:root {
    --bleu-fonce: #0B274D;
    --bleu-clair: #1B5FA7;
    --orange: #FF9800;
    --gris-clair: #F7F7FA;
    --gris-fonce: #34384B;
    --blanc: #FFFFFF;
    --ts: #007ACC;
}

html, body {
    height: 100%;
    min-height: 100%;
}
body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    margin: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: var(--gris-clair);
    color: var(--gris-fonce);
    transition: background 0.3s, color 0.3s;
}

body.dark {
    background: #191C27;
    color: #E2E4EF;
}

header {
    background: var(--bleu-fonce);
    color: var(--blanc);
    text-align: center;
    padding: 2.2rem 1rem 1.5rem 1rem;
    border-bottom: 5px solid var(--orange);
    box-shadow: 0 2px 8px rgba(11, 39, 77, 0.09);
}

header h1 {
    margin: 0;
    font-size: 2.4rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.subtitle {
    font-size: 1.15rem;
    opacity: 0.95;
    margin: 0.7em 0 0.3em 0;
}

#themeToggle {
    margin-top: 1.3rem;
    background: var(--bleu-clair);
    color: var(--blanc);
    border: none;
    border-radius: 22px;
    padding: 0.5rem 1.1rem;
    font-size: 1rem;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.2s, color 0.2s;
    box-shadow: 0 2px 7px rgba(0, 0, 0, 0.08);
}

#themeToggle:hover {
    background: var(--orange);
    color: var(--bleu-fonce);
}

#themeToggle .theme-text {
    margin-left: 0.5em;
}

main#slides {
    flex: 1 0 auto;
    max-width: 800px;
    margin: 2.2rem auto 1rem auto;
    padding: 1rem;
    min-height: 350px;
}

section.slide {
    background: var(--blanc);
    box-shadow: 0 4px 16px rgba(11, 39, 77, 0.10);
    border-radius: 18px;
    padding: 2rem 2rem 1.5rem 2rem;
    margin-bottom: 2rem;
    display: none;
    flex-direction: column;
    gap: 1.2rem;
    min-height: 320px;
    animation: fadeIn 0.5s;
}

body.dark section.slide {
    background: #23273A;
    color: #E2E4EF;
}

section.slide.active {
    display: flex;
}

section.slide h1,
section.slide h2 {
    color: var(--bleu-fonce);
    margin-bottom: 0.2em;
    font-size: 2rem;
}

body.dark section.slide h1,
body.dark section.slide h2 {
    color: var(--orange);
}

section.slide h2 {
    font-size: 1.3em;
    font-weight: 700;
}

.le-saviez-vous, .astuce {
    background: var(--orange);
    color: var(--bleu-fonce);
    border-radius: 10px;
    padding: 0.7em 1em;
    font-size: 1.08em;
    font-style: italic;
    margin: 1em 0;
}

body.dark .le-saviez-vous, body.dark .astuce {
    background: var(--bleu-clair);
    color: var(--blanc);
}

ul, ol {
    margin: 1em 0 1em 1.3em;
}

ol code {
    background: #bdbaba;
    font-size: 1.3em;
}
body.dark ol code {
    background-color: #34384B;
}
 pre{
     background-color: #e1dede;
     padding: 1em;
     border-radius: 0.3em;
 }
body.dark pre{
    background-color: #24262b;
}

li{
    padding: 5px 0;
}

a {
    color: var(--bleu-clair);
    text-decoration: underline;
    font-weight: 500;
    transition: color 0.2s;
}

a:hover {
    color: var(--orange);
}

.slide-nav {
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.slide-nav button {
    background: var(--bleu-clair);
    color: var(--blanc);
    border: none;
    padding: 0.8rem 1.8rem;
    font-size: 1.1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    font-weight: 500;
    box-shadow: 0 3px 14px rgba(11, 39, 77, 0.08);
}

.slide-nav button:hover {
    background: var(--orange);
    color: var(--bleu-fonce);
}

footer {
    flex-shrink: 0;
    background: var(--bleu-fonce);
    color: var(--blanc);
    font-size: 1rem;
    padding: 0.5rem 1rem 0.5rem 1rem;
    border-top: 4px solid var(--orange);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.footer-links {
    display: flex;
    gap: 1.3rem;
}

footer a {
    color: var(--orange);
    font-weight: 600;
    text-decoration: none;
    transition: color 0.18s;
}

footer a:hover {
    color: var(--bleu-clair);
}

@media (max-width: 700px) {
    footer {
        flex-direction: column;
        gap: 0.6rem;
        font-size: 0.97rem;
        padding: 0.8rem 0.5rem;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
        width: 100%;
        gap: 1.1rem;
    }
}

.quiz-question {
    font-weight: bold;
}

.quiz-options label {
    display: block;
    margin: 0.6em 0;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}