/* Vivideo Studio — site styles.
   Palette lifted from the editor: teal accent, cyan highlight, near-black
   surfaces, so the site and the app read as the same product. */
:root{
  --bg:#0F1319;
  --surface:#15181F;
  --surface-2:#1A1F28;
  --chip:#252B38;
  --line:#262C38;
  --teal:#26A69A;
  --cyan:#00E5FF;
  --amber:#FFB300;
  --red:#FF5252;
  --green:#4CAF50;
  --text:#E7ECF2;
  --muted:#9AA7B4;
  --faint:#6C7889;
  --radius:10px;
  --wrap:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font:15px/1.65 "Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}

/* ---------- header ---------- */
header{
  position:sticky;top:0;z-index:50;
  background:rgba(15,19,25,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:18px;height:60px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--text)}
.brand:hover{text-decoration:none}
.brand .mark{
  width:26px;height:26px;border-radius:7px;flex:none;
  background:linear-gradient(135deg,var(--teal),var(--cyan));
  display:grid;place-items:center;color:#08121a;font-size:14px;font-weight:800;
}
.brand small{display:block;font-weight:400;font-size:10px;color:var(--faint);letter-spacing:.08em;text-transform:uppercase}
.nav nav{margin-left:auto;display:flex;gap:6px;flex-wrap:wrap}
.nav nav a{
  color:var(--muted);padding:7px 12px;border-radius:7px;font-size:13.5px;
  border:1px solid transparent;
}
.nav nav a:hover{color:var(--text);background:var(--chip);text-decoration:none}
.nav nav a.on{color:var(--text);background:rgba(38,166,154,.16);border-color:var(--teal)}
.nav nav a.store-link{color:#06131a;background:var(--cyan);font-weight:700}
.nav nav a.store-link:hover{background:#7af1ff}

/* ---------- hero ---------- */
.hero{padding:74px 0 56px;border-bottom:1px solid var(--line);
  background:
    radial-gradient(900px 380px at 15% -10%,rgba(38,166,154,.16),transparent 60%),
    radial-gradient(700px 340px at 88% 0%,rgba(0,229,255,.10),transparent 60%);
}
.hero h1{font-size:clamp(30px,5vw,48px);line-height:1.12;margin:0 0 16px;letter-spacing:-.5px}
.hero.home-hero{padding-top:28px}
.hero-image{display:block;width:100%;height:auto;margin:0 0 32px;
  border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 16px 48px rgba(0,0,0,.3)}
.hero h1 .grad{background:linear-gradient(90deg,var(--teal),var(--cyan));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:17px;color:var(--muted);max-width:660px;margin:0 0 26px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.btn{
  display:inline-block;padding:11px 20px;border-radius:8px;font-weight:600;font-size:14px;
  border:1px solid var(--line);color:var(--text);background:var(--chip);
}
.btn:hover{text-decoration:none;border-color:var(--teal)}
.btn.primary{background:linear-gradient(135deg,var(--teal),#00897B);border-color:transparent;color:#06131a}
.badges{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}
.badge{font-size:11.5px;color:var(--muted);background:var(--surface);
  border:1px solid var(--line);border-radius:999px;padding:5px 11px}

/* ---------- sections ---------- */
section{padding:56px 0;border-bottom:1px solid var(--line)}
section:last-of-type{border-bottom:none}
.sec-head{margin-bottom:26px}
.sec-head h2{font-size:24px;margin:0 0 8px;letter-spacing:-.2px}
.sec-head p{color:var(--muted);margin:0;max-width:680px}
.eyebrow{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--teal);
  font-weight:700;margin:0 0 8px}

/* ---------- cards ---------- */
.grid{display:grid;gap:14px}
.g3{grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
.g2{grid-template-columns:repeat(auto-fill,minmax(380px,1fr))}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;display:block;color:inherit;transition:border-color .15s,transform .15s;
}
a.card:hover{text-decoration:none;border-color:var(--teal);transform:translateY(-2px)}
.card h3{margin:0 0 8px;font-size:16px;display:flex;align-items:center;gap:9px}
.card p{margin:0;color:var(--muted);font-size:13.5px}
.ico{width:30px;height:30px;border-radius:8px;display:grid;place-items:center;flex:none;
  background:rgba(38,166,154,.14);color:var(--teal);font-size:15px}
.meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.tag{font-size:11px;padding:3px 9px;border-radius:999px;background:var(--chip);color:var(--muted);
  border:1px solid var(--line)}
.tag.beginner{color:var(--green);border-color:rgba(76,175,80,.4)}
.tag.intermediate{color:var(--amber);border-color:rgba(255,179,0,.4)}
.tag.advanced{color:var(--red);border-color:rgba(255,82,82,.4)}

/* ---------- tutorials ---------- */
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}
.filters button{
  font:inherit;font-size:13px;cursor:pointer;color:var(--muted);
  background:var(--chip);border:1px solid var(--line);border-radius:7px;padding:7px 13px;
}
.filters button:hover{color:var(--text)}
.filters button.on{color:var(--text);background:rgba(38,166,154,.16);border-color:var(--teal)}
.search{
  width:100%;max-width:420px;margin-bottom:18px;font:inherit;font-size:14px;color:var(--text);
  background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:10px 13px;
}
.search:focus{outline:none;border-color:var(--teal)}
.empty{color:var(--faint);padding:30px 0}

/* ---------- article ---------- */
.topic{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;margin-bottom:16px}
.topic > h2{margin:0 0 6px;font-size:20px}
.topic .lede{color:var(--muted);margin:0 0 16px}
ol.steps{margin:0;padding:0;list-style:none;counter-reset:s}
ol.steps > li{position:relative;padding:0 0 16px 40px;counter-increment:s}
ol.steps > li::before{
  content:counter(s);position:absolute;left:0;top:0;width:26px;height:26px;border-radius:8px;
  display:grid;place-items:center;font-size:12px;font-weight:700;
  background:rgba(38,166,154,.16);color:var(--teal);border:1px solid rgba(38,166,154,.35);
}
ol.steps h4{margin:3px 0 5px;font-size:14.5px}
ol.steps p{margin:0;color:var(--muted);font-size:13.5px}
.kbd{display:inline-block;font:12px ui-monospace,Consolas,monospace;background:var(--chip);
  border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;padding:1px 7px;color:var(--text)}
.note{margin-top:8px;padding:9px 12px;border-left:2px solid var(--teal);background:var(--surface-2);
  border-radius:0 7px 7px 0;font-size:13px;color:var(--muted)}
.note b{color:var(--teal);font-weight:600}
.tips{margin:16px 0 0;padding:14px 16px;background:var(--surface-2);border:1px solid var(--line);
  border-radius:8px}
.tips h4{margin:0 0 8px;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--teal)}
.tips ul{margin:0;padding-left:18px;color:var(--muted);font-size:13.5px}
.tips li{margin-bottom:5px}
.tips li:last-child{margin-bottom:0}

/* ---------- prose (legal / contact) ---------- */
.prose{max-width:760px}
.prose h2{font-size:19px;margin:30px 0 10px}
.prose h2:first-child{margin-top:0}
.prose p,.prose li{color:var(--muted)}
.prose ul{padding-left:20px}
.prose strong{color:var(--text)}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:30px 0;color:var(--faint);font-size:13px}
.foot{display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.foot nav{margin-left:auto;display:flex;gap:14px;flex-wrap:wrap}
.foot a{color:var(--muted)}

@media (max-width:900px){
  .home-hero{overflow-wrap:break-word}
  header:has(.store-link) .nav{height:auto;min-height:60px;padding-top:10px;padding-bottom:10px;flex-wrap:wrap}
  header:has(.store-link) .nav nav{margin-left:0;width:100%}
}

@media (max-width:640px){
  .nav{height:auto;padding:10px 0;flex-wrap:wrap}
  .nav nav{margin-left:0;width:100%}
  .hero{padding:48px 0 40px}
  section{padding:40px 0}
}