:root {
  --bg: #f4f6fa;
  --panel: #ffffff;
  --border: #e5e9f0;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --danger: #ef4444;
  --radius: 10px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { text-decoration: none; color: inherit; }

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

.sidebar {
  width: 230px;
  background: #14172b;
  color: #cbd5e1;
  display: flex;
  flex-direction: column;
  padding: 18px 12px;
  flex-shrink: 0;
}
.brand { font-size: 20px; font-weight: 700; color: #fff; padding: 8px 10px 20px; }
.brand span { color: #818cf8; }
.sidebar nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.navlink { padding: 9px 10px; border-radius: 8px; font-size: 14px; color: #cbd5e1; }
.navlink:hover { background: #1f2340; color: #fff; }
.navlink.active { background: var(--primary); color: #fff; }
.sidebar-footer { border-top: 1px solid #262a45; padding-top: 12px; margin-top: 10px; font-size: 13px; }
.notif-link { display: block; padding: 8px 10px; position: relative; }
.dot { background: var(--danger); color: #fff; border-radius: 20px; font-size: 11px; padding: 1px 6px; margin-left: 6px; }
.me { padding: 8px 10px; color: #fff; }
.me small { color: #94a3b8; }
.logout { display: block; padding: 8px 10px; color: #f87171; }

.content { flex: 1; padding: 28px 34px; max-width: 1400px; }

h1 { font-size: 24px; margin: 0 0 4px; }
h2 { font-size: 18px; }
.subtitle { color: var(--muted); margin: 0 0 24px; }

.page-head { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 20px; flex-wrap: wrap; gap: 10px; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; margin-bottom: 28px; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px;
}
.card .num { font-size: 30px; font-weight: 700; }
.card .label { color: var(--muted); font-size: 13px; margin-top: 4px; }
.card.alert .num { color: var(--danger); }

.panel {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 22px; margin-bottom: 24px;
}

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
tr:hover td { background: #fafbfe; }

.badge { padding: 2px 10px; border-radius: 20px; font-size: 12px; font-weight: 600; display: inline-block; }

.btn {
  display: inline-block; background: var(--primary); color: #fff !important; border: none;
  padding: 9px 16px; border-radius: 8px; font-size: 14px; cursor: pointer; font-weight: 600;
}
.btn:hover { background: var(--primary-dark); }
.btn.secondary { background: #fff; color: var(--text) !important; border: 1px solid var(--border); }
.btn.danger { background: var(--danger); }
.btn.small { padding: 5px 11px; font-size: 12.5px; }

form.inline { display: inline; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-grid.full { grid-template-columns: 1fr; }
.field { display: flex; flex-direction: column; gap: 5px; margin-bottom: 14px; }
.field label { font-size: 13px; font-weight: 600; color: #374151; }
input, select, textarea {
  padding: 9px 11px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px;
  font-family: inherit; background: #fff;
}
textarea { resize: vertical; min-height: 70px; }

.tag-link { color: var(--primary); font-weight: 600; }

.empty { color: var(--muted); padding: 30px 0; text-align: center; }

.login-wrap { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: linear-gradient(135deg,#4f46e5,#818cf8); }
.login-card { background: #fff; padding: 40px; border-radius: 16px; width: 340px; box-shadow: 0 20px 60px rgba(0,0,0,.25); }
.login-card h1 { text-align: center; }
.login-card .subtitle { text-align: center; }
.error-msg { background: #fee2e2; color: #b91c1c; padding: 10px 14px; border-radius: 8px; font-size: 13px; margin-bottom: 14px; }

.timeline { border-left: 2px solid var(--border); margin-left: 8px; padding-left: 20px; }
.timeline-item { position: relative; padding-bottom: 20px; }
.timeline-item::before { content: ''; position: absolute; left: -25px; top: 4px; width: 10px; height: 10px; border-radius: 50%; background: var(--primary); }
.timeline-item .meta { color: var(--muted); font-size: 12.5px; }

.entity-links { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0 20px; }
.entity-links a { background: #eef2ff; color: var(--primary); padding: 5px 12px; border-radius: 20px; font-size: 13px; font-weight: 600; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 18px; }
.tabs a { padding: 9px 16px; font-size: 14px; color: var(--muted); border-bottom: 2px solid transparent; }
.tabs a.active { color: var(--primary); border-color: var(--primary); font-weight: 600; }

.progress-bar { background: #e5e9f0; border-radius: 20px; height: 8px; overflow: hidden; width: 100%; }
.progress-bar .fill { background: var(--primary); height: 100%; }

.overdue { color: var(--danger); font-weight: 600; }

/* ---------- Mobile responsiveness ---------- */
@media (max-width: 780px) {
  .app-shell { flex-direction: column; }
  .sidebar {
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    padding: 10px 12px;
    gap: 6px;
  }
  .sidebar .brand { padding: 4px 6px; font-size: 16px; flex: 1 0 100%; }
  .sidebar form { flex: 1 0 100%; padding: 0 0 6px; }
  .sidebar nav {
    flex-direction: row;
    flex-wrap: nowrap;
    overflow-x: auto;
    flex: 1 0 100%;
    -webkit-overflow-scrolling: touch;
    gap: 4px;
  }
  .sidebar nav .navlink { white-space: nowrap; font-size: 13px; padding: 8px; }
  .sidebar-footer { flex: 1 0 100%; border-top: none; display: flex; justify-content: space-between; align-items: center; padding-top: 6px; }
  .content { padding: 16px; }
  .cards { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; }
  .form-grid { grid-template-columns: 1fr; }
  table { font-size: 13px; }
  th, td { padding: 8px 6px; }
  .page-head { flex-direction: column; align-items: flex-start; }
}