/* =========================
   GammaLearn — Design System
   ========================= */

:root{
  --bg-main:#07111f;
  --bg-elevated:#0f1d33;
  --bg-panel:rgba(15,29,51,0.82);
  --bg-panel-strong:#132645;
  --text-main:#f3f7fb;
  --text-muted:#9da9ba;
  --text-soft:#cfd8e3;
  --border-soft:rgba(157,169,186,0.2);
  --border-strong:rgba(157,169,186,0.32);
  --accent:#58a6ff;
  --accent-strong:#2f7cf4;
  --accent-soft:rgba(88,166,255,0.16);
  --success:#7be0b0;
  --shadow-lg:0 30px 80px rgba(2,8,20,0.45);
  --shadow-md:0 18px 48px rgba(2,8,20,0.32);
  --radius-lg:28px;
  --radius-md:20px;
  --radius-sm:14px;
  --content-width:1140px;
}

*,
*::before,
*::after{
  box-sizing:border-box;
}

html{
  scroll-behavior:smooth;
}

body{
  margin:0;
  min-width:320px;
  background:
    radial-gradient(circle at top, rgba(88,166,255,0.18), transparent 28%),
    linear-gradient(180deg, #08111f 0%, #07111f 45%, #0a1830 100%);
  color:var(--text-main);
  font-family:"Source Serif 4", Georgia, "Times New Roman", serif;
  line-height:1.65;
}

img{
  max-width:100%;
  display:block;
}

a{
  color:inherit;
}

button,
input,
select,
textarea{
  font:inherit;
}

:focus-visible{
  outline:3px solid rgba(88,166,255,0.5);
  outline-offset:3px;
}

.skip-link{
  position:absolute;
  left:16px;
  top:-48px;
  z-index:100;
  padding:10px 14px;
  border-radius:12px;
  background:#ffffff;
  color:#08111f;
  text-decoration:none;
  font-family:"Manrope", system-ui, sans-serif;
  font-weight:700;
}

.skip-link:focus{
  top:16px;
}

.container{
  width:min(var(--content-width), calc(100% - 40px));
  margin:0 auto;
}

.section{
  padding:88px 0;
}

.section-head{
  max-width:760px;
  margin:0 auto 28px;
  text-align:center;
}

.section-head h2{
  margin:0 0 12px;
  font-family:"Playfair Display", Georgia, serif;
  font-size:clamp(2rem, 4vw, 3rem);
  line-height:1.1;
}

.section-head p{
  margin:0;
  color:var(--text-muted);
  font-family:"Manrope", system-ui, sans-serif;
}

.eyebrow{
  margin:0 0 16px;
  color:var(--success);
  font-family:"Manrope", system-ui, sans-serif;
  font-size:0.78rem;
  font-weight:700;
  letter-spacing:0.18em;
  text-transform:uppercase;
}

.lead{
  color:var(--text-muted);
  font-family:"Manrope", system-ui, sans-serif;
  font-size:1.05rem;
}

.panel{
  background:var(--bg-panel);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-md);
  backdrop-filter:blur(14px);
}

.accent{
  color:#ffffff;
  position:relative;
}

.accent::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0.1em;
  height:0.3em;
  border-radius:999px;
  background:var(--accent-soft);
  z-index:-1;
}

.top-nav{
  position:sticky;
  top:0;
  z-index:40;
  background:rgba(7,17,31,0.78);
  border-bottom:1px solid rgba(157,169,186,0.08);
  backdrop-filter:blur(14px);
}

.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:82px;
}

.nav-brand{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
}

.nav-brand img{
  width:42px;
  height:42px;
}

.brand-mark{
  display:flex;
  flex-direction:column;
  gap:2px;
}

.brand-name{
  font-family:"Playfair Display", Georgia, serif;
  font-size:1.25rem;
  font-weight:600;
  letter-spacing:0.03em;
}

.brand-tagline{
  color:var(--text-muted);
  font-family:"Manrope", system-ui, sans-serif;
  font-size:0.78rem;
}

.menu{
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:wrap;
}

.menu a{
  padding:10px 14px;
  border-radius:999px;
  color:var(--text-muted);
  text-decoration:none;
  font-family:"Manrope", system-ui, sans-serif;
  font-size:0.95rem;
  transition:0.2s ease;
}

.menu a:hover,
.menu a[aria-current="page"]{
  color:var(--text-main);
  background:rgba(255,255,255,0.06);
}

.nav-cta{
  white-space:nowrap;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:52px;
  padding:0 24px;
  border:none;
  border-radius:999px;
  text-decoration:none;
  font-family:"Manrope", system-ui, sans-serif;
  font-weight:700;
  transition:transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.btn:hover{
  transform:translateY(-1px);
}

.btn.primary{
  color:#ffffff;
  background:linear-gradient(135deg, var(--accent), var(--accent-strong));
  box-shadow:0 16px 36px rgba(47,124,244,0.35);
}

.btn.secondary{
  color:var(--text-main);
  background:rgba(255,255,255,0.04);
  border:1px solid var(--border-soft);
}

.btn.secondary:hover{
  border-color:var(--border-strong);
  background:rgba(255,255,255,0.08);
}

.btn.full{
  width:100%;
}

.page-shell{
  padding:56px 0 96px;
}

.page-hero{
  padding:36px 0 10px;
}

.page-hero-copy{
  max-width:780px;
}

.page-hero h1{
  margin:0 0 18px;
  font-family:"Playfair Display", Georgia, serif;
  font-size:clamp(2.8rem, 6vw, 4.8rem);
  line-height:0.98;
  letter-spacing:-0.03em;
}

.page-hero p{
  margin:0;
}

.hero-manifesto{
  padding:48px 0 112px;
}

.home-stage{
  padding:72px 0 96px;
}

.home-minimal{
  max-width:860px;
  margin:0 auto;
  padding:56px 48px;
  text-align:center;
}

.home-minimal .hero-logo{
  margin:0 auto 24px;
}

.home-minimal h1{
  margin:0 0 20px;
  font-family:"Playfair Display", Georgia, serif;
  font-size:clamp(3rem, 8vw, 5.2rem);
  line-height:0.98;
  letter-spacing:-0.04em;
}

.home-minimal .slogan{
  margin:0 auto 28px;
  max-width:640px;
}

.home-minimal .hero-actions{
  justify-content:center;
  margin-bottom:16px;
}

.home-note{
  margin:0;
  color:var(--text-muted);
  font-family:"Manrope", system-ui, sans-serif;
  font-size:0.95rem;
}

.home-overview{
  padding-top:28px;
}

.hero-layout{
  display:grid;
  grid-template-columns:minmax(0, 1.2fr) minmax(300px, 0.8fr);
  gap:32px;
  align-items:stretch;
}

.hero-card{
  padding:48px;
  position:relative;
  overflow:hidden;
}

.hero-card::before{
  content:"";
  position:absolute;
  inset:auto -10% -35% auto;
  width:340px;
  height:340px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(88,166,255,0.26), transparent 68%);
  pointer-events:none;
}

.hero-content{
  position:relative;
  z-index:1;
}

.hero-logo{
  width:84px;
  height:84px;
  margin-bottom:26px;
}

.hero-manifesto h1{
  margin:0 0 20px;
  font-family:"Playfair Display", Georgia, serif;
  font-size:clamp(3.6rem, 10vw, 6.5rem);
  line-height:0.95;
  letter-spacing:-0.05em;
}

.slogan{
  max-width:620px;
  margin:0 0 32px;
  color:var(--text-soft);
  font-family:"Manrope", system-ui, sans-serif;
  font-size:1.08rem;
}

.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:28px;
}

.hero-proof{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin:0;
  padding:0;
  list-style:none;
}

.hero-proof li{
  padding:10px 14px;
  border:1px solid rgba(255,255,255,0.08);
  border-radius:999px;
  color:var(--text-muted);
  background:rgba(255,255,255,0.03);
  font-family:"Manrope", system-ui, sans-serif;
  font-size:0.92rem;
}

.hero-side{
  display:grid;
  gap:18px;
}

.hero-metric{
  padding:28px;
}

.hero-metric strong{
  display:block;
  margin-bottom:6px;
  font-family:"Manrope", system-ui, sans-serif;
  font-size:2rem;
}

.hero-metric span{
  color:var(--text-muted);
  font-family:"Manrope", system-ui, sans-serif;
}

.split-grid{
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:18px;
}

.feature-card,
.info-card{
  padding:28px;
}

.feature-card h3,
.info-card h3{
  margin:0 0 12px;
  font-family:"Playfair Display", Georgia, serif;
  font-size:1.5rem;
}

.feature-card p,
.info-card p,
.info-card li{
  margin:0;
  color:var(--text-muted);
  font-family:"Manrope", system-ui, sans-serif;
}

.feature-card ul,
.info-card ul{
  margin:16px 0 0;
  padding-left:18px;
}

.feature-card li + li,
.info-card li + li{
  margin-top:10px;
}

.cta-band{
  padding:36px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}

.cta-band h2{
  margin:0 0 10px;
  font-family:"Playfair Display", Georgia, serif;
  font-size:2.1rem;
}

.cta-band p{
  margin:0;
  color:var(--text-muted);
  font-family:"Manrope", system-ui, sans-serif;
}

footer{
  border-top:1px solid rgba(157,169,186,0.12);
}

.footer-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:24px 0 40px;
  color:var(--text-muted);
  font-family:"Manrope", system-ui, sans-serif;
  font-size:0.92rem;
}

.footer-links{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
}

.footer-links a{
  text-decoration:none;
}

@media (max-width: 1080px){
  .nav{
    min-height:auto;
    padding:18px 0;
    flex-wrap:wrap;
  }

  .hero-layout{
    grid-template-columns:1fr;
  }

  .split-grid{
    grid-template-columns:1fr;
  }

  .cta-band{
    flex-direction:column;
    align-items:flex-start;
  }
}

@media (max-width: 720px){
  .container{
    width:min(var(--content-width), calc(100% - 24px));
  }

  .page-shell{
    padding:28px 0 72px;
  }

  .section{
    padding:64px 0;
  }

  .menu{
    width:100%;
  }

  .menu a{
    flex:1 1 auto;
    text-align:center;
    font-size:0.9rem;
  }

  .nav-cta{
    width:100%;
  }

  .nav-cta .btn{
    width:100%;
  }

  .hero-card,
  .feature-card,
  .info-card,
  .hero-metric,
  .cta-band{
    padding:24px;
  }

  .hero-actions{
    flex-direction:column;
    align-items:stretch;
  }

  .hero-actions .btn{
    width:100%;
  }

  .home-minimal{
    padding:40px 24px;
  }

  .footer-inner{
    flex-direction:column;
    align-items:flex-start;
    padding-bottom:28px;
  }
}