/* === RESET & BASE === */

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

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

body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', system-ui, sans-serif;
    line-height: 1.6;
    color: #1a1a2e;
    background-color: #f8f9fc;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}


/* === NAVIGATION === */

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, #002395, #d21034);
    padding: 0.75rem 1.25rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: #f1c40f;
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

.nav-menu a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    transition: background 0.2s, color 0.2s;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: rgba(255, 255, 255, 0.15);
    color: #f1c40f;
}


/* Hamburger mobile */

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    gap: 5px;
}

.nav-toggle .bar {
    width: 28px;
    height: 3px;
    background: #fff;
    border-radius: 2px;
}


/* === CONTAINER === */

.container {
    flex: 1;
    width: 95%;
    max-width: 800px;
    margin: 2rem auto;
    padding: 0.5rem;
}


/* === HOME PAGE === */

.hero {
    text-align: center;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.2rem;
    color: #002395;
    margin-bottom: 0.5rem;
}

.hero .lead {
    font-size: 1.1rem;
    color: #333;
    margin-bottom: 0.75rem;
}


/* === FORM === */

.start-form {
    background: #fff;
    border-radius: 16px;
    padding: 1.8rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    max-width: 460px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: #002395;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 2px solid #ccd1d9;
    border-radius: 10px;
    font-size: 1rem;
    transition: border 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    border-color: #002395;
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 35, 149, 0.15);
}

.btn {
    display: inline-block;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    text-align: center;
    width: 100%;
    background: #d21034;
    color: #fff;
    padding: 0.9rem;
    font-size: 1.1rem;
    letter-spacing: 0.5px;
}

.btn:hover {
    background: #b00d2a;
    transform: translateY(-1px);
}

.btn-secondary {
    background: #f1f5f9;
    color: #1a1a2e;
    border: 2px solid #ccd1d9;
}

.btn-secondary:hover {
    border-color: #002395;
    background: #e8f0fe;
}


/* === FOOTER === */

.footer {
    background: #002395;
    color: rgba(255, 255, 255, 0.85);
    text-align: center;
    padding: 1rem;
    margin-top: auto;
    font-size: 0.9rem;
}


/* === QUIZ PAGES === */

.welcome-message {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    text-align: center;
}

.card {
    background: #fff;
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
    margin-bottom: 1.5rem;
}

.card h2,
.card h3 {
    margin-bottom: 1rem;
    color: #002395;
}

.subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 0.8rem;
}

.subject-btn {
    background: #f1f5f9;
    border: 2px solid transparent;
    border-radius: 12px;
    padding: 0.9rem 0.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    text-align: center;
    color: #1a1a2e;
    transition: 0.2s;
    cursor: pointer;
}

.subject-btn:hover,
.subject-btn.active {
    border-color: #002395;
    background: #dce8fa;
}


/* === QUIZ CONTAINER (dynamique) === */

#quizContainer {
    margin-top: 1rem;
}

.question-block {
    margin-bottom: 1.5rem;
}

.question-text {
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.option-btn {
    display: block;
    width: 100%;
    text-align: left;
    background: #f8f9fc;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    cursor: pointer;
    transition: 0.15s;
    font-size: 0.95rem;
}

.option-btn:hover {
    border-color: #002395;
    background: #eef2ff;
}

.option-btn.correct {
    background: #d4edda;
    border-color: #28a745;
    color: #155724;
}

.option-btn.wrong {
    background: #f8d7da;
    border-color: #dc3545;
    color: #721c24;
}

.explication {
    background: #fff9e6;
    border-left: 4px solid #f1c40f;
    padding: 0.8rem;
    margin-top: 0.5rem;
    border-radius: 0 8px 8px 0;
    font-size: 0.9rem;
}

.score-display {
    font-size: 1.2rem;
    font-weight: 700;
    text-align: center;
    margin: 1rem 0;
    color: #002395;
}


/* === RESPONSIVE === */

@media (max-width: 640px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #002395;
        padding: 1rem;
    }
    .nav-menu.show {
        display: flex;
    }
    .nav-toggle {
        display: flex;
    }
    .hero h1 {
        font-size: 1.6rem;
    }
    .start-form {
        padding: 1.2rem;
    }
    .container {
        margin: 1rem auto;
    }
}