/* hiddenway.info/english/ - ShadowLingua. System fonts, no web fonts, no framework. */
:root{
  --bg:#0b1220; --panel:#111a2e; --line:#1f2b45; --ink:#e7edf7; --mute:#93a3bf;
  --teal:#5eead4; --teal2:#2dd4bf; --amber:#fbbf24; --w:1080px; --g:18px; --r:14px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans","Noto Sans Arabic","Noto Sans Devanagari",sans-serif}
a{color:var(--teal)}a:hover{color:#fff}
.wrap{max-width:var(--w);margin:0 auto;padding:0 var(--g)}
.skip{position:absolute;top:0;inset-inline-start:0;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.skip:focus{width:auto;height:auto;clip-path:none;top:8px;inset-inline-start:8px;background:#fff;color:#000;padding:8px;z-index:9}
h1{font-size:clamp(30px,5vw,50px);line-height:1.12;margin:.2em 0 .35em;letter-spacing:-.02em}
h2{font-size:clamp(22px,3vw,28px);margin:2.2em 0 .7em}
h3{font-size:18px;margin:1.6em 0 .6em;color:var(--teal)}
.lead{font-size:18px;color:#c8d3e6;max-width:680px}
.kicker{color:var(--teal);font-weight:600;letter-spacing:.06em;text-transform:uppercase;font-size:13px;margin:0}
.fine{color:var(--mute);font-size:13px}
.prose{max-width:760px}.prose p,.prose li{color:#cdd7e8}

/* header */
header.top{border-bottom:1px solid var(--line);background:rgba(11,18,32,.92);position:sticky;top:0;z-index:5;backdrop-filter:blur(8px)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px;flex-wrap:wrap}
.brand{font-weight:800;font-size:21px;color:#fff;text-decoration:none;letter-spacing:-.02em}
.brand span{color:var(--teal)}
header nav{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
header nav a{color:#c8d3e6;text-decoration:none;font-size:15px}
header nav a.cta{background:var(--teal);color:#062b27;padding:7px 14px;border-radius:999px;font-weight:700}

/* buttons */
.btn{display:inline-block;background:var(--teal);color:#062b27;font-weight:700;padding:12px 22px;border-radius:999px;text-decoration:none;margin:6px 10px 0 0;transition:transform .15s,background .15s}
.btn:hover{transform:translateY(-2px);background:#99f6e4;color:#062b27}
.btn.ghost{background:transparent;color:var(--teal);border:1px solid var(--teal)}
[dir=rtl] .btn{margin:6px 0 0 10px}

/* hero with the self-running demo */
.hero{padding:56px 0 30px;background:
  radial-gradient(900px 400px at 85% -10%,rgba(94,234,212,.16),transparent 60%),
  radial-gradient(700px 300px at -10% 110%,rgba(251,191,36,.08),transparent 60%)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center}
.hero h1 em{font-style:normal;color:var(--teal)}
.demo{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:28px 24px;box-shadow:0 20px 60px rgba(0,0,0,.35)}
.wave{display:flex;align-items:center;gap:4px;height:70px;margin-bottom:18px}
.wave i{flex:1;background:linear-gradient(var(--teal),var(--teal2));border-radius:3px;height:var(--h);
  animation:pulse 1.1s ease-in-out var(--d) infinite alternate;opacity:.85}
@keyframes pulse{from{transform:scaleY(.35)}to{transform:scaleY(1)}}
.build{font-size:22px;font-weight:700;line-height:1.5;min-height:3em;margin:0}
.build .c{opacity:.6;animation:reveal 9s infinite}   /* dim state .6 (not .15): keeps 4.5:1 contrast at every frame, launch gate 2026-10-16 */
/* the tail lights first, then grows toward the front - the method itself */
.build .c2{animation-delay:0s}.build .c1{animation-delay:1.6s}.build .c0{animation-delay:3.2s}
@keyframes reveal{0%{opacity:.6;color:var(--ink)}8%{opacity:1;color:var(--teal)}60%{opacity:1;color:#fff}85%,100%{opacity:.6}}
.hint{color:var(--mute);font-size:13px;margin:.6em 0 0}
@media (prefers-reduced-motion:reduce){.wave i,.build .c{animation:none;opacity:1}}

/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.card{display:flex;flex-direction:column;gap:6px;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
  padding:14px;text-decoration:none;color:var(--ink);transition:transform .18s,border-color .18s}
.card:hover{transform:translateY(-3px);border-color:var(--teal)}
.card img{width:100%;height:auto;border-radius:10px;aspect-ratio:16/9;object-fit:cover}
.card b{font-size:17px;line-height:1.35}
.card .tag{color:var(--teal);font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.05em}
.card .meta{color:var(--mute);font-size:13px}
.lang-card p{color:#c8d3e6;font-size:14px;margin:0}
.lang-card .btn{align-self:flex-start;margin-top:6px}

/* steps */
.steps{counter-reset:s;list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px}
.steps li{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:16px;counter-increment:s;color:#cdd7e8;font-size:15px}
.steps li::before{content:counter(s);display:block;font-size:26px;font-weight:800;color:var(--teal);margin-bottom:6px}
.steps b{color:#fff;display:block}

/* categories: clear rows of courses */
.rows{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.row{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:6px 16px 14px}
.row h3{margin:.9em 0 .5em}
.row ul{list-style:none;margin:0;padding:0}
.row li{display:flex;justify-content:space-between;gap:10px;padding:7px 0;border-top:1px solid var(--line);font-size:15px}
.row li:first-child{border-top:0}
.row li a{text-decoration:none}
.row li.soon{color:var(--mute)}
.count{font-size:12px;color:var(--mute);white-space:nowrap}
.row li a + .count{color:var(--teal)}

.langs{display:flex;flex-wrap:wrap;gap:8px}
.langs a{background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:7px 14px;text-decoration:none;color:#dbe4f3;font-size:15px}
.langs a:hover{border-color:var(--teal);color:#fff}
.langlist{columns:3 180px;padding:0;list-style:none}.langlist li{padding:4px 0}

.buy{background:linear-gradient(135deg,#10233a,#0f1d33);border:1px solid var(--line);border-radius:22px;padding:8px 28px 28px;margin-top:40px}

/* session page */
.crumbs{padding-top:18px;font-size:14px;color:var(--mute)}.crumbs i{font-style:normal;margin:0 6px}
.yt{position:relative;display:block;width:100%;aspect-ratio:16/9;border:0;padding:0;border-radius:var(--r);overflow:hidden;
  background:#000;cursor:pointer;margin:18px 0 10px}
.yt img{width:100%;height:100%;object-fit:cover;display:block;opacity:.9;transition:opacity .2s}
.yt:hover img{opacity:1}
.yt .play{position:absolute;inset:0;margin:auto;width:78px;height:78px;border-radius:50%;background:rgba(94,234,212,.95);
  box-shadow:0 0 0 12px rgba(94,234,212,.2)}
.yt .play::after{content:"";position:absolute;left:31px;top:24px;border-left:24px solid #062b27;border-top:15px solid transparent;border-bottom:15px solid transparent}
iframe{width:100%;aspect-ratio:16/9;border:0;border-radius:var(--r);margin:18px 0 10px}
.howto{color:#c8d3e6;font-size:14px}
.chapters{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:10px 18px;margin:16px 0}
.chapters summary{cursor:pointer;font-weight:700}
.chapters ol{columns:2 220px;padding-inline-start:18px;font-size:14px;color:#c8d3e6}
.block{margin-top:10px}
.sents{list-style:none;padding:0;margin:0}
.sents li{border-top:1px solid var(--line);padding:10px 0}
.sents .s{margin:0;font-size:17px;color:#fff}
.sents .n{display:inline-block;min-width:30px;color:var(--teal);font-weight:800}
.sents .ch{margin:4px 0 0 30px;color:var(--mute);font-size:14px}
[dir=rtl] .sents .ch{margin:4px 30px 0 0}
.sents .ch span{margin-inline-end:12px}
.dict{columns:2 220px;color:#c8d3e6}
.buy-inline{margin-top:28px;padding:14px 18px;border:1px dashed var(--line);border-radius:var(--r)}
.sessions li{padding:10px 0;border-top:1px solid var(--line)}.sessions .meta{display:block;color:var(--mute);font-size:13px}

footer{margin-top:60px;border-top:1px solid var(--line);padding:24px 0 40px;color:#c8d3e6;font-size:14px}

@media (max-width:760px){
  .hero-grid{grid-template-columns:1fr}.hero{padding-top:30px}
  header nav{gap:12px}header nav a{font-size:14px}
  .build{font-size:19px}
}

.practise-cta{margin:18px 0 6px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}.practise-cta .btn{margin:0}