:root {
    --bg-1: #4b3f96;
    --bg-2: #7b5cc7;
    --bg-3: #3aa1a0;
    --glass-bg: rgba(255, 255, 255, 0.55);
    --glass-bg-strong: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(255, 255, 255, 0.45);
    --glass-shadow: 0 8px 32px rgba(31, 20, 70, 0.18);
    --text-main: #241f3d;
    --text-muted: #5c5578;
    --accent: #5b3fd6;
    --accent-dark: #40279c;
    --radius: 18px;
    --radius-sm: 12px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    min-height: 100%;
    font-family: 'Segoe UI', system-ui, -apple-system, Roboto, sans-serif;
    color: var(--text-main);
}

body {
    background: linear-gradient(135deg, var(--bg-1), var(--bg-2) 55%, var(--bg-3));
    background-attachment: fixed;
    min-height: 100vh;
}

a { color: var(--accent-dark); }

.app-shell { display: flex; flex-direction: column; min-height: 100vh; }

/* --- Glass primitives --- */
.glass {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    backdrop-filter: blur(18px) saturate(160%);
    -webkit-backdrop-filter: blur(18px) saturate(160%);
    box-shadow: var(--glass-shadow);
}

.card {
    padding: 24px;
    margin-bottom: 20px;
}

.card h2, .card h3 { margin-top: 0; }

/* --- Navbar --- */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    margin: 16px;
    position: sticky;
    top: 0;
    z-index: 50;
}

.navbar .brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-main);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    padding: 8px 14px;
    border-radius: 999px;
    font-size: 0.92rem;
    font-weight: 600;
    transition: background 0.15s ease;
}

.nav-links a:hover, .nav-links a.active {
    background: rgba(255, 255, 255, 0.55);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

.avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    color: var(--text-main);
}

.main-content {
    flex: 1;
    max-width: 1180px;
    width: 100%;
    margin: 0 auto;
    padding: 0 16px 60px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: none;
    border-radius: var(--radius-sm);
    padding: 10px 18px;
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.1s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 6px 16px rgba(91, 63, 214, 0.35); }
.btn-primary:hover { background: var(--accent-dark); }
.btn-success { background: #1f9d67; color: #fff; }
.btn-danger { background: #d64545; color: #fff; }
.btn-secondary { background: rgba(255,255,255,0.6); color: var(--text-main); border: 1px solid var(--glass-border); }
.btn-sm { padding: 6px 12px; font-size: 0.82rem; }
.btn-block { width: 100%; justify-content: center; }

/* --- Forms --- */
label { font-weight: 600; font-size: 0.85rem; color: var(--text-muted); display: block; margin-bottom: 4px; }

input[type=text], input[type=number], input[type=date], input[type=search], select, textarea {
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(90, 70, 150, 0.25);
    background: rgba(255, 255, 255, 0.7);
    font-size: 0.92rem;
    color: var(--text-main);
}
textarea { resize: vertical; min-height: 70px; }
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(91, 63, 214, 0.18);
}

.form-row { display: grid; gap: 14px; margin-bottom: 14px; }
.form-grid-2 { grid-template-columns: 1fr 1fr; }
.form-grid-3 { grid-template-columns: 1fr 1fr 1fr; }
.form-grid-4 { grid-template-columns: 1fr 1fr 1fr 1fr; }

/* --- Table --- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid rgba(90,70,150,0.12); }
th { color: var(--text-muted); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.03em; }
tbody tr:hover { background: rgba(255,255,255,0.35); }

/* --- Badges --- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    white-space: nowrap;
}
.badge-brouillon { background: #e2e0ea; color: #4a4460; }
.badge-en_attente { background: #ffe6b3; color: #8a5a00; }
.badge-en_validation { background: #cfe3ff; color: #1c4f9c; }
.badge-valide { background: #c9f0d8; color: #146c3d; }
.badge-finalise { background: #bdeeeb; color: #106b64; }
.badge-refuse { background: #f8d0d0; color: #9c2020; }

/* --- Alerts / flash --- */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
    font-size: 0.9rem;
    font-weight: 600;
}
.alert-success { background: rgba(31, 157, 103, 0.18); color: #146c3d; }
.alert-error { background: rgba(214, 69, 69, 0.18); color: #9c2020; }
.alert-warning { background: rgba(255, 179, 0, 0.2); color: #8a5a00; }

/* --- Dropzone --- */
.dropzone {
    border: 2px dashed rgba(91, 63, 214, 0.4);
    border-radius: var(--radius-sm);
    padding: 22px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
}
.dropzone.dragover { background: rgba(91, 63, 214, 0.12); border-color: var(--accent); }
.dropzone input[type=file] { display: none; }
.file-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.6);
    border: 1px solid var(--glass-border);
    border-radius: 999px;
    padding: 4px 10px;
    font-size: 0.78rem;
    margin: 3px 4px 0 0;
}

/* --- Ligne group (par fournisseur) --- */
.fournisseur-group { margin-bottom: 18px; }
.fournisseur-group h4 {
    margin: 0 0 8px;
    font-size: 0.9rem;
    color: var(--accent-dark);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* --- Login page --- */
.login-wrap {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.login-card { width: 100%; max-width: 380px; padding: 36px 30px; text-align: center; }
.login-card h1 { font-size: 1.3rem; margin-bottom: 6px; }
.login-card p { color: var(--text-muted); font-size: 0.88rem; margin-bottom: 24px; }
.ms-btn {
    display: flex; align-items: center; justify-content: center; gap: 10px;
    background: #fff; color: #252525; font-weight: 600;
    border-radius: var(--radius-sm); padding: 12px 18px; text-decoration: none;
    box-shadow: 0 4px 14px rgba(0,0,0,0.15);
}

/* --- Utility --- */
.muted { color: var(--text-muted); }
.text-right { text-align: right; }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.flex { display: flex; gap: 10px; align-items: center; }
.flex-between { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.empty-state { text-align: center; padding: 40px 20px; color: var(--text-muted); }
.stat { padding: 18px; }
.stat .value { font-size: 1.8rem; font-weight: 800; color: var(--accent-dark); }
.stat .label { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .03em; }
.grid-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 20px; }

/* --- Responsive --- */
@media (max-width: 860px) {
    .grid-stats { grid-template-columns: repeat(2, 1fr); }
    .form-grid-2, .form-grid-3, .form-grid-4 { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
    .nav-toggle { display: block; }
    .nav-links, .nav-user { display: none; width: 100%; }
    .navbar { flex-wrap: wrap; }
    .navbar.open .nav-links, .navbar.open .nav-user { display: flex; }
    .nav-links { flex-direction: column; align-items: stretch; margin-top: 10px; }
    .nav-links a { text-align: center; }
    .grid-stats { grid-template-columns: 1fr; }
    .main-content { padding: 0 10px 40px; }
    .card { padding: 16px; }
}