/* =========================================================
   MCHub — design system
   Apple-inspired: white canvas, generous space, big type.
   ========================================================= */

:root {
  --bg: #ffffff;
  --bg-alt: #f5f5f7;
  --bg-dark: #0a0a0b;
  --ink: #1d1d1f;
  --ink-soft: #6e6e73;
  --ink-faint: #86868b;
  --line: #e3e3e6;
  --line-strong: #d2d2d7;

  --accent: #0a6cff;
  --accent-press: #0a5ad1;
  --grad: linear-gradient(118deg, #2b6bff 0%, #7b3ff2 60%, #21c8d6 120%);
  --grad-cta: linear-gradient(118deg, #2b6bff, #7b3ff2 58%, #4f8bff);

  --maxw: 1280px;
  --pad: clamp(20px, 5vw, 56px);

  --r-sm: 12px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-pill: 980px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.05), 0 8px 24px rgba(0,0,0,.04);
  --shadow-md: 0 2px 8px rgba(15,23,42,.05), 0 18px 44px -18px rgba(15,23,42,.14);

  --ease-spring: cubic-bezier(.22, 1.12, .28, 1);
  --ease-out: cubic-bezier(.2, .7, .2, 1);

  --nav-h: 52px;

  --font: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Helvetica Neue",
          "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  --font-en: "Space Grotesk", "Helvetica Neue", -apple-system, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  letter-spacing: .02em;
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

::selection { background: rgba(10,108,255,.18); }

/* ---------- layout helpers ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--pad); }
.wrap-wide { max-width: 1320px; margin: 0 auto; padding-inline: var(--pad); }

.section { padding-block: clamp(72px, 11vw, 140px); }
.section-tight { padding-block: clamp(48px, 7vw, 84px); }
.bg-alt { background: var(--bg-alt); }
.bg-dark { background: var(--bg-dark); color: #f5f5f7; }

/* ---------- type ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 22px;
}
.eyebrow::before {
  content: ""; flex: none; width: 26px; height: 2px; border-radius: 2px;
  background: var(--grad);
}
.eyebrow .no { color: var(--ink-faint); letter-spacing: .12em; font-weight: 500; }
.eyebrow .no::before { content: "/"; margin-right: 9px; color: var(--line-strong); }
.eyebrow.grad { background: none; -webkit-background-clip: initial; background-clip: initial; color: var(--ink); }

h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -.015em; line-height: 1.16; }

.display, .h-sec { text-wrap: balance; }

.display {
  font-size: clamp(40px, 7.5vw, 92px);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.06;
}
.h-sec {
  font-size: clamp(28px, 4vw, 50px);
  font-weight: 800;
  letter-spacing: -.024em;
  line-height: 1.14;
}
.h-card { font-size: clamp(19px, 1.7vw, 22px); font-weight: 700; letter-spacing: -.01em; }

.lead {
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--ink-soft);
  line-height: 1.9;
  font-weight: 450;
  text-wrap: pretty;
}
.muted { color: var(--ink-soft); }
.faint { color: var(--ink-faint); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5em;
  font-family: inherit; font-size: 16px; font-weight: 600;
  padding: 13px 26px; border-radius: var(--r-pill);
  background: var(--grad-cta); color: #fff; border: 0; cursor: pointer;
  box-shadow: 0 8px 20px -8px rgba(43,107,255,.5), inset 0 1px 0 rgba(255,255,255,.22);
  transition: transform .25s var(--ease-spring), filter .2s, box-shadow .3s;
  text-decoration: none; line-height: 1; white-space: nowrap;
}
.btn:hover { filter: brightness(1.06); transform: translateY(-2px); box-shadow: 0 12px 26px -8px rgba(43,107,255,.6), inset 0 1px 0 rgba(255,255,255,.28); }
.btn:active { transform: translateY(0) scale(.985); }
/* magnetic pull (JS sets --mx/--my on fine pointers) */
.btn.mag { transform: translate(var(--mx, 0px), calc(var(--my, 0px) - 2px)); }
.btn.mag:active { transform: translate(var(--mx, 0px), var(--my, 0px)) scale(.985); }
.btn.dark { background: var(--ink); box-shadow: none; }
.btn.dark:hover { background: #000; box-shadow: 0 10px 24px rgba(0,0,0,.2); }
.btn.ghost { background: transparent; color: var(--accent); padding-inline: 0; box-shadow: none; }
.btn.ghost:hover { background: transparent; transform: none; box-shadow: none; filter: none; }

.linkarrow {
  display: inline-flex; align-items: center; gap: .35em; white-space: nowrap;
  color: var(--accent); font-weight: 600; font-size: 16px;
}
.linkarrow .ar { transition: transform .3s var(--ease-spring); }
.linkarrow:hover .ar { transform: translateX(5px); }

/* ---------- nav (floating frosted capsule) ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  display: flex; justify-content: center;
  padding: clamp(10px, 1.5vw, 16px) var(--pad) 0;
  background: transparent; border: 0;
  transition: transform .45s var(--ease-out), padding .35s var(--ease-out);
}
.nav.hide { transform: translateY(-140%); }
.nav.scrolled { padding-top: clamp(6px, 1vw, 10px); }
.nav-inner {
  width: 100%; max-width: var(--maxw); height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 8px 0 18px;
  border-radius: var(--r-pill);
  background: rgba(255,255,255,.58);
  backdrop-filter: saturate(190%) blur(24px);
  -webkit-backdrop-filter: saturate(190%) blur(24px);
  border: 1px solid rgba(255,255,255,.55);
  box-shadow:
    0 1px 1px rgba(15,23,42,.04),
    0 14px 34px -14px rgba(20,32,68,.26),
    inset 0 1px 0 rgba(255,255,255,.75);
  position: relative;
}
/* gradient hairline glow along the top edge */
.nav-inner::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: linear-gradient(120deg, rgba(43,107,255,.55), rgba(123,63,242,.4) 45%, rgba(33,200,214,.5));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: .32; pointer-events: none;
}
.nav.scrolled .nav-inner { background: rgba(255,255,255,.72); box-shadow: 0 1px 1px rgba(15,23,42,.05), 0 18px 40px -16px rgba(20,32,68,.3), inset 0 1px 0 rgba(255,255,255,.8); }
.nav-logo { display: flex; align-items: center; padding: 6px 4px; border-radius: var(--r-pill); transition: transform .3s var(--ease-spring); }
.nav-logo:hover { transform: scale(1.03); }
.nav-logo img { height: 24px; width: auto; display: block; }
.nav-logo .logo-svg { height: 22px; width: auto; color: var(--ink); }
.nav-links { display: flex; gap: 2px; align-items: center; }
.nav-links a {
  position: relative; font-size: 14px; color: var(--ink-soft); padding: 9px 15px; border-radius: var(--r-pill);
  transition: color .25s, background .25s; white-space: nowrap;
}
.nav-links a:not(.cta)::after {
  content: ""; position: absolute; left: 50%; bottom: 5px; width: 0; height: 2px; border-radius: 2px;
  background: var(--grad); transform: translateX(-50%); transition: width .3s var(--ease-spring);
}
.nav-links a:not(.cta):hover { color: var(--ink); }
.nav-links a:not(.cta):hover::after { width: calc(100% - 30px); }
.nav-links a[aria-current="page"] { color: var(--ink); font-weight: 600; }
.nav-links a[aria-current="page"]::after { width: calc(100% - 30px); }
.nav-links a.cta {
  color: #fff; background: var(--grad-cta);
  font-weight: 600; padding: 10px 19px; margin-left: 8px;
  box-shadow: 0 6px 16px -5px rgba(43,107,255,.6);
  transition: transform .3s var(--ease-spring), box-shadow .3s, filter .2s;
}
.nav-links a.cta::after { display: none; }
.nav-links a.cta:hover { transform: translateY(-1px); filter: brightness(1.06); box-shadow: 0 10px 22px -6px rgba(43,107,255,.7); }
.nav-burger { display: none; background: none; border: 0; cursor: pointer; padding: 8px; margin-right: 6px; }
.nav-burger span { display: block; width: 22px; height: 1.6px; background: var(--ink); margin: 5px 0; transition: .3s; }

@media (max-width: 760px) {
  .nav-inner { padding-right: 4px; }
  .nav-links { position: fixed; inset: calc(var(--nav-h) + 18px) var(--pad) auto; flex-direction: column; gap: 0;
    background: rgba(255,255,255,.9); backdrop-filter: saturate(180%) blur(24px); -webkit-backdrop-filter: saturate(180%) blur(24px);
    padding: 8px 14px 16px; border-radius: var(--r-lg);
    border: 1px solid rgba(255,255,255,.6); box-shadow: 0 20px 44px -16px rgba(20,32,68,.32);
    transform: translateY(-12px) scale(.98); opacity: 0; pointer-events: none; transition: .32s var(--ease-out); transform-origin: top; }
  .nav-links.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-links a { width: 100%; padding: 14px 10px; font-size: 17px; border-radius: 12px; border-bottom: 1px solid var(--line); }
  .nav-links a:not(.cta)::after { display: none; }
  .nav-links a:last-of-type { border-bottom: 0; }
  .nav-links a.cta { margin: 12px 0 0; border-radius: var(--r-pill); justify-content: center; display: flex; }
  .nav-burger { display: block; }
}

/* ---------- logo svg ---------- */
.logo-svg { display: block; }
.logo-part { fill: currentColor; }

/* ---------- footer (luxe, light) ---------- */
.footer { position: relative; overflow: hidden; font-size: 13px; color: var(--ink-soft);
  background: linear-gradient(180deg, #ffffff 0%, #f3f5fa 38%, #eef1f8 100%);
  border-top: 1px solid var(--line); }
.footer::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px;
  background: linear-gradient(90deg, transparent, rgba(43,107,255,.5) 20%, rgba(123,63,242,.5) 50%, rgba(33,200,214,.5) 80%, transparent); opacity: .7; }
.footer-aura { position: absolute; pointer-events: none; z-index: 0;
  width: 60vw; height: 60vw; max-width: 760px; max-height: 760px; left: 60%; bottom: -38%;
  background: radial-gradient(circle at 50% 50%, rgba(43,107,255,.16), rgba(123,63,242,.08) 40%, transparent 70%);
  filter: blur(20px); }
.footer .wrap { position: relative; z-index: 2; padding-block: clamp(48px, 6vw, 80px) 30px; }

/* mini CTA row */
.footer-cta { display: flex; align-items: center; justify-content: space-between; gap: 28px; flex-wrap: wrap;
  padding-bottom: clamp(34px, 5vw, 54px); margin-bottom: clamp(34px, 5vw, 54px); border-bottom: 1px solid var(--line-strong); }
.footer-cta-kicker { font-family: var(--font-en); font-size: 11px; font-weight: 600; letter-spacing: .26em; margin: 0 0 12px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.footer-cta-title { font-size: clamp(24px, 3.2vw, 40px); font-weight: 800; letter-spacing: -.025em; line-height: 1.18; color: var(--ink); margin: 0; }
.footer-cta-btn { font-size: 16px; padding: 15px 30px; background: var(--grad-cta);
  box-shadow: 0 10px 26px -8px rgba(43,107,255,.6); }
.footer-cta-btn .ar { transition: transform .3s var(--ease-spring); }
.footer-cta-btn:hover { background: var(--grad-cta); filter: brightness(1.05); }
.footer-cta-btn:hover .ar { transform: translateX(5px); }

.footer-top { display: grid; grid-template-columns: 1.7fr 1fr 1fr 1.1fr; gap: clamp(28px,4vw,56px); padding-bottom: 44px; }
.footer-brand .logo-svg { height: 28px; color: var(--ink); margin-bottom: 16px; }
.footer-lockup { display: block; margin-bottom: 16px; }
.footer-lockup img { height: 32px; width: auto; display: block; }
.footer-desc { max-width: 40ch; line-height: 1.7; color: var(--ink-soft); margin: 0 0 20px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center;
  background: rgba(255,255,255,.7); border: 1px solid var(--line-strong); color: var(--ink-soft);
  box-shadow: 0 1px 2px rgba(15,23,42,.04); transition: transform .3s var(--ease-spring), color .2s, border-color .2s, background .2s; }
.footer-social a:hover { transform: translateY(-3px); color: #fff; border-color: transparent; background: linear-gradient(135deg, #2b6bff, #7b3ff2); }
.footer-social svg { width: 19px; height: 19px; }
.footer h4 { font-family: var(--font-en); font-size: 11px; letter-spacing: .22em; text-transform: uppercase; color: var(--ink-faint); margin: 4px 0 16px; font-weight: 600; }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.footer ul a, .footer ul span { color: var(--ink-soft); transition: color .2s; }
.footer ul li.is-static { color: var(--ink-faint); }
.footer ul a { position: relative; }
.footer ul a:hover { color: var(--accent); }
.footer-col .k { display: block; font-size: 11px; color: var(--ink-faint); margin-bottom: 2px; letter-spacing: .04em; }

.footer-bottom { position: relative; z-index: 2; padding-top: 24px; border-top: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; color: var(--ink-faint); }
.footer-bottom .footer-tagline { letter-spacing: .02em; }
.footer-toplink { display: inline-flex; align-items: center; gap: 6px; color: var(--ink-soft); font-weight: 600; transition: color .2s; }
.footer-toplink:hover { color: var(--accent); }
.footer-toplink .up { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; border: 1px solid var(--line-strong); transition: transform .3s var(--ease-spring), border-color .2s; }
.footer-toplink:hover .up { transform: translateY(-3px); border-color: var(--accent); }

/* giant ghost wordmark */
.footer-watermark { position: absolute; left: 50%; bottom: clamp(-26px, -3vw, -14px); transform: translateX(-50%) translate3d(0, var(--plx, 0px), 0);
  z-index: 1; font-weight: 800; letter-spacing: -.04em; white-space: nowrap; pointer-events: none;
  font-size: clamp(96px, 22vw, 320px); line-height: .8;
  background: linear-gradient(180deg, rgba(20,32,68,.07), rgba(20,32,68,0)); -webkit-background-clip: text; background-clip: text; color: transparent; }

@media (max-width: 860px){
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 520px){
  .footer-cta { flex-direction: column; align-items: flex-start; gap: 20px; }
  .footer-cta-btn { width: 100%; justify-content: center; }
  .footer-bottom { flex-direction: column-reverse; align-items: flex-start; gap: 16px; }
  .footer-toplink { align-self: flex-end; }
}

/* ============ mobile refinements (global) ============ */
@media (max-width: 640px){
  .section { padding-block: clamp(56px, 14vw, 72px); }
  .section-tight { padding-block: clamp(36px, 9vw, 52px); }
  .btn { min-height: 48px; padding: 13px 24px; font-size: 15px; }
  .lead { font-size: 15.5px; line-height: 1.85; }
  .h-sec { font-size: clamp(26px, 7.4vw, 34px); }
  .display { font-size: clamp(34px, 9.6vw, 44px); }
}

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(34px) scale(.985); filter: blur(7px);
  transition: opacity .95s var(--ease-out), transform .95s var(--ease-out), filter .95s var(--ease-out); }
.reveal.in { opacity: 1; transform: none; filter: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
.reveal.d4 { transition-delay: .32s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; filter: none; transition: none; }
}

/* ---------- scroll progress ---------- */
.scroll-progress { position: fixed; left: 0; top: 0; height: 3px; width: 100%; z-index: 10000;
  background: var(--grad); transform-origin: 0 50%; transform: scaleX(0); pointer-events: none; }
@media (prefers-reduced-motion: reduce) { .scroll-progress { display: none; } }