:root {
    --bg-page: linear-gradient(180deg, #F8FAFC 0%, #F1F5F9 100%);
    --card-bg: #FFFFFF;
    --primary-dark: #0F172A;
    --text-main: #1E293B;
    --text-muted: #64748B;
    --border-color: #E2E8F0;
    
    --gradient-vibrant: linear-gradient(135deg, #06B6D4 0%, #7C3AED 50%, #EC4899 100%);
    --radius-card: 16px;
    --shadow-card: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

html, body {
    width: 100%;
    overflow-x: hidden;
    background: var(--bg-page);
    color: var(--text-main);
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Header Principal do site */
header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.8rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-area {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-logo-img {
    width: 38px !important;
    height: 38px !important;
    min-width: 38px !important;
    min-height: 38px !important;
    max-width: 38px !important;
    max-height: 38px !important;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 0 10px rgba(124, 58, 237, 0.2);
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 800;
    color: #000000;
    letter-spacing: -0.5px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
}

nav a {
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-main);
    transition: color 0.2s;
}

nav a:hover, nav a.active {
    color: #7C3AED;
}

.btn-login-highlight {
    background: var(--gradient-vibrant);
    color: #FFFFFF !important;
    padding: 0.45rem 1.2rem;
    border-radius: 20px;
    font-weight: 700 !important;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.25);
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-login-highlight:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(124, 58, 237, 0.35);
}

/* Radio Player com altura expandida para 70px */
.radio-wrapper {
    width: 100%;
    background: #FFFFFF;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
}

.radio-container {
    max-width: 1200px;
    width: 100%;
    height: 70px;
    overflow: hidden;
    background: #FFFFFF;
}

.radio-container iframe {
    width: 100%;
    height: 70px;
    border: none;
    display: block;
}

/* Container central entre rádio e rodapé */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1.5rem;
    flex-grow: 1;
    width: 100%;
}

/* Estilos Isolados e Escuros do Quiz */
.quiz-wrapper-scoped {
    max-width: 800px;
    margin: 0 auto;
}

/* Container do botão de voltar posicionado mais para a direita, alinhado com o card */
.quiz-back-container {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 1rem;
    padding-right: 0.2rem;
}

/* Estilo do link de voltar idêntico à referência (roxo limpo) */
.quiz-link-back {
    font-weight: 700;
    font-size: 0.95rem;
    color: #8B5CF6;
    transition: color 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.quiz-link-back:hover {
    color: #7C3AED;
    text-decoration: underline;
}

.quiz-card-dark {
    background-color: #0F172A;
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.3);
    border: 1px solid #1E293B;
}

.quiz-author-option-dark {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 1rem;
    background-color: #1E293B;
    border: 1px solid #334155;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.quiz-author-option-dark:hover {
    background-color: #273548;
    border-color: #7C3AED;
}

.quiz-btn-primary-dark {
    background: #7C3AED;
    color: #FFFFFF;
    font-weight: 600;
    padding: 0.85rem 2rem;
    border-radius: 12px;
    transition: all 0.2s;
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.4);
    border: none;
    cursor: pointer;
    display: inline-block;
}

.quiz-btn-primary-dark:hover {
    background: #6D28D9;
    transform: translateY(-1px);
}

.quiz-btn-secondary-dark {
    background-color: #1E293B;
    color: #CBD5E1;
    font-weight: 600;
    padding: 0.65rem 1.25rem;
    border-radius: 12px;
    border: 1px solid #334155;
    transition: all 0.2s;
    cursor: pointer;
}

.quiz-btn-secondary-dark:hover:not(:disabled) {
    background-color: #273548;
    color: #FFFFFF;
}

/* Rodapé Padrão */
footer {
    margin-top: auto;
    background-color: #FFFFFF;
    border-top: 1px solid var(--border-color);
    padding: 2.5rem 0 1rem 0;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.footer-brand p {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.footer-col h5 {
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
    margin-bottom: 0.8rem;
    color: var(--primary-dark);
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.footer-col a {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.footer-col a:hover {
    color: #7C3AED;
}

.copyright-bar {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem 0 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
}

@media (max-width: 850px) {
    nav ul {
        display: none;
    }
    .copyright-bar {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}