/* ============================================================
   SPRINTORS — Landing Page
   Palette: warm light + rust · Type: Archivo + Space Mono
   ============================================================ */

:root {
  --bg:        #eceeec;   /* cool light stone      */
  --bg-2:      #e1e4e1;   /* alt band / panel      */
  --ink:       #181a19;   /* cool near-black       */
  --ink-2:     #565b57;   /* secondary text        */
  --ink-3:     #888d88;   /* tertiary / captions   */
  --line:      #d6d8d3;   /* hairline              */
  --line-2:    #c1c4be;   /* stronger hairline     */
  --rust:      #b9722e;   /* accent                */
  --rust-deep: #9a5a1d;   /* accent hover          */
  --rust-soft: rgba(185,114,46,.12);

  /* on dark bands */
  --d-bg:      #18191a;
  --d-bg-2:    #202122;
  --d-ink:     #eef0ed;
  --d-ink-2:   rgba(238,240,237,.66);
  --d-line:    rgba(238,240,237,.16);
  --d-rust:    #db8a3e;

  --container: 1320px;
  --pad: clamp(22px, 5.5vw, 104px);
  --col: 168px;           /* sticky number/label column */
  --gap: clamp(36px, 5vw, 80px);

  --ff: "Archivo", system-ui, sans-serif;
  --fm: "Space Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--ff);
  font-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -0.022em; line-height: 1.0; text-wrap: balance; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }

/* ---- shared atoms -------------------------------------------------- */
.wrap { max-width: var(--container); margin: 0 auto; padding-inline: var(--pad); }

.eyebrow {
  font-family: var(--fm); font-size: 12px; font-weight: 700;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink-2);
  display: inline-flex; align-items: center; gap: 12px;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--rust); }

.num { font-family: var(--fm); font-size: 13px; font-weight: 700; color: var(--rust); letter-spacing: .08em; }
.mono { font-family: var(--fm); }

.lede { color: var(--ink-2); font-size: clamp(17px, 1.4vw, 20px); line-height: 1.62; max-width: 62ch; text-wrap: pretty; }

/* ---- sunburst motif ------------------------------------------------ */
.burst { display: inline-block; color: var(--rust); }
.burst svg { display: block; width: 100%; height: 100%; }

/* ---- buttons ------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--ff); font-weight: 600; font-size: 16px; line-height: 1;
  padding: 16px 26px; border-radius: 2px; cursor: pointer; border: none;
  transition: transform .18s ease, background .18s ease, box-shadow .18s ease, color .18s ease;
  white-space: nowrap;
}
.btn .arw { transition: transform .2s ease; }
.btn:hover .arw { transform: translateX(4px); }

.btn--primary { background: var(--rust); color: #fff; }
.btn--primary:hover { background: var(--rust-deep); transform: translateY(-2px); box-shadow: 0 10px 24px -10px rgba(154,90,29,.7); }

.btn--ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 1.5px var(--line-2); }
.btn--ghost:hover { box-shadow: inset 0 0 0 1.5px var(--ink); transform: translateY(-2px); }

.btn--light { background: var(--d-ink); color: var(--ink); }
.btn--light:hover { background: #fff; transform: translateY(-2px); }
.btn--outline-light { background: transparent; color: var(--d-ink); box-shadow: inset 0 0 0 1.5px var(--d-line); }
.btn--outline-light:hover { box-shadow: inset 0 0 0 1.5px var(--d-ink); transform: translateY(-2px); }

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: sticky; top: 0; z-index: 50;
  transition: background .3s ease, box-shadow .3s ease, border-color .3s ease;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom-color: var(--line);
}
.nav__in { display: flex; align-items: center; justify-content: space-between; height: 74px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand .burst { width: 26px; height: 26px; }
.brand__name { font-family: var(--fm); font-weight: 700; font-size: 15px; letter-spacing: .2em; text-transform: uppercase; }
.nav__links { display: flex; align-items: center; gap: 34px; }
.nav__link { font-size: 15px; font-weight: 500; color: var(--ink-2); transition: color .15s; position: relative; }
.nav__link::after { content: ""; position: absolute; left: 0; bottom: -5px; width: 0; height: 1.5px; background: var(--rust); transition: width .22s ease; }
.nav__link:hover { color: var(--ink); }
.nav__link:hover::after { width: 100%; }
.nav__cta { display: flex; align-items: center; gap: 16px; }
.nav .btn { padding: 11px 18px; font-size: 14px; }
.nav__burger { display: none; }

/* ============================================================
   HERO
   ============================================================ */
.hero { position: relative; padding-top: clamp(56px, 9vh, 104px); padding-bottom: clamp(40px, 6vh, 72px); overflow: hidden; }
.hero__burst {
  position: absolute; top: clamp(-40px, 2vw, 30px); left: 50%; transform: translateX(-50%);
  width: min(82vw, 760px); aspect-ratio: 1; color: var(--rust);
  opacity: .05; pointer-events: none; z-index: 0;
}
.hero__in { position: relative; z-index: 1; text-align: center; display: flex; flex-direction: column; align-items: center; }
.hero h1 {
  font-size: clamp(52px, 11vw, 152px); font-weight: 800; letter-spacing: -0.035em; line-height: 0.92;
  margin-bottom: clamp(22px, 3vw, 34px);
}
.hero__sub { font-size: clamp(20px, 2.4vw, 28px); font-weight: 500; color: var(--ink); max-width: 22ch; line-height: 1.32; margin-bottom: 22px; }
.hero__body { color: var(--ink-2); font-size: clamp(16px, 1.3vw, 19px); line-height: 1.6; max-width: 56ch; text-wrap: pretty; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; margin-top: clamp(30px, 4vw, 44px); }

/* cinematic hero image */
.hero__media { margin-top: clamp(48px, 6vw, 80px); }
.ph {
  position: relative; border-radius: 4px; overflow: hidden;
  background:
    repeating-linear-gradient(135deg, transparent 0 22px, rgba(24,26,25,.05) 22px 23px),
    linear-gradient(160deg, var(--bg-2), #d7dad6);
  border: 1px solid var(--line);
  display: grid; place-items: center;
}
.ph--hero { aspect-ratio: 21 / 9; }
.ph__tag {
  font-family: var(--fm); font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-3); background: color-mix(in srgb, var(--bg) 70%, transparent);
  padding: 8px 14px; border-radius: 2px; box-shadow: inset 0 0 0 1px var(--line);
}
.ph__corner { position: absolute; top: 16px; left: 16px; font-family: var(--fm); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); }

/* ============================================================
   SECTION GRID (editorial, numbered)
   ============================================================ */
.sec { border-top: 1px solid var(--line); }
.sec__in { display: grid; grid-template-columns: var(--col) 1fr; gap: var(--gap); padding-block: clamp(56px, 7vw, 108px); align-items: start; }
.sec__aside { position: sticky; top: 100px; align-self: start; }
.sec__label { font-family: var(--fm); font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-2); line-height: 1.7; margin-top: 12px; }
.sec__tick { width: 34px; height: 2px; background: var(--line-2); margin-top: 16px; }
.sec h2 { font-size: clamp(32px, 4.6vw, 60px); margin-bottom: 26px; }
.sec h2.tight { max-width: 15ch; }

/* dark variant */
.sec--dark { background: var(--d-bg); color: var(--d-ink); border-top-color: var(--d-bg); }
.sec--dark .num { color: var(--d-rust); }
.sec--dark .sec__label { color: var(--d-ink-2); }
.sec--dark .sec__tick { background: var(--d-line); }
.sec--dark .lede { color: var(--d-ink-2); }
.sec--dark .eyebrow { color: var(--d-ink-2); }

/* ---- 02 protocol value props (in dark band) ---- */
.props { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(22px, 3vw, 40px); margin-top: clamp(40px, 5vw, 64px); }
.prop { border-top: 2px solid var(--d-rust); padding-top: 20px; }
.prop .burst { width: 30px; height: 30px; color: var(--d-rust); margin-bottom: 18px; }
.prop h3 { font-size: clamp(18px, 1.6vw, 22px); margin-bottom: 8px; }
.prop p { color: var(--d-ink-2); font-size: 15.5px; line-height: 1.55; }

/* ---- 03 why cards ---- */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(16px, 1.6vw, 22px); }
.card {
  border: 1px solid var(--line); border-radius: 4px; padding: clamp(22px, 2vw, 30px);
  background: color-mix(in srgb, #fff 45%, var(--bg)); transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -24px rgba(24,26,25,.4); border-color: var(--line-2); }
.card__n { font-family: var(--fm); font-size: 30px; font-weight: 700; color: var(--line-2); line-height: 1; margin-bottom: 22px; }
.card h3 { font-size: clamp(19px, 1.6vw, 23px); margin-bottom: 12px; line-height: 1.12; }
.card p { color: var(--ink-2); font-size: 15px; line-height: 1.55; }

/* ---- 04 how stepper ---- */
.steps { display: flex; align-items: flex-start; margin-top: 4px; margin-bottom: clamp(34px, 4vw, 48px); }
.step { flex: 1; text-align: center; position: relative; padding-top: 38px; }
.step::before { content: ""; position: absolute; top: 13px; left: 0; right: 0; height: 2px; background: var(--line); }
.step:first-child::before { left: 50%; }
.step:last-child::before { right: 50%; }
.step__dot { position: absolute; top: 4px; left: 50%; transform: translateX(-50%); width: 20px; height: 20px; border-radius: 50%; background: var(--bg); box-shadow: inset 0 0 0 2px var(--line-2); transition: box-shadow .25s, background .25s; }
.step.on .step__dot { box-shadow: inset 0 0 0 2px var(--rust); background: var(--rust-soft); }
.step__n { font-family: var(--fm); font-size: 11px; color: var(--rust); display: block; margin-bottom: 4px; }
.step__name { font-size: clamp(14px, 1.2vw, 17px); font-weight: 600; }

/* ---- 05 build list ---- */
.caps { display: grid; grid-template-columns: 1fr 1fr; column-gap: clamp(28px, 4vw, 64px); margin-top: 8px; }
.cap { display: grid; grid-template-columns: 30px 1fr; gap: 16px; align-items: baseline; padding: 22px 6px; border-top: 1px solid var(--line); position: relative; transition: padding-left .22s ease; }
.cap:hover { padding-left: 14px; }
.cap::after { content: ""; position: absolute; left: 0; top: -1px; height: calc(100% + 1px); width: 0; border-left: 2px solid var(--rust); opacity: 0; transition: opacity .2s; }
.cap:hover::after { opacity: 1; }
.cap__n { font-family: var(--fm); font-size: 12px; color: var(--ink-3); padding-top: 5px; }
.cap h3 { font-size: clamp(17px, 1.5vw, 20px); margin-bottom: 4px; }
.cap p { color: var(--ink-2); font-size: 14.5px; line-height: 1.5; }
.build__closing { margin-top: 36px; font-family: var(--fm); font-size: 14px; color: var(--ink-2); }
.build__closing b { color: var(--ink); font-weight: 700; }

/* ---- 06 ikigai diagram ---- */
.ikigai { display: grid; grid-template-columns: 1fr; gap: clamp(20px, 3vw, 30px); margin-top: 14px; }
.ik-row { display: grid; grid-template-columns: minmax(150px, 220px) 1fr; gap: clamp(20px, 3vw, 44px); align-items: center; padding: clamp(22px, 2.6vw, 34px) 0; border-top: 1px solid var(--line); }
.ik-row__k { font-size: clamp(40px, 5.5vw, 78px); font-weight: 800; letter-spacing: -0.03em; line-height: .9; }
.ik-row:nth-child(1) .ik-row__k { color: var(--rust); }
.ik-row__v { color: var(--ink-2); font-size: clamp(16px, 1.4vw, 19px); line-height: 1.5; }
.ik-row__v b { color: var(--ink); font-weight: 600; }
.ik-note { font-family: var(--fm); font-size: 13px; letter-spacing: .04em; color: var(--ink-3); padding-top: 22px; }

/* ---- 07 plan — phased delivery roadmap ---- */
.plan { margin-top: 8px; }
.plan__lede { margin-bottom: clamp(34px, 4vw, 52px); }
.phases { display: flex; align-items: stretch; }
.phase { flex: 1; position: relative; padding: 32px clamp(16px, 1.8vw, 28px) 0 0; }
/* connecting rail through node centers */
.phase::before { content: ""; position: absolute; top: 8px; left: 0; right: 0; height: 2px; background: var(--line); }
.phase:first-child::before { left: 9px; }
.phase:last-child::before { display: none; }
.phase__node { position: absolute; top: 0; left: 0; width: 18px; height: 18px; border-radius: 50%; background: var(--bg); box-shadow: inset 0 0 0 2px var(--line-2); z-index: 1; transition: box-shadow .25s, background .25s; }
.phase:hover .phase__node { box-shadow: inset 0 0 0 2px var(--rust); }
.phase__name { font-family: var(--fm); font-size: 12px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 14px; }
.phase__dur { font-size: clamp(26px, 2.7vw, 38px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.04; color: var(--ink); margin-bottom: 16px; min-height: 2.08em; }
.phase__unit { font-size: 0.5em; font-weight: 700; letter-spacing: 0; }
.phase__meter { height: 3px; background: var(--line); border-radius: 2px; margin-bottom: 18px; overflow: hidden; }
.phase__meter > span { display: block; height: 100%; width: var(--w, 20%); background: var(--rust); border-radius: 2px; transform-origin: left; }
.phase__desc { font-size: clamp(13px, 1vw, 15px); color: var(--ink-2); line-height: 1.5; max-width: 30ch; }
/* Live — the payoff phase */
.phase--live .phase__node { background: var(--rust); box-shadow: inset 0 0 0 2px var(--rust); }
.phase--live .phase__name { color: var(--rust); }
.phase--live .phase__dur { color: var(--rust); }
.phase--live .phase__meter > span { width: 100%; background: linear-gradient(90deg, var(--rust), var(--rust-soft)); }

/* ---- 08 faq accordion ---- */
.faq { margin-top: 6px; }
.faq__item { border-top: 1px solid var(--line); }
.faq__q { width: 100%; background: none; border: none; cursor: pointer; text-align: left;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 26px 4px; font-family: var(--ff); color: var(--ink); }
.faq__q h3 { font-size: clamp(18px, 1.7vw, 23px); font-weight: 600; }
.faq__sign { flex: none; width: 26px; height: 26px; position: relative; }
.faq__sign::before, .faq__sign::after { content: ""; position: absolute; background: var(--rust); border-radius: 2px; transition: transform .28s ease, opacity .2s; }
.faq__sign::before { top: 12px; left: 4px; right: 4px; height: 2px; }
.faq__sign::after { left: 12px; top: 4px; bottom: 4px; width: 2px; }
.faq__item.open .faq__sign::after { transform: scaleY(0); opacity: 0; }
.faq__a { overflow: hidden; height: 0; transition: height .32s ease; }
.faq__a-in { padding: 0 4px 30px; color: var(--ink-2); font-size: clamp(15px, 1.3vw, 17px); line-height: 1.6; max-width: 70ch; }

/* ============================================================
   FOOTER CTA
   ============================================================ */
.foot { background: var(--d-bg); color: var(--d-ink); position: relative; overflow: hidden; }
.foot__burst { position: absolute; bottom: -42%; left: 50%; transform: translateX(-50%); width: min(120vw, 1100px); aspect-ratio: 1; color: var(--d-rust); opacity: .08; pointer-events: none; }
.foot__cta { position: relative; z-index: 1; text-align: center; padding-block: clamp(80px, 11vw, 150px); }
.foot__cta .burst { width: 46px; height: 46px; color: var(--d-rust); margin: 0 auto 28px; }
.foot__cta h2 { font-size: clamp(44px, 8vw, 108px); font-weight: 800; letter-spacing: -0.035em; margin-bottom: 32px; }
.foot__btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.foot__bar { position: relative; z-index: 1; border-top: 1px solid var(--d-line); padding-block: 30px; display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.foot__bar .brand__name { color: var(--d-ink); }
.foot__links { display: flex; gap: 26px; flex-wrap: wrap; }
.foot__links a { font-size: 14px; color: var(--d-ink-2); transition: color .15s; }
.foot__links a:hover { color: var(--d-ink); }
.foot__fine { font-family: var(--fm); font-size: 12px; color: var(--d-ink-2); letter-spacing: .04em; }

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1 !important; transform: none !important; transition: none; } }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  :root { --gap: 28px; }
  .sec__in { grid-template-columns: 1fr; }
  .sec__aside { position: static; display: flex; align-items: center; gap: 16px; }
  .sec__label { margin-top: 0; }
  .sec__tick { display: none; }
  .props { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .caps { grid-template-columns: 1fr; }
  .steps { flex-direction: column; gap: 4px; }
  .step { display: flex; align-items: center; gap: 16px; text-align: left; padding-top: 0; padding-left: 34px; min-height: 46px; }
  .step::before { top: 0; bottom: 0; left: 13px; right: auto; width: 2px; height: auto; }
  .step:first-child::before { top: 50%; left: 13px; }
  .step:last-child::before { bottom: 50%; top: auto; }
  .step__dot { top: 50%; left: 4px; transform: translateY(-50%); }
  .ik-row { grid-template-columns: 1fr; gap: 8px; }
  .phases { flex-direction: column; }
  .phase { padding: 0 0 28px 30px; }
  .phase:last-child { padding-bottom: 0; }
  .phase::before { top: 0; bottom: 0; left: 8px; right: auto; width: 2px; height: auto; }
  .phase:first-child::before { left: 8px; top: 9px; }
  .phase:last-child::before { display: block; bottom: auto; height: 0; }
  .phase__meter { max-width: 220px; }
  .nav__links { display: none; }
  .nav__burger { display: inline-flex; }
}
@media (max-width: 560px) {
  body { font-size: 17px; }
}