/* ── Variables ────────────────────────────────────────────────── */
:root {
  --navy:        #1e3a5f;
  --navy-dark:   #152d4a;
  --navy-light:  #eff6ff;
  --hover-bg:    #dbeafe;
  --accent:      #1e40af;
  --body-bg:     #f8fafc;
  --surface:     #ffffff;
  --border:      #e2e8f0;
  --ink:         #0f172a;
  --muted:       #64748b;
  --danger:      #dc2626;
  --success-bg:  #dcfce7;
  --success-fg:  #166534;
  --error-bg:    #fef2f2;
  --error-fg:    #dc2626;
  --warning-bg:  #fffbeb;
  --warning-fg:  #92400e;
  --info-bg:     #eff6ff;
  --info-fg:     #1e40af;
}

/* ── Reset ────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  font-size: 14px;
  color: var(--ink);
  background: var(--body-bg);
}

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

/* ── Shell ────────────────────────────────────────────────────── */
.shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px 1fr;
}

/* ── Sidebar ──────────────────────────────────────────────────── */
.sidebar {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-dark) 100%);
  display: flex;
  flex-direction: column;
  padding: 20px 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 16px;
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.10);
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  flex-shrink: 0;
}

.brand strong { display: block; color: #fff; font-size: 12px; }
.brand .muted { color: rgba(255, 255, 255, 0.45); font-size: 10px; }

.nav { display: grid; gap: 2px; flex: 1; }

.nav a {
  display: block;
  padding: 8px 10px;
  border-radius: 6px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
}

.nav a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  text-decoration: none;
}

.nav a.active {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.10);
}

.sidebar-footer form { margin: 0; }

.sidebar-footer button {
  width: 100%;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.7);
  border-radius: 20px;
  padding: 8px 14px;
  font-size: 12px;
  cursor: pointer;
  font-family: inherit;
}

.sidebar-footer button:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

/* ── Content shell ────────────────────────────────────────────── */
.content {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.page-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 14px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.page-header h1 {
  margin: 0 0 2px;
  font-size: 1.25rem;
  color: var(--ink);
}

.page-header p { margin: 0; }

.content-body {
  padding: 20px;
  flex: 1;
}

/* ── Flash messages ───────────────────────────────────────────── */
.msg {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 13px;
  margin-bottom: 16px;
  border: 1px solid transparent;
}

.msg--success { background: var(--success-bg); color: var(--success-fg); border-color: #86efac; }
.msg--error   { background: var(--error-bg);   color: var(--error-fg);   border-color: #fecaca; }
.msg--warning { background: var(--warning-bg); color: var(--warning-fg); border-color: #fde68a; }
.msg--info    { background: var(--info-bg);    color: var(--info-fg);    border-color: #bfdbfe; }

/* ── Cards ────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 16px;
}

.stat-card { border-top: 3px solid var(--navy); }

.stat-card.stat-card--alert { border-top-color: var(--danger); }

.stat-card strong {
  display: block;
  font-size: 2rem;
  margin-top: 8px;
  color: var(--ink);
}

.stat-card--alert strong { color: var(--danger); }

/* ── Tables ───────────────────────────────────────────────────── */
table { width: 100%; border-collapse: collapse; }

th {
  padding: 8px 14px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--body-bg);
  border-bottom: 1px solid var(--border);
}

td {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--ink);
  border-bottom: 1px solid var(--border);
}

tbody tr:nth-child(odd) { background: var(--navy-light); }
tbody tr:hover { background: var(--hover-bg); }
tbody tr td a { color: var(--accent); font-weight: 500; }

/* ── Buttons ──────────────────────────────────────────────────── */
button,
.primary-button,
.secondary-button,
.danger-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: 9px 18px;
  border-radius: 20px;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
  text-decoration: none;
}

.primary-button,
button {
  background: var(--navy);
  color: #fff;
}

.primary-button:hover,
button:hover {
  background: var(--navy-dark);
  color: #fff;
  text-decoration: none;
}

.secondary-button {
  background: var(--body-bg);
  color: var(--navy);
  border: 1px solid var(--border);
}

.secondary-button:hover {
  background: var(--border);
  color: var(--navy);
  text-decoration: none;
}

.danger-button {
  background: var(--danger);
  color: #fff;
}

.danger-button:hover {
  background: #b91c1c;
  color: #fff;
  text-decoration: none;
}

button:focus-visible,
.primary-button:focus-visible,
.secondary-button:focus-visible,
.danger-button:focus-visible {
  outline: 2px solid var(--navy);
  outline-offset: 2px;
}

/* ── Forms ────────────────────────────────────────────────────── */
input,
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--body-bg);
  font-family: inherit;
  font-size: 13px;
  color: var(--ink);
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid rgba(30, 58, 95, 0.15);
  border-color: var(--navy);
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 4px;
}

/* ── Utility classes (preserved) ─────────────────────────────── */
.muted { color: var(--muted); }

.eyebrow {
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.grid { display: grid; gap: 16px; }
.two-up { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.detail-list { display: grid; gap: 12px; }
.detail-list div { display: grid; gap: 4px; }
.detail-list dt { color: var(--muted); font-size: 0.875rem; }
.detail-list dd { margin: 0; }

.stack-form { display: grid; gap: 16px; }
.form-row { display: grid; gap: 4px; }

.simple-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
}

/* ── Login page ───────────────────────────────────────────────── */
.login-shell {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
}

.login-brand {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-dark) 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px;
  text-align: center;
}

.login-brand-mark {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.login-brand h1 {
  color: #fff;
  font-size: 1.125rem;
  margin: 0 0 8px;
}

.login-brand p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8rem;
  margin: 0;
  line-height: 1.6;
}

.login-dots {
  display: flex;
  gap: 8px;
  margin-top: 28px;
}

.login-dots span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
}

.login-dots span.active { background: #fff; }

.login-form-panel {
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.login-form-inner {
  width: 100%;
  max-width: 320px;
}

.login-form-inner h2 {
  margin: 0 0 6px;
  font-size: 1.375rem;
  color: var(--ink);
}

.login-form-inner > p {
  color: var(--muted);
  font-size: 0.875rem;
  margin: 0 0 24px;
}

.login-error {
  background: var(--error-bg);
  border: 1px solid #fecaca;
  color: var(--error-fg);
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 13px;
  margin-bottom: 16px;
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { padding: 16px 14px; }
  .content { overflow: visible; }
}

@media (max-width: 640px) {
  .login-brand { display: none; }
  .login-shell { grid-template-columns: 1fr; }
}