/* DocumentEase — Professional Engineering Documentation Platform
   Clean, modern, high-trust design aesthetic
   - Dark, neutral, engineering-first
   - No external fonts; system UI stack
   - Stripe/Notion/Vercel-inspired but for engineering systems
*/

:root{
  --bg: #0b1220;
  --panel: #0f1a2e;
  --panel-2: #0c1526;
  --surface: rgba(255,255,255,0.03);
  --surface-hover: rgba(255,255,255,0.05);
  --line: rgba(255,255,255,0.10);
  --line-strong: rgba(255,255,255,0.15);
  --fg: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.68);
  --muted-2: rgba(255,255,255,0.50);
  --accent: #49c6e5;
  --accent-2: #2f6fed;
  --focus: #49c6e5;

  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --maxw: 1200px;
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 48px;
  --spacing-xl: 80px;
}

*{box-sizing:border-box}
html{color-scheme: dark;}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, "Noto Sans", "Liberation Sans", sans-serif;
  line-height:1.6;
  background: var(--bg);
  color: var(--fg);
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a{color: var(--accent); text-decoration: none;}
a:hover{text-decoration: underline;}
a:focus-visible, button:focus-visible{outline: 2px solid var(--focus); outline-offset: 3px;}

.skip-link{
  position:absolute;
  left:-9999px;
  top:0;
  background: var(--panel);
  color: var(--fg);
  padding:10px 12px;
  border:1px solid var(--line);
  border-radius: var(--radius-sm);
}
.skip-link:focus{left:12px; top:12px; z-index:1000;}

/* Header */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11,18,32,0.85);
  backdrop-filter: blur(12px) saturate(180%);
  border-bottom: 1px solid var(--line);
}

.container{
  width: min(var(--maxw), calc(100% - 48px));
  margin: 0 auto;
}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding: 16px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  white-space: nowrap;
}

.brand a{
  color: var(--fg);
  text-decoration:none;
  font-weight: 600;
  letter-spacing: -0.2px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
}

.brand-logo {
  width: 28px;
  height: 28px;
  display: block;
}

.nav{
  display:flex;
  align-items:center;
  gap: 4px;
  flex-wrap: wrap;
  justify-content:flex-end;
}

.nav a{
  color: var(--muted);
  text-decoration:none;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: all 120ms ease;
  font-size: 0.94rem;
}

.nav a[aria-current="page"]{
  color: var(--fg);
  background: var(--surface);
}

.nav a:hover{
  color: var(--fg);
  background: var(--surface);
  text-decoration:none;
}

/* Hero Section */
.hero-section{
  padding: var(--spacing-xl) 0 var(--spacing-lg);
  text-align: center;
}

.hero-content{
  max-width: 720px;
  margin: 0 auto;
}

.hero-section h1{
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin: 0 0 var(--spacing-md);
  color: var(--fg);
}

.hero-subtitle{
  font-size: 1.25rem;
  color: var(--muted);
  margin: 0 0 var(--spacing-lg);
  line-height: 1.5;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions{
  display:flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.button{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--fg);
  text-decoration:none;
  transition: all 150ms ease;
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  font-family: inherit;
}

.button:hover{
  background: var(--surface-hover);
  border-color: var(--line-strong);
  text-decoration:none;
  transform: translateY(-1px);
}

.button-primary{
  background: linear-gradient(135deg, rgba(73,198,229,0.15), rgba(47,111,237,0.12));
  border-color: rgba(73,198,229,0.3);
  box-shadow: 0 2px 8px rgba(73,198,229,0.1);
}

.button-primary:hover{
  background: linear-gradient(135deg, rgba(73,198,229,0.22), rgba(47,111,237,0.18));
  border-color: rgba(73,198,229,0.4);
  box-shadow: 0 4px 12px rgba(73,198,229,0.15);
  transform: translateY(-2px);
}

.button-secondary{
  background: transparent;
  border-color: var(--line);
}

.button-text{
  background: transparent;
  border: none;
  padding: 8px 0;
  color: var(--accent);
}

.button-text:hover{
  background: transparent;
  transform: none;
}

/* Sections */
.section{
  padding: var(--spacing-xl) 0;
}

.section-title{
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 var(--spacing-sm);
  color: var(--fg);
  text-align: center;
}

.section-subtitle{
  font-size: 1.125rem;
  color: var(--muted);
  margin: 0 0 var(--spacing-lg);
  text-align: center;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Paths Section */
.section-paths{
  background: var(--panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.paths-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.path-card{
  padding: var(--spacing-md);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  transition: all 150ms ease;
}

.path-card:hover{
  border-color: var(--line-strong);
  background: var(--surface-hover);
  transform: translateY(-2px);
}

.path-card h3{
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 var(--spacing-xs);
  color: var(--fg);
}

.path-card p{
  color: var(--muted);
  margin: 0 0 var(--spacing-sm);
  font-size: 0.95rem;
  line-height: 1.6;
}

.path-link{
  color: var(--accent);
  font-weight: 500;
  font-size: 0.9rem;
}

.path-link:hover{
  text-decoration: underline;
}

/* What Section */
.what-content{
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.what-description{
  font-size: 1.125rem;
  color: var(--muted);
  margin: 0 0 var(--spacing-lg);
  line-height: 1.7;
}

.what-features{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  text-align: left;
}

.feature-item{
  padding: var(--spacing-md);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.feature-item strong{
  display: block;
  color: var(--fg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  font-size: 1rem;
}

.feature-item span{
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Products Section */
.section-products{
  background: var(--panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.products-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.product-card{
  padding: var(--spacing-md);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  position: relative;
  transition: all 150ms ease;
  display: flex;
  flex-direction: column;
}

.product-card:hover{
  border-color: var(--line-strong);
  background: var(--surface-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.product-card-featured{
  border-color: rgba(73,198,229,0.25);
  background: linear-gradient(135deg, rgba(73,198,229,0.08), rgba(47,111,237,0.05));
}

.product-badge{
  display: inline-block;
  padding: 4px 10px;
  background: rgba(73,198,229,0.15);
  border: 1px solid rgba(73,198,229,0.3);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.product-card h3{
  font-size: 1.375rem;
  font-weight: 600;
  margin: 0 0 var(--spacing-xs);
  color: var(--fg);
  letter-spacing: -0.01em;
}

.product-for{
  font-size: 0.875rem;
  color: var(--muted-2);
  margin: 0 0 var(--spacing-xs);
  font-weight: 500;
}

.product-outcome{
  color: var(--muted);
  margin: 0 0 var(--spacing-md);
  font-size: 0.95rem;
  line-height: 1.6;
  flex-grow: 1;
}

.product-value{
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 var(--spacing-md);
}

.product-actions{
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: var(--spacing-sm);
  border-top: 1px solid var(--line);
}

.products-cta{
  text-align: center;
  margin-top: var(--spacing-lg);
}

/* Workflows Section */
.workflows-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.workflow-group{
  padding: var(--spacing-md);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.workflow-group h3{
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 var(--spacing-xs);
  color: var(--fg);
}

.workflow-group > p{
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0 0 var(--spacing-sm);
  line-height: 1.6;
}

.workflow-group ul{
  margin: var(--spacing-sm) 0 0;
  padding-left: var(--spacing-md);
  list-style: none;
}

.workflow-group li{
  margin: var(--spacing-xs) 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.workflow-group a{
  color: var(--accent);
}

/* Trust Section */
.section-trust{
  background: var(--panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.trust-content{
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.trust-description{
  font-size: 1.125rem;
  color: var(--muted);
  margin: 0 0 var(--spacing-lg);
  line-height: 1.7;
}

.trust-points{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  text-align: left;
}

.trust-point{
  padding: var(--spacing-md);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.trust-point strong{
  display: block;
  color: var(--fg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  font-size: 1rem;
}

.trust-point p{
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
}

/* Footer */
.site-footer{
  border-top: 1px solid var(--line);
  padding: var(--spacing-lg) 0;
  color: var(--muted-2);
  font-size: 0.9rem;
}

.footer-inner{
  display:flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  align-items:center;
  justify-content:space-between;
}

.small{
  font-size: 0.875rem;
  color: var(--muted-2);
}

.privacy-notice{
  margin-top: var(--spacing-sm);
  opacity: 0.7;
}

/* Legacy styles for existing pages (products.html, etc.) */
main{padding: var(--spacing-md) 0 var(--spacing-lg);}

.hero{
  padding: var(--spacing-md) 0;
}

.hero-grid{
  display:grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  align-items: start;
}

@media (min-width: 860px){
  .hero-grid{grid-template-columns: 1.2fr 0.8fr; gap: var(--spacing-lg);}
}

.h-eyebrow{
  color: var(--muted-2);
  font-weight: 600;
  letter-spacing: 0.2px;
  text-transform: uppercase;
  font-size: 0.82rem;
}

h1{
  margin: 10px 0;
  font-size: clamp(2.0rem, 2.4vw + 1.2rem, 3.0rem);
  letter-spacing: -0.2px;
  line-height: 1.15;
}

.lede{
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 70ch;
}

h2{
  font-size: 1.5rem;
  margin: 0 0 10px;
  font-weight: 600;
}

h3{
  font-size: 1.125rem;
  margin: 0 0 10px;
  font-weight: 600;
}

p{margin: 10px 0; color: var(--muted);}

.list{
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.list li{margin: 6px 0;}

.card{
  border: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(180deg, rgba(15,26,46,0.55), rgba(12,21,38,0.50));
  border-radius: var(--radius);
  padding: var(--spacing-md);
}

.card .meta{
  color: var(--muted-2);
  font-size: 0.92rem;
  margin-top: -2px;
}

.card .cta{
  margin-top: 12px;
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
}

.card.flagship {
  border-color: rgba(73,198,229,0.18);
  background: linear-gradient(180deg, rgba(15,26,46,0.75), rgba(12,21,38,0.65));
  box-shadow: 0 2px 12px rgba(73,198,229,0.08);
}

.hr{
  height: 1px;
  background: var(--line);
  margin: var(--spacing-md) 0;
}

.panel{
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.03));
  border-radius: var(--radius);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.panel h2, .panel h3{margin-top:0;}

.grid-2{
  display:grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
}
@media (min-width: 860px){
  .grid-2{grid-template-columns: 1fr 1fr; gap: var(--spacing-md);}
}

.grid-3{
  display:grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
}
@media (min-width: 860px){
  .grid-3{grid-template-columns: repeat(3, 1fr); gap: var(--spacing-md);}
}

.notice{
  border-left: 3px solid rgba(73,198,229,0.35);
  padding: 12px 16px;
  background: rgba(73,198,229,0.06);
  border-radius: var(--radius-sm);
  color: var(--muted);
}

.kicker{
  color: var(--muted-2);
  font-size: 0.95rem;
}

/* Product Navigation */
.product-nav{
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-sm);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  justify-content: center;
}

.product-nav a{
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 0.9rem;
  transition: all 120ms ease;
}

.product-nav a:hover{
  background: var(--surface-hover);
  color: var(--fg);
  text-decoration: none;
}

@media (max-width: 640px){
  .container{
    width: calc(100% - 32px);
  }
  
  .hero-section{
    padding: var(--spacing-lg) 0;
  }
  
  .section{
    padding: var(--spacing-lg) 0;
  }
  
  .products-grid{
    grid-template-columns: 1fr;
  }
  
  .paths-grid{
    grid-template-columns: 1fr;
  }
  
  .product-nav{
    flex-direction: column;
  }
  
  .product-nav a{
    text-align: center;
  }
}