/* BYSTECH Design System — CSS Tokens & Global Styles */

@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css');
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ── 디자인 토큰 ─────────────────────────────────── */
:root {
  --navy-50:  #EEF3FA;
  --navy-100: #DCE8F5;
  --navy-200: #B9D2EC;
  --navy-400: #5A95D1;
  --navy-700: #234E7A;
  --navy-800: #1A3A5C;
  --navy-900: #112340;
  --navy-950: #0B1929;

  --cobalt-500: #2E6FE6;
  --cobalt-600: #1C5BD8;
  --cobalt-700: #1747B0;

  --gray-0:   #FFFFFF;
  --gray-50:  #F6F8FA;
  --gray-100: #EDEFF2;
  --gray-150: #E4E7EB;
  --gray-200: #D6DAE0;
  --gray-300: #B1B7BF;
  --gray-400: #8B939E;
  --gray-500: #6E7681;
  --gray-600: #4F5760;
  --gray-700: #353C44;
  --gray-800: #21272F;
  --gray-900: #161B22;

  --shadow-sm: 0 1px 3px rgba(11,25,41,0.08), 0 1px 2px rgba(11,25,41,0.04);
  --shadow-md: 0 4px 8px rgba(11,25,41,0.06), 0 2px 4px rgba(11,25,41,0.04);
  --shadow-lg: 0 12px 24px rgba(11,25,41,0.08), 0 4px 8px rgba(11,25,41,0.04);
  --shadow-focus: 0 0 0 3px rgba(28,91,216,0.25);

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --radius-xl: 14px;
  --radius-2xl: 20px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Pretendard', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--gray-900);
  background: var(--gray-0);
  -webkit-font-smoothing: antialiased;
}

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

/* ── 레이아웃 유틸 ───────────────────────────────── */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 96px 0; }
.section--alt { background: var(--gray-50); }
.section--dark { background: var(--navy-950); color: var(--gray-0); }

/* ── 타이포 ──────────────────────────────────────── */
.eyebrow {
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cobalt-600);
}

h1, h2, h3, h4 {
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.15;
  color: var(--navy-800);
}

h1 { font-size: clamp(36px, 5vw, 56px); }
h2 { font-size: clamp(28px, 3.5vw, 38px); }
h3 { font-size: 22px; }
h4 { font-size: 17px; font-weight: 700; }

p { color: var(--gray-600); line-height: 1.75; }

/* ── 버튼 ─────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-lg);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  cursor: pointer;
  border: none;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn--primary {
  background: var(--navy-800);
  color: var(--gray-0);
}
.btn--primary:hover { background: var(--navy-900); box-shadow: var(--shadow-md); }

.btn--cobalt {
  background: var(--cobalt-600);
  color: var(--gray-0);
}
.btn--cobalt:hover { background: var(--cobalt-700); box-shadow: var(--shadow-md); }

.btn--outline {
  background: transparent;
  color: var(--navy-800);
  border: 1.5px solid var(--gray-200);
}
.btn--outline:hover { border-color: var(--navy-400); background: var(--navy-50); }

.btn--lg { padding: 15px 32px; font-size: 15px; }
.btn--sm { padding: 8px 16px; font-size: 13px; }

/* ── 네비게이션 ──────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gray-150);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav__logo { display: flex; align-items: center; }
.nav__logo img { height: 36px; width: auto; }

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-600);
  transition: color 0.15s;
}
.nav__links a:hover,
.nav__links a.active { color: var(--navy-800); }

.nav__cta { display: flex; gap: 8px; }

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--navy-800);
  border-radius: 2px;
  transition: all 0.2s;
}

/* ── 히어로 ──────────────────────────────────────── */
.hero {
  padding: 96px 0 80px;
  background: linear-gradient(160deg, var(--navy-950) 0%, var(--navy-800) 60%, var(--navy-700) 100%);
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23FFFFFF' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
}

.hero__content { color: var(--gray-0); }
.hero__content .eyebrow { color: var(--cobalt-500); margin-bottom: 16px; }
.hero__content h1 { color: var(--gray-0); margin-bottom: 20px; }
.hero__content p { color: var(--navy-200); font-size: 17px; margin-bottom: 36px; max-width: 480px; }

.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero__actions .btn--outline {
  color: var(--gray-0);
  border-color: rgba(255,255,255,0.3);
}
.hero__actions .btn--outline:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.5);
}

.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* ── 카드 ─────────────────────────────────────────── */
.card {
  background: var(--gray-0);
  border: 1px solid var(--gray-150);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s, transform 0.2s;
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }

.card__body { padding: 28px; }
.card__footer { padding: 20px 28px; border-top: 1px solid var(--gray-100); background: var(--gray-50); }

/* ── 그리드 ──────────────────────────────────────── */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* ── 섹션 헤더 ───────────────────────────────────── */
.section-header { text-align: center; margin-bottom: 56px; }
.section-header .eyebrow { margin-bottom: 12px; }
.section-header h2 { margin-bottom: 16px; }
.section-header p { max-width: 560px; margin: 0 auto; font-size: 16px; }

/* ── 배지 ─────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 600;
}
.badge--navy { background: var(--navy-100); color: var(--navy-800); }
.badge--cobalt { background: #E2EBFD; color: var(--cobalt-700); }
.badge--gray { background: var(--gray-100); color: var(--gray-600); }

/* ── 제품 카드 ───────────────────────────────────── */
.product-card { position: relative; }
.product-card__tier {
  position: absolute;
  top: -1px;
  left: 28px;
  padding: 4px 14px;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.product-card__tier--standard { background: var(--navy-800); color: white; }
.product-card__tier--advanced { background: var(--cobalt-600); color: white; }
.product-card__tier--premium  { background: var(--navy-950); color: white; }

.product-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--navy-50);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.product-card__price {
  font-family: 'JetBrains Mono', monospace;
  font-size: 24px;
  font-weight: 700;
  color: var(--navy-800);
  margin: 12px 0 4px;
}

.product-card__price-note {
  font-size: 12px;
  color: var(--gray-400);
  margin-bottom: 20px;
}

.product-card__features {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.product-card__features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--gray-600);
}

.product-card__features li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cobalt-500);
  flex-shrink: 0;
}

/* ── 스텟 바 ─────────────────────────────────────── */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--gray-150);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--gray-0);
}

.stat-item {
  padding: 32px 24px;
  text-align: center;
  border-right: 1px solid var(--gray-150);
}
.stat-item:last-child { border-right: none; }

.stat-item__value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 36px;
  font-weight: 700;
  color: var(--navy-800);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-item__label {
  font-size: 13px;
  color: var(--gray-500);
}

/* ── 테이블 ──────────────────────────────────────── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-500);
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-150);
}

.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--gray-50); }
.data-table td.num {
  font-family: 'JetBrains Mono', monospace;
  text-align: right;
  font-size: 13px;
}

/* ── 문의 폼 ─────────────────────────────────────── */
.form-group { margin-bottom: 20px; }

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: 14px;
  font-family: inherit;
  color: var(--gray-900);
  background: var(--gray-0);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--cobalt-600);
  box-shadow: var(--shadow-focus);
}

.form-textarea { min-height: 140px; resize: vertical; }

/* ── CTA 배너 ─────────────────────────────────────── */
.cta-banner {
  background: linear-gradient(135deg, var(--navy-800) 0%, var(--cobalt-700) 100%);
  border-radius: var(--radius-2xl);
  padding: 64px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.cta-banner h2, .cta-banner p { color: var(--gray-0); }
.cta-banner p { color: var(--navy-200); margin-top: 8px; }
.cta-banner .btn--outline {
  color: var(--gray-0);
  border-color: rgba(255,255,255,0.4);
}
.cta-banner .btn--outline:hover { background: rgba(255,255,255,0.1); }

/* ── 푸터 ─────────────────────────────────────────── */
.footer {
  background: var(--navy-950);
  color: var(--gray-300);
  padding: 64px 0 32px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer__brand p {
  color: var(--gray-500);
  font-size: 13px;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 280px;
}

.footer__col h4 {
  color: var(--gray-0);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.footer__col ul { display: flex; flex-direction: column; gap: 10px; }
.footer__col ul a {
  font-size: 13px;
  color: var(--gray-500);
  transition: color 0.15s;
}
.footer__col ul a:hover { color: var(--gray-200); }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--gray-600);
}

/* ── 유틸리티 ────────────────────────────────────── */
.text-center { text-align: center; }
.mt-4  { margin-top: 16px; }
.mt-6  { margin-top: 24px; }
.mt-8  { margin-top: 32px; }
.mt-12 { margin-top: 48px; }
.mb-4  { margin-bottom: 16px; }
.mb-6  { margin-bottom: 24px; }
.mb-8  { margin-bottom: 32px; }
.gap-3 { gap: 12px; }
.flex  { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.w-full { width: 100%; }

/* ── 장비 아이콘 카드 ─────────────────────────────── */
.equip-card {
  background: var(--gray-0);
  border: 1px solid var(--gray-150);
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.equip-card__abbr {
  font-family: 'JetBrains Mono', monospace;
  font-size: 22px;
  font-weight: 700;
  color: var(--navy-800);
  margin-bottom: 4px;
}

.equip-card__name {
  font-size: 13px;
  color: var(--gray-500);
  margin-bottom: 12px;
}

.equip-card__brands {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* ── 모바일 반응형 ────────────────────────────────── */
@media (max-width: 768px) {
  .nav__links, .nav__cta { display: none; }
  .nav__hamburger { display: flex; }

  .hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .hero__visual { display: none; }
  .hero { padding: 64px 0 56px; }

  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }

  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .stat-item { border-right: none; border-bottom: 1px solid var(--gray-150); }
  .stat-item:nth-child(odd) { border-right: 1px solid var(--gray-150); }

  .cta-banner { flex-direction: column; padding: 40px 28px; }

  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
  .footer__bottom { flex-direction: column; gap: 8px; text-align: center; }

  .section { padding: 64px 0; }
  .container { padding: 0 16px; }
}

@media (max-width: 480px) {
  .stats-bar { grid-template-columns: 1fr; }
  .stat-item { border-right: none !important; }
  .footer__grid { grid-template-columns: 1fr; }
}