:root {
      --gold:#f0a500;--gold-light:#ffd77a;--gold-container:#3a2800;--gold-dim:rgba(240,165,0,0.1);
      --brand-blue:#002D80;--blue-container:#001a4d;--blue-text:#b3c6ff;
      --teal:#5dcaa5;--teal-container:#004d38;
      --surface-deep:#030406;--surface:#07090f;--container-low:#0a0d16;
      --container:#0d1120;--container-high:#131928;--container-top:#1a2133;
      --on-surface:#e8e6dd;--on-surface-var:#9e9c94;
      --outline:#4a4840;--outline-var:#2a2824;
    }
    *,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
    html{scroll-behavior:smooth;}
    body{background:var(--surface);color:var(--on-surface);font-family:'DM Sans',sans-serif;overflow-x:hidden;}
    ::-webkit-scrollbar{width:5px;}
    ::-webkit-scrollbar-track{background:var(--surface);}
    ::-webkit-scrollbar-thumb{background:var(--gold-container);border-radius:3px;}

    /* NAV */
    nav{position:fixed;top:0;left:0;right:0;z-index:200;height:66px;display:flex;align-items:center;
      justify-content:space-between;padding:0 56px;
      background:rgba(7,9,15,0.88);backdrop-filter:blur(18px);
      border-bottom:1px solid var(--outline-var);}
    .nav-logo{font-family:'Montserrat',sans-serif;font-weight:900;font-size:17px;
      color:var(--gold);text-decoration:none;display:flex;align-items:center;gap:10px;}
    .nav-logo-icon{width:30px;height:30px;background:var(--gold-container);border-radius:7px;
      display:flex;align-items:center;justify-content:center;font-size:15px;}
    .nav-links{display:flex;gap:4px;list-style:none;}
    .nav-links a{font-size:13px;font-weight:500;color:var(--on-surface-var);text-decoration:none;
      padding:8px 14px;border-radius:50px;transition:color .2s,background .2s;}
    .nav-links a:hover,.nav-links a.active{color:var(--gold);background:var(--gold-dim);}
    .nav-cta{background:var(--gold);color:#07090f;font-weight:500;font-size:13px;
      padding:9px 20px;border-radius:50px;text-decoration:none;transition:opacity .2s,transform .2s;}
    .nav-cta:hover{opacity:.88;transform:translateY(-1px);}
    .hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px;}
    .hamburger span{width:22px;height:2px;background:var(--on-surface);border-radius:2px;}
    .mobile-menu{display:none;position:fixed;inset:0;z-index:190;background:var(--container-low);
      flex-direction:column;align-items:center;justify-content:center;gap:24px;}
    .mobile-menu.open{display:flex;}
    .mobile-menu a{font-family:'Montserrat',sans-serif;font-weight:700;font-size:24px;
      color:var(--on-surface);text-decoration:none;transition:color .2s;}
    .mobile-menu a:hover{color:var(--gold);}
    .mobile-close{position:absolute;top:24px;right:24px;font-size:28px;color:var(--on-surface-var);
      cursor:pointer;background:none;border:none;line-height:1;}

    /* HERO */
    #home{min-height:100vh;display:grid;grid-template-columns:1fr 1fr;align-items:center;
      padding:100px 56px 80px;gap:60px;position:relative;overflow:hidden;}
    .hero-bg{position:absolute;inset:0;pointer-events:none;
      background:radial-gradient(ellipse 60% 80% at -10% 50%,rgba(240,165,0,.06) 0%,transparent 70%),
        radial-gradient(ellipse 40% 60% at 110% 30%,rgba(0,45,128,.07) 0%,transparent 70%);}
    .hero-grid{position:absolute;inset:0;pointer-events:none;opacity:.025;
      background-image:linear-gradient(var(--gold) 1px,transparent 1px),
        linear-gradient(90deg,var(--gold) 1px,transparent 1px);
      background-size:60px 60px;}
    .hero-content{position:relative;z-index:1;}
    .hero-eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--gold-container);
      color:var(--gold-light);font-size:11px;font-weight:500;letter-spacing:2px;text-transform:uppercase;
      padding:6px 14px;border-radius:4px;margin-bottom:28px;}
    .hero-dot{width:6px;height:6px;border-radius:50%;background:var(--gold);animation:blink 2s ease-in-out infinite;}
    @keyframes blink{0%,100%{opacity:1;}50%{opacity:.3;}}
    h1.ht{font-family:'Montserrat',sans-serif;font-weight:900;font-size:clamp(36px,4.5vw,60px);
      line-height:1.04;letter-spacing:-1.5px;color:var(--on-surface);margin-bottom:18px;}
    h1.ht .g{color:var(--gold);}
    .hero-sub{font-size:17px;color:var(--on-surface-var);line-height:1.65;max-width:460px;margin-bottom:38px;}
    .hero-btns{display:flex;gap:14px;flex-wrap:wrap;}
    .btn-gold{background:var(--gold);color:#07090f;font-weight:500;font-size:14px;
      padding:13px 28px;border-radius:50px;text-decoration:none;display:inline-flex;align-items:center;gap:8px;
      transition:opacity .2s,transform .2s;}
    .btn-gold:hover{opacity:.88;transform:translateY(-2px);}
    .btn-ghost{border:1.5px solid var(--outline);color:var(--on-surface-var);font-weight:500;font-size:14px;
      padding:13px 28px;border-radius:50px;text-decoration:none;display:inline-flex;align-items:center;gap:8px;
      transition:border-color .2s,color .2s,transform .2s;}
    .btn-ghost:hover{border-color:var(--gold);color:var(--gold);transform:translateY(-2px);}
    .hero-stats{display:flex;gap:32px;margin-top:44px;padding-top:32px;border-top:1px solid var(--outline-var);}
    .stat{display:flex;flex-direction:column;gap:3px;}
    .stat-n{font-family:'Montserrat',sans-serif;font-weight:900;font-size:28px;color:var(--gold);line-height:1;}
    .stat-l{font-size:11px;color:var(--on-surface-var);letter-spacing:.4px;}
    .hero-visual{display:flex;justify-content:center;align-items:center;position:relative;z-index:1;}
    .orb-wrap{position:relative;width:360px;height:360px;display:flex;align-items:center;justify-content:center;}
    .orb-svg{animation:breathe 4s ease-in-out infinite;}
    @keyframes breathe{0%,100%{transform:scale(1);}50%{transform:scale(1.04);}}
    .orb-label{position:absolute;font-family:'Montserrat',sans-serif;font-weight:900;font-size:12px;
      color:var(--gold);text-align:center;line-height:1.4;letter-spacing:1px;}

    /* SHARED SECTION */
    section{padding:88px 56px;position:relative;z-index:1;}
    .s-tag{font-size:11px;font-weight:500;letter-spacing:2px;text-transform:uppercase;color:var(--gold);margin-bottom:10px;}
    .s-title{font-family:'Montserrat',sans-serif;font-weight:900;font-size:clamp(26px,3vw,40px);
      color:var(--on-surface);line-height:1.1;margin-bottom:14px;letter-spacing:-.5px;}
    .s-desc{font-size:16px;color:var(--on-surface-var);line-height:1.7;max-width:580px;margin-bottom:44px;}
    .divider{height:1px;background:var(--outline-var);margin:0 56px;}

    /* BOOKS */
    #books{background:var(--surface-deep);}

    /* Workbook banner */
    .workbook-banner{
      display:flex;align-items:flex-start;gap:20px;
      background:linear-gradient(135deg,var(--gold-container),#1a0f00);
      border:1px solid rgba(240,165,0,.35);border-radius:16px;
      padding:28px 32px;margin-bottom:36px;
    }
    .wb-icon{font-size:36px;flex-shrink:0;margin-top:2px;}
    .wb-title{font-family:'Montserrat',sans-serif;font-weight:800;font-size:16px;
      color:var(--gold-light);margin-bottom:8px;}
    .wb-text{font-size:14px;color:var(--on-surface-var);line-height:1.75;}
    .wb-text strong{color:var(--gold-light);font-weight:500;}
    .wb-steps{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px;}
    .wb-step{display:flex;align-items:center;gap:7px;background:rgba(240,165,0,.1);
      border:1px solid rgba(240,165,0,.2);border-radius:50px;padding:5px 14px;}
    .wb-step-num{font-family:'Montserrat',sans-serif;font-weight:900;font-size:12px;color:var(--gold);}
    .wb-step-txt{font-size:12px;color:var(--on-surface-var);}

    /* Workbook badge on book cards */
    .wb-badge{display:inline-flex;align-items:center;gap:5px;
      background:var(--gold-container);border:1px solid rgba(240,165,0,.3);
      border-radius:4px;padding:3px 8px;
      font-size:10px;font-weight:500;letter-spacing:.8px;text-transform:uppercase;
      color:var(--gold-light);margin-bottom:2px;}

    .filter-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:36px;}
    .fbtn{font-size:12px;font-weight:500;letter-spacing:.5px;padding:7px 18px;border-radius:50px;
      border:1px solid var(--outline);background:transparent;color:var(--on-surface-var);
      cursor:pointer;transition:all .2s;}
    .fbtn:hover,.fbtn.active{border-color:var(--gold);color:var(--gold);background:var(--gold-dim);}
    .books-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(195px,1fr));gap:20px;}
    .book-card{background:var(--container);border:1px solid var(--outline-var);border-radius:14px;
      overflow:hidden;transition:transform .3s,border-color .3s,box-shadow .3s;cursor:pointer;
      display:flex;flex-direction:column;}
    .book-card:hover{transform:translateY(-6px);border-color:var(--gold);
      box-shadow:0 16px 48px rgba(0,0,0,.5),0 0 20px rgba(240,165,0,.07);}
    .bcover{aspect-ratio:3/4;display:flex;align-items:center;justify-content:center;
      padding:20px;text-align:center;font-family:'Montserrat',sans-serif;font-weight:800;
      font-size:13px;line-height:1.35;position:relative;overflow:hidden;}
    .bcover::before{content:attr(data-s);position:absolute;font-size:100px;opacity:.05;
      right:-20px;bottom:-20px;line-height:1;}
    .bc-txt{position:relative;z-index:1;}
    /* Book cover image wrapper with fallback */
    .book-img-wrap{
      width:100%; aspect-ratio:350px;
      position:relative; overflow:hidden; display:block; flex-shrink:0;
    }
    .book-img-wrap .fallback{
      position:absolute; inset:0; width:100%; height:100%;
      display:flex; align-items:center; justify-content:center;
      text-align:center; padding:20px;
      font-family:'Montserrat',sans-serif; font-weight:800;
      font-size:12px; line-height:1.35; color:var(--gold);
      background:linear-gradient(150deg,#1a0f00,#3a2800);
    }
    .book-img-wrap img{
      position:absolute; inset:0;
      width:100%; height:100%;
      object-fit:cover; object-position:center top;
      display:block; z-index:1;
    }
    .cv1{background:linear-gradient(150deg,#1a0f00,#3a2800);color:var(--gold);}
    .cv2{background:linear-gradient(150deg,#001230,#002D80);color:#b3c6ff;}
    .cv3{background:linear-gradient(150deg,#001a0e,#004d38);color:#5dcaa5;}
    .cv4{background:linear-gradient(150deg,#1a0020,#3d0050);color:#d4a5ff;}
    .cv5{background:linear-gradient(150deg,#1a0800,#3a1500);color:#ffb347;}
    .cv6{background:linear-gradient(150deg,#070a14,#131928);color:var(--gold);}
    .cv7{background:linear-gradient(150deg,#001010,#003030);color:#7fffdf;}
    .binfo{padding:16px;flex:1;display:flex;flex-direction:column;gap:5px;}
    .bcat{font-size:10px;font-weight:500;letter-spacing:1.5px;text-transform:uppercase;color:var(--gold);}
    .btitle{font-family:'Montserrat',sans-serif;font-weight:700;font-size:13px;color:var(--on-surface);line-height:1.35;flex:1;}
    .blang{font-size:10px;color:var(--on-surface-var);font-style:italic;}
    .blink{display:inline-flex;align-items:center;gap:4px;font-size:12px;font-weight:500;
      color:var(--gold);text-decoration:none;margin-top:10px;transition:gap .2s;}
    .blink:hover{gap:8px;}
    .books-cta{text-align:center;margin-top:44px;}

    /* ABOUT */
    #about{background:var(--surface);display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center;}
    .about-card{background:var(--container);border-radius:24px;border:1px solid var(--outline-var);
      padding:40px;position:relative;overflow:hidden;}
    .about-card::after{content:'';position:absolute;top:-80px;right:-80px;width:240px;height:240px;
      background:radial-gradient(circle,rgba(240,165,0,.07),transparent 70%);pointer-events:none;}
    .about-avatar{width:70px;height:70px;border-radius:50%;
      background:linear-gradient(135deg,var(--gold-container),var(--container-top));
      border:2px solid var(--gold);display:flex;align-items:center;justify-content:center;
      font-family:'Montserrat',sans-serif;font-weight:900;font-size:22px;color:var(--gold);margin-bottom:18px;}
    .about-name{font-family:'Montserrat',sans-serif;font-weight:900;font-size:22px;color:var(--on-surface);margin-bottom:4px;}
    .about-role{font-size:13px;color:var(--gold);font-weight:500;margin-bottom:18px;}
    .about-bio{font-size:14px;color:var(--on-surface-var);line-height:1.75;}
    .about-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:22px;}
    .astat{background:var(--container-high);border-radius:12px;padding:15px;border:1px solid var(--outline-var);}
    .astat-n{font-family:'Montserrat',sans-serif;font-weight:900;font-size:22px;color:var(--gold);line-height:1;margin-bottom:3px;}
    .astat-l{font-size:11px;color:var(--on-surface-var);}
    .about-right{display:flex;flex-direction:column;gap:20px;}
    .about-right .s-desc{margin-bottom:0;}
    .pills{display:flex;flex-wrap:wrap;gap:8px;}
    .pill{background:var(--container-high);border:1px solid var(--outline);border-radius:50px;
      padding:6px 14px;font-size:12px;color:var(--on-surface-var);}
    .about-quote{background:var(--gold-container);border-radius:14px;padding:22px 26px;border-left:3px solid var(--gold);}
    .about-quote p{font-style:italic;font-size:15px;color:var(--gold-light);line-height:1.65;}

    /* METHODOLOGY */
    #methodology{background:var(--container-low);border-top:1px solid var(--outline-var);border-bottom:1px solid var(--outline-var);}
    .method-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;}
    .mcard{background:var(--container);border:1px solid var(--outline-var);border-radius:16px;
      padding:26px 18px;text-align:center;transition:border-color .3s,transform .3s;}
    .mcard:hover{border-color:var(--gold);transform:translateY(-4px);}
    .micon{width:46px;height:46px;background:var(--gold-container);border-radius:12px;
      display:flex;align-items:center;justify-content:center;font-size:20px;margin:0 auto 14px;}
    .mtitle{font-family:'Montserrat',sans-serif;font-weight:700;font-size:12px;
      color:var(--gold-light);margin-bottom:7px;line-height:1.4;}
    .mdesc{font-size:12px;color:var(--on-surface-var);line-height:1.65;}

    /* APP */
    #app{background:var(--surface);display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center;}
    .app-mock{background:var(--container);border-radius:28px;border:1px solid var(--outline-var);
      padding:36px;text-align:center;position:relative;overflow:hidden;}
    .app-mock::before{content:'';position:absolute;bottom:-60px;left:50%;transform:translateX(-50%);
      width:200px;height:200px;background:radial-gradient(circle,rgba(240,165,0,.07),transparent 70%);}
    .app-icon{width:76px;height:76px;border-radius:20px;
      background:linear-gradient(135deg,var(--gold),#e07000);
      display:flex;align-items:center;justify-content:center;font-size:34px;
      margin:0 auto 14px;box-shadow:0 8px 32px rgba(240,165,0,.28);}
    .app-name{font-family:'Montserrat',sans-serif;font-weight:900;font-size:17px;color:var(--on-surface);margin-bottom:6px;}
    .app-tag-line{font-size:13px;color:var(--on-surface-var);margin-bottom:24px;}
    .app-feats{display:flex;flex-direction:column;gap:10px;margin-bottom:24px;}
    .afeat{display:flex;align-items:center;gap:12px;background:var(--container-high);
      border-radius:10px;padding:12px 14px;text-align:left;}
    .afeat-ic{font-size:18px;flex-shrink:0;}
    .afeat-tx{font-size:13px;color:var(--on-surface-var);line-height:1.4;}
    .afeat-tx strong{color:var(--on-surface);font-weight:500;}
    .store-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;}
    .sbtn{display:inline-flex;align-items:center;gap:10px;background:var(--container-top);
      border:1px solid var(--outline);border-radius:12px;padding:11px 18px;text-decoration:none;
      transition:border-color .2s,transform .2s;}
    .sbtn:hover{border-color:var(--gold);transform:translateY(-2px);}
    .sbtn-ic{font-size:22px;}
    .sbtn-tx{text-align:left;}
    .sbtn-sub{font-size:9px;color:var(--on-surface-var);letter-spacing:.5px;text-transform:uppercase;}
    .sbtn-nm{font-family:'Montserrat',sans-serif;font-weight:700;font-size:13px;color:var(--on-surface);}
    .app-right{display:flex;flex-direction:column;gap:0;}
    .app-right .s-desc{margin-bottom:28px;}

    /* CONTACT */
    #contact{background:var(--surface-deep);}
    .contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;}
    .contact-cards{display:flex;flex-direction:column;gap:14px;}
    .ccard{background:var(--container);border:1px solid var(--outline-var);border-radius:16px;
      padding:22px 26px;display:flex;align-items:center;gap:18px;
      transition:border-color .2s,transform .2s;text-decoration:none;}
    .ccard:hover{border-color:var(--gold);transform:translateX(4px);}
    .cic{width:50px;height:50px;border-radius:13px;background:var(--gold-container);
      display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0;}
    .clabel{font-size:10px;font-weight:500;letter-spacing:1px;text-transform:uppercase;
      color:var(--on-surface-var);margin-bottom:4px;}
    .cval{font-family:'Montserrat',sans-serif;font-weight:700;font-size:16px;color:var(--on-surface);}
    .chint{font-size:12px;color:var(--on-surface-var);margin-top:2px;}
    .contact-right{display:flex;flex-direction:column;gap:16px;}
    .cinfo{background:var(--container);border:1px solid var(--outline-var);border-radius:16px;padding:28px;}
    .cinfo-title{font-family:'Montserrat',sans-serif;font-weight:800;font-size:17px;color:var(--on-surface);margin-bottom:10px;}
    .cinfo p{font-size:14px;color:var(--on-surface-var);line-height:1.75;}
    .cinfo a{color:var(--gold);text-decoration:none;}
    .cazn{background:var(--gold-container);border:1px solid rgba(240,165,0,.18);border-radius:16px;
      padding:24px 28px;display:flex;align-items:center;gap:18px;}
    .cazn-ic{font-size:34px;flex-shrink:0;}
    .cazn h4{font-family:'Montserrat',sans-serif;font-weight:800;font-size:14px;color:var(--gold-light);margin-bottom:5px;}
    .cazn p{font-size:13px;color:var(--on-surface-var);line-height:1.6;}
    .cazn a{color:var(--gold);text-decoration:none;font-weight:500;}

    /* FOOTER */
    footer{background:var(--surface-deep);border-top:1px solid var(--outline-var);padding:52px 56px 28px;}
    .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:56px;
      margin-bottom:44px;padding-bottom:36px;border-bottom:1px solid var(--outline-var);}
    .fbrand{font-family:'Montserrat',sans-serif;font-weight:900;font-size:19px;color:var(--gold);margin-bottom:10px;}
    .fdesc{font-size:14px;color:var(--on-surface-var);line-height:1.7;max-width:270px;}
    .fcol h5{font-family:'Montserrat',sans-serif;font-weight:700;font-size:12px;color:var(--on-surface);letter-spacing:.4px;margin-bottom:14px;}
    .fcol ul{list-style:none;display:flex;flex-direction:column;gap:9px;}
    .fcol a{font-size:13px;color:var(--on-surface-var);text-decoration:none;transition:color .2s;}
    .fcol a:hover{color:var(--gold);}
    .fbot{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--on-surface-var);}
    .fbot a{color:var(--gold);text-decoration:none;}

    /* RESPONSIVE */
    @media(max-width:1024px){
      nav{padding:0 24px;}
      .nav-links,.nav-cta{display:none;}
      .hamburger{display:flex;}
      #home{grid-template-columns:1fr;padding:100px 28px 60px;text-align:center;}
      .hero-visual{display:none;}
      .hero-sub,.hero-btns,.hero-stats{margin-left:auto;margin-right:auto;}
      .hero-btns{justify-content:center;}
      .hero-stats{justify-content:center;}
      section{padding:60px 28px;}
      .divider{margin:0 28px;}
      #about,#app,.contact-grid{grid-template-columns:1fr;}
      .method-grid{grid-template-columns:repeat(3,1fr);}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
    }
    @media(max-width:640px){
      .books-grid{grid-template-columns:repeat(2,1fr);gap:12px;}
      .method-grid{grid-template-columns:1fr 1fr;}
      .hero-stats{flex-wrap:wrap;gap:18px;}
      footer{padding:36px 20px 20px;}
      .footer-grid{grid-template-columns:1fr;gap:22px;}
      .fbot{flex-direction:column;gap:8px;text-align:center;}
    }