/* tokens */
:root {
  color-scheme: dark;
  --bg: #080f1b;
  --surface: #0e1826;
  --surface-raised: #142130;
  --text: #f0f4f8;
  --text-muted: #a4b2c3;
  --border: rgba(170, 194, 216, .14);
  --accent: #79dcec;
  --accent-secondary: #9ce5b3;
  --radius: 20px;
  --container: 1200px;
}

/* reset/base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
body, button { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
h1, h2, h3, h4, p { margin: 0; }
h1, h2, h3, h4 { line-height: 1.15; }
h2 { font-size: clamp(1.8rem, 3.3vw, 2.65rem); font-weight: 650; letter-spacing: -.045em; text-wrap: balance; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font-size: inherit; cursor: pointer; }
img, svg { display: block; max-width: 100%; }
img { height: auto; }
button, a { -webkit-tap-highlight-color: transparent; }
button { border: 0; }
::selection { background: var(--accent); color: var(--bg); }
[hidden] { display: none !important; }

/* layout */
.container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
.section-space { padding-block: 64px; }
.eyebrow { display: flex; align-items: center; gap: 10px; font-size: .7rem; font-weight: 650; letter-spacing: .16em; text-transform: uppercase; }
.section-index { color: var(--accent); margin-right: 6px; font-weight: 500; }
.status-dot { flex: 0 0 6px; width: 6px; height: 6px; background: currentColor; border-radius: 50%; }
.icon { flex-shrink: 0; width: 20px; height: 20px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 48px; padding: 13px 18px; border: 1px solid var(--border); border-radius: 8px; font-size: .85rem; line-height: 1.4; font-weight: 650; transition: background .18s, border-color .18s, transform .18s; }
.button-primary { color: var(--bg); background: var(--accent); border-color: var(--accent); }
.button-primary:hover { background: #a4e9f3; border-color: #a4e9f3; transform: translateY(-2px); }
.text-link { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; font-size: .85rem; }
.text-link:hover { color: var(--accent); }
.text-link span { text-decoration: underline; text-decoration-color: transparent; text-underline-offset: 5px; }
.text-link:hover span { text-decoration-color: currentColor; }

/* header */
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(8, 15, 27, .96); border-bottom: 1px solid var(--border); }
@supports (backdrop-filter: blur(12px)) {
  .site-header { background: rgba(8, 15, 27, .88); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
}
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 9px; min-height: 44px; font-size: 1.25rem; font-weight: 750; letter-spacing: -.035em; line-height: 1.05; }
.brand img { flex-shrink: 0; }
.brand-detail { display: block; font-size: .62rem; font-weight: 500; letter-spacing: .03em; margin-top: 5px; }
.header-controls { display: flex; align-items: center; gap: 8px; }
.locale-switch { display: flex; padding: 3px; border: 1px solid var(--border); border-radius: 8px; }
.locale-switch button { min-width: 40px; min-height: 44px; border-radius: 5px; background: transparent; color: var(--text-muted); font-size: .72rem; font-weight: 650; }
.locale-switch button[aria-pressed="true"] { background: var(--surface-raised); color: var(--accent); }
.locale-switch button:hover { color: var(--text); }
.menu-toggle { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); }
.menu-toggle[aria-expanded="true"] { border-color: var(--accent); color: var(--accent); }
.main-nav { order: 3; flex: 0 0 100%; display: flex; gap: 24px; padding-block: 0 12px; }
.main-nav a, .footer-nav a { display: inline-flex; align-items: center; min-height: 44px; font-size: .85rem; color: var(--text-muted); transition: color .18s; }
.main-nav a:hover, .footer-nav a:hover { color: var(--accent); }
.menu-ready .main-nav { display: none; }
.menu-ready .main-nav.is-open { display: flex; border-top: 1px solid var(--border); padding-block: 12px; }

/* hero */
.hero { position: relative; display: grid; padding-top: 48px; }
.hero .eyebrow { color: var(--accent); margin-bottom: 27px; letter-spacing: .12em; font-size: .72rem; }
h1 { font-size: clamp(2.6rem, 9.7vw, 6.6rem); line-height: .98; font-weight: 780; letter-spacing: -.064em; }
h1 > span { display: block; color: #8eacc2; }
.title-period { color: var(--accent); }
.hero-subtitle { max-width: 580px; margin-top: 26px; font-size: clamp(1.15rem, 2vw, 1.5rem); line-height: 1.5; letter-spacing: -.018em; text-wrap: pretty; }
.hero-description { max-width: 530px; margin-top: 17px; font-size: .95rem; color: var(--text-muted); line-height: 1.8; }
.hero-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; margin-top: 28px; }
.latest-link { color: var(--text-muted); font-size: .78rem; }
.hero-art { display: none; }
.hero-topics { display: grid; gap: 14px; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); margin-top: 42px; padding-block: 22px; }
.hero-topics > span { display: flex; align-items: center; gap: 12px; color: #bac7d6; font-size: .76rem; letter-spacing: .025em; }
.topic-number { color: #8c9bae; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .62rem; }
.hero-topics .topic-mark { display: none; }

/* featured app */
.section-heading { display: flex; flex-direction: column; gap: 16px; margin-bottom: 30px; }
.section-heading .eyebrow { color: var(--text-muted); margin-bottom: 16px; }
.section-note { color: var(--text-muted); font-size: .82rem; max-width: 230px; }
.featured-app { display: grid; border: 1px solid rgba(156, 229, 179, .2); border-radius: var(--radius); overflow: hidden; background: linear-gradient(120deg, #111f25, #0e1923 75%); scroll-margin-top: 100px; }
.featured-visual { position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 28px; min-height: 280px; overflow: hidden; background: radial-gradient(ellipse at 50% 40%, rgba(103, 166, 121, .12), transparent 68%); border-bottom: 1px solid rgba(156, 229, 179, .1); }
.featured-visual::before, .featured-visual::after { content: ""; position: absolute; width: 300px; height: 300px; border: 1px solid rgba(156, 229, 179, .07); border-radius: 50%; pointer-events: none; }
.featured-visual::after { width: 390px; height: 390px; }
.release-badge { display: inline-flex; align-items: center; gap: 8px; align-self: flex-start; padding: 6px 10px; border: 1px solid rgba(156, 229, 179, .22); border-radius: 5px; background: #182b25; color: #b6eec8; font-size: .72rem; font-weight: 600; letter-spacing: .055em; text-transform: uppercase; z-index: 1; }
.featured-icon-frame { position: relative; z-index: 1; width: 156px; margin: 25px 0 22px; transform: rotate(-5deg); border-radius: 24%; box-shadow: 0 18px 40px #0004; }
.manager-icon { width: 100%; border-radius: 24%; }
.visual-wordmark { position: relative; z-index: 1; text-align: center; font-size: .72rem; letter-spacing: .14em; font-weight: 700; }
.visual-wordmark span { display: block; margin-top: 6px; color: #a4beb0; font-size: .6rem; letter-spacing: .24em; font-weight: 400; }
.featured-content { padding: 28px 22px; }
.app-category { color: var(--text-muted); font-size: .7rem; font-weight: 550; letter-spacing: .055em; text-transform: uppercase; line-height: 1.5; }
.featured-content .app-category { color: var(--accent-secondary); margin-bottom: 14px; font-size: .72rem; letter-spacing: .12em; }
.featured-content h3 { font-size: clamp(1.8rem, 3.3vw, 2.6rem); letter-spacing: -.045em; font-weight: 680; }
.featured-content h3 span { color: #aac7b6; }
.featured-tagline { margin-top: 18px; font-size: clamp(1.05rem, 1.5vw, 1.17rem); max-width: 530px; line-height: 1.6; text-wrap: pretty; }
.featured-description { color: var(--text-muted); font-size: .88rem; line-height: 1.85; margin-top: 16px; max-width: 590px; }
.feature-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 7px; margin: 22px 0 26px; padding: 0; }
.feature-tags li { padding: 4px 9px; border: 1px solid rgba(156, 229, 179, .14); border-radius: 5px; color: #bfceca; font-size: .69rem; }
.button-manager { background: var(--accent-secondary); border-color: var(--accent-secondary); color: #10241a; }
.button-manager:hover { background: #bef2ce; border-color: #bef2ce; transform: translateY(-2px); }
.purchase-note { color: #a4b5ae; font-size: .75rem; line-height: 1.7; max-width: 470px; margin-top: 16px; }

/* apps */
.tips-collection { margin-top: 52px; }
.collection-heading { margin-bottom: 26px; }
.collection-heading h3 { font-size: 1.65rem; font-weight: 600; letter-spacing: -.035em; }
.collection-heading p { font-size: .9rem; color: var(--text-muted); margin-top: 12px; }
.apps-grid { display: grid; gap: 16px; }
.app-card { min-width: 0; display: flex; flex-direction: column; align-items: flex-start; padding: 24px; border: 1px solid var(--border); background: var(--surface); border-radius: 14px; transition: border-color .2s, transform .2s, background .2s; }
.app-card:hover { background: #111d2b; border-color: rgba(121, 220, 236, .3); transform: translateY(-3px); }
.app-icon-plate { width: 76px; height: 76px; border-radius: 16px; background: #eef2ee; padding: 6px; margin-bottom: 24px; }
.app-icon-plate img { width: 100%; height: 100%; object-fit: contain; }
.app-card h4 { font-size: 1.14rem; letter-spacing: -.025em; line-height: 1.4; font-weight: 630; margin-top: 10px; }
.app-description { font-size: .9rem; line-height: 1.8; color: var(--text-muted); margin-block: 14px 25px; }
.app-card .play-link { width: 100%; margin-top: auto; justify-content: space-between; font-size: .8rem; padding-inline: 13px; }
.app-card .play-link:hover { background: #1a2b3b; border-color: #476674; }
.app-card .play-link .icon { width: 17px; height: 17px; }

/* studio */
.studio { background: linear-gradient(110deg, #0d1724, #0a121f); border-block: 1px solid var(--border); }
.studio-grid { display: grid; gap: 36px; }
.studio .eyebrow { color: var(--text-muted); margin-bottom: 20px; }
.studio h2 { white-space: pre-line; line-height: 1.2; }
.studio-description { color: var(--text-muted); font-size: .95rem; line-height: 1.85; margin-top: 22px; max-width: 470px; }
.principles { display: grid; gap: 0; }
.principle { display: flex; align-items: flex-start; gap: 18px; padding-block: 24px; border-bottom: 1px solid var(--border); }
.principle:first-child { padding-top: 0; }
.principle:last-child { border: 0; padding-bottom: 0; }
.principle-icon { display: flex; align-items: center; justify-content: center; flex: 0 0 44px; width: 44px; height: 44px; border: 1px solid var(--border); border-radius: 10px; color: var(--accent); background: var(--surface); }
.principle-icon svg { width: 22px; height: 22px; }
.principle h3 { font-size: 1rem; font-weight: 600; margin-top: 2px; }
.principle p { color: var(--text-muted); font-size: .85rem; line-height: 1.7; margin-top: 7px; }

/* contact */
.contact-panel { display: grid; gap: 30px; padding: 30px 24px; border: 1px solid var(--border); border-radius: var(--radius); background: radial-gradient(ellipse at 100% 100%, #112a3755, transparent 65%), var(--surface); }
.contact .eyebrow { color: var(--text-muted); margin-bottom: 18px; }
.contact-description { max-width: 430px; color: var(--text-muted); font-size: .9rem; margin-top: 14px; line-height: 1.8; }
.contact-link { display: inline-flex; align-items: center; justify-content: space-between; align-self: center; gap: 12px; padding-block: 12px; border-bottom: 1px solid #476675; color: var(--accent); font-size: clamp(.9rem, 1.65vw, 1.28rem); font-weight: 500; letter-spacing: -.02em; transition: color .18s, border-color .18s; }
.contact-link span { overflow-wrap: anywhere; }
.contact-link .icon { width: 26px; height: 26px; }
.contact-link:hover { color: #cbf6ff; border-color: var(--accent); }

/* footer */
.site-footer { border-top: 1px solid var(--border); padding-block: 30px 24px; }
.footer-top { display: flex; flex-wrap: wrap; align-items: center; gap: 24px; }
.footer-top .brand { font-size: 1.05rem; }
.footer-top .brand-detail { font-size: .57rem; }
.footer-nav { display: flex; gap: 22px; order: 3; flex-basis: 100%; }
.back-top { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; margin-left: auto; border: 1px solid var(--border); border-radius: 50%; color: var(--text-muted); }
.back-top:hover { border-color: var(--accent); color: var(--accent); }
.footer-bottom { display: flex; flex-direction: column; gap: 10px; margin-top: 24px; color: var(--text-muted); font-size: .75rem; }

/* responsive */
@media (min-width: 480px) {
  .container { width: min(var(--container), calc(100% - 56px)); }
  .hero-topics { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
  .hero-topics > span { align-items: flex-start; }
  .featured-content { padding: 36px; }
  .contact-panel { padding: 36px; }
}
@media (min-width: 640px) {
  .apps-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
  .section-space { padding-block: 80px; }
  .hero-actions { flex-direction: row; flex-wrap: wrap; align-items: center; gap: 14px 24px; }
  .hero-topics { padding-block: 26px; }
  .hero-topics > span { font-size: .84rem; }
  .featured-visual { min-height: 300px; }
  .featured-icon-frame { width: 180px; }
  .release-badge { position: absolute; left: 28px; top: 28px; }
  .footer-nav { order: initial; flex-basis: auto; margin-left: auto; }
  .back-top { margin-left: 12px; }
  .footer-bottom { flex-direction: row; justify-content: space-between; gap: 32px; }
}
@media (min-width: 768px) {
  .container { width: min(var(--container), calc(100% - 80px)); }
  .header-inner { flex-wrap: nowrap; gap: 30px; min-height: 84px; }
  .main-nav, .menu-ready .main-nav, .menu-ready .main-nav.is-open { display: flex; order: initial; flex: initial; margin-left: auto; padding: 0; border: 0; gap: 30px; }
  .menu-toggle { display: none; }
  .hero { padding-top: 68px; }
  .hero-topics { margin-top: 52px; }
  .section-heading { flex-direction: row; justify-content: space-between; align-items: flex-end; gap: 40px; margin-bottom: 36px; }
  .section-note { text-align: right; flex: 0 0 210px; }
  .featured-app { grid-template-columns: minmax(0, .7fr) minmax(0, 1.3fr); }
  .featured-visual { border-bottom: 0; border-right: 1px solid rgba(156, 229, 179, .1); padding: 70px 28px; }
  .featured-icon-frame { width: min(100%, 220px); }
  .featured-content { padding: 38px 32px; }
  .studio-grid { grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
  .studio h2 { font-size: clamp(1.9rem, 3.6vw, 2.65rem); }
  .contact-panel { padding: 42px; }
}
@media (min-width: 1024px) {
  .hero { grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); align-items: center; column-gap: 32px; padding-top: 76px; }
  h1 { font-size: clamp(4.4rem, 7.4vw, 6.6rem); }
  .hero-art { display: block; position: relative; align-self: stretch; min-width: 0; max-height: 540px; margin-top: 12px; }
  .art-overline { display: flex; justify-content: space-between; padding: 20px 24px; color: #92a8ba; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .58rem; letter-spacing: .15em; }
  .playbook { width: 100%; height: auto; max-height: 430px; }
  .art-corner { position: absolute; width: 28px; height: 28px; border-color: #28434f; border-style: solid; }
  .art-corner-top { top: 0; left: 0; border-width: 1px 0 0 1px; }
  .art-corner-bottom { bottom: 0; right: 0; border-width: 0 1px 1px 0; }
  .art-caption { display: flex; align-items: center; gap: 12px; justify-content: center; color: var(--text-muted); font-size: .63rem; letter-spacing: .025em; padding: 12px 16px; }
  .art-line { height: 1px; width: 26px; background: var(--accent); opacity: .6; flex-shrink: 0; }
  .hero-topics { grid-column: 1 / -1; grid-template-columns: 1fr 1fr 1fr auto; margin-top: 62px; }
  .hero-topics .topic-mark { display: flex; color: #849aae; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .7rem; }
  .section-space { padding-block: 96px; }
  .featured-content { padding: 48px; }
  .featured-visual { padding: 80px 36px 55px; }
  .featured-icon-frame { width: 220px; margin-bottom: 35px; }
  .apps-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
  .app-card { padding: 22px; }
  .tips-collection { margin-top: 62px; }
  .collection-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 40px; }
  .collection-heading p { max-width: 390px; margin: 0; font-size: .85rem; }
  .studio-grid { gap: 100px; }
  .contact-panel { grid-template-columns: 1.1fr 1fr; align-items: center; gap: 60px; padding: 52px; }
}
@media (min-width: 1280px) {
  .hero-actions { gap: 14px 20px; }
  .hero-actions .button { font-size: .82rem; padding-inline: 17px; }
  .latest-link { font-size: .76rem; }
  .app-card { padding: 26px; }
}
@media (max-width: 359px) {
  .container { width: calc(100% - 32px); }
  .brand { gap: 5px; }
  .brand img { width: 32px; }
  .header-inner { gap: 8px; }
  .header-controls { gap: 6px; }
  .locale-switch button { min-width: 36px; }
  .contact-panel { padding-inline: 20px; }
}

/* accessibility */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
main:focus { outline: none; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 100; transform: translateY(-160%); padding: 12px 20px; border-radius: 6px; background: var(--accent); color: var(--bg); font-weight: 650; }
.skip-link:focus { transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .button:hover, .app-card:hover { transform: none; }
}
@media (forced-colors: active) {
  .button, .locale-switch button[aria-pressed="true"], .feature-tags li { border: 1px solid ButtonText; }
}