/* ==========================================================
   Stand By Tech — main stylesheet
   ========================================================== */
:root{
  --bg:#141313;
  --bg-2:#1c1b1b;
  --card:#222121;
  --line:#2f2d2d;
  --text:#f2efe9;
  --muted:#a9a49b;
  --accent:#ffb020;
  --accent-2:#ff7a1a;
  --ok:#3ccf91;
  --radius:14px;
  --max:1160px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--text);
  font-family:"Inter",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased;
}
img,video{max-width:100%;display:block}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{font-family:"Space Grotesk","Inter",sans-serif;line-height:1.15;letter-spacing:-.02em}
h1{font-size:clamp(2.2rem,5.5vw,3.8rem)}
h2{font-size:clamp(1.7rem,3.5vw,2.5rem)}
h3{font-size:1.25rem}
p{color:var(--muted)}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px}
.section{padding:80px 0}
.section-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.eyebrow{display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
.section-head{max-width:680px;margin-bottom:44px}
.section-head p{margin-top:12px}
.center{text-align:center;margin-left:auto;margin-right:auto}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(20,19,19,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:10px;color:var(--text);font-family:"Space Grotesk",sans-serif;font-weight:700;font-size:1.25rem}
.logo:hover{text-decoration:none}
.logo svg{width:34px;height:34px}
.logo span b{color:var(--accent)}
.nav-links{display:flex;gap:6px;list-style:none;align-items:center}
.nav-links a{color:var(--muted);padding:8px 14px;border-radius:999px;font-weight:500;font-size:.95rem}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:var(--card);text-decoration:none}
.nav-links a.btn{color:#1a1200}
.menu-toggle{display:none;background:none;border:1px solid var(--line);color:var(--text);border-radius:10px;width:44px;height:44px;cursor:pointer;font-size:1.3rem}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#1a1200;font-weight:700;padding:13px 24px;border-radius:999px;border:0;cursor:pointer;font-size:1rem;transition:transform .15s,box-shadow .15s}
.btn:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 8px 24px rgba(255,160,32,.3)}
.btn svg{width:18px;height:18px;flex:none}
.btn{white-space:nowrap}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--accent);box-shadow:none}
.nav-links .btn{padding:9px 18px}

/* ---------- Hero ---------- */
.hero{position:relative;padding:110px 0 90px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-40% -10% auto auto;width:700px;height:700px;background:radial-gradient(circle,rgba(255,176,32,.18),transparent 65%);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:center;position:relative}
.hero h1 span{background:linear-gradient(135deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:1.2rem;margin:20px 0 32px;max-width:540px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:28px;box-shadow:var(--shadow)}
.hero-card .screen{aspect-ratio:16/10;border-radius:12px;background:#0d0c0c;border:1px solid var(--line);display:grid;place-items:center;margin-bottom:18px;overflow:hidden}
.hero-card .screen video{width:100%;height:100%;object-fit:cover}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;text-align:center}
.hero-stats strong{display:block;font-family:"Space Grotesk",sans-serif;font-size:1.5rem;color:var(--text)}
.hero-stats small{color:var(--muted);font-size:.8rem}
.page-hero{padding:80px 0 50px;border-bottom:1px solid var(--line);background:radial-gradient(ellipse at top right,rgba(255,176,32,.1),transparent 60%)}
.page-hero p{max-width:620px;margin-top:14px;font-size:1.1rem}

/* ---------- Cards ---------- */
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:border-color .2s,transform .2s}
.card:hover{border-color:#4a4545;transform:translateY(-3px)}
.card .icon{width:48px;height:48px;border-radius:12px;display:grid;place-items:center;background:rgba(255,176,32,.12);color:var(--accent);margin-bottom:18px}
.card .icon svg{width:24px;height:24px}
.card h3{margin-bottom:8px}

/* ---------- Video cards ---------- */
.video-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:border-color .2s}
.video-card:hover{border-color:#4a4545}
.video-card video{width:100%;aspect-ratio:16/9;background:#000;object-fit:contain}
.video-card .body{padding:20px 22px 24px;flex:1}
.tag{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:4px 10px;border-radius:999px;background:rgba(255,176,32,.12);color:var(--accent);margin-bottom:10px}
.tag.pc{background:rgba(60,207,145,.12);color:var(--ok)}
.video-card h3{margin-bottom:6px}
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:32px}
.filter-btn{background:var(--card);border:1px solid var(--line);color:var(--muted);padding:9px 18px;border-radius:999px;cursor:pointer;font:inherit;font-size:.95rem;font-weight:500}
.filter-btn.active,.filter-btn:hover{color:#1a1200;background:var(--accent);border-color:var(--accent)}
.video-card.hidden{display:none}

/* ---------- FAQ ---------- */
.faq{max-width:820px}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);margin-bottom:12px;overflow:hidden}
.faq summary{cursor:pointer;padding:20px 24px;font-weight:600;font-size:1.05rem;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:1.5rem;font-weight:400;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details>div{padding:0 24px 22px}
.faq details>div p+p{margin-top:10px}
.faq ul{margin:10px 0 0 20px;color:var(--muted)}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(135deg,#2a1d06,#1c1b1b 60%);border:1px solid #3d2e12;border-radius:24px;padding:56px;display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap}
.cta-band p{margin-top:10px;max-width:520px}

/* ---------- About ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-visual{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:40px;display:grid;place-items:center;aspect-ratio:1/1}
.about-visual svg{width:70%;height:auto}
.checklist{list-style:none;margin-top:22px}
.checklist li{padding-left:32px;position:relative;margin-bottom:12px;color:var(--muted)}
.checklist li::before{content:"✓";position:absolute;left:0;top:0;width:22px;height:22px;border-radius:50%;background:rgba(60,207,145,.15);color:var(--ok);display:grid;place-items:center;font-size:.8rem;font-weight:700}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:40px}
form .field{margin-bottom:18px}
label{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px}
input,textarea,select{width:100%;background:var(--bg-2);border:1px solid var(--line);color:var(--text);border-radius:10px;padding:13px 15px;font:inherit;font-size:1rem}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent)}
textarea{min-height:150px;resize:vertical}
.hp{position:absolute;left:-9999px;opacity:0;height:0;width:0}
.alert{padding:14px 18px;border-radius:10px;margin-bottom:22px;font-weight:500}
.alert.ok{background:rgba(60,207,145,.12);border:1px solid rgba(60,207,145,.4);color:var(--ok)}
.alert.err{background:rgba(255,90,90,.1);border:1px solid rgba(255,90,90,.4);color:#ff8a8a}
.contact-side .card{margin-bottom:18px}
.social{display:flex;gap:12px;margin-top:14px}
.social a{width:44px;height:44px;border-radius:12px;background:var(--bg-2);border:1px solid var(--line);display:grid;place-items:center;color:var(--text)}
.social a:hover{border-color:var(--accent);color:var(--accent)}
.social svg{width:20px;height:20px}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);padding:56px 0 30px;margin-top:40px;background:var(--bg-2)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-grid h4{font-size:1rem;margin-bottom:14px}
.footer-grid ul{list-style:none}
.footer-grid li{margin-bottom:8px}
.footer-grid li a{color:var(--muted)}
.footer-grid li a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid var(--line);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.88rem;color:var(--muted)}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s,transform .6s}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .hero-grid,.split,.contact-grid{grid-template-columns:1fr}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .menu-toggle{display:block}
  .nav-links{position:absolute;top:70px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--bg);border-bottom:1px solid var(--line);padding:12px 16px 20px;display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 14px;border-radius:10px}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .section{padding:60px 0}
  .hero{padding:70px 0 60px}
  .cta-band{padding:34px 24px}
  .footer-grid{grid-template-columns:1fr}
  .container{padding:0 16px}
}