/* ============================================================
   tessa.foundation — TessaFORGE design system  ·  v2
   Night (app-grade terminal) is the default; Day (doc-grade
   dossier) via [data-theme="day"]. Palette (Brand v0.2):
   navy #0E1A3C · royal #1C2C60 · teal #138A83 · amber #C6892F
   cream #FBF4E7.
   Display rule: "Tessa" = identifier (ink, mixed case);
   the FUNCTION (FORGE/SCAN/DEX/DAPP) = caps, always amber.
   Teal is strictly functional: verified · live · success.
   ============================================================ */

:root {
  /* palette anchors (theme-independent) */
  --navy: #0E1A3C;
  --royal: #1C2C60;
  --teal: #138A83;
  --amber: #C6892F;
  --cream: #FBF4E7;

  /* night theme (default) */
  --bg: #0E1A3C;
  --bg-raise: #122048;
  --panel: #16254F;
  --panel-2: #1C2C60;
  --paper: #FFFDF6;
  --text: #E9EDF6;
  --text-muted: #A9B3CC;
  --text-faint: #76829F;
  --ink-on-accent: #0E1A3C;
  --hairline: rgba(233, 237, 246, 0.14);
  --hairline-strong: rgba(233, 237, 246, 0.26);
  --amber-text: #D69A3F;      /* amber tuned for small text on this ground */
  --amber-display: #C6892F;   /* amber for display-size type on this ground */
  --teal-text: #2CBFB2;
  --serif-accent: #D69A3F;
  --mark-field: #0E1A3C;
  --shadow-card: 0 24px 60px rgba(4, 10, 28, 0.5);
  --m-navy: #12224C;
  --m-royal: #2A3F7E;
  --grid-line: rgba(233, 237, 246, 0.028);
  --bp-line: rgba(44, 191, 178, 0.07);
  --ghost-stroke: rgba(233, 237, 246, 0.07);

  --font-sans: "Archivo", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;

  --container: 1160px;
  --radius: 3px;

  color-scheme: dark;
}

[data-theme="day"] {
  /* day ground is paper-white; raised surfaces (cards, sheets) are cream —
     the dossier sits on the desk, not the other way around */
  --bg: #FFFDF6;
  --bg-raise: #F6EDDC;
  --panel: #FBF4E7;
  --panel-2: #F7EEDC;
  --paper: #FBF4E7;
  --text: #0E1A3C;
  --text-muted: #46527A;
  --text-faint: #7D87A6;
  --hairline: rgba(14, 26, 60, 0.16);
  --hairline-strong: rgba(14, 26, 60, 0.32);
  --amber-text: #8F621C;
  --amber-display: #A9761E;
  --teal-text: #0E6B65;
  /* italic taglines read amber in day too — green didn't sit right on paper */
  --serif-accent: #8F621C;
  --mark-field: #0E1A3C;
  --shadow-card: 0 18px 44px rgba(14, 26, 60, 0.16);
  --m-navy: #0E1A3C;
  --m-royal: #2E4590;         /* clearly distinct from the navy segment */
  --grid-line: transparent;
  --bp-line: rgba(14, 26, 60, 0.06);
  --ghost-stroke: rgba(14, 26, 60, 0.075);

  color-scheme: light;
}

/* ---------- reset & base ---------- */

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

/* Ambient ground: vignettes + engineering grid (night) / warm paper (day),
   painted as fixed-attachment backgrounds on the root element — no extra
   layers, no pseudo elements, capture/print-safe. Grain opacity is baked
   into the SVG itself. */
html {
  background-color: var(--bg);
  background-image:
    url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20width='180'%20height='180'%3E%3Cfilter%20id='n'%3E%3CfeTurbulence%20type='fractalNoise'%20baseFrequency='0.85'%20numOctaves='2'%20stitchTiles='stitch'/%3E%3C/filter%3E%3Crect%20width='100%25'%20height='100%25'%20filter='url(%23n)'%20opacity='0.05'/%3E%3C/svg%3E"),
    radial-gradient(1100px 720px at 82% -12%, rgba(42, 63, 126, 0.30), transparent 62%),
    radial-gradient(900px 680px at -12% 108%, rgba(19, 138, 131, 0.10), transparent 55%),
    repeating-linear-gradient(0deg, var(--grid-line) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(90deg, var(--grid-line) 0 1px, transparent 1px 48px);
  transition: background-color .45s ease;
}
html[data-theme="day"] {
  background-image:
    url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20width='180'%20height='180'%3E%3Cfilter%20id='n'%3E%3CfeTurbulence%20type='fractalNoise'%20baseFrequency='0.85'%20numOctaves='2'%20stitchTiles='stitch'/%3E%3C/filter%3E%3Crect%20width='100%25'%20height='100%25'%20filter='url(%23n)'%20opacity='0.06'/%3E%3C/svg%3E"),
    radial-gradient(1000px 700px at 82% -12%, rgba(198, 137, 47, 0.10), transparent 60%),
    radial-gradient(900px 680px at -10% 110%, rgba(14, 26, 60, 0.05), transparent 55%);
}

body {
  margin: 0;
  background: transparent;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  transition: color .45s ease;
}

h1, h2, h3, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
b { font-weight: inherit; }
img, svg { max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

::selection { background: var(--amber); color: var(--ink-on-accent); }

:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 48px);
}

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--amber); color: var(--ink-on-accent);
  font-family: var(--font-mono); font-size: .78rem; letter-spacing: .12em;
  padding: 10px 18px; z-index: 100;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ---------- wordmark ---------- */

.wordmark b { color: var(--amber-display); }

/* ---------- meridian bars ---------- */

.meridian { display: flex; height: 5px; }
.meridian i { display: block; height: 100%; }
.meridian .m-navy  { flex: 0 0 28%; background: var(--m-navy); }
.meridian .m-royal { flex: 0 0 26%; background: var(--m-royal); }
.meridian .m-teal  { flex: 0 0 24%; background: var(--teal); }
.meridian .m-amber { flex: 1; background: var(--amber); }
.meridian-card { height: 4px; }
.meridian-bottom { height: 7px; }

/* ---------- header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid var(--hairline);
  transition: background-color .45s ease;
}

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; height: 68px;
}

.brand { display: inline-flex; align-items: center; gap: 12px; }
.tf-mark { width: 42px; height: 42px; flex: none; }
.brand-word {
  font-weight: 800; font-size: 1.12rem; letter-spacing: .01em;
  font-stretch: 110%;
}
.brand-word b { color: var(--amber-text); }

.site-nav { display: flex; align-items: center; }
.nav-toggle { display: none; }
.nav-menu { display: flex; align-items: center; gap: clamp(14px, 2.2vw, 26px); }
.nav-menu a {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--text-muted);
  display: inline-flex; gap: 7px; align-items: baseline;
  padding: 6px 2px;
}
.nav-menu a i { font-style: normal; color: var(--amber-text); font-size: .62rem; }
.nav-menu a:hover { color: var(--text); }

.theme-toggle {
  display: inline-flex; gap: 0; align-items: stretch;
  border: 1px solid var(--hairline-strong); border-radius: var(--radius);
  font-family: var(--font-mono); font-size: .64rem; letter-spacing: .1em;
  overflow: hidden;
}
.theme-toggle span { padding: 7px 10px; color: var(--text-faint); transition: .3s; white-space: nowrap; }
[data-theme="night"] .theme-toggle .tt-night,
[data-theme="day"] .theme-toggle .tt-day {
  background: var(--amber); color: var(--ink-on-accent); font-weight: 700;
}

/* ---------- hero ---------- */

.hero {
  padding-block: clamp(56px, 8vh, 100px) clamp(56px, 8vh, 96px);
  position: relative;
  overflow: hidden;
}

.hero-eyebrow {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .22em;
  color: var(--amber-text); margin-bottom: 26px;
}

.hero-title {
  font-size: clamp(2.5rem, 8.6vw, 7.6rem);
  font-weight: 900; font-stretch: 114%;
  letter-spacing: -.025em; line-height: .96;
  white-space: nowrap;
}
.ht-ink { color: var(--text); }
.ht-amber { color: var(--amber-display); }

.hero-grid {
  display: grid; grid-template-columns: 1.05fr .95fr;
  gap: clamp(40px, 6vw, 88px); align-items: center;
  margin-top: clamp(26px, 4vh, 42px);
}
.hero-copy, .hero-card { min-width: 0; }

.hero-tagline {
  font-family: var(--font-serif); font-style: italic; font-weight: 500;
  font-size: clamp(1.25rem, 2.6vw, 1.6rem);
  color: var(--serif-accent);
}

.hero-sub {
  color: var(--text-muted); max-width: 54ch;
  font-size: clamp(1rem, 1.5vw, 1.14rem);
  margin-top: 18px;
}

.hero-strap {
  font-family: var(--font-mono); font-size: .7rem; letter-spacing: .24em;
  color: var(--text-faint);
  border-block: 1px solid var(--hairline);
  padding-block: 12px; margin-top: 30px;
  display: inline-block;
}

.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }

/* ---------- buttons ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 26px; border-radius: 2px;
  font-weight: 700; font-size: .95rem; letter-spacing: .01em;
  border: 1px solid transparent;
  transition: transform .18s ease, background-color .18s ease, border-color .18s ease, color .18s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--amber); color: var(--ink-on-accent); }
.btn-primary:hover { background: #D9993A; }
.btn-ghost { border-color: var(--hairline-strong); color: var(--text); }
.btn-ghost:hover { border-color: var(--amber); color: var(--amber-text); }

/* ---------- hero mode cards ---------- */

.hero-card { display: grid; }

.mode-card {
  grid-area: 1 / 1;
  display: flex; flex-direction: column;
  border-radius: var(--radius);
  transition: opacity .5s ease, transform .5s ease;
}

/* — night: the TF terminal — */
.card-night {
  background: linear-gradient(160deg, #1D2E66 0%, #16254F 58%, #132147 100%);
  border: 1px solid var(--hairline);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.card-topline {
  display: flex; justify-content: space-between;
  font-family: var(--font-mono); font-size: .64rem; letter-spacing: .16em;
  color: var(--text-faint); text-transform: uppercase;
  padding: 12px 20px;
  border-bottom: 1px solid var(--hairline);
}
.live-dot { color: var(--teal-text); }

.term-tabs {
  display: flex; gap: 2px;
  padding: 0 12px;
  border-bottom: 1px solid var(--hairline);
  background: rgba(4, 10, 28, .25);
}
.term-tab {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .18em;
  color: var(--text-faint);
  padding: 11px 14px 9px;
  border-bottom: 2px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.term-tab:hover { color: var(--text); }
.term-tab.is-active { color: var(--amber-text); border-bottom-color: var(--amber); }

.term-panels { position: relative; flex: 1; }
.term-panel { padding: 22px 20px 16px; display: none; flex-direction: column; min-height: 268px; }
.term-panel.is-active { display: flex; }

.card-label { font-family: var(--font-mono); font-size: .66rem; letter-spacing: .2em; color: var(--teal-text); }
.card-title { font-weight: 800; font-size: 1.7rem; font-stretch: 110%; margin-top: 8px; letter-spacing: 0; }
.card-title .wordmark b { color: var(--amber-text); }
.card-lines { margin-top: 16px; display: grid; gap: 9px; }
.card-lines li {
  font-family: var(--font-mono); font-size: .8rem; color: var(--text);
  display: flex; align-items: baseline; gap: 10px;
}
.ln-prompt { color: var(--amber-text); }
.ln-ok { margin-left: auto; color: var(--teal-text); font-size: .68rem; letter-spacing: .08em; }
.card-cursor {
  display: inline-block; width: 9px; height: 16px; margin-top: 14px;
  background: var(--teal-text);
  animation: tf-blink 1.1s steps(1) infinite;
}
@keyframes tf-blink { 50% { opacity: 0; } }
.term-panel .card-footline {
  margin-top: auto; padding-top: 14px;
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: .14em;
  color: var(--text-faint); text-transform: uppercase;
  border-top: 1px solid var(--hairline);
}

/* line type-in on reveal */
html.js .card-lines li { opacity: 0; transform: translateX(-6px); }
html.js .reveal.is-in .card-lines li,
html.js .term-panel.is-active .card-lines li {
  opacity: 1; transform: none;
  transition: opacity .4s ease, transform .4s ease;
  transition-delay: calc(var(--d, 0) * 110ms);
}

/* — day: the dossier pile — */
.card-day { position: relative; }
.card-day .sheet {
  position: absolute; inset: 0;
  background: var(--paper);
  border: 1px solid rgba(14, 26, 60, .08);
  border-radius: var(--radius);
  box-shadow: 0 14px 36px rgba(14, 26, 60, .12);
}
.card-day .sheet-b { transform: rotate(2.2deg) translate(10px, 8px); }
.card-day .sheet-a { transform: rotate(-2.6deg) translate(-8px, 4px); }
.card-day .sheet-main {
  position: relative;
  display: flex; flex-direction: column;
  background: var(--paper);
  color: #0E1A3C;
  border: 1px solid rgba(14, 26, 60, .10);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transform: rotate(-1.1deg);
  min-height: 100%;
}
.card-day .card-body { padding: 34px 30px 22px; flex: 1; position: relative; }
.card-kicker { font-family: var(--font-mono); font-size: .64rem; letter-spacing: .24em; color: #8F621C; }
.card-title-day { font-weight: 800; font-size: 2rem; font-stretch: 110%; margin-top: 14px; color: #0E1A3C; }
.card-title-day .wordmark b { color: #A9761E; }
.card-serif { font-family: var(--font-serif); font-style: italic; font-size: 1.06rem; color: #22315C; margin-top: 10px; max-width: 30ch; }
.card-seal { position: absolute; right: 24px; bottom: 16px; width: 60px; height: 60px; opacity: .95; }
.card-day .card-footline {
  font-family: var(--font-mono); font-size: .64rem; letter-spacing: .16em;
  color: #7D87A6; text-transform: uppercase;
  padding: 12px 20px;
  border-top: 1px solid rgba(14, 26, 60, .14);
}

/* theme-driven card swap */
[data-theme="night"] .card-day { opacity: 0; transform: translateY(14px); pointer-events: none; }
[data-theme="night"] .card-night { opacity: 1; }
[data-theme="day"] .card-night { opacity: 0; transform: translateY(14px); pointer-events: none; }
[data-theme="day"] .card-day { opacity: 1; }

/* ---------- ticker ---------- */

.ticker {
  overflow: hidden;
  border-block: 1px solid var(--hairline);
  background: color-mix(in srgb, var(--bg-raise) 70%, var(--bg));
  padding-block: 11px;
}
.ticker-track {
  display: inline-flex; align-items: baseline; gap: 28px;
  white-space: nowrap;
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .22em;
  color: var(--text-faint);
  animation: tf-ticker 56s linear infinite;
}
.ticker-track i { font-style: normal; color: var(--amber-text); font-size: .55rem; }
.ticker-track span { padding-right: 0; }
@keyframes tf-ticker { to { transform: translateX(-50%); } }

/* ---------- sections & exhibit furniture ---------- */

.section { padding-block: clamp(84px, 11vw, 138px); border-bottom: 1px solid var(--hairline); position: relative; }
[data-theme="day"] .section { border-bottom-style: dashed; }

.exhibit { position: relative; }

/* registration crop-marks in the section's top corners */
.exhibit::before, .exhibit::after {
  content: "";
  position: absolute; top: -26px; width: 13px; height: 13px;
  background:
    linear-gradient(to right, transparent calc(50% - .5px), var(--hairline-strong) calc(50% - .5px), var(--hairline-strong) calc(50% + .5px), transparent calc(50% + .5px)),
    linear-gradient(to bottom, transparent calc(50% - .5px), var(--hairline-strong) calc(50% - .5px), var(--hairline-strong) calc(50% + .5px), transparent calc(50% + .5px));
  opacity: .8;
}
.exhibit::before { left: clamp(20px, 5vw, 48px); }
.exhibit::after { right: clamp(20px, 5vw, 48px); }

.exhibit-head { display: flex; align-items: stretch; gap: 0; margin-bottom: 30px; }
.exhibit-tab {
  font-family: var(--font-mono); font-size: .74rem; font-weight: 700; letter-spacing: .1em;
  color: var(--ink-on-accent);
  background: var(--amber);
  padding: 6px 16px 6px 12px;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 100%, 0 100%);
  display: inline-flex; align-items: center;
}
.exhibit-kicker {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .22em;
  color: var(--text-muted); text-transform: uppercase; white-space: nowrap;
  display: inline-flex; align-items: center;
  border: 1px solid var(--hairline);
  border-left: 0;
  padding: 6px 16px;
}
.exhibit-rule { flex: 1; align-self: center; height: 1px; background: var(--hairline); }

.ghost-num {
  position: absolute; top: 20px; right: clamp(4px, 2vw, 24px);
  font-family: var(--font-sans);
  font-size: clamp(7rem, 16vw, 13rem); font-weight: 900; font-stretch: 114%;
  line-height: 1; letter-spacing: -.02em;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--ghost-stroke);
  text-stroke: 1.5px var(--ghost-stroke);
  pointer-events: none; user-select: none;
  z-index: 0;
}
.section-heading, .section-tagline, .section-lead { position: relative; z-index: 1; }

.section-heading {
  font-size: clamp(2.05rem, 4.6vw, 3.3rem);
  font-weight: 800; font-stretch: 108%;
  letter-spacing: -.012em; line-height: 1.04;
  max-width: 18ch;
}

.section-tagline {
  font-family: var(--font-serif); font-style: italic; font-weight: 500;
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  color: var(--serif-accent);
  margin-top: 12px;
}

.section-lead {
  color: var(--text-muted); max-width: 66ch;
  font-size: clamp(1rem, 1.5vw, 1.16rem);
  margin-top: 22px;
}

/* ---------- thesis ---------- */

.thesis-grid {
  display: grid; grid-template-columns: 1.25fr .75fr;
  gap: clamp(36px, 5vw, 72px);
  margin-top: 44px; align-items: start;
}
.thesis-text p { color: var(--text-muted); max-width: 62ch; }
.thesis-text p + p { margin-top: 18px; }

.thesis-points { display: grid; gap: 0; border: 1px solid var(--hairline); border-radius: var(--radius); background: var(--panel); }
.thesis-points li { padding: 20px 22px; display: grid; gap: 6px; }
.thesis-points li + li { border-top: 1px solid var(--hairline); }
.pt-k { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .18em; color: var(--amber-text); }
.pt-v { color: var(--text-muted); font-size: .95rem; }

/* ---------- products ---------- */

.product-list { display: grid; gap: 18px; margin-top: 46px; }

.product {
  display: grid; grid-template-columns: 5px 1fr;
  background: var(--panel);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.product:hover { border-color: var(--hairline-strong); transform: translateY(-2px); box-shadow: var(--shadow-card); }
.product-bar { height: 100%; background: var(--amber); transition: width .25s ease; }
.product > :not(.product-bar) { grid-column: 2; }

.product-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 18px;
  padding: 24px 28px 0;
}
.product-name { font-weight: 800; font-size: clamp(1.35rem, 2.4vw, 1.75rem); font-stretch: 110%; letter-spacing: 0; }
.product-name .wordmark b { color: var(--amber-text); }
.product-tag { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .14em; color: var(--text-faint); text-transform: uppercase; white-space: nowrap; }
.product-section { color: var(--amber-text); margin-right: 6px; }

.product-desc { color: var(--text-muted); padding: 12px 28px 0; max-width: 74ch; font-size: .99rem; }

.product-bullets {
  display: flex; flex-wrap: wrap; gap: 10px 28px;
  padding: 18px 28px 24px;
}
.product-bullets li {
  font-family: var(--font-mono); font-size: .74rem; letter-spacing: .04em;
  color: var(--text-muted);
}
.product-bullets li span { color: var(--teal-text); margin-right: 6px; }

.forge-strip {
  margin-top: 34px; padding: 24px 28px;
  border: 1px dashed var(--hairline-strong); border-radius: var(--radius);
}
.forge-kicker { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .22em; color: var(--amber-text); }
.forge-note { color: var(--text-faint); font-size: .9rem; margin-top: 6px; }
.forge-items { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 18px; }
.forge-items li { display: grid; gap: 6px; }
.fi-name { font-family: var(--font-mono); font-size: .8rem; font-weight: 700; letter-spacing: .16em; color: var(--text); }
.fi-desc { color: var(--text-muted); font-size: .92rem; }

/* ---------- architecture: the blueprint ---------- */

.arch-grid {
  display: grid; grid-template-columns: 1.2fr .8fr;
  gap: clamp(36px, 5vw, 72px);
  margin-top: 46px; align-items: start;
}

.blueprint {
  position: relative;
  padding: 46px 22px 22px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background:
    repeating-linear-gradient(0deg, var(--bp-line) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(90deg, var(--bp-line) 0 1px, transparent 1px 24px),
    color-mix(in srgb, var(--panel) 55%, var(--bg));
}
.fig-label {
  position: absolute; top: 14px; right: 18px;
  font-family: var(--font-mono); font-size: .64rem; letter-spacing: .18em;
  color: var(--text-faint); text-transform: uppercase;
}
.arch-stack { display: grid; gap: 10px; position: relative; }
/* plumb line through the layer nodes */
.arch-stack::before {
  content: "";
  position: absolute; top: 8px; bottom: 8px; left: 21px; width: 1px;
  background: linear-gradient(var(--hairline-strong), var(--hairline-strong)) center / 1px 100% no-repeat;
  opacity: .8;
}
.arch-layer {
  display: grid; grid-template-columns: 46px 112px minmax(0, 1.05fr) minmax(0, .95fr);
  gap: 14px; align-items: baseline;
  padding: 14px 16px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--panel-2) calc(88% - var(--i) * 11%), var(--bg));
  position: relative;
  transition: border-color .25s ease;
}
.arch-layer:hover { border-color: var(--hairline-strong); }
.al-idx {
  font-family: var(--font-mono); font-size: .62rem; color: var(--text-faint);
  position: relative; padding-left: 14px;
}
.al-idx::before {
  content: "";
  position: absolute; left: 2px; top: 50%; transform: translateY(-50%);
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--amber) 25%, transparent);
}
.al-name { font-family: var(--font-mono); font-size: .74rem; font-weight: 700; letter-spacing: .16em; color: var(--amber-text); }
.al-desc { font-size: .95rem; color: var(--text); }
.al-detail { font-family: var(--font-mono); font-size: .66rem; letter-spacing: .06em; color: var(--text-faint); text-align: right; }

.arch-principles { display: grid; gap: 26px; }
.arch-principle h3 {
  font-family: var(--font-mono); font-size: .78rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--teal-text); font-weight: 700;
}
.arch-principle p { color: var(--text-muted); font-size: .95rem; margin-top: 8px; max-width: 46ch; }

/* ---------- portals / white-label ---------- */

.steps {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  margin-top: 46px;
}
.step {
  border: 1px solid var(--hairline); border-radius: var(--radius);
  padding: 22px; display: grid; gap: 8px; align-content: start;
  background: var(--panel);
}
.step-n { font-family: var(--font-mono); font-size: 1.9rem; font-weight: 700; color: var(--amber-text); line-height: 1; }
.step-k { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .2em; color: var(--text); }
.step-v { color: var(--text-muted); font-size: .92rem; }

.offer {
  margin-top: 34px; padding: 30px;
  background: var(--panel); border: 1px solid var(--hairline); border-radius: var(--radius);
  display: grid; gap: 20px;
}
.offer-kicker { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .22em; color: var(--amber-text); }
.offer-items { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 32px; }
.offer-items li { color: var(--text-muted); font-size: .97rem; padding-left: 22px; position: relative; }
.offer-items li::before { content: "\2713"; position: absolute; left: 0; color: var(--teal-text); }
.offer .btn { justify-self: start; }

/* ---------- foundation ---------- */

.foundation-seal {
  position: absolute; top: -6px; right: clamp(8px, 4vw, 56px);
  width: clamp(120px, 14vw, 168px); height: auto;
  transform: rotate(-11deg);
  opacity: .92;
  z-index: 1;
}
/* the seal IS this section's device — no ghost number behind it */
#foundation .ghost-num { display: none; }

.principle-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px;
  margin-top: 46px;
}
.principle {
  border: 1px solid var(--hairline); border-radius: var(--radius);
  background: var(--panel);
  padding: 26px 28px;
}
.pr-k { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .22em; color: var(--amber-text); }
.pr-t { font-weight: 800; font-size: 1.28rem; font-stretch: 108%; margin-top: 10px; }
.pr-v { color: var(--text-muted); font-size: .96rem; margin-top: 10px; }

/* ---------- contact ---------- */

.section-contact { border-bottom: 0; }
.contact-panel {
  margin-top: 44px; padding: 34px 36px;
  background: var(--panel);
  border: 1px solid var(--hairline);
  border-left: 4px solid var(--amber);
  border-radius: var(--radius);
  display: grid; gap: 12px;
}
.contact-mail {
  font-weight: 800; font-size: clamp(1.4rem, 3.4vw, 2.1rem); font-stretch: 108%;
  color: var(--text); width: fit-content;
  border-bottom: 2px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.contact-mail:hover { color: var(--amber-text); border-color: var(--amber); }
.contact-note { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .18em; color: var(--text-faint); }

/* ---------- footer ---------- */

.site-footer { background: var(--bg-raise); position: relative; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr .8fr .8fr;
  gap: clamp(28px, 5vw, 64px);
  padding-block: 56px 40px;
}
.tf-mark-footer { width: 38px; height: 38px; }
.footer-line { font-family: var(--font-serif); font-style: italic; color: var(--text-muted); margin-top: 16px; }
.footer-legal { color: var(--text-faint); font-size: .84rem; margin-top: 10px; }
.footer-col-title { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .22em; color: var(--amber-text); margin-bottom: 14px; }
.footer-col ul { display: grid; gap: 9px; }
.footer-col a { font-family: var(--font-mono); font-size: .78rem; color: var(--text-muted); }
.footer-col a:hover { color: var(--text); }
.footer-meta {
  display: flex; justify-content: space-between; gap: 14px 20px; flex-wrap: wrap;
  border-top: 1px solid var(--hairline);
  padding-block: 18px 22px;
  font-family: var(--font-mono); font-size: .66rem; letter-spacing: .14em;
  color: var(--text-faint);
}

/* ---------- 404 & legal ---------- */

.page-404 { min-height: 100svh; display: grid; place-items: center; }
.notfound { text-align: center; padding: 40px 24px; display: grid; justify-items: center; gap: 18px; }
.tf-mark-404 { width: 72px; height: 72px; }
.nf-code { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .26em; color: var(--amber-text); }
.nf-title { font-size: clamp(1.8rem, 5vw, 2.6rem); font-weight: 800; font-stretch: 110%; }
.nf-sub { color: var(--text-muted); max-width: 44ch; }

.section-legal .legal-body { max-width: 66ch; margin-top: 30px; display: grid; gap: 16px; }
.section-legal .legal-body p { color: var(--text-muted); }
.section-legal .legal-body a { color: var(--amber-text); border-bottom: 1px solid var(--amber); }

/* ---------- reveal on scroll ---------- */

html.js .reveal {
  opacity: 0; transform: translateY(16px);
  transition: opacity .7s ease, transform .7s ease;
  transition-delay: calc(var(--d, 0) * 80ms);
}
html.js .reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html.js .reveal { opacity: 1; transform: none; transition: none; }
  html.js .card-lines li { opacity: 1; transform: none; transition: none; }
  .card-cursor { animation: none; }
  .ticker-track { animation: none; }
  * { transition-duration: .01s !important; }
}

/* frozen variant (?static=1): everything visible, nothing moving */
html.static { scroll-behavior: auto; }
html.static * { animation: none !important; transition: none !important; }
html.static.js .reveal, html.static.js .card-lines li { opacity: 1; transform: none; }

/* ---------- responsive ---------- */

@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-card { max-width: 460px; width: 100%; }
  .thesis-grid, .arch-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .arch-layer { grid-template-columns: 46px 110px 1fr; }
  .al-detail { grid-column: 2 / -1; text-align: left; }
  .foundation-seal { position: static; transform: rotate(-8deg); margin-bottom: 10px; }
  .ghost-num { font-size: clamp(6rem, 14vw, 9rem); top: 18px; }
}

@media (max-width: 1240px) {
  .nav-menu a i { display: none; }
  .nav-menu { gap: clamp(12px, 1.6vw, 20px); }
}

@media (max-width: 1010px) {
  .nav-toggle {
    display: inline-flex; align-items: center;
    border: 1px solid var(--hairline-strong); border-radius: var(--radius);
    padding: 8px 14px;
    font-family: var(--font-mono); font-size: .68rem; letter-spacing: .18em;
    color: var(--text);
  }
  .nav-menu {
    position: absolute; top: calc(100% + 1px); right: 0; left: 0;
    display: none;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--hairline);
    padding: 8px clamp(20px, 5vw, 48px) 16px;
  }
  .nav-menu.is-open { display: flex; }
  .nav-menu a { padding: 12px 2px; font-size: .8rem; }
  .nav-theme { margin-top: 10px; }
  .site-nav { position: static; }
  .site-header { position: sticky; }
  .header-inner { position: relative; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .steps, .offer-items, .principle-grid, .forge-items { grid-template-columns: 1fr; }
  .al-detail { display: none; }
  .arch-layer { grid-template-columns: 40px 1fr; }
  .al-name { grid-column: 2; }
  .al-desc { grid-column: 2; }
  .product-head { flex-direction: column; gap: 6px; }
  .product-bullets { flex-direction: column; gap: 8px; }
  .footer-grid { grid-template-columns: 1fr; padding-block: 40px 28px; }
  .hero { padding-block: 48px 56px; }
  .contact-panel { padding: 26px 22px; }
  .exhibit::before, .exhibit::after { display: none; }
  .ghost-num { display: none; }
  .exhibit-kicker { letter-spacing: .14em; }
  .term-panel { min-height: 250px; }
}