:root {
  color-scheme: light dark;
  --font-body: 'Be Vietnam Pro', sans-serif;
  --font-display: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-card: 20px;
  --radius-pill: 999px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --bg-top: #F4F2EE;
  --bg-bottom: #ECE9E3;
  --surface: #FBFAF7;
  --surface-2: #EFEDE8;
  --line: #DFDBD3;
  --text: #1B1A18;
  --muted: #6A675F;
  --focus: #23707A;
  --focus-on: #FFFFFF;
  --live: #3AA6AE;
  --water-1: #CFE3E3;
  --water-2: #9CC4C6;
  --sand: #EFE6D6;
  --page: linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-top: #131517;
    --bg-bottom: #0E1012;
    --surface: #1A1D20;
    --surface-2: #22262A;
    --line: #2C3135;
    --text: #ECEBE7;
    --muted: #B5B3AD;
    --focus: #6FBFC4;
    --focus-on: #0B1D1F;
    --live: #6FBFC4;
    --water-1: #1E4E52;
    --water-2: #0F2A2E;
    --sand: #2A251E;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 0;
  color: var(--text);
  background: var(--page);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
::selection { color: var(--focus-on); background: var(--focus); }
a { color: inherit; }
a:focus-visible { outline: 2px solid var(--focus); outline-offset: 4px; border-radius: 3px; }
.skip-link { position: absolute; z-index: 10; top: 8px; left: 8px; padding: 8px 12px; transform: translateY(-160%); color: var(--focus-on); background: var(--focus); border-radius: 8px; }
.skip-link:focus { transform: translateY(0); }
.site-header, .site-footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; width: min(1160px, calc(100% - 64px)); margin-inline: auto; }
.site-header { min-height: 88px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; font-family: var(--font-display); font-size: 18px; font-weight: 500; letter-spacing: -.04em; }
.brand-mark { display: grid; width: 28px; height: 28px; place-items: center; border-radius: 50%; color: var(--focus-on); background: var(--focus); font-family: var(--font-display); font-size: 23px; line-height: 1; transform: rotate(-15deg); }
.site-header nav { display: flex; flex-wrap: wrap; justify-content: center; gap: clamp(16px, 3vw, 38px); }
.site-header nav a { color: var(--muted); text-decoration: none; font-size: 12px; transition: color .2s ease; }
.site-header nav a:hover, .text-link:hover { color: var(--focus); }
.header-note, .eyebrow, .card-number, .concept-kicker, .concept-foot, .supporting-head > span, .timer-top, .timer-overline, .timer-caption, .caption-index, .stack-label, .layer-card-label, .step-state, .footer-year { font-family: var(--font-mono); font-size: 10px; letter-spacing: .1em; }
.header-note { color: var(--muted); text-transform: uppercase; }
.section-wrap { width: min(1060px, calc(100% - 64px)); margin-inline: auto; }
.hero { position: relative; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(280px, .95fr); align-items: center; gap: 56px; min-height: 590px; padding-block: 78px 84px; }
.hero-copy { position: relative; z-index: 1; min-width: 0; }
.eyebrow { display: flex; align-items: center; gap: 9px; margin: 0 0 18px; color: var(--muted); text-transform: uppercase; }
.live-dot { display: inline-block; flex: 0 0 auto; width: 7px; height: 7px; border-radius: 50%; background: var(--live); box-shadow: 0 0 0 4px color-mix(in srgb, var(--live) 17%, transparent); }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1, h2, h3 { margin-top: 0; }
h1 { max-width: 620px; margin-bottom: 22px; font-family: var(--font-display); font-size: clamp(42px, 6vw, 68px); font-weight: 300; line-height: 1.05; letter-spacing: -.065em; }
h1 em { color: var(--focus); font-style: normal; }
.hero-lede { max-width: 500px; margin: 0 0 12px; font-size: 17px; line-height: 1.75; }
.hero-detail { max-width: 470px; margin: 0; color: var(--muted); font-size: 13px; }
.text-link { display: inline-flex; align-items: center; gap: 12px; margin-top: 27px; color: var(--focus); font-size: 12px; font-weight: 500; text-decoration: none; transition: color .2s ease; }
.text-link span { font-size: 18px; }
.hero-art { position: relative; min-width: 0; height: 365px; overflow: hidden; border: 1px solid var(--line); border-radius: 48% 48% var(--radius-card) var(--radius-card); background: radial-gradient(ellipse at 48% 20%, var(--surface) 0, transparent 55%), linear-gradient(180deg, var(--surface), var(--surface-2)); }
.orbit { position: absolute; inset: 13% 13%; border: 1px solid color-mix(in srgb, var(--focus) 20%, transparent); border-radius: 50%; }
.orbit-two { inset: 21% 22%; border-color: color-mix(in srgb, var(--focus) 12%, transparent); }
.tide-label { position: absolute; top: 25%; left: 50%; z-index: 1; color: var(--muted); font-family: var(--font-mono); font-size: 10px; line-height: 1.7; letter-spacing: .16em; text-align: center; transform: translateX(-50%); }
.hero-wave { position: absolute; right: 0; bottom: 35px; left: 0; width: 100%; height: 180px; }
.wave-fill { fill: color-mix(in srgb, var(--water-1) 64%, transparent); }
.wave-line { fill: none; stroke: var(--focus); stroke-width: 1.5; vector-effect: non-scaling-stroke; }
.wave-line-soft { stroke: color-mix(in srgb, var(--focus) 48%, transparent); stroke-width: 1; }
.art-caption { position: absolute; right: 20px; bottom: 15px; color: var(--muted); font-family: var(--font-mono); font-size: 9px; }
.hero-index { position: absolute; right: 0; bottom: 28px; display: flex; align-items: center; gap: 10px; color: var(--muted); font-family: var(--font-mono); font-size: 9px; }
.index-rule { width: 48px; height: 1px; background: var(--line); }
.principles-section, .concepts-section, .glimpse-section { padding-block: 80px 90px; border-top: 1px solid var(--line); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 36px; }
.section-heading .eyebrow, .status-intro .eyebrow { margin-bottom: 10px; }
h2 { margin-bottom: 0; font-family: var(--font-display); font-size: clamp(29px, 4vw, 42px); font-weight: 300; line-height: 1.15; letter-spacing: -.055em; }
.section-intro { max-width: 390px; margin: 0 0 3px; color: var(--muted); font-size: 13px; }
.principle-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; }
.principle-card { position: relative; grid-column: span 2; min-width: 0; min-height: 205px; padding: 22px 20px; border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--surface); }
.principle-card:nth-child(4) { grid-column: 2 / span 2; }
.card-number { color: var(--muted); }
.card-symbol { position: absolute; top: 18px; right: 20px; color: var(--focus); font-family: var(--font-display); font-size: 23px; }
.principle-card h3 { margin: 23px 0 8px; font-family: var(--font-display); font-size: 16px; font-weight: 400; letter-spacing: -.025em; }
.principle-card p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
.concept-layout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(260px, .9fr); gap: 16px; }
.core-concepts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.core-card { position: relative; display: flex; min-width: 0; min-height: 315px; flex-direction: column; padding: 24px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--surface); }
.journey-card { background: linear-gradient(160deg, var(--surface) 15%, color-mix(in srgb, var(--water-1) 33%, var(--surface))); }
.session-card { background: linear-gradient(160deg, var(--surface) 15%, color-mix(in srgb, var(--sand) 50%, var(--surface))); }
.concept-kicker { color: var(--muted); text-transform: uppercase; }
.concept-glyph { margin: 28px 0 4px; color: var(--focus); font-family: var(--font-display); font-size: 35px; line-height: 1; }
.session-card .concept-glyph { color: #8A6236; }
h3 { font-family: var(--font-display); }
.core-card h3 { margin: 8px 0 10px; font-size: 23px; font-weight: 400; letter-spacing: -.04em; }
.core-card p { margin: 0; color: var(--muted); font-size: 12px; }
.concept-foot { display: flex; justify-content: space-between; margin-top: auto; padding-top: 28px; color: var(--muted); font-size: 9px; }
.supporting-concepts { min-width: 0; padding: 23px 24px; border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--surface); }
.supporting-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; padding-bottom: 13px; border-bottom: 1px solid var(--line); }
.supporting-head h3 { margin: 0; font-size: 16px; font-weight: 400; }
.supporting-head > span { color: var(--muted); font-size: 8px; }
.module-list { margin: 4px 0 0; }
.module-list div { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 12px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.module-list dt { color: var(--focus); font-size: 12px; font-weight: 500; }
.module-list dd { min-width: 0; margin: 0; color: var(--muted); font-size: 11px; }
.module-note { display: flex; gap: 9px; margin: 17px 0 0; color: var(--muted); font-size: 10px; }
.module-note span { color: var(--focus); }
.glimpse-section { padding-bottom: 100px; }
.timer-figure { margin: 0; }
.timer-mock { position: relative; min-height: 354px; padding: 24px 28px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-card); background: linear-gradient(150deg, var(--surface), var(--surface-2)); }
.timer-top { position: relative; z-index: 1; display: flex; justify-content: space-between; gap: 14px; color: var(--muted); font-size: 9px; }
.timer-top > span:first-child { display: inline-flex; align-items: center; gap: 9px; color: var(--focus); }
.timer-top .live-dot { width: 6px; height: 6px; box-shadow: none; }
.timer-content { position: relative; z-index: 1; width: min(500px, 100%); margin: 26px auto 0; text-align: center; }
.timer-overline, .timer-caption { color: var(--muted); font-size: 9px; }
.timer-journey { position: relative; display: inline-block; margin: 7px 0 8px; font-family: var(--font-display); font-size: clamp(20px, 3vw, 27px); font-weight: 300; line-height: 1.25; letter-spacing: -.04em; }
.journey-spark { position: absolute; top: 1px; right: -28px; color: var(--focus); font-size: 15px; }
.timer-display { color: var(--text); font-family: var(--font-display); font-size: clamp(44px, 9vw, 72px); font-weight: 300; font-variant-numeric: tabular-nums; line-height: 1.2; letter-spacing: -.055em; }
.timer-display span { color: var(--muted); font-size: .58em; }
.timer-tide { position: absolute; right: 0; bottom: 72px; left: 0; height: 60px; overflow: hidden; opacity: .65; }
.timer-tide span { position: absolute; top: 22px; left: -4%; width: 110%; height: 80px; border-top: 1px solid var(--focus); border-radius: 50% 50% 0 0; background: color-mix(in srgb, var(--water-1) 44%, transparent); transform: rotate(-2deg); }
.timer-tide span + span { top: 32px; left: -2%; opacity: .65; transform: rotate(2deg); }
.timer-controls { position: absolute; right: 24px; bottom: 20px; left: 24px; display: flex; justify-content: center; gap: 10px; }
.control-chip { display: inline-flex; align-items: center; gap: 7px; padding: 7px 13px; border: 1px solid var(--line); border-radius: var(--radius-pill); color: var(--text); background: var(--surface); font-size: 10px; }
.control-chip b { color: var(--focus); font-size: 10px; }
.end-chip b { color: var(--muted); }
.timer-figure figcaption { display: flex; align-items: baseline; gap: 12px; margin-top: 13px; color: var(--muted); font-size: 10px; }
.caption-index { flex: 0 0 auto; color: var(--focus); font-size: 9px; }
.under-hood-section { padding-block: 78px 88px; border-block: 1px solid var(--line); background: color-mix(in srgb, var(--surface-2) 62%, transparent); }
.architecture-layout { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(240px, .75fr); gap: 18px; align-items: stretch; }
.stack-list { min-width: 0; padding: 4px 22px; border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--surface); }
.stack-row { display: grid; grid-template-columns: 105px minmax(0, 1fr); gap: 12px; align-items: center; padding: 14px 0; border-bottom: 1px solid var(--line); }
.stack-row:last-child { border: 0; }
.stack-label { color: var(--muted); font-size: 9px; }
.stack-row p { display: flex; flex-wrap: wrap; gap: 3px 12px; min-width: 0; margin: 0; font-size: 11px; }
.stack-row strong { font-weight: 500; }
.stack-row p span { color: var(--muted); }
.layer-card { display: flex; min-width: 0; flex-direction: column; align-items: stretch; padding: 21px; border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--surface); }
.layer-card-label { margin-bottom: 14px; color: var(--muted); font-size: 9px; }
.layer-box { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 9px; font-size: 11px; font-weight: 500; }
.layer-box small { color: var(--muted); font-size: 8px; font-weight: 400; text-align: right; }
.api-layer { border-color: color-mix(in srgb, var(--focus) 32%, var(--line)); background: color-mix(in srgb, var(--water-1) 23%, var(--surface)); }
.app-layer { background: var(--surface-2); }
.domain-layer { border-color: color-mix(in srgb, var(--focus) 32%, var(--line)); }
.infra-layer { background: color-mix(in srgb, var(--sand) 45%, var(--surface)); }
.layer-arrow { align-self: center; height: 17px; color: var(--muted); font-family: var(--font-mono); font-size: 11px; line-height: 17px; }
.infra-link { display: flex; align-items: center; gap: 7px; margin: 9px 0; color: var(--muted); font-size: 9px; }
.infra-link span { color: var(--focus); }
.layer-note { margin: auto 0 0; padding-top: 14px; color: var(--muted); font-size: 9px; }
.status-section { display: grid; grid-template-columns: minmax(220px, .8fr) minmax(0, 1.2fr); gap: 52px; padding-block: 88px 84px; }
.status-intro h2 { max-width: 350px; font-size: clamp(29px, 3.6vw, 39px); }
.status-intro > p:last-child { max-width: 320px; margin: 16px 0 0; color: var(--muted); font-size: 12px; }
.roadmap { position: relative; min-width: 0; padding-left: 7px; }
.roadmap::before { position: absolute; top: 19px; bottom: 28px; left: 23px; width: 1px; background: var(--line); content: ''; }
.roadmap-step { position: relative; display: flex; gap: 17px; padding-bottom: 21px; }
.roadmap-step:last-child { padding-bottom: 0; }
.step-marker { position: relative; z-index: 1; display: grid; flex: 0 0 34px; width: 34px; height: 34px; place-items: center; border: 1px solid var(--line); border-radius: 50%; color: var(--muted); background: var(--bg-top); font-family: var(--font-mono); font-size: 9px; }
.is-done .step-marker { border-color: var(--focus); color: var(--focus-on); background: var(--focus); }
.is-next .step-marker { border-color: var(--focus); color: var(--focus); }
.step-state { display: block; margin: 0 0 2px; color: var(--muted); font-size: 8px; }
.roadmap-step h3 { margin: 0; font-size: 14px; font-weight: 500; }
.roadmap-step p { margin: 3px 0 0; color: var(--muted); font-size: 10px; }
.project-note { grid-column: 1 / -1; display: flex; align-items: center; gap: 11px; width: fit-content; max-width: 100%; margin: 0; padding: 12px 17px; border: 1px solid var(--line); border-radius: var(--radius-pill); color: var(--muted); background: var(--surface); font-size: 10px; }
.project-note span { color: var(--focus); }
.site-footer { min-height: 86px; border-top: 1px solid var(--line); }
.site-footer p { margin: 0; color: var(--muted); font-size: 10px; }
.footer-year { color: var(--muted); font-size: 8px; }

@media (max-width: 760px) {
  .site-header, .site-footer, .section-wrap { width: min(100% - 40px, 600px); }
  .site-header { min-height: 72px; }
  .site-header nav { gap: 14px; }
  .site-header nav a { font-size: 10px; }
  .header-note { display: none; }
  .hero { grid-template-columns: minmax(0, 1fr) minmax(220px, .8fr); gap: 26px; min-height: 490px; padding-block: 62px 72px; }
  .hero-art { height: 310px; }
  .principles-section, .concepts-section, .glimpse-section { padding-block: 62px; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 14px; margin-bottom: 27px; }
  .section-intro { max-width: 540px; }
  .principle-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .principle-card, .principle-card:nth-child(4) { grid-column: auto; }
  .principle-card:last-child { grid-column: 1 / -1; }
  .concept-layout { grid-template-columns: minmax(0, 1fr); }
  .core-card { min-height: 280px; }
  .architecture-layout { grid-template-columns: minmax(0, 1fr); }
  .layer-card { min-height: 350px; }
  .status-section { grid-template-columns: minmax(0, 1fr); gap: 30px; padding-block: 66px; }
  .project-note { grid-column: 1; }
  .under-hood-section { padding-block: 62px; }
}
@media (max-width: 520px) {
  .site-header, .site-footer, .section-wrap { width: calc(100% - 36px); }
  .site-header { align-items: center; gap: 10px; }
  .brand { flex: 0 0 auto; font-size: 16px; }
  .brand-mark { width: 25px; height: 25px; font-size: 21px; }
  .site-header nav { justify-content: flex-end; gap: 10px; }
  .site-header nav a { font-size: 9px; }
  .hero { grid-template-columns: minmax(0, 1fr); gap: 28px; min-height: 0; padding-block: 55px 57px; }
  h1 { font-size: clamp(42px, 12vw, 58px); }
  .hero-lede { font-size: 15px; }
  .hero-art { width: min(100%, 380px); height: 245px; justify-self: center; }
  .hero-wave { bottom: 25px; height: 130px; }
  .hero-index { display: none; }
  .principles-section, .concepts-section, .glimpse-section { padding-block: 53px; }
  h2 { font-size: clamp(28px, 8vw, 36px); }
  .principle-grid { gap: 9px; }
  .principle-card { min-height: 208px; padding: 16px 14px; }
  .principle-card h3 { margin-top: 20px; font-size: 14px; }
  .principle-card p { font-size: 11px; }
  .card-symbol { top: 14px; right: 14px; font-size: 19px; }
  .core-concepts { grid-template-columns: minmax(0, 1fr); }
  .core-card { min-height: 245px; }
  .supporting-concepts { padding: 19px 16px; }
  .module-list div { grid-template-columns: 82px minmax(0, 1fr); gap: 8px; }
  .timer-mock { min-height: 320px; padding: 19px 14px; }
  .timer-top { font-size: 7px; letter-spacing: .06em; }
  .timer-controls { right: 10px; left: 10px; }
  .control-chip { padding: 7px 10px; font-size: 9px; }
  .timer-figure figcaption { align-items: flex-start; font-size: 9px; }
  .stack-list { padding-inline: 14px; }
  .stack-row { grid-template-columns: 78px minmax(0, 1fr); gap: 8px; }
  .stack-label { font-size: 8px; letter-spacing: .04em; }
  .stack-row p { font-size: 10px; }
  .site-footer { flex-wrap: wrap; justify-content: flex-start; gap: 10px 18px; padding-block: 18px; }
  .site-footer p { flex: 1 1 180px; }
  .footer-year { width: 100%; }
}
@media (max-width: 380px) {
  .site-header nav { gap: 7px; }
  .site-header nav a { font-size: 8px; }
  .eyebrow { font-size: 8px; letter-spacing: .06em; }
  .hero { padding-top: 42px; }
  .principle-card { padding-inline: 11px; }
  .timer-display { font-size: 42px; }
  .stack-row { grid-template-columns: 68px minmax(0, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}