:root {
  --bg: #f5f6fa;
  --card: #ffffff;
  --text: #1f2430;
  --muted: #7a8194;
  --border: #e6e8ef;
  --brand: #2f6df6;
  --brand-dark: #1f52c9;
  --ok: #178a52;
  --ok-bg: #e5f6ed;
  --pending: #a76b00;
  --pending-bg: #fdf2dc;
  --reject: #b3261e;
  --reject-bg: #fbe7e5;
  --unpaid: #5b6172;
  --unpaid-bg: #eef0f5;
  --warn: #d9480f;
  --warn-bg: #fff0e8;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 6px 20px rgba(16, 24, 40, .06);
}

* { 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);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

h1 { font-size: 1.5rem; margin: 0; }
h2 { font-size: 1.05rem; margin: 0 0 .75rem; }

.muted { color: var(--muted); }
.center { text-align: center; }
.right { text-align: right; }
.strong { font-weight: 600; }

/* ── Top bar ─────────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .75rem 1.25rem;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
  flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); }
.nav { display: flex; gap: .25rem; flex-wrap: wrap; flex: 1; }
.nav a {
  padding: .4rem .7rem;
  border-radius: 8px;
  color: var(--muted);
  font-weight: 500;
  font-size: .92rem;
}
.nav a:hover { background: var(--bg); color: var(--text); text-decoration: none; }
.user { display: flex; align-items: center; gap: .75rem; font-size: .9rem; }
.who { color: var(--muted); }
.logout { color: var(--reject); font-weight: 500; }

.badge {
  display: inline-block;
  background: var(--reject);
  color: #fff;
  border-radius: 999px;
  font-size: .72rem;
  padding: 0 .4rem;
  min-width: 1.1rem;
  text-align: center;
}

/* ── Layout ──────────────────────────────────────────────── */
.container { max-width: 960px; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }
.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}
.footer {
  text-align: center;
  color: var(--muted);
  font-size: .8rem;
  padding: 1.5rem;
}

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.stat { display: flex; flex-direction: column; gap: .15rem; }
.stat-label { color: var(--muted); font-size: .82rem; }
.stat-value { font-size: 1.7rem; font-weight: 700; }
.stat-sub { color: var(--muted); font-size: .85rem; }
.stat-warn { border-color: #f6c9b6; background: var(--warn-bg); }
.stat-warn .stat-value { color: var(--warn); }
.stat .btn { margin-top: .5rem; align-self: flex-start; }

/* ── Tables ──────────────────────────────────────────────── */
.table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.table th, .table td { padding: .6rem .5rem; text-align: left; border-bottom: 1px solid var(--border); }
.table th { color: var(--muted); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; }
.table tbody tr:last-child td { border-bottom: none; }
.table .right { text-align: right; }

.table-wide { display: block; overflow-x: auto; white-space: nowrap; }

/* ── Pills, tags, status ─────────────────────────────────── */
.pill {
  display: inline-block;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: .2rem .7rem;
  font-size: .82rem;
  color: var(--muted);
  font-weight: 500;
}
.pill-small { padding: .1rem .5rem; font-size: .74rem; }

.tag {
  display: inline-block;
  background: var(--bg);
  border-radius: 6px;
  padding: .1rem .5rem;
  font-size: .78rem;
  color: var(--muted);
}
.tag-blue { background: #e7effe; color: var(--brand-dark); }

.status {
  display: inline-block;
  border-radius: 6px;
  padding: .15rem .55rem;
  font-size: .78rem;
  font-weight: 600;
}
.status-ok { background: var(--ok-bg); color: var(--ok); }
.status-pending { background: var(--pending-bg); color: var(--pending); }
.status-reject { background: var(--reject-bg); color: var(--reject); }
.status-unpaid { background: var(--unpaid-bg); color: var(--unpaid); }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-block;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 10px;
  padding: .5rem 1rem;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}
.btn:hover { background: var(--bg); text-decoration: none; }
.btn-primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-danger { background: var(--reject-bg); border-color: #f1c7c4; color: var(--reject); }
.btn-danger:hover { background: #f6d9d7; }
.btn-small { padding: .3rem .75rem; font-size: .84rem; }
.btn-block { width: 100%; }

/* ── Batch approval ──────────────────────────────────────── */
.batch-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-bottom: .5rem; flex-wrap: wrap; }
.batch-total { font-size: 1.15rem; font-weight: 700; }
.actions { display: flex; gap: .6rem; margin-top: 1rem; }
.actions form { margin: 0; }

/* ── Month nav ───────────────────────────────────────────── */
.month-nav { display: flex; align-items: center; gap: .6rem; }

/* ── Login ───────────────────────────────────────────────── */
.login-wrap { display: flex; justify-content: center; padding-top: 3rem; }
.login-card { width: 100%; max-width: 380px; }
.login-card h1 { margin-bottom: .25rem; }
.login-form { display: flex; flex-direction: column; gap: 1rem; margin-top: 1.25rem; }
.login-form label { display: flex; flex-direction: column; gap: .35rem; font-size: .88rem; font-weight: 600; color: var(--muted); }
.login-form input, .login-form select {
  padding: .6rem .7rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
  background: var(--card);
  color: var(--text);
}

/* ── Settings ────────────────────────────────────────────── */
.settings-form { display: flex; flex-direction: column; gap: 1rem; align-items: flex-start; }
.toggle { display: flex; align-items: center; gap: .6rem; cursor: pointer; }
.toggle input { width: 1.1rem; height: 1.1rem; }

/* ── Alerts ──────────────────────────────────────────────── */
.alert { border-radius: 10px; padding: .7rem .9rem; font-size: .9rem; margin-bottom: 1rem; }
.alert-error { background: var(--reject-bg); color: var(--reject); }
code { background: var(--bg); border-radius: 4px; padding: .05rem .3rem; font-size: .85em; }

@media (max-width: 560px) {
  .container { padding: 1rem .8rem 2.5rem; }
  .stat-value { font-size: 1.4rem; }
  .user .who { display: none; }
}