:root {
  --auth-panel-w: 440px;
}

body.auth-body {
  margin: 0;
  min-height: 100vh;
  font-family: "Pretendard", -apple-system, "Segoe UI", Roboto, sans-serif;
  background-color: #ffffff;
}

.auth-shell {
  display: flex;
  min-height: 100vh;
}

/* ===== 좌측 브랜드 패널 ===== */
.auth-brand-panel {
  width: var(--auth-panel-w);
  flex-shrink: 0;
  background-color: var(--color-dark);
  color: #eff6f3;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 48px 40px;
  overflow: hidden;
}

.auth-brand-top {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15px;
  position: relative;
  z-index: 2;
}

.auth-brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background-color: var(--color-accent);
  color: var(--color-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.auth-brand-copy {
  position: relative;
  z-index: 2;
}

.auth-brand-copy h2 {
  font-size: 26px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}

.auth-brand-copy p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(239, 246, 243, 0.75);
  margin: 0;
}

.auth-brand-foot {
  font-size: 12px;
  color: rgba(239, 246, 243, 0.4);
  position: relative;
  z-index: 2;
}

/* 호흡 곡선 시그니처 — 화면 하단에 흐르는 사인파, 장식이 아니라 '폐활량 곡선'의 변형 */
.breath-curve {
  position: absolute;
  left: -10%;
  bottom: -40px;
  width: 120%;
  height: auto;
  opacity: 0.9;
  z-index: 1;
}

/* ===== 우측 폼 영역 ===== */
.auth-form-panel {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  background-color: var(--color-bg);
}

.auth-form-card {
  width: 100%;
  max-width: 380px;
}

.auth-form-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-darker);
  margin-bottom: 6px;
}

.auth-form-subtitle {
  font-size: 13.5px;
  color: var(--color-muted);
  margin-bottom: 28px;
}

.auth-form-card .form-control {
  border-color: var(--color-border);
  padding: 10px 14px;
}

.auth-form-card .form-control:focus {
  border-color: var(--color-main);
  box-shadow: 0 0 0 3px rgba(74, 124, 114, 0.12);
}

.auth-form-card label.form-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-darker);
}

@media (max-width: 860px) {
  .auth-brand-panel {
    display: none;
  }
}

/* ===== Parsley 클라이언트 검증 스타일 ===== */
.auth-form-card .parsley-errors-list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  font-size: 12.5px;
  color: var(--color-danger);
}

.auth-form-card .parsley-error {
  border-color: var(--color-danger) !important;
}

.auth-form-card .parsley-error:focus {
  box-shadow: 0 0 0 3px rgba(216, 90, 48, 0.12) !important;
}

.auth-form-card .parsley-success {
  border-color: var(--color-main) !important;
}