/* ═══ login.css ══════════════════════════════════
 * 로그인 / 회원가입 / 비밀번호 재설정 레이아웃 및 컴포넌트
 * 스플릿 패널: 브랜드 패널(좌) + 폼 패널(우)
 * ════════════════════════════════════════════════ */

/* ─── 변수 ───────────────────────────────────── */
:root {
  --login-primary:       #000000;
  --login-primary-hover: #333333;
  --login-primary-glow:  rgba(0, 0, 0, 0.15);
  --login-brand-bg:      #0b0d17;
  --login-form-bg:       #f1f5f9;
  --login-card-bg:       #ffffff;
  --login-text:          #1e1b4b;
  --login-text-muted:    #64748b;
  --login-border:        #e2e8f0;
  --login-input-border:  #cbd5e1;
  --login-danger:        #dc2626;
  --login-success:       #16a34a;
  --login-radius:        14px;
  --login-shadow:        0 4px 28px rgba(0, 0, 0, 0.08), 0 1px 4px rgba(0, 0, 0, 0.04);
}

/* ─── 로그인 섹션 레이아웃 ─────────────────────
 * 기본 숨김 — FOUC 방지 (head 의 sync 스크립트가 <html data-auth> 를 세팅한 뒤
 * data-auth="out" 일 때만 로그인 표시, "in" 일 때는 포털 표시).
 * 인증 상태 확인 후 JS 가 명시적으로 display:flex 를 설정하면 이 규칙을 덮어씀.
 * ─────────────────────────────────────────── */
#loginSection {
  display: none;
  min-height: 100vh;
}
html[data-auth="out"] #loginSection { display: flex; }

/* ─── 브랜드 패널 (좌측) ─────────────────────── */
.login-brand {
  flex: 0 0 42%;
  background: var(--login-brand-bg);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  padding: 64px 56px;
}

/* 도트 그리드 패턴 */
.login-brand::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 30px 30px;
  pointer-events: none;
}

/* 우측 경계 페이드 */
.login-brand::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 100%;
  background: linear-gradient(to right, transparent, rgba(11,13,23,0.6));
  pointer-events: none;
}

/* 인디고 글로우 오브 */
.login-brand__glow {
  position: absolute;
  bottom: -120px;
  right: -80px;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(0,0,0,0.18) 0%, rgba(0,0,0,0.05) 45%, transparent 70%);
  pointer-events: none;
  animation: login-glow-pulse 4s ease-in-out infinite;
}

@keyframes login-glow-pulse {
  0%, 100% { opacity: 0.8; transform: scale(1); }
  50%       { opacity: 1;   transform: scale(1.08); }
}

.login-brand__content {
  position: relative;
  z-index: 1;
}

.login-brand__mark {
  width: 44px;
  height: 44px;
  margin-bottom: 44px;
  display: block;
}

.login-brand__mark svg {
  width: 100%;
  height: 100%;
  display: block;
}

.login-brand__headline {
  font-size: 2.875rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1.1;
  letter-spacing: -0.035em;
  margin: 0 0 20px;
}

.login-brand__tagline {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.75;
  margin: 0 0 44px;
}

.login-brand__features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.login-brand__feature {
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.01em;
}

.login-brand__feature::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #000000;
  flex-shrink: 0;
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.6);
}

/* ─── 폼 패널 (우측) ─────────────────────────── */
.login-forms {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--login-form-bg);
  min-height: 100vh;
  overflow-y: auto;
  padding: 40px 24px;
}

/* ─── 래퍼 (하위 호환) ───────────────────────── */
.login-wrapper {
  width: 100%;
  max-width: 420px;
}

/* ─── 뷰 전환 ────────────────────────────────── */
.login-view {
  display: none;
  width: 100%;
  max-width: 420px;
}

.login-view.active {
  display: block;
}

/* ─── 카드 ───────────────────────────────────── */
.login-card {
  width: 100%;
  background: var(--login-card-bg);
  border-radius: var(--login-radius);
  box-shadow: var(--login-shadow);
  padding: 44px 40px;
  border: 1px solid rgba(0, 0, 0, 0.04);
}

/* ─── 카드 헤더 ──────────────────────────────── */
.login-card__logo {
  margin-bottom: 30px;
}

.login-card__logo-icon {
  width: 46px;
  height: 46px;
  background: var(--login-primary);
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

.login-card__logo-icon svg {
  width: 22px;
  height: 22px;
  fill: #fff;
}

.login-card__title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--login-text);
  margin: 0 0 5px;
  letter-spacing: -0.025em;
}

.login-card__subtitle {
  font-size: 0.875rem;
  color: var(--login-text-muted);
  margin: 0;
}

/* ─── 폼 필드 ────────────────────────────────── */
.login-field {
  margin-bottom: 16px;
}

.login-field__label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #374151;
  margin-bottom: 7px;
  letter-spacing: 0.005em;
}

.login-field__input-group {
  display: flex;
  align-items: stretch;
  border: 1.5px solid var(--login-input-border);
  border-radius: 9px;
  overflow: hidden;
  background: #fff;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.login-field__input-group:focus-within {
  box-shadow: 0 0 0 3px var(--login-primary-glow);
}

.login-field__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  flex-shrink: 0;
  color: #9ca3af;
  border-right: 1.5px solid var(--login-border);
  background: #fafafa;
}

.login-field__icon svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.login-field__input {
  flex: 1;
  border: none;
  padding: 11px 13px;
  font-size: 0.9375rem;
  outline: none;
  background: transparent;
  color: var(--login-text);
  font-family: inherit;
  min-width: 0;
}

.login-field__input::placeholder {
  color: #b0bec5;
  font-size: 0.875rem;
}

.login-field__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  flex-shrink: 0;
  background: none;
  border: none;
  color: #9ca3af;
  cursor: pointer;
  transition: color 0.15s;
}

.login-field__toggle:hover {
  color: var(--login-text);
}

.login-field__toggle svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

/* ─── 알럿 ───────────────────────────────────── */
.login-alert {
  display: none;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.8125rem;
  margin-bottom: 14px;
  align-items: center;
  gap: 8px;
}

.login-alert.visible {
  display: flex;
}

.login-alert--error {
  background: #fef2f2;
  color: var(--login-danger);
  border: 1px solid #fecaca;
}

.login-alert--success {
  background: #f0fdf4;
  color: var(--login-success);
  border: 1px solid #bbf7d0;
}

.login-alert--info {
  background: #eff6ff;
  color: #2563eb;
  border: 1px solid #bfdbfe;
}

.login-alert svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
  flex-shrink: 0;
}

/* ─── 로그인 버튼 ─────────────────────────────── */
.login-btn {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 9px;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background 0.18s ease, box-shadow 0.18s ease, transform 0.12s ease;
  font-family: inherit;
  letter-spacing: 0.01em;
}

.login-btn--primary {
  background: var(--login-primary);
  color: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.login-btn--primary:hover {
  background: var(--login-primary-hover);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.28);
  transform: translateY(-1px);
}

.login-btn--primary:active {
  transform: translateY(0);
}

.login-btn--primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.login-btn__spinner {
  display: none;
  width: 17px;
  height: 17px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: login-spin 0.6s linear infinite;
}

.login-btn--loading .login-btn__spinner {
  display: block;
}

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

/* ─── 로그인 상태 유지 ───────────────────────── */
.login-remember {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
}

.login-remember__checkbox {
  width: 15px;
  height: 15px;
  accent-color: var(--login-primary);
  cursor: pointer;
}

.login-remember__label {
  font-size: 0.8125rem;
  color: var(--login-text-muted);
  cursor: pointer;
}

/* ─── 구분선 ─────────────────────────────────── */
.login-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 22px 0;
  color: var(--login-text-muted);
  font-size: 0.75rem;
}

.login-divider::before,
.login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--login-border);
}

/* ─── SNS 로그인 ─────────────────────────────── */
.login-sns {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.login-sns__btn {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--login-border);
  border-radius: 9px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background 0.15s, border-color 0.15s;
  background: #fff;
  color: var(--login-text);
  text-decoration: none;
  font-family: inherit;
}

.login-sns__btn:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}

.login-sns__btn svg {
  width: 18px;
  height: 18px;
}

/* ─── 하단 링크 ──────────────────────────────── */
.login-footer {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--login-border);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.login-footer__link {
  font-size: 0.8125rem;
  color: var(--login-text-muted);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.15s;
}

.login-footer__link:hover {
  color: var(--login-primary);
}

.login-footer__sep {
  color: var(--login-border);
  font-size: 0.8125rem;
}

/* ─── 비밀번호 강도 ──────────────────────────── */
.password-strength {
  margin-top: 8px;
}

.password-strength__bar {
  height: 3px;
  background: #e9ecef;
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 6px;
}

.password-strength__fill {
  height: 100%;
  width: 0;
  border-radius: 2px;
  transition: width 0.3s, background 0.3s;
}

.password-strength__checks {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  font-size: 0.6875rem;
  color: var(--login-text-muted);
}

.password-strength__check--pass { color: var(--login-success); }
.password-strength__check--fail { color: var(--login-danger); }

/* ─── 로딩 오버레이 ──────────────────────────── */
.login-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(11, 13, 23, 0.82);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  color: #fff;
  gap: 18px;
}

.login-overlay.visible {
  display: flex;
}

.login-overlay__spinner {
  width: 44px;
  height: 44px;
  border: 2.5px solid rgba(255, 255, 255, 0.15);
  border-top-color: #000000;
  border-radius: 50%;
  animation: login-spin 0.7s linear infinite;
}

.login-overlay__text {
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  opacity: 0.75;
}

/* ─── 시스템 초기 설정 ───────────────────────── */
.login-info {
  font-size: 0.875rem;
  color: var(--login-text-muted);
  text-align: center;
  margin: 0 0 16px;
  line-height: 1.6;
}

.login-info--success { color: var(--login-success); font-weight: 600; }
.login-info--error   { color: var(--login-danger);  font-weight: 500; }

.login-init-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 16px 0;
}

.login-init-step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: #f8fafc;
  border: 1px solid var(--login-border);
  border-radius: 8px;
  font-size: 0.875rem;
}

.login-init-step__icon {
  font-size: 18px;
  min-width: 24px;
  text-align: center;
}

.login-init-done {
  text-align: center;
  margin-top: 20px;
}

.login-init-done .login-btn {
  margin-top: 12px;
}

/* ─── 반응형 ─────────────────────────────────── */
@media (max-width: 900px) {
  .login-brand {
    display: none;
  }

  .login-forms {
    background: var(--login-brand-bg);
  }

  .login-card {
    border: none;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.28);
  }
}

@media (max-width: 540px) {
  .login-forms {
    padding: 0;
    align-items: stretch;
    justify-content: flex-start;
    background: #fff;
  }

  .login-view {
    max-width: 100%;
  }

  .login-card {
    box-shadow: none;
    border-radius: 0;
    padding: 32px 20px;
    border: none;
  }

  .login-footer {
    flex-direction: column;
    align-items: center;
    gap: 4px;
  }

  .login-footer__sep {
    display: none;
  }
}
