/* ============================================================
   Maths Prompt Studio design system
   A warm, scholarly, ink-on-paper design system.
   ============================================================ */

@font-face{
  font-family:'Fraunces';
  font-style:normal;
  font-weight:400 900;
  font-display:swap;
  src:url('assets/fraunces-latin.woff2') format('woff2');
}

:root{
  --paper:#f6f1e7;
  --paper-2:#fffdf8;
  --surface:#fffefb;
  --surface-2:#f3ecdd;
  --ink:#23262d;
  --ink-soft:#55524b;
  --ink-faint:#8a857c;
  --line:#e4dcc9;
  --line-2:#d9cfb8;
  --blue:#2b3f6b;
  --blue-2:#3a5288;
  --gold:#b1822c;
  --gold-soft:#e9d6a8;
  --violet:#6b4aa0;
  --violet-soft:#ece4f7;
  --green:#2f7d56;
  --green-soft:#dcefe0;
  --rose:#a8475e;
  --shadow-sm:0 1px 2px rgba(40,30,10,.06), 0 2px 6px rgba(40,30,10,.05);
  --shadow:0 6px 22px rgba(50,38,12,.10), 0 2px 8px rgba(50,38,12,.06);
  --shadow-lg:0 24px 60px rgba(40,30,8,.20);
  --radius:18px;
  --radius-sm:12px;
  --maxw:1180px;
  --font-head:'Fraunces',Georgia,serif;
  --font-body:'Inter',system-ui,-apple-system,sans-serif;
  --font-sign:'Caveat',cursive;
  --font-mono:'JetBrains Mono',ui-monospace,Menlo,monospace;
}

[data-theme="dark"]{
  --paper:#15171c;
  --paper-2:#1b1e25;
  --surface:#1d2128;
  --surface-2:#252a33;
  --ink:#ece8df;
  --ink-soft:#b6b2a8;
  --ink-faint:#86827a;
  --line:#2e333d;
  --line-2:#3a414d;
  --blue:#9db4e6;
  --blue-2:#b3c4ee;
  --gold:#e0bd6e;
  --gold-soft:#3a3320;
  --violet:#c2a9ec;
  --violet-soft:#2c2640;
  --green:#7fd1a4;
  --green-soft:#21342a;
  --rose:#e09aac;
  --shadow-sm:0 1px 2px rgba(0,0,0,.3);
  --shadow:0 8px 26px rgba(0,0,0,.45);
  --shadow-lg:0 26px 60px rgba(0,0,0,.6);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--font-body);font-size:16px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(1200px 600px at 80% -10%, rgba(177,130,44,.08), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(107,74,160,.07), transparent 55%);
  background-attachment:fixed;
}
a{color:var(--blue-2);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{font-family:var(--font-head);line-height:1.12;margin:0;font-weight:700;letter-spacing:-.01em}
em{font-style:italic}
.code,code{font-family:var(--font-mono);font-size:.86em;background:var(--surface-2);padding:.1em .4em;border-radius:6px;color:var(--gold)}
.muted{color:var(--ink-faint);font-weight:500}
.hl{background:linear-gradient(transparent 62%, var(--gold-soft) 62%);padding:0 .15em}

/* ---------- HEADER ---------- */
.site-head{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:20px;
  padding:12px clamp(16px,4vw,40px);
  background:color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink)!important;text-decoration:none!important}
.brand-mark{
  font-family:var(--font-head);font-size:30px;font-weight:900;line-height:1;
  width:46px;height:46px;display:grid;place-items:center;border-radius:13px;
  background:linear-gradient(150deg,var(--blue),var(--violet));color:#fff;
  box-shadow:var(--shadow-sm);
}
.brand-text{display:flex;flex-direction:column}
.brand-name{font-family:var(--font-head);font-weight:700;font-size:18px;letter-spacing:-.02em}
.brand-by{font-family:var(--font-sign);font-size:16px;color:var(--gold);line-height:1;margin-top:-1px}
.head-nav{margin-left:auto;display:flex;gap:6px}
.head-nav a{color:var(--ink-soft);font-weight:600;font-size:14.5px;padding:8px 12px;border-radius:9px;text-decoration:none}
.head-nav a:hover{background:var(--surface-2);color:var(--ink)}
.theme-btn{
  border:1px solid var(--line-2);background:var(--surface);color:var(--ink);
  width:42px;height:42px;border-radius:11px;font-size:18px;cursor:pointer;display:grid;place-items:center;
  transition:transform .15s, background .15s;
}
.theme-btn:hover{transform:rotate(-15deg);background:var(--surface-2)}

/* ---------- HERO ---------- */
.hero{position:relative;overflow:hidden;padding:clamp(48px,8vw,104px) clamp(16px,4vw,40px) clamp(40px,6vw,72px)}
.hero-glow{position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(680px 360px at 78% 8%, rgba(177,130,44,.18), transparent 62%),
    radial-gradient(620px 340px at 12% 90%, rgba(107,74,160,.16), transparent 60%);
}
.hero-inner{position:relative;max-width:920px;margin:0 auto;text-align:center}
.eyebrow{font-weight:700;letter-spacing:.12em;text-transform:uppercase;font-size:12.5px;color:var(--gold);margin:0 0 18px}
.hero h1{font-size:clamp(34px,6vw,62px);font-weight:900;letter-spacing:-.025em}
.hero h1 em{color:var(--violet);font-weight:700}
.lede{font-size:clamp(16px,2.1vw,20px);color:var(--ink-soft);max-width:720px;margin:22px auto 0;line-height:1.55}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:30px}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:16px;padding:14px 26px;border-radius:13px;cursor:pointer;border:1px solid transparent;text-decoration:none!important;transition:transform .14s, box-shadow .14s, background .14s}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(150deg,var(--blue),var(--violet));color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{box-shadow:var(--shadow-lg)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line-2);box-shadow:var(--shadow-sm)}
.hero-stats{display:flex;justify-content:center;gap:clamp(20px,5vw,56px);margin-top:44px;flex-wrap:wrap}
.stat{display:flex;flex-direction:column;align-items:center}
.stat-num{font-family:var(--font-head);font-weight:900;font-size:clamp(28px,4vw,40px);color:var(--blue);line-height:1}
.stat-lbl{font-size:13px;color:var(--ink-faint);font-weight:600;text-transform:uppercase;letter-spacing:.08em;margin-top:6px}
.hero-sign{margin-top:46px;display:flex;flex-direction:column;align-items:center;gap:2px}
.sign-line{width:160px;height:1.5px;background:linear-gradient(90deg,transparent,var(--gold),transparent)}
.sign-name{font-family:var(--font-sign);font-size:34px;color:var(--gold);transform:rotate(-3deg)}

/* ---------- SECTIONS ---------- */
.section{max-width:var(--maxw);margin:0 auto;padding:clamp(48px,7vw,88px) clamp(16px,4vw,40px)}
.section-tint{max-width:none;background:linear-gradient(180deg,transparent,var(--paper-2) 12%,var(--paper-2) 88%,transparent);border-block:1px solid var(--line)}
.section-tint>*{max-width:var(--maxw);margin-inline:auto}
.section-head{text-align:center;max-width:760px;margin:0 auto 44px}
.kicker{display:inline-block;font-weight:800;letter-spacing:.14em;text-transform:uppercase;font-size:12px;color:var(--violet);background:var(--violet-soft);padding:6px 14px;border-radius:30px;margin-bottom:16px}
.section-head h2{font-size:clamp(26px,4vw,42px);font-weight:800;letter-spacing:-.02em}
.section-head .sub{color:var(--ink-soft);font-size:clamp(15px,1.8vw,18px);margin:14px auto 0;max-width:640px}

/* ---------- STEPS ---------- */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px}
.step{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px 22px;box-shadow:var(--shadow-sm)}
.step-n{position:absolute;top:-16px;left:22px;width:38px;height:38px;border-radius:11px;background:linear-gradient(150deg,var(--gold),#d9a84a);color:#fff;font-family:var(--font-head);font-weight:900;font-size:19px;display:grid;place-items:center;box-shadow:var(--shadow-sm)}
.step h3{font-size:18.5px;margin:10px 0 8px}
.step p{color:var(--ink-soft);font-size:14.5px;margin:0}
.chip{display:inline-block;font-size:11.5px;font-weight:700;padding:2px 9px;border-radius:20px;white-space:nowrap}
.chip-photo{background:var(--green-soft);color:var(--green)}
.callout{margin-top:30px;background:var(--violet-soft);border:1px solid color-mix(in srgb,var(--violet) 25%, transparent);border-radius:var(--radius-sm);padding:18px 22px;color:var(--ink);font-size:15px}
.callout strong{color:var(--violet)}

/* ---------- TOOLS ---------- */
.tools-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.tool-card{display:flex;flex-direction:column;gap:6px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm);color:var(--ink)!important;text-decoration:none!important;transition:transform .15s,box-shadow .15s,border-color .15s}
.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--gold)}
.tool-logo{font-size:34px;line-height:1}
.tool-name{font-family:var(--font-head);font-weight:700;font-size:20px}
.tool-note{color:var(--ink-soft);font-size:14px;flex:1}
.tool-go{color:var(--blue-2);font-weight:700;font-size:14px;margin-top:6px}
.tips{margin-top:36px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px;box-shadow:var(--shadow-sm)}
.tips h3{font-size:20px;margin-bottom:14px}
.tips ul{margin:0;padding-left:20px;display:grid;gap:10px}
.tips li{color:var(--ink-soft);font-size:15px}
.tips strong{color:var(--ink)}

/* ---------- LIBRARY CONTROLS ---------- */
.library-controls{position:sticky;top:70px;z-index:30;background:color-mix(in srgb,var(--paper) 90%, transparent);backdrop-filter:blur(8px);padding:14px 0 16px;margin-bottom:10px;border-bottom:1px solid var(--line)}
.search-wrap{position:relative;max-width:640px;margin:0 auto 16px}
.search-ic{position:absolute;left:16px;top:50%;transform:translateY(-50%);font-size:16px;opacity:.6}
#search{width:100%;padding:14px 16px 14px 44px;font-size:16px;font-family:var(--font-body);border:1.5px solid var(--line-2);border-radius:14px;background:var(--surface);color:var(--ink);box-shadow:var(--shadow-sm)}
#search:focus{outline:none;border-color:var(--violet);box-shadow:0 0 0 4px var(--violet-soft)}
.filter-chips{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.fchip{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:13.5px;padding:8px 14px;border-radius:30px;border:1.5px solid var(--line-2);background:var(--surface);color:var(--ink-soft);cursor:pointer;transition:all .14s;white-space:nowrap}
.fchip:hover{border-color:var(--gold);color:var(--ink)}
.fchip.active{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.fchip .fchip-ct{font-size:11.5px;opacity:.7}

/* ---------- CATEGORY STREAM ---------- */
.cat-block{margin:42px 0 8px;scroll-margin-top:150px}
.cat-block-head{display:flex;align-items:baseline;gap:12px;margin-bottom:18px;padding-bottom:12px;border-bottom:2px solid var(--line)}
.cat-ic{font-size:26px}
.cat-block-head h3{font-size:clamp(20px,3vw,28px);font-weight:800}
.cat-count{margin-left:auto;font-size:13px;color:var(--ink-faint);font-weight:700;background:var(--surface-2);padding:4px 11px;border-radius:20px}
.cat-blurb{color:var(--ink-soft);font-size:15px;margin:-8px 0 20px}

.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:18px}
.card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-sm);transition:transform .15s,box-shadow .15s,border-color .15s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-2)}
.card-tags{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:12px}
.tag{font-size:11px;font-weight:700;padding:3px 9px;border-radius:20px;letter-spacing:.02em}
.tag-cat{background:var(--surface-2);color:var(--ink-soft)}
.tag-img{background:var(--green-soft);color:var(--green)}
.tag-txt{background:var(--violet-soft);color:var(--violet)}
.card h4{font-size:18px;font-weight:700;margin:0 0 8px;line-height:1.25}
.card-what{color:var(--ink-soft);font-size:14px;flex:1;margin:0 0 14px}
.card-meta{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--ink-faint);margin-bottom:14px}
.card-meta b{color:var(--blue-2);font-weight:700}
.card-actions{display:flex;gap:8px;margin-top:auto}
.btn-copy{flex:1;display:inline-flex;align-items:center;justify-content:center;gap:7px;font-weight:700;font-size:14.5px;padding:11px 14px;border-radius:11px;border:none;cursor:pointer;background:linear-gradient(150deg,var(--blue),var(--blue-2));color:#fff;transition:transform .12s,box-shadow .12s}
.btn-copy:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-copy.done{background:linear-gradient(150deg,var(--green),#3a9c6a)}
.btn-view{padding:11px 14px;border-radius:11px;border:1.5px solid var(--line-2);background:var(--surface);color:var(--ink);font-weight:700;font-size:14px;cursor:pointer}
.btn-view:hover{background:var(--surface-2)}

.no-results{text-align:center;color:var(--ink-faint);padding:60px 20px;font-size:17px}
.loading{text-align:center;color:var(--ink-faint);padding:60px;font-size:16px}

/* ---------- DOWNLOADS ---------- */
.dl-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}
.dl-card{display:flex;flex-direction:column;gap:7px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow-sm);color:var(--ink)!important;text-decoration:none!important;transition:transform .15s,box-shadow .15s,border-color .15s}
.dl-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--gold)}
.dl-card.disabled{opacity:.55;pointer-events:none}
.dl-ic{font-size:36px}
.dl-title{font-family:var(--font-head);font-weight:700;font-size:19px}
.dl-note{color:var(--ink-soft);font-size:14px;flex:1}
.dl-go{color:var(--blue-2);font-weight:700;font-size:14.5px;margin-top:6px}

/* ---------- FAQ ---------- */
.faq{max-width:780px;margin:0 auto;display:grid;gap:12px}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:4px 20px;box-shadow:var(--shadow-sm)}
.faq summary{cursor:pointer;font-weight:700;font-size:16.5px;padding:16px 0;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:10px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';font-family:var(--font-head);font-size:24px;color:var(--gold);font-weight:700;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{margin:0 0 18px;color:var(--ink-soft);font-size:15px;line-height:1.6}

/* ---------- FOOTER ---------- */
.site-foot{text-align:center;padding:64px 20px 56px;border-top:1px solid var(--line);background:var(--paper-2)}
.foot-sign{display:flex;flex-direction:column-reverse;align-items:center;margin-bottom:18px}
.foot-sign-name{font-family:var(--font-sign);font-size:46px;color:var(--gold);transform:rotate(-3deg);line-height:1}
.foot-sign-sub{font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint);font-weight:700;margin-bottom:8px}
.foot-meta{color:var(--ink-faint);font-size:13px}

/* ---------- TOAST ---------- */
.toast{position:fixed;left:50%;bottom:30px;transform:translateX(-50%) translateY(140%);background:var(--ink);color:var(--paper);padding:14px 24px;border-radius:13px;font-weight:600;font-size:15px;box-shadow:var(--shadow-lg);z-index:200;transition:transform .35s cubic-bezier(.2,.9,.3,1.2)}
.toast.show{transform:translateX(-50%) translateY(0)}

/* ---------- MODAL ---------- */
.modal{position:fixed;inset:0;z-index:150;display:none}
.modal.open{display:block}
.modal-backdrop{position:absolute;inset:0;background:rgba(20,15,5,.55);backdrop-filter:blur(3px)}
.modal-card{position:relative;max-width:760px;margin:5vh auto;max-height:90vh;overflow:auto;background:var(--surface);border:1px solid var(--line-2);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:28px clamp(20px,4vw,38px)}
.modal-x{position:absolute;top:14px;right:16px;width:38px;height:38px;border-radius:10px;border:1px solid var(--line-2);background:var(--surface);color:var(--ink);font-size:24px;line-height:1;cursor:pointer}
.modal-x:hover{background:var(--surface-2)}
.modal-body h3{font-size:24px;margin-bottom:6px;padding-right:40px}
.modal-tags{display:flex;gap:7px;flex-wrap:wrap;margin:10px 0 16px}
.modal-how{background:var(--violet-soft);border-radius:var(--radius-sm);padding:14px 18px;font-size:14.5px;margin-bottom:18px}
.modal-how b{color:var(--violet)}
.prompt-box{position:relative;background:var(--surface-2);border:1px solid var(--line-2);border-radius:var(--radius-sm);padding:18px 18px 18px;margin-bottom:16px}
.prompt-box pre{margin:0;white-space:pre-wrap;word-wrap:break-word;font-family:var(--font-mono);font-size:13px;line-height:1.62;color:var(--ink);max-height:46vh;overflow:auto}
.modal-actions{display:flex;gap:10px;flex-wrap:wrap}
.modal-actions .btn-copy{flex:1;min-width:180px}

/* ---------- RESPONSIVE ---------- */
@media (max-width:760px){
  .head-nav{display:none}
  .library-controls{top:64px}
  .cards{grid-template-columns:1fr}
}
@media (max-width:420px){
  .hero-stats{gap:18px}
}

/* ============================================================
   v2 - Beginner guide, attach steps, groups, reliability
   ============================================================ */
.guide-intro{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px;margin-bottom:30px}
.gi-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm)}
.gi-ic{font-size:30px}
.gi-card h3{font-size:18px;margin:8px 0 6px}
.gi-card p{color:var(--ink-soft);font-size:14.5px;margin:0}

.guide-step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px clamp(18px,3vw,30px);margin:18px 0;box-shadow:var(--shadow-sm);scroll-margin-top:84px}
.gs-head{display:flex;align-items:center;gap:14px;margin-bottom:6px}
.gs-n{width:42px;height:42px;border-radius:12px;background:linear-gradient(150deg,var(--blue),var(--violet));color:#fff;font-family:var(--font-head);font-weight:900;font-size:21px;display:grid;place-items:center;flex-shrink:0}
.gs-head h3{font-size:clamp(19px,2.6vw,25px)}
.gs-sub{color:var(--ink-soft);font-size:15px;margin:0 0 18px}

.tool-card{position:relative}
.tool-card.recommend{border-color:var(--gold)}
.tool-badge{position:absolute;top:-10px;right:14px;background:var(--gold);color:#fff;font-size:10.5px;font-weight:800;padding:3px 10px;border-radius:20px;letter-spacing:.04em}

.tabs{display:flex;gap:8px;margin:0 0 18px;flex-wrap:wrap}
.tab{font-weight:700;font-size:15px;padding:11px 20px;border-radius:12px;border:1.5px solid var(--line-2);background:var(--surface);color:var(--ink-soft);cursor:pointer;transition:all .14s}
.tab:hover{border-color:var(--gold);color:var(--ink)}
.tab.active{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.tabpane{display:none}
.tabpane.active{display:block;animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

.attach-grid{display:grid;grid-template-columns:minmax(240px,1fr) 1.3fr;gap:24px;align-items:center}
.attach-figure{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px}
.attach-figure svg{width:100%;height:auto;display:block}
.attach-steps{margin:0;padding-left:22px;display:grid;gap:11px}
.attach-steps li{font-size:15px;color:var(--ink-soft);line-height:1.5}
.attach-steps b{color:var(--ink)}
.attach-note{margin-top:16px;background:var(--violet-soft);border-radius:10px;padding:12px 16px;font-size:14px;color:var(--ink)}

.walk{margin:24px 0;background:linear-gradient(150deg,var(--violet-soft),var(--gold-soft));border:1px solid var(--line);border-radius:var(--radius);padding:24px clamp(18px,3vw,28px)}
.walk h3{font-size:20px;margin-bottom:18px;text-align:center}
.walk-flow{display:flex;align-items:stretch;gap:8px;flex-wrap:wrap;justify-content:center}
.walk-step{flex:1;min-width:150px;max-width:200px;background:var(--surface);border:1px solid var(--line-2);border-radius:12px;padding:14px;text-align:center;box-shadow:var(--shadow-sm)}
.walk-step span{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:8px;background:var(--blue);color:#fff;font-weight:800;font-family:var(--font-head);margin-bottom:8px}
.walk-step.done span{background:var(--green)}
.walk-step p{margin:0;font-size:13.5px;color:var(--ink-soft)}
.walk-step b{color:var(--ink)}
.walk-arrow{display:flex;align-items:center;color:var(--gold);font-size:22px;font-weight:800}
@media (max-width:720px){.walk-arrow{transform:rotate(90deg)}}

.legend{display:flex;gap:18px;flex-wrap:wrap;justify-content:center;margin-top:14px}
.lg{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--ink-soft);font-weight:600}
.dot{width:11px;height:11px;border-radius:50%;display:inline-block}
.dot-green{background:var(--green)}.dot-amber{background:var(--gold)}.dot-blue{background:var(--blue-2)}

/* group header in stream */
.group-head{margin:46px 0 8px;display:flex;align-items:center;gap:12px}
.group-head::before,.group-head::after{content:'';flex:1;height:2px;background:linear-gradient(90deg,transparent,var(--line-2),transparent)}
.group-head h3{font-family:var(--font-head);font-size:clamp(18px,2.5vw,24px);color:var(--violet);font-weight:800;white-space:nowrap}

/* reliability dots on cards */
.rel{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;color:var(--ink-faint)}
.card-rel{margin-bottom:10px}

/* modal v2 fields */
.modal-eff{background:var(--green-soft);border-radius:var(--radius-sm);padding:14px 18px;margin-bottom:14px}
.modal-eff h4,.modal-fix h4{font-size:14px;margin:0 0 8px;color:var(--ink)}
.modal-eff ol{margin:0;padding-left:20px}
.modal-eff li{font-size:14px;color:var(--ink-soft);margin:4px 0}
.modal-fix{background:#fff4e6;border:1px solid var(--gold-soft);border-radius:var(--radius-sm);padding:13px 18px;margin-bottom:16px;font-size:14px;color:var(--ink)}
[data-theme=dark] .modal-fix{background:var(--gold-soft)}
.modal-fix b{color:var(--gold)}

@media (max-width:720px){
  .attach-grid{grid-template-columns:1fr}
}

/* ============================================================
   v3 - grain, reveal, Learn 10x, Feedback
   ============================================================ */
.grain{position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.035;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");}
[data-theme="dark"] .grain{opacity:.05}

.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}
.hero .reveal:nth-child(1){transition-delay:.02s}
.hero .reveal:nth-child(2){transition-delay:.10s}
.hero .reveal:nth-child(3){transition-delay:.18s}
.hero .reveal:nth-child(4){transition-delay:.26s}
.hero .reveal:nth-child(5){transition-delay:.34s}
.hero .reveal:nth-child(6){transition-delay:.42s}
.hero .reveal:nth-child(7){transition-delay:.50s}

.hero-note{margin:22px auto 0;max-width:560px;background:var(--surface);border:1px solid var(--line);border-radius:30px;padding:10px 20px;font-size:14.5px;color:var(--ink-soft);box-shadow:var(--shadow-sm)}
.hero-note a{font-weight:700}

/* tool badge variants already styled; Top pick reuse */
.tool-badge{background:linear-gradient(150deg,var(--gold),#d9a84a)}

/* ---------- LEARN 10x ---------- */
.learn-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.learn-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-sm);transition:transform .15s,box-shadow .15s,border-color .15s}
.learn-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--gold)}
.learn-top{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.learn-ic{font-size:24px}
.learn-top h3{font-size:18px;font-weight:700}
.learn-what{color:var(--ink-soft);font-size:14px;margin:0 0 12px}
.learn-prompt{background:var(--surface-2);border:1px solid var(--line-2);border-radius:var(--radius-sm);padding:12px 14px;font-family:var(--font-mono);font-size:12px;line-height:1.55;color:var(--ink);margin-bottom:14px;flex:1;max-height:180px;overflow:auto}
.learn-copy{margin-top:auto}
.learn-foot{text-align:center;color:var(--ink-soft);font-size:15px;margin-top:26px;font-style:italic;max-width:680px;margin-inline:auto}

/* ---------- FEEDBACK ---------- */
.fb-wrap{display:grid;grid-template-columns:1fr;gap:24px;max-width:760px;margin:0;align-items:start}
.fb-form{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm)}
.fb-label{display:block;font-weight:700;font-size:14px;margin:14px 0 7px;color:var(--ink)}
.fb-label:first-child{margin-top:0}
.fb-input{width:100%;padding:12px 14px;font-size:15px;font-family:var(--font-body);border:1.5px solid var(--line-2);border-radius:11px;background:var(--paper-2);color:var(--ink)}
.fb-input:focus{outline:none;border-color:var(--violet);box-shadow:0 0 0 4px var(--violet-soft)}
textarea.fb-input{resize:vertical}
.fb-actions{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}
.fb-actions .btn{font-size:15px;padding:12px 22px}
.fb-hint{font-size:13px;color:var(--ink-faint);margin:12px 0 0}

[hidden]{display:none!important}

/* ---------- MORE TOOLS ---------- */
.more-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:18px}
.more-card{display:flex;flex-direction:column;gap:6px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);color:var(--ink)!important;text-decoration:none!important;transition:transform .15s,box-shadow .15s,border-color .15s}
.more-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--gold)}
.more-ic{font-size:30px}
.more-card b{font-family:var(--font-head);font-weight:700;font-size:18px}
.more-desc{color:var(--ink-soft);font-size:14px;flex:1}
.more-go{color:var(--blue-2);font-weight:700;font-size:14px;margin-top:4px}
.more-foot{text-align:center;color:var(--ink-soft);font-size:14.5px;margin-top:24px}

/* ============================================================
   v4 - tool buttons, export buttons, result count, mobile search
   ============================================================ */
.card-actions{flex-wrap:wrap}
.btn-tool{flex:1 1 auto;min-width:106px;display:inline-flex;align-items:center;justify-content:center;gap:6px;font-weight:700;font-size:13px;padding:10px 12px;border-radius:11px;border:1.5px solid var(--line-2);background:var(--surface);color:var(--ink);cursor:pointer;transition:transform .12s,box-shadow .12s,border-color .12s}
.btn-tool:hover{transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.btn-tool.t-gpt{border-color:#10a37f;color:#0e8e6e}
.btn-tool.t-claude{border-color:#cc7a4b;color:#bf6b3a}
[data-theme=dark] .btn-tool.t-gpt{color:#3ecfa6}
[data-theme=dark] .btn-tool.t-claude{color:#e69a6a}

.card-fmt{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-top:11px;padding-top:11px;border-top:1px dashed var(--line)}
.fmt-label{font-size:11.5px;color:var(--ink-faint);font-weight:700}
.fmt-btn{font-size:12px;font-weight:700;padding:6px 10px;border-radius:9px;border:1px solid var(--line-2);background:var(--surface-2);color:var(--ink-soft);cursor:pointer;transition:background .12s,color .12s,transform .12s}
.fmt-btn:hover{background:var(--gold-soft);color:var(--ink);transform:translateY(-1px)}
.fmt-btn.done{background:var(--green-soft);color:var(--green)}
.card-more{margin-left:auto;font-size:12.5px;font-weight:700;color:var(--blue-2);background:none;border:none;cursor:pointer;text-decoration:underline}

.result-count{font-size:13.5px;color:var(--ink-soft);margin:0 0 12px;text-align:center}
.result-count b{color:var(--ink);font-weight:800}
.search-clear{position:absolute;right:10px;top:50%;transform:translateY(-50%);width:30px;height:30px;border-radius:50%;border:none;background:var(--surface-2);color:var(--ink-soft);font-size:20px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center}
.search-clear:hover{background:var(--line-2)}

.modal-open{background:var(--surface-2);border-radius:var(--radius-sm);padding:12px 14px;margin-bottom:14px}
.mo-lbl{display:block;font-size:13px;font-weight:700;color:var(--ink-soft);margin-bottom:8px}
.mo-btns{display:flex;gap:8px;flex-wrap:wrap}
.mo-btns .btn-tool{flex:1;min-width:150px;font-size:14px;padding:12px}
.modal-lbl{font-size:12px;font-weight:800;letter-spacing:.08em;color:var(--gold);margin-bottom:6px}
.modal-fmt-note{font-size:12.5px;color:var(--ink-faint);margin:10px 0 0;line-height:1.5}
.modal-actions{flex-wrap:wrap}
.modal-actions .fmt-btn{font-size:12.5px;padding:10px 12px}

/* mobile: compact, swipeable filter bar so search results stay visible */
@media (max-width:760px){
  .library-controls{top:60px;padding:10px 0 10px}
  .filter-chips{flex-wrap:nowrap;overflow-x:auto;justify-content:flex-start;padding-bottom:5px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .filter-chips::-webkit-scrollbar{display:none}
  .fchip{flex:0 0 auto}
  .legend{font-size:11px;gap:10px}
  .result-count{margin-bottom:8px}
  .btn-tool{font-size:12.5px;min-width:88px;padding:9px 8px}
  .card-more{margin-left:0}
}

/* ============================================================
   v5 - cleaner, more attractive card actions
   ============================================================ */
.card-open{display:flex;gap:8px;flex-wrap:wrap;margin-top:2px}
.card-open>button{flex:1 1 30%;min-width:96px;font-size:13px;font-weight:700;padding:10px 8px;border-radius:11px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1.5px solid var(--line-2);transition:transform .12s,box-shadow .12s,filter .12s}
.card-open>button:hover{transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.btn-tool.t-gpt{background:#e6f6f0;border-color:#1aa583;color:#0b7a5e}
.btn-tool.t-claude{background:#fcecdf;border-color:#d98a52;color:#ad5f29}
.btn-soft{background:var(--surface);color:var(--ink)}
.btn-soft.done{background:var(--green-soft);color:var(--green);border-color:var(--green)}
[data-theme=dark] .btn-tool.t-gpt{background:#12302a;color:#63d6b2;border-color:#1aa583}
[data-theme=dark] .btn-tool.t-claude{background:#33241a;color:#eaa471;border-color:#d98a52}
.card-more{display:block;width:100%;margin-top:11px;padding:11px 0 2px;border:none;border-top:1px dashed var(--line);background:none;color:var(--blue-2);font-weight:700;font-size:12.8px;cursor:pointer;text-align:center}
.card-more:hover{color:var(--violet);text-decoration:underline}

/* ============================================================
   v6 - equal-sized card buttons (ChatGPT/Claude primary)
   ============================================================ */
.card-open{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:2px}
.card-open>button{width:100%;min-width:0;font-size:13.5px;font-weight:700;padding:12px 8px;border-radius:12px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1.5px solid var(--line-2);transition:transform .12s,box-shadow .12s}
.card-open>button:hover{transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.card-copy{display:flex;align-items:center;justify-content:center;gap:6px;width:100%;margin-top:8px;font-size:13.5px;font-weight:700;padding:11px;border-radius:12px;border:1.5px solid var(--line-2);background:var(--surface);color:var(--ink);cursor:pointer;transition:transform .12s,box-shadow .12s}
.card-copy:hover{transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.card-copy.done{background:var(--green-soft);color:var(--green);border-color:var(--green)}
.card-more{display:block;width:100%;margin-top:9px;padding-top:9px;border:none;border-top:1px dashed var(--line);background:none;color:var(--blue-2);font-weight:700;font-size:12.5px;cursor:pointer;text-align:center}
.card-more:hover{color:var(--violet);text-decoration:underline}

/* ============================================================
   v7 - Copy as the primary (works everywhere incl. phone apps)
   ============================================================ */
.card-copy-main{width:100%;margin-top:2px;padding:12px;border-radius:12px;border:none;cursor:pointer;font-weight:700;font-size:14px;background:linear-gradient(150deg,var(--blue),var(--violet));color:#fff;display:flex;align-items:center;justify-content:center;gap:7px;box-shadow:var(--shadow-sm);transition:transform .12s,box-shadow .12s}
.card-copy-main:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.card-copy-main.done{background:linear-gradient(150deg,var(--green),#3a9c6a)}
.card-open{margin-top:8px}
.lib-tip{max-width:680px;margin:10px auto 0;text-align:center;font-size:13px;color:var(--ink-soft);background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:9px 16px}
.lib-tip b{color:var(--ink)}

/* ============================================================
   v8 - accessibility & contrast
   ============================================================ */
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--violet);outline-offset:2px;border-radius:8px}
html:not([data-theme="dark"]){--ink-faint:#6f6a60}
.card-what{font-size:14.5px}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1!important;transform:none!important}
}

/* ============================================================
   Phase 2 - Trust section + report link
   ============================================================ */
.trust-card{max-width:920px;margin:0 auto;text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(28px,4vw,46px);box-shadow:var(--shadow)}
.trust-card .kicker{margin-bottom:14px}
.trust-card>h2{font-size:clamp(24px,3.6vw,36px);font-weight:800;letter-spacing:-.02em}
.trust-card>p{color:var(--ink-soft);font-size:16px;line-height:1.6;margin:14px auto 26px;max-width:660px}
.trust-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px;text-align:left;margin-bottom:28px}
.tg{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px}
.tg span{font-size:24px;line-height:1}
.tg b{display:block;font-family:var(--font-head);font-size:16px;margin:8px 0 4px}
.tg p{color:var(--ink-soft);font-size:13.5px;margin:0;line-height:1.5}
.trust-card .btn-primary{font-size:17px;padding:15px 32px}
.trust-note{color:var(--ink-faint);font-size:13.5px;margin:16px 0 0;font-style:italic}
.modal-report{margin:12px 0 0;text-align:center}
.modal-report a{color:var(--ink-faint);font-size:13px;font-weight:600}
.modal-report a:hover{color:var(--rose)}

/* ============================================================
   Phase 3 - Paper Builder + fill-the-blanks
   ============================================================ */
.builder{max-width:820px;margin:0 auto}
.builder-form{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(20px,3vw,30px);box-shadow:var(--shadow-sm);display:grid;gap:14px}
.bf-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.builder-form label{display:flex;flex-direction:column;gap:6px;font-weight:700;font-size:13.5px;color:var(--ink)}
.builder-form select,.builder-form input{padding:11px 13px;font-size:15px;font-family:var(--font-body);border:1.5px solid var(--line-2);border-radius:11px;background:var(--paper-2);color:var(--ink)}
.builder-form select:focus,.builder-form input:focus{outline:none;border-color:var(--violet);box-shadow:0 0 0 4px var(--violet-soft)}
.builder-form .btn-primary{margin-top:4px;justify-content:center}
.builder-out{margin-top:18px}
.builder-out .card-open{margin-top:8px}
.builder-tip{font-size:13px;color:var(--ink);margin:12px 0 0;background:var(--violet-soft);border-radius:10px;padding:10px 14px}
@media (max-width:560px){.bf-row{grid-template-columns:1fr}}

.modal-fill{margin:0 0 14px;border:1px solid var(--line-2);border-radius:var(--radius-sm);background:var(--paper-2);padding:2px 14px}
.modal-fill summary{cursor:pointer;font-weight:700;font-size:14px;padding:11px 0;color:var(--violet)}
.mf-note{font-size:12.5px;color:var(--ink-soft);margin:0 0 10px}
.mf-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding-bottom:12px}
.mf-f{display:flex;flex-direction:column;gap:4px;font-size:12px;font-weight:600;color:var(--ink-soft)}
.mf-f span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mf-f input,.mf-f textarea{padding:8px 10px;font-size:14px;font-family:var(--font-body);border:1.5px solid var(--line-2);border-radius:9px;background:var(--surface);color:var(--ink);resize:vertical}
.mf-f input:focus,.mf-f textarea:focus{outline:none;border-color:var(--violet)}
@media (max-width:560px){.mf-grid{grid-template-columns:1fr}}

/* ============================================================
   Phase 1 product shell · AUD-B/B1/B2/B3
   Outcome-led brand, disciplined 8px rhythm, and accessible tone.
   ============================================================ */
:root{
  --brand-1:#6c5ce7;
  --brand-2:#4834d4;
  --brand-soft:#eeeafd;
  --paper:#f7f4ed;
  --paper-2:#f1ede4;
  --surface:#fff;
  --surface-2:#f3f0e9;
  --ink:#202532;
  --ink-soft:#505866;
  --ink-faint:#687180;
  --line:#ddd8cd;
  --line-2:#cbc4b6;
  --blue:#334b78;
  --blue-2:#334b78;
  --gold:#785519;
  --gold-soft:#f4e6bd;
  --violet:#513bc1;
  --violet-soft:#eeeafd;
  --green:#216b44;
  --green-soft:#e2f3e8;
  --rose:#9a3f56;
  --space-1:8px;
  --space-2:16px;
  --space-3:24px;
  --space-4:32px;
  --space-5:40px;
  --space-6:48px;
  --space-8:64px;
  --space-12:96px;
  --ease-out:cubic-bezier(.2,.75,.25,1);
  --motion-fast:180ms;
  --shadow-sm:0 1px 2px rgba(32,37,50,.07),0 4px 12px rgba(32,37,50,.05);
  --shadow:0 12px 30px rgba(32,37,50,.11),0 2px 8px rgba(32,37,50,.06);
  --shadow-lg:0 28px 70px rgba(32,37,50,.18);
}

[data-theme="dark"]{
  --paper:#151a26;
  --paper-2:#191f2c;
  --surface:#1e2433;
  --surface-2:#283044;
  --ink:#f7f5ef;
  --ink-soft:#d0cec6;
  --ink-faint:#b5b3ac;
  --line:#39445c;
  --line-2:#4a5670;
  --blue:#b8c7f0;
  --blue-2:#c7d3f5;
  --gold:#f0ca7a;
  --gold-soft:#44391f;
  --violet:#d0c8ff;
  --violet-soft:#34304f;
  --green:#a4e2ba;
  --green-soft:#263b31;
  --rose:#f0adbe;
  --brand-soft:#34304f;
  --shadow-sm:0 2px 10px rgba(3,7,18,.26);
  --shadow:0 14px 34px rgba(3,7,18,.38);
  --shadow-lg:0 30px 72px rgba(3,7,18,.55);
}

body{background-image:none}

/* Phase 1 · AUD-B/B2: uniform subject-tile logo, with no cramped byline. */
.site-head{
  min-height:72px;
  gap:var(--space-2);
  padding:var(--space-1) clamp(16px,3vw,40px);
  background:color-mix(in srgb,var(--paper) 94%,transparent);
  backdrop-filter:saturate(120%) blur(12px);
}
.brand{gap:10px;flex:0 0 auto;min-width:0}
.brand-tile{display:block;width:48px;height:48px;flex:0 0 48px;border-radius:16%;box-shadow:var(--shadow-sm)}
.brand-tile svg{display:block;width:100%;height:100%;overflow:visible}
.brand-name{font-family:var(--font-head);font-size:18px;font-weight:700;line-height:1.05;letter-spacing:-.02em;white-space:nowrap}
.head-nav{min-width:0;gap:2px}
.head-nav a{font-size:13px;padding:8px 9px;transition:color var(--motion-fast) var(--ease-out),background var(--motion-fast) var(--ease-out)}
.theme-btn{flex:0 0 44px;width:44px;height:44px;transition:transform var(--motion-fast) var(--ease-out),background var(--motion-fast) var(--ease-out)}
.lang-switch{
  flex:0 1 auto;
  max-width:min(44vw,430px);
  margin:0!important;
  padding-bottom:2px;
  gap:4px!important;
  min-width:0;
  overflow-x:auto;
  overscroll-behavior-inline:contain;
  scrollbar-width:thin;
}
.lang-switch .lang-chip{flex:0 0 auto;min-height:40px;padding:7px 11px}
.ppage-lang-switch{
  display:grid!important;
  grid-template-columns:repeat(auto-fit,minmax(72px,1fr));
  gap:6px;
  overflow:visible;
}
.ppage-lang-switch .lang-chip{width:100%;min-width:0;justify-content:center}
[lang="hi"] [data-i18n],[lang="bn"] [data-i18n],[lang="mr"] [data-i18n],[lang="te"] [data-i18n]{line-height:1.35}
.builder-form label>span[data-i18n]{display:block;min-height:1.35em}

/* Phase 1 · AUD-B/B1: left-led hero with one restrained mathematical visual. */
.hero{
  padding:var(--space-12) clamp(16px,4vw,40px) 80px;
  background:var(--paper);
  isolation:isolate;
}
.hero-glow{background:none}
.hero-inner{
  display:grid;
  grid-template-columns:minmax(0,1.18fr) minmax(330px,.82fr);
  gap:clamp(40px,6vw,72px);
  align-items:center;
  max-width:var(--maxw);
  text-align:left;
}
.hero-copy{min-width:0}
.eyebrow{font-size:13px;line-height:1.45;margin:0 0 var(--space-2);color:var(--gold)}
.hero h1{font-size:clamp(40px,6vw,64px);font-weight:900;letter-spacing:-.02em;max-width:760px}
.hero h1 em{color:var(--brand-2);font-weight:700}
[data-theme="dark"] .hero h1 em{color:var(--violet)}
.lede{font-size:clamp(16px,1.7vw,19px);line-height:1.55;max-width:720px;margin:var(--space-3) 0 0}
.hero-cta{justify-content:flex-start;margin-top:var(--space-4)}
.btn{
  min-height:48px;
  padding:12px var(--space-3);
  border-radius:12px;
  transition:transform var(--motion-fast) var(--ease-out),box-shadow var(--motion-fast) var(--ease-out),background-color var(--motion-fast) var(--ease-out),border-color var(--motion-fast) var(--ease-out);
}
.btn-primary{background:var(--brand-2);box-shadow:var(--shadow);color:#fff}
.btn-primary:hover{box-shadow:var(--shadow-lg)}
.hero-note{
  max-width:680px;
  margin:var(--space-3) 0 0;
  padding:12px var(--space-2);
  border:0;
  border-left:3px solid var(--brand-1);
  border-radius:0 10px 10px 0;
  background:var(--surface-2);
  box-shadow:none;
}
.hero-stats{justify-content:flex-start;gap:var(--space-4);margin-top:var(--space-4)}
.stat{align-items:flex-start}
.stat-num{font-size:clamp(25px,3vw,32px);color:var(--brand-2)}
[data-theme="dark"] .stat-num{color:var(--violet)}
.stat-lbl{font-size:12px;margin-top:4px;color:var(--ink-faint)}
.hero-outcomes{
  position:relative;
  overflow:hidden;
  padding:var(--space-3);
  border:1px solid var(--line);
  border-radius:20px;
  background:var(--surface);
  box-shadow:var(--shadow);
  color:var(--brand-1);
}
.hero-math-art{display:block;width:100%;height:auto;margin:-20px 0 -10px}
.hero-outcomes-kicker{margin:0 0 12px;color:var(--ink-faint);font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase}
.outcome-list{display:grid;gap:0;margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}
.outcome-list li{display:grid;grid-template-columns:32px minmax(118px,.75fr) 1fr;gap:var(--space-1);align-items:center;min-height:48px;border-bottom:1px solid var(--line);color:var(--ink)}
.outcome-list li:last-child{border-bottom:0}
.outcome-list span{font-family:var(--font-mono);font-size:12px;color:var(--brand-2)}
.outcome-list b{font-family:var(--font-head);font-size:16px}
.outcome-list small{font-size:13px;color:var(--ink-soft)}

/* Phase 1 · AUD-A/A1/A2 + AUD-D/D1: two-tap quick-start scaffold. */
.quick-start-section{padding-top:var(--space-12);padding-bottom:var(--space-12)}
.quick-start-shell{
  display:grid;
  gap:var(--space-3);
  padding:clamp(24px,4vw,48px);
  border:1px solid var(--line);
  border-top:4px solid var(--brand-2);
  border-radius:22px;
  background:var(--surface);
  box-shadow:var(--shadow);
}
.quick-start-head{display:grid;grid-template-columns:minmax(0,.82fr) minmax(260px,1.18fr);column-gap:var(--space-5);align-items:end}
.quick-start-head .kicker{grid-column:1;margin:0 0 var(--space-1);justify-self:start}
.quick-start-head h2{grid-column:1;font-size:clamp(28px,4vw,42px);letter-spacing:-.02em}
.quick-start-head p{grid-column:2;grid-row:1 / span 2;margin:0;color:var(--ink-soft);font-size:16px;max-width:540px}
.quick-step{display:grid;grid-template-columns:230px minmax(0,1fr);gap:var(--space-3);align-items:start;padding-top:var(--space-3);border-top:1px solid var(--line)}
.quick-step-label{display:flex;align-items:center;gap:12px;min-height:44px}
.quick-step-label>span{display:grid;place-items:center;width:40px;height:40px;flex:0 0 40px;border-radius:10px;background:var(--brand-2);color:#fff;font-family:var(--font-head);font-weight:800}
.quick-step-label div{display:grid;gap:1px}
.quick-step-label b{font-size:15px;color:var(--ink)}
.quick-step-label small{font-size:12px;line-height:1.35;color:var(--ink-faint)}
#quickSegment{display:flex;gap:var(--space-1);min-height:44px;overflow-x:auto;scrollbar-width:none;padding-bottom:2px}
#quickSegment::-webkit-scrollbar,.quick-jobs::-webkit-scrollbar{display:none}
.quick-chip,.quick-segment .fchip{
  min-height:44px;
  flex:0 0 auto;
  padding:9px 14px;
  border:1px solid var(--line-2);
  border-radius:999px;
  background:var(--surface);
  color:var(--ink-soft);
  font:700 13px/1.2 var(--font-body);
  cursor:pointer;
  transition:transform var(--motion-fast) var(--ease-out),border-color var(--motion-fast) var(--ease-out),background-color var(--motion-fast) var(--ease-out),color var(--motion-fast) var(--ease-out);
}
.quick-chip:hover,.quick-segment .fchip:hover{transform:translateY(-2px);border-color:var(--brand-1);color:var(--ink)}
.quick-chip.active,.quick-chip[aria-pressed="true"],.quick-segment .fchip.active{background:var(--brand-2);border-color:var(--brand-2);color:#fff}
.quick-jobs{display:grid;grid-template-columns:repeat(5,minmax(112px,1fr));gap:var(--space-1);min-height:104px}
.quick-job{
  position:relative;
  display:flex;
  min-height:104px;
  flex-direction:column;
  align-items:flex-start;
  justify-content:space-between;
  gap:var(--space-1);
  padding:var(--space-2);
  border:1px solid var(--line);
  border-radius:14px;
  background:var(--surface-2);
  color:var(--ink);
  text-align:left;
  cursor:pointer;
  transition:transform var(--motion-fast) var(--ease-out),box-shadow var(--motion-fast) var(--ease-out),border-color var(--motion-fast) var(--ease-out),background-color var(--motion-fast) var(--ease-out);
}
.quick-job:hover,.quick-job:focus-visible{transform:translateY(-2px);border-color:var(--brand-1);box-shadow:var(--shadow-sm);background:var(--surface)}
.quick-job.active,.quick-job[aria-pressed="true"]{border-color:var(--brand-1);background:var(--brand-soft);box-shadow:0 0 0 2px color-mix(in srgb,var(--brand-1) 20%,transparent)}
.quick-job:disabled{cursor:not-allowed;opacity:.48;transform:none;box-shadow:none}
.quick-job-icon{display:grid;place-items:center;width:36px;height:36px;border-radius:9px;background:var(--brand-soft);color:var(--brand-2)}
.quick-job-icon svg{width:22px;height:22px}
.quick-job b{font-family:var(--font-head);font-size:16px;line-height:1.15}
.quick-job small{font-size:12px;line-height:1.35;color:var(--ink-faint)}
.quick-status,.quick-noscript{margin:0;padding:12px var(--space-2);border-radius:10px;background:var(--brand-soft);color:var(--violet);font-size:13px;font-weight:700}
.quick-status>p{margin:0}
.quick-result{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:4px var(--space-2);align-items:center}
.quick-result-kicker{grid-column:1;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--violet)}
.quick-result strong{grid-column:1;color:var(--ink);font-family:var(--font-head);font-size:18px}
.quick-result>span:not(.quick-result-kicker){grid-column:1;color:var(--ink-soft);font-weight:500}
.quick-result .btn{grid-column:2;grid-row:1 / span 3}

/* Phase 1 · AUD-B/B3: 96px section rhythm and one quiet maths accent. */
.section{position:relative;padding:var(--space-12) clamp(16px,4vw,40px)}
.section-tint{background:var(--paper-2);border-block:1px solid var(--line)}
.section::after{
  content:'\2211';
  position:absolute;
  top:64px;
  right:max(20px,calc((100vw - var(--maxw))/2));
  color:var(--brand-2);
  font:700 68px/1 var(--font-head);
  opacity:.055;
  pointer-events:none;
}
.section:nth-of-type(3n)::after{content:'\03c0'}
.section:nth-of-type(3n+1)::after{content:'\221a'}
.quick-start-section::after{content:'f(x)';font-size:42px}
.section-head{text-align:left;max-width:760px;margin:0 0 var(--space-6)}
.section-head .sub{margin:14px 0 0}

/* Phase 1 · AUD-D/D2: compact sticky controls with swipeable 44px chips. */
.library-controls.filter-bar{
  position:relative;
  top:auto;
  z-index:35;
  display:grid;
  gap:var(--space-1);
  margin:0 0 var(--space-3);
  padding:12px;
  border:1px solid var(--line);
  border-radius:16px;
  background:color-mix(in srgb,var(--paper) 94%,transparent);
  backdrop-filter:saturate(120%) blur(14px);
  box-shadow:var(--shadow-sm);
}
.filter-search-row{display:grid;grid-template-columns:minmax(260px,1fr) auto;gap:var(--space-2);align-items:center}
.filter-search-row .search-wrap{width:100%;max-width:none;margin:0}
#search{min-height:44px;padding-block:10px;border-radius:11px}
.filter-search-row .result-count{margin:0;white-space:nowrap;text-align:right}
.filter-row{display:flex;align-items:center;gap:var(--space-1);min-width:0}
.filter-row-label{flex:0 0 52px;color:var(--ink-faint);font-size:12px;font-weight:800;letter-spacing:.06em;text-transform:uppercase}
.filter-chips,.fchips,.facet-mount,.format-mount{min-width:0}
.filter-chips,.filter-row>.fchips,.facet-mount>.fchips,.format-mount>.fchips{display:flex;flex-wrap:nowrap;justify-content:flex-start;gap:var(--space-1);overflow-x:auto;scrollbar-width:thin;padding:1px 0 5px}
.filter-chips::-webkit-scrollbar,.filter-row>.fchips::-webkit-scrollbar,.facet-mount>.fchips::-webkit-scrollbar,.format-mount>.fchips::-webkit-scrollbar{display:block;height:4px}
.facet-mount:empty,.format-mount:empty{display:none}
.fchip{
  min-height:44px;
  flex:0 0 auto;
  padding:9px 13px;
  border-width:1px;
  color:var(--ink-soft);
  transition:transform var(--motion-fast) var(--ease-out),border-color var(--motion-fast) var(--ease-out),background-color var(--motion-fast) var(--ease-out),color var(--motion-fast) var(--ease-out);
}
.fchip:hover{transform:translateY(-1px);border-color:var(--brand-1)}
.fchip.active{background:var(--brand-2);border-color:var(--brand-2);color:#fff}
.library-helper{display:grid;gap:var(--space-1);margin-bottom:var(--space-4)}
.library-helper .legend{margin:0;justify-content:flex-start}
.library-helper .lib-tip{max-width:none;margin:0;text-align:left;box-shadow:none}
.category-mount{justify-content:space-between}
.category-select-wrap{display:flex;align-items:center;gap:var(--space-1);min-width:0;flex:1}
.category-select-wrap .filter-row-label{flex:0 0 72px}
.category-select{width:min(100%,560px);min-height:44px;padding:8px 36px 8px 12px;border:1px solid var(--line-2);border-radius:10px;background:var(--surface);color:var(--ink);font:700 13px/1.2 var(--font-body)}
.clear-filters{min-height:44px;padding:9px 13px;border:1px solid var(--line-2);border-radius:10px;background:var(--surface);color:var(--blue-2);font:800 12px/1 var(--font-body);cursor:pointer;white-space:nowrap}
.clear-filters:hover{border-color:var(--brand-1);background:var(--brand-soft)}
.facet-mount{display:grid;gap:var(--space-1)}
.facet-group{display:flex;align-items:center;gap:var(--space-1);min-width:0}
.facet-group .filter-row-label,.format-mount>.filter-row-label{flex:0 0 72px}
.facet-group>.fchips,.format-mount>.fchips{flex:1}
.library-progress{display:flex;align-items:center;justify-content:space-between;gap:var(--space-2);margin:0 0 var(--space-3);padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink-soft);font-size:13px}
.library-progress strong{color:var(--ink)}
.library-progress .btn{min-height:40px;padding:8px 14px}
.show-more-wrap{display:flex;justify-content:center;gap:var(--space-1);flex-wrap:wrap;margin:var(--space-6) 0 var(--space-2)}

/* Curated Surprise Studio: one deep preview, never an unfiltered random card. */
.surprise-studio{margin:0 0 var(--space-6);padding:clamp(18px,3vw,30px);border:1px solid color-mix(in srgb,var(--brand-1) 35%,var(--line));border-radius:22px;background:radial-gradient(circle at 92% 8%,color-mix(in srgb,var(--gold-soft) 82%,transparent),transparent 34%),linear-gradient(145deg,var(--brand-soft),var(--surface) 46%);box-shadow:var(--shadow)}
.surprise-head{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-3)}
.surprise-head .kicker{margin-bottom:7px}
.surprise-head h3{font-size:clamp(24px,3.4vw,36px);letter-spacing:-.025em}
.surprise-head p{max-width:760px;margin:8px 0 0;color:var(--ink-soft);line-height:1.6}
.surprise-sections{display:flex;gap:8px;margin:var(--space-3) 0;overflow-x:auto;padding:2px 2px 8px;scrollbar-width:thin;scroll-snap-type:inline proximity}
.surprise-chip{flex:0 0 auto;min-height:44px;padding:9px 13px;border:1px solid var(--line-2);border-radius:999px;background:var(--surface);color:var(--ink-soft);font:800 12px/1.2 var(--font-body);cursor:pointer;scroll-snap-align:start}
.surprise-chip span{display:inline-grid;min-width:21px;height:21px;margin-left:4px;place-items:center;border-radius:999px;background:var(--surface-2);font-size:10px}
.surprise-chip:hover:not(:disabled){transform:translateY(-1px);border-color:var(--brand-1)}
.surprise-chip.active{border-color:var(--brand-2);background:var(--brand-2);color:#fff}
.surprise-chip.active span{background:rgba(255,255,255,.2)}
.surprise-chip:disabled{opacity:.42;cursor:not-allowed}
.surprise-stage{min-height:190px}
.surprise-preview{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px var(--space-4);align-items:start;padding:var(--space-3);border:1px solid var(--line);border-radius:16px;background:color-mix(in srgb,var(--surface) 95%,transparent);box-shadow:var(--shadow-sm)}
.surprise-preview .card-tags,.surprise-preview h4,.surprise-preview>p,.surprise-preview .card-rel{grid-column:1}
.surprise-preview h4{font-size:clamp(20px,2.7vw,28px);line-height:1.22}
.surprise-preview>p{max-width:780px;margin:0;color:var(--ink-soft);font-size:15px;line-height:1.6}
.surprise-preview .card-rel{margin:4px 0 0}
.surprise-actions{grid-column:2;grid-row:1 / span 4;display:grid;gap:8px;min-width:220px;align-self:center}
.surprise-actions .btn{justify-content:center}
.surprise-empty{padding:26px;border:1px dashed var(--line-2);border-radius:14px;background:var(--surface);color:var(--ink-soft);text-align:center}

/* Phase 1 · AUD-B/B3 + AUD-E/E1 + AUD-F/F2: outcome-first cards. */
.cards{gap:var(--space-3)}
.card{
  position:relative;
  isolation:isolate;
  min-width:0;
  overflow:visible;
  padding:var(--space-3);
  border-radius:16px;
  transition:transform var(--motion-fast) var(--ease-out),box-shadow var(--motion-fast) var(--ease-out),border-color var(--motion-fast) var(--ease-out);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:var(--line-2)}
.card-tags,.card-topline{display:flex;align-items:flex-start;gap:7px;min-height:28px;flex-wrap:wrap;margin-bottom:12px}
.card-category-chip,.category-icon-chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  min-height:28px;
  padding:4px 9px;
  border-radius:8px;
  background:var(--surface-2);
  color:var(--ink-soft);
  font-size:11px;
  font-weight:800;
}
.card-category-chip svg,.category-icon-chip svg{width:15px;height:15px}
.format-badge,.fmt-badge,.tag-format{
  display:inline-flex;
  align-items:center;
  min-height:28px;
  margin-left:auto;
  padding:4px 9px;
  border:1px solid color-mix(in srgb,var(--brand-1) 34%,var(--line));
  border-radius:8px;
  background:var(--brand-soft);
  color:var(--violet);
  font-size:11px;
  font-weight:800;
  white-space:nowrap;
}
.card-tags>.tag-cat{order:1}
.card-tags>.tag-img,.card-tags>.tag-txt{order:2}
.card-tags>.tag-format{order:3;margin-left:auto}
.card h4{
  display:-webkit-box;
  min-height:45px;
  overflow:hidden;
  -webkit-box-orient:vertical;
  -webkit-line-clamp:2;
  font-size:18px;
  line-height:1.25;
}
.card-what{display:-webkit-box;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:4}
.card-featured::before,.featured-card::before{
  content:'';
  position:absolute;
  inset:-1px;
  z-index:-1;
  border-radius:17px;
  background:linear-gradient(135deg,var(--brand-1),var(--brand-2));
}
.card-featured,.featured-card{border-color:transparent;box-shadow:0 10px 28px color-mix(in srgb,var(--brand-2) 13%,transparent)}
.card-action-slots,.card-utility-actions{display:flex;align-items:center;gap:var(--space-1);margin-top:var(--space-1)}
.card-secondary{display:grid;grid-template-columns:minmax(0,1fr) 44px 44px;gap:var(--space-1);align-items:center;margin-top:var(--space-1)}
.card-secondary .card-more{width:auto;margin:0;padding:10px 8px;border:1px solid color-mix(in srgb,var(--brand-1) 26%,var(--line));border-radius:10px;background:var(--brand-soft);text-align:left;text-decoration:none}
.card-icon-action,.card-share,.card-save{
  display:inline-flex;
  min-width:44px;
  min-height:44px;
  align-items:center;
  justify-content:center;
  gap:6px;
  padding:9px 11px;
  border:1px solid var(--line-2);
  border-radius:10px;
  background:var(--surface);
  color:var(--ink-soft);
  font:700 12px/1 var(--font-body);
  cursor:pointer;
  transition:transform var(--motion-fast) var(--ease-out),border-color var(--motion-fast) var(--ease-out),color var(--motion-fast) var(--ease-out),background-color var(--motion-fast) var(--ease-out);
}
.card-icon-action:hover,.card-share:hover,.card-save:hover{transform:translateY(-2px);border-color:var(--brand-1);color:var(--ink)}
.card-save.active,.card-save[aria-pressed="true"]{background:var(--brand-soft);border-color:var(--brand-1);color:var(--violet)}

/* Phase 1 · AUD-C/C1/C2: visual homes for app-generated return shelves. */
.shelf,.discovery-shelf{margin:0 0 var(--space-6);padding:var(--space-3);border:1px solid var(--line);border-radius:18px;background:var(--surface)}
.shelf-head,.discovery-shelf-head{display:flex;align-items:end;justify-content:space-between;gap:var(--space-2);margin-bottom:var(--space-2)}
.shelf-head h3,.discovery-shelf-head h3{font-size:22px}
.shelf-head p,.discovery-shelf-head p{margin:0;color:var(--ink-faint);font-size:13px}
.shelf .cards,.discovery-shelf .cards{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(290px,360px);grid-template-columns:none;overflow-x:auto;overscroll-behavior-inline:contain;scroll-snap-type:inline proximity;padding:2px 2px 12px;scrollbar-width:thin}
.shelf .card,.discovery-shelf .card{scroll-snap-align:start}
.shelf--daily{border-left:4px solid var(--brand-2);background:linear-gradient(90deg,var(--brand-soft),var(--surface) 34%)}
.shelf--saved{border-left:4px solid var(--gold);background:linear-gradient(90deg,var(--gold-soft),var(--surface) 34%)}
.shelf--recent{border-left:4px solid var(--green);background:linear-gradient(90deg,var(--green-soft),var(--surface) 34%)}

/* Contrast corrections for existing chips and badges. */
.tool-badge{background:var(--gold-soft);border:1px solid color-mix(in srgb,var(--gold) 32%,var(--line));color:#3b2b0b}
[data-theme="dark"] .tool-badge{color:#fff4d4}
.tag-img{background:var(--green-soft);color:var(--green)}
.tag-txt{background:var(--violet-soft);color:var(--violet)}

/* One load stagger; every interaction remains a 150–200ms ease-out. */
.reveal{transition-duration:520ms;transition-timing-function:var(--ease-out)}
@keyframes mps-hero-enter{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.hero .reveal{opacity:1;transform:none}
.hero .hero-outcomes.reveal{animation:mps-hero-enter 420ms var(--ease-out) both}
@keyframes mps-card-enter{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.cards.is-initial-load .card:nth-child(-n+6){animation:mps-card-enter 420ms var(--ease-out) both}
.cards.is-initial-load .card:nth-child(2){animation-delay:40ms}
.cards.is-initial-load .card:nth-child(3){animation-delay:80ms}
.cards.is-initial-load .card:nth-child(4){animation-delay:120ms}
.cards.is-initial-load .card:nth-child(5){animation-delay:160ms}
.cards.is-initial-load .card:nth-child(6){animation-delay:200ms}

@media (max-width:1120px){
  .head-nav a:nth-child(2),.head-nav a:nth-child(3),.head-nav a:nth-child(6),.head-nav a:nth-child(8){display:none}
}

@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:var(--space-5)}
  .hero-outcomes{max-width:680px}
  .quick-start-head{grid-template-columns:1fr;gap:var(--space-2)}
  .quick-start-head .kicker,.quick-start-head h2,.quick-start-head p{grid-column:1;grid-row:auto}
  .quick-step{grid-template-columns:1fr;gap:var(--space-2)}
  .quick-jobs{grid-template-columns:repeat(5,minmax(128px,1fr));overflow-x:auto;padding-bottom:4px}
}

@media (max-width:760px){
  html{scroll-padding-top:116px}
  .site-head{
    display:grid;
    grid-template-columns:minmax(0,1fr) 44px;
    min-height:0;
    gap:6px 8px;
    padding:8px 12px;
  }
  .head-nav{display:none}
  .brand{grid-column:1;grid-row:1;gap:8px}
  .brand-tile{width:44px;height:44px;flex-basis:44px}
  .brand-name{max-width:none;white-space:normal;font-size:15px;line-height:1.05}
  .lang-switch{
    grid-column:1 / -1;
    grid-row:2;
    display:grid!important;
    grid-template-columns:repeat(auto-fit,minmax(62px,1fr));
    width:100%;
    max-width:none;
    padding:0;
    overflow:visible;
  }
  .lang-switch .lang-chip{width:100%;min-width:0;min-height:44px;padding:8px 4px;font-size:12px;justify-content:center}
  .theme-btn{grid-column:2;grid-row:1;width:44px;height:44px;flex-basis:44px}

  .hero{padding:56px 16px}
  .hero-inner{gap:var(--space-4)}
  .hero h1{font-size:clamp(40px,12vw,52px)}
  .hero-cta{display:grid;grid-template-columns:1fr}
  .hero-cta .btn{justify-content:center}
  .hero-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-3)}
  .hero-outcomes{padding:var(--space-2)}
  .hero-math-art{margin:-14px 0 -8px}
  .outcome-list li{grid-template-columns:28px minmax(104px,.8fr) 1fr}

  .section{padding:56px 16px}
  .section::after{top:36px;right:16px;font-size:48px}
  .quick-start-section{padding-block:56px}
  .quick-start-shell{padding:var(--space-3);border-radius:16px}
  .quick-jobs{grid-auto-flow:column;grid-template-columns:none;grid-auto-columns:minmax(150px,72vw)}
  .quick-result{grid-template-columns:1fr}
  .quick-result .btn{grid-column:1;grid-row:auto;margin-top:var(--space-1);justify-content:center}

  .library-controls.filter-bar{top:116px;margin-inline:-8px;padding:8px;border-radius:12px}
  .filter-search-row{grid-template-columns:1fr;gap:4px}
  .filter-search-row .result-count{text-align:left;padding-inline:4px;white-space:normal}
  .filter-row{align-items:flex-start}
  .filter-row-label{flex-basis:48px;padding-top:13px}
  .category-mount{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center}
  .category-select-wrap{display:grid;grid-template-columns:48px minmax(0,1fr)}
  .category-select-wrap .filter-row-label{padding-top:0;align-self:center}
  .category-select{width:100%}
  .facet-group{align-items:flex-start}
  .filter-chips,.filter-row>.fchips,.facet-mount>.fchips,.format-mount>.fchips{padding-bottom:4px}
  .library-helper .legend{flex-wrap:nowrap;justify-content:flex-start;overflow-x:auto;padding-bottom:4px}
  .library-helper .lg{flex:0 0 auto}
  .cards{grid-template-columns:1fr;gap:var(--space-2)}
  .library-progress{align-items:flex-start;flex-direction:column}
  .library-progress .btn{width:100%;justify-content:center}
  .surprise-studio{padding:16px;border-radius:16px}
  .surprise-preview{grid-template-columns:1fr;padding:16px}
  .surprise-actions{grid-column:1;grid-row:auto;min-width:0;margin-top:8px}
}

@media (max-width:430px){
  .brand-name{font-size:13px}
  .lang-switch .lang-chip{padding-inline:3px;font-size:11px}
  .ppage-lang-switch{grid-template-columns:repeat(2,minmax(0,1fr))}
  .outcome-list li{grid-template-columns:26px 1fr}
  .outcome-list small{grid-column:2}

  /* Keep every legacy auto-fit grid inside genuinely narrow viewports. */
  .steps,.tools-grid,.dl-grid,.guide-intro,.learn-grid,.more-grid,.trust-grid{
    grid-template-columns:minmax(0,1fr);
  }
  .walk-flow{flex-direction:column;align-items:stretch}
  .walk-step{width:100%;max-width:none;min-width:0}
  .walk-arrow{height:24px;flex:0 0 24px;align-self:center;justify-content:center;transform:rotate(90deg)}
}

/* The in-app mobile capture surface can expose a ~195 CSS-pixel layout at 2x.
   This guard keeps that extreme viewport usable without affecting real 390px phones. */
@media (max-width:260px){
  html{scroll-padding-top:210px}
  .site-head{
    grid-template-columns:minmax(0,1fr) 40px;
    display:grid;
    min-height:0;
    padding:8px;
  }
  .brand{gap:6px}
  .brand-tile{width:36px;height:36px;flex-basis:36px}
  .brand-name{max-width:none;font-size:12px;overflow-wrap:anywhere}
  .theme-btn{grid-column:2;grid-row:1;width:40px;height:40px;min-width:40px;min-height:40px}
  .lang-switch{
    grid-column:1 / -1;
    grid-row:2;
    display:grid!important;
    grid-template-columns:1fr 1fr;
    width:100%;
  }
  .lang-switch .lang-chip{width:100%;min-width:0;min-height:44px;padding:8px 4px;justify-content:center}
  .library-controls.filter-bar{top:210px}

  .hero{padding:40px 12px}
  .hero h1{font-size:30px;overflow-wrap:anywhere}
  .hero-stats{grid-template-columns:1fr;gap:var(--space-2)}
  .hero-outcomes,.quick-start-shell,.guide-step,.walk,.tips,.card,.learn-card,.more-card{padding-inline:12px}
  .section{padding-inline:12px}
  .quick-start-shell{padding-block:var(--space-2)}
  .quick-step{min-width:0}
  .builder-form,.fb-form{min-width:0;padding:12px}
  .bf-row,.builder-form label{min-width:0}
  .builder-form select,.builder-form input{width:100%;min-width:0}
  .fb-actions .btn{width:100%;padding-inline:8px;justify-content:center}
  .random-prompt-wrap .fchip{max-width:100%;white-space:normal;justify-content:center}
  .cat-block-head{align-items:flex-start;flex-wrap:wrap}
  .cat-block-head .cat-count{margin-left:0}
  .group-head h3{white-space:normal;text-align:center;overflow-wrap:anywhere}
  .modal-card{margin:2vh 6px;padding-inline:12px}
  .modal-actions .btn-copy,.mo-btns .btn-tool{min-width:0;width:100%;flex-basis:100%}
}

@media (prefers-reduced-motion:reduce){
  .hero .reveal{animation:none!important}
  .cards.is-initial-load .card{animation:none!important}
  .quick-chip,.quick-job,.card,.card-icon-action,.card-share,.card-save{transform:none!important}
}