/* Ovi's Little Lessons — shared styles (top bar, footer, buttons, colours).
   Page-specific styles live inside each page's <style>. */
:root{
  --bg:#f7f3ea; --card:#ffffff; --ink:#1f2a2e; --muted:#5d6b70;
  --teal:#2a9d8f; --teal-dark:#1d7268; --mustard:#e2b13c; --line:#e6dfd0;
  --chip:#eef6f4; --yt:#e62117; --yt-dark:#c4160d;
  --shadow:0 2px 0 rgba(31,42,46,.08), 0 8px 24px rgba(31,42,46,.06);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#171d1f; --card:#20282b; --ink:#eef2f1; --muted:#a7b4b6;
    --teal:#4cc2b3; --teal-dark:#7fd8cd; --mustard:#f0c55a; --line:#33403f;
    --chip:#22312f; --yt:#ff3b30; --yt-dark:#ff6058;
    --shadow:0 2px 0 rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
  }
}
:root[data-theme="dark"]{
  --bg:#171d1f; --card:#20282b; --ink:#eef2f1; --muted:#a7b4b6;
  --teal:#4cc2b3; --teal-dark:#7fd8cd; --mustard:#f0c55a; --line:#33403f;
  --chip:#22312f; --yt:#ff3b30; --yt-dark:#ff6058;
  --shadow:0 2px 0 rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-padding-top:76px}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.55 Nunito,system-ui,sans-serif;overflow-x:hidden}
a{color:var(--teal-dark)}
img{max-width:100%}
.wrap{max-width:980px;margin:0 auto;padding:0 16px}

/* ---- top bar (every page) ---- */
.topbar{position:sticky;top:0;z-index:20;background:var(--bg);border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;align-items:center;gap:10px;min-height:62px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font:600 18px/1.1 Fredoka,Nunito,sans-serif;min-width:0}
.brand img{width:38px;height:38px;border-radius:50%;border:2px solid var(--mustard);object-fit:cover;flex:none;background:var(--card)}
.brand small{display:block;font:600 11px/1.2 Nunito,sans-serif;color:var(--muted);letter-spacing:.2px}
.nav{display:flex;gap:2px;margin-left:auto}
.nav a{text-decoration:none;font-weight:700;font-size:15px;color:var(--ink);padding:8px 10px;border-radius:999px}
.nav a:hover,.nav a[aria-current="page"]{background:var(--chip);color:var(--teal-dark)}
.topbar .btn.yt{padding:9px 14px;font-size:15px;flex:none}
@media (max-width:600px){
  .brand span{display:none}
  .nav a{font-size:14px;padding:8px 8px}
}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;font-weight:700;font-size:15px;padding:10px 16px;border-radius:999px;background:var(--chip);color:var(--teal-dark);border:1px solid transparent;cursor:pointer;font-family:inherit;line-height:1.2}
.btn:hover{border-color:var(--teal)}
.btn.primary{background:var(--teal);color:#fff}
.btn.primary:hover{background:var(--teal-dark);border-color:transparent}
.eyebrow{display:inline-block;font:600 12px/1 Fredoka,sans-serif;letter-spacing:.14em;text-transform:uppercase;color:var(--ink);background:var(--mustard);padding:5px 10px;border-radius:999px}
.btn.yt{background:var(--yt);color:#fff;border-color:transparent}
.btn.yt:hover{background:var(--yt-dark)}
.btn.big{font-size:20px;padding:16px 28px;border-radius:999px;box-shadow:var(--shadow)}
.btn.block{display:flex;width:100%}

/* ---- common blocks ---- */
.card{background:var(--card);border-radius:18px;box-shadow:var(--shadow)}
h1{font:600 clamp(30px,6vw,46px)/1.05 Fredoka,Nunito,sans-serif;margin:0 0 6px;letter-spacing:-.5px}
h2{font:600 24px/1.15 Fredoka,Nunito,sans-serif;margin:0 0 6px}
.lead{margin:0;color:var(--muted);max-width:620px}
.muted{color:var(--muted)}

/* ---- footer (every page) ---- */
footer{border-top:1px solid var(--line);padding:22px 0 40px;color:var(--muted);font-size:14px;margin-top:28px}
footer .row{display:flex;flex-wrap:wrap;gap:10px 18px;margin-bottom:10px}
footer a{font-weight:700;text-decoration:none}
footer p{margin:6px 0 0}