/* diowo — cyber v5. See DESIGN.md for the system. */

:root {
  --bg: #070a12;
  --s1: #0c1322;
  --s2: #101a2e;
  --line: rgba(34, 225, 255, 0.14);
  --line-2: rgba(34, 225, 255, 0.28);
  --cyan: #22e1ff;
  --cyan-d: #0fb8d6;
  --mag: #ff3df2;
  --green: #3dff9a;
  --amber: #ffb547;
  --red: #ff4d6d;
  --t1: #e6edf7;
  --t2: #9aa8bf;
  --t3: #6f7d96;
  --glow: 0 0 0 1px rgba(34,225,255,.35), 0 0 24px rgba(34,225,255,.25);
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --head: "Space Grotesk", "Inter", system-ui, sans-serif;
  --body: "Inter", system-ui, -apple-system, Segoe UI, sans-serif;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --max: 1180px;
  --cut: 14px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--t1);
  font-family: var(--body); font-size: 16px; line-height: 1.65;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
h1, h2, h3, h4 { font-family: var(--head); margin: 0; letter-spacing: -0.02em; line-height: 1.08; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
code { font-family: var(--mono); }
::selection { background: rgba(34,225,255,.3); color: #fff; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 4px; }

.wrap { width: 100%; max-width: var(--max); margin-inline: auto; padding-inline: 24px; }
.narrow { max-width: 800px; }
.center { text-align: center; margin-inline: auto; }
.dim { color: var(--t3); }
.mono { font-family: var(--mono); }
.ok { color: var(--green); }
.skip { position: absolute; left: -999px; top: 0; z-index: 200; background: var(--cyan); color: var(--bg); padding: 10px 16px; font-weight: 600; }
.skip:focus { left: 0; }

/* ---------- Global FX ---------- */
.fx-grid {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image:
    linear-gradient(rgba(34,225,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34,225,255,.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 20%, #000 35%, transparent 85%);
}
.fx-grid::after {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(600px 400px at 85% 8%, rgba(34,225,255,.12), transparent 70%),
    radial-gradient(500px 380px at 8% 40%, rgba(255,61,242,.07), transparent 70%);
}
.fx-scan {
  position: fixed; inset: 0; z-index: 100; pointer-events: none; opacity: .35;
  background: repeating-linear-gradient(to bottom, transparent 0 2px, rgba(0,0,0,.18) 2px 3px);
}

/* ---------- HUD primitive ---------- */
.hud {
  position: relative;
  background: linear-gradient(180deg, rgba(16,26,46,.85), rgba(12,19,34,.85));
  border: 1px solid var(--line);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
}
.corner { position: absolute; width: 14px; height: 14px; border-color: var(--cyan); border-style: solid; border-width: 0; opacity: .9; pointer-events: none; }
.corner.tl { top: 6px; left: 6px; border-top-width: 2px; border-left-width: 2px; }
.corner.tr { top: 6px; right: 6px; border-top-width: 2px; border-right-width: 2px; }
.corner.bl { bottom: 6px; left: 6px; border-bottom-width: 2px; border-left-width: 2px; }
.corner.br { bottom: 6px; right: 6px; border-bottom-width: 2px; border-right-width: 2px; }

/* ---------- Buttons ---------- */
.btn {
  --c: var(--cyan);
  display: inline-flex; align-items: center; gap: 10px; justify-content: center;
  font: 600 15px var(--mono); letter-spacing: .01em; padding: 15px 24px; cursor: pointer;
  border: 1px solid transparent; white-space: nowrap;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: transform .18s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease), color .2s var(--ease);
}
.btn-sm { padding: 10px 16px; font-size: 13.5px; }
.btn-primary { background: var(--cyan); color: #04121a; box-shadow: 0 0 30px rgba(34,225,255,.35); }
.btn-primary:hover { background: #6deeff; transform: translateY(-2px); box-shadow: 0 0 44px rgba(34,225,255,.55); }
.btn-ghost { background: rgba(34,225,255,.06); color: var(--t1); border-color: var(--line-2); }
.btn-ghost:hover { background: rgba(34,225,255,.14); color: #fff; transform: translateY(-2px); }

/* ---------- Nav ---------- */
.nav-wrap { position: sticky; top: 0; z-index: 60; background: rgba(7,10,18,.72); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); border-bottom: 1px solid transparent; transition: border-color .2s; }
.nav-wrap.scrolled { border-bottom-color: var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { display: inline-flex; align-items: center; gap: 10px; }
.logo-mark { font: 700 18px var(--mono); color: var(--cyan); text-shadow: 0 0 14px rgba(34,225,255,.6); }
.logo-mark b { color: var(--t1); text-shadow: none; }
.logo-name { font: 700 21px var(--head); letter-spacing: -0.03em; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a:not(.btn) { font: 500 14px var(--mono); color: var(--t2); transition: color .15s; }
.nav-links a:not(.btn):hover { color: var(--cyan); }
.nav-links a i { font-style: normal; color: var(--cyan); opacity: .7; margin-right: 6px; font-size: 11.5px; }
.nav-toggle { display: none; background: none; border: 1px solid var(--line-2); padding: 10px 9px; cursor: pointer; flex-direction: column; gap: 5px; }
.nav-toggle span { width: 20px; height: 2px; background: var(--cyan); transition: transform .2s; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 72px 0 64px; }
.hero-net { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; opacity: .55; }
.hero-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 56px; align-items: center; }
.status { display: inline-flex; align-items: center; gap: 10px; font: 500 13px var(--mono); color: var(--green); padding: 7px 14px; border: 1px solid rgba(61,255,154,.3); background: rgba(61,255,154,.06); margin-bottom: 26px; }
.pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 0 rgba(61,255,154,.7); animation: pulse 2s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 10px rgba(61,255,154,0); } 100% { box-shadow: 0 0 0 0 rgba(61,255,154,0); } }
.hero h1 { font-size: clamp(40px, 5vw, 64px); font-weight: 700; }
.lead { margin-top: 24px; font-size: 18.5px; color: var(--t2); max-width: 560px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.cta-row.center { justify-content: center; }
.spec { list-style: none; padding: 0; margin: 40px 0 0; display: grid; grid-template-columns: repeat(4, auto); gap: 8px 28px; justify-content: start; }
.spec li { font: 500 12.5px var(--mono); color: var(--t3); text-transform: uppercase; letter-spacing: .08em; }
.spec b { display: block; font: 700 26px var(--head); color: var(--t1); letter-spacing: -0.02em; text-transform: none; }

/* Glitch word */
.glitch { position: relative; color: var(--cyan); text-shadow: 0 0 28px rgba(34,225,255,.45); display: inline-block; }
.glitch .g1, .glitch .g2 { position: absolute; inset: 0; pointer-events: none; text-shadow: none; }
.glitch .g1 { color: var(--mag); clip-path: inset(0 0 60% 0); opacity: 0; animation: gl1 3.4s infinite steps(1); }
.glitch .g2 { color: var(--green); clip-path: inset(55% 0 0 0); opacity: 0; animation: gl2 3.4s infinite steps(1); }
@keyframes gl1 { 0%, 88%, 100% { transform: translate(0); opacity: 0; } 90% { transform: translate(3px, -1px); opacity: .8; } 94% { transform: translate(-2px, 1px); opacity: .8; } }
@keyframes gl2 { 0%, 88%, 100% { transform: translate(0); opacity: 0; } 91% { transform: translate(-3px, 1px); opacity: .7; } 95% { transform: translate(2px, 0); opacity: .7; } }

/* ---------- Terminal ---------- */
.term { --cut: 18px; box-shadow: 0 30px 80px -30px rgba(0,0,0,.9), 0 0 60px -20px rgba(34,225,255,.35); }
.term-bar { display: flex; align-items: center; gap: 12px; padding: 12px 18px; border-bottom: 1px solid var(--line); font: 500 12.5px var(--mono); color: var(--t3); }
.dots { display: inline-flex; gap: 6px; }
.dots i { width: 10px; height: 10px; border-radius: 50%; background: #253147; }
.dots i:nth-child(1) { background: #ff5f57; } .dots i:nth-child(2) { background: #febc2e; } .dots i:nth-child(3) { background: #28c840; }
.term-title { flex: 1; color: var(--t2); }
.term-live { color: var(--red); font-weight: 700; letter-spacing: .08em; animation: blinkSoft 1.6s infinite; }
@keyframes blinkSoft { 50% { opacity: .35; } }
.term-split { display: grid; grid-template-columns: 1.25fr 1fr; min-height: 300px; }
.term-out { padding: 18px; font: 13.5px/1.75 var(--mono); color: #c7d2e8; overflow-y: auto; max-height: 340px; scrollbar-width: thin; scrollbar-color: #253147 transparent; }
.term-out .ln { white-space: pre-wrap; word-break: break-word; }
.term-out .c { color: var(--t1); }
.term-out .c::before { content: "$ "; color: var(--cyan); }
.term-out .ok { color: var(--green); }
.term-out .err { color: var(--red); }
.term-out .warn { color: var(--amber); }
.term-out .muted { color: var(--t3); }
.term-out .hl { color: var(--cyan); }
.tutor-pane { border-left: 1px solid var(--line); padding: 16px; background: rgba(34,225,255,.03); display: flex; flex-direction: column; }
.tp-head { display: flex; align-items: center; gap: 8px; font: 700 12.5px var(--mono); color: var(--cyan); text-transform: uppercase; letter-spacing: .1em; margin-bottom: 12px; }
.tp-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }
.tp-body { display: flex; flex-direction: column; gap: 10px; }
.tp-idle { font: 13px var(--mono); color: var(--t3); }
.tp-msg { font-size: 13.5px; line-height: 1.55; color: var(--t1); background: rgba(34,225,255,.07); border: 1px solid var(--line-2); padding: 11px 13px; animation: popIn .35s var(--ease); }
.tp-msg code { color: var(--cyan); background: rgba(34,225,255,.1); padding: 1px 5px; font-size: 12.5px; }
.tp-tag { font: 600 11.5px var(--mono); color: var(--amber); letter-spacing: .06em; }
@keyframes popIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.term-in { display: flex; align-items: center; gap: 10px; padding: 12px 18px; border-top: 1px solid var(--line); background: rgba(0,0,0,.25); }
.prompt { font: 600 13.5px var(--mono); color: var(--green); white-space: nowrap; }
.term-in input { flex: 1; min-width: 0; background: transparent; border: 0; outline: none; color: var(--t1); font: 13.5px var(--mono); caret-color: var(--cyan); }
.term-in input::placeholder { color: var(--t3); }
.term:focus-within { box-shadow: 0 30px 80px -30px rgba(0,0,0,.9), 0 0 70px -10px rgba(34,225,255,.5); }

/* ---------- Ticker ---------- */
.ticker { border-block: 1px solid var(--line); background: rgba(12,19,34,.6); overflow: hidden; padding: 16px 0; }
.ticker-track { display: flex; gap: 46px; width: max-content; animation: tick 40s linear infinite; }
.ticker-track span { font: 500 14px var(--mono); color: var(--t2); text-transform: uppercase; letter-spacing: .12em; }
.ticker-track span::before { content: "◆ "; color: var(--cyan); font-size: 9px; vertical-align: 2px; }
@keyframes tick { to { transform: translateX(-50%); } }

/* ---------- Sections ---------- */
.sec { padding: 110px 0; position: relative; }
.kicker { font: 500 13px var(--mono); color: var(--cyan); letter-spacing: .06em; margin-bottom: 16px; }
.sec h2 { font-size: clamp(32px, 4.2vw, 52px); font-weight: 700; }
.sec h2.center { max-width: 860px; }
.sub { margin-top: 20px; font-size: 18px; color: var(--t2); max-width: 560px; }

/* Problem log */
.why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.log { padding: 26px 26px 22px; font: 14px/1.6 var(--mono); }
.log-line { display: grid; grid-template-columns: 62px 1fr; gap: 14px; padding: 10px 0; border-bottom: 1px dashed rgba(34,225,255,.1); color: var(--t2); }
.log-line:last-child { border-bottom: 0; }
.log-line.fix { color: var(--t1); }
.lv { font-weight: 700; letter-spacing: .06em; }
.lv.warn { color: var(--amber); } .lv.err { color: var(--red); } .lv.ok { color: var(--green); }

/* Flow */
.flow { list-style: none; padding: 0; margin: 56px 0 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; position: relative; }
.flow::before { content: ""; position: absolute; left: 4%; right: 4%; top: 46px; height: 1px; background: linear-gradient(90deg, transparent, var(--cyan), transparent); opacity: .5; }
.flow li { padding: 30px 24px 28px; }
.step { display: inline-block; font: 700 13px var(--mono); color: var(--bg); background: var(--cyan); padding: 4px 9px; margin-bottom: 18px; box-shadow: 0 0 18px rgba(34,225,255,.45); }
.flow h3 { font-size: 20px; margin-bottom: 10px; }
.flow p { color: var(--t2); font-size: 15px; }

/* Bento */
.bento { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 56px; }
.mod { padding: 30px 28px; transition: border-color .2s, transform .2s var(--ease); }
.mod:hover { border-color: var(--line-2); transform: translateY(-3px); }
.m-wide { grid-column: span 2; }
.mod-id { display: block; font: 500 11.5px var(--mono); color: var(--cyan); letter-spacing: .12em; margin-bottom: 14px; opacity: .8; }
.mod h3 { font-size: 21px; margin-bottom: 10px; }
.mod p { color: var(--t2); font-size: 15px; max-width: 560px; }
.mini-term { margin-top: 20px; font: 13px/1.7 var(--mono); padding: 14px 16px; background: rgba(0,0,0,.35); border: 1px solid var(--line); color: var(--t1); }
.mini-term .g { color: var(--cyan); }
.bars { margin-top: 22px; display: flex; flex-direction: column; gap: 10px; }
.bars span { position: relative; display: block; font: 500 12.5px var(--mono); color: var(--t2); padding: 6px 10px; background: rgba(0,0,0,.3); border: 1px solid var(--line); overflow: hidden; }
.bars span::after { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: var(--w); background: linear-gradient(90deg, rgba(34,225,255,.28), rgba(34,225,255,.06)); border-right: 2px solid var(--cyan); z-index: -0; }
.bars span { isolation: isolate; }
.bars span::after { z-index: -1; }

/* Tutor ladder */
.tutor-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.checks { list-style: none; padding: 0; margin: 28px 0 0; display: flex; flex-direction: column; gap: 12px; }
.checks li { position: relative; padding-left: 28px; color: var(--t2); font-size: 15.5px; }
.checks li::before { content: "▸"; position: absolute; left: 4px; color: var(--cyan); }
.ladder { --cut: 18px; padding: 26px; }
.ladder-ctx { font: 13px var(--mono); color: var(--t2); padding: 12px 14px; background: rgba(0,0,0,.35); border: 1px solid var(--line); }
.ladder-ctx code { color: var(--t1); }
.ladder-tabs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 18px; }
.ladder-tabs button { font: 600 13px var(--mono); color: var(--t2); background: rgba(34,225,255,.04); border: 1px solid var(--line); padding: 11px 8px; cursor: pointer; transition: all .18s; }
.ladder-tabs button:hover { color: var(--t1); border-color: var(--line-2); }
.ladder-tabs button[aria-selected="true"] { color: var(--bg); background: var(--cyan); border-color: var(--cyan); box-shadow: 0 0 22px rgba(34,225,255,.4); }
.ladder-panel { margin-top: 16px; min-height: 168px; padding: 18px; background: rgba(34,225,255,.05); border: 1px solid var(--line-2); font-size: 15px; color: var(--t1); line-height: 1.6; }
.ladder-panel .who { display: block; font: 700 11.5px var(--mono); color: var(--cyan); letter-spacing: .12em; margin-bottom: 8px; }
.ladder-panel code { color: var(--cyan); background: rgba(34,225,255,.1); padding: 1px 6px; font-size: 13.5px; }
.ladder-panel pre { margin: 10px 0 0; font: 13px/1.6 var(--mono); color: var(--green); background: rgba(0,0,0,.35); padding: 10px 12px; border: 1px solid var(--line); white-space: pre-wrap; }
.ladder-meter { display: flex; align-items: center; gap: 12px; margin-top: 16px; font: 500 12.5px var(--mono); color: var(--t3); }
.meter { flex: 1; height: 6px; background: rgba(255,255,255,.06); }
.meter i { display: block; height: 100%; width: 90%; background: linear-gradient(90deg, var(--green), var(--cyan)); transition: width .4s var(--ease), background .4s; }
.ladder-meter b { color: var(--t1); min-width: 40px; text-align: right; }

/* Tracks */
.tracks { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; margin-top: 56px; }
.track { padding: 28px 22px; display: flex; flex-direction: column; gap: 10px; transition: border-color .2s, transform .2s var(--ease), box-shadow .2s; }
.track:hover { border-color: var(--cyan); transform: translateY(-4px); box-shadow: 0 0 40px -12px rgba(34,225,255,.5); }
.t-ico { font: 700 22px var(--mono); color: var(--cyan); text-shadow: 0 0 16px rgba(34,225,255,.5); height: 34px; }
.track h3 { font-size: 18px; }
.track p { color: var(--t2); font-size: 14px; flex: 1; }
.t-path { font: 500 11.5px var(--mono); color: var(--t3); letter-spacing: .06em; text-transform: uppercase; }

/* Audience */
.aud { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.aud-card { padding: 36px 34px; }
.aud-card h3 { font-size: 24px; }

/* Pricing */
.tiers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 56px; align-items: stretch; }
.tier { padding: 34px 30px; display: flex; flex-direction: column; }
.tier.featured { border-color: var(--cyan); box-shadow: 0 0 60px -18px rgba(34,225,255,.55); background: linear-gradient(180deg, rgba(34,225,255,.09), rgba(12,19,34,.9)); }
.tier-id { font: 500 11.5px var(--mono); color: var(--cyan); letter-spacing: .12em; text-transform: uppercase; }
.tier h3 { font-size: 24px; margin-top: 14px; }
.price { font: 700 52px var(--head); letter-spacing: -0.03em; margin-top: 12px; }
.price small { font: 500 14px var(--mono); color: var(--t3); letter-spacing: 0; margin-left: 4px; }
.tier .checks { flex: 1; margin-bottom: 30px; }
.tier .btn { width: 100%; }
.fine { margin-top: 26px; text-align: center; font: 13px var(--mono); color: var(--t3); }

/* FAQ */
.faq { margin-top: 44px; display: flex; flex-direction: column; gap: 10px; }
.faq details { border: 1px solid var(--line); background: rgba(12,19,34,.75); transition: border-color .2s; }
.faq details[open] { border-color: var(--line-2); }
.faq summary { list-style: none; cursor: pointer; padding: 20px 22px; font: 600 16px var(--body); display: flex; align-items: center; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "[+]"; margin-left: auto; font: 600 13px var(--mono); color: var(--cyan); }
.faq details[open] summary::after { content: "[−]"; }
.q { font-family: var(--mono); color: var(--cyan); }
.faq details p { padding: 0 22px 22px 46px; color: var(--t2); font-size: 15.5px; }

/* Final CTA */
.final-box { --cut: 24px; padding: 80px 32px; text-align: center; background: radial-gradient(600px 300px at 50% 0%, rgba(34,225,255,.16), transparent 70%), linear-gradient(180deg, rgba(16,26,46,.9), rgba(12,19,34,.9)); border-color: var(--line-2); }
.final-box h2 { font-size: clamp(38px, 5.6vw, 72px); }
.final-box .sub { margin-inline: auto; }
.glow { color: var(--cyan); text-shadow: 0 0 32px rgba(34,225,255,.55); }

/* Footer */
.foot { border-top: 1px solid var(--line); padding: 64px 0 30px; background: rgba(5,8,14,.8); }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 32px; padding-bottom: 36px; border-bottom: 1px solid var(--line); }
.foot-tag { margin-top: 14px; color: var(--t3); font-size: 14.5px; }
.foot h4 { font: 500 12.5px var(--mono); color: var(--cyan); letter-spacing: .08em; margin-bottom: 14px; }
.foot nav { display: flex; flex-direction: column; gap: 10px; }
.foot nav a { color: var(--t2); font-size: 14.5px; transition: color .15s; }
.foot nav a:hover { color: var(--cyan); }
.foot-base { display: flex; justify-content: space-between; padding-top: 24px; font: 13px var(--mono); color: var(--t3); }

/* Reveal */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1040px) {
  .hero-grid, .why-grid, .tutor-grid { grid-template-columns: 1fr; gap: 44px; }
  .tracks { grid-template-columns: repeat(3, 1fr); }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .flow::before { display: none; }
  .bento { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: fixed; inset: 70px 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(7,10,18,.97); border-bottom: 1px solid var(--line); padding: 8px 24px 22px;
    transform: translateY(-8px); opacity: 0; visibility: hidden; transition: all .22s var(--ease);
  }
  .nav-links.open { transform: none; opacity: 1; visibility: visible; }
  .nav-links a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav-links .btn { margin-top: 14px; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }
  .term-split { grid-template-columns: 1fr; }
  .tutor-pane { border-left: 0; border-top: 1px solid var(--line); }
  .spec { grid-template-columns: repeat(2, auto); }
  .bento, .tiers, .aud { grid-template-columns: 1fr; }
  .m-wide { grid-column: auto; }
  .tracks { grid-template-columns: 1fr 1fr; }
  .sec { padding: 80px 0; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .flow, .tracks { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
  .foot-base { flex-direction: column; gap: 8px; }
  .ladder-tabs button { font-size: 11.5px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
  .fx-scan { display: none; }
}