/* =========================================================================
   THE FILTER AI · design system
   Tokens + components. Mobile-first, responsive at 640px / 1024px.

   The palette is the one thefilter.hamcodes.com uses: a near-black night
   ground with a blue cast, the star field and moon from stars.js behind it,
   and colour reserved for meaning. Green is allowed or caught, red is an
   attack or a breach, amber is a cost you chose, violet is the paid tier.
   No dividers: sections are separated by space and surface, never by rules.
   ========================================================================= */

:root{
  /* Ground and surfaces */
  --bg:        #05060d;
  --surface:   #0b0d16;
  --surface-2: #10131e;
  --surface-3: #151927;
  --line:      #1f2434;
  --line-soft: #161a27;

  /* Text. --read is body copy (11.4:1 on the ground), --muted is labels. */
  --text:  #eef1f7;
  --read:  #aeb6c6;
  --muted: #8a93a6;

  /* Signal colours. Every one clears WCAG AA on --bg. */
  --safe:   #4ade8a;   /* correct / allow / caught */
  --threat: #ff5a72;   /* attack / breach / wrong  */
  --amber:  #e8b33c;   /* XP / cost / warning      */
  --brand:  #3ddba3;   /* primary CTA / brand      */
  --violet: #a98bff;   /* Pro tier / tags          */

  --brand-hi: #5fe5b5;
  --brand-lo: #2cc08c;
  --on-accent: #06130e;

  --radius: 14px;
  --shadow: 0 16px 40px -30px rgba(0,0,0,.8);

  --mono:    "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --display: "IBM Plex Sans", system-ui, sans-serif;
  --body:    "IBM Plex Sans", system-ui, sans-serif;

  --text-body:    clamp(14.5px, 2.5vw, 16px);
  --text-prompt:  clamp(15px, 3vw, 18px);
  --text-display: clamp(18px, 4vw, 22px);
  --text-mono:    clamp(11px, 2vw, 13px);
}

/* ---------- reset ---------- */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html,body{margin:0;min-height:100vh}
body{
  color:var(--text);
  font-family:var(--body);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
button{font-family:inherit}
a{color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
[hidden]{display:none!important}

/* ---------- the night sky ----------
   stars.js draws the sky and moon on #bgCanvas. The scrim keeps the reading
   column calm and lets the stars show in the margins, the same treatment as
   the landing page. */
#bgCanvas{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:0}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:radial-gradient(125% 75% at 50% 38%,
    rgba(5,6,13,.88) 0%,rgba(5,6,13,.66) 42%,rgba(5,6,13,.18) 72%,transparent 88%);
}

.skip{
  position:absolute;left:-9999px;top:0;z-index:100;
  background:var(--brand);color:var(--on-accent);
  padding:.8rem 1.2rem;border-radius:0 0 10px 0;font-weight:600;text-decoration:none;
}
.skip:focus{left:0}

/* ---------- top bar (every screen) ---------- */
.topbar{
  position:sticky;top:0;z-index:40;
  backdrop-filter:blur(16px) saturate(130%);-webkit-backdrop-filter:blur(16px) saturate(130%);
  background:rgba(5,6,13,.82);
  box-shadow:0 10px 30px -24px rgba(0,0,0,.9);
}
.topbar-in{
  max-width:1220px;margin:0 auto;padding:10px 16px;
  display:flex;align-items:center;gap:10px 18px;flex-wrap:wrap;
}
.tb-brand{display:flex;align-items:center;gap:9px;text-decoration:none;flex:none;margin-right:auto}
.tb-brand img{width:26px;height:26px;filter:drop-shadow(0 0 9px rgba(212,44,80,.3))}
.tb-brand .wordmark{
  font-family:var(--mono);font-weight:700;font-size:12.5px;letter-spacing:.15em;
  text-transform:uppercase;line-height:1;white-space:nowrap;
}
.tb-brand .wordmark .ai{color:var(--brand)}
.pro-badge{
  font-family:var(--mono);font-size:10px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:#120a26;background:linear-gradient(180deg,#c6b2ff,var(--violet));
  border-radius:6px;padding:3px 7px 2px;line-height:1.2;
  box-shadow:0 0 0 1px rgba(169,139,255,.35),0 6px 18px -8px rgba(169,139,255,.8);
}
.free-badge{
  font-family:var(--mono);font-size:10px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:2px 7px 1px;
}
.tb-stats{display:flex;align-items:center;gap:14px;font-family:var(--mono);font-size:13px;font-weight:700;order:2}
.stat-xp{color:var(--amber)}
.stat-streak{color:var(--threat)}

.tb-nav{
  display:flex;align-items:center;gap:4px;order:3;width:100%;
  overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;
  -webkit-mask-image:linear-gradient(90deg,#000 90%,transparent);
          mask-image:linear-gradient(90deg,#000 90%,transparent);
}
.tb-nav::-webkit-scrollbar{display:none}
.tb-nav a{
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--read);text-decoration:none;white-space:nowrap;
  padding:0 12px;min-height:44px;display:inline-flex;align-items:center;gap:6px;
  border-radius:9px;transition:color .15s,background .15s;touch-action:manipulation;
}
.tb-nav a[aria-current="page"]{color:var(--brand);background:rgba(61,219,163,.08)}
.tb-nav a .lock{font-size:10px;color:var(--violet)}
.tb-nav a.tb-cta{color:var(--on-accent);background:var(--brand);font-weight:700;margin-left:auto}
@media (hover:hover){
  .tb-nav a:not([aria-current="page"]):not(.tb-cta):hover{color:var(--text);background:var(--surface-2)}
}
@media (min-width:900px){
  .topbar-in{flex-wrap:nowrap;padding:12px 24px}
  .tb-brand{margin-right:8px}
  .tb-nav{order:0;width:auto;flex:1;-webkit-mask-image:none;mask-image:none}
  .tb-nav a{min-height:38px}
  .tb-stats{order:0}
}

/* ---------- layout ---------- */
.app{
  position:relative;z-index:1;
  max-width:620px;margin:0 auto;padding:20px 16px 64px;
}
.stage{min-width:0}
.levelmap{display:none}

/* Wide views break out of the reading column. */
body.view-hub .app,body.view-range .app,body.view-lab .app{max-width:1220px}

@media (min-width:1024px){
  body.view-course .app{
    max-width:960px;display:grid;grid-template-columns:104px minmax(0,620px);
    justify-content:center;gap:32px;align-items:start;padding-top:28px;
  }
  body.view-course .levelmap{
    display:flex;flex-direction:column;gap:6px;position:sticky;top:96px;
  }
  .levelmap .lm-title{
    font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;
    color:var(--muted);margin-bottom:6px;padding-left:2px;
  }
  .lm-item{
    display:flex;align-items:center;gap:8px;
    font-family:var(--mono);font-size:12px;color:var(--muted);
    padding:5px 8px;border-radius:8px;border:1px solid transparent;
  }
  .lm-item .n{width:20px;text-align:right;font-weight:700}
  .lm-item.done{color:var(--safe)}
  .lm-item.done .n::after{content:" ✓"}
  .lm-item.current{color:var(--text);border-color:var(--line);background:var(--surface)}
  .lm-item.locked{opacity:.45}
  .lm-item .tier{font-size:9px;letter-spacing:.05em;text-transform:uppercase}
}

/* ---------- course HUD line (course view only) ---------- */
.course-hud{margin-bottom:22px}
.course-hud .row{
  display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:8px;
  font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.04em;
}
.course-hud .row b{color:var(--text);font-weight:600}
.progress-track{height:6px;background:var(--surface-2);border-radius:99px;overflow:hidden}
.progress-fill{
  height:100%;width:0;background:linear-gradient(90deg,var(--brand),var(--safe));
  transition:width .45s ease;
}

.kbd{font-family:var(--mono);font-size:11px;color:var(--muted);margin-left:6px}
@media (max-width:639px){ .kbd{display:none} }

/* ---------- shared headings ---------- */
.prompt-line{font-family:var(--display);font-weight:600;font-size:var(--text-prompt);margin:2px 0 12px;line-height:1.4}
.hint{font-family:var(--mono);font-size:var(--text-mono);color:var(--muted);margin-bottom:16px}

/* ---------- TYPE 1: allow / block ---------- */
.inbox{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.inbox-head{
  display:flex;align-items:center;gap:8px;padding:11px 14px;background:var(--surface-2);
  font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);
}
.inbox-head .live{
  width:8px;height:8px;border-radius:50%;background:var(--brand);
  box-shadow:0 0 0 0 rgba(61,219,163,.5);animation:pulse 2s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(61,219,163,.5)}
  70%{box-shadow:0 0 0 7px rgba(61,219,163,0)}
  100%{box-shadow:0 0 0 0 rgba(61,219,163,0)}
}
.inbox-body{padding:16px 15px}
.meta{font-family:var(--mono);font-size:11px;color:var(--muted);margin-bottom:9px}
.ptext{font-size:var(--text-prompt);line-height:1.6;white-space:pre-wrap;word-break:break-word}

.card{margin-top:12px;background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:12px 13px}
.card .from{font-family:var(--mono);font-size:11px;color:var(--muted);margin-bottom:6px}
.card .body{font-size:14px;line-height:1.55;white-space:pre-wrap;word-break:break-word;color:var(--text)}

.verdict-row{display:grid;grid-template-columns:1fr;gap:10px;margin-top:16px}
.vbtn{
  font-family:var(--display);font-weight:600;font-size:15px;
  min-height:56px;padding:14px;border-radius:12px;cursor:pointer;
  border:1px solid var(--line);background:var(--surface-2);color:var(--text);
  transition:transform .1s,border-color .15s,background .15s;touch-action:manipulation;
}
@media (hover:hover){
  .vbtn:hover{transform:translateY(-1px)}
  .vbtn.allow:hover{border-color:var(--safe);background:rgba(74,222,138,.1)}
  .vbtn.block:hover{border-color:var(--threat);background:rgba(255,90,114,.1)}
}

/* ---------- TYPE 2: tap the injection ---------- */
.doc{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.doc-head{
  display:flex;align-items:center;gap:8px;padding:11px 14px;background:var(--surface-2);
  font-family:var(--mono);font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);
}
.doc-head .dot{width:8px;height:8px;border-radius:50%;background:var(--amber)}
.doc-body{padding:16px 15px;font-size:var(--text-prompt);line-height:1.9}

.seg{
  border-radius:6px;padding:2px 3px;cursor:pointer;
  transition:background .12s,box-shadow .12s;
  -webkit-tap-highlight-color:transparent;touch-action:manipulation;
}
.seg:focus-visible{outline:2px solid var(--brand)}
.seg.pick-wrong{background:rgba(255,90,114,.22);box-shadow:inset 0 0 0 1px var(--threat)}
.seg.pick-right{background:rgba(74,222,138,.24);box-shadow:inset 0 0 0 1px var(--safe)}
.seg.reveal{background:rgba(74,222,138,.14);box-shadow:inset 0 0 0 1px rgba(74,222,138,.5)}
.locked .seg{cursor:default}
@media (hover:hover){
  .seg:hover{background:rgba(61,219,163,.12)}
  .locked .seg:hover{background:transparent}
  .locked .seg.pick-wrong:hover{background:rgba(255,90,114,.22)}
  .locked .seg.pick-right:hover,.locked .seg.reveal:hover{background:rgba(74,222,138,.2)}
}
@media (max-width:639px){
  .doc-body{line-height:1.6}
  .seg{display:block;padding:12px;margin:6px 0;min-height:44px;border:1px solid var(--line);background:var(--surface-2)}
}

/* ---------- TYPE 3: name the technique ---------- */
.scenario{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 15px;font-size:var(--text-prompt);line-height:1.6;margin-bottom:16px;white-space:pre-wrap;
}
.opts{display:flex;flex-direction:column;gap:10px}
.opt{
  display:flex;align-items:center;gap:12px;width:100%;text-align:left;
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:14px 15px;color:var(--text);font-family:var(--mono);font-size:14px;
  cursor:pointer;min-height:52px;transition:border-color .15s,background .15s;touch-action:manipulation;
}
.opt .radio{flex:0 0 auto;width:16px;height:16px;border-radius:50%;border:2px solid var(--muted)}
.opt.sel .radio{border-color:var(--brand);background:radial-gradient(circle,var(--brand) 42%,transparent 46%)}
.opt.correct{border-color:var(--safe);background:rgba(74,222,138,.1)}
.opt.correct .radio{border-color:var(--safe);background:radial-gradient(circle,var(--safe) 42%,transparent 46%)}
.opt.wrong{border-color:var(--threat);background:rgba(255,90,114,.1)}
.opt.wrong .radio{border-color:var(--threat);background:radial-gradient(circle,var(--threat) 42%,transparent 46%)}
.opt.dim{opacity:.5}
.opt[disabled]{cursor:default}
@media (hover:hover){ .opt:not([disabled]):hover{border-color:var(--brand)} }
.retry-note{font-family:var(--mono);font-size:12px;color:var(--amber);margin-top:12px;min-height:1px}

/* ---------- feedback ---------- */
.fb{margin-top:16px;border-radius:12px;border:1px solid var(--line);padding:14px 15px;font-size:var(--text-body);line-height:1.6}
.fb.right{background:rgba(74,222,138,.07);border-color:rgba(74,222,138,.3)}
.fb.wrong{background:rgba(255,90,114,.07);border-color:rgba(255,90,114,.35)}
.fb .head{
  font-family:var(--mono);font-weight:700;font-size:12px;letter-spacing:.05em;
  text-transform:uppercase;margin-bottom:9px;display:flex;flex-wrap:wrap;gap:8px;align-items:center;
}
.fb.right .head .res{color:var(--safe)}
.fb.wrong .head .res{color:var(--threat)}
.chip{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.04em;text-transform:uppercase;
  padding:2px 8px;border-radius:999px;border:1px solid var(--line);color:var(--muted);
}
.chip.tech{color:var(--brand);border-color:rgba(61,219,163,.4)}
.chip.safe{color:var(--safe);border-color:rgba(74,222,138,.4)}
.chip.xp{color:var(--amber);border-color:rgba(232,179,60,.4)}

.fb-why{margin-top:2px}
.fb-label{font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:5px}
.fb-text{font-size:var(--text-body);line-height:1.6}
.impact{margin-top:14px;background:var(--surface-2);border-radius:10px;padding:12px 13px}
.impact-label{font-family:var(--mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:5px}
.impact-headline{font-family:var(--display);font-weight:700;font-size:14.5px;line-height:1.35;margin-bottom:5px}
.impact.threat .impact-headline{color:var(--threat)}
.impact.benign .impact-headline{color:var(--amber)}
.impact-detail{font-size:13px;line-height:1.55;color:var(--read)}

/* ---------- exercise topline ---------- */
.ex-topline{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.ex-count{font-family:var(--mono);font-size:var(--text-mono);color:var(--muted);letter-spacing:.04em}
.ex-diff{
  font-family:var(--mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase;
  padding:3px 9px;border-radius:999px;border:1px solid var(--line);color:var(--muted);
}
.ex-diff.easy{color:var(--safe);border-color:rgba(74,222,138,.4)}
.ex-diff.medium{color:var(--amber);border-color:rgba(232,179,60,.4)}
.ex-diff.hard{color:var(--threat);border-color:rgba(255,90,114,.4)}

/* ---------- teach / concept card ---------- */
.unit-tag{font-family:var(--mono);font-size:var(--text-mono);color:var(--violet);letter-spacing:.05em;margin-bottom:10px}
.teach{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;box-shadow:var(--shadow)}
.teach-label{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.teach-heading{
  font-family:var(--display);font-weight:700;font-size:clamp(19px,4.5vw,24px);
  line-height:1.25;letter-spacing:-.01em;margin:0 0 14px;
}
.teach-body{color:var(--read);font-size:var(--text-body);line-height:1.7}
.teach-body p{margin:0 0 12px}
.teach-body p:last-child{margin-bottom:0}
.teach-body b,.teach-body strong{color:var(--text)}
.teach-example{margin:16px 0 4px;background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:13px 14px}
.teach-example .ex-label{font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);margin-bottom:6px}
.teach-example .ex-body{font-size:var(--text-body);line-height:1.55;color:var(--text);white-space:pre-wrap}
.teach-key{
  margin-top:16px;background:var(--surface-2);border-left:3px solid var(--brand);
  border-radius:0 8px 8px 0;padding:11px 14px;font-style:italic;color:var(--text);
  font-size:var(--text-body);line-height:1.5;
}

/* ---------- unit complete ---------- */
.unit-complete{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px 20px;text-align:center}
.uc-badge{
  display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--safe);border:1px solid rgba(74,222,138,.4);border-radius:999px;padding:4px 11px;margin-bottom:14px;
}
.unit-complete h2{font-family:var(--display);font-weight:700;font-size:var(--text-display);margin:0 0 6px}
.uc-sub{color:var(--read);font-size:var(--text-body);margin:0 0 4px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--display);font-weight:600;font-size:15px;text-decoration:none;
  color:var(--on-accent);border:none;border-radius:11px;
  background:linear-gradient(180deg,var(--brand-hi),var(--brand) 48%,var(--brand-lo));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.34),0 10px 26px -16px rgba(61,219,163,.8);
  padding:13px 20px;margin-top:16px;cursor:pointer;min-height:48px;
  touch-action:manipulation;transition:filter .15s,transform .1s;
}
.btn:active{transform:scale(.98)}
.btn.ghost{background:transparent;color:var(--read);border:1px solid var(--line);box-shadow:none}
.btn.pro{
  background:linear-gradient(180deg,#c6b2ff,var(--violet) 55%,#8e6cf0);color:#120a26;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4),0 12px 30px -16px rgba(169,139,255,.9);
}
.btn.full{width:100%}
.btn.small{min-height:40px;padding:9px 14px;font-size:14px;margin-top:0}
@media (hover:hover){
  .btn:hover{filter:brightness(1.07)}
  .btn.ghost:hover{color:var(--text);border-color:var(--muted)}
}

/* ---------- intro / gate / complete panels ---------- */
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px 20px;box-shadow:var(--shadow)}
.panel h1{font-family:var(--display);font-weight:700;font-size:clamp(26px,7vw,36px);letter-spacing:-.02em;margin:0 0 14px}
.panel h1 .b{color:var(--brand)}
.panel h2{font-family:var(--display);font-weight:700;font-size:var(--text-display);margin:0 0 12px}
.panel p{color:var(--read);font-size:var(--text-body);line-height:1.7;margin:0 0 14px}
.panel p b,.panel p strong{color:var(--text)}
.panel p a{color:var(--brand)}
.panel .lede{color:var(--text);font-size:var(--text-prompt);line-height:1.6}
.tagline{font-family:var(--mono);font-size:12px;color:var(--violet);letter-spacing:.04em;margin-bottom:18px}

.howto{list-style:none;padding:0;margin:4px 0 20px;display:grid;gap:8px}
.howto li{
  display:flex;gap:12px;align-items:flex-start;padding:11px 12px;border-radius:11px;
  background:var(--surface-2);font-size:var(--text-body);color:var(--read);line-height:1.5;
}
.howto .ic{
  flex:0 0 auto;width:26px;height:26px;border-radius:8px;background:var(--surface-3);
  display:grid;place-items:center;font-family:var(--mono);font-size:12px;color:var(--brand);font-weight:700;
}
.howto b{color:var(--text)}

.gate-badge{
  display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--safe);border:1px solid rgba(74,222,138,.4);border-radius:999px;padding:4px 11px;margin-bottom:14px;
}
.gate-badge.pro{color:var(--violet);border-color:rgba(169,139,255,.45)}
.covers{display:flex;flex-wrap:wrap;gap:7px;margin:6px 0 22px}
.covers .t{font-family:var(--mono);font-size:11px;color:var(--violet);border:1px solid rgba(169,139,255,.35);border-radius:999px;padding:4px 10px}
.key-row{display:flex;flex-direction:column;gap:10px;margin-top:8px}
.key-row input{
  width:100%;background:var(--surface-2);border:1px solid var(--line);border-radius:11px;
  padding:13px 14px;color:var(--text);font-family:var(--mono);font-size:14px;min-height:48px;
}
.key-row input::placeholder{color:var(--muted)}
.key-msg{font-family:var(--mono);font-size:12px;margin-top:2px;min-height:16px}
.key-msg.err{color:var(--threat)}
.key-msg.ok{color:var(--safe)}
.btn-stack{display:flex;flex-direction:column;gap:10px;margin-top:18px}
.have-key{font-family:var(--mono);font-size:12px;color:var(--muted);text-align:center;margin-top:16px}
.have-key a{color:var(--violet)}

.end{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px 20px;text-align:center}
.end .rating{font-family:var(--display);font-weight:700;font-size:clamp(22px,6vw,28px);margin:2px 0 4px}
.end .rating.good{color:var(--safe)}
.end .rating.mid{color:var(--amber)}
.end .rating.bad{color:var(--threat)}
.end .line{font-family:var(--mono);font-size:13px;color:var(--muted);margin:14px 0}
.end .line b{color:var(--text)}
.end p{color:var(--read);font-size:var(--text-body);line-height:1.65;max-width:44ch;margin:12px auto}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:18px 0}
.stat-cell{background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:12px 8px}
.stat-cell .v{font-family:var(--mono);font-weight:700;font-size:22px}
.stat-cell .k{font-family:var(--mono);font-size:10px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);margin-top:4px}
.stat-cell.caught .v{color:var(--safe)}
.stat-cell.breach .v{color:var(--threat)}
.stat-cell.false .v{color:var(--amber)}

/* ---------- certificate ---------- */
.cert-wrap{width:100%}
.cert-wrap svg{width:100%;height:auto;display:block;border-radius:var(--radius);border:1px solid var(--line)}
.cert-actions{display:flex;flex-direction:column;gap:10px;margin-top:16px}
.next-step{margin-top:22px;padding:18px 16px;text-align:center;background:var(--surface);border-radius:var(--radius)}
.ns-label{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}
.next-step p{font-family:var(--display);font-weight:600;font-size:var(--text-prompt);margin:0}

/* =========================================================================
   HUB
   ========================================================================= */
.hub-hero{
  position:relative;overflow:hidden;
  background:linear-gradient(160deg,rgba(169,139,255,.10),rgba(61,219,163,.05) 45%,var(--surface) 75%);
  border:1px solid var(--line);border-radius:18px;padding:24px 20px;margin-bottom:18px;
  box-shadow:var(--shadow);
}
.hub-hero .eyebrow{
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--violet);
  display:flex;align-items:center;gap:8px;margin-bottom:12px;
}
.hub-hero h1{font-family:var(--display);font-weight:700;font-size:clamp(26px,5.4vw,40px);letter-spacing:-.03em;line-height:1.08;margin:0 0 10px}
.hub-hero h1 .b{color:var(--brand)}
.hub-hero p{color:var(--read);margin:0;max-width:62ch;line-height:1.65;font-size:var(--text-body)}
.hub-sum{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-top:20px}
@media (min-width:640px){ .hub-sum{grid-template-columns:repeat(4,1fr)} }
.hub-sum .s{background:rgba(5,6,13,.55);border:1px solid var(--line);border-radius:12px;padding:11px 13px}
.hub-sum .v{font-family:var(--mono);font-weight:700;font-size:22px;line-height:1.1}
.hub-sum .k{font-family:var(--mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-top:4px}
.hub-sum .s.xp .v{color:var(--amber)}
.hub-sum .s.acc .v{color:var(--safe)}
.hub-sum .s.str .v{color:var(--threat)}
.hub-sum .s.bdg .v{color:var(--violet)}

.hub-cards{display:grid;gap:14px;grid-template-columns:1fr}
@media (min-width:860px){ .hub-cards{grid-template-columns:repeat(3,1fr)} }
.hub-card{
  display:flex;flex-direction:column;gap:14px;position:relative;
  background:linear-gradient(180deg,var(--surface-2),var(--surface) 55%);
  border:1px solid var(--line);border-radius:16px;padding:20px 18px 18px;
  box-shadow:var(--shadow);
}
.hub-card.lab{border-color:rgba(169,139,255,.35)}
.hub-card .top{display:flex;align-items:center;gap:14px}
.hub-card .kicker{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.hub-card.lab .kicker{color:var(--violet)}
.hub-card h2{font-family:var(--display);font-weight:700;font-size:20px;letter-spacing:-.015em;margin:3px 0 0}
.hub-card p{margin:0;color:var(--read);font-size:14.5px;line-height:1.6}
.hub-card .next{
  margin-top:auto;background:rgba(5,6,13,.5);border-radius:11px;padding:11px 12px;
  font-size:13.5px;color:var(--read);line-height:1.45;
}
.hub-card .next .lbl{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:3px}
.hub-card .next b{color:var(--text);font-weight:600}
.hub-card .btn{margin-top:0}

.ring{flex:none;width:64px;height:64px;position:relative}
.ring svg{width:64px;height:64px;transform:rotate(-90deg)}
.ring .trk{fill:none;stroke:var(--surface-3);stroke-width:6}
.ring .val{fill:none;stroke:var(--brand);stroke-width:6;stroke-linecap:round;transition:stroke-dashoffset .6s ease}
.ring.violet .val{stroke:var(--violet)}
.ring.amber .val{stroke:var(--amber)}
.ring .pct{position:absolute;inset:0;display:grid;place-items:center;font-family:var(--mono);font-weight:700;font-size:14px}

.hub-sec{margin-top:30px}
.hub-sec h3{font-family:var(--display);font-weight:700;font-size:var(--text-display);letter-spacing:-.015em;margin:0 0 4px}
.hub-sec .sub{color:var(--read);font-size:14.5px;margin:0 0 14px}

.badges{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
@media (min-width:640px){ .badges{grid-template-columns:repeat(3,1fr)} }
@media (min-width:1024px){ .badges{grid-template-columns:repeat(5,1fr)} }
.badge{
  display:flex;gap:11px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:13px;padding:13px 12px;
}
.badge .medal{
  flex:none;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  font-family:var(--mono);font-weight:700;font-size:12px;
  background:var(--surface-3);color:var(--muted);
}
.badge.earned{border-color:rgba(232,179,60,.4);background:linear-gradient(180deg,rgba(232,179,60,.08),var(--surface))}
.badge.earned .medal{background:radial-gradient(circle at 35% 30%,#ffe39a,var(--amber) 60%,#9c6f12);color:#2a1a00}
.badge.earned.lab{border-color:rgba(169,139,255,.45);background:linear-gradient(180deg,rgba(169,139,255,.1),var(--surface))}
.badge.earned.lab .medal{background:radial-gradient(circle at 35% 30%,#e3d8ff,var(--violet) 60%,#5a3cc0);color:#120a26}
.badge .t{font-family:var(--display);font-weight:600;font-size:14px;line-height:1.3}
.badge .d{font-size:12.5px;color:var(--muted);line-height:1.45;margin-top:2px}
.badge:not(.earned) .t{color:var(--read)}

.lessons{display:grid;gap:10px;grid-template-columns:1fr}
@media (min-width:760px){ .lessons{grid-template-columns:repeat(2,1fr)} }
.lesson-unit{background:var(--surface);border:1px solid var(--line);border-radius:13px;padding:14px 14px 10px}
.lesson-unit .uh{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.lesson-unit .un{
  flex:none;width:26px;height:26px;border-radius:8px;background:var(--surface-3);display:grid;place-items:center;
  font-family:var(--mono);font-size:11px;font-weight:700;color:var(--brand);
}
.lesson-unit.done .un{color:var(--on-accent);background:var(--safe)}
.lesson-unit .ut{font-family:var(--display);font-weight:600;font-size:15px}
.lesson-unit .uo{font-family:var(--mono);font-size:10.5px;color:var(--violet);margin-left:auto;flex:none}
.lesson-unit ul{list-style:none;margin:0;padding:0}
.lesson-unit li a{
  display:flex;align-items:center;min-height:40px;padding:6px 8px;border-radius:8px;
  color:var(--read);text-decoration:none;font-size:14px;line-height:1.35;
}
.lesson-unit li a::before{content:"›";font-family:var(--mono);color:var(--muted);margin-right:8px}
@media (hover:hover){ .lesson-unit li a:hover{background:var(--surface-2);color:var(--text)} }

/* review screen */
.review-bar{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.review-bar .btn{margin-top:0;flex:1 1 180px}

/* =========================================================================
   PRACTICE RANGE
   ========================================================================= */
.range-head{margin-bottom:22px}
.range-label{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--violet);margin-bottom:10px}
.range-head h2{font-family:var(--display);font-weight:700;font-size:clamp(24px,5.5vw,34px);letter-spacing:-.025em;margin:0 0 12px}
.range-intro{color:var(--read);font-size:var(--text-body);line-height:1.7;margin:0 0 20px;max-width:70ch}

.range-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
@media (min-width:560px){ .range-stats{grid-template-columns:repeat(3,1fr)} }
@media (min-width:900px){ .range-stats{grid-template-columns:repeat(6,1fr)} }
.r-stat{
  background:linear-gradient(180deg,var(--surface-2),var(--surface));
  border:1px solid var(--line);border-radius:12px;padding:12px 13px;position:relative;overflow:hidden;
}
.r-stat::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--line)}
.r-stat.cyan::before{background:var(--brand)}
.r-stat.violet::before{background:var(--violet)}
.r-stat.safe::before{background:var(--safe)}
.r-stat.amber::before{background:var(--amber)}
.r-stat.threat::before{background:var(--threat)}
.r-stat .v{font-family:var(--mono);font-weight:700;font-size:22px;line-height:1.1}
.r-stat.cyan .v{color:var(--brand)}
.r-stat.violet .v{color:var(--violet)}
.r-stat.safe .v{color:var(--safe)}
.r-stat.amber .v{color:var(--amber)}
.r-stat.threat .v{color:var(--threat)}
.r-stat .k{font-family:var(--mono);font-size:9.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-top:4px}

.range-filter{
  position:sticky;top:104px;z-index:20;display:flex;flex-direction:column;gap:10px;
  padding:12px 0;margin-bottom:20px;background:linear-gradient(180deg,var(--bg) 82%,transparent);
}
@media (min-width:900px){ .range-filter{top:62px} }
.rf-search{position:relative}
.rf-icon{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:16px;pointer-events:none}
.range-filter input{
  width:100%;min-height:46px;padding:12px 14px 12px 36px;background:var(--surface);
  border:1px solid var(--line);border-radius:11px;color:var(--text);font-family:var(--body);font-size:16px;
}
.range-filter input::placeholder{color:var(--muted)}
.range-filter input::-webkit-search-cancel-button{filter:invert(.6)}
.rf-pills{display:flex;flex-wrap:wrap;gap:7px}
.r-pill{
  display:inline-flex;align-items:center;gap:7px;font-family:var(--mono);font-size:11px;letter-spacing:.04em;
  color:var(--read);background:var(--surface);border:1px solid var(--line);border-radius:999px;
  padding:7px 12px;min-height:34px;cursor:pointer;touch-action:manipulation;transition:color .15s,border-color .15s,background .15s;
}
.r-pill .n{font-size:9.5px;font-weight:700;color:var(--muted);background:var(--surface-2);border-radius:999px;padding:1px 6px}
.r-pill.on{color:var(--brand);border-color:rgba(61,219,163,.45);background:rgba(61,219,163,.08)}
.r-pill.on .n{color:var(--brand);background:rgba(61,219,163,.14)}
@media (hover:hover){ .r-pill:not(.on):hover{color:var(--text);border-color:var(--muted)} }

.r-empty{text-align:center;padding:36px 0 44px;color:var(--muted)}
.r-empty p{font-family:var(--display);font-size:var(--text-prompt);margin:0 0 4px;color:var(--text)}

.range-sec{margin-bottom:34px;scroll-margin-top:200px}
.rs-head{display:flex;align-items:center;gap:11px;margin-bottom:8px}
.rs-n{
  flex:0 0 auto;width:26px;height:26px;border-radius:8px;background:var(--surface-2);
  border:1px solid var(--line);display:grid;place-items:center;
  font-family:var(--mono);font-size:11px;font-weight:700;color:var(--brand);
}
.rs-head h3{font-family:var(--display);font-weight:700;font-size:var(--text-display);margin:0;letter-spacing:-.015em}
.rs-count{margin-left:auto;flex:0 0 auto;font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.04em}
.rs-count b{color:var(--text);font-weight:700}
.rs-intro{color:var(--read);font-size:var(--text-body);line-height:1.6;margin:0 0 16px;max-width:72ch}

.r-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr;gap:12px;align-items:stretch}
@media (min-width:660px){ .r-list{grid-template-columns:repeat(2,1fr)} }
@media (min-width:1140px){ .r-list{grid-template-columns:repeat(3,1fr)} }
.r-item{
  display:flex;flex-direction:column;
  background:linear-gradient(180deg,var(--surface-2),var(--surface) 42%);
  border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 16px 14px 18px;position:relative;overflow:hidden;
  transition:border-color .16s ease,transform .16s ease,box-shadow .16s ease;
}
.r-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:2px;
  background:linear-gradient(180deg,var(--brand),transparent 85%);opacity:.65;
}
.r-item.flagged::before{background:linear-gradient(180deg,var(--amber),transparent 85%);opacity:.8}
.r-item.done{border-color:rgba(74,222,138,.35)}
.r-item.done::before{background:linear-gradient(180deg,var(--safe),transparent 85%);opacity:1}
@media (hover:hover){
  .r-item:hover{border-color:rgba(61,219,163,.4);transform:translateY(-2px);box-shadow:0 18px 40px -26px rgba(0,0,0,.9)}
}
.r-title{
  font-family:var(--display);font-weight:600;font-size:16px;color:var(--text);text-decoration:none;
  display:flex;align-items:baseline;gap:6px;touch-action:manipulation;
}
.r-title::after{content:"↗";font-family:var(--mono);font-size:11px;color:var(--muted);flex:0 0 auto}
@media (hover:hover){ .r-title:hover{color:var(--brand)} }
.r-tags{display:flex;flex-wrap:wrap;gap:6px;margin:9px 0 10px}
.r-tag{font-family:var(--mono);font-size:9.5px;letter-spacing:.05em;text-transform:uppercase;padding:2px 8px;border-radius:999px;border:1px solid var(--line);color:var(--muted)}
.r-tag.level{color:var(--brand);border-color:rgba(61,219,163,.3)}
.r-tag.host{color:var(--violet);border-color:rgba(169,139,255,.3)}
.r-note{margin:0;color:var(--read);font-size:13.5px;line-height:1.6}
.r-foot{margin-top:auto;padding-top:12px;display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.r-flag{
  display:inline-block;font-family:var(--mono);font-size:9.5px;letter-spacing:.05em;text-transform:uppercase;
  padding:3px 9px;border-radius:999px;color:var(--amber);border:1px solid rgba(232,179,60,.4);background:rgba(232,179,60,.07);
}
.r-done{
  margin-left:auto;display:inline-flex;align-items:center;gap:7px;
  font-family:var(--mono);font-size:11px;letter-spacing:.04em;color:var(--read);
  background:transparent;border:1px solid var(--line);border-radius:999px;padding:0 12px;min-height:36px;cursor:pointer;
  touch-action:manipulation;
}
.r-done .box{width:14px;height:14px;border-radius:4px;border:1.5px solid var(--muted);display:grid;place-items:center;font-size:10px;line-height:1}
.r-done[aria-pressed="true"]{color:var(--safe);border-color:rgba(74,222,138,.45);background:rgba(74,222,138,.07)}
.r-done[aria-pressed="true"] .box{border-color:var(--safe);background:var(--safe);color:var(--on-accent)}
.r-locked-sec{
  background:var(--surface);border:1px dashed rgba(169,139,255,.35);border-radius:var(--radius);
  padding:16px;display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;
}
.r-locked-sec p{margin:0;color:var(--read);font-size:14px;flex:1 1 260px}
.r-locked-sec .btn{margin-top:0}

.range-credit{margin-top:26px;padding:14px 15px;background:var(--surface-2);border-radius:10px;border-left:3px solid var(--violet)}
.range-credit p{margin:0 0 6px;font-size:12.5px;line-height:1.6;color:var(--read)}
.range-credit p:last-child{margin-bottom:0}
.range-credit a{color:var(--violet)}

@media (max-width:639px){
  .r-title{min-height:44px;align-items:center;padding-right:2px}
  .r-pill{min-height:44px;padding:0 14px}
  .r-done{min-height:44px}
}

/* ---------- responsive: tablet+ ---------- */
@media (min-width:640px){
  .verdict-row{grid-template-columns:1fr 1fr}
  .vbtn{min-width:0}
  .cert-actions{flex-direction:row}
  .cert-actions .btn{margin-top:0}
  .btn-stack .btn{margin-top:0}
  .hub-hero{padding:30px 28px}
}
@media (min-width:1024px){ .vbtn{min-width:180px} }

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}

/* The screen container takes focus after a route change so keyboard and
   screen-reader users land at the top of the new view. It is not a control,
   so it needs no focus ring. */
#screen:focus{outline:none}

/* Practice Range on phones. The filter bar used to stay stuck under the
   header while you scrolled, and with nine filter pills stacked it grew to
   two thirds of the screen and let pills spill over the cards. On phones and
   small tablets it now scrolls away with the page, and the pills sit in one
   row you swipe sideways. The sticky bar stays on wide screens, where the
   header is one row and the pills fit. */
@media (max-width:899px){
  .range-filter{position:static;background:none;padding:0 0 6px;margin-bottom:14px;z-index:auto}
  .rf-pills{
    flex-wrap:nowrap;overflow-x:auto;gap:8px;padding:2px 2px 8px;margin:0 -2px;
    scrollbar-width:none;-webkit-overflow-scrolling:touch;
    -webkit-mask-image:linear-gradient(90deg,#000 92%,transparent);
            mask-image:linear-gradient(90deg,#000 92%,transparent);
  }
  .rf-pills::-webkit-scrollbar{display:none}
  .r-pill{flex:none;white-space:nowrap}
  .range-sec{scroll-margin-top:120px}
  .range-stats{margin-bottom:4px}
}