/* =========================================================
   はこつき / Hakomoon — landing page
   Light theme. Colours pulled from the logo gradient so the
   whole thing sits in one teal→blue world.
   All theme values are CSS variables → easy to retune / add dark mode later.
   ========================================================= */

:root {
  /* Surfaces */
  --bg:        #ffffff;
  --bg-2:      #f4f6fa;

  /* Text */
  --text:      #16203a;   /* deep navy */
  --muted:     #5b6b85;   /* grey-blue */

  /* Brand accents (from the logo) */
  --teal-deep: #377c67;
  --teal:      #2e8b72;
  --sage:      #76b2a1;
  --blue:      #4a90d9;
  --blue-soft: #a9d4f2;

  /* UI */
  --border:    #e4e9f2;
  --card:      #ffffff;
  --shadow:    0 1px 2px rgba(22, 32, 58, .04), 0 8px 24px rgba(22, 32, 58, .06);
  --shadow-hi: 0 6px 16px rgba(46, 139, 114, .18), 0 14px 34px rgba(74, 144, 217, .18);

  --grad:      linear-gradient(135deg, var(--teal-deep) 0%, var(--sage) 45%, var(--blue) 100%);

  --radius:    999px;
  --maxw:      640px;
}

* { box-sizing: border-box; }

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

html, body { overflow-x: hidden; }

body {
  margin: 0;
  min-height: 100dvh;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  color: var(--text);
  font-family: "Zen Kaku Gothic New", "Jost", system-ui, -apple-system, "Segoe UI", sans-serif;
  background:
    radial-gradient(1100px 620px at 50% 22%, rgba(74, 144, 217, .07), transparent 60%),
    radial-gradient(900px 520px at 50% 24%, rgba(46, 139, 114, .06), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---------- Stage (centred content) ---------- */
.stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(1.1rem, 3.2vw, 1.9rem);
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4rem) 1.25rem;
  text-align: center;
}

/* ---------- Logo ---------- */
.logo {
  width: min(86vw, 460px);
  height: auto;
  filter: drop-shadow(0 18px 40px rgba(46, 118, 130, .16));
  animation: float 7s ease-in-out infinite;
}

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

/* ---------- Wordmark ---------- */
.wordmark {
  margin: 0;
  font-weight: 500;
  font-size: clamp(1.45rem, 5.2vw, 2.35rem);
  line-height: 1.2;
  letter-spacing: .06em;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  justify-content: center;
  gap: .5em;
  max-width: 100%;
}
.wm-ja  { font-family: "Zen Kaku Gothic New", sans-serif; letter-spacing: .14em; }
.wm-sep { color: var(--sage); font-weight: 300; font-family: "Jost", sans-serif; }
.wm-en  {
  font-family: "Jost", sans-serif;
  font-weight: 400;
  letter-spacing: .18em;
  font-size: .92em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Links ---------- */
.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .7rem .75rem;
  margin-top: .4rem;
  width: 100%;
}

.link {
  --fg: var(--text);
  display: inline-flex;
  align-items: center;
  gap: .55em;
  padding: .62rem 1.05rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
  color: var(--fg);
  text-decoration: none;
  font-family: "Jost", "Zen Kaku Gothic New", sans-serif;
  font-weight: 500;
  font-size: .95rem;
  letter-spacing: .02em;
  line-height: 1;
  transition:
    transform .18s ease,
    box-shadow .22s ease,
    border-color .22s ease,
    background .22s ease,
    color .18s ease;
}

.link .ico {
  width: 1.15em;
  height: 1.15em;
  fill: currentColor;
  flex: none;
  transition: transform .18s ease;
}

.link:hover,
.link:focus-visible {
  transform: translateY(-3px);
  border-color: transparent;
  background: var(--grad);
  color: #fff;
  box-shadow: var(--shadow-hi);
}
.link:hover .ico,
.link:focus-visible .ico { transform: scale(1.06); }

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

.link:active { transform: translateY(-1px); }

/* ---------- Footer ---------- */
.foot {
  padding: 1.4rem 1rem 1.8rem;
  text-align: center;
  color: var(--muted);
  font-family: "Jost", sans-serif;
  font-size: .72rem;
  letter-spacing: .14em;
  opacity: .8;
}

/* ---------- Motion / accessibility ---------- */
@media (prefers-reduced-motion: reduce) {
  .logo { animation: none; }
  .link, .link .ico { transition: none; }
}