body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: #f4f7f6;
    color: #2c3e50;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    background-color: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

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

.logo {
    font-size: 1.8em;
    font-weight: 700;
    color: #1abc9c;
}

nav ul {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    text-decoration: none;
    color: #34495e;
    font-weight: 600;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #1abc9c;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://images.unsplash.com/photo-1519389950473-47ba0277781c?q=80&w=2070&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D') no-repeat center center/cover;
    color: #ffffff;
    text-align: center;
    padding: 150px 20px;
    min-height: 600px;
    margin-top: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content {
    max-width: 900px;
}

.hero h1 {
    font-size: 3.5em;
    font-weight: 700;
    margin-bottom: 20px;
}

.subtitle {
    font-size: 1.2em;
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.btn-primary, .btn-secondary {
    background-color: #1abc9c;
    color: #fff;
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: background-color 0.3s ease;
    cursor: pointer;
    font-size: 1em;
}

.btn-primary:hover {
    background-color: #16a085;
}

.btn-secondary {
    background-color: #3498db;
}

.btn-secondary:hover {
    background-color: #2980b9;
}

/* Sections */
.section-dark {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 80px 20px;
    text-align: center;
}

.section-light {
    background-color: #ffffff;
    color: #2c3e50;
    padding: 80px 20px;
    text-align: center;
}

h2 {
    font-size: 2.5em;
    font-weight: 700;
    margin-bottom: 30px;
}

/* Problem and Solution Grids */
.problem-grid, .solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.problem-item, .solution-item {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.problem-item:hover, .solution-item:hover {
    transform: translateY(-5px);
}

.problem-item h3, .solution-item h3 {
    font-size: 1.5em;
    color: #1abc9c;
    margin-bottom: 15px;
}

.problem-item p, .solution-item p {
    font-size: 1.1em;
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    max-width: 500px;
    margin: 40px auto 0;
}

.contact-form input[type="text"],
.contact-form input[type="email"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1em;
    background-color: #fff;
}

.contact-form button {
    width: 100%;
}

.form-message {
    margin-top: 15px;
    font-size: 1em;
}

/* Share Section */
#share {
    padding: 40px 20px;
    background-color: #ecf0f1;
    text-align: center;
}

/* Quiz Section in quiz.html (styles shared) */
.quiz-section {
    padding: 100px 20px;
    background-color: #f4f7f6;
    text-align: center;
}

.quiz-content {
    max-width: 600px;
    margin: 0 auto;
}

/* Quiz Styles */
.quiz-progress {
    margin-bottom: 20px;
    position: sticky;
    top: 85px;
    z-index: 999;
    background: #f4f7f6;
    padding-top: 6px;
    padding-bottom: 6px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #ddd;
    border-radius: 4px;
    overflow: hidden;
}

#progress-fill {
    height: 100%;
    background: #1abc9c;
    transition: width 0.3s ease;
}

#progress-text {
    color: #2c3e50;
    font-weight: 600;
    display: block;
    margin-top: 5px;
}

#question-container h3 {
    font-size: 1.3em;
    margin-bottom: 15px;
    color: #2c3e50;
}

.quiz-option {
    display: flex;
    align-items: center;
    padding: 10px 15px;
    margin: 10px 0;
    background: #f9f9f9;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.2s;
}

.quiz-option:hover {
    background: #ecf0f1;
}

.quiz-option input[type="radio"] {
    margin-right: 10px;
    transform: scale(1.2);
}

.quiz-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
}

.quiz-navigation button {
    padding: 10px 20px;
    width: 48%;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.2em;
    }

    .subtitle {
        font-size: 1em;
    }

    h2 {
        font-size: 2em;
    }

    nav ul {
        flex-direction: column;
        align-items: center;
        margin-top: 15px;
    }

    nav ul li {
        margin: 10px 0;
    }

    .problem-grid, .solution-grid {
        grid-template-columns: 1fr;
    }

    .quiz-content {
        width: 85%;
    }

    .quiz-navigation {
        flex-direction: column;
    }

    .quiz-navigation button {
        width: 100%;
        margin-bottom: 10px;
    }

    .quiz-navigation button:last-child {
        margin-bottom: 0;
    }
}

/* Quiz Styles - Alternativas Ajustadas */
.quiz-option {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    margin: 10px 0;
    background: #f9f9f9;
    border: 1px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.3s ease, border-color 0.3s ease;
}

.quiz-option:hover {
    background: #ecf0f1;
    border-color: #1abc9c;
}

.quiz-option input[type="radio"] {
    margin-right: 12px;
    transform: scale(1.3);
    accent-color: #1abc9c; /* Cor do rádio ajustada */
}

.quiz-option label {
    font-size: 1.1em;
    color: #2c3e50;
}

/* Navegação Desabilitada */
.btn-disabled {
    background-color: #95a5a6 !important;
    cursor: not-allowed;
    opacity: 0.6;
}

.btn-disabled:hover {
    background-color: #95a5a6 !important;
}

/* Responsive (ajuste para quiz) */
@media (max-width: 768px) {
    .quiz-option {
        padding: 10px;
    }

    .quiz-option input[type="radio"] {
        transform: scale(1.1);
    }
}

/* ---------- MÚLTIPLA ESCOLHA ---------- */
.quiz-choice {
    display: flex;
    align-items: center;
    background: #ffffff;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    padding: 14px 18px;
    margin: 12px 0;
    cursor: pointer;
    transition: all 0.25s ease;
    font-size: 1.05rem;
    color: #2c3e50;
    position: relative;
}

.quiz-choice:hover {
    border-color: #1abc9c;
    background: #f5fffa;
}

.quiz-choice.selected {
    border-color: #1abc9c;
    background: #e8f9f5;
    font-weight: 600;
}

/* radio button customizado */
.quiz-choice input[type="radio"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}
.checkmark {
    width: 22px;
    height: 22px;
    border: 2px solid #1abc9c;
    border-radius: 50%;
    margin-right: 14px;
    position: relative;
    flex-shrink: 0;
}
.quiz-choice.selected .checkmark::after {
    content: "";
    position: absolute;
    top: 50%; left: 50%;
    width: 10px; height: 10px;
    background: #1abc9c;
    border-radius: 50%;
    transform: translate(-50%, -50%);
}

/* desabilita botão */
.btn-disabled {
    background-color: #95a5a6 !important;
    cursor: not-allowed;
    opacity: .65;
}
.btn-disabled:hover { background-color: #95a5a6 !important; }