/* Simple Genius: the Process page (/process). Four stages on one continuous spine.
   Builds on home.css tokens and the .ctr 1240px master grid.
   Scroll linked figures carry [data-gather]; js/sp.js sets --p from 0 to 1. */

.sp { --spine-l: 2px; }
.sp-h { margin: 0; font: 800 clamp(40px, 4.6vw, 72px)/0.96 var(--font-display); letter-spacing: -0.035em; text-transform: uppercase; color: inherit; text-wrap: balance; }
.sp-copy { display: grid; gap: 22px; margin-top: 56px; max-width: 34em; font-size: clamp(20px, 1.6vw, 23px); line-height: 1.5; color: var(--ink-2); }
.sp-copy .sp-copy__sub { font-size: 0.8em; line-height: 1.55; color: var(--muted); }
.sp-stage--dark .sp-copy .sp-copy__sub { color: #a9a499; }
.sp-copy p { margin: 0; }
.sp-sec { padding-block: 152px; }

/* Shared moving pulse along a drawn line (pathLength = 1) */
.sp-flow { opacity: 0; transition: opacity 600ms ease; }
.sp-flow path { fill: none; stroke: var(--yellow); stroke-width: 3; vector-effect: non-scaling-stroke; stroke-dasharray: 0.07 1; stroke-dashoffset: 1.07; }
.is-done .sp-flow { opacity: 1; }
.is-done .sp-flow path { animation: sp-flow 3.4s linear infinite; }
.is-done .sp-flow path:nth-child(2) { animation-delay: -0.9s; }
.is-done .sp-flow path:nth-child(3) { animation-delay: -1.8s; }
.is-done .sp-flow path:nth-child(4) { animation-delay: -2.6s; }
@keyframes sp-flow { from { stroke-dashoffset: 1.07; } to { stroke-dashoffset: 0; } }

/* ---------- Hero ---------- */
.sp-hero { background: var(--black); color: #fff; }
.sp-hero__in { padding-top: 156px; padding-bottom: 120px; text-align: center; }
.sp-hero__h { margin: 0; font: 800 clamp(48px, 6vw, 92px)/0.92 var(--font-display); letter-spacing: -0.045em; text-transform: uppercase; white-space: nowrap; animation: sp-up 900ms cubic-bezier(.22, 1, .36, 1) 80ms both; }
.sp-bridge { margin: 72px 0 0; display: grid; grid-template-columns: auto minmax(48px, 140px) auto minmax(48px, 140px) auto; justify-content: center; align-items: center; column-gap: 24px; text-align: left; }
.sp-bridge__pt { margin: 0; font: 800 clamp(26px, 2.9vw, 42px)/0.95 var(--font-display); letter-spacing: -0.035em; text-transform: uppercase; text-wrap: balance; }
.sp-bridge__pt--a { max-width: 5.4em; color: #8d897f; animation: sp-fade 700ms ease 450ms both; }
.sp-bridge__pt--p { max-width: 6.4em; padding: 36px 40px; background: var(--yellow); color: var(--black); font-size: clamp(34px, 4.4vw, 66px); animation: sp-up 800ms cubic-bezier(.22, 1, .36, 1) 1050ms both; }
.sp-bridge__pt--b { max-width: 5.4em; color: #fff; animation: sp-fade 700ms ease 1750ms both; }
.sp-bridge__ar { position: relative; height: 3px; background: #fff; transform-origin: left; animation: sp-draw-x 700ms cubic-bezier(.22, 1, .36, 1) 750ms both; }
.sp-bridge__ar + .sp-bridge__pt + .sp-bridge__ar { animation-delay: 1450ms; }
.sp-bridge__ar::after { content: ''; position: absolute; right: -2px; top: -6px; border-top: 7.5px solid transparent; border-bottom: 7.5px solid transparent; border-left: 12px solid #fff; }
.sp-bridge__ar i { position: absolute; top: -3px; left: 0; width: 9px; height: 9px; background: var(--yellow); opacity: 0; animation: sp-ar 2.8s ease-in-out 2.6s infinite; }
.sp-bridge__ar + .sp-bridge__pt + .sp-bridge__ar i { animation-delay: 4s; }
@keyframes sp-ar { 0% { left: 0; opacity: 0; } 15% { opacity: 1; } 70% { opacity: 1; } 85%, 100% { left: calc(100% - 12px); opacity: 0; } }
@keyframes sp-up { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: none; } }
@keyframes sp-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes sp-draw-x { from { transform: scaleX(0); } to { transform: none; } }
@keyframes sp-draw-y { from { transform: scaleY(0); } to { transform: none; } }

/* ---------- The spine and its sticky number indicator ---------- */
.sp-spine { --sp-cols: 230px minmax(0, 790px); --sp-gap: 64px; position: relative; background: var(--white); color: var(--ink); }
.sp-rail { position: absolute; inset: 0; z-index: 3; pointer-events: none; }
.sp-rail__ctr { height: 100%; display: grid; grid-template-columns: var(--sp-cols); justify-content: center; column-gap: var(--sp-gap); }
.sp-rail__in { position: sticky; top: calc(50vh - 120px); align-self: start; display: grid; grid-template-columns: 2px minmax(0, 1fr); column-gap: 28px; margin-top: 150px; }
.sp-rail__track { position: relative; background: #dcd7cc; transition: background 400ms ease; }
.sp-rail__fill { position: absolute; left: 0; top: 0; width: 100%; height: 100%; background: var(--ink); transform-origin: top; transform: scaleY(var(--fill, 0)); transition: background 400ms ease; }
.sp-rail__nums { list-style: none; margin: 0; padding: 0; }
.sp-rail__nums li { position: relative; height: 60px; display: flex; align-items: center; font: 800 20px/1 var(--font-display); letter-spacing: -0.02em; color: #c4bfb4; transform-origin: left center; transition: color 450ms ease, transform 600ms cubic-bezier(.22, 1, .36, 1); }
.sp-rail__nums li::before { content: ''; position: absolute; left: -33px; top: 50%; width: 8px; height: 8px; margin-top: -4px; background: var(--yellow); transform: scale(0); transition: transform 500ms cubic-bezier(.22, 1, .36, 1); }
.sp-rail__nums li.is-done { color: #8d897f; }
.sp-rail__nums li.is-on { color: var(--ink); transform: scale(1.7); }
.sp-rail__nums li.is-on::before { left: -19.4px; transform: scale(0.6); }
.sp-spine.is-dark .sp-rail__nums li { color: #4a4843; }
.sp-spine.is-dark .sp-rail__nums li.is-done { color: #8d897f; }
.sp-spine.is-dark .sp-rail__nums li.is-on { color: #fff; }
.sp-spine.is-dark .sp-rail__track { background: #34332f; }
.sp-spine.is-dark .sp-rail__fill { background: #fff; }

.sp-stage { position: relative; z-index: 1; padding-block: 120px; }
.sp-stage + .sp-stage:not(.sp-stage--dark) { border-top: 1px solid var(--line); }
.sp-stage--dark + .sp-stage { border-top: 0; }
.sp-stage__grid { max-width: calc(790px + var(--pad-x) * 2); }
/* Stage head: large number + headline, one composition, same width every stage, centered on the page */
.sp-head { position: relative; left: 50%; transform: translateX(-50%); width: max-content; max-width: calc(100vw - var(--pad-x) * 2);
  display: grid; grid-template-columns: 1.3em auto; column-gap: 0.42em; align-items: center; font-size: clamp(38px, 3.9vw, 58px); }
.sp-head__n { font: 800 2.45em/0.74 var(--font-display); letter-spacing: -0.06em; color: var(--ink); text-align: left; }
.sp-head .sp-h { font-size: 1em; max-width: 12.4em; }
.sp-stage--dark .sp-head__n { color: #fff; }
.sp-stage--dark { background: var(--black); color: #fff; padding-block: 144px; }
.sp-stage--dark .sp-copy { color: #cfcac0; }
.sp-stage[data-stage="02"] { padding-bottom: 120px; }
.sp-stage--last { overflow-x: clip; }

/* ---------- 01 Everything flows into a conversation ---------- */
.sp-ctx { --p: 0; margin: 64px 0 0; display: grid; grid-template-columns: auto minmax(60px, 240px) auto; justify-content: center; align-items: center; }
.sp-ctx__in { list-style: none; margin: 0; padding: 0; display: grid; grid-template-rows: repeat(4, 84px); }
.sp-ctx__in li { white-space: nowrap; display: flex; align-items: center; font: 800 clamp(24px, 2.4vw, 36px)/1 var(--font-display); letter-spacing: -0.025em; text-transform: uppercase;
  opacity: calc(0.25 + 0.75 * var(--p)); transform: translate(calc((1 - var(--p)) * var(--sx, -56px)), calc((1 - var(--p)) * var(--dy, 0px))); }
.sp-ctx__in li:nth-child(1) { --dy: -34px; }
.sp-ctx__in li:nth-child(2) { --dy: -12px; }
.sp-ctx__in li:nth-child(3) { --dy: 12px; }
.sp-ctx__in li:nth-child(4) { --dy: 34px; }
.sp-ctx__lines { width: 100%; height: 336px; overflow: visible; }
.sp-ctx__base path { fill: none; stroke: var(--ink); stroke-width: 2; vector-effect: non-scaling-stroke; stroke-dasharray: 1; stroke-dashoffset: calc(1 - clamp(0, (var(--p) - 0.25) * 1.6, 1)); }
.sp-ctx__out { margin: 0; padding: 20px 26px; background: var(--ink); color: #fff; font: 800 clamp(26px, 2.6vw, 40px)/1 var(--font-display); letter-spacing: -0.02em; text-transform: uppercase; white-space: nowrap;
  opacity: clamp(0, (var(--p) - 0.6) * 2.6, 1); transform: scale(calc(0.92 + 0.08 * var(--p))); transform-origin: left center; }
.sp-ctx__out::before { content: ''; display: inline-block; width: 10px; height: 10px; margin-right: 14px; vertical-align: 0.2em; background: var(--yellow); }

/* ---------- 02 Scattered information settles into one environment ---------- */
.sp-env { --p: 0; position: relative; height: 640px; margin: 64px 0 0; }
.sp-env__lines { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.sp-env__lines > path { fill: none; stroke: var(--ink); stroke-width: 2; vector-effect: non-scaling-stroke; stroke-dasharray: 1; stroke-dashoffset: calc(1 - clamp(0, (var(--p) - 0.45) * 1.9, 1)); }
.sp-env__lines--m { display: none; }
.sp-env__w { --ax: -4px; position: absolute; z-index: 1;
  left: calc(var(--x0) + (var(--x1) - var(--x0)) * var(--p));
  top: calc(var(--y0) + (var(--y1) - var(--y0)) * var(--p));
  transform: translate(calc(var(--ax) * var(--p)), -50%) rotate(calc(var(--r0) * (1 - var(--p))));
  white-space: nowrap; font: 700 clamp(12px, 1vw, 14px)/1 var(--font-body); letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink); opacity: calc(0.4 + 0.6 * var(--p)); }
.sp-env__w::before, .sp-env__w--l::after { content: ''; display: inline-block; width: 8px; height: 8px; vertical-align: 0.06em; background: var(--ink); }
.sp-env__w::before { margin-right: 14px; }
.sp-env__w--l { --ax: calc(-100% + 4px); }
.sp-env__w--l::before { display: none; }
.sp-env__w--l::after { margin-left: 14px; }
.sp-env__box { position: absolute; left: 50%; top: 80%; margin: 0; width: min(460px, 84%); padding: 24px 28px; background: var(--ink); color: #fff; text-align: center;
  font: 800 clamp(22px, 2.2vw, 32px)/1.02 var(--font-display); letter-spacing: -0.02em; text-transform: uppercase; text-wrap: balance;
  opacity: clamp(0, (var(--p) - 0.72) * 3.6, 1); transform: translate(-50%, calc((1 - var(--p)) * 24px)); }
.sp-env__box::before { content: ''; position: absolute; left: 50%; top: -5px; width: 10px; height: 10px; margin-left: -5px; background: var(--yellow); }
/* start (x0, y0, r0) then settled (x1, y1). Left column settles against 46%, right against 54%. */
.sp-env__w:nth-of-type(1)  { --x0: 2%;  --y0: 7%;  --r0: -6deg; --x1: 46%; --y1: 5%; }
.sp-env__w:nth-of-type(2)  { --x0: 36%; --y0: 3%;  --r0: 4deg;  --x1: 46%; --y1: 15.5%; }
.sp-env__w:nth-of-type(3)  { --x0: 60%; --y0: 14%; --r0: -3deg; --x1: 46%; --y1: 26%; }
.sp-env__w:nth-of-type(4)  { --x0: 12%; --y0: 22%; --r0: 5deg;  --x1: 46%; --y1: 36.5%; }
.sp-env__w:nth-of-type(5)  { --x0: 48%; --y0: 30%; --r0: -5deg; --x1: 46%; --y1: 47%; }
.sp-env__w:nth-of-type(6)  { --x0: 3%;  --y0: 39%; --r0: 3deg;  --x1: 46%; --y1: 57.5%; }
.sp-env__w:nth-of-type(7)  { --x0: 64%; --y0: 41%; --r0: 6deg;  --x1: 54%; --y1: 5%; }
.sp-env__w:nth-of-type(8)  { --x0: 28%; --y0: 49%; --r0: -4deg; --x1: 54%; --y1: 15.5%; }
.sp-env__w:nth-of-type(9)  { --x0: 56%; --y0: 57%; --r0: 4deg;  --x1: 54%; --y1: 26%; }
.sp-env__w:nth-of-type(10) { --x0: 8%;  --y0: 63%; --r0: -6deg; --x1: 54%; --y1: 36.5%; }
.sp-env__w:nth-of-type(11) { --x0: 40%; --y0: 69%; --r0: 3deg;  --x1: 54%; --y1: 47%; }
.sp-env__w:nth-of-type(12) { --x0: 62%; --y0: 75%; --r0: -3deg; --x1: 54%; --y1: 57.5%; }

/* ---------- 03 Your business plus the goal becomes your Process ---------- */
.sp-lede { margin: 28px 0 0; max-width: 24em; font: 500 clamp(21px, 1.8vw, 27px)/1.4 var(--font-display); color: #fff; }
.sp-build { --p: 0; margin: 64px 0 0; text-align: center; }
.sp-build__in { display: grid; grid-template-columns: 1fr 1fr; }
.sp-build__src { display: flex; align-items: center; justify-content: center; margin: 0 14px; padding: 22px 16px; border: 2px solid #fff; font: 800 clamp(20px, 2vw, 30px)/1 var(--font-display); letter-spacing: -0.02em; text-transform: uppercase; color: #fff;
  opacity: calc(0.3 + 0.7 * var(--p)); transform: translateX(calc((1 - var(--p)) * var(--sx))); }
.sp-build__src--a { --sx: -40px; }
.sp-build__src--b { --sx: 40px; }
.sp-build__merge { display: block; width: 100%; height: 120px; overflow: visible; }
.sp-build__merge > path { fill: none; stroke: #fff; stroke-width: 2; vector-effect: non-scaling-stroke; stroke-dasharray: 1; stroke-dashoffset: calc(1 - clamp(0, (var(--p) - 0.2) * 1.8, 1)); }
.sp-build__proc { margin: 0 auto; max-width: 660px; padding: 40px 44px 30px; background: var(--yellow); color: var(--black);
  opacity: clamp(0, (var(--p) - 0.55) * 3, 1); transform: scale(calc(0.94 + 0.06 * var(--p))); }
.sp-build__name { margin: 0; font: 800 clamp(34px, 4vw, 60px)/0.94 var(--font-display); letter-spacing: -0.035em; text-transform: uppercase; text-wrap: balance; }
.sp-build__for { margin: 26px 0 0; padding: 20px 0 0; border-top: 2px solid var(--black); font: 700 14px/1.2 var(--font-body); letter-spacing: 0.14em; text-transform: uppercase; }
.sp-build__out { list-style: none; margin: 0; padding: 0; }
.sp-build__out li { position: relative; padding-top: 104px; font: 800 clamp(32px, 3.6vw, 56px)/0.95 var(--font-display); letter-spacing: -0.035em; text-transform: uppercase; color: #fff;
  opacity: clamp(0, (var(--p) - 0.8) * 6, 1); }
.sp-build__out li + li { opacity: clamp(0, (var(--p) - 0.88) * 9, 1); }
.sp-build__out li:last-child { color: var(--yellow); }
.sp-build__out li::before { content: ''; position: absolute; left: 50%; top: 20px; width: 2px; height: 58px; margin-left: -1px; background: #6f6c64; }
.sp-build__out li::after { content: ''; position: absolute; left: 50%; top: 76px; margin-left: -7px; border-left: 7px solid transparent; border-right: 7px solid transparent; border-top: 11px solid #6f6c64; }

/* ---------- 04 You execute, Simple Genius stays connected ---------- */
.sp-pair { margin: 64px 0 0; display: grid; grid-template-columns: auto minmax(80px, 1fr) auto; align-items: center; column-gap: 28px; }
.sp-pair__who { margin: 0; font: 800 clamp(30px, 3.2vw, 48px)/1 var(--font-display); letter-spacing: -0.03em; text-transform: uppercase; color: var(--ink); white-space: nowrap; }
.sp-pair__do { margin: 14px 0 0; font: 700 13px/1 var(--font-body); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); white-space: nowrap; }
.sp-pair__side--sg { text-align: right; }
.sp-pair__link { position: relative; height: 2px; background: var(--ink); transform-origin: left; }
.sp-pair__link::before, .sp-pair__link::after { content: ''; position: absolute; top: -3px; width: 8px; height: 8px; border-radius: 50%; background: var(--ink); }
.sp-pair__link::before { left: -4px; }
.sp-pair__link::after { right: -4px; }
.sp-pair__icon { position: absolute; left: 50%; top: 50%; z-index: 1; display: grid; place-items: center; width: 40px; height: 40px; margin: -20px 0 0 -20px; border: 1.5px solid var(--ink); border-radius: 50%; background: var(--white); color: var(--ink); }
.sp-pair__dot { position: absolute; top: -2px; left: 8%; width: 6px; height: 6px; border-radius: 50%; background: var(--ink); opacity: 0; }
.sp-pair.is-in .sp-pair__dot { animation: sp-pair 3.2s ease-in-out 1.2s infinite; }
.sp-pair.is-in .sp-pair__dot--r { animation-name: sp-pair-r; animation-delay: 2.8s; }
@keyframes sp-pair { 0% { left: 6%; opacity: 0; } 12% { opacity: 1; } 80% { opacity: 1; } 92%, 100% { left: calc(94% - 6px); opacity: 0; } }
@keyframes sp-pair-r { 0% { left: calc(94% - 6px); opacity: 0; } 12% { opacity: 1; } 80% { opacity: 1; } 92%, 100% { left: 6%; opacity: 0; } }

.sp-run { position: relative; margin-top: 88px; }
.sp-run::before { content: ''; position: absolute; left: 0; top: 7px; height: 3px;
  right: calc(-1 * (var(--pad-x) + max(0px, (100vw - 1240px - var(--pad-x) * 2) / 2)));
  background: linear-gradient(90deg, var(--ink) 0 70%, rgba(18, 17, 15, 0)); transform-origin: left; }
.sp-run::after { content: ''; position: absolute; top: 3px; left: 0; width: 11px; height: 11px; background: var(--yellow); opacity: 0; }
.sp-run.is-in::after { animation: sp-run 7s linear 1.8s infinite; }
@keyframes sp-run { 0% { left: 0; opacity: 0; } 8% { opacity: 1; } 85% { opacity: 1; } 100% { left: 110%; opacity: 0; } }
.sp-run__row { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(0, 1.4fr); }
.sp-run__row li { position: relative; padding-top: 48px; font: 800 clamp(22px, 2.3vw, 36px)/1 var(--font-display); letter-spacing: -0.03em; text-transform: uppercase; color: var(--ink); white-space: nowrap; }
.sp-run__row li::before { content: ''; position: absolute; left: 0; top: 0; width: 17px; height: 17px; background: var(--ink); }
.sp-run__go::before { background: var(--yellow) !important; box-shadow: 0 0 0 2px var(--ink) inset; }
.sp-run__go::after { content: ' →'; color: var(--yellow-2); }
.sp-close4 { margin: 120px 0 0; max-width: 16em; font: 800 clamp(30px, 3.2vw, 48px)/1.02 var(--font-display); letter-spacing: -0.03em; text-transform: uppercase; color: var(--ink); text-wrap: balance; }
.sp-close4 + .sp-copy { margin-top: 24px; }

/* ---------- Closing ---------- */
.sp-end { background: var(--white); border-top: 1px solid var(--line); padding-block: 96px !important; }
@media (max-width: 640px) { .sp-end { padding-block: 64px !important; } }
.sp-end__in { text-align: center; }
.sp-full__big { margin: 0 auto; max-width: 15em; font: 800 clamp(40px, 5vw, 76px)/0.95 var(--font-display); letter-spacing: -0.04em; text-transform: uppercase; color: var(--ink); text-wrap: balance; }
.sp-end__sub { margin: 32px auto 0; max-width: 36em; font-size: clamp(18px, 1.4vw, 20px); line-height: 1.6; color: var(--ink-2); }

/* ---------- Reveal on scroll (only when JS is running) ---------- */
.sp-js .sp-pair__side { opacity: 0; transform: translateY(14px); transition: opacity 700ms ease, transform 700ms cubic-bezier(.22, 1, .36, 1); }
.sp-js .sp-pair__side--sg { transition-delay: 600ms; }
.sp-js .sp-pair__link { transform: scaleX(0); transition: transform 900ms cubic-bezier(.22, 1, .36, 1) 250ms; }
.sp-js .sp-pair.is-in .sp-pair__side { opacity: 1; transform: none; }
.sp-js .sp-pair.is-in .sp-pair__link { transform: none; }
.sp-js .sp-run__row li { opacity: 0; transform: translateY(16px); transition: opacity 700ms ease calc(var(--i) * 280ms), transform 700ms cubic-bezier(.22, 1, .36, 1) calc(var(--i) * 280ms); }
.sp-js .sp-run::before { transform: scaleX(0); transition: transform 1600ms cubic-bezier(.22, 1, .36, 1); }
.sp-js .is-in .sp-run__row li { opacity: 1; transform: none; }
.sp-js .sp-run.is-in::before { transform: none; }

@media (prefers-reduced-motion: reduce) {
  .sp *, .sp *::before, .sp *::after { animation: none !important; transition: none !important; }
  .sp-js .sp .sp-pair__side, .sp-js .sp .sp-run__row li { opacity: 1 !important; transform: none !important; }
  .sp-js .sp .sp-pair__link, .sp-js .sp .sp-run::before { transform: none !important; }
  .sp-flow, .sp-run::after, .sp-pair__dot, .sp-bridge__ar i { display: none !important; }
  .sp [data-gather] { --p: 1 !important; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .sp-sec, .sp-stage { padding-block: 120px; }
  .sp-stage--dark { padding-block: 144px; }
  .sp-spine { --sp-cols: 150px minmax(0, 1fr); --sp-gap: 40px; }
  .sp-bridge { column-gap: 16px; grid-template-columns: auto minmax(40px, 100px) auto minmax(40px, 100px) auto; }
  .sp-bridge__pt--p { padding: 26px 28px; }
  .sp-env__w { font-size: 12px; letter-spacing: 0.08em; }
  .sp-env__w::before { margin-right: 10px; }
  .sp-env__w--l::after { margin-left: 10px; }
}
@media (max-width: 900px) {
  .sp-sec, .sp-stage { padding-block: 96px; }
  .sp-stage--dark { padding-block: 112px; }
  .sp-hero__in { padding-top: 132px; padding-bottom: 88px; }
  .sp-hero__h { white-space: normal; }
  .sp-rail { display: none; }
  .sp-stage__grid { display: block; }
  .sp-bridge { grid-template-columns: 1fr; justify-items: center; text-align: center; margin-top: 56px; }
  .sp-bridge__pt { font-size: clamp(30px, 7.4vw, 48px); max-width: none; }
  .sp-bridge__pt--p { font-size: clamp(34px, 9vw, 56px); max-width: 7em; }
  .sp-bridge__ar { width: 3px; height: 56px; margin: 18px 0; transform-origin: top; animation-name: sp-draw-y; }
  .sp-bridge__ar::after { right: -6px; top: auto; bottom: -2px; border-left: 7.5px solid transparent; border-right: 7.5px solid transparent; border-top: 12px solid #fff; border-bottom: 0; }
  .sp-bridge__ar i { display: none; }
  .sp-run { margin-top: 72px; padding-bottom: 8px; }
  .sp-run::before { left: 7px; right: auto; top: 0; bottom: 0; width: 3px; height: auto; background: linear-gradient(180deg, var(--ink) 0 78%, rgba(18, 17, 15, 0)); transform-origin: top; }
  .sp-js .sp-run::before { transform: scaleY(0); }
  .sp-run::after, .sp-run.is-in::after { display: none; }
  .sp-run__row { grid-template-columns: 1fr; row-gap: 40px; }
  .sp-run__row li { padding: 0 0 0 44px; }
  .sp-run__row li::before { top: 0.2em; left: 0; }
  .sp-close4 { margin-top: 88px; }
}
@media (max-width: 600px) {
  .sp-sec, .sp-stage { padding-block: 80px; }
  .sp-stage--dark { padding-block: 88px; }
  .sp-hero__in { padding-top: 116px; padding-bottom: 72px; }
  .sp-hero__h { font-size: clamp(44px, 12.4vw, 60px); }
  .sp-bridge__pt--p { padding: 22px 24px; }
  .sp-h { font-size: clamp(34px, 9.6vw, 44px); }
  .sp-head { left: 0; transform: none; width: auto; max-width: none; grid-template-columns: 1.2em minmax(0, 1fr); column-gap: 0.36em; font-size: clamp(30px, 8.4vw, 40px); }
  .sp-head__n { font-size: 2.2em; }
  .sp-copy { margin-top: 44px; }
  .sp-ctx { grid-template-columns: minmax(0, 1fr) 36px auto; margin-top: 56px; }
  .sp-ctx__in { grid-template-rows: repeat(4, 64px); }
  .sp-ctx__in li { font-size: 18px; --sx: 0px; }
  .sp-ctx__lines { height: 256px; }
  .sp-ctx__out { padding: 12px 12px; font-size: 16px; line-height: 1.05; white-space: normal; font-size: 15px; }
  .sp-ctx__out::before { display: none; }
  .sp-env { height: 700px; margin-top: 56px; }
  .sp-env__lines--d { display: none; }
  .sp-env__lines--m { display: block; }
  .sp-env__w, .sp-env__w--l { --ax: -4px; font-size: 12px; letter-spacing: 0.08em; }
  .sp-env__w--l::before { display: inline-block; }
  .sp-env__w--l::after { display: none; }
  .sp-env__box { top: 85%; width: 100%; padding: 18px 16px; font-size: 20px; }
  .sp-env__w:nth-of-type(1)  { --x0: 2%;  --y0: 4%;  --x1: 4%; --y1: 3%; }
  .sp-env__w:nth-of-type(2)  { --x0: 18%; --y0: 10%; --x1: 4%; --y1: 9.3%; }
  .sp-env__w:nth-of-type(3)  { --x0: 34%; --y0: 17%; --x1: 4%; --y1: 15.6%; }
  .sp-env__w:nth-of-type(4)  { --x0: 6%;  --y0: 23%; --x1: 4%; --y1: 21.9%; }
  .sp-env__w:nth-of-type(5)  { --x0: 44%; --y0: 29%; --x1: 4%; --y1: 28.2%; }
  .sp-env__w:nth-of-type(6)  { --x0: 2%;  --y0: 35%; --x1: 4%; --y1: 34.5%; }
  .sp-env__w:nth-of-type(7)  { --x0: 50%; --y0: 41%; --x1: 4%; --y1: 40.8%; }
  .sp-env__w:nth-of-type(8)  { --x0: 16%; --y0: 47%; --x1: 4%; --y1: 47.1%; }
  .sp-env__w:nth-of-type(9)  { --x0: 46%; --y0: 54%; --x1: 4%; --y1: 53.4%; }
  .sp-env__w:nth-of-type(10) { --x0: 4%;  --y0: 60%; --x1: 4%; --y1: 59.7%; }
  .sp-env__w:nth-of-type(11) { --x0: 38%; --y0: 67%; --x1: 4%; --y1: 66%; }
  .sp-env__w:nth-of-type(12) { --x0: 10%; --y0: 74%; --x1: 4%; --y1: 72.3%; }
  .sp-lede { font-size: 20px; }
  .sp-build { margin-top: 56px; }
  .sp-build__src--a { --sx: -10px; }
  .sp-build__src--b { --sx: 10px; }
  .sp-build__src { margin: 0 6px; padding: 16px 8px; font-size: 16px; }
  .sp-build__src--b::before { display: none; }
  .sp-build__merge { height: 80px; }
  .sp-build__proc { padding: 28px 20px 22px; }
  .sp-build__name { font-size: clamp(30px, 8.6vw, 38px); }
  .sp-build__for { gap: 10px 18px; }
  .sp-build__for { font-size: 12px; letter-spacing: 0.12em; }
  .sp-build__out li { font-size: clamp(28px, 8vw, 36px); padding-top: 88px; }
  .sp-build__out li::before { height: 46px; }
  .sp-build__out li::after { top: 64px; }
  .sp-pair { grid-template-columns: 1fr; row-gap: 0; margin-top: 56px; }
  .sp-pair__side--sg { text-align: left; }
  .sp-pair__link { width: 2px; height: 96px; margin: 22px 0 22px 12px; transform-origin: top; }
  .sp-js .sp-pair__link { transform: scaleY(0); }
  .sp-pair__link::before, .sp-pair__link::after { left: -3px; right: auto; }
  .sp-pair__link::before { top: -4px; }
  .sp-pair__link::after { top: auto; bottom: -4px; }
  .sp-pair__icon { left: 1px; }
  .sp-pair__dot { display: none; }
  .sp-full__big { font-size: clamp(34px, 9.6vw, 44px); }
}

/* ---------- Desktop: every stage fits in one screen ---------- */
@media (min-width: 901px) {
  .sp-stage, .sp-stage--dark, .sp-stage[data-stage="02"] { min-height: calc(100vh - 72px); min-height: calc(100svh - 72px); padding-block: 40px; display: flex; align-items: center; }
  .sp-stage__grid { width: 100%; max-width: calc(1180px + var(--pad-x) * 2); }
  .sp-stage__body { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); column-gap: 72px; row-gap: 44px; align-items: center; }
  .sp-head { grid-column: 1 / -1; font-size: clamp(34px, 3.3vw, 50px); }
  .sp-stage__body > figure { grid-column: 1; margin: 0; }
  .sp-stage__body > .sp-copy { grid-column: 2; margin: 0; max-width: none; font-size: clamp(18px, 1.35vw, 21px); gap: 18px; }

  /* 01 */
  .sp-ctx { grid-template-columns: auto minmax(40px, 140px) auto; }
  .sp-ctx__in { grid-template-rows: repeat(4, 70px); }
  .sp-ctx__in li { font-size: clamp(20px, 1.9vw, 28px); }
  .sp-ctx__lines { height: 280px; }
  .sp-ctx__out { padding: 16px 20px; font-size: clamp(20px, 1.9vw, 28px); }

  /* 02 */
  .sp-env { height: 430px; }
  .sp-env__w { font-size: 12px; letter-spacing: 0.08em; }
  .sp-env__w::before { margin-right: 10px; }
  .sp-env__w--l::after { margin-left: 10px; }
  .sp-env__box { top: 78%; width: min(400px, 84%); padding: 18px 22px; font-size: clamp(18px, 1.7vw, 24px); }

  /* 03 */
  .sp-build__src { padding: 16px 12px; font-size: clamp(16px, 1.5vw, 22px); }
  .sp-build__merge { height: 84px; }
  .sp-build__proc { padding: 24px 28px 20px; }
  .sp-build__name { font-size: clamp(26px, 2.5vw, 38px); }
  .sp-build__for { margin-top: 16px; padding-top: 14px; font-size: 12px; }
  .sp-build__out li { padding-top: 52px; font-size: clamp(22px, 2.1vw, 32px); }
  .sp-build__out li::before { top: 10px; height: 26px; }
  .sp-build__out li::after { top: 34px; }

  /* 04 */
  .sp-stage--last .sp-stage__body { grid-template-rows: auto auto auto; }
  .sp-stage--last .sp-pair { grid-row: 2; align-self: end; column-gap: 20px; }
  .sp-stage--last .sp-run { grid-column: 1; grid-row: 3; align-self: start; margin-top: 16px; }
  .sp-stage--last .sp-copy { grid-row: 2 / 4; }
  .sp-pair__who { font-size: clamp(24px, 2.3vw, 34px); }
  .sp-pair__do { font-size: 12px; }
  .sp-run::before { right: 0; }
  .sp-run__row li { padding-top: 40px; font-size: clamp(18px, 1.6vw, 24px); }
}
@media (min-width: 901px) and (max-width: 1100px) { .sp-head .sp-h { max-width: 13.6em; } }
.sp-build.is-done .sp-build__merge > path { stroke-dasharray: none; stroke-dashoffset: 0; }

/* ---------- Desktop refinement: tighter stages, supporting copy in a panel ---------- */
@media (min-width: 901px) {
  .sp-stage, .sp-stage--dark, .sp-stage[data-stage="02"] { min-height: 0; padding-block: 88px; }
  .sp-stage__body > .sp-copy { align-self: center; position: relative; padding: 36px 40px 38px; background: #fff; border: 1px solid var(--line); border-top: 4px solid var(--yellow); font-size: clamp(19px, 1.5vw, 22px); line-height: 1.55; color: var(--ink); box-shadow: 0 24px 48px -32px rgba(18, 17, 15, 0.28); }
  .sp-stage--dark .sp-stage__body > .sp-copy { background: #161513; border-color: #2c2b27; border-top-color: var(--yellow); color: #e9e5dc; box-shadow: none; }
  .sp-stage__body > .sp-copy .sp-copy__sub { padding-top: 18px; border-top: 1px solid var(--line); font-size: 0.78em; }
  .sp-env { height: 380px; }
  .sp-env__box { top: 80%; }
  .sp-stage--last .sp-stage__body { row-gap: 64px; }
  .sp-stage--last .sp-pair { align-self: end; }
}

/* ---------- Mobile: each stage fits in one screen ---------- */
@media (max-width: 600px) {
  .sp-stage, .sp-stage--dark, .sp-stage[data-stage="02"] { min-height: 0; padding-block: 44px; }
  .sp-stage__grid { width: 100%; }
  .sp-head { font-size: clamp(24px, 7vw, 30px); grid-template-columns: 1.1em minmax(0, 1fr); column-gap: 0.34em; }
  .sp-head__n { font-size: 2em; }
  .sp-copy { margin-top: 22px; gap: 12px; font-size: 16px; line-height: 1.5; padding: 18px 18px 20px; background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--yellow); color: var(--ink); }
  .sp-stage--dark .sp-copy { background: #161513; border-color: #2c2b27; border-top-color: var(--yellow); color: #e9e5dc; }
  .sp-copy .sp-copy__sub { padding-top: 12px; border-top: 1px solid var(--line); font-size: 14px; }

  /* 01 */
  .sp-ctx { margin-top: 26px; grid-template-columns: minmax(0, 1fr) 30px auto; }
  .sp-ctx__in { grid-template-rows: repeat(4, 42px); }
  .sp-ctx__in li { font-size: 16px; }
  .sp-ctx__lines { height: 168px; }
  .sp-ctx__out { padding: 10px 10px; font-size: 14px; }

  /* 02 */
  .sp-env { height: 330px; margin-top: 24px; }
  .sp-env__w, .sp-env__w--l { font-size: 10.5px; letter-spacing: 0.07em; }
  .sp-env__box { top: 84%; padding: 12px 14px; font-size: 16px; }

  /* 03 */
  .sp-build { margin-top: 24px; }
  .sp-build__src { padding: 10px 6px; font-size: 13px; border-width: 1.5px; }
  .sp-build__merge { height: 40px; }
  .sp-build__proc { padding: 16px 16px 12px; }
  .sp-build__name { font-size: 22px; }
  .sp-build__for { margin-top: 10px; padding-top: 10px; font-size: 10px; }
  .sp-build__out li { padding-top: 38px; font-size: 20px; }
  .sp-build__out li::before { top: 8px; height: 18px; }
  .sp-build__out li::after { top: 24px; border-left-width: 5px; border-right-width: 5px; border-top-width: 8px; margin-left: -5px; }

  /* 04: horizontal pair and horizontal run */
  .sp-pair { margin-top: 28px; grid-template-columns: auto minmax(44px, 1fr) auto; column-gap: 12px; row-gap: 0; align-items: start; }
  .sp-pair__side--sg { text-align: right; }
  .sp-pair__who { font-size: clamp(18px, 5.6vw, 22px); }
  .sp-pair__do { margin-top: 8px; font-size: 9.5px; letter-spacing: 0.08em; white-space: normal; max-width: 9em; line-height: 1.25; }
  .sp-pair__side--sg .sp-pair__do { margin-left: auto; }
  .sp-pair__link { width: auto; height: 2px; margin: 10px 0 0; transform-origin: left; }
  .sp-js .sp-pair__link { transform: scaleX(0); }
  .sp-js .is-in .sp-pair__link, .sp-js .sp-pair.is-in .sp-pair__link { transform: none; }
  .sp-pair__link::before, .sp-pair__link::after { top: -3px; bottom: auto; }
  .sp-pair__link::before { left: -4px; right: auto; }
  .sp-pair__link::after { right: -4px; left: auto; }
  .sp-pair__icon { left: 50%; width: 30px; height: 30px; margin: -15px 0 0 -15px; }
  .sp-pair__icon svg { width: 14px; height: 14px; }
  .sp-pair__dot { display: block; }
  .sp-run { margin-top: 30px; padding-bottom: 0; }
  .sp-run::before { left: 0; right: 0; top: 6px; bottom: auto; width: auto; height: 2px; background: linear-gradient(90deg, var(--ink) 0 80%, rgba(18, 17, 15, 0)); transform-origin: left; }
  .sp-js .sp-run::before { transform: scaleX(0); }
  .sp-js .sp-run.is-in::before { transform: none; }
  .sp-run::after { display: block; top: 2px; width: 10px; height: 10px; }
  .sp-run.is-in::after { display: block; animation: sp-run 7s linear 1.8s infinite; }
  .sp-run__row { grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(0, 1.25fr); row-gap: 0; }
  .sp-run__row li { padding: 26px 4px 0 0; font-size: clamp(13px, 4vw, 16px); white-space: normal; line-height: 1.05; }
  .sp-run__row li::before { top: 0; left: 0; width: 14px; height: 14px; }
}
@media (max-width: 600px) and (max-height: 700px) {
  .sp-env { height: 290px; }
  .sp-stage, .sp-stage--dark, .sp-stage[data-stage="02"] { padding-block: 32px; }
}