/* --- RESET & VARIABLES --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

:root {
    --bg-color: #ffffff;
    --card-bg: #ffffff;
    --text-color: #000000;
    --primary-color: #000000;
    --secondary-color: #333333;
    --border-color: #000000; /* Bordures noires franches */
}

/* --- MODE SOMBRE : VRAI NOIR PUR --- */
[data-theme="dark"] {
    --bg-color: #000000;         /* Vrai noir pur sans teinte bleue */
    --card-bg: #0d0d0d;         /* Fond des cartes très sombre */
    --text-color: #f1f5f9;       /* Texte blanc cassé très lisible */
    --primary-color: #ffffff;    /* Titres en blanc pur */
    --secondary-color: #94a3b8;  /* Gris neutre */
    --border-color: #222222;     /* Bordures sombres et franches */
}

/* --- BASES & BODY --- */
html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    padding: 2rem 1rem;
    line-height: 1.6;
}

/* --- CONTAINER PRINCIPAL (Style Carte Encadrée) --- */
.container {
    max-width: 900px;
    margin: 0 auto;
    background-color: var(--card-bg);
    padding: 2.5rem;
    border: 2px solid var(--border-color); /* Encadré net style dossier/CV */
    border-radius: 0px;                    /* Coins droits pour l'aspect éditorial */
    box-shadow: none;
}

/* --- BOUTON RETOUR (Texte souligné minimaliste) --- */
.btn-back {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: underline;
    text-underline-offset: 4px;
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 2rem;
    transition: opacity 0.2s ease;
}

.btn-back:hover {
    opacity: 0.6;
}

/* --- TITRE DU PROJET --- */
h1 {
    font-size: clamp(1.8rem, 4vw + 0.5rem, 2.6rem);
    color: var(--primary-color);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

/* --- MÉDIA (IMAGE OU PDF) --- */
.media-container {
    margin: 1.5rem 0 2rem 0;
    border-radius: 0px;
    overflow: hidden;
    background-color: transparent;
    border: 2px solid var(--border-color);
}

.media-container img {
    width: 100%;
    height: auto;
    max-height: 500px;
    display: block;
    object-fit: cover;
}

.media-container embed {
    width: 100%;
    height: 600px;
    border: none;
}

/* --- LIENS GITHUB & DÉMO (Style Article Souligné) --- */
.links {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.btn-link {
    display: inline-block;
    padding: 0;
    background: transparent;
    color: var(--primary-color);
    text-decoration: underline;
    text-underline-offset: 4px;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    border-radius: 0;
    transition: opacity 0.2s ease;
}

.btn-link:hover {
    opacity: 0.6;
    background: transparent;
}

/* --- SÉPARATEUR MÉTALLIQUE / NET --- */
hr {
    border: none;
    height: 2px;
    background-color: var(--border-color);
    margin: 2rem 0;
}

/* --- ZONE DE CONTENU TEXTUEL --- */
.content {
    color: var(--text-color);
    font-size: 1.05rem;
    line-height: 1.8;
    white-space: pre-wrap;
}

.content h2, .content h3 {
    color: var(--primary-color);
    font-weight: 700;
    text-transform: uppercase;
    margin-top: 1.8rem;
    margin-bottom: 0.6rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.3rem;
}

.content p {
    margin-bottom: 1.2rem;
}

/* --- RESPONSIVE MOBILE --- */
@media (max-width: 600px) {
    body {
        padding: 1rem 0.5rem;
    }

    .container {
        padding: 1.25rem;
    }

    .links {
        flex-direction: column;
        gap: 0.8rem;
    }

    .media-container embed {
        height: 400px;
    }
}