:root{
  --blue:#1d9bf0;
  --blue-dark:#1a8cd8;
  --dark:#0f1419;
  --gray-900:#15202b;
  --gray-700:#536471;
  --gray-300:#e1e8ed;
  --gray-100:#f7f9fa;
  --white:#ffffff;
  --radius:16px;
  --shadow:0 4px 24px rgba(0,0,0,0.08);
  --max:1100px;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  color:var(--dark);
  background:var(--gray-100);
  -webkit-font-smoothing:antialiased;
  line-height:1.6;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
img{max-width:100%;display:block;}
a{color:var(--blue);text-decoration:none;}
.container{max-width:var(--max);margin:0 auto;padding:0 20px;}

/* ===== HEADER ===== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,0.9);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--gray-300);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;}
.logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.05rem;color:var(--dark);}
.logo-text .accent{color:var(--blue);}
.main-nav{display:flex;gap:26px;}
.main-nav a{color:var(--gray-900);font-weight:500;font-size:0.95rem;transition:color .2s;}
.main-nav a:hover{color:var(--blue);}
.nav-toggle{display:none;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer;padding:8px;}
.nav-toggle span{width:22px;height:2px;background:var(--dark);border-radius:2px;}

/* ===== HERO / TOOL ===== */
.hero{
  padding:56px 0 40px;
  text-align:center;
  background:linear-gradient(180deg,#eaf6ff 0%,var(--gray-100) 100%);
}
.hero h1{
  font-size:2.1rem;font-weight:800;letter-spacing:-0.02em;margin-bottom:12px;color:var(--dark);
}
.hero h1 .accent{color:var(--blue);}
.hero p.sub{color:var(--gray-700);max-width:560px;margin:0 auto 30px;font-size:1.05rem;}

.downloader-box{
  max-width:640px;margin:0 auto;background:var(--white);
  border-radius:var(--radius);box-shadow:var(--shadow);
  padding:22px;border:1px solid var(--gray-300);
}
.input-row{display:flex;gap:10px;}
.input-row input[type="text"]{
  flex:1;padding:14px 16px;border:2px solid var(--gray-300);border-radius:12px;
  font-size:1rem;outline:none;transition:border-color .2s;
}
.input-row input[type="text"]:focus{border-color:var(--blue);}
.btn{
  background:var(--blue);color:#fff;border:none;padding:14px 24px;
  border-radius:12px;font-weight:700;font-size:1rem;cursor:pointer;
  transition:background .2s, transform .1s;white-space:nowrap;
}
.btn:hover{background:var(--blue-dark);}
.btn:active{transform:scale(0.97);}
.btn:disabled{opacity:0.6;cursor:not-allowed;}
.paste-hint{margin-top:10px;font-size:0.85rem;color:var(--gray-700);text-align:left;}

.status-box{margin-top:18px;text-align:left;font-size:0.95rem;}
.status-box.loading{color:var(--blue);}
.status-box.error{color:#e0245e;}

.result-card{
  margin-top:18px;border:1px solid var(--gray-300);border-radius:14px;overflow:hidden;
  text-align:left;background:var(--gray-100);
}
.result-card video, .result-card img{width:100%;display:block;background:#000;}
.result-links{padding:14px;display:flex;flex-wrap:wrap;gap:10px;}
.result-links a{
  background:var(--blue);color:#fff;padding:10px 16px;border-radius:10px;
  font-weight:600;font-size:0.9rem;
}
.result-links a:hover{background:var(--blue-dark);}

/* Steps */
.steps{padding:50px 0;}
.steps h2, .section h2{text-align:center;font-size:1.6rem;font-weight:800;margin-bottom:34px;}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.step-card{
  background:var(--white);border-radius:14px;padding:26px 20px;text-align:center;
  border:1px solid var(--gray-300);
}
.step-num{
  width:38px;height:38px;border-radius:50%;background:var(--blue);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;margin:0 auto 14px;
}
.step-card h3{font-size:1.05rem;margin-bottom:8px;}
.step-card p{color:var(--gray-700);font-size:0.92rem;}

/* Features */
.features{padding:10px 0 50px;}
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.feature-card{background:var(--white);border:1px solid var(--gray-300);border-radius:14px;padding:22px 18px;}
.feature-card h3{font-size:1rem;margin-bottom:6px;}
.feature-card p{color:var(--gray-700);font-size:0.88rem;}

/* Generic content section (about/faq/policy pages) */
.page-content{padding:44px 0 60px;}
.page-content h1{font-size:1.9rem;font-weight:800;margin-bottom:18px;}
.page-content h2{font-size:1.3rem;font-weight:700;margin:26px 0 10px;}
.page-content p{margin-bottom:14px;color:var(--gray-900);}
.page-content ul{margin:0 0 14px 22px;color:var(--gray-900);}
.page-content ul li{margin-bottom:6px;}

/* FAQ accordion */
.faq-item{border-bottom:1px solid var(--gray-300);padding:16px 0;}
.faq-q{
  display:flex;justify-content:space-between;align-items:center;
  cursor:pointer;font-weight:700;font-size:1rem;
}
.faq-q .plus{font-size:1.3rem;transition:transform .2s;}
.faq-item.open .faq-q .plus{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;color:var(--gray-700);font-size:0.95rem;}
.faq-item.open .faq-a{max-height:400px;padding-top:10px;}

/* Contact form */
.contact-form{max-width:560px;margin:0 auto;background:var(--white);padding:28px;border-radius:16px;border:1px solid var(--gray-300);}
.contact-form label{display:block;font-weight:600;margin-bottom:6px;font-size:0.9rem;}
.contact-form input, .contact-form textarea{
  width:100%;padding:12px 14px;border:1.5px solid var(--gray-300);border-radius:10px;
  margin-bottom:16px;font-family:inherit;font-size:0.95rem;outline:none;
}
.contact-form input:focus, .contact-form textarea:focus{border-color:var(--blue);}

/* Footer */
.site-footer{background:var(--gray-900);color:#c9d1d9;margin-top:auto;padding-top:44px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:24px;padding-bottom:30px;}
.footer-logo{color:#fff;font-weight:800;margin-bottom:10px;}
.footer-col h4{color:#fff;margin-bottom:12px;font-size:0.95rem;}
.footer-col ul{list-style:none;}
.footer-col ul li{margin-bottom:8px;}
.footer-col a{color:#c9d1d9;font-size:0.9rem;}
.footer-col a:hover{color:var(--blue);}
.footer-col p{font-size:0.88rem;color:#8b98a5;}
.footer-bottom{border-top:1px solid #22303c;padding:16px 0;margin-top:10px;text-align:center;}
.footer-bottom p{font-size:0.8rem;color:#8b98a5;}

/* Responsive */
@media (max-width:860px){
  .steps-grid{grid-template-columns:1fr;}
  .features-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:640px){
  .main-nav{
    position:fixed;top:64px;left:0;right:0;background:#fff;
    flex-direction:column;padding:16px 20px;gap:0;
    border-bottom:1px solid var(--gray-300);
    transform:translateY(-150%);opacity:0;transition:.2s;
  }
  .main-nav.open{transform:translateY(0);opacity:1;}
  .main-nav a{padding:12px 0;border-bottom:1px solid var(--gray-100);}
  .nav-toggle{display:flex;}
  .hero h1{font-size:1.5rem;}
  .input-row{flex-direction:column;}
  .features-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;text-align:center;}
}