/* CS 1.6 Kyntra: Valve TrackerScheme palette (olive, gold, bevels) with a modern layout. */
:root {
  color-scheme: dark;
  --bg: #1c2018;
  --bg-2: #22271d;
  --panel: #3e4637;
  --panel-2: #4c5844;
  --light: #889180;
  --dark: #282e22;
  --inset: #2f3529;
  --gold: #e8d583;
  --gold-2: #c4b45a;
  --text: #f1f0e7;
  --muted: #b9bdaf;
  --line: rgba(136, 145, 128, .28);
  --radius: 4px;
  --bevel: var(--light) var(--dark) var(--dark) var(--light);
  --shadow: 0 18px 50px rgba(0, 0, 0, .45);
  font: 16px/1.6 Tahoma, Verdana, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; }
img { display: block; max-width: 100%; height: auto; }
a { color: var(--gold); text-underline-offset: .2em; }
a:hover { color: #fff3bd; }
:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
h1, h2, h3 { line-height: 1.15; margin: 0; letter-spacing: -.01em; }
p, ul, ol, dl { margin: 0; }
code { font-family: Consolas, "Courier New", monospace; font-size: .92em; color: var(--gold); background: rgba(0,0,0,.25); padding: .05em .35em; border-radius: 3px; overflow-wrap: anywhere; }
b { color: #fff; }
.gold { color: var(--gold); }
.muted { color: var(--muted); }
.small { font-size: .82rem; }
.shell { width: min(1160px, calc(100% - 32px)); margin-inline: auto; }
.narrow { width: min(860px, calc(100% - 32px)); }
[id] { scroll-margin-top: 80px; }

.skip { position: absolute; left: 8px; top: 8px; z-index: 50; padding: .5rem .8rem; background: var(--gold); color: #1c2018; }
.skip:not(:focus) { clip-path: inset(100%); }

/* Navigation */
.nav { position: sticky; top: 0; z-index: 20; background: rgba(28, 32, 24, .82); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav-row { display: flex; align-items: center; gap: 1.5rem; min-height: 62px; }
.brand { display: inline-flex; align-items: center; gap: .6rem; color: var(--text); text-decoration: none; font-size: 1.02rem; }
.brand b { color: var(--gold); }
.nav nav { display: flex; gap: .2rem; margin-left: auto; }
.nav nav a { color: var(--muted); text-decoration: none; padding: .45rem .7rem; font-size: .9rem; border-radius: var(--radius); }
.nav nav a:hover { color: var(--text); background: rgba(255,255,255,.05); }

/* Buttons */
.btn { display: inline-flex; flex-direction: column; justify-content: center; gap: .1rem; padding: .7rem 1.2rem; color: var(--text); text-decoration: none; background: var(--panel-2); border: 1px solid; border-color: var(--bevel); border-radius: 2px; transition: transform .15s ease, filter .15s ease, box-shadow .15s ease; }
.btn:hover { color: #fff; filter: brightness(1.12); transform: translateY(-1px); }
.btn:active { transform: translateY(0); border-color: var(--dark) var(--light) var(--light) var(--dark); }
.btn-gold { background: linear-gradient(180deg, #f0de8d, #c9b65b); color: #1c2018; border-color: #fff4c2 #8a7b31 #8a7b31 #fff4c2; box-shadow: 0 8px 30px rgba(232, 213, 131, .18); }
.btn-gold:hover { color: #1c2018; }
.btn-small { padding: .45rem .9rem; font-size: .88rem; }
.btn-big { min-width: 220px; padding: .9rem 1.4rem; }
.btn-label { font-weight: bold; font-size: 1.02rem; }
.btn-sub { font-size: .78rem; opacity: .75; }

/* Hero */
.hero { position: relative; isolation: isolate; padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(3rem, 7vw, 5.5rem); overflow: hidden; }
.hero-art { position: absolute; inset: 0; z-index: -1; background: url("media/classic-menu.webp") center 30% / cover no-repeat; opacity: .55; transform: scale(1.04); animation: drift 26s ease-in-out infinite alternate; }
.hero-art::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, var(--bg) 8%, rgba(28,32,24,.88) 42%, rgba(28,32,24,.35) 100%), linear-gradient(0deg, var(--bg) 0%, transparent 35%); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.kicker { display: inline-flex; align-items: center; gap: .5rem; color: var(--gold); text-transform: uppercase; letter-spacing: .14em; font-size: .75rem; font-weight: bold; }
.kicker .dot { width: 8px; height: 8px; border-radius: 50%; background: #9fd36b; box-shadow: 0 0 0 4px rgba(159, 211, 107, .18); animation: pulse 2.4s ease-in-out infinite; }
.hero h1 { margin: 1rem 0 1.2rem; font-size: clamp(2.3rem, 5.4vw, 4rem); font-weight: bold; }
.lead { max-width: 36rem; color: #dcdccf; font-size: clamp(1rem, 1.6vw, 1.12rem); }
.cta { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2rem; }
.meta { display: flex; flex-wrap: wrap; gap: .4rem 1.4rem; list-style: none; padding: 0; margin-top: 1.4rem; color: var(--muted); font-size: .86rem; }
.meta li + li::before { content: "·"; margin-right: 1.4rem; color: var(--light); }

/* VGUI window */
.vwin, .vdialog { background: var(--panel); border: 1px solid; border-color: var(--bevel); box-shadow: var(--shadow), 2px 2px 0 #12150f; }
.vwin-title { display: flex; justify-content: space-between; align-items: center; margin: 2px; padding: .35rem .7rem; background: var(--panel-2); border: 1px solid; border-color: var(--bevel); font-size: .84rem; font-weight: bold; }
.vwin-x { color: var(--muted); font-size: .75rem; }
.vwin-tabs { display: flex; gap: 2px; padding: .7rem .7rem 0; font-size: .78rem; }
.vwin-tabs span { padding: .3rem .65rem; background: var(--inset); border: 1px solid; border-color: var(--bevel); border-bottom: 0; color: var(--muted); }
.vwin-tabs .on { background: var(--panel-2); color: var(--text); }
.checks { list-style: none; margin: 0 .7rem; padding: 1rem; background: var(--inset); border: 1px solid; border-color: var(--dark) var(--light) var(--light) var(--dark); }
.checks li { display: flex; align-items: center; gap: .7rem; padding: .38rem 0; font-size: .9rem; color: var(--muted); transition: color .3s; }
.checks li::before { content: ""; flex: none; width: 15px; height: 15px; background: var(--dark); border: 1px solid; border-color: var(--dark) var(--light) var(--light) var(--dark); }
.checks li.on { color: var(--text); }
.checks li.on::before { background: var(--dark) center / 11px no-repeat url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M1.5 6.5l3 3 6-7' fill='none' stroke='%23e8d583' stroke-width='2'/%3E%3C/svg%3E"); animation: tick .25s ease-out; }
.vwin-foot { display: flex; justify-content: flex-end; gap: .4rem; padding: .8rem .7rem; }
.vbtn { padding: .25rem .9rem; font-size: .78rem; background: var(--panel-2); border: 1px solid; border-color: var(--bevel); }
.hero-window { transform: perspective(1200px) rotateY(-8deg) rotateX(3deg); }

/* Highlights strip */
.strip { border-block: 1px solid var(--line); background: var(--bg-2); }
.strip-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.strip-grid > div { display: flex; flex-direction: column; gap: .3rem; padding: 1.6rem 1.4rem; }
.strip-grid > div + div { border-left: 1px solid var(--line); }
.strip-grid b { color: var(--gold); }
.strip-grid span { color: var(--muted); font-size: .88rem; }

/* Sections */
.section { padding: clamp(4rem, 8vw, 6.5rem) 0; }
.section-alt { background: var(--bg-2); border-block: 1px solid var(--line); }
.section-head { margin-bottom: 2.4rem; }
.section-head h2 { margin-top: .5rem; font-size: clamp(1.8rem, 3.6vw, 2.6rem); }
.section-lead { margin-top: .8rem; max-width: 40rem; color: var(--muted); }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.card { position: relative; padding: 1.5rem; background: linear-gradient(180deg, rgba(76, 88, 68, .55), rgba(62, 70, 55, .35)); border: 1px solid var(--line); border-radius: var(--radius); transition: border-color .2s, transform .2s, background .2s; }
.card:hover { border-color: rgba(232, 213, 131, .45); transform: translateY(-3px); }
.card .ico { display: inline-grid; place-items: center; width: 38px; height: 38px; margin-bottom: 1rem; font-size: .8rem; font-weight: bold; color: var(--gold); background: var(--inset); border: 1px solid; border-color: var(--dark) var(--light) var(--light) var(--dark); }
.card h3 { font-size: 1.1rem; margin-bottom: .45rem; }
.card p { color: var(--muted); font-size: .92rem; }

.gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.shot { position: relative; padding: 0; overflow: hidden; cursor: zoom-in; background: #000; border: 1px solid var(--line); border-radius: var(--radius); }
.shot img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform .5s ease, opacity .3s; opacity: .92; }
.shot:hover img { transform: scale(1.04); opacity: 1; }
.shot span { position: absolute; left: 0; bottom: 0; padding: .6rem 1rem; font: bold .9rem Tahoma, Verdana, sans-serif; color: var(--text); background: linear-gradient(0deg, rgba(0,0,0,.75), transparent); width: 100%; text-align: left; }
.lightbox { max-width: min(1280px, 94vw); padding: 0; background: #000; border: 1px solid var(--light); color: var(--text); }
.lightbox::backdrop { background: rgba(0, 0, 0, .82); }
.lightbox p { padding: .6rem 1rem; color: var(--muted); font-size: .9rem; }
.lightbox-close { position: absolute; right: .5rem; top: .5rem; width: 34px; height: 34px; color: var(--text); background: var(--panel-2); border: 1px solid; border-color: var(--bevel); cursor: pointer; }

.steps { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.steps li { display: flex; gap: 1rem; padding: 1.4rem; background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); }
.steps .num { flex: none; display: grid; place-items: center; width: 34px; height: 34px; color: #1c2018; background: var(--gold); font-weight: bold; }
.steps h3 { font-size: 1.02rem; margin-bottom: .35rem; }
.steps p { color: var(--muted); font-size: .92rem; }
.note { margin-top: 1.2rem; padding: 1.1rem 1.3rem; border-left: 3px solid var(--gold); background: rgba(232, 213, 131, .07); }
.note p { margin-top: .3rem; color: var(--muted); font-size: .92rem; }

.release { background: var(--panel); border: 1px solid; border-color: var(--bevel); }
.release summary, .faq summary { cursor: pointer; list-style: none; }
.release summary::-webkit-details-marker, .faq summary::-webkit-details-marker { display: none; }
.release summary { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: .8rem 1rem; background: var(--panel-2); border-bottom: 1px solid var(--dark); }
.release time { color: var(--muted); font-size: .85rem; }
.tag { margin-left: .4rem; padding: .1rem .5rem; font-size: .72rem; color: #1c2018; background: #9fd36b; border-radius: 2px; vertical-align: middle; }
.release-body { padding: 1.1rem 1.3rem 1.3rem; }
.release-body ul { margin-top: .6rem; padding-left: 1.2rem; color: var(--muted); }
.release-body li + li { margin-top: .3rem; }
.checksums { margin-top: 1.5rem; padding: 1.2rem 1.3rem; background: var(--inset); border: 1px solid var(--line); }
.checksums h3 { font-size: .95rem; margin-bottom: .7rem; }
.checksums dl > div { margin-bottom: .6rem; }
.checksums dt { font-size: .85rem; }
.checksums dd { margin: .2rem 0 0; font-size: .8rem; }
.checksums p { margin-top: .4rem; font-size: .85rem; }

.faq { display: grid; gap: .6rem; }
.faq details { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); }
.faq summary { position: relative; padding: 1rem 3rem 1rem 1.2rem; font-weight: bold; }
.faq summary::after { content: "+"; position: absolute; right: 1.2rem; top: .85rem; color: var(--gold); font-size: 1.2rem; transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 1.2rem 1.1rem; color: var(--muted); }

/* "Kyntra isn't for you?" dialog */
.alt-clients { background: radial-gradient(60% 80% at 50% 0%, rgba(232, 213, 131, .08), transparent 70%); }
.vdialog { max-width: 760px; margin-inline: auto; opacity: 0; transform: translateY(30px) scale(.94); transition: opacity .5s ease, transform .6s cubic-bezier(.2, .9, .3, 1.2); }
.vdialog.in { opacity: 1; transform: none; }
.vdialog.in .vwin-title { animation: blink .5s steps(2) 2; }
.vdialog-body { padding: clamp(1.4rem, 4vw, 2.2rem); }
.vdialog h2 { font-size: clamp(1.6rem, 3.4vw, 2.2rem); }
.typed { margin-top: .9rem; color: var(--muted); min-height: 3.2em; }
.typed.typing::after { content: "▌"; color: var(--gold); animation: caret .8s steps(1) infinite; }
.vprogress { margin-top: 1.2rem; height: 16px; padding: 2px; background: var(--inset); border: 1px solid; border-color: var(--dark) var(--light) var(--light) var(--dark); }
.vprogress span { display: block; height: 100%; width: 0; background: repeating-linear-gradient(90deg, var(--gold-2) 0 10px, transparent 10px 12px); transition: width 1.4s steps(18); }
.vdialog.searching .vprogress span, .vdialog.done .vprogress span { width: 100%; }
.vprogress-label { margin-top: .4rem; color: var(--muted); font-size: .8rem; }
.vdialog.done .vprogress-label { color: #9fd36b; }
.alts { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 1.4rem 0 1rem; }
.alt { position: relative; display: flex; flex-direction: column; gap: .4rem; padding: 1.2rem 1.3rem; overflow: hidden; text-decoration: none; color: var(--text); background: var(--panel-2); border: 1px solid; border-color: var(--bevel); opacity: 0; transform: translateY(18px); transition: opacity .45s ease, transform .45s ease, filter .2s; }
.alt::after { content: ""; position: absolute; inset: 0; background: linear-gradient(110deg, transparent 35%, rgba(255, 245, 200, .18) 50%, transparent 65%); transform: translateX(-120%); }
.vdialog.done .alt { opacity: 1; transform: none; }
.vdialog.done .alt:nth-child(2) { transition-delay: .18s; }
.vdialog.done .alt::after { animation: shine 1.4s ease .5s 1; }
.alt:hover { filter: brightness(1.12); color: var(--text); }
.alt-name { font-size: 1.25rem; font-weight: bold; color: var(--gold); }
.alt-desc { color: var(--muted); font-size: .9rem; }
.alt-go { margin-top: .4rem; font-size: .85rem; color: var(--text); }

.credits > div { display: grid; grid-template-columns: 200px 1fr; gap: 1rem; padding: .9rem 0; border-bottom: 1px solid var(--line); }
.credits dt { color: var(--gold); font-weight: bold; }
.credits dd { margin: 0; color: var(--muted); }

.footer { padding: 2rem 0; border-top: 1px solid var(--line); color: var(--muted); font-size: .88rem; }
.footer-row { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.footer-row span { display: inline-flex; align-items: center; gap: .5rem; }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
.no-js .reveal, .no-js .vdialog, .no-js .alt { opacity: 1; transform: none; }

@keyframes drift { to { transform: scale(1.1) translateX(-1.5%); } }
@keyframes pulse { 50% { box-shadow: 0 0 0 7px rgba(159, 211, 107, 0); } }
@keyframes tick { from { transform: scale(.6); } }
@keyframes caret { 50% { opacity: 0; } }
@keyframes blink { 50% { background: var(--gold-2); color: #1c2018; } }
@keyframes shine { to { transform: translateX(120%); } }

@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-window { transform: none; max-width: 520px; }
  .features { grid-template-columns: repeat(2, 1fr); }
  .strip-grid { grid-template-columns: repeat(2, 1fr); }
  .strip-grid > div:nth-child(3) { border-left: 0; }
  .steps { grid-template-columns: 1fr; }
  .nav nav { display: none; }
  .nav .btn-small { margin-left: auto; }
}
@media (max-width: 620px) {
  .features, .gallery, .alts, .strip-grid { grid-template-columns: 1fr; }
  .strip-grid > div + div { border-left: 0; border-top: 1px solid var(--line); }
  .btn-big { width: 100%; }
  .credits > div { grid-template-columns: 1fr; gap: .2rem; }
  .hero-window { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal, .vdialog, .alt { opacity: 1; transform: none; }
  .vprogress span { width: 100%; }
}

/* Collapsible SHA-256 under Install */
details.checksums summary { cursor: pointer; font-weight: bold; font-size: .9rem; list-style: none; }
details.checksums summary::-webkit-details-marker { display: none; }
details.checksums summary::before { content: "▸ "; color: var(--gold); }
details.checksums[open] summary::before { content: "▾ "; }
details.checksums dl { margin-top: .8rem; }

/* Animated credits: Valve first, letter by letter, then the roll */
.credits-section { overflow: hidden; }
.credit-valve { position: relative; text-align: center; padding: 2.4rem 1rem 2rem; margin-bottom: 1.6rem; }
.credit-valve::before { content: ""; position: absolute; left: 50%; top: 50%; width: 520px; height: 520px; max-width: 100%; transform: translate(-50%, -50%) scale(.6); background: radial-gradient(circle, rgba(232, 213, 131, .16), transparent 62%); opacity: 0; transition: opacity 1.2s ease, transform 1.6s ease; pointer-events: none; }
.credit-valve.in::before { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.credit-pre, .credit-post { color: var(--muted); opacity: 0; transform: translateY(10px); transition: opacity .7s ease, transform .7s ease; }
.credit-pre { text-transform: uppercase; letter-spacing: .25em; font-size: .78rem; }
.credit-post { margin-top: 1rem; font-size: .9rem; transition-delay: 1.5s; }
.credit-valve.in .credit-pre, .credit-valve.in .credit-post { opacity: 1; transform: none; }
.credit-big { display: flex; justify-content: center; gap: .08em; margin: .6rem 0 0; font: bold clamp(3rem, 11vw, 6.5rem)/1 "Arial Black", Tahoma, sans-serif; letter-spacing: .12em; }
.credit-big span { display: inline-block; color: transparent; background: linear-gradient(180deg, #fff6cf 0%, var(--gold) 45%, #9c8a3a 100%); -webkit-background-clip: text; background-clip: text; opacity: 0; transform: translateY(40px) scale(.7); filter: blur(8px); transition: opacity .6s ease, transform .8s cubic-bezier(.2, .9, .3, 1.3), filter .6s ease; }
.credit-valve.in .credit-big span { opacity: 1; transform: none; filter: drop-shadow(0 0 18px rgba(232, 213, 131, .35)); }
.credit-valve.in .credit-big span:nth-child(1) { transition-delay: .2s; }
.credit-valve.in .credit-big span:nth-child(2) { transition-delay: .35s; }
.credit-valve.in .credit-big span:nth-child(3) { transition-delay: .5s; }
.credit-valve.in .credit-big span:nth-child(4) { transition-delay: .65s; }
.credit-valve.in .credit-big span:nth-child(5) { transition-delay: .8s; }
.credit-valve.glow .credit-big span { animation: glow 4s ease-in-out infinite; }
.credit-valve.glow .credit-big span:nth-child(2) { animation-delay: .15s; }
.credit-valve.glow .credit-big span:nth-child(3) { animation-delay: .3s; }
.credit-valve.glow .credit-big span:nth-child(4) { animation-delay: .45s; }
.credit-valve.glow .credit-big span:nth-child(5) { animation-delay: .6s; }
.credit-roll { list-style: none; padding: 0; display: grid; gap: .7rem; }
.credit { position: relative; display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap; padding: 1rem 1.2rem; overflow: hidden; background: var(--bg); border: 1px solid var(--line); border-left: 3px solid var(--gold); opacity: 0; transform: translateX(-24px); transition: opacity .5s ease, transform .5s ease; }
.credit::after { content: ""; position: absolute; inset: 0; background: linear-gradient(110deg, transparent 35%, rgba(255, 245, 200, .12) 50%, transparent 65%); transform: translateX(-120%); }
.credit-roll.in .credit { opacity: 1; transform: none; }
.credit-roll.in .credit::after { animation: shine 1.2s ease 1; }
.credit-roll.in .credit:nth-child(2), .credit-roll.in .credit:nth-child(2)::after { transition-delay: .15s; animation-delay: .15s; }
.credit-roll.in .credit:nth-child(3), .credit-roll.in .credit:nth-child(3)::after { transition-delay: .3s; animation-delay: .3s; }
.credit-roll.in .credit:nth-child(4), .credit-roll.in .credit:nth-child(4)::after { transition-delay: .45s; animation-delay: .45s; }
.credit b a { color: var(--text); }
.credit b a:hover { color: var(--gold); }
.credit span { color: var(--muted); font-size: .88rem; }
.no-js .credit, .no-js .credit-pre, .no-js .credit-post, .no-js .credit-big span { opacity: 1; transform: none; filter: none; }
@keyframes glow { 50% { filter: drop-shadow(0 0 26px rgba(232, 213, 131, .6)) brightness(1.15); } }
@media (prefers-reduced-motion: reduce) {
  .credit, .credit-pre, .credit-post, .credit-big span { opacity: 1 !important; transform: none !important; filter: none !important; }
}