:root {
  --bg: #0f1115;
  --bg-elevated: #171a21;
  --bg-card: #1b1f28;
  --border: #2a2f3a;
  --text: #e7e9ee;
  --text-dim: #9aa4b2;
  --primary: #6c8cff;
  --primary-dim: #4a63c9;
  --green: #3ec27f;
  --red: #f97066;
  --orange: #f7b955;
  --purple: #c084fc;
  --radius: 10px;
  font-size: 15px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Arial, sans-serif;
}
.hidden { display: none !important; }
a { color: inherit; text-decoration: none; }

/* --- Login --- */
.login-screen {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: radial-gradient(circle at top, #1a2030, #0b0d11);
}
.login-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px;
  padding: 40px 36px; width: 360px; text-align: center;
}
.login-logo { font-size: 40px; margin-bottom: 8px; }
.login-card h1 { margin: 0 0 4px; font-size: 24px; }
.login-sub { color: var(--text-dim); margin: 0 0 24px; font-size: 14px; }
.legal-notice { color: var(--text-dim); font-size: 12px; text-align: center; margin: 18px 0 0; }
.legal-notice a { color: var(--primary); text-decoration: underline; }
.login-card form { text-align: left; }
.login-card label { display: block; font-size: 13px; color: var(--text-dim); margin-bottom: 14px; }
.login-card input {
  width: 100%; margin-top: 6px; padding: 10px 12px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg-elevated); color: var(--text); font-size: 14px;
}
.divider { display: flex; align-items: center; gap: 10px; color: var(--text-dim); font-size: 12px; margin: 18px 0; }
.divider::before, .divider::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.form-error { background: rgba(249,112,102,.12); color: var(--red); padding: 8px 10px; border-radius: 8px; font-size: 13px; margin-bottom: 12px; }

/* --- Boutons --- */
.btn {
  border: none; border-radius: 8px; padding: 10px 16px; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: opacity .15s;
}
.btn:hover { opacity: .88; }
.btn-block { width: 100%; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-secondary { background: var(--bg-elevated); color: var(--text); border: 1px solid var(--border); }
.btn-danger { background: rgba(249,112,102,.15); color: var(--red); }
.btn-sm { padding: 6px 10px; font-size: 13px; }
.btn-link { background: none; border: none; color: var(--text-dim); cursor: pointer; font-size: 13px; }
.btn-link:hover { color: var(--text); }
.btn-icon { background: none; border: none; color: var(--text-dim); cursor: pointer; font-size: 15px; padding: 4px; }
.btn-icon:hover { color: var(--text); }

/* --- Layout --- */
.app { display: flex; min-height: 100vh; }
.sidebar {
  width: 230px; background: var(--bg-elevated); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; padding: 20px 0; position: sticky; top: 0; height: 100vh;
}
.sidebar-brand { font-weight: 700; font-size: 17px; padding: 0 20px 20px; }
.sidebar-nav { flex: 1; display: flex; flex-direction: column; gap: 2px; }
.sidebar-nav a { padding: 10px 20px; color: var(--text-dim); font-size: 14px; border-left: 3px solid transparent; }
.sidebar-nav a:hover { color: var(--text); background: rgba(255,255,255,.03); }
.sidebar-nav a.active { color: var(--primary); border-left-color: var(--primary); background: rgba(108,140,255,.08); font-weight: 600; }
.sidebar-footer { padding: 14px 20px 0; border-top: 1px solid var(--border); }
.me-row { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.me-name { font-size: 13px; color: var(--text-dim); }
.avatar { width: 28px; height: 28px; border-radius: 50%; background: var(--bg-elevated); border: 1px solid var(--border); object-fit: cover; flex-shrink: 0; }
.avatar-sm { width: 22px; height: 22px; border-radius: 50%; background: var(--bg-elevated); border: 1px solid var(--border); object-fit: cover; vertical-align: middle; margin-right: 8px; }

.main { flex: 1; min-width: 0; }
.view { padding: 28px 32px; max-width: 1200px; }

.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; flex-wrap: wrap; gap: 12px; }
.page-header h2 { margin: 0; font-size: 22px; }
.page-actions { display: flex; gap: 8px; }

/* --- Cards / stats --- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin-bottom: 26px; }
.stat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; }
.stat-card .label { color: var(--text-dim); font-size: 13px; margin-bottom: 6px; }
.stat-card .value { font-size: 24px; font-weight: 700; }
.stat-card .sub { font-size: 12px; color: var(--text-dim); margin-top: 4px; }
.stat-card.red .value { color: var(--red); }
.stat-card.orange .value { color: var(--orange); }
.stat-card.green .value { color: var(--green); }

.panel { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 20px; }
.panel h3 { margin: 0 0 14px; font-size: 15px; }

/* --- Table --- */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; font-size: 13.5px; border-bottom: 1px solid var(--border); }
th { color: var(--text-dim); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
tbody tr:hover { background: rgba(255,255,255,.02); cursor: pointer; }
.empty-state { text-align: center; color: var(--text-dim); padding: 40px 0; }

/* --- Badges --- */
.badge { display: inline-flex; align-items: center; gap: 5px; padding: 3px 10px; border-radius: 100px; font-size: 12px; font-weight: 600; }
.badge-a_payer { background: rgba(108,140,255,.15); color: var(--primary); }
.badge-partiellement_payee { background: rgba(247,185,85,.15); color: var(--orange); }
.badge-payee { background: rgba(62,194,127,.15); color: var(--green); }
.badge-en_retard { background: rgba(249,112,102,.15); color: var(--red); }
.badge-en_attente { background: rgba(154,164,178,.18); color: #c3cad4; }
.badge-annulee { background: rgba(154,164,178,.15); color: var(--text-dim); }
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }

/* --- Filtres --- */
.filters { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.filters select, .filters input { padding: 8px 10px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg-elevated); color: var(--text); font-size: 13.5px; }

.bulk-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: rgba(108,140,255,.1); border: 1px solid var(--primary); border-radius: 10px;
  padding: 10px 16px; margin-bottom: 14px; font-size: 13.5px;
}
th.sortable:hover { color: var(--text); }

.plan-progress { width: 100%; max-width: 260px; height: 5px; background: var(--bg-elevated); border-radius: 100px; margin-top: 4px; overflow: hidden; }
.plan-progress-bar { height: 100%; background: var(--green); border-radius: 100px; }

/* --- Modal --- */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.55); display: flex; align-items: flex-start; justify-content: center; padding: 40px 16px; overflow-y: auto; z-index: 100; }
.modal { background: var(--bg-card); border: 1px solid var(--border); border-radius: 14px; width: 100%; max-width: 640px; padding: 26px; }
.modal.wide { max-width: 820px; }
.modal-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 18px; gap: 12px; }
.modal-header h3 { margin: 0; font-size: 18px; }
.modal-close { background: none; border: none; color: var(--text-dim); font-size: 20px; cursor: pointer; }

/* --- Forms --- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-grid .full { grid-column: 1 / -1; }
.form-field label { display: block; font-size: 12.5px; color: var(--text-dim); margin-bottom: 5px; }
.form-field input, .form-field select, .form-field textarea {
  width: 100%; padding: 9px 11px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg-elevated); color: var(--text); font-size: 14px; font-family: inherit;
}
.form-field textarea { resize: vertical; min-height: 60px; }
.form-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

/* --- Facture detail --- */
.detail-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 18px; }
.detail-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 18px; gap: 12px; }
.detail-amount { font-size: 30px; font-weight: 700; }
.detail-meta { color: var(--text-dim); font-size: 13.5px; margin-top: 4px; }
.timeline-item { border-bottom: 1px solid var(--border); padding: 10px 0; font-size: 13.5px; }
.timeline-item:last-child { border-bottom: none; }
.timeline-item .meta { color: var(--text-dim); font-size: 12px; margin-top: 3px; }
.tag-pill { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 100px; font-size: 12px; background: var(--bg-elevated); border: 1px solid var(--border); }
.file-row { display: flex; align-items: center; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 13.5px; }
.file-row:last-child { border-bottom: none; }
.upload-drop { border: 1.5px dashed var(--border); border-radius: 10px; padding: 16px; text-align: center; color: var(--text-dim); font-size: 13px; cursor: pointer; }
.upload-drop:hover { border-color: var(--primary); color: var(--text); }

/* --- Toast --- */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--bg-elevated); border: 1px solid var(--border); color: var(--text);
  padding: 12px 20px; border-radius: 10px; font-size: 14px; z-index: 200; box-shadow: 0 8px 24px rgba(0,0,0,.4);
}
.toast.error { border-color: var(--red); color: var(--red); }
.toast.success { border-color: var(--green); color: var(--green); }

@media (max-width: 800px) {
  .app { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: static; flex-direction: row; overflow-x: auto; padding: 10px; }
  .sidebar-brand, .sidebar-footer { display: none; }
  .sidebar-nav { flex-direction: row; }
  .form-grid, .detail-grid { grid-template-columns: 1fr; }
  .view { padding: 18px; }
}