/* Number Ninjas — shared design system.
   Kid-friendly evolution of the lyrics-bench paper aesthetic:
   warm cream paper + dotted grid, Fraunces display, chunky sticker
   shadows, game-button presses, handwritten annotations. */

:root{
  --paper:#FFF6E9;
  --paper-deep:#FFEBD0;
  --ink:#2E2A45;          /* deep indigo, softer than black */
  --ink-soft:#5F5878;
  --ink-faint:#948CA8;
  --line:#EBD9BC;
  --red:#FF5D45;          /* coral — energy, positives */
  --red-soft:#FFE0DA;
  --teal:#00A896;         /* teal — cool, negatives */
  --teal-soft:#D3F0EC;
  --purple:#7B5EA7;
  --purple-soft:#E8DFF5;
  --gold:#FFB627;
  --gold-soft:#FFEFCB;
  --green:#43AA5C;
  --green-soft:#DDF2E2;
  --card:#FFFDF7;
  --shadow-sticker:4px 4px 0 var(--ink);
  --shadow-soft:0 2px 4px rgba(46,42,69,.08),0 10px 30px rgba(46,42,69,.10);
  --font-display:"Fraunces",Georgia,serif;
  --font-body:"Karla",-apple-system,sans-serif;
  --font-hand:"Gochi Hand",cursive;
  --font-mono:"IBM Plex Mono",ui-monospace,monospace;
  /* darker functional variants for TEXT on paper (≥4.5:1); decorative
     coral/teal stay as they are */
  --coral-ink:#C13A22;   /* 5.03:1 on paper */
  --teal-ink:#00695C;    /* 6.18:1 */
  --green-ink:#2E7D46;   /* 4.74:1 */
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--paper);color:var(--ink);
  font-family:var(--font-body);font-size:17px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
  background-image:radial-gradient(rgba(46,42,69,.05) 1.5px,transparent 1.5px);
  background-size:26px 26px;
}
::selection{background:var(--gold);color:var(--ink)}
a{color:var(--coral-ink)}
.wrap{max-width:1020px;margin:0 auto;padding:0 22px}
.narrow{max-width:660px}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:100;
  background:var(--ink);color:var(--paper);font-family:var(--font-mono);font-size:14px;
  padding:12px 18px;border-radius:0 0 12px 0;text-decoration:none;
}
.skip-link:focus{left:0}

/* ---------- top rail (the "Dojo rail") ---------- */
/* Desktop: brand + Train/Vault/Watch + one language control.
   Phone (<860px): brand + language + a single ☰ sheet holding everything —
   the header never scrolls sideways and never hides a control. */
#rail{
  position:sticky;top:0;z-index:50;
  background:rgba(255,246,233,.94);backdrop-filter:blur(8px);
  border-bottom:2px solid var(--ink);
}
#rail .wrap{display:flex;align-items:center;gap:8px;min-height:56px}
#rail .brand{
  font-family:var(--font-display);font-weight:900;font-size:17px;
  text-decoration:none;color:var(--ink);margin-right:auto;
  display:flex;align-items:center;gap:9px;letter-spacing:.01em;
}
#rail .brand .logo{width:30px;height:30px;flex-shrink:0}
#rail .brand span{color:var(--coral-ink)}
.rail-desktop{display:flex;align-items:center;gap:8px}
.rail-menu{position:relative;flex-shrink:0}
.rail-menu summary,.rail-link{
  list-style:none;cursor:pointer;user-select:none;text-decoration:none;
  font-family:var(--font-mono);font-size:12.5px;color:var(--ink-soft);
  padding:10px 14px;border-radius:99px;border:1.5px solid transparent;
  white-space:nowrap;display:flex;align-items:center;gap:7px;min-height:42px;
}
.rail-menu summary::-webkit-details-marker{display:none}
.rail-menu:not(.rail-sheet):not(.rail-lang) summary::after,
.rail-lang summary::after{content:"▾";font-size:10px;opacity:.7}
.rail-menu summary:hover,.rail-link:hover{border-color:var(--ink);color:var(--ink)}
.rail-menu[open]>summary{color:var(--ink);border-color:var(--ink);background:var(--paper-deep)}
.rail-menu summary:focus-visible,.rail-link:focus-visible,.menu-item:focus-visible{
  outline:3px solid var(--purple);outline-offset:2px;
}
.menu-panel{
  position:absolute;top:calc(100% + 12px);right:0;min-width:250px;max-width:min(92vw,340px);
  z-index:60;max-height:min(70vh,560px);overflow-y:auto;
  background:var(--card);border:2px solid var(--ink);border-radius:16px;
  box-shadow:var(--shadow-sticker);padding:8px;display:flex;flex-direction:column;gap:2px;
}
.menu-item{
  display:flex;gap:10px;align-items:center;text-decoration:none;color:var(--ink);
  font-family:var(--font-body);font-size:14.5px;font-weight:700;
  padding:11px 12px;border-radius:10px;min-height:42px;
}
.menu-item:hover{background:var(--gold-soft)}
.menu-item.active{background:var(--purple-soft);box-shadow:inset 0 0 0 2px var(--purple)}
.menu-item.lang-current{color:var(--ink-soft);cursor:default}
.menu-cat{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-soft);font-weight:500;padding:10px 12px 3px;user-select:none;
}
/* "in English" badge on destinations that are not in the reader's language */
.en-badge{
  font-family:var(--font-mono);font-size:9.5px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ink-soft);border:1.2px solid var(--line);background:var(--paper-deep);
  border-radius:99px;padding:2px 7px;margin-left:auto;flex-shrink:0;font-weight:500;
}
.rail-sheet{display:none}
@media(max-width:860px){
  .rail-desktop{display:none}
  .rail-sheet{display:block}
  #rail .wrap{gap:6px;padding:0 14px}
  .menu-panel{position:fixed;left:10px;right:10px;top:62px;min-width:0;max-width:none;max-height:calc(100vh - 78px)}
}
@media(max-width:380px){
  #rail .brand{font-size:15px}
  #rail .brand .logo{width:26px;height:26px}
  .rail-menu summary{font-size:12px;padding:9px 11px}
}

/* ---------- hero ---------- */
header.hero{padding:64px 0 24px;position:relative;overflow:hidden}
.eyebrow{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--coral-ink);display:flex;align-items:center;gap:12px;
}
.eyebrow::before{content:"";display:block;width:32px;height:3px;background:var(--red);border-radius:2px}
h1{
  font-family:var(--font-display);font-weight:900;font-size:clamp(38px,6.6vw,72px);
  line-height:1.04;letter-spacing:-.015em;margin:18px 0 18px;max-width:17ch;
}
h1 .hl{color:var(--coral-ink)}
h1 .hl2{color:var(--teal-ink)}
.lede{font-size:clamp(17px,2vw,20px);color:var(--ink-soft);max-width:52ch;line-height:1.55}
.lede strong{color:var(--ink)}
.hand{font-family:var(--font-hand);color:var(--purple);font-size:1.15em}

/* ---------- sections ---------- */
section.step{padding:64px 0 20px}
.step-head{display:flex;align-items:baseline;gap:16px;margin-bottom:6px}
.step-no{
  font-family:var(--font-display);font-weight:900;font-size:clamp(50px,6.4vw,76px);
  color:transparent;-webkit-text-stroke:2px var(--red);line-height:1;flex-shrink:0;
}
h2{font-family:var(--font-display);font-weight:800;font-size:clamp(27px,4vw,40px);letter-spacing:-.01em;line-height:1.1}
.prose{max-width:620px;color:var(--ink-soft);font-size:17px}
.prose p{margin-bottom:13px}
.prose strong{color:var(--ink)}
.prose .term{border-bottom:2.5px solid var(--teal);color:var(--ink);font-weight:700}

/* move badge — names each "ninja move" */
.move-badge{
  display:inline-flex;align-items:center;gap:8px;margin:10px 0 14px;
  font-family:var(--font-hand);font-size:20px;color:var(--paper);
  background:var(--purple);padding:5px 16px;border-radius:99px;
  border:2px solid var(--ink);box-shadow:3px 3px 0 var(--ink);
  transform:rotate(-1.5deg);
}

/* ---------- demo cards (widgets live here) ---------- */
.demo{
  background:var(--card);border:2px solid var(--ink);border-radius:20px;
  box-shadow:var(--shadow-sticker);padding:24px;margin-top:28px;position:relative;
}
.demo::before{
  content:attr(data-label);position:absolute;top:-13px;left:20px;
  font-family:var(--font-hand);font-size:16px;letter-spacing:.03em;
  background:var(--ink);color:var(--paper);padding:2px 14px;border-radius:99px;
}
.demo .try-hint{font-family:var(--font-hand);font-size:17px;color:var(--coral-ink);margin-bottom:12px}

/* game buttons */
.gbtn{
  font-family:var(--font-body);font-weight:700;font-size:15px;
  background:var(--gold);color:var(--ink);border:2px solid var(--ink);
  border-radius:12px;padding:9px 16px;cursor:pointer;
  box-shadow:3px 3px 0 var(--ink);transition:transform .08s ease,box-shadow .08s ease;
  user-select:none;
}
.gbtn:hover{transform:translate(-1px,-1px);box-shadow:4px 4px 0 var(--ink)}
.gbtn:active{transform:translate(3px,3px);box-shadow:0 0 0 var(--ink)}
.gbtn.teal{background:var(--teal-ink);color:#fff}
.gbtn.red{background:var(--coral-ink);color:#fff}
.gbtn.purple{background:var(--purple);color:#fff}
.gbtn.ghost{background:var(--card)}
.gbtn:disabled{opacity:.45;cursor:default;transform:none;box-shadow:3px 3px 0 var(--ink)}

/* readout pill */
.readout{
  font-family:var(--font-mono);font-size:14px;background:var(--paper-deep);
  border:2px dashed var(--ink-faint);border-radius:12px;padding:8px 14px;color:var(--ink);
}
.readout b{color:var(--coral-ink)}

/* chapter cards on home */
.chapter-card{
  display:block;text-decoration:none;color:var(--ink);
  background:var(--card);border:2px solid var(--ink);border-radius:22px;
  box-shadow:var(--shadow-sticker);padding:26px;position:relative;
  transition:transform .12s ease,box-shadow .12s ease;
}
.chapter-card:hover{transform:translate(-3px,-3px);box-shadow:7px 7px 0 var(--red)}
.chapter-card .num{
  font-family:var(--font-hand);font-size:17px;color:var(--paper);
  background:var(--red);display:inline-block;padding:2px 13px;border-radius:99px;
  border:2px solid var(--ink);margin-bottom:12px;
}
.chapter-card h3{font-family:var(--font-display);font-weight:800;font-size:24px;margin-bottom:8px;line-height:1.15}
.chapter-card p{font-size:15px;color:var(--ink-soft);line-height:1.5}
.chapter-card .go{font-family:var(--font-hand);font-size:18px;color:var(--coral-ink);margin-top:14px;display:block}
.chapter-card.soon{opacity:.6;cursor:default}
.chapter-card.soon:hover{transform:none;box-shadow:var(--shadow-sticker)}

/* footer */
footer{padding:60px 0 46px;border-top:2px solid var(--ink);margin-top:70px;background:var(--paper-deep)}
footer .wrap{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
footer p{font-size:14px;color:var(--ink-soft)}
footer .logo{width:36px;height:36px}

/* small helpers */
.tag{
  display:inline-block;font-family:var(--font-mono);font-size:12px;
  border:1.5px solid var(--line);background:var(--card);color:var(--ink-soft);
  padding:3px 11px;border-radius:99px;margin:2px;
}
.wiggle{animation:wiggle 3s ease-in-out infinite}
@keyframes wiggle{0%,100%{transform:rotate(-2deg)}50%{transform:rotate(2deg)}}

@media(max-width:640px){
  section.step{padding:48px 0 14px}
  .demo{padding:18px 14px}
}


/* ---------- P1 components ---------- */
/* card metadata chips (dark vault shelf context) */
.vmeta{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.vmeta span{
  font-family:var(--font-mono);font-size:11px;color:#CFC9E0;
  border:1px solid rgba(255,182,39,.45);border-radius:99px;padding:2px 9px;white-space:nowrap;
}
/* quiet local progress chip on vault cards */
.vdone{
  font-family:var(--font-hand);font-size:14px;color:var(--ink);
  background:var(--green-soft);border:1.5px solid var(--green);border-radius:99px;
  padding:1px 10px;margin-left:8px;display:inline-block;
}
/* cast story card accent */
.story.cast{background:var(--purple-soft)}
/* next-mystery pointer at the end of each Vault lesson */
.next-mystery{
  margin:26px 0 0;background:var(--ink);color:var(--paper);
  border:2px solid var(--ink);border-radius:18px;box-shadow:4px 4px 0 var(--gold);
  padding:16px 20px;display:flex;align-items:center;gap:14px;flex-wrap:wrap;
}
.next-mystery .nm-tag{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--gold);
}
.next-mystery b{font-family:var(--font-display);font-size:18px}
.next-mystery a{
  color:var(--gold);font-family:var(--font-hand);font-size:19px;text-decoration:none;
  margin-left:auto;white-space:nowrap;
}
/* predict-before-reveal panel */
.predict{background:var(--gold-soft);border:2px dashed var(--gold);border-radius:16px;padding:16px 18px;margin:0 0 16px}
.predict .pq{font-family:var(--font-display);font-weight:800;font-size:18px;margin-bottom:10px}
.predict-opt{
  font-family:var(--font-mono);font-size:13.5px;background:var(--card);color:var(--ink);
  border:2px solid var(--ink);border-radius:99px;padding:9px 16px;margin:0 8px 8px 0;
  cursor:pointer;box-shadow:2px 2px 0 var(--ink);
}
.predict-opt.chosen{background:var(--purple-soft);border-color:var(--purple);box-shadow:inset 0 0 0 2px var(--purple)}
.predict .pnote{font-family:var(--font-hand);font-size:15px;color:var(--ink-soft);display:none;margin-top:2px}
.predict.locked .pnote{display:block}
/* homepage continue strip */
#continueStrip{
  margin-top:26px;background:var(--card);border:2px solid var(--ink);border-radius:18px;
  box-shadow:var(--shadow-sticker);padding:16px 20px;display:flex;align-items:center;gap:14px;flex-wrap:wrap;
}
#continueStrip .cs-emoji{font-size:30px}
#continueStrip b{font-family:var(--font-display);font-size:18px;display:block}
#continueStrip p{font-size:14px;color:var(--ink-soft);line-height:1.5}
#continueStrip a.cs-go{
  margin-left:auto;font-family:var(--font-hand);font-size:19px;color:var(--coral-ink);
  text-decoration:none;white-space:nowrap;
}

/* respect reduced-motion everywhere */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  html{scroll-behavior:auto}
}

/* ---------- Kannada typography ----------
   Latin faces carry no Kannada glyphs, so without this the page falls back to
   random system fonts. Noto Serif/Sans Kannada are loaded on .kn pages. */
html[lang="kn"] body,html[lang="kn"] .lede,html[lang="kn"] .prose,
html[lang="kn"] .menu-item,html[lang="kn"] .story p{
  font-family:"Noto Sans Kannada","Karla",sans-serif;
}
html[lang="kn"] h1,html[lang="kn"] h2,html[lang="kn"] h3,
html[lang="kn"] .brand,html[lang="kn"] .story h3{
  font-family:"Noto Serif Kannada","Fraunces",Georgia,serif;
}
html[lang="kn"] h1{line-height:1.15;letter-spacing:0}
html[lang="kn"] h2,html[lang="kn"] h3{line-height:1.2}
/* Kannada has no case: uppercasing and wide tracking damage legibility */
html[lang="kn"] .eyebrow,html[lang="kn"] .menu-cat,html[lang="kn"] .vmeta span,
html[lang="kn"] .nm-tag,html[lang="kn"] .demo::before{
  text-transform:none;letter-spacing:.02em;
}
html[lang="kn"] .menu-cat{font-weight:700;color:var(--ink)}
html[lang="kn"] .menu-item{font-size:15px;line-height:1.45}
/* the handwriting face is Latin-only — use a weighted Kannada sans instead */
html[lang="kn"] .hand,html[lang="kn"] .verdict,html[lang="kn"] .try-hint,
html[lang="kn"] .vnum,html[lang="kn"] .move-badge,html[lang="kn"] .go{
  font-family:"Noto Sans Kannada",sans-serif;font-weight:700;color:var(--purple);
}
html[lang="kn"] .move-badge{transform:rotate(-1deg);color:var(--paper)}
html[lang="kn"] .verdict{font-size:16.5px}
/* numerals and formulas stay Latin/monospace */
html[lang="kn"] .stat,html[lang="kn"] code,html[lang="kn"] .mono{font-family:var(--font-mono)}

/* WCAG AA text colours: decorative --red/--teal stay for fills and borders,
   but anything a child READS uses the darker -ink variants. */
.verdict.good{color:var(--green-ink)}
.verdict.bad{color:var(--coral-ink)}
.hand{color:var(--purple)}