/* EastSea — site v2 "Tide Tables" R3
   Font: EB Garamond Italic 24 KB (EN display h1 only).
   Body/headings: system Korean stack — Apple SD Gothic Neo / Noto Sans KR / system-ui.
   No CDN, no third-party requests at runtime, no build step.
   Palette: parchment cream #f5f0e8 / deep-sea navy #0e1929 / gold #c9962e / teal #0d6e6a.
   WCAG AA throughout. */

/* ---------- 0 · Fonts ---------- */
/* Pretendard removed (1.5 MB) — audience is Apple silicon Mac users,
   system Korean stack renders beautifully without custom fonts.
   Only EB Garamond Italic (24 KB) is loaded for the EN display h1. */

@font-face {
  font-family: 'EBGaramond';
  src: url('fonts/EBGaramond-Italic.woff2') format('woff2');
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

/* ---------- 1 · Design tokens ---------- */

:root {
  /* Tide Tables — light */
  --bg:        #f5f0e8;   /* old parchment */
  --bg-raise:  #fdfaf4;
  --tint:      #eae5d9;
  --ink:       #16293a;   /* 11.4:1 on --bg */
  --ink-soft:  #4a5c6e;   /* 5.4:1 on --bg */
  --line:      #d4ccb6;

  /* Hero panel */
  --navy:      #0e1929;
  --navy-mid:  #152236;
  --hero-ink:  #eef4f8;   /* 13.2:1 on --navy */
  --hero-soft: #a8c0d0;   /* 4.6:1 on --navy */

  /* 3-token accents */
  --gold:      #c9962e;
  --teal:      #0d6e6a;
  --amber:     #e2a94f;

  --coin-rim:  #a06818;
  --gold-ink:  #7a5410;   /* 4.8:1 on --bg */
  --btn-gold:  #d4a038;
  --btn-ink:   #1b2c3d;   /* 10.6:1 on --btn-gold */
  --focus:     #0d6e6a;

  --shadow-sm: 0 1px 3px rgba(18,40,58,.07), 0 4px 14px rgba(18,40,58,.05);
  --shadow:    0 2px 6px rgba(18,40,58,.09), 0 14px 36px rgba(18,40,58,.08);

  --gutter: 16px;
  --maxw:   68rem;

  /* System Korean + Latin — no @font-face download, zero extra KB */
  --font-body: 'Apple SD Gothic Neo', 'AppleSDGothicNeo', 'Noto Sans KR',
               'Malgun Gothic', system-ui, -apple-system, sans-serif;

  /* EB Garamond italic — EN h1 only */
  --font-en-display: 'EBGaramond', Georgia, 'Times New Roman', serif;

  /* legacy alias for inline SVG brand-mark */
  --navy-deep: #0e1929;
}

/* Dark mode tokens */
@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #0b1622;
    --bg-raise:  #111f2e;
    --tint:      #0d1b27;
    --ink:       #dce8f0;
    --ink-soft:  #7a9ab0;
    --line:      #1e3244;

    --navy:      #070e18;
    --navy-mid:  #0e1929;
    --hero-ink:  #e9eef4;
    --hero-soft: #8dafc3;

    --gold:      #e2a94f;
    --teal:      #6fcfc5;
    --amber:     #f0d080;

    --coin-rim:  #a67718;
    --gold-ink:  #e5b566;
    --btn-gold:  #e2a94f;
    --btn-ink:   #0b1622;
    --focus:     #e2a94f;

    --shadow-sm: 0 1px 3px rgba(0,0,0,.5), 0 4px 14px rgba(0,0,0,.4);
    --shadow:    0 2px 6px rgba(0,0,0,.5), 0 14px 36px rgba(0,0,0,.42);
  }
}

:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"]  { color-scheme: dark; }

/* ---------- 2 · Base ---------- */

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.68;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; }

/* Korean word-break: keep syllable blocks intact, balance line lengths */
h1, h2, h3 {
  line-height: 1.2;
  margin: 0 0 .5em;
  font-family: var(--font-body);
  font-weight: 700;
  letter-spacing: -.02em;
  word-break: keep-all;
  overflow-wrap: anywhere;
  text-wrap: balance;
}

h2 { font-size: clamp(1.55rem, 1rem + 2.6vw, 2.4rem); }
h3 { font-size: 1.08rem; }

p {
  margin: 0 0 1em;
  word-break: keep-all;
  overflow-wrap: anywhere;
  text-wrap: pretty;
}

a { color: var(--teal); text-underline-offset: 3px; }
a:hover { color: var(--gold-ink); }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 3 · Bilingual switching ---------- */

html:lang(ko) .en { display: none; }
html:lang(en) .ko { display: none; }

/* ---------- 4 · Focus & skip link ---------- */

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip {
  position: absolute; left: var(--gutter); top: -3.5rem; z-index: 50;
  padding: .6rem 1rem; background: var(--bg-raise); color: var(--ink);
  border: 2px solid var(--focus); border-radius: 8px;
  font-weight: 600; text-decoration: none;
  transition: top .15s ease-out;
}
.skip:focus { top: .75rem; }

/* ---------- 5 · Header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; min-height: 3.5rem;
}

.brand {
  display: inline-flex; align-items: center; gap: .55rem;
  text-decoration: none; color: var(--ink);
}
.brand-mark { width: 30px; height: 30px; flex: none; }
.brand-name { font-weight: 800; font-size: 1.08rem; letter-spacing: -.01em; }
.brand-name em {
  font-style: normal; font-weight: 600;
  color: var(--ink-soft); margin-left: .4rem; font-size: .92em;
}

#lang-toggle {
  font: inherit; font-weight: 700; font-size: .85rem;
  color: var(--ink); background: var(--bg-raise);
  border: 1.5px solid var(--line); border-radius: 999px;
  padding: .32rem .95rem; min-width: 3.4rem; cursor: pointer;
}
#lang-toggle:hover { border-color: var(--focus); color: var(--teal); }

/* ---------- 6 · Hero ---------- */

.hero {
  position: relative;
  overflow: visible; /* coin can overlap wave divider */
  background: var(--navy);
  color: var(--hero-ink);
}

/* Warm amber ambient glow behind coin */
.hero::before {
  content: '';
  position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(
    ellipse 60% 80% at 68% 40%,
    rgba(201,150,46,.16) 0%,
    rgba(201,150,46,.05) 50%,
    transparent 72%
  );
  pointer-events: none;
}

/* Mobile default: flex-column, coin above headline via order: -1 */
.hero-grid {
  position: relative; z-index: 2;
  display: flex;
  flex-direction: column;
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(5rem, 12vw, 9rem);
}

/* hero-art order: -1 puts coin before copy in DOM-visual order on mobile */
.hero-art {
  order: -1;
  position: relative;
  display: flex; align-items: center; justify-content: center;
  z-index: 4;
  padding-top: .4rem;
  padding-bottom: 2rem;
}

.hero-kicker {
  color: rgba(111,207,197,.9);
  font-weight: 700; font-size: .76rem;
  letter-spacing: .11em; text-transform: uppercase;
  margin-bottom: 1.2rem;
  word-break: keep-all;
}

/* EB Garamond italic for English display headline */
html:lang(en) #hero-title {
  font-family: var(--font-en-display);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -.01em;
  word-break: normal; /* EN: normal word-break */
  text-wrap: balance;
}

.hero h1 {
  font-size: clamp(2rem, 1.1rem + 5.5vw, 3.9rem);
  margin-bottom: 1.1rem;
  color: var(--hero-ink);
}

.hero-lead {
  max-width: 33rem;
  color: var(--hero-soft);
  font-size: clamp(1rem, .95rem + .5vw, 1.11rem);
  line-height: 1.74;
  margin-bottom: 1.5rem;
}

.hero-status {
  display: inline-block;
  padding: .46rem .9rem;
  border: 1px solid rgba(111,207,197,.3);
  border-left: 3px solid rgba(226,169,79,.7);
  border-radius: 8px;
  background: rgba(7,14,24,.32);
  color: rgba(238,244,248,.82);
  font-size: .81rem;
  font-weight: 600;
  margin-bottom: 1.8rem;
  word-break: keep-all;
}

.hero-cta { display: flex; flex-wrap: wrap; gap: .7rem; margin: 0; }

/* ---------- 7 · Coin image ---------- */

.coin-img {
  display: block;
  position: relative; z-index: 2;
  /* 360px: 78vw centred; 640px: 50vw; 900px+: up to 520px */
  width: clamp(14rem, 78vw, 32.5rem);
  height: auto;
  /* Bright warm gold glow — no darkening filter */
  filter:
    drop-shadow(0 0 48px rgba(240,200,90,.6))
    drop-shadow(0 8px 28px rgba(201,150,46,.5))
    drop-shadow(0 24px 64px rgba(201,150,46,.25))
    drop-shadow(0 4px 10px rgba(7,14,24,.4));
}

/* Ambient radial glow behind coin */
.coin-glow {
  position: absolute;
  width: 90%; aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(240,215,110,.24) 0%,
    rgba(201,150,46,.1)   45%,
    transparent           72%
  );
  z-index: 1;
  pointer-events: none;
}

/* Wave divider — lower z-index so coin can overlap */
.hero-waves {
  position: absolute; left: 0; right: 0; bottom: -1px;
  width: 100%; height: clamp(4rem, 11vw, 9rem);
  z-index: 2;
  display: block;
}

.hero-waves .w1 { fill: color-mix(in srgb, var(--teal) 18%, var(--navy)); }
.hero-waves .w2 { fill: var(--bg); }

/* Dark mode: teal edge on wave */
@media (prefers-color-scheme: dark) {
  .hero-waves .w1 { fill: color-mix(in srgb, #6fcfc5 30%, #070e18); }
  .hero-waves .w2 { fill: #0b1622; }
}

/* ---------- 8 · Buttons ---------- */

.btn {
  display: inline-block;
  padding: .74rem 1.4rem;
  border-radius: 999px;
  font-weight: 700; font-size: .96rem;
  text-decoration: none;
  border: 2px solid transparent;
}
.btn-primary { background: var(--btn-gold); color: var(--btn-ink); }
.btn-primary:hover { filter: brightness(1.07); color: var(--btn-ink); }
.btn-ghost {
  border-color: rgba(111,207,197,.55);
  color: var(--hero-ink);
}
.btn-ghost:hover {
  border-color: rgba(111,207,197,.9);
  color: rgba(111,207,197,.95);
}

/* ---------- 9 · Sections ---------- */

/* Generous breathing room between sections */
.section { padding-block: clamp(4.5rem, 10vw, 7.5rem); }
.section-tint { background: var(--tint); }

.kicker {
  color: var(--teal);
  font-weight: 700; font-size: .75rem;
  letter-spacing: .13em; text-transform: uppercase;
  margin-bottom: .5rem;
}

.section h2 { margin-bottom: 2rem; }

.lede {
  max-width: 46rem;
  font-size: 1.01rem;
  color: var(--ink);
  line-height: 1.74;
  margin-bottom: 2.2rem;
}

/* Pull-quote: Garamond italic in EN, bold system KR */
.pull-quote {
  font-family: var(--font-en-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.25rem, .9rem + 1.8vw, 1.8rem);
  color: var(--ink-soft);
  line-height: 1.4;
  max-width: 38rem;
  margin: 2.8rem 0;
  padding-left: 1.5rem;
  border-left: 3px solid var(--gold);
}
html:lang(ko) .pull-quote {
  font-family: var(--font-body);
  font-style: normal;
  font-weight: 600;
  font-size: clamp(1.1rem, .85rem + 1.4vw, 1.5rem);
  letter-spacing: -.02em;
}

/* ---------- 10 · Benefits ---------- */

.benefit-grid {
  display: grid;
  gap: 2.6rem 3.2rem;
  margin-top: 3rem;
}

.benefit { display: flex; flex-direction: column; }

.benefit .icon {
  width: 40px; height: 40px;
  margin-bottom: 1.1rem;
  flex-shrink: 0;
}

.benefit h3 { margin-bottom: .55rem; font-size: 1.05rem; }
.benefit p  { color: var(--ink-soft); margin: 0; line-height: 1.66; }
/* reuses the launch badge (dashed gold pill) inside benefit cards */
.benefit .badge { margin-top: 1rem; }

/* ---------- 11 · Rewards ---------- */

.rule-list {
  list-style: none; margin: 0 0 2.6rem; padding: 0;
  display: grid; gap: 1.9rem;
}
.rule-list li {
  border-left: 3px solid var(--gold);
  padding-left: 1.2rem;
}
.rule-list h3 { margin-bottom: .3rem; font-size: 1.04rem; }
.rule-list p  { color: var(--ink-soft); margin: 0; line-height: 1.64; }

.table-wrap { margin: 0 0 2rem; overflow-x: auto; }

table {
  border-collapse: collapse; width: 100%; max-width: 34rem;
  background: var(--bg-raise); border: 1px solid var(--line);
  border-radius: 12px; overflow: hidden;
  box-shadow: var(--shadow-sm);
}
caption {
  caption-side: top; text-align: left;
  font-weight: 700; font-size: .9rem;
  padding-bottom: .65rem; color: var(--ink);
}
th, td {
  text-align: left; padding: .68rem .92rem;
  border-top: 1px solid var(--line);
  font-variant-numeric: tabular-nums;
}
thead th {
  border-top: none; background: var(--tint);
  font-size: .8rem; letter-spacing: .025em; color: var(--ink-soft);
}
tbody th { font-weight: 700; white-space: nowrap; }

.honest-box {
  max-width: 46rem;
  border: 1px dashed var(--line);
  border-radius: 12px;
  padding: 1.2rem 1.4rem;
  background: var(--bg-raise);
}
.honest-box p {
  margin: 0; font-size: .93rem; color: var(--ink-soft); line-height: 1.62;
}

/* ---------- 12 · Safety ---------- */

.check-list {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 1.4rem;
}
.check-list li {
  position: relative; padding-left: 2.2rem;
  color: var(--ink-soft); line-height: 1.62;
}
.check-list li::before {
  content: '✓';
  position: absolute; left: 0; top: .06em;
  width: 1.45rem; height: 1.45rem;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--teal); color: var(--bg-raise);
  font-weight: 800; font-size: .82rem;
}
.check-list strong { color: var(--ink); }

/* ---------- 13 · Downloads ---------- */

.platform-grid { display: grid; gap: 1.3rem; margin-bottom: 1.7rem; }

.platform {
  background: var(--bg-raise);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.8rem 1.6rem;
  box-shadow: var(--shadow-sm);
}
.platform .icon { width: 34px; height: 34px; color: var(--teal); margin-bottom: .75rem; }
.platform h3   { margin-bottom: .1rem; }
.platform-tag  {
  color: var(--gold-ink); font-weight: 700; font-size: .8rem;
  letter-spacing: .04em; margin-bottom: .75rem;
}
.platform p:last-of-type { color: var(--ink-soft); margin-bottom: 1.1rem; line-height: 1.62; }

.badge {
  display: inline-block; margin: 0;
  padding: .38rem .88rem; border-radius: 999px;
  border: 1.5px dashed var(--gold);
  color: var(--gold-ink); font-weight: 700; font-size: .82rem;
}

.source-note { max-width: 40rem; font-size: .92rem; color: var(--ink-soft); margin: 0; }

/* ---------- 14 · FAQ ---------- */

.faq { display: grid; gap: .9rem; max-width: 46rem; }

details {
  background: var(--bg-raise);
  border: 1px solid var(--line);
  border-radius: 12px; overflow: hidden;
}

summary {
  list-style: none; cursor: pointer;
  padding: 1.05rem 3rem 1.05rem 1.2rem;
  position: relative; font-weight: 700;
}
summary::-webkit-details-marker { display: none; }
summary h3 { margin: 0; font-size: 1rem; }
summary::after {
  content: '+'; position: absolute;
  right: 1.1rem; top: 50%; translate: 0 -50%;
  font-size: 1.5rem; font-weight: 400; line-height: 1;
  color: var(--teal);
}
details[open] summary::after { content: '–'; }
details[open] summary        { border-bottom: 1px solid var(--line); }
details p {
  padding: .95rem 1.2rem 1.1rem; margin: 0;
  color: var(--ink-soft); line-height: 1.66;
}

/* ---------- 15 · Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line); background: var(--tint);
  padding-block: 2.5rem 3.2rem;
  font-size: .86rem; color: var(--ink-soft);
}
.site-footer .legal { max-width: 46rem; }
.site-footer p      { margin-bottom: .55rem; }
.footer-links       { margin-bottom: .75rem; }
.footer-links a     { font-weight: 600; }
.trademark          { font-size: .82rem; }
.copyright          { font-weight: 600; }
.back-top           { margin: .9rem 0 0; }
.back-top a         { font-weight: 700; }

/* ---------- 16 · Motion ---------- */

@media (prefers-reduced-motion: no-preference) {

  html { scroll-behavior: smooth; }

  /* Coin sinusoidal float — 4.5s period */
  .coin-img {
    animation: coin-float 4.5s cubic-bezier(0.37, 0, 0.63, 1) infinite alternate;
  }
  @keyframes coin-float {
    from { transform: translateY(-9px); }
    to   { transform: translateY(9px);  }
  }

  /* Ambient glow breathes */
  .coin-glow {
    animation: glow-pulse 4.5s cubic-bezier(0.37, 0, 0.63, 1) infinite alternate;
  }
  @keyframes glow-pulse {
    from { opacity: .48; transform: scale(.87); }
    to   { opacity: 1;   transform: scale(1.12); }
  }

  /* Slow light sweep across coin — 8s cycle */
  .hero-art::after {
    content: '';
    position: absolute; z-index: 3; pointer-events: none;
    width: 40%; aspect-ratio: 1; border-radius: 50%;
    background: radial-gradient(circle, rgba(255,255,255,.16) 0%, transparent 70%);
    animation: coin-sweep 8s ease-in-out infinite;
  }
  @keyframes coin-sweep {
    0%   { opacity: 0; transform: translate(-28%, -12%) scale(.72); }
    22%  { opacity: 1; transform: translate( 10%,   5%) scale(1);   }
    48%  { opacity: 0; transform: translate( 32%,  24%) scale(.82); }
    100% { opacity: 0; transform: translate(-28%, -12%) scale(.72); }
  }

  .btn, #lang-toggle, summary::after {
    transition: all .16s ease-out;
  }
}

/* ---------- 17 · Wide layouts ---------- */

@media (min-width: 640px) {
  .benefit-grid  { grid-template-columns: 1fr 1fr; }
  .platform-grid { grid-template-columns: 1fr 1fr; }
  .coin-img { width: clamp(16rem, 52vw, 32.5rem); }
}

@media (min-width: 900px) {
  .hero-grid {
    display: grid;
    grid-template-columns: 1.15fr .85fr;
    align-items: start;
    gap: 2rem;
    padding-bottom: clamp(6.5rem, 14vw, 11rem);
  }
  /* coin: right column, large, overlaps wave */
  .hero-art {
    order: 0;
    padding-top: 0;
    padding-bottom: 0;
    margin-bottom: clamp(-4.5rem, -7vw, -8rem);
    align-self: end;
  }
  .coin-img {
    /* ~520px at 1280px viewport, up to 32.5rem = 520px */
    width: clamp(22rem, 38vw, 32.5rem);
  }
}

/* print */
@media print {
  .site-header, .hero-waves, .hero-art, .back-top, #lang-toggle { display: none; }
  .hero { background: none; color: #000; overflow: hidden; }
  body  { background: #fff; }
  details { page-break-inside: avoid; }
}