/* ==========================================================================
   Brmel Builder — Scroll-World (WebGL) layer
   Builds on style.css tokens (acid theme). Adds the cinematic hero world,
   beat overlays, progress rail, and the CSS-3D exploded builder.
   ========================================================================== */

/* ---------- world shell ---------- */
.strip { overflow: clip; }
.world-wrap { position: relative; height: 760vh; background: var(--bg); }
.world-stage { position: sticky; top: 0; height: 100vh; overflow: hidden; }
#world { position: absolute; inset: 0; width: 100%; height: 100%; display: block; z-index: 0; }
.world-stage .grain { z-index: 3; opacity: .05; }
.world-vignette { position: absolute; inset: 0; z-index: 2; pointer-events: none;
  background: radial-gradient(120% 85% at 50% 42%, transparent 40%, rgba(20,20,25,.6) 100%); }

/* scroll cue */
.scroll-cue { position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%); z-index: 6;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font: 500 11px/1 var(--font-mono); letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
html[dir="rtl"] .scroll-cue { letter-spacing: 0; font-family: var(--font-body); }
.scroll-cue i { width: 22px; height: 34px; border: 1.5px solid var(--border-strong); border-radius: var(--r-pill); position: relative; }
.scroll-cue i::after { content: ""; position: absolute; left: 50%; top: 7px; width: 3px; height: 7px; border-radius: 3px; background: var(--accent); transform: translateX(-50%); animation: cueDrop 1.8s var(--ease-out-expo) infinite; }
@keyframes cueDrop { 0%,20% { opacity: 0; transform: translate(-50%,0); } 50% { opacity: 1; } 80%,100% { opacity: 0; transform: translate(-50%,12px); } }

/* skip link */
.skip-story { position: absolute; top: calc(var(--nav-h) + 12px); inset-inline-end: 20px; z-index: 6;
  height: 34px; padding-inline: var(--s4); display: inline-flex; align-items: center; gap: 6px;
  border-radius: var(--r-pill); border: 1px solid var(--border); background: rgba(20,20,25,.6); backdrop-filter: blur(10px);
  font: 500 12.5px/1 var(--font-body); color: var(--text); opacity: 0; transition: opacity var(--dur-ui); }
.world-stage:hover .skip-story, .skip-story:focus-visible { opacity: 1; }

/* ---------- beat overlays ---------- */
.world-overlays { position: absolute; inset: 0; z-index: 5; pointer-events: none; }
.beat { position: absolute; inset: 0; display: grid; align-content: center; padding: 0 24px;
  opacity: 0; visibility: hidden; transition: opacity .7s var(--ease-out-expo), transform .7s var(--ease-out-expo); }
.beat-inner { width: 100%; max-width: var(--maxw); margin-inline: auto; }
.beat.is-active { opacity: 1; visibility: visible; }
.beat:not(.is-active) { transform: translateY(24px); }
.beat-panel { max-width: 620px; }
.beat.center .beat-inner { text-align: center; }
.beat.center .beat-panel { margin-inline: auto; }
.beat.hook { align-content: start; padding-top: calc(var(--nav-h) + 6vh); }
.beat.low { align-content: end; padding-bottom: 10vh; }
.beat.end .beat-inner { display: flex; justify-content: flex-end; }
html[dir="rtl"] .beat.end .beat-inner { justify-content: flex-start; }

.beat-label { display: inline-flex; align-items: center; gap: 8px; font: 600 12px/1 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
html[dir="rtl"] .beat-label { letter-spacing: 0; font-family: var(--font-body); font-size: 13px; }
.beat-label::before { content: ""; width: 20px; height: 1px; background: var(--accent); }
.beat h1, .beat h2 { margin-top: var(--s4); font-family: var(--font-display); color: var(--ink); letter-spacing: -0.035em; text-wrap: balance; }
html[lang="ar"] .beat h1, html[lang="ar"] .beat h2 { letter-spacing: 0; line-height: 1.25; }
.beat h1 { font-size: clamp(32px, 6.6vw, 92px); font-weight: 700; line-height: 1.02; text-shadow: 0 2px 40px rgba(20,20,25,.85); }
.beat h2 { font-size: clamp(26px, 4.4vw, 60px); font-weight: 700; line-height: 1.06; text-shadow: 0 2px 30px rgba(20,20,25,.88); }
.beat h1 .accent, .beat h2 .accent { color: var(--accent); text-shadow: 0 0 48px rgba(217,255,46,.4); }
.beat p { margin-top: var(--s4); max-width: 46ch; font-size: clamp(15px, 1.5vw, 18px); color: var(--text); text-shadow: 0 1px 20px rgba(15,11,20,.9); }
.beat.center p { margin-inline: auto; }
.beat-ctas { margin-top: var(--s6); display: flex; flex-wrap: wrap; gap: var(--s3); }
.beat.center .beat-ctas { justify-content: center; }

/* identity shimmer block (beat 3) */
.idshim { margin-top: var(--s5); display: inline-grid; gap: 6px; padding: var(--s4) var(--s5); border-radius: var(--r-md);
  border: 1px solid var(--border-strong); background: rgba(20,20,25,.62); backdrop-filter: blur(12px); direction: ltr; text-align: left; }
.idshim div { display: grid; grid-template-columns: 92px 1fr; gap: var(--s3); font: 500 12.5px/1.5 var(--font-mono); }
.idshim span { color: var(--muted); }
.idshim b { color: var(--accent); font-weight: 500; }
/* network chips (beat 4) */
.netrow { margin-top: var(--s5); display: flex; flex-wrap: wrap; gap: var(--s2); }
.netrow .chip { background: rgba(20,20,25,.6); backdrop-filter: blur(10px); }
.beat.center .netrow { justify-content: center; }

/* ---------- progress rail ---------- */
.beat-rail { position: absolute; inset-inline-start: 22px; top: 50%; transform: translateY(-50%); z-index: 6;
  display: flex; flex-direction: column; gap: 14px; pointer-events: auto; }
.beat-rail button { position: relative; width: 12px; height: 12px; border-radius: 50%; background: transparent; border: 1.5px solid var(--border-strong); transition: border-color var(--dur-ui), background var(--dur-ui); cursor: pointer; }
.beat-rail button::before { content: attr(data-n); position: absolute; inset-inline-start: 22px; top: 50%; transform: translateY(-50%); white-space: nowrap; font: 600 11px/1 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); opacity: 0; transition: opacity var(--dur-micro); pointer-events: none; }
html[dir="rtl"] .beat-rail button::before { inset-inline-start: auto; inset-inline-end: 22px; }
.beat-rail button:hover::before { opacity: 1; }
.beat-rail button:hover { border-color: var(--accent-line); }
.beat-rail button[aria-current="true"] { background: var(--accent); border-color: var(--accent); box-shadow: 0 0 14px rgba(217,255,46,.6); }
@media (max-width: 720px) { .beat-rail { inset-inline-start: 14px; gap: 11px; } .beat-rail button::before { display: none; } .skip-story { inset-inline-end: 12px; } }
@media (max-width: 560px) {
  .beat { padding-inline: 34px 20px; }          /* clear the beat rail */
  .beat.center { padding-inline: 24px; }
  .beat-panel { max-width: 100%; }
  .beat-ctas { flex-direction: column; align-items: stretch; gap: var(--s3); }
  .beat.center .beat-ctas { align-items: center; }
  .beat-ctas .btn { width: 100%; max-width: 340px; }
  .beat.hook { padding-top: calc(var(--nav-h) + 3vh); }
  .beat p { font-size: 15px; }
  .idshim { width: 100%; }
  .idshim div { grid-template-columns: 78px 1fr; }
}
@media (max-width: 380px) {
  .beat h1 { font-size: 30px; }
  .beat h2 { font-size: 24px; }
  .beat-label { font-size: 11px; }
  .beat p { font-size: 14px; }
}
/* short / landscape phones — compress so the beat copy always fits */
@media (max-height: 640px) and (min-width: 561px) {
  .beat { align-content: center; }
  .beat.hook { align-content: center; padding-top: var(--nav-h); }
  .beat h1 { font-size: clamp(26px, 5vw, 48px); }
  .beat h2 { font-size: clamp(22px, 3.6vw, 38px); }
  .beat p { font-size: 14px; margin-top: 10px; max-width: 52ch; }
  .beat-ctas { margin-top: 16px; }
  .idshim { margin-top: 12px; padding: 10px 14px; }
  .scroll-cue { display: none; }
}
@media (max-height: 460px) {
  .beat p { display: none; }          /* very short landscape: headline + CTA only */
  .beat .idshim, .beat .netrow { display: none; }
  .beat h1 { font-size: 24px; }
  .beat h2 { font-size: 22px; }
}

/* ---------- WebGL-off poster fallback ---------- */
.world-poster { position: absolute; inset: 0; z-index: 4; display: none; align-content: center; padding: calc(var(--nav-h) + var(--s7)) 24px var(--s8);
  background-color: var(--bg-deep); background-position: center; background-size: cover; background-repeat: no-repeat; }
.world-poster::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(15,11,20,.55), rgba(15,11,20,.82)); z-index: -1; }
html.no-webgl .world-wrap { height: auto; }
html.no-webgl .world-stage { position: static; height: auto; min-height: 100vh; }
html.no-webgl #world, html.no-webgl .world-overlays, html.no-webgl .beat-rail, html.no-webgl .scroll-cue, html.no-webgl .skip-story { display: none !important; }
html.no-webgl .world-poster { display: grid; position: relative; }
.world-poster .beat-inner { max-width: var(--maxw); margin-inline: auto; }

/* first-paint: before JS decides, show poster copy so no blank hero */
.no-js .world-overlays .beat[data-beat="0"] { opacity: 1; visibility: visible; transform: none; }
.no-js .world-wrap { height: 100vh; }
.no-js .world-stage { position: static; }
.no-js #world { display: none; }

/* ---------- exploded builder (CSS 3D, scroll-driven) ---------- */
.exploded { position: relative; }
.exploded-stage { position: relative; height: 300vh; }
.exploded-pin { position: sticky; top: 0; min-height: 100vh; display: grid; grid-template-columns: 1fr; align-items: center; gap: var(--s7); padding-block: var(--s8); }
.exploded-visual { position: relative; height: 46vh; min-height: 320px; perspective: 1400px; overflow-x: clip; }
.exploded-scene { position: absolute; inset: 0; transform-style: preserve-3d; transform: rotateX(56deg) rotateZ(-34deg); display: grid; place-items: center; }
.layer { position: absolute; width: min(56vw, 320px); aspect-ratio: 1; border-radius: 18px; border: 1px solid var(--border-strong);
  background: color-mix(in srgb, var(--card) 82%, transparent); backdrop-filter: blur(4px);
  display: grid; place-items: center; transform-style: preserve-3d; will-change: transform;
  box-shadow: 0 20px 60px rgba(0,0,0,.4); transition: box-shadow var(--dur-ui); }
.layer .layer-face { display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--muted); transform: translateZ(1px); }
.layer .layer-face svg { width: 34px; height: 34px; color: var(--accent); }
.layer .layer-face b { font: 600 13px/1 var(--font-mono); color: var(--ink); letter-spacing: .04em; }
.layer.is-focus { border-color: var(--accent-line); box-shadow: 0 24px 70px rgba(217,255,46,.16); }
.exploded-copy { max-width: 560px; }
.exploded-steps { margin-top: var(--s6); display: grid; gap: var(--s2); }
.ex-step { padding: var(--s4) var(--s5); border-radius: var(--r-md); border: 1px solid transparent; transition: background var(--dur-ui), border-color var(--dur-ui); }
.ex-step.on { background: var(--card); border-color: var(--accent-line); }
.ex-step b { display: flex; align-items: center; gap: var(--s3); font: 700 16px/1.2 var(--font-display); color: var(--ink); }
html[lang="ar"] .ex-step b { font-family: var(--font-body); }
.ex-step .ex-n { width: 30px; height: 30px; border-radius: 8px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); font: 600 13px/1 var(--font-mono); flex: none; }
.ex-step.on .ex-n { background: var(--accent); color: var(--accent-ink); }
.ex-step p { margin-top: 6px; padding-inline-start: 42px; font-size: var(--fs-small); color: var(--text); }
html[dir="rtl"] .ex-step p { padding-inline-start: 42px; }
@media (min-width: 980px) { .exploded-pin { grid-template-columns: 1fr 1fr; gap: var(--s9); } .exploded-visual { height: 70vh; } }
@media (prefers-reduced-motion: reduce) {
  .exploded-stage { height: auto; }
  .exploded-pin { position: static; min-height: 0; }
  .exploded-scene { transform: rotateX(52deg) rotateZ(-36deg); }
  .scroll-cue i::after { animation: none; }
}

/* ==========================================================================
   v3 NEW SECTIONS — how-it-works, isolation comparison, use-cases, FAQ
   ========================================================================== */

/* how it works — 3 steps */
.how { display: grid; gap: var(--s5); grid-template-columns: 1fr; counter-reset: how; }
@media (min-width: 820px) { .how { grid-template-columns: repeat(3, 1fr); gap: var(--s6); } }
.how-step { position: relative; padding: var(--s6) var(--s5); border-radius: var(--r-lg); background: var(--card); border: 1px solid var(--border); transition: border-color var(--dur-ui), transform var(--dur-ui) var(--ease-out-expo); overflow: hidden; }
.how-step:hover { border-color: var(--accent2-line); transform: translateY(-4px); }
.how-step::before { counter-increment: how; content: "0" counter(how); position: absolute; top: var(--s4); inset-inline-end: var(--s5); font: 800 42px/1 var(--font-display); background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; opacity: .28; }
.how-ico { width: 52px; height: 52px; border-radius: var(--r-md); display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); }
.how-ico svg { width: 26px; height: 26px; }
.how-step h3 { margin-top: var(--s5); font: 700 20px/1.2 var(--font-display); color: var(--ink); letter-spacing: -0.01em; }
html[lang="ar"] .how-step h3 { letter-spacing: 0; }
.how-step p { margin-top: var(--s3); font-size: var(--fs-small); color: var(--text); }
.how-arrow { display: none; }
@media (min-width: 820px) { .how-arrow { display: grid; place-items: center; color: var(--accent2); opacity: .6; } .how-arrow svg { width: 26px; height: 26px; } html[dir="rtl"] .how-arrow svg { transform: scaleX(-1); } }

/* isolation comparison */
.compare { display: grid; gap: var(--s4); grid-template-columns: 1fr; }
@media (min-width: 760px) { .compare { grid-template-columns: 1fr 1fr; gap: var(--s5); } }
.cmp { padding: var(--s6); border-radius: var(--r-lg); border: 1px solid var(--border); background: var(--card); }
.cmp.bad { background: color-mix(in srgb, var(--danger) 6%, var(--card)); }
.cmp.good { border-color: var(--accent-line); background: color-mix(in srgb, var(--accent) 5%, var(--card)); box-shadow: var(--glow-mix); }
.cmp h3 { display: flex; align-items: center; gap: var(--s3); font: 700 20px/1.2 var(--font-display); color: var(--ink); }
html[lang="ar"] .cmp h3 { font-family: var(--font-body); }
.cmp-badge { width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; flex: none; }
.cmp.bad .cmp-badge { background: rgba(255,107,94,.14); color: var(--danger); }
.cmp.good .cmp-badge { background: var(--accent-soft); color: var(--accent); }
.cmp ul { margin-top: var(--s5); display: grid; gap: var(--s3); }
.cmp li { display: flex; align-items: flex-start; gap: var(--s3); font-size: var(--fs-small); color: var(--text); line-height: 1.5; }
.cmp li svg { width: 18px; height: 18px; flex: none; margin-top: 1px; }
.cmp.bad li svg { color: var(--danger); }
.cmp.good li svg { color: var(--accent); }

/* use cases grid */
.uc-grid { display: grid; gap: var(--s4); grid-template-columns: 1fr; }
@media (min-width: 640px) { .uc-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 980px) { .uc-grid { grid-template-columns: repeat(3, 1fr); } }
.uc { padding: var(--s5); border-radius: var(--r-lg); background: var(--card); border: 1px solid var(--border); transition: border-color var(--dur-ui), transform var(--dur-ui) var(--ease-out-expo), background var(--dur-ui); }
.uc:hover { transform: translateY(-4px); background: var(--card-2); }
.uc-ico { width: 46px; height: 46px; border-radius: var(--r-md); display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); transition: background var(--dur-ui), color var(--dur-ui); }
.uc-ico svg { width: 23px; height: 23px; }
.uc h3 { margin-top: var(--s4); font: 700 17px/1.25 var(--font-display); color: var(--ink); }
html[lang="ar"] .uc h3 { font-family: var(--font-body); }
.uc p { margin-top: var(--s2); font-size: 13.5px; line-height: 1.55; color: var(--text); }

/* FAQ accordion */
.faq { max-width: 820px; margin-inline: auto; display: grid; gap: var(--s3); }
.faq-item { border: 1px solid var(--border); border-radius: var(--r-md); background: var(--card); overflow: hidden; transition: border-color var(--dur-ui); }
.faq-item.open { border-color: var(--accent2-line); }
.faq-q { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: var(--s4); padding: var(--s5); text-align: start; font: 600 16px/1.4 var(--font-body); color: var(--ink); }
.faq-q .faq-ico { width: 26px; height: 26px; flex: none; position: relative; }
.faq-q .faq-ico::before, .faq-q .faq-ico::after { content: ""; position: absolute; inset: 50% 4px auto 4px; height: 2px; background: var(--accent); transform: translateY(-50%); transition: transform var(--dur-ui) var(--ease-out-expo); border-radius: 2px; }
.faq-q .faq-ico::after { transform: translateY(-50%) rotate(90deg); }
.faq-item.open .faq-q .faq-ico::after { transform: translateY(-50%) rotate(0); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height var(--dur-ui) var(--ease-out-expo); }
.faq-a-inner { padding: 0 var(--s5) var(--s5); font-size: var(--fs-small); line-height: 1.6; color: var(--text); }

/* word-reveal for headings */
.js .wr .w { display: inline-block; opacity: 0; transform: translateY(0.5em); transition: opacity .6s var(--ease-out-expo), transform .6s var(--ease-out-expo); transition-delay: calc(var(--wi,0) * 40ms); }
.js .wr.is-visible .w { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .js .wr .w { opacity: 1; transform: none; } }