:root {
  --navy: #0f1b3d; --blue: #3b5bdb; --blue-soft: #eef1fc; --yellow: #ffc933;
  --ink: #1b2440; --muted: #5b6482; --line: #e3e7f3; --bg: #fff;
  --ok: #1f7a4d; --danger: #b42323; --radius: 14px;
  --hand: "Segoe Print", "Bradley Hand", "Comic Sans MS", cursive;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--bg); line-height: 1.55; font-size: 1rem; }
img, svg { max-width: 100%; height: auto; }
a { color: var(--blue); }
h1, h2, h3 { color: var(--navy); line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: clamp(1.8rem, 4.2vw, 2.6rem); }
h2 { font-size: clamp(1.35rem, 3vw, 1.7rem); }
h3 { font-size: 1.1rem; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; border-radius: 6px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--navy); color: #fff; padding: .6rem 1rem; z-index: 10; }
.skip:focus { left: 8px; top: 8px; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
main { padding-bottom: 3rem; }
section { margin-top: 2.5rem; }
.muted { color: var(--muted); }

/* header / footer */
.site-header { border-bottom: 1px solid var(--line); background: #fff; position: sticky; top: 0; z-index: 5; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 1rem; }
.logo { display: inline-flex; align-items: center; gap: .4rem; text-decoration: none; color: var(--navy); font-weight: 800; font-size: 1.5rem; letter-spacing: -.02em; }
.nav { display: flex; gap: 1.25rem; align-items: center; }
.nav a { color: var(--ink); text-decoration: none; font-weight: 500; }
.nav a:hover { color: var(--blue); }
.site-footer { border-top: 1px solid var(--line); padding: 1.5rem 0; color: var(--muted); font-size: .9rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; justify-content: space-between; }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; min-height: 46px; padding: .6rem 1.25rem; border-radius: 10px;
  border: 2px solid var(--navy); background: var(--navy); color: #fff; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; }
.btn:hover:not(:disabled) { background: #1d2f63; }
.btn.alt { background: #fff; color: var(--navy); }
.btn.alt:hover:not(:disabled) { background: var(--blue-soft); }
.btn.danger { background: #fff; color: var(--danger); border-color: var(--danger); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.small { min-height: 38px; padding: .3rem .8rem; font-size: .9rem; }

/* hero */
.hero { display: grid; gap: 1.5rem; align-items: center; padding: 2rem 0 1rem; }
.hero p.lead { font-size: 1.1rem; color: var(--muted); max-width: 34rem; }
.hero .actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.25rem; }
.hero-art { position: relative; justify-self: center; width: min(100%, 460px); }
.hand { font-family: var(--hand); color: var(--blue); transform: rotate(-4deg); font-size: 1.1rem; line-height: 1.3; }
.hero-art .hand { position: absolute; right: 0; top: 0; text-align: right; }
.features { display: grid; gap: 1rem; background: var(--blue-soft); border-radius: var(--radius); padding: 1.25rem; margin-top: 1.5rem; }
.features div { display: flex; gap: .9rem; align-items: flex-start; }
.features .ico { flex: none; width: 44px; height: 44px; border-radius: 12px; background: #fff; display: grid; place-items: center; font-size: 1.4rem; }
.features strong { display: block; color: var(--navy); }
.features span { color: var(--muted); font-size: .92rem; }
@media (min-width: 760px) {
  .hero { grid-template-columns: 1.1fr 1fr; padding: 3rem 0 1.5rem; }
  .features { grid-template-columns: repeat(3, 1fr); }
}

/* sample + steps */
.two-col { display: grid; gap: 1.5rem; align-items: start; }
@media (min-width: 900px) { .two-col { grid-template-columns: 1.6fr 1fr; } }
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; }
.steps li { display: flex; gap: .9rem; align-items: flex-start; }
.steps .num { flex: none; width: 40px; height: 40px; border-radius: 50%; background: var(--blue-soft); color: var(--blue); font-weight: 800; display: grid; place-items: center; font-size: 1.1rem; }
.steps strong { display: block; color: var(--navy); }
.steps span { color: var(--muted); font-size: .92rem; }

/* player */
.player { position: relative; aspect-ratio: 16 / 9; width: 100%; background: var(--navy); border-radius: var(--radius); overflow: hidden; }
.player iframe, .poster { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.poster { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .9rem; padding: 1rem; text-align: center; color: #dbe2ff;
  background: radial-gradient(circle at 20% 20%, #28418f, var(--navy) 70%); }
.poster .btn { background: var(--yellow); border-color: var(--yellow); color: var(--navy); font-size: 1.1rem; }
.poster .btn:hover { background: #ffd75e; }
.poster p { margin: 0; font-size: .82rem; max-width: 30rem; }
.poster a { color: #fff; }
.controls { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: .9rem; }
.controls .btn { flex: 1 1 auto; }
.hint { font-size: .85rem; color: var(--muted); margin: .5rem 0 0; }
.text-panel { margin-top: 1rem; padding: 1.1rem 1.25rem; background: var(--blue-soft); border-radius: var(--radius); border: 1px solid var(--line); }
.text-panel p { margin: 0 0 .7rem; font-size: 1.1rem; }
.text-panel p:last-child { margin-bottom: 0; }
.text-panel h2 { font-size: 1.1rem; }

/* categories */
.cat { border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: .75rem; background: #fff; overflow: hidden; }
.cat summary { cursor: pointer; list-style: none; padding: 1rem 1.1rem; min-height: 56px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; font-weight: 700; color: var(--navy); }
.cat summary::-webkit-details-marker { display: none; }
.cat summary::after { content: "▾"; color: var(--blue); transition: transform .15s; }
.cat[open] summary::after { transform: rotate(180deg); }
.cat[open] summary { background: var(--blue-soft); }
.cat .count { margin-left: auto; font-weight: 400; color: var(--muted); font-size: .9rem; }
.cat ul { list-style: none; margin: 0; padding: .4rem 1.1rem 1rem; display: grid; gap: .1rem; }
.cat li a { display: flex; justify-content: space-between; gap: 1rem; padding: .65rem .2rem; min-height: 44px; text-decoration: none; color: var(--ink); border-bottom: 1px solid var(--line); }
.cat li a:hover { color: var(--blue); }
.cat li:last-child a { border-bottom: 0; }

/* video page */
.crumbs { font-size: .9rem; margin: 1.25rem 0 .25rem; }
.layout { display: grid; gap: 1.5rem; }
@media (min-width: 960px) { .layout { grid-template-columns: minmax(0, 1fr) 340px; align-items: start; } }
.layout aside h2 { font-size: 1.1rem; }
.vlist { list-style: none; margin: 0; padding: 0; display: grid; gap: .75rem; }
.vcard { display: flex; gap: .75rem; text-decoration: none; color: var(--ink); }
.vcard:hover strong { color: var(--blue); }
.tile { flex: none; width: 128px; aspect-ratio: 16 / 9; border-radius: 10px; display: grid; place-items: center; font-size: 1.4rem; color: var(--navy); }
.vcard strong { display: block; line-height: 1.3; }
.vcard small { color: var(--muted); }
.t0 { background: #e9e4fb; } .t1 { background: #dff1fb; } .t2 { background: #ffeed6; }
.t3 { background: #def5e8; } .t4 { background: #fde3ea; } .t5 { background: #fff6c9; }
.chips { display: flex; flex-wrap: wrap; gap: .6rem; }
.chip { display: inline-flex; align-items: center; min-height: 44px; padding: .4rem 1rem; border-radius: 999px; border: 1px solid var(--line); background: #fff; text-decoration: none; color: var(--navy); font-weight: 500; }
.chip:hover, .chip[aria-current] { background: var(--blue-soft); border-color: var(--blue); }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.grid .vcard { flex-direction: column; padding: .75rem; border: 1px solid var(--line); border-radius: var(--radius); }
.grid .tile { width: 100%; }

/* forms / admin */
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; background: #fff; }
form.stack { display: grid; gap: 1rem; }
label { display: grid; gap: .3rem; font-weight: 600; font-size: .95rem; }
label small { font-weight: 400; color: var(--muted); }
input[type=text], input[type=password], select, textarea { font: inherit; padding: .6rem .75rem; border: 1.5px solid #c9d0e6; border-radius: 10px; width: 100%; background: #fff; color: var(--ink); }
textarea { min-height: 8rem; resize: vertical; }
label.check { display: flex; gap: .6rem; align-items: center; font-weight: 500; }
label.check input { width: 22px; height: 22px; }
.row { display: grid; gap: 1rem; }
@media (min-width: 640px) { .row.two { grid-template-columns: 1fr 1fr; } }
.msg { margin: 0; font-weight: 600; }
.msg.err { color: var(--danger); } .msg.ok { color: var(--ok); }
.narrow { max-width: 420px; margin: 3rem auto; }
.admin-grid { display: grid; gap: 1.5rem; }
@media (min-width: 960px) { .admin-grid { grid-template-columns: 1fr 1fr; align-items: start; } }
.tbl { list-style: none; padding: 0; margin: 0; }
.tbl li { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; justify-content: space-between; padding: .6rem 0; border-bottom: 1px solid var(--line); }
.tbl li:last-child { border-bottom: 0; }
.tbl .sub { padding-left: 1.5rem; }
.tbl .actions { display: flex; gap: .4rem; flex-wrap: wrap; }
.prose { max-width: 46rem; }
.prose h2 { margin-top: 2rem; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }
.layout > section { grid-column: 1 / -1; }
.features p, .steps p { margin: 0; }
.tbl form.actions { flex-wrap: nowrap; width: 100%; }
.tbl form.actions input { flex: 1; }
.card h2 { margin-top: 0; }
.tagline { font-size: 1.25rem; font-weight: 700; color: var(--blue); margin: 0 0 .75rem; }
.crumbs { font-size: .9rem; margin: 1.25rem 0 .25rem; color: var(--muted); }
section + section, .layout > section { margin-top: 1.5rem; }