/* Reska public site — self-contained, no third-party assets or requests. */
:root {
  color-scheme: light;
  --paper: #f5f3ee;
  --paper-deep: #ebe7df;
  --ink: #171421;
  --night: #19152d;
  --night-soft: #282044;
  --muted: #665f70;
  --line: rgba(30, 24, 44, .13);
  --line-strong: rgba(30, 24, 44, .24);
  --violet: #5b35b6;
  --violet-bright: #754ddd;
  --lilac: #a796d1;
  --lavender: #d9cfef;
  --white: #fffefd;
  --success: #1b6d53;
  --shadow: 0 24px 70px rgba(25, 21, 45, .15);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Yu Mincho", "Hiragino Mincho ProN", serif;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", "Hiragino Sans", "Yu Gothic UI", sans-serif;
  --mono: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  --radius: 24px;
  --nav-h: 68px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  min-height: 100vh;
  background:
    radial-gradient(circle at 92% 3%, rgba(117, 77, 221, .12), transparent 28rem),
    radial-gradient(circle at 0 42%, rgba(167, 150, 209, .13), transparent 32rem),
    var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--lavender); color: var(--ink); }
a { color: inherit; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--violet-bright); outline-offset: 4px; border-radius: 5px; }
img { max-width: 100%; }

html[data-lang="en"] .ja { display: none !important; }
html[data-lang="ja"] .en { display: none !important; }

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 200;
  background: var(--white);
  color: var(--ink);
  padding: 10px 16px;
  border: 2px solid var(--violet);
  border-radius: 10px;
  font-weight: 700;
  transition: top .2s ease;
}
.skip-link:focus { top: 12px; }

.wrap { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.measure { width: min(760px, 100%); margin-inline: auto; }
.center { text-align: center; }

.site-nav {
  position: sticky;
  inset-block-start: 0;
  z-index: 100;
  background: rgba(245, 243, 238, .86);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(18px) saturate(1.15);
  backdrop-filter: blur(18px) saturate(1.15);
}
.nav-inner { min-height: var(--nav-h); display: flex; align-items: center; gap: 24px; }
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-weight: 760;
  letter-spacing: -.015em;
  text-decoration: none;
}
.brand img { width: 34px; height: 34px; border-radius: 9px; box-shadow: 0 5px 14px rgba(63, 37, 128, .20); }
.nav-links { display: flex; align-items: center; gap: 22px; margin-left: auto; }
.nav-links a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--violet); }
.lang-switch {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: rgba(255, 254, 253, .72);
}
.lang-switch button {
  appearance: none;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: 700 11px/1 var(--mono);
  letter-spacing: .02em;
  min-width: 38px;
  padding: 8px 9px;
}
html[data-lang="en"] .lang-switch .lang-en,
html[data-lang="ja"] .lang-switch .lang-ja { background: var(--night); color: var(--white); }

.eyebrow {
  color: var(--violet);
  font: 750 11px/1.4 var(--mono);
  letter-spacing: .15em;
  text-transform: uppercase;
}
h1, h2, h3 { text-wrap: balance; }
h1, h2 {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -.035em;
}
h1 { font-size: clamp(42px, 6.5vw, 82px); line-height: .99; }
h2 { font-size: clamp(30px, 4.2vw, 49px); line-height: 1.08; }
h3 { font-size: 18px; line-height: 1.35; letter-spacing: -.015em; }
.lead { color: var(--muted); font-size: clamp(17px, 2vw, 20px); line-height: 1.65; text-wrap: pretty; }

.hero { padding: clamp(84px, 11vw, 146px) 0 100px; position: relative; }
.hero-grid { display: grid; grid-template-columns: 1.04fr .96fr; align-items: center; gap: clamp(42px, 7vw, 90px); }
.hero-copy h1 { margin: 22px 0 24px; }
.hero-copy .lead { max-width: 630px; }
.hero-actions { display: flex; gap: 13px; flex-wrap: wrap; margin-top: 32px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 48px;
  padding: 12px 21px;
  border: 1px solid var(--night);
  border-radius: 14px;
  background: var(--night);
  color: var(--white);
  font-weight: 730;
  text-decoration: none;
  box-shadow: 0 9px 24px rgba(25, 21, 45, .14);
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.button:hover { transform: translateY(-2px); box-shadow: 0 14px 32px rgba(25, 21, 45, .20); }
.button.secondary { background: transparent; color: var(--night); box-shadow: none; }
.button.secondary:hover { background: rgba(255, 254, 253, .66); }

.window-scene { position: relative; min-height: 430px; isolation: isolate; }
.window-scene::before {
  content: "";
  position: absolute;
  inset: 13% -12% -7% 8%;
  z-index: -2;
  background: radial-gradient(circle, rgba(117, 77, 221, .25), transparent 68%);
  filter: blur(24px);
}
.source-window, .float-window {
  position: absolute;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .19);
  border-radius: 20px;
  box-shadow: var(--shadow);
}
.source-window {
  inset: 42px 22px 40px 0;
  background: #211b37;
  transform: rotate(-2.2deg);
}
.float-window {
  width: 67%;
  right: -5px;
  bottom: 8px;
  aspect-ratio: 16 / 10;
  z-index: 3;
  background: linear-gradient(145deg, rgba(151, 134, 190, .92), rgba(103, 78, 164, .92));
  border: 2px solid rgba(255, 255, 255, .58);
  transform: rotate(2deg);
  box-shadow: 0 32px 64px rgba(34, 24, 63, .28);
}
.window-bar { height: 38px; display: flex; align-items: center; gap: 7px; padding: 0 14px; border-bottom: 1px solid rgba(255, 255, 255, .10); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255, 255, 255, .32); }
.window-title { margin-left: 5px; color: rgba(255, 255, 255, .58); font: 10px var(--mono); }
.source-body { height: calc(100% - 38px); display: grid; grid-template-columns: 32% 1fr; }
.sidebar { border-right: 1px solid rgba(255, 255, 255, .08); padding: 21px 14px; }
.line { display: block; height: 7px; margin: 0 0 12px; border-radius: 8px; background: rgba(255, 255, 255, .10); }
.line:nth-child(2) { width: 72%; }.line:nth-child(3) { width: 85%; }.line:nth-child(4) { width: 62%; }
.canvas { padding: 28px; }
.canvas-card { height: 66%; border-radius: 14px; background: linear-gradient(150deg, #6d4bc0, #342756); position: relative; overflow: hidden; }
.canvas-card::after { content: ""; position: absolute; width: 140%; height: 1px; background: rgba(255,255,255,.22); transform: rotate(-25deg); left: -20%; top: 55%; box-shadow: 0 -54px rgba(255,255,255,.11), 0 54px rgba(255,255,255,.08); }
.float-body { height: calc(100% - 38px); padding: 24px; display: flex; flex-direction: column; justify-content: space-between; }
.float-label { color: white; font-family: var(--serif); font-size: clamp(21px, 3vw, 34px); line-height: 1.05; }
.float-meta { color: rgba(255,255,255,.75); font: 10px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.privacy-seal {
  position: absolute;
  left: -14px;
  bottom: -26px;
  z-index: 4;
  display: grid;
  place-items: center;
  width: 108px;
  height: 108px;
  padding: 14px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--paper);
  color: var(--violet);
  font: 750 10px/1.3 var(--mono);
  letter-spacing: .08em;
  text-align: center;
  text-transform: uppercase;
  box-shadow: 0 13px 34px rgba(30, 24, 44, .13);
  transform: rotate(-8deg);
}

.promise { background: var(--night); color: var(--white); padding: 86px 0; }
.promise .eyebrow { color: #bda8f2; }
.promise h2 { max-width: 780px; margin-top: 18px; }
.promise-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 52px; border: 1px solid rgba(255,255,255,.13); border-radius: var(--radius); overflow: hidden; background: rgba(255,255,255,.13); }
.promise-card { min-height: 210px; padding: 30px; background: var(--night); }
.promise-card .number { color: #ad94eb; font: 11px var(--mono); }
.promise-card h3 { margin: 46px 0 9px; font-size: 20px; }
.promise-card p { color: rgba(255,255,255,.63); font-size: 14.5px; }

.home-links { padding: 94px 0 112px; }
.home-links h2 { max-width: 650px; }
.trial-note {
  display: grid;
  grid-template-columns: minmax(220px, .75fr) minmax(300px, 1.25fr);
  gap: clamp(28px, 5vw, 66px);
  align-items: center;
  margin-top: 40px;
  padding: clamp(28px, 5vw, 44px);
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--night), var(--night-soft));
  color: var(--white);
  box-shadow: var(--shadow);
}
.trial-note .eyebrow { color: #bda8f2; }
.trial-note h3 { margin-top: 15px; font: 600 clamp(26px, 3.4vw, 38px)/1.08 var(--serif); }
.trial-note > p { color: rgba(255, 255, 255, .70); font-size: 15px; }
.link-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 40px; }
.link-card {
  position: relative;
  min-height: 240px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 254, 253, .64);
  color: var(--ink);
  text-decoration: none;
  overflow: hidden;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.link-card::after { content: "↗"; position: absolute; right: 26px; top: 22px; color: var(--violet); font-size: 28px; }
.link-card:hover { transform: translateY(-4px); border-color: var(--lilac); box-shadow: 0 20px 50px rgba(30, 24, 44, .10); }
.link-card h3 { margin-top: 78px; font: 600 30px/1.1 var(--serif); }
.link-card p { margin-top: 9px; color: var(--muted); max-width: 430px; }

.doc-hero { padding: 88px 0 62px; }
.doc-hero h1 { font-size: clamp(41px, 6vw, 67px); margin: 18px 0 20px; }
.doc-hero .lead { max-width: 710px; }
.updated { margin-top: 18px; color: var(--muted); font: 11px var(--mono); letter-spacing: .04em; }
.summary-box {
  margin-top: 38px;
  padding: 25px 27px;
  border: 1px solid rgba(91, 53, 182, .32);
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(117, 77, 221, .09), rgba(255, 254, 253, .54));
  color: #34284b;
}
.summary-box strong { color: var(--violet); }

.doc-body { padding: 10px 0 112px; }
.doc-section { padding: 42px 0; border-top: 1px solid var(--line); }
.doc-section:first-child { border-top: 0; }
.doc-section h2 { font-size: clamp(27px, 4vw, 38px); margin-bottom: 17px; }
.doc-section h3 { margin: 27px 0 7px; }
.doc-section p, .doc-section li { color: var(--muted); }
.doc-section p + p { margin-top: 13px; }
.doc-section ul, .doc-section ol { padding-left: 1.35em; display: grid; gap: 10px; }
.doc-section strong { color: var(--ink); }
.doc-section a { color: var(--violet); text-underline-offset: 4px; }
.inline-code, kbd {
  display: inline-block;
  padding: 2px 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(255,255,255,.58);
  color: var(--ink);
  font: 12px var(--mono);
  white-space: nowrap;
}
.fact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 24px; }
.fact {
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 254, 253, .54);
}
.fact b { display: block; margin-bottom: 7px; color: var(--ink); }
.fact p { font-size: 14px; }
.callout {
  margin-top: 22px;
  padding: 20px 22px;
  border-left: 4px solid var(--violet);
  background: rgba(117, 77, 221, .07);
  border-radius: 0 13px 13px 0;
}

.steps { counter-reset: steps; display: grid; gap: 14px; margin-top: 25px; }
.step {
  counter-increment: steps;
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 15px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 254, 253, .54);
}
.step::before {
  content: counter(steps, decimal-leading-zero);
  color: var(--violet);
  font: 750 12px var(--mono);
  padding-top: 2px;
}
.step p { font-size: 14.5px; }

.faq { display: grid; gap: 12px; }
.faq details { border: 1px solid var(--line); border-radius: 16px; background: rgba(255, 254, 253, .58); padding: 0 22px; }
.faq details[open] { border-color: rgba(91, 53, 182, .38); }
.faq summary { cursor: pointer; list-style: none; padding: 19px 30px 19px 0; font-weight: 730; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 16px; color: var(--violet); font: 22px var(--mono); }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding: 0 30px 20px 0; color: var(--muted); font-size: 14.5px; }

.contact-box {
  margin-top: 34px;
  padding: clamp(28px, 5vw, 46px);
  border-radius: var(--radius);
  background: var(--night);
  color: var(--white);
}
.contact-box h2 { font-size: clamp(28px, 4vw, 40px); }
.contact-box p { margin-top: 12px; color: rgba(255,255,255,.66); }
.contact-box .button { margin-top: 24px; background: var(--white); color: var(--night); border-color: var(--white); }

footer { border-top: 1px solid var(--line); padding: 48px 0 56px; color: var(--muted); font-size: 13px; }
.footer-grid { display: flex; align-items: flex-start; justify-content: space-between; gap: 30px; }
.footer-links { list-style: none; display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a { color: var(--muted); text-underline-offset: 4px; }
.fine { margin-top: 24px; font: 11px var(--mono); color: #81798a; }

[data-reveal] { transition: opacity .6s ease, transform .6s cubic-bezier(.2,.7,.2,1); }
html.js [data-reveal]:not(.is-visible) { opacity: 0; transform: translateY(20px); }

@media (max-width: 820px) {
  .hero-grid { grid-template-columns: 1fr; }
  .window-scene { min-height: 390px; width: min(570px, 100%); }
  .promise-grid { grid-template-columns: 1fr; }
  .promise-card { min-height: 170px; }
  .promise-card h3 { margin-top: 26px; }
}

@media (max-width: 620px) {
  .wrap { width: min(100% - 32px, 1120px); }
  .site-nav .nav-links { display: none; }
  .lang-switch { margin-left: auto; }
  .hero { padding-top: 70px; }
  .window-scene { min-height: 310px; }
  .source-window { inset: 30px 8px 32px 0; }
  .float-window { width: 72%; }
  .privacy-seal { width: 88px; height: 88px; font-size: 8.5px; }
  .link-cards, .fact-grid { grid-template-columns: 1fr; }
  .trial-note { grid-template-columns: 1fr; }
  .link-card { min-height: 205px; }
  .link-card h3 { margin-top: 56px; }
  .footer-grid { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  html.js [data-reveal]:not(.is-visible) { opacity: 1; transform: none; }
}

@media print {
  .site-nav, .skip-link, .hero-actions, footer { display: none !important; }
  body { background: white; color: black; font-size: 12pt; }
  .doc-hero, .doc-body { padding: 24px 0; }
  .wrap { width: 100%; }
  .doc-section p, .doc-section li { color: #222; }
}