/* ============================================================
   flow — Athema landing variant
   deep-ink cinematic · one signal accent · motion carries the page
   ============================================================ */

@font-face { font-family: 'Geist'; src: url('../fonts/geist-sans-latin-400-normal.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'Geist'; src: url('../fonts/geist-sans-latin-500-normal.woff2') format('woff2'); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: 'Geist'; src: url('../fonts/geist-sans-latin-600-normal.woff2') format('woff2'); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: 'Geist Mono'; src: url('../fonts/geist-mono-latin-400-normal.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'Geist Mono'; src: url('../fonts/geist-mono-latin-500-normal.woff2') format('woff2'); font-weight: 500; font-style: normal; font-display: swap; }

:root {
  --bg: #08090C;
  --bg-2: #0B0D12;
  --panel: #0E1117;
  --line: rgba(226, 236, 255, 0.08);
  --line-strong: rgba(226, 236, 255, 0.15);
  --text: #EFF2F7;
  --sub: #9AA3B2;
  --dim: #5B6473;
  --signal: #6FDCFF;
  --signal-deep: #38B6E0;
  --signal-dim: rgba(111, 220, 255, 0.13);
  --ok: #58D9A4;
  --radius: 16px;
  --font: 'Geist', system-ui, -apple-system, sans-serif;
  --mono: 'Geist Mono', ui-monospace, 'SF Mono', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
html, body { background: var(--bg); }
body {
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}
::selection { background: rgba(111, 220, 255, 0.28); color: #fff; }
a { color: inherit; }
img, video, svg { display: block; max-width: 100%; }
button { font-family: inherit; }

.mono { font-family: var(--mono); }
.wrap { max-width: 1140px; margin: 0 auto; padding: 0 28px; }

/* ---------- kickers & headings ---------- */
.kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--dim);
  display: flex; align-items: center; gap: 12px;
}
.kicker::before { content: ''; width: 22px; height: 1px; background: var(--signal); opacity: 0.7; }
.kicker.center { justify-content: center; }
.kicker.center::after { content: ''; width: 22px; height: 1px; background: var(--signal); opacity: 0.7; }

h1, h2 { font-weight: 600; letter-spacing: -0.032em; line-height: 1.03; text-wrap: balance; }
.sub-line { color: var(--sub); font-size: 17.5px; line-height: 1.65; }
.sub-line strong { color: var(--text); font-weight: 500; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 14.5px; font-weight: 600; letter-spacing: -0.005em;
  border-radius: 11px; padding: 13px 22px;
  text-decoration: none; cursor: pointer; border: 1px solid transparent;
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1), background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.btn-solid {
  background: var(--text); color: #0A0C10;
  box-shadow: 0 18px 44px -18px rgba(226, 236, 255, 0.35);
}
.btn-solid:hover { transform: translateY(-1px); background: #fff; box-shadow: 0 22px 52px -18px rgba(111, 220, 255, 0.4); }
.btn-ghost {
  background: rgba(226, 236, 255, 0.02); color: var(--sub);
  border-color: var(--line-strong);
}
.btn-ghost:hover { color: var(--text); border-color: rgba(226, 236, 255, 0.3); transform: translateY(-1px); }

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background 0.4s ease, border-color 0.4s ease, backdrop-filter 0.4s ease;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(8, 9, 12, 0.72);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.nav-inner {
  max-width: 1240px; margin: 0 auto; padding: 0 28px;
  height: 64px; display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand svg { transition: filter 0.3s ease; }
.brand:hover svg { filter: drop-shadow(0 0 8px rgba(111, 220, 255, 0.6)); }
.brand .name { font-size: 15.5px; font-weight: 600; letter-spacing: 0.01em; }
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a { font-size: 13.5px; font-weight: 500; color: var(--sub); text-decoration: none; transition: color 0.25s ease; }
.nav-links a:hover { color: var(--text); }
.nav-links .btn { padding: 9px 17px; font-size: 13.5px; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex; flex-direction: column; justify-content: center;
  overflow: hidden;
  padding-top: 76px;
}
.hero-media {
  position: absolute; inset: 0; z-index: 0;
  background: var(--bg) url('../video/hero-poster.jpg') center / cover no-repeat;
}
.hero-media video {
  width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transition: opacity 1.6s ease;
}
.hero-media video.ready { opacity: 1; }
.hero-scrim {
  position: absolute; inset: 0; z-index: 1;
  background:
    linear-gradient(180deg, rgba(8, 9, 12, 0.62) 0%, rgba(8, 9, 12, 0.12) 30%, rgba(8, 9, 12, 0.05) 55%, rgba(8, 9, 12, 0.88) 92%, var(--bg) 100%),
    linear-gradient(100deg, rgba(8, 9, 12, 0.82) 0%, rgba(8, 9, 12, 0.42) 38%, rgba(8, 9, 12, 0) 62%);
}
.hero-content { position: relative; z-index: 2; width: 100%; padding-top: 34px; }
.hero h1 {
  font-size: clamp(42px, 5.7vw, 74px);
  margin: 26px 0 26px;
}
.hero h1 .beat { display: block; }
.hero h1 .beat-2 { color: var(--signal); }
.hero h1 .beat-3 { color: #8B94A4; }
.hero .sub-line { max-width: 47ch; }
.hero-ctas { display: flex; align-items: center; gap: 14px; margin-top: 38px; flex-wrap: wrap; }
.hero-note { margin-top: 18px; font-family: var(--mono); font-size: 11.5px; color: var(--dim); letter-spacing: 0.04em; }

/* source strip along the hero's bottom edge */
.hero-sources {
  position: relative; z-index: 2;
  margin-top: auto;
  padding-top: 26px;
  padding-bottom: 30px;
}
.hero-sources .row {
  display: flex; flex-wrap: wrap; gap: 10px 24px; align-items: center;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--dim);
}
.hero-sources .row .lead { color: var(--sub); }
.hero-sources .src { display: inline-flex; align-items: center; gap: 9px; white-space: nowrap; }
.hero-sources .src i {
  width: 5px; height: 5px; border-radius: 50%; background: var(--signal);
  opacity: 0.85;
  animation: src-blink 3.6s ease-in-out infinite;
  animation-delay: var(--d, 0s);
}
@keyframes src-blink { 0%, 100% { opacity: 0.85; } 50% { opacity: 0.2; } }

/* ============================================================
   SECTIONS (shared)
   ============================================================ */
section { position: relative; }
.section-pad { padding: 150px 0; }
.section-head { max-width: 720px; }
.section-head h2 { font-size: clamp(32px, 4.4vw, 52px); margin: 22px 0 18px; }
.section-head.center { margin: 0 auto; text-align: center; }
.section-head .sub-line { max-width: 52ch; }
.section-head.center .sub-line { margin: 0 auto; }

/* scroll reveal */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1), transform 0.9s cubic-bezier(0.22, 1, 0.36, 1); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.12s; }
.reveal[data-delay="2"] { transition-delay: 0.24s; }
.reveal[data-delay="3"] { transition-delay: 0.36s; }

/* ============================================================
   THE LOOP — animated diagram
   ============================================================ */
.loop-section { background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 50%, var(--bg) 100%); }
.loop-figure { margin-top: 74px; position: relative; }
.loop-svg { width: 100%; height: auto; overflow: visible; }

.loop-svg .lane { stroke: rgba(111, 220, 255, 0.2); stroke-width: 1.3; fill: none; }
.loop-svg .lane-out { stroke: rgba(111, 220, 255, 0.32); }
.loop-svg .src-dot { fill: rgba(111, 220, 255, 0.7); }
.loop-svg .src-label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; fill: #AEB6C4; text-transform: uppercase; }
.loop-svg .stage-label { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em; fill: var(--dim); text-transform: uppercase; }
.loop-svg .stage-tick { fill: var(--bg); stroke: rgba(111, 220, 255, 0.5); stroke-width: 1.2; }
.loop-svg .core-ring { fill: rgba(8, 9, 12, 0.4); stroke: rgba(111, 220, 255, 0.5); stroke-width: 1.2; }
.loop-svg .core-glow { fill: url(#coreGlow); }
.loop-svg .pr-node { fill: rgba(111, 220, 255, 0.1); stroke: var(--signal); stroke-width: 1.3; }
.loop-svg .pr-label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; fill: var(--signal); text-transform: uppercase; }
.loop-svg .zone-label { font-family: var(--mono); font-size: 10px; letter-spacing: 0.2em; fill: #6B7484; text-transform: uppercase; }

/* travelling pulses (SVG circles on CSS offset-path; paused under reduced motion) */
.loop-svg .pulse {
  fill: var(--signal);
  offset-rotate: 0deg;
  animation: travel var(--dur, 5.2s) linear infinite;
  animation-delay: var(--d, 0s);
  opacity: 0;
}
.loop-svg .pulse.bright { filter: drop-shadow(0 0 5px rgba(111, 220, 255, 0.9)); }
@supports not (offset-path: path('M 0 0 L 1 1')) {
  .loop-svg .pulse { display: none; }
}
@keyframes travel {
  0% { offset-distance: 0%; opacity: 0; }
  8% { opacity: 0.95; }
  86% { opacity: 0.95; }
  100% { offset-distance: 100%; opacity: 0; }
}
.loop-caption {
  margin-top: 40px;
  display: flex; justify-content: center;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.05em;
  color: var(--dim); text-align: center;
}

/* the learning return arc */
.loop-svg .lane-learn {
  stroke: rgba(111, 220, 255, 0.16); stroke-width: 1.1; fill: none;
  stroke-dasharray: 3 6; stroke-linecap: round;
}
.loop-svg .learn-label { font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em; fill: var(--dim); text-transform: uppercase; }
.loop-svg .pulse.learn { fill: rgba(111, 220, 255, 0.75); }

/* mobile fallback flow (shown < 760px) */
.loop-mobile { display: none; }

/* ============================================================
   PROOF — product motion panels
   ============================================================ */
.proof-grid { display: flex; flex-direction: column; gap: 120px; margin-top: 90px; }
.panel { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 2.4fr); gap: 56px; align-items: end; }
.panel:nth-child(even) { grid-template-columns: minmax(0, 2.4fr) minmax(0, 5fr); }
.panel:nth-child(even) .panel-copy { order: -1; }

.frame {
  position: relative;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  overflow: hidden;
  background: var(--panel);
  box-shadow:
    0 60px 130px -50px rgba(0, 0, 0, 0.85),
    0 0 0 1px rgba(8, 9, 12, 0.6),
    0 30px 70px -30px rgba(111, 220, 255, 0.07);
}
.frame video { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
.frame .demo-tag {
  position: absolute; top: 12px; right: 12px; z-index: 2;
  font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--dim); background: rgba(8, 9, 12, 0.72);
  border: 1px solid var(--line);
  border-radius: 999px; padding: 4px 10px;
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
}

.panel-copy .num {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.2em; color: var(--signal);
  display: block; margin-bottom: 14px;
}
.panel-copy h3 { font-size: 25px; font-weight: 600; letter-spacing: -0.02em; line-height: 1.15; margin-bottom: 12px; }
.panel-copy p { color: var(--sub); font-size: 15px; line-height: 1.65; max-width: 34ch; }
.panel-copy p strong { color: var(--text); font-weight: 500; }

/* ============================================================
   MECHANISM STRIP
   ============================================================ */
.mech { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-2); }
.mech-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.mech-cell { padding: 58px 34px 62px; border-left: 1px solid var(--line); }
.mech-cell:first-child { border-left: none; padding-left: 0; }
.mech-cell .m-kicker { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--signal); margin-bottom: 16px; }
.mech-cell h3 { font-size: 18px; font-weight: 600; letter-spacing: -0.015em; margin-bottom: 10px; }
.mech-cell p { font-size: 13.5px; color: var(--sub); line-height: 1.6; }

/* ============================================================
   CLOSE
   ============================================================ */
.close-section {
  position: relative; overflow: hidden;
  padding: 190px 0 170px;
  text-align: center;
}
.close-media { position: absolute; inset: 0; z-index: 0; }
.close-media video, .close-media .close-poster {
  width: 100%; height: 100%; object-fit: cover;
  transform: scaleX(-1);
  opacity: 0.62;
}
.close-media .close-poster { background: url('../video/hero-poster.jpg') center / cover no-repeat; }
.close-scrim {
  position: absolute; inset: 0; z-index: 1;
  background:
    linear-gradient(180deg, var(--bg) 0%, rgba(8, 9, 12, 0.55) 30%, rgba(8, 9, 12, 0.45) 60%, var(--bg) 100%);
}
.close-inner { position: relative; z-index: 2; }
.close-inner h2 { font-size: clamp(36px, 5.4vw, 64px); max-width: 15ch; margin: 24px auto 18px; }
.close-inner .sub-line { max-width: 44ch; margin: 0 auto; }
.close-ctas { margin-top: 40px; display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }
.close-inner .hero-note { margin-top: 20px; }

/* ============================================================
   FOOTER
   ============================================================ */
footer { border-top: 1px solid var(--line); padding: 34px 0 42px; }
.foot-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.foot-brand { display: flex; align-items: center; gap: 10px; }
.foot-brand .name { font-size: 14px; font-weight: 600; }
.foot-brand .tag { font-family: var(--mono); font-size: 11px; color: var(--dim); margin-left: 8px; letter-spacing: 0.04em; }
.foot-links { display: flex; gap: 22px; }
.foot-links a { font-size: 12.5px; color: var(--dim); text-decoration: none; transition: color 0.25s ease; }
.foot-links a:hover { color: var(--sub); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 980px) {
  .panel, .panel:nth-child(even) { grid-template-columns: 1fr; gap: 26px; align-items: start; }
  .panel:nth-child(even) .panel-copy { order: 0; }
  .panel-copy p { max-width: 56ch; }
  .proof-grid { gap: 90px; }
  .mech-grid { grid-template-columns: 1fr 1fr; }
  .mech-cell { padding: 40px 28px; }
  .mech-cell:nth-child(odd) { border-left: none; padding-left: 0; }
  .mech-cell:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}
@media (max-width: 760px) {
  .section-pad { padding: 100px 0; }
  .nav-links a:not(.btn) { display: none; }
  .hero h1 { font-size: clamp(40px, 11vw, 58px); }
  .hero .kicker { font-size: 10px; letter-spacing: 0.16em; }
  .hero .sub-line { font-size: 16px; }
  .hero-sources .row { gap: 8px 22px; }
  .loop-figure { display: none; }
  .loop-mobile { display: flex; flex-direction: column; align-items: center; gap: 0; margin-top: 56px; }
  .lm-block { width: 100%; max-width: 420px; border: 1px solid var(--line-strong); border-radius: 14px; padding: 18px 20px; background: var(--panel); }
  .lm-block .lm-title { font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--dim); margin-bottom: 10px; }
  .lm-srcs { display: flex; flex-wrap: wrap; gap: 8px; }
  .lm-srcs span { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--sub); border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; }
  .lm-core { border-color: rgba(111, 220, 255, 0.4); display: flex; align-items: center; gap: 12px; }
  .lm-core .lm-name { font-size: 15px; font-weight: 600; }
  .lm-core .lm-what { font-family: var(--mono); font-size: 10.5px; color: var(--dim); letter-spacing: 0.06em; }
  .lm-steps { display: flex; flex-direction: column; gap: 8px; }
  .lm-steps .step { display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--sub); }
  .lm-steps .step i { width: 6px; height: 6px; border-radius: 50%; background: var(--signal); opacity: 0.75; flex: none; }
  .lm-pr { border-color: var(--signal); }
  .lm-pr .lm-title { color: var(--signal); }
  .lm-pr .lm-big { font-size: 15px; font-weight: 600; }
  .lm-arrow { width: 1px; height: 34px; background: linear-gradient(180deg, rgba(111, 220, 255, 0.5), rgba(111, 220, 255, 0.1)); margin: 0 auto; }
  .mech-grid { grid-template-columns: 1fr; }
  .mech-cell { border-left: none; padding: 30px 0; border-bottom: 1px solid var(--line); }
  .mech-cell:last-child { border-bottom: none; }
  .mech-cell:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .close-section { padding: 130px 0 110px; }
  .foot-row { flex-direction: column; align-items: flex-start; }
}

/* ============================================================
   REDUCED MOTION — page fully legible static
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .loop-svg .pulse { animation: none; opacity: 0; }
  .hero-sources .src i { animation: none; }
  .btn { transition: none; }
  * { animation-duration: 0.001s !important; }
}