/* ==========================================================================
   RelayNovel - Core Design System & Global Styles
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+KR:wght@300;400;600;700&family=Pretendard:wght@300;400;500;600;700;800&display=swap');

:root {
  /* 라이트 모드 (Warm Literary Paper) */
  --bg-main: #FBF9F5;
  --bg-surface: #FFFFFF;
  --bg-surface-elevated: #FFFFFF;
  --bg-subtle: #F3EFEA;
  --bg-hover: #EBE5DC;
  
  --color-primary: #1E293B;
  --color-primary-light: #334155;
  --color-accent: #D97706;
  --color-accent-hover: #B45309;
  --color-accent-subtle: #FEF3C7;
  
  --text-main: #1C1917;
  --text-secondary: #4B5563;
  --text-muted: #6B7280;
  --text-inverse: #FFFFFF;
  
  --border-color: #E7E2D9;
  --border-focus: #D97706;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 14px rgba(44, 38, 28, 0.07);
  --shadow-lg: 0 10px 25px rgba(44, 38, 28, 0.12);
  
  --font-ui: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-story: 'Noto Serif KR', Georgia, 'KoPubWorld Batang', serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  --transition-fast: 0.18s ease;
  --transition-normal: 0.28s ease;
}

/* 원고지 세피아 테마 */
[data-theme="sepia"] {
  --bg-main: #F4ECD8;
  --bg-surface: #FAF4E6;
  --bg-surface-elevated: #FFFDF9;
  --bg-subtle: #ECE1C7;
  --bg-hover: #E4D6B6;
  
  --color-primary: #3B2A1A;
  --color-primary-light: #523D29;
  --color-accent: #C25E00;
  --color-accent-hover: #A04A00;
  --color-accent-subtle: #F6E2BC;
  
  --text-main: #2E2214;
  --text-secondary: #58442F;
  --text-muted: #826B52;
  --text-inverse: #FFFFFF;
  
  --border-color: #E2D3B3;
  --border-focus: #C25E00;

  --shadow-sm: 0 1px 3px rgba(60, 40, 20, 0.06);
  --shadow-md: 0 4px 14px rgba(60, 40, 20, 0.09);
  --shadow-lg: 0 10px 25px rgba(60, 40, 20, 0.14);
}

/* 다크 모드 */
[data-theme="dark"] {
  --bg-main: #121417;
  --bg-surface: #1C1F24;
  --bg-surface-elevated: #242930;
  --bg-subtle: #2A303A;
  --bg-hover: #343C49;
  
  --color-primary: #94A3B8;
  --color-primary-light: #CBD5E1;
  --color-accent: #F59E0B;
  --color-accent-hover: #D97706;
  --color-accent-subtle: #3D2D10;
  
  --text-main: #F1F5F9;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --text-inverse: #0F172A;
  
  --border-color: #2D333D;
  --border-focus: #F59E0B;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.6);
}

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

body {
  font-family: var(--font-ui);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  -webkit-font-smoothing: antialiased;
}

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

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  outline: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header & GNB */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.5px;
  flex-shrink: 0;
}

.logo-icon {
  font-size: 1.5rem;
}

.logo-badge {
  font-size: 0.7rem;
  font-weight: 600;
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  letter-spacing: 0;
}

.header-center {
  flex: 1;
  max-width: 400px;
  margin: 0 12px;
}

.search-box {
  position: relative;
  width: 100%;
}

.search-box input {
  width: 100%;
  padding: 8px 14px 8px 36px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background-color: var(--bg-subtle);
  color: var(--text-main);
  font-size: 0.88rem;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.search-box input:focus {
  border-color: var(--border-focus);
  background-color: var(--bg-surface);
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.9rem;
  pointer-events: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 닉네임 프로필 뱃지 */
.nickname-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px 5px 6px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.nickname-pill:hover {
  background-color: var(--bg-hover);
  border-color: var(--color-accent);
}

.user-avatar-mini {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: #FFFFFF;
}

/* 테마 선택 토글 드롭다운/버튼 */
.theme-selector {
  display: flex;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
}

.theme-btn {
  padding: 4px 8px;
  font-size: 0.82rem;
  border-radius: var(--radius-full);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: all var(--transition-fast);
}

.theme-btn.active {
  background: var(--bg-surface);
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
}

/* Hero Section */
.hero-section {
  padding: 36px 0 24px;
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-main) 100%);
  border-bottom: 1px solid var(--border-color);
}

.hero-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.hero-text h1 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.25;
  margin-bottom: 10px;
  letter-spacing: -0.5px;
}

.hero-text p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 580px;
}

.hero-stats {
  display: flex;
  gap: 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 14px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.stat-item {
  text-align: center;
}

.stat-val {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-accent);
}

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

/* Navigation & Controls */
.feed-controls {
  padding: 24px 0 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.genre-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}

.genre-tabs::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  padding: 7px 14px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  background-color: var(--bg-subtle);
  color: var(--text-main);
}

.tab-btn.active {
  background-color: var(--color-primary);
  color: var(--text-inverse);
  border-color: var(--color-primary);
  font-weight: 600;
}

.sort-and-filters {
  display: flex;
  align-items: center;
  gap: 10px;
}

.custom-select {
  padding: 7px 12px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--text-main);
  cursor: pointer;
}

/* Feed Grid */
.novel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  padding: 12px 0 60px;
}

/* Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  padding: 28px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-links {
  display: flex;
  gap: 16px;
}

.footer-links a:hover, .footer-links button:hover {
  color: var(--color-accent);
}

/* Responsive */
@media (max-width: 768px) {
  .hero-content {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-text h1 {
    font-size: 1.5rem;
  }
  .hero-stats {
    width: 100%;
    justify-content: space-around;
  }
  .header-center {
    display: none;
  }
  .header-inner {
    height: 58px;
  }
  .novel-grid {
    grid-template-columns: 1fr;
  }
}