/* CS2 Skin Guide — single dark look (deliberate), cool slate + ice blue.
   Layout: wide hero split (thesis left, trade-window illustration right), fact tiles, reading column + sticky TOC. */

/* ---------- Fonts (self-hosted, no third-party requests) ---------- */
@font-face{font-family:"Display";font-style:normal;font-weight:800;font-display:swap;src:url(../fonts/fsec-800-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Display";font-style:normal;font-weight:800;font-display:swap;src:url(../fonts/fsec-800-latin-ext.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Display";font-style:normal;font-weight:800;font-display:swap;src:url(../fonts/fsec-800-cyrillic.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Display";font-style:normal;font-weight:800;font-display:swap;src:url(../fonts/fsec-800-cyrillic-ext.woff2) format("woff2");unicode-range:U+0460-052F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}
@font-face{font-family:"Display";font-style:normal;font-weight:800;font-display:swap;src:url(../fonts/fsec-800-greek.woff2) format("woff2");unicode-range:U+0370-0377,U+037A-037F,U+0384-038A,U+038C,U+038E-03A1,U+03A3-03FF}
@font-face{font-family:"Body";font-style:normal;font-weight:200 800;font-display:swap;src:url(../fonts/manrope-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Body";font-style:normal;font-weight:200 800;font-display:swap;src:url(../fonts/manrope-latin-ext.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Body";font-style:normal;font-weight:200 800;font-display:swap;src:url(../fonts/manrope-cyrillic.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Body";font-style:normal;font-weight:200 800;font-display:swap;src:url(../fonts/manrope-cyrillic-ext.woff2) format("woff2");unicode-range:U+0460-052F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}
@font-face{font-family:"Body";font-style:normal;font-weight:200 800;font-display:swap;src:url(../fonts/manrope-greek.woff2) format("woff2");unicode-range:U+0370-0377,U+037A-037F,U+0384-038A,U+038C,U+038E-03A1,U+03A3-03FF}

:root{
  --bg:#13161a;          /* cool slate */
  --surface:#1b1f25;     /* panels */
  --surface-2:#232832;   /* raised */
  --line:#2e3540;
  --fg:#e6ebf1;          /* cool white */
  --muted:#97a2b0;
  --faint:#667180;
  --accent:#7cc4ff;      /* ice blue */
  --accent-ink:#0b1a27;
  --alert:#f0a35e;
  --ok:#7fd1b0;
  --f-display:"Display","Fira Sans Extra Condensed","Arial Narrow",Impact,sans-serif;
  --f-body:"Body",Manrope,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --wrap:1180px;
  --gutter:clamp(16px,4vw,32px);
  --r:6px;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:400 1rem/1.65 var(--f-body);font-feature-settings:"ss01"}
img,svg{max-width:100%}
a{color:var(--fg);text-decoration-color:color-mix(in srgb,var(--accent) 70%,transparent);text-underline-offset:3px}
a:hover{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}
h1,h2,h3{font-family:var(--f-display);font-weight:800;letter-spacing:.003em;line-height:1;text-wrap:balance;margin:0}
h2{font-size:clamp(1.9rem,3.6vw,2.7rem)}
h3{font-size:1.35rem;letter-spacing:.02em}
p{margin:0}
.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:var(--accent-ink);padding:8px 12px;z-index:10}
.skip:focus{left:8px}
.eyebrow{font-size:.75rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.tnum{font-variant-numeric:tabular-nums}

/* ---------- Header ---------- */
.site-header{border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg) 92%,transparent);position:sticky;top:env(safe-area-inset-top,0px);z-index:15;backdrop-filter:blur(8px)}
.head-row{display:flex;align-items:center;gap:24px;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--fg);flex:none}
.brand:hover{color:var(--fg)}
.brand-mark{width:34px;height:34px;flex:none}
.brand-name{font-family:var(--f-display);font-weight:800;font-size:1.35rem;letter-spacing:.01em;line-height:1}
.brand-name small{display:block;font-family:var(--f-body);font-weight:600;font-size:.7rem;letter-spacing:.02em;color:var(--muted);margin-top:3px}
.main-nav{display:flex;gap:4px;margin-left:auto;overflow-x:auto;scrollbar-width:none;min-width:0}
.main-nav::-webkit-scrollbar{display:none}
.main-nav a{white-space:nowrap;text-decoration:none;font-weight:600;font-size:.88rem;color:var(--muted);padding:8px 10px;border-radius:var(--r)}
.main-nav a:hover{color:var(--fg);background:var(--surface)}
.main-nav a[aria-current="page"]{color:var(--fg);box-shadow:inset 0 -2px 0 var(--accent);border-radius:0}
.lang{flex:none;position:relative;font-size:.82rem;font-weight:700}
.lang summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:6px;color:var(--fg);border:1px solid var(--line);border-radius:999px;padding:6px 12px}
.lang summary::-webkit-details-marker{display:none}
.lang summary::after{content:"";width:6px;height:6px;border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);transform:rotate(45deg) translateY(-2px)}
.lang[open] summary{border-color:var(--accent)}
.lang-list{position:absolute;right:0;top:calc(100% + 8px);z-index:20;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:6px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:2px;width:300px;max-width:calc(100vw - 32px);box-shadow:0 20px 40px -20px #000}
.lang-list a{text-decoration:none;color:var(--muted);padding:7px 10px;border-radius:6px;font-weight:600;display:flex;gap:8px}
.lang-list a span{color:var(--faint);font-size:.72rem;width:2.2em;text-transform:uppercase}
.lang-list a:hover{background:var(--surface-2);color:var(--fg)}
.lang-list a[aria-current="true"]{color:var(--accent)}
@media (max-width:820px){
  .head-row{flex-wrap:wrap;gap:8px 16px;padding-block:10px}
  .main-nav{order:3;width:100%;margin-left:-10px}
  .lang{margin-left:auto}
}

/* ---------- Hero ---------- */
.hero{position:relative;padding-block:clamp(40px,7vw,88px) clamp(32px,5vw,56px);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:clamp(24px,5vw,64px);align-items:center}
.hero-copy{position:relative;min-width:0}
.hero h1{font-size:clamp(2.8rem,6.6vw,5.2rem);line-height:.95;margin-top:14px;max-width:11ch}
.not-official{display:inline-flex;align-items:center;gap:8px;margin-top:18px;font-size:.88rem;font-weight:700;color:var(--fg);background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:7px 12px}
.not-official svg{color:var(--alert);flex:none}
.lead{margin-top:18px;max-width:34rem;font-size:1.08rem;color:var(--muted)}
.lead strong{color:var(--fg);font-weight:700}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px 28px;margin-top:30px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;background:var(--accent);color:var(--accent-ink);text-decoration:none;font-weight:800;font-size:1rem;letter-spacing:.01em;padding:14px 26px 14px 28px;border-radius:999px;transition:transform .15s ease,box-shadow .15s ease}
.btn:hover{color:var(--accent-ink);transform:translateY(-1px);box-shadow:0 8px 24px -10px var(--accent)}
.btn svg{transition:transform .15s ease}
.btn:hover svg{transform:translateX(3px)}
.checked{display:grid;gap:2px;font-size:.85rem;color:var(--muted)}
.checked b{color:var(--fg)}
.checked .ticks{display:flex;gap:4px;color:var(--accent)}
.hero-trust{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:26px;font-size:.85rem;color:var(--muted)}
.hero-trust span{display:inline-flex;align-items:center;gap:7px}
.hero-trust svg{color:var(--ok)}

/* Trade window illustration */
.art{position:relative;min-width:0;max-width:100%;padding:12% 2% 14% 6%}
.art::before{content:"";position:absolute;inset:4% 0 0 8%;background-image:radial-gradient(color-mix(in srgb,var(--fg) 22%,transparent) 1.2px,transparent 1.4px);background-size:14px 14px;-webkit-mask-image:radial-gradient(closest-side,#000 40%,transparent);mask-image:radial-gradient(closest-side,#000 40%,transparent)}
.glow{position:absolute;border-radius:50%;filter:blur(48px);opacity:.55}
.glow.g1{width:46%;height:46%;left:16%;top:12%;background:#2a64c9}
.glow.g2{width:42%;height:42%;right:4%;bottom:10%;background:#159a8c}
.glow.g3{width:30%;height:30%;right:14%;top:6%;background:#6d5bd0;opacity:.35}
.window{position:relative;z-index:1;background:color-mix(in srgb,var(--surface) 88%,transparent);border:1px solid var(--line);border-radius:10px;box-shadow:0 30px 60px -30px #000;display:grid;grid-template-rows:auto 1fr auto;overflow:hidden;transform:rotate(-2deg)}
.win-bar{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;border-bottom:1px solid var(--line);font-size:.7rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.win-bar i{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--line);margin-right:5px}
.win-cols{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:12px;padding:18px 14px 22px}
.col{display:grid;gap:8px;align-content:start;min-width:0}
.col-h{font-size:.66rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.swap{align-self:center;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--accent);color:var(--accent-ink)}
.item{display:grid;grid-template-columns:44px minmax(0,1fr);gap:9px;align-items:center;background:var(--surface-2);border:1px solid var(--line);border-radius:6px;padding:7px}
.swatch{height:30px;border-radius:4px;position:relative;overflow:hidden}
.swatch::after{content:"";position:absolute;inset:0;background:linear-gradient(115deg,transparent 40%,rgba(255,255,255,.35) 50%,transparent 60%)}
.sw1{background:linear-gradient(135deg,#f0b648,#c4492f 55%,#5c2a7a)}
.sw2{background:linear-gradient(135deg,#86d0f0,#3a6fb8 50%,#1d2b4a)}
.sw3{background:linear-gradient(135deg,#d5d0c4,#8b857a 50%,#3b3833)}
.sw4{background:linear-gradient(135deg,#f4d36b,#b68a1f 55%,#3c2a10)}
.item-t{min-width:0;font-size:.72rem;line-height:1.3}
.item-t b{display:block;font-size:.78rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.item-t span{color:var(--muted);font-variant-numeric:tabular-nums}
.win-foot{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 14px;border-top:1px solid var(--line);font-size:.75rem;color:var(--muted);font-variant-numeric:tabular-nums}
.win-foot b{color:var(--accent)}
.art-note{position:absolute;right:2%;bottom:0;font-size:.7rem;color:var(--faint)}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr}.art{max-width:560px}}
@media (max-width:440px){.win-cols{grid-template-columns:1fr;}.swap{justify-self:center;transform:rotate(90deg)}}

/* ---------- Fact strip ---------- */
.facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin-top:clamp(28px,5vw,48px);border-block:1px solid var(--line)}
.fact{display:grid;gap:6px;align-content:start;padding:22px 24px;border-left:1px solid var(--line)}
.fact:first-child{border-left:0;padding-left:0}
.fact .v{font-family:var(--f-display);font-weight:800;font-size:2.3rem;line-height:1;color:var(--accent);font-variant-numeric:tabular-nums}
.fact .l{font-size:.88rem;font-weight:600;color:var(--muted);line-height:1.4;max-width:16rem}
.facts-note{margin-top:10px;font-size:.78rem;color:var(--faint)}
@media (max-width:980px){.facts{grid-template-columns:repeat(2,minmax(0,1fr))}.fact:nth-child(3){border-left:0;padding-left:0}.fact:nth-child(n+3){border-top:1px solid var(--line)}}
@media (max-width:480px){.facts{grid-template-columns:1fr}.fact{border-left:0;padding-left:0}.fact+.fact{border-top:1px solid var(--line)}}

/* ---------- Disclosure ---------- */
.disclosure{border:1px solid var(--line);border-left:3px solid var(--alert);border-radius:var(--r);padding:16px 20px;font-size:.92rem;color:var(--muted);margin-block:clamp(28px,5vw,48px)}
.disclosure strong{color:var(--fg)}

/* ---------- Sections ---------- */
.section{padding-block:clamp(40px,6vw,72px)}
.section-head{display:grid;gap:12px;max-width:44rem;margin-bottom:28px}
.section-head p{color:var(--muted)}
.band{background:var(--surface);border-block:1px solid var(--line)}

.chapters{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.chapter{display:grid;grid-template-rows:auto auto 1fr auto;gap:10px;text-decoration:none;color:var(--fg);background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:22px;transition:border-color .15s ease,transform .15s ease}
.chapter:hover{border-color:var(--accent);color:var(--fg);transform:translateY(-2px)}
.chapter .n{font-family:var(--f-display);font-weight:800;font-size:1rem;color:var(--accent)}
.chapter p{color:var(--muted);font-size:.92rem}
.chapter .go{font-size:.85rem;font-weight:800;color:var(--accent)}
@media (max-width:980px){.chapters{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:540px){.chapters{grid-template-columns:1fr}}

.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:clamp(24px,5vw,64px);align-items:start}
@media (max-width:860px){.split{grid-template-columns:1fr}}

.checklist{list-style:none;margin:0;padding:0;display:grid;gap:10px;counter-reset:c}
.checklist li{display:grid;grid-template-columns:28px minmax(0,1fr);gap:14px;align-items:start;padding:14px 16px;background:var(--bg);border:1px solid var(--line);border-radius:var(--r)}
.checklist li::before{counter-increment:c;content:counter(c);display:grid;place-items:center;width:28px;height:28px;border-radius:50%;border:1.5px solid var(--accent);color:var(--accent);font-weight:800;font-size:.85rem}
.checklist b{display:block}
.checklist span{color:var(--muted);font-size:.92rem}

/* Tables */
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r)}
table{border-collapse:collapse;width:100%;min-width:480px;font-size:.93rem}
th,td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
thead th{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);background:var(--surface-2)}
tbody tr:last-child>*{border-bottom:0}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
tr.total td,tr.total th{font-weight:800;color:var(--fg)}
.cap{margin-top:12px;font-size:.85rem;color:var(--faint)}

/* FAQ */
.faq{display:grid;gap:10px}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--r)}
.faq summary{cursor:pointer;list-style:none;padding:16px 48px 16px 20px;font-weight:700;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:1.4rem;color:var(--accent);font-weight:400}
.faq details[open] summary::after{content:"−"}
.faq details p{padding:0 20px 18px;color:var(--muted)}

/* Sources */
.sources{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.sources li{padding:14px 16px;border:1px solid var(--line);border-radius:var(--r);min-width:0}
.sources a{font-weight:700}
.sources span{display:block;font-size:.8rem;color:var(--faint);overflow-wrap:anywhere}
@media (max-width:700px){.sources{grid-template-columns:1fr}}

.cta{text-align:left;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:center}
.cta p{color:var(--muted);margin-top:10px;max-width:38rem}
.cta .links{display:grid;gap:12px;justify-items:start}
.textlink{font-weight:700;font-size:.92rem}
.small{font-size:.8rem;color:var(--faint)}
@media (max-width:760px){.cta{grid-template-columns:1fr}}

/* ---------- Article pages ---------- */
.page-head{padding-block:clamp(32px,6vw,64px) 24px;border-bottom:1px solid var(--line)}
.crumbs{font-size:.82rem;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px}
.crumbs a{color:var(--muted)}
.page-head h1{font-size:clamp(2.4rem,5.6vw,4.2rem);margin-top:14px;max-width:18ch}
.page-head .lead{max-width:42rem}
.meta{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:18px;font-size:.82rem;color:var(--faint)}
.reading{display:grid;grid-template-columns:240px minmax(0,1fr);gap:clamp(24px,5vw,64px);padding-block:40px 72px}
.toc{position:sticky;top:calc(env(safe-area-inset-top,0px) + 88px);align-self:start;display:grid;gap:2px;font-size:.88rem}
.toc .eyebrow{margin-bottom:8px}
.toc a{text-decoration:none;color:var(--muted);padding:6px 0 6px 12px;border-left:2px solid var(--line)}
.toc a:hover{color:var(--fg);border-left-color:var(--accent)}
@media (max-width:900px){.reading{grid-template-columns:1fr}.toc{position:static;border:1px solid var(--line);border-radius:var(--r);padding:16px}}
.prose{max-width:44rem;min-width:0}
.prose>*+*{margin-top:1.1em}
.prose h2{font-size:clamp(1.7rem,3vw,2.2rem);margin-top:2.2em;scroll-margin-top:96px}
.prose h3{margin-top:1.8em}
.prose ul,.prose ol{padding-left:1.3em}
.prose li+li{margin-top:.45em}
.prose li::marker{color:var(--accent)}
.prose strong{color:var(--fg)}
.prose code{font-size:.9em;background:var(--surface-2);padding:2px 6px;border-radius:4px;overflow-wrap:anywhere}
.keybox{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px 22px}
.keybox h2,.keybox h3{font-size:1.2rem;margin:0 0 10px}
.keybox ul{margin:0}
.note{border-left:3px solid var(--alert);background:color-mix(in srgb,var(--alert) 8%,var(--bg));padding:14px 18px;border-radius:0 var(--r) var(--r) 0}
.note.ok{border-left-color:var(--ok);background:color-mix(in srgb,var(--ok) 7%,var(--bg))}
.steps{list-style:none;padding:0 !important;counter-reset:s;display:grid;gap:12px}
.steps>li{counter-increment:s;display:grid;grid-template-columns:40px minmax(0,1fr);gap:16px;margin:0 !important}
.steps>li::before{content:counter(s,decimal-leading-zero);font-family:var(--f-display);font-weight:800;font-size:1.5rem;color:var(--accent);line-height:1.2}
.steps b{display:block}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:48px}
.pager a{display:grid;gap:4px;padding:18px;border:1px solid var(--line);border-radius:var(--r);text-decoration:none;min-width:0}
.pager a:hover{border-color:var(--accent);color:var(--fg)}
.pager .eyebrow{font-size:.68rem}
.pager .next{text-align:right}
.pager b{font-family:var(--f-display);font-size:1.3rem;line-height:1.05}
@media (max-width:560px){.pager{grid-template-columns:1fr}.pager .next{text-align:left}}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);padding-block:48px 32px;font-size:.88rem;color:var(--muted)}
.foot-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,.8fr) minmax(0,1fr);gap:32px}
.foot-grid h2{font-size:1rem;letter-spacing:.06em;color:var(--fg);margin-bottom:10px}
.foot-links{display:grid;gap:6px;align-content:start}
.foot-links a{color:var(--muted);text-decoration:none}
.foot-links a:hover{color:var(--accent)}
.foot-grid address{font-style:normal}
.foot-grid p+p{margin-top:10px}
.copyright{margin-top:36px;padding-top:20px;border-top:1px solid var(--line);font-size:.78rem;color:var(--faint);display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px}
@media (max-width:820px){.foot-grid{grid-template-columns:1fr}}

@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
:lang(bg) body,:lang(bg){font-feature-settings:"locl" 0}