:root {
  --bg: #0f172a;
  --fg: #f8fafc;
  --dim: #94a3b8;
  --line: #243049;
  --pad: clamp(20px, 4.5vw, 56px);
  --max: 1280px;
  --panel-h: clamp(440px, 42vw, 600px);
}
*, *::before, *::after { box-sizing: border-box; }
html { background: var(--bg); color: var(--fg); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
:lang(ko) body { font-family: -apple-system, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif; word-break: keep-all; line-height: 1.8; }
:lang(ja) body { font-family: -apple-system, "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif; line-break: strict; line-height: 1.85; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration-color: var(--dim); text-decoration-thickness: 1px; text-underline-offset: 0.25em; }
a:hover { text-decoration-color: var(--fg); }
:focus-visible { outline: 2px solid var(--fg); outline-offset: 4px; }
h1, h2, p, ul { overflow-wrap: anywhere; }
h1, h2 { text-wrap: balance; }
p { text-wrap: pretty; }
:lang(ja) h1, :lang(ja) h2, :lang(ja) p, :lang(ja) .app-list__desc { word-break: auto-phrase; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: var(--pad); top: 8px; background: var(--fg); color: var(--bg); padding: 8px 12px; z-index: 10; }

/* Header */
.site-header {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 4px 32px; max-width: var(--max); margin: 0 auto; padding: 12px var(--pad);
}
.brand { font-weight: 600; font-size: 17px; letter-spacing: -0.01em; text-decoration: none; padding: 10px 0; }
.site-header nav { display: flex; gap: 8px; margin-right: auto; font-size: 15px; color: var(--dim); }
.site-header nav a, .lang a { text-decoration: none; display: inline-flex; align-items: center; min-height: 44px; padding: 0 10px; }
.site-header nav a:hover, .lang a:hover { color: var(--fg); }
.lang { display: flex; gap: 0; font-size: 13px; letter-spacing: 0.04em; color: var(--dim); margin-right: -10px; }
.lang [aria-current] { color: var(--fg); font-weight: 600; text-decoration: underline; text-underline-offset: 0.4em; text-decoration-thickness: 1px; }

.lang-suggest {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 6px var(--pad); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); font-size: 14px;
}
.lang-suggest[hidden] { display: none; }
.lang-suggest button { background: none; border: 0; color: var(--dim); font: inherit; cursor: pointer; min-height: 44px; padding: 0 8px; }

.hero, .about, .product, .site-footer { max-width: var(--max); margin: 0 auto; padding-left: var(--pad); padding-right: var(--pad); }

/* Hero: left-aligned statement, explanation set to the right on wide screens */
.hero {
  display: grid; grid-template-columns: minmax(0, 1fr); gap: 28px clamp(32px, 6vw, 96px); align-items: end;
  padding-top: clamp(56px, 11vw, 144px); padding-bottom: clamp(48px, 8vw, 112px);
}
.hero h1 { margin: 0; font-size: clamp(36px, 7.2vw, 96px); line-height: 1.02; font-weight: 600; letter-spacing: -0.035em; }
.hero p { margin: 0; max-width: 30em; color: var(--dim); font-size: clamp(16px, 1.5vw, 18px); }
:lang(ko) .hero h1, :lang(ja) .hero h1 { font-size: clamp(32px, 6vw, 76px); line-height: 1.18; letter-spacing: -0.02em; }
:lang(ja) .hero h1 { line-height: 1.22; }
@media (min-width: 960px) {
  .hero { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); }
  .hero p { padding-bottom: 0.6em; }
}

/* Showcase panels: fixed height, per-product media column so any aspect ratio sits well */
#apps { max-width: var(--max); margin: 0 auto; }
.panel {
  --m: 1fr; --t: 1fr;
  display: grid; grid-template-columns: minmax(0, var(--m)) minmax(0, var(--t));
  min-height: var(--panel-h); border-top: 1px solid var(--line);
}
.panel--reverse { grid-template-columns: minmax(0, var(--t)) minmax(0, var(--m)); }
.panel--reverse .panel__media { order: 2; }
.panel--taptap-golf { --m: 1fr; --t: 1fr; }
.panel--taptap-pickleball { --m: 0.8fr; --t: 1fr; }
.panel--mutual-loop { --m: 1.3fr; --t: 1fr; }
.panel__media { position: relative; display: block; overflow: hidden; min-height: 0; }
.panel__media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.panel--taptap-pickleball .panel__media img { left: 50%; width: auto; max-width: none; aspect-ratio: 839 / 1800; transform: translateX(-50%); object-fit: contain; }
.panel__text { display: flex; flex-direction: column; justify-content: flex-end; gap: 10px; padding: clamp(28px, 5vw, 72px); }
.kicker { margin: 0; font-size: 14px; letter-spacing: 0.02em; color: var(--dim); }
.panel h2 { margin: 0 0 4px; font-size: clamp(30px, 4.2vw, 56px); line-height: 1.08; font-weight: 600; letter-spacing: -0.03em; }
:lang(ko) .panel h2, :lang(ja) .panel h2 { line-height: 1.2; }
.panel h2 a { text-decoration: none; }
.panel h2 a:hover { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.15em; }
.panel p { margin: 0; max-width: 26em; color: var(--dim); }
.panel .kicker { color: var(--dim); }
.more { align-self: flex-start; display: inline-flex; align-items: center; min-height: 44px; margin-top: 6px; font-size: 15px; font-weight: 600; text-decoration-color: var(--fg); }

/* Secondary list */
.app-list { list-style: none; margin: 0; padding: 0 var(--pad); border-top: 1px solid var(--line); }
.app-list__item { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr) minmax(0, 0.8fr); gap: 4px 32px; align-items: baseline; padding: 24px 0; border-bottom: 1px solid var(--line); }
.app-list__name { font-size: clamp(20px, 2vw, 24px); font-weight: 600; letter-spacing: -0.02em; text-decoration: none; }
.app-list__name:hover { text-decoration: underline; text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
.app-list__desc { color: var(--dim); }
.app-list__meta { font-size: 14px; color: var(--dim); text-align: right; }
.site-line { margin: 0; padding: 28px var(--pad); color: var(--dim); font-size: 15px; border-bottom: 1px solid var(--line); }
.site-line__label { margin-right: 16px; color: var(--fg); font-weight: 600; }

/* About */
.about { display: grid; grid-template-columns: minmax(0, 1fr); gap: 20px 32px; padding-top: clamp(56px, 9vw, 120px); padding-bottom: clamp(56px, 9vw, 120px); }
.about h2 { margin: 0; font-size: 15px; font-weight: 400; color: var(--dim); line-height: 1.7; }
.about p { margin: 0; max-width: 32em; font-size: clamp(20px, 2.4vw, 30px); line-height: 1.5; letter-spacing: -0.015em; }
:lang(ko) .about p, :lang(ja) .about p { font-size: clamp(18px, 2.1vw, 26px); line-height: 1.75; letter-spacing: 0; }
@media (min-width: 960px) { .about { grid-template-columns: minmax(0, 1fr) minmax(0, 3fr); } }

/* Product detail */
.product { padding-top: 8px; padding-bottom: clamp(56px, 8vw, 112px); }
.crumb { margin: 0 0 clamp(24px, 4vw, 48px); font-size: 14px; color: var(--dim); }
.crumb a { display: inline-flex; align-items: center; min-height: 44px; }
.product__hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 72px); align-items: end; padding-bottom: clamp(32px, 5vw, 64px); border-bottom: 1px solid var(--line); }
.product__text { display: flex; flex-direction: column; gap: 10px; }
.product__hero h1 { margin: 0 0 8px; font-size: clamp(38px, 7vw, 96px); line-height: 1.02; font-weight: 600; letter-spacing: -0.035em; }
:lang(ko) .product__hero h1, :lang(ja) .product__hero h1 { line-height: 1.15; letter-spacing: -0.02em; font-size: clamp(34px, 6vw, 80px); }
.product__tagline { margin: 0; max-width: 24em; color: var(--dim); font-size: clamp(17px, 1.6vw, 20px); }
.product__media { display: flex; justify-content: flex-end; }
.product__media img { width: auto; height: auto; max-width: 100%; max-height: clamp(320px, 52vw, 640px); object-fit: contain; }
.product__hero:not(:has(.product__media)) { grid-template-columns: minmax(0, 1fr); padding-top: clamp(16px, 4vw, 56px); padding-bottom: clamp(40px, 7vw, 96px); }
.product__hero:not(:has(.product__media)) h1 { font-size: clamp(44px, 9vw, 128px); }
:lang(ko) .product__hero:not(:has(.product__media)) h1, :lang(ja) .product__hero:not(:has(.product__media)) h1 { font-size: clamp(38px, 7.5vw, 104px); }

.shots { padding: clamp(32px, 5vw, 64px) 0; border-bottom: 1px solid var(--line); }
.shots ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(8px, 3vw, 40px); max-width: 880px; }
.shots img { width: 100%; height: auto; border-radius: 50%; }

.product__body { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0 clamp(32px, 6vw, 96px); margin-top: clamp(32px, 5vw, 64px); }
.product__body > p { margin: 0; max-width: 34em; font-size: clamp(18px, 1.8vw, 22px); line-height: 1.6; letter-spacing: -0.01em; }
:lang(ko) .product__body > p, :lang(ja) .product__body > p { line-height: 1.85; letter-spacing: 0; }
.product__body h2, .google h2 { margin: 40px 0 12px; font-size: 18px; font-weight: 600; letter-spacing: -0.01em; color: var(--fg); }
.product__body ul, .google ul { margin: 0; padding-left: 1.1em; color: var(--dim); }
.product__body li { margin-bottom: 6px; padding-left: 4px; }
.product__body li::marker { color: var(--dim); }
@media (min-width: 960px) {
  .product__body { grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); }
  .product__body > p { grid-column: 1; grid-row: 1 / span 2; }
  .product__body h2 { grid-column: 2; grid-row: 1; margin-top: 4px; }
  .product__body ul { grid-column: 2; grid-row: 2; }
}

.stores { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 20px; margin-top: clamp(32px, 5vw, 56px); }
.badge { display: inline-flex; align-items: center; }
.badge img { width: auto; }
.badge--appstore img { height: 44px; }
.badge--play img { height: 66px; margin: 0 -11px; }
.web-link { display: inline-flex; align-items: center; min-height: 48px; padding: 0 24px; border: 1px solid var(--fg); font-weight: 600; text-decoration: none; }
.web-link:hover { background: var(--fg); color: var(--bg); }
.google { max-width: 46em; margin-top: clamp(40px, 6vw, 72px); padding-top: 8px; border-top: 1px solid var(--line); color: var(--dim); font-size: 15px; }
.google h2 { margin-top: 32px; }
.policy-link { margin: 32px 0 0; font-size: 14px; color: var(--dim); }

.site-footer { padding-top: 36px; padding-bottom: 48px; border-top: 1px solid var(--line); color: var(--dim); font-size: 14px; }
.site-footer p { margin: 0 0 8px; }
.site-footer__links { list-style: none; margin: 0 0 16px; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 28px; }

@media (max-width: 720px) {
  .panel, .panel--reverse { grid-template-columns: minmax(0, 1fr); min-height: 0; }
  .panel--reverse .panel__media { order: 0; }
  .panel__media { aspect-ratio: 1 / 1; }
  .panel--mutual-loop .panel__media { aspect-ratio: 16 / 10; }
  .panel--taptap-pickleball .panel__media { aspect-ratio: auto; height: min(112vw, 460px); }
  .panel__text { padding: 24px var(--pad) 44px; }
  .app-list__item { grid-template-columns: minmax(0, 1fr); }
  .app-list__meta { text-align: left; }
  .product__hero { grid-template-columns: minmax(0, 1fr); }
  .product__media { justify-content: flex-start; }
  .site-header nav { order: 3; width: 100%; margin-left: -10px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }