:root {
  --canvas: #F5F5F5;
  --card: #ffffff;
  --ink: #191919;
  --muted: #7a7a7a;
  --line: #e6e6e6;
  --yellow: #FEE500;
  --danger: #e53935;
  --radius: 14px;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  background: var(--canvas);
  color: var(--ink);
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
}

.card {
  width: 100%;
  max-width: 400px;
  background: var(--card);
  border-radius: var(--radius);
  padding: 40px 28px 32px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.04);
}

.brand {
  margin: 0;
  text-align: center;
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.tagline {
  margin: 8px 0 28px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.form { display: flex; flex-direction: column; gap: 10px; }

.field input {
  width: 100%;
  height: 48px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 1rem;
  color: var(--ink);
  background: #fff;
}

.field input:focus {
  outline: 2px solid var(--yellow);
  border-color: #ead800;
}

.field.invalid input { border-color: var(--danger); }

.field-password { position: relative; }
.field-password input { padding-right: 68px; }

.toggle {
  position: absolute;
  right: 8px;
  top: 8px;
  height: 32px;
  padding: 0 10px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 0.85rem;
  cursor: pointer;
}

.error {
  margin: 0;
  color: var(--danger);
  font-size: 0.82rem;
}

.remember {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 6px 0 4px;
  font-size: 0.9rem;
  color: #333;
}

.primary {
  height: 48px;
  border: 0;
  border-radius: 12px;
  background: var(--yellow);
  color: var(--ink);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}

.primary:hover { filter: brightness(0.97); }

.links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-top: 24px;
  font-size: 0.82rem;
}

.links a { color: var(--muted); text-decoration: none; }
.links a:hover { color: var(--ink); }

.legal {
  margin-top: 20px;
  font-size: 0.75rem;
  color: #aaa;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

@media (min-width: 768px) {
  .card { padding: 48px 40px 36px; max-width: 420px; }
  .brand { font-size: 2rem; }
}

@media (min-width: 1024px) {
  .page { padding: 48px; }
}

.primary.is-loading {
  cursor: wait;
  opacity: 0.85;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid #191919;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}