/* =========================================================
   Zaiphr Homepage — "The Practice" redesign
   ========================================================= */

:root {
  --accent: var(--za-accent);
  --accent-600: var(--za-accent-600);
  --accent-300: var(--za-accent-300);
  --accent-100: var(--za-accent-100);
  --bg: #0a0d15;            /* slightly deeper than design-system dark, for cinematic feel */
  --bg-raise: #0f1420;
  --ink: #f0f4f8;
  --ink-2: #cbd5e0;
  --ink-3: #8b97ad;
  --ink-4: #5a6478;
  --line: rgba(255,255,255,0.08);
  --line-2: rgba(255,255,255,0.04);
  --line-accent: rgba(249,115,22,0.35);
  --glow: rgba(249,115,22,0.18);

  --container: 1280px;
  --gutter: clamp(20px, 4vw, 48px);

  --display: 'Orbitron', 'Jost', sans-serif;
  --body: 'Jost', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular, Menlo, monospace;

  --density: 1;   /* tweakable 0.85–1.2 */
  --motion: 1;    /* tweakable 0..1 */
}

@media (prefers-reduced-motion: reduce) {
  :root { --motion: 0; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); }
body {
  font-family: var(--body);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* =========================================================
   Ambient canvas — cinematic background
   ========================================================= */
.ambient {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 80% 60% at 15% 0%, rgba(249,115,22,0.08), transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 20%, rgba(84,119,146,0.09), transparent 60%),
    radial-gradient(ellipse 50% 40% at 50% 100%, rgba(249,115,22,0.05), transparent 60%),
    var(--bg);
}
.ambient::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    radial-gradient(1px 1px at 12% 22%, rgba(255,255,255,0.45), transparent),
    radial-gradient(1px 1px at 27% 48%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1.2px 1.2px at 58% 32%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 76% 62%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 88% 14%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1.2px 1.2px at 42% 78%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1px 1px at 15% 85%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 68% 88%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1.2px 1.2px at 92% 70%, rgba(255,255,255,0.45), transparent);
  background-size: 900px 900px;
  animation: driftStars 240s linear infinite;
  opacity: calc(0.5 + 0.5 * var(--motion));
}
.ambient::after {
  /* subtle vignette */
  content:''; position:absolute; inset:0;
  background: radial-gradient(ellipse 100% 80% at 50% 50%, transparent 50%, rgba(0,0,0,0.55) 100%);
}
@keyframes driftStars { to { background-position: -900px 900px; } }

main { position: relative; z-index: 1; }

/* =========================================================
   Header — restrained, monospace mark
   ========================================================= */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  height: 72px;
  display: flex; align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 320ms ease, border-color 320ms ease, backdrop-filter 320ms ease;
}
.nav.scrolled {
  background: rgba(10,13,21,0.72);
  backdrop-filter: blur(14px) saturate(180%);
  -webkit-backdrop-filter: blur(14px) saturate(180%);
  border-bottom-color: var(--line);
}
.nav .container {
  width: 100%;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 32px;
}
.brand {
  display: inline-flex; align-items: center;
  color: var(--ink);
}
.brand__logo {
  display: block;
  height: 28px;
  width: auto;
}

.nav__links {
  display: flex; align-items: center; gap: 22px;
  justify-self: center;
  white-space: nowrap;
}
.nav__link {
  position: relative;
  font-size: 13px; font-weight: 500; color: var(--ink-2);
  letter-spacing: 0.02em;
  padding: 4px 0;
  transition: color 240ms ease;
}
.nav__link:hover { color: var(--ink); }
.nav__link.active { color: var(--ink); }
.nav__link::after {
  content:''; position:absolute; left: 0; right: 0; bottom: -2px;
  height: 1px; background: var(--accent);
  transform: scaleX(0); transform-origin: center;
  transition: transform 280ms cubic-bezier(.2,.8,.2,1);
}
.nav__link:hover::after, .nav__link.active::after { transform: scaleX(1); }

.nav__cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px 9px 18px;
  font-family: var(--body); font-size: 12px; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink); background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: background 240ms ease, border-color 240ms ease, color 240ms ease;
}
.nav__cta:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.nav__cta .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 10px var(--accent);
}
.nav__cta:hover .dot { background: #fff; box-shadow: 0 0 10px #fff; }

.nav__status {
  font-family: var(--mono); font-size: 11px;
  color: var(--ink-3); letter-spacing: 0.04em;
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(255,255,255,0.02);
}
.nav__status .live {
  width: 6px; height: 6px; border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 8px #4ade80;
  animation: livePulse 2.4s ease-in-out infinite;
}
@keyframes livePulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

/* =========================================================
   Hero — editorial, asymmetric, cinematic
   ========================================================= */
.hero {
  position: relative;
  min-height: 100vh;
  padding: 100px 0 80px;
  display: flex;
  align-items: center;
  overflow: clip;
}

/* massive background wordmark, clipped */
.hero__bgtype {
  position: absolute;
  left: -2vw; right: -2vw;
  top: 52%;
  transform: translateY(-50%);
  pointer-events: none;
  z-index: 0;
  font-family: var(--display); font-weight: 900;
  font-size: clamp(200px, 32vw, 520px);
  line-height: 0.82;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255,255,255,0.06);
  text-align: center;
  white-space: nowrap;
  user-select: none;
}

/* animated grid floor */
.hero__grid {
  position: absolute;
  left: -30%; right: -30%;
  bottom: -45%;
  height: 90%;
  background-image:
    linear-gradient(rgba(249,115,22,0.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(249,115,22,0.22) 1px, transparent 1px);
  background-size: 72px 72px;
  transform: perspective(900px) rotateX(62deg);
  transform-origin: center top;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, black 30%, transparent 80%);
  opacity: calc(0.7 * var(--motion) + 0.3);
  animation: gridDrift 14s linear infinite;
  pointer-events: none;
  z-index: 0;
}
@keyframes gridDrift { to { background-position: 0 72px; } }

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr;
  gap: 25px;
}

.hero__preamble {
  display: flex; align-items: center; gap: 16px;
  font-family: var(--mono); font-size: 11px;
  color: var(--ink-3); letter-spacing: 0.08em;
  text-transform: uppercase;
}
.hero__preamble .bar { width: 28px; height: 1px; background: var(--accent); }
.hero__preamble .sep { color: var(--ink-4); }
.hero__preamble .blip {
  display: inline-flex; align-items: center; gap: 6px;
}
.hero__preamble .blip::before {
  content:''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 10px var(--accent);
  animation: blipPulse 1.8s ease-in-out infinite;
}
@keyframes blipPulse { 0%,100% { opacity:1; transform: scale(1); } 50% { opacity: 0.3; transform: scale(0.8); } }

.hero__headline {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(48px, 9vw, 148px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin: 0;
  color: var(--ink);
  max-width: 14ch;
}
.hero__headline .em {
  font-style: italic;
  font-family: 'Jost', serif;
  font-weight: 300;
  letter-spacing: -0.01em;
  background: linear-gradient(100deg, var(--accent-100), var(--accent));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  display: inline-block;
}
.hero__headline .line2 { display: block; }
.hero__headline .line3 {
  display: block;
  color: var(--ink-3);
  font-weight: 400;
}

.hero__sub-row {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 64px;
  align-items: end;
  margin-top: 16px;
}

.hero__lede {
  font-family: var(--body);
  font-size: clamp(17px, 1.4vw, 20px);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 46ch;
  margin: 0;
}
.hero__lede strong {
  color: var(--ink);
  font-weight: 500;
}

.hero__cta-col {
  display: flex; flex-direction: column; gap: 20px;
  align-items: flex-start;
}
.hero__cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-family: var(--body); font-size: 13px; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 240ms cubic-bezier(.2,.8,.2,1), box-shadow 240ms ease, background 240ms ease, color 240ms ease, border-color 240ms ease;
  position: relative;
}
.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 0 0 rgba(249,115,22,0);
}
.btn--primary:hover {
  transform: translateY(-2px);
  background: var(--accent-300);
  box-shadow: 0 14px 34px rgba(249,115,22,0.45), 0 0 0 1px rgba(249,115,22,0.4);
}
.btn--ghost {
  background: transparent; color: var(--ink);
  border-color: var(--line);
}
.btn--ghost:hover { border-color: var(--ink-3); transform: translateY(-2px); }
.btn .arrow {
  width: 20px; height: 1px; background: currentColor; position: relative;
  transition: width 240ms ease;
}
.btn .arrow::after {
  content:''; position:absolute; right: 0; top: -3px; width: 7px; height: 7px;
  border-top: 1px solid currentColor; border-right: 1px solid currentColor;
  transform: rotate(45deg);
}
.btn:hover .arrow { width: 28px; }

.hero__trust {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 20px 28px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  max-width: 520px;
}
.hero__trust-item {
  display: flex; flex-direction: column; gap: 2px;
}
.hero__trust-item .val {
  font-family: var(--display); font-weight: 700;
  font-size: 15px; letter-spacing: 0.02em;
  color: var(--ink);
}
.hero__trust-item .lbl {
  font-size: 11px; color: var(--ink-3);
  letter-spacing: 0.08em; text-transform: uppercase;
}

/* Hero terminal — the "live" agent feed */
.hero__feed {
  position: relative;
  border: 1px solid var(--line);
  background: rgba(15,20,32, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 14px;
  padding: 18px 20px 16px;
  font-family: var(--mono); font-size: 12px;
  color: var(--ink-2);
  max-width: 520px;
  overflow: hidden;
}
.hero__feed::before {
  content:''; position:absolute; inset: 0; pointer-events:none;
  background: linear-gradient(180deg, transparent 40%, rgba(10,13,21,0.9) 100%);
}
.hero__feed .feed-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 10px; padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink-3);
}
.hero__feed .dots { display: flex; gap: 5px; }
.hero__feed .dots span { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,0.15); }
.hero__feed .dots span:first-child { background: rgba(249,115,22,0.5); }
.hero__feed .feed-lines {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 6px;
  position: relative;
}
.hero__feed .feed-lines li {
  display: flex; gap: 10px; align-items: baseline;
  line-height: 1.5;
}
.hero__feed .feed-lines .t { color: var(--ink-4); font-variant-numeric: tabular-nums; }
.hero__feed .feed-lines .a { color: var(--accent-100); font-weight: 500; }
.hero__feed .feed-lines .m { color: var(--ink-2); }
.hero__feed .feed-lines .ok { color: #4ade80; }

/* scroll hint */
.hero__scroll {
  position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: var(--ink-3); font-family: var(--mono); font-size: 10px;
  letter-spacing: 0.18em; text-transform: uppercase;
  z-index: 2;
}
.hero__scroll .line {
  width: 1px; height: 44px;
  background: linear-gradient(180deg, transparent, var(--accent));
  animation: scrollPulse 2.4s ease-in-out infinite;
}
@keyframes scrollPulse {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* =========================================================
   Section — generic
   ========================================================= */
section { position: relative; padding: calc(120px * var(--density)) 0; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.18em; text-transform: uppercase;
  margin-bottom: 24px;
}
.eyebrow::before {
  content: ''; width: 20px; height: 1px; background: var(--accent);
}
.eyebrow .idx {
  color: var(--ink-3);
  letter-spacing: 0.1em;
}

.section-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(36px, 5.6vw, 84px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0 0 24px;
  max-width: 16ch;
}
.section-title .em {
  font-family: 'Jost', serif;
  font-style: italic;
  font-weight: 300;
  color: var(--accent);
}
.section-title .muted { color: var(--ink-3); font-weight: 400; }
.section-lede {
  font-size: clamp(16px, 1.3vw, 19px);
  line-height: 1.6;
  color: var(--ink-2);
  max-width: 52ch;
  margin: 0;
}

.section-head {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: end;
  margin-bottom: 64px;
}
@media (max-width: 900px) {
  .section-head { grid-template-columns: 1fr; gap: 24px; }
}

/* =========================================================
   Marquee proof strip
   ========================================================= */
.proof {
  padding: 44px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  position: relative;
  background: rgba(255,255,255,0.015);
}
.proof::before, .proof::after {
  content:''; position:absolute; top: 0; bottom: 0; width: 120px; z-index: 2;
  pointer-events: none;
}
.proof::before { left: 0; background: linear-gradient(90deg, var(--bg) 0%, transparent 100%); }
.proof::after  { right: 0; background: linear-gradient(-90deg, var(--bg) 0%, transparent 100%); }

.marquee { display: flex; width: max-content; animation: marq 60s linear infinite; }
.marquee:hover { animation-play-state: paused; }
.marquee__group {
  display: flex; align-items: center; gap: 64px;
  padding: 0 32px;
}
.marquee__item {
  display: inline-flex; align-items: center; gap: 14px;
  white-space: nowrap;
}
.marquee__val {
  font-family: var(--display); font-weight: 800;
  font-size: 28px; letter-spacing: -0.01em;
  color: var(--ink);
}
.marquee__val em {
  font-style: normal; color: var(--accent);
}
.marquee__lbl {
  font-family: var(--mono); font-size: 11px;
  color: var(--ink-3); letter-spacing: 0.08em;
  text-transform: uppercase;
  max-width: 18ch; line-height: 1.4;
  white-space: normal;
}
.marquee__dot { width: 4px; height: 4px; border-radius: 50%; background: var(--accent); }

@keyframes marq {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* =========================================================
   Services — "Operations"
   ========================================================= */
.ops { padding: calc(140px * var(--density)) 0; }
.ops__list {
  display: flex; flex-direction: column;
  border-top: 1px solid var(--line);
}

.op {
  display: grid;
  grid-template-columns: 80px 1fr 1.1fr;
  gap: 48px;
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
  transition: background 320ms ease;
}
.op:hover { background: rgba(249,115,22,0.018); }

.op__idx {
  font-family: var(--mono); font-size: 12px;
  color: var(--ink-3); letter-spacing: 0.14em;
  padding-top: 8px;
}
.op__idx .n { display: block; color: var(--accent); font-size: 14px; margin-bottom: 6px; }

.op__title-col {}
.op__title {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(26px, 3vw, 40px); line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 16px;
  max-width: 12ch;
}
.op__title .em {
  font-family: 'Jost', serif; font-style: italic; font-weight: 300;
  color: var(--accent);
}
.op__desc {
  font-size: 15px; color: var(--ink-2); line-height: 1.7; margin: 0 0 20px;
  max-width: 42ch;
}
.op__tags {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-top: 12px;
}
.op__tag {
  font-family: var(--mono); font-size: 11px;
  color: var(--ink-3); letter-spacing: 0.06em;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
}

.op__demo {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(145deg, rgba(31,42,66,0.5), rgba(15,20,31,0.6));
  padding: 20px;
  min-height: 220px;
  font-family: var(--mono); font-size: 12px;
  color: var(--ink-2);
  position: relative; overflow: hidden;
}
.op__demo-head {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3);
  margin-bottom: 14px; padding-bottom: 12px; border-bottom: 1px solid var(--line);
}

/* Demo 1 — readiness scoring */
.demo-ready { display: grid; grid-template-columns: 1fr; gap: 10px; }
.ready-row {
  display: grid; grid-template-columns: 1fr 60px 80px; gap: 12px; align-items: center;
  font-size: 12px;
}
.ready-row .lbl { color: var(--ink-2); }
.ready-row .bar {
  height: 4px; background: rgba(255,255,255,0.08); border-radius: 999px; overflow: hidden;
}
.ready-row .bar span {
  display: block; height: 100%;
  background: linear-gradient(90deg, var(--accent-100), var(--accent));
  border-radius: 999px;
  transform-origin: left; transform: scaleX(0);
  transition: transform 1.2s cubic-bezier(.2,.8,.2,1);
}
.op.in-view .ready-row .bar span { transform: scaleX(var(--w, 0.5)); }
.ready-row .val { text-align: right; color: var(--accent-100); font-weight: 600; font-variant-numeric: tabular-nums; }

/* Demo 2 — curriculum chips */
.demo-curric { display: flex; flex-wrap: wrap; gap: 8px; align-content: flex-start; }
.curric-chip {
  font-family: var(--body); font-size: 12px; font-weight: 500;
  padding: 8px 14px; border-radius: 8px;
  background: rgba(255,255,255,0.03); border: 1px solid var(--line);
  color: var(--ink-2);
  display: inline-flex; align-items: center; gap: 8px;
  transition: background 200ms ease, border-color 200ms ease, color 200ms ease;
}
.curric-chip:hover { background: rgba(249,115,22,0.1); border-color: var(--line-accent); color: var(--ink); }
.curric-chip .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }

/* Demo 3 — build blueprint */
.demo-build {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; align-items: stretch;
  font-family: var(--mono); font-size: 11px;
}
.bb-node {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: rgba(255,255,255,0.015);
  display: flex; flex-direction: column; gap: 6px;
  position: relative;
}
.bb-node.primary { background: rgba(249,115,22,0.08); border-color: var(--line-accent); }
.bb-node .k { color: var(--ink-3); font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase; }
.bb-node .v { color: var(--ink); font-weight: 600; font-size: 12px; line-height: 1.3; }

.bb-flow { display: grid; grid-template-columns: 1fr; gap: 8px; grid-column: span 3; margin-top: 4px; }
.bb-line {
  display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 8px; align-items: center;
}
.bb-link {
  height: 1px; background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

/* =========================================================
   Agents — "The team you can't see"
   ========================================================= */
.agents {
  position: relative;
  padding: calc(160px * var(--density)) 0 calc(140px * var(--density));
  overflow: hidden;
}
.agents__typo {
  position: absolute; left: 0; right: 0; top: 50%;
  transform: translateY(-50%);
  font-family: var(--display); font-weight: 900;
  font-size: clamp(180px, 28vw, 440px);
  line-height: 0.82; letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255,255,255,0.04);
  text-align: center; white-space: nowrap;
  pointer-events: none; z-index: 0;
}
.agents .container { position: relative; z-index: 1; }

.agents__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 20px;
  margin-top: 24px;
}
.agent {
  position: relative;
  border: 1px solid var(--line);
  background: rgba(15,20,32, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 14px;
  padding: 20px;
  overflow: hidden;
  transition: transform 320ms cubic-bezier(.2,.8,.2,1), border-color 320ms ease, background 320ms ease;
}
.agent:hover {
  transform: translateY(-4px);
  border-color: var(--line-accent);
  background: rgba(249,115,22,0.05);
}
.agent__top {
  display: flex; align-items: flex-start; justify-content: space-between;
  margin-bottom: 18px;
}
.agent__avatar {
  width: 56px; height: 56px; border-radius: 12px;
  overflow: hidden;
  background: linear-gradient(145deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  border: 1px solid var(--line);
  position: relative;
}
.agent__avatar img { width: 100%; height: 100%; object-fit: cover; filter: saturate(0.85) contrast(1.05); }
.agent__avatar::after {
  content:''; position:absolute; inset:0;
  background: linear-gradient(180deg, transparent 50%, rgba(10,13,21,0.6) 100%);
}
.agent__status {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 10px;
  color: #4ade80; letter-spacing: 0.1em; text-transform: uppercase;
}
.agent__status .d { width: 6px; height: 6px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 8px #4ade80; animation: livePulse 2.4s ease-in-out infinite; }
.agent__status.idle { color: var(--ink-3); }
.agent__status.idle .d { background: var(--ink-3); box-shadow: none; animation: none; }

.agent__name {
  font-family: var(--display); font-weight: 700;
  font-size: 22px; letter-spacing: -0.01em;
  color: var(--ink); margin: 0 0 4px;
}
.agent__role {
  font-family: var(--mono); font-size: 11px;
  color: var(--ink-3); letter-spacing: 0.08em; text-transform: uppercase;
  margin: 0 0 14px;
}
.agent__task {
  font-size: 13px; color: var(--ink-2); line-height: 1.55;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,0.015);
  margin-bottom: 12px;
  font-family: var(--mono);
}
.agent__task .k { color: var(--ink-3); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; display: block; margin-bottom: 4px; }
.agent__meta {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--mono); font-size: 10px;
  color: var(--ink-3); letter-spacing: 0.1em; text-transform: uppercase;
}
.agent__meta .ticks { display: flex; gap: 3px; }
.agent__meta .ticks span {
  width: 6px; height: 12px; border-radius: 1px;
  background: var(--ink-4);
}
.agent__meta .ticks span.on { background: var(--accent); box-shadow: 0 0 6px rgba(249,115,22,0.5); }

/* =========================================================
   Engagement / timeline
   ========================================================= */
.timeline {
  padding: calc(140px * var(--density)) 0;
  border-top: 1px solid var(--line);
}
.timeline__track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 48px;
  border-top: 1px solid var(--line);
}
.timeline__track::after {
  content:''; position:absolute; left: 0; right: 0; top: -1px;
  height: 2px; background: linear-gradient(90deg, var(--accent) 0%, var(--accent) var(--progress, 50%), transparent var(--progress, 50%));
  box-shadow: 0 0 20px rgba(249,115,22,0.4);
}
.tl-step {
  padding: 32px 20px 0;
  border-right: 1px solid var(--line);
  position: relative;
}
.tl-step:last-child { border-right: none; }
.tl-step::before {
  content:''; position:absolute; top: -6px; left: 20px;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--ink-4);
  transition: border-color 320ms ease, background 320ms ease;
}
.tl-step.active::before {
  border-color: var(--accent); background: var(--accent);
  box-shadow: 0 0 14px rgba(249,115,22,0.6);
}
.tl-step__week {
  font-family: var(--mono); font-size: 11px;
  color: var(--ink-3); letter-spacing: 0.14em; text-transform: uppercase;
  margin-bottom: 8px;
}
.tl-step.active .tl-step__week { color: var(--accent); }
.tl-step__title {
  font-family: var(--display); font-weight: 700;
  font-size: 22px; letter-spacing: -0.01em;
  color: var(--ink); margin: 0 0 10px;
}
.tl-step__body {
  font-size: 13px; color: var(--ink-2); line-height: 1.6; margin: 0 0 14px;
}
.tl-step__deliverable {
  display: flex; align-items: baseline; gap: 8px;
  font-family: var(--mono); font-size: 11px;
  color: var(--ink-3); letter-spacing: 0.04em;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}
.tl-step__deliverable .k { color: var(--accent); }

/* =========================================================
   About / Manifesto
   ========================================================= */
.about {
  padding: calc(160px * var(--density)) 0;
  position: relative;
}
.about__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: start;
}
.about__quote {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(28px, 3.4vw, 48px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0 0 32px;
  max-width: 20ch;
}
.about__quote .em {
  font-family: 'Jost', serif; font-style: italic; font-weight: 300;
  color: var(--accent);
}
.about__body { display: flex; flex-direction: column; gap: 20px; }
.about__body p { color: var(--ink-2); font-size: 15px; line-height: 1.75; margin: 0; max-width: 48ch; }

.about__attribution {
  display: flex; align-items: center; gap: 14px;
  padding-top: 28px; margin-top: 16px;
  border-top: 1px solid var(--line);
}
.about__attribution .who {
  font-family: var(--display); font-weight: 700;
  font-size: 14px; letter-spacing: 0.02em;
  color: var(--ink);
}
.about__attribution .what {
  font-family: var(--mono); font-size: 11px;
  color: var(--ink-3); letter-spacing: 0.1em; text-transform: uppercase;
  margin-top: 2px;
}
.about__mark {
  width: 44px; height: 44px; border-radius: 10px;
  background: url('../assets/zaiphr-mark-500.png') center/contain no-repeat;
}

.about__panel {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(145deg, rgba(31,42,66,0.5), rgba(15,20,31,0.6));
  padding: 28px;
  position: relative;
  overflow: hidden;
}
.about__panel::before {
  content:''; position:absolute; top: -60%; right: -30%; width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(249,115,22,0.2), transparent 60%);
  filter: blur(40px);
}
.about__panel > * { position: relative; }
.about__panel-head {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 22px; padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.about__panel-head .lbl { font-family: var(--mono); font-size: 10px; color: var(--ink-3); letter-spacing: 0.14em; text-transform: uppercase; }
.about__panel-head .title { font-family: var(--display); font-weight: 700; font-size: 17px; color: var(--ink); margin-top: 4px; }
.about__panel .metric {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.about__panel .metric:last-child { border-bottom: none; }
.about__panel .metric .k { font-size: 13px; color: var(--ink-2); }
.about__panel .metric .v {
  font-family: var(--display); font-weight: 700;
  font-size: 17px;
  color: var(--ink);
}
.about__panel .metric .v em {
  font-style: normal; color: var(--accent);
}
.about__panel .metric .bar {
  width: 100px; height: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: 999px; overflow: hidden;
}
.about__panel .metric .bar span {
  display: block; height: 100%;
  background: linear-gradient(90deg, var(--accent-100), var(--accent));
  border-radius: 999px;
}

/* =========================================================
   Final CTA — quiet
   ========================================================= */
.final {
  padding: calc(180px * var(--density)) 0 calc(140px * var(--density));
  text-align: center;
  position: relative;
  overflow: hidden;
}
.final::before {
  content:''; position:absolute; left: 50%; top: 50%;
  width: min(900px, 90vw); height: min(900px, 90vw);
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(249,115,22,0.12), transparent 55%);
  pointer-events: none;
  filter: blur(10px);
}
.final__kicker {
  font-family: var(--mono); font-size: 11px;
  color: var(--accent); letter-spacing: 0.3em; text-transform: uppercase;
  margin-bottom: 28px;
  display: inline-flex; align-items: center; gap: 12px;
}
.final__kicker::before, .final__kicker::after {
  content:''; width: 28px; height: 1px; background: var(--accent);
}
.final__title {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(48px, 9vw, 140px);
  line-height: 0.95; letter-spacing: -0.03em;
  color: var(--ink);
  margin: 0 auto 32px;
  max-width: 14ch;
  position: relative;
}
.final__title .em {
  font-family: 'Jost', serif; font-style: italic; font-weight: 300;
  color: var(--accent);
}
.final__sub {
  font-size: clamp(16px, 1.2vw, 18px);
  color: var(--ink-2);
  max-width: 50ch;
  margin: 0 auto 40px;
  line-height: 1.6;
}
.final__cta-row {
  display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
  position: relative;
}
.final__meta {
  margin-top: 56px;
  display: flex; justify-content: center; gap: 32px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 11px;
  color: var(--ink-3); letter-spacing: 0.1em; text-transform: uppercase;
  position: relative;
}
.final__meta span { display: inline-flex; align-items: center; gap: 8px; }
.final__meta span::before { content:''; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

/* =========================================================
   Footer
   ========================================================= */
.foot {
  padding: 80px 0 40px;
  border-top: 1px solid var(--line);
  background: rgba(0,0,0,0.3);
  position: relative;
  z-index: 1;
}
.foot__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 56px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line);
}
.foot__brand { max-width: 38ch; }
.foot__logo {
  display: block;
  height: 36px;
  width: auto;
  margin-bottom: 18px;
}
.foot__brand p { color: var(--ink-2); font-size: 14px; line-height: 1.7; margin: 0; }
.foot__col h4 {
  font-family: var(--mono); font-size: 11px; color: var(--accent);
  letter-spacing: 0.14em; text-transform: uppercase; font-weight: 700;
  margin: 0 0 18px;
}
.foot__col a {
  display: block; color: var(--ink-2); font-size: 14px;
  padding: 5px 0; transition: color 200ms ease; cursor: pointer;
}
.foot__col a:hover { color: var(--accent); }
.foot__bottom {
  padding-top: 28px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 14px;
  font-family: var(--mono); font-size: 11px;
  color: var(--ink-4); letter-spacing: 0.1em; text-transform: uppercase;
}
.foot__bottom .dot { color: var(--accent); }

/* =========================================================
   Tweaks panel
   ========================================================= */
#tweaks-root {
  position: fixed; right: 20px; bottom: 20px; z-index: 500;
  font-family: var(--body);
  display: none;
}
body.tweaks-on #tweaks-root { display: block; }
.tw {
  width: 280px;
  background: rgba(15,20,32,0.9);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}
.tw__title {
  font-family: var(--display); font-weight: 700;
  font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink); margin: 0 0 14px;
  display: flex; justify-content: space-between; align-items: center;
}
.tw__title .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); animation: livePulse 2.4s ease-in-out infinite; }
.tw__group { margin-bottom: 14px; }
.tw__group:last-child { margin-bottom: 0; }
.tw__label {
  font-family: var(--mono); font-size: 10px;
  color: var(--ink-3); letter-spacing: 0.1em; text-transform: uppercase;
  margin-bottom: 8px;
}
.tw__row { display: flex; gap: 6px; flex-wrap: wrap; }
.tw__btn {
  flex: 1 1 auto;
  padding: 8px 10px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--body); font-size: 12px; font-weight: 500;
  color: var(--ink-2); cursor: pointer;
  transition: all 200ms ease;
}
.tw__btn:hover { background: rgba(249,115,22,0.1); color: var(--ink); }
.tw__btn.active {
  background: var(--accent); border-color: var(--accent); color: #fff;
}
.tw__swatch {
  width: 28px; height: 28px; border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer; padding: 0; flex: 0 0 auto;
  transition: transform 180ms ease;
}
.tw__swatch:hover { transform: scale(1.1); }
.tw__swatch.active { border-color: var(--ink); }
.tw__slider {
  width: 100%;
  -webkit-appearance: none; appearance: none;
  height: 4px; border-radius: 999px; background: rgba(255,255,255,0.1);
  outline: none;
}
.tw__slider::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(249,115,22,0.5);
}
.tw__slider::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent);
  cursor: pointer; border: none;
}

/* =========================================================
   Reveal utility
   ========================================================= */
.reveal {
  opacity: 0; transform: translateY(24px);
  transition: opacity 700ms cubic-bezier(.2,.8,.2,1), transform 700ms cubic-bezier(.2,.8,.2,1);
}
.reveal.in {
  opacity: 1; transform: translateY(0);
}
.reveal.d1 { transition-delay: 120ms; }
.reveal.d2 { transition-delay: 240ms; }
.reveal.d3 { transition-delay: 360ms; }
.reveal.d4 { transition-delay: 480ms; }

/* =========================================================
   Hero variant B — "Terminal-only"
   ========================================================= */
body[data-hero="b"] .hero__grid { opacity: calc(0.3 * var(--motion)); }
body[data-hero="b"] .hero__headline { font-size: clamp(44px, 7vw, 120px); }

/* Hero variant C — "Agent roll call" */
body[data-hero="c"] .hero__bgtype { font-size: clamp(160px, 22vw, 360px); }
body[data-hero="c"] .hero__headline { max-width: 20ch; }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1024px) {
  .op { grid-template-columns: 48px 1fr; }
  .op__demo { grid-column: 1 / -1; margin-top: 20px; }
  .agents__grid { grid-template-columns: repeat(2, 1fr); }
  .timeline__track { grid-template-columns: repeat(2, 1fr); }
  .tl-step { border-right: none; border-bottom: 1px solid var(--line); }
  .about__grid { grid-template-columns: 1fr; gap: 48px; }
  .foot__grid { grid-template-columns: 1fr 1fr; }
  .hero__sub-row { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 1180px) {
  .nav__status { display: none; }
}
@media (max-width: 1020px) {
  .nav__links { gap: 16px; }
  .nav__link { font-size: 12px; }
}
@media (max-width: 880px) {
  .nav__links { display: none; }
  .nav .container { grid-template-columns: auto 1fr; }
}
@media (max-width: 640px) {
  .agents__grid { grid-template-columns: 1fr; }
  .hero__trust { grid-template-columns: 1fr 1fr; }
  .foot__grid { grid-template-columns: 1fr; }
  .final__meta { flex-direction: column; gap: 12px; }
  #tweaks-root .tw { width: 240px; }
}