:root {
  --bg: #fbf6ef;
  --surface: #fffdf9;
  --surface-2: #f4ecdf;
  --ink: #4a4238;
  --ink-soft: #8a7f6f;
  --accent: #e69a4e;
  --accent-deep: #c97f32;
  --danger: #c8605a;
  --line: #eadfce;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 8px 24px rgba(90, 68, 40, 0.08);
  --focus: 3px solid rgba(230, 154, 78, 0.7);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 10%, #fff4e2 0, transparent 45%),
    var(--bg);
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
  padding: 28px;
}

.auth-card__head {
  text-align: center;
  margin-bottom: 20px;
}

.auth-card__mascot {
  font-size: 44px;
  line-height: 1;
}

.auth-card h1 {
  margin: 8px 0 4px;
  font-size: 24px;
}

.auth-card__subtitle {
  margin: 0;
  color: var(--ink-soft);
}

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  background: var(--surface-2);
  border-radius: 12px;
  padding: 4px;
  margin-bottom: 16px;
}

.tab {
  border: 0;
  background: transparent;
  border-radius: 9px;
  padding: 9px;
  color: var(--ink-soft);
  cursor: pointer;
  font: inherit;
  font-weight: 600;
}

.tab.is-active {
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 1px 4px rgba(90, 68, 40, 0.12);
}

.auth-form {
  display: grid;
  gap: 14px;
}

.field {
  display: grid;
  gap: 6px;
}

.field label {
  font-size: 14px;
  font-weight: 600;
}

.field small {
  color: var(--ink-soft);
}

.field input {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 11px 12px;
  font: inherit;
  color: var(--ink);
}

.field input:focus-visible {
  outline: var(--focus);
  outline-offset: 2px;
}

.auth-message {
  min-height: 20px;
  font-size: 14px;
  margin-bottom: 12px;
}

.auth-message.is-error {
  color: var(--danger);
}

.auth-message.is-info {
  color: var(--ink-soft);
}

.btn {
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 11px 16px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.btn:focus-visible {
  outline: var(--focus);
  outline-offset: 2px;
}

.btn--block {
  width: 100%;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--accent-deep);
}

.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn--ghost:hover {
  background: var(--surface-2);
}

.btn--sm {
  padding: 6px 10px;
  font-size: 13px;
}