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

:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --border: #e5e7eb;
  --text: #111827;
  --muted: #6b7280;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --green: #16a34a;
  --red: #dc2626;
  --amber: #d97706;
  --radius: 12px;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Header ---------- */
.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 20px 16px;
  text-align: center;
}
.topbar h1 { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.02em; }
.clock {
  font-size: 2.6rem; font-weight: 700; letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums; margin-top: 6px; color: var(--accent);
}
.today { color: var(--muted); font-size: 0.85rem; margin-top: 2px; text-transform: capitalize; }

.topnav { margin-top: 12px; display: flex; justify-content: center; gap: 20px; font-size: 0.85rem; }
.topnav a, .linklike {
  color: var(--accent); text-decoration: none; font-weight: 500;
  background: none; border: 0; font: inherit; cursor: pointer;
}
.topnav a:hover, .linklike:hover { text-decoration: underline; }

/* ---------- Layout ---------- */
main {
  max-width: 640px;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}
.card h2 { font-size: 0.95rem; font-weight: 700; margin-bottom: 12px; letter-spacing: -0.01em; }
.card h3 { font-size: 0.85rem; font-weight: 600; margin: 18px 0 10px; color: var(--muted); }

.row { display: flex; gap: 8px; align-items: center; }
.row.spread { justify-content: space-between; margin-bottom: 12px; }
.hidden { display: none !important; }
.stack { display: flex; flex-direction: column; gap: 8px; }

.field span { display: block; font-size: 0.8rem; font-weight: 600; color: var(--muted); margin-bottom: 6px; }

/* ---------- Inputs ---------- */
select, input {
  flex: 1;
  min-width: 0;
  padding: 11px 12px;
  font-size: 0.95rem;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
select:focus, input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}
input[type="date"], input[type="month"], input[type="datetime-local"] { flex: 0 0 auto; }

/* ---------- Buttons ---------- */
.btn {
  border: 0;
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.05s, opacity 0.15s;
}
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }

.btn-ghost {
  background: var(--card); color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: #cbd5e1; }

.btn.full { width: 100%; }

.actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }
.btn-in {
  background: var(--green); color: #fff;
  font-size: 1.05rem; font-weight: 700; padding: 20px; letter-spacing: 0.02em;
}
.btn-in:hover:not(:disabled) { background: #15803d; }
.btn-out {
  background: #1f2937; color: #fff;
  font-size: 1.05rem; font-weight: 700; padding: 20px; letter-spacing: 0.02em;
}
.btn-out:hover:not(:disabled) { background: #111827; }

.message { min-height: 1.3em; margin-top: 12px; font-size: 0.88rem; text-align: center; }
.message.ok { color: var(--green); }
.message.err { color: var(--red); }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { padding: 10px 8px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: #f9fafb; }
td.act { text-align: right; }

.empty { color: var(--muted); text-align: center; padding: 16px 0 4px; font-size: 0.88rem; }

/* ---------- Badges ---------- */
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  font-size: 0.75rem; font-weight: 600;
}
.badge.in, .badge.approved { background: #dcfce7; color: #15803d; }
.badge.out, .badge.rejected { background: #fee2e2; color: #b91c1c; }
.badge.pending { background: #fef3c7; color: #b45309; }

/* ---------- Small action buttons (text, không icon) ---------- */
.mini {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--card);
  color: var(--text);
  margin-left: 4px;
}
.mini:hover { border-color: #cbd5e1; background: #f9fafb; }
.mini.ok { color: var(--green); border-color: #bbf7d0; }
.mini.ok:hover { background: #f0fdf4; }
.mini.warn { color: var(--amber); border-color: #fde68a; }
.mini.warn:hover { background: #fffbeb; }
.mini.danger { color: var(--red); border-color: #fecaca; }
.mini.danger:hover { background: #fef2f2; }

.nbadge {
  display: inline-block; min-width: 18px; padding: 1px 6px;
  background: var(--red); color: #fff; border-radius: 999px;
  font-size: 0.72rem; font-weight: 700; vertical-align: 1px;
}

/* ---------- Tabs ---------- */
.tabs { display: flex; gap: 6px; margin-bottom: 14px; flex-wrap: wrap; }
.tab {
  flex: 1; min-width: 76px;
  padding: 9px 8px; border-radius: 8px;
  background: var(--card); border: 1px solid var(--border);
  color: var(--muted); font-weight: 600; font-size: 0.88rem; cursor: pointer;
}
.tab:hover { color: var(--text); }
.tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ---------- Admin ---------- */
.login-card { max-width: 340px; margin: 48px auto; }
.login-card h2 { text-align: center; margin-bottom: 14px; }

.grid-form { display: grid; gap: 8px; grid-template-columns: 1fr; }
@media (min-width: 560px) {
  .grid-form { grid-template-columns: 1fr 1fr 120px auto; }
}

.stack { max-width: none; }
#tab-account .stack { max-width: 300px; }

#tab-records .row, #tab-employees .row { margin-bottom: 12px; flex-wrap: wrap; }
#tab-employees .row input { flex: 1 1 140px; }

.hello { font-size: 0.95rem; margin-bottom: 2px; }
.hello .linklike { color: var(--muted); }
.hello .linklike:hover { color: var(--red); }

.hint { color: var(--muted); font-size: 0.78rem; text-align: center; }
.daytotal { text-align: right; font-size: 0.88rem; font-weight: 700; padding-top: 10px; }

.pwform { margin-top: 10px; }
.sep { color: var(--muted); margin: 0 4px; }

.grid-forgot { display: grid; gap: 8px; grid-template-columns: 1fr 1fr; margin-bottom: 14px; }
.grid-forgot input[type="text"], .grid-forgot button { grid-column: 1 / -1; }
@media (min-width: 560px) {
  .grid-forgot { grid-template-columns: 150px 115px 105px 1fr auto; }
  .grid-forgot input[type="text"], .grid-forgot button { grid-column: auto; }
}
.phone { color: var(--muted); font-size: 0.8rem; font-weight: 400; }

#dataViews { display: contents; }

footer { text-align: center; color: var(--muted); font-size: 0.75rem; padding: 24px; }
footer a { color: var(--accent); text-decoration: none; font-weight: 500; }
footer a:hover { text-decoration: underline; }

@media (min-width: 720px) {
  .topbar h1 { font-size: 1.4rem; }
  .clock { font-size: 3rem; }
  main { padding: 24px 16px; }
}