/* MOSK STUDIO home: ink, one red dot, mono labels. Shared by / and /en/ and /privacy/. */
:root {
  --ink: #0b0b10; --ink-2: #2a2a33; --muted: #6b6b76; --line: #e7e7ec; --soft: #f6f6f8; --bg: #ffffff;
  --red: #ff2442; --red-soft: #fff0f2;
  --font: "Google Sans", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "Roboto Mono", "JetBrains Mono", Consolas, ui-monospace, monospace;
  --wrap: 1120px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--ink); font: 16px/1.7 var(--font); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--mono); letter-spacing: .08em; }
.dot { display: inline-block; width: .2em; height: .2em; border-radius: 50%; background: var(--red); margin-left: .06em; vertical-align: baseline; }

/* header */
.header { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.86); backdrop-filter: saturate(1.4) blur(12px); border-bottom: 1px solid transparent; transition: border-color .2s; }
.header.scrolled { border-color: var(--line); }
.header .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; font-family: var(--mono); font-weight: 700; letter-spacing: .14em; font-size: 15px; }
.brand-mark { width: 34px; height: 34px; border-radius: 10px; background: var(--ink); color: #fff; display: grid; place-items: center; position: relative; font: 800 19px/1 var(--font); letter-spacing: -.04em; }
.brand-mark::after { content: ""; position: absolute; right: 5px; bottom: 7px; width: 5px; height: 5px; border-radius: 50%; background: var(--red); }
.brand small { color: var(--muted); font-weight: 400; }
.nav { display: flex; align-items: center; gap: 28px; font-size: 15px; color: var(--ink-2); }
.nav a:hover { color: var(--ink); }
.nav .lang { font-family: var(--mono); font-size: 13px; padding: 6px 12px; border: 1px solid var(--line); border-radius: 99px; }
@media (max-width: 640px) { .nav a:not(.lang) { display: none; } .brand small { display: none; } }

/* hero */
.hero { padding: 112px 0 96px; position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 56px 56px; opacity: .5;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 30%, transparent 75%); mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 30%, transparent 75%); }
.hero .wrap { position: relative; }
.eyebrow { font-family: var(--mono); font-size: 13px; letter-spacing: .22em; color: var(--muted); display: inline-flex; align-items: center; gap: 10px; }
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--red); }
.hero h1 { font-size: clamp(44px, 8vw, 92px); line-height: 1.05; font-weight: 800; letter-spacing: -.035em; margin: 22px 0 26px; }
.hero h1 .dot { width: .16em; height: .16em; }
.hero .lead { font-size: clamp(17px, 2vw, 20px); color: var(--ink-2); max-width: 640px; }
.hero-cta { display: flex; gap: 12px; margin-top: 36px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 46px; padding: 0 22px; border-radius: 12px; font-weight: 600; font-size: 15px; transition: transform .15s, background .15s, border-color .15s; }
.btn:hover { transform: translateY(-1px); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #24242c; }
.btn-line { border: 1px solid var(--line); background: #fff; }
.btn-line:hover { border-color: var(--ink); }
.btn-red { background: var(--red); color: #fff; }

/* sections */
section { padding: 88px 0; }
section.soft { background: var(--soft); }
.sec-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 40px; flex-wrap: wrap; }
.sec-head h2 { font-size: clamp(28px, 4vw, 40px); letter-spacing: -.02em; line-height: 1.2; }
.sec-head p { color: var(--muted); max-width: 440px; }

/* products */
.products { display: grid; grid-template-columns: 1.6fr 1fr; gap: 20px; }
@media (max-width: 860px) { .products { grid-template-columns: 1fr; } }
.product { background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 32px; display: grid; grid-template-columns: auto 1fr; gap: 24px; transition: border-color .2s, box-shadow .2s; }
.product:hover { border-color: #cfcfd6; box-shadow: 0 24px 48px -32px rgba(11,11,16,.35); }
.product-icon { width: 72px; height: 72px; border-radius: 18px; box-shadow: 0 12px 24px -14px rgba(255,36,66,.7); }
.product-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.tag { font-family: var(--mono); font-size: 12px; letter-spacing: .06em; padding: 3px 10px; border-radius: 99px; border: 1px solid var(--line); color: var(--ink-2); }
.tag.live { border-color: #bfe8d2; background: #effaf4; color: #137a4b; }
.product h3 { font-size: 24px; letter-spacing: -.01em; }
.product p { color: var(--ink-2); margin-top: 6px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 24px; }
.chips span { font-size: 13px; padding: 4px 12px; border-radius: 8px; background: var(--soft); color: var(--ink-2); }
.product-cta { display: flex; gap: 10px; flex-wrap: wrap; }
.product-cta .btn { height: 42px; font-size: 14px; }
@media (max-width: 520px) { .product { grid-template-columns: 1fr; padding: 24px; } }
.product.next { border-style: dashed; background: transparent; grid-template-columns: 1fr; align-content: center; justify-items: start; }
.product.next:hover { box-shadow: none; border-color: var(--line); }
.next-mark { width: 56px; height: 56px; border-radius: 16px; border: 1px dashed #c9c9d1; display: grid; place-items: center; color: var(--muted); font: 300 30px/1 var(--font); }
.product.next p { color: var(--muted); }

/* principles */
.principles { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
@media (max-width: 760px) { .principles { grid-template-columns: 1fr; } }
.principle { padding: 32px 28px 8px 0; }
.principle .n { font-family: var(--mono); font-size: 13px; color: var(--red); letter-spacing: .1em; }
.principle h3 { font-size: 20px; margin: 10px 0 8px; }
.principle p { color: var(--muted); }

/* closing */
.closing { background: var(--ink); color: #fff; text-align: center; padding: 96px 0; }
.closing h2 { font-size: clamp(30px, 5vw, 48px); letter-spacing: -.02em; line-height: 1.2; }
.closing p { color: rgba(255,255,255,.62); margin: 14px auto 30px; max-width: 520px; }
.closing .btn-line { background: transparent; color: #fff; border-color: rgba(255,255,255,.25); }
.closing .btn-line:hover { border-color: #fff; }
.closing .hero-cta { justify-content: center; }

/* footer */
.footer { padding: 40px 0 48px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }
.footer .wrap { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer nav { display: flex; gap: 22px; flex-wrap: wrap; }
.footer a:hover { color: var(--ink); }

/* legal pages */
.doc { max-width: 760px; margin: 0 auto; padding: 64px 24px 96px; }
.doc h1 { font-size: 36px; letter-spacing: -.02em; }
.doc .muted { color: var(--muted); font-size: 14px; margin: 8px 0 28px; }
.doc h2 { font-size: 19px; margin: 28px 0 6px; }
.doc p, .doc li { color: var(--ink-2); }
.doc ul { padding-left: 20px; }
.doc a { color: var(--red); }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 56px 0; }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }