:root {
  --color-bg: #fafaf6;
  --color-bg-alt: #f1efe7;
  --color-bg-dark: #1a201c;
  --color-surface: #ffffff;
  --color-text: #14181a;
  --color-text-soft: #4a5048;
  --color-text-muted: #8a8a82;
  --color-line: #e3e1d4;
  --color-line-strong: #c9c6b6;
  --color-brand: #57926e;
  --color-brand-dark: #2d5740;
  --color-brand-soft: rgba(87, 146, 110, 0.08);
  --max-width: 1080px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --radius: 18px;
  --radius-sm: 10px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: 'Pretendard Variable', 'Pretendard', 'Apple SD Gothic Neo',
               'Noto Sans KR', 'Malgun Gothic', system-ui, -apple-system,
               'Segoe UI', sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

img, svg { display: block; }

::selection {
  background: var(--color-brand);
  color: #fff;
}

/* ===== Logo SVG sizing helper ===== */
.logo-svg {
  width: 100%;
  height: 100%;
  color: var(--color-brand);
}

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem var(--gutter);
  background: rgba(250, 250, 246, 0.78);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  letter-spacing: -0.01em;
}

.brand-mark {
  width: 14px;
  height: 50px;
  display: inline-block;
  flex-shrink: 0;
}

.brand-text {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text-kr {
  font-size: 1rem;
  font-weight: 700;
}

.brand-text-en {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  color: var(--color-text-muted);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.7rem, 2vw, 1.6rem);
  font-size: 0.92rem;
}

.site-nav a {
  color: var(--color-text-soft);
  font-weight: 500;
  position: relative;
  transition: color 0.15s var(--ease);
}

.site-nav a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  height: 1px;
  width: 100%;
  background: var(--color-brand-dark);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.site-nav a:not(.nav-cta):hover,
.site-nav a.is-active {
  color: var(--color-brand-dark);
}

.site-nav a:not(.nav-cta):hover::after,
.site-nav a.is-active::after {
  transform: scaleX(1);
}

.nav-cta {
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-brand-dark);
  border-radius: 999px;
  color: var(--color-brand-dark) !important;
  font-weight: 600;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.nav-cta:hover {
  background: var(--color-brand-dark);
  color: #fff !important;
}

@media (max-width: 640px) {
  .site-nav a:not(.nav-cta) { display: none; }
}

/* ===== HERO ===== */
.hero {
  position: relative;
  padding: clamp(4.5rem, 13vw, 9rem) var(--gutter) clamp(4rem, 10vw, 7rem);
  overflow: hidden;
}

.hero-deco {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(60% 50% at 88% 15%, rgba(87, 146, 110, 0.12), transparent 70%),
    radial-gradient(50% 40% at 8% 85%, rgba(87, 146, 110, 0.07), transparent 70%);
}

.hero-deco::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(20,24,26,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20,24,26,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, #000 25%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 25%, transparent 75%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero-logo {
  width: 38px;
  height: 140px;
  margin-bottom: 2.4rem;
  animation: rise 0.9s var(--ease) both;
}

.hero-eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-brand-dark);
  font-weight: 700;
  margin-bottom: 1.5rem;
  animation: rise 0.9s var(--ease) 0.1s both;
}

.hero-title {
  font-size: clamp(2.4rem, 7vw, 5rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  font-weight: 800;
  margin-bottom: 1.8rem;
}

.hero-line {
  display: block;
  animation: rise 1s var(--ease) both;
}

.hero-line:nth-child(1) { animation-delay: 0.2s; }
.hero-line:nth-child(2) { animation-delay: 0.35s; }

.hero-line-accent {
  color: var(--color-brand-dark);
  font-style: italic;
  font-weight: 700;
}

.hero-sub {
  font-size: clamp(1rem, 1.4vw, 1.18rem);
  color: var(--color-text-soft);
  max-width: 38rem;
  margin-bottom: 2.5rem;
  line-height: 1.75;
  animation: rise 1s var(--ease) 0.5s both;
}

.hero-cta {
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
  animation: rise 1s var(--ease) 0.65s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.15s var(--ease), background 0.2s var(--ease),
              color 0.2s var(--ease), border-color 0.2s var(--ease);
  cursor: pointer;
}

.btn-primary {
  background: var(--color-brand-dark);
  color: #fff;
}

.btn-primary:hover {
  background: #1f4030;
  transform: translateY(-1px);
}

.btn-primary .btn-arrow {
  display: inline-block;
  transition: transform 0.25s var(--ease);
}

.btn-primary:hover .btn-arrow {
  transform: translateX(4px);
}

.btn-ghost {
  border-color: var(--color-line-strong);
  color: var(--color-text-soft);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--color-brand);
  color: var(--color-brand-dark);
}

.hero-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.75rem;
  letter-spacing: 0.28em;
  color: var(--color-text-muted);
  text-transform: uppercase;
  animation: rise 1s var(--ease) 0.8s both;
}

.hero-meta-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-brand);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; transform: scale(0.9); }
  50%      { opacity: 1;   transform: scale(1.1); }
}

/* ===== SECTION COMMON ===== */
.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(4rem, 9vw, 6.5rem) var(--gutter);
}

.section-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-brand-dark);
  font-weight: 700;
  margin-bottom: 1.4rem;
}

.section-title {
  font-size: clamp(1.7rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: 3rem;
  max-width: 32rem;
}

/* ===== ABOUT ===== */
.about {
  background: linear-gradient(180deg, var(--color-bg-alt), var(--color-bg));
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.about-body {
  font-size: clamp(1.25rem, 2.2vw, 1.75rem);
  line-height: 1.6;
  letter-spacing: -0.015em;
  max-width: 50rem;
  color: var(--color-text);
  font-weight: 500;
}

.about-body em {
  font-style: italic;
  color: var(--color-brand-dark);
}

.about-body strong {
  font-weight: 700;
  background: linear-gradient(180deg, transparent 60%, var(--color-brand-soft) 60%);
}

.about-body .hanja {
  font-size: 0.85em;
  color: var(--color-text-muted);
  font-weight: 400;
  letter-spacing: 0.05em;
}

/* ===== PRINCIPLES ===== */
.principles {
  background: var(--color-bg);
}

.principle-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0;
  border-top: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
}

.principle {
  padding: 2rem 1.6rem;
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  transition: background 0.3s var(--ease);
}

.principle:hover {
  background: var(--color-brand-soft);
}

.principle-num {
  display: inline-block;
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 0.72rem;
  color: var(--color-brand-dark);
  letter-spacing: 0.18em;
  margin-bottom: 1rem;
  padding: 0.18rem 0.55rem;
  border: 1px solid var(--color-brand);
  border-radius: 999px;
}

.principle h3 {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 0.5rem;
}

.principle p {
  font-size: 0.95rem;
  color: var(--color-text-soft);
  line-height: 1.65;
}

/* ===== BUSINESS ===== */
.business {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-line);
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 1.4rem;
}

.business-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 2.2rem;
  transition: transform 0.25s var(--ease),
              box-shadow 0.25s var(--ease),
              border-color 0.25s var(--ease);
  position: relative;
  overflow: hidden;
}

.business-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-brand), var(--color-brand-dark));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}

.business-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-brand);
  box-shadow: 0 18px 40px -22px rgba(45, 87, 64, 0.4);
}

.business-card:hover::before {
  transform: scaleX(1);
}

.business-card-head {
  margin-bottom: 1.2rem;
}

.business-tag {
  display: inline-block;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  color: var(--color-brand-dark);
  margin-bottom: 0.7rem;
  text-transform: uppercase;
}

.business-card h3 {
  font-size: 1.55rem;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.business-card > p {
  color: var(--color-text-soft);
  margin-bottom: 1.4rem;
  font-size: 0.98rem;
}

.business-list {
  list-style: none;
  border-top: 1px dashed var(--color-line);
  padding-top: 1.1rem;
}

.business-list li {
  position: relative;
  padding-left: 1.3rem;
  color: var(--color-text);
  font-size: 0.93rem;
  margin-bottom: 0.5rem;
}

.business-list li:last-child { margin-bottom: 0; }

.business-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 8px;
  height: 1px;
  background: var(--color-brand);
}

/* ===== FOOTER (법인 정보 포함) ===== */
.site-footer {
  background: var(--color-bg-dark);
  color: #b8b9af;
  scroll-margin-top: 0;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(3.5rem, 8vw, 5.5rem) var(--gutter) 2rem;
}

.footer-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 2.2rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-brand);
  font-weight: 700;
}

.footer-brand-line {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #e3e1d4;
}

.footer-info {
  max-width: 760px;
  margin-bottom: 2.4rem;
}

.info-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 1rem;
  padding: 0.95rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  font-size: 0.95rem;
}

.info-row:last-child {
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.info-row dt {
  color: #8a8a82;
  font-weight: 500;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  padding-top: 0.12rem;
}

.info-row dd {
  color: #d6d4c6;
}

.info-row dd a {
  color: #a4d2b6;
  border-bottom: 1px solid rgba(164, 210, 182, 0.4);
  transition: color 0.15s, border-color 0.15s;
}

.info-row dd a:hover {
  color: #c5e6d2;
  border-color: #c5e6d2;
}

.footer-bottom {
  padding-top: 1.4rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-meta {
  font-size: 0.78rem;
  color: #6f6f68;
  letter-spacing: 0.03em;
}

@media (max-width: 540px) {
  .info-row {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }
}

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.85s var(--ease), transform 0.85s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}