/**
 * Sistema de Questões para Concursos
 * Estilos principais
 */

:root {
    --primary-50: #eef2ff;
    --primary-100: #e0e7ff;
    --primary-400: #818cf8;
    --primary-500: #6366f1;
    --primary-600: #4f46e5;
    --primary-700: #4338ca;
    --success-500: #10b981;
    --success-600: #059669;
    --error-500: #ef4444;
    --error-600: #dc2626;
    --warning-500: #f59e0b;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-800: #1f2937;
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-card: rgba(26, 26, 46, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --text-primary: #ffffff;
    --text-secondary: #a5b4fc;
    --text-muted: #9ca3af;
    --border-color: rgba(255, 255, 255, 0.1);
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    --border-radius-2xl: 1.5rem;
    --border-radius-full: 9999px;
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-16: 4rem;
}

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

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

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse at top left, rgba(99, 102, 241, 0.15), transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(139, 92, 246, 0.15), transparent 50%);
    pointer-events: none;
    z-index: -1;
}

a {
    color: var(--primary-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-100);
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.page-wrapper {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    margin-left: 280px;
    padding: var(--spacing-8);
}

@media (max-width: 1024px) {
    .main-content {
        margin-left: 0;
        padding: var(--spacing-4);
    }
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-header {
    padding: var(--spacing-6);
    border-bottom: 1px solid var(--border-color);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.sidebar-logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-glow);
}

.sidebar-logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-4);
    overflow-y: auto;
}

.nav-section {
    margin-bottom: var(--spacing-6);
}

.nav-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    padding: var(--spacing-2) var(--spacing-3);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--border-radius-lg);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    margin-bottom: var(--spacing-1);
}

.nav-item:hover {
    background: var(--bg-glass);
    color: var(--text-primary);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
    color: white;
}

.nav-item-icon {
    width: 20px;
    height: 20px;
}

.sidebar-footer {
    padding: var(--spacing-4);
    border-top: 1px solid var(--border-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3);
    border-radius: var(--border-radius-lg);
    background: var(--bg-glass);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-full);
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.user-details {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-email {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.sidebar-toggle {
    display: none;
    position: fixed;
    top: var(--spacing-4);
    left: var(--spacing-4);
    z-index: 101;
    width: 44px;
    height: 44px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    color: var(--text-primary);
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-toggle {
        display: flex;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 99;
    }

    .sidebar-overlay.open {
        display: block;
    }
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-6);
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
}

.card:hover {
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: var(--shadow-lg);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-4);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.card-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: var(--spacing-1);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-8);
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-6);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--stat-color, var(--primary-500)), transparent);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.stat-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-4);
    background: rgba(99, 102, 241, 0.1);
}

.stat-card-icon svg {
    width: 24px;
    height: 24px;
    color: var(--stat-color, var(--primary-400));
}

.stat-card-value {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: var(--spacing-1);
}

.stat-card-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Questões - Estilos de alternativas */
.question-option {
    display: flex;
    align-items: stretch;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-3);
    transition: all var(--transition-fast);
    overflow: hidden;
    position: relative;
}

.question-option:hover {
    border-color: var(--primary-400);
}

.question-option.selected {
    border-color: var(--primary-500);
    background: rgba(99, 102, 241, 0.1);
}

.question-option.correct {
    border-color: var(--success-500);
    background: rgba(16, 185, 129, 0.1);
}

.question-option.incorrect {
    border-color: var(--error-500);
    background: rgba(239, 68, 68, 0.1);
}

.question-option-content {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    cursor: pointer;
}

.question-option.riscada .question-option-content {
    cursor: default;
}

.question-option-letter {
    width: 32px;
    height: 32px;
    border-radius: var(--border-radius-full);
    background: var(--primary-500);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.question-option-text {
    flex: 1;
}

/* Botão de riscar (tesoura) */
.btn-riscar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    background: transparent;
    border: none;
    border-right: 1px solid var(--border-color);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.btn-riscar:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-500);
}

.btn-riscar.active {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error-500);
}

/* Alternativa riscada */
.question-option.riscada {
    opacity: 0.5;
    position: relative;
}

.question-option.riscada::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 36px;
    right: 0;
    height: 2px;
    background: var(--error-500);
    pointer-events: none;
}

.question-option.riscada .question-option-letter {
    background: var(--gray-500);
}

.question-option.riscada .question-option-text {
    color: var(--text-muted);
}