/* =====================================================================
   main.css — Design System (Dark mode mặc định)
   Hệ thống KSK Lâm Đồng
   ===================================================================== */

:root {
  /* Màu thương hiệu */
  --primary:        #1e40af;
  --primary-600:    #2563eb;
  --primary-400:    #60a5fa;
  --secondary:      #059669;
  --warning:        #d97706;
  --danger:         #dc2626;

  /* Nền & bề mặt (dark) */
  --bg:             #0f172a;
  --bg-2:           #0b1220;
  --surface:        #1e293b;
  --surface-2:      #243049;
  --border:         rgba(148, 163, 184, 0.18);

  /* Chữ */
  --text:           #f1f5f9;
  --text-muted:     #94a3b8;

  /* Tiến độ */
  --good:           #22c55e;
  --warn:           #f59e0b;
  --low:            #ef4444;

  --radius:         14px;
  --radius-sm:      10px;
  --shadow:         0 8px 30px rgba(0, 0, 0, 0.35);
  --gap:            16px;
  --font:           'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(37, 99, 235, 0.18), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(5, 150, 105, 0.12), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary-400); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { margin: 0 0 .5em; font-weight: 700; line-height: 1.25; }
.muted { color: var(--text-muted); }

/* ----------------------- Layout helpers ----------------------- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.grid { display: grid; gap: var(--gap); }
.flex { display: flex; gap: var(--gap); }
.between { justify-content: space-between; align-items: center; }
.wrap { flex-wrap: wrap; }

/* ----------------------- Glass card ----------------------- */
.glass, .card {
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.85), rgba(30, 41, 59, 0.65));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}
.card { padding: 20px; }

/* ----------------------- Buttons ----------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--surface-2); color: var(--text);
  font-family: inherit; font-size: 14px; font-weight: 600; cursor: pointer;
  transition: transform .12s ease, filter .12s ease, background .12s ease;
}
.btn:hover { filter: brightness(1.1); transform: translateY(-1px); text-decoration: none; }
.btn:active { transform: translateY(0); }
.btn-primary { background: linear-gradient(135deg, var(--primary-600), var(--primary)); border-color: transparent; }
.btn-success { background: var(--secondary); border-color: transparent; }
.btn-ghost   { background: transparent; }
.btn-block   { width: 100%; }
.btn-sm      { padding: 6px 12px; font-size: 13px; }

/* ----------------------- Forms ----------------------- */
.form { display: grid; gap: 16px; }
.field { display: grid; gap: 6px; }
.field > span { font-size: 13px; font-weight: 500; color: var(--text-muted); }
input, select, textarea {
  width: 100%; padding: 11px 13px;
  background: var(--bg-2); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-family: inherit; font-size: 15px; outline: none;
  transition: border-color .12s ease, box-shadow .12s ease;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary-400);
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.18);
}

/* ----------------------- Alerts ----------------------- */
.alert { padding: 12px 14px; border-radius: var(--radius-sm); margin-bottom: 16px; font-size: 14px; }
.alert-danger  { background: rgba(220, 38, 38, 0.14); border: 1px solid rgba(220, 38, 38, 0.4); color: #fecaca; }
.alert-success { background: rgba(5, 150, 105, 0.14); border: 1px solid rgba(5, 150, 105, 0.4); color: #bbf7d0; }

/* ----------------------- Badges & progress ----------------------- */
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge.good { background: rgba(34, 197, 94, 0.18);  color: #86efac; }
.badge.warn { background: rgba(245, 158, 11, 0.18); color: #fcd34d; }
.badge.low  { background: rgba(239, 68, 68, 0.18);  color: #fca5a5; }

.progress { height: 9px; border-radius: 999px; background: rgba(148, 163, 184, 0.18); overflow: hidden; }
.progress > span { display: block; height: 100%; border-radius: 999px; transition: width .6s ease; }
.progress > span.good { background: linear-gradient(90deg, #16a34a, var(--good)); }
.progress > span.warn { background: linear-gradient(90deg, #d97706, var(--warn)); }
.progress > span.low  { background: linear-gradient(90deg, #b91c1c, var(--low)); }

/* ----------------------- Tables ----------------------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius); }
table.data { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data th, table.data td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--border); }
table.data th { color: var(--text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
table.data tbody tr:hover { background: rgba(148, 163, 184, 0.06); }
table.data td.num, table.data th.num { text-align: right; font-variant-numeric: tabular-nums; }

/* ----------------------- KPI cards ----------------------- */
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); }
.kpi { padding: 18px 20px; }
.kpi .kpi-label { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--text-muted); }
.kpi .kpi-value { font-size: 28px; font-weight: 700; margin-top: 6px; }
.kpi .kpi-sub   { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

/* ----------------------- Auth page ----------------------- */
.auth-page { display: grid; place-items: center; padding: 24px; }
.auth-card { width: 100%; max-width: 400px; padding: 32px; }
.auth-head { text-align: center; margin-bottom: 24px; }
.auth-logo { font-size: 44px; }
.auth-head h1 { font-size: 22px; margin: 8px 0 2px; }
.auth-foot { text-align: center; margin: 18px 0 0; font-size: 13px; }

/* ----------------------- Topbar ----------------------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: linear-gradient(135deg, rgba(30, 64, 175, 0.9), rgba(15, 23, 42, 0.9));
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}
.topbar .container { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.topbar .brand { font-weight: 700; font-size: 17px; display: flex; align-items: center; gap: 10px; }
.topbar nav { display: flex; gap: 6px; align-items: center; }
.topbar nav a { padding: 8px 12px; border-radius: 8px; color: var(--text); font-size: 14px; }
.topbar nav a:hover, .topbar nav a.active { background: rgba(255, 255, 255, 0.12); text-decoration: none; }

section { margin: 24px 0; }

/* ----------------------- Bottom nav (mobile) ----------------------- */
.bottom-nav { display: none; }
.bottom-nav a {
  flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 8px 4px; color: var(--text-muted); font-size: 11px; text-decoration: none;
}
.bottom-nav a span { font-size: 19px; }
.bottom-nav a:active { color: var(--primary-400); }

/* ----------------------- Responsive ----------------------- */
@media (max-width: 900px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  body { font-size: 14px; }
  .kpi-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .kpi .kpi-value { font-size: 22px; }
  .topbar nav a span.label { display: none; }
  .container { padding: 0 14px; }
  table.data th, table.data td { padding: 9px 10px; }

  /* Hiện thanh điều hướng dưới đáy */
  .bottom-nav {
    display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 80;
    background: rgba(15, 23, 42, 0.96); border-top: 1px solid var(--border);
    backdrop-filter: blur(10px); padding-bottom: env(safe-area-inset-bottom, 0);
  }
  /* Thu gọn menu trên cùng (đã có bottom-nav) trừ đăng xuất */
  .topbar nav { gap: 2px; }
}