/* =============================================================================
   Uncrypt Playground — theme
   Matched to uncrypt.net: near-black #0a0a0a, GitHub-dark blue #79c0ff with a
   soft glow, Geist + Geist Mono, blue-tinted hairlines, 4px/pill radii.
   Personality: operator console. Mono carries structure (labels, levels, data);
   Geist carries voice (headlines, prose). Restraint everywhere except one
   signature moment per page.
   ============================================================================= */

/* ---------- fonts (self-hosted variable woff2, from uncrypt.net) ---------- */
@font-face {
  font-family: "Geist";
  src: url("../fonts/geist-var.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Geist Mono";
  src: url("../fonts/geist-mono-var.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* ---------- tokens ---------- */
:root {
  --bg:            #0a0a0a;
  --surface:       #111214;
  --surface-2:     #15171b;
  --surface-3:     #1a1c21;

  --line:        rgba(214, 235, 253, 0.14);
  --line-strong: rgba(214, 235, 253, 0.26);

  --ink:      #f0f0f0;
  --ink-mut:  #b9b9be;
  --ink-fnt:  #8f8f94;

  --accent:       #f0b429;      /* golden — the primary voice */
  --accent-br:    #ffd166;
  --accent-deep:  #3d2e07;
  --accent-dim:   rgba(240, 180, 41, 0.10);
  --accent-line:  rgba(240, 180, 41, 0.35);
  --accent-glow:  rgba(240, 180, 41, 0.40);

  /* track identities — the four-colour mix */
  --tr-red:    #ff5468;
  --tr-gold:   #f0b429;
  --tr-green:  #2dd47f;
  --tr-blue:   #58a6ff;

  --ok:     #34d399;
  --ok-dim: rgba(52, 211, 153, 0.12);
  --danger: #ff7b72;
  --dg-dim: rgba(255, 123, 114, 0.12);
  --warn:   #d29922;
  --wn-dim: rgba(210, 153, 34, 0.14);

  --font-sans: "Geist", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SFMono-Regular", "Cascadia Code", Menlo, Consolas, monospace;

  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 12px;
  --pill: 999px;

  --wrap: 1160px;
  --head-h: 60px;
  --dock-h: 44px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }
/* the hidden attribute must always win over component display rules */
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background-image:
    radial-gradient(900px 420px at 12% -10%, rgba(255, 255, 255, 0.030), transparent 60%),
    radial-gradient(760px 520px at 88% -6%, rgba(255, 255, 255, 0.022), transparent 60%);
  background-attachment: fixed;
  min-height: 100vh;
  animation: bgdrift 28s ease-in-out infinite alternate;
  /* room for the fixed progress dock */
  padding-bottom: calc(var(--dock-h) + 8px);
}
@keyframes bgdrift {
  from { background-position: 0 0, 100% -4%, 0 0; }
  to   { background-position: 70px 26px, calc(100% - 90px) 22px, 0 0; }
}

h1, h2, h3, h4 { font-weight: 600; line-height: 1.22; letter-spacing: -0.022em; margin: 0 0 0.5em; }
h1 { font-size: clamp(1.9rem, 4.2vw, 3rem); }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.05rem; }
p  { margin: 0 0 1em; }
a  { color: var(--ink); text-decoration: none; transition: color 0.15s var(--ease); }
a:hover { color: var(--accent-br); }
code, pre { font-family: var(--font-mono); font-size: 0.88em; }
code {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 0.08em 0.38em;
  word-break: break-all;
}
pre {
  background: #0d0e11;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 14px 16px;
  overflow-x: auto;
  line-height: 1.55;
}
pre code { background: none; border: 0; padding: 0; }
::selection { background: var(--accent-deep); color: var(--accent-br); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: var(--r-sm); }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.muted { color: var(--ink-fnt); }
.dim   { color: var(--ink-mut); }

/* utilities kept from the previous shell */
.u-accent { color: var(--accent); }
.u-accent-hi { color: var(--accent-br); }
.u-medium { font-weight: 500; }
.u-measure { max-width: 62ch; }
.u-mono-sm { font-family: var(--font-mono); font-size: 0.82rem; }
.u-fs-sm { font-size: 0.88rem; }
.u-fs-xs { font-size: 0.78rem; }
.u-mb-14 { margin-bottom: 14px; }
.u-mt-20 { margin-top: 20px; }
.u-mt-22 { margin-top: 22px; }
.u-mt-26 { margin-top: 26px; }
.u-pb-20 { padding-bottom: 20px; }
.u-flex1 { flex: 1; }
.u-no-border { border: 0 !important; }

.skip {
  position: absolute; left: -999px; top: 0;
  background: var(--accent); color: #06121c;
  padding: 8px 14px; border-radius: var(--r-sm); z-index: 200; font-weight: 600;
}
.skip:focus { left: 12px; top: 12px; }

/* mono micro-label — the structural voice */
.mono-label, .mon-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-fnt);
}

/* --------------------------------------------------------------------------
   Header / nav
   -------------------------------------------------------------------------- */
.site-head {
  position: sticky; top: 0; z-index: 60;
  background: rgba(10, 10, 10, 0.78);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.head-inner { display: flex; align-items: center; justify-content: space-between; height: var(--head-h); gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-logo {
  height: 22px; width: auto; display: block;
  filter: drop-shadow(0 0 8px var(--accent-glow));
}
.brand-text { font-family: var(--font-mono); font-size: 0.92rem; letter-spacing: 0.02em; color: var(--ink); white-space: nowrap; }
.brand-sep { color: var(--ink-fnt); margin: 0 2px; }
.brand-sub { color: var(--ink-mut); }
.brand:hover .brand-text { color: var(--accent-br); }

.site-nav { display: flex; align-items: center; gap: 2px; flex-wrap: wrap; }
.site-nav a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  padding: 7px 12px;
  border-radius: var(--pill);
  color: var(--ink-mut);
  border: 1px solid transparent;
}
.site-nav a:hover { color: var(--ink); background: var(--surface-2); }
.site-nav a.active {
  color: var(--accent-br);
  background: var(--accent-dim);
  border-color: var(--accent-line);
}
.site-nav a.burp { color: var(--warn); }
.site-nav a.burp::before { content: "⌘ "; }
.site-nav a.burp:hover { color: #e7bc55; background: var(--wn-dim); }
.site-nav a.auth-chip {
  border: 1px solid var(--accent-line);
  color: var(--accent-br);
  background: var(--accent-dim);
}
.site-nav a.auth-chip:hover { background: var(--surface-2); }

/* --------------------------------------------------------------------------
   Buttons & pills
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  padding: 10px 20px;
  border-radius: var(--pill);
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: all 0.18s var(--ease);
  white-space: nowrap;
}
.btn:hover { border-color: var(--accent-line); color: var(--accent-br); background: var(--accent-dim); }
.btn-primary {
  background: #ffffff;
  border-color: #ffffff;
  color: #0a0a0a;
  font-weight: 600;
  box-shadow: 0 2px 14px rgba(255, 255, 255, 0.12);
}
.btn-primary:hover {
  background: var(--accent-br);
  border-color: var(--accent-br);
  color: #141005;
  box-shadow: 0 4px 20px rgba(240, 180, 41, 0.28);
}
.btn-sm { padding: 6px 14px; font-size: 0.74rem; }

/* OAuth provider buttons */
.btn-provider { background: #2d333b; border-color: #444c56; color: #ffffff; }
.btn-github { animation: ghGlow 2.8s ease-in-out infinite; }
@keyframes ghGlow {
  0%, 100% { box-shadow: 0 0 4px rgba(240, 180, 41, 0.18); border-color: #444c56; }
  50%      { box-shadow: 0 0 16px rgba(240, 180, 41, 0.55); border-color: var(--accent); }
}
.btn-provider:hover { background: #e9e9e9; border-color: #e9e9e9; color: #111; box-shadow: none; }
.pv-logo { flex: none; }

/* player dashboard */
.dash-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.cert-list { list-style: none; margin: 0; padding: 0; }
.cert-row {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.cert-row:last-child { border-bottom: 0; }
.cert-title { font-weight: 600; color: var(--ink); margin-right: auto; }
.cert-row .frac { white-space: nowrap; }
.btn-ghost { background: transparent; }

.pill {
  display: inline-flex; align-items: center;
  font-family: var(--font-mono);
  font-size: 0.62rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 3px 9px;
  border-radius: var(--pill);
  border: 1px solid var(--line-strong);
  color: var(--ink-mut);
  white-space: nowrap;
}
.pill.diff-easy   { color: var(--ok); border-color: rgba(52, 211, 153, 0.35); background: var(--ok-dim); }
.pill.diff-medium { color: var(--warn); border-color: rgba(210, 153, 34, 0.4); background: var(--wn-dim); }
.pill.diff-hard   { color: var(--danger); border-color: rgba(255, 123, 114, 0.35); background: var(--dg-dim); }

/* --------------------------------------------------------------------------
   Hero (home — minimal, one screen)
   -------------------------------------------------------------------------- */
.hero {
  min-height: calc(100vh - var(--head-h) - var(--dock-h));
  display: flex; flex-direction: column; justify-content: center;
  padding: 48px 0 40px;
}
.hero-kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem; font-weight: 500;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 22px;
}
.hero-kicker::before { content: "> "; color: var(--ink-fnt); }
.hero h1 { max-width: 21ch; margin-bottom: 20px; }
.hero h1 .accent {
  color: var(--ink);
  border-bottom: 3px solid var(--tr-gold);
  padding-bottom: 2px;
}
.hero-lede { max-width: 58ch; color: var(--ink-mut); font-size: 1.02rem; margin-bottom: 30px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 34px; }
.hero-stats {
  display: flex; gap: 26px; flex-wrap: wrap;
  padding-top: 22px; border-top: 1px solid var(--line);
  max-width: 560px;
}
.hero-stat { display: flex; align-items: baseline; gap: 8px; }
.hero-stat .n { font-family: var(--font-mono); font-size: 1.15rem; font-weight: 600; color: var(--ink); }
.hero-stat .l { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-fnt); }

/* signature: the typed recon line */
.hero-term {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--ink-mut);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(13, 14, 17, 0.8);
  padding: 12px 16px;
  max-width: 560px;
  min-height: 46px;
  margin-bottom: 34px;
  white-space: pre-wrap;
  word-break: break-word;
}
.hero-term .t-prompt { color: var(--ok); }
.hero-term .t-cmd { color: var(--ink); }
.hero-term .t-out { color: var(--accent); }
.hero-term .t-caret {
  display: inline-block; width: 7px; height: 1em;
  background: var(--accent); vertical-align: text-bottom;
  animation: caret 1.05s steps(1) infinite;
}
@keyframes caret { 50% { opacity: 0; } }

/* load-in states (Motion adds .in; no-JS/reduced-motion shows final) */
.reveal { opacity: 0; transform: translateY(14px); filter: blur(6px); }
.reveal.in, .no-motion .reveal { opacity: 1; transform: none; filter: none; transition: opacity 0.7s var(--ease), transform 0.7s var(--ease), filter 0.7s var(--ease); }
.no-js .reveal { opacity: 1; transform: none; filter: none; }

/* --------------------------------------------------------------------------
   Panels / generic cards
   -------------------------------------------------------------------------- */
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 28px;
}
.app-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 18px 20px;
  margin: 14px 0;
}
.result-box {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: #0d0e11;
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  border-radius: var(--r-sm);
  padding: 12px 14px;
  white-space: pre-wrap;
  word-break: break-word;
  margin: 10px 0 0;
}
.flagline {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent-br);
  background: var(--accent-dim);
  border: 1px solid var(--accent-line);
  border-radius: var(--r-sm);
  padding: 2px 10px;
  text-shadow: 0 0 12px var(--accent-glow);
}

/* forms */
.flag-row, .flag-form { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin: 10px 0; }
.flag-row input, .flag-form input {
  flex: 1 1 240px;
  background: #0d0e11;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  padding: 10px 12px;
}
.flag-row input:focus, .flag-form input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }
.field { margin: 12px 0; }
.field-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink-fnt);
  margin-bottom: 6px;
}
.field input[type="text"], .field input[type="email"], .field input[type="password"],
.field select, .field textarea, .poc-input {
  width: 100%;
  background: #0d0e11;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  padding: 10px 12px;
}
.field input:focus, .field select:focus, .field textarea:focus, .poc-input:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim);
}
.flag-status { font-family: var(--font-mono); font-size: 0.8rem; min-height: 1.2em; margin: 8px 0 0; }
.flag-status.ok, .st-ok { color: var(--ok); }
.flag-status.err, .st-err, .st-bad { color: var(--danger); }
.flag-status.warn, .st-warn { color: var(--warn); }
.check-row { display: flex; align-items: center; gap: 8px; color: var(--ok); font-family: var(--font-mono); font-size: 0.85rem; }
.preview {
  background: #0d0e11;
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-md);
  padding: 14px;
  margin: 10px 0;
}

/* progress (reused by category heads and the dock) */
.progress-track {
  height: 4px;
  background: var(--surface-3);
  border-radius: var(--pill);
  overflow: hidden;
  flex: 1;
  min-width: 80px;
}
.progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent-deep), var(--accent));
  border-radius: var(--pill);
  box-shadow: 0 0 10px rgba(121, 192, 255, 0.25);
  transition: width 0.6s var(--ease);
}

/* --------------------------------------------------------------------------
   Lab pages (lab_chrome shell)
   -------------------------------------------------------------------------- */
.lab-topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 10, 10, 0.82);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.lab-topbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 14px; min-height: 54px; padding-top: 8px; padding-bottom: 8px; flex-wrap: wrap; }
.lab-topbar-right { display: flex; align-items: center; gap: 10px; }
.lab-back { font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-mut); }
.lab-back:hover { color: var(--accent-br); }
.lab-title { font-size: 1.25rem; margin: 0 0 4px; }
.lab-level { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); }
.lab-id-meta { font-family: var(--font-mono); font-size: 0.74rem; color: var(--ink-fnt); }
.lab-main { padding-top: 26px; padding-bottom: 48px; }
.lab-body { max-width: 74ch; margin: 0 auto; }
.lab-stage { margin: 18px 0; }
.lab-objective { color: var(--ink-mut); max-width: 68ch; }
.lab-nudge {
  border: 1px solid var(--accent-line);
  background: var(--accent-dim);
  border-radius: var(--r-md);
  padding: 12px 16px;
  color: var(--accent-br);
  font-size: 0.9rem;
  margin: 14px 0;
}
.lab-nudge:empty { display: none; }
.lab-samples { margin: 12px 0; }
.lab-controls { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin: 16px 0; }
.lab-hint {
  border: 1px solid var(--line);
  border-left: 2px solid var(--warn);
  background: var(--surface);
  border-radius: var(--r-md);
  padding: 14px 18px;
  margin: 22px 0;
}
.lab-hint-head { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.lab-hint-tag {
  font-family: var(--font-mono);
  font-size: 0.62rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--warn);
  background: var(--wn-dim);
  border: 1px solid rgba(210, 153, 34, 0.4);
  border-radius: var(--pill);
  padding: 2px 9px;
}
.lab-hint-sub { color: var(--ink-mut); font-size: 0.9rem; margin: 0; }
.lab-burp { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 12px 0; }
.lab-burp-tag {
  font-family: var(--font-mono);
  font-size: 0.62rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent-br);
  background: var(--accent-dim);
  border: 1px solid var(--accent-line);
  border-radius: var(--pill);
  padding: 2px 9px;
}
.lab-burp-link { font-family: var(--font-mono); font-size: 0.8rem; }
.lab-sandbox-note { font-size: 0.8rem; }
.lab-cta { border-top: 1px solid var(--line); margin-top: 30px; padding-top: 22px; }
.lab-cta-inner { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.lab-next { text-decoration: none; }

/* --------------------------------------------------------------------------
   Home lab cards + category sections (used on labs explorer pane / legacy)
   -------------------------------------------------------------------------- */
.cat-section { margin: 44px 0; }
.cat-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; margin-bottom: 16px; }
.cat-head-left { max-width: 62ch; }
.cat-title { display: flex; align-items: baseline; gap: 12px; }
.cat-desc { color: var(--ink-mut); font-size: 0.92rem; margin: 6px 0 0; }
.cat-progress { display: flex; align-items: center; gap: 12px; min-width: 220px; }
.frac { font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-mut); white-space: nowrap; }
.frac .done { color: var(--accent-br); font-weight: 600; }
.cat-claim { display: none; }
.cat-badge-earned { display: none; color: var(--ok); font-family: var(--font-mono); font-size: 0.8rem; margin: 0; }

.lab-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.lab-card {
  position: relative;
  display: flex; flex-direction: column; gap: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 18px;
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease);
}
.lab-card:hover { border-color: var(--accent-line); transform: translateY(-2px); }
.lab-card.is-solved { border-color: rgba(52, 211, 153, 0.3); }
.lab-card-top { display: flex; justify-content: space-between; align-items: center; }
.lab-card-lvl { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.14em; color: var(--ink-fnt); }
.lab-card-lvl::before { content: "[ "; color: var(--accent-line); }
.lab-card-lvl::after { content: " ]"; color: var(--accent-line); }
.lab-card h3 { margin: 0; font-size: 1rem; }
.lab-card p { margin: 0; color: var(--ink-mut); font-size: 0.86rem; flex: 1; }
.lab-card-foot { display: flex; justify-content: space-between; align-items: center; }
.lab-card-status { display: inline-flex; align-items: center; gap: 6px; font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-fnt); }
.lab-card.is-solved .lab-card-status { color: var(--ok); }
.lab-card-go { font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-fnt); transition: color 0.15s var(--ease); }
.lab-card:hover .lab-card-go { color: var(--accent-br); }
.lab-card-link { position: absolute; inset: 0; border-radius: var(--r-md); }
.lab-card .check { width: 14px; height: 14px; }

/* --------------------------------------------------------------------------
   Labs explorer (sidebar rail + pane)
   -------------------------------------------------------------------------- */
.explorer {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 26px;
  align-items: start;
  padding: 34px 0 60px;
}
.ex-rail {
  position: sticky; top: calc(var(--head-h) + 18px);
  max-height: calc(100vh - var(--head-h) - var(--dock-h) - 36px);
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  padding: 10px;
  scrollbar-width: thin;
}
.ex-rail-head {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 8px 10px 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}
.ex-rail-total { font-family: var(--font-mono); font-size: 0.74rem; color: var(--accent-br); }

.ex-cat { border-radius: var(--r-md); }
.ex-cat + .ex-cat { margin-top: 2px; }
.ex-cat-btn {
  display: grid;
  grid-template-columns: 26px 1fr auto auto;
  align-items: center; gap: 8px;
  width: 100%;
  text-align: left;
  background: none; border: 0;
  color: var(--ink-mut);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 10px;
  border-radius: var(--r-md);
  cursor: pointer;
  transition: background 0.15s var(--ease), color 0.15s var(--ease);
}
.ex-cat-btn:hover { background: var(--surface-2); color: var(--ink); }
.ex-cat-btn .ex-idx { color: var(--ink-fnt); font-size: 0.68rem; }
.ex-cat-btn .ex-name { color: var(--ink); font-family: var(--font-sans); font-weight: 500; font-size: 0.88rem; }
.ex-cat-btn .ex-frac { font-size: 0.68rem; color: var(--ink-fnt); }
.ex-cat-btn .ex-frac .done { color: var(--ok); }
.ex-cat.active .ex-cat-btn { background: var(--accent-dim); color: var(--accent-br); }
.ex-cat.active .ex-cat-btn .ex-name { color: var(--accent-br); }
.ex-cat-btn .ex-chev { justify-self: end; transition: transform 0.25s var(--ease); color: var(--ink-fnt); font-size: 0.6rem; }
.ex-cat.open .ex-chev { transform: rotate(90deg); }

.ex-labs { list-style: none; margin: 0; padding: 0 0 6px; overflow: hidden; }
.ex-labs[hidden] { display: none; }
.ex-sub, .pane-sub {
  list-style: none;
  padding: 10px 10px 4px 36px;
}
.pane-sub { padding: 18px 10px 2px; border-bottom: 1px solid var(--line); }
.ex-sub .mono-label, .pane-sub .mono-label {
  color: var(--accent);
  letter-spacing: 0.18em;
}
.ex-row {
  display: grid;
  grid-template-columns: 44px 1fr auto auto;
  align-items: center; gap: 8px;
  padding: 7px 10px 7px 36px;
  border-radius: var(--r-sm);
  color: var(--ink-mut);
  font-size: 0.82rem;
  transition: background 0.12s var(--ease), color 0.12s var(--ease);
}
.ex-row:hover { background: var(--surface-2); color: var(--ink); }
.ex-row .ex-lvl { font-family: var(--font-mono); font-size: 0.64rem; letter-spacing: 0.1em; color: var(--ink-fnt); }
.ex-row .ex-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ex-row .pill { font-size: 0.56rem; padding: 2px 7px; }
.ex-row .ex-done { font-family: var(--font-mono); font-size: 0.72rem; color: var(--ok); visibility: hidden; }
.ex-row.is-solved .ex-done { visibility: visible; }
.ex-row.is-solved .ex-title { color: var(--ink-mut); }

.ex-pane {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  padding: 26px 28px;
  min-height: 420px;
}
.ex-pane-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 18px; flex-wrap: wrap; margin-bottom: 6px; }
.ex-pane-kicker { margin: 0 0 8px; }
.ex-pane h2 { margin: 0 0 8px; }
.ex-pane-desc { color: var(--ink-mut); max-width: 58ch; }
.ex-pane-note { display: flex; align-items: center; gap: 10px; margin: 12px 0 4px; flex-wrap: wrap; }
.ex-pane-progress { display: flex; align-items: center; gap: 12px; margin: 16px 0 22px; }
.ex-pane-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.ex-pane-row {
  display: grid;
  grid-template-columns: 64px 1fr auto auto;
  align-items: center; gap: 14px;
  padding: 13px 10px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-mut);
  transition: background 0.13s var(--ease), color 0.13s var(--ease);
}
.ex-pane-row:hover { background: var(--surface-2); color: var(--ink); }
.ex-pane-row .ex-lvl { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.12em; color: var(--ink-fnt); }
.ex-pane-row .ex-title { color: var(--ink); font-weight: 500; font-size: 0.94rem; }
.ex-pane-row .ex-blurb { display: block; color: var(--ink-fnt); font-weight: 400; font-size: 0.8rem; margin-top: 2px; }
.ex-pane-row .ex-done { font-family: var(--font-mono); font-size: 0.76rem; color: var(--ok); visibility: hidden; }
.ex-pane-row.is-solved .ex-done { visibility: visible; }
.ex-pane-empty { color: var(--ink-fnt); font-family: var(--font-mono); font-size: 0.8rem; padding: 20px 0; }

/* --------------------------------------------------------------------------
   About page
   -------------------------------------------------------------------------- */
.about { padding: 40px 0 60px; }
.about-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 22px; }
.about-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 20px;
}
.about-card .mono-label { display: block; margin-bottom: 10px; color: var(--accent); }
.about-card h3 { margin: 0 0 8px; }
.about-card p { margin: 0; color: var(--ink-mut); font-size: 0.9rem; }

/* --------------------------------------------------------------------------
   Walkthroughs
   -------------------------------------------------------------------------- */
.wt-hero { padding: 40px 0 10px; }
.wt-warn {
  display: flex; gap: 10px; align-items: flex-start;
  border: 1px solid rgba(210, 153, 34, 0.4);
  background: var(--wn-dim);
  border-radius: var(--r-md);
  color: var(--ink-mut);
  padding: 12px 16px;
  font-size: 0.88rem;
  max-width: 72ch;
}
.wt-lock { padding: 26px 0 60px; }
.wt-lock-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 34px;
  max-width: 620px;
  text-align: center;
  margin: 0 auto;
}
.wt-lock-mark { font-size: 1.6rem; margin-bottom: 8px; }
.wt-lock-progress { font-family: var(--font-mono); font-size: 0.84rem; color: var(--ink-mut); }
.wt-lock-progress b { color: var(--accent-br); }
.wt-lock-actions { display: flex; justify-content: center; gap: 12px; margin: 18px 0 8px; }
.wt-unlock { margin-top: 26px; }
.wt-unlock-or { display: flex; align-items: center; gap: 12px; color: var(--ink-fnt); font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; }
.wt-unlock-or::before, .wt-unlock-or::after { content: ""; height: 1px; background: var(--line); flex: 1; }
.wt-unlock-form { max-width: 420px; margin: 14px auto 0; }
.wt-cat-nav {
  display: flex; gap: 8px; flex-wrap: wrap;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  margin-bottom: 10px;
}
.wt-cat-nav a {
  font-family: var(--font-mono);
  font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-mut);
  border: 1px solid var(--line-strong);
  border-radius: var(--pill);
  padding: 5px 12px;
}
.wt-cat-nav a:hover { color: var(--accent-br); border-color: var(--accent-line); background: var(--accent-dim); }
.wt-group { padding: 26px 0 6px; }
.wt-group h2 { display: flex; align-items: baseline; gap: 12px; }
.wt-sub { margin: 18px 0 8px; color: var(--accent); }
.wt-item {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
  margin: 10px 0;
}
.wt-item summary {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  align-items: center; gap: 12px;
  padding: 13px 16px;
  cursor: pointer;
  list-style: none;
  border-radius: var(--r-md);
}
.wt-item summary::-webkit-details-marker { display: none; }
.wt-item summary:hover { background: var(--surface-2); }
.wt-lvl { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.12em; color: var(--ink-fnt); }
.wt-name { color: var(--ink); font-weight: 500; }
.wt-body { border-top: 1px solid var(--line); padding: 18px 20px; }
.wt-body h3 { color: var(--accent-br); }
.wt-open-lab { margin-top: 16px; }
.wt-flag {
  font-family: var(--font-mono);
  background: var(--surface-2);
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-sm);
  padding: 2px 10px;
  color: var(--ink-fnt);
}
.wt-flag[data-filled="1"] {
  color: var(--accent-br);
  border: 1px solid var(--accent-line);
  background: var(--accent-dim);
  text-shadow: 0 0 12px var(--accent-glow);
}

/* --------------------------------------------------------------------------
   Badge modal
   -------------------------------------------------------------------------- */
.modal { position: fixed; inset: 0; z-index: 120; display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal[hidden] { display: none; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(5, 6, 8, 0.78); backdrop-filter: blur(6px); }
.modal-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  padding: 28px;
  width: min(680px, 100%);
  max-height: 92vh;
  overflow-y: auto;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6), 0 0 40px var(--accent-dim);
}
.modal-kicker { margin: 0 0 8px; color: var(--accent); }
.modal-title { font-size: 1.5rem; margin: 0 0 6px; }
.modal-desc { color: var(--ink-mut); }
.modal-hint { font-size: 0.82rem; }
.badge-preview-wrap { margin: 18px 0; text-align: center; }
.badge-preview-wrap canvas { max-width: 100%; height: auto; border-radius: var(--r-md); }
.modal-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.modal-close { position: absolute; top: 14px; right: 14px; background: none; border: 0; color: var(--ink-fnt); font-size: 1.2rem; cursor: pointer; padding: 6px 10px; border-radius: var(--r-sm); }
.modal-close:hover { color: var(--ink); background: var(--surface-2); }

/* toast */
.toast {
  position: fixed; left: 50%; bottom: calc(var(--dock-h) + 22px);
  transform: translate(-50%, 16px);
  background: var(--surface-3);
  border: 1px solid var(--line-strong);
  border-radius: var(--pill);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 10px 18px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  z-index: 150;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* --------------------------------------------------------------------------
   Progress dock (fixed bottom)
   -------------------------------------------------------------------------- */
.progress-dock {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 90;
  height: var(--dock-h);
  background: rgba(10, 10, 10, 0.88);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-top: 1px solid var(--line);
  display: flex;
}
.progress-dock-inner {
  max-width: var(--wrap); width: 100%; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; gap: 14px;
}
.pd-label { font-family: var(--font-mono); font-size: 0.64rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-fnt); white-space: nowrap; }
.pd-count { font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink); white-space: nowrap; }
.pd-count b { color: var(--accent-br); font-weight: 600; }
.pd-note {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--ink-fnt);
  white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
  margin-left: auto;
}
.pd-info {
  position: relative;
  background: none; border: 1px solid var(--line-strong); border-radius: var(--pill);
  color: var(--ink-fnt);
  font-family: var(--font-mono); font-size: 0.66rem;
  width: 22px; height: 22px;
  cursor: pointer; flex: 0 0 auto;
}
.pd-info:hover { color: var(--accent-br); border-color: var(--accent-line); }
.pd-tip {
  position: absolute; right: 0; bottom: calc(100% + 12px);
  width: min(320px, 78vw);
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  color: var(--ink-mut);
  font-size: 0.78rem;
  line-height: 1.5;
  padding: 12px 14px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.55);
  display: none;
}
.pd-tip.open { display: block; }
.pd-tip .mono-label { display: block; margin-bottom: 6px; color: var(--accent); }
.pd-tip b { color: var(--ink); }
.no-js .progress-dock, .no-motion .progress-dock { display: none; }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-foot { border-top: 1px solid var(--line); margin-top: 40px; }
.foot-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; padding: 26px 24px; flex-wrap: wrap; }
.foot-brand .brand { margin-bottom: 8px; }
.foot-note { color: var(--ink-fnt); font-size: 0.8rem; max-width: 46ch; margin: 0; }
.foot-meta { color: var(--ink-fnt); font-size: 0.78rem; margin: 0; }

/* --------------------------------------------------------------------------
   Selftest / misc tables
   -------------------------------------------------------------------------- */
table { border-collapse: collapse; width: 100%; font-size: 0.86rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-fnt); font-weight: 500; }

hr { border: 0; border-top: 1px solid var(--line); margin: 26px 0; }
blockquote { border-left: 2px solid var(--accent-line); margin: 14px 0; padding: 4px 16px; color: var(--ink-mut); }

/* --------------------------------------------------------------------------
   Hero scan (pointer-reactive recon reveal)
   -------------------------------------------------------------------------- */
.hero-scan {
  position: relative;
  width: 100vw;
  margin-left: calc(50% - 50vw);
  min-height: calc(100vh - var(--head-h) - var(--dock-h));
  display: flex;
  align-items: center;
  overflow: hidden;
}
.scan-grid {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(214, 235, 253, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(214, 235, 253, 0.055) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(460px circle at var(--mx, 50%) var(--my, 42%), rgba(0, 0, 0, 0.95), transparent 78%);
  mask-image: radial-gradient(460px circle at var(--mx, 50%) var(--my, 42%), rgba(0, 0, 0, 0.95), transparent 78%);
}
.scan-glow {
  position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(340px circle at var(--mx, 50%) var(--my, 42%), rgba(255, 255, 255, 0.05), rgba(240, 180, 41, 0.05) 55%, transparent 70%);
}
.scan-intel {
  position: absolute; inset: 0; z-index: 1;
  -webkit-mask-image: radial-gradient(280px circle at var(--mx, 50%) var(--my, 42%), #000 26%, transparent 76%);
  mask-image: radial-gradient(280px circle at var(--mx, 50%) var(--my, 42%), #000 26%, transparent 76%);
}
.scan-intel span {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-br);
  text-shadow: 0 0 14px var(--accent-glow);
  white-space: nowrap;
}
.scan-intel span { color: #6f7580; text-shadow: none; }
.hero-core { position: relative; z-index: 2; transform: translate3d(calc(var(--px, 0) * 10px), calc(var(--py, 0) * 8px), 0); transition: transform 0.25s linear; }
.scan-hint { margin: 28px 0 0; }

/* --------------------------------------------------------------------------
   Labs dashboard (full-screen rail + panel)
   -------------------------------------------------------------------------- */
body.dash { padding-bottom: 0; }
body.dash .site-foot { display: none; }
body.dash main.wrap { max-width: none; padding: 0; }
.dash-shell {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  height: calc(100vh - var(--head-h));
}
body.dash .ex-rail {
  position: static;
  height: 100%;
  max-height: none;
  border: 0;
  border-right: 1px solid var(--line);
  border-radius: 0;
}
.dash-main {
  position: relative;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.dash-scroll { flex: 1; overflow-y: auto; padding: 30px 40px 96px; }
body.dash .ex-pane { max-width: 980px; padding: 26px 32px; }
.ex-pane-head { align-items: baseline; }

/* dock pinned inside the right panel */
body.dash .progress-dock { position: absolute; left: 0; right: 0; bottom: 0; }
body.dash .progress-dock-inner { padding: 0 40px; }

/* in-panel lab viewer */
.lab-frame-stage {
  position: absolute; inset: 0; z-index: 6;
  display: flex; flex-direction: column;
  background: var(--bg);
}
.lab-frame-bar {
  display: flex; align-items: center; gap: 16px;
  padding: 9px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 10, 10, 0.88);
}
.lab-frame-crumb {
  flex: 1; min-width: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-mut);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.lab-frame-open {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-fnt);
  white-space: nowrap;
}
.lab-frame-open:hover { color: var(--accent-br); }
.lab-frame { flex: 1; width: 100%; border: 0; background: #0d0e11; }

/* --------------------------------------------------------------------------
   Track chooser (home) + track page + verify
   -------------------------------------------------------------------------- */
.tracks { padding: 26px 0 30px; }
.track-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 18px; }
.track-card {
  display: flex; flex-direction: column; gap: 6px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 16px;
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
/* home cards stay neutral & professional; track colours live inside tracks */
.track-card:hover {
  border-color: var(--accent-line);
  transform: translateY(-2px);
}
.track-card:hover h3 { color: var(--accent-br); }
.track-card.is-start { background: linear-gradient(180deg, rgba(240, 180, 41, 0.08), transparent 60%), var(--surface); }
.ex-pane[data-cat="burp"] { --tk: var(--tr-gold); }
.ex-pane[data-cat="owasp"] { --tk: var(--tr-red); }
.ex-pane[data-cat="modern"] { --tk: var(--tr-green); }
.ex-pane[data-cat="ai-owasp"], .ex-pane[data-cat="ai-more"] { --tk: var(--tr-blue); }
.ex-pane h2, .track-head h1 { color: var(--tk, var(--ink)); }
body[data-page-track="burp"] .track-head h1 { color: var(--tr-gold); }
body[data-page-track="owasp"] .track-head h1 { color: var(--tr-red); }
body[data-page-track="modern"] .track-head h1 { color: var(--tr-green); }
body[data-page-track="ai-owasp"], body[data-page-track="ai-more"] { --tk: var(--tr-blue); }
body[data-page-track="ai-owasp"] .track-head h1,
body[data-page-track="ai-more"] .track-head h1 { color: var(--tr-blue); }
.track-card h3 { margin: 0; font-size: 1.05rem; }
.track-card p { margin: 0; color: var(--ink-mut); font-size: 0.86rem; flex: 1; }
.track-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 6px; }
.track-go { font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent-br); }

.track-head { padding-top: 34px; }
.crumb { color: var(--ink-fnt); }
.crumb:hover { color: var(--accent-br); }
.track-list { margin: 22px 0 40px; }
.track-list .ex-pane-list { border: 1px solid var(--line); border-radius: var(--r-md); }
.track-list .ex-pane-row { padding: 15px 18px; }
.track-head .ex-pane-note, .track-head .ex-pane-progress { margin: 14px 0; }

.verify { margin: 10px 0 40px; }
.skill-chips { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
#cert-verify-result {
  margin-top: 14px;
  border: 1px solid var(--accent-line);
  background: var(--accent-dim);
  border-radius: var(--r-md);
  padding: 16px 20px;
}
#cert-verify-result h3 { margin: 0 0 4px; color: var(--accent-br); }

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1020px) {
  .explorer { grid-template-columns: 280px minmax(0, 1fr); gap: 18px; }
  .lab-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .dash-shell { grid-template-columns: 1fr; height: auto; }
  .ex-rail { max-height: 40vh; border-right: 0; border-bottom: 1px solid var(--line); }
  .dash-main { min-height: calc(100vh - var(--head-h) - 40vh); }
  .dash-scroll { padding: 22px 20px 96px; }
  body.dash .progress-dock-inner { padding: 0 20px; }
}
@media (max-width: 780px) {
  .wrap { padding: 0 18px; }
  .head-inner { height: auto; padding: 10px 0; flex-wrap: wrap; }
  .site-nav { gap: 0; }
  .site-nav a { padding: 6px 9px; font-size: 0.74rem; }
  .hero, .hero-scan { min-height: auto; padding: 44px 0 32px; }
  .hero h1 { max-width: none; }
  .explorer { grid-template-columns: 1fr; }
  .ex-rail { position: static; max-height: none; }
  .ex-pane { padding: 20px; min-height: 0; }
  .ex-pane-row { grid-template-columns: 48px 1fr auto; }
  .ex-pane-row .pill { display: none; }
  .ex-row { grid-template-columns: 40px 1fr auto; padding-left: 30px; }
  .ex-row .pill { display: none; }
  .lab-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .pd-note { display: none; }
  .foot-inner { flex-direction: column; }
  .wt-item summary { grid-template-columns: 48px 1fr auto; }
}

/* --------------------------------------------------------------------------
   Reduced motion — everything lands in final state
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; filter: none; transition: none; }
  .hero-term .t-caret { animation: none; }
  .progress-fill { transition: none; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}