:root{
    /* ---- Material 3 derived token system, seeded from the UpskillAide mark ---- */
    --md-primary:#FF4701;
    --md-primary-hover:#E8400A;
    --md-on-primary:#1A0800;
    --md-primary-container:#FFE3D3;
    --md-on-primary-container:#4A1600;

    --md-surface:#12191F;
    --md-surface-dim:#0C1116;
    --md-surface-container:#1A2530;
    --md-surface-container-high:#212E3A;
    --md-on-surface:#EDEFF2;
    --md-on-surface-variant:#A9B3BE;

    --md-surface-light:#EEF1F5;
    --md-surface-light-2:#FFFFFF;
    --md-on-surface-light:#141B22;
    --md-on-surface-light-variant:#4C5763;

    --md-outline:rgba(237,239,242,0.14);
    --md-outline-light:rgba(20,27,34,0.12);

    --radius-s:10px;
    --radius-m:16px;
    --radius-l:24px;
    --radius-xl:32px;

    --elev-1:0 1px 3px rgba(0,0,0,.28), 0 1px 2px rgba(0,0,0,.22);
    --elev-2:0 4px 10px rgba(0,0,0,.30), 0 2px 4px rgba(0,0,0,.22);
    --elev-3:0 10px 24px rgba(0,0,0,.34), 0 4px 8px rgba(0,0,0,.24);

    --font-display:'Space Grotesk', 'Roboto', sans-serif;
    --font-body:'Roboto', sans-serif;
    --font-mono:'Roboto Mono', monospace;

    --container:1180px;
  }

  *{box-sizing:border-box; margin:0; padding:0;}
  html{scroll-behavior:smooth;}
  body{
    font-family:var(--font-body);
    background:var(--md-surface-light);
    color:var(--md-on-surface-light);
    line-height:1.5;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%; display:block;}
  a{color:inherit;}
  ul{list-style:none;}

  .wrap{max-width:var(--container); margin:0 auto; padding:0 32px;}
  @media (max-width:640px){ .wrap{padding:0 20px;} }

  h1,h2,h3{font-family:var(--font-display); font-weight:600; letter-spacing:-0.01em;}

  .eyebrow{
    display:inline-flex; align-items:center; gap:10px;
    font-family:var(--font-mono); font-size:13px; letter-spacing:0.08em; text-transform:uppercase;
    color:var(--md-primary); font-weight:500; margin-bottom:18px;
  }
  .eyebrow::before{
    content:""; display:block; width:6px; height:20px; border-radius:0 0 6px 6px;
    background:var(--md-primary); flex-shrink:0;
  }

  /* ---------- Buttons (M3 filled / tonal / outlined) ---------- */
  .btn{
    display:inline-flex; align-items:center; gap:8px;
    font-family:var(--font-body); font-weight:500; font-size:15px;
    padding:13px 22px; border-radius:100px; border:1px solid transparent;
    cursor:pointer; transition:box-shadow .2s ease, background .2s ease, transform .15s ease;
    text-decoration:none; white-space:nowrap;
  }
  .btn:active{transform:scale(0.97);}
  .btn-filled{background:var(--md-primary); color:var(--md-on-primary); box-shadow:var(--elev-1);}
  .btn-filled:hover{background:var(--md-primary-hover); box-shadow:var(--elev-2);}
  .btn-tonal{background:var(--md-surface-container-high); color:var(--md-on-surface);}
  .btn-tonal:hover{background:#2A3947;}
  .btn-outlined{background:transparent; border-color:var(--md-outline-light); color:var(--md-on-surface-light);}
  .btn-outlined:hover{background:rgba(20,27,34,0.05);}
  .btn-outlined.on-dark{border-color:var(--md-outline); color:var(--md-on-surface);}
  .btn-outlined.on-dark:hover{background:rgba(237,239,242,0.06);}
  .btn svg{width:16px; height:16px; flex-shrink:0;}

  /* ---------- Nav ---------- */
  header{
    position:sticky; top:0; z-index:100;
    background:rgba(18,25,31,0.72); backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid rgba(237,239,242,0.08);
  }
  nav.wrap{display:flex; align-items:center; justify-content:space-between; height:76px;}
  .brand{display:flex; align-items:center; gap:11px; font-family:var(--font-display); font-weight:700; font-size:19px; color:var(--md-on-surface);}
  .brand img{width:32px; height:32px; border-radius:8px;}
  .nav-links{display:flex; align-items:center; gap:36px;}
  .nav-links a{font-size:14.5px; color:var(--md-on-surface-variant); text-decoration:none; font-weight:500; transition:color .15s;}
  .nav-links a:hover{color:var(--md-on-surface);}
  .nav-cta{display:flex; align-items:center; gap:14px;}
  .nav-toggle{display:none; background:none; border:none; color:var(--md-on-surface); cursor:pointer;}
  @media (max-width:860px){
    .nav-links{display:none;}
    .nav-toggle{display:block;}
  }

  /* ---------- Hero ---------- */
  .hero{
    position:relative; overflow:hidden;
    background:radial-gradient(120% 140% at 15% 0%, #1B2732 0%, var(--md-surface) 45%, var(--md-surface-dim) 100%);
    color:var(--md-on-surface);
    padding:96px 0 120px;
  }
  .hero-arrows{position:absolute; inset:0; pointer-events:none; opacity:0.55;}
  .hero-arrows svg{position:absolute;}
  .hero-inner{position:relative; z-index:2; max-width:760px;}
  .hero h1{
    font-size:clamp(38px, 6vw, 68px); line-height:1.05; color:#fff; margin-bottom:26px;
  }
  .hero h1 em{font-style:normal; color:var(--md-primary);}
  .hero p.lede{
    font-size:clamp(17px, 2vw, 20px); color:var(--md-on-surface-variant); max-width:560px; margin-bottom:40px;
  }
  .hero-ctas{display:flex; gap:14px; flex-wrap:wrap; margin-bottom:64px;}
  .hero-tape{
    display:flex; gap:28px; flex-wrap:wrap; align-items:center;
    padding-top:28px; border-top:1px solid var(--md-outline);
    font-family:var(--font-mono); font-size:12.5px; color:var(--md-on-surface-variant); letter-spacing:0.02em;
  }
  .hero-tape span{display:flex; align-items:center; gap:8px;}
  .hero-tape .dot{width:6px; height:6px; border-radius:50%; background:var(--md-primary); flex-shrink:0;}

  /* ---------- Sections generic ---------- */
  section{padding:104px 0;}
  @media (max-width:640px){ section{padding:72px 0;} }
  .section-head{max-width:640px; margin-bottom:56px;}
  .section-head h2{font-size:clamp(28px, 3.6vw, 42px); line-height:1.12; margin-bottom:16px;}
  .section-head p{font-size:17px; color:var(--md-on-surface-light-variant);}

  section.dark{background:var(--md-surface); color:var(--md-on-surface);}
  section.dark .section-head p{color:var(--md-on-surface-variant);}

  /* ---------- Philosophy ---------- */
  .compare-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--md-outline-light); border-radius:var(--radius-l); overflow:hidden; border:1px solid var(--md-outline-light);}
  .compare-card{background:var(--md-surface-light-2); padding:36px 30px;}
  .compare-card.active{background:var(--md-on-surface-light); color:#fff;}
  .compare-card .tag{font-family:var(--font-mono); font-size:12px; text-transform:uppercase; letter-spacing:.08em; color:var(--md-on-surface-light-variant); margin-bottom:18px; display:block;}
  .compare-card.active .tag{color:var(--md-primary);}
  .compare-card h3{font-size:21px; margin-bottom:12px; font-weight:600;}
  .compare-card p{font-size:14.5px; color:var(--md-on-surface-light-variant); line-height:1.6;}
  .compare-card.active p{color:rgba(255,255,255,0.72);}
  @media (max-width:820px){ .compare-grid{grid-template-columns:1fr;} }

  /* ---------- Focus areas ---------- */
  .focus-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:20px;}
  @media (max-width:900px){ .focus-grid{grid-template-columns:repeat(2,1fr);} }
  @media (max-width:600px){ .focus-grid{grid-template-columns:1fr;} }
  .focus-card{
    background:var(--md-surface-container); border:1px solid var(--md-outline);
    border-radius:var(--radius-m); padding:28px; transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  }
  .focus-card:hover{transform:translateY(-4px); box-shadow:var(--elev-3); border-color:rgba(255,71,1,0.4);}
  .focus-card .ic{
    width:42px; height:42px; border-radius:12px; background:var(--md-primary-container);
    display:flex; align-items:center; justify-content:center; margin-bottom:20px;
  }
  .focus-card .ic svg{width:22px; height:22px; color:var(--md-primary-container); stroke:var(--md-on-primary-container);}
  .focus-card h3{font-size:18px; margin-bottom:8px; color:var(--md-on-surface); font-weight:600;}
  .focus-card p{font-size:14px; color:var(--md-on-surface-variant); line-height:1.55;}

  /* ---------- How it works ---------- */
  .steps{display:grid; grid-template-columns:repeat(4,1fr); gap:0; counter-reset:step;}
  @media (max-width:900px){ .steps{grid-template-columns:repeat(2,1fr); gap:32px;} }
  @media (max-width:560px){ .steps{grid-template-columns:1fr;} }
  .step{position:relative; padding:0 24px 0 0;}
  .step:not(:last-child){border-right:1px solid var(--md-outline-light);}
  @media (max-width:900px){ .step:not(:last-child){border-right:none;} }
  .step .num{
    font-family:var(--font-display); font-size:15px; font-weight:700; color:var(--md-primary);
    width:34px; height:34px; border:1.5px solid var(--md-primary); border-radius:10px;
    display:flex; align-items:center; justify-content:center; margin-bottom:20px;
  }
  .step h3{font-size:17.5px; margin-bottom:10px; font-weight:600;}
  .step p{font-size:14.5px; color:var(--md-on-surface-light-variant); line-height:1.6;}

  /* ---------- Community ---------- */
  .community{display:grid; grid-template-columns:1.1fr 0.9fr; gap:64px; align-items:center;}
  @media (max-width:900px){ .community{grid-template-columns:1fr; gap:40px;} }
  .community-points{display:flex; flex-direction:column; gap:22px; margin-top:32px;}
  .point{display:flex; gap:16px;}
  .point .bar{width:5px; border-radius:0 0 5px 5px; background:var(--md-primary); flex-shrink:0;}
  .point h4{font-size:15.5px; margin-bottom:5px; font-weight:600; color:var(--md-on-surface);}
  .point p{font-size:14px; color:var(--md-on-surface-variant); line-height:1.55;}
  .community-panel{
    background:var(--md-surface-container); border:1px solid var(--md-outline);
    border-radius:var(--radius-l); padding:36px; box-shadow:var(--elev-2);
  }
  .community-panel .log{
    font-family:var(--font-mono); font-size:12.5px; color:var(--md-on-surface-variant);
    background:var(--md-surface-dim); border-radius:var(--radius-s); padding:16px; line-height:1.8;
    border:1px solid var(--md-outline);
  }
  .community-panel .log .k{color:var(--md-primary);}
  .community-panel h3{font-size:18px; margin:20px 0 8px; font-weight:600; color:var(--md-on-surface);}
  .community-panel p{font-size:13.5px; color:var(--md-on-surface-variant);}

  /* ---------- Join ---------- */
  .join{
    background:linear-gradient(135deg, var(--md-surface-dim) 0%, var(--md-surface) 60%, #24170F 140%);
    color:var(--md-on-surface); text-align:center; position:relative; overflow:hidden;
  }
  .join .wrap{position:relative; z-index:2; max-width:600px;}
  .join h2{font-size:clamp(28px,4vw,44px); margin-bottom:16px;}
  .join p{color:var(--md-on-surface-variant); font-size:16.5px; margin-bottom:36px;}
  .join-form{display:flex; gap:10px; max-width:440px; margin:0 auto; flex-wrap:wrap; justify-content:center;}
  .join-form input[type=email]{
    flex:1; min-width:220px; padding:14px 18px; border-radius:100px; border:1px solid var(--md-outline);
    background:var(--md-surface-container); color:var(--md-on-surface); font-size:15px; font-family:var(--font-body);
  }
  .join-form input[type=email]:focus{outline:2px solid var(--md-primary); outline-offset:2px;}
  .join-note{font-size:12.5px; color:var(--md-on-surface-variant); margin-top:16px; opacity:0.75;}
  .form-msg{margin-top:16px; font-size:14px; color:var(--md-primary); font-weight:500; min-height:20px;}

  /* ---------- Footer ---------- */
  footer{background:var(--md-surface-dim); color:var(--md-on-surface-variant); padding:56px 0 32px;}
  .footer-top{display:flex; justify-content:space-between; align-items:flex-start; gap:32px; flex-wrap:wrap; padding-bottom:36px; border-bottom:1px solid var(--md-outline);}
  .footer-brand{display:flex; align-items:center; gap:11px; font-family:var(--font-display); font-weight:700; font-size:18px; color:var(--md-on-surface);}
  .footer-brand img{width:28px; height:28px; border-radius:7px;}
  .footer-links{display:flex; gap:44px; flex-wrap:wrap;}
  .footer-links h5{font-size:12px; text-transform:uppercase; letter-spacing:.06em; color:var(--md-on-surface-variant); margin-bottom:14px; font-family:var(--font-mono); font-weight:500;}
  .footer-links a{display:block; font-size:14px; color:var(--md-on-surface); text-decoration:none; margin-bottom:10px; opacity:0.85;}
  .footer-links a:hover{opacity:1; color:var(--md-primary);}
  .footer-bottom{display:flex; justify-content:space-between; padding-top:24px; font-size:13px; flex-wrap:wrap; gap:12px;}

  /* ---------- reveal-on-scroll ---------- */
  .reveal{opacity:0; transform:translateY(18px); transition:opacity .6s ease, transform .6s ease;}
  .reveal.in{opacity:1; transform:none;}
  @media (prefers-reduced-motion: reduce){
    .reveal{opacity:1; transform:none; transition:none;}
    html{scroll-behavior:auto;}
  }

  .sr-only{position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0,0,0,0);}