/* QuantafiAI — design system Warm editorial base + dark "data lab" sections. Fraunces (display) + Space Grotesk (sans). Class vocabulary is intentional — index.html composes from exactly these names. */ /* Fonts load via in index.html (Fraunces incl. italic + Space Grotesk). */ :root{ --ink:#0b1a2a; --ink-soft:#1a2b3f; --muted:#52637a; --sand:#f6f1e9; --sand-deep:#efe7d8; --cloud:#f7fafc; --mint:#d6efe5; --teal:#1c8f88; --teal-dk:#15716b; --coral:#f26b4f; --gold:#f3c969; --line:rgba(11,26,42,.12); --line-soft:rgba(11,26,42,.07); --card:#fff; --d-bg:#0b1a2a; --d-bg2:#0f2236; --d-line:rgba(255,255,255,.12); --d-text:rgba(255,255,255,.74); --r-lg:26px; --r-md:18px; --r-sm:12px; --shadow:0 22px 50px rgba(11,26,42,.12); --shadow-sm:0 12px 30px rgba(11,26,42,.07); --sans:"Space Grotesk","Helvetica Neue",sans-serif; --serif:"Fraunces","Georgia",serif; --maxw:1120px; } *{box-sizing:border-box;margin:0;padding:0} html{scroll-behavior:smooth} body{font-family:var(--sans);color:var(--ink);background:var(--cloud);line-height:1.7;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility} ::selection{background:var(--teal);color:#fff} .lang-en [data-lang="vi"]{display:none} .lang-vi [data-lang="en"]{display:none} .wrap{max-width:var(--maxw);margin:0 auto;padding:0 26px} h1,h2,h3{font-family:var(--serif);font-weight:500;line-height:1.12;letter-spacing:-.012em} .grad{color:var(--teal-dk)} .em{font-style:italic;color:var(--teal-dk)} /* editorial emphasis word */ a{color:inherit;text-decoration:none} .gradbar{height:4px;background:linear-gradient(90deg,var(--teal),var(--gold) 55%,var(--coral))} /* eyebrow / section heads */ .eyebrow{font-family:var(--sans);font-size:12.5px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--teal-dk);margin-bottom:14px} .sec-head h2{font-size:clamp(1.9rem,3.6vw,2.7rem);max-width:20ch} .sec-head p{color:var(--muted);max-width:60ch;margin-top:14px;font-size:1.08rem} /* buttons */ .btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--sans);font-weight:500;font-size:15px;padding:14px 24px;border-radius:999px;cursor:pointer;border:1px solid transparent;transition:transform .18s,background .18s,box-shadow .18s} .btn-primary{background:var(--teal);color:#fff;box-shadow:0 14px 30px rgba(28,143,136,.30)} .btn-primary:hover{background:var(--teal-dk);transform:translateY(-2px)} .btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)} .btn-ghost:hover{background:#fff;box-shadow:var(--shadow-sm);transform:translateY(-2px)} .sec--dark .btn-ghost{border-color:var(--d-line);color:#fff} .sec--dark .btn-ghost:hover{background:rgba(255,255,255,.06);box-shadow:none} /* nav */ nav{position:sticky;top:0;z-index:50;background:rgba(247,250,252,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)} nav .wrap{display:flex;align-items:center;justify-content:space-between;height:70px} .brand{font-family:var(--serif);font-weight:600;font-size:22px;letter-spacing:-.02em} .brand b{color:var(--teal);font-weight:600} .nav-right{display:flex;align-items:center;gap:16px} .nav-links{display:flex;gap:26px;font-size:14px;color:var(--muted)} .nav-links a:hover{color:var(--ink)} .toggle{display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;background:#fff} .toggle button{font-family:var(--sans);font-size:12.5px;font-weight:500;padding:6px 13px;border:none;background:transparent;color:var(--muted);cursor:pointer} .toggle button.on{background:var(--ink);color:#fff} /* section system */ section{padding:84px 0} .sec--warm{background:var(--sand);border-top:1px solid var(--line-soft)} .sec--dark{background:var(--d-bg);color:var(--d-text);position:relative;overflow:hidden} .sec--dark::before{content:"";position:absolute;inset:0;background:radial-gradient(120% 90% at 80% -10%,rgba(28,143,136,.18),transparent 60%);pointer-events:none} .sec--dark .wrap{position:relative} .sec--dark h2,.sec--dark h3{color:#fff} .sec--dark .eyebrow{color:var(--gold)} .sec--dark .sec-head p{color:rgba(255,255,255,.62)} /* hero */ .hero{background:linear-gradient(180deg,var(--sand),var(--cloud));padding:96px 0 84px} .pill{display:inline-block;font-size:13px;font-weight:500;color:var(--teal-dk);background:var(--mint);padding:7px 16px;border-radius:999px;margin-bottom:24px} .hero h1{font-size:clamp(2.6rem,6vw,4rem);max-width:15ch} .hero .lead{font-size:clamp(1.08rem,2vw,1.3rem);color:var(--ink-soft);max-width:58ch;margin:24px 0 32px} .hero-cta{display:flex;gap:14px;flex-wrap:wrap} .trust{margin-top:44px;display:flex;flex-wrap:wrap;gap:12px 30px;font-size:14px;color:var(--muted)} .trust b{color:var(--ink);font-weight:500} /* cards / services */ .grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:46px} .card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:32px 28px;box-shadow:var(--shadow-sm);transition:transform .22s,box-shadow .22s} .card:hover{transform:translateY(-4px);box-shadow:var(--shadow)} .icon{width:52px;height:52px;border-radius:15px;display:flex;align-items:center;justify-content:center;margin-bottom:20px} .icon svg{width:27px;height:27px;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round} .ic-teal{background:var(--mint)}.ic-teal svg{stroke:var(--teal-dk)} .ic-coral{background:#fde3db}.ic-coral svg{stroke:#c44a30} .ic-gold{background:#fdf0cf}.ic-gold svg{stroke:#b78416} .card h3{font-size:1.34rem;margin-bottom:11px} .card p{color:var(--muted);font-size:.99rem} /* stats + charts (dark) */ .stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:46px 0 0} .stat{background:rgba(255,255,255,.05);border:1px solid var(--d-line);border-radius:var(--r-md);padding:24px 22px} .statbig{font-family:var(--serif);font-size:2.5rem;font-weight:600;line-height:1} .statbig.t{color:var(--mint)}.statbig.c{color:var(--coral)}.statbig.g{color:var(--gold)} .stat .lbl{color:rgba(255,255,255,.66);font-size:.93rem;margin-top:9px} .chartrow{display:grid;grid-template-columns:1.4fr 1fr;gap:22px;margin-top:24px} .chartframe{background:rgba(255,255,255,.05);border:1px solid var(--d-line);border-radius:var(--r-md);padding:22px} .chartframe h4{font-family:var(--sans);font-weight:500;font-size:.98rem;color:rgba(255,255,255,.8);margin-bottom:6px} .chartframe .cap-note{font-size:12.5px;color:rgba(255,255,255,.5)} .chart-canvas{position:relative;width:100%;height:200px;margin-top:10px} .ring-wrap{display:flex;align-items:center;justify-content:center;height:200px} .ring{--p:60;width:160px;height:160px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--coral) calc(var(--p)*1%),rgba(255,255,255,.10) 0)} .ring::before{content:"";position:absolute;width:120px;height:120px;border-radius:50%;background:var(--d-bg)} .ring span{position:relative;font-family:var(--serif);font-size:2rem;font-weight:600;color:var(--coral)} .cap{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:26px} .cap div{background:rgba(255,255,255,.05);border:1px solid var(--d-line);border-radius:var(--r-sm);padding:16px 16px;font-size:.95rem;color:#fff;display:flex;gap:10px;align-items:center} .cap i{color:var(--mint);font-style:normal} /* methodology steps */ .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:46px} .step{padding-top:16px;border-top:2px solid var(--line)} .step .n{font-family:var(--serif);font-size:1.6rem;color:var(--teal);font-weight:600} .step h4{font-family:var(--sans);font-weight:500;font-size:1.06rem;margin:7px 0} .step p{font-size:.93rem;color:var(--muted)} /* teaching / curriculum */ .teach-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:46px;align-items:center;margin-top:18px} .curric{display:grid;grid-template-columns:repeat(3,1fr);gap:10px} .curric span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 14px;font-size:13px;color:var(--ink-soft);text-align:center} .teach-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px} .subscribe{margin-top:22px;display:flex;gap:10px;flex-wrap:wrap;max-width:440px} .subscribe input{flex:1;min-width:200px} .note{font-size:13px;color:var(--muted);margin-top:8px} /* about */ .about{display:grid;grid-template-columns:320px 1fr;gap:54px;align-items:center} .portrait{aspect-ratio:4/5;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow);background:linear-gradient(150deg,var(--teal),var(--ink) 70%)} .portrait img{width:100%;height:100%;object-fit:cover;display:block} .about .role{color:var(--teal-dk);font-weight:500;margin:8px 0 18px} .about p{color:var(--ink-soft);margin-bottom:14px} .creds{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px} .creds span{font-size:13px;background:var(--sand);border:1px solid var(--line);color:var(--ink-soft);padding:6px 13px;border-radius:999px} /* forms (shared; styled for dark contact section) */ .form{max-width:540px;margin:0 auto;display:grid;gap:13px;text-align:left} .form .row{display:grid;grid-template-columns:1fr 1fr;gap:13px} input,textarea{font-family:var(--sans);font-size:15px;padding:14px 16px;border-radius:var(--r-sm);border:1px solid var(--line);background:#fff;color:var(--ink);width:100%} .sec--dark .form input,.sec--dark .form textarea{background:rgba(255,255,255,.07);border-color:var(--d-line);color:#fff} .sec--dark .form input::placeholder,.sec--dark .form textarea::placeholder{color:rgba(255,255,255,.45)} textarea{min-height:120px;resize:vertical} .form button{justify-content:center} .form-note{font-size:13px;text-align:center;margin-top:4px} .sec--dark .form-note{color:rgba(255,255,255,.55)} .cta-card{max-width:680px;margin:0 auto;text-align:center} .cta-card h2{color:#fff} .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0} /* footer */ footer{background:var(--ink);color:rgba(255,255,255,.7);padding:48px 0} footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:18px;align-items:center} footer .brand{color:#fff} footer a{color:rgba(255,255,255,.7)}footer a:hover{color:#fff} /* motion: count-up lives in main.js. Reveal-hiding is gated on body.reveal-on (added by JS) so content stays visible if JS never runs. */ .reveal{transition:opacity .6s ease,transform .6s ease} body.reveal-on .reveal{opacity:0;transform:translateY(18px)} body.reveal-on .reveal.in{opacity:1;transform:none} @media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto} body.reveal-on .reveal{opacity:1;transform:none} .btn,.card{transition:none} } @media(max-width:880px){ .nav-links{display:none} .grid3,.stats,.cap,.steps{grid-template-columns:1fr 1fr} .chartrow,.teach-grid{grid-template-columns:1fr} .about{grid-template-columns:1fr;gap:30px}.portrait{max-width:260px} } @media(max-width:560px){ .grid3,.stats,.cap,.steps,.curric,.form .row{grid-template-columns:1fr} section{padding:60px 0} } /* ===== membership plan card ===== */ .planwrap{display:flex;justify-content:center;margin-top:44px} .plan{background:#fff;color:var(--ink);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:40px 36px;max-width:470px;width:100%;text-align:left;position:relative} .plan .ribbon{position:absolute;top:-14px;left:36px;background:var(--coral);color:#fff;font-size:12px;font-weight:600;letter-spacing:.03em;padding:6px 15px;border-radius:999px} .plan .price{font-family:var(--serif);font-size:3.2rem;font-weight:600;line-height:1;color:var(--ink)} .plan .price small{font-family:var(--sans);font-size:1.05rem;color:var(--muted);font-weight:400} .plan .plan-sub{color:var(--muted);font-size:.95rem;margin-top:4px} .plan ul{list-style:none;margin:24px 0 26px;display:grid;gap:13px} .plan li{display:flex;gap:11px;align-items:flex-start;font-size:1.02rem;color:var(--ink-soft)} .plan li::before{content:"✓";color:var(--teal);font-weight:700;flex:none;margin-top:1px} .plan .btn{width:100%;justify-content:center} .plan .plan-note{font-size:12.5px;color:var(--muted);text-align:center;margin-top:14px;line-height:1.55} /* ===== business (demoted consulting) band ===== */ .biz{background:var(--sand);border:1px solid var(--line);border-radius:var(--r-lg);padding:30px 34px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap} .biz h3{font-size:1.4rem;margin:6px 0 8px} .biz p{color:var(--muted);font-size:.98rem;max-width:52ch} .biz .btn{flex:none} .linky{color:var(--teal-dk);font-size:14px;border-bottom:1px solid transparent} .linky:hover{border-bottom-color:var(--teal-dk)} /* ===== plans (3 tiers) ===== */ .tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:44px;align-items:stretch} .tier{background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-sm);padding:32px 26px;display:flex;flex-direction:column;position:relative} .tier.feat{box-shadow:var(--shadow);outline:2px solid var(--teal);outline-offset:-1px} .tier .ribbon{position:absolute;top:-13px;left:26px;background:var(--coral);color:#fff;font-size:11.5px;font-weight:600;letter-spacing:.03em;padding:5px 13px;border-radius:999px} .tier .tname{font-family:var(--sans);font-weight:600;font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;color:var(--teal-dk)} .tier .tprice{font-family:var(--serif);font-size:2.6rem;font-weight:600;line-height:1;margin:8px 0 4px;color:var(--ink)} .tier .tprice small{font-family:var(--sans);font-size:.9rem;color:var(--muted);font-weight:400} .tier ul{list-style:none;margin:20px 0 24px;display:grid;gap:11px;flex:1} .tier li{display:flex;gap:10px;align-items:flex-start;font-size:.95rem;color:var(--ink-soft)} .tier li::before{content:"✓";color:var(--teal);font-weight:700;flex:none;margin-top:1px} .tier .btn{width:100%;justify-content:center} .tier .btn-ghost{border-color:var(--teal);color:var(--teal-dk)} .tier .btn-ghost:hover{background:var(--mint);box-shadow:none} .tiers-note{text-align:center;color:rgba(255,255,255,.6);font-size:13px;margin-top:20px} @media(max-width:880px){ .tiers{grid-template-columns:1fr;max-width:420px;margin-left:auto;margin-right:auto} }