/* 글로벌 스타일 및 폰트 셋업 */
@import url('https://fonts.googleapis.com/css2?family=Pretendard:wght@400;500;600;700;800&display=swap');

:root {
  /* 기존 다크모드 색감 완벽 유지 */
  --bg-color: #030712;
  --text-main: #f3f4f6;
  --text-sub: #9ca3af;
  --text-muted: #6b7280;
  --navbar-bg: rgba(3, 7, 18, 0.7);
  --card-bg: rgba(15, 23, 42, 0.45);
  --card-border: rgba(255, 255, 255, 0.08);
  --preview-bg: rgba(255, 255, 255, 0.02);
  --preview-border: rgba(255, 255, 255, 0.07);
  --tag-bg: rgba(6, 182, 212, 0.08);
  --tag-border: rgba(6, 182, 212, 0.2);
  --radial-1: rgba(99, 102, 241, 0.15);
  --radial-2: rgba(6, 182, 212, 0.12);
  --cta-bg: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(6, 182, 212, 0.05));
  --cta-border: rgba(99, 102, 241, 0.2);
}

[data-theme="light"] {
  /* 매칭되는 세련된 라이트모드 색감 인터페이스 */
  --bg-color: #f8fafc;
  --text-main: #0f172a;
  --text-sub: #475569;
  --text-muted: #94a3b8;
  --navbar-bg: rgba(248, 250, 252, 0.8);
  --card-bg: rgba(255, 255, 255, 0.8);
  --card-border: rgba(15, 23, 42, 0.06);
  --preview-bg: #ffffff;
  --preview-border: rgba(15, 23, 42, 0.08);
  --tag-bg: rgba(6, 182, 212, 0.05);
  --tag-border: rgba(6, 182, 212, 0.3);
  --radial-1: rgba(99, 102, 241, 0.06);
  --radial-2: rgba(6, 182, 212, 0.05);
  --cta-bg: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(6, 182, 212, 0.03));
  --cta-border: rgba(99, 102, 241, 0.15);
}

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

html,
body {
  height: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: 'Pretendard', system-ui, -apple-system, sans-serif;
  color: var(--text-main);
  background-color: var(--bg-color);
  background-image:
    radial-gradient(circle at 10% 15%, var(--radial-1) 0%, transparent 40%),
    radial-gradient(circle at 85% 60%, var(--radial-2) 0%, transparent 45%);
  background-attachment: fixed;
  padding-top: 80px;
  /* 프레임 수정을 위해 여백 확장 */
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s, color 0.3s;
}

a {
  color: inherit;
  text-decoration: none;
}

/* NAVBAR */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  width: 100%;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--navbar-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--card-border);
  transition: background 0.3s, border-bottom 0.3s;
}

.navbar-inner {
  width: min(1300px, calc(100vw - 40px));
  /* 더 넓고 시원한 와이드 뷰로 확장 */
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo {
  font-weight: 800;
  letter-spacing: 0.15em;
  font-size: 1.25rem;
  background: linear-gradient(135deg, #6366f1, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.navbar-links a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-sub);
  padding: 8px 16px;
  border-radius: 8px;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar-links a:hover {
  background: var(--card-border);
  color: var(--text-main);
}

/* 수동 테마 토글 버튼 스타일 */
.theme-toggle-btn {
  background: transparent;
  border: 1px solid var(--card-border);
  cursor: pointer;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.theme-toggle-btn:hover {
  background: var(--card-border);
}

.navbar-auth {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-sub);
}

.user-nick {
  font-weight: 600;
  color: #06b6d4;
}

.logout-link {
  color: #ef4444;
  opacity: 0.8;
  cursor: pointer;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  background: rgba(239, 68, 68, 0.1);
  transition: all 0.2s;
}

.logout-link:hover {
  opacity: 1;
  background: rgba(239, 68, 68, 0.2);
}

/* 레이아웃 래퍼 */
.landing-wrapper {
  min-height: calc(100vh - 80px);
}

.hero {
  padding: 40px 0 60px;
  display: flex;
  justify-content: center;
}

.hero-inner {
  width: min(1300px, calc(100vw - 40px));
  background: transparent;
  /* 외곽 가두는 프레임을 없애 레이아웃을 전면 개방 */
  backdrop-filter: none;
  border: none;
  box-shadow: none;
  padding: 0;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  /* 2분할 대시보드 아키텍처 */
  gap: 40px;
  align-items: stretch;
}

/* 왼쪽 메인 텍스트 영역을 독립된 솔리드 보드로 가공 */
.hero-main {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 24px;
  padding: 48px;
  border: 1px solid var(--card-border);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 8px;
  /* 각진 테크 느낌을 위해 둥글기 최적화 */
  font-size: 0.8rem;
  font-weight: 600;
  color: #818cf8;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.25);
  margin-bottom: 24px;
  align-self: flex-start;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #6366f1;
  box-shadow: 0 0 8px #6366f1;
}

.hero-main h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-main h1 span {
  background: linear-gradient(135deg, #6366f1, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  margin-bottom: 32px;
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text-sub);
}

.btn-primary {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  background: linear-gradient(135deg, #4f46e5, #06b6d4);
  box-shadow: 0 10px 25px rgba(79, 70, 229, 0.35);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary::after {
  content: "→";
  font-size: 1.1rem;
  transition: transform 0.2s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 30px rgba(6, 182, 212, 0.45);
  filter: brightness(1.1);
}

.btn-primary:hover::after {
  transform: translateX(4px);
}

.hero-note {
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-note .dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--text-muted);
}

/* 오른쪽 프리뷰 카드를 하나의 독립된 전광판 패널처럼 구조 고도화 */
.hero-preview {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--preview-bg);
  border-radius: 24px;
  border: 1px solid var(--preview-border);
  padding: 32px;
  box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.05);
}

.preview-card {
  width: 100%;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.preview-title {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--card-border);
  color: var(--text-sub);
}

.preview-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: #34d399;
  font-weight: 600;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 12px #10b981;
}

.preview-role {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.preview-desc {
  font-size: 0.88rem;
  color: var(--text-sub);
  margin-bottom: 20px;
  line-height: 1.4;
}

.preview-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
}

.tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  color: #06b6d4;
}

.preview-list {
  list-style: none;
  font-size: 0.88rem;
  color: var(--text-sub);
  margin-bottom: 20px;
}

.preview-list li {
  position: relative;
  padding-left: 20px;
}

.preview-list li::before {
  content: "▹";
  position: absolute;
  left: 4px;
  color: #6366f1;
  font-weight: bold;
}

.preview-list li+li {
  margin-top: 10px;
}

.preview-foot {
  font-size: 0.75rem;
  color: var(--text-muted);
  border-top: 1px solid var(--card-border);
  padding-top: 12px;
}

.guide-section {
  padding: 100px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.guide-header {
  text-align: center;
  /* 전체적인 대칭 균형을 위해 헤더도 중앙 정렬로 구성 */
  width: min(1200px, calc(100vw - 40px));
  margin-bottom: 56px;
  max-width: 650px;
}

.guide-header h2 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.guide-header p {
  font-size: 1.05rem;
  color: var(--text-sub);
  line-height: 1.5;
}

/* 6개의 카드가 3열 2행(또는 반응형에 따라 2열 3행)으로 완벽하게 대칭을 이루는 그리드 */
.guides {
  width: min(1200px, calc(100vw - 40px));
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  /* 3열 정대칭 */
  gap: 24px;
  /* 카드 사이의 여백을 균일하게 설정 */
}

/* 개별 가이드 카드 (크기와 여백을 모두 균등하게 통일) */
.guide {
  background: var(--card-bg);
  border-radius: 20px;
  padding: 32px 28px;
  border: 1px solid var(--card-border);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  height: 100%;
  /* 모든 카드의 높이를 내부 콘텐츠 양에 상관없이 균일하게 맞춤 */
}

/* [중요] 기존의 nth-child 비대칭 확장 코드를 완전히 제거하여 정대칭을 이룸 */
.guides .guide:nth-child(1),
.guides .guide:nth-child(5) {
  grid-column: auto;
  /* 기본 크기로 원위치 */
  background: var(--card-bg);
  border-color: var(--card-border);
}

.guide:hover {
  transform: translateY(-6px);
  background: var(--card-bg);
  border-color: rgba(99, 102, 241, 0.4);
  /* 호버 시 포인트 인디고 컬러 라인 크리에이트 */
  box-shadow: 0 20px 40px rgba(99, 102, 241, 0.08);
}

.guide-icon {
  font-size: 2.2rem;
  margin-bottom: 4px;
  display: inline-block;
}

.guide h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}

.guide p {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.6;
}

@media (max-width: 1024px) {
  .guides {
    grid-template-columns: repeat(2, 1fr);
    /* 태블릿이나 애매한 해상도에서는 깔끔하게 2열 대칭(2열 3행) */
    gap: 20px;
  }
}

@media (max-width: 640px) {
  .guides {
    grid-template-columns: 1fr;
    /* 모바일 환경에서는 한 줄에 하나씩 수직 정대칭 정렬 */
    gap: 16px;
  }

  .guide-header h2 {
    font-size: 1.75rem;
  }
}

.cta-section {
  padding: 40px 0 100px;
  display: flex;
  justify-content: center;
}

.cta-inner {
  width: min(1300px, calc(100vw - 40px));
  border-radius: 24px;
  padding: 48px 56px;
  background: var(--cta-bg);
  border: 1px solid var(--cta-border);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
  display: flex;
  justify-content: space-between;
  gap: 32px;
  align-items: center;
}

.cta-text h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
}

.cta-text p {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.5;
}

.cta-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 14px 28px;
  border-radius: 10px;
  border: 1px solid var(--card-border);
  background: transparent;
  color: var(--text-sub);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-ghost:hover {
  background: var(--card-border);
  color: var(--text-main);
}

@media (max-width: 1100px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-main h1 {
    font-size: 2.6rem;
  }

  .guides {
    grid-template-columns: repeat(2, 1fr);
  }

  .guides .guide:nth-child(1),
  .guides .guide:nth-child(5) {
    grid-column: span 1;
  }

  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 40px;
  }

  .cta-actions {
    width: 100%;
  }

  .cta-actions button,
  .cta-actions .btn-ghost {
    flex: 1;
    justify-content: center;
  }
}

@media (max-width: 640px) {
  body {
    padding-top: 72px;
  }

  .hero-main h1 {
    font-size: 2rem;
  }

  .hero-inner,
  .guides,
  .cta-inner {
    width: calc(100vw - 24px);
  }

  .hero-main {
    padding: 28px;
  }

  .guides {
    grid-template-columns: 1fr;
  }
}