/* ============================================================
   Undugu — /newsite design system
   Brand: purple #6C5CE7 · gold #F0A31F · ink #28215A (from the Undugu app)
   ============================================================ */
/* Brand palette from the Undugu app (Figma logo trials): purple + gold.
   Variable names kept from the old teal theme to avoid a rename sweep. */
:root{
  --teal:#6C5CE7;
  --teal-dark:#5244C9;
  --teal-ink:#28215A;
  --orange:#F0A31F;
  --orange-dark:#D68C0A;
  --ink:#211d3a;
  --muted:#5b6570;
  --bg:#F9FAFB;
  --card:#ffffff;
  --line:#e6e5f0;
  --teal-tint:#ECEAFB;
  --orange-tint:#FDF3DD;
  --radius:14px;
  --shadow:0 2px 10px rgba(16,42,38,.07);
  --shadow-lg:0 10px 30px rgba(16,42,38,.12);
  --font-head:"Montserrat",ui-sans-serif,system-ui,sans-serif;
  --font-body:"Open Sans",system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font-body);color:var(--ink);background:var(--bg);line-height:1.65;font-size:16.5px}
h1,h2,h3,h4{font-family:var(--font-head);line-height:1.22;margin:0 0 14px;color:var(--ink)}
h1{font-size:clamp(1.9rem,4.2vw,3rem);font-weight:800}
h2{font-size:clamp(1.45rem,3vw,2.1rem);font-weight:800}
h3{font-size:1.15rem;font-weight:700}
p{margin:0 0 14px}
a{color:var(--teal-dark);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.wrap{max-width:1140px;margin:0 auto;padding:0 22px}
.section{padding:64px 0}
.section.tight{padding:40px 0}
.section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section.teal{background:linear-gradient(135deg,var(--teal-ink),var(--teal-dark));color:#f2faf9}
.section.teal h2,.section.teal h3{color:#fff}
.section.teal p{color:#d9edeb}
.center{text-align:center}
.muted{color:var(--muted)}
.small{font-size:.9rem}
.kicker{display:inline-block;font-family:var(--font-head);font-weight:700;font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:var(--teal-dark);background:var(--teal-tint);padding:6px 14px;border-radius:999px;margin-bottom:16px}
.section.teal .kicker{background:rgba(255,255,255,.14);color:#ffd9a0}
.lead{font-size:1.15rem;color:var(--muted);max-width:46em}
.section.teal .lead{color:#cfe8e5}

/* Buttons */
.btn{display:inline-block;padding:13px 26px;border-radius:999px;font-family:var(--font-head);font-weight:700;font-size:.95rem;border:2px solid transparent;cursor:pointer;transition:transform .15s,box-shadow .15s}
.btn:hover{text-decoration:none;transform:translateY(-1px);box-shadow:var(--shadow-lg)}
.btn-accent{background:var(--orange);color:#fff}
.btn-accent:hover{background:var(--orange-dark)}
.btn-teal{background:var(--teal);color:#fff}
.btn-teal:hover{background:var(--teal-dark)}
.btn-outline{border-color:var(--teal);color:var(--teal-dark);background:transparent}
.btn-outline-light{border-color:#fff;color:#fff;background:transparent}
.btns{display:flex;gap:14px;flex-wrap:wrap;align-items:center}

/* Header */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:26px;padding:14px 22px;max-width:1240px;margin:0 auto}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-head);font-weight:800;font-size:1.25rem;color:var(--ink);letter-spacing:.02em}
.brand:hover{text-decoration:none}
.brand svg{width:30px;height:30px}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;list-style:none;padding:0}
.nav-links>li{position:relative}
.nav-links a{display:block;padding:9px 13px;border-radius:9px;color:var(--ink);font-weight:600;font-size:.94rem}
.nav-links a:hover{background:var(--teal-tint);text-decoration:none}
.nav-links a.active{color:var(--teal-dark);background:var(--teal-tint)}
.dropdown>a::after{content:" ▾";font-size:.7em}
.dropdown ul{display:none;position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-lg);min-width:230px;padding:8px;list-style:none;margin:0}
.dropdown:hover ul,.dropdown:focus-within ul{display:block}
.nav-cta{display:flex;gap:10px;margin-left:10px}
.nav-cta .btn{padding:9px 18px;font-size:.87rem}
.nav-toggle{display:none;margin-left:auto;background:none;border:0;font-size:1.7rem;cursor:pointer;color:var(--ink)}

/* Hero */
.hero{padding:72px 0 64px;background:
  radial-gradient(1000px 500px at 85% -10%,rgba(108,92,231,.14),transparent),
  radial-gradient(700px 400px at -10% 110%,rgba(240,163,31,.12),transparent)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero img{border-radius:var(--radius);box-shadow:var(--shadow-lg)}

/* Cards & grids */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.card h3{margin-top:2px}
.card.link-card{transition:transform .15s,box-shadow .15s;color:inherit;display:block}
.card.link-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);text-decoration:none}
.card .go{color:var(--orange-dark);font-weight:700;font-size:.92rem}
.icon-dot{width:46px;height:46px;border-radius:12px;background:var(--teal-tint);display:flex;align-items:center;justify-content:center;font-size:1.35rem;margin-bottom:14px}

/* Stat strip */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;text-align:center}
.stat b{display:block;font-family:var(--font-head);font-size:2rem;font-weight:800;color:var(--teal-dark)}
.section.teal .stat b{color:#ffcf87}
.stat span{color:var(--muted);font-size:.92rem}
.section.teal .stat span{color:#cfe8e5}

/* Split rows */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.split.rev{grid-template-columns:.95fr 1.05fr}
.split img{border-radius:var(--radius);box-shadow:var(--shadow-lg)}

/* Tables */
.tbl{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);font-size:.95rem}
.tbl th{background:var(--teal-ink);color:#fff;text-align:left;padding:12px 16px;font-family:var(--font-head);font-size:.85rem;letter-spacing:.04em}
.tbl td{padding:12px 16px;border-top:1px solid var(--line);vertical-align:top}
.tbl tr:nth-child(even) td{background:#fafcfc}
.tbl-scroll{overflow-x:auto;border-radius:var(--radius)}

/* Checklist */
.checks{list-style:none;padding:0;margin:0 0 16px}
.checks li{padding:7px 0 7px 34px;position:relative}
.checks li::before{content:"✓";position:absolute;left:4px;top:6px;width:22px;height:22px;border-radius:50%;background:var(--teal-tint);color:var(--teal-dark);font-weight:800;font-size:.85rem;display:flex;align-items:center;justify-content:center}

/* Gallery */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.gallery img{border-radius:12px;aspect-ratio:4/3;object-fit:cover;width:100%;box-shadow:var(--shadow);transition:transform .15s}
.gallery img:hover{transform:scale(1.02)}
.gallery figcaption{font-size:.85rem;color:var(--muted);margin-top:6px}

/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--orange),#ffc866);border-radius:20px;padding:44px 40px;color:#3d2600;display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;box-shadow:var(--shadow-lg)}
.cta-band h2{color:#3d2600;margin:0 0 6px}
.cta-band p{margin:0;color:#5c3a00}

/* Badges / pills */
.pill{display:inline-block;background:var(--orange-tint);color:#8a5200;border-radius:999px;padding:5px 13px;font-size:.83rem;font-weight:700;margin:0 6px 8px 0}
.pill.teal{background:var(--teal-tint);color:var(--teal-ink)}

/* Level ladder */
.ladder{list-style:none;margin:0;padding:0;counter-reset:lvl}
.ladder li{display:flex;gap:18px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-bottom:12px;box-shadow:var(--shadow)}
.ladder .lvl-no{counter-increment:lvl;flex:0 0 46px;height:46px;border-radius:50%;background:var(--teal);color:#fff;font-family:var(--font-head);font-weight:800;display:flex;align-items:center;justify-content:center;font-size:1.05rem}
.ladder b{font-family:var(--font-head)}
.ladder .bench{font-size:.85rem;color:var(--muted)}

/* FAQ */
details.faq{background:#fff;border:1px solid var(--line);border-radius:12px;padding:4px 22px;margin-bottom:12px;box-shadow:var(--shadow)}
details.faq summary{font-family:var(--font-head);font-weight:700;padding:14px 0;cursor:pointer;list-style:none;position:relative;padding-right:30px}
details.faq summary::after{content:"+";position:absolute;right:2px;top:12px;font-size:1.4rem;color:var(--teal)}
details.faq[open] summary::after{content:"–"}
details.faq p{color:var(--muted)}

/* Video */
.video-frame{width:100%;border-radius:var(--radius);box-shadow:var(--shadow-lg);background:#000}
iframe.video-frame{aspect-ratio:16/9;border:0;display:block}
iframe.video-frame.portrait{aspect-ratio:9/16}

/* Footer */
.site-footer{background:var(--teal-ink);color:#bcd9d5;padding:56px 0 30px;margin-top:70px}
.site-footer a{color:#dff0ee}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px;margin-bottom:36px}
.site-footer h4{color:#fff;font-size:.95rem;letter-spacing:.06em;text-transform:uppercase}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:9px;font-size:.94rem}
.foot-brand{font-family:var(--font-head);font-weight:800;font-size:1.3rem;color:#fff;display:flex;gap:10px;align-items:center;margin-bottom:12px}
.social-row{display:flex;gap:12px;margin-top:16px}
.social-row a{width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center}
.social-row a:hover{background:var(--orange)}
.social-row svg{width:17px;height:17px;fill:#fff}
.foot-base{border-top:1px solid rgba(255,255,255,.15);padding-top:22px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:.88rem}

/* Abacus simulator (try.html) */
.abacus-shell{background:linear-gradient(160deg,#26333b,#1a2329);border-radius:22px;padding:28px 20px 22px;box-shadow:var(--shadow-lg);max-width:960px;margin:0 auto}
.abacus-value{font-family:var(--font-head);font-weight:800;font-size:clamp(1.4rem,3.5vw,2.2rem);color:#ffcf87;text-align:center;letter-spacing:.06em;margin-bottom:14px;font-variant-numeric:tabular-nums}
.abacus-frame{background:#8a5a33;border-radius:14px;padding:14px 10px;border:6px solid #6d4526}
.abacus-rods{display:flex;justify-content:space-between;gap:4px}
.rod{flex:1;display:flex;flex-direction:column;align-items:center;position:relative;cursor:pointer}
.rod-line{position:absolute;top:0;bottom:0;width:4px;background:#c9a276;border-radius:2px}
.bead{width:86%;max-width:44px;aspect-ratio:2.1/1;clip-path:polygon(0% 34%,38% 0%,62% 0%,100% 34%,100% 66%,62% 100%,38% 100%,0% 66%);background:radial-gradient(circle at 35% 30%,#9b8cf5,#5b4cd6);position:relative;z-index:2;margin:0;transition:transform .12s ease}
.bead.orange{background:radial-gradient(circle at 35% 30%,#ffcf6e,#e09a10)}
.rod .beam{width:120%;height:10px;background:#4a3018;z-index:3;margin:6px 0;border-radius:2px}
.rod .gap{height:26px;z-index:1}
.rod .unit-dot{position:absolute;top:50%;width:8px;height:8px;background:#fff;border-radius:50%;z-index:4;transform:translateY(-1px)}
.rod-letter{color:#93a7ad;font-size:.72rem;margin-top:6px;font-family:var(--font-head)}
.abacus-controls{display:flex;gap:12px;justify-content:center;margin-top:18px;flex-wrap:wrap}

/* Reveal animation */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .5s,transform .5s}
.reveal.in{opacity:1;transform:none}

/* Responsive */
@media(max-width:960px){
  .hero-grid,.split,.split.rev{grid-template-columns:1fr}
  .grid-3,.grid-4{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:1fr 1fr}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 18px 20px;border-bottom:1px solid var(--line);box-shadow:var(--shadow-lg);gap:2px}
  .nav-links.open{display:flex}
  .dropdown ul{display:block;position:static;box-shadow:none;border:0;padding-left:16px}
  .nav-cta{display:none}
  .nav-toggle{display:block}
}
@media(max-width:600px){
  .grid-3,.grid-4,.gallery{grid-template-columns:1fr}
  .gallery{grid-template-columns:1fr 1fr}
  .section{padding:44px 0}
  .cta-band{padding:30px 24px}
  .bead{max-width:26px}
  .rod-letter{font-size:.6rem}
}