:root {
  color-scheme: light;
  --bg: #f7f9f8;
  --surface: #ffffff;
  --surface-soft: #f0f4f2;
  --ink: #1f2a27;
  --muted: #6c7874;
  --line: #dce4e0;
  --green: #347b64;
  --green-dark: #245c4a;
  --blue: #336fce;
  --blue-soft: #eaf1fc;
  --red: #ad4b47;
  --red-soft: #faeeee;
  --amber: #986b21;
  --amber-soft: #fbf3df;
  --shadow: 0 14px 44px rgba(36, 58, 50, 0.08);
  --radius: 18px;
  --font: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 132px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.55;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

a {
  color: var(--blue);
}

button,
a,
input,
select,
textarea {
  outline-offset: 3px;
}

:focus-visible {
  outline: 3px solid rgba(51, 111, 206, 0.35);
}

.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 100;
  border-radius: 8px;
  background: var(--ink);
  color: white;
  padding: 10px 14px;
}

.skip-link:focus {
  top: 12px;
}

.auth-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 0, rgba(77, 145, 115, 0.14), transparent 32rem),
    radial-gradient(circle at 90% 90%, rgba(51, 111, 206, 0.1), transparent 30rem),
    var(--bg);
}

.auth-shell {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
}

.auth-card {
  width: min(100%, 440px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
  padding: 42px;
}

.brand-mark {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  border-radius: 15px;
  background: var(--green);
  box-shadow: 0 8px 24px rgba(52, 123, 100, 0.22);
  color: white;
  font-family: ui-serif, Georgia, serif;
  font-size: 25px;
}

.brand-mark-small {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  font-size: 19px;
}

.eyebrow {
  margin: 24px 0 4px;
  color: var(--green);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.14em;
}

.auth-card h1 {
  margin: 0;
  font-size: clamp(28px, 6vw, 38px);
  letter-spacing: -0.035em;
}

.auth-copy {
  margin: 12px 0 24px;
  color: var(--muted);
}

.auth-note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.auth-form {
  display: grid;
  gap: 10px;
}

.auth-form input[name="code"] {
  margin-bottom: 8px;
  font-size: 24px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.28em;
  text-align: center;
}

.form-error:empty {
  display: none;
}

.form-error {
  border-radius: 10px;
  background: var(--red-soft);
  color: #7e302d;
  padding: 10px 12px;
  font-size: 13px;
}

.button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 11px;
  cursor: pointer;
  padding: 9px 15px;
  font-weight: 680;
  text-decoration: none;
  transition: background 120ms ease, border-color 120ms ease, transform 120ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
  transform: none;
}

.button-block {
  width: 100%;
}

.button-primary {
  background: var(--green);
  color: white;
}

.button-primary:hover {
  background: var(--green-dark);
}

.button-secondary {
  border-color: var(--line);
  background: white;
  color: var(--ink);
}

.button-secondary:hover,
.button-quiet:hover {
  border-color: #bdcac4;
  background: var(--surface-soft);
}

.button-danger {
  background: var(--red);
  color: white;
}

.button-quiet {
  border-color: transparent;
  background: transparent;
  color: var(--muted);
}

[hidden] { display: none !important; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; border-bottom: 1px solid var(--line); background: white; padding: 20px max(24px, calc((100vw - 1080px) / 2)); }
.brand { display: flex; gap: 12px; align-items: center; color: var(--ink); text-decoration: none; }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 18px; letter-spacing: -.025em; }
.brand small { color: var(--muted); font-size: 12px; }
.topbar-actions, .button-row, .panel-heading { display: flex; align-items: center; gap: 10px; }
.region-badge { border-radius: 100px; background: var(--surface-soft); color: var(--green-dark); font-size: 12px; padding: 6px 12px; }
.console-shell { width: min(100% - 48px, 1080px); margin: 0 auto; padding-bottom: 56px; }
.tab-nav { display: flex; gap: 28px; margin: 22px 0 18px; border-bottom: 1px solid var(--line); }
.tab-nav button { border: 0; border-bottom: 3px solid transparent; border-radius: 0; background: transparent; padding: 14px 2px 12px; font-weight: 650; color: var(--muted); cursor: pointer; }
.tab-nav button[aria-selected="true"] { border-bottom-color: var(--green); color: var(--green-dark); }
.tab-nav button:hover { color: var(--ink); }
.tab-panel { padding-top: 8px; }
.page-heading { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin: 18px 0 24px; }
.page-heading .eyebrow { margin: 0 0 5px; }
.page-heading h1 { margin: 0; font-size: 30px; letter-spacing: -.035em; }
.page-heading p:not(.eyebrow) { margin: 9px 0 0; color: var(--muted); }
.version-badge { flex-shrink: 0; border: 1px solid var(--line); border-radius: 100px; background: white; padding: 7px 12px; color: var(--muted); font-size: 12px; }
.panel { border: 1px solid var(--line); border-radius: var(--radius); background: white; padding: 28px; margin-bottom: 20px; box-shadow: 0 4px 16px rgba(36, 58, 50, .025); }
.panel-heading { justify-content: space-between; align-items: start; margin-bottom: 18px; }
h2 { margin: 0; font-size: 17px; letter-spacing: -.02em; }
h3 { margin: 0 0 10px; font-size: 15px; }
.provider-label { margin: 0 0 5px; color: var(--green-dark); font-size: 12px; font-weight: 650; }
.model-name { margin: 0; font-size: clamp(22px, 3vw, 30px); font-weight: 680; letter-spacing: -.035em; overflow-wrap: anywhere; }
.subtle { color: var(--muted); font-size: 13px; line-height: 1.6; }
.prompt-display { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; font: inherit; line-height: 1.8; max-height: 320px; overflow: auto; }
.editor-form { padding-top: 20px; margin-top: 20px; border-top: 1px solid var(--line); }
.field { display: grid; gap: 8px; margin-bottom: 20px; }
.field label { font-size: 13px; font-weight: 680; }
.field small { color: var(--muted); font-size: 12px; line-height: 1.6; }
input, select, textarea { width: 100%; border: 1px solid #cad5d0; border-radius: 10px; background: white; padding: 11px 12px; }
input:hover, select:hover, textarea:hover { border-color: #aebeb7; }
input:focus, select:focus, textarea:focus { border-color: var(--blue); }
textarea { resize: vertical; line-height: 1.6; }
.parameter-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 22px; margin-top: 22px; }
.price-fields { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 20px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 12px 0 26px; }
.contract-details summary, .history-card summary { cursor: pointer; color: var(--muted); font-size: 13px; font-weight: 600; }
.contract-details[open] summary { color: var(--ink); }
.contract-display, .history-detail { padding: 18px; border-radius: 10px; background: var(--surface-soft); white-space: pre-wrap; overflow-wrap: anywhere; font-size: 12px; line-height: 1.7; max-height: 560px; overflow: auto; }
.history-card .panel-heading { align-items: center; margin-bottom: 9px; }
.history-card h2 { overflow-wrap: anywhere; line-height: 1.5; }
.history-card .button { flex-shrink: 0; }
.history-meta { margin: 0 0 18px; }
.empty-state { margin: 32px 0; color: var(--muted); text-align: center; }
.page-note { color: var(--muted); margin: 24px 4px 0; font-size: 12px; }
.inline-notice { color: var(--muted); font-size: 12px; line-height: 1.6; min-height: 24px; }
.inline-notice.error { color: var(--red); }
.inline-notice.conflict { color: var(--amber); }
.readonly-notice { margin: 12px 0 18px; border: 1px solid #ead8b5; border-radius: 12px; background: var(--amber-soft); padding: 14px 18px; color: #7d5a24; font-size: 13px; }
.mfa-banner, .preview-banner { text-align: center; padding: 12px 24px; font-size: 12px; }
.mfa-banner { background: var(--amber-soft); color: var(--amber); }
.mfa-banner a { margin-left: 12px; }
.preview-banner { background: var(--blue-soft); color: #2d548b; }
.result-badge { border-radius: 100px; padding: 5px 10px; background: #edf6f0; color: var(--green-dark); font-size: 12px; }
.result-badge.error { background: var(--red-soft); color: var(--red); }
.learning-points { display: grid; gap: 12px; margin-top: 25px; }
.learning-point { border-top: 1px solid var(--line); padding-top: 18px; }
.learning-point p { white-space: pre-wrap; color: var(--muted); font-size: 13px; line-height: 1.8; }
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); z-index: 30; width: max-content; max-width: min(580px, calc(100vw - 32px)); padding: 12px 18px; border-radius: 12px; background: var(--ink); color: white; box-shadow: var(--shadow); font-size: 13px; }
.toast.error { background: #853c37; }
@media (max-width: 760px) {
  .topbar { gap: 10px; padding: 16px; flex-wrap: wrap; }
  .topbar-actions { gap: 4px; }
  .region-badge { display: none; }
  .console-shell { width: min(100% - 32px, 1080px); }
  .tab-nav { gap: 0; justify-content: space-between; }
  .tab-nav button { font-size: 13px; padding: 12px 4px; }
  .page-heading { display: block; margin: 16px 0 20px; }
  .page-heading h1 { font-size: 26px; }
  .version-badge { display: inline-block; margin-top: 14px; }
  .panel { padding: 20px; }
  .panel-heading { gap: 12px; }
  .parameter-grid { grid-template-columns: 1fr; }
  .price-fields { gap: 10px; }
  .history-card .panel-heading { display: block; }
  .history-card .button { margin-top: 12px; }
  .auth-card { padding: 30px 24px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}