:root {
  --surface-canvas: #f4f0e8;
  --surface-panel: #fffaf2;
  --surface-raised: #ffffff;
  --surface-letter: #fdf8ef;
  --surface-letter-input: #fffdf8;
  --surface-inverse: #111111;
  --surface-inverse-soft: #1a1815;
  --text-primary: #181713;
  --text-secondary: #656158;
  --text-tertiary: #8d8578;
  --text-inverse: #f8f3eb;
  --text-inverse-muted: #b9b0a3;
  --border-default: #ddd5c7;
  --border-strong: #b7aa98;
  --border-letter: #e6dccd;
  --border-inverse: rgba(248, 243, 235, 0.16);
  --accent-primary: #c96d2d;
  --accent-hover: #a9521d;
  --accent-soft: #f7dfc7;
  --status-success: #216e4e;
  --status-error: #b42318;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --brand-icon-size: 32px;
  --brand-icon-radius: 8px;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--surface-canvas);
}

body {
  min-height: 100dvh;
  margin: 0;
  background:
    linear-gradient(rgba(24, 23, 19, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(24, 23, 19, 0.028) 1px, transparent 1px),
    radial-gradient(1200px 480px at 80% -20%, rgba(201, 109, 45, 0.18), transparent 62%),
    var(--surface-canvas);
  background-size:
    32px 32px,
    32px 32px,
    auto,
    auto;
  color: var(--text-primary);
  font-family: -apple-system, "SF Pro Text", "PingFang SC", "Noto Sans SC", system-ui, sans-serif;
  text-wrap: pretty;
}

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

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 860px;
  margin-bottom: var(--space-4);
  font-size: 48px;
  font-weight: 720;
  line-height: 1.02;
}

h2 {
  margin-bottom: var(--space-2);
  font-size: 22px;
  font-weight: 680;
  line-height: 1.25;
}

h3 {
  margin-bottom: var(--space-3);
  font-size: 18px;
  line-height: 1.35;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-8);
  max-width: 1440px;
  margin: 0 auto;
  padding: var(--space-12) var(--space-12) var(--space-8);
}

.brand-block {
  display: grid;
  gap: var(--space-3);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand-icon {
  display: block;
  width: var(--brand-icon-size);
  height: var(--brand-icon-size);
  border-radius: var(--brand-icon-radius);
  flex-shrink: 0;
}

.eyebrow,
.step-label {
  margin: 0;
  color: var(--accent-primary);
  font-size: 12px;
  font-weight: 700;
}

.hero-copy {
  max-width: 620px;
  margin: 0;
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.55;
}

.nowrap {
  white-space: nowrap;
}

.topbar-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  gap: var(--space-2);
  min-width: 240px;
}

.topbar-meta span,
.usage-row span {
  border: 1px solid var(--border-default);
  border-radius: 999px;
  background: rgba(255, 250, 242, 0.7);
  padding: var(--space-2) var(--space-3);
  color: var(--text-secondary);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(360px, 440px) minmax(0, 1fr);
  gap: var(--space-6);
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--space-12) var(--space-8);
}

.auth-shell {
  display: grid;
  min-height: 100dvh;
  place-items: center;
  padding: var(--space-6);
}

.panel {
  border: 1px solid var(--border-default);
  border-radius: 28px;
  box-shadow: 0 18px 60px rgba(52, 39, 22, 0.12);
}

.panel {
  padding: var(--space-6);
}

.input-panel {
  background: rgba(255, 250, 242, 0.9);
  backdrop-filter: blur(18px);
}

.login-card {
  display: grid;
  width: min(100%, 420px);
  background: rgba(255, 250, 242, 0.94);
  padding: var(--space-8);
}

.login-brand {
  margin-bottom: var(--space-8);
}

.login-card h1 {
  margin-bottom: var(--space-3);
  font-size: 34px;
  line-height: 1.1;
}

.auth-copy {
  margin-bottom: var(--space-6);
  color: var(--text-secondary);
  line-height: 1.6;
}

.output-panel {
  border-color: rgba(17, 17, 17, 0.72);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), transparent 44%), var(--surface-inverse);
  color: var(--text-inverse);
}

.panel-heading {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.panel-heading p,
#result-status {
  margin-bottom: 0;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.5;
}

.output-panel .panel-heading p,
.output-panel .step-label {
  color: var(--text-inverse-muted);
}