/* Kinetic: skating page (based on the scuba stylesheet) */
:root{
  --ink:#0b1f2e; --ink-2:#2d4354; --muted:#5d7180;
  --sea-900:#041726; --sea-800:#06243a; --sea-700:#0a3554; --sea-500:#0f6e8c;
  --teal:#11b5a4; --teal-soft:#d8f3ef; --coral:#ff6b4a; --coral-soft:#ffe7e0;
  --sand:#f7f4ee; --card:#ffffff; --line:#e4e0d6; --ok:#14866d; --bad:#c2412d;
  --radius:16px; --shadow:0 1px 2px rgba(4,23,38,.06),0 8px 24px rgba(4,23,38,.06);
  --serif:"Fraunces",Georgia,serif; --sans:"Inter",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --nav-h:60px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px)}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--sand);line-height:1.62;font-size:17px;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%}
a{color:var(--sea-500);text-underline-offset:3px}
a:hover{color:var(--coral)}
h1,h2,h3,h4{font-family:var(--serif);line-height:1.15;letter-spacing:-.01em;margin:0 0 .5em}
h2{font-size:clamp(1.9rem,3.6vw,2.7rem)}
h3{font-size:clamp(1.3rem,2.3vw,1.65rem)}
h4{font-size:1.1rem;font-family:var(--sans);font-weight:700;letter-spacing:0}
p{margin:0 0 1em}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.narrow{max-width:780px}
.mono{font-family:var(--mono);font-size:.92em}
.eyebrow{font-family:var(--mono);font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--teal);margin-bottom:.8em;display:block}
.muted{color:var(--muted)}
.small{font-size:.86rem}

/* ---------- NAV ---------- */
.topbar{position:sticky;top:0;z-index:50;background:rgba(4,23,38,.92);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid rgba(255,255,255,.08)}
.topbar .wrap{display:flex;align-items:center;gap:22px;height:var(--nav-h)}
.wordmark{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;flex-shrink:0}
.wordmark:hover{color:#fff}
.wordmark svg{width:30px;height:30px}
.wordmark .wm-text{font-family:var(--sans);font-weight:800;font-size:1.32rem;letter-spacing:-.04em}
.wordmark .wm-text b{color:var(--teal);font-weight:800}
.wordmark .wm-sub{font-family:var(--mono);font-size:.62rem;letter-spacing:.16em;text-transform:uppercase;color:#8fb3c6;border-left:1px solid rgba(255,255,255,.2);padding-left:10px;margin-left:2px}
.sectionnav{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;margin-left:auto;-webkit-overflow-scrolling:touch}
.sectionnav::-webkit-scrollbar{display:none}
.sectionnav a{color:#c7dbe6;text-decoration:none;font-size:.88rem;font-weight:500;padding:7px 12px;border-radius:999px;white-space:nowrap;transition:background .2s,color .2s}
.sectionnav a:hover{color:#fff;background:rgba(255,255,255,.08)}
.sectionnav a.active{color:var(--sea-900);background:var(--teal)}

/* ---------- HERO ---------- */
.hero{background:radial-gradient(1200px 500px at 80% -10%,#0f6e8c 0%,transparent 60%),linear-gradient(180deg,var(--sea-800),var(--sea-900));color:#eaf4f8;padding:72px 0 64px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:auto 0 0 0;height:80px;background:linear-gradient(180deg,transparent,rgba(4,23,38,.6))}
.hero .wrap{position:relative;z-index:1;display:grid;grid-template-columns:1.3fr .9fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(2.3rem,5.4vw,4rem);color:#fff;font-weight:600}
.hero h1 em{font-style:italic;color:var(--teal)}
.hero p.lede{font-size:1.15rem;color:#bcd3df;max-width:40ch}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
.btn{display:inline-flex;align-items:center;gap:8px;border:0;cursor:pointer;font:600 1rem var(--sans);padding:13px 22px;border-radius:999px;text-decoration:none;transition:transform .15s,box-shadow .15s,background .2s}
.btn-primary{background:var(--coral);color:#fff;box-shadow:0 6px 20px rgba(255,107,74,.35)}
.btn-primary:hover{color:#fff;transform:translateY(-1px)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.2)}
.btn-ghost:hover{color:#fff;background:rgba(255,255,255,.14)}
.btn-dark{background:var(--sea-800);color:#fff}
.btn-dark:hover{color:#fff;background:var(--sea-700)}
.hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.hero-stat{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:16px}
.hero-stat .n{font-family:var(--mono);font-size:1.7rem;color:#fff;font-weight:600;display:block}
.hero-stat .l{font-size:.85rem;color:#9dbccb}
.depthgauge{margin-top:28px;display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:.78rem;color:#8fb3c6}
.depthgauge .bar{flex:1;height:6px;border-radius:6px;background:linear-gradient(90deg,#ff5a3c 0%,#ff9a3c 15%,#f3d34a 35%,#4fd18b 55%,#2aa7d6 75%,#1b4fa8 100%)}

/* ---------- SECTIONS ---------- */
section.block{padding:84px 0;border-bottom:1px solid var(--line)}
section.block.alt{background:#fff}
section.block.dark{background:var(--sea-900);color:#dceaf1;border-bottom-color:#0d2c44}
section.block.dark h2,section.block.dark h3{color:#fff}
.section-head{max-width:760px;margin-bottom:40px}
.section-head p{font-size:1.08rem;color:var(--ink-2)}
.dark .section-head p{color:#a9c4d2}
.callout{border-radius:var(--radius);padding:18px 20px;margin:20px 0;background:var(--teal-soft);border-left:4px solid var(--teal)}
.callout.warn{background:var(--coral-soft);border-left-color:var(--coral)}
.callout.note{background:#f1efe8;border-left-color:#b9b19a}
.callout h4{margin-bottom:.35em}
.callout p:last-child{margin-bottom:0}

/* ---------- QUIZ ---------- */
.quiz-shell{display:grid;grid-template-columns:260px 1fr;gap:28px;align-items:start}
.quiz-side{position:sticky;top:calc(var(--nav-h) + 20px);background:var(--sea-800);color:#d4e6ef;border-radius:var(--radius);padding:22px}
.quiz-side h4{color:#fff}
.progress{height:8px;border-radius:8px;background:rgba(255,255,255,.12);overflow:hidden;margin:10px 0 6px}
.progress span{display:block;height:100%;width:0;background:var(--teal);transition:width .3s}
.dots{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin:16px 0}
.dots a{display:flex;align-items:center;justify-content:center;height:34px;border-radius:8px;background:rgba(255,255,255,.08);color:#cfe2ec;text-decoration:none;font:600 .85rem var(--mono)}
.dots a.answered{background:var(--teal);color:var(--sea-900)}
.dots a.right{background:var(--ok);color:#fff}
.dots a.wrong{background:var(--bad);color:#fff}
.quiz-side .btn{width:100%;justify-content:center;margin-top:8px}
.q{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px 22px 18px;margin-bottom:16px;box-shadow:var(--shadow);transition:border-color .2s}
.q .qnum{font:600 .78rem var(--mono);color:var(--teal);letter-spacing:.1em;text-transform:uppercase}
.q .qtag{float:right;font:500 .72rem var(--mono);color:var(--muted);background:#f3f1ea;padding:3px 8px;border-radius:999px}
.q h3{font-family:var(--sans);font-size:1.08rem;font-weight:650;margin:.5em 0 .9em;line-height:1.4}
.opts{display:grid;gap:8px}
.opt{display:flex;gap:12px;align-items:flex-start;padding:11px 14px;border:1.5px solid var(--line);border-radius:12px;cursor:pointer;transition:border-color .15s,background .15s}
.opt:hover{border-color:#b9d7d2;background:#fbfdfc}
.opt input{margin-top:5px;accent-color:var(--teal);flex-shrink:0}
.opt.sel{border-color:var(--teal);background:#f2fbf9}
.q.graded .opt{cursor:default}
.opt.correct{border-color:var(--ok);background:#e9f7f2}
.opt.incorrect{border-color:var(--bad);background:#fdeeea}
.opt .mark{margin-left:auto;font:700 .75rem var(--mono);white-space:nowrap}
.opt.correct .mark{color:var(--ok)} .opt.incorrect .mark{color:var(--bad)}
.q.right{border-color:#9fd8c6} .q.wrong{border-color:#f0b5a8} .q.skipped{border-color:#e9d48c}
.explain{display:none;margin-top:14px;padding:14px 16px;border-radius:12px;background:#f5f8fa;font-size:.95rem}
.q.graded .explain{display:block}
.explain .verdict{font-weight:700}
.q.right .verdict{color:var(--ok)} .q.wrong .verdict,.q.skipped .verdict{color:var(--bad)}
.explain a.chlink{display:inline-flex;margin-top:8px;font-weight:600;text-decoration:none;background:var(--coral-soft);color:#a33a22;padding:6px 12px;border-radius:999px}
.explain a.chlink:hover{background:var(--coral);color:#fff}
.result{display:none;border-radius:var(--radius);padding:28px;margin-bottom:24px;color:#fff;background:linear-gradient(135deg,var(--sea-700),var(--sea-900))}
.result.show{display:block}
.result .score{font:700 3.2rem var(--mono);line-height:1}
.result .score small{font-size:1.2rem;color:#9dbccb}
.result h3{color:#fff;margin-top:8px}
.result.lvl-ready{background:linear-gradient(135deg,#0d7a66,#06392f)}
.result.lvl-close{background:linear-gradient(135deg,#0f5f86,#06243a)}
.result.lvl-brush{background:linear-gradient(135deg,#9c3b26,#3d1209)}
.result-note{margin:4px 0 16px;padding:12px 14px;border-radius:12px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.28);font-size:.9rem;line-height:1.5;color:#fff}
.result-note strong{color:#ffe08a}
.result ul{margin:12px 0 0;padding-left:18px}
.result a{color:#ffd9cf}
.result .actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.warnline{display:none;color:#ffd38a;font-size:.88rem;margin-top:8px}

/* ---------- CHAPTERS ---------- */
.chapters-index{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:50px}
.chapters-index a{display:block;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;text-decoration:none;color:var(--ink);transition:transform .15s,border-color .15s}
.chapters-index a:hover{transform:translateY(-2px);border-color:var(--teal);color:var(--ink)}
.chapters-index .n{font:600 .75rem var(--mono);color:var(--teal);letter-spacing:.1em}
.chapters-index .t{font-family:var(--serif);font-size:1.15rem;display:block;margin:.2em 0}
.chapters-index .d{font-size:.86rem;color:var(--muted)}
.chapter{background:#fff;border:1px solid var(--line);border-radius:22px;padding:44px 48px;margin-bottom:28px;box-shadow:var(--shadow)}
.chapter header{display:flex;gap:20px;align-items:baseline;margin-bottom:12px;flex-wrap:wrap}
.chapter .chno{font:700 .9rem var(--mono);color:#fff;background:var(--sea-800);border-radius:10px;padding:6px 10px}
.chapter h3{font-size:clamp(1.6rem,3vw,2.2rem);margin:0}
.chapter .hook{font-size:1.15rem;color:var(--ink-2);font-family:var(--serif);font-style:italic;margin-bottom:1.2em}
.chapter .body{max-width:760px}
.chapter h4{margin-top:1.6em}
table.data{border-collapse:collapse;width:100%;font-size:.94rem;margin:14px 0 20px;background:#fff}
table.data th,table.data td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
table.data th{font:600 .74rem var(--mono);text-transform:uppercase;letter-spacing:.06em;color:var(--muted);background:#faf9f5}
table.data td.num{font-family:var(--mono);white-space:nowrap}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:12px;border:1px solid var(--line)}
.table-scroll table.data{margin:0}
.feel{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start;background:#0a3554;color:#e1eef4;border-radius:14px;padding:18px 20px;margin:20px 0}
.feel .ico{font-size:1.6rem;line-height:1}
.feel b{color:#fff}
.feel .lbl{font:600 .7rem var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--teal);display:block;margin-bottom:4px}
.worked{border:1.5px dashed #b9cfd9;border-radius:14px;padding:16px 20px;margin:18px 0;background:#f8fbfc}
.worked .lbl{font:600 .7rem var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--sea-500);display:block;margin-bottom:6px}
.worked code,.eq{font-family:var(--mono);font-size:.9em;background:#eaf2f6;padding:2px 6px;border-radius:6px}
details.check{border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:18px 0;background:#fffdf7}
details.check summary{cursor:pointer;font-weight:650;list-style:none}
details.check summary::before{content:"🧠  Quick check: ";color:var(--coral);font-weight:700}
details.check[open] summary{margin-bottom:8px}
.back-to-quiz{font-size:.85rem;font-weight:600;text-decoration:none}

/* ---------- DEPTH LAB ---------- */
.lab{background:linear-gradient(180deg,#0a3554,#041726);color:#e1eef4;border-radius:22px;padding:30px;margin:0 0 40px;box-shadow:var(--shadow)}
.lab h3{color:#fff}
.lab .controls{display:flex;align-items:center;gap:18px;margin:16px 0 22px;flex-wrap:wrap}
.lab input[type=range]{flex:1;min-width:220px;accent-color:var(--teal);height:28px}
.lab .depthread{font:700 2.4rem var(--mono);color:#fff;min-width:130px}
.lab .depthread small{font-size:1rem;color:#8fb3c6}
.lab-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.lab-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:14px}
.lab-card .k{font:600 .68rem var(--mono);letter-spacing:.12em;text-transform:uppercase;color:#8fb3c6}
.lab-card .v{font:700 1.5rem var(--mono);color:#fff;display:block;margin:4px 0 2px}
.lab-card .s{font-size:.8rem;color:#9dbccb}
.lab-visual{display:grid;grid-template-columns:200px 1fr;gap:18px;margin-top:14px}
.balloon-box{background:rgba(255,255,255,.04);border-radius:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:14px;min-height:200px}
.balloon{border-radius:50%;background:radial-gradient(circle at 35% 30%,#ff9e85,#ff6b4a 55%,#c2412d);transition:width .2s,height .2s;box-shadow:0 0 30px rgba(255,107,74,.35)}
.swatches{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.swatch{border-radius:12px;padding:12px;min-height:90px;display:flex;flex-direction:column;justify-content:flex-end;border:1px solid rgba(255,255,255,.1);transition:background .2s}
.swatch .k{font:600 .7rem var(--mono);color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.6)}
.swatch .v{font:700 1.1rem var(--mono);color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.6)}
.lab .fine{font-size:.8rem;color:#8fb3c6;margin-top:14px}

/* ---------- CERTS ---------- */
.ladder{display:grid;gap:14px}
.rung{display:grid;grid-template-columns:200px 1fr;background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow)}
.rung .lvl{background:var(--sea-800);color:#fff;padding:20px;display:flex;flex-direction:column;justify-content:center}
.rung .lvl .step{font:600 .7rem var(--mono);letter-spacing:.14em;color:var(--teal);text-transform:uppercase}
.rung .lvl b{font-family:var(--serif);font-size:1.25rem;font-weight:600;line-height:1.2;margin-top:4px}
.rung .lvl .iso{font:500 .72rem var(--mono);color:#9dbccb;margin-top:8px}
.rung .cols{display:grid;grid-template-columns:repeat(3,1fr)}
.rung .ag{padding:16px 18px;border-left:1px solid var(--line);font-size:.9rem}
.rung .ag .an{font:700 .72rem var(--mono);letter-spacing:.1em;color:var(--muted);text-transform:uppercase}
.rung .ag .cn{font-weight:700;display:block;margin:2px 0 6px;font-size:1rem}
.rung .ag ul{margin:0;padding-left:16px;color:var(--ink-2)}
.rung .ag li{margin-bottom:2px}
.rung .ag.na{color:var(--muted);font-style:italic}

/* ---------- BODIES ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--shadow);display:flex;flex-direction:column}
.card .tag{align-self:flex-start;font:600 .68rem var(--mono);letter-spacing:.1em;text-transform:uppercase;background:var(--teal-soft);color:#0b6f63;border-radius:999px;padding:3px 9px;margin-bottom:10px}
.card .tag.in{background:#fff1d6;color:#8a5a00}
.card .tag.std{background:#e8eefc;color:#2b4a9c}
.card h4{font-family:var(--serif);font-size:1.18rem;font-weight:600;margin-bottom:.4em}
.card p{font-size:.92rem;color:var(--ink-2);flex:1}
.card a.url{font:500 .82rem var(--mono);word-break:break-all}
.subhead{margin:40px 0 16px;display:flex;align-items:center;gap:12px}
.subhead::after{content:"";flex:1;height:1px;background:var(--line)}

/* ---------- WHERE ---------- */
.lvl-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}
.lvl-tabs button{font:600 .92rem var(--sans);border:1.5px solid var(--line);background:#fff;color:var(--ink);padding:10px 16px;border-radius:999px;cursor:pointer}
.lvl-tabs button[aria-selected=true]{background:var(--sea-800);border-color:var(--sea-800);color:#fff}
.lvl-panel{display:none}
.lvl-panel.show{display:block}
.lvl-intro{display:grid;grid-template-columns:1.4fr 1fr;gap:20px;margin-bottom:20px}
.lvl-intro .box{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}
.schools{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.school{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 20px;box-shadow:var(--shadow)}
.school .top{display:flex;justify-content:space-between;gap:10px;align-items:flex-start}
.school h4{font-family:var(--serif);font-weight:600;font-size:1.15rem;margin:0}
.school .loc{font-size:.84rem;color:var(--muted)}
.badge{font:600 .66rem var(--mono);letter-spacing:.08em;text-transform:uppercase;padding:3px 8px;border-radius:999px;background:#eef3f6;color:var(--sea-700);white-space:nowrap}
.badge.padi{background:#e6eefc;color:#1f4aa8}.badge.ssi{background:#e8f6ee;color:#16784a}.badge.cmas{background:#fdeee6;color:#a5441f}.badge.gov{background:#fff1d6;color:#8a5a00}
.school p{font-size:.92rem;margin:.6em 0;color:var(--ink-2)}
.school a.url{font:500 .82rem var(--mono);word-break:break-all}
.sites{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:14px 0}
.site{background:#f8fbfc;border:1px solid #dde9ef;border-radius:14px;padding:14px}
.site b{display:block;font-size:.98rem}
.site .meta{font:500 .76rem var(--mono);color:var(--sea-500)}
.site p{font-size:.86rem;margin:.4em 0 0;color:var(--ink-2)}
.season{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:12px 0}
.season div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px;font-size:.86rem}
.season b{display:block;font-size:.95rem}
.global{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.global .g{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:14px;font-size:.88rem}
.global .g b{display:block;color:#fff;font-family:var(--serif);font-size:1.08rem;font-weight:600}
.global .g a{color:#7fd8cd;font-size:.8rem}

/* ---------- FOOTER ---------- */
footer{background:var(--sea-900);color:#9dbccb;padding:44px 0 56px;font-size:.9rem}
footer .wrap{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:center}
footer .proto{font:600 .85rem var(--mono);color:#fff;background:rgba(255,255,255,.06);border:1px dashed rgba(255,255,255,.25);padding:8px 14px;border-radius:10px}
footer a{color:#7fd8cd}

/* ---------- RESPONSIVE ---------- */
@media (max-width:960px){
  .hero .wrap{grid-template-columns:1fr;gap:28px}
  .quiz-shell{grid-template-columns:1fr}
  .quiz-side{position:static}
  .chapters-index{grid-template-columns:repeat(2,1fr)}
  .lab-grid{grid-template-columns:repeat(2,1fr)}
  .cards{grid-template-columns:repeat(2,1fr)}
  .rung{grid-template-columns:1fr}
  .rung .cols{grid-template-columns:1fr}
  .rung .ag{border-left:0;border-top:1px solid var(--line)}
  .lvl-intro{grid-template-columns:1fr}
  .global{grid-template-columns:repeat(2,1fr)}
  .season{grid-template-columns:repeat(2,1fr)}
  .sites{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  body{font-size:16px}
  .wordmark .wm-sub{display:none}
  .topbar .wrap{gap:12px}
  section.block{padding:56px 0}
  .chapter{padding:26px 20px;border-radius:18px}
  .chapters-index{grid-template-columns:1fr}
  .cards,.schools,.sites{grid-template-columns:1fr}
  .lab{padding:20px}
  .lab-visual{grid-template-columns:1fr}
  .swatches{grid-template-columns:repeat(2,1fr)}
  .hero{padding:48px 0 44px}
  .dots{grid-template-columns:repeat(8,1fr)}
}
@media print{.topbar{position:static}}

/* ---------- shared additions for multi-slider labs ---------- */
.lab .ctl{display:grid;grid-template-columns:minmax(150px,210px) 1fr minmax(84px,auto);align-items:center;gap:14px;margin:8px 0}
.lab .ctl label{font:600 .85rem var(--sans);color:#cfe2ec}
.lab .ctl output{font:700 1.05rem var(--mono);color:#fff;text-align:right}
.lab .ctl input[type=range]{min-width:0;width:100%}
.lab .seg{display:flex;flex-wrap:wrap;gap:6px}
.lab .seg button{font:600 .82rem var(--sans);border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.06);color:#dbe9f0;border-radius:999px;padding:6px 12px;cursor:pointer}
.lab .seg button[aria-pressed=true]{background:var(--teal);color:var(--sea-900);border-color:var(--teal)}
.lab .bar-vis{height:14px;border-radius:8px;background:rgba(255,255,255,.08);overflow:hidden;margin-top:6px}
.lab .bar-vis span{display:block;height:100%;background:linear-gradient(90deg,var(--teal),#7fe0d4);width:0;transition:width .25s}
.gauge{margin-top:28px;display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:.78rem;color:#8fb3c6}
.gauge .bar{flex:1;height:6px;border-radius:6px}
.skip-note{font-size:.86rem;color:var(--muted)}
@media (max-width:640px){.lab .ctl{grid-template-columns:1fr auto;}.lab .ctl label{grid-column:1/-1}}

/* ---------- theme: kayaking & rafting (glacier river & whitewater) ---------- */
.hero{background:radial-gradient(1100px 520px at 82% -10%,#2bb3a3 0%,transparent 55%),radial-gradient(900px 500px at 10% 120%,#e07b39 0%,transparent 60%),linear-gradient(180deg,#0f3b46,#081f26)}
.gauge .bar{background:linear-gradient(90deg,#9be7c4 0%,#7fd3ff 30%,#f3d34a 60%,#ff7a45 85%,#c0392b 100%)}

/* ---------- mobile section menu: own row, swipeable, snap + edge fades (v2) ---------- */
.sectionnav{scroll-behavior:smooth}
@media (max-width:640px){
  :root{--nav-h:100px}
  .topbar .wrap{flex-wrap:wrap;height:auto;padding-top:10px;row-gap:6px;column-gap:12px}
  .wordmark .wm-sub{display:inline;max-width:52vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .sectionnav{flex:0 0 calc(100% + 40px);width:calc(100% + 40px);margin:0 -20px;padding:2px 20px 10px;
    scroll-snap-type:x proximity;scroll-padding-inline:20px;overscroll-behavior-x:contain}
  .sectionnav a{scroll-snap-align:start;flex-shrink:0;background:rgba(255,255,255,.07);padding:8px 14px}
  .sectionnav a:last-child{scroll-snap-align:end}
  .sectionnav a.active{background:var(--teal)}
  .sectionnav.fade-r{-webkit-mask-image:linear-gradient(90deg,#000 calc(100% - 48px),transparent);mask-image:linear-gradient(90deg,#000 calc(100% - 48px),transparent)}
  .sectionnav.fade-l{-webkit-mask-image:linear-gradient(90deg,transparent,#000 48px);mask-image:linear-gradient(90deg,transparent,#000 48px)}
  .sectionnav.fade-l.fade-r{-webkit-mask-image:linear-gradient(90deg,transparent,#000 48px,#000 calc(100% - 48px),transparent);mask-image:linear-gradient(90deg,transparent,#000 48px,#000 calc(100% - 48px),transparent)}
}