/* ArcComplete — homepage */

/* ---------------------------------------------------------------- hero */
.hero { --hero-p: 0; position: relative; min-height: 100svh; display: grid; align-items: center; padding: 150px 0 clamp(72px, 9vh, 120px); overflow: hidden; background: var(--bg); }
.hero__glow--blue { --gx: 70%; --gy: 50%; --gw: min(100vw, 1400px); --go: 0.6; animation: fade-in 1100ms var(--ease-out) 80ms both; }
.hero__glow--violet { --gx: 90%; --gy: 14%; --gw: min(56vw, 760px); --go: 0.45; animation: fade-in 1400ms var(--ease-out) 320ms both; }
.hero__grid { position: relative; z-index: 2; display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr); gap: clamp(32px, 5vw, 88px); align-items: center; }
.hero__copy { display: flex; flex-direction: column; align-items: flex-start; gap: 26px; opacity: calc(1 - var(--hero-p) * 1.3); transform: translate3d(0, calc(var(--hero-p) * -3vh), 0); }
.hero__title { max-width: 12ch; }
.hero__lead { max-width: 34rem; }
.hero__cta { --cluster: 12px; margin-top: 6px; }
.hero__visual { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: clamp(20px, 2.8vw, 44px); align-items: center; justify-content: center; opacity: calc(1 - var(--hero-p) * 1.45); transform: scale(calc(1 - var(--hero-p) * 0.06)); transform-origin: 50% 40%; }
.hero__device { display: flex; flex-direction: column; align-items: center; gap: 14px; animation: rise 900ms var(--ease-out) 520ms both; }
.hero__device .device { width: 280px; }
.hero__caption { font-size: 11px; color: var(--fg-3); letter-spacing: 0.08em; text-transform: uppercase; }
.hero__apps { display: flex; flex-direction: column; gap: 4px; }
.hero__app { animation: rise 600ms var(--ease-out) both; animation-delay: calc(760ms + var(--i, 0) * 70ms); }
.hero__app a { display: grid; grid-template-columns: 44px minmax(0, 1fr) auto; align-items: center; gap: 14px; padding: 9px 14px 9px 9px; border-radius: var(--r-md); border: 1px solid transparent; transition: background var(--micro) var(--ease-out), border-color var(--micro) var(--ease-out), transform var(--micro) var(--ease-out); }
.hero__app a:hover { background: rgba(255, 255, 255, 0.03); border-color: var(--line); transform: translateX(2px); }
.hero__app-text b { display: block; font-weight: 500; font-size: 15px; letter-spacing: -0.01em; }
.hero__app-text small { display: block; font-size: 12px; color: var(--fg-3); margin-top: 1px; }
.hero__app-status { font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-3); white-space: nowrap; }
.hero__app.is-live .hero__app-status { color: var(--accent); }
.hero__app:not(.is-live) .app-icon:not(:has(img)) { background: rgba(255, 255, 255, 0.035); color: var(--fg-3); box-shadow: inset 0 0 0 1px var(--line); }
.hero__app:not(.is-live) .app-icon:has(img) { filter: saturate(0.4); opacity: 0.75; }
.hero__app:not(.is-live):hover .app-icon { background: var(--accent-soft); color: var(--accent); filter: none; opacity: 1; }
.hero__scroll { position: absolute; left: var(--gutter); bottom: 26px; z-index: 2; display: inline-flex; align-items: center; gap: 14px; font-size: 13px; color: var(--fg-3); letter-spacing: 0.02em; opacity: calc(1 - var(--hero-p) * 3); }
.hero__scroll i { display: block; width: 1px; height: 36px; background: linear-gradient(to bottom, var(--fg-3) 0 40%, transparent 40% 100%); background-size: 100% 200%; animation: scroll-hint 2400ms var(--ease-in-out) infinite; }

/* intro ≤ 1.3 s: arc trace (canvas) → headline mask + blur-to-sharp → copy → CTAs rise 12 px → nodes */
.hero__eyebrow { animation: rise 600ms var(--ease-out) 260ms both; }
.hero__title {
  -webkit-mask-image: linear-gradient(to right, #000 42%, transparent 60%); mask-image: linear-gradient(to right, #000 42%, transparent 60%);
  -webkit-mask-size: 260% 100%; mask-size: 260% 100%; -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat;
  animation: reveal-mask 820ms var(--ease-out) 380ms both, blur-in 900ms var(--ease-out) 380ms both;
}
.hero__lead { animation: rise 600ms var(--ease-out) 620ms both; }
.hero__cta { animation: rise 600ms var(--ease-out) 720ms both; }
.hero__scroll { animation: fade-in 800ms var(--ease-out) 1050ms backwards; }
@keyframes rise { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes blur-in { from { filter: blur(8px); } to { filter: blur(0); } }
@keyframes reveal-mask { from { -webkit-mask-position: 100% 0; mask-position: 100% 0; } to { -webkit-mask-position: 0% 0; mask-position: 0% 0; } }
@keyframes scroll-hint { 0% { background-position: 0 100%; } 100% { background-position: 0 -100%; } }

/* ---------------------------------------------------------------- transition */
.transition { padding-block: clamp(120px, 15vw, 220px) clamp(40px, 6vw, 96px); background: linear-gradient(180deg, var(--bg), var(--graphite-deep)); }
.transition .t-statement { color: var(--fg-2); margin-bottom: 28px; font-family: var(--font-serif); font-style: italic; font-weight: 400; letter-spacing: -0.01em; }

/* ---------------------------------------------------------------- the arc (ecosystem) */
.eco { padding: 0; background: linear-gradient(180deg, var(--graphite-deep), var(--bg) 60%); }
.eco__glow { --gx: 50%; --gy: 50%; --gw: min(84vw, 1040px); --go: 0.55; }
.eco[data-active="body"] { --accent: var(--c-body); --accent-soft: var(--c-body-soft); --accent-glow: var(--c-body-glow); }
.eco[data-active="execution"] { --accent: var(--c-focus); --accent-soft: var(--c-focus-soft); --accent-glow: var(--c-focus-glow); }
.eco[data-active="capability"] { --accent: var(--c-learn); --accent-soft: var(--c-learn-soft); --accent-glow: var(--c-learn-glow); }
.eco[data-active="direction"] { --accent: var(--c-life); --accent-soft: var(--c-life-soft); --accent-glow: var(--c-life-glow); }
.eco[data-active="social"] { --accent: var(--c-social); --accent-soft: var(--c-social-soft); --accent-glow: var(--c-social-glow); }
.eco[data-active="financial"] { --accent: var(--c-money); --accent-soft: var(--c-money-soft); --accent-glow: var(--c-money-glow); }
.eco[data-active="intro"] .eco__glow, .eco[data-active="all"] .eco__glow { --go: 0.3; }
.eco__layout { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: clamp(32px, 5vw, 96px); align-items: start; }
.eco__stage { position: sticky; top: 0; height: 100svh; display: grid; place-items: center; }
.eco__scene { position: relative; width: min(100%, 640px); aspect-ratio: 1; }
.eco__orbit { position: absolute; inset: 0; transform: rotate(var(--eco-rot, 0deg)); transition: transform 1200ms var(--ease-soft); }
.eco[data-active="all"] .eco__orbit { transform: rotate(0deg) scale(0.94); }
.eco__svg { width: 100%; height: 100%; overflow: visible; }
.eco__svg .track { stroke: rgba(245, 244, 239, 0.09); stroke-width: 1; }
.eco__svg .seg { stroke: rgba(245, 244, 239, 0.22); stroke-width: 2; transition: stroke 500ms var(--ease-out), stroke-width 500ms var(--ease-out); }
.eco__svg .seg-glow { stroke: var(--accent); stroke-width: 12; opacity: 0; filter: blur(8px); transition: opacity 600ms var(--ease-out); }
.eco[data-active="body"] .seg[data-seg="body"], .eco[data-hover="body"] .seg[data-seg="body"],
.eco[data-active="execution"] .seg[data-seg="execution"], .eco[data-hover="execution"] .seg[data-seg="execution"],
.eco[data-active="capability"] .seg[data-seg="capability"], .eco[data-hover="capability"] .seg[data-seg="capability"],
.eco[data-active="direction"] .seg[data-seg="direction"], .eco[data-hover="direction"] .seg[data-seg="direction"],
.eco[data-active="social"] .seg[data-seg="social"], .eco[data-hover="social"] .seg[data-seg="social"],
.eco[data-active="financial"] .seg[data-seg="financial"], .eco[data-hover="financial"] .seg[data-seg="financial"],
.eco[data-active="all"] .seg { stroke: var(--accent); stroke-width: 3; }
.eco[data-active="body"] .seg-glow[data-seg="body"], .eco[data-hover="body"] .seg-glow[data-seg="body"],
.eco[data-active="execution"] .seg-glow[data-seg="execution"], .eco[data-hover="execution"] .seg-glow[data-seg="execution"],
.eco[data-active="capability"] .seg-glow[data-seg="capability"], .eco[data-hover="capability"] .seg-glow[data-seg="capability"],
.eco[data-active="direction"] .seg-glow[data-seg="direction"], .eco[data-hover="direction"] .seg-glow[data-seg="direction"],
.eco[data-active="social"] .seg-glow[data-seg="social"], .eco[data-hover="social"] .seg-glow[data-seg="social"],
.eco[data-active="financial"] .seg-glow[data-seg="financial"], .eco[data-hover="financial"] .seg-glow[data-seg="financial"] { opacity: 0.6; }
.eco[data-active="all"] .seg-glow { opacity: 0.32; }
.eco__chords path { fill: none; stroke: var(--accent); stroke-width: 1; opacity: 0.45; stroke-dasharray: 900; stroke-dashoffset: 900; transition: stroke-dashoffset 1400ms var(--ease-out); }
.eco[data-active="all"] .eco__chords path { stroke-dashoffset: 0; }
.eco__chords path:nth-child(2) { transition-delay: 120ms; } .eco__chords path:nth-child(3) { transition-delay: 240ms; } .eco__chords path:nth-child(4) { transition-delay: 360ms; } .eco__chords path:nth-child(5) { transition-delay: 480ms; } .eco__chords path:nth-child(6) { transition-delay: 600ms; } .eco__chords path:nth-child(7) { transition-delay: 720ms; }
.eco__node { position: absolute; display: flex; flex-direction: column; align-items: center; gap: 8px; transform: translate(-50%, -50%) rotate(calc(var(--eco-rot, 0deg) * -1)); transition: transform 1200ms var(--ease-soft); cursor: pointer; }
.eco__node .disc { width: 46px; height: 46px; background: var(--graphite); color: var(--fg-3); box-shadow: inset 0 0 0 1px var(--line-strong), 0 6px 20px rgba(0, 0, 0, 0.4); transition: transform 400ms var(--ease-out), box-shadow 400ms var(--ease-out), background 400ms var(--ease-out), color 400ms var(--ease-out); animation: breathe 6s var(--ease-in-out) infinite; }
.eco__node:nth-of-type(2) .disc { animation-delay: -1s; } .eco__node:nth-of-type(3) .disc { animation-delay: -2s; } .eco__node:nth-of-type(4) .disc { animation-delay: -3s; } .eco__node:nth-of-type(5) .disc { animation-delay: -4s; } .eco__node:nth-of-type(6) .disc { animation-delay: -5s; }
@keyframes breathe { 0%, 100% { scale: 1; } 50% { scale: 1.045; } }
.eco__spark { fill: #fff; opacity: 0; filter: drop-shadow(0 0 6px var(--accent)); transition: opacity 600ms var(--ease-out) 900ms; }
.eco[data-active="all"] .eco__spark { opacity: 0.9; }
.eco__tag { font-size: 11px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-3); padding: 3px 8px; border-radius: 999px; background: var(--bg); transition: color 400ms var(--ease-out); }
.eco[data-active="body"] .eco__node[data-seq-hover="body"], .eco[data-hover="body"] .eco__node[data-seq-hover="body"],
.eco[data-active="execution"] .eco__node[data-seq-hover="execution"], .eco[data-hover="execution"] .eco__node[data-seq-hover="execution"],
.eco[data-active="capability"] .eco__node[data-seq-hover="capability"], .eco[data-hover="capability"] .eco__node[data-seq-hover="capability"],
.eco[data-active="direction"] .eco__node[data-seq-hover="direction"], .eco[data-hover="direction"] .eco__node[data-seq-hover="direction"],
.eco[data-active="social"] .eco__node[data-seq-hover="social"], .eco[data-hover="social"] .eco__node[data-seq-hover="social"],
.eco[data-active="financial"] .eco__node[data-seq-hover="financial"], .eco[data-hover="financial"] .eco__node[data-seq-hover="financial"],
.eco[data-active="all"] .eco__node { --lit: 1; }
.eco__node { --lit: 0; }
.eco__node .disc { background: color-mix(in srgb, var(--graphite) calc(100% - var(--lit) * 85%), var(--accent-soft) calc(var(--lit) * 85%)); color: color-mix(in srgb, var(--fg-3) calc(100% - var(--lit) * 100%), var(--accent) calc(var(--lit) * 100%)); }
.eco__node[style*="--lit: 1"] .disc, .eco[data-active="all"] .eco__node .disc { box-shadow: inset 0 0 0 1px var(--accent), 0 0 30px var(--accent-glow); }
.eco[data-active="body"] .eco__node[data-seq-hover="body"] .disc, .eco[data-hover="body"] .eco__node[data-seq-hover="body"] .disc,
.eco[data-active="execution"] .eco__node[data-seq-hover="execution"] .disc, .eco[data-hover="execution"] .eco__node[data-seq-hover="execution"] .disc,
.eco[data-active="capability"] .eco__node[data-seq-hover="capability"] .disc, .eco[data-hover="capability"] .eco__node[data-seq-hover="capability"] .disc,
.eco[data-active="direction"] .eco__node[data-seq-hover="direction"] .disc, .eco[data-hover="direction"] .eco__node[data-seq-hover="direction"] .disc,
.eco[data-active="social"] .eco__node[data-seq-hover="social"] .disc, .eco[data-hover="social"] .eco__node[data-seq-hover="social"] .disc,
.eco[data-active="financial"] .eco__node[data-seq-hover="financial"] .disc, .eco[data-hover="financial"] .eco__node[data-seq-hover="financial"] .disc { transform: scale(1.14); box-shadow: inset 0 0 0 1px var(--accent), 0 0 34px var(--accent-glow), 0 6px 20px rgba(0, 0, 0, 0.4); }
.eco[data-active="body"] .eco__node[data-seq-hover="body"] .eco__tag, .eco[data-active="execution"] .eco__node[data-seq-hover="execution"] .eco__tag,
.eco[data-active="capability"] .eco__node[data-seq-hover="capability"] .eco__tag, .eco[data-active="direction"] .eco__node[data-seq-hover="direction"] .eco__tag,
.eco[data-active="social"] .eco__node[data-seq-hover="social"] .eco__tag, .eco[data-active="financial"] .eco__node[data-seq-hover="financial"] .eco__tag,
.eco[data-active="all"] .eco__tag, .eco__node:hover .eco__tag { color: var(--fg); }
.eco__center { position: absolute; inset: 0; display: grid; place-items: center; pointer-events: none; }
.eco__center::before { content: ""; position: absolute; width: 42%; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle closest-side, var(--accent-soft), transparent 100%); transition: background 700ms var(--ease-out); }
.eco__center span { position: relative; font-size: clamp(28px, 3.2vw, 48px); font-weight: 500; letter-spacing: -0.035em; }
.eco__preview { position: absolute; right: -8%; top: 50%; width: 256px; padding: 18px; transform: translateY(-50%) translateX(14px); opacity: 0; pointer-events: none; transition: opacity 500ms var(--ease-out), transform 600ms var(--ease-out); z-index: 3; }
.eco[data-active="body"] .eco__preview[data-preview="body"], .eco[data-active="execution"] .eco__preview[data-preview="execution"],
.eco[data-active="capability"] .eco__preview[data-preview="capability"], .eco[data-active="direction"] .eco__preview[data-preview="direction"],
.eco[data-active="social"] .eco__preview[data-preview="social"], .eco[data-active="financial"] .eco__preview[data-preview="financial"],
.eco[data-active="all"] .eco__preview[data-preview="all"] { opacity: 1; transform: translateY(-50%); }
.eco__preview .disc { margin-bottom: 12px; }
.eco__preview h4 { font-size: 16px; font-weight: 500; letter-spacing: -0.01em; margin-bottom: 4px; }
.eco__preview p { font-size: 13px; color: var(--fg-2); line-height: 1.45; }
.eco__preview .chips { margin-top: 12px; }
.eco__preview .ui-card { margin-top: 10px; padding: 12px; }
.eco__preview .ui-card .ui-value { font-size: 18px; }
.eco__preview--all { text-align: left; }
.eco__preview--all .cluster { --cluster: 6px; margin-bottom: 12px; }
.eco__preview--all .disc { width: 30px; height: 30px; margin: 0; }
.eco__preview--all .disc svg { width: 15px; height: 15px; }
.eco__steps { padding-block: 16svh 8svh; }
.eco__step { min-height: 100svh; display: flex; flex-direction: column; justify-content: center; gap: 16px; opacity: 0.3; transition: opacity 450ms var(--ease-out); }
.eco__step[data-seq-step="intro"], .eco__step[data-seq-step="all"] { min-height: 80svh; }
.eco__systems { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 22px; margin: 8px 0 4px; }
.eco__systems div { padding-top: 12px; border-top: 1px solid var(--line); }
.eco__systems dt { font-size: 14px; font-weight: 500; color: var(--fg); margin-bottom: 4px; }
.eco__systems dd { margin: 0; font-size: 14px; line-height: 1.5; color: var(--fg-2); }
.eco__step .t-title { font-size: clamp(26px, 2.6vw, 38px); }
.eco__step__head { display: flex; align-items: center; gap: 12px; }
.eco__step__head .eyebrow { color: var(--accent); }
.eco__step ul { display: flex; flex-direction: column; gap: 8px; color: var(--fg-2); font-size: 16px; }
.eco__step li { display: flex; gap: 10px; align-items: baseline; }
.eco__step li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex: none; transform: translateY(-2px); }
.eco[data-active="intro"] .eco__step[data-seq-step="intro"], .eco[data-active="body"] .eco__step[data-seq-step="body"],
.eco[data-active="execution"] .eco__step[data-seq-step="execution"], .eco[data-active="capability"] .eco__step[data-seq-step="capability"],
.eco[data-active="direction"] .eco__step[data-seq-step="direction"], .eco[data-active="social"] .eco__step[data-seq-step="social"],
.eco[data-active="financial"] .eco__step[data-seq-step="financial"], .eco[data-active="all"] .eco__step[data-seq-step="all"] { opacity: 1; }
.eco__step .status { margin-top: 4px; }

/* ---------------------------------------------------------------- intelligence */
.intel { background: linear-gradient(180deg, var(--bg), var(--indigo-deep) 30%, var(--indigo-deep) 70%, var(--bg)); }
.intel__glow--a { --gx: 80%; --gy: 30%; --gw: min(70vw, 900px); --go: 0.45; }
.intel__glow--b { --gx: 15%; --gy: 80%; --gw: min(60vw, 760px); --go: 0.35; }
.intel__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 64px; perspective: 1200px; }
.insight { display: flex; flex-direction: column; gap: 22px; padding: 26px 26px 28px; min-height: 290px; }
.insight__pair { display: flex; align-items: center; gap: 10px; font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-3); }
.insight__pair .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.insight__pair i.line { width: 14px; height: 1px; background: var(--fg-4); }
.insight__arc { height: 60px; width: 100%; }
.insight__arc .end { fill: var(--accent); }
.insight__pulse { fill: #fff; filter: drop-shadow(0 0 5px #fff); }
.insight p { font-size: 19px; line-height: 1.42; letter-spacing: -0.012em; margin-top: auto; }
.intel__note { margin-top: 24px; font-size: 14px; color: var(--fg-3); }

/* ---------------------------------------------------------------- arcbody spotlight */
.spot { overflow: hidden; background: linear-gradient(180deg, var(--bg), var(--graphite-deep) 50%, var(--bg)); }
.spot__glow { --gx: 50%; --gy: 62%; --gw: min(80vw, 1000px); --go: 0.5; }
.spot__head { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr); gap: 48px; align-items: end; }
.spot__scene { --detach: 0; position: relative; margin-top: 72px; height: 800px; display: grid; place-items: center; perspective: 1400px; }
.spot__arc { position: absolute; left: 50%; top: 50%; width: 900px; height: 900px; transform: translate(-50%, -50%); pointer-events: none; }
.spot__arc .arc-core { stroke-width: 1; opacity: 0.8; }
.spot__module { position: absolute; width: 236px; padding: 16px 18px; font-size: 13px; opacity: calc(0.55 + var(--detach) * 0.45); transform: translate3d(calc(var(--dx) * var(--detach)), calc(var(--dy) * var(--detach)), 0); }
.spot__module .ui-label { margin-bottom: 8px; }
.spot__module .ui-value { font-size: 24px; }
.spot__module--cal { left: 8%; top: 16%; --dx: -36px; --dy: -22px; }
.spot__module--wo { right: 8%; top: 22%; --dx: 36px; --dy: -18px; }
.spot__module--pro { left: 10%; bottom: 20%; --dx: -32px; --dy: 24px; }
.spot__module--prog { right: 9%; bottom: 16%; --dx: 34px; --dy: 22px; }
.spot__caption { margin-top: 44px; display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
.spot__caption p { font-size: 14px; color: var(--fg-3); }
.spot__flow { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 20px; margin-top: 64px; padding-top: 40px; border-top: 1px solid var(--line); }
.spot__flow p { font-family: var(--font-serif); font-style: italic; font-size: 24px; letter-spacing: -0.005em; }
.spot__flow p:first-child { color: var(--fg-3); }
.spot__flow svg { width: 40px; height: 14px; color: var(--fg-3); }

/* nutrition workflow inside the device */
.ui-sheet { position: absolute; left: 0; right: 0; bottom: 0; z-index: 3; padding: 16px 18px 24px; background: #12151C; border-top: 1px solid rgba(255, 255, 255, 0.07); border-radius: var(--r-lg) var(--r-lg) 0 0; transform: translateY(105%); transition: transform 420ms var(--ease-out); }
[data-phase="2"] .ui-sheet, [data-phase="3"] .ui-sheet, [data-phase="4"] .ui-sheet { transform: none; }
.ui-search { display: flex; align-items: center; gap: 8px; height: 38px; padding: 0 12px; border-radius: var(--r-sm); background: rgba(255, 255, 255, 0.05); color: var(--fg-3); font-size: 13px; margin-bottom: 8px; }
.ui-search b { color: var(--fg); font-weight: 400; }
.ui-result { display: flex; justify-content: space-between; padding: 10px 8px; border-radius: var(--r-xs); font-size: 13px; transition: background 200ms var(--ease-out), box-shadow 200ms var(--ease-out); }
.ui-result span { color: var(--fg-3); }
[data-phase="3"] .ui-result--pick, [data-phase="4"] .ui-result--pick { background: var(--accent-soft); box-shadow: inset 0 0 0 1px var(--accent-glow); }
[data-phase="1"] .ui-fab { transform: scale(0.96); filter: brightness(0.9); }
[data-phase="4"] .ui-value--cal, [data-phase="5"] .ui-value--cal { color: var(--accent); }

/* ---------------------------------------------------------------- principles */
.principles__list { margin-top: 56px; border-top: 1px solid var(--s-line); }
.principle { position: relative; display: grid; grid-template-columns: 72px minmax(0, 1.1fr) minmax(0, 0.9fr); gap: 32px; padding: 48px 24px; margin-inline: -24px; border-bottom: 1px solid var(--s-line); border-radius: var(--r-sm); transition: background 400ms var(--ease-out); overflow: hidden; }
.principle::before { content: attr(data-num); position: absolute; right: 2%; top: 50%; transform: translateY(-50%); font-size: clamp(120px, 14vw, 220px); font-weight: 500; letter-spacing: -0.06em; line-height: 1; color: rgba(245, 244, 239, 0.03); pointer-events: none; transition: color 400ms var(--ease-out); }
.principle:hover { background: linear-gradient(90deg, var(--accent-soft), transparent 60%); }
.principle:hover::before { color: var(--accent-soft); }
.principle__num { font-size: 13px; color: var(--accent); font-variant-numeric: tabular-nums; padding-top: 12px; letter-spacing: 0.06em; }
.principle h3 { font-size: clamp(30px, 3.4vw, 52px); font-weight: 500; letter-spacing: -0.035em; line-height: 1.05; }
.principle h3 span { background-image: linear-gradient(var(--accent), var(--accent)); background-repeat: no-repeat; background-size: 0% 2px; background-position: 0 100%; transition: background-size 400ms var(--ease-out); }
.principle:hover h3 span { background-size: 100% 2px; }
.principle p { padding-top: 10px; position: relative; }

/* ---------------------------------------------------------------- how arcbody works (warm) */
.how { padding-block: clamp(120px, 14vw, 200px) clamp(72px, 8vw, 120px); }
.how__steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(16px, 2.2vw, 32px); margin-top: 64px; counter-reset: how; }
.how__step { display: flex; flex-direction: column; gap: 22px; }
.how__shot { position: relative; width: 100%; max-width: 232px; aspect-ratio: 1440 / 3088; border-radius: var(--r-xl); background: #0C0E14; overflow: hidden; box-shadow: 0 0 0 1px rgba(11, 12, 15, 0.14), 0 0 0 5px #151922, 0 0 0 6px rgba(255, 255, 255, 0.06), 0 24px 50px rgba(11, 12, 15, 0.22); }
.how__num { display: inline-block; font-size: 13px; color: var(--accent); letter-spacing: 0.06em; font-variant-numeric: tabular-nums; margin-bottom: 10px; }
.how__text h3 { margin-bottom: 10px; }
.how__text p { color: var(--s-fg-2); font-size: 16px; line-height: 1.5; text-wrap: pretty; }
.how__note { margin-top: 44px; }

/* ---------------------------------------------------------------- faq (warm) */
.faq { padding-top: 0; }
.faq__grid { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: clamp(32px, 5vw, 96px); align-items: start; border-top: 1px solid var(--s-line); padding-top: clamp(56px, 7vw, 96px); }
.faq__head { position: sticky; top: 110px; display: flex; flex-direction: column; gap: 16px; }
.faq__search { display: flex; align-items: center; gap: 10px; padding: 0 14px; height: 46px; margin-bottom: 8px; border-radius: var(--r-sm); border: 1px solid var(--s-line-strong); background: #fff; color: var(--s-fg-3); }
.faq__search input { flex: 1; border: 0; outline: none; background: none; font: inherit; color: var(--s-fg); }
.faq__search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.faq__item { border-bottom: 1px solid var(--s-line); scroll-margin-top: 110px; }
.faq__item[hidden] { display: none; }
.faq__link { display: inline-block; margin-top: 12px; font-size: 13px; color: var(--s-fg-3); text-decoration: underline; text-underline-offset: 3px; }
.faq__link:hover, .faq__item:target .faq__link { color: var(--accent); }
.faq__none { padding: 24px 0; }
.faq__item summary { list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 22px 0; font-size: clamp(18px, 1.5vw, 22px); font-weight: 500; letter-spacing: -0.015em; }
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary i { position: relative; flex: none; width: 28px; height: 28px; border-radius: 50%; border: 1px solid var(--s-line-strong); color: var(--s-fg-2); transition: transform 300ms var(--ease-out), background 300ms var(--ease-out), border-color 300ms var(--ease-out); }
.faq__item summary i::before, .faq__item summary i::after { content: ""; position: absolute; left: 50%; top: 50%; width: 12px; height: 1.5px; background: currentColor; transform: translate(-50%, -50%); }
.faq__item summary i::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq__item[open] summary i { transform: rotate(45deg); background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.faq__answer { padding: 0 56px 26px 0; color: var(--s-fg-2); font-size: 17px; line-height: 1.55; text-wrap: pretty; }
.faq__answer p + p { margin-top: 10px; }

/* ---------------------------------------------------------------- ARC / COMPLETE (warm) */
.story { --story-p: 0; --story-gap: 0px; --story-gap-def: 0px; padding-top: 0; padding-bottom: clamp(96px, 12vw, 170px); }
.story__split { display: flex; justify-content: center; align-items: flex-start; gap: clamp(56px, 9vw, 160px); border-top: 1px solid var(--s-line); padding-top: 64px; }
.story__half { display: flex; flex-direction: column; align-items: flex-start; }
.story__word { width: max-content; font-size: clamp(64px, 10.5vw, 176px); font-weight: 500; letter-spacing: var(--track-word); line-height: 0.95; will-change: transform; }
.story__word--arc { transform: translate3d(calc(var(--story-p) * var(--story-gap) / 2), 0, 0); }
.story__word--complete { transform: translate3d(calc(var(--story-p) * var(--story-gap) / -2), 0, 0); }
.story__def { width: max-content; max-width: 21rem; margin-top: 28px; font-family: var(--font-serif); font-style: italic; font-weight: 400; font-size: clamp(20px, 1.8vw, 27px); letter-spacing: -0.005em; line-height: 1.35; color: var(--s-fg-2); opacity: calc(0.45 + var(--story-p) * 0.55); will-change: transform; }
.story__def--a { transform: translate3d(calc(var(--story-p) * var(--story-gap-def) / 2), 0, 0); }
.story__def--b { transform: translate3d(calc(var(--story-p) * var(--story-gap-def) / -2), 0, 0); }
.story__line { margin: clamp(56px, 7vw, 100px) auto 0; max-width: 40rem; text-align: center; font-size: var(--t-lead); line-height: 1.5; color: var(--s-fg-2); opacity: calc((var(--story-p) - 0.75) * 4); transform: translateY(calc((1 - var(--story-p)) * 14px)); text-wrap: pretty; }

/* ---------------------------------------------------------------- final */
.final { position: relative; padding-block: clamp(120px, 14vw, 200px); background: linear-gradient(180deg, var(--bg), var(--indigo-deep)); }
.final__glow--a { --gx: 30%; --gy: 40%; --gw: min(80vw, 1000px); --go: 0.4; }
.final__glow--b { --gx: 85%; --gy: 80%; --gw: min(50vw, 640px); --go: 0.3; }
.final__grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: clamp(40px, 6vw, 96px); align-items: center; }
.final__copy { display: flex; flex-direction: column; align-items: flex-start; gap: 24px; }
.final__copy .t-hero { font-size: clamp(44px, 6vw, 92px); max-width: 12ch; }
.final__form { padding: 28px; border-radius: var(--r-lg); background: rgba(255, 255, 255, 0.03); border: 1px solid var(--line); box-shadow: var(--shadow-2); }
.final__form .t-title { margin-bottom: 18px; }
.final__form .waitlist { max-width: none; }

/* ---------------------------------------------------------------- responsive */
@media (max-width: 1100px) {
  .spot__head { grid-template-columns: 1fr; }
  .intel__grid { grid-template-columns: 1fr 1fr; }
  .hero__grid { grid-template-columns: 1fr; gap: 48px; }
  .hero__visual { justify-content: start; }
  .how__steps { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px 24px; }
}
@media (max-width: 900px) {
  .hero { padding-top: 120px; }
  .eco__layout { grid-template-columns: 1fr; }
  .eco__stage { position: relative; height: auto; padding-top: 24px; }
  .eco__scene { width: min(100%, 460px); margin-inline: auto; }
  .eco__preview { display: none; }
  .eco__steps { padding-block: 0 20px; }
  .eco__step, .eco__step[data-seq-step="intro"], .eco__step[data-seq-step="all"] { min-height: 0; padding: 32px 0; opacity: 1; border-top: 1px solid var(--line); }
  .spot__scene { height: auto; padding: 24px 0; display: flex; flex-direction: column; gap: 20px; align-items: center; }
  .spot__module { position: static; width: min(100%, 360px); transform: none; opacity: 1; }
  .spot__arc { display: none; }
  .principle { grid-template-columns: 56px 1fr; padding-inline: 12px; margin-inline: -12px; }
  .principle p { grid-column: 2; padding-top: 0; }
  .principle::before { display: none; }
  .story__split { flex-direction: column; gap: 48px; }
  .story__word--arc, .story__word--complete, .story__def--a, .story__def--b { transform: none; }
  .story__def { opacity: 1; }
  .story__line { opacity: 1; transform: none; text-align: left; margin-inline: 0; }
  .spot__flow { grid-template-columns: 1fr; }
  .spot__flow svg { transform: rotate(90deg); }
  .faq__grid { grid-template-columns: 1fr; gap: 32px; }
  .faq__head { position: static; }
  .final__grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .hero { min-height: 92svh; }
  .hero__title { max-width: 10ch; }
  .hero__visual { grid-template-columns: 1fr; justify-items: center; gap: 28px; }
  .hero__device .device { width: 230px; }
  .hero__apps { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; width: 100%; }
  .hero__app a { grid-template-columns: 36px minmax(0, 1fr); gap: 10px; padding: 8px; }
  .hero__app .app-icon { width: 36px; height: 36px; } .hero__app .app-icon svg { width: 18px; height: 18px; }
  .hero__app-status { display: none; }
  .hero__scroll { display: none; }
  .hero__eyebrow .eyebrow__more { display: none; }
  /* insight cards become a snap rail you thumb through */
  .intel__grid { display: flex; gap: 12px; overflow-x: auto; scroll-snap-type: x mandatory; margin-inline: calc(-1 * var(--gutter)); padding: 4px var(--gutter) 12px; scrollbar-width: none; }
  .intel__grid::-webkit-scrollbar { display: none; }
  .insight { flex: 0 0 82vw; scroll-snap-align: center; min-height: 250px; }
  .spot__scene { display: flex; flex-direction: row; gap: 12px; overflow-x: auto; scroll-snap-type: x mandatory; margin-inline: calc(-1 * var(--gutter)); padding: 24px var(--gutter); scrollbar-width: none; align-items: stretch; }
  .spot__scene::-webkit-scrollbar { display: none; }
  .spot__scene .device { flex: 0 0 auto; scroll-snap-align: center; }
  .spot__module { flex: 0 0 72vw; scroll-snap-align: center; width: auto; }
  .how__steps { display: flex; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; margin-inline: calc(-1 * var(--gutter)); padding: 4px var(--gutter) 12px; scrollbar-width: none; }
  .how__steps::-webkit-scrollbar { display: none; }
  .how__step { flex: 0 0 76vw; scroll-snap-align: center; }
  .eco__systems { grid-template-columns: 1fr; }
  .eco__node .disc { width: 36px; height: 36px; }
  .eco__node .disc svg { width: 17px; height: 17px; }
  .eco__tag { font-size: 9px; }
  .faq__answer { padding-right: 0; }
}