/* Mobile-first base styles */
:root {
  --bg: #0b0b0f;
  --surface: #121218;
  --text: #e9e9ef;
  --muted: #a7a7b5;
  --accent: #7c9cff;
  --accent-2: #60dfa7;
  --danger: #ff7a7a;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.7;
}

img, svg { display: block; max-width: 100%; height: auto; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 720px; margin: 0 auto; padding: 16px; }

header.site-header { position: sticky; top: 0; z-index: 50; background: rgba(11,11,15,0.75); backdrop-filter: blur(8px); border-bottom: 1px solid #22232b; }
.site-header .inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 16px; }
.brand { font-weight: 700; letter-spacing: 0.2px; }
.nav a { color: var(--text); opacity: 0.9; margin-left: 12px; }
.nav a:hover { opacity: 1; }

main { padding: 8px 0 40px; }

h1 { font-size: 1.6rem; margin: 18px 0 8px; line-height: 1.3; }
h2 { font-size: 1.2rem; margin: 24px 0 8px; line-height: 1.4; }
h3 { font-size: 1rem; margin: 20px 0 8px; line-height: 1.4; color: var(--muted); }
p { margin: 10px 0; color: #d8d8df; }
small, .muted { color: var(--muted); }

.hero { padding: 24px 16px; background: linear-gradient(180deg, rgba(124,156,255,0.08), rgba(0,0,0,0)); border-radius: 12px; }
.hero h1 { font-size: 1.8rem; margin-top: 0; }
.hero p { font-size: 0.95rem; }

.card-list { display: grid; grid-template-columns: 1fr; gap: 12px; margin-top: 8px; }
.card { display: block; background: var(--surface); border: 1px solid #22232b; border-radius: 12px; padding: 14px; }
.card h3 { margin: 0 0 6px; color: var(--text); }
.card .desc { color: var(--muted); font-size: 0.95rem; }

.btn { display: inline-block; padding: 10px 14px; border-radius: 10px; border: 1px solid #2c2d37; background: #171923; color: var(--text); font-weight: 600; }
.btn:hover { background: #1b1e2a; text-decoration: none; }
.btn.primary { background: #1a2240; border-color: #2c396c; color: #e9efff; }
.btn.primary:hover { background: #1c2650; }

.section { margin-top: 24px; }
.grid { display: grid; gap: 8px; }
.grid.two { grid-template-columns: 1fr; }

.list { padding-left: 18px; }
.list li { margin: 6px 0; }

footer.site-footer { border-top: 1px solid #22232b; padding: 20px 16px; color: var(--muted); text-align: center; }

/* legal pages */
.legal h1 { margin-top: 0; }
.legal time { color: var(--muted); }
.legal .toc { background: #15171f; border: 1px solid #22232b; border-radius: 12px; padding: 12px; }
.legal .toc li { margin: 6px 0; }
.legal section { margin: 20px 0; }
.legal h2 { border-left: 3px solid var(--accent-2); padding-left: 8px; }
.legal a { word-break: break-all; }

/* responsive */
@media (min-width: 720px) {
  .card-list { grid-template-columns: 1fr 1fr; }
  .grid.two { grid-template-columns: 1fr 1fr; }
}

/* print for legal */
@media print {
  body { background: white; color: black; }
  a { color: black; text-decoration: underline; }
  header.site-header, footer.site-footer { display: none; }
  .container { max-width: none; padding: 0; }
}


/* --- Enhanced design system additions --- */
:root {
  --ring: rgba(124,156,255,0.45);
}

/* focus visibility */
*:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; box-shadow: 0 0 0 4px var(--ring); }

/* links */
a { text-underline-offset: 2px; }

/* hero variants */
.hero-home { position: relative; overflow: hidden; border: 1px solid #22232b; }
.hero-home:before { content: ""; position: absolute; inset: -20% -10%; background: radial-gradient(600px 200px at 20% -20%, rgba(124,156,255,0.18), rgba(0,0,0,0)), radial-gradient(600px 200px at 110% 20%, rgba(96,223,167,0.12), rgba(0,0,0,0)); pointer-events: none; }
.kicker { display: inline-block; font-size: 0.78rem; letter-spacing: 0.04em; color: var(--muted); background: #15171f; padding: 4px 8px; border: 1px solid #22232b; border-radius: 999px; }
.hero .title { font-size: 2rem; margin: 10px 0 6px; }
.hero .subtitle { color: #cfd1dd; font-size: 1rem; }
.cta-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }

/* buttons */
.btn { transition: transform 120ms ease, background 120ms ease, box-shadow 120ms ease; }
.btn:hover { transform: translateY(-1px); }
.btn.secondary { background: transparent; border-color: #3a3b46; color: #d8daf0; }
.btn.secondary:hover { background: #151823; }

/* cards */
.card { transition: transform 160ms ease, box-shadow 160ms ease; }
.card:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.25); }
.card .meta { display: flex; gap: 8px; align-items: center; margin-top: 8px; }
.badge { display: inline-block; font-size: 0.78rem; color: #bfc3da; background: #171923; border: 1px solid #2b2d38; padding: 4px 8px; border-radius: 999px; }

/* feature lists */
.feature-list { list-style: none; padding: 0; margin: 0; }
.feature-list li { display: flex; gap: 10px; align-items: flex-start; padding: 8px 0; border-bottom: 1px dashed #242632; }
.feature-list li:last-child { border-bottom: 0; }
.icon-check { width: 18px; height: 18px; display: inline-flex; align-items: center; justify-content: center; border-radius: 50%; background: rgba(96,223,167,0.12); border: 1px solid rgba(96,223,167,0.45); color: var(--accent-2); font-weight: 700; font-size: 12px; line-height: 1; flex: 0 0 auto; }

/* chips */
.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip { display: inline-flex; align-items: center; gap: 6px; border-radius: 999px; padding: 4px 10px; font-size: 0.78rem; border: 1px solid #2c2d37; background: #141622; color: #c9ccdc; }
.chip.p0 { border-color: #3553b8; background: #172040; color: #e3e9ff; }
.chip.p1 { border-color: #3c6b50; background: #13221b; color: #cfeedd; }
.chip.p2 { border-color: #6a5a2d; background: #241f12; color: #f1e7c6; }
.chip.p3 { border-color: #514b5c; background: #1f1c26; color: #ddd3f2; }

/* app hero */
.app-hero { padding: 28px 16px; background: linear-gradient(180deg, rgba(96,223,167,0.08), rgba(0,0,0,0)); border: 1px solid #22232b; border-radius: 12px; }
.app-hero h1 { font-size: 2.2rem; margin: 6px 0 4px; letter-spacing: .2px; }
.app-hero p { font-size: 0.98rem; color: #cfd1dd; }

/* app store style blocks */
.subtitle { font-size: 1.05rem; color: #cfd1dd; margin: 6px 0 0; }
.lead { font-size: 1rem; color: #e1e3ee; margin: 10px 0; }
.section h2 .small { font-size: .85rem; color: var(--muted); font-weight: 600; }
.slides .caption { font-size: .9rem; color: #cfd1dd; margin-top: 6px; }

/* polish visuals */
.tag-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.tag { display: inline-block; padding: 4px 10px; border-radius: 999px; border: 1px solid #2c2d37; background: #141722; color: #cfd1dd; font-size: .8rem; }
.divider { height: 1px; background: #22232b; margin: 16px 0; border: 0; }
.feature .desc { color: #d6d8e6; }
.section .kicker { color: var(--muted); font-weight: 700; font-size: .78rem; letter-spacing: .04em; }
.screens-wrap { background: #11131a; border: 1px solid #22232b; border-radius: 12px; padding: 10px; }

/* layout grids */
.grid.auto { display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 720px) {
  .grid.auto { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

/* prose for legal and long-form */
.prose { font-size: 1rem; line-height: 1.9; }
.prose h1 { font-size: 1.9rem; }
.prose h2 { font-size: 1.25rem; margin-top: 28px; }
.prose h3 { font-size: 1.05rem; color: #b9bbca; }
.prose p, .prose li { color: #e1e3ee; }
.prose .list { padding-left: 20px; }
.prose .toc { position: relative; }
.prose .toc:before { content: ""; position: absolute; inset: 0; border-radius: 12px; box-shadow: inset 0 0 0 1px rgba(255,255,255,0.02); pointer-events: none; }

/* marketing components */
.store-badges { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }
.badge-store { display: inline-flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 12px; border: 1px solid #2c2d37; background: #0f1320; color: #e9efff; font-weight: 700; letter-spacing: .2px; }
.badge-store .sub { display: block; font-size: .68rem; opacity: .8; font-weight: 600; }
.badge-store .main { display: block; font-size: .98rem; }

.features { display: grid; gap: 12px; margin-top: 12px; }
.feature { background: var(--surface); border: 1px solid #22232b; border-radius: 12px; padding: 14px; }
.feature h3 { margin: 0 0 6px; }
.feature .icon { font-size: 1.2rem; opacity: .9; }

.steps { counter-reset: step; display: grid; gap: 10px; }
.step { background: #141722; border: 1px solid #22232b; border-radius: 12px; padding: 12px 12px 12px 44px; position: relative; }
.step:before { counter-increment: step; content: counter(step); position: absolute; left: 12px; top: 12px; width: 24px; height: 24px; border-radius: 999px; background: #1a2240; color: #e9efff; display: grid; place-items: center; font-weight: 700; border: 1px solid #2c396c; }

.faq { margin-top: 12px; }
.faq details { background: #141722; border: 1px solid #22232b; border-radius: 12px; padding: 10px 12px; margin: 8px 0; }
.faq summary { cursor: pointer; font-weight: 700; }
.faq p { margin: 8px 0 0; }

.plans { display: grid; gap: 12px; margin-top: 12px; }
.plan { background: var(--surface); border: 1px solid #22232b; border-radius: 14px; padding: 16px; }
.plan h3 { margin-top: 0; }
.price { font-size: 1.4rem; font-weight: 800; letter-spacing: 0.2px; }
.plan .list { margin-top: 8px; }

@media (min-width: 720px) {
  .features { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .steps { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .plans { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

/* image placeholders */
.placeholder { background: #12131a; border: 1px dashed #2a2c37; color: #8d90a6; display: grid; place-items: center; border-radius: 12px; text-align: center; }
.ph-hero { width: 100%; height: 160px; margin-top: 12px; }
.ph-icon { width: 88px; height: 88px; border-radius: 20px; }
.screens { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 12px; }
.ph-screen { aspect-ratio: 9/19.5; border-radius: 18px; }
@media (min-width: 720px) {
  .ph-hero { height: 220px; }
  .screens { grid-template-columns: repeat(3, minmax(0,1fr)); }
}

/* slider */
.slider { position: relative; margin-top: 8px; }
.slides { display: grid; grid-auto-flow: column; grid-auto-columns: 82%; gap: 8px; overflow-x: auto; scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
.slides::-webkit-scrollbar { display: none; }
.slide { scroll-snap-align: center; }
.slider-dots { display: flex; justify-content: center; gap: 6px; margin-top: 6px; }
.slider-dot { width: 6px; height: 6px; border-radius: 999px; background: #2c2d37; border: 1px solid #3a3b46; }
.slider-dot.active { background: var(--accent); border-color: var(--accent); }
@media (min-width: 720px) {
  .slides { grid-auto-columns: 40%; gap: 10px; }
}

/* linktree style */
.profile { display: grid; justify-items: center; gap: 10px; text-align: center; padding: 18px 12px; }
.avatar { width: 96px; height: 96px; border-radius: 999px; background: #161a28; border: 1px solid #272a36; display: grid; place-items: center; color: #9aa0b8; font-weight: 800; }
.profile h1 { margin: 8px 0 0; font-size: 1.3rem; }
.profile .bio { color: #cfd1dd; font-size: .95rem; }
.social { display: flex; gap: 10px; justify-content: center; margin-top: 6px; }
.icon-btn { width: 36px; height: 36px; border-radius: 999px; border: 1px solid #2c2d37; background: #141722; color: #e9e9ef; display: grid; place-items: center; font-weight: 800; }
.icon-btn:hover { background: #171b27; }
.link-list { display: grid; gap: 10px; margin-top: 12px; }
.link-item { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 12px 14px; border-radius: 12px; border: 1px solid #2c2d37; background: #141722; color: #e9e9ef; font-weight: 700; }
.link-item:hover { background: #171b27; text-decoration: none; }
.link-item .left { display: flex; align-items: center; gap: 10px; }
.link-item .emoji { font-size: 1.1rem; }
.link-item .label { letter-spacing: 0.2px; }
.link-item .arrow { opacity: .7; }

/* list card tweaks */
.arrow { opacity: .7; color: var(--muted); }