/* ================================================
   common.css — QuizMirror 글로벌 스타일
   ================================================ */

/* ---------- CSS 커스텀 프로퍼티 ---------- */
:root {
  /* 블루 (소통 유형) */
  --color-primary: #4A90D9;
  --color-primary-light: #6BA8E8;
  --color-primary-dark: #3A78B8;

  /* 핑크 (연애 패턴) */
  --color-pink: #E8729A;
  --color-pink-light: #F090B8;
  --color-pink-dark: #C85A82;

  /* 그린 (스트레스 유형) */
  --color-green: #5CB85C;
  --color-green-light: #7ED47E;
  --color-green-dark: #489848;

  /* Neutrals */
  --color-bg: #FAFBFC;
  --color-surface: #FFFFFF;
  --color-border: #E8ECF0;
  --color-text: #2C3E50;
  --color-text-muted: #7F8C9A;
  --color-text-light: #FFFFFF;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Typography */
  --font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Layout */
  --container-max: 640px;
  --header-height: 60px;
}

/* ---------- 리셋 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

ul, ol {
  list-style: none;
}

/* ---------- 레이아웃 ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.page {
  padding-top: var(--header-height);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* ---------- 헤더 ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  display: flex;
  align-items: center;
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}

.logo img {
  width: 32px;
  height: 32px;
}

.lang-select {
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 4px 28px 4px 10px;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%237F8C9A' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  transition: border-color 0.15s, color 0.15s;
}

.lang-select:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
}

.lang-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(74, 144, 217, 0.15);
}

/* ---------- 헤더 네비게이션 ---------- */
.header-nav {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

.header-nav a {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}

.header-nav a:hover {
  color: var(--color-primary);
  background: rgba(74, 144, 217, 0.06);
}

.header-nav a.active {
  color: var(--color-primary);
  font-weight: 600;
}

/* ---------- 정렬 버튼 (Hot / New / Random) ---------- */
.sort-buttons {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
  align-items: center;
}

.sort-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}

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

.sort-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.sort-divider {
  width: 1px;
  height: 20px;
  background: var(--color-border);
  margin: 0 4px;
}

.logo-sub {
  font-size: var(--font-size-xs);
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  gap: var(--space-md);
}

.nav-links a {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

/* ---------- 푸터 ---------- */
.footer {
  padding: var(--space-xl) 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-2xl);
}

.footer a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

/* ---------- 버튼 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-light);
  box-shadow: 0 4px 12px rgba(74, 144, 217, 0.35);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(74, 144, 217, 0.45);
}

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

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-text-light);
}

.btn-lg {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--font-size-lg);
}

.btn-full {
  width: 100%;
}

/* ---------- 카드 ---------- */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-body {
  padding: var(--space-lg);
}

/* ---------- 광고 ---------- */
.ad-pc { display: none; }
.ad-pc ins { display: block; max-width: 728px; margin: 0 auto; }
.ad-mobile ins { display: block; max-width: 320px; margin: 0 auto; }
@media (min-width: 768px) {
  .ad-mobile { display: none; }
  .ad-pc { display: block; }
  .container, .header-inner { max-width: 800px; }
}

/* ---------- 섹션 ---------- */
.section {
  padding: var(--space-md) 0;
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}

/* ---------- 배지 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-text-light);
}

.badge-blue { background: var(--color-primary); }
.badge-pink { background: var(--color-pink); }
.badge-green { background: var(--color-green); }

/* ---------- 히어로 ---------- */
.hero.section {
  text-align: center;
  padding: var(--space-lg) var(--space-md);
}

.hero-title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  line-height: 1.2;
}

.hero-title span {
  color: var(--color-primary);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---------- 퀴즈 카드 (메인 페이지용) ---------- */
.quiz-card {
  display: block;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
}

.quiz-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.quiz-card-cover {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
}

.quiz-card-body {
  padding: var(--space-lg);
}

.quiz-card-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.quiz-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: var(--space-md);
}

.quiz-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.quiz-card-meta span {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ---------- 스킵 링크 ---------- */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: var(--space-sm) var(--space-md);
  z-index: 999;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 애니메이션 ---------- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.animate-fade-in {
  animation: fadeIn var(--transition-slow) ease both;
}

.animate-fade-in-up {
  animation: fadeInUp var(--transition-slow) ease both;
}

/* ---------- 카테고리 탭 ---------- */
.category-tabs {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}

.tab-btn {
  padding: 8px 18px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: inherit;
}

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

.tab-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ---------- 랜덤 시작 대형 카드 ---------- */
.random-hero-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-xl);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: var(--radius-xl);
  color: #fff;
  cursor: pointer;
  margin-bottom: var(--space-md);
  transition: transform 0.15s, box-shadow 0.15s;
  box-shadow: var(--shadow-md);
  user-select: none;
}

.random-hero-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.random-hero-card:active {
  transform: translateY(0);
}

.random-hero-icon {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.random-hero-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.random-hero-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
}

.random-hero-sub {
  font-size: var(--font-size-sm);
  opacity: 0.85;
}

.random-hero-arrow {
  font-size: var(--font-size-2xl);
  opacity: 0.7;
  flex-shrink: 0;
}

/* ---------- 퀴즈 그리드 ---------- */
.quiz-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 600px) {
  .quiz-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .quiz-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- 햄버거 메뉴 버튼 ---------- */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  color: var(--color-text-muted);
  margin-left: auto;
  align-items: center;
  justify-content: center;
}
.menu-toggle:hover { color: var(--color-primary); }

/* ---------- 모바일 슬라이드 패널 ---------- */
.mobile-panel {
  position: fixed;
  top: 0;
  right: -280px;
  width: 280px;
  height: 100vh;
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  padding: var(--space-2xl) var(--space-lg);
  transition: right 0.3s ease;
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  overflow-y: auto;
}

.mobile-panel.open { right: 0; }

.mobile-panel-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  padding: 4px;
  font-size: var(--font-size-xl);
}

.mobile-panel-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.mobile-panel-section-title {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-xs);
}

.mobile-panel .header-nav {
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-sm);
}

.mobile-panel .header-nav a {
  font-size: var(--font-size-base);
  font-weight: 600;
  padding: var(--space-sm) 0;
}

.mobile-panel-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 199;
  display: none;
}

.mobile-panel-overlay.open { display: block; }

/* ---------- 모바일 퍼스트 ---------- */
@media (max-width: 600px) {
  .menu-toggle { display: flex; }
  .header-nav { display: none; }
  .lang-select { display: none; }
  .mobile-panel { display: flex; }
  .mobile-panel .header-nav { display: flex; }
  .mobile-panel .lang-select { display: block; }
}

@media (max-width: 480px) {
  :root {
    --font-size-3xl: 1.75rem;
    --font-size-4xl: 2rem;
  }

  .hero.section {
    padding: var(--space-md) var(--space-sm);
  }

  .section {
    padding: var(--space-sm) 0;
  }
}