/* --- VARIABLES --- */
:root {
    --bg-dark: #1e1e1e;
    --bg-darker: #141414;
    --bg-sidebar: #252526;
    --accent: #007acc;
    --text: #d4d4d4;
    --text-muted: #858585;
    --border: #3e3e42;
    --preview-bg: #ffffff;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text);
    line-height: 1.6;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
h1, h2, h3 { color: #fff; }
h2 { margin-bottom: 20px; font-size: 1.8rem; border-left: 4px solid var(--accent); padding-left: 15px; }
p { color: var(--text-muted); margin-bottom: 15px; }
a { color: var(--accent); text-decoration: none; }

/* --- HERO --- */
.hero {
    background: var(--bg-darker);
    text-align: center;
    padding: 80px 20px;
    border-bottom: 1px solid var(--border);
}
.logo { font-size: 1.5rem; font-weight: bold; margin-bottom: 20px; color: var(--text-muted); }
.logo span { color: var(--accent); }
.hero h1 { font-size: 3rem; margin-bottom: 10px; }
.hero p { font-size: 1.2rem; max-width: 600px; margin: 0 auto 30px; }

.btn-cta {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    padding: 15px 30px;
    border-radius: 5px;
    font-weight: bold;
    font-size: 1.1rem;
    transition: 0.2s;
}
.btn-cta:hover { background: #0098ff; transform: translateY(-2px); }

/* --- SECTIONS --- */
.section {
    padding: 60px 0;
}

.bg-darker {
    background: var(--bg-darker);
    max-width: 320px;
}

/* --- MOCKUP 3 COLONNES (LE PLUS IMPORTANT) --- */
.layout-mockup {
    display: flex;
    height: 450px;
    background: var(--bg-sidebar);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

/* Colonne 1 : Sidebar */
.mock-sidebar {
    width: 220px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    padding: 10px;
    font-size: 0.9rem;
}
.sb-title { font-size: 0.7rem; color: var(--text-muted); margin-bottom: 10px; padding: 5px; text-transform: uppercase; }
.sb-item { padding: 6px 8px; cursor: pointer; border-radius: 3px; display: flex; align-items: center; }
.sb-item.active { background: #37373d; color: #fff; }
.sb-item i { margin-right: 8px; width: 15px; text-align: center; }
.fab.fa-html5 { color: #e34c26; }
.fab.fa-css3-alt { color: #264de4; }
.fab.fa-js { color: #f0db4f; }
.sb-btn { margin-top: 15px; color: var(--accent); cursor: pointer; padding: 5px; font-weight: bold; }

/* Colonne 2 : Editor */
.mock-editor { flex: 1; display: flex; flex-direction: column; background: var(--bg-dark); }
.editor-top {
    background: var(--bg-dark);
    padding: 8px 10px;
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
}
.tabs { display: flex; }
.tab {
    background: var(--bg-dark);
    padding: 5px 12px;
    font-size: 0.85rem;
    border-right: 1px solid var(--border);
    cursor: pointer;
}
.tab.active { background: #1e1e1e; border-top: 2px solid var(--accent); color: #fff; }
.actions button { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1rem; margin-left: 10px; }
.actions button:hover { color: #fff; }

.editor-content { padding: 20px; font-family: 'Consolas', monospace; font-size: 0.9rem; flex: 1; overflow: hidden; }
.c-tag { color: #569cd6; }
.c-attr { color: #9cdcfe; }
.c-val { color: #ce9178; }
.c-comment { color: #6a9955; }

/* Colonne 3 : PREVIEW (NOUVEAU) */
.mock-preview {
    width: 35%;
    background: var(--preview-bg); /* Fond blanc comme un vrai navigateur */
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}
.preview-top {
    background: #f0f0f0;
    color: #333;
    padding: 5px 10px;
    font-size: 0.8rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #ccc;
}
.refresh-btn {
    background: none; border: none; cursor: pointer; color: #555; font-size: 1rem;
}
.refresh-btn:hover { color: var(--accent); }
.preview-content { flex: 1; background: white; }

/* --- GRIDS & CARDS --- */
.step-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin-top: 30px; }
.step { background: var(--bg-dark); padding: 20px; border-radius: 8px; border: 1px solid var(--border); }
.step h3 { margin-bottom: 15px; color: var(--accent); }
pre { background: #000; padding: 15px; border-radius: 5px; overflow-x: auto; font-size: 0.9rem; }
code { font-family: 'Consolas', monospace; color: var(--green); }
.file-tree-viz { background: #000; padding: 15px; border-radius: 5px; font-family: monospace; font-size: 0.9rem; }
.indent { margin-left: 20px; }

.pro-tip {
    margin-top: 30px;
    background: rgba(206, 145, 120, 0.1);
    border-left: 4px solid #ce9178;
    padding: 15px;
    border-radius: 4px;
}

.cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; margin-top: 30px; }
.card {
    background: var(--bg-sidebar);
    padding: 25px;
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: 0.3s;
    text-align: center;
}
.card:hover { border-color: var(--accent); transform: translateY(-5px); }
.card-icon { font-size: 2.5rem; color: var(--accent); margin-bottom: 15px; }
.card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.card small { display: block; margin-top: 10px; color: var(--text-muted); font-size: 0.85rem; }
kbd { background: #333; padding: 2px 6px; border-radius: 3px; font-size: 0.8rem; border: 1px solid #555; }

footer { text-align: center; padding: 40px; background: var(--bg-darker); border-top: 1px solid var(--border); }

/* RESPONSIVE */
@media (max-width: 900px) {
    .layout-mockup { flex-direction: column; height: auto; }
    .mock-sidebar { width: 100%; height: auto; border-right: none; border-bottom: 1px solid var(--border); }
    .mock-preview { width: 100%; height: 300px; border-left: none; border-top: 1px solid var(--border); }
    .step-grid { grid-template-columns: 1fr; }
}
.Logo_contenaire{
    display: grid;
    justify-content: center;
    align-items: center;
    text-align: center;
}
img{
    width: 265px;
    height: 95px;
}
.liens{
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    gap: 3rem;
}
.step{
    max-width: 320px;
}
.container{
    width: 100%;
}