/* =====================================================================
   COPIOS — private wealth, midnight navy & champagne gold
   Type system: Pretendard (gothic) — hierarchy by weight contrast
   ===================================================================== */
:root {
  /* color */
  --navy: #101c30;
  --navy-2: #17263e;
  --paper: #f4f3ee;
  --card: #fbfaf7;
  --ink: #1a2130;
  --stone: #545b69;
  --gold: #ab7f22;
  --gold-soft: #e6c97a;
  --line: #e3e0d6;
  --line-dark: rgba(230, 201, 122, 0.25);

  /* type scale */
  --fs-hero: clamp(2.75rem, 6.5vw, 4.5rem);
  --fs-h2: clamp(1.85rem, 4vw, 2.7rem);
  --fs-h3: clamp(1.3rem, 2.5vw, 1.6rem);
  --fs-quote: clamp(1.35rem, 3vw, 1.95rem);
  --fs-lede: clamp(1.05rem, 1.9vw, 1.2rem);
  --fs-body: 1.0625rem;   /* 17px */
  --fs-small: 0.9rem;
  --fs-caption: 0.78rem;

  /* leading */
  --lh-display: 1.12;
  --lh-heading: 1.32;
  --lh-sub: 1.45;
  --lh-body: 1.85;
  --lh-quote: 1.8;

  /* tracking */
  --ls-display: -0.025em;  /* gothic display */
  --ls-kr: -0.01em;        /* korean running text */
  --ls-caps: 0.18em;       /* uppercase latin labels */
  --ls-kr-label: 0.06em;   /* korean labels */

  /* rhythm */
  --sp-section: clamp(6rem, 11vw, 8.25rem);
  --header-h: 76px;
  --sans: "Pretendard Variable", Pretendard, "Apple SD Gothic Neo",
    "Noto Sans KR", "Malgun Gothic", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
  -webkit-text-size-adjust: 100%;
  /* 스크롤바 숨김 (휠·터치·키보드 스크롤은 그대로 동작) */
  scrollbar-width: none;
  -ms-overflow-style: none;
}
html::-webkit-scrollbar { width: 0; height: 0; display: none; }

body {
  font-family: var(--sans);
  font-size: var(--fs-body);
  background: var(--paper);
  color: var(--ink);
  line-height: var(--lh-body);
  letter-spacing: var(--ls-kr);
  word-break: keep-all;
  line-break: strict;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

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

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.wrap { width: min(1100px, 100% - 48px); margin-inline: auto; }

/* ===== Type helpers ===== */
.eyebrow {
  font-size: var(--fs-caption);
  font-weight: 700;
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 18px;
}
.eyebrow-dark { color: var(--gold-soft); }

.title-display {
  font-weight: 900;
  font-size: var(--fs-h2);
  line-height: var(--lh-heading);
  letter-spacing: var(--ls-display);
  text-wrap: balance;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(16, 28, 48, 0.84);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(230, 201, 122, 0.14);
  transition: border-color 0.25s, box-shadow 0.25s;
}
.site-header.scrolled {
  border-bottom-color: rgba(230, 201, 122, 0.3);
  box-shadow: 0 10px 28px -18px rgba(0, 0, 0, 0.45);
}

.header-inner {
  height: var(--header-h);
  width: min(1180px, 100% - 48px);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand-name {
  color: #f1f2f0;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.24em;
  margin-right: -0.24em; /* optical: cancel trailing tracking */
}

.nav-desktop { display: flex; align-items: center; gap: 36px; }
.nav-desktop a {
  position: relative;
  padding: 6px 0;
  color: #c7cdd8;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav-desktop a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--gold-soft);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.nav-desktop a:hover, .nav-desktop a.active { color: var(--gold-soft); }
.nav-desktop a:hover::after, .nav-desktop a.active::after { transform: scaleX(1); }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 7px;
  padding: 10px 4px;
  background: none;
  border: 0;
  cursor: pointer;
}
.menu-toggle span {
  width: 26px; height: 2px;
  background: #f1f2f0;
  transition: transform 0.25s;
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { transform: translateY(-4.5px) rotate(-45deg); }

.nav-mobile {
  display: none;
  flex-direction: column;
  background: var(--navy);
  border-bottom: 1px solid var(--line-dark);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.nav-mobile.open { max-height: 360px; }
.nav-mobile a {
  color: #e7e9ee;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: var(--fs-small);
  padding: 15px 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}
.nav-mobile a:first-child { border-top: 0; margin-top: 6px; }
.nav-mobile a:last-child { margin-bottom: 14px; }

/* ===== Hero ===== */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(1000px 540px at 80% -12%, rgba(230, 201, 122, 0.14), transparent 65%),
    radial-gradient(700px 420px at 6% 112%, rgba(230, 201, 122, 0.06), transparent 60%),
    linear-gradient(175deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #f1f2f0;
  padding: calc(var(--header-h) + clamp(5.5rem, 10vw, 7.5rem)) 24px clamp(6.5rem, 11vw, 8.5rem);
  text-align: center;
}
.hero::before {
  content: "";
  position: absolute;
  right: -14vmin;
  top: 50%;
  transform: translateY(-50%);
  width: 78vmin;
  height: 78vmin;
  background: url("../assets/logo.png") center / contain no-repeat;
  filter: invert(1);
  mix-blend-mode: screen;
  opacity: 0.05;
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; }
.hero-eyebrow {
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--gold-soft);
  margin-bottom: 32px;
}
.hero-title {
  font-weight: 900;
  font-size: var(--fs-hero);
  line-height: var(--lh-display);
  letter-spacing: var(--ls-display);
  text-wrap: balance;
}
.hero-rule {
  width: 64px; height: 1px;
  margin: clamp(2.25rem, 5vw, 3rem) auto;
  background: linear-gradient(90deg, transparent, var(--gold-soft), transparent);
}
.hero-lede {
  font-size: var(--fs-lede);
  line-height: 1.95;
  color: #c7cdd8;
  max-width: 40em;
  margin-inline: auto;
  margin-bottom: 52px;
}
.hero-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 14px 34px;
  border-radius: 999px;
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.03em;
  transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.15s;
}
.btn:active { transform: scale(0.97); }
.btn-gold {
  background: var(--gold-soft);
  color: #14202f;
}
.btn-gold:hover { background: #f0d78f; }
.btn-line {
  border: 1px solid rgba(241, 242, 240, 0.35);
  color: #f1f2f0;
}
.btn-line:hover { border-color: var(--gold-soft); color: var(--gold-soft); }

/* ===== Philosophy ===== */
.philosophy { padding: var(--sp-section) 0; }
.section-head { max-width: 720px; margin-bottom: clamp(3rem, 6vw, 4rem); }

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.pillar {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 42px 36px 38px;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.35s, border-color 0.35s;
}
.pillar:hover {
  transform: translateY(-5px);
  border-color: rgba(171, 127, 34, 0.35);
  box-shadow: 0 18px 44px -18px rgba(16, 28, 48, 0.22);
}
.philosophy-grid .pillar:nth-child(2) { transition-delay: 0.08s; }
.philosophy-grid .pillar:nth-child(3) { transition-delay: 0.16s; }
.philosophy-grid .pillar.visible { transition-delay: 0s; }
.philosophy-grid .pillar:nth-child(2).visible { transition-delay: 0.08s; }
.philosophy-grid .pillar:nth-child(3).visible { transition-delay: 0.16s; }
.pillar-mark {
  display: block;
  color: var(--gold);
  font-size: 1.4rem;
  line-height: 1;
  margin-bottom: 26px;
}
.pillar h3 {
  font-size: var(--fs-h3);
  font-weight: 800;
  line-height: var(--lh-sub);
  letter-spacing: var(--ls-display);
  margin-bottom: 16px;
}
.pillar p {
  color: var(--stone);
  font-size: var(--fs-small);
  line-height: 1.8;
}

.philosophy-note {
  margin-top: clamp(3.5rem, 7vw, 4.5rem);
  padding-top: clamp(2.5rem, 5vw, 3rem);
  border-top: 1px solid var(--line);
  text-align: center;
  font-weight: 500;
  font-size: clamp(1.1rem, 2.3vw, 1.35rem);
  line-height: 1.95;
  letter-spacing: var(--ls-kr);
  color: var(--ink);
}

/* ===== Brand Identity ===== */
.identity {
  background: var(--card);
  border-block: 1px solid var(--line);
  padding: var(--sp-section) 0;
}
.identity-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 80px;
  align-items: center;
}
.identity-visual { display: grid; place-items: center; }
.emblem-ring {
  position: relative;
  padding: 10px;
  border-radius: 50%;
  border: 1px solid rgba(171, 127, 34, 0.3);
  outline: 1px solid var(--line);
  outline-offset: 7px;
  background: #fff;
  box-shadow: 0 24px 60px -30px rgba(16, 28, 48, 0.35);
}
.emblem-ring img { width: min(320px, 60vw); border-radius: 50%; }

.identity-copy .title-display { margin-bottom: 32px; }
.identity-body {
  display: grid;
  gap: 22px;
  color: var(--stone);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
}

/* ===== Business ===== */
.business { padding: var(--sp-section) 0; }
.business-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 80px;
  align-items: start;
}
.business-head { position: sticky; top: calc(var(--header-h) + 40px); }
.business-head .title-display { margin-bottom: 24px; }

.business-list { display: grid; }
.biz {
  display: grid;
  gap: 14px;
  padding: clamp(2.5rem, 5vw, 3rem) 0;
  border-top: 1px solid var(--line);
}
.biz-title h3 { transition: color 0.25s; }
.biz:hover .biz-title h3 { color: var(--gold); }
.biz:last-child { border-bottom: 1px solid var(--line); }
.biz-title h3 {
  font-size: var(--fs-h3);
  font-weight: 800;
  line-height: var(--lh-sub);
  letter-spacing: var(--ls-display);
}
.biz-kr {
  color: var(--gold);
  font-size: var(--fs-caption);
  font-weight: 700;
  letter-spacing: var(--ls-kr-label);
  margin-top: 8px;
}
.biz-desc {
  color: var(--stone);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  max-width: 36em;
}

/* ===== CEO Message ===== */
.message {
  background:
    radial-gradient(800px 420px at 50% -20%, rgba(230, 201, 122, 0.09), transparent 65%),
    linear-gradient(180deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #f1f2f0;
  padding: var(--sp-section) 0;
  text-align: center;
}
.message-inner { max-width: 780px; }
.message-quote {
  font-size: var(--fs-quote);
  font-weight: 700;
  line-height: var(--lh-quote);
  letter-spacing: var(--ls-kr);
  display: grid;
  gap: 36px;
  text-wrap: balance;
}
.message-sign {
  margin-top: clamp(4rem, 8vw, 5.5rem);
  display: grid;
  gap: 8px;
}
.message-sign strong {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--gold-soft);
}
.message-sign span {
  font-size: var(--fs-caption);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: #8f97a8;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--navy);
  color: #b3bac7;
  padding: clamp(4.5rem, 9vw, 5.75rem) 0 56px;
  font-variant-numeric: tabular-nums;
}
.footer-top {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 60px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: #f1f2f0;
  margin-bottom: 8px;
}
.footer-tag {
  font-size: var(--fs-small);
  font-style: italic;
  color: #848da0;
}

.footer-info {
  align-self: center;
  font-size: var(--fs-small);
  line-height: 2.1;
  color: #c7cdd8;
}
.footer-info span { display: block; }
.footer-info span:not(.footer-corp)::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--gold-soft);
  margin-right: 10px;
  vertical-align: 2px;
}
.footer-corp { font-weight: 700; color: #f1f2f0; }

.footer-disclaimer {
  margin-top: 44px;
  padding: 20px 26px;
  border: 1px solid rgba(230, 201, 122, 0.30);
  font-size: var(--fs-small);
  line-height: 1.8;
  color: #c7cdd8;
}
.footer-copy {
  margin-top: 36px;
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  color: #6f7889;
}

/* ===== Emphasis ===== */
strong { font-weight: 800; }
.hero-lede strong { color: #f1f2f0; font-weight: 700; }
.philosophy-note strong { font-weight: 800; }
.identity-body strong { color: var(--ink); font-weight: 700; }
.message-quote strong { color: var(--gold-soft); font-weight: 800; }

/* ===== Reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .nav-mobile { transition: none; }
}

/* ===== Responsive ===== */
.br-wide { display: inline; }
.br-narrow { display: none; }

@media (max-width: 960px) {
  .business-grid { grid-template-columns: 1fr; gap: 34px; }
  .business-head { position: static; }
  .identity-grid { grid-template-columns: 1fr; gap: 60px; text-align: center; }
  .philosophy-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 44px; }
}

@media (max-width: 720px) {
  .nav-desktop { display: none; }
  .menu-toggle { display: flex; }
  .nav-mobile { display: flex; }
  .brand-name { font-size: 1.2rem; }
  .br-wide { display: none; }
  .br-narrow { display: inline; }
}

/* ===== Modal ===== */
.pw-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(10, 16, 28, 0.72);
  backdrop-filter: blur(6px);
}
.pw-modal[hidden] { display: none; }
.pw-box {
  width: min(380px, 100%);
  background: var(--card);
  border: 1px solid var(--line);
  padding: 36px 32px 32px;
  text-align: center;
}
.pw-title {
  font-weight: 900;
  font-size: 1.3rem;
  letter-spacing: var(--ls-display);
  margin-bottom: 6px;
}
.pw-desc {
  color: var(--stone);
  font-size: var(--fs-small);
  margin-bottom: 22px;
}
.pw-box input {
  width: 100%;
  font: inherit;
  text-align: center;
  letter-spacing: 0.2em;
  padding: 12px 14px;
  border: 1.5px solid var(--line);
  border-radius: 8px;
  outline: none;
  background: #fff;
  transition: border-color 0.15s;
}
.pw-box input:focus { border-color: var(--gold); }
.pw-error {
  color: #b3401e;
  font-size: 0.82rem;
  margin-top: 10px;
}
.pw-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 22px;
}
.pw-actions .btn { padding: 11px 26px; border: 0; cursor: pointer; font: inherit; font-weight: 700; font-size: var(--fs-small); }
.pw-cancel {
  padding: 11px 26px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: none;
  color: var(--stone);
  font: inherit;
  font-weight: 700;
  font-size: var(--fs-small);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.pw-cancel:hover { border-color: var(--stone); color: var(--ink); }

.lib-box { width: min(440px, 100%); }
.lib-list {
  list-style: none;
  margin: 0;
  padding: 0;
  text-align: left;
  border-top: 1px solid var(--line);
}
.lib-item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  width: 100%;
  padding: 18px 6px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: none;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.15s;
}
.lib-item:hover,
.lib-item:focus-visible { background: rgba(178, 141, 76, 0.07); outline: none; }
.lib-no {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.06em;
}
.lib-text { display: block; }
.lib-name {
  display: block;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: var(--ls-display);
}
.lib-desc {
  display: block;
  margin-top: 3px;
  font-size: 0.8rem;
  color: var(--stone);
}

/* ===== Overlay frame ===== */
.deck {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(1000px 600px at 70% -10%, rgba(230, 201, 122, 0.10), transparent 65%),
    linear-gradient(175deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #f1f2f0;
}
.deck[hidden] { display: none; }
.deck-frame {
  flex: 1;
  width: 100%;
  border: 0;
  background: #fff;
}