*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --c-primary:#284868;
  --c-primary-dark:#1a3048;
  --c-primary-light:#3a5a8a;
  --c-primary-glow:rgba(40,72,104,0.15);
  --c-accent:#e8912a;
  --c-accent-hover:#d07d1e;
  --c-accent-glow:rgba(232,145,42,0.2);
  --c-bg:#ffffff;
  --c-bg-alt:#f1f5f9;
  --c-bg-card:#ffffff;
  --c-text:#0f172a;
  --c-text-secondary:#475569;
  --c-text-muted:#94a3b8;
  --c-border:#e2e8f0;
  --c-border-light:#f1f5f9;
  --c-header-bg:rgba(255,255,255,0.85);
  --c-code-bg:#f1f5f9;
  --shadow-sm:0 1px 2px rgba(0,0,0,0.05);
  --shadow-md:0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg:0 8px 48px rgba(0,0,0,0.12);
  --shadow-xl:0 16px 64px rgba(0,0,0,0.16);
  --radius-sm:8px;
  --radius-md:12px;
  --radius-lg:20px;
  --radius-xl:28px;
  --font:system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --font-mono:'SF Mono','Cascadia Code','JetBrains Mono',monospace;
  --max-w:1200px;
  --header-h:64px;
  --transition:0.3s cubic-bezier(0.4,0,0.2,1)
}
@media(prefers-color-scheme:dark){
  :root{
    --c-primary:#3a6a9a;
    --c-primary-dark:#1a3048;
    --c-primary-light:#4a7aaa;
    --c-primary-glow:rgba(58,106,154,0.2);
    --c-bg:#0b1120;
    --c-bg-alt:#111b2e;
    --c-bg-card:#162240;
    --c-text:#f1f5f9;
    --c-text-secondary:#94a3b8;
    --c-text-muted:#64748b;
    --c-border:#1e3a5f;
    --c-border-light:#162240;
    --c-header-bg:rgba(11,17,32,0.88);
    --c-code-bg:#111b2e;
    --shadow-sm:0 1px 2px rgba(0,0,0,0.2);
    --shadow-md:0 4px 24px rgba(0,0,0,0.3);
    --shadow-lg:0 8px 48px rgba(0,0,0,0.4);
    --shadow-xl:0 16px 64px rgba(0,0,0,0.5)
  }
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  font-size:16px;
  line-height:1.6;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale
}
a{color:var(--c-primary-light);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--c-accent)}
img,video{max-width:100%;height:auto;display:block}
code{font-family:var(--font-mono);font-size:0.875em;background:var(--c-code-bg);padding:2px 6px;border-radius:4px}
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
/* Header */
.header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--header-h);
  background:var(--c-header-bg);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-border-light);
  transition:var(--transition)
}
.header .container{
  display:flex;align-items:center;justify-content:space-between;
  height:100%
}
.logo{
  display:flex;align-items:center;gap:12px;
  font-weight:700;font-size:1.25rem;color:var(--c-text);text-decoration:none
}
.logo:hover{color:var(--c-text)}
.logo-mark{flex-shrink:0;width:36px;height:36px}
.logo-mark svg{width:100%;height:100%}
.nav{display:flex;align-items:center;gap:8px}
.nav a{
  padding:8px 16px;border-radius:var(--radius-sm);
  font-size:0.9rem;font-weight:500;color:var(--c-text-secondary);
  transition:all var(--transition)
}
.nav a:hover{color:var(--c-text);background:var(--c-bg-alt)}
.nav a.cta{
  background:var(--c-accent);color:#fff;
  font-weight:600;padding:8px 20px
}
.nav a.cta:hover{background:var(--c-accent-hover);color:#fff}
.nav-toggle{
  display:none;flex-direction:column;gap:5px;
  background:none;border:none;cursor:pointer;padding:8px
}
.nav-toggle span{
  display:block;width:24px;height:2px;
  background:var(--c-text);border-radius:2px;
  transition:var(--transition)
}
/* Hero */
.hero{
  min-height:100vh;
  display:flex;align-items:center;
  padding:120px 0 80px;
  background:linear-gradient(135deg,var(--c-bg) 0%,var(--c-bg-alt) 50%,var(--c-bg) 100%);
  position:relative;overflow:hidden
}
.hero::before{
  content:'';position:absolute;top:-50%;right:-20%;
  width:800px;height:800px;
  background:radial-gradient(circle,var(--c-primary-glow) 0%,transparent 70%);
  pointer-events:none
}
.hero .container{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.hero-content{max-width:600px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:100px;
  font-size:0.8rem;font-weight:600;
  background:var(--c-primary-glow);color:var(--c-primary-light);
  margin-bottom:24px;border:1px solid var(--c-border-light)
}
.hero h1{font-size:clamp(2rem,5vw,3.5rem);font-weight:800;line-height:1.15;margin-bottom:20px;letter-spacing:-0.02em}
.hero h1 span{background:linear-gradient(135deg,var(--c-primary-light),var(--c-accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:1.15rem;color:var(--c-text-secondary);line-height:1.7;margin-bottom:36px;max-width:500px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 28px;border-radius:var(--radius-sm);
  font-size:1rem;font-weight:600;
  border:none;cursor:pointer;text-decoration:none;
  transition:all var(--transition)
}
.btn-primary{
  background:var(--c-accent);color:#fff;
  box-shadow:0 4px 16px var(--c-accent-glow)
}
.btn-primary:hover{background:var(--c-accent-hover);color:#fff;transform:translateY(-2px);box-shadow:0 8px 32px var(--c-accent-glow)}
.btn-secondary{
  background:transparent;color:var(--c-text);
  border:2px solid var(--c-border)
}
.btn-secondary:hover{background:var(--c-bg-alt);border-color:var(--c-text-secondary);transform:translateY(-2px)}
.btn-ghost{
  background:transparent;color:var(--c-text-secondary);padding:14px 20px
}
.btn-ghost:hover{color:var(--c-text);background:var(--c-bg-alt)}
.hero-visual{
  display:flex;justify-content:center;align-items:center;
  position:relative
}
.hero-visual-inner{
  width:100%;max-width:520px;
  background:var(--c-bg-card);
  border-radius:var(--radius-lg);
  border:1px solid var(--c-border);
  box-shadow:var(--shadow-xl);
  overflow:hidden;
  aspect-ratio:16/10;
  display:flex;align-items:center;justify-content:center;
  color:var(--c-text-muted);font-size:0.95rem
}
.hero-visual-inner svg{width:64px;height:64px;opacity:0.3;margin-bottom:12px}
.hero-visual-placeholder{text-align:center;padding:24px}
/* Sections */
.section{padding:100px 0}
.section-header{text-align:center;margin-bottom:64px}
.section-header h2{
  font-size:clamp(1.6rem,3.5vw,2.5rem);font-weight:800;
  margin-bottom:16px;letter-spacing:-0.02em
}
.section-header p{
  font-size:1.1rem;color:var(--c-text-secondary);
  max-width:600px;margin:0 auto
}
/* Features */
.features-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px
}
.feature-card{
  background:var(--c-bg-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius-md);
  padding:32px 28px;
  transition:all var(--transition)
}
.feature-card:hover{
  border-color:var(--c-primary-light);
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg)
}
.feature-icon{
  width:48px;height:48px;
  border-radius:var(--radius-sm);
  background:var(--c-primary-glow);
  display:flex;align-items:center;justify-content:center;
  margin-bottom:20px
}
.feature-icon svg{width:24px;height:24px;color:var(--c-primary-light)}
.feature-card h3{font-size:1.1rem;font-weight:700;margin-bottom:8px}
.feature-card p{font-size:0.92rem;color:var(--c-text-secondary);line-height:1.6}
/* Showcase */
.showcase-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;align-items:center
}
.showcase-content h3{font-size:1.5rem;font-weight:700;margin-bottom:16px}
.showcase-content p{color:var(--c-text-secondary);margin-bottom:20px;line-height:1.7}
.showcase-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.showcase-list li{
  display:flex;align-items:flex-start;gap:12px;
  font-size:0.95rem;color:var(--c-text-secondary)
}
.showcase-list li svg{
  flex-shrink:0;width:20px;height:20px;color:var(--c-accent);margin-top:2px
}
.showcase-visual{
  background:var(--c-bg-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  aspect-ratio:16/10;
  box-shadow:var(--shadow-lg);
  display:flex;align-items:center;justify-content:center
}
/* Stats */
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:32px;text-align:center
}
.stat-value{
  font-size:clamp(1.8rem,3vw,2.8rem);
  font-weight:800;
  background:linear-gradient(135deg,var(--c-primary-light),var(--c-accent));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text
}
.stat-label{font-size:0.9rem;color:var(--c-text-secondary);margin-top:4px}
/* Download CTA */
.cta-section{
  background:linear-gradient(135deg,var(--c-primary-dark),var(--c-primary));
  color:#fff;text-align:center;padding:100px 0
}
.cta-section h2{font-size:clamp(1.6rem,3vw,2.4rem);font-weight:800;margin-bottom:16px}
.cta-section p{font-size:1.1rem;margin-bottom:36px;opacity:0.85;max-width:500px;margin-left:auto;margin-right:auto}
.cta-section .btn-primary{
  background:#fff;color:var(--c-primary-dark);
  box-shadow:0 4px 24px rgba(0,0,0,0.2);
  font-size:1.1rem;padding:16px 36px
}
.cta-section .btn-primary:hover{background:var(--c-bg-alt);color:var(--c-primary-dark);transform:translateY(-2px)}
.cta-section .version-info{
  display:block;margin-top:16px;font-size:0.85rem;opacity:0.6
}
.cta-section .btn-ghost{color:rgba(255,255,255,0.7);border-color:rgba(255,255,255,0.2)}
.cta-section .btn-ghost:hover{color:#fff;background:rgba(255,255,255,0.1)}
/* FAQ */
.faq-section{background:var(--c-bg-alt)}
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:var(--c-bg-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius-md);
  overflow:hidden;
  transition:border-color var(--transition)
}
.faq-item[open]{border-color:var(--c-primary-light);box-shadow:var(--shadow-lg)}
.faq-item summary{
  list-style:none;cursor:pointer;
  padding:20px 24px;
  font-weight:600;font-size:1.02rem;color:var(--c-text);
  display:flex;justify-content:space-between;align-items:center;gap:16px
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";flex:none;width:9px;height:9px;margin-right:2px;
  border-right:2px solid var(--c-text-muted);
  border-bottom:2px solid var(--c-text-muted);
  transform:rotate(45deg);transition:transform var(--transition)
}
.faq-item[open] summary::after{transform:rotate(-135deg)}
.faq-item summary:hover{color:var(--c-primary-light)}
.faq-answer{padding:0 24px 20px}
.faq-answer p{color:var(--c-text-secondary);line-height:1.65;font-size:0.96rem;margin:0}
/* Media: video + screenshots */
.hero-video{width:100%;height:100%;object-fit:cover;display:block}
.demo-video{width:100%;height:100%;object-fit:contain;background:#0b1120;display:block}
.screenshots-section{background:var(--c-bg-alt)}
.screenshots-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;max-width:1040px;margin:0 auto}
.shot{margin:0}
.shot a{display:block;border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--c-border);box-shadow:var(--shadow-md);transition:transform var(--transition),box-shadow var(--transition)}
.shot a:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.shot img{width:100%;height:auto;display:block}
.shot figcaption{text-align:center;margin-top:14px;color:var(--c-text-secondary);font-size:0.95rem;font-weight:600}
@media(max-width:768px){
  .screenshots-grid{grid-template-columns:1fr;gap:20px}
}
/* Footer */
.footer{
  background:var(--c-bg-alt);
  border-top:1px solid var(--c-border);
  padding:64px 0 32px
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:48px;margin-bottom:48px
}
.footer-brand .logo{margin-bottom:12px}
.footer-brand p{font-size:0.88rem;color:var(--c-text-secondary);max-width:300px;line-height:1.6}
.footer-col h4{font-size:0.85rem;font-weight:700;text-transform:uppercase;letter-spacing:0.05em;color:var(--c-text-muted);margin-bottom:16px}
.footer-col a{
  display:block;padding:6px 0;
  font-size:0.92rem;color:var(--c-text-secondary)
}
.footer-col a:hover{color:var(--c-text)}
.footer-bottom{
  padding-top:24px;border-top:1px solid var(--c-border-light);
  display:flex;justify-content:space-between;align-items:center;
  font-size:0.84rem;color:var(--c-text-muted)
}
.footer-links{display:flex;gap:24px}
.footer-links a{color:var(--c-text-muted);font-size:0.84rem}
/* Download page */
.page-header{
  padding-top:calc(var(--header-h) + 48px);
  padding-bottom:48px;
  background:var(--c-bg-alt);
  border-bottom:1px solid var(--c-border)
}
.page-header h1{font-size:2rem;font-weight:800;margin-bottom:8px}
.page-header p{color:var(--c-text-secondary)}
.downloads-section{padding:64px 0}
.download-card{
  background:var(--c-bg-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius-md);
  padding:32px;
  transition:all var(--transition)
}
.download-card:hover{border-color:var(--c-primary-light);box-shadow:var(--shadow-md)}
.download-card.latest{
  border-color:var(--c-accent);
  box-shadow:0 0 0 1px var(--c-accent),var(--shadow-md);
  position:relative
}
.download-card.latest::before{
  content:'Latest';position:absolute;top:-1px;right:24px;
  transform:translateY(-50%);
  padding:4px 14px;border-radius:100px;
  background:var(--c-accent);color:#fff;
  font-size:0.75rem;font-weight:700;text-transform:uppercase;letter-spacing:0.05em
}
.download-version{font-size:1.4rem;font-weight:700;margin-bottom:4px}
.download-date{font-size:0.88rem;color:var(--c-text-secondary);margin-bottom:16px}
.download-changelog{font-size:0.92rem;color:var(--c-text-secondary);margin-bottom:20px;line-height:1.6}
.download-changelog ul{padding-left:20px;margin:8px 0}
.download-changelog li{margin-bottom:4px}
.changelog-more{display:none}
.changelog-more.open{display:block}
.changelog-toggle{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:8px;padding:4px 0;
  background:none;border:none;cursor:pointer;
  font-size:0.85rem;font-weight:500;
  color:var(--c-primary-light);transition:color var(--transition)
}
.changelog-toggle:hover{color:var(--c-accent)}
.download-files{display:flex;gap:12px;flex-wrap:wrap}
.download-files .btn{font-size:0.9rem;padding:10px 20px}
/* Versions table */
.versions-list{display:flex;flex-direction:column;gap:16px;margin-top:48px}
/* Responsive */
@media(max-width:1024px){
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .nav{display:none;position:fixed;top:var(--header-h);left:0;right:0;
    background:var(--c-header-bg);backdrop-filter:blur(12px);
    flex-direction:column;padding:16px;border-bottom:1px solid var(--c-border);
    gap:4px
  }
  .nav.open{display:flex}
  .nav-toggle{display:flex}
  .hero .container{grid-template-columns:1fr}
  .hero-content{text-align:center}
  .hero p{margin-left:auto;margin-right:auto}
  .hero-actions{justify-content:center}
  .hero-visual{display:none}
  .features-grid{grid-template-columns:1fr}
  .showcase-grid{grid-template-columns:1fr}
  .showcase-visual{order:-1}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:12px;text-align:center}
  .section{padding:64px 0}
  .section-header{margin-bottom:40px}
}
@media(max-width:480px){
  .container{padding:0 16px}
  .hero{padding:100px 0 60px}
  .hero-actions{flex-direction:column;align-items:center}
  .stats-grid{grid-template-columns:1fr 1fr;gap:24px}
}
/* Legal document (license page) */
.legal{
  padding-top:calc(var(--header-h) + 48px);
  padding-bottom:80px
}
.legal .container{max-width:840px}
.legal h1{
  font-size:2rem;font-weight:800;line-height:1.25;
  letter-spacing:-0.02em;
  margin:0 0 24px
}
.legal h2{
  font-size:1.25rem;font-weight:700;line-height:1.35;
  margin:40px 0 14px
}
.legal p{margin:0 0 16px;line-height:1.75;color:var(--c-text-secondary)}
.legal ul{
  list-style:disc outside;
  margin:0 0 16px;padding-left:26px
}
.legal li{margin:0 0 8px;line-height:1.75;color:var(--c-text-secondary)}
.legal strong{font-weight:700;color:var(--c-text)}
.legal hr{
  border:0;border-top:1px solid var(--c-border);
  margin:40px 0
}
.legal a{overflow-wrap:break-word;word-break:break-word}
.legal-table{
  overflow-x:auto;-webkit-overflow-scrolling:touch;
  margin:0 0 24px
}
.legal table{
  border-collapse:collapse;
  width:100%;min-width:560px;
  font-size:0.94rem
}
.legal th,.legal td{
  border:1px solid var(--c-border);
  padding:10px 14px;
  text-align:left;vertical-align:top;
  line-height:1.6
}
.legal th{font-weight:700;color:var(--c-text)}
.legal thead th{background:var(--c-bg-alt)}
.legal td{color:var(--c-text-secondary)}
/* Acceptance notice (download page) */
.page-header .legal-notice{
  margin:20px 0 0;
  padding:16px 20px;
  border-left:4px solid var(--c-accent);
  border-radius:var(--radius-sm);
  background:var(--c-bg-card);
  box-shadow:var(--shadow-sm);
  color:var(--c-text);
  line-height:1.65
}
.page-header .legal-notice a{font-weight:600;text-decoration:underline}