:root {
  --bg: #0b0f14;
  --bg-2: #10161e;
  --card: #131b25;
  --card-2: #17212d;
  --line: rgba(255, 255, 255, 0.08);
  --line-2: rgba(255, 255, 255, 0.16);
  --text: #e8eef5;
  --muted: #93a1b3;
  --green: #62e6a7;
  --blue: #7aa8ff;
  --violet: #b48cff;
  --radius: 18px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --max: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  --header-h: 108px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 17px/1.65 Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; }
h1, h2, h3, h4 { line-height: 1.12; letter-spacing: -0.025em; margin: 0 0 0.5em; }
h1 { font-size: clamp(2.5rem, 5.6vw, 4.6rem); font-weight: 800; }
h2 { font-size: clamp(1.9rem, 3.8vw, 2.9rem); font-weight: 800; }
h3 { font-size: 1.3rem; font-weight: 700; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
::selection { background: var(--green); color: #04110a; }
:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; border-radius: 6px; }
.skip { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--green); color: #04110a; padding: 10px 16px; border-radius: 10px; font-weight: 600; }
.skip:focus { top: 12px; }

/* progress + cursor glow */
.progress { position: fixed; inset: 0 0 auto; height: 3px; z-index: 70; pointer-events: none; }
.progress span { display: block; height: 100%; transform-origin: 0 50%; transform: scaleX(0);
  background: linear-gradient(90deg, var(--green), var(--blue), var(--violet)); }
.glow { position: fixed; width: 520px; height: 520px; border-radius: 50%; pointer-events: none; z-index: 0; left: 0; top: 0;
  opacity: 0; transition: opacity .6s; background: radial-gradient(circle, rgba(98, 230, 167, 0.08), transparent 65%); }
@media (hover: hover) { body:hover .glow { opacity: 1; } }

/* ---------- header ---------- */
.site-header { position: fixed; inset: 0 0 auto; z-index: 50; }
.announce { overflow: hidden; max-height: 44px; transition: max-height .45s var(--ease), opacity .3s;
  background: linear-gradient(90deg, rgba(98,230,167,.14), rgba(122,168,255,.14), rgba(180,140,255,.14)); border-bottom: 1px solid var(--line); }
.site-header.is-scrolled .announce, .announce.is-closed { max-height: 0; opacity: 0; }
.announce-inner { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); height: 44px; display: flex; align-items: center; justify-content: center; position: relative; }
.announce a { text-decoration: none; font-size: .88rem; display: flex; align-items: center; gap: 10px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: calc(100% - 40px); }
.announce a:hover #announceText { text-decoration: underline; text-underline-offset: 3px; }
#announceText { overflow: hidden; text-overflow: ellipsis; }
.pill { flex: none; font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; padding: 3px 9px; border-radius: 999px; background: var(--green); color: #04110a; }
.announce-close { position: absolute; right: var(--gutter); background: none; border: 0; color: var(--muted); font-size: 1.3rem; cursor: pointer; width: 32px; height: 32px; border-radius: 8px; }
.announce-close:hover { color: var(--text); background: rgba(255,255,255,.06); }

.nav { position: relative; display: flex; align-items: center; justify-content: space-between; padding: 14px var(--gutter);
  transition: padding .4s; border-bottom: 1px solid transparent; }
/* blur lives on a pseudo-element so the nav never becomes a containing block for the fixed mobile menu */
.nav::before { content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0; transition: opacity .4s;
  background: rgba(11, 15, 20, 0.78); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.site-header.is-scrolled .nav { padding-block: 10px; border-color: var(--line); }
.site-header.is-scrolled .nav::before, .site-header.is-mega .nav::before { opacity: 1; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 1.15rem; text-decoration: none; position: relative; z-index: 2; }
.brand b { color: var(--green); font-weight: 800; }
.brand-mark { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 10px; color: var(--green);
  background: linear-gradient(140deg, rgba(98,230,167,.18), rgba(122,168,255,.18)); border: 1px solid var(--line); }
.brand-mark svg { width: 20px; height: 20px; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-link { display: inline-flex; align-items: center; gap: 6px; text-decoration: none; color: var(--muted); font-size: .95rem; font-weight: 500;
  padding: 9px 14px; border-radius: 10px; transition: color .25s, background .25s; }
.nav-link:hover, .nav-link.is-current { color: var(--text); background: rgba(255,255,255,.05); }
.nav-links .btn { margin-left: 10px; }
.chev { width: 12px; height: 12px; transition: transform .3s var(--ease); }

/* mega menu */
.mega { position: absolute; left: 50%; top: 100%; width: min(1040px, calc(100vw - 2 * var(--gutter))); padding-top: 10px;
  transform: translate(-50%, 8px); opacity: 0; visibility: hidden; transition: opacity .3s var(--ease), transform .35s var(--ease), visibility .3s;
  display: grid; grid-template-columns: 1fr 300px; }
.mega::before { content: ""; position: absolute; inset: 10px 0 0; border-radius: 20px; background: rgba(16, 22, 30, .97); border: 1px solid var(--line-2);
  box-shadow: 0 30px 80px -20px rgba(0,0,0,.7); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); z-index: -1; }
.has-mega:hover .mega, .has-mega:focus-within .mega { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.has-mega:hover .chev, .has-mega:focus-within .chev { transform: rotate(180deg); }
.mega-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; padding: 22px; }
.mega-item { display: flex; gap: 14px; padding: 14px; border-radius: 14px; text-decoration: none; transition: background .25s; }
.mega-item:hover, .mega-item:focus-visible { background: rgba(255,255,255,.05); }
.mega-item strong { display: block; font-size: .95rem; margin-bottom: 2px; }
.mega-item span { color: var(--muted); font-size: .84rem; line-height: 1.45; }
.mega-feature { margin: 22px 22px 22px 0; padding: 22px; border-radius: 16px; display: flex; flex-direction: column;
  background: radial-gradient(120% 90% at 100% 0%, rgba(98,230,167,.18), transparent 60%), var(--card); border: 1px solid var(--line); }
.mega-feature h4 { font-size: 1.05rem; margin: 8px 0 8px; }
.mega-feature p { color: var(--muted); font-size: .86rem; line-height: 1.5; }
.mega-feature .link-arrow { margin-top: auto; font-size: .9rem; }
.ico { flex: none; width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; color: var(--green);
  background: rgba(98,230,167,.1); border: 1px solid rgba(98,230,167,.22); }
.ico svg, .step-icon svg, .search svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.burger { display: none; width: 44px; height: 44px; background: none; border: 1px solid var(--line); border-radius: 12px; cursor: pointer; position: relative; z-index: 2; }
.burger span { position: absolute; left: 12px; right: 12px; height: 2px; background: var(--text); transition: transform .35s var(--ease), top .35s var(--ease); }
.burger span:first-child { top: 17px; } .burger span:last-child { top: 25px; }
.burger[aria-expanded="true"] span:first-child { top: 21px; transform: rotate(45deg); }
.burger[aria-expanded="true"] span:last-child { top: 21px; transform: rotate(-45deg); }

/* ---------- buttons & links ---------- */
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 24px; border-radius: 999px; font-weight: 600; text-decoration: none; white-space: nowrap;
  color: #04110a; background: linear-gradient(120deg, var(--green), #8ff0c4); border: 0; cursor: pointer;
  box-shadow: 0 10px 30px -10px rgba(98, 230, 167, .55); transition: transform .35s var(--ease), box-shadow .35s; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -12px rgba(98, 230, 167, .75); }
.btn span { transition: transform .35s var(--ease); }
.btn:hover span { transform: translateX(4px); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--line-2); box-shadow: none; }
.btn-ghost:hover { background: rgba(255,255,255,.05); box-shadow: none; }
.btn-sm { padding: 9px 18px; font-size: .9rem; }
.btn-lg { padding: 18px 32px; font-size: 1.08rem; }
.link-arrow { display: inline-flex; gap: 8px; align-items: center; color: var(--green); font-weight: 600; text-decoration: none; }
.link-arrow span { transition: transform .35s var(--ease); }
.link-arrow:hover span { transform: translateX(4px); }

/* ---------- hero ---------- */
.hero { position: relative; min-height: 100svh; display: grid; align-items: center; padding: calc(var(--header-h) + 40px) var(--gutter) 90px; overflow: hidden; isolation: isolate; }
.grid-bg { position: absolute; inset: -2px; z-index: -1; opacity: .5;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px; mask-image: radial-gradient(ellipse 75% 65% at 60% 45%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 60% 45%, #000 30%, transparent 75%);
  animation: gridMove 24s linear infinite; }
@keyframes gridMove { to { background-position: 64px 64px; } }
.orb { position: absolute; border-radius: 50%; filter: blur(80px); z-index: -1; opacity: .5; }
.orb-a { width: 46vmax; height: 46vmax; background: radial-gradient(circle, rgba(98,230,167,.5), transparent 60%); top: -18vmax; left: -12vmax; animation: float 18s ease-in-out infinite; }
.orb-b { width: 40vmax; height: 40vmax; background: radial-gradient(circle, rgba(122,168,255,.45), transparent 60%); bottom: -16vmax; right: -10vmax; animation: float 22s ease-in-out infinite reverse; }
@keyframes float { 50% { transform: translate(6vmax, 4vmax) scale(1.08); } }
.hero-inner { max-width: var(--max); width: 100%; margin: 0 auto; display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(30px, 5vw, 70px); align-items: center; }
.hero-copy > * { opacity: 0; transform: translateY(24px); animation: rise 1s var(--ease) forwards; }
.hero-copy > *:nth-child(2) { animation-delay: .12s; }
.hero-copy > *:nth-child(3) { animation-delay: .24s; }
.hero-copy > *:nth-child(4) { animation-delay: .36s; }
@keyframes rise { to { opacity: 1; transform: none; } }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; padding: 8px 16px; border-radius: 999px; border: 1px solid var(--line);
  background: rgba(255,255,255,.03); color: var(--muted); font-size: .88rem; margin-bottom: 26px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); animation: pulseDot 2s infinite; }
@keyframes pulseDot { 0% { box-shadow: 0 0 0 0 rgba(98,230,167,.7); } 70%, 100% { box-shadow: 0 0 0 10px rgba(98,230,167,0); } }
.grad { background: linear-gradient(100deg, var(--green), var(--blue) 55%, var(--violet)); -webkit-background-clip: text; background-clip: text; color: transparent;
  -webkit-text-fill-color: transparent; display: inline-block; padding-bottom: .08em; transition: opacity .4s, transform .4s var(--ease); }
.grad.is-out { opacity: 0; transform: translateY(-14px); }
.lead { font-size: clamp(1.05rem, 1.6vw, 1.22rem); color: var(--muted); max-width: 580px; margin-bottom: 34px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-visual { position: relative; opacity: 0; animation: rise 1.2s .3s var(--ease) forwards; transform: translateY(24px); }
.diagram { width: 100%; height: auto; display: block; overflow: visible; }
.diagram .ring { fill: none; stroke: var(--line); stroke-dasharray: 2 8; animation: spin 60s linear infinite; transform-origin: 260px 230px; }
.diagram .ring-2 { animation-direction: reverse; animation-duration: 40s; }
.diagram .wires use { stroke: url(#wire); stroke-width: 1.6; stroke-dasharray: 6 8; opacity: .55; animation: dash 1.6s linear infinite; }
@keyframes dash { to { stroke-dashoffset: -28; } }
@keyframes spin { to { transform: rotate(360deg); } }
.diagram .packets circle { fill: #c9fbe2; filter: drop-shadow(0 0 6px var(--green)); }
.diagram .core circle { fill: #0f1a17; stroke: var(--green); stroke-width: 2; }
.diagram .core text { fill: var(--text); font: 700 15px Inter, sans-serif; text-anchor: middle; letter-spacing: .04em; }
.diagram .core-glow { opacity: .35; }
.diagram .pulse { fill: none; stroke: var(--green); stroke-width: 1.5; transform-origin: 260px 230px; animation: ripple 3s var(--ease) infinite; }
.diagram .pulse-2 { animation-delay: 1.5s; }
@keyframes ripple { from { transform: scale(1); opacity: .7; } to { transform: scale(2.2); opacity: 0; } }
.diagram .node rect { fill: var(--card); stroke: var(--line-2); transition: stroke .3s, fill .3s; }
.diagram .node text { fill: var(--text); font: 600 13.5px Inter, sans-serif; text-anchor: middle; }
.diagram .node { animation: bob 6s ease-in-out infinite; }
.diagram .n2 { animation-delay: -1s; } .diagram .n3 { animation-delay: -2s; } .diagram .n4 { animation-delay: -3s; } .diagram .n5 { animation-delay: -4s; } .diagram .n6 { animation-delay: -5s; }
.diagram .node.is-lit rect { stroke: var(--green); fill: #14251f; }
@keyframes bob { 50% { transform: translateY(-6px); } }
.float-card { position: relative; display: block; width: fit-content; max-width: 100%; margin: 0 auto; text-align: center; padding: 14px 18px; border-radius: 16px; text-decoration: none;
  background: rgba(19, 27, 37, .85); border: 1px solid var(--line-2); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 20px 50px -20px rgba(0,0,0,.7); animation: bob 7s ease-in-out infinite; transition: border-color .3s; }
.float-card:hover { border-color: var(--green); }
.float-kicker { display: block; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--green); margin-bottom: 4px; }
.float-card strong { font-size: .95rem; line-height: 1.35; display: block; }
.scroll-hint { position: absolute; bottom: 26px; left: 50%; translate: -50% 0; width: 26px; height: 42px; border: 2px solid var(--line-2); border-radius: 14px; }
.scroll-hint span { position: absolute; left: 50%; top: 8px; width: 4px; height: 8px; margin-left: -2px; border-radius: 2px; background: var(--green); animation: wheel 1.8s infinite; }
@keyframes wheel { 0% { opacity: 0; transform: translateY(0); } 30% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }

/* marquee */
.marquee { border-block: 1px solid var(--line); overflow: hidden; padding: 20px 0; background: var(--bg-2); position: relative; z-index: 1; }
.marquee-track { display: flex; gap: 56px; width: max-content; animation: marquee 38s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span { font-family: "JetBrains Mono", monospace; color: var(--muted); font-size: 1rem; white-space: nowrap; }
.marquee-track span::before { content: "◆"; color: var(--green); margin-right: 56px; font-size: .7em; vertical-align: middle; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- sections ---------- */
.section { max-width: var(--max); margin: 0 auto; padding: clamp(80px, 11vw, 130px) var(--gutter); position: relative; z-index: 1; }
.section-tint { max-width: none; background: linear-gradient(180deg, transparent, var(--bg-2) 18%, var(--bg-2) 82%, transparent); }
.section-inner { max-width: var(--max); margin: 0 auto; }
.kicker { font-family: "JetBrains Mono", monospace; color: var(--green); font-size: .82rem; letter-spacing: .06em; text-transform: uppercase; margin-bottom: 14px; }
.sub { color: var(--muted); max-width: 600px; }
.row-head { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin-bottom: 40px; flex-wrap: wrap; }
.row-head h2 { margin-bottom: .2em; }
.row-head .sub { margin-bottom: 0; }

.reveal { opacity: 0; transform: translateY(36px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal[data-delay="1"] { transition-delay: .1s; }
.reveal[data-delay="2"] { transition-delay: .2s; }
.reveal[data-delay="3"] { transition-delay: .3s; }
.reveal.is-in { opacity: 1; transform: none; }

/* tags */
.tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tag { font-size: .74rem; font-weight: 600; padding: 4px 10px; border-radius: 999px; background: rgba(255,255,255,.05); border: 1px solid var(--line); color: var(--muted); }
.tag-lang { color: var(--blue); border-color: rgba(122,168,255,.3); }

/* ---------- featured editions ---------- */
.featured-grid { display: grid; grid-template-columns: 1.35fr 1fr; gap: 28px; align-items: start; }
.feature-card { display: flex; flex-direction: column; border-radius: 24px; overflow: hidden; text-decoration: none; background: var(--card); border: 1px solid var(--line);
  position: relative; isolation: isolate; transition: transform .5s var(--ease), border-color .4s; }
.feature-card::after { content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none; opacity: 0; transition: opacity .5s;
  background: radial-gradient(500px circle at var(--mx, 50%) var(--my, 0%), rgba(98,230,167,.12), transparent 60%); }
.feature-card:hover { border-color: rgba(98,230,167,.35); }
.feature-card:hover::after { opacity: 1; }
.art { position: relative; aspect-ratio: 16 / 8; overflow: hidden;
  background: radial-gradient(80% 120% at 0% 100%, rgba(98,230,167,.35), transparent 60%), radial-gradient(80% 120% at 100% 0%, rgba(122,168,255,.35), transparent 55%),
  radial-gradient(60% 80% at 70% 90%, rgba(180,140,255,.25), transparent 60%), #0e151d; background-size: 140% 140%; animation: mesh 14s ease-in-out infinite alternate; }
@keyframes mesh { to { background-position: 100% 100%; } }
.art svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.art-lines path { fill: none; stroke: rgba(255,255,255,.35); stroke-width: 1.4; stroke-dasharray: 600; stroke-dashoffset: 600; }
.feature-card.is-in .art-lines path { animation: draw 2.4s var(--ease) forwards; }
.feature-card.is-in .art-lines path:nth-child(2) { animation-delay: .2s; stroke: rgba(98,230,167,.6); }
.feature-card.is-in .art-lines path:nth-child(3) { animation-delay: .4s; stroke: rgba(122,168,255,.5); }
@keyframes draw { to { stroke-dashoffset: 0; } }
.art-dots circle { fill: #fff; opacity: 0; }
.feature-card.is-in .art-dots circle { animation: pop .6s 1.6s var(--ease) forwards; }
.feature-card.is-in .art-dots circle:nth-child(2) { animation-delay: 1.8s; }
.feature-card.is-in .art-dots circle:nth-child(3) { animation-delay: 2s; }
@keyframes pop { from { opacity: 0; transform: scale(0); } to { opacity: .9; transform: none; } }
.art-dots circle { transform-box: fill-box; transform-origin: center; }
.art-badge { position: absolute; left: 20px; top: 20px; font-size: .74rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; padding: 6px 12px; border-radius: 999px;
  background: rgba(11,15,20,.7); border: 1px solid var(--line-2); backdrop-filter: blur(8px); }
.feature-body { padding: clamp(22px, 3vw, 34px); position: relative; z-index: 2; }
.feature-body h3 { font-size: clamp(1.5rem, 2.6vw, 2rem); margin: 16px 0 10px; }
.feature-body p { color: var(--muted); }
.meta { display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: .88rem; border-top: 1px solid var(--line); padding-top: 16px; margin-top: 4px; }
.read { color: var(--green); font-weight: 600; transition: transform .35s var(--ease); }
a:hover .read { transform: translateX(4px); }

.side-col { display: grid; gap: 22px; }
.ed-list { display: grid; }
.ed-item a { display: grid; grid-template-columns: 1fr auto; gap: 6px 16px; padding: 18px 4px; border-bottom: 1px solid var(--line); text-decoration: none; transition: padding .35s var(--ease); }
.ed-item:first-child a { padding-top: 4px; }
.ed-item a:hover { padding-left: 12px; }
.ed-item h4 { font-size: 1.02rem; line-height: 1.35; margin: 0; letter-spacing: -.01em; transition: color .25s; }
.ed-item a:hover h4 { color: var(--green); }
.ed-item .arrow { grid-row: span 2; align-self: center; color: var(--muted); transition: transform .35s var(--ease), color .25s; }
.ed-item a:hover .arrow { transform: translateX(4px); color: var(--green); }
.ed-item .ed-meta { font-size: .82rem; color: var(--muted); display: flex; gap: 10px; align-items: center; }
.sub-card { padding: 24px; border-radius: 20px; border: 1px solid rgba(98,230,167,.25);
  background: radial-gradient(120% 120% at 100% 0%, rgba(98,230,167,.16), transparent 55%), var(--card); }
.sub-card h3 { font-size: 1.15rem; }
.sub-card p:not(.kicker) { color: var(--muted); font-size: .92rem; }

/* ---------- columns ---------- */
.columns { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border: 1px solid var(--line); border-radius: 24px; overflow: hidden; background: var(--card); }
.col { padding: 28px 24px; border-right: 1px solid var(--line); display: flex; flex-direction: column; position: relative; transition: background .4s; }
.col:last-child { border-right: 0; }
.col::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 3px; background: var(--accent, var(--green)); transform: scaleX(0); transform-origin: left; transition: transform .6s var(--ease); }
.col:hover { background: var(--card-2); }
.col:hover::before, .col.is-in::before { transform: scaleX(1); }
.col-head { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.col-head h3 { font-size: 1.08rem; margin: 0; }
.col .ico { color: var(--accent, var(--green)); }
.col-desc { color: var(--muted); font-size: .9rem; margin-bottom: 20px; }
.col-lead { display: block; text-decoration: none; padding: 16px; border-radius: 14px; background: rgba(255,255,255,.03); border: 1px solid var(--line); margin-bottom: 14px; transition: border-color .3s, transform .4s var(--ease); }
.col-lead:hover { border-color: var(--line-2); transform: translateY(-3px); }
.col-lead strong { display: block; font-size: .98rem; line-height: 1.35; margin-bottom: 6px; }
.col-lead span { color: var(--muted); font-size: .84rem; line-height: 1.5; display: block; }
.col-more { display: grid; gap: 2px; margin-bottom: 18px; }
.col-more a { display: block; font-size: .9rem; text-decoration: none; color: var(--muted); padding: 8px 0; border-bottom: 1px dashed var(--line); transition: color .25s; }
.col-more a:hover { color: var(--text); }
.col-empty { color: var(--muted); font-size: .88rem; padding: 16px; border-radius: 14px; border: 1px dashed var(--line-2); margin-bottom: 18px; }
.col .link-arrow { margin-top: auto; font-size: .9rem; color: var(--accent, var(--green)); background: none; border: 0; padding: 0; font: inherit; font-weight: 600; cursor: pointer; text-align: left; }

/* inline subscribe band */
.band { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); position: relative; z-index: 1; }
.band-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding: 26px 32px; border-radius: 20px;
  background: linear-gradient(100deg, rgba(98,230,167,.16), rgba(122,168,255,.12) 60%, rgba(180,140,255,.14)); border: 1px solid var(--line-2); }
.band strong { display: block; font-size: 1.2rem; }
.band span { color: var(--muted); }

/* ---------- topic explorer ---------- */
.explorer { margin-top: 40px; display: grid; grid-template-columns: 300px 1fr; gap: 28px; }
.tab-list { display: flex; flex-direction: column; gap: 6px; }
.tab-list button { display: flex; align-items: center; gap: 12px; text-align: left; padding: 12px 14px; border-radius: 14px; border: 1px solid transparent; background: none; color: var(--muted);
  font: inherit; font-weight: 600; font-size: .95rem; cursor: pointer; transition: background .3s, color .3s, border-color .3s; }
.tab-list button .ico { width: 34px; height: 34px; border-radius: 10px; opacity: .7; transition: opacity .3s; }
.tab-list button .ico svg { width: 17px; height: 17px; }
.tab-list button:hover { color: var(--text); background: rgba(255,255,255,.03); }
.tab-list button[aria-selected="true"] { color: var(--text); background: var(--card); border-color: var(--line); box-shadow: inset 3px 0 0 var(--green); }
.tab-list button[aria-selected="true"] .ico { opacity: 1; }
.panel { background: linear-gradient(160deg, var(--card), var(--bg)); border: 1px solid var(--line); border-radius: 24px; padding: clamp(26px, 4vw, 44px);
  animation: panelIn .6s var(--ease); display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.panel[hidden] { display: none; }
@keyframes panelIn { from { opacity: 0; transform: translateY(16px) scale(.985); filter: blur(6px); } }
.panel h3 { font-size: clamp(1.5rem, 2.4vw, 1.9rem); }
.panel p { color: var(--muted); }
.panel code { display: inline-block; margin: 4px 0 22px; font-family: "JetBrains Mono", monospace; font-size: .84rem; color: var(--blue);
  background: rgba(122,168,255,.08); padding: 8px 14px; border-radius: 10px; border: 1px solid rgba(122,168,255,.2); }
.panel-related h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); font-weight: 700; margin-bottom: 12px; }
.panel-related a { display: block; padding: 14px 16px; border-radius: 14px; background: rgba(255,255,255,.03); border: 1px solid var(--line); text-decoration: none; margin-bottom: 10px;
  transition: border-color .3s, transform .4s var(--ease); }
.panel-related a:hover { border-color: rgba(98,230,167,.35); transform: translateX(4px); }
.panel-related strong { display: block; font-size: .95rem; line-height: 1.35; }
.panel-related small { color: var(--muted); }
.panel .btn-ghost { margin-top: 6px; }

/* ---------- approach (sticky scroll) ---------- */
.approach { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(30px, 6vw, 90px); align-items: start; }
.approach-sticky { position: sticky; top: 120px; }
.approach-meter { margin-top: 30px; height: 4px; border-radius: 4px; background: var(--line); overflow: hidden; max-width: 320px; }
.approach-meter span { display: block; height: 100%; width: 100%; transform-origin: 0 50%; transform: scaleX(0); background: linear-gradient(90deg, var(--green), var(--blue)); transition: transform .2s linear; }
.steps { display: grid; gap: 22px; }
.step { padding: 30px; border-radius: 22px; border: 1px solid var(--line); background: var(--card); opacity: .4; transform: scale(.97); min-height: 44vh;
  display: flex; flex-direction: column; justify-content: center; transition: opacity .6s var(--ease), transform .6s var(--ease), border-color .6s, background .6s; }
.step.is-active { opacity: 1; transform: none; border-color: rgba(98,230,167,.35); background: linear-gradient(160deg, #15221e, var(--card)); }
.step p { color: var(--muted); margin: 0; }
.step-icon { width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; color: var(--green); background: rgba(98,230,167,.1); border: 1px solid rgba(98,230,167,.25); margin-bottom: 20px; }
.step-icon svg { width: 24px; height: 24px; }

/* ---------- feed ---------- */
.feed-controls { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; margin-top: 30px; }
.search { flex: 1 1 280px; display: flex; align-items: center; gap: 10px; padding: 0 16px; border-radius: 14px; border: 1px solid var(--line-2); background: var(--card); transition: border-color .3s; }
.search:focus-within { border-color: var(--green); }
.search svg { color: var(--muted); flex: none; }
.search input { flex: 1; min-width: 0; background: none; border: 0; outline: 0; color: var(--text); font: inherit; padding: 13px 0; }
.search input::placeholder { color: var(--muted); }
.segmented { display: inline-flex; padding: 4px; border-radius: 14px; border: 1px solid var(--line-2); background: var(--card); }
.segmented button { background: none; border: 0; color: var(--muted); font: inherit; font-size: .9rem; font-weight: 600; padding: 9px 16px; border-radius: 10px; cursor: pointer; transition: background .3s, color .3s; }
.segmented button.is-active { background: var(--text); color: var(--bg); }
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 34px; }
.chip { padding: 8px 16px; border-radius: 999px; border: 1px solid var(--line); background: transparent; color: var(--muted); font: inherit; font-size: .88rem; font-weight: 600; cursor: pointer; transition: all .3s var(--ease); }
.chip:hover { color: var(--text); border-color: var(--line-2); }
.chip.is-active { background: rgba(98,230,167,.12); color: var(--green); border-color: rgba(98,230,167,.4); }
.feed { border-top: 1px solid var(--line); }
.f-item { display: grid; grid-template-columns: 150px 1fr auto; gap: 8px 30px; padding: 26px 0; border-bottom: 1px solid var(--line); align-items: start;
  animation: feedIn .5s var(--ease) both; }
@keyframes feedIn { from { opacity: 0; transform: translateY(12px); } }
.f-date { font-family: "JetBrains Mono", monospace; font-size: .82rem; color: var(--muted); padding-top: 4px; }
.f-type { display: inline-block; font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--green); margin-bottom: 6px; }
.f-item.is-update .f-type { color: var(--blue); }
.f-item h3 { font-size: 1.15rem; margin: 0 0 8px; }
.f-item h3 a { text-decoration: none; background: linear-gradient(var(--green), var(--green)) 0 100% / 0 2px no-repeat; transition: background-size .4s var(--ease); }
.f-item h3 a:hover { background-size: 100% 2px; }
.f-item p { color: var(--muted); margin-bottom: 12px; max-width: 720px; }
.f-go { width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line-2); display: grid; place-items: center; text-decoration: none; color: var(--muted); transition: all .35s var(--ease); }
.f-go:hover { color: #04110a; background: var(--green); border-color: var(--green); transform: rotate(-45deg); }
.feed-empty { padding: 40px 0; color: var(--muted); text-align: center; }

/* ---------- author ---------- */
.author { display: grid; grid-template-columns: auto 1fr; gap: clamp(28px, 5vw, 60px); align-items: center; padding: clamp(28px, 5vw, 56px);
  border-radius: 28px; border: 1px solid var(--line); background: linear-gradient(140deg, var(--card), var(--bg-2)); }
.author p { color: var(--muted); max-width: 620px; }
.avatar { width: clamp(110px, 15vw, 160px); aspect-ratio: 1; border-radius: 50%; padding: 4px; position: relative;
  background: conic-gradient(from var(--a, 0deg), var(--green), var(--blue), var(--violet), var(--green)); animation: rotateA 8s linear infinite; }
.avatar span { width: 100%; height: 100%; border-radius: 50%; display: grid; place-items: center; background: var(--card); font-size: clamp(2rem, 3.6vw, 2.8rem); font-weight: 800; }
@property --a { syntax: "<angle>"; inherits: false; initial-value: 0deg; }
@keyframes rotateA { to { --a: 360deg; } }

/* ---------- CTA ---------- */
.cta-wrap { max-width: var(--max); margin: 0 auto clamp(60px, 10vw, 120px); padding: 0 var(--gutter); position: relative; z-index: 1; }
.cta { position: relative; padding: clamp(56px, 9vw, 110px) var(--gutter); text-align: center; border-radius: 32px; overflow: hidden; isolation: isolate;
  background: radial-gradient(120% 140% at 50% 0%, rgba(98,230,167,.22), transparent 55%), var(--bg-2); }
.cta::before { content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px; z-index: -1;
  background: conic-gradient(from var(--a, 0deg), transparent 0 70%, var(--green), var(--blue), transparent);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; animation: rotateA 6s linear infinite; }
.cta p { color: var(--muted); max-width: 520px; margin: 0 auto 32px; }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 56px var(--gutter) 30px; background: var(--bg-2); position: relative; z-index: 1; }
.footer-cols { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 36px; padding-bottom: 40px; border-bottom: 1px solid var(--line); }
.footer-brand p { color: var(--muted); font-size: .92rem; margin-top: 14px; max-width: 300px; }
.footer h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 14px; }
.footer li a, .footer li button { display: inline-block; padding: 5px 0; color: var(--text); text-decoration: none; font: inherit; font-size: .92rem; background: none; border: 0; cursor: pointer; opacity: .85; transition: opacity .25s, color .25s; }
.footer li a:hover, .footer li button:hover { opacity: 1; color: var(--green); }
.footer-bottom { max-width: var(--max); margin: 0 auto; padding-top: 24px; display: flex; flex-wrap: wrap; gap: 8px 28px; justify-content: space-between; align-items: center; color: var(--muted); font-size: .85rem; }
.footer-bottom p { margin: 0; }
.footer-bottom .muted { opacity: .75; max-width: 560px; }
.to-top { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; text-decoration: none; border: 1px solid var(--line-2); transition: transform .3s var(--ease), background .3s; }
.to-top:hover { transform: translateY(-3px); background: var(--card); }

/* ---------- responsive ---------- */
@media (max-width: 1180px) {
  .panel { grid-template-columns: 1fr; }
}
@media (max-width: 1080px) {
  .columns { grid-template-columns: 1fr 1fr; }
  .col:nth-child(2) { border-right: 0; }
  .col:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}
@media (max-width: 960px) {
  .hero-inner, .featured-grid, .explorer, .approach, .panel { grid-template-columns: 1fr; }
  .hero-visual { max-width: 520px; margin: 0 auto; width: 100%; }
  .tab-list { flex-direction: row; overflow-x: auto; scrollbar-width: none; margin-inline: calc(-1 * var(--gutter)); padding-inline: var(--gutter); }
  .tab-list::-webkit-scrollbar { display: none; }
  .tab-list button { white-space: nowrap; flex: none; }
  .tab-list button[aria-selected="true"] { box-shadow: inset 0 -3px 0 var(--green); }
  .approach-sticky { position: static; }
  .step { min-height: 0; opacity: 1; transform: none; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 860px) {
  body { font-size: 16px; }
  .burger { display: block; }
  .nav-links { position: fixed; inset: 0; flex-direction: column; justify-content: center; gap: 10px; background: rgba(11,15,20,.98);
    opacity: 0; visibility: hidden; transition: opacity .4s, visibility .4s; z-index: 1; }
  .nav-links .nav-link { font-size: 1.4rem; color: var(--text); }
  .nav-links .btn { margin: 14px 0 0; }
  .mega, .chev { display: none; }
  .site-header.is-open .nav-links { opacity: 1; visibility: visible; }
}
@media (max-width: 640px) {
  .columns { grid-template-columns: 1fr; }
  .col { border-right: 0; border-bottom: 1px solid var(--line); }
  .col:last-child { border-bottom: 0; }
  .f-item { grid-template-columns: 1fr; gap: 4px; }
  .f-go { display: none; }
  .author { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .band-inner { padding: 22px; }
  .announce a { font-size: .8rem; }
  .announce-inner { justify-content: flex-start; padding-right: 56px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .reveal, .hero-copy > *, .hero-visual { opacity: 1; transform: none; }
  .art-lines path { stroke-dashoffset: 0; }
  .art-dots circle { opacity: .9; }
}