/* Auth Center - design tokens & shared components (v2.0) */
:root {
  color-scheme: light;
  --bg: #f4f7f6;
  --surface: #ffffff;
  --surface-2: #f8faf9;
  --surface-3: #eff4f2;
  --ink: #10201e;
  --ink-2: #3c504c;
  --muted: #6b7f7a;
  --line: #e2ebe8;
  --line-2: #cfdcd8;
  --primary: #0f766e;
  --primary-hover: #0b5d57;
  --primary-soft: #e6f4f1;
  --primary-line: #bfe4dc;
  --on-primary: #ffffff;
  --ok: #0b6b5d;
  --ok-bg: #e8f6f1;
  --ok-line: #bfe6d9;
  --err: #b42318;
  --err-bg: #fef3f2;
  --err-line: #fecdca;
  --warn: #a15c07;
  --warn-bg: #fffaeb;
  --warn-line: #fee4a8;
  --info: #445d58;
  --info-bg: #f1f6f4;
  --info-line: #dbe7e3;
  --shadow-sm: 0 1px 2px rgba(16, 32, 30, .05);
  --shadow-md: 0 24px 60px -30px rgba(11, 45, 40, .38), 0 2px 10px rgba(16, 32, 30, .04);
  --shadow-pop: 0 18px 40px -14px rgba(11, 45, 40, .28);
  --r-xs: 7px;
  --r-sm: 10px;
  --r: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --ease: cubic-bezier(.16, 1, .3, 1);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

/* Dark palette: explicit toggle wins, otherwise follow the OS. */
[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d1716;
  --surface: #142321;
  --surface-2: #192b28;
  --surface-3: #203632;
  --ink: #eaf2f0;
  --ink-2: #c5d5d1;
  --muted: #90a8a2;
  --line: #263a37;
  --line-2: #33504a;
  --primary: #5ad3bb;
  --primary-hover: #79e0cb;
  --primary-soft: #173c36;
  --primary-line: #2a6257;
  --on-primary: #06221d;
  --ok: #6fdcc0;
  --ok-bg: #143a32;
  --ok-line: #2b6a5b;
  --err: #ff9b90;
  --err-bg: #3a1e1c;
  --err-line: #6c302b;
  --warn: #f2c46b;
  --warn-bg: #3a2c14;
  --warn-line: #6a5123;
  --info: #b9d0ca;
  --info-bg: #1c302d;
  --info-line: #2f4d47;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
  --shadow-md: 0 24px 60px -30px rgba(0, 0, 0, .8), 0 2px 10px rgba(0, 0, 0, .25);
  --shadow-pop: 0 18px 40px -14px rgba(0, 0, 0, .7);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --bg: #0d1716; --surface: #142321; --surface-2: #192b28; --surface-3: #203632;
    --ink: #eaf2f0; --ink-2: #c5d5d1; --muted: #90a8a2;
    --line: #263a37; --line-2: #33504a;
    --primary: #5ad3bb; --primary-hover: #79e0cb; --primary-soft: #173c36;
    --primary-line: #2a6257; --on-primary: #06221d;
    --ok: #6fdcc0; --ok-bg: #143a32; --ok-line: #2b6a5b;
    --err: #ff9b90; --err-bg: #3a1e1c; --err-line: #6c302b;
    --warn: #f2c46b; --warn-bg: #3a2c14; --warn-line: #6a5123;
    --info: #b9d0ca; --info-bg: #1c302d; --info-line: #2f4d47;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
    --shadow-md: 0 24px 60px -30px rgba(0, 0, 0, .8), 0 2px 10px rgba(0, 0, 0, .25);
    --shadow-pop: 0 18px 40px -14px rgba(0, 0, 0, .7);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); font-size: 15px; line-height: 1.6;
  color: var(--ink); background: var(--bg); -webkit-font-smoothing: antialiased; }
h1, h2, h3, p, ul, ol { margin: 0; }
ul { padding: 0; list-style: none; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
svg { width: 20px; height: 20px; flex: none; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; border-radius: 4px; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 10px 18px; border-radius: var(--r-sm); border: 1px solid transparent;
  font-size: 14px; font-weight: 600; letter-spacing: .01em; cursor: pointer;
  transition: background .18s var(--ease), border-color .18s var(--ease), transform .12s var(--ease), box-shadow .18s var(--ease); }
.btn:active { transform: scale(.985); }
.btn-primary { background: var(--primary); color: var(--on-primary); box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--primary-hover); text-decoration: none; }
.btn-secondary { background: var(--surface); color: var(--ink); border-color: var(--line-2); }
.btn-secondary:hover { background: var(--surface-2); text-decoration: none; }
.btn-ghost { background: transparent; color: var(--ink-2); border-color: transparent; }
.btn-ghost:hover { background: var(--surface-3); text-decoration: none; }
.btn-danger { background: var(--err); color: #fff; }
.btn-danger:hover { filter: brightness(.93); text-decoration: none; }
.btn-sm { min-height: 34px; padding: 6px 12px; font-size: 13px; border-radius: var(--r-xs); }
.btn-block { width: 100%; }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

/* ---------- icon button / language switcher ---------- */
.icon-btn { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px;
  border: 1px solid var(--line); border-radius: var(--r-sm); background: var(--surface);
  color: var(--ink-2); cursor: pointer; transition: background .18s var(--ease), color .18s var(--ease); }
.icon-btn:hover { background: var(--surface-3); color: var(--ink); }
.icon-btn svg { width: 18px; height: 18px; }
.theme-toggle .ico-sun { display: none; }
[data-theme="dark"] .theme-toggle .ico-sun { display: block; }
[data-theme="dark"] .theme-toggle .ico-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .theme-toggle .ico-sun { display: block; }
  :root:not([data-theme]) .theme-toggle .ico-moon { display: none; }
}
.top-actions { display: flex; align-items: center; gap: 8px; }
.lang-menu { position: relative; }
.lang-menu > summary { list-style: none; display: flex; align-items: center; gap: 8px; height: 38px;
  padding: 0 11px; border: 1px solid var(--line); border-radius: var(--r-sm);
  background: var(--surface); color: var(--ink-2); font-size: 13px; cursor: pointer; user-select: none; }
.lang-menu > summary::-webkit-details-marker { display: none; }
.lang-menu > summary:hover { background: var(--surface-3); }
.lang-menu > summary svg { width: 16px; height: 16px; }
.lang-menu .ico-chevron { width: 13px; height: 13px; opacity: .7; }
.lang-menu[open] .ico-chevron { transform: rotate(180deg); }
.lang-pop { position: absolute; right: 0; top: calc(100% + 8px); z-index: 30; min-width: 172px;
  padding: 6px; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface);
  box-shadow: var(--shadow-pop); animation: pop-in .16s var(--ease); }
.lang-pop-title { padding: 6px 10px 4px; font-size: 11px; letter-spacing: .08em;
  text-transform: uppercase; color: var(--muted); }
.lang-pop a { display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 8px 10px; border-radius: var(--r-xs); font-size: 13px; color: var(--ink-2); }
.lang-pop a:hover { background: var(--surface-3); text-decoration: none; }
.lang-pop a.on { color: var(--primary); font-weight: 600; background: var(--primary-soft); }
.lang-pop .ico-check { width: 15px; height: 15px; }
@keyframes pop-in { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }

/* ---------- forms ---------- */
.field { margin-top: 16px; }
.field label { display: block; margin-bottom: 6px; font-size: 13px; font-weight: 600; color: var(--ink-2); }
.field input, .field select, .field textarea,
input[type="text"], input[type="email"], input[type="password"], input[type="date"], select, textarea {
  width: 100%; min-height: 44px; padding: 10px 13px; font-size: 16px; /* 16px avoids iOS zoom */
  border: 1px solid var(--line-2); border-radius: var(--r-sm); background: var(--surface);
  color: var(--ink); transition: border-color .16s var(--ease), box-shadow .16s var(--ease); }
textarea { min-height: 96px; resize: vertical; font-family: var(--mono); font-size: 13px; }
input::placeholder, textarea::placeholder { color: var(--muted); opacity: .8; }
.field input:focus, input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.hint { font-size: 12.5px; color: var(--muted); margin-top: 6px; line-height: 1.55; }
.field-err { font-size: 12.5px; color: var(--err); margin-top: 6px; }
.check { display: flex; align-items: flex-start; gap: 10px; margin-top: 18px;
  font-size: 13px; color: var(--ink-2); line-height: 1.55; cursor: pointer; }
.check input { appearance: none; -webkit-appearance: none; flex: none;
  width: 17px; height: 17px; margin: 2px 0 0; border: 1.5px solid var(--line-2);
  border-radius: 5px; background: var(--surface); cursor: pointer; }
.check input:checked { background: var(--primary); border-color: var(--primary); }
.check input:checked::after { content: ""; display: block; width: 4px; height: 8px;
  margin: 1px 0 0 4px; border: solid var(--on-primary); border-width: 0 2px 2px 0;
  transform: rotate(45deg); }
.check input:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.check a { font-weight: 600; }
.form-actions { margin-top: 22px; display: grid; gap: 10px; }
.auth-card .form-actions > .btn { width: 100%; }
.auth-card .stack-actions > .btn,
.auth-card .stack-actions form > .btn { width: 100%; }
.form-foot { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line);
  font-size: 13.5px; color: var(--muted); text-align: center; }
.form-foot a { font-weight: 600; margin-left: 5px; }
.form-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }

/* ---------- alerts ---------- */
.alert { display: flex; align-items: flex-start; gap: 10px; padding: 12px 14px; margin-bottom: 20px;
  border: 1px solid var(--info-line); border-radius: var(--r-sm); background: var(--info-bg);
  color: var(--info); font-size: 13.5px; line-height: 1.55; }
.alert .alert-ico { width: 18px; height: 18px; margin-top: 1px; }
.alert-ok { background: var(--ok-bg); border-color: var(--ok-line); color: var(--ok); }
.alert-err { background: var(--err-bg); border-color: var(--err-line); color: var(--err); }
.alert-warn { background: var(--warn-bg); border-color: var(--warn-line); color: var(--warn); }

/* ---------- badges / surfaces ---------- */
.badge { display: inline-flex; align-items: center; padding: 2px 9px; border-radius: 999px;
  font-size: 12px; font-weight: 600; line-height: 1.7; white-space: nowrap;
  background: var(--surface-3); color: var(--ink-2); }
.badge-ok { background: var(--ok-bg); color: var(--ok); }
.badge-err { background: var(--err-bg); color: var(--err); }
.badge-warn { background: var(--warn-bg); color: var(--warn); }
.badge-neutral { background: var(--surface-3); color: var(--muted); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 18px; }
.kicker { font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--primary); }
.muted { color: var(--muted); font-size: 12.5px; }
.divider { height: 1px; background: var(--line); border: 0; margin: 22px 0; }

/* ---------- data surfaces ---------- */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th { padding: 11px 14px; text-align: left; font-size: 12px; font-weight: 600; letter-spacing: .02em;
  color: var(--muted); background: var(--surface-2); border-bottom: 1px solid var(--line); white-space: nowrap; }
td { padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: middle; }
tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: var(--surface-2); }
td code, .code { font-family: var(--mono); font-size: 12px; }
.code { display: block; max-width: 100%; overflow-x: auto; margin: 10px 0; padding: 14px 16px;
  border-radius: var(--r-sm); background: #0f2421; color: #a9e8d5; white-space: pre; line-height: 1.65; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }
.stat-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 18px 20px; }
.stat-card .num { font-size: 28px; font-weight: 700; letter-spacing: -.03em; line-height: 1.2; }
.stat-card .lbl { margin-top: 4px; font-size: 12.5px; color: var(--muted); }
.pager { display: flex; align-items: center; gap: 10px; margin-top: 16px; font-size: 13px; color: var(--muted); }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 20px; }
.panel h2, .section-title { font-size: 15px; font-weight: 650; margin: 26px 0 10px; }
.panel h2:first-child, .section-title:first-child { margin-top: 0; }
.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 16px; }
.toolbar input[type="text"], .toolbar input[type="date"], .toolbar select { width: auto; min-width: 160px; min-height: 38px; font-size: 13.5px; }
.toolbar label { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink-2); white-space: nowrap; }
.inline-form { display: inline; }
.empty { padding: 36px 16px; text-align: center; color: var(--muted); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}