:root {
  --background: #f5f7fb;
  --foreground: #111318;
  --card: #fff;
  --muted-foreground: #667085;
  --border: #d7dde6;
  --border-strong: #bac2cf;
  --primary: #356dff;
  --warning: #f59e0b;
  --font-sans: "PingFang SC", "SF Pro Display", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
}

html.dark {
  --background: #080b10;
  --foreground: #f5f7fb;
  --card: #0d1218;
  --muted-foreground: #8a94a6;
  --border: #232c39;
  --border-strong: #344152;
  --primary: #7aa2ff;
  --warning: #ffb020;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background) repeating-linear-gradient(
    45deg,
    transparent,
    transparent 8px,
    color-mix(in srgb, var(--border) 46%, transparent) 8px,
    color-mix(in srgb, var(--border) 46%, transparent) 9px
  );
  color: var(--foreground);
  font-family: var(--font-sans);
}

.login-shell {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 16px;
}

.login-card {
  display: grid;
  gap: 14px;
  width: min(360px, 100%);
  padding: 24px;
  background: var(--card);
  border: 1px dashed var(--border);
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, #fff 12%, transparent);
}

.brand-copy {
  display: grid;
  min-width: 0;
  gap: 3px;
}

.brand-copy strong {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.brand-copy em {
  color: var(--muted-foreground);
  font: normal 11px var(--font-mono);
  letter-spacing: 0.14em;
}

.field {
  display: grid;
  gap: 5px;
}

.field-label {
  color: var(--muted-foreground);
  font: 12px var(--font-mono);
  letter-spacing: 0.06em;
}

.text-input {
  width: 100%;
  height: 36px;
  padding: 0 10px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--foreground);
  font: 13px var(--font-sans);
  outline: none;
  transition: 140ms ease;
}

.text-input:hover {
  border-color: var(--border-strong);
}

.text-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 12%, transparent);
}

.login-submit {
  width: 100%;
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid var(--foreground);
  background: var(--foreground);
  color: var(--background);
  font: 13px var(--font-sans);
  cursor: pointer;
  transition: 160ms ease;
}

.login-submit:hover {
  opacity: 0.92;
}

.notice-warning {
  padding: 8px 12px;
  border: 1px solid color-mix(in srgb, var(--warning) 45%, var(--border));
  background: color-mix(in srgb, var(--warning) 8%, var(--card));
  font-size: 13px;
  line-height: 1.6;
}

@media (max-width: 720px) {
  .text-input {
    height: 40px;
  }
}