@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700;800&family=Spline+Sans+Mono:wght@500;600&display=swap');

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --green:#0A2514;
  --lime:#86E11F;
  --bg:#0a0a0a;
  --card:#141414;
  --z4:#a1a1aa;
  --z5:#71717a;
  --bdr:rgba(10,37,20,.5);
}

html{scroll-behavior:smooth}
body{font-family:'Poppins',sans-serif;background:var(--bg);color:#fff;overflow-x:hidden;-webkit-font-smoothing:antialiased}
::selection{background:var(--lime);color:#000}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
button{cursor:pointer;border:none;font-family:inherit}
.mono{font-family:'Spline Sans Mono',monospace}

/* ── Navbar ── */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:1rem clamp(1rem,4vw,3rem);
  background:rgba(10,10,10,.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--bdr);
}
.navbar-logo img{height:2rem;object-fit:contain}
.navbar-links{display:flex;align-items:center;gap:clamp(1rem,2vw,2rem);font-size:clamp(.7rem,1vw,.875rem);font-weight:500}
.navbar-links a{color:var(--z4);transition:color .2s}
.navbar-links a:hover{color:#fff}
.navbar-links a.active{background:var(--lime);color:#000;padding:.375rem 1rem;border-radius:9999px}

/* Hamburger */
.nav-burger{display:none;background:none;padding:.5rem;position:relative;width:2rem;height:1.5rem;flex-direction:column;justify-content:space-between}
.nav-burger span{display:block;width:100%;height:2px;background:var(--lime);border-radius:2px;transition:transform .3s,opacity .3s}
.nav-burger.open span:nth-child(1){transform:translateY(.55rem) rotate(45deg)}
.nav-burger.open span:nth-child(2){opacity:0}
.nav-burger.open span:nth-child(3){transform:translateY(-.55rem) rotate(-45deg)}

/* Mobile nav */
.mobile-nav{display:none;position:fixed;top:0;left:0;right:0;bottom:0;z-index:99;background:rgba(10,10,10,.95);backdrop-filter:blur(16px);flex-direction:column;align-items:center;justify-content:center;gap:1.5rem;opacity:0;pointer-events:none;transition:opacity .3s}
.mobile-nav.open{opacity:1;pointer-events:auto}
.mobile-nav a{color:#fff;font-size:1.25rem;font-weight:600;letter-spacing:.05em;transition:color .2s}
.mobile-nav a:hover{color:var(--lime)}

/* ── Hero / Page Header ── */
.page-hero{
  padding:8rem clamp(1rem,4vw,3rem) 4rem;
  text-align:center;
  position:relative;
}
.page-hero::before{
  content:'';position:absolute;top:0;left:0;right:0;bottom:0;
  background:radial-gradient(ellipse at 50% 0%,rgba(134,225,31,.06),transparent 60%);
  pointer-events:none;
}
.page-hero .badge{
  font-family:'Spline Sans Mono',monospace;font-size:.75rem;letter-spacing:.15em;
  text-transform:uppercase;color:var(--lime);margin-bottom:1rem;display:block;
}
.page-hero h1{font-size:clamp(1.8rem,4vw,3rem);font-weight:800;line-height:1.2;margin-bottom:1rem}
.page-hero p{color:var(--z4);font-size:clamp(.9rem,1.2vw,1.1rem);max-width:600px;margin:0 auto;line-height:1.6}

/* ── Bento Grid ── */
.bento{
  max-width:1100px;margin:0 auto;padding:0 clamp(1rem,4vw,3rem) 4rem;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1.5rem;
}
.bento-card{
  background:var(--card);border:1px solid var(--bdr);border-radius:1rem;
  padding:2rem;position:relative;overflow:hidden;
  transition:border-color .3s,transform .3s;
  display:flex;flex-direction:column;
}
.bento-card:hover{border-color:var(--lime);transform:translateY(-4px)}
.bento-card .card-icon{font-size:2.5rem;margin-bottom:1rem}
.bento-card .card-badge{
  font-family:'Spline Sans Mono',monospace;font-size:.65rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--lime);margin-bottom:.5rem;
}
.bento-card h3{font-size:1.25rem;font-weight:700;margin-bottom:.75rem}
.bento-card p{color:var(--z4);font-size:.875rem;line-height:1.6;flex:1}
.bento-card .card-link{
  display:inline-flex;align-items:center;gap:.5rem;
  margin-top:1.5rem;color:var(--lime);font-weight:600;font-size:.875rem;
  transition:gap .2s;
}
.bento-card:hover .card-link{gap:.75rem}
.bento-card.span-2{grid-column:span 2}
.bento-card.featured{border-color:rgba(134,225,31,.3);background:linear-gradient(135deg,var(--card),#0A2514 120%)}

/* ── Module Content ── */
.module{max-width:800px;margin:0 auto;padding:0 clamp(1rem,4vw,2rem) 4rem}
.module section{margin-bottom:3rem}
.module h2{font-size:clamp(1.3rem,2.5vw,1.8rem);font-weight:700;margin-bottom:1rem;color:#fff}
.module h2 .accent{color:var(--lime)}
.module h3{font-size:1.1rem;font-weight:600;margin-bottom:.75rem;color:#fff}
.module p,.module li{color:var(--z4);font-size:.95rem;line-height:1.7;margin-bottom:.75rem}
.module ul,.module ol{padding-left:1.5rem;margin-bottom:1rem}
.module li{margin-bottom:.5rem}
.module strong{color:#fff}

/* Info boxes */
.info-box{
  background:var(--card);border:1px solid var(--bdr);border-radius:.75rem;
  padding:1.5rem;margin:1.5rem 0;
}
.info-box.warning{border-color:rgba(251,146,60,.3);background:linear-gradient(135deg,var(--card),rgba(124,45,18,.15))}
.info-box.tip{border-color:rgba(134,225,31,.3);background:linear-gradient(135deg,var(--card),rgba(10,37,20,.4))}
.info-box .box-label{
  font-family:'Spline Sans Mono',monospace;font-size:.7rem;letter-spacing:.1em;
  text-transform:uppercase;margin-bottom:.5rem;display:block;
}
.info-box.warning .box-label{color:#fb923c}
.info-box.tip .box-label{color:var(--lime)}
.info-box p:last-child{margin-bottom:0}

/* Code/prompt blocks */
.prompt-block{
  background:#0e0e0e;border:1px solid var(--bdr);border-radius:.75rem;
  padding:1.25rem 1.5rem;margin:1.25rem 0;
  font-family:'Spline Sans Mono',monospace;font-size:.85rem;
  color:var(--z4);line-height:1.7;white-space:pre-wrap;
}
.prompt-block .label{color:var(--lime);font-weight:600;display:block;margin-bottom:.5rem;font-size:.7rem;letter-spacing:.1em;text-transform:uppercase}

/* Framework grid */
.framework-grid{
  display:grid;grid-template-columns:repeat(5,1fr);gap:.75rem;margin:1.5rem 0;
}
.framework-card{
  background:var(--card);border:1px solid var(--bdr);border-radius:.75rem;
  padding:1rem;text-align:center;
}
.framework-card .letter{
  font-size:1.5rem;font-weight:800;color:var(--lime);display:block;margin-bottom:.25rem;
}
.framework-card .label{font-size:.7rem;font-weight:600;color:#fff;text-transform:uppercase;letter-spacing:.05em;display:block;margin-bottom:.5rem}
.framework-card p{font-size:.75rem;color:var(--z4);line-height:1.4;margin:0}

/* Comparison grid */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:1.5rem 0}
.compare-col{background:var(--card);border:1px solid var(--bdr);border-radius:.75rem;padding:1.25rem}
.compare-col h4{font-size:.85rem;font-weight:700;margin-bottom:.75rem;display:flex;align-items:center;gap:.5rem}
.compare-col.do h4{color:#86E11F}
.compare-col.dont h4{color:#ef4444}
.compare-col li{font-size:.85rem;color:var(--z4);margin-bottom:.5rem}

/* Glossary */
.glossary-grid{display:grid;gap:1rem}
.glossary-item{
  background:var(--card);border:1px solid var(--bdr);border-radius:.75rem;
  padding:1.5rem;transition:border-color .2s;
}
.glossary-item:hover{border-color:rgba(134,225,31,.2)}
.glossary-item .term{font-size:1.1rem;font-weight:700;color:var(--lime);margin-bottom:.5rem}
.glossary-item .term-en{font-family:'Spline Sans Mono',monospace;font-size:.75rem;color:var(--z5);margin-left:.5rem}
.glossary-item p{color:var(--z4);font-size:.9rem;line-height:1.6;margin:0}

/* Navigation between modules */
.module-nav{
  display:flex;justify-content:space-between;align-items:center;
  padding:2rem 0;margin-top:2rem;border-top:1px solid var(--bdr);
}
.module-nav a{
  display:inline-flex;align-items:center;gap:.5rem;
  color:var(--lime);font-weight:600;font-size:.9rem;transition:gap .2s;
}
.module-nav a:hover{gap:.75rem}
.module-nav .prev::before{content:'<';font-family:'Spline Sans Mono',monospace}
.module-nav .next::after{content:'>';font-family:'Spline Sans Mono',monospace}

/* ── Footer ── */
.footer{
  border-top:1px solid var(--bdr);padding:2rem clamp(1rem,4vw,3rem);
  display:flex;justify-content:space-between;align-items:center;
  font-size:.75rem;color:var(--z5);
}
.footer a{color:var(--z4);transition:color .2s}
.footer a:hover{color:var(--lime)}

/* ── Quiz ── */
.quiz{margin:2rem 0}
.quiz-question{font-weight:600;margin-bottom:1rem;color:#fff}
.quiz-options{display:flex;flex-direction:column;gap:.5rem}
.quiz-opt{
  background:var(--card);border:1px solid var(--bdr);border-radius:.5rem;
  padding:.75rem 1rem;cursor:pointer;transition:all .2s;
  font-size:.9rem;color:var(--z4);text-align:left;
}
.quiz-opt:hover{border-color:var(--lime);color:#fff}
.quiz-opt.correct{border-color:#86E11F;background:rgba(134,225,31,.1);color:#86E11F}
.quiz-opt.wrong{border-color:#ef4444;background:rgba(239,68,68,.1);color:#ef4444}
.quiz-opt.disabled{pointer-events:none}
.quiz-feedback{margin-top:.75rem;font-size:.85rem;padding:.75rem 1rem;border-radius:.5rem;display:none}
.quiz-feedback.show{display:block}
.quiz-feedback.correct{background:rgba(134,225,31,.1);color:#86E11F;border:1px solid rgba(134,225,31,.3)}
.quiz-feedback.wrong{background:rgba(239,68,68,.1);color:#ef4444;border:1px solid rgba(239,68,68,.3)}

/* ── Progress bar ── */
.progress-bar{
  position:fixed;top:0;left:0;height:3px;background:var(--lime);
  z-index:200;transition:width .3s;
}

/* ── Responsive ── */
@media(max-width:768px){
  .bento{grid-template-columns:1fr}
  .bento-card.span-2{grid-column:span 1}
  .framework-grid{grid-template-columns:repeat(2,1fr)}
  .framework-grid .framework-card:last-child{grid-column:span 2}
  .compare{grid-template-columns:1fr}
  .navbar-links{display:none}
  .nav-burger{display:flex}
  .mobile-nav{display:flex}
  .footer{flex-direction:column;gap:1rem;text-align:center}
}