/* ============================================================
   AntiFake Demo — 전시 웹사이트 스타일
   ============================================================ */

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

:root {
  --primary:       #4F46E5;
  --primary-light: #818CF8;
  --primary-dark:  #3730A3;
  --accent:        #06B6D4;
  --danger:        #EF4444;
  --success:       #10B981;
  --warning:       #F59E0B;

  --bg:            #FFFFFF;
  --bg-soft:       #F8FAFC;
  --bg-card:       #FFFFFF;
  --hero-bg-from:  #0F0E2A;
  --hero-bg-to:    #1E1B5C;

  --text:          #1E293B;
  --text-muted:    #64748B;
  --text-light:    #94A3B8;
  --border:        #E2E8F0;

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg:  0 20px 40px rgba(0,0,0,0.10), 0 8px 16px rgba(0,0,0,0.06);
  --shadow-xl:  0 32px 64px rgba(0,0,0,0.14);

  --radius-sm:  8px;
  --radius:     16px;
  --radius-lg:  24px;
  --radius-full: 9999px;

  --font: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html, body {
  height: 100%;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── 네비게이션 ── */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  transition: background var(--transition), backdrop-filter var(--transition), border-color var(--transition);
}

#nav.hero-mode {
  background: transparent;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

#nav.page-mode {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--primary);
}

#nav.hero-mode .nav-logo { color: #fff; }

.nav-center {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-dots {
  display: flex;
  gap: 8px;
}

.page-dot {
  height: 30px;
  padding: 0 14px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font);
  transition: all var(--transition);
  white-space: nowrap;
}

#nav.hero-mode .page-dot {
  background: transparent;
  color: rgba(255,255,255,0.45);
}
#nav.hero-mode .page-dot:hover {
  color: rgba(255,255,255,0.8);
}
#nav.hero-mode .page-dot.active {
  background: rgba(255,255,255,0.15);
  color: #fff;
}
#nav.page-mode .page-dot {
  background: transparent;
  color: var(--text-muted);
}
#nav.page-mode .page-dot:hover {
  color: var(--text);
}
#nav.page-mode .page-dot.active {
  background: var(--primary);
  color: #fff;
}

.nav-spacer {
  min-width: 80px;
}

.nav-arrows {
  display: flex;
  gap: 8px;
}

.nav-btn {
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all var(--transition);
}

#nav.hero-mode .nav-btn {
  background: rgba(255,255,255,0.12);
  color: #fff;
}
#nav.hero-mode .nav-btn:hover {
  background: rgba(255,255,255,0.22);
}
#nav.page-mode .nav-btn {
  background: var(--bg-soft);
  color: var(--text);
}
#nav.page-mode .nav-btn:hover {
  background: var(--border);
}
.nav-btn:disabled {
  opacity: 0.3;
  cursor: default;
}

/* ── 페이지 컨테이너 ── */
#pages {
  width: 100%;
  height: 100vh;
  position: relative;
  overflow: hidden;
}

.page {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
  transition: opacity var(--transition), transform var(--transition);
  overflow-y: auto;
}

.page.active {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.page.exit {
  opacity: 0;
  transform: translateY(-16px);
  pointer-events: none;
}

/* ── PAGE 1: 히어로 ── */
#page-1 {
  background: linear-gradient(135deg, var(--hero-bg-from) 0%, var(--hero-bg-to) 60%, #4338CA 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.25;
  pointer-events: none;
}
.orb-1 {
  width: 500px; height: 500px;
  background: var(--primary);
  top: -100px; left: -100px;
}
.orb-2 {
  width: 400px; height: 400px;
  background: var(--accent);
  bottom: -80px; right: -80px;
}
.orb-3 {
  width: 300px; height: 300px;
  background: #7C3AED;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
  padding: 80px 32px 32px;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: var(--radius-full);
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  margin-bottom: 28px;
  letter-spacing: 0.02em;
}

.hero-title {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(64px, 10vw, 112px);
  font-weight: 900;
  color: #fff;
  line-height: 1;
  letter-spacing: -3px;
  margin-bottom: 20px;
  padding-bottom: 0.15em;
  background: linear-gradient(135deg, #fff 40%, var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(18px, 2.5vw, 24px);
  color: rgba(255,255,255,0.85);
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 12px;
}

.hero-tagline {
  font-size: 15px;
  font-weight: 500;
  color: rgba(255,255,255,0.55);
  margin-bottom: 48px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 8px 32px rgba(79,70,229,0.45);
}
.hero-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(79,70,229,0.55);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.3);
  font-size: 13px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

/* 히어로 진입 애니메이션 */
.hero-badge    { animation: fadeUp 0.9s ease both 0.1s; }
.hero-title    { animation: fadeUp 0.9s ease both 0.3s; }
.hero-subtitle { animation: fadeUp 0.9s ease both 0.5s; }
.hero-tagline  { animation: fadeUp 0.9s ease both 0.65s; }
.hero-cta      { animation: fadeUp 0.9s ease both 0.8s; }
@keyframes fadeUpHint {
  from { opacity: 0; transform: translateX(-50%) translateY(16px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}
.hero-scroll-hint {
  animation: fadeUpHint 0.9s ease both 1s, bounce 2s 2s infinite;
}

/* ── 페이지 진입 애니메이션 ── */
.page.animate-in .page-inner > * {
  animation: fadeUp 0.55s cubic-bezier(0.4, 0, 0.2, 1) both;
}
.page.animate-in .page-inner > *:nth-child(1) { animation-delay: 0.05s; }
.page.animate-in .page-inner > *:nth-child(2) { animation-delay: 0.18s; }
.page.animate-in .page-inner > *:nth-child(3) { animation-delay: 0.30s; }
.page.animate-in .page-inner > *:nth-child(4) { animation-delay: 0.42s; }

/* ── PAGE 공통 레이아웃 ── */
.page-inner {
  min-height: 100vh;
  padding: 80px 48px 48px;
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 40px;
}

.page-header {
  text-align: center;
}

.page-eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}

.page-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text);
  margin-bottom: 10px;
}

.page-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 560px;
  margin: 0 auto;
}

/* ── PAGE 2: 기술 소개 ── */
.tech-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tech-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  overflow: hidden;
}
.tech-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.tc-danger::before  { background: linear-gradient(90deg, #EF4444, #F97316); }
.tc-warning::before { background: linear-gradient(90deg, #F59E0B, #EAB308); }
.tc-success::before { background: linear-gradient(90deg, #10B981, #06B6D4); }

.tech-card:hover {
  transform: translateY(-4px);
}

.tech-card-num {
  position: absolute;
  top: 20px; right: 24px;
  font-size: 13px;
  font-weight: 800;
  font-family: 'Montserrat', sans-serif;
  letter-spacing: 0.05em;
  color: var(--border);
}

.tech-icon {
  width: 56px; height: 56px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  box-shadow: var(--shadow-sm);
}
.tech-icon.danger  { background: linear-gradient(135deg, #FEF2F2, #FFE4E4); }
.tech-icon.warning { background: linear-gradient(135deg, #FFFBEB, #FEF3C7); }
.tech-icon.success { background: linear-gradient(135deg, #ECFDF5, #D1FAE5); }

.tech-card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.3px;
}

.tech-card-body {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
}

/* 흐름 다이어그램 */
.flow-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.flow-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.2px;
}
.flow-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 18px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  flex-shrink: 0;
}
.flow-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border), transparent);
}

.flow-diagram {
  position: relative;
  padding: 8px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}

.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 24px 26px;
  border-radius: var(--radius);
  background: #fff;
  border: 1.5px solid var(--border);
  box-shadow: var(--shadow-md);
  text-align: center;
  min-width: 148px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.flow-step:hover {
  transform: translateY(-3px);
}

.flow-step-icon { font-size: 32px; }
.flow-step-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.2px;
}
.flow-step-sub {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

.flow-step.highlight-green {
  border-color: #10B981;
  background: #F0FDF8;
  box-shadow: var(--shadow-md);
}
.flow-step.highlight-green:hover {
  box-shadow: var(--shadow-md);
}
.flow-step.highlight-green .flow-step-label { color: #059669; }

.flow-step.highlight-red {
  border-color: #EF4444;
  background: #FFF8F8;
  box-shadow: var(--shadow-md);
}
.flow-step.highlight-red:hover {
  box-shadow: var(--shadow-md);
}
.flow-step.highlight-red .flow-step-label { color: #DC2626; }

.flow-arrow {
  color: var(--text-light);
  padding: 0 4px;
  flex-shrink: 0;
}

/* ── 화자 선택 탭 ── */
.speaker-selector {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.speaker-selector-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

.speaker-tab {
  flex-shrink: 0;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  border: 2px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font);
  transition: all var(--transition);
}
.speaker-tab:hover {
  border-color: var(--primary-light);
  color: var(--primary);
}
.speaker-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.speaker-tab.hidden-vip { display: none; }

/* ── 오디오 플레이어 ── */
.player-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: stretch;
}

.player-grid-4 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 20px;
}

.audio-player {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}
.audio-player:hover { box-shadow: var(--shadow-md); }

.player-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.player-meta { display: flex; flex-direction: column; gap: 4px; }

.player-type-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.badge-source    { background: #EFF6FF; color: #2563EB; }
.badge-protected { background: #ECFDF5; color: #059669; }
.badge-tts-orig  { background: #FEF3C7; color: #D97706; }
.badge-tts-prot  { background: #F0FDF4; color: #16A34A; }

.player-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

.player-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

.player-status {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  white-space: nowrap;
  flex-shrink: 0;
}
.status-idle     { background: var(--bg-soft); color: var(--text-muted); }
.status-playing  { background: #EFF6FF; color: var(--primary); }
.status-paused   { background: #FEF3C7; color: var(--warning); }
.status-ended    { background: #ECFDF5; color: var(--success); }
.status-error    { background: #FEF2F2; color: var(--danger); }

.player-controls {
  display: flex;
  align-items: center;
  gap: 14px;
}

.play-btn {
  flex-shrink: 0;
  width: 48px; height: 48px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all var(--transition);
  color: #fff;
}
.play-btn.btn-source    { background: linear-gradient(135deg, #2563EB, #4F46E5); }
.play-btn.btn-protected { background: linear-gradient(135deg, #2563EB, #4F46E5); }
.play-btn.btn-tts-orig  { background: linear-gradient(135deg, #2563EB, #4F46E5); }
.play-btn.btn-tts-prot  { background: linear-gradient(135deg, #2563EB, #4F46E5); }

.play-btn:hover { transform: scale(1.08); box-shadow: 0 4px 16px rgba(0,0,0,0.18); }
.play-btn:active { transform: scale(0.96); }

.play-btn svg { pointer-events: none; }

.progress-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.progress-bar {
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--border);
  cursor: pointer;
  position: relative;
}

.progress-fill {
  position: absolute;
  top: 0; left: 0;
  height: 100%;
  width: 0%;
  border-radius: var(--radius-full);
  pointer-events: none;
}

.fill-source,
.fill-protected,
.fill-tts-orig,
.fill-tts-prot  { background: linear-gradient(90deg, var(--primary-dark), var(--primary)); }

.time-display {
  font-size: 12px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  display: flex;
  justify-content: space-between;
}

/* ── 비교 페이지 (Page 5) 강조 레이블 ── */
.compare-section-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  grid-column: 1 / -1;
  margin-top: 4px;
}
.compare-section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* 비교 페이지 컨테이너 */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ── 화살표 구분선 (Page 3/4) ── */
.vs-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: 0.05em;
}
.vs-icon {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--bg-soft);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

/* ── 스크롤바 ── */
.page::-webkit-scrollbar { width: 5px; }
.page::-webkit-scrollbar-track { background: transparent; }
.page::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* ── 하단 네비게이션 ── */
#bottom-nav {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ── 키보드 힌트 ── */
.side-click {
  position: fixed;
  top: 64px;
  bottom: 0;
  width: 80px;
  z-index: 40;
  cursor: pointer;
}
.side-left  { left: 0; }
.side-right { right: 0; }
.kbd {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 11px;
  font-family: monospace;
  color: var(--text-muted);
}