:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --secondary: #64748b;
    --success: #22c55e;
    --success-hover: #16a34a;
    --danger: #ef4444;
    --accent: #f59e0b;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; }

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    padding: 12px;
}

.app-container {
    max-width: 900px;
    margin: 0 auto;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 10px;
}

.logo-box {
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo-box .icon { font-size: 28px; }
.logo-box h1 { font-size: 20px; font-weight: 700; color: #fff; }
.logo-box h1 small { font-size: 12px; color: var(--primary); font-weight: 500; display: block; }

.struct-selector select {
    background: #0f172a;
    color: #fff;
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 14px;
}

.app-nav {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.nav-btn {
    flex: 1;
    padding: 12px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    font-size: 15px;
    transition: all 0.2s;
}

.nav-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
}

.card h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 6px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

select, input[type="text"], input[type="number"] {
    background: #0f172a;
    color: #fff;
    border: 1px solid var(--border-color);
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 15px;
    width: 100%;
}

select:focus, input:focus {
    outline: none;
    border-color: var(--primary);
}

.btn {
    padding: 10px 16px;
    border-radius: 8px;
    border: none;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: var(--secondary); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: var(--success-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-block { width: 100%; }
.btn-lg { padding: 14px; font-size: 16px; }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-outline { background: transparent; border: 1px solid var(--border-color); color: var(--text-color); }
.btn-outline:hover { background: #334155; }

.scan-card.disabled {
    opacity: 0.5;
    pointer-events: none;
}

.scanner-controls { margin-bottom: 12px; }

.video-container {
    position: relative;
    background: #000;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 12px;
    text-align: center;
}

.scan-video {
    width: 100%;
    max-height: 250px;
    object-fit: cover;
}

.input-group {
    display: flex;
    gap: 8px;
}

.product-info-box {
    margin-top: 16px;
    background: #0f172a;
    border: 1px solid var(--primary);
    padding: 16px;
    border-radius: 10px;
}

.pro-details {
    margin-bottom: 14px;
}

.pro-code {
    font-size: 18px;
    font-weight: 800;
    color: var(--primary);
}

.pro-lib {
    font-size: 16px;
    color: #fff;
    margin-top: 4px;
}

.qte-saisie-box {
    margin-bottom: 16px;
}

.qte-input-group {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-top: 6px;
    margin-bottom: 10px;
}

.btn-qte {
    width: 48px;
    height: 48px;
    font-size: 20px;
    background: #334155;
    color: #fff;
}

.qte-input-group input {
    text-align: center;
    font-size: 22px;
    font-weight: bold;
    height: 48px;
}

.qte-quick-btns {
    display: flex;
    gap: 8px;
}

.history-list {
    list-style: none;
    font-size: 13px;
}

.history-list li {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
}

.history-list li.empty { color: var(--text-muted); font-style: italic; }

.table-responsive {
    overflow-x: auto;
    margin-top: 12px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 14px;
}

.data-table th, .data-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: #0f172a;
    color: var(--primary);
}

.pagination-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 16px;
}

.hidden { display: none !important; }
.tab-content { display: none; }
.tab-content.active { display: block; }
.text-center { text-align: center; }