@font-face{font-family:"Plus Jakarta Sans";src:url(../fonts/jakarta.woff2) format("woff2");font-weight:400 800;font-display:swap}
@font-face{font-family:"Montserrat";src:url(../fonts/montserrat.woff2) format("woff2");font-weight:700 900;font-display:swap}

/* Sand + Cyprus: two colours only. --red/--navy are legacy role names (primary / brand), both Cyprus now.
   The client logo keeps its own navy + red via --logo-n / --logo-r. */
:root{
  --sand:#F0EDE5; --paper:#FAF8F3; --cy:#004643; --cy-d:#00302E; --cy-m:#2E6B66; --bronze:#8A6A3A;
  --logo-n:#1A2A5C; --logo-r:#C8151D;
  --navy:#004643; --red:#004643; --red-h:#00302E; --red-soft:#EFE7D8;
  --ink:#00302E; --ink-2:#003B38; --ink-3:#0B4B47;
  --h:#0F2A28; --t:#3B4F4C; --m:#6E7F7B;
  --bg:#F0EDE5; --soft:#E8E3D8; --soft-2:#DFD8C9; --line:#D8D0BF;
  --mint:#E8E3D8; --butter:#E8E3D8; --rose:#EFE7D8; --aqua:#E8E3D8; --sky:#E8E3D8;
  --yellow:#F0EDE5; --ok:#004643; --ok-soft:#DCE8E4;
  --code-bg:#FAF8F3; --code-line:#DDD6C6;
  --tk-tag:#004643; --tk-attr:#8A6A3A; --tk-str:#2E6B66; --tk-com:#8A9590; --tk-kw:#8A6A3A; --tk-num:#8A6A3A; --tk-fn:#004643; --tk-plain:#1E3431;
  --sans:"Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:ui-monospace,"Cascadia Code","SF Mono",Consolas,Menlo,monospace;
  --r:16px; --r-s:8px; --r-m:12px;
  --sh-1:0 1px 2px rgba(15,42,40,.06),0 2px 8px rgba(15,42,40,.06);
  --sh-2:0 1px 2px rgba(15,42,40,.08),0 8px 24px rgba(15,42,40,.10),0 24px 48px -16px rgba(15,42,40,.16);
  --sh-red:0 1px 2px rgba(0,48,46,.3),0 8px 20px -6px rgba(0,70,67,.45);
  --hd:64px; --sub:48px;
  --ease:cubic-bezier(.2,.7,.2,1);
  color-scheme:light;
}
:root[data-theme="dark"]{
  --bg:#0B1F1D; --soft:#102825; --soft-2:#163330; --line:#22413D; --paper:#102825;
  --h:#F0EDE5; --t:#C9D3CF; --m:#8FA39E;
  --navy:#2E6B66; --red:#2E6B66; --red-h:#3A7D77;
  --mint:#163330; --butter:#163330; --rose:#2A2418; --aqua:#163330; --sky:#163330;
  --red-soft:#2A2418; --ok-soft:#163330; --ok:#7FC4BA; --bronze:#D9C49A;
  --code-bg:#0E2724; --code-line:#22413D;
  --tk-tag:#7FC4BA; --tk-attr:#D9C49A; --tk-str:#A9D3CB; --tk-com:#6F8580; --tk-kw:#D9C49A; --tk-num:#D9C49A; --tk-fn:#7FC4BA; --tk-plain:#E6EDEA;
  --sh-1:0 1px 2px rgba(0,0,0,.3),0 2px 8px rgba(0,0,0,.25);
  --sh-2:0 1px 2px rgba(0,0,0,.35),0 8px 24px rgba(0,0,0,.35),0 24px 48px -16px rgba(0,0,0,.5);
  color-scheme:dark;
}

/* ---------- base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--hd) + var(--sub) + 16px)}
body{margin:0;background:var(--bg);color:var(--t);font:400 1rem/1.65 var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{display:block;max-width:100%}
a{color:inherit}
h1,h2,h3,h4{color:var(--h);line-height:1.15;letter-spacing:-.02em;margin:0;font-weight:800}
p{margin:0}
code,pre,kbd,textarea.code{font-family:var(--mono)}
button,input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:3px solid #2E6B66;outline-offset:2px;border-radius:4px}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:16px;top:-64px;z-index:200;padding:8px 16px;background:var(--red);color:#fff;border-radius:var(--r-s);font-weight:700}
.skip:focus{top:8px}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.ic{width:20px;height:20px;flex:none;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ---------- logo ---------- */
.lg-n{fill:var(--logo-n)} .lg-r{fill:var(--logo-r)} .lg-ns{stroke:var(--logo-n)} .lg-rs{stroke:var(--logo-r)} .lg-w{stroke:#fff}
.brand{display:inline-flex;align-items:center;gap:8px;min-height:44px;text-decoration:none;flex:none}
.brand__mark{width:40px;height:40px;flex:none}
.brand__txt{display:flex;flex-direction:column;padding-left:8px;border-left:2px solid var(--logo-n);line-height:1}
.brand__word{position:relative;font:800 1.35rem/1 "Montserrat",var(--sans);letter-spacing:.005em;color:var(--logo-n)}
.brand__i{position:relative;display:inline-block}
.brand__cap{position:absolute;left:50%;top:-.36em;width:1.1em;height:.6em;max-width:none;transform:translateX(-47%)}
.brand__txt small{margin-top:4px;font:700 .58rem/1 "Montserrat",var(--sans);letter-spacing:.12em;text-transform:uppercase;color:var(--logo-r);white-space:nowrap}
:root[data-theme="dark"] .hd .brand__word,:root[data-theme="dark"] .tbar .brand__word{color:#fff}
:root[data-theme="dark"] .hd .brand__txt,:root[data-theme="dark"] .tbar .brand__txt{border-color:#fff}
:root[data-theme="dark"] .hd .lg-n,:root[data-theme="dark"] .tbar .lg-n{fill:#fff}
:root[data-theme="dark"] .hd .lg-ns,:root[data-theme="dark"] .tbar .lg-ns{stroke:#fff}
.brand--plate{padding:12px 16px 12px 12px;border-radius:var(--r-m);background:#fff;box-shadow:var(--sh-1)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 24px;border-radius:999px;border:1.5px solid transparent;font-weight:700;font-size:1rem;text-decoration:none;cursor:pointer;white-space:nowrap;transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease),transform .12s var(--ease)}
.btn:active{transform:scale(.98)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;pointer-events:none}
.btn--red{background:var(--red);color:#fff;box-shadow:var(--sh-red)}
.btn--red:hover{background:var(--red-h)}
.btn--ink{background:var(--h);color:var(--bg)}
.btn--ink:hover{background:var(--navy);color:#fff}
.btn--line{border-color:currentColor;color:var(--h);background:transparent}
.btn--line:hover{background:var(--h);color:var(--bg);border-color:var(--h)}
.btn--ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.22)}
.btn--ghost:hover{background:rgba(255,255,255,.16)}
.btn--wa{background:var(--navy);color:#fff;box-shadow:0 1px 2px rgba(0,48,46,.3),0 8px 20px -6px rgba(0,70,67,.5)}
.btn--wa:hover{background:#13204A}
.btn--sm{min-height:36px;padding:0 16px;font-size:.875rem}
.btn--sq{border-radius:var(--r-s)}
.btn .ic{width:18px;height:18px}

/* ---------- header ---------- */
.hd{position:sticky;top:0;z-index:60;background:var(--bg);box-shadow:0 1px 0 var(--line)}
.hd__in{display:flex;align-items:center;gap:16px;height:var(--hd);max-width:1600px;margin:0 auto;padding:0 24px}
.nav{display:flex;align-items:center;gap:4px;margin-left:16px}
.nav__a{display:inline-flex;align-items:center;gap:4px;min-height:44px;padding:0 16px;border:0;background:none;border-radius:var(--r-s);font-weight:600;font-size:1rem;color:var(--h);text-decoration:none;cursor:pointer;transition:background .15s var(--ease)}
.nav__a:hover,.nav__a[aria-expanded="true"]{background:var(--soft)}
.nav__a .ic{width:16px;height:16px;transition:transform .2s var(--ease)}
.nav__a[aria-expanded="true"] .ic{transform:rotate(180deg)}
.hd__search{flex:1;max-width:360px;margin-left:auto;display:flex;align-items:center;gap:8px;min-height:44px;padding:0 8px 0 16px;border:1.5px solid var(--line);border-radius:999px;background:var(--soft);color:var(--m);cursor:text;font-size:1rem;text-align:left;transition:border-color .15s var(--ease),background .15s var(--ease)}
.hd__search:hover{border-color:var(--m);background:var(--bg)}
.hd__search>span{flex:1}
kbd{display:inline-flex;align-items:center;min-width:24px;height:24px;padding:0 8px;border-radius:6px;border:1px solid var(--line);background:var(--bg);font-size:.75rem;color:var(--m);box-shadow:0 1px 0 var(--line)}
.hd__act{display:flex;align-items:center;gap:8px}
.icbtn{display:inline-grid;place-items:center;width:44px;height:44px;border:0;border-radius:50%;background:none;color:var(--h);cursor:pointer;transition:background .15s var(--ease)}
.icbtn:hover{background:var(--soft)}
.icbtn:active{transform:scale(.96)}
.ic-sun{display:none}
:root[data-theme="dark"] .ic-sun{display:block}
:root[data-theme="dark"] .ic-moon{display:none}
.hd__menu{display:none}

/* mega menu */
.mega{position:absolute;left:0;right:0;top:var(--hd);background:var(--bg);box-shadow:var(--sh-2);border-top:1px solid var(--line);opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s}
.mega.is-open{opacity:1;visibility:visible;transform:none}
.mega__in{display:grid;grid-template-columns:repeat(5,1fr);gap:32px;max-width:1240px;margin:0 auto;padding:32px 24px 40px}
.mega h3{display:flex;align-items:center;gap:8px;font-size:1rem;margin-bottom:8px}
.mega h3 i{width:8px;height:8px;border-radius:2px}
.mega a{display:block;padding:4px 0;color:var(--t);text-decoration:none;font-size:.9375rem}
.mega a:hover{color:var(--red)}
.mega .mega__all{margin-top:8px;font-weight:700;color:var(--h)}

/* sub nav */
.sub{position:sticky;top:var(--hd);z-index:55;background:var(--ink);height:var(--sub)}
.sub__in{display:flex;align-items:stretch;height:100%;max-width:1600px;margin:0 auto;padding:0 16px;overflow-x:auto;scrollbar-width:none}
.sub__in::-webkit-scrollbar{display:none}
.sub a{position:relative;display:flex;align-items:center;padding:0 16px;color:#D5E2DE;text-decoration:none;font-weight:600;font-size:.875rem;letter-spacing:.08em;text-transform:uppercase;white-space:nowrap;transition:color .15s,background .15s}
.sub a:hover{color:#fff;background:var(--ink-3)}
.sub a[aria-current="page"]{color:#fff;background:var(--red)}
.sub__sep{width:1px;margin:12px 8px;background:#1C4A46;flex:none}

/* ---------- search palette ---------- */
.pal{position:fixed;inset:0;z-index:300;display:none;align-items:flex-start;justify-content:center;padding:10vh 16px 16px;background:rgba(0,30,28,.55);backdrop-filter:blur(4px)}
.pal.is-open{display:flex}
.pal__box{width:100%;max-width:640px;background:var(--bg);border-radius:var(--r);box-shadow:var(--sh-2);overflow:hidden;animation:pop .18s var(--ease)}
@keyframes pop{from{opacity:0;transform:translateY(8px) scale(.98)}}
.pal__in{display:flex;align-items:center;gap:8px;padding:0 16px;border-bottom:1px solid var(--line)}
.pal__in input{flex:1;height:64px;border:0;background:none;font-size:1.125rem;outline:0}
.pal__list{max-height:min(60vh,480px);overflow:auto;padding:8px;margin:0;list-style:none}
.pal__list a{display:flex;align-items:center;gap:16px;padding:8px 16px;border-radius:var(--r-s);text-decoration:none;color:var(--h)}
.pal__list a b{font-weight:600}
.pal__list a small{display:block;color:var(--m);font-size:.8125rem}
.pal__list a[aria-selected="true"],.pal__list a:hover{background:var(--soft)}
.pal__tag{flex:none;display:grid;place-items:center;width:40px;height:40px;border-radius:var(--r-s);font:800 .6875rem/1 var(--sans);letter-spacing:.04em;color:var(--navy)}
.pal__empty{padding:32px 16px;text-align:center;color:var(--m)}
.pal__foot{display:flex;gap:16px;padding:8px 16px;border-top:1px solid var(--line);font-size:.8125rem;color:var(--m)}

/* track colours */
.t-html,.t-css,.t-js,.t-python,.t-sql,.t-tryit,.t-quiz,.t-exercises,.t-cert,.t-contact{background:var(--soft-2)}
:root[data-theme="dark"] .pal__tag{color:var(--h)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--ink);color:#fff;text-align:center;padding:96px 0 80px}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 15% 0%,rgba(240,237,229,.10),transparent 70%),radial-gradient(700px 360px at 90% 100%,rgba(46,107,102,.45),transparent 70%)}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:48px 48px;mask-image:radial-gradient(ellipse at center,#000 30%,transparent 75%);-webkit-mask-image:radial-gradient(ellipse at center,#000 30%,transparent 75%)}
.hero .wrap{position:relative;z-index:1}
.hero__eyebrow{display:inline-flex;align-items:center;gap:8px;padding:4px 16px 4px 8px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);font-size:.875rem;font-weight:600;color:#DCE7E3}
.hero__eyebrow b{padding:2px 8px;border-radius:999px;background:var(--red);color:#fff;font-size:.75rem}
.hero h1{margin:24px 0 16px;color:#fff;font-size:clamp(3rem,9vw,6rem);letter-spacing:-.04em;line-height:1}
.hero__lead{font-size:clamp(1.125rem,2.2vw,1.5625rem);font-weight:600;color:#E3ECE9}
.hero__hl{margin-top:8px;font-size:clamp(1.125rem,2.2vw,1.5625rem);font-weight:700;color:var(--yellow)}
.hero__search{display:flex;align-items:center;gap:8px;width:100%;max-width:640px;margin:40px auto 0;padding:8px 8px 8px 24px;border-radius:999px;background:#fff;color:#6E7F7B;box-shadow:0 0 0 6px rgba(255,255,255,.08),0 24px 48px -16px rgba(0,0,0,.5);border:0;cursor:text;font-size:1.125rem;text-align:left}
.hero__search>span:not(.btn){flex:1}
.hero__search .btn{pointer-events:none}
.hero__begin{display:inline-block;margin-top:24px;color:#fff;font-weight:700;text-underline-offset:4px}
.hero__begin:hover{color:var(--yellow)}
.hero__chips{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:32px}
.hero__chips a{padding:8px 16px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);color:#DCE7E3;text-decoration:none;font-weight:600;font-size:.875rem;transition:background .15s,border-color .15s}
.hero__chips a:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.3)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);max-width:880px;margin:56px auto 0;border:1px solid rgba(255,255,255,.12);border-radius:var(--r);background:rgba(255,255,255,.04);backdrop-filter:blur(6px)}
.stats div{padding:24px 16px}
.stats div+div{border-left:1px solid rgba(255,255,255,.12)}
.stats b{display:block;font-size:2rem;line-height:1;color:#fff;letter-spacing:-.03em}
.stats span{display:block;margin-top:8px;font-size:.8125rem;color:#A9C2BC;font-weight:600;text-transform:uppercase;letter-spacing:.08em}

/* ---------- track bands ---------- */
.band{padding:96px 0}
.band__grid{display:grid;grid-template-columns:1fr 1.1fr;gap:64px;align-items:center}
.band__name{font-size:clamp(3.5rem,8vw,6rem);letter-spacing:-.04em;line-height:.95}
.band__tag{margin-top:16px;font-size:1.5625rem;font-weight:600;color:var(--h);letter-spacing:-.01em}
.band__meta{display:flex;flex-wrap:wrap;gap:8px 16px;margin-top:16px;font-size:.875rem;font-weight:600;color:var(--t)}
.band__meta span{display:inline-flex;align-items:center;gap:8px}
.band__meta span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--red)}
.band__cta{display:flex;flex-wrap:wrap;gap:8px;margin-top:32px}
.band__cta .btn--red{min-width:220px;min-height:52px;font-size:1.0625rem}
.band__links{display:flex;flex-wrap:wrap;gap:8px 24px;margin-top:24px}
.band__links a{font-weight:700;color:var(--h);text-decoration:none;border-bottom:2px solid transparent;transition:border-color .15s}
.band__links a:hover{border-color:var(--red)}
.band--html{background:var(--bg)} .band--css{background:var(--soft)} .band--python{background:var(--bg)} .band--sql{background:var(--soft)}
.band--js{background:var(--ink);color:#C9D8D4}
.band--js .band__name,.band--js .band__tag,.band--js .band__links a{color:#fff}
.band--js .band__meta{color:#C9D8D4}
.band--js .btn--line{color:#fff}
.band--js .btn--line:hover{background:#fff;color:var(--ink)}
.band--rev .band__copy{order:2}

/* code window */
.cw{border-radius:var(--r);background:var(--code-bg);box-shadow:var(--sh-2);overflow:hidden;border:1px solid var(--code-line)}
.cw__bar{display:flex;align-items:center;gap:8px;padding:0 16px;height:48px;border-bottom:1px solid var(--code-line);font-weight:700;font-size:.9375rem;color:var(--h)}
.cw__dots{display:flex;gap:6px;margin-right:8px}
.cw__dots i{width:12px;height:12px;border-radius:50%;background:#DDD6C6}
.cw__dots i:nth-child(1){background:var(--red)}.cw__dots i:nth-child(2){background:var(--navy)}.cw__dots i:nth-child(3){background:var(--line)}
.cw pre{margin:0;padding:24px;overflow:auto;font-size:.9375rem;line-height:1.7;color:var(--tk-plain);tab-size:2}
.cw__foot{display:flex;justify-content:flex-start;padding:0 24px 24px}

/* ---------- generic section ---------- */
.sec{padding:96px 0}
.sec--soft{background:var(--soft)}
.sec__head{max-width:720px;margin:0 auto 48px;text-align:center}
.sec__head h2{font-size:clamp(2.4rem,5vw,3.8rem);letter-spacing:-.035em}
.sec__head p{margin-top:16px;font-size:1.25rem;color:var(--t)}
.eyebrow{display:inline-block;margin-bottom:16px;font-size:.8125rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--red)}

/* live editor on home */
.live{display:grid;grid-template-columns:1fr 1fr;border-radius:var(--r);overflow:hidden;box-shadow:var(--sh-2);border:1px solid var(--line);background:var(--bg)}
.live__bar{grid-column:1/-1;display:flex;align-items:center;gap:16px;padding:8px 8px 8px 16px;background:var(--ink);color:#fff}
.live__bar b{font-size:.9375rem}
.live__bar .btn{margin-left:auto}
.live__ed{position:relative;min-height:360px;border-right:1px solid var(--line)}
.live__out{min-height:360px;background:#fff}
.live__out iframe{display:block;width:100%;height:100%;min-height:360px;border:0;background:#fff}

/* editor (shared with tryit) */
.ed{position:relative;height:100%;background:var(--code-bg);overflow:hidden}
.ed__hl,.ed__ta{position:absolute;inset:0;margin:0;padding:16px 16px 16px 64px;border:0;font:400 .9375rem/1.7 var(--mono);white-space:pre;overflow:auto;tab-size:2;letter-spacing:0;word-spacing:0}
.ed__hl{pointer-events:none;color:var(--tk-plain)}
.ed__ta{resize:none;color:transparent;background:transparent;caret-color:var(--h);outline:0;-webkit-text-fill-color:transparent}
.ed__ta::selection{background:rgba(46,107,102,.3);-webkit-text-fill-color:transparent}
.ed__gut{position:absolute;white-space:pre;left:0;top:0;bottom:0;width:48px;padding:16px 8px 0 0;text-align:right;font:400 .9375rem/1.7 var(--mono);color:var(--m);background:var(--soft);border-right:1px solid var(--line);overflow:hidden;user-select:none}

/* practice cards */
.cards{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.pcard{display:flex;flex-direction:column;padding:24px;border-radius:var(--r);background:var(--bg);box-shadow:var(--sh-1);border:1px solid var(--line);transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.pcard:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.pcard__ic{display:grid;place-items:center;width:48px;height:48px;border-radius:var(--r-m);font:800 .8125rem/1 var(--sans);color:var(--navy)}
:root[data-theme="dark"] .pcard__ic{color:var(--h)}
.pcard h3{margin-top:16px;font-size:1.25rem}
.pcard p{margin-top:8px;font-size:.875rem;color:var(--m)}
.pcard__links{display:grid;gap:8px;margin-top:auto;padding-top:24px}

/* learning path */
.path{display:grid;grid-template-columns:repeat(5,1fr);gap:0;counter-reset:s;position:relative}
.path::before{content:"";position:absolute;left:10%;right:10%;top:32px;height:2px;background:repeating-linear-gradient(90deg,var(--line) 0 8px,transparent 8px 16px)}
.path a{position:relative;display:flex;flex-direction:column;align-items:center;text-align:center;padding:0 8px;text-decoration:none;counter-increment:s}
.path__dot{display:grid;place-items:center;width:64px;height:64px;border-radius:50%;background:var(--bg);border:2px solid var(--line);font-weight:800;color:var(--h);box-shadow:var(--sh-1);transition:border-color .2s,transform .2s var(--ease)}
.path a:hover .path__dot{border-color:var(--red);transform:translateY(-4px)}
.path__dot::before{content:counter(s)}
.path b{margin-top:16px;font-size:1.125rem;color:var(--h)}
.path small{margin-top:4px;color:var(--m);font-size:.875rem;max-width:180px}

/* certificate */
.cert{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.cert__list{display:grid;gap:16px;margin:32px 0;padding:0;list-style:none}
.cert__list li{display:flex;gap:16px;align-items:flex-start;font-size:1.0625rem;color:var(--h);font-weight:600}
.cert__list li span{display:block;font-weight:400;color:var(--t);font-size:.9375rem}
.tick{flex:none;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--ok-soft);color:var(--ok)}
.tick .ic{width:16px;height:16px;stroke-width:3}
.trust{display:flex;align-items:center;gap:8px;margin-top:16px;font-size:.875rem;color:var(--m)}
.trust .ic{width:16px;height:16px;color:var(--ok)}
.certcard{position:relative;aspect-ratio:1.414;padding:40px;border-radius:var(--r-m);background:#fff;color:var(--cy);box-shadow:var(--sh-2);transform:rotate(-2deg);text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;overflow:hidden}
.certcard::before{content:"";position:absolute;inset:12px;border:2px solid var(--cy);border-radius:6px;outline:1px solid rgba(0,70,67,.3);outline-offset:-8px}
.certcard .brand{transform:scale(.9)}
.certcard .brand__word{color:var(--logo-n)}
.certcard .brand__txt{border-color:var(--logo-n)}
.certcard .lg-n{fill:var(--logo-n)}.certcard .lg-ns{stroke:var(--logo-n)}
.certcard__k{margin-top:16px;font-size:.75rem;font-weight:800;letter-spacing:.2em;text-transform:uppercase;color:var(--cy)}
.certcard__n{margin-top:8px;font-size:clamp(1.5rem,3vw,2.2rem);font-weight:800;letter-spacing:-.02em;font-style:italic;color:var(--cy)}
.certcard__c{margin-top:8px;font-size:.875rem;color:#3B4F4C}
.certcard__seal{position:absolute;right:32px;bottom:28px;display:grid;place-items:center;width:72px;height:72px;border-radius:50%;background:var(--cy);color:#fff;font:800 .625rem/1.2 var(--sans);letter-spacing:.08em;text-transform:uppercase;box-shadow:0 0 0 4px #fff,0 0 0 6px var(--cy)}
.certcard__sig{position:absolute;left:40px;bottom:32px;text-align:left;font-size:.6875rem;color:#3B4F4C;border-top:1px solid var(--cy);padding-top:4px;min-width:120px}
.certcard__tag{position:absolute;top:24px;right:24px;padding:2px 8px;border-radius:4px;background:var(--cy);color:#fff;font-size:.625rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase}

/* contact band */
.cta{position:relative;overflow:hidden;padding:80px 0;background:var(--navy);color:#DCE7E3}
.cta::before{content:"";position:absolute;inset:0;background:radial-gradient(500px 260px at 85% 20%,rgba(240,237,229,.12),transparent 70%)}
.cta .wrap{position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta h2{color:#fff;font-size:clamp(2rem,4vw,3rem)}
.cta p{margin-top:8px;font-size:1.125rem}
.cta__btns{display:flex;flex-wrap:wrap;gap:8px}
.cta__num{display:block;margin-top:16px;font-size:1.5625rem;font-weight:800;color:#fff;text-decoration:none;letter-spacing:-.01em}

/* footer */
.ft{background:var(--ink);color:#A9C2BC;padding:72px 0 32px;font-size:.9375rem}
.ft__grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:40px}
.ft h3{color:#fff;font-size:.8125rem;letter-spacing:.12em;text-transform:uppercase;margin-bottom:16px}
.ft ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.ft a{color:#A9C2BC;text-decoration:none}
.ft a:hover{color:#fff}
.ft__about{margin-top:24px;max-width:320px;line-height:1.7}
.ft__bot{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;margin-top:56px;padding-top:24px;border-top:1px solid #134340;font-size:.8125rem}
.ft__word{margin-top:48px;font:900 clamp(4rem,16vw,13rem)/.8 "Montserrat",var(--sans);letter-spacing:-.02em;color:transparent;-webkit-text-stroke:1px #1C4A46;text-align:center;user-select:none}

/* floating WhatsApp */
.wa-fab{position:fixed;right:max(16px,env(safe-area-inset-right));bottom:max(16px,env(safe-area-inset-bottom));z-index:90;display:grid;place-items:center;width:56px;height:56px;border-radius:50%;background:var(--red);color:#fff;box-shadow:0 1px 2px rgba(0,48,46,.3),0 12px 28px -8px rgba(0,70,67,.55);transition:transform .2s var(--ease)}
.wa-fab:hover{transform:scale(1.06)}
.wa-fab svg{width:28px;height:28px;fill:#fff}

/* ---------- tutorial page ---------- */
.tut{display:grid;grid-template-columns:264px minmax(0,1fr) 248px;max-width:1600px;margin:0 auto;min-height:calc(100vh - var(--hd) - var(--sub))}
.side{position:sticky;top:calc(var(--hd) + var(--sub));height:calc(100vh - var(--hd) - var(--sub));overflow:auto;background:var(--soft);border-right:1px solid var(--line);padding:24px 0 40px;scrollbar-width:thin}
.side__h{padding:0 24px;font-size:1.25rem}
.side__prog{margin:16px 24px 16px;font-size:.8125rem;color:var(--m);font-weight:600}
.bar{height:6px;margin-top:8px;border-radius:999px;background:var(--soft-2);overflow:hidden}
.bar i{display:block;height:100%;width:0;border-radius:inherit;background:linear-gradient(90deg,var(--red),#2E6B66);transition:width .4s var(--ease)}
.side ol{list-style:none;margin:0;padding:0}
.side a{display:flex;align-items:center;gap:8px;min-height:40px;padding:4px 24px;color:var(--t);text-decoration:none;font-size:.9375rem;border-left:3px solid transparent;transition:background .15s}
.side a:hover{background:var(--soft-2);color:var(--h)}
.side a[aria-current="page"]{background:var(--bg);border-left-color:var(--red);color:var(--h);font-weight:700}
.side a .chk{flex:none;display:grid;place-items:center;width:18px;height:18px;margin-left:auto;border-radius:50%;border:1.5px solid var(--line);color:transparent}
.side a.done .chk{background:var(--ok);border-color:var(--ok);color:#fff}
.side a .chk .ic{width:12px;height:12px;stroke-width:3.5}
.side__other{margin-top:24px;padding:16px 24px 0;border-top:1px solid var(--line)}
.side__other h3{font-size:.75rem;letter-spacing:.12em;text-transform:uppercase;color:var(--m);margin-bottom:8px}
.side__other a{padding:4px 0;min-height:36px;border:0}

.main{padding:40px 56px 96px;min-width:0}
.crumb{display:flex;flex-wrap:wrap;gap:8px;font-size:.875rem;color:var(--m)}
.crumb a{color:var(--m);text-decoration:none}
.crumb a:hover{color:var(--red)}
.main h1{margin-top:16px;font-size:clamp(2.2rem,4.5vw,3rem);letter-spacing:-.035em}
.main h1 span{color:var(--red)}
.lmeta{display:flex;flex-wrap:wrap;gap:16px;margin-top:16px;font-size:.875rem;color:var(--m);font-weight:600}
.pn{display:flex;justify-content:space-between;gap:8px;margin:32px 0}
.pn .btn{min-width:120px}
.pn--bot{margin-top:56px;padding-top:32px;border-top:1px solid var(--line)}
.prose{max-width:760px;font-size:1.0625rem}
.prose>*+*{margin-top:16px}
.prose h2{margin-top:48px;padding-top:32px;border-top:1px solid var(--line);font-size:1.75rem}
.prose ul,.prose ol{padding-left:24px}
.prose li+li{margin-top:8px}
.prose li::marker{color:var(--red)}
.prose code{padding:2px 6px;border-radius:6px;background:var(--soft-2);color:var(--tk-attr);font-size:.875em;white-space:nowrap}
.prose a:not(.btn){color:var(--red);font-weight:600}
.prose table{width:100%;border-collapse:collapse;font-size:.9375rem;border-radius:var(--r-m);overflow:hidden;box-shadow:0 0 0 1px var(--line)}
.prose th{background:var(--soft);color:var(--h);text-align:left;font-weight:700}
.prose th,.prose td{padding:12px 16px;border-bottom:1px solid var(--line);vertical-align:top}
.prose tr:last-child td{border-bottom:0}
.tblwrap{overflow-x:auto;border-radius:var(--r-m)}

/* example box */
.ex{margin-top:24px;padding:24px;border-radius:var(--r);background:var(--soft);border:1px solid var(--line)}
.ex__h{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:16px}
.ex__h h3{font-size:1.25rem}
.code{position:relative;border-radius:var(--r-m);background:var(--code-bg);border:1px solid var(--code-line);border-left:4px solid var(--red);overflow:hidden}
.code pre{margin:0;padding:16px 24px;overflow-x:auto;font-size:.9375rem;line-height:1.7;color:var(--tk-plain);tab-size:2}
.code__copy{position:absolute;top:8px;right:8px;display:inline-flex;align-items:center;gap:4px;min-height:32px;padding:0 8px;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--m);font-size:.75rem;font-weight:700;cursor:pointer;opacity:0;transition:opacity .15s,color .15s}
.code:hover .code__copy,.code__copy:focus-visible{opacity:1}
.code__copy:hover{color:var(--h)}
.code__copy .ic{width:14px;height:14px}
.ex__try{margin-top:16px}
.out{margin-top:16px}
.out__h{font-size:.75rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--m);margin-bottom:8px}
.out pre{margin:0;padding:16px 24px;border-radius:var(--r-m);background:#00302E;color:#E6EDEA;font-size:.9375rem;line-height:1.7;overflow-x:auto}
.out table{font-family:var(--mono);font-size:.875rem;background:var(--bg)}
.out__msg{padding:12px 16px;border-radius:var(--r-m);background:var(--ok-soft);color:var(--ok);font-weight:700;font-family:var(--mono);font-size:.875rem}

.call{display:flex;gap:16px;padding:16px 24px;border-radius:var(--r-m);border-left:4px solid}
.call__ic{flex:none;font-weight:800;font-size:.75rem;letter-spacing:.1em;text-transform:uppercase;padding-top:4px}
.call--note{background:var(--sky);border-color:var(--navy)} .call--note .call__ic{color:var(--navy)}
.call--tip{background:var(--soft);border-color:var(--navy)} .call--tip .call__ic{color:var(--navy)}
.call--warn{background:var(--rose);border-color:var(--red)} .call--warn .call__ic{color:var(--red)}
:root[data-theme="dark"] .call--note .call__ic{color:#7FC4BA}
:root[data-theme="dark"] .call--note{border-color:#7FC4BA}

/* structure diagram */
.struct{padding:16px;border-radius:var(--r-m);background:var(--soft);border:1px solid var(--line);font-family:var(--mono);font-size:.875rem;color:var(--h)}
.struct div{margin-top:8px;padding:8px 16px;border-radius:var(--r-s);border:1.5px solid var(--line);background:var(--bg)}
.struct>div{margin:0}
.struct .s-body{background:var(--red-soft);border-color:#D8CBB0}
.struct .s-head{background:var(--sky)}
.struct span{color:var(--m)}
.boxm{display:grid;place-items:center;padding:24px;border-radius:var(--r-m);background:var(--rose);border:2px dashed #D8CBB0;font-size:.8125rem;font-weight:700;color:var(--h);text-align:center}
.boxm>div{width:100%;padding:16px 24px 24px;background:var(--navy);color:#fff;border-radius:6px}
.boxm>div>div{padding:16px 24px 24px;background:var(--soft-2);color:var(--h);border-radius:4px;margin-top:8px}
.boxm>div>div>div{padding:16px;background:var(--bg);border:1px solid var(--line);border-radius:4px;margin-top:8px}

/* exercise */
.xbox{margin-top:56px;padding:32px;border-radius:var(--r);background:linear-gradient(180deg,var(--soft),var(--bg));border:1px solid var(--line);box-shadow:var(--sh-1)}
.xbox__k{font-size:.8125rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--red)}
.xbox h2{margin-top:8px;font-size:1.5625rem;border:0;padding:0}
.xbox__q{margin-top:8px;color:var(--t)}
.xcode{margin-top:16px;padding:16px 24px;border-radius:var(--r-m);background:var(--code-bg);border:1px solid var(--code-line);font:400 1rem/2.2 var(--mono);color:var(--tk-plain);white-space:pre-wrap;overflow-x:auto}
.xcode input{width:var(--w,6ch);min-width:3ch;height:36px;padding:0 8px;margin:0 2px;border:2px solid var(--line);border-radius:6px;background:var(--bg);font:600 16px var(--mono);color:var(--h);text-align:center;transition:border-color .15s,background .15s}
.xcode input:focus{outline:0;border-color:#2E6B66}
.xcode input.ok{border-color:var(--ok);background:var(--ok-soft)}
.xcode input.bad{border-color:var(--red);background:var(--red-soft);animation:shake .3s}
@keyframes shake{25%{transform:translateX(-3px)}75%{transform:translateX(3px)}}
.xbox__act{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:16px}
.xbox__fb{font-weight:700;font-size:.9375rem}
.xbox__fb.ok{color:var(--ok)} .xbox__fb.bad{color:var(--red)}

.done-row{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:40px;padding:24px;border-radius:var(--r);border:1.5px dashed var(--line)}
.done-row p{flex:1;min-width:200px;color:var(--t)}
.btn--done{background:var(--ok);color:#fff}
.btn--done .ic{stroke-width:3}

.rail{position:sticky;top:calc(var(--hd) + var(--sub));height:calc(100vh - var(--hd) - var(--sub));overflow:auto;padding:40px 24px 40px 0}
.toc h3{font-size:.75rem;letter-spacing:.12em;text-transform:uppercase;color:var(--m);margin-bottom:8px}
.toc ol{list-style:none;margin:0;padding:0;border-left:2px solid var(--line)}
.toc a{display:block;margin-left:-2px;padding:4px 0 4px 16px;border-left:2px solid transparent;font-size:.875rem;color:var(--m);text-decoration:none;transition:color .15s,border-color .15s}
.toc a:hover{color:var(--h)}
.toc a.is-on{color:var(--red);border-color:var(--red);font-weight:700}
.rcard{margin-top:32px;padding:24px;border-radius:var(--r);background:var(--ink);color:#C9D8D4;font-size:.875rem;position:relative;overflow:hidden}
.rcard::before{content:"";position:absolute;inset:0;background:radial-gradient(200px 140px at 100% 0%,rgba(240,237,229,.14),transparent 70%)}
.rcard>*{position:relative}
.rcard b{display:block;color:#fff;font-size:1.125rem;line-height:1.3;margin-bottom:8px}
.rcard .btn{margin-top:16px;width:100%}

.mbar{display:none}

/* ---------- try it ---------- */
.tbody{height:100vh;height:100dvh;display:flex;flex-direction:column;overflow:hidden;background:var(--bg)}
.tbar{display:flex;align-items:center;gap:8px;height:56px;padding:0 8px 0 16px;background:var(--bg);border-bottom:1px solid var(--line);flex:none}
.tbar .brand__mark{width:32px;height:32px}
.tbar .brand__word{font-size:1.1rem}
.tbar__t{margin-left:8px;font-weight:700;color:var(--h);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tbar__sp{flex:1}
.tpanes{flex:1;display:flex;min-height:0}
.tpanes.is-v{flex-direction:column}
.tpane{position:relative;min-width:0;min-height:0;display:flex;flex-direction:column}
.tpane__h{display:flex;align-items:center;justify-content:space-between;gap:8px;height:40px;padding:0 16px;background:var(--soft);border-bottom:1px solid var(--line);font-size:.75rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--m);flex:none}
.tpane__b{position:relative;flex:1;min-height:0}
.tpane iframe{position:absolute;inset:0;width:100%;height:100%;border:0;background:#fff}
.tsplit{flex:none;width:8px;background:var(--soft-2);cursor:col-resize;border-left:1px solid var(--line);border-right:1px solid var(--line);transition:background .15s;touch-action:none}
.tsplit:hover,.tsplit.is-drag{background:#2E6B66}
.tpanes.is-v .tsplit{width:auto;height:8px;cursor:row-resize;border:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.tpanes.is-drag iframe{pointer-events:none}
.ttabs{display:none}

/* ---------- quiz / exercises ---------- */
.qwrap{max-width:760px;margin:0 auto;padding:56px 24px 96px}
.qhead h1{font-size:clamp(2.2rem,5vw,3.4rem);letter-spacing:-.035em}
.qhead h1 span{color:var(--red)}
.qhead p{margin-top:8px;font-size:1.125rem}
.seg{display:flex;flex-wrap:wrap;gap:8px;margin:32px 0}
.seg a{display:inline-flex;align-items:center;min-height:44px;padding:0 16px;border-radius:999px;border:1.5px solid var(--line);color:var(--h);text-decoration:none;font-weight:700;font-size:.9375rem;transition:border-color .15s,background .15s}
.seg a:hover{border-color:var(--h)}
.seg a[aria-current="page"]{background:var(--h);border-color:var(--h);color:var(--bg)}
.qcard{padding:40px;border-radius:var(--r);background:var(--bg);border:1px solid var(--line);box-shadow:var(--sh-2)}
.qtop{display:flex;justify-content:space-between;align-items:center;font-size:.875rem;font-weight:700;color:var(--m)}
.qcard .bar{margin:16px 0 32px}
.qq{font-size:1.5625rem;line-height:1.35}
.qq code,.qopt code{padding:2px 6px;border-radius:6px;background:var(--soft-2);color:var(--tk-attr);font-size:.875em}
.qopts{display:grid;gap:8px;margin-top:24px}
.qopt{display:flex;align-items:center;gap:16px;width:100%;min-height:56px;padding:12px 16px;border:1.5px solid var(--line);border-radius:var(--r-m);background:var(--bg);text-align:left;cursor:pointer;font-weight:600;color:var(--h);transition:border-color .15s,background .15s,transform .12s}
.qopt:hover:not(:disabled){border-color:var(--h);background:var(--soft)}
.qopt:active:not(:disabled){transform:scale(.99)}
.qopt i{flex:none;display:grid;place-items:center;width:32px;height:32px;border-radius:var(--r-s);background:var(--soft-2);font-style:normal;font-size:.8125rem;font-weight:800}
.qopt.is-ok{border-color:var(--ok);background:var(--ok-soft)}
.qopt.is-ok i{background:var(--ok);color:#fff}
.qopt.is-bad{border-color:var(--red);background:var(--red-soft)}
.qopt.is-bad i{background:var(--red);color:#fff}
.qopt:disabled{cursor:default}
.qexp{margin-top:24px;padding:16px 24px;border-radius:var(--r-m);background:var(--soft);font-size:.9375rem}
.qnav{display:flex;justify-content:flex-end;margin-top:24px}
.qres{text-align:center}
.ring{position:relative;width:160px;height:160px;margin:0 auto 24px}
.ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:12}
.ring .r-bg{stroke:var(--soft-2)} .ring .r-fg{stroke:var(--red);stroke-linecap:round;transition:stroke-dashoffset 1s var(--ease)}
.ring b{position:absolute;inset:0;display:grid;place-items:center;font-size:2.4rem;color:var(--h);letter-spacing:-.03em}
.qres h2{font-size:2rem}
.qres p{margin-top:8px}
.qres__act{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:32px}
.qrev{margin-top:40px;text-align:left;display:grid;gap:8px}
.qrev div{padding:16px;border-radius:var(--r-m);background:var(--soft);font-size:.9375rem}
.qrev div b{color:var(--h)}
.qrev .y{color:var(--ok);font-weight:700}.qrev .n{color:var(--red);font-weight:700}

/* 404 */
.nf{min-height:70vh;display:grid;place-items:center;text-align:center;padding:64px 24px}
.nf b{display:block;font:900 clamp(6rem,20vw,12rem)/1 "Montserrat",var(--sans);color:transparent;-webkit-text-stroke:2px var(--navy);letter-spacing:-.04em}
:root[data-theme="dark"] .nf b{-webkit-text-stroke-color:#7FC4BA}
.nf h1{margin-top:16px;font-size:2rem}
.nf p{margin:16px auto 32px;max-width:420px}

/* ---------- syntax tokens ---------- */
.tk-tag{color:var(--tk-tag)} .tk-attr{color:var(--tk-attr)} .tk-str{color:var(--tk-str)} .tk-com{color:var(--tk-com);font-style:italic}
.tk-kw{color:var(--tk-kw)} .tk-num{color:var(--tk-num)} .tk-fn{color:var(--tk-fn)} .tk-pun{color:var(--m)} .tk-prop{color:var(--tk-attr)} .tk-sel{color:var(--tk-tag);font-weight:600}

/* ---------- reveal (motion tier) ---------- */
@media (prefers-reduced-motion:no-preference){
  .rv{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
  .rv.is-in{opacity:1;transform:none}
}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .tut{grid-template-columns:248px minmax(0,1fr)}
  .rail{display:none}
  .cards{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:1080px){
  .nav,.hd__search span,.hd__search kbd{display:none}
  .hd__search{flex:none;width:44px;max-width:none;padding:0;justify-content:center;border:0;background:none;color:var(--h)}
  .hd__search:hover{background:var(--soft)}
  .hd__menu{display:inline-grid}
  .hd__cert{display:none}
  .hd__act{margin-left:auto}
  .hd__search{margin-left:auto}
  .mega{position:fixed;top:var(--hd);bottom:0;overflow:auto}
  .mega__in{grid-template-columns:1fr 1fr;gap:24px}
  .mega__nav{display:grid!important}
  .band__grid,.cert{grid-template-columns:1fr;gap:40px}
  .band--rev .band__copy{order:0}
  .ft__grid{grid-template-columns:1fr 1fr}
  .ft__grid>div:first-child{grid-column:1/-1}
  .path{grid-template-columns:1fr;gap:16px}
  .path::before{left:31px;right:auto;top:32px;bottom:32px;width:2px;height:auto;background:repeating-linear-gradient(180deg,var(--line) 0 8px,transparent 8px 16px)}
  .path a{flex-direction:row;text-align:left;gap:16px;padding:0}
  .path b{margin:0}
  .path a>span{display:flex;flex-direction:column}
  .path small{max-width:none}
}
.mega__nav{display:none;grid-column:1/-1;gap:0;border-bottom:1px solid var(--line);padding-bottom:16px}
.mega__nav a{padding:12px 0;font-weight:700;color:var(--h);font-size:1.0625rem}
@media (max-width:860px){
  .tut{grid-template-columns:1fr}
  .side{position:fixed;left:0;top:0;bottom:0;z-index:250;width:min(320px,86vw);height:100%;transform:translateX(-100%);transition:transform .25s var(--ease);box-shadow:var(--sh-2);padding-top:24px}
  .side.is-open{transform:none}
  .scrim{position:fixed;inset:0;z-index:240;background:rgba(0,30,28,.5);opacity:0;visibility:hidden;transition:opacity .2s,visibility .2s}
  .scrim.is-on{opacity:1;visibility:visible}
  .mbar{position:sticky;top:calc(var(--hd) + var(--sub));z-index:50;display:flex;align-items:center;gap:8px;width:100%;min-height:48px;padding:0 16px;border:0;border-bottom:1px solid var(--line);background:var(--soft);color:var(--h);font-weight:700;font-size:.9375rem;cursor:pointer;text-align:left}
  .mbar span{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .mbar small{color:var(--m);font-weight:600}
  .main{padding:24px 16px 80px}
  .live{grid-template-columns:1fr}
  .live__ed{border-right:0;border-bottom:1px solid var(--line);min-height:280px}
  .live__out,.live__out iframe{min-height:280px}
}
@media (max-width:720px){
  :root{--hd:56px;--sub:44px}
  .wrap{padding:0 16px}
  .hd__in{padding:0 8px 0 16px;gap:4px}
  .brand__mark{width:34px;height:34px}
  .brand__word{font-size:1.15rem}
  .hero{padding:64px 0 56px}
  .hero__search{margin-top:32px;padding:4px 4px 4px 16px;font-size:1rem}
  .hero__search .btn{padding:0 16px}
  .stats{grid-template-columns:1fr 1fr}
  .stats div:nth-child(3){border-left:0}
  .stats div:nth-child(n+3){border-top:1px solid rgba(255,255,255,.12)}
  .band,.sec{padding:64px 0}
  .band__tag{font-size:1.25rem}
  .band__cta .btn{flex:1}
  .cw pre{padding:16px;font-size:.8125rem}
  .cards{grid-template-columns:1fr 1fr}
  .cards .pcard:last-child{grid-column:1/-1}
  .certcard{padding:24px;transform:none}
  .certcard__seal{width:56px;height:56px;right:20px;bottom:20px;font-size:.5rem}
  .certcard__sig{left:24px;bottom:24px;min-width:96px}
  .ft__grid{grid-template-columns:1fr 1fr;gap:32px 16px}
  .ex{padding:16px;margin-left:-4px;margin-right:-4px}
  .code pre{padding:16px;font-size:.8125rem}
  .prose{font-size:1rem}
  .prose h2{font-size:1.5rem}
  .xbox{padding:24px 16px}
  .xcode{padding:16px;font-size:.875rem}
  .pn .btn{min-width:0;flex:1}
  .qcard{padding:24px 16px}
  .qq{font-size:1.25rem}
  .sub a{padding:0 12px;font-size:.8125rem}
  .tbar__t,.tbar .brand__txt{display:none}
  .tpanes .tsplit{display:none}
  .ttabs{display:flex;flex:none;border-bottom:1px solid var(--line);background:var(--soft)}
  .ttabs button{flex:1;min-height:44px;border:0;background:none;font-weight:700;color:var(--m);border-bottom:2px solid transparent;cursor:pointer}
  .ttabs button[aria-selected="true"]{color:var(--h);border-color:var(--red)}
  .tpanes{flex-direction:column}
  .tpanes .tpane{flex:1!important}
  .tpanes .tpane[hidden]{display:none}
  .wa-fab{width:52px;height:52px}
}
@media (max-width:400px){
  .cards{grid-template-columns:1fr}
  .stats b{font-size:1.6rem}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important}
}
@media print{.hd,.sub,.side,.rail,.wa-fab,.mbar,.pn,.xbox,.done-row,.ft{display:none!important}.tut{display:block}}
.live__ed .ed{position:absolute;inset:0}
/* touch: tap targets + hover-only fallbacks */
.prose code{white-space:normal;overflow-wrap:anywhere}
.crumb a,.band__links a,.qtop a,.hero__begin{display:inline-flex;align-items:center;min-height:44px}
.crumb{align-items:center;gap:0 8px}
.main h1{margin-top:8px}
@media (hover:none){.code__copy{opacity:1}}
@media (max-width:720px){.btn--sm{min-height:44px}.hero__begin{margin-top:16px}}
.path a>span:not(.path__dot){display:flex;flex-direction:column;align-items:center}
.cta .btn--wa{background:var(--red);box-shadow:var(--sh-red)}
.cta .btn--wa:hover{background:var(--red-h)}
@media (max-width:1080px){.path a>span:not(.path__dot){align-items:flex-start}}

/* ---------- Sand + Cyprus roles ---------- */
.sub a[aria-current="page"]{background:var(--sand);color:var(--cy)}
.hero__eyebrow b{background:var(--sand);color:var(--cy)}
.hero__search{background:var(--paper);color:var(--m)}
.cw__dots i:nth-child(2){background:var(--cy-m)}
.pcard,.qcard,.cw,.live,.pal__box,.xbox{background:var(--paper)}
.side a[aria-current="page"]{background:var(--paper)}
.certcard{background:var(--paper)}
.certcard__seal{box-shadow:0 0 0 4px var(--paper),0 0 0 6px var(--cy)}
.eyebrow,.xbox__k{color:var(--cy-m)}
.main h1 span,.qhead h1 span{color:var(--cy-m)}
/* wrong / careful = deep sand (bronze), never a third hue */
.call--warn{border-color:var(--bronze)} .call--warn .call__ic{color:var(--bronze)}
.xcode input.bad,.qopt.is-bad{border-color:var(--bronze);background:var(--red-soft)}
.qopt.is-bad i{background:var(--bronze)}
.xbox__fb.bad,.qrev .n{color:var(--bronze)}
.prose code,.qq code,.qopt code{color:var(--cy)}
/* dark band buttons */
.band--js .btn--red,.cta .btn--wa,.rcard .btn--wa{background:var(--sand);color:var(--cy);box-shadow:0 1px 2px rgba(0,0,0,.2),0 8px 20px -8px rgba(0,0,0,.5)}
.band--js .btn--red:hover,.cta .btn--wa:hover,.rcard .btn--wa:hover{background:#fff}
.cta .btn--wa svg,.rcard .btn--wa svg{fill:var(--cy)!important}
.band--js .cw .btn--red{background:var(--cy);color:#fff}
:root[data-theme="dark"] .sub a[aria-current="page"]{background:var(--sand);color:#00302E}
:root[data-theme="dark"] .certcard{background:#FAF8F3}
.live__bar .btn--red{background:var(--sand);color:var(--cy);box-shadow:none}
.live__bar .btn--red:hover{background:#fff}
.wa-fab{box-shadow:0 0 0 3px var(--sand),0 12px 28px -8px rgba(0,48,46,.6)}