:root {
  --font-family: 'Pretendard Variable', 'Pretendard', 'Noto Sans KR', 'Apple SD Gothic Neo', 'Segoe UI', sans-serif;
  --brand: #925528;
  --brand-dark: #442914;
  --surface: #ffffff;
  --surface-muted: #f4f6fb;
  --line: #e3e7f3;
  --text-primary: #22160c;
  --text-secondary: #5d3d1c;
  --alert-error: #fee4e2;
  --alert-success: #e5f6ed;
  --alert-info: #e7edff;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  font-family: var(--font-family);
  color: var(--text-primary);
  background: radial-gradient(circle at top, #eff3ff 0%, #f5f7fc 45%, #fafbff 100%);
}

.auth-shell {
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
}

.auth-card {
  width: 100%;
  max-width: 960px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: 0 25px 60px rgba(15, 23, 42, 0.08);
  overflow: hidden;
}

.auth-card--split {
  display: grid;
  grid-template-columns: minmax(260px, 1.1fr) minmax(320px, 380px);
}

.auth-illustration {
  position: relative;
  padding: 0;
  background: linear-gradient(135deg, #d7e6ff 0%, #eff2ff 100%);
  border-right: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 360px;
  aspect-ratio: 1 / 1;
  overflow: hidden;
}

.auth-illustration::before {
  content: "";
  position: absolute;
  inset: 16px;
  border-radius: 28px;
  border: 1px dashed rgba(92, 55, 28, 0.3);
  pointer-events: none;
}

.auth-illustration__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.auth-panel {
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.auth-header h1 {
  margin: 0;
  font-size: 28px;
  font-weight: 800;
}

.auth-header p {
  margin: 8px 0 0;
  color: var(--text-secondary);
  line-height: 1.5;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.input {
  height: 46px;
  padding: 0 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  font-size: 15px;
  background: var(--surface-muted);
  transition: border 0.2s, box-shadow 0.2s, background 0.2s;
}

.input:focus {
  outline: none;
  border-color: var(--brand);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(92, 55, 28, 0.15);
}

.btn {
  height: 48px;
  border-radius: 14px;
  border: none;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.2s, background 0.2s;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 12px 24px rgba(92, 55, 28, 0.25);
}

.btn-primary:hover { background: var(--brand-dark); }
.btn-primary:active { transform: translateY(1px); }

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--line);
}

.btn-outline:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 4px;
}

.actions .btn { flex: 1; }

.alert {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 12px 14px;
  border-radius: 14px;
  font-size: 14px;
  border: 1px solid transparent;
}

.alert-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 700;
}

.alert-error {
  background: var(--alert-error);
  border-color: #f2b4af;
}
.alert-error .alert-icon {
  background: #f87171;
  color: #fff;
}

.alert-success {
  background: var(--alert-success);
  border-color: #9fddb7;
}
.alert-success .alert-icon {
  background: #22c55e;
  color: #fff;
}

.alert-info {
  background: var(--alert-info);
  border-color: #9eb4ff;
}
.alert-info .alert-icon {
  background: var(--brand);
  color: #fff;
}

.link {
  font-size: 14px;
  text-align: center;
  color: var(--text-secondary);
  margin-top: 16px;
}

.link a {
  color: var(--brand);
  text-decoration: none;
  font-weight: 600;
}

.link a:hover { text-decoration: underline; }

.auth-card--stack {
  max-width: 480px;
  padding: 48px 40px;
}

@media (max-width: 900px) {
  .auth-card--split {
    grid-template-columns: 1fr;
  }
  .auth-illustration {
    border-right: none;
    border-bottom: 1px solid var(--line);
    aspect-ratio: auto;
    min-height: 240px;
  }
}

@media (max-width: 520px) {
  .auth-shell {
    padding: 16px;
  }
  .auth-panel {
    padding: 32px 20px 36px;
  }
  .auth-card--stack {
    padding: 32px 20px 36px;
  }
  .actions {
    flex-direction: column;
  }
}