/* 不二推理館 後台: base, shell, buttons, form controls and dialogs (docs/ADMIN_DESIGN.md §8).
   The first :root block repeats every token of public/assets/styles.css with the same value
   (test/static/tokens-sync.test.mjs); admin-only tokens follow them. System CJK fonts only: no
   third-party requests (the admin CSP allows 'self' only). Screen styles live in admin-views.css. */
:root {
  color-scheme: dark;
  --bg: #0c0a0b;
  --bg-2: #151113;
  --bg-3: #1f1a1c;
  --ink: #f4ede4;
  --ink-2: #c0b4ab;
  --ink-3: #8a7f79;
  --line: rgba(244, 237, 228, 0.1);
  --line-2: rgba(244, 237, 228, 0.2);
  --seal: #d8262c;
  --seal-2: #a9181f;
  --seal-soft: rgba(216, 38, 44, 0.16);
  --gold: #c8a46a;
  --font-display: 'Noto Serif TC', 'Songti TC', 'PMingLiU', 'Noto Serif CJK TC', serif;
  --font-body: 'Noto Sans TC', 'PingFang TC', 'Microsoft JhengHei', 'Noto Sans CJK TC', sans-serif;
  --font-mono: 'DM Mono', 'Noto Sans TC', ui-monospace, 'SF Mono', Menlo, monospace;
  --radius: 6px;
  --gutter-l: max(16px, env(safe-area-inset-left, 0px));
  --gutter-r: max(16px, env(safe-area-inset-right, 0px));
  --maxw: 1480px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --toolbar-h: 64px;
  /* admin only */
  --error: #ff7b7b;
  --error-soft: rgba(255, 123, 123, 0.12);
  --ok: #8fd19e;
  --ok-soft: rgba(143, 209, 158, 0.12);
  --warn: #e8c27a;
  --warn-soft: rgba(232, 194, 122, 0.12);
  --target: 44px;
  --savebar-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--gold); text-underline-offset: 3px; }
a:hover { color: var(--ink); }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.3; margin: 0; }
h1 { font-size: clamp(1.5rem, 4vw, 2rem); font-weight: 900; letter-spacing: 0.04em; }
h2 { font-size: 1.15rem; font-weight: 700; }
h3 { font-size: 1rem; font-weight: 700; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--seal); outline-offset: 3px; }
h1:focus, main:focus { outline: none; }
[hidden] { display: none !important; }

.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip {
  position: absolute; left: var(--gutter-l); top: -64px; z-index: 60;
  display: inline-flex; align-items: center; min-height: var(--target);
  padding: 0 16px; background: var(--seal); color: #fff; border-radius: var(--radius); text-decoration: none;
}
.skip:focus { top: 8px; color: #fff; }
.noscript { padding: 24px var(--gutter-l); color: var(--ink-2); }
.muted { color: var(--ink-2); }
.mono { font-family: var(--font-mono); }

/* ---------- Shell ---------- */
.app-header {
  position: sticky; top: 0; z-index: 30;
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px;
  padding: 8px var(--gutter-r) 8px var(--gutter-l);
  background: rgba(12, 10, 11, 0.94);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; min-height: var(--target); color: var(--ink); text-decoration: none; }
.brand img { width: 28px; height: 42px; object-fit: cover; border-radius: 2px; }
.brand span { font-family: var(--font-display); font-weight: 700; letter-spacing: 0.08em; }
.nav { display: flex; flex-wrap: wrap; gap: 4px; margin: 0; padding: 0; list-style: none; }
.nav a {
  display: inline-flex; align-items: center; min-height: var(--target); padding: 0 12px;
  border-radius: var(--radius); color: var(--ink-2); text-decoration: none;
}
.nav a:hover { color: var(--ink); background: var(--bg-3); }
.nav a[aria-current="page"] { color: var(--ink); background: var(--bg-3); box-shadow: inset 0 -2px 0 var(--seal); }
.header-user { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.header-user .who { color: var(--ink-2); font-size: 0.9rem; }
.app-main { display: block; width: 100%; max-width: var(--maxw); margin-inline: auto; padding: 24px var(--gutter-r) 48px var(--gutter-l); }
.view-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 20px; }
.view-head p { color: var(--ink-2); }
.page-narrow { max-width: 34rem; }
.panel { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.stack > * + * { margin-top: 16px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: var(--target); min-width: var(--target); padding: 0 16px;
  border: 1px solid var(--line-2); border-radius: var(--radius);
  background: var(--bg-3); color: var(--ink); cursor: pointer; text-decoration: none; white-space: nowrap;
  transition: background-color 0.15s, border-color 0.15s;
}
.btn:hover { border-color: var(--ink-3); color: var(--ink); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: 0.55; cursor: not-allowed; }
.btn--primary { background: var(--seal); border-color: var(--seal); color: #fff; font-weight: 700; }
.btn--primary:hover { background: var(--seal-2); border-color: var(--seal-2); color: #fff; }
.btn--ghost { background: transparent; border-color: transparent; color: var(--ink-2); }
.btn--ghost:hover { border-color: var(--line-2); }
.btn--danger { background: transparent; border-color: var(--error); color: var(--error); }
.btn--danger:hover { background: var(--error-soft); color: var(--error); border-color: var(--error); }
.btn--small { min-height: var(--target); padding: 0 12px; font-size: 0.9rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.link-btn {
  min-height: var(--target); padding: 0; border: 0; background: none; color: var(--gold);
  text-decoration: underline; text-underline-offset: 3px; cursor: pointer;
}

/* ---------- Form controls ---------- */
.field { display: flex; flex-direction: column; gap: 6px; }
.field + .field, .field + .field-row, .field-row + .field, .field-row + .field-row { margin-top: 16px; }
.field-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 16px; align-items: start; }
.field-row .field + .field { margin-top: 0; }
.label { font-weight: 700; color: var(--ink); }
.help { color: var(--ink-2); font-size: 0.875rem; }
.counter { color: var(--ink-2); font-size: 0.8rem; text-align: right; }
.counter.is-over { color: var(--error); }
.error-text { color: var(--error); font-size: 0.9rem; font-weight: 700; }
.input, .select, .textarea {
  width: 100%; min-height: var(--target); padding: 8px 12px;
  background: var(--bg-2); border: 1px solid var(--line-2); border-radius: var(--radius); color: var(--ink);
}
.textarea { min-height: 12rem; resize: vertical; line-height: 1.7; }
.input:hover, .select:hover, .textarea:hover { border-color: var(--ink-3); }
.input:focus-visible, .select:focus-visible, .textarea:focus-visible { outline: 2px solid var(--seal); outline-offset: 1px; border-color: var(--seal); }
[aria-invalid="true"] { border-color: var(--error) !important; background: var(--error-soft); }
.input[readonly] { background: transparent; color: var(--ink-2); }
.input--narrow { max-width: 8rem; }
.check { display: inline-flex; align-items: center; gap: 10px; min-height: var(--target); cursor: pointer; }
.check input { width: 22px; height: 22px; margin: 0; accent-color: var(--seal); flex: none; }
.check input:disabled { cursor: not-allowed; }
.password-wrap { display: flex; gap: 8px; }
.password-wrap .input { flex: 1; min-width: 0; }
fieldset { margin: 0; padding: 0; border: 0; min-width: 0; }
legend { padding: 0; }

/* ---------- Messages ---------- */
.alert { padding: 12px 16px; border-radius: var(--radius); border: 1px solid var(--line-2); background: var(--bg-2); }
.alert--error { border-color: var(--error); background: var(--error-soft); color: var(--ink); }
.alert--ok { border-color: var(--ok); background: var(--ok-soft); }
.alert--warn { border-color: var(--warn); background: var(--warn-soft); }
.alert:empty { display: none; }
.error-summary { padding: 16px; border: 2px solid var(--error); border-radius: var(--radius); background: var(--error-soft); }
.error-summary h2 { font-family: var(--font-body); font-size: 1rem; }
.error-summary ul { margin: 8px 0 0; padding-left: 1.2em; }
.error-summary a { color: var(--ink); font-weight: 700; display: inline-block; min-height: 32px; padding: 4px 0; }
.badge {
  display: inline-flex; align-items: center; padding: 1px 8px; border-radius: 999px; font-size: 0.78rem;
  border: 1px solid var(--line-2); color: var(--ink-2); white-space: nowrap;
}
.badge--warn { border-color: var(--warn); color: var(--warn); }
.badge--error { border-color: var(--error); color: var(--error); }
.badge--ok { border-color: var(--ok); color: var(--ok); }
.loading { color: var(--ink-2); padding: 24px 0; }

/* ---------- Dialogs ---------- */
.dialog {
  width: min(560px, calc(100% - 32px)); max-height: calc(100% - 32px); padding: 0;
  background: var(--bg-2); color: var(--ink); border: 1px solid var(--line-2); border-radius: var(--radius);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
}
.dialog--wide { width: min(880px, calc(100% - 32px)); }
.dialog::backdrop { background: rgba(0, 0, 0, 0.72); }
.dialog-inner { display: flex; flex-direction: column; gap: 16px; padding: 20px; }
.dialog-head h2 { font-size: 1.2rem; }
.dialog-actions { display: flex; flex-wrap: wrap-reverse; justify-content: flex-end; gap: 10px; padding-top: 4px; }
.temp-password {
  display: block; padding: 16px; border-radius: var(--radius); background: var(--bg); border: 1px dashed var(--gold);
  font-family: var(--font-mono); font-size: clamp(1.05rem, 4.5vw, 1.5rem); letter-spacing: 0.08em; text-align: center;
  word-break: break-all; user-select: all;
}

@media (max-width: 640px) {
  .app-header { position: static; gap: 4px 12px; }
  .header-user { margin-left: 0; width: 100%; justify-content: space-between; }
  .nav a { padding: 0 10px; }
  .app-main { padding-top: 16px; }
  .dialog-actions .btn { flex: 1 1 auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important; animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important; transition-delay: 0s !important; scroll-behavior: auto !important;
  }
}