/* ========================================
   디자인 토큰
======================================== */
:root {
  --bg-primary:    #080810;
  --bg-secondary:  #0d0d1a;
  --bg-card:       #111122;
  --bg-card-alt:   #161630;
  --text-primary:  #f0f0ff;
  --text-secondary:#8888aa;
  --text-muted:    #4a4a6a;
  --accent:        #00e5ff;
  --accent-2:      #7c3aed;
  --accent-glow:   rgba(0, 229, 255, 0.2);
  --accent-2-glow: rgba(124, 58, 237, 0.25);
  --kakao:         #ffeb00;
  --kakao-text:    #1a1000;
  --telegram:      #0088cc;
  --success:       #00ff88;
  --danger:        #ff3b6b;
  --border:        rgba(0, 229, 255, 0.08);
  --border-hover:  rgba(0, 229, 255, 0.35);
  --shadow-card:   0 4px 32px rgba(0, 0, 0, 0.6);
  --shadow-glow:   0 0 40px rgba(0, 229, 255, 0.12);
  --shadow-glow-2: 0 0 40px rgba(124, 58, 237, 0.18);
  --radius-sm:     8px;
  --radius-md:     16px;
  --radius-lg:     24px;
  --radius-full:   9999px;
  --gradient:      linear-gradient(135deg, #00e5ff, #7c3aed);
  --gradient-rev:  linear-gradient(135deg, #7c3aed, #00e5ff);
  --transition:    0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 70px;
  overflow-x: hidden;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Noto Sans KR', 'Segoe UI', sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ========================================
   공통 유틸
======================================== */
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cyan-glow {
  text-shadow: 0 0 40px rgba(0, 229, 255, 0.4);
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}
.section-header h2 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.6rem;
}
.section-header h2 .accent { color: var(--accent); }
.section-desc {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* 버튼 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 32px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.08);
  opacity: 0;
  transition: opacity var(--transition);
}
.btn:hover::after { opacity: 1; }
.btn:hover { transform: translateY(-3px); }
.btn:active { transform: translateY(0); }

.btn-kakao {
  background: var(--kakao);
  color: var(--kakao-text);
  box-shadow: 0 4px 20px rgba(255, 235, 0, 0.3);
}
.btn-kakao:hover { box-shadow: 0 8px 32px rgba(255, 235, 0, 0.5); }

.btn-telegram {
  background: var(--telegram);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0, 136, 204, 0.3);
}
.btn-telegram:hover { box-shadow: 0 8px 32px rgba(0, 136, 204, 0.5); }

/* 아웃라인 텔레그램 버튼 (히어로) */
.btn-telegram-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid rgba(255,255,255,0.25);
  box-shadow: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 32px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition), background var(--transition);
  white-space: nowrap;
}
.btn-telegram-outline:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
  background: rgba(0, 229, 255, 0.05);
}

.btn-lg { padding: 16px 48px; font-size: 1.1rem; }

/* 스크롤 fade-in */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   네비게이션
======================================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  background: transparent;
  transition: background var(--transition), backdrop-filter var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}
.navbar.scrolled {
  background: rgba(8, 8, 16, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
}

.nav-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo {
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}
.nav-logo span { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links li a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition), background var(--transition);
}
.nav-links li a:hover { color: var(--text-primary); background: rgba(0,229,255,0.06); }

.nav-cta {
  background: transparent !important;
  color: var(--accent) !important;
  border: 1.5px solid var(--accent) !important;
  padding: 7px 20px !important;
  border-radius: var(--radius-full) !important;
  font-weight: 700 !important;
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.12);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition) !important;
}
.nav-cta:hover {
  background: rgba(0, 229, 255, 0.08) !important;
  box-shadow: 0 0 28px rgba(0, 229, 255, 0.28) !important;
  transform: translateY(-2px) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 모바일 메뉴 */
.mobile-menu {
  position: fixed;
  top: 64px; left: 0; right: 0;
  z-index: 999;
  background: rgba(8, 8, 16, 0.97);
  backdrop-filter: blur(20px);
  padding: 16px 24px 24px;
  border-bottom: 1px solid var(--border);
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}
.mobile-menu ul { display: flex; flex-direction: column; gap: 4px; }
.mobile-menu li a {
  display: block;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition), background var(--transition);
}
.mobile-menu li a:hover { color: var(--text-primary); background: rgba(0,229,255,0.06); }
.mobile-kakao {
  background: var(--kakao) !important;
  color: var(--kakao-text) !important;
  font-weight: 700 !important;
  margin-top: 8px;
}
.mobile-telegram {
  background: var(--telegram) !important;
  color: #fff !important;
  font-weight: 700 !important;
}

/* ========================================
   히어로
======================================== */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 100px 40px 80px;
  overflow: hidden;
}

/* 배경 그리드 */
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 90% 80% at 50% 0%, black 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 0%, black 20%, transparent 80%);
}

/* 파티클 캔버스 */
.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  animation: float 10s ease-in-out infinite alternate;
}
.hero-glow--1 {
  width: 600px; height: 600px;
  background: rgba(124, 58, 237, 0.1);
  top: -200px; left: -200px;
}
.hero-glow--2 {
  width: 500px; height: 500px;
  background: rgba(0, 229, 255, 0.07);
  bottom: -200px; right: -150px;
  animation-delay: 5s;
}

@keyframes float {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(30px, 40px) scale(1.08); }
}

/* 히어로 투컬럼 레이아웃 */
.hero-layout {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1200px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
}

/* 히어로 왼쪽 */
.hero-left {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.hero-badge {
  display: inline-block;
  background: var(--danger);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 1.4rem;
  letter-spacing: 0.02em;
  width: fit-content;
  box-shadow: 0 4px 16px rgba(255, 59, 107, 0.4);
  animation: badgePulse 3s ease-in-out infinite;
}

@keyframes badgePulse {
  0%, 100% { box-shadow: 0 4px 16px rgba(255, 59, 107, 0.4); }
  50%       { box-shadow: 0 4px 28px rgba(255, 59, 107, 0.7); }
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 1.2rem;
}

.hero-title .gradient-text {
  display: block;
  background: linear-gradient(90deg, #00e5ff, #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 20px rgba(0, 229, 255, 0.35));
}

.hero-desc {
  font-size: clamp(0.95rem, 2vw, 1.05rem);
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 2.2rem;
}
.hero-desc strong { color: var(--text-primary); }

.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

/* 히어로 통계 바 */
.hero-stats {
  display: flex;
  align-items: center;
  border: 1px solid rgba(0, 229, 255, 0.12);
  border-radius: var(--radius-md);
  background: rgba(0, 229, 255, 0.03);
  backdrop-filter: blur(8px);
  padding: 18px 24px;
  gap: 0;
}

.stat {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 16px;
}
.stat:first-child { padding-left: 0; }

.stat-cat {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.stat-value {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-primary);
  white-space: nowrap;
}

.stat-vline {
  width: 1px;
  height: 36px;
  background: rgba(0, 229, 255, 0.15);
  flex-shrink: 0;
}

/* ========================================
   히어로 오른쪽 — 모니터 부팅 애니메이션
======================================== */
.hero-right {
  display: flex;
  align-items: center;
  justify-content: center;
}

.monitor-wrap {
  position: relative;
  animation: monitorFloat 5s ease-in-out infinite alternate;
}
@keyframes monitorFloat {
  from { transform: translateY(0px); }
  to   { transform: translateY(-14px); }
}

/* 모니터 본체 */
.monitor {
  position: relative;
  width: 320px;
}

/* 화면 */
.monitor-screen {
  width: 100%;
  aspect-ratio: 16 / 10;
  background: #000;
  border-radius: 12px 12px 0 0;
  border: 3px solid #1e1e2e;
  border-bottom: none;
  position: relative;
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(0,229,255,0.15),
    0 0 60px rgba(0,229,255,0.12),
    inset 0 0 40px rgba(0,0,0,0.8);
}

/* 부팅 스캔라인 */
.boot-scanline {
  position: absolute;
  left: 0; right: 0;
  height: 3px;
  background: rgba(0,229,255,0.7);
  box-shadow: 0 0 12px rgba(0,229,255,0.9), 0 0 24px rgba(0,229,255,0.4);
  top: -4px;
  animation: scanDown 0.8s ease-in 0.3s forwards;
  z-index: 3;
}
@keyframes scanDown {
  0%   { top: -4px; }
  100% { top: 105%; }
}

/* 부팅 후 화면 내용 */
.boot-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  opacity: 0;
  animation: screenOn 0.4s ease-out 1.1s forwards;
}
@keyframes screenOn {
  0%   { opacity: 0; }
  100% { opacity: 1; }
}

/* NANO 로고 텍스트 */
.boot-logo {
  font-size: 3.8rem;
  font-weight: 900;
  letter-spacing: 0.18em;
  color: var(--accent);
  text-shadow:
    0 0 20px rgba(0,229,255,0.9),
    0 0 60px rgba(0,229,255,0.4);
  animation: logoGlow 2.5s ease-in-out 1.5s infinite alternate;
}
@keyframes logoGlow {
  from { text-shadow: 0 0 20px rgba(0,229,255,0.9), 0 0 60px rgba(0,229,255,0.4); }
  to   { text-shadow: 0 0 30px rgba(0,229,255,1),   0 0 90px rgba(0,229,255,0.7); }
}

.boot-sub {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  color: rgba(0,229,255,0.6);
  text-transform: uppercase;
}

/* 커서 깜빡임 */
.boot-cursor {
  width: 10px; height: 2px;
  background: var(--accent);
  margin-top: 8px;
  animation: cursorBlink 1s step-end 1.5s infinite;
  box-shadow: 0 0 8px var(--accent);
}
@keyframes cursorBlink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* 화면 스캔라인 텍스처 */
.screen-glow {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(0,0,0,0.08) 3px,
    rgba(0,0,0,0.08) 4px
  );
  pointer-events: none;
  z-index: 2;
}

/* 모니터 하단 베젤 */
.monitor-bezel-bottom {
  width: 100%;
  height: 14px;
  background: linear-gradient(180deg, #1a1a2e, #14142a);
  border: 3px solid #1e1e2e;
  border-top: none;
  border-radius: 0 0 6px 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.monitor-bezel-bottom::after {
  content: '';
  width: 40px; height: 4px;
  border-radius: 2px;
  background: #2a2a40;
}

/* 스탠드 목 */
.monitor-neck {
  width: 18px; height: 28px;
  background: linear-gradient(90deg, #16162a, #1e1e36, #16162a);
  margin: 0 auto;
}

/* 스탠드 받침 */
.monitor-base {
  width: 130px; height: 10px;
  background: linear-gradient(180deg, #1e1e36, #14142a);
  border-radius: 0 0 8px 8px;
  margin: 0 auto;
  border: 2px solid #1e1e2e;
  border-top: none;
}

/* 바닥 그림자 */
.monitor-shadow {
  width: 180px; height: 16px;
  background: radial-gradient(ellipse, rgba(0,229,255,0.15) 0%, transparent 70%);
  margin: 6px auto 0;
}

/* 히어로 스크롤 화살표 */
.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  animation: bounce 2s ease-in-out infinite;
  transition: color var(--transition);
  border: 1px solid rgba(0,229,255,0.15);
  border-radius: 50%;
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-scroll:hover {
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 16px rgba(0,229,255,0.2);
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* ========================================
   프로모 배너 (마퀴)
======================================== */
.promo-banner {
  background: linear-gradient(90deg, #0a0a18, #111128, #0a0a18);
  border-top: 1px solid rgba(0,229,255,0.1);
  border-bottom: 1px solid rgba(0,229,255,0.1);
  overflow: hidden;
  padding: 11px 0;
  position: relative;
}
.promo-banner::before,
.promo-banner::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  width: 80px;
  z-index: 1;
}
.promo-banner::before {
  left: 0;
  background: linear-gradient(90deg, #0a0a18, transparent);
}
.promo-banner::after {
  right: 0;
  background: linear-gradient(-90deg, #0a0a18, transparent);
}

.promo-track {
  display: flex;
  gap: 0;
  white-space: nowrap;
  animation: marquee 30s linear infinite;
}
.promo-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0 48px;
  flex-shrink: 0;
}
.promo-item::before {
  content: '//';
  color: var(--accent);
  font-weight: 700;
  opacity: 0.5;
}
.promo-item strong { color: var(--accent); font-weight: 700; }

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ========================================
   섹션 공통 레이아웃
======================================== */
.features,
.pricing,
.gallery,
.faq {
  padding: 90px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

/* 섹션 구분선 — section-line span으로 처리 */

/* ========================================
   임대 옵션
======================================== */
.options {
  padding: 90px 40px 60px;
  max-width: 1600px;
  margin: 0 auto;
}

/* ── options-grid ── */
.options-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
  width: 100%;
}

/* ── Option Card (oc) ── */
.oc {
  position: relative;
  background: #0b0b17;
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 20px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.35s cubic-bezier(.22,.68,0,1.2),
              box-shadow 0.35s ease,
              border-color 0.35s ease;
}
.oc:hover {
  transform: translateY(-6px);
  border-color: var(--tc);
  box-shadow: 0 20px 60px rgba(0,0,0,0.6), 0 0 0 1px var(--tc), 0 0 30px var(--tc-dim);
}

/* tier accent colours */
.oc[data-tier="low"]  { --tc: #4ade80; --tc-dim: rgba(74,222,128,0.1); }
.oc[data-tier="mid"]  { --tc: #38bdf8; --tc-dim: rgba(56,189,248,0.1); }
.oc[data-tier="high"] { --tc: #a78bfa; --tc-dim: rgba(167,139,250,0.1); }
.oc[data-tier="best"] { --tc: #f59e0b; --tc-dim: rgba(245,158,11,0.13); }

/* top accent line */
.oc-stripe {
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, var(--tc), transparent);
  box-shadow: 0 0 10px var(--tc);
  flex-shrink: 0;
}

/* big background number */
.oc-index {
  position: absolute;
  bottom: 80px; right: 12px;
  font-size: 7rem;
  font-weight: 900;
  color: rgba(255,255,255,0.025);
  line-height: 1;
  pointer-events: none;
  z-index: 0;
  letter-spacing: -0.04em;
}

/* BEST badge */
.oc-best-badge {
  position: absolute;
  top: 16px; right: 16px;
  background: var(--tc);
  color: #000;
  font-size: 0.62rem;
  font-weight: 900;
  padding: 4px 11px;
  border-radius: 4px;
  letter-spacing: 0.12em;
  z-index: 10;
  box-shadow: 0 0 16px var(--tc);
}

/* image area */
.oc-img-wrap {
  position: relative;
  overflow: hidden;
  height: 190px;
  flex-shrink: 0;
  background: #080810;
}
.oc-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}
.oc:hover .oc-img { transform: scale(1.04); }
.oc-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom,
    rgba(0,0,0,0.08) 0%,
    transparent 40%,
    #0b0b17 100%);
  pointer-events: none;
}

/* body */
.oc-body {
  padding: 16px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
  position: relative;
  z-index: 1;
}

/* tier + cpu header */
.oc-header {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.oc-tier-tag {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--tc);
  background: var(--tc-dim);
  border: 1px solid var(--tc);
  padding: 3px 10px;
  border-radius: 4px;
}
.oc-cpu {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--tc);
  letter-spacing: -0.01em;
  line-height: 1.2;
  text-shadow: 0 0 8px var(--tc), 0 0 20px var(--tc);
}

/* spec list */
.oc-specs {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.oc-spec-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
}
.oc-spec-key {
  color: rgba(255,255,255,0.35);
  min-width: 52px;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
}
.oc-spec-val {
  color: rgba(255,255,255,0.85);
  font-weight: 600;
}

/* use-case chips */
.oc-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.oc-chips span {
  font-size: 0.67rem;
  color: var(--tc);
  background: var(--tc-dim);
  border: 1px solid color-mix(in srgb, var(--tc) 40%, transparent);
  padding: 3px 9px;
  border-radius: 4px;
  font-weight: 500;
}

/* perf bar */
.oc-perf-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}
.oc-perf-track {
  flex: 1;
  height: 5px;
  background: rgba(255,255,255,0.06);
  border-radius: 3px;
  overflow: hidden;
}
.oc-perf-fill {
  height: 100%;
  width: var(--perf);
  background: linear-gradient(90deg, var(--tc), color-mix(in srgb, var(--tc) 50%, #fff));
  border-radius: 3px;
  box-shadow: 0 0 8px var(--tc);
  transition: width 1.2s ease 0.4s;
}
.oc-perf-label {
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--tc);
  min-width: 30px;
  text-align: right;
}

/* divider */
.oc-divider {
  height: 1px;
  background: rgba(255,255,255,0.06);
}

/* stock row */
.oc-stock {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--tc-dim);
  border: 1px solid color-mix(in srgb, var(--tc) 25%, transparent);
  border-radius: 10px;
  padding: 10px 14px;
}
.oc-stock-dot { display: flex; align-items: center; }
.oc-stock-text {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.4);
  flex: 1;
}
.oc-stock-count {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--tc);
  text-shadow: 0 0 12px var(--tc);
  line-height: 1;
}
.oc-stock-unit {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.3);
  align-self: flex-end;
  margin-bottom: 2px;
}

/* CTA button */
.oc-btn {
  display: block;
  text-align: center;
  background: var(--tc-dim);
  border: 1px solid var(--tc);
  color: var(--tc);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 11px;
  border-radius: 10px;
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  margin-top: auto;
}
.oc-btn:hover {
  background: var(--tc);
  color: #000;
  box-shadow: 0 0 20px var(--tc);
}

/* legacy count class (used by JS) */
.count {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--accent);
  text-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
}
.stock-status {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.pulse-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  position: relative;
}
.pulse-dot::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: var(--success);
  opacity: 0.4;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.4; }
  50%       { transform: scale(2); opacity: 0; }
}

.options-cta {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

/* ========================================
   서비스 특징
======================================== */
.features {
  background: linear-gradient(180deg, transparent, rgba(0, 229, 255, 0.02) 50%, transparent);
  max-width: 100%;
  padding-left: 0;
  padding-right: 0;
}
.features > .section-header,
.features > .features-grid {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}
.features > .features-grid { margin-bottom: 0; padding-bottom: 0; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}
.feature-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 229, 255, 0.2);
  box-shadow: 0 16px 40px rgba(0, 229, 255, 0.08);
}
.feature-card:hover::after { transform: scaleX(1); }

.feature-icon {
  width: 60px; height: 60px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,229,255,0.06);
  border: 1px solid rgba(0,229,255,0.12);
  border-radius: var(--radius-md);
  color: var(--accent);
}
.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}
.feature-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ========================================
   가격표
======================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card);
  border-color: rgba(0, 229, 255, 0.2);
}

.pricing-card--featured {
  background: linear-gradient(160deg, #151530, #111128);
  border-color: rgba(0, 229, 255, 0.3);
  box-shadow: 0 0 0 1px rgba(0, 229, 255, 0.1), 0 8px 40px rgba(0, 229, 255, 0.08);
}
.pricing-card--featured:hover {
  box-shadow: 0 0 0 1px rgba(0, 229, 255, 0.2), 0 16px 60px rgba(0, 229, 255, 0.15);
}

/* 요금 카드 상단 티어 컬러 바 */
.pricing-tier-bar {
  height: 4px;
  border-radius: 4px 4px 0 0;
  position: absolute;
  top: 0; left: 0; right: 0;
}
.tier-low-bar  { background: linear-gradient(90deg, #64b4ff, #3a8fe8); }
.tier-mid-bar  { background: linear-gradient(90deg, #00e5ff, #7c3aed); }
.tier-high-bar { background: linear-gradient(90deg, #7c3aed, #b48eff); }

.pricing-tag {
  position: absolute;
  top: -14px; left: 50%;
  transform: translateX(-50%);
  background: var(--gradient);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 20px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
}
.pricing-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}
.pricing-spec {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 24px;
  padding: 6px 12px;
  background: rgba(0, 229, 255, 0.06);
  border: 1px solid rgba(0, 229, 255, 0.1);
  border-radius: var(--radius-sm);
  display: inline-block;
}
.pricing-features {
  text-align: left;
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.pricing-features li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding-left: 22px;
  position: relative;
}
.pricing-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* ========================================
   갤러리
======================================== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.gallery-grid img {
  width: 100%;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid var(--border);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  aspect-ratio: 16/10;
  object-fit: cover;
}
.gallery-grid img:hover {
  transform: scale(1.02);
  border-color: rgba(0, 229, 255, 0.3);
  box-shadow: 0 8px 32px rgba(0, 229, 255, 0.12);
}

/* ========================================
   FAQ
======================================== */
.faq-container {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item { position: relative; }

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  text-align: left;
  transition: background var(--transition), border-color var(--transition);
}
.faq-question:hover {
  background: var(--bg-card-alt);
  border-color: rgba(0, 229, 255, 0.2);
}
.faq-item.active .faq-question {
  background: var(--bg-card-alt);
  border-color: rgba(0, 229, 255, 0.3);
  border-bottom-color: transparent;
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

.faq-icon {
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform var(--transition), color var(--transition);
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--accent);
}

.faq-answer {
  background: var(--bg-card-alt);
  border: 1px solid rgba(0, 229, 255, 0.2);
  border-top: none;
  border-bottom-left-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}
.faq-answer[hidden] { display: block; }
.faq-item.active .faq-answer { max-height: 300px; padding: 20px 24px; }
.faq-answer p { color: var(--text-secondary); line-height: 1.7; }

/* ========================================
   이미지 오버레이
======================================== */
#overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  cursor: pointer;
  backdrop-filter: blur(12px);
}
#overlay.show { display: flex; }

.overlay-close {
  position: absolute;
  top: 20px; right: 24px;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.25);
  border-radius: 50%;
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #fff;
  transition: background var(--transition), box-shadow var(--transition);
}
.overlay-close:hover {
  background: rgba(0, 229, 255, 0.2);
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.3);
}

#overlay-img {
  max-width: 90%;
  max-height: 88vh;
  border-radius: var(--radius-md);
  box-shadow: 0 16px 80px rgba(0, 0, 0, 0.9), 0 0 40px rgba(0, 229, 255, 0.1);
  cursor: default;
}

/* ========================================
   플로팅 버튼
======================================== */
.floating-buttons {
  position: fixed;
  right: 20px;
  bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 100;
}

.floating-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  transition: transform var(--transition), box-shadow var(--transition);
}
.floating-btn:hover { transform: translateY(-4px); }
.floating-btn span { font-size: 0.8rem; }

.floating-kakao {
  background: var(--kakao);
  color: var(--kakao-text);
  box-shadow: 0 4px 20px rgba(255, 235, 0, 0.3);
}
.floating-kakao:hover { box-shadow: 0 8px 28px rgba(255, 235, 0, 0.45); }
.floating-telegram {
  background: var(--telegram);
  box-shadow: 0 4px 20px rgba(0, 136, 204, 0.3);
}
.floating-telegram:hover { box-shadow: 0 8px 28px rgba(0, 136, 204, 0.45); }

/* ========================================
   푸터
======================================== */
.footer {
  background: #040408;
  border-top: 1px solid var(--border);
  padding: 40px 24px;
  text-align: center;
}
.footer-inner {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.footer-brand {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent);
  text-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
}
.footer-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.8;
}
.footer-info strong { color: var(--text-secondary); }
.footer-contact {
  display: flex;
  align-items: center;
  gap: 12px;
}
.footer-contact a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.footer-contact a:hover { color: var(--accent); }
.footer-contact span { color: var(--text-muted); }
.footer-copy {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ========================================
   하단 섹션 공통: 배경 데코
======================================== */

/* 옵션 섹션 배경 */
.options {
  position: relative;
}
.options::before {
  content: '';
  position: absolute;
  top: 0; left: 50%; transform: translateX(-50%);
  width: 600px; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,229,255,0.3), transparent);
}

/* 피처 섹션 */
.features {
  position: relative;
}
.features::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 20% 50%, rgba(0,229,255,0.03) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 50%, rgba(124,58,237,0.03) 0%, transparent 70%);
  pointer-events: none;
}

/* 가격 섹션 배경 */
.pricing {
  position: relative;
}
.pricing::before {
  content: '';
  position: absolute;
  top: 0; left: 50%; transform: translateX(-50%);
  width: 600px; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(124,58,237,0.3), transparent);
}

/* ========================================
   섹션 헤더 타이틀 언더라인 애니메이션
======================================== */
.section-header {
  position: relative;
}
.section-header h2 {
  position: relative;
  display: inline-block;
}

/* fade-in 진입 시 제목 아래 라인 확장 */
.section-header.visible .section-line {
  transform: scaleX(1);
}
.section-line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.3s;
  margin-top: 6px;
  border-radius: 2px;
}

/* ========================================
   옵션 카드: 호버 shimmer + 코너
======================================== */
.option-card {
  position: relative;
}
.option-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(
    105deg,
    transparent 30%,
    rgba(0,229,255,0.06) 50%,
    transparent 70%
  );
  background-size: 200% 100%;
  background-position: 200% 0;
  transition: background-position 0.6s ease;
  pointer-events: none;
}
.option-card:hover::after {
  background-position: -100% 0;
}

/* 옵션 카드 정보 영역 */
.option-info {
  padding: 12px 4px 10px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}
.option-name {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-primary);
}
.option-specs {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* 사양 배지 */
.option-tier-badge {
  position: absolute;
  top: 12px; left: 12px;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
}
.tier-low  { background: rgba(100,180,255,0.15); color: #64b4ff; border: 1px solid rgba(100,180,255,0.3); }
.tier-mid  { background: rgba(0,229,255,0.15);   color: var(--accent); border: 1px solid rgba(0,229,255,0.3); }
.tier-high { background: rgba(124,58,237,0.15);  color: #b48eff; border: 1px solid rgba(124,58,237,0.3); }

/* stock-box 숫자 강조 */
.count {
  position: relative;
  display: inline-block;
}

/* ========================================
   피처 카드: 아이콘 호버 애니메이션
======================================== */
.feature-icon {
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), filter 0.3s ease;
}
.feature-card:hover .feature-icon {
  transform: scale(1.25) translateY(-4px);
  filter: drop-shadow(0 4px 12px rgba(0,229,255,0.3));
}

/* 피처 카드 진입 애니메이션 - 순서별 방향 */
.feature-card:nth-child(1),
.feature-card:nth-child(4) { --slide-x: -20px; }
.feature-card:nth-child(2),
.feature-card:nth-child(5) { --slide-x: 0px; }
.feature-card:nth-child(3),
.feature-card:nth-child(6) { --slide-x: 20px; }

.feature-card.fade-in {
  transform: translateX(var(--slide-x, 0px)) translateY(20px);
}
.feature-card.fade-in.visible {
  transform: translateX(0) translateY(0);
}

/* 요금제 featured — 심플 글로우만 유지 */

/* ========================================
   갤러리: 이미지 오버레이 효과
======================================== */
.gallery-grid img {
  position: relative;
}
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.gallery-item::after {
  content: '확대 보기';
  position: absolute;
  inset: 0;
  background: rgba(0,229,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  opacity: 0;
  transition: opacity var(--transition);
  backdrop-filter: blur(2px);
}
.gallery-item:hover {
  border-color: rgba(0,229,255,0.3);
  box-shadow: 0 8px 32px rgba(0,229,255,0.12);
}
.gallery-item:hover::after { opacity: 1; }
.gallery-item img {
  width: 100%;
  display: block;
  aspect-ratio: 16/10;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.gallery-item:hover img { transform: scale(1.04); }

/* ========================================
   FAQ: 왼쪽 액센트 라인
======================================== */
.faq-item.active .faq-question::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--gradient);
  border-radius: 2px 0 0 2px;
}
.faq-question { position: relative; overflow: hidden; }

/* FAQ 진입 애니메이션 */
.faq-item.fade-in {
  transform: translateX(-16px) translateY(0);
}
.faq-item.fade-in.visible {
  transform: translateX(0) translateY(0);
}

/* ========================================
   반응형
======================================== */
@media (max-width: 1024px) {
  .hero-layout { gap: 32px; }
  .monitor { width: 280px; }

  .options-grid { grid-template-columns: repeat(4, 1fr); gap: 16px; width: 100%; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: none; }

  .hero { padding: 90px 20px 70px; }
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-right { order: -1; }
  .monitor { width: 260px; }
  .boot-logo { font-size: 3rem; }

  .hero-stats { padding: 14px 16px; }
  .stat { padding: 0 10px; }
  .stat-value { font-size: 0.88rem; }

  .options-grid { grid-template-columns: 1fr; max-width: 420px; margin-left: auto; margin-right: auto; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; }
  .gallery-grid { grid-template-columns: 1fr; max-width: 480px; margin-left: auto; margin-right: auto; }

  .options, .features > .section-header, .features > .features-grid,
  .pricing, .gallery, .faq { padding-left: 16px; padding-right: 16px; }
  .options, .features, .pricing, .gallery, .faq { padding-top: 64px; padding-bottom: 64px; }
}

@media (max-width: 480px) {
  .hero-title { letter-spacing: -0.02em; }
  .hero-stats { flex-direction: column; gap: 12px; align-items: flex-start; }
  .stat-vline { width: 60px; height: 1px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn,
  .hero-actions .btn-telegram-outline { width: 100%; text-align: center; justify-content: center; }
  .features-grid { grid-template-columns: 1fr; }
  .options-cta { flex-direction: column; align-items: center; }
  .options-cta .btn { width: 100%; max-width: 360px; }
  .floating-btn span { display: none; }
  .floating-btn { padding: 12px; }
}