/* Design System: Tema Claro Inspirado no SQLLab */
:root {
    --bg-app: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-hover: rgba(255, 255, 255, 0.98);
    --border-color: rgba(15, 23, 42, 0.08);
    --border-color-active: rgba(139, 92, 246, 0.45);
    
    --primary: #7c3aed; /* Violeta */
    --primary-hover: #6d28d9;
    --secondary: #0891b2; /* Ciano */
    --secondary-hover: #0369a1;
    --accent: #db2777; /* Rosa */
    
    --text-main: #0f172a; /* Slate 900 */
    --text-muted: #64748b; /* Slate 500 */
    --text-light: #94a3b8; /* Slate 400 */
    
    --success: #059669; /* Esmeralda */
    --success-bg: rgba(5, 150, 105, 0.06);
    --error: #dc2626; /* Vermelho */
    --error-bg: rgba(220, 38, 38, 0.06);
    
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Fira Code', Consolas, Monaco, monospace;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow: 0 10px 30px -10px rgba(15, 23, 42, 0.08);
    --glow: 0 0 20px rgba(139, 92, 246, 0.12);
}

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

body {
    background-color: var(--bg-app);
    background-image: 
        radial-gradient(at 10% 20%, rgba(139, 92, 246, 0.06) 0px, transparent 50%),
        radial-gradient(at 90% 80%, rgba(6, 182, 212, 0.06) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-main);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Scrollbar Personalizada */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.03);
}
::-webkit-scrollbar-thumb {
    background: rgba(15, 23, 42, 0.1);
    border-radius: var(--radius-sm);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Layout Principal */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 16px;
    gap: 24px;
    width: 100%;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 28px;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
}

.back-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-decoration: none;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.back-link:hover {
    color: var(--primary);
    background: rgba(139, 92, 246, 0.05);
    border-color: var(--border-color-active);
}

.logo h1 {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--text-main) 30%, var(--text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 8px;
}

.badge {
    font-size: 0.75rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 3px 10px;
    border-radius: 20px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    box-shadow: 0 4px 10px rgba(139, 92, 246, 0.2);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.progress-tracker {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    font-weight: 600;
}

.progress-bar-container {
    width: 150px;
    height: 8px;
    background: rgba(15, 23, 42, 0.05);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 10px;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 8px rgba(139, 92, 246, 0.3);
}

/* Layout Main Content */
.app-main {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

/* Cards Gerais */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition);
}

/* Tela Inicial */
.main-card {
    max-width: 680px;
    margin: 40px auto;
    width: 100%;
}

.start-header {
    text-align: center;
    padding: 40px 30px 20px 30px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.icon-wrap {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(139, 92, 246, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    border: 1px solid rgba(139, 92, 246, 0.15);
}

.header-icon {
    font-size: 2.2rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.start-header h2 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.5px;
    margin-bottom: 6px;
}

.subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
}

.card-body {
    padding: 30px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.info-item {
    background: rgba(15, 23, 42, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 8px;
    transition: var(--transition);
}

.info-item:hover {
    background: rgba(15, 23, 42, 0.04);
    transform: translateY(-2px);
}

.info-item i {
    font-size: 1.4rem;
    color: var(--primary);
}

.info-text strong {
    display: block;
    font-size: 0.9rem;
    color: var(--text-main);
}

.info-text span {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.instruction-box {
    background: rgba(8, 145, 178, 0.04);
    border-left: 4px solid var(--secondary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: 18px;
    margin-bottom: 24px;
}

.instruction-box h3 {
    font-size: 0.95rem;
    color: var(--secondary);
    font-weight: 700;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.instruction-box ul {
    list-style-type: none;
    padding-left: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.instruction-box li {
    font-size: 0.85rem;
    color: var(--text-main);
    position: relative;
    padding-left: 14px;
}

.instruction-box li::before {
    content: "•";
    color: var(--secondary);
    font-weight: bold;
    position: absolute;
    left: 0;
}

.form-container {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 6px;
}

.input-group label i {
    color: var(--primary);
}

.input-group input {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--border-color);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
    background: white;
}

.input-group input:focus {
    border-color: var(--primary);
    box-shadow: var(--glow);
}

.error-msg {
    color: var(--error);
    font-size: 0.8rem;
    font-weight: 600;
    display: none;
}

/* Botões */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    user-select: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: white;
    box-shadow: 0 4px 14px rgba(139, 92, 246, 0.25);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.35);
}

.btn-primary:active {
    transform: translateY(1px);
}

.btn-secondary {
    background: white;
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(15, 23, 42, 0.03);
    border-color: rgba(15, 23, 42, 0.15);
}

.btn-tertiary {
    background: transparent;
    color: var(--text-muted);
}

.btn-tertiary:hover {
    color: var(--primary);
    text-decoration: underline;
}

.btn-block {
    width: 100%;
    padding: 14px;
}

.btn:disabled, .btn-primary:disabled {
    background: #e2e8f0;
    color: #94a3b8;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

/* TELA DE QUESTÕES */
.quiz-card {
    min-height: 480px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.quiz-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    flex-grow: 1;
    min-height: 0;
}

.quiz-statement-section {
    padding: 30px;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
}

.question-header {
    display: flex;
    align-items: center;
}

.question-badge {
    background: rgba(139, 92, 246, 0.08);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 800;
    padding: 4px 12px;
    border-radius: 12px;
    border: 1px solid rgba(139, 92, 246, 0.15);
    text-transform: uppercase;
}

.question-text {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.5;
}

/* Código C# Premium no Statement */
.code-container {
    background: #0f172a; /* Fundo Escuro para legibilidade do código */
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.code-header {
    background: #1e293b;
    padding: 8px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 700;
    color: #94a3b8;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.copy-code-btn {
    background: transparent;
    border: none;
    color: #94a3b8;
    cursor: pointer;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition);
}

.copy-code-btn:hover {
    color: white;
}

.code-container pre {
    padding: 16px;
    margin: 0;
    overflow-x: auto;
}

.code-container code {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: #e2e8f0;
    line-height: 1.5;
    display: block;
}

/* Estilo sintático básico para C# no container */
.code-container .keyword { color: #f43f5e; font-weight: 600; }
.code-container .type { color: #06b6d4; }
.code-container .string { color: #10b981; }
.code-container .comment { color: #64748b; font-style: italic; }

/* Alternativas */
.quiz-alternatives-section {
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
    background: rgba(15, 23, 42, 0.01);
}

.quiz-alternatives-section h3 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.alternatives-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.alternative-option {
    display: flex;
    align-items: center;
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--border-color);
    background: white;
    cursor: pointer;
    transition: var(--transition);
    gap: 14px;
    user-select: none;
}

.alternative-option:hover {
    border-color: var(--border-color-active);
    background: rgba(139, 92, 246, 0.02);
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(139, 92, 246, 0.03);
}

.alternative-letter {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 1.5px solid var(--border-color);
    background: rgba(15, 23, 42, 0.02);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: var(--transition);
}

.alternative-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
    line-height: 1.4;
}

/* Estado selecionado */
.alternative-option.selected {
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.06);
    box-shadow: var(--glow);
}

.alternative-option.selected .alternative-letter {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.validation-warning {
    color: #d97706;
    background: rgba(217, 119, 6, 0.06);
    border: 1px solid rgba(217, 119, 6, 0.2);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
    display: none;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
    animation: slideIn 0.3s ease-out;
}

/* Footer das Questões */
.quiz-footer {
    padding: 20px 30px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: white;
}

/* TELA DE RESULTADOS */
.results-card {
    max-width: 900px;
    margin: 10px auto;
    width: 100%;
}

.results-header {
    text-align: center;
    padding: 30px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.results-icon {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-size: 2rem;
}

.results-icon.success {
    background: rgba(5, 150, 105, 0.08);
    color: var(--success);
    border: 1.5px solid rgba(5, 150, 105, 0.2);
}

.results-icon.error {
    background: rgba(220, 38, 38, 0.08);
    color: var(--error);
    border: 1.5px solid rgba(220, 38, 38, 0.2);
}

.results-header h2 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 4px;
}

.results-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.results-body {
    padding: 24px;
}

/* Métricas */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.metric-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.metric-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.metric-value {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-main);
}

/* Caixa de Feedback conforme desempenho */
.feedback-container {
    margin-bottom: 24px;
}

.feedback-box {
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid transparent;
}

.feedback-box.excellent {
    background: var(--success-bg);
    border-color: rgba(5, 150, 105, 0.2);
    color: var(--success);
}

.feedback-box.good {
    background: rgba(8, 145, 178, 0.04);
    border-color: rgba(8, 145, 178, 0.2);
    color: var(--secondary);
}

.feedback-box.poor {
    background: var(--error-bg);
    border-color: rgba(220, 38, 38, 0.2);
    color: var(--error);
}

/* Abas */
.results-tabs {
    display: flex;
    border-bottom: 1.5px solid var(--border-color);
    gap: 8px;
    margin-bottom: 20px;
}

.results-tabs .tab-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 700;
    padding: 12px 18px;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
}

.results-tabs .tab-btn:hover {
    color: var(--text-main);
}

.results-tabs .tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-pane {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.tab-pane.active {
    display: block;
}

.results-footer {
    display: flex;
    justify-content: center;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

/* Revisão de Respostas */
.review-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.review-item {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 18px;
}

.review-item.correct-card {
    border-left: 4px solid var(--success);
}

.review-item.incorrect-card {
    border-left: 4px solid var(--error);
}

.review-q-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.review-q-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-main);
}

.review-badge {
    font-size: 0.75rem;
    font-weight: 800;
    padding: 3px 8px;
    border-radius: 4px;
}

.review-badge.correct {
    background: var(--success-bg);
    color: var(--success);
}

.review-badge.incorrect {
    background: var(--error-bg);
    color: var(--error);
}

.review-q-text {
    font-size: 0.9rem;
    color: var(--text-main);
    margin-bottom: 12px;
}

.review-answers-box {
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: rgba(15, 23, 42, 0.01);
    padding: 12px;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
}

.review-ans {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.review-ans strong {
    color: var(--text-main);
}

.review-ans.selected-wrong strong {
    color: var(--error);
}

.review-ans.correct-ans strong {
    color: var(--success);
}

.review-explanation {
    background: rgba(15, 23, 42, 0.02);
    border-radius: var(--radius-sm);
    padding: 12px;
    font-size: 0.82rem;
    color: var(--text-muted);
    border-left: 3px solid var(--border-color);
}

.review-explanation strong {
    color: var(--text-main);
    display: block;
    margin-bottom: 2px;
}

/* Certificado Visual (Pronto para impressão em A4 Landscape) */
.certificate-section-wrapper {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.cert-tip {
    font-size: 0.85rem;
    color: var(--text-muted);
    background: rgba(15, 23, 42, 0.02);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 8px;
}

.cert-tip i {
    color: var(--primary);
}

.cert-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.certificate-outer-container {
    overflow-x: auto;
    width: 100%;
    display: flex;
    justify-content: center;
    padding: 15px 0;
    border-radius: var(--radius-md);
    background: rgba(15, 23, 42, 0.03);
    border: 1px solid var(--border-color);
}

/* Certificado Elemento Fixo em Pixels A4 Proporção (1000px por 707px) */
.certificate-container {
    width: 1000px;
    height: 707px;
    min-width: 1000px;
    min-height: 707px;
    background: white;
    color: #0f172a;
    padding: 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
    position: relative;
    box-sizing: border-box;
    font-family: var(--font-sans);
}

.cert-border-inner {
    border: 3px double #7c3aed; /* Borda dupla roxa */
    height: 100%;
    width: 100%;
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    box-sizing: border-box;
    background: radial-gradient(circle at 10% 10%, rgba(139, 92, 246, 0.02) 0%, transparent 60%),
                radial-gradient(circle at 90% 90%, rgba(6, 182, 212, 0.02) 0%, transparent 60%);
}

.cert-watermark {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 320px;
    height: 320px;
    opacity: 0.03;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg width='24' height='24' viewBox='0 0 24 24' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M12 2C6.48 2 2 4.02 2 6.5V17.5C2 19.98 6.48 22 12 22C17.52 22 22 19.98 22 17.5V6.5C22 4.02 17.52 2 12 2Z' stroke='%23000000' stroke-width='2'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

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

.cert-logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.cert-logo h2 {
    font-size: 1.6rem;
    font-weight: 800;
    color: #0f172a;
    letter-spacing: -0.5px;
}

.cert-logo h2 span {
    color: #7c3aed;
}

.cert-title-badge {
    border: 1px solid #7c3aed;
    color: #7c3aed;
    font-size: 0.8rem;
    font-weight: 800;
    padding: 4px 14px;
    border-radius: 20px;
    letter-spacing: 1.5px;
}

.cert-body {
    text-align: center;
    padding: 0 40px;
}

.cert-body h1 {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: 4px;
    color: #0f172a;
    margin-bottom: 24px;
    background: linear-gradient(90deg, #7c3aed, #0891b2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.cert-declaration {
    font-size: 1rem;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 600;
    margin-bottom: 12px;
}

.cert-student-name {
    font-size: 2.3rem;
    font-weight: 800;
    color: #7c3aed;
    margin-bottom: 16px;
    text-shadow: 1px 1px 2px rgba(124, 58, 237, 0.05);
}

.cert-text {
    font-size: 1.05rem;
    color: #334155;
    margin-bottom: 6px;
}

.cert-course-name {
    font-size: 1.5rem;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.cert-details {
    font-size: 0.95rem;
    color: #475569;
}

.cert-details strong {
    color: #0f172a;
    font-weight: 700;
}

.cert-footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-top: 10px;
}

.cert-signature-block {
    text-align: center;
    width: 220px;
}

.cert-signature-line {
    border-bottom: 1px solid #94a3b8;
    padding-bottom: 4px;
    margin-bottom: 8px;
    height: 40px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.signature-font {
    font-family: 'Cursive', 'Brush Script MT', 'Plus Jakarta Sans', sans-serif;
    font-size: 1.4rem;
    font-weight: 600;
    color: #475569;
    letter-spacing: 1px;
}

.signer-title {
    font-size: 0.75rem;
    font-weight: 700;
    color: #64748b;
    text-transform: uppercase;
}

.cert-seal {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.cert-seal span {
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: 1px;
    color: #64748b;
}

.cert-meta-block {
    display: flex;
    align-items: center;
    gap: 16px;
    text-align: left;
}

.qr-code-wrapper {
    background: white;
    padding: 6px;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.03);
}

#cert-qrcode canvas, #cert-qrcode img {
    display: block;
    width: 80px !important;
    height: 80px !important;
}

.cert-verification-data {
    display: flex;
    flex-direction: column;
    gap: 3px;
    max-width: 200px;
}

.cert-verification-data span {
    font-size: 0.65rem;
    color: #64748b;
    font-weight: 600;
}

.cert-verification-data strong {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    color: #0f172a;
    word-break: break-all;
    background: #f1f5f9;
    padding: 2px 4px;
    border-radius: 3px;
}

.cert-verification-data .verify-hint {
    font-size: 0.6rem;
    color: #7c3aed;
    font-weight: 700;
}

/* Footer Geral da App */
.app-footer {
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.app-footer p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Transições e Animações */
.active-screen {
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsividade geral */
@media (max-width: 900px) {
    .quiz-layout {
        grid-template-columns: 1fr;
    }
    .quiz-statement-section {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
    }
    .quiz-alternatives-section {
        padding: 20px;
    }
    .metrics-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .info-grid {
        grid-template-columns: 1fr;
    }
    .cert-actions {
        flex-direction: column;
        gap: 8px;
    }
}

@media (max-width: 600px) {
    .app-header {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
        padding: 16px;
    }
    .header-actions {
        width: 100%;
        justify-content: space-between;
    }
    .progress-bar-container {
        width: 120px;
    }
    .card-body {
        padding: 16px;
    }
    .quiz-footer {
        padding: 16px;
    }
}