/* 폰트 및 기본 설정 */
@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;600;700&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 다크모드 지원을 위한 CSS 변수 구조 변경 */
:root {
  /* meloming.com 스타일 컬러 팔레트 - 라이트 모드 */
  --primary-color: #0066ff;
  --primary-hover: #0051cc;
  --success-color: #10b981;
  --error-color: #ef4444;

  /* 배경 및 카드 */
  --bg-primary: #ffffff;
  --bg-secondary: #f9f9f9;
  --bg-card: #ffffff;

  /* 텍스트 */
  --text-primary: #1a1a1a;
  --text-secondary: #6b6b6b;
  --text-muted: #9ca3af;

  /* 보더 */
  --border-color: #e0e0e0;
  --border-focus: var(--primary-color);

  /* 그림자 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

  /* 반경 */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* 트랜지션 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* 다크 모드 CSS 변수 */
[data-theme="dark"] {
  --bg-primary: #121212;
  --bg-secondary: #1a1a1a;
  --bg-card: #1e1e1e;

  --text-primary: #f5f5f5;
  --text-secondary: #a0a0a0;
  --text-muted: #6b6b6b;

  --border-color: #2e2e2e;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* 시스템 다크모드 감지 */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-primary: #121212;
    --bg-secondary: #1a1a1a;
    --bg-card: #1e1e1e;

    --text-primary: #f5f5f5;
    --text-secondary: #a0a0a0;
    --text-muted: #6b6b6b;

    --border-color: #2e2e2e;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
  }
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* 페이지 래퍼 */
.page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ==================== 헤더 ==================== */
.header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--primary-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.logo-icon svg {
  width: 18px;
  height: 18px;
}

.logo-text {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

/* 헤더 우측 영역 */
.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--primary-color);
}

/* 테마 토글 버튼 */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  color: var(--primary-color);
  border-color: var(--primary-color);
}

.theme-icon {
  width: 18px;
  height: 18px;
}

/* 라이트 모드: 태양 아이콘 숨김, 달 아이콘 표시 */
.sun-icon {
  display: none;
}

.moon-icon {
  display: block;
}

/* 다크 모드: 달 아이콘 숨김, 태양 아이콘 표시 */
[data-theme="dark"] .sun-icon {
  display: block;
}

[data-theme="dark"] .moon-icon {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .sun-icon {
    display: block;
  }
  :root:not([data-theme="light"]) .moon-icon {
    display: none;
  }
}

/* ==================== 메인 콘텐츠 ==================== */
.main-content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

/* 가로 레이아웃 */
.content-wrapper.horizontal-layout {
  width: 100%;
  max-width: 1000px;
  display: flex;
  align-items: stretch;
  gap: 2rem;
}

/* 히어로 섹션 (가로 레이아웃 좌측) */
.hero-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1rem 0;
  margin-top: -3rem; 
}

.hero-badge {
  display: inline-block;
  width: fit-content;
  padding: 0.25rem 0.75rem;
  background: rgba(0, 102, 255, 0.1);
  color: var(--primary-color);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 100px;
  margin-bottom: 1rem;
}

.hero-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.hero-description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

/* 진행 상태 가로형 */
.progress-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: -0.2rem; 
}

.progress-step {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.step-number {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: all var(--transition-normal);
}

.step-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.progress-step.active .step-number {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.15);
}

.progress-step.active .step-label {
  color: var(--text-primary);
  font-weight: 600;
}

.progress-step.completed .step-number {
  background: var(--success-color);
  border-color: var(--success-color);
  color: white;
}

.progress-step.completed .step-label {
  color: var(--success-color);
}

.progress-line {
  width: 24px;
  height: 2px;
  background: var(--border-color);
  position: relative;
  overflow: hidden;
}

.progress-line::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--primary-color);
  width: 0%;
  transition: width 0.5s ease;
}

.progress-line.completed::after {
  width: 100%;
}

/* ==================== 폼 카드 ==================== */
.form-card {
  flex: 1;
  max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

/* 폼 스텝 */
.register-form {
  position: relative;
  min-height: 280px;
}

.form-step {
  opacity: 0;
  transform: translateX(20px);
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  pointer-events: none;
  transition: all 0.4s ease;
}

.form-step.active {
  opacity: 1;
  transform: translateX(0);
  position: relative;
  pointer-events: auto;
}

.form-step.slide-in {
  animation: slideIn 0.4s ease forwards;
}

.form-step.slide-out {
  animation: slideOut 0.3s ease forwards;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideOut {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(-20px);
  }
}

/* 스텝 헤더 */
.step-header {
  /* 상단 여백 추가하여 에러 없을 때도 동일한 간격 유지 */
  padding-top: 0.5rem;
  margin-bottom: 1.25rem;
}

.step-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.title-accent {
  width: 3px;
  height: 16px;
  background: var(--primary-color);
  border-radius: 2px;
}

.step-description {
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding-left: calc(3px + 0.5rem);
}

/* 입력 그룹 */
.input-group {
  margin-bottom: 1.25rem;
}

.input-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.375rem;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrapper.has-prefix {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  transition: all var(--transition-fast);
}

.input-wrapper.has-prefix:focus-within {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.input-prefix {
  padding: 0 0 0 0.875rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  white-space: nowrap;
  background: transparent;
}

.form-input {
  flex: 1;
  background: transparent;
  border: none;
  padding: 0.75rem;
  font-size: 0.9rem;
  color: var(--text-primary);
  outline: none;
  width: 100%;
}

.input-wrapper:not(.has-prefix) .form-input {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  transition: all var(--transition-fast);
}

.input-wrapper:not(.has-prefix) .form-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-input::placeholder {
  color: var(--text-muted);
}

.input-icon {
  position: absolute;
  right: 0.875rem;
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  pointer-events: none;
}

.input-icon svg {
  width: 100%;
  height: 100%;
}

/* 선택된 ID 카드 */
.selected-id-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
}

.selected-id-info {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.selected-id-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 500;
}

.selected-id-value {
  font-size: 0.85rem;
  font-weight: 600;
}

.id-prefix {
  color: var(--text-secondary);
}

#selectedIdText {
  color: var(--primary-color);
}

/* 수정 버튼 */
#editIdButton {
  white-space: nowrap;
  flex-shrink: 0;
}

#editIdButton svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* ==================== 버튼 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-decoration: none;
  position: relative;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 102, 255, 0.25);
}

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 0.375rem 0.5rem;
}

.btn-ghost:hover {
  color: var(--primary-color);
  background: rgba(0, 102, 255, 0.05);
}

.btn-sm {
  padding: 0.375rem 0.5rem;
  font-size: 0.75rem;
}

.btn-full {
  width: 100%;
}

.btn-icon {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.btn-icon-left {
  margin-right: -0.125rem;
}

.btn-primary:hover .btn-icon {
  transform: translateX(3px);
}

.btn-icon-only {
  padding: 0.375rem;
  min-width: 32px;
  height: 32px;
}

.btn-icon-only svg {
  width: 16px;
  height: 16px;
}

.btn-group {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.btn-group .btn {
  flex: 1;
}

/* 버튼 로딩/성공 상태 */
.btn-loader,
.btn-success {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0;
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.submit-button.loading .btn-text,
.submit-button.success .btn-text {
  opacity: 0;
}

.submit-button.loading .btn-loader {
  opacity: 1;
}

.submit-button.success .btn-success {
  opacity: 1;
}

.submit-button.success {
  background: var(--success-color);
}

/* ==================== 완료 화면 ==================== */
.completion-content {
  text-align: center;
  padding: 0.5rem 0;
}

.success-icon-wrapper {
  width: 56px;
  height: 56px;
  margin: 0 auto 1rem;
  background: linear-gradient(135deg, var(--success-color), #059669);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  animation: successPop 0.5s ease;
}

.success-icon-wrapper svg {
  width: 28px;
  height: 28px;
  stroke-width: 2.5;
}

@keyframes successPop {
  0% {
    transform: scale(0);
    opacity: 0;
  }
  50% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.completion-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.completion-description {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.result-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem;
}

.result-link-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.result-link {
  flex: 1;
  color: var(--success-color);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  word-break: break-all;
}

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

.copy-icon,
.check-icon {
  width: 16px;
  height: 16px;
}

#copyLinkButton.copied {
  color: var(--success-color);
}

/* ==================== 메시지 ==================== */
/* 메시지 컨테이너 공간 확보를 위한 래퍼 추가 */
.message-container {
  padding: 0;
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  font-weight: 500;
  text-align: center;
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition-normal);
  white-space: pre-line;
  /* 에러 전에도 동일한 상단 여백 유지 */
  margin-top: 0;
}

.message-container.show {
  opacity: 1;
  max-height: 100px;
  padding: 0.625rem 0.75rem;
  margin-bottom: 0.75rem;
}

.message-container.error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #dc2626;
}

[data-theme="dark"] .message-container.error {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
}

.message-container.success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: #059669;
}

[data-theme="dark"] .message-container.success {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

/* ==================== Turnstile ==================== */
.turnstile-container {
  display: flex;
  justify-content: center;
  margin: 0.75rem 0;
  transform: scale(0.85);
  transform-origin: center;
}

/* ==================== 푸터 ==================== */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 0.75rem 1.5rem;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-text {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer-link {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--primary-color);
}

/* ==================== 공지 토스트 ==================== */
.notice-toast {
  position: fixed;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  max-width: 90%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.75rem 1rem;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.notice-toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.notice-icon {
  width: 18px;
  height: 18px;
  color: var(--primary-color);
  flex-shrink: 0;
}

.notice-icon svg {
  width: 100%;
  height: 100%;
}

.notice-text {
  font-size: 0.8rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* ==================== 반응형 (세로 레이아웃 폴백) ==================== */
@media (max-width: 900px) {
  .content-wrapper.horizontal-layout {
    flex-direction: column;
    max-width: 480px;
    gap: 1.5rem;
  }

  .hero-section {
    text-align: center;
    align-items: center;
  }

  .hero-title {
    font-size: 1.5rem;
  }

  .progress-container {
    justify-content: center;
  }

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

@media (max-width: 640px) {
  .header-nav {
    display: none;
  }

  .hero-title {
    font-size: 1.375rem;
  }

  .hero-title br {
    display: none;
  }

  .hero-description {
    font-size: 0.85rem;
  }

  .form-card {
    padding: 1.25rem;
  }

  .btn-group {
    flex-direction: column;
  }

  .footer-inner {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}

/* ==================== 접근성 ==================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

.form-input:focus,
.btn:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

::selection {
  background: rgba(0, 102, 255, 0.2);
  color: var(--text-primary);
}

/* 스크롤바 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

#step1 {
  margin-top: 1.2em;
}

#step3 {
  margin-top: 1.2em;
}