/* =========================================================
   Twilight Echo — Project Site v2
   Editorial / brutalist-warm · bone · vermillion · lime · forest
   Fonts: Archivo Black · Fraunces · Space Grotesk · Space Mono
   ========================================================= */

:root {
  --bone: #F3EBDD;
  --bone-2: #E8DFCE;
  --bone-3: #D6CBB6;
  --ink: #14110E;
  --ink-2: #2C241C;
  --ink-soft: #4A3F34;
  --ink-mute: #8A7B6A;
  --verm: #E23D28;
  --verm-deep: #B02818;
  --lime: #C6F04A;
  --lime-hot: #D9FF5E;
  --forest: #1A4635;
  --forest-deep: #0B241A;
  --clay: #C9A87A;
  --white: #FFFCFA;
  --blue: #5BA8FF;

  --font-black: "Archivo Black", "Syne", system-ui, sans-serif;
  --font-serif: "Fraunces", "Instrument Serif", Georgia, serif;
  --font-sans: "Space Grotesk", system-ui, sans-serif;
  --font-mono: "Space Mono", ui-monospace, monospace;

  --nav-h: 68px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --pad: clamp(1.1rem, 3.5vw, 2.75rem);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
}

body {
  font-family: var(--font-sans);
  background: var(--bone);
  color: var(--ink);
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  cursor: none;
}

body.touch { cursor: auto; }
body.touch .cursor { display: none !important; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
code { font-family: var(--font-mono); font-size: 0.9em; }
button { font: inherit; }

/* ---------- grain / cursor / progress ---------- */
.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 9990;
  opacity: 0.055;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.cursor {
  pointer-events: none;
  position: fixed;
  top: 0; left: 0;
  z-index: 9999;
  mix-blend-mode: difference;
  transform: translate(-50%, -50%);
  will-change: transform;
}
.cursor span {
  display: block;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #fff;
  transition: width .25s var(--ease), height .25s var(--ease), background .2s;
}
.cursor.hover span {
  width: 52px; height: 52px;
  background: var(--lime);
  mix-blend-mode: normal;
}
.cursor.click span {
  width: 10px; height: 10px;
}

.progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 200;
  background: transparent;
}
.progress i {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--verm), var(--lime));
  transition: width .1s linear;
}

/* ---------- side index ---------- */
.side-index {
  position: fixed;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.12em;
  writing-mode: horizontal-tb;
}
.side-index a {
  color: var(--ink-mute);
  transition: color .2s, transform .2s;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.side-index a::before {
  content: attr(data-i);
  color: var(--ink-mute);
  opacity: .6;
}
.side-index a:hover,
.side-index a.active {
  color: var(--verm);
  transform: translateX(3px);
}
.side-index a.active::before { color: var(--verm); opacity: 1; }

@media (max-width: 1100px) {
  .side-index { display: none; }
}

/* ---------- nav ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 var(--pad);
  background: color-mix(in srgb, var(--bone) 78%, transparent);
  backdrop-filter: blur(18px) saturate(1.3);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.nav.scrolled {
  border-bottom-color: var(--bone-3);
  background: color-mix(in srgb, var(--bone) 92%, transparent);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-black);
  font-size: .95rem;
  letter-spacing: .02em;
  justify-self: start;
}
.nav-brand img { border-radius: 6px; }
.nav-brand em {
  font-style: normal;
  color: var(--verm);
  margin-left: .15em;
}
.nav-center { justify-self: center; }
.live {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--ink-soft);
}
.live i {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 0 rgba(198, 240, 74, .6);
  animation: livepulse 1.8s ease-in-out infinite;
}
@keyframes livepulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(198, 240, 74, .55); }
  50% { box-shadow: 0 0 0 7px rgba(198, 240, 74, 0); }
}
.nav-actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 1.1rem;
}
.nav-link {
  font-weight: 600;
  font-size: .9rem;
  color: var(--ink-soft);
  transition: color .2s;
}
.nav-link:hover { color: var(--ink); }
.burger {
  display: none;
  position: absolute;
  top: 50%;
  right: var(--pad);
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border: 0;
  background: transparent;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
}
.burger i {
  display: block;
  height: 2px;
  width: 22px;
  background: var(--ink);
}

/* ---------- magnetic buttons ---------- */
.btn-mag {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .72rem 1.3rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: .92rem;
  border: 2px solid var(--ink);
  background: transparent;
  color: var(--ink);
  overflow: hidden;
  transition: color .25s, background .25s, border-color .25s, box-shadow .25s;
}
.btn-mag span {
  display: inline-block;
  transition: transform .25s var(--ease);
  pointer-events: none;
}
.btn-mag.solid {
  background: var(--verm);
  color: var(--white);
  border-color: var(--verm-deep);
  box-shadow: 5px 5px 0 var(--ink);
}
.btn-mag.solid:hover {
  background: var(--verm-deep);
  box-shadow: 7px 7px 0 var(--ink);
}
.btn-mag.xl {
  padding: 1.05rem 1.7rem;
  font-size: 1.05rem;
}
.btn-text {
  font-weight: 700;
  font-size: .95rem;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 2px;
  transition: color .2s, border-color .2s;
}
.btn-text:hover { color: var(--verm); border-color: var(--verm); }
.btn-text.dark { border-color: var(--ink); }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  padding: calc(var(--nav-h) + 1.5rem) var(--pad) 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: .55;
}
.orb-a {
  width: 48vw; height: 48vw;
  max-width: 560px; max-height: 560px;
  background: var(--lime);
  top: -10%; right: -8%;
  opacity: .35;
}
.orb-b {
  width: 36vw; height: 36vw;
  max-width: 420px; max-height: 420px;
  background: var(--verm);
  bottom: 10%; left: -10%;
  opacity: .18;
}
.grid-floor {
  position: absolute;
  inset: auto 0 0 0;
  height: 40%;
  background-image:
    linear-gradient(to right, rgba(20,17,14,.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(20,17,14,.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to top, rgba(0,0,0,.5), transparent);
}

.hero-kicker {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 1.25rem;
}
.tag {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .1em;
  padding: .38rem .7rem;
  border-radius: 999px;
  background: var(--ink);
  color: var(--bone);
}
.tag-hot { background: var(--verm); color: var(--white); }
.tag-line {
  background: transparent;
  color: var(--ink-soft);
  border: 1.5px solid var(--bone-3);
}

/* mega type */
.mega {
  position: relative;
  z-index: 1;
  margin-bottom: 1.5rem;
}
.mega-row {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: .15em .35em;
  line-height: .86;
}
.mega-fill {
  font-family: var(--font-black);
  font-size: clamp(3.8rem, 14vw, 11.5rem);
  letter-spacing: -.04em;
  color: var(--ink);
  display: inline-block;
}
.mega-fill.hot { color: var(--verm); }
.mega-outline {
  font-family: var(--font-black);
  font-size: clamp(3.8rem, 14vw, 11.5rem);
  letter-spacing: -.04em;
  color: transparent;
  -webkit-text-stroke: 2px var(--ink);
  opacity: .18;
  margin-left: -.15em;
  display: none;
}
@media (min-width: 900px) {
  .mega-outline { display: inline-block; }
}
.mega-serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(2.4rem, 7vw, 6rem);
  letter-spacing: -.02em;
  color: var(--ink-soft);
}
.mega-slash {
  font-family: var(--font-black);
  font-size: clamp(2.8rem, 8vw, 6.5rem);
  color: var(--lime);
  transform: rotate(-8deg);
  display: inline-block;
}
.mega-row-3 {
  margin-top: .55rem;
  align-items: center;
  gap: 1rem;
}
.mega-cn {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.35rem, 2.8vw, 2.1rem);
  letter-spacing: .02em;
  background: var(--lime);
  padding: .25rem .7rem;
  display: inline-block;
  transform: rotate(-1.2deg);
  box-shadow: 4px 4px 0 var(--ink);
}
.mega-stamp {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  border: 2px solid var(--verm);
  color: var(--verm);
  padding: .4rem .65rem;
  border-radius: 4px;
  transform: rotate(6deg);
  font-weight: 700;
}

.hero-bottom {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: end;
  flex: 1;
  padding-bottom: 1.25rem;
}
.hero-copy p {
  font-size: clamp(1.02rem, 1.5vw, 1.18rem);
  color: var(--ink-soft);
  max-width: 30rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}
.hero-copy strong {
  color: var(--ink);
  font-weight: 700;
  background: linear-gradient(transparent 62%, rgba(198,240,74,.7) 62%);
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.1rem;
}

/* oscilloscope */
.hero-oscope {
  display: flex;
  flex-direction: column;
  gap: .85rem;
}
.oscope-frame {
  background: var(--forest-deep);
  border: 2px solid var(--ink);
  border-radius: 18px;
  padding: .85rem 1rem 1rem;
  box-shadow: 10px 10px 0 var(--ink);
  position: relative;
  overflow: hidden;
}
.oscope-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(198,240,74,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(198,240,74,.04) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}
.oscope-meta {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: .65rem;
  letter-spacing: .12em;
  color: color-mix(in srgb, var(--lime) 80%, white);
  margin-bottom: .4rem;
  position: relative;
}
#oscope {
  width: 100%;
  height: auto;
  display: block;
  position: relative;
  mix-blend-mode: screen;
}
.oscope-feet {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: .45rem;
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .1em;
  color: color-mix(in srgb, var(--bone) 45%, transparent);
  position: relative;
}
.oscope-feet .needle {
  flex: 1;
  height: 2px;
  margin: 0 .8rem;
  background: linear-gradient(90deg, var(--verm), var(--lime));
  opacity: .5;
}
.hero-chips {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .65rem;
}
.hchip {
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 12px;
  padding: .7rem .85rem;
  display: flex;
  flex-direction: column;
  gap: .15rem;
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform .25s var(--ease);
}
.hchip:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--ink); }
.hchip.lime { background: var(--lime); }
.hchip em {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .12em;
  color: var(--ink-mute);
}
.hchip strong {
  font-size: .88rem;
  letter-spacing: -.02em;
}
.hchip b.ok {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  color: var(--verm);
}
.hchip.lime b.ok { color: var(--forest); }

.hero-stats-bar {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--ink);
  border: 2px solid var(--ink);
  margin: 0 calc(-1 * var(--pad));
}
.hero-stats-bar > div {
  background: var(--bone);
  padding: 1.1rem var(--pad);
  display: flex;
  flex-direction: column;
  gap: .15rem;
}
.hero-stats-bar strong {
  font-family: var(--font-black);
  font-size: 1.15rem;
  letter-spacing: -.02em;
}
.hero-stats-bar span {
  font-family: var(--font-mono);
  font-size: .65rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

/* ---------- tickers ---------- */
.ticker {
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}
.ticker-row {
  overflow: hidden;
  background: var(--ink);
  color: var(--lime);
  padding: .85rem 0;
}
.ticker-row.rev {
  background: var(--verm);
  color: var(--white);
  border-top: 2px solid var(--ink);
  padding: .7rem 0;
}
.ticker-track {
  display: flex;
  gap: 1.4rem;
  width: max-content;
  font-family: var(--font-mono);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .16em;
  animation: tick 36s linear infinite;
}
.ticker-row.rev .ticker-track {
  animation-direction: reverse;
  animation-duration: 42s;
  letter-spacing: .12em;
  font-size: .75rem;
}
.ticker-track i {
  color: var(--verm);
  font-style: normal;
}
.ticker-row.rev .ticker-track i { color: var(--lime); }
@keyframes tick {
  to { transform: translateX(-50%); }
}

/* ---------- chapter label ---------- */
.chapter {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--verm);
  margin-bottom: 1rem;
}
.chapter.light { color: var(--lime); }

/* ---------- SIGNAL ---------- */
.signal {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: clamp(2rem, 5vw, 4rem);
  padding: clamp(4.5rem, 10vw, 8rem) var(--pad);
  overflow: hidden;
  border-bottom: 2px solid var(--ink);
}
.signal-left h2 {
  font-family: var(--font-black);
  font-size: clamp(2.6rem, 5.5vw, 4.8rem);
  line-height: .95;
  letter-spacing: -.035em;
}
.signal-left h2 span { display: block; }
.signal-left h2 .serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 300;
  color: var(--verm);
  letter-spacing: -.02em;
}
.signal-right .lead {
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  line-height: 1.35;
  font-weight: 300;
  margin-bottom: 2rem;
  max-width: 34rem;
}
.signal-right .lead strong {
  font-weight: 600;
  font-style: italic;
  background: linear-gradient(transparent 60%, var(--lime) 60%);
}
.signal-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.signal-grid .n {
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--verm);
  display: block;
  margin-bottom: .45rem;
}
.signal-grid p {
  font-size: .92rem;
  font-weight: 500;
  color: var(--ink-soft);
}
.signal-watermark {
  position: absolute;
  right: -2%;
  bottom: -8%;
  font-family: var(--font-black);
  font-size: clamp(6rem, 18vw, 14rem);
  letter-spacing: -.05em;
  color: transparent;
  -webkit-text-stroke: 2px rgba(20,17,14,.07);
  pointer-events: none;
  line-height: .8;
  user-select: none;
}

/* ---------- FEATURES / sticky chapters ---------- */
.features {
  padding: clamp(4rem, 8vw, 6.5rem) var(--pad);
  background: var(--bone-2);
}
.features-head {
  max-width: 900px;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}
.features-head h2 {
  font-family: var(--font-black);
  font-size: clamp(2.5rem, 5.5vw, 4.4rem);
  line-height: .95;
  letter-spacing: -.035em;
}
.features-head h2 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 300;
  color: var(--verm);
}

.chapters {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
  max-width: 1180px;
  margin: 0 auto;
}
.chapter-card {
  display: grid;
  grid-template-columns: 80px 1.3fr 0.9fr;
  gap: 1.5rem;
  align-items: stretch;
  border: 2px solid var(--ink);
  border-radius: 22px;
  padding: clamp(1.4rem, 2.5vw, 2rem);
  background: var(--white);
  position: sticky;
  top: calc(var(--nav-h) + 14px);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
  box-shadow: 0 0 0 var(--ink);
}
.chapter-card:hover {
  transform: translateY(-3px);
  box-shadow: 8px 8px 0 var(--ink);
}
.chapter-card.c1 { top: calc(var(--nav-h) + 14px); z-index: 4; }
.chapter-card.c2 { top: calc(var(--nav-h) + 28px); z-index: 5; background: var(--forest); color: var(--bone); border-color: var(--forest-deep); }
.chapter-card.c3 { top: calc(var(--nav-h) + 42px); z-index: 6; background: var(--lime); }
.chapter-card.c4 { top: calc(var(--nav-h) + 56px); z-index: 7; background: var(--ink); color: var(--bone); }

.cc-index {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .6rem;
}
.cc-index span {
  font-family: var(--font-black);
  font-size: 1.6rem;
  letter-spacing: -.03em;
}
.cc-line {
  flex: 1;
  width: 2px;
  min-height: 40px;
  background: currentColor;
  opacity: .2;
}
.cc-body h3 {
  font-family: var(--font-black);
  font-size: clamp(1.6rem, 2.5vw, 2.1rem);
  letter-spacing: -.03em;
  margin-bottom: .7rem;
}
.cc-body p {
  font-weight: 500;
  font-size: .98rem;
  color: var(--ink-soft);
  margin-bottom: 1.1rem;
  max-width: 36rem;
}
.c2 .cc-body p,
.c4 .cc-body p { color: color-mix(in srgb, var(--bone) 72%, transparent); }

.cc-body ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}
.cc-body ul li {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .06em;
  padding: .38rem .65rem;
  border-radius: 999px;
  background: var(--ink);
  color: var(--bone);
}
.c2 .cc-body ul li { background: var(--lime); color: var(--ink); }
.c4 .cc-body ul li { background: var(--verm); color: var(--white); }

.modes {
  display: flex;
  gap: .45rem;
}
.modes span {
  flex: 1;
  text-align: center;
  font-weight: 700;
  font-size: .85rem;
  padding: .65rem;
  border: 2px solid var(--ink);
  border-radius: 10px;
}
.modes span.on {
  background: var(--ink);
  color: var(--lime);
}
.badges {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}
.badges span {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  padding: .38rem .6rem;
  border-radius: 8px;
  border: 1.5px solid color-mix(in srgb, var(--bone) 35%, transparent);
  color: var(--lime);
}

.cc-visual {
  display: grid;
  place-items: center;
  min-height: 140px;
}

/* library stack visual */
.lib-stack {
  width: 100%;
  max-width: 200px;
  display: flex;
  flex-direction: column;
  gap: .45rem;
}
.lib-row {
  display: grid;
  grid-template-columns: 28px 1fr .6fr;
  gap: .4rem;
  align-items: center;
  opacity: .45;
}
.lib-row.on { opacity: 1; }
.lib-row b {
  width: 28px; height: 28px;
  border-radius: 6px;
  background: var(--verm);
  display: block;
}
.lib-row.on b { background: var(--lime); box-shadow: 0 0 0 2px var(--ink); }
.lib-row i {
  display: block;
  height: 7px;
  border-radius: 4px;
  background: var(--ink);
  opacity: .18;
}
.lib-row.on i { opacity: .35; }

/* FM dial */
.fm-dial {
  width: 140px; height: 140px;
  border-radius: 50%;
  border: 3px solid color-mix(in srgb, var(--bone) 40%, transparent);
  position: relative;
  display: grid;
  place-items: center;
}
.fm-ring {
  position: absolute;
  inset: 14%;
  border-radius: 50%;
  border: 1.5px dashed color-mix(in srgb, var(--lime) 50%, transparent);
  animation: spin 12s linear infinite;
}
.fm-ring.r2 {
  inset: 28%;
  animation-direction: reverse;
  animation-duration: 8s;
  border-style: solid;
  border-color: var(--lime);
  opacity: .4;
}
.fm-dot {
  position: absolute;
  top: 8%;
  left: 50%;
  width: 10px; height: 10px;
  margin-left: -5px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 12px var(--lime);
}
.fm-dial span {
  font-family: var(--font-black);
  font-size: 1.4rem;
  color: var(--lime);
  letter-spacing: .05em;
}

/* transport */
.transport {
  display: flex;
  gap: .55rem;
  align-items: center;
}
.transport button {
  width: 48px; height: 48px;
  border-radius: 50%;
  border: 2px solid var(--ink);
  background: transparent;
  font-size: 1rem;
  cursor: none;
  transition: background .2s, color .2s, transform .2s;
}
.transport button.play {
  width: 64px; height: 64px;
  background: var(--ink);
  color: var(--lime);
  font-size: 1.2rem;
}
.transport button:hover { transform: scale(1.06); }

/* VU meters */
.vu {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 110px;
}
.vu-bar {
  width: 12px;
  height: var(--h);
  border-radius: 4px 4px 0 0;
  background: linear-gradient(to top, var(--verm), var(--lime));
  animation: vu 1.2s ease-in-out infinite alternate;
  transform-origin: bottom;
}
.vu-bar:nth-child(2) { animation-delay: .1s; }
.vu-bar:nth-child(3) { animation-delay: .2s; }
.vu-bar:nth-child(4) { animation-delay: .05s; }
.vu-bar:nth-child(5) { animation-delay: .25s; }
.vu-bar:nth-child(6) { animation-delay: .15s; }
.vu-bar:nth-child(7) { animation-delay: .3s; }
@keyframes vu {
  from { transform: scaleY(.45); }
  to { transform: scaleY(1); }
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- ENGINE ---------- */
.engine {
  position: relative;
  padding: clamp(4.5rem, 9vw, 7.5rem) var(--pad);
  background: var(--forest-deep);
  color: var(--bone);
  overflow: hidden;
}
.engine::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 40% at 85% 15%, rgba(198,240,74,.12), transparent),
    radial-gradient(ellipse 40% 35% at 10% 85%, rgba(226,61,40,.14), transparent);
  pointer-events: none;
}
.engine-top {
  position: relative;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 2rem;
  align-items: end;
  margin-bottom: clamp(2rem, 4vw, 3rem);
  max-width: 1180px;
  margin-left: auto;
  margin-right: auto;
}
.engine-top h2 {
  font-family: var(--font-black);
  font-size: clamp(2.6rem, 5.5vw, 4.6rem);
  line-height: .95;
  letter-spacing: -.035em;
}
.engine-top h2 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 300;
  color: var(--lime);
}
.engine-lead {
  font-weight: 500;
  color: color-mix(in srgb, var(--bone) 72%, transparent);
  font-size: 1.05rem;
  max-width: 28rem;
}

.engine-board {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .9rem;
  max-width: 1180px;
  margin: 0 auto;
}
.eb-card {
  background: color-mix(in srgb, var(--forest) 50%, transparent);
  border: 1px solid color-mix(in srgb, var(--lime) 22%, transparent);
  border-radius: 16px;
  padding: 1.4rem;
  backdrop-filter: blur(8px);
  transition: border-color .3s, transform .3s var(--ease);
}
.eb-card:hover {
  border-color: var(--lime);
  transform: translateY(-4px);
}
.eb-ico {
  display: block;
  color: var(--lime);
  font-size: 1.3rem;
  margin-bottom: .85rem;
}
.eb-card h4 {
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: .5rem;
}
.eb-card p {
  font-size: .9rem;
  font-weight: 500;
  color: color-mix(in srgb, var(--bone) 70%, transparent);
  line-height: 1.55;
}
.eb-card code { color: var(--lime); font-size: .85em; }

.eb-terminal {
  grid-column: 1 / -1;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--lime) 28%, transparent);
  background: #071510;
  box-shadow: 0 28px 60px rgba(0,0,0,.35);
  margin-top: .5rem;
}
.et-bar {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .7rem 1rem;
  background: color-mix(in srgb, var(--forest) 55%, #000);
  border-bottom: 1px solid color-mix(in srgb, var(--lime) 12%, transparent);
}
.et-bar span {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--verm);
}
.et-bar span:nth-child(2) { background: var(--clay); }
.et-bar span:nth-child(3) { background: var(--lime); }
.et-bar em {
  margin-left: .7rem;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .04em;
  color: color-mix(in srgb, var(--bone) 50%, transparent);
}
.eb-terminal pre {
  padding: 1.35rem 1.5rem 1.55rem;
  font-family: var(--font-mono);
  font-size: .88rem;
  line-height: 1.7;
  color: color-mix(in srgb, var(--bone) 85%, transparent);
  overflow-x: auto;
  min-height: 11rem;
}
.eb-terminal .k { color: var(--lime); }
.eb-terminal .s { color: #ffb4a8; }
.eb-terminal .n { color: var(--blue); }
.eb-terminal .b { color: var(--verm); font-weight: 700; }
.eb-terminal .cursor-blink {
  display: inline-block;
  width: 8px; height: 1em;
  background: var(--lime);
  vertical-align: text-bottom;
  margin-left: 2px;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink {
  50% { opacity: 0; }
}

/* ---------- FORMATS ---------- */
.formats {
  padding: clamp(4rem, 8vw, 6.5rem) 0;
  background: var(--bone);
  overflow: hidden;
}
.formats-head {
  padding: 0 var(--pad);
  margin-bottom: 2rem;
  max-width: 900px;
}
.formats-head h2 {
  font-family: var(--font-black);
  font-size: clamp(2.5rem, 5.5vw, 4.2rem);
  letter-spacing: -.035em;
  line-height: .95;
  margin-bottom: .7rem;
}
.formats-head p {
  color: var(--ink-soft);
  font-weight: 500;
}

.format-strip {
  overflow: hidden;
  margin-bottom: 2.5rem;
  mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
}
.format-track {
  display: flex;
  gap: .7rem;
  width: max-content;
  padding: .5rem var(--pad);
  animation: tick 40s linear infinite;
}
.format-track span {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(.9rem, 1.5vw, 1.15rem);
  padding: .85rem 1.25rem;
  border-radius: 14px;
  background: var(--white);
  border: 2px solid var(--ink);
  letter-spacing: .02em;
  transition: background .2s, color .2s, transform .2s;
  white-space: nowrap;
}
.format-track span:hover {
  background: var(--ink);
  color: var(--lime);
  transform: rotate(-3deg) scale(1.05);
}
.format-track span.hot {
  background: var(--verm);
  color: var(--white);
  border-color: var(--verm-deep);
}

.platforms {
  display: grid;
  grid-template-columns: 1.25fr 1fr 1fr;
  gap: .9rem;
  padding: 0 var(--pad);
  max-width: 1180px;
  margin: 0 auto;
}
.plat {
  border: 2px solid var(--ink);
  border-radius: 18px;
  padding: 1.5rem;
  background: var(--white);
}
.plat.primary {
  background: var(--ink);
  color: var(--bone);
}
.plat header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: .7rem;
}
.plat h3 {
  font-family: var(--font-black);
  font-size: 1.4rem;
  letter-spacing: -.02em;
}
.ptag {
  font-family: var(--font-mono);
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: .3rem .55rem;
  border-radius: 999px;
  background: var(--lime);
  color: var(--ink);
}
.ptag.mute { background: var(--bone-3); color: var(--ink-soft); }
.plat.primary .ptag { background: var(--verm); color: var(--white); }
.plat p {
  font-weight: 500;
  font-size: .92rem;
  color: var(--ink-soft);
  margin-bottom: 1rem;
}
.plat.primary p { color: color-mix(in srgb, var(--bone) 72%, transparent); }
.plat-bar {
  height: 6px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--ink) 10%, transparent);
  overflow: hidden;
}
.plat.primary .plat-bar { background: color-mix(in srgb, var(--bone) 15%, transparent); }
.plat-bar i {
  display: block;
  height: 100%;
  background: var(--lime);
  border-radius: 999px;
}
.plat.primary .plat-bar i { background: var(--verm); }

/* ---------- PLUGINS ---------- */
.plugins {
  padding: clamp(4rem, 8vw, 6.5rem) var(--pad);
  background:
    linear-gradient(180deg, var(--bone-2), var(--bone));
}
.plugins-head {
  max-width: 780px;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}
.plugins-head h2 {
  font-family: var(--font-black);
  font-size: clamp(2.5rem, 5.5vw, 4.2rem);
  line-height: .95;
  letter-spacing: -.035em;
  margin-bottom: .9rem;
}
.plugins-head h2 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 300;
  color: var(--verm);
}
.plugins-head p {
  font-weight: 500;
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 36rem;
}
.rails {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem;
  max-width: 1100px;
}
.rail {
  border: 2px solid var(--ink);
  border-radius: 22px;
  padding: clamp(1.5rem, 3vw, 2.2rem);
  background: var(--white);
  position: relative;
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.rail:hover {
  transform: translateY(-4px);
  box-shadow: 10px 10px 0 var(--ink);
}
.rail.dsp {
  background: var(--ink);
  color: var(--bone);
}
.rail-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.2rem;
}
.rbadge {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .12em;
  padding: .35rem .7rem;
  border-radius: 999px;
  background: var(--lime);
  color: var(--ink);
}
.rail.dsp .rbadge { background: var(--verm); color: var(--white); }
.rnum {
  font-family: var(--font-black);
  font-size: 3rem;
  line-height: 1;
  letter-spacing: -.04em;
  opacity: .12;
}
.rail h3 {
  font-family: var(--font-black);
  font-size: 1.9rem;
  letter-spacing: -.03em;
  margin-bottom: 1.25rem;
}
.rail ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.rail li {
  font-weight: 500;
  font-size: .95rem;
  color: var(--ink-soft);
  padding-left: 1.15rem;
  position: relative;
  line-height: 1.5;
}
.rail li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--verm);
  font-weight: 700;
}
.rail.dsp li {
  color: color-mix(in srgb, var(--bone) 70%, transparent);
}
.rail.dsp li::before { color: var(--lime); }
.rail li strong {
  display: block;
  color: var(--ink);
  font-weight: 700;
  margin-bottom: .15rem;
}
.rail.dsp li strong { color: var(--bone); }
.rail footer {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .03em;
  color: var(--ink-mute);
  border-top: 1px solid var(--bone-3);
  padding-top: 1rem;
}
.rail.dsp footer {
  color: color-mix(in srgb, var(--bone) 45%, transparent);
  border-top-color: color-mix(in srgb, var(--bone) 12%, transparent);
}

/* ---------- STACK ---------- */
.stack {
  padding: clamp(3.5rem, 7vw, 5.5rem) 0;
  border-top: 2px solid var(--ink);
}
.stack-head {
  padding: 0 var(--pad);
  margin-bottom: 1.5rem;
}
.stack-head h2 {
  font-family: var(--font-black);
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  letter-spacing: -.03em;
}
.stack-marquee {
  overflow: hidden;
  margin-bottom: 1.75rem;
  border-top: 1px solid var(--bone-3);
  border-bottom: 1px solid var(--bone-3);
  padding: .9rem 0;
}
.stack-track {
  display: flex;
  gap: 2rem;
  width: max-content;
  font-family: var(--font-black);
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  letter-spacing: -.02em;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--ink);
  animation: tick 28s linear infinite;
  opacity: .5;
}
.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--ink);
  border: 2px solid var(--ink);
  border-radius: 20px;
  overflow: hidden;
  max-width: 1100px;
  margin: 0 auto;
  width: calc(100% - 2 * var(--pad));
}
.stack-grid > div {
  background: var(--bone);
  padding: 1.6rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: .3rem;
  transition: background .25s;
}
.stack-grid > div:hover { background: var(--lime); }
.stack-grid em {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 700;
}
.stack-grid strong {
  font-family: var(--font-black);
  font-size: 1.3rem;
  letter-spacing: -.02em;
}
.stack-grid span {
  font-weight: 500;
  color: var(--ink-soft);
  font-size: .9rem;
}

/* ---------- DOWNLOAD ---------- */
.download {
  padding: clamp(3rem, 6vw, 5rem) var(--pad) clamp(4rem, 8vw, 6.5rem);
}
.dl-wrap {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 2rem;
  align-items: center;
  background: var(--lime);
  border: 3px solid var(--ink);
  border-radius: 28px;
  padding: clamp(2rem, 4.5vw, 3.2rem);
  box-shadow: 14px 14px 0 var(--ink);
  position: relative;
  overflow: hidden;
}
.dl-stamp {
  position: absolute;
  right: -2%;
  top: 50%;
  transform: translateY(-50%) rotate(-90deg);
  font-family: var(--font-black);
  font-size: clamp(4rem, 10vw, 7rem);
  letter-spacing: -.04em;
  color: transparent;
  -webkit-text-stroke: 2px rgba(20,17,14,.1);
  pointer-events: none;
  user-select: none;
}
.dl-copy { position: relative; z-index: 1; }
.dl-copy h2 {
  font-family: var(--font-black);
  font-size: clamp(2.5rem, 5vw, 3.8rem);
  line-height: .95;
  letter-spacing: -.035em;
  margin-bottom: 1rem;
}
.dl-copy h2 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 300;
  color: var(--verm-deep);
}
.dl-copy > p {
  font-weight: 500;
  color: var(--ink-soft);
  max-width: 28rem;
  margin-bottom: 1.5rem;
}
.dl-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.1rem;
}
.dl-code {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--ink-soft);
}
.dl-code code {
  background: rgba(20,17,14,.08);
  padding: .2rem .45rem;
  border-radius: 4px;
}
.dl-mark {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  min-height: 240px;
}
.dl-mark img {
  width: min(200px, 48vw);
  border-radius: 28%;
  border: 3px solid var(--ink);
  box-shadow: 8px 8px 0 var(--ink);
  background: var(--white);
  position: relative;
  z-index: 2;
}
.dl-ring {
  position: absolute;
  width: min(260px, 58vw);
  aspect-ratio: 1;
  border-radius: 50%;
  border: 2px dashed var(--ink);
  opacity: .3;
  animation: spin 22s linear infinite;
}
.dl-ring.r2 {
  width: min(310px, 68vw);
  opacity: .15;
  animation-direction: reverse;
  animation-duration: 30s;
  border-style: solid;
}

/* ---------- CUSTOM CONTEXT MENU ---------- */
.ctx-menu {
  position: fixed;
  z-index: 10000;
  min-width: 220px;
  background: var(--ink);
  color: var(--bone);
  border: 2px solid var(--bone-3);
  border-radius: 12px;
  padding: .45rem;
  box-shadow: 8px 8px 0 rgba(20,17,14,.35);
  opacity: 0;
  visibility: hidden;
  transform: scale(.92) translateY(-4px);
  transform-origin: top left;
  transition: opacity .18s var(--ease), transform .18s var(--ease), visibility .18s;
  font-family: var(--font-sans);
}
.ctx-menu.show {
  opacity: 1;
  visibility: visible;
  transform: scale(1) translateY(0);
}
.ctx-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: .5rem .7rem .6rem;
  border-bottom: 1px solid color-mix(in srgb, var(--bone) 15%, transparent);
  margin-bottom: .35rem;
}
.ctx-head span {
  font-family: var(--font-black);
  font-size: .72rem;
  letter-spacing: .08em;
}
.ctx-head em {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: .62rem;
  color: var(--lime);
}
.ctx-menu button {
  display: block;
  width: 100%;
  padding: .55rem .7rem;
  background: transparent;
  border: 0;
  border-radius: 8px;
  color: color-mix(in srgb, var(--bone) 85%, transparent);
  font: inherit;
  font-size: .88rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: background .15s, color .15s, transform .15s;
}
.ctx-menu button[hidden] { display: none; }
.ctx-sep[hidden] { display: none; }
.ctx-menu button:hover {
  background: var(--lime);
  color: var(--ink);
  transform: translateX(2px);
}
/* 每项之间虚线分割线 */
.ctx-menu button:not([hidden]) + button:not([hidden]),
.ctx-menu button:not([hidden]) + .ctx-sep:not([hidden]),
.ctx-sep:not([hidden]) + button:not([hidden]) {
  border-top: 1px dashed color-mix(in srgb, var(--bone) 25%, transparent);
  border-radius: 0;
}
.ctx-sep {
  height: 1px;
  background: transparent;
  border-top: 1px dashed color-mix(in srgb, var(--bone) 25%, transparent);
  margin: .35rem .3rem;
}

/* ---------- LINUX DOWNLOAD (click to expand) ---------- */
.dl-linux {
  margin-top: 1.4rem;
  border: 2px solid var(--ink);
  border-radius: 16px;
  background: var(--white);
  overflow: hidden;
  max-width: 30rem;
}
.dl-linux-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .9rem 1.1rem;
  background: transparent;
  border: 0;
  cursor: pointer;
  font: inherit;
  color: var(--ink);
  text-align: left;
  transition: background .2s;
}
.dl-linux-toggle:hover { background: color-mix(in srgb, var(--lime) 30%, transparent); }
.dl-linux-ico { font-size: 1.15rem; line-height: 1; }
.dl-linux-label {
  font-weight: 700;
  font-size: .98rem;
  letter-spacing: -.01em;
  flex: 1;
}
.dl-linux-ver {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .06em;
  padding: .25rem .55rem;
  border-radius: 999px;
  background: var(--lime);
  color: var(--ink);
}
.dl-linux-arrow {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--verm);
  transition: transform .3s var(--ease);
}
.dl-linux.open .dl-linux-arrow { transform: rotate(180deg); }

.dl-linux-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height .45s var(--ease);
}
.dl-linux.open .dl-linux-panel { max-height: 420px; }

/* 在移动端允许面板扩展或滚动，确保所有下载项可见 */
.dl-linux.open .dl-linux-panel {
  max-height: 80vh;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 0.6rem;
}

.dl-linux-note {
  font-size: .85rem;
  font-weight: 500;
  color: var(--ink-soft);
  padding: 0 1.1rem .6rem;
}
.dl-linux-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .6rem;
  padding: 0 1.1rem 1.1rem;
}
.dl-linux-item {
  display: flex;
  flex-direction: column;
  gap: .2rem;
  border: 2px solid var(--ink);
  border-radius: 12px;
  padding: .8rem .9rem;
  background: var(--bone);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s;
}
.dl-linux-item:hover {
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--ink);
  background: var(--lime);
}
.dli-ext {
  font-family: var(--font-black);
  font-size: 1.05rem;
  letter-spacing: -.02em;
}
.dli-name {
  font-weight: 600;
  font-size: .82rem;
  color: var(--ink-soft);
}
.dli-cmd {
  font-family: var(--font-mono);
  font-size: .66rem;
  color: var(--ink-mute);
}
.dli-go {
  margin-top: .35rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--verm);
}

@media (max-width: 480px) {
  .dl-linux-grid { grid-template-columns: 1fr; }
}

/* ---------- FOOTER ---------- */
.footer {
  background: var(--ink);
  color: var(--bone);
  padding: 0 var(--pad) 2rem;
  overflow: hidden;
}
.footer-mega {
  font-family: var(--font-black);
  font-size: clamp(2.8rem, 10vw, 8rem);
  letter-spacing: -.04em;
  line-height: .9;
  color: transparent;
  -webkit-text-stroke: 1.5px color-mix(in srgb, var(--bone) 18%, transparent);
  padding: 2.5rem 0 1.5rem;
  white-space: nowrap;
  user-select: none;
}
.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 2.5rem;
  flex-wrap: wrap;
  max-width: 1200px;
  margin: 0 auto 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid color-mix(in srgb, var(--bone) 12%, transparent);
}
.footer-brand {
  display: flex;
  gap: .85rem;
  align-items: center;
}
.footer-brand img { border-radius: 10px; }
.footer-brand strong {
  display: block;
  font-size: 1.1rem;
  letter-spacing: -.02em;
}
.footer-brand span {
  font-size: .85rem;
  color: color-mix(in srgb, var(--bone) 50%, transparent);
  font-weight: 500;
}
.footer-cols {
  display: flex;
  gap: clamp(2rem, 5vw, 3.5rem);
}
.footer-cols h5 {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--lime);
  margin-bottom: .85rem;
  font-weight: 700;
}
.footer-cols a {
  display: block;
  font-weight: 500;
  font-size: .92rem;
  color: color-mix(in srgb, var(--bone) 65%, transparent);
  margin-bottom: .45rem;
  transition: color .2s;
}
.footer-cols a:hover { color: var(--lime); }
.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: .85rem;
  color: color-mix(in srgb, var(--bone) 40%, transparent);
  font-weight: 500;
}
.footer-bottom .mono {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
}

/* ---------- reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .85s var(--ease), transform .85s var(--ease);
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* ---------- responsive ---------- */
@media (max-width: 1024px) {
  .hero-bottom { grid-template-columns: 1fr; }
  .hero-oscope { order: -1; }
  .signal { grid-template-columns: 1fr; }
  .signal-grid { grid-template-columns: 1fr; }
  .chapter-card { grid-template-columns: 60px 1fr; }
  .cc-visual { display: none; }
  .engine-top { grid-template-columns: 1fr; }
  .engine-board { grid-template-columns: 1fr 1fr; }
  .platforms { grid-template-columns: 1fr; }
  .rails { grid-template-columns: 1fr; }
  .stack-grid { grid-template-columns: 1fr 1fr; }
  .dl-wrap { grid-template-columns: 1fr; }
  .dl-mark { order: -1; min-height: 200px; }
  .hero-stats-bar { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 780px) {
  body { cursor: auto; }
  .cursor { display: none; }
  .nav { grid-template-columns: 1fr auto; }
  .nav-center { display: none; }
  .nav-actions .nav-link { display: none; }
  .nav-actions .btn-mag { display: none; }
  .burger { display: flex; }
  /* Hide explicit download targets by default on desktop; show when mobile menu opens */
  .nav-actions .dl-mobile { display: none; }
  .nav.open .nav-actions {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: calc(var(--nav-h) + 8px);
    right: var(--pad);
    left: auto;
    min-width: 200px;
    background: var(--bone);
    padding: .9rem;
    border: 2px solid var(--ink);
    border-radius: 16px;
    box-shadow: 6px 6px 0 var(--ink);
    gap: .5rem;
  }
  .nav.open .nav-actions .dl-mobile { display: inline-flex; }
  .nav.open .nav-actions .nav-link { display: block; }
  .nav.open .nav-actions .btn-mag { display: inline-flex; }
  .nav.open .nav-actions .nav-link,
  .nav.open .nav-actions .btn-mag {
    padding: .6rem .9rem;
    border-radius: 10px;
    text-align: center;
  }
  .nav.open .nav-actions .nav-link:hover { background: var(--lime); }
  .mega-fill, .mega-outline { font-size: clamp(3.2rem, 16vw, 5rem); }
  .chapter-card {
    grid-template-columns: 1fr;
    position: relative !important;
    top: auto !important;
  }
  .cc-index { flex-direction: row; align-items: center; }
  .cc-line { width: 40px; height: 2px; min-height: 0; }
  .engine-board { grid-template-columns: 1fr; }
  .stack-grid { grid-template-columns: 1fr; }
  .hero-chips { grid-template-columns: 1fr; }
  .hero-stats-bar { grid-template-columns: 1fr 1fr; }
  .hero-stats-bar > div { padding: .9rem 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .ticker-track, .format-track, .stack-track { animation: none !important; }
}