:root {
  color-scheme: dark;
  --night: #141029;
  --night-2: #1a1535;
  --card: #221b44;
  --card-2: #2a2252;
  --line: rgba(200, 190, 255, .14);
  --text: #f1eeff;
  --muted: #b3aad6;
  --violet: #9a85f5;
  --violet-deep: #6e56cf;
  --lavender: #d9d0ff;
  --teal: #4ac6bd;
  --pink: #ec79a8;
  --radius: 22px;
  --wrap: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--night);
  color: var(--text);
  font-family: "Zen Kaku Gothic New", "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.85;
  font-feature-settings: "palt";
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--violet); }
h1, h2, h3 { line-height: 1.35; margin: 0; font-weight: 900; }
p { margin: 0; }
.wrap { width: min(var(--wrap), 100% - 32px); margin-inline: auto; }
section { padding: 96px 0; }
@media (max-width: 720px) { section { padding: 72px 0; } }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(20, 16, 41, .78);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; letter-spacing: .04em; }
.brand img { border-radius: 9px; }
.site-header nav { display: flex; gap: 22px; font-size: 14px; }
.site-header nav a { color: var(--muted); text-decoration: none; white-space: nowrap; }
@media (max-width: 480px) { .site-header nav { gap: 14px; font-size: 13px; } }
.site-header nav a:hover { color: var(--text); }
@media (max-width: 760px) { .hide-sm { display: none; } }

/* ---------- shared ---------- */
.phone {
  border-radius: 34px;
  overflow: hidden;
  border: 6px solid #2b2350;
  background: #2b2350;
  box-shadow: 0 30px 70px rgba(0, 0, 0, .45), 0 0 0 1px rgba(255, 255, 255, .06);
}
.phone img { width: 100%; }
.section-title { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.kicker { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: .24em; color: var(--violet); margin-bottom: 12px; }
.section-title h2 { font-size: clamp(26px, 4.4vw, 38px); }
.section-title p { color: var(--muted); margin-top: 16px; }
em { font-style: normal; color: var(--teal); }

.store-btn {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 14px 24px; border-radius: 16px;
  background: var(--violet); color: #140f2b; text-decoration: none; font-weight: 700;
}
.store-btn svg { width: 26px; height: 26px; flex: none; }
.store-btn small { display: block; font-size: 12px; font-weight: 500; opacity: .8; line-height: 1.3; }
.store-btn span { line-height: 1.4; font-size: 17px; }
.store-btn.soon { background: transparent; color: var(--text); border: 1.5px solid var(--violet); cursor: default; }
.store-btn.soon svg { color: var(--violet); }
.cta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.cta-note { color: var(--muted); font-size: 13px; }

/* ---------- hero ---------- */
.hero {
  position: relative;
  overflow-x: clip;
  padding: 72px 0 40px;
  background:
    radial-gradient(900px 520px at 85% 10%, rgba(154, 133, 245, .2), transparent 60%),
    radial-gradient(700px 480px at 0% 100%, rgba(74, 198, 189, .12), transparent 60%);
}
.hero .wrap { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.pill {
  display: inline-block; padding: 6px 14px; border-radius: 99px;
  background: rgba(154, 133, 245, .14); color: var(--lavender);
  font-size: 13px; font-weight: 700; margin-bottom: 20px;
}
.hero h1 { font-size: clamp(34px, 5.4vw, 58px); letter-spacing: .01em; }
.hero h1 .line { display: block; white-space: nowrap; }
.hero .lead { color: var(--muted); font-size: clamp(15px, 1.8vw, 17px); margin: 24px 0 32px; max-width: 34em; }
.hero-visual { position: relative; justify-self: center; width: min(300px, 78vw); }
.hero-visual .phone { position: relative; z-index: 1; }
.hero-visual .glow {
  position: absolute; inset: 12% -30% -6% -30%; z-index: 0;
  background: radial-gradient(closest-side, rgba(154, 133, 245, .4), transparent);
  filter: blur(10px);
}
.chips { list-style: none; padding: 0; margin: 40px 0 0; display: flex; flex-wrap: wrap; gap: 10px; }
.chips li {
  font-size: 13px; font-weight: 700; color: var(--text);
  padding: 7px 14px; border-radius: 99px; border: 1px solid var(--line); background: rgba(255, 255, 255, .03);
}
.chips li::before { content: "✓"; color: var(--teal); margin-right: 6px; }
@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; text-align: left; }
  .hero-visual { width: min(260px, 70vw); }
}

/* ---------- modes ---------- */
#modes { background: var(--night-2); }
.modes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.mode {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 22px; display: flex; flex-direction: column; gap: 10px;
}
.mode .ic {
  width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center;
  background: rgba(154, 133, 245, .16); color: var(--violet);
}
.mode:nth-child(3n+2) .ic { background: rgba(74, 198, 189, .16); color: var(--teal); }
.mode:nth-child(3n) .ic { background: rgba(236, 121, 168, .16); color: var(--pink); }
.mode .ic svg { width: 28px; height: 28px; }
.mode h3 { font-size: 18px; }
.mode p { color: var(--muted); font-size: 14px; }
.mode .model { margin-top: auto; padding-top: 12px; border-top: 1px dashed var(--line); font-size: 12px; color: var(--lavender); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
@media (max-width: 960px) { .modes { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .modes { grid-template-columns: 1fr; } }

/* ---------- features ---------- */
.features { display: grid; gap: 40px; }
.feature {
  display: grid; grid-template-columns: 1fr 260px; gap: 48px; align-items: center;
  background: linear-gradient(160deg, var(--card), var(--night-2));
  border: 1px solid var(--line); border-radius: 28px; padding: 44px;
}
.feature:nth-child(even) { grid-template-columns: 260px 1fr; }
.feature:nth-child(even) .feature-body { order: 2; }
.feature-tag { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700; color: var(--violet); letter-spacing: .08em; }
.feature-tag b { font-size: 12px; background: var(--violet); color: var(--night); border-radius: 6px; padding: 1px 8px; letter-spacing: .1em; }
.feature h3 { font-size: clamp(21px, 3vw, 27px); margin: 12px 0 14px; }
.feature p { color: var(--muted); font-size: 15px; }
.feature ul { margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 8px; font-size: 15px; }
.feature li { padding-left: 26px; position: relative; }
.feature li::before { content: ""; position: absolute; left: 2px; top: .55em; width: 12px; height: 7px; border-left: 2px solid var(--teal); border-bottom: 2px solid var(--teal); transform: rotate(-45deg); }
.feature .phone { width: 100%; max-width: 260px; margin-inline: auto; }
@media (max-width: 820px) {
  .feature, .feature:nth-child(even) { grid-template-columns: 1fr; padding: 28px 20px; gap: 28px; }
  .feature:nth-child(even) .feature-body { order: 0; }
  .feature .phone { max-width: 220px; }
}

/* ---------- steps ---------- */
#start { background: var(--night-2); }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: st; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px; }
.step .no { font-size: 13px; font-weight: 900; color: var(--teal); letter-spacing: .1em; }
.step h3 { font-size: 20px; margin: 8px 0 12px; }
.step p { color: var(--muted); font-size: 15px; }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr; } }

/* ---------- screens ---------- */
.gallery {
  display: grid; grid-auto-flow: column; grid-auto-columns: 220px; gap: 22px;
  overflow-x: auto; scroll-snap-type: x mandatory; padding: 4px 16px 20px;
  scrollbar-width: thin; scrollbar-color: var(--card-2) transparent;
}
.gallery figure { margin: 0; scroll-snap-align: center; }
.gallery .phone { border-radius: 28px; border-width: 5px; }
.gallery figcaption { text-align: center; font-size: 14px; font-weight: 700; margin-top: 14px; }
.gallery figcaption span { display: block; font-size: 12px; font-weight: 500; color: var(--muted); }
@media (min-width: 1150px) { .gallery { justify-content: center; } }

/* ---------- price ---------- */
#price { background: var(--night-2); }
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 900px; margin-inline: auto; }
.plan { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 28px; }
.plan.plus { border-color: rgba(236, 121, 168, .45); background: linear-gradient(170deg, rgba(236, 121, 168, .1), var(--card) 60%); }
.plan .name { font-size: 14px; font-weight: 700; color: var(--muted); }
.plan .price { font-size: 30px; font-weight: 900; margin: 4px 0 4px; }
.plan .price small { font-size: 14px; font-weight: 500; color: var(--muted); margin-left: 6px; }
.plan > p:not(.price):not(.name) { color: var(--muted); font-size: 14px; }
.plan ul { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 10px; font-size: 15px; }
.plan li { padding-left: 26px; position: relative; }
.plan li::before { content: ""; position: absolute; left: 2px; top: .55em; width: 12px; height: 7px; border-left: 2px solid var(--violet); border-bottom: 2px solid var(--violet); transform: rotate(-45deg); }
.plan.plus li::before { border-color: var(--pink); }
.plan-note { text-align: center; color: var(--muted); font-size: 13px; margin-top: 20px; }
@media (max-width: 720px) { .plans { grid-template-columns: 1fr; } }

/* ---------- faq ---------- */
.faq { max-width: 800px; margin-inline: auto; display: grid; gap: 12px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 0 22px; }
.faq summary { cursor: pointer; list-style: none; padding: 18px 28px 18px 0; font-weight: 700; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "Q"; color: var(--violet); font-weight: 900; margin-right: 10px; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 14px; font-size: 22px; color: var(--muted); transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { color: var(--muted); font-size: 15px; padding: 0 0 20px 24px; }

/* ---------- note / final ---------- */
.notice { padding: 0 0 8px; }
.notice .box {
  max-width: 800px; margin: 48px auto 0; padding: 18px 22px; border-radius: 16px;
  border: 1px solid rgba(74, 198, 189, .35); background: rgba(74, 198, 189, .06);
  font-size: 14px; color: var(--muted);
}
.notice .box b { color: var(--teal); }
.final { text-align: center; background: radial-gradient(700px 400px at 50% 100%, rgba(154, 133, 245, .2), transparent 70%); }
.final .icon { margin: 0 auto 28px; border-radius: 24px; box-shadow: 0 16px 40px rgba(0, 0, 0, .4); }
.final .section-title { margin-bottom: 32px; }
.final .cta { justify-content: center; }

.site-footer { border-top: 1px solid var(--line); padding: 28px 0 36px; font-size: 13px; color: var(--muted); }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.site-footer nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); }

/* ---------- document pages (privacy / support) ---------- */
.doc { padding: 64px 0 96px; }
.doc .wrap { max-width: 760px; }
.doc h1 { font-size: clamp(28px, 4.4vw, 38px); }
.doc .updated { color: var(--muted); font-size: 14px; margin: 8px 0 32px; }
.doc h2 { font-size: 20px; margin: 44px 0 14px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.doc p, .doc li { color: var(--muted); font-size: 15px; }
.doc p + p { margin-top: 12px; }
.doc ul { padding-left: 1.3em; margin: 10px 0 0; display: grid; gap: 6px; }
.doc strong { color: var(--text); }
.doc code { font-size: .9em; background: rgba(255, 255, 255, .06); padding: .1em .35em; border-radius: 4px; }
.doc .lang { margin-top: 72px; padding-top: 40px; border-top: 2px solid var(--line); }
.doc .contact-card { margin-top: 24px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.doc .contact-card a { font-weight: 700; font-size: 17px; }