:root {
  color-scheme: dark;
  --ink: #e8ecea;
  --muted: #a7b3b0;
  --gold: #dcc58f;
  --jade: #6bd3b0;
  --panel: #0d171c;
  --line: rgba(220, 197, 143, 0.25);
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 15%, rgba(107, 211, 176, 0.08), transparent 32%),
    radial-gradient(circle at 85% 75%, rgba(220, 197, 143, 0.08), transparent 36%),
    #071014;
  font-family: system-ui, -apple-system, "Noto Sans KR", sans-serif;
}

.auth-shell { width: min(100% - 32px, 520px); margin: 0 auto; padding: 64px 0; }
.auth-brand { display: inline-flex; gap: 12px; align-items: center; margin-bottom: 28px; color: var(--ink); text-decoration: none; }
.auth-brand span { display: grid; width: 42px; height: 42px; place-items: center; border: 1px solid var(--line); color: var(--gold); font: 24px Georgia, serif; }
.auth-card { padding: clamp(28px, 6vw, 46px); border: 1px solid var(--line); background: linear-gradient(145deg, rgba(220,197,143,.035), transparent 42%), var(--panel); box-shadow: 0 24px 70px rgba(0,0,0,.35); }
.eyebrow { margin: 0 0 10px; color: var(--gold); font-size: 11px; font-weight: 800; letter-spacing: .16em; }
h1 { margin: 0; font: 500 clamp(34px, 8vw, 48px) Georgia, "Noto Serif KR", serif; }
.auth-copy { margin: 18px 0 28px; color: var(--muted); line-height: 1.7; }
.auth-form { display: grid; gap: 10px; }
.auth-form label { margin-top: 8px; color: var(--gold); font-size: 12px; font-weight: 800; }
.auth-form input { width: 100%; padding: 14px; border: 1px solid rgba(145,160,164,.3); border-radius: 2px; color: var(--ink); background: #071014; font: inherit; }
.auth-form input:focus { outline: 2px solid rgba(107,211,176,.55); outline-offset: 1px; }
.auth-form button, .auth-button { display: inline-flex; justify-content: center; margin-top: 16px; padding: 14px 20px; border: 1px solid var(--jade); border-radius: 2px; color: #06110d; background: var(--jade); font: inherit; font-weight: 800; text-decoration: none; cursor: pointer; }
.auth-button.secondary { color: var(--gold); border-color: var(--gold); background: transparent; }
.auth-error, .field-error { color: #f0a38e; }
.auth-error { padding: 12px; border: 1px solid rgba(240,163,142,.35); background: rgba(240,163,142,.06); }
.field-error { margin: 0; font-size: 12px; }
.auth-help { color: var(--muted); font-size: 12px; line-height: 1.55; }
.auth-help ul { margin: 4px 0 8px; padding-left: 20px; }
.auth-footnote { margin: 24px 0 0; color: var(--muted); font-size: 12px; text-align: center; }
.auth-links { display: flex; gap: 18px; justify-content: center; margin-top: 24px; }
.auth-links a { color: var(--gold); }

@media (max-width: 520px) {
  .auth-shell { padding: 28px 0; }
  .auth-card { padding: 26px 20px; }
}