:root{
  --red:#C8102E; --red-dark:#9E0C24; --ink:#16181D; --muted:#4A4F59; --line:#E3E1DA;
  --bg:#FAFAF7; --card:#FFFFFF; --chip:#F1EFE8; --blue-bg:#E6F0FB; --blue-ink:#0B3A6E;
  --amber-bg:#FFF1DE; --amber-line:#F0C98E; --amber-ink:#7A4200;
  --radius:16px; --tabbar-h:64px;
  --display:'Bricolage Grotesque', system-ui, sans-serif;
  --body:'Atkinson Hyperlegible', system-ui, -apple-system, 'Segoe UI', sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:18px;line-height:1.55}
a{color:var(--ink)} a:hover{color:var(--red)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--red);outline-offset:2px}
img,svg{display:block}
h1,h2,h3{line-height:1.12;margin:0}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.narrow{max-width:820px}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:10px 14px;border-radius:8px;z-index:50}
.skip:focus{left:8px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* Top bar */
.topbar{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;padding-top:env(safe-area-inset-top)}
.topbar-in{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.brand-mark{width:42px;height:42px;border-radius:10px;background:var(--red);display:flex;align-items:center;justify-content:center;flex:none}
.brand-mark svg{width:24px;height:24px;fill:none;stroke:#fff;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.brand-name{font-family:var(--display);font-weight:800;font-size:23px;letter-spacing:-.02em}
.brand-name b{color:var(--red);font-weight:800}
.topnav{display:flex;gap:4px;margin-left:auto}
.topnav a{padding:10px 14px;text-decoration:none;font-weight:700;border-radius:10px}
.topnav a[aria-current="page"]{color:var(--red);background:#FBE9EC}
.install-btn{min-height:44px;padding:0 16px;border-radius:10px;border:2px solid var(--ink);background:var(--card);font:inherit;font-weight:700;font-size:16px;cursor:pointer}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 24px;border-radius:12px;font:inherit;font-weight:700;text-decoration:none;cursor:pointer;border:2px solid var(--ink);background:var(--card);color:var(--ink)}
.btn svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{color:#fff;background:#000}
.btn-red{background:var(--red);border-color:var(--red);color:#fff}
.btn-red:hover{background:var(--red-dark);border-color:var(--red-dark);color:#fff}
.btn-light{background:#fff;border-color:#fff;color:var(--ink)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}

/* Hero */
.hero{background:var(--card);border-bottom:1px solid var(--line)}
.hero-in{padding:64px 20px 56px;display:flex;flex-direction:column;gap:22px}
.eyebrow{margin:0;font-weight:700;color:var(--red);text-transform:uppercase;letter-spacing:.08em;font-size:14px}
.hero h1{font-family:var(--display);font-weight:800;font-size:clamp(40px,7vw,76px);line-height:1.02;letter-spacing:-.03em;max-width:820px}
.lede{margin:0;font-size:21px;color:var(--muted);max-width:680px}
.search{display:flex;flex-wrap:wrap;gap:12px;max-width:720px}
.search-box{flex:1 1 300px;display:flex;align-items:center;gap:10px;border:2px solid var(--ink);border-radius:12px;padding:0 16px;background:#fff;min-height:56px}
.search-box svg{width:22px;height:22px;fill:none;stroke:var(--muted);stroke-width:2;stroke-linecap:round;flex:none}
.search-box input{flex:1;border:0;outline:none;font:inherit;background:transparent;min-width:0}
.chips{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.chips span{color:var(--muted);font-size:16px}
.chip{padding:8px 14px;border-radius:999px;background:var(--chip);text-decoration:none;font-size:16px;font-weight:700}

/* Sections */
.section{padding:56px 0 8px}
.section-title{font-family:var(--display);font-weight:800;font-size:clamp(30px,4.5vw,40px);letter-spacing:-.02em;margin-bottom:24px}
.page-head{padding:40px 0 8px;display:flex;flex-direction:column;gap:12px}
.page-head h1{font-family:var(--display);font-weight:800;font-size:clamp(34px,6vw,54px);letter-spacing:-.03em;line-height:1.05}

/* Topic cards */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.topic-card{display:flex;gap:16px;padding:22px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s}
.topic-card:hover{border-color:var(--ink);color:var(--ink);transform:translateY(-1px)}
.topic-ico{flex:none;width:52px;height:52px;border-radius:12px;background:var(--chip);display:flex;align-items:center;justify-content:center}
.topic-ico svg{width:28px;height:28px;fill:none;stroke:var(--ink);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.topic-card strong{font-size:20px;display:block}
.topic-card small{color:var(--muted);font-size:16px;display:block}
.count{color:var(--red);font-weight:700;font-size:14px;margin-top:4px;display:block}

/* Promo */
.promo{background:var(--ink);color:#fff;border-radius:24px;padding:44px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px}
.promo div{flex:1 1 440px;display:flex;flex-direction:column;gap:10px}
.promo .eyebrow{color:#FF8A9B}
.promo h2{font-family:var(--display);font-weight:800;font-size:clamp(30px,4.5vw,40px);letter-spacing:-.02em}
.promo p{margin:0;color:#D6D8DD;font-size:19px}

/* Guide list */
.list{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.list a{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 22px;border-bottom:1px solid var(--line);text-decoration:none}
.list a:last-child{border-bottom:0}
.list a:hover{background:#FCFBF8}
.list strong{font-size:19px;display:block}
.list small{color:var(--muted);font-size:15px;display:block}
.badge{flex:none;padding:4px 12px;border-radius:999px;font-size:14px;font-weight:700;background:var(--blue-bg);color:#0B4A8B}
.badge.medium{background:var(--amber-bg);color:var(--amber-ink)}
.empty{padding:28px;background:var(--card);border:1px dashed #C9C5BA;border-radius:var(--radius);color:var(--muted)}

/* How it works */
.how{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.how div{padding:22px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius)}
.how b{font-family:var(--display);font-size:32px;color:var(--red);display:block}
.how strong{font-size:20px;display:block}
.how span{color:var(--muted);font-size:16px}

/* Guide page */
.crumbs{font-size:15px;color:var(--muted);display:flex;flex-wrap:wrap;gap:8px;padding-top:28px}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}
.fact{padding:16px 20px;background:var(--card);border:1px solid var(--line);border-radius:14px}
.fact span{display:block;font-size:13px;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:.06em}
.fact b{font-size:18px}
.note{display:flex;gap:14px;padding:18px 22px;background:var(--amber-bg);border:1px solid var(--amber-line);border-radius:14px}
.note svg{flex:none;width:26px;height:26px;fill:none;stroke:var(--amber-ink);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;margin-top:2px}
.guide{display:flex;flex-direction:column;gap:28px;padding-bottom:40px}
.guide-actions{display:flex;flex-wrap:wrap;gap:10px}
.guide-actions .btn{min-height:46px;padding:0 18px;font-size:16px}
.guide-actions .btn[aria-pressed="true"]{background:var(--ink);color:#fff}
.steps{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px;counter-reset:s}
.step{display:flex;gap:18px;padding:22px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);counter-increment:s}
.step::before{content:counter(s);flex:none;width:42px;height:42px;border-radius:999px;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.step.done{opacity:.6}
.step.done::before{content:"✓";background:#1F7A4D}
.step-body{flex:1;min-width:0;display:flex;flex-direction:column;gap:8px}
.step h3{font-size:21px}
.step p{margin:0}
.step ol{margin:0;padding-left:22px;display:flex;flex-direction:column;gap:6px}
.step-done{align-self:flex-start;margin-top:4px;min-height:40px;padding:0 14px;border-radius:10px;border:1.5px solid var(--line);background:#fff;font:inherit;font-size:15px;font-weight:700;cursor:pointer;color:var(--muted)}
.step.done .step-done{color:#1F7A4D;border-color:#1F7A4D}
.duo{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.panel{padding:22px;border-radius:var(--radius);display:flex;flex-direction:column;gap:10px}
.panel h2,.panel h3{font-size:22px}
.panel ul,.panel ol{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:6px}
.panel-blue{background:var(--blue-bg)} .panel-blue h2,.panel-blue h3,.panel-blue a{color:var(--blue-ink)}
.panel-dark{background:var(--ink);color:#fff} .panel-dark li{color:#E4E6EA}
.feedback{display:flex;flex-wrap:wrap;align-items:center;gap:12px;padding-top:24px;border-top:1px solid var(--line)}

/* Checker */
.options{display:flex;flex-direction:column;gap:12px}
.option{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;min-height:72px;padding:16px 22px;text-align:left;background:var(--card);border:2px solid var(--line);border-radius:14px;font:inherit;color:var(--ink);cursor:pointer}
.option:hover{border-color:var(--ink)}
.option strong{display:block;font-size:19px}
.option small{display:block;color:var(--muted);font-size:16px}
.option svg{flex:none;width:22px;height:22px;fill:none;stroke:var(--ink);stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.result{padding:26px;background:var(--card);border:2px solid var(--ink);border-radius:18px;display:flex;flex-direction:column;gap:8px}
.result h2{font-family:var(--display);font-weight:800;font-size:clamp(26px,4vw,32px);letter-spacing:-.02em}
.result p{margin:0}
.small{font-size:15px;color:var(--muted)}

/* SOS */
.sos{display:flex;flex-wrap:wrap;gap:10px}
.sos a{display:inline-flex;flex-direction:column;min-width:120px;padding:12px 16px;border-radius:12px;background:var(--card);border:1px solid var(--line);text-decoration:none}
.sos a b{font-size:22px;color:var(--red)}
.sos a span{font-size:14px;color:var(--muted)}

/* Footer */
.footer{border-top:1px solid var(--line);background:var(--card);margin-top:56px}
.footer-in{padding:36px 20px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:24px}
.footer p{margin:6px 0 0;color:var(--muted);font-size:15px;max-width:480px}
.footer-links{display:flex;flex-wrap:wrap;gap:18px;font-size:15px;align-items:flex-start}

/* Toast */
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);background:var(--ink);color:#fff;padding:12px 18px;border-radius:12px;font-size:16px;font-weight:700;opacity:0;pointer-events:none;transition:all .2s;z-index:40;max-width:calc(100% - 32px)}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* App tab bar — phones */
.tabbar{display:none}
@media (max-width:760px){
  body{font-size:17px}
  .topnav,.footer-links{display:none}
  .topbar-in{min-height:60px}
  .brand-mark{width:38px;height:38px}
  .brand-name{font-size:21px}
  .install-btn{min-height:40px;font-size:15px;padding:0 12px}
  .hero-in{padding:36px 20px 36px}
  .lede{font-size:19px}
  .section{padding:40px 0 4px}
  .grid{grid-template-columns:1fr;gap:10px}
  .topic-card{padding:16px}
  .promo{padding:28px 22px;border-radius:20px}
  .step{padding:18px;gap:14px}
  .list a{padding:16px 18px}
  .footer{margin-top:40px;padding-bottom:calc(var(--tabbar-h) + env(safe-area-inset-bottom))}
  .toast{bottom:calc(var(--tabbar-h) + 16px + env(safe-area-inset-bottom))}
  .tabbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:30;background:rgba(255,255,255,.97);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);backdrop-filter:blur(8px)}
  .tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;height:var(--tabbar-h);text-decoration:none;color:var(--muted);font-size:12px;font-weight:700}
  .tabbar svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
  .tabbar a[aria-current="page"]{color:var(--red)}
}
@media (display-mode:standalone){ .install-btn{display:none} }
@media (prefers-reduced-motion:reduce){ *{transition:none!important} }
@media print{ .topbar,.tabbar,.footer,.guide-actions,.feedback,.step-done{display:none!important} body{background:#fff} }

/* Dark mode (DIY): the house theme flips --ink and --card, so surfaces that used --ink as a dark background or a hard-coded light colour are re-set here for contrast. */
:root:not([data-theme="light"]){--blue-bg:#16324A;--blue-ink:#CFE5FF;--amber-bg:#3A2A12;--amber-line:#7A5A1F;--amber-ink:#FFD596;--chip:#1B3445;--sel:#2F5D7C;--panel-d:#1B3445;--red-t:#FF8A9B;--green-t:#6FD39B}
:root:not([data-theme="light"]) .eyebrow,:root:not([data-theme="light"]) .count,:root:not([data-theme="light"]) .how b,:root:not([data-theme="light"]) .sos a b,:root:not([data-theme="light"]) .lmod,:root:not([data-theme="light"]) .lq legend .small,:root:not([data-theme="light"]) .brand-name b,:root:not([data-theme="light"]) a:hover{color:var(--red-t)}
:root:not([data-theme="light"]) .topnav a[aria-current="page"]{color:var(--red-t);background:#3A1B24}
:root:not([data-theme="light"]) .skip,:root:not([data-theme="light"]) .btn-dark,:root:not([data-theme="light"]) .guide-actions .btn[aria-pressed="true"],:root:not([data-theme="light"]) .step::before,:root:not([data-theme="light"]) .lchip[aria-pressed="true"],:root:not([data-theme="light"]) .lnum,:root:not([data-theme="light"]) .toast{background:var(--sel);color:#fff;border-color:var(--sel)}
:root:not([data-theme="light"]) .btn-dark:hover{background:#3C7094;color:#fff}
:root:not([data-theme="light"]) .btn-light{background:#fff;border-color:#fff;color:#161B26}
:root:not([data-theme="light"]) .panel-dark,:root:not([data-theme="light"]) .promo{background:var(--panel-d);color:#EAF0F6;border:1px solid var(--sel)}
:root:not([data-theme="light"]) .panel-dark li,:root:not([data-theme="light"]) .promo p{color:#EAF0F6}
:root:not([data-theme="light"]) .search-box,:root:not([data-theme="light"]) .step-done,:root:not([data-theme="light"]) .lopt{background:var(--card)}
:root:not([data-theme="light"]) .step.done .step-done{color:var(--green-t);border-color:var(--green-t)}
:root:not([data-theme="light"]) .tabbar{background:rgba(19,36,47,.97)}
:root:not([data-theme="light"]) .list a:hover{background:#172B37}
:root:not([data-theme="light"]) .badge,:root:not([data-theme="light"]) .lvl-beginner{color:var(--blue-ink)}
:root:not([data-theme="light"]) .badge.medium,:root:not([data-theme="light"]) .lvl-intermediate{color:var(--amber-ink)}
:root:not([data-theme="light"]) .ltile.passed{background:#12301F;border-color:#2F6B48}
:root:not([data-theme="light"]) .lpass{color:var(--green-t)}
:root:not([data-theme="light"]) .edu-note,:root:not([data-theme="light"]) .edu-note strong,:root:not([data-theme="light"]) .chip{color:#EAF0F6!important}
:root:not([data-theme="light"]) .skip{color:#fff!important}
:root:not([data-theme="light"]) .tabbar a[aria-current="page"],:root:not([data-theme="light"]) .tabbar a[aria-current="page"] span{color:var(--red-t)!important}
/* Beats hub/contrast.css, which assumed light chips and notes in dark mode. */
html[data-theme="dark"][data-area="diy"] body .edu-note,html[data-theme="dark"][data-area="diy"] body .edu-note strong,html[data-theme="dark"][data-area="diy"] body a.chip{color:#EAF0F6!important}
html[data-theme="dark"][data-area="diy"] body a.skip{color:#fff!important}
:root:not([data-theme="light"]) .lopt.good{background:#12301F;border-color:#2F6B48;color:#B8F0D0}
:root:not([data-theme="light"]) .lopt.bad{background:#3A1B24;border-color:#8A2A3C;color:#FFC2CC}
.step.done{opacity:1}