/**
 * Questão Individual - Estude Grátis
 * Estilos específicos para página de questão isolada
 */

/* =====================================================
   VARIÁVEIS LOCAIS (Aliases)
   ===================================================== */
:root {
    --radius-sm: var(--border-radius-sm, 4px);
    --radius-md: var(--border-radius-md, 8px);
    --radius-lg: var(--border-radius-lg, 16px);
    --radius-full: var(--border-radius-full, 9999px);
}

/* =====================================================
   BREADCRUMB
   ===================================================== */
.questao-breadcrumb {
    background: var(--bg-dark);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-gray-800);
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin: 0;
    padding: 0;
    list-style: none;
}

.breadcrumb-list li {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.breadcrumb-list a {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: color 0.2s ease;
}

.breadcrumb-list a:hover {
    color: var(--color-primary);
}

.breadcrumb-separator {
    color: var(--text-muted);
    opacity: 0.5;
}

.breadcrumb-list .current {
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* =====================================================
   QUESTÃO PAGE LAYOUT
   ===================================================== */
.questao-page {
    background: var(--color-gray-50);
    min-height: 60vh;
}

.questao-content {
    padding: var(--space-6) 0;
}

.questao-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--space-6);
    align-items: start;
}

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

/* =====================================================
   QUESTÃO MAIN CARD
   ===================================================== */
.questao-main {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color, #E2E8F0);
    overflow: hidden;
}

/* Header */
.questao-main .questao-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    background: linear-gradient(135deg, #111 0%, #1a1a2e 100%);
    color: #fff;
}

.questao-id-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 182, 4, 0.15);
    backdrop-filter: blur(10px);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(255, 182, 4, 0.3);
    flex-shrink: 0;
}

.questao-id-badge .badge-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: rgba(255, 255, 255, 0.7);
}

.questao-id-badge .badge-number {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: #FFB604;
}

.questao-meta-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: wrap;
    flex: 1;
    min-width: 0;
}

.questao-meta-info .meta-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.85);
    white-space: nowrap;
}

.questao-meta-info .meta-item i {
    color: #FFB604;
    font-size: 12px;
}

.questao-meta-info .meta-item.highlight {
    background: rgba(255, 182, 4, 0.15);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-weight: 600;
    color: #FFB604;
    border: 1px solid rgba(255, 182, 4, 0.25);
    font-size: 12px;
}

.questao-actions {
    display: flex;
    gap: var(--space-2);
}

.questao-actions .action-btn {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
}

.questao-actions .action-btn:hover {
    background: rgba(255, 182, 4, 0.2);
    border-color: #FFB604;
    color: #FFB604;
    transform: scale(1.1);
}

/* Tags */
.questao-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-gray-100);
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: all 0.2s ease;
}

.tag-materia {
    background: var(--color-primary-50);
    color: var(--color-primary);
    font-weight: 600;
}

.tag-materia:hover {
    background: var(--color-primary);
    color: var(--color-dark);
}

.tag-assunto {
    background: var(--color-gray-100);
    color: var(--text-secondary);
}

.tag-assunto:hover {
    background: var(--color-gray-200);
    color: var(--text-primary);
}

.tag-more {
    background: var(--color-gray-200);
    color: var(--text-muted);
    font-weight: 600;
}

/* Prova Info */
.questao-prova {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--color-gray-50);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.questao-prova i {
    color: var(--color-primary);
}

.questao-prova .separator {
    opacity: 0.5;
}

/* Enunciado */
.questao-enunciado {
    padding: var(--space-6) var(--space-5);
    font-size: var(--font-size-base);
    line-height: 1.8;
    color: var(--text-primary);
}

.questao-enunciado p {
    margin-bottom: var(--space-4);
}

.questao-enunciado img {
    max-width: 100%;
    height: auto;
    margin: var(--space-4) 0;
    border-radius: var(--radius-md);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* =====================================================
   ALTERNATIVAS
   ===================================================== */
.questao-alternativas {
    padding: 0 var(--space-5) var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.alternativa {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--color-gray-50);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.2s ease;
}

.alternativa:hover:not(.correta):not(.incorreta) {
    background: white;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.alternativa.selected {
    background: var(--color-primary-50);
    border-color: var(--color-primary);
}

.alternativa-radio {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.alternativa-marker {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border: 2px solid var(--color-gray-300);
    border-radius: 50%;
    font-weight: 700;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.alternativa.selected .alternativa-marker {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-dark);
}

.alternativa-texto {
    flex: 1;
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
}

/* Alternativa Correta */
.alternativa.correta {
    background: var(--color-success-50);
    border-color: var(--color-success);
}

.alternativa.correta .alternativa-marker {
    background: var(--color-success);
    border-color: var(--color-success);
    color: white;
}

/* Alternativa Incorreta */
.alternativa.incorreta {
    background: var(--color-error-50);
    border-color: var(--color-error);
}

.alternativa.incorreta .alternativa-marker {
    background: var(--color-error);
    border-color: var(--color-error);
    color: white;
}

/* =====================================================
   CERTO/ERRADO
   ===================================================== */
.questao-certo-errado {
    display: flex;
    gap: var(--space-4);
    padding: 0 var(--space-5) var(--space-5);
    justify-content: center;
}

.certo-errado-btn {
    flex: 1;
    max-width: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    font-size: var(--font-size-lg);
    font-weight: 600;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    background: white;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.certo-errado-btn:hover:not(:disabled) {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.certo-errado-btn.selected {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-dark);
}

.certo-errado-btn.correta {
    background: var(--color-success);
    border-color: var(--color-success);
    color: white;
}

.certo-errado-btn.incorreta {
    background: var(--color-error);
    border-color: var(--color-error);
    color: white;
}

.certo-errado-btn.gabarito {
    border-color: var(--color-success);
    box-shadow: 0 0 0 3px var(--color-success-50);
}

.certo-errado-btn:disabled {
    cursor: not-allowed;
    opacity: 0.8;
}

/* =====================================================
   SUBMIT / RESULTADO
   ===================================================== */
.questao-submit {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-5);
    background: var(--color-gray-50);
    border-top: 1px solid var(--color-gray-100);
}

.btn-responder {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    font-size: var(--font-size-lg);
    font-weight: 600;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-dark);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-responder:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(var(--color-primary-rgb), 0.4);
}

.btn-responder:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn-ver-gabarito,
.btn-resolver-novamente {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: var(--font-size-base);
    font-weight: 500;
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-ver-gabarito:hover,
.btn-resolver-novamente:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Resultado Container */
.resultado-container {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    background: white;
    border-radius: var(--radius-lg);
    border-left: 4px solid;
}

.resultado-container.acerto {
    border-color: var(--color-success);
    background: var(--color-success-50);
}

.resultado-container.erro {
    border-color: var(--color-error);
    background: var(--color-error-50);
}

.resultado-container.info {
    border-color: var(--color-info);
    background: var(--color-info-50);
}

.resultado-icon {
    font-size: 2rem;
}

.resultado-container.acerto .resultado-icon {
    color: var(--color-success);
}

.resultado-container.erro .resultado-icon {
    color: var(--color-error);
}

.resultado-container.info .resultado-icon {
    color: var(--color-info);
}

.resultado-texto {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.resultado-texto strong {
    font-size: var(--font-size-lg);
}

.resultado-texto span {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* =====================================================
   COMENTÁRIOS
   ===================================================== */
.questao-comentarios {
    padding: var(--space-5);
    border-top: 1px solid var(--color-gray-100);
}

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

.comentarios-header h2 {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.comentarios-count {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.comentarios-placeholder {
    text-align: center;
    padding: var(--space-6);
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
}

.comentarios-placeholder i {
    font-size: 2.5rem;
    color: var(--text-muted);
    margin-bottom: var(--space-3);
}

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

/* =====================================================
   SIDEBAR
   ===================================================== */
.questao-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    position: sticky;
    top: 100px;
}

.sidebar-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--space-4);
}

.sidebar-card h3 {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--color-gray-100);
}

.sidebar-card h3 i {
    color: var(--color-primary);
}

/* Stats Card */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
}

.stat-item {
    text-align: center;
    padding: var(--space-3);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
}

.stat-value {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
}

/* Botão Ver Estatísticas */
.btn-ver-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #111;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-ver-stats:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(255, 182, 4, 0.35);
}

.btn-ver-stats:active {
    transform: translateY(0);
}

/* Stats Progress Bars */
.stats-bars {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.stats-bar-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stats-bar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stats-bar-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
}

.stats-bar-value {
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--text-primary);
}

.stats-bar-track {
    height: 8px;
    background: var(--color-gray-100);
    border-radius: 4px;
    overflow: hidden;
}

.stats-bar-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.stats-bar-success {
    background: linear-gradient(90deg, #4caf50, #66bb6a);
}

.stats-bar-error {
    background: linear-gradient(90deg, #f44336, #ef5350);
}

/* Related Card */
.related-list {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--space-4);
}

.related-list li {
    border-bottom: 1px solid var(--color-gray-100);
}

.related-list li:last-child {
    border-bottom: none;
}

.related-list a {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    text-decoration: none;
    transition: all 0.2s ease;
}

.related-list a:hover {
    padding-left: var(--space-2);
}

.related-id {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-50);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
}

.related-info {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Nav Card */
.nav-buttons {
    display: flex;
    gap: var(--space-3);
}

.nav-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all 0.2s ease;
}

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

/* CTA Card */
.cta-card {
    text-align: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-dark);
}

.cta-card h3 {
    color: var(--color-dark);
    border-bottom-color: rgba(0, 0, 0, 0.1);
    justify-content: center;
}

.cta-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--space-3);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 50%;
}

.cta-icon i {
    font-size: 1.5rem;
}

.cta-card p {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    margin-bottom: var(--space-4);
}

.cta-card .btn-primary {
    background: white;
    color: var(--color-primary);
    width: 100%;
}

.cta-card .btn-primary:hover {
    background: var(--color-gray-100);
}

/* =====================================================
   MODAL
   ===================================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    max-width: 400px;
    width: 90%;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 32px;
    height: 32px;
    border: none;
    background: var(--color-gray-100);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: var(--color-gray-200);
}

.modal-content h3 {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-5);
}

/* Share Buttons */
.share-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s ease;
    color: white;
}

.share-btn.whatsapp {
    background: #25D366;
}

.share-btn.facebook {
    background: #1877F2;
}

.share-btn.twitter {
    background: #1DA1F2;
}

.share-btn.copy {
    background: var(--color-gray-700);
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.link-input {
    width: 100%;
    padding: var(--space-3);
    font-size: var(--font-size-sm);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    background: var(--color-gray-50);
    color: var(--text-secondary);
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 768px) {
    .questao-main .questao-header {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
        gap: var(--space-2);
        padding: var(--space-3);
    }

    .questao-main .questao-header .questao-actions {
        position: absolute;
        right: var(--space-3);
        top: var(--space-3);
    }

    .questao-main {
        position: relative;
    }

    .questao-meta-info {
        width: 100%;
        justify-content: flex-start;
        gap: var(--space-2);
    }

    .questao-meta-info .meta-item {
        font-size: 12px;
    }

    .certo-errado-btn {
        padding: var(--space-3) var(--space-4);
        font-size: var(--font-size-base);
    }

    .questao-sidebar {
        position: static;
    }
}

@media (max-width: 480px) {
    .questao-content {
        padding: var(--space-4) 0;
    }

    .questao-main {
        border-radius: 0;
    }

    .questao-enunciado {
        padding: var(--space-4);
    }

    .alternativa {
        padding: var(--space-3);
    }

    .alternativa-marker {
        width: 30px;
        height: 30px;
        font-size: var(--font-size-sm);
    }

    .share-buttons {
        grid-template-columns: 1fr;
    }
}