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

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --danger: #dc2626;
    --success: #16a34a;
    --bg: #f1f5f9;
    --card: #fff;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-light: #64748b;
    --radius: 8px;
}

body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: var(--bg); color: var(--text); }

header {
    background: var(--primary);
    color: #fff;
    padding: 0 20px;
    height: 52px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner { display: flex; align-items: center; gap: 16px; width: 100%; max-width: 1200px; margin: 0 auto; }
.header-title { font-size: 18px; font-weight: 700; cursor: pointer; }
.header-user { margin-left: auto; display: flex; align-items: center; gap: 12px; font-size: 13px; }
.header-user button { background: rgba(255,255,255,0.15); border: none; color: #fff; padding: 6px 12px; border-radius: var(--radius); cursor: pointer; font-size: 13px; display: flex; align-items: center; gap: 6px; }
.header-user button:hover { background: rgba(255,255,255,0.25); }

.header-nav { display: flex; gap: 4px; }
.header-nav button { background: rgba(255,255,255,0.1); border: none; color: rgba(255,255,255,0.8); padding: 6px 14px; border-radius: var(--radius); cursor: pointer; font-size: 13px; font-weight: 500; }
.header-nav button.active, .header-nav button:hover { background: rgba(255,255,255,0.25); color: #fff; }

.container { max-width: 1200px; margin: 0 auto; padding: 20px; }

/* Login */
.login-container { display: flex; justify-content: center; align-items: center; min-height: calc(100vh - 52px); }
.login-card { background: var(--card); padding: 40px; border-radius: 12px; box-shadow: 0 4px 24px rgba(0,0,0,0.08); width: 380px; }
.login-card h2 { text-align: center; margin-bottom: 8px; }
.login-subtitle { text-align: center; color: var(--text-light); margin-bottom: 24px; font-size: 14px; }
.login-error { color: var(--danger); font-size: 13px; margin-bottom: 12px; padding: 8px; background: #fef2f2; border-radius: var(--radius); }
.login-hint { text-align: center; font-size: 13px; color: var(--text-light); }
.login-hint a { color: var(--primary); }
.login-divider { border-top: 1px solid var(--border); margin: 16px 0; }

/* Forms */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 4px; color: var(--text-light); }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: var(--radius);
    font-size: 14px; font-family: inherit;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-row { display: flex; gap: 12px; }
.form-row .form-group { flex: 1; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border: none; border-radius: var(--radius); cursor: pointer; font-size: 13px; font-weight: 600; font-family: inherit; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-secondary:hover { background: #cbd5e1; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-success { background: var(--success); color: #fff; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

/* Cards & Tables */
.card { background: var(--card); border-radius: var(--radius); box-shadow: 0 1px 3px rgba(0,0,0,0.06); padding: 20px; margin-bottom: 16px; }
.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.card-header h3 { font-size: 16px; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { text-align: left; padding: 10px 12px; border-bottom: 2px solid var(--border); font-weight: 600; color: var(--text-light); font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
tr:hover { background: #f8fafc; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

/* Toolbar */
.toolbar { display: flex; gap: 10px; align-items: center; margin-bottom: 16px; flex-wrap: wrap; }
.toolbar select { padding: 7px 12px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 13px; }

/* Modal */
.modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.4); display: flex; justify-content: center; align-items: center; z-index: 200; }
.modal { background: var(--card); border-radius: 12px; padding: 24px; width: 560px; max-width: 95vw; max-height: 90vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.15); }
.modal h3 { margin-bottom: 16px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; }

/* Ecritures */
.lignes-table input { width: 100%; padding: 5px 8px; border: 1px solid var(--border); border-radius: 4px; font-size: 13px; }
.lignes-table select { padding: 5px 8px; border: 1px solid var(--border); border-radius: 4px; font-size: 13px; width: 100%; }
.ligne-total { font-weight: 700; background: #f8fafc; }

.hidden { display: none !important; }

/* Responsive */
@media (max-width: 768px) {
    .container { padding: 12px; }
    .form-row { flex-direction: column; gap: 0; }
    .modal { padding: 16px; width: 100%; }
}