-out;
        overflow-y: auto;
        z-index: 999;
    }

    .header-left.mobile-menu-open,
    .header-right.mobile-menu-open {
        right: 0;
    }

    .mobile-menu-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 998;
    }

    .mobile-menu-overlay.active {
        display: block;
    }

    .nav-link {
        width: 100%;
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--border-light);
    }

    .btn {
        width: 100%;
        margin-top: 1rem;
    }

    .hero-section {
        padding: 6rem 1rem 3rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .hero-stats {
        gap: 2rem;
        margin-top: 2rem;
    }

    .main-content {
        padding: 2rem 1rem;
    }

    .content-card {
        padding: 2rem;
        margin-bottom: 2rem;
    }

    .section-title {
        font-size: 1.875rem;
    }

    .competencias-grid,
    .estrategias-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

/* Tablet */
@media (min-width: 769px) and (max-width: 1024px) {
    .header-container {
        padding: 0 1.5rem;
    }

    .header-left,
    .header-right {
        gap: 1rem;
    }

    .hero-title {
        font-size: 3rem;
    }

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

/* Large screens */
@media (min-width: 1400px) {
    .header-container,
    .main-content {
        max-width: 1400px;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}