:root {
  --bg: #e8edf5;
  --bg-accent: #dfe7f4;
  --surface: #ffffff;
  --card: #ffffff;
  --ink: #152033;
  --muted: #5c6b82;
  --line: #cfd8e6;
  --accent: #2f5fdb;
  --accent-soft: #e8effc;
  --ok: #1a7a4c;
  --ok-soft: #e6f6ee;
  --bad: #b42318;
  --bad-soft: #fdecea;
  --warn: #9a6700;
  --warn-soft: #fff6e0;
  --radius: 10px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(21, 32, 51, 0.04), 0 8px 24px rgba(21, 32, 51, 0.06);
  --font: "IBM Plex Sans", "Noto Sans TC", "Noto Sans SC", "Segoe UI", system-ui, sans-serif;
  font-family: var(--font);
}

* { box-sizing: border-box; }

body.admin {
  margin: 0;
  background:
    radial-gradient(1200px 480px at 10% -10%, var(--bg-accent), transparent 55%),
    var(--bg);
  color: var(--ink);
  line-height: 1.5;
  min-height: 100vh;
  font-size: 15px;
}

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

.admin-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}

.admin-brand a {
  color: var(--ink);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
}
.admin-brand a:hover { text-decoration: none; color: var(--accent); }
.admin-brand-mark {
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.95rem;
}
.admin-brand-sub {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.langs { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.langs a {
  margin: 0;
  font-size: 0.78rem;
  color: var(--muted);
  padding: 0.2rem 0.45rem;
  border-radius: 999px;
  border: 1px solid transparent;
}
.langs a.on {
  color: var(--ink);
  font-weight: 700;
  background: var(--accent-soft);
  border-color: #c5d4f5;
}

.admin-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1.25rem;
  background: rgba(255, 255, 255, 0.72);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(6px);
}
.admin-nav a {
  padding: 0.4rem 0.7rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-size: 0.84rem;
  font-weight: 500;
  text-decoration: none;
  min-height: 2.1rem;
  display: inline-flex;
  align-items: center;
}
.admin-nav a:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}
.admin-nav a.on,
.admin-nav a[aria-current="page"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
.admin-nav-home { margin-left: auto; }
.admin-logout { display: inline-flex; margin: 0; }
.admin-logout .btn { min-height: 2.1rem; }

main, .admin-wrap {
  padding: 1.25rem 1.25rem 2.75rem;
  max-width: 1120px;
  margin: 0 auto;
}

.admin-wrap h1 {
  margin: 0 0 0.85rem;
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.admin-wrap h2 {
  margin: 1.5rem 0 0.65rem;
  font-size: 1.1rem;
  font-weight: 650;
}

.note { color: var(--muted); font-size: 0.9rem; }
.note.demo { font-size: 0.82rem; opacity: 0.9; }

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}

.grid {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
}
.card.archived { opacity: 0.72; }
.card img { width: 100%; aspect-ratio: 1; object-fit: cover; background: #eef2f8; }
.card .body { padding: 0.75rem; }
.card h2 { font-size: 0.95rem; margin: 0 0 0.35rem; }
.meta { color: var(--muted); font-size: 0.8rem; }
.prices { font-weight: 700; }

.badge, .pill {
  display: inline-block;
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.3;
}
.badge.ok, .pill.ok { background: var(--ok-soft); color: var(--ok); }
.badge.bad, .pill.bad { background: var(--bad-soft); color: var(--bad); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.muted { background: #eef1f6; color: var(--muted); }

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
  align-items: end;
}

select, input, button, textarea {
  font: inherit;
  padding: 0.5rem 0.7rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}
select:focus, input:focus, textarea:focus, button:focus-visible {
  outline: 2px solid #9bb6f5;
  outline-offset: 1px;
}

button, .btn {
  background: var(--ink);
  color: #fff;
  border: none;
  cursor: pointer;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  min-height: 2.35rem;
}
button:hover, .btn:hover { filter: brightness(1.05); text-decoration: none; }
.btn-primary, button[type="submit"]:not(.btn-ghost):not(.btn-danger) {
  background: var(--accent);
  color: #fff;
}
.btn-ghost, button.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-danger, button.btn-danger {
  background: var(--bad);
  color: #fff;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}
table {
  width: 100%;
  border-collapse: collapse;
  background: transparent;
  border: none;
  border-radius: 0;
  min-width: 520px;
}
th, td {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  font-size: 0.9rem;
}
th {
  background: #f3f6fb;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-weight: 700;
}
tr:last-child td { border-bottom: none; }
.thumb {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  background: #eef2f8;
}

.form {
  display: grid;
  gap: 0.65rem;
  max-width: 520px;
  margin-bottom: 1.25rem;
}
.form label {
  display: grid;
  gap: 0.25rem;
  font-size: 0.84rem;
  color: var(--muted);
  font-weight: 500;
}
.form label:has(input[type="checkbox"]) {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--ink);
}
.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.25rem;
}
.panel .form { margin-bottom: 0; }

.flash {
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  font-size: 0.92rem;
  border: 1px solid transparent;
}
.flash-ok { background: var(--ok-soft); color: var(--ok); border-color: #b7e4c7; }
.flash-bad { background: var(--bad-soft); color: var(--bad); border-color: #f5c2c0; }

.empty {
  padding: 1.25rem 1rem;
  text-align: center;
  color: var(--muted);
  background: var(--surface);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  margin: 0.75rem 0 1.25rem;
}

.dash-identity {
  margin: 0 0 1rem;
  color: var(--muted);
}
.dash-identity strong { color: var(--ink); }
.dash-meta { margin: 0 0 1.25rem; font-size: 0.9rem; color: var(--muted); }
.dash-links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.75rem;
}
.dash-links a {
  display: block;
  padding: 1rem 1.05rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font-weight: 650;
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.dash-links a:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
  text-decoration: none;
}
.dash-links a span {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted);
}

/* Auth-centric login */
body.admin-auth .admin-top { border-bottom: none; background: transparent; }
body.admin-auth .admin-shell {
  min-height: calc(100vh - 3.5rem);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 1rem 3rem;
}
body.admin-auth .admin-wrap {
  width: 100%;
  max-width: 420px;
  margin: 0;
  padding: 0;
}
.login-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.5rem 1.4rem 1.35rem;
  box-shadow: var(--shadow);
}
.login-card .login-brand {
  margin: 0 0 0.25rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}
.login-card h1 {
  margin: 0 0 0.35rem;
  font-size: 1.45rem;
}
.login-card .login-sub {
  margin: 0 0 1.1rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.login-card .form { max-width: none; margin-bottom: 0.75rem; }
.login-card .form-actions { margin-top: 0.35rem; }
.login-card .form-actions .btn-primary,
.login-card .form-actions button[type="submit"] { width: 100%; }

.disclaimer {
  margin: 0.75rem 1rem;
  padding: 0.65rem 0.85rem;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  color: var(--muted);
  font-size: 0.88rem;
}

.list-plain {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}
.list-plain li {
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  margin-bottom: 0.45rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  justify-content: space-between;
}

.inline-form {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  align-items: center;
}

.balance-hero {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.65rem 1rem;
  padding: 1.1rem 1.2rem;
  margin-bottom: 1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.balance-hero.is-neg { border-color: #f0b4b0; background: #fff8f7; }
.balance-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.balance-value {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.num { font-variant-numeric: tabular-nums; }

.password-reveal {
  border-color: #c5d4f5;
  background: var(--accent-soft);
  margin-bottom: 1rem;
}
.password-reveal-title {
  margin: 0 0 0.35rem;
  font-weight: 700;
}
.password-reveal-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.65rem;
}
.password-reveal-input {
  flex: 1 1 12rem;
  min-width: 10rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.contact-edit {
  display: grid;
  gap: 0.5rem;
}
.contact-edit .form { margin-bottom: 0; max-width: none; }

code {
  font-size: 0.88em;
  background: #eef2f8;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
}

.tabs { display: none; }
.top { display: none; }

@media (prefers-reduced-motion: reduce) {
  .dash-links a { transition: none; }
}

@media (max-width: 420px) {
  .admin-top { padding: 0.75rem 0.9rem; }
  .admin-nav { padding: 0.6rem 0.9rem; }
  .admin-nav-home { margin-left: 0; }
  main, .admin-wrap { padding: 1rem 0.9rem 2.5rem; }
  .admin-wrap h1 { font-size: 1.35rem; }
}

.bill-type-badge { font-weight: 600; }
.bill-compose .bill-lines { display: grid; gap: 1rem; margin: 1rem 0; }
.bill-line-row {
  display: grid;
  gap: 0.65rem;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.bill-grand-total { font-size: 1.1rem; margin: 0.75rem 0 1rem; }
.bill-cta { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.75rem 0 1rem; }
.cash-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}
.cash-stat {
  padding: 0.65rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  min-width: 8rem;
}
.cash-stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.2rem;
}