* {
    outline: 1px solid red;
}


:root {
    --primary: #0b396b;
    --accent: #0073e6;
    --bg-color: #f4f6f7;
    --text-color: #333;
    --def-bg: #fffcf0;
    --prop-bg: #f0f8ff;
    --secondary: #555;
}

/* =========================
   BASE
========================= */
body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    margin: 0;
    padding: 20px;
    color: var(--text-color);
    line-height: 1.6;
}

.preparia-container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 15px;
}

/* =========================
   TITRES
========================= */
h1 {
    color: var(--primary);
    text-align: center;
    border-bottom: 3px solid var(--accent);
    padding-bottom: 15px;
    margin-bottom: 30px;
}

h2 {
    color: var(--primary);
    margin-top: 25px;
    font-size: 1.4rem;
}

h3 {
    color: var(--primary);
    margin-top: 20px;
    border-left: 4px solid var(--accent);
    padding-left: 12px;
}

h4 {
    color: var(--primary);
}

/* =========================
   ACCORDÉONS
========================= */
.accordion-item {
    background-color: #fff;
    border-radius: 10px;
    margin-bottom: 15px;
    border: 1px solid #e0e0e0;
    overflow: hidden;
}

.accordion-header {
    background-color: #f5f5f5;
    color: #000;
    padding: 18px 20px;
    cursor: pointer;
    font-size: 1.4rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.3s ease;
    flex-wrap: wrap;
    word-break: break-word;
}

.accordion-header span {
    white-space: normal;
}

.accordion-header::after {
    content: '▼';
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.accordion-item.active .accordion-header {
    background-color: var(--primary);
    color: #fff;
}

.accordion-item.active .accordion-header::after {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.content-inner {
    padding: 20px;
}

/* =========================
   BOITES
========================= */
.box {
    padding: 15px;
    margin: 15px 0;
    border-radius: 6px;
    border-left: 5px solid;
}

.definition {
    border-color: #f1c40f;
    background-color: var(--def-bg);
}

.proposition {
    border-color: #3498db;
    background-color: var(--prop-bg);
}

.remarque {
    border-color: #95a5a6;
    background-color: #f8f9fa;
}

/* =========================
   FORMULES
========================= */
.formula-box {
    background-color: #ecf0f1;
    padding: 15px;
    text-align: center;
    border-radius: 6px;
    margin: 15px 0;
    overflow-x: auto;
}

/* =========================
   TABLES RESPONSIVE
========================= */
.table-container {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    min-width: 600px;
    border-collapse: collapse;
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
}

table thead {
    background-color: var(--primary);
    color: #fff;
}

table th,
table td {
    padding: 10px 12px;
    border-bottom: 1px solid #e0e0e0;
}

table tbody tr:hover {
    background-color: #f5f5f5;
}

/* =========================
   IMAGES
========================= */
img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 10px auto;
}

.figure-container {
    text-align: center;
    margin: 25px 0;
}

.figure-caption {
    font-size: 0.9rem;
    color: #666;
    font-style: italic;
}

/* =========================
   LISTES
========================= */
ul, ol {
    padding-left: 20px;
}

li {
    margin-bottom: 8px;
}

/* =========================
   RESPONSIVE MOBILE
========================= */
@media (max-width: 768px) {

    body {
        padding: 10px;
    }

    .container {
        padding: 20px;
    }

    .accordion-header {
        font-size: 1.1rem;
        padding: 12px 15px;
    }

    .accordion-content {
        font-size: 1rem;
    }

    table {
        min-width: 100%;
        font-size: 0.9rem;
    }

    .formula-box {
        font-size: 0.95rem;
    }
}