/* Zenton Platform — application layer styles (self-contained, no build step) */

:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --border: #e2e5ea;
  --text: #1a1d23;
  --text-muted: #5b6572;
  --text-faint: #8a94a2;
  --accent: #3f7d3a;
  --accent-ink: #ffffff;
  --accent-soft: #e7f2e2;
  --ok-bg: #e6f6ec; --ok-fg: #1c7c3f;
  --warn-bg: #fdf0e3; --warn-fg: #9a5b1a;
  --plan-bg: #eef0f3; --plan-fg: #5b6572;
  --err-bg: #fdecec; --err-fg: #b3261e;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16,24,40,.06), 0 1px 3px rgba(16,24,40,.10);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1115;
    --surface: #171a21;
    --surface-2: #1e222b;
    --border: #2a2f3a;
    --text: #e7e9ee;
    --text-muted: #9aa4b2;
    --text-faint: #6b7482;
    --accent: #6fae5e;
    --accent-ink: #0e1710;
    --accent-soft: #17261a;
    --ok-bg: #13301f; --ok-fg: #6cd08f;
    --warn-bg: #33260f; --warn-fg: #e0a35f;
    --plan-bg: #23262e; --plan-fg: #9aa4b2;
    --err-bg: #351c1a; --err-fg: #f0928a;
    --shadow: 0 1px 2px rgba(0,0,0,.3);
  }
}

/* Explicit theme override (set via the theme toggle, persisted in localStorage) */
:root[data-theme="dark"] {
  --bg: #0f1115;
  --surface: #171a21;
  --surface-2: #1e222b;
  --border: #2a2f3a;
  --text: #e7e9ee;
  --text-muted: #9aa4b2;
  --text-faint: #6b7482;
  --accent: #6fae5e;
  --accent-ink: #0e1710;
  --accent-soft: #17261a;
  --ok-bg: #13301f; --ok-fg: #6cd08f;
  --warn-bg: #33260f; --warn-fg: #e0a35f;
  --plan-bg: #23262e; --plan-fg: #9aa4b2;
  --err-bg: #351c1a; --err-fg: #f0928a;
  --shadow: 0 1px 2px rgba(0,0,0,.3);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .4em; font-weight: 650; }
p { margin: 0 0 1em; }
code { font-family: var(--mono); font-size: .88em; background: var(--surface-2); padding: .1em .35em; border-radius: 4px; }
hr { border: 0; border-top: 1px solid var(--border); margin: 28px 0; }

.container { max-width: 1040px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 520px; margin: 0 auto; padding: 0 24px; }

/* --- Top bar --- */
.topbar {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.topbar__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.brand { display: flex; align-items: baseline; gap: 9px; font-weight: 700; color: var(--text); font-size: 16px; }
.brand:hover { text-decoration: none; }
.brand__dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); display: inline-block; align-self: center; }
.brand__sub { color: var(--text-faint); font-weight: 500; font-size: 13px; }
.topnav { display: flex; gap: 20px; align-items: center; }
.topnav a { color: var(--text-muted); font-size: 14px; }
.topnav a:hover { color: var(--text); text-decoration: none; }
@media (max-width: 760px) {
  .topnav { gap: 12px; }
  .topnav a[href^="#"] { display: none; }
}

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 9px 16px; border-radius: 8px; font-size: 14px; font-weight: 550;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  cursor: pointer; transition: background .12s, border-color .12s;
}
.btn:hover { text-decoration: none; background: var(--surface-2); }
.btn--primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { background: #336530; }
.btn--ghost { background: transparent; }
.btn--sm { padding: 6px 12px; font-size: 13px; }

.section { padding: 56px 0; }
.section--tint { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section__label { text-transform: uppercase; letter-spacing: .08em; font-size: 12px; font-weight: 650; color: var(--text-faint); margin-bottom: 16px; }

.grid { display: grid; gap: 16px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) { .grid--3, .grid--2 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow);
}
.card h3 { font-size: 16px; margin-bottom: 2px; }
.card .card__tagline { color: var(--text-faint); font-size: 13px; margin-bottom: 10px; }
.card p { color: var(--text-muted); font-size: 14px; margin: 0; }

/* --- Stage badges --- */
.badge {
  display: inline-block; font-size: 11px; font-weight: 650; letter-spacing: .03em;
  padding: 3px 8px; border-radius: 999px; text-transform: uppercase;
}
.badge--available { background: var(--ok-bg); color: var(--ok-fg); }
.badge--next { background: var(--warn-bg); color: var(--warn-fg); }
.badge--planned { background: var(--plan-bg); color: var(--plan-fg); }
.badge--neutral { background: var(--accent-soft); color: var(--accent); }

/* --- FAQ --- */
.faq { display: grid; gap: 10px; max-width: 720px; }
.faq__item { border: 1px solid var(--border); border-radius: 9px; background: var(--surface); padding: 14px 16px; }
.faq__item summary { cursor: pointer; font-weight: 600; font-size: 14.5px; list-style: none; }
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after { content: "+"; float: right; color: var(--text-faint); font-weight: 400; }
.faq__item[open] summary::after { content: "\2013"; }
.faq__item p { margin: 10px 0 0; color: var(--text-muted); font-size: 13.5px; }

/* --- Capability list --- */
.caps { display: grid; gap: 10px; }
.cap {
  display: flex; justify-content: space-between; align-items: flex-start; gap: 16px;
  padding: 14px 16px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface);
}
.cap__title { font-weight: 600; font-size: 14px; }
.cap__summary { color: var(--text-muted); font-size: 13px; margin-top: 2px; }
.cap__meta { flex-shrink: 0; }

/* --- Footer --- */
.footer { border-top: 1px solid var(--border); margin-top: 56px; padding: 24px 0 48px; color: var(--text-faint); font-size: 13px; }
.footer a { color: var(--text-muted); }

/* --- Auth --- */
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 40px 20px; }
.auth-card { width: 100%; max-width: 380px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); }
.auth-card h1 { font-size: 20px; text-align: center; }
.auth-card .muted { text-align: center; color: var(--text-muted); font-size: 13px; margin-bottom: 22px; }

/* --- Forms --- */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.field input, .field select {
  width: 100%; padding: 9px 11px; font-size: 14px; font-family: inherit;
  border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text);
}
.field input:focus, .field select:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.field .hint { font-size: 12px; color: var(--text-faint); margin-top: 5px; }
.field .error { font-size: 12px; color: var(--err-fg); margin-top: 5px; }

/* --- Flash --- */
.flash { padding: 10px 14px; border-radius: 8px; font-size: 13.5px; margin-bottom: 14px; }
.flash--success { background: var(--ok-bg); color: var(--ok-fg); }
.flash--error { background: var(--err-bg); color: var(--err-fg); }
.flash--warning { background: var(--warn-bg); color: var(--warn-fg); }
.flash--info { background: var(--accent-soft); color: var(--accent); }

/* --- App shell --- */
.app { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.sidebar { border-right: 1px solid var(--border); background: var(--surface); padding: 20px 14px; }
.sidebar .brand { margin: 6px 8px 22px; }
.sidebar nav { display: grid; gap: 2px; }
.sidebar nav a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 10px; border-radius: 7px; font-size: 14px; color: var(--text-muted);
}
.sidebar nav a:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.sidebar nav a.is-active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.sidebar nav a.is-disabled { color: var(--text-faint); cursor: default; pointer-events: none; }
.sidebar__foot { margin-top: 20px; padding: 10px 10px 0; border-top: 1px solid var(--border); font-size: 12px; color: var(--text-faint); }
.main { padding: 28px 32px 60px; max-width: 900px; }
.page-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; gap: 16px; }
.page-head h1 { font-size: 22px; margin: 0; }
@media (max-width: 760px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--border); }
}

/* --- Stat tiles --- */
.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 28px; }
@media (max-width: 760px) { .tiles { grid-template-columns: 1fr; } }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
.tile .tile__n { font-size: 26px; font-weight: 700; letter-spacing: -.01em; }
.tile .tile__l { font-size: 12.5px; color: var(--text-faint); text-transform: uppercase; letter-spacing: .05em; }

/* --- Table / list --- */
.plist { display: grid; gap: 10px; }
.prow {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px 16px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface);
}
.prow:hover { border-color: var(--accent); }
.prow__name { font-weight: 600; font-size: 14.5px; }
.prow__meta { color: var(--text-faint); font-size: 12.5px; margin-top: 2px; }

.dl { display: grid; grid-template-columns: 160px 1fr; gap: 10px 16px; font-size: 14px; }
.dl dt { color: var(--text-faint); }
.dl dd { margin: 0; }

.empty { text-align: center; padding: 48px 20px; color: var(--text-muted); border: 1px dashed var(--border); border-radius: var(--radius); }

.stack > * + * { margin-top: 12px; }
.mt-32 { margin-top: 32px; }
.muted { color: var(--text-muted); }

/* --- Language switcher --- */
.langswitch { font-size: 13px; color: var(--text-faint); }
.langswitch a { color: var(--text-muted); }
.langswitch strong { color: var(--text); font-weight: 600; }
.langswitch a + a::before, .langswitch strong + a::before, .langswitch a + strong::before { content: "·"; margin: 0 6px; color: var(--border); }

/* --- Theme toggle --- */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; padding: 0; flex-shrink: 0;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface); color: var(--text-muted); cursor: pointer;
  transition: background .12s, color .12s, border-color .12s;
}
.theme-toggle:hover { background: var(--surface-2); color: var(--text); }
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle__icon--sun { display: none; }
:root[data-theme="dark"] .theme-toggle__icon--sun { display: block; }
:root[data-theme="dark"] .theme-toggle__icon--moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle__icon--sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle__icon--moon { display: none; }
}
.auth-langswitch { text-align: center; margin-top: 18px; font-size: 13px; }
.auth-langswitch a { color: var(--text-muted); }

/* --- Google button --- */
.btn--google {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  width: 100%; padding: 10px 16px; margin-bottom: 4px;
  border: 1px solid var(--border); border-radius: 8px; background: var(--surface);
  color: var(--text); font-size: 14px; font-weight: 550;
}
.btn--google:hover { text-decoration: none; background: var(--surface-2); }
.btn--google__g {
  display: inline-flex; align-items: center; justify-content: center;
  width: 18px; height: 18px; border-radius: 50%;
  background: #fff; color: #4285f4; font-weight: 700; font-size: 13px;
  border: 1px solid #dadce0; font-family: Arial, sans-serif;
}
.btn--sm.btn--google { width: auto; display: inline-flex; padding: 6px 12px; margin: 0; }

.auth-divider { display: flex; align-items: center; gap: 12px; margin: 16px 0; color: var(--text-faint); font-size: 12px; }
.auth-divider::before, .auth-divider::after { content: ""; flex: 1; height: 1px; background: var(--border); }


/* ============================================================================
   PUBLIC LANDING  ·  everything below is scoped to .lp (body.lp)
   Visual language: engineered / systems / blueprint. System type for labels,
   hairlines as structure, minimal radius, accent used only as signal.
   ========================================================================= */

.lp {
  --l-content: 1100px;
  --l-pad: clamp(76px, 10vw, 132px);
  --l-r: 4px;
  --l-grid: rgba(127, 131, 145, .11);
  --l-display: clamp(2.35rem, 1.2rem + 4.1vw, 4.4rem);
  --l-h2: clamp(1.7rem, 1.15rem + 2.1vw, 2.55rem);
  --l-h3: clamp(1.14rem, 1.02rem + .5vw, 1.35rem);
  --l-lead: clamp(1.04rem, 1rem + .3vw, 1.19rem);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
.lp main { display: block; overflow-x: clip; }
.lp p { margin: 0; }
.lp a { text-decoration: none; }
.lp a:hover { text-decoration: none; }

.l-wrap { max-width: var(--l-content); margin: 0 auto; padding: 0 clamp(20px, 5vw, 44px); }
.lp .container { max-width: var(--l-content); padding: 0 clamp(20px, 5vw, 44px); }

.lp .l-section { padding-block: var(--l-pad); border-top: 1px solid var(--border); position: relative; }
.lp .l-band { background: var(--surface); }
.l-section > .l-wrap + .l-wrap { margin-top: clamp(48px, 7vw, 90px); }

/* --- shared type --- */
.lp .l-eyebrow {
  display: flex; align-items: center; gap: 12px;
  font: 600 .72rem/1 var(--mono); letter-spacing: .16em; text-transform: uppercase;
  color: var(--text-faint); margin: 0 0 22px;
}
.lp .l-eyebrow i {
  font-style: normal; color: var(--accent); position: relative; padding-right: 13px;
}
.lp .l-eyebrow i::after {
  content: ""; position: absolute; right: 0; top: 50%; width: 1px; height: 11px;
  background: var(--border); transform: translateY(-50%);
}
.lp h2 {
  font-size: var(--l-h2); line-height: 1.12; letter-spacing: -.022em;
  font-weight: 600; max-width: 22ch; margin: 0 0 20px;
}
.lp .l-lead { font-size: var(--l-lead); line-height: 1.6; color: var(--text-muted); max-width: 60ch; }
.lp .l-note {
  font: 500 .8rem/1.55 var(--mono); color: var(--text-faint); max-width: 58ch; margin: 20px 0 0;
}
.lp .l-note + .l-note { margin-top: 8px; }
.lp .l-subhead { font-size: var(--l-h3); font-weight: 620; letter-spacing: -.012em; margin: 0 0 10px; }
.lp .l-restate {
  font-size: clamp(1.3rem, .95rem + 1.5vw, 1.95rem); font-weight: 560;
  letter-spacing: -.016em; line-height: 1.3; color: var(--text); max-width: 26ch;
  margin: clamp(38px, 5vw, 60px) 0 0;
}

/* --- blueprint backdrop (restrained: hero, compound, final only) --- */
.l-hero, .l-compound { position: relative; }
.l-hero::before, .l-compound::before, .l-final::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--l-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--l-grid) 1px, transparent 1px);
  background-size: 34px 34px;
  -webkit-mask-image: radial-gradient(125% 85% at 50% 0%, #000 0%, transparent 72%);
          mask-image: radial-gradient(125% 85% at 50% 0%, #000 0%, transparent 72%);
}
.l-hero > *, .l-compound > * { position: relative; z-index: 1; }

/* --- topbar --- */
.lp .topbar {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, background .2s ease;
}
@supports (backdrop-filter: blur(8px)) {
  .lp .topbar { background: color-mix(in srgb, var(--bg) 72%, transparent); backdrop-filter: blur(12px) saturate(1.4); }
  .lp .topbar.is-scrolled { background: color-mix(in srgb, var(--bg) 90%, transparent); }
}
.lp .topbar.is-scrolled { border-bottom-color: var(--border); }
.lp .topbar__inner { height: 64px; }
.lp .brand { gap: 10px; align-items: center; }
.lp .brand__mark { display: inline-flex; color: var(--accent); }
.lp .brand__mark svg { display: block; }
.lp .brand__name { font-weight: 680; letter-spacing: -.01em; font-size: 16px; color: var(--text); }
.lp .topnav { gap: 22px; }
.lp .topnav a[href^="#"] {
  font: 600 .74rem/1 var(--mono); letter-spacing: .05em; text-transform: uppercase;
  color: var(--text-faint); padding: 21px 0; position: relative;
}
.lp .topnav a[href^="#"]:hover { color: var(--text); }
.lp .topnav a.is-current { color: var(--text); }
.lp .topnav a.is-current::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: var(--accent);
}
.lp .langswitch { font: 500 .74rem/1 var(--mono); text-transform: uppercase; letter-spacing: .05em; }

/* --- buttons / links --- */
.lp .l-btn {
  border-radius: var(--l-r); padding: 12px 22px; font-size: 14px; font-weight: 620;
  transition: transform .14s ease, background .14s ease, box-shadow .14s ease;
}
.lp .l-btn.btn--primary:hover {
  background: var(--accent); transform: translateY(-1px);
  box-shadow: 0 10px 26px -12px color-mix(in srgb, var(--accent) 65%, transparent);
}
.lp .l-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 620; font-size: 14px; color: var(--text);
}
.lp .l-link span { color: var(--accent); transition: transform .16s ease; }
.lp .l-link:hover span { transform: translateX(4px); }
.lp .l-cta-row { display: flex; align-items: center; gap: 16px 26px; flex-wrap: wrap; margin-top: clamp(28px, 4vw, 40px); }

.lp a:focus-visible,
.lp summary:focus-visible,
.lp .btn:focus-visible,
.lp .l-ledger__row:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px;
}
.lp .faq__item summary:focus { outline: none; }
.lp .faq__item summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* --- hero --- */
.l-hero { padding-block: clamp(96px, 15vh, 172px) clamp(52px, 8vw, 92px); overflow: hidden; border-top: 0; }
.l-hero__inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 400px); gap: clamp(32px, 6vw, 76px); align-items: center; }
.l-hero h1 {
  font-size: var(--l-display); line-height: 1.03; letter-spacing: -.038em;
  font-weight: 640; margin: 18px 0 22px; max-width: 16ch; text-wrap: balance;
}
.l-hero .l-lead { max-width: 46ch; font-size: clamp(1.06rem, 1rem + .45vw, 1.26rem); }
.l-hero__art { color: var(--text); }
.l-hero__art svg { width: 100%; height: auto; display: block; overflow: visible; }
.l-status {
  display: flex; flex-wrap: wrap; gap: 14px 26px;
  font: 600 .72rem/1 var(--mono); letter-spacing: .1em; text-transform: uppercase;
  color: var(--text-faint); border-top: 1px solid var(--border);
  padding-top: 18px; margin: clamp(40px, 6vw, 60px) 0 0;
}
.l-status i { font-style: normal; display: inline-flex; align-items: baseline; gap: 5px; }
.l-status i::before { content: "\25AA"; color: var(--accent); align-self: center; }
.l-status b { color: var(--text); font-weight: 650; }

/* --- 01 architecture --- */
.lp .ztree { text-align: center; margin-top: clamp(38px, 5vw, 58px); }
.lp .ztree__root {
  display: inline-block; font: 650 .8rem/1 var(--mono); letter-spacing: .18em; text-transform: uppercase;
  padding: 13px 26px; border: 0; border-radius: var(--l-r);
  background: var(--text); color: var(--bg); box-shadow: none;
}
.lp .ztree__root::after { content: ""; display: block; width: 1px; height: 34px; background: var(--border); margin: 0 auto; }
.lp .ztree__branches {
  display: flex; gap: clamp(16px, 5vw, 60px); justify-content: center;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 34px 0;
}
.lp .ztree__node {
  position: relative; flex: 0 1 240px; max-width: 240px; padding: 22px 24px;
  border: 1px solid var(--border); border-radius: var(--l-r); background: var(--bg);
  transition: border-color .16s ease, transform .16s ease;
}
.lp .ztree__node::before { content: ""; position: absolute; top: -35px; left: 50%; width: 1px; height: 34px; background: var(--border); }
.lp .ztree__node:hover { border-color: var(--accent); transform: translateY(-3px); }
.lp .ztree__name { font-size: 1.06rem; font-weight: 640; }
.lp .ztree__tag { font: 600 .68rem/1 var(--mono); text-transform: uppercase; letter-spacing: .12em; color: var(--text-faint); margin-top: 9px; }
.lp .l-arch__base {
  position: relative; margin: 34px auto 0; max-width: 520px; padding: 13px;
  border: 1px dashed var(--border); border-radius: var(--l-r);
  font: 600 .7rem/1 var(--mono); text-transform: uppercase; letter-spacing: .14em; color: var(--text-faint);
}
.lp .l-arch__base::before { content: ""; position: absolute; top: -35px; left: 50%; width: 1px; height: 34px; background: var(--border); }

/* --- 01 product split --- */
.lp .split {
  display: grid; grid-template-columns: 1fr; gap: 0; background: transparent;
  border: 1px solid var(--border); border-radius: var(--l-r); overflow: hidden;
  counter-reset: lp-prod; margin-top: clamp(28px, 4vw, 44px);
}
.lp .split__col { background: var(--bg); padding: clamp(28px, 4vw, 46px); position: relative; }
.lp .split__col + .split__col { border-left: 1px solid var(--border); }
.lp .split__col::before {
  counter-increment: lp-prod; content: "0" counter(lp-prod);
  position: absolute; top: clamp(28px, 4vw, 46px); right: clamp(28px, 4vw, 46px);
  font: 600 .8rem/1 var(--mono); color: var(--text-faint); letter-spacing: .04em;
}
.lp .split__eyebrow { font: 600 .68rem/1 var(--mono); text-transform: uppercase; letter-spacing: .12em; color: var(--accent); margin-bottom: 14px; }
.lp .split__col h3 { font-size: clamp(1.3rem, 1.05rem + 1vw, 1.7rem); font-weight: 620; letter-spacing: -.018em; margin: 0 0 12px; }
.lp .split__col p { color: var(--text-muted); font-size: .97rem; line-height: 1.6; margin: 0 0 14px; }
.lp .split__for { font: 500 .82rem/1.5 var(--mono); color: var(--text-faint); margin: 0 0 22px; }

/* --- 02 foundation --- */
.l-foundation { display: grid; grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr); gap: clamp(32px, 6vw, 76px); align-items: start; }
.l-foundation__intro { position: sticky; top: 92px; }
.l-stack { border: 1px solid var(--border); border-radius: var(--l-r); background: var(--bg); overflow: hidden; }
.l-stack__cap {
  font: 650 .68rem/1 var(--mono); text-transform: uppercase; letter-spacing: .16em; color: var(--text-faint);
  padding: 14px 20px; border-bottom: 1px solid var(--border); background: var(--surface);
}
.l-stack ol { list-style: none; margin: 0; padding: 0; }
.l-stack li {
  display: grid; grid-template-columns: 40px 1fr; align-items: baseline; gap: 14px;
  padding: 15px 20px; font-size: .95rem; line-height: 1.5; color: var(--text);
  transition: background .14s ease;
}
.l-stack li + li { border-top: 1px solid var(--border); }
.l-stack li:hover { background: var(--surface); }
.l-stack__n { font: 600 .72rem/1 var(--mono); color: var(--text-faint); letter-spacing: .04em; }
.l-stack li:hover .l-stack__n { color: var(--accent); }
.l-stack__out {
  display: flex; align-items: center; gap: 10px; padding: 16px 20px;
  border-top: 1px solid var(--accent); background: var(--accent-soft); color: var(--accent);
  font-weight: 640; font-size: .95rem; letter-spacing: -.01em;
}
.l-stack__out span { font-size: 1.15em; }

/* --- 03 merge + timeline --- */
.l-merge { display: flex; align-items: stretch; gap: 12px; flex-wrap: wrap; margin-top: clamp(28px, 4vw, 44px); }
.l-merge__in, .l-merge__out {
  flex: 1 1 180px; display: flex; align-items: center; justify-content: center; text-align: center;
  padding: 26px 22px; border: 1px solid var(--border); border-radius: var(--l-r);
  font-weight: 600; font-size: 1rem; background: var(--bg);
}
.l-merge__out { flex: 1 1 210px; border-color: var(--accent); background: var(--accent-soft); color: var(--accent); font-weight: 680; }
.l-merge__op { display: flex; align-items: center; justify-content: center; font: 400 1.3rem/1 var(--mono); color: var(--text-faint); padding: 0 4px; }

.l-timeline { list-style: none; margin: clamp(24px, 3vw, 36px) 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; position: relative; }
.l-timeline::before { content: ""; position: absolute; left: 0; right: 0; top: 13px; height: 1px; background: var(--border); }
.l-timeline li { position: relative; padding: 0 18px 0 0; }
.l-timeline__n {
  position: relative; z-index: 1; display: inline-flex; align-items: center; justify-content: center;
  min-width: 28px; height: 28px; padding: 0 6px; border: 1px solid var(--border); background: var(--bg);
  border-radius: var(--l-r); font: 600 .7rem/1 var(--mono); color: var(--accent); letter-spacing: .04em;
}
.l-timeline__t { display: block; margin-top: 12px; font-size: .9rem; line-height: 1.45; color: var(--text); max-width: 22ch; }
.l-install-cta { display: flex; align-items: center; gap: 14px 20px; flex-wrap: wrap; margin-top: clamp(28px, 4vw, 40px); }
.l-mono-note { font: 500 .76rem/1.5 var(--mono); color: var(--text-faint); }

/* --- 04 evidence --- */
.l-figures { display: flex; flex-wrap: wrap; gap: clamp(28px, 7vw, 80px); margin-top: clamp(32px, 5vw, 54px); }
.l-figure { display: flex; flex-direction: column; gap: 12px; max-width: 280px; }
.l-figure__n {
  font-size: clamp(3.4rem, 1.8rem + 7.5vw, 6.6rem); font-weight: 640; letter-spacing: -.05em;
  line-height: .85; color: var(--text); font-variant-numeric: tabular-nums;
}
.l-figure__l { font: 500 .82rem/1.55 var(--mono); color: var(--text-muted); }
.l-ledger { border-top: 1px solid var(--border); }
.l-ledger__src { font: 650 .68rem/1 var(--mono); text-transform: uppercase; letter-spacing: .16em; color: var(--text-faint); padding: 18px 0 4px; }
.l-ledger__src span { color: var(--accent); }
.l-ledger__row {
  display: grid; grid-template-columns: 128px 1fr auto auto; align-items: baseline; gap: 8px 22px;
  padding: 20px 0; border-top: 1px solid var(--border); color: var(--text);
  transition: background .14s ease, padding .14s ease;
}
.l-ledger__row:hover { background: var(--surface); padding-left: 14px; padding-right: 14px; }
.l-ledger__name { font-weight: 640; font-size: 1rem; letter-spacing: -.01em; }
.l-ledger__row:hover .l-ledger__name { color: var(--accent); }
.l-ledger__desc { color: var(--text-muted); font-size: .92rem; }
.l-ledger__meta { font: 500 .72rem/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--text-faint); }
.l-ledger__go { color: var(--accent); opacity: 0; transform: translate(-4px, 2px); transition: opacity .14s ease, transform .14s ease; }
.l-ledger__row:hover .l-ledger__go { opacity: 1; transform: none; }

/* --- 05 compounding loop --- */
.l-compound .l-loop { position: relative; margin-top: clamp(56px, 8vw, 88px); padding-top: 46px; }
.l-loop__arc { position: absolute; top: 0; left: 0; width: 100%; height: 92px; overflow: visible; }
.l-loop__row { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.l-loop__node {
  position: relative; border: 1px solid var(--border); border-radius: var(--l-r); background: var(--bg);
  padding: 20px 18px 18px; font-weight: 600; font-size: .92rem; line-height: 1.35;
}
.l-loop__node:not(:last-child)::after {
  content: "\2192"; position: absolute; right: -18px; top: 50%; transform: translateY(-50%);
  color: var(--text-faint); font: 400 1rem/1 var(--mono); z-index: 2;
}
.l-loop__k { display: block; font: 600 .68rem/1 var(--mono); color: var(--text-faint); letter-spacing: .06em; margin-bottom: 10px; }
.l-loop__node--gain { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.l-loop__node--gain .l-loop__k { color: var(--accent); }

/* --- 06 ownership --- */
.l-own { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 340px); gap: clamp(32px, 6vw, 76px); align-items: center; }
.l-own__points { list-style: none; margin: 22px 0 0; padding: 0; display: grid; gap: 12px; }
.l-own__points li { position: relative; padding-left: 22px; font-size: .95rem; color: var(--text); }
.l-own__points li::before { content: "\2014"; position: absolute; left: 0; color: var(--accent); font-family: var(--mono); }
.l-own__diagram { display: grid; }
.l-own__side {
  justify-self: end; margin-bottom: 22px; position: relative;
  font: 600 .68rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--text-faint);
  border: 1px dashed var(--border); border-radius: var(--l-r); padding: 10px 14px; max-width: 220px; text-align: center;
}
.l-own__side::after {
  content: ""; position: absolute; left: 50%; bottom: -22px; width: 1px; height: 22px;
  background: repeating-linear-gradient(var(--border) 0 3px, transparent 3px 6px);
}
.l-own__stack { display: grid; gap: 12px; }
.l-own__layer {
  border: 1px solid var(--border); border-radius: var(--l-r); background: var(--bg);
  padding: 18px 20px; font-weight: 600; font-size: .95rem; text-align: center; position: relative;
}
.l-own__layer:not(:last-child)::after { content: ""; position: absolute; left: 50%; bottom: -13px; width: 1px; height: 12px; background: var(--border); z-index: 1; }
.l-own__layer--product { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); font-weight: 680; }

/* --- 07 rail + AI --- */
.l-rail {
  display: grid; grid-template-columns: minmax(0, auto) 1px minmax(0, 1fr); gap: 0;
  border: 1px solid var(--border); border-radius: var(--l-r); overflow: hidden;
  margin-top: clamp(28px, 4vw, 44px);
}
.l-rail__seg { padding: clamp(20px, 3vw, 30px); display: flex; flex-direction: column; gap: 14px; }
.l-rail__seg--free { background: var(--bg); }
.l-rail__seg--svc { background: var(--surface); }
.l-rail__mark { background: var(--border); }
.l-rail__label { font: 650 .68rem/1.5 var(--mono); text-transform: uppercase; letter-spacing: .12em; color: var(--text-faint); display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.l-rail__seg--free .l-rail__label { color: var(--accent); }
.l-rail__items { display: flex; flex-wrap: wrap; gap: 8px; }
.l-rail__item { border: 1px solid var(--border); border-radius: var(--l-r); padding: 9px 14px; font-weight: 620; font-size: .84rem; background: var(--bg); }
.l-rail__seg--free .l-rail__item { border-color: color-mix(in srgb, var(--accent) 42%, var(--border)); }
.l-rail__item.is-ghost { border-style: dashed; color: var(--text-faint); background: transparent; font-weight: 540; }

.l-terminal { margin-top: clamp(24px, 3vw, 34px); border: 1px solid var(--border); border-radius: var(--l-r); overflow: hidden; background: var(--surface); max-width: 640px; }
.l-terminal__bar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 16px; border-bottom: 1px solid var(--border);
  font: 600 .7rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--text-faint);
}
.l-terminal__body { padding: 16px; display: grid; gap: 9px; font-family: var(--mono); font-size: .85rem; line-height: 1.5; }
.l-terminal__ln { color: var(--text); }
.l-terminal__p { color: var(--accent); margin-right: 10px; font-weight: 700; }
.l-pipe { list-style: none; margin: clamp(24px, 3vw, 32px) 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 4px; align-items: center; }
.l-pipe li { font: 600 .72rem/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); }
.l-pipe li:not(:last-child)::after { content: "\2192"; margin: 0 4px 0 8px; color: var(--text-faint); }

/* --- 08 tiers --- */
.l-tiers { margin-top: clamp(28px, 4vw, 44px); max-width: 640px; display: grid; }
.l-tier { display: grid; grid-template-columns: 168px 1fr; gap: 20px; align-items: start; padding: 22px 0; border-top: 1px solid var(--border); }
.l-tier:last-child { border-bottom: 1px solid var(--border); }
.l-tier__k { font: 650 .72rem/1.5 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--text-faint); }
.l-tier p { color: var(--text-muted); font-size: .95rem; line-height: 1.55; }
.l-tier--paid { position: relative; }
.l-tier--paid .l-tier__k { color: var(--accent); }
.l-tier--paid::before { content: ""; position: absolute; left: -16px; top: 22px; bottom: 22px; width: 2px; background: var(--accent); }

/* --- 09 roadmap ledger --- */
.l-rm { margin-top: clamp(28px, 4vw, 44px); }
.l-rm__head {
  font: 650 .8rem/1 var(--mono); text-transform: uppercase; letter-spacing: .14em; color: var(--text);
  padding-bottom: 12px; border-bottom: 1px solid var(--text); margin-top: 44px;
}
.l-rm__head:first-child { margin-top: 0; }
.l-rm ul { list-style: none; margin: 0; padding: 0; }
.l-rm__row { display: grid; grid-template-columns: 16px 190px 1fr auto; align-items: baseline; gap: 8px 20px; padding: 16px 0; border-bottom: 1px solid var(--border); }
.l-rm__dot { width: 9px; height: 9px; border-radius: 50%; border: 1.5px solid var(--text-faint); align-self: center; }
.l-rm__dot--on { background: var(--accent); border-color: var(--accent); }
.l-rm__name { font-weight: 640; font-size: .95rem; }
.l-rm__desc { color: var(--text-muted); font-size: .9rem; }
.l-rm__tag { font: 600 .7rem/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--text-faint); white-space: nowrap; }

/* --- 10 FAQ --- */
.lp .l-faq { max-width: 760px; display: block; margin-top: clamp(28px, 4vw, 44px); }
.lp .l-faq .faq__item { border: 0; border-top: 1px solid var(--border); border-radius: 0; background: transparent; padding: 0; }
.lp .l-faq .faq__item:last-child { border-bottom: 1px solid var(--border); }
.lp .l-faq summary { padding: 20px 0; font-size: 1.02rem; font-weight: 560; display: flex; justify-content: space-between; gap: 24px; align-items: baseline; }
.lp .l-faq summary::after { content: "+"; float: none; font: 400 1.2rem/1 var(--mono); color: var(--text-faint); }
.lp .l-faq .faq__item[open] summary { color: var(--accent); }
.lp .l-faq .faq__item[open] summary::after { content: "\2212"; color: var(--accent); }
.lp .l-faq .faq__item p { margin: 0; padding: 0 0 22px; max-width: 62ch; color: var(--text-muted); font-size: .95rem; line-height: 1.6; }

/* --- final --- */
.l-final { position: relative; border-top: 1px solid var(--border); background: var(--surface); padding-block: clamp(84px, 13vw, 150px); text-align: center; overflow: hidden; }
.l-final::before { -webkit-mask-image: radial-gradient(100% 100% at 50% 50%, #000, transparent 70%); mask-image: radial-gradient(100% 100% at 50% 50%, #000, transparent 70%); }
.l-final > * { position: relative; z-index: 1; }
.l-final h2 { font-size: var(--l-h2); max-width: 20ch; margin: 0 auto 18px; letter-spacing: -.025em; }
.l-final .l-lead { margin: 0 auto; max-width: 48ch; }
.l-final .l-cta-row { justify-content: center; margin-top: 34px; }
.l-final .l-status { justify-content: center; border: 0; margin-top: 38px; padding-top: 0; }

/* --- motion --- the .lp-anim gate is set on <html> before first paint,
   only when motion is allowed, so nothing ever flashes for reduced-motion
   or no-JS visitors (they get the fully-visible page). --- */
.lp-anim .lp [data-reveal] > * {
  opacity: 0; transform: translateY(16px);
  transition: opacity .6s cubic-bezier(.2, .6, .2, 1), transform .6s cubic-bezier(.2, .6, .2, 1);
}
.lp-anim .lp [data-reveal].is-in > * { opacity: 1; transform: none; }
.lp-anim .lp [data-reveal].is-in > *:nth-child(2) { transition-delay: .05s; }
.lp-anim .lp [data-reveal].is-in > *:nth-child(3) { transition-delay: .1s; }
.lp-anim .lp [data-reveal].is-in > *:nth-child(4) { transition-delay: .15s; }
.lp-anim .lp [data-reveal].is-in > *:nth-child(n+5) { transition-delay: .2s; }

.lp-anim .lp .l-hero__art .l-hero__layer { opacity: 0; transform: translateY(16px); }
.lp-anim .l-hero.is-in .l-hero__art .l-hero__layer {
  animation: lp-layer .6s cubic-bezier(.2, .7, .2, 1) forwards;
  animation-delay: calc(var(--k, 0) * .09s + .12s);
}
@keyframes lp-layer { to { opacity: 1; transform: none; } }

.lp-anim .lp .l-merge__out { opacity: 0; }
.lp-anim .lp .l-compound .l-loop__arc path { stroke-dasharray: 1; stroke-dashoffset: 1; }
.lp-anim .lp [data-reveal].is-in .l-merge__out { animation: lp-pop .55s cubic-bezier(.2, .8, .2, 1) .3s forwards; }
.lp-anim .lp [data-reveal].is-in .l-loop__arc path { transition: stroke-dashoffset 1.1s ease .25s; stroke-dashoffset: 0; }
@keyframes lp-pop { from { opacity: 0; transform: scale(.94); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  .lp *, .lp *::before, .lp *::after { animation: none !important; transition: none !important; }
}

/* --- responsive --- */
@media (max-width: 940px) {
  .lp .topnav a[href^="#"] { display: none; }
  .lp .topnav { gap: 16px; }
}
@media (max-width: 900px) {
  .l-hero__inner { grid-template-columns: 1fr; }
  .l-hero__art { display: none; }
  .l-foundation, .l-own { grid-template-columns: 1fr; }
  .l-foundation__intro { position: static; }
}
@media (max-width: 760px) {
  .lp .ztree__branches { flex-direction: column; align-items: center; border: 0; padding: 8px 0 0; gap: 30px; }
  .lp .ztree__node { flex: 0 0 auto; width: 100%; max-width: 300px; height: auto; }
  .lp .ztree__node::before { height: 18px; top: -19px; }
  .lp .ztree__root::after { height: 16px; }
  .lp .l-arch__base { margin-top: 22px; }
  .lp .l-arch__base::before { display: none; }
  .lp .split { grid-template-columns: 1fr; }
  .lp .split__col + .split__col { border-left: 0; border-top: 1px solid var(--border); }
  .l-timeline { grid-template-columns: 1fr; gap: 4px; }
  .l-timeline::before { left: 13px; right: auto; top: 0; bottom: 0; width: 1px; height: auto; }
  .l-timeline li { padding: 10px 0 10px 0; display: grid; grid-template-columns: 28px 1fr; gap: 14px; align-items: center; }
  .l-timeline__t { margin-top: 0; max-width: none; }
  .l-loop { padding-top: 0 !important; padding-left: 22px; }
  .l-loop__arc { display: none; }
  .l-loop__row { grid-template-columns: 1fr; gap: 30px; }
  .l-loop::before { content: ""; position: absolute; left: 5px; top: 14px; bottom: 14px; width: 1px; background: var(--border); }
  .l-loop__node:not(:last-child)::after { content: "\2193"; right: auto; left: 18px; top: auto; bottom: -22px; transform: none; }
  .l-rail { grid-template-columns: 1fr; }
  .l-rail__mark { height: 1px; }
  .l-ledger__row { grid-template-columns: 1fr auto; gap: 4px 14px; padding: 18px 0; }
  .l-ledger__row:hover { padding-left: 10px; padding-right: 10px; }
  .l-ledger__desc { grid-column: 1 / -1; order: 3; }
  .l-ledger__meta { text-align: right; }
  .l-ledger__go { display: none; }
  .l-rm__row { grid-template-columns: 16px 1fr; }
  .l-rm__desc, .l-rm__tag { grid-column: 2; }
  .l-rm__tag { margin-top: 2px; }
  .l-own__side { justify-self: start; }
}
@media (max-width: 620px) {
  .l-merge { flex-direction: column; }
  .l-merge__op { padding: 2px 0; }
  .l-figure { max-width: none; }
  .l-tier { grid-template-columns: 1fr; gap: 6px; }
}
@media (max-width: 540px) {
  .l-hero__art { display: none; }
}