/* Tendvane website — shared styles. Dark theme matching the app. */
:root{
  --bg:#0b0d11; --bg2:#0f131a; --panel:#141923; --panel2:#1a2030;
  --line:#232b3a; --txt:#e7ecf5; --muted:#94a0b4; --accent:#4da3ff; --accent2:#39d3bb;
  --ok:#46d18a; --radius:14px; --maxw:1080px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(1200px 600px at 80% -10%,rgba(77,163,255,.10),transparent 60%),var(--bg);
  color:var(--txt);font:16px/1.6 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
h1,h2,h3{line-height:1.2;margin:0 0 .5em}
h1{font-size:clamp(32px,5vw,52px);letter-spacing:-.5px}
h2{font-size:clamp(24px,3.5vw,34px);margin-top:0}
.muted{color:var(--muted)}
.center{text-align:center}

/* header / nav */
header.site{position:sticky;top:0;z-index:50;background:rgba(11,13,17,.72);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;gap:18px;height:62px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--txt)}
.brand:hover{text-decoration:none}
.brand svg{width:26px;height:26px;flex:0 0 auto}
nav.main{margin-left:auto;display:flex;gap:6px;align-items:center;flex-wrap:wrap}
nav.main a{color:var(--muted);padding:8px 12px;border-radius:9px;font-size:14px;font-weight:600}
nav.main a:hover{color:var(--txt);background:var(--panel);text-decoration:none}
nav.main a.active{color:var(--txt)}
#langpick{background:var(--panel);color:var(--txt);border:1px solid var(--line);border-radius:9px;
  padding:7px 9px;font-size:13px;font-weight:600;cursor:pointer;margin-left:4px}
#langpick:hover{border-color:var(--accent)}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#04121f;font-weight:700;
  padding:11px 18px;border-radius:11px;border:0;cursor:pointer;font-size:15px;transition:transform .08s,filter .12s}
.btn:hover{filter:brightness(1.08);text-decoration:none;transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--txt);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--accent);background:var(--panel)}
.btn.lg{padding:14px 26px;font-size:17px;border-radius:13px}

/* hero */
.hero{padding:72px 0 40px;text-align:center}
.hero .tag{display:inline-block;color:var(--accent2);font-weight:700;letter-spacing:.5px;font-size:13px;
  text-transform:uppercase;background:rgba(57,211,187,.1);border:1px solid rgba(57,211,187,.25);padding:5px 12px;border-radius:999px;margin-bottom:18px}
.hero p.lead{font-size:clamp(17px,2.2vw,21px);color:var(--muted);max-width:680px;margin:0 auto 28px}
.hero .cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.meta{margin-top:16px;color:var(--muted);font-size:14px}
.meta b{color:var(--txt)}

/* sections */
section{padding:46px 0}
.lead-sub{color:var(--muted);max-width:640px;margin:0 auto 36px;text-align:center}

/* feature grid */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:border-color .15s,transform .1s}
.card:hover{border-color:#2f3b50;transform:translateY(-2px)}
.card .ico{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(77,163,255,.18),rgba(57,211,187,.14));margin-bottom:14px;font-size:20px}
.card h3{font-size:18px;margin-bottom:6px}
.card p{color:var(--muted);font-size:14.5px;margin:0}

/* shots */
.shots{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.shot{background:var(--panel2);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;aspect-ratio:16/10;
  display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:14px;text-align:center;padding:16px}
.shot img{width:100%;height:100%;object-fit:cover;display:block}
figure.screenshot{margin:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:0 24px 60px rgba(0,0,0,.45);background:var(--panel2)}
figure.screenshot img{display:block;width:100%;height:auto}

/* panels / band */
.band{background:linear-gradient(180deg,var(--bg2),var(--bg));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center}
@media(max-width:760px){.split{grid-template-columns:1fr}}

/* download cards */
.dl{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:26px 0}
@media(max-width:680px){.dl{grid-template-columns:1fr}}
.dlcard{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;text-align:center}
.dlcard h3{font-size:20px}
.dlcard .sz{color:var(--muted);font-size:13px;margin:6px 0 18px}

/* lists */
ul.feat{list-style:none;padding:0;margin:0}
ul.feat li{padding:9px 0 9px 30px;position:relative;border-bottom:1px solid var(--line);color:var(--muted)}
ul.feat li:last-child{border-bottom:0}
ul.feat li::before{content:"";position:absolute;left:4px;top:15px;width:8px;height:8px;border-radius:50%;
  background:var(--accent)}
ul.feat li b{color:var(--txt)}

/* faq */
details.faq{background:var(--panel);border:1px solid var(--line);border-radius:12px;margin:10px 0;padding:2px 18px}
details.faq>summary{cursor:pointer;font-weight:700;padding:14px 0;list-style:none}
details.faq>summary::-webkit-details-marker{display:none}
details.faq>summary::before{content:"+";color:var(--accent);font-weight:800;margin-right:10px}
details.faq[open]>summary::before{content:"\2013"}
details.faq .body{color:var(--muted);padding:0 0 14px 22px}

/* changelog */
.ver{border-left:2px solid var(--line);padding:0 0 26px 22px;position:relative;margin-left:6px}
.ver::before{content:"";position:absolute;left:-7px;top:4px;width:12px;height:12px;border-radius:50%;background:var(--accent);border:3px solid var(--bg)}
.ver h3{font-size:18px;margin-bottom:2px}
.ver .date{color:var(--muted);font-size:13px;margin-bottom:10px}
.ver ul{color:var(--muted);margin:0;padding-left:18px}
.ver ul li{margin:4px 0}

/* callout */
.note{background:rgba(77,163,255,.07);border:1px solid rgba(77,163,255,.25);border-radius:12px;padding:16px 18px;color:var(--muted);font-size:14.5px}
.note b{color:var(--txt)}

/* footer */
footer.site{border-top:1px solid var(--line);margin-top:40px;padding:36px 0;color:var(--muted);font-size:14px}
footer.site .wrap{display:flex;gap:20px;flex-wrap:wrap;align-items:center;justify-content:space-between}
footer.site nav{display:flex;gap:16px;flex-wrap:wrap}
.langs{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:10px}
.langs span{background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:4px 11px;font-size:12.5px;color:var(--muted)}