/* RESET & BASE */
* {
    box-sizing: border-box;
}

body {
    background-color: #f8f9fa; /* Gris très clair pour le fond */
    color: #333333;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    font-size: 16px;
}

/* LAYOUT */
.container {
    max-width: 900px;
    margin: 40px auto;
    padding: 40px;
    background-color: #ffffff;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05); /* Légère ombre pour effet "papier" */
    border-radius: 8px;
}

/* TYPOGRAPHY */
h1, h2, h3 {
    color: #1a1a1a;
    font-weight: 700;
    line-height: 1.3;
    margin-top: 2em;
    margin-bottom: 0.5em;
}

h1 {
    font-size: 2.5rem;
    margin-top: 0;
    padding-bottom: 15px;
    border-bottom: 2px solid #e9ecef;
    color: #0056b3; /* Bleu universitaire */
}

h2 {
    font-size: 1.75rem;
    padding-bottom: 8px;
    border-bottom: 1px solid #eee;
}

h3 {
    font-size: 1.25rem;
    color: #444;
    margin-top: 1.5em;
}

p {
    margin-bottom: 1.2rem;
    text-align: justify; /* Pour des blocs de texte propres */
}

a {
    color: #0056b3;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

a:hover {
    color: #003d80;
    text-decoration: underline;
}

/* LISTS */
ul {
    margin-bottom: 1.5rem;
    padding-left: 20px;
}

li {
    margin-bottom: 0.5rem;
}

/* CODE & FILES STYLING */
code {
    background-color: #f1f3f5;
    color: #d63384; /* Couleur rose/rouge pour le code */
    padding: 2px 6px;
    border-radius: 4px;
    font-family: "Consolas", "Monaco", monospace;
    font-size: 0.9em;
    border: 1px solid #e9ecef;
}

/* SPECIAL SECTIONS */
.alert-box {
    background-color: #e7f5ff; /* Fond bleu très clair */
    border-left: 5px solid #0056b3;
    padding: 20px;
    border-radius: 4px;
    margin: 2rem 0;
}

.alert-box h2 {
    margin-top: 0;
    border-bottom: none;
    color: #004085;
}

.note {
    font-style: italic;
    color: #666;
    margin-top: 20px;
}

/* UTILITIES */
hr {
    border: 0;
    height: 1px;
    background: #ddd;
    margin: 3rem 0;
}

/* MOBILE RESPONSIVENESS */
@media (max-width: 768px) {
    .container {
        margin: 0;
        border-radius: 0;
        padding: 20px;
    }
    
    h1 {
        font-size: 2rem;
    }
}