:root {
  --ink: #171915;
  --soft-ink: #5c6058;
  --paper: #f4f1ea;
  --warm: #e9e2d6;
  --white: #fffdf8;
  --accent: #d95536;
  --acid: #c7dd77;
  --line: rgba(23, 25, 21, .14);
  --serif: "Noto Serif SC", "Songti SC", serif;
  --sans: "DM Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.grain { position: fixed; inset: 0; z-index: 20; pointer-events: none; opacity: .16; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.13'/%3E%3C/svg%3E"); }
.site-header { height: 82px; padding: 0 4.5vw; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); position: relative; z-index: 10; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 600; letter-spacing: -.02em; }
.brand i { font-style: normal; color: #8a8c85; font-weight: 400; margin-left: 4px; }
.brand-mark { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; background: var(--ink); color: var(--paper); font-family: var(--serif); font-size: 17px; }
.site-header nav { display: flex; gap: 34px; font-size: 13px; color: var(--soft-ink); }
.site-header nav a { transition: color .2s; }
.site-header nav a:hover { color: var(--accent); }
.header-cta { font-size: 13px; font-weight: 600; border-bottom: 1px solid var(--ink); padding: 8px 0 6px; }
.header-cta span { color: var(--accent); margin-left: 6px; }

.hero { min-height: calc(100svh - 82px); display: grid; grid-template-columns: .86fr 1.14fr; overflow: hidden; }
.hero-copy { padding: clamp(70px, 10vw, 155px) 3vw 80px 7vw; display: flex; flex-direction: column; align-items: flex-start; }
.eyebrow { margin: 0 0 34px; color: #74776e; letter-spacing: .18em; font-size: 11px; font-weight: 600; text-transform: uppercase; display: flex; align-items: center; gap: 11px; }
.eyebrow span { display: inline-block; width: 22px; height: 1px; background: var(--accent); }
.hero h1, .statement blockquote, h2 { font-family: var(--serif); font-weight: 500; letter-spacing: -.055em; }
.hero h1 { margin: 0; font-size: clamp(68px, 8.4vw, 134px); line-height: .98; }
.hero h1 em, h2 em { font-style: normal; color: var(--accent); }
.hero-intro { margin: 44px 0 0; font-size: clamp(16px, 1.35vw, 20px); line-height: 1.9; color: var(--soft-ink); }
.primary-cta { margin-top: 48px; background: var(--ink); color: var(--white); min-width: 174px; height: 54px; padding: 0 22px; border-radius: 2px; display: flex; align-items: center; justify-content: space-between; font-size: 14px; transition: transform .25s, background .25s; }
.primary-cta:hover { transform: translateY(-3px); background: var(--accent); }
.primary-cta span { opacity: .55; font-size: 11px; }

.hero-visual { background: #222820; position: relative; min-height: 690px; display: grid; place-items: center; isolation: isolate; }
.hero-visual::before { content: "SUNWOO"; position: absolute; transform: rotate(90deg); right: -80px; top: 42%; color: rgba(255,255,255,.035); font-size: 144px; letter-spacing: .08em; font-weight: 600; }
.orbit { position: absolute; border: 1px solid rgba(199,221,119,.16); border-radius: 50%; }
.orbit-one { width: 620px; height: 620px; }
.orbit-two { width: 420px; height: 420px; border-color: rgba(217,85,54,.22); }
.phone { width: min(330px, 48%); min-width: 280px; height: 650px; padding: 12px; border-radius: 48px; background: #0e100e; box-shadow: 0 45px 90px rgba(0,0,0,.45), inset 0 0 0 1px rgba(255,255,255,.16); position: relative; z-index: 2; transform: rotate(3deg); }
.phone::after { content: ""; position: absolute; inset: 11px; border-radius: 38px; border: 1px solid rgba(255,255,255,.09); pointer-events: none; }
.phone-top { height: 45px; padding: 0 18px; display: flex; align-items: center; justify-content: space-between; color: #f4f1ea; font-size: 10px; }
.phone-top i { width: 77px; height: 23px; border-radius: 20px; background: #020302; }
.phone-top b { letter-spacing: 1px; }
.chat { height: 348px; border-radius: 30px 30px 0 0; background: #f1eee7; padding: 30px 18px 18px; }
.incoming { width: 78%; margin: 0 0 34px; background: white; padding: 13px 14px; border-radius: 14px 14px 14px 3px; font-size: 11px; line-height: 1.6; box-shadow: 0 8px 22px rgba(35,35,25,.06); }
.thinking { display: flex; align-items: center; gap: 4px; color: #8b8e85; margin: 0 0 22px 3px; }
.thinking span { width: 4px; height: 4px; border-radius: 50%; background: var(--accent); animation: pulse 1.4s infinite ease-in-out; }
.thinking span:nth-child(2) { animation-delay: .16s; }.thinking span:nth-child(3) { animation-delay: .32s; }
.thinking small { margin-left: 7px; font-size: 9px; }
.suggestion-label { font-size: 9px; color: #878a82; letter-spacing: .12em; }
.suggestion { width: 100%; text-align: left; border: 1px solid #d5d3cb; background: #fffdf8; padding: 14px; border-radius: 12px; color: #242720; font-size: 11px; line-height: 1.7; cursor: pointer; }
.suggestion span { display: block; color: var(--accent); font-size: 9px; margin-top: 8px; }
.keyboard-preview { height: 226px; background: #cfd2ce; border-radius: 0 0 36px 36px; padding: 12px 8px; }
.context-line { display: flex; justify-content: space-between; align-items: center; background: rgba(255,255,255,.55); border-radius: 9px; padding: 9px 11px; font-size: 9px; }
.context-line b { display: grid; place-items: center; width: 25px; height: 25px; border-radius: 7px; color: white; background: var(--accent); font-size: 9px; }
.keys { display: grid; grid-template-columns: repeat(5, 1fr); gap: 7px; padding-top: 11px; }
.keys i { height: 44px; display: grid; place-items: center; background: #f8f8f7; border-radius: 6px; box-shadow: 0 2px 0 #9da09c; font-size: 12px; font-style: normal; }
.memory-card { position: absolute; z-index: 3; width: 190px; padding: 17px; border: 1px solid rgba(255,255,255,.17); background: rgba(40,47,37,.88); backdrop-filter: blur(12px); color: white; box-shadow: 0 18px 40px rgba(0,0,0,.15); }
.memory-card span { color: var(--acid); font-size: 9px; letter-spacing: .12em; }.memory-card strong { display: block; margin: 8px 0 5px; font-family: var(--serif); font-size: 16px; }.memory-card small { color: #adb4a8; font-size: 9px; }
.card-one { left: 8%; top: 25%; }.card-two { right: 5%; bottom: 21%; }
.visual-note { position: absolute; bottom: 30px; right: 34px; color: rgba(255,255,255,.4); font-family: var(--serif); font-size: 12px; writing-mode: vertical-rl; letter-spacing: .25em; }

.statement, .modes, .principles { padding: 130px 7vw; }
.statement { background: var(--white); }
.section-index { color: #8a8d84; font-size: 10px; letter-spacing: .16em; text-transform: uppercase; }
.statement blockquote { max-width: 1080px; margin: 68px 0; font-size: clamp(38px, 5.7vw, 82px); line-height: 1.35; }
.statement blockquote span { color: var(--accent); border-bottom: 3px solid var(--accent); margin-left: .1em; }
.statement-foot { display: flex; align-items: flex-end; justify-content: space-between; border-top: 1px solid var(--line); padding-top: 28px; }
.statement-foot p { margin: 0; max-width: 520px; color: var(--soft-ink); line-height: 1.85; }
.round-arrow { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%; border: 1px solid var(--line); color: var(--accent); }

.modes { background: var(--warm); }
.section-head { display: flex; justify-content: space-between; align-items: start; margin-bottom: 70px; }
.section-head h2 { margin: 0; font-size: clamp(46px, 6vw, 78px); line-height: 1.2; }
.mode-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.mode-card { min-height: 480px; padding: 26px 30px 36px; border-right: 1px solid var(--line); display: flex; flex-direction: column; }
.mode-card:first-child { border-left: 1px solid var(--line); }
.mode-card.featured { background: var(--ink); color: var(--white); transform: translateY(-18px); border: none; }
.mode-number { color: #8c8e86; font-size: 10px; }
.mode-glyph { height: 190px; display: flex; align-items: center; justify-content: center; }
.glyph-type { gap: 7px; }.glyph-type i { font-style: normal; font-family: var(--serif); font-size: 30px; border-bottom: 2px solid var(--accent); padding: 8px; }
.glyph-polish { gap: 12px; font-size: 11px; }.glyph-polish i { font-style: normal; border: 1px solid #ffffff3b; padding: 12px; }.glyph-polish b { color: var(--acid); }
.glyph-think { gap: 9px; }.glyph-think span { border-radius: 50%; width: 17px; height: 17px; border: 1px solid var(--accent); }.glyph-think span:nth-child(2) { background: var(--accent); }.glyph-think span:nth-child(3) { width: 38px; height: 38px; }
.mode-card h3 { font-family: var(--serif); font-size: 25px; margin: auto 0 16px; }
.mode-card p { margin: 0; color: #74776f; font-size: 13px; line-height: 1.9; }.mode-card.featured p { color: #adb1a8; }

.principles { background: var(--ink); color: var(--white); display: grid; grid-template-columns: .85fr 1.15fr; gap: 9vw; }
.principle-copy h2 { font-size: clamp(52px, 6vw, 86px); line-height: 1.2; margin: 55px 0 36px; }.principle-copy > p:last-child { color: #a8aca3; max-width: 430px; line-height: 1.9; font-size: 14px; }
.principle-list { border-top: 1px solid #ffffff24; }
.principle-list > div { padding: 32px 0; display: grid; grid-template-columns: 54px 1fr; border-bottom: 1px solid #ffffff24; }
.principle-list span { color: var(--accent); font-size: 10px; }.principle-list strong { font-family: var(--serif); font-size: 21px; font-weight: 500; }.principle-list p { grid-column: 2; color: #989d94; margin: 10px 0 0; font-size: 12px; }

.download { min-height: 790px; position: relative; display: grid; place-items: center; overflow: hidden; background: var(--paper); text-align: center; }
.download-halo { position: absolute; width: min(70vw, 850px); aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, rgba(199,221,119,.55) 0 18%, rgba(217,85,54,.15) 38%, transparent 69%); filter: blur(3px); }
.download-content { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; }
.brand-mark.large { width: 54px; height: 54px; font-size: 23px; margin-bottom: 25px; }
.eyebrow.centered { margin-bottom: 25px; }.eyebrow.centered span:last-child { background: var(--accent); }
.download h2 { font-size: clamp(54px, 7vw, 94px); line-height: 1.22; margin: 0 0 44px; }
.coming-soon { display: inline-flex; align-items: center; gap: 12px; border: 1px solid var(--ink); padding: 16px 25px; background: rgba(244,241,234,.65); backdrop-filter: blur(10px); }
.coming-soon i { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 6px rgba(217,85,54,.12); }
.coming-soon strong { font-size: 13px; letter-spacing: .08em; }
.availability { color: #898c84; font-size: 11px; margin-top: 16px; }

footer { min-height: 100px; padding: 0 4.5vw; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; color: #858880; font-size: 11px; }
.footer-brand { color: var(--ink); }.footer-brand .brand-mark { width: 30px; height: 30px; font-size: 14px; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal.visible { opacity: 1; transform: none; }
@keyframes pulse { 0%, 70%, 100% { opacity: .25; transform: translateY(0); } 35% { opacity: 1; transform: translateY(-3px); } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; }.reveal { opacity: 1; transform: none; transition: none; }.thinking span { animation: none; } }

@media (max-width: 900px) {
  .site-header nav { display: none; }
  .hero { grid-template-columns: 1fr; }
  .hero-copy { min-height: 650px; padding-left: 7vw; }
  .hero-visual { min-height: 720px; }
  .mode-grid { grid-template-columns: 1fr; border: 0; gap: 1px; }
  .mode-card, .mode-card:first-child { min-height: 350px; border: 1px solid var(--line); }
  .mode-card.featured { transform: none; }
  .mode-glyph { height: 120px; }
  .principles { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .site-header { height: 68px; padding: 0 20px; }
  .header-cta { font-size: 11px; }
  .hero { min-height: auto; }
  .hero-copy { min-height: 560px; padding: 70px 22px 64px; }
  .hero h1 { font-size: 64px; }
  .hero-intro { font-size: 15px; }
  .hero-visual { min-height: 650px; }
  .phone { width: 278px; min-width: 278px; height: 590px; }
  .chat { height: 310px; }
  .memory-card { width: 150px; padding: 12px; }.card-one { left: -12px; top: 22%; }.card-two { right: -13px; bottom: 14%; }
  .statement, .modes, .principles { padding: 90px 22px; }
  .statement blockquote { margin: 52px 0; font-size: 37px; }
  .statement-foot { align-items: flex-start; gap: 24px; }.round-arrow { flex: 0 0 auto; }
  .section-head { display: block; }.section-head h2 { font-size: 48px; margin-top: 40px; }
  .mode-card { padding: 24px; }
  .principle-copy h2 { font-size: 54px; }
  .download { min-height: 680px; padding: 90px 20px; }.download h2 { font-size: 48px; }
  footer { padding: 28px 20px; flex-wrap: wrap; gap: 22px; } footer > p:nth-child(2) { width: 100%; order: 3; }
}