/* Landing, Academy and chapter pages: scroll-driven, large type, generous space. */
:root { --ease: cubic-bezier(.16, 1, .3, 1); --page-h: calc(100dvh - 52px); }

.page { position: fixed; inset: 52px 0 0 0; z-index: 40; overflow-y: auto; overflow-x: hidden; background: var(--bg); overscroll-behavior: contain; }
.page[hidden] { display: none; }
.page.enter > * { animation: pageIn .7s var(--ease) both; }
@keyframes pageIn { from { opacity: 0; transform: translate3d(0, 14px, 0); } }
a.btn { text-decoration: none; color: inherit; }
a.btn-primary { color: var(--surface); }
.btn-lg { height: 46px; padding: 0 24px; font-size: 14.5px; border-radius: 23px; font-weight: 500; }
.eyebrow { display: block; font: 500 12.5px var(--sans); letter-spacing: .01em; color: var(--accent); margin: 0 0 18px; }

/* ---------- reveal primitives ---------- */
[data-reveal] { opacity: 0; transform: translate3d(0, 30px, 0); filter: blur(6px); transition: opacity 1s var(--ease) var(--d, 0s), transform 1.2s var(--ease) var(--d, 0s), filter 1s var(--ease) var(--d, 0s); }
[data-reveal].in { opacity: 1; transform: none; filter: none; }
.split .w { display: inline-block; overflow: hidden; vertical-align: top; padding: 0 .02em .1em; margin-bottom: -.1em; }
.split .w > span { display: inline-block; transform: translate3d(0, 108%, 0); transition: transform 1.15s var(--ease) calc(var(--i) * 65ms); }
.split.in .w > span { transform: none; }
.scroll-cue { position: absolute; left: 50%; bottom: 30px; width: 22px; height: 36px; margin-left: -11px; border: 1.5px solid var(--rule-strong); border-radius: 12px; transition: opacity .4s; }
.scroll-cue span { position: absolute; left: 50%; top: 7px; width: 3px; height: 7px; margin-left: -1.5px; border-radius: 2px; background: var(--muted); animation: cue 1.8s var(--ease) infinite; }
@keyframes cue { 0% { transform: translateY(0); opacity: 0; } 30% { opacity: 1; } 80% { transform: translateY(12px); opacity: 0; } 100% { opacity: 0; } }
.viz { position: absolute; inset: 0; display: block; }

/* ---------- landing ---------- */
.lp .sticky { position: sticky; top: 0; height: var(--page-h); overflow: hidden; }
.lp-hero { height: 190vh; position: relative; }
.lp-hero-viz { position: absolute; inset: 0; }
.lp-hero-copy { position: relative; z-index: 2; max-width: 1180px; margin: 0 auto; padding: 13vh 40px 0; will-change: transform, opacity; }
.lp-hero h1 { font: 600 clamp(46px, 8.6vw, 120px)/.96 var(--serif); letter-spacing: -.038em; margin: 0 0 36px; max-width: 10.5ch; }
.lp-cta { display: flex; gap: 12px; flex-wrap: wrap; }

.lp-hundred { height: 360vh; position: relative; }
.lp-hundred .sticky { display: grid; grid-template-rows: auto minmax(0, 1fr) auto; max-width: 1240px; margin: 0 auto; padding: 9vh 40px 20px; }
.lp-hundred h2 { font: 600 clamp(28px, 4.2vw, 54px)/1.04 var(--serif); letter-spacing: -.022em; margin: 0; }
.big-num { font: 500 clamp(54px, 10.5vw, 148px)/1 var(--mono); letter-spacing: -.055em; color: var(--accent); font-variant-numeric: tabular-nums; margin: 14px 0 10px; }
.sub-num { display: flex; align-items: center; gap: 12px; margin: 0 0 18px; color: var(--muted); font: 14px var(--mono); }
.sub-num .sep { width: 4px; height: 4px; border-radius: 50%; background: var(--rule-strong); }
.lp-hundred-viz { position: relative; min-height: 0; }
.fine { font-size: 11.5px; color: var(--faint); margin: 10px 0 0; }

.lp-section { max-width: 1180px; margin: 0 auto; padding: 20vh 40px 0; }
.lp-title { font: 600 clamp(38px, 6.2vw, 84px)/1 var(--serif); letter-spacing: -.034em; margin: 0 0 56px; max-width: 13ch; }
.lp-lede { font: 19px/1.5 var(--serif); color: var(--ink-2); max-width: 560px; margin: -28px 0 48px; }
.lp-h3 { font: 600 20px/1.2 var(--serif); margin: 0 0 12px; }

.paths { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.path { display: flex; flex-direction: column; gap: 8px; padding: 34px 34px 30px; border-radius: 24px; background: var(--surface); border: 1px solid var(--rule); color: inherit; text-decoration: none; min-height: 380px; }
.path:hover { border-color: var(--rule-strong); box-shadow: var(--shadow); }
.path:hover .mini { transform: scale(1.03); }
.mini { width: 100%; height: 150px; margin-bottom: 22px; transition: transform .8s var(--ease); overflow: visible; }
.mini-growth .ln { fill: none; stroke: var(--accent); stroke-width: 3; stroke-linecap: round; stroke-dasharray: 300; stroke-dashoffset: 300; transition: stroke-dashoffset 2s var(--ease) .35s; }
.mini-growth .area { fill: var(--accent); opacity: 0; transition: opacity 1.4s ease 1s; }
.mini-growth circle { fill: var(--accent); opacity: 0; transition: opacity .5s ease 1.9s; }
.path.in .mini-growth .ln { stroke-dashoffset: 0; }
.path.in .mini-growth .area { opacity: .13; }
.path.in .mini-growth circle { opacity: 1; }
.mini-candles g { opacity: 0; transform: translateY(10px); transition: opacity .6s var(--ease), transform .8s var(--ease); transition-delay: calc(.35s + var(--i) * 70ms); }
.path.in .mini-candles g { opacity: 1; transform: none; }
.mini-candles .u line { stroke: var(--up); } .mini-candles .u rect { fill: var(--up); }
.mini-candles .d line { stroke: var(--down); } .mini-candles .d rect { fill: var(--down); }
.path-k { font-size: 12.5px; font-weight: 500; color: var(--accent); }
.path-h { font: 600 clamp(24px, 2.4vw, 30px)/1.12 var(--serif); letter-spacing: -.015em; max-width: 16ch; }
.path-m { margin-top: auto; padding-top: 18px; color: var(--muted); font: 12.5px var(--mono); }

.level-track { height: 2px; background: var(--rule); margin: 0 0 40px; overflow: hidden; border-radius: 1px; }
.level-track i { display: block; height: 100%; background: var(--accent); transform-origin: left; transform: scaleX(0); }
.levels { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.level-n { font: 500 13px var(--mono); color: var(--faint); }
.level h3 { font: 600 26px/1.15 var(--serif); letter-spacing: -.01em; margin: 10px 0 18px; }
.level ol { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--rule); }
.level li a { display: flex; justify-content: space-between; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--rule); color: var(--ink-2); text-decoration: none; font-size: 14px; }
.level li a::after { content: '→'; color: var(--faint); transition: transform .4s var(--ease), color .2s; }
.level li a:hover { color: var(--ink); }
.level li a:hover::after { transform: translateX(4px); color: var(--ink); }
.level li.done a::after { content: '✓'; color: var(--up); }

.trade-grid { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 64px; }
.lp-foot { max-width: 1180px; margin: 0 auto; padding: 120px 40px 56px; }

/* ---------- academy index ---------- */
.ac { max-width: 1180px; margin: 0 auto; padding: 13vh 40px 96px; }
.ac-hero h1 { font: 600 clamp(42px, 6.8vw, 94px)/.98 var(--serif); letter-spacing: -.035em; margin: 0 0 40px; max-width: 12.5ch; }
.ac-progress { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.ring { width: 64px; height: 64px; transform: rotate(-90deg); }
.ring .track { fill: none; stroke: var(--rule); stroke-width: 6; }
.ring .bar { fill: none; stroke: var(--accent); stroke-width: 6; stroke-linecap: round; stroke-dashoffset: var(--full); transition: stroke-dashoffset 1.8s var(--ease) .7s; }
.ac-progress.in .ring .bar { stroke-dashoffset: var(--off); }
.ac-progress b { display: block; font: 500 18px var(--mono); }
.ac-progress span { color: var(--muted); font-size: 13px; }
.ac-progress .btn { margin-left: 12px; }
.ac-level { margin-top: 16vh; }
.ac-level-head { display: flex; gap: 24px; align-items: baseline; margin-bottom: 32px; padding-bottom: 22px; border-bottom: 1px solid var(--rule); }
.ac-level-head .level-n { font: 600 clamp(44px, 6vw, 76px)/1 var(--serif); color: var(--faint); }
.ac-level-head h2 { font: 600 clamp(26px, 3.2vw, 40px)/1.1 var(--serif); letter-spacing: -.02em; margin: 0 0 4px; }
.ac-level-head p { margin: 0; color: var(--muted); }
.ac-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.ac-card { position: relative; display: flex; flex-direction: column; gap: 10px; min-height: 236px; padding: 28px; border-radius: 22px; background: var(--surface); border: 1px solid var(--rule); color: inherit; text-decoration: none; }
.ac-card:hover { border-color: var(--rule-strong); box-shadow: var(--shadow); }
.ac-card:hover .ac-t { text-decoration: underline; text-decoration-color: var(--rule-strong); text-underline-offset: 4px; }
.ac-card.next { border-color: var(--accent); }
.ac-num { font: 500 13px var(--mono); color: var(--faint); }
.ac-card.done .ac-num { color: var(--up); }
.ac-t { font: 600 23px/1.15 var(--serif); letter-spacing: -.012em; }
.ac-d { color: var(--muted); font-size: 13.5px; line-height: 1.5; }
.ac-m { margin-top: auto; font: 12px var(--mono); color: var(--muted); }
.ac-m b { color: var(--up); font-weight: 500; }
.ac-m b.nx { color: var(--accent); }
.ac-foot { margin-top: 12vh; color: var(--faint); font-size: 12px; }

/* ---------- chapter ---------- */
.read-progress { position: sticky; top: 0; z-index: 6; height: 0; }
.read-progress i { display: block; height: 2px; background: var(--accent); transform-origin: left; transform: scaleX(0); }
.ch-hero { position: relative; min-height: var(--page-h); display: flex; flex-direction: column; justify-content: center; max-width: 1080px; margin: 0 auto; padding: 0 40px 6vh; }
.ch-hero .back { position: absolute; top: 30px; left: 40px; font-size: 13px; }
.ch-hero .back::before { content: '← '; }
.ch-hero h1 { font: 600 clamp(46px, 8.2vw, 112px)/.96 var(--serif); letter-spacing: -.038em; margin: 0 0 28px; max-width: 12ch; }
.dek { font: clamp(18px, 1.8vw, 22px)/1.45 var(--serif); color: var(--ink-2); max-width: 560px; margin: 0 0 14px; }
.meta { font: 12.5px var(--mono); color: var(--muted); margin: 0; }

.story { display: grid; grid-template-columns: minmax(280px, 400px) minmax(0, 1fr); grid-template-areas: "steps stage"; column-gap: 56px; max-width: 1440px; margin: 0 auto; padding: 0 40px; }
.ch-stage { grid-area: stage; position: sticky; top: 0; height: var(--page-h); display: flex; align-items: center; align-self: start; }
.stage-inner { position: relative; width: 100%; height: min(80%, 680px); background: var(--surface); border: 1px solid var(--rule); border-radius: 26px; overflow: hidden; }
.steps { grid-area: steps; padding: 6vh 0 34vh; }
.step { min-height: 94vh; display: flex; align-items: center; }
.step-card { max-width: 380px; opacity: calc(.16 + .84 * var(--focus, 0)); transform: translate3d(0, calc((1 - var(--focus, 0)) * 22px), 0); will-change: opacity, transform; }
.step-n { font: 500 12px var(--mono); color: var(--accent); }
.step-card h3 { font: 600 clamp(26px, 2.6vw, 38px)/1.1 var(--serif); letter-spacing: -.02em; margin: 12px 0 14px; }
.step-card p { font-size: 16.5px; line-height: 1.55; color: var(--ink-2); margin: 0; }

.ch-after { max-width: 780px; margin: 0 auto; padding: 4vh 40px 120px; }
.ch-after > * + * { margin-top: 88px; }
.ch-after h2 { font: 600 clamp(26px, 3vw, 34px)/1.15 var(--serif); letter-spacing: -.018em; margin: 0 0 22px; }
.takeaways ol { list-style: none; margin: 0; padding: 0; counter-reset: t; }
.takeaways li { counter-increment: t; display: grid; grid-template-columns: 44px 1fr; align-items: baseline; padding: 16px 0; border-top: 1px solid var(--rule); font: 19px/1.45 var(--serif); }
.takeaways li::before { content: counter(t, decimal-leading-zero); font: 500 13px var(--mono); color: var(--accent); }
.quiz .q { font: 20px/1.45 var(--serif); margin: 0 0 20px; }
.opts { display: grid; gap: 10px; }
.opt { text-align: left; padding: 15px 20px; border-radius: 14px; border: 1px solid var(--rule-strong); background: var(--surface); font-size: 15px; transition: border-color .2s, background-color .2s, transform .3s var(--ease); }
.opt:hover:not(:disabled) { border-color: var(--ink); transform: translateX(3px); }
.opt:disabled { cursor: default; }
.opt.right { border-color: var(--up); background: var(--up-bg); color: var(--ink); }
.opt.wrong { border-color: var(--down); background: var(--down-bg); animation: shake .45s; }
@keyframes shake { 20%, 60% { transform: translateX(-5px); } 40%, 80% { transform: translateX(5px); } }
.why { margin: 16px 0 0; font-size: 15px; line-height: 1.5; }
.why.ok { color: var(--ink-2); padding-left: 14px; border-left: 2px solid var(--up); }
.why.no { color: var(--down); }
.practice { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 22px 26px; border-radius: 18px; background: var(--surface); border: 1px solid var(--rule); }
.practice > div { display: flex; flex-direction: column; gap: 2px; }
.practice .eyebrow { margin: 0 0 4px; }
.practice b { font: 600 19px var(--serif); }
.practice .muted { font-size: 13px; }
.ch-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.ch-nav-a { display: flex; flex-direction: column; gap: 6px; padding: 26px; border-radius: 20px; border: 1px solid var(--rule); color: inherit; text-decoration: none; transition: border-color .2s, box-shadow .4s var(--ease); }
.ch-nav-a:hover { border-color: var(--rule-strong); box-shadow: var(--shadow); }
.ch-nav-a span { font-size: 12px; color: var(--muted); }
.ch-nav-a b { font: 600 21px/1.2 var(--serif); }
.ch-nav-a.next { text-align: right; background: var(--ink); border-color: var(--ink); color: var(--surface); grid-column: 2; }
.ch-nav-a.next span { color: var(--surface); opacity: .65; }

.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tool-grid.two { grid-template-columns: 1fr 1fr; }
.tool-grid label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.tool-grid output { font: 500 20px var(--mono); color: var(--ink); }
.tool-grid input[type=range] { width: 100%; accent-color: var(--accent); }
.tool-out { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 26px; border-top: 1px solid var(--rule); }
.tool-out div { padding: 16px 12px 0 0; display: flex; flex-direction: column; gap: 4px; }
.tool-out span { font-size: 12px; color: var(--muted); }
.tool-out b { font: 500 22px var(--mono); font-variant-numeric: tabular-nums; }
.split-bar { height: 8px; border-radius: 4px; background: var(--accent); overflow: hidden; margin-top: 18px; }
.split-bar i { display: block; height: 100%; background: var(--rule-strong); transition: width .35s var(--ease); }

/* ---------- top bar per route ---------- */
body:not([data-route="trade"]) .instrument > *, body:not([data-route="trade"]) .session-progress { visibility: hidden; }
.nav button[aria-current="page"] { color: var(--ink); font-weight: 500; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .story { display: block; padding: 0; }
  .ch-stage { position: sticky; top: 0; z-index: 2; height: 56dvh; padding: 10px 12px 12px; background: var(--bg); }
  .stage-inner { height: 100%; border-radius: 18px; }
  .steps { position: relative; z-index: 1; padding: 6vh 16px 34vh; }
  .step { min-height: 62vh; }
  .step-card { max-width: none; padding: 20px 22px; background: var(--surface); border: 1px solid var(--rule); border-radius: 18px; box-shadow: var(--shadow); opacity: calc(.35 + .65 * var(--focus, 0)); }
  .step-card h3 { font-size: 24px; margin: 8px 0 8px; }
  .step-card p { font-size: 15px; }
  .paths, .levels, .trade-grid { grid-template-columns: 1fr; }
  .path { min-height: 0; }
  .lp-hundred .sticky { padding: 7vh 20px 16px; }
}
@media (max-width: 720px) {
  body:not([data-route="trade"]) .instrument { display: none; }
  body:not([data-route="trade"]) .top { height: 52px; flex-wrap: nowrap; padding: 0 12px; justify-content: space-between; }
  .nav button:not(.theme-toggle) { padding: 0 6px; font-size: 12.5px; }
}
@media (max-width: 440px) {
  #glossaryBtn { display: none; }
  .theme-toggle { margin-left: 6px; }
}
@media (max-width: 640px) {
  .lp-hero-copy, .lp-section, .ac, .ch-hero, .ch-after, .lp-foot { padding-left: 20px; padding-right: 20px; }
  .ch-hero .back { left: 20px; }
  .tool-grid, .tool-out { grid-template-columns: 1fr; }
  .ch-nav { grid-template-columns: 1fr; }
  .ch-nav-a.next { grid-column: auto; }
  .ac-progress .btn { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal], .split .w > span { transition: none !important; opacity: 1 !important; transform: none !important; filter: none !important; }
  .page.enter > * { animation: none; }
  .scroll-cue span { animation: none; }
}