/* =====================================================================
   BONEHEAD LINUX ACADEMY — Synthwave theme
   Layout: fixed sidebar + scrolling main column; two-pane "work" layout
   (instructions left, terminal right) that stacks on narrow screens.
   One deliberate dark look: midnight base, cyan / purple / pink neon.
   ===================================================================== */
:root {
  color-scheme: dark;
  --bg: #07060f;
  --bg-2: #0c0a1c;
  --panel: #110e24;
  --panel-2: #17133a;
  --line: #2b2558;
  --line-soft: #1f1a42;
  --text: #ece9ff;
  --muted: #a49ecb;
  --cyan: #22e5ff;
  --purple: #b44dff;
  --pink: #ff3fa4;
  --blue: #4d7cff;
  --ok: #3dffa8;
  --warn: #ffc857;
  --bad: #ff5c7a;
  --term-bg: #05040c;
  --font-display: "Chakra Petch", "Segoe UI", "Ubuntu", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", "Ubuntu", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Code", "Ubuntu Mono", Consolas, "DejaVu Sans Mono", monospace;
  --radius: 14px;
  --radius-sm: 9px;
  --glow-cyan: 0 0 0 1px rgba(34, 229, 255, .35), 0 0 22px rgba(34, 229, 255, .18);
  --glow-pink: 0 0 0 1px rgba(255, 63, 164, .4), 0 0 22px rgba(255, 63, 164, .2);
  --term-font: 15px;
  --side-w: 270px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
}
img, svg { max-width: 100%; }
[hidden] { display: none !important; }
a { color: var(--cyan); }
code, kbd, pre, .mono { font-family: var(--font-mono); }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.2; text-wrap: balance; margin: 0; letter-spacing: .01em; }
h1 { font-size: clamp(1.7rem, 1.2rem + 1.8vw, 2.5rem); }
h2 { font-size: clamp(1.3rem, 1.1rem + .7vw, 1.65rem); }
h3 { font-size: 1.12rem; }
p { margin: 0; }
.muted { color: var(--muted); }
.small { font-size: .9rem; }
.tiny { font-size: .78rem; }
.ok-text { color: var(--ok); }
.bad-text { color: var(--bad); }
.eyebrow {
  font-family: var(--font-display); font-size: .74rem; font-weight: 600;
  letter-spacing: .16em; text-transform: uppercase; color: var(--cyan);
}
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--cyan); color: #000; padding: 8px 14px; border-radius: 8px; font-weight: 600; }
.skip-link:focus { top: 12px; }

:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; border-radius: 6px; }

/* ---------- ambient backdrop: faint horizon grid ---------- */
.backdrop {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(1100px 520px at 85% -10%, rgba(180, 77, 255, .16), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(34, 229, 255, .09), transparent 60%),
    radial-gradient(700px 380px at 50% 115%, rgba(255, 63, 164, .14), transparent 65%),
    var(--bg);
}
.backdrop::after {
  content: ""; position: absolute; left: -20%; right: -20%; bottom: 0; height: 38vh;
  background-image:
    linear-gradient(rgba(180, 77, 255, .22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(180, 77, 255, .22) 1px, transparent 1px);
  background-size: 64px 40px;
  transform: perspective(380px) rotateX(62deg);
  transform-origin: bottom;
  mask-image: linear-gradient(to top, rgba(0, 0, 0, .55), transparent 85%);
  -webkit-mask-image: linear-gradient(to top, rgba(0, 0, 0, .55), transparent 85%);
}

/* ---------- app shell ---------- */
.app { display: grid; grid-template-columns: var(--side-w) minmax(0, 1fr); min-height: 100vh; }
.sidebar {
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
  background: linear-gradient(180deg, rgba(17, 14, 36, .92), rgba(9, 8, 22, .94));
  border-right: 1px solid var(--line-soft);
  padding: 22px 16px 28px;
  display: flex; flex-direction: column; gap: 18px;
}
.brand { display: flex; align-items: center; gap: 12px; padding: 0 6px; }
.brand-mark { width: 42px; height: 42px; flex: none; filter: drop-shadow(0 0 8px rgba(34, 229, 255, .35)); }
.brand-text { display: flex; flex-direction: column; line-height: 1.05; min-width: 0; }
.brand-name {
  font-family: var(--font-display); font-weight: 700; font-size: 1.35rem; letter-spacing: .14em;
  background: linear-gradient(90deg, var(--cyan), var(--purple) 55%, var(--pink));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.brand-sub { font-family: var(--font-display); font-size: .78rem; letter-spacing: .3em; text-transform: uppercase; color: var(--muted); }
.menu-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--line); border-radius: 10px; width: 44px; height: 40px; cursor: pointer; }
.burger, .burger::before, .burger::after { display: block; width: 18px; height: 2px; background: var(--text); margin: auto; position: relative; content: ""; transition: transform .2s; }
.burger::before { position: absolute; top: -6px; } .burger::after { position: absolute; top: 6px; }

.nav { display: flex; flex-direction: column; gap: 3px; }
.nav-heading { font-family: var(--font-display); font-size: .7rem; letter-spacing: .18em; text-transform: uppercase; color: var(--muted); margin: 14px 10px 4px; opacity: .8; }
.nav a {
  display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: 10px;
  color: var(--text); text-decoration: none; font-size: .95rem; border: 1px solid transparent;
  transition: background .15s, border-color .15s;
}
.nav a:hover { background: rgba(255, 255, 255, .04); border-color: var(--line-soft); }
.nav a.active { background: linear-gradient(90deg, rgba(34, 229, 255, .12), rgba(180, 77, 255, .06)); border-color: rgba(34, 229, 255, .35); }
.nav a.is-locked { color: var(--muted); }
.nav-ico { width: 30px; height: 26px; flex: none; display: grid; place-items: center; font-family: var(--font-mono); font-size: .72rem; font-weight: 600; color: var(--cyan); background: rgba(34, 229, 255, .08); border-radius: 7px; }
.nav-state { margin-left: auto; font-size: .72rem; color: var(--muted); font-family: var(--font-mono); }
.nav-state.ok { color: var(--ok); }
.nav-lock { margin-left: auto; width: 16px; height: 16px; display: grid; }
.nav-lock svg { width: 16px; height: 16px; }
.nav-lessons { display: flex; flex-direction: column; gap: 3px; }
.nav-label { min-width: 0; }
.app-version { padding: 10px 10px 0; opacity: .7; }

.side-card { margin-top: 18px; padding: 14px; border-radius: var(--radius); background: rgba(23, 19, 58, .7); border: 1px solid var(--line); display: flex; flex-direction: column; gap: 4px; }
.side-rank { font-family: var(--font-display); font-size: 1.25rem; font-weight: 700; color: var(--text); }
.goal-eyebrow { margin-top: 10px; color: var(--pink); }
.storage-warn { color: var(--warn); padding: 8px 10px; }

.main { padding-block: 32px 64px; padding-left: max(16px, min(4vw, 48px)); padding-right: max(16px, min(4vw, 48px)); min-width: 0; outline: none; }
.main > * + * { margin-top: 26px; }
.main.enter > * { animation: rise .35s ease both; }
@keyframes rise { from { opacity: .001; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ---------- icons ---------- */
svg[aria-hidden="true"]:not(.emblem):not(.brand-mark):not(.ring) { width: 1.1em; height: 1.1em; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.btn svg[viewBox="0 0 24 24"] path[d^="M8 5v14"] { fill: currentColor; stroke: none; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: var(--font-display); font-weight: 600; font-size: .98rem; letter-spacing: .03em;
  padding: 11px 20px; border-radius: 11px; border: 1px solid var(--line);
  background: var(--panel-2); color: var(--text); cursor: pointer; text-decoration: none;
  transition: transform .15s ease, box-shadow .2s ease, background .2s, border-color .2s;
  min-height: 44px;
}
.btn:hover { border-color: var(--cyan); box-shadow: var(--glow-cyan); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn[disabled], .btn-disabled { opacity: .45; cursor: not-allowed; transform: none !important; box-shadow: none !important; }
.btn-primary {
  background: linear-gradient(100deg, #0fb4cc, #7a3bff 55%, #e0338f);
  border-color: transparent; color: #fff; text-shadow: 0 1px 2px rgba(0, 0, 0, .4);
  box-shadow: 0 6px 24px rgba(122, 59, 255, .3);
}
.btn-primary:hover { box-shadow: 0 8px 30px rgba(255, 63, 164, .35), var(--glow-pink); border-color: transparent; }
.btn-ghost { background: transparent; }
.btn-danger { background: rgba(255, 92, 122, .12); border-color: rgba(255, 92, 122, .5); color: #ffd3dc; }
.btn-danger:hover { border-color: var(--bad); box-shadow: 0 0 18px rgba(255, 92, 122, .3); }
.btn-small { padding: 7px 14px; font-size: .88rem; min-height: 38px; }

/* ---------- generic bits ---------- */
.panel { background: linear-gradient(180deg, rgba(23, 19, 58, .78), rgba(17, 14, 36, .82)); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(18px, 2.5vw, 28px); }
.panel-title { font-size: 1.15rem; margin-bottom: 14px; }
.bar { height: 10px; border-radius: 99px; background: rgba(255, 255, 255, .06); overflow: hidden; border: 1px solid var(--line-soft); }
.bar > span { display: block; height: 100%; width: 0; border-radius: inherit; background: linear-gradient(90deg, var(--cyan), var(--purple), var(--pink)); box-shadow: 0 0 12px rgba(34, 229, 255, .5); transition: width .6s ease; }
.bar.thin { height: 6px; margin: 6px 0 2px; }
.bar.pink > span { background: linear-gradient(90deg, var(--purple), var(--pink)); }
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 3px 11px; border-radius: 99px; font-size: .76rem; font-weight: 600; font-family: var(--font-display); letter-spacing: .06em; text-transform: uppercase; border: 1px solid; white-space: nowrap; }
.pill svg { width: 12px !important; height: 12px !important; }
.pill-cyan { color: var(--cyan); border-color: rgba(34, 229, 255, .45); background: rgba(34, 229, 255, .08); }
.pill-pink { color: var(--pink); border-color: rgba(255, 63, 164, .45); background: rgba(255, 63, 164, .08); }
.pill-green { color: var(--ok); border-color: rgba(61, 255, 168, .45); background: rgba(61, 255, 168, .08); }
.pill-dim { color: var(--muted); border-color: var(--line); background: rgba(255, 255, 255, .03); }
.req { font-size: .68rem; font-family: var(--font-display); letter-spacing: .1em; text-transform: uppercase; color: var(--pink); border: 1px solid rgba(255, 63, 164, .4); padding: 0 6px; border-radius: 5px; vertical-align: 2px; }
kbd { display: inline-block; padding: 1px 7px; border-radius: 6px; border: 1px solid var(--line); border-bottom-width: 2px; background: var(--panel-2); font-size: .85em; color: var(--cyan); }
.link-more { display: inline-flex; gap: 6px; align-items: center; margin-top: 14px; text-decoration: none; font-weight: 600; font-size: .92rem; }

/* ---------- dashboard ---------- */
.dash-hero { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(260px, 1fr); gap: 22px; align-items: stretch; }
.hero-copy { display: flex; flex-direction: column; gap: 14px; justify-content: center; padding: 8px 0; }
.glow-text { background: linear-gradient(90deg, var(--cyan), var(--purple) 50%, var(--pink)); -webkit-background-clip: text; background-clip: text; color: transparent; text-shadow: 0 0 30px rgba(180, 77, 255, .25); }
.hero-sub { color: var(--muted); max-width: 60ch; font-size: 1.04rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 6px; }
.rank-panel { display: flex; align-items: center; gap: 18px; padding: 22px; border-radius: var(--radius); border: 1px solid rgba(180, 77, 255, .4); background: radial-gradient(circle at 20% 20%, rgba(180, 77, 255, .18), transparent 60%), var(--panel); box-shadow: 0 0 40px rgba(180, 77, 255, .12); }
.emblem { width: 104px; height: 104px; flex: none; filter: drop-shadow(0 0 12px rgba(180, 77, 255, .5)); }
.rank-text { display: flex; flex-direction: column; gap: 4px; min-width: 0; flex: 1; }
.rank-name { font-family: var(--font-display); font-size: 1.9rem; font-weight: 700; line-height: 1.1; }
.rank-level { color: var(--muted); font-family: var(--font-mono); font-size: .9rem; }

.stat-row { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 14px; }
.stat { background: var(--panel); border: 1px solid var(--line-soft); border-radius: var(--radius); padding: 16px 18px; display: flex; flex-direction: column; gap: 2px; }
.stat-num { font-family: var(--font-display); font-size: 1.75rem; font-weight: 700; color: var(--text); font-variant-numeric: tabular-nums; line-height: 1.15; }
.stat-num small { font-size: .9rem; color: var(--muted); font-weight: 500; }
.stat-label { color: var(--muted); font-size: .84rem; }
.stat-goal { flex-direction: row; align-items: center; gap: 12px; }
.stat-goal > div { display: flex; flex-direction: column; }
.ring { width: 50px; height: 50px; transform: rotate(-90deg); flex: none; }
.ring-bg { fill: none; stroke: rgba(255, 255, 255, .07); stroke-width: 5; }
.ring-fg { fill: none; stroke: var(--pink); stroke-width: 5; stroke-linecap: round; filter: drop-shadow(0 0 4px rgba(255, 63, 164, .6)); }

.dash-section { display: flex; flex-direction: column; gap: 16px; }
.dash-section.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.section-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 6px 18px; }

.lesson-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.lesson-card { position: relative; display: flex; flex-direction: column; gap: 12px; padding: 22px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--panel); transition: transform .2s ease, box-shadow .2s, border-color .2s; overflow: hidden; }
.lesson-card.unlocked { border-color: rgba(34, 229, 255, .4); }
.lesson-card.unlocked:hover { transform: translateY(-3px); box-shadow: var(--glow-cyan); }
.lesson-card.mastered { border-color: rgba(61, 255, 168, .45); }
.lesson-card.locked { background: repeating-linear-gradient(135deg, rgba(255, 255, 255, .015) 0 12px, transparent 12px 24px), var(--panel); }
.lesson-card.locked h3, .lesson-card.locked > p { opacity: .75; }
.lesson-card .btn { align-self: flex-start; margin-top: auto; }
.lc-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.lc-num { font-family: var(--font-mono); font-size: .8rem; color: var(--pink); letter-spacing: .12em; text-transform: uppercase; }
.lc-meta { display: flex; flex-wrap: wrap; gap: 4px 14px; color: var(--muted); }
.lock-req { border: 1px dashed var(--line); border-radius: var(--radius-sm); padding: 10px 12px; display: flex; flex-direction: column; gap: 6px; }
.mini-req { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; font-size: .88rem; color: var(--muted); }
.mini-req li { display: flex; gap: 8px; align-items: center; }
.mini-req li.ok { color: var(--ok); }

.checklist { list-style: none; margin: 0 0 12px; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.checklist li { display: grid; grid-template-columns: 26px minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 10px 12px; border-radius: 10px; background: rgba(255, 255, 255, .02); border: 1px solid var(--line-soft); }
.checklist li.done { border-color: rgba(61, 255, 168, .3); }
.ci-box { width: 22px; height: 22px; border-radius: 6px; border: 1.5px solid var(--line); display: grid; place-items: center; color: var(--ok); flex: none; }
li.done .ci-box, li.ok .ci-box { border-color: var(--ok); background: rgba(61, 255, 168, .1); }
.ci-detail { font-family: var(--font-mono); font-size: .8rem; color: var(--muted); white-space: nowrap; }

.ach-mini { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.ach-mini li { display: flex; gap: 12px; align-items: center; }
.ach-mini li > span:last-child { display: flex; flex-direction: column; }
.badge-ico { width: 46px; height: 46px; flex: none; display: grid; place-items: center; border-radius: 12px; font-family: var(--font-mono); font-weight: 600; font-size: .78rem; color: var(--cyan); background: radial-gradient(circle at 30% 25%, rgba(34, 229, 255, .25), rgba(180, 77, 255, .15)); border: 1px solid rgba(34, 229, 255, .45); box-shadow: 0 0 14px rgba(34, 229, 255, .2); }

.roadmap { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 14px; }
.road-level { padding: 18px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--line-soft); display: flex; flex-direction: column; gap: 12px; }
.road-level.current { border-color: rgba(34, 229, 255, .45); }
.road-level.future { opacity: .8; }
.road-head { display: flex; align-items: center; gap: 12px; }
.road-head > div { flex: 1; min-width: 0; }
.road-n { font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; width: 44px; height: 44px; display: grid; place-items: center; border-radius: 12px; background: var(--panel-2); border: 1px solid var(--line); color: var(--pink); flex: none; }
.topic-chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.topic-chips li { font-size: .78rem; padding: 3px 10px; border-radius: 99px; background: rgba(255, 255, 255, .04); border: 1px solid var(--line-soft); color: var(--muted); }
.topic-chips.big li { font-size: .9rem; padding: 6px 14px; color: var(--text); }

/* ---------- lesson header + stepper ---------- */
.lesson-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 14px; }
.lesson-head > div:first-child { display: flex; flex-direction: column; gap: 8px; max-width: 75ch; }
.stepper { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; scroll-margin-top: 16px; }
.step { display: flex; align-items: center; gap: 10px; text-align: left; padding: 12px 14px; border-radius: 12px; background: var(--panel); border: 1px solid var(--line-soft); color: var(--text); cursor: pointer; font: inherit; transition: border-color .15s, box-shadow .2s, background .2s; min-width: 0; }
.step:hover { border-color: var(--line); }
.step.current { border-color: var(--cyan); box-shadow: var(--glow-cyan); background: linear-gradient(180deg, rgba(34, 229, 255, .08), var(--panel)); }
.step.locked { opacity: .55; cursor: not-allowed; }
.step-num { width: 32px; height: 32px; flex: none; border-radius: 50%; display: grid; place-items: center; font-family: var(--font-display); font-weight: 700; background: var(--panel-2); border: 1px solid var(--line); color: var(--cyan); }
.step.done .step-num { color: var(--ok); border-color: rgba(61, 255, 168, .55); background: rgba(61, 255, 168, .08); }
.step-text { display: flex; flex-direction: column; min-width: 0; line-height: 1.25; }
.step-label { font-family: var(--font-display); font-weight: 600; font-size: .95rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.step-sub { font-size: .76rem; color: var(--muted); font-family: var(--font-mono); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ---------- Learn ---------- */
.learn-layout { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 24px; align-items: start; }
.toc { position: sticky; top: 20px; display: flex; flex-direction: column; gap: 10px; }
.toc ol { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.toc-item, .task-li { width: 100%; display: flex; align-items: center; gap: 10px; text-align: left; font: inherit; font-size: .92rem; color: var(--text); background: transparent; border: 1px solid transparent; border-radius: 10px; padding: 8px 10px; cursor: pointer; }
.toc-item:hover, .task-li:hover { background: rgba(255, 255, 255, .04); }
.toc-item.current, .task-li.current { border-color: rgba(34, 229, 255, .45); background: rgba(34, 229, 255, .07); }
.toc-mark { width: 24px; height: 24px; flex: none; border-radius: 50%; display: grid; place-items: center; font-size: .75rem; font-family: var(--font-mono); background: var(--panel-2); border: 1px solid var(--line); color: var(--muted); }
.done > .toc-mark { color: var(--ok); border-color: rgba(61, 255, 168, .5); }
.toc-mark svg { width: 13px !important; height: 13px !important; }

.reading { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(20px, 3vw, 40px); display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.prose { max-width: 72ch; display: flex; flex-direction: column; gap: 14px; font-size: 1.03rem; }
.prose h3 { margin-top: 10px; color: var(--cyan); }
.prose .lead { font-size: 1.12rem; color: var(--text); }
.prose ul, .prose ol { margin: 0; padding-left: 1.3em; display: flex; flex-direction: column; gap: 6px; }
.prose ul.ticks { list-style: none; padding-left: 0; }
.prose ul.ticks li { padding-left: 24px; position: relative; }
.prose ul.ticks li::before { content: ""; position: absolute; left: 4px; top: .62em; width: 8px; height: 8px; border-radius: 2px; background: var(--pink); box-shadow: 0 0 8px var(--pink); transform: rotate(45deg); }
.prose code, .task-text code, .small code, .ci-label code, td code, .glossary code, .task-card code, .review code, .mistakes code { background: rgba(34, 229, 255, .08); border: 1px solid rgba(34, 229, 255, .2); color: #bff6ff; padding: 1px 6px; border-radius: 6px; font-size: .9em; overflow-wrap: anywhere; }
dfn { font-style: normal; font-weight: 600; color: var(--pink); }

.analogy { border-radius: var(--radius-sm); padding: 16px 18px; background: linear-gradient(135deg, rgba(255, 63, 164, .09), rgba(180, 77, 255, .06)); border: 1px solid rgba(255, 63, 164, .35); display: flex; flex-direction: column; gap: 8px; }
.analogy-tag { font-family: var(--font-display); font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; color: var(--pink); font-weight: 700; }
.callout { border-radius: var(--radius-sm); padding: 14px 18px; background: rgba(34, 229, 255, .06); border: 1px solid rgba(34, 229, 255, .3); }
.callout.warn { background: rgba(255, 200, 87, .07); border-color: rgba(255, 200, 87, .4); }

.data-table-wrap, .tree-wrap, .ls-anatomy-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.data-table th, .data-table td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
.data-table th { font-family: var(--font-display); font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.data-table.parts td:first-child { width: 1%; white-space: nowrap; }
.prose > .data-table { display: block; overflow-x: auto; }

.anatomy { display: flex; flex-wrap: wrap; gap: 10px; }
.anat-part { flex: 1 1 140px; display: flex; flex-direction: column; gap: 2px; padding: 12px 14px; border-radius: 10px; background: var(--term-bg); border: 1px solid var(--line); }
.anat-part code { font-size: 1.25rem; background: none !important; border: none !important; padding: 0 !important; }
.anat-part span { font-family: var(--font-display); font-weight: 600; }
.anat-part small { color: var(--muted); }
.c-cmd { color: var(--cyan) !important; } .c-opt { color: var(--pink) !important; } .c-arg { color: #c9a6ff !important; }

.prompt-anatomy { display: flex; flex-direction: column; gap: 14px; padding: 18px; border-radius: var(--radius-sm); background: var(--term-bg); border: 1px solid var(--line); }
.pa-line { font-family: var(--font-mono); font-size: clamp(1rem, .8rem + 1vw, 1.4rem); overflow-x: auto; white-space: nowrap; }
.pa-legend { margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; }
.pa-legend > div { display: flex; flex-direction: column; gap: 2px; padding: 10px 12px; border-left: 3px solid var(--line); background: rgba(255, 255, 255, .02); }
.pa-legend dt { font-family: var(--font-mono); font-weight: 600; }
.pa-legend dd { margin: 0; font-size: .9rem; color: var(--muted); }
.p-user { color: #4dffb8; } .p-at, .p-colon { color: var(--muted); } .p-host { color: #4dffb8; } .p-path { color: #5c9dff; } .p-sym { color: var(--text); }
.pa-legend > div:nth-child(1) { border-left-color: #4dffb8; } .pa-legend > div:nth-child(2) { border-left-color: #4dffb8; } .pa-legend > div:nth-child(3) { border-left-color: #5c9dff; }
.p-cursor { display: inline-block; width: .6em; height: 1.1em; vertical-align: -.15em; background: var(--cyan); margin-left: 4px; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.tree { margin: 0; padding: 16px 18px; border-radius: var(--radius-sm); background: var(--term-bg); border: 1px solid var(--line); font-size: .9rem; line-height: 1.5; color: var(--muted); }
.t-dir { color: #5c9dff; font-weight: 600; }
.t-note { color: var(--pink); opacity: .85; }

.glossary { margin: 0; display: flex; flex-direction: column; gap: 10px; }
.glossary > div { display: grid; grid-template-columns: minmax(130px, 200px) minmax(0, 1fr); gap: 14px; padding: 10px 0; border-bottom: 1px solid var(--line-soft); }
.glossary dt { font-weight: 600; font-family: var(--font-display); }
.glossary dd { margin: 0; color: var(--muted); }
.glossary.compact > div { padding: 6px 0; grid-template-columns: minmax(110px, 150px) minmax(0, 1fr); }

.two-col { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.path-card { padding: 16px 18px; border-radius: var(--radius-sm); display: flex; flex-direction: column; gap: 8px; border: 1px solid; min-width: 0; }
.path-card h3 { margin: 0 !important; }
.path-card.abs { border-color: rgba(34, 229, 255, .4); background: rgba(34, 229, 255, .05); }
.path-card.rel { border-color: rgba(255, 63, 164, .4); background: rgba(255, 63, 164, .05); }
.path-card.rel h3 { color: var(--pink); }

pre.code { margin: 0; padding: 12px 16px; border-radius: 10px; background: var(--term-bg); border: 1px solid var(--line); color: #bff6ff; font-size: .95rem; overflow-x: auto; white-space: pre; }

.quick-check { margin-top: 10px; padding: 18px; border-radius: var(--radius-sm); border: 1px dashed rgba(180, 77, 255, .5); background: rgba(180, 77, 255, .05); display: flex; flex-direction: column; gap: 10px; }
.qc-label { display: flex; align-items: center; gap: 8px; font-family: var(--font-display); font-weight: 600; color: #d8b6ff; }
.qc-q { font-weight: 600; }
.qc-options { display: flex; flex-direction: column; gap: 8px; }
.qc-opt { text-align: left; font: inherit; color: var(--text); padding: 10px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--panel-2); cursor: pointer; }
.qc-opt:hover { border-color: var(--purple); }
.qc-opt.picked-ok { border-color: var(--ok); background: rgba(61, 255, 168, .08); }
.qc-opt.picked-bad { border-color: var(--bad); background: rgba(255, 92, 122, .08); }
.qc-feedback.ok { color: var(--ok); } .qc-feedback.bad { color: #ffb3c1; }

.reading-nav { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; margin-top: 8px; padding-top: 18px; border-top: 1px solid var(--line-soft); }

/* ---------- Commands ---------- */
.cmd-tabs { display: flex; gap: 8px; flex-wrap: wrap; }
.cmd-tab { display: inline-flex; align-items: center; gap: 8px; font: inherit; padding: 9px 20px; border-radius: 11px; background: var(--panel); border: 1px solid var(--line-soft); color: var(--text); cursor: pointer; }
.cmd-tab code { font-size: 1.05rem; font-weight: 600; color: var(--cyan); }
.cmd-tab.current { border-color: var(--cyan); box-shadow: var(--glow-cyan); }
.tab-check { color: var(--ok); display: grid; }
.cmd-card { margin-top: 14px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(20px, 3vw, 36px); display: flex; flex-direction: column; gap: 22px; }
.cmd-head { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.cmd-big { font-size: clamp(2.4rem, 2rem + 2vw, 3.4rem); font-weight: 600; color: var(--cyan); text-shadow: 0 0 22px rgba(34, 229, 255, .45); padding: 6px 20px; border: 1px solid rgba(34, 229, 255, .4); border-radius: 14px; background: var(--term-bg); }
.cmd-full { font-family: var(--font-display); font-size: 1.3rem; color: var(--pink); text-transform: lowercase; letter-spacing: .03em; }
.cmd-plain { font-size: 1.1rem; }
.cmd-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(300px, 1fr); gap: 26px; align-items: start; }
.cmd-side { position: sticky; top: 20px; }
.demo-box { display: flex; flex-direction: column; gap: 10px; padding: 16px; border-radius: var(--radius); background: rgba(23, 19, 58, .6); border: 1px solid var(--line); }
.demo-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.examples { display: flex; flex-direction: column; gap: 14px; }
.example { display: flex; flex-direction: column; gap: 6px; }
.ex-term { font-family: var(--font-mono); font-size: .92rem; padding: 12px 14px; border-radius: 10px; background: var(--term-bg); border: 1px solid var(--line); overflow-x: auto; }
.ex-prompt { color: #4dffb8; white-space: nowrap; }
.ex-cmd { color: var(--text); font-weight: 600; }
.ex-out { color: var(--muted); white-space: pre-wrap; margin-top: 4px; }
.ls-anatomy { font-family: var(--font-mono); padding: 14px; border-radius: 10px; background: var(--term-bg); border: 1px solid var(--line); white-space: nowrap; font-size: .95rem; }
.la-perm { color: #ffb84d; } .la-link { color: var(--muted); } .la-own { color: #4dffb8; } .la-grp { color: #3fc9a0; } .la-size { color: var(--pink); } .la-date { color: #c9a6ff; } .la-name { color: #5c9dff; font-weight: 600; }
.glossary dt.la-perm, .glossary dt.la-link, .glossary dt.la-own, .glossary dt.la-grp, .glossary dt.la-size, .glossary dt.la-date, .glossary dt.la-name { font-family: var(--font-mono); }
.mistakes { list-style: none !important; padding: 0 !important; display: flex; flex-direction: column; gap: 10px; }
.mistakes li { display: flex; flex-direction: column; gap: 4px; padding: 12px 14px; border-radius: 10px; border: 1px solid rgba(255, 92, 122, .3); background: rgba(255, 92, 122, .05); }
.mistakes code.bad { align-self: flex-start; color: #ffb3c1 !important; border-color: rgba(255, 92, 122, .4) !important; background: rgba(255, 92, 122, .1) !important; text-decoration: line-through; text-decoration-color: rgba(255, 92, 122, .6); }
.fixline { font-size: .92rem; color: var(--muted); }
.mistakes code.good { color: #b8ffe0 !important; border-color: rgba(61, 255, 168, .4) !important; background: rgba(61, 255, 168, .08) !important; }

/* ---------- Terminal ---------- */
.term { display: flex; flex-direction: column; border-radius: var(--radius); overflow: hidden; background: var(--term-bg); border: 1px solid rgba(34, 229, 255, .35); box-shadow: 0 0 0 1px rgba(0, 0, 0, .5), 0 18px 50px rgba(0, 0, 0, .55), 0 0 32px rgba(34, 229, 255, .1); min-width: 0; }
.term:focus { outline: 2px solid var(--cyan); outline-offset: 2px; }
.term-bar { display: flex; align-items: center; gap: 12px; padding: 9px 14px; background: linear-gradient(180deg, #1a1638, #120f28); border-bottom: 1px solid var(--line); }
.term-dots { display: flex; gap: 6px; }
.term-dots span { width: 11px; height: 11px; border-radius: 50%; background: #ff5f7e; }
.term-dots span:nth-child(2) { background: #ffc857; } .term-dots span:nth-child(3) { background: #3dffa8; }
.term-title { flex: 1; min-width: 0; text-align: center; font-family: var(--font-mono); font-size: .8rem; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sim-badge { font-family: var(--font-display); font-size: .64rem; font-weight: 700; letter-spacing: .16em; color: var(--warn); border: 1px solid rgba(255, 200, 87, .5); padding: 2px 8px; border-radius: 6px; background: rgba(255, 200, 87, .08); white-space: nowrap; }
.term-actions:empty { display: none; }
.term-screen { position: relative; padding: 14px 16px 16px; font-family: var(--font-mono); font-size: var(--term-font); line-height: 1.5; color: #dcdcf0; overflow-y: auto; min-height: var(--term-min, 360px); max-height: 62vh; cursor: text; background: radial-gradient(ellipse at top, rgba(34, 229, 255, .04), transparent 60%), var(--term-bg); }
.term-out .tl { white-space: pre-wrap; overflow-wrap: anywhere; min-height: 1.5em; }
.term-out .tl.grid { display: flex; flex-wrap: wrap; gap: 0 2ch; }
.tl.banner { color: var(--cyan); font-weight: 600; }
.tl.dim, .c-dim { color: #7d78a6; }
.c-err { color: #ff7d95; }
.c-warn { color: var(--warn); }
.c-hdr { color: var(--text); font-weight: 600; }
.c-dir { color: #5c9dff; font-weight: 600; }
.c-exec { color: #4dffb8; font-weight: 600; }
.c-media { color: #e77dff; }
.c-archive { color: #ff6b6b; }
.c-meta { color: #9a94c4; }
.tl.echo .term-prompt { margin-right: 0; }
.echo-cmd { color: #fff; }
.term-input-row { display: flex; align-items: baseline; gap: 0; min-width: 0; }
.term-prompt { white-space: nowrap; flex: none; max-width: 70%; overflow: hidden; text-overflow: ellipsis; }
.term-prompt .p-user, .term-prompt .p-host { color: #4dffb8; font-weight: 600; }
.term-prompt .p-path { color: #5c9dff; font-weight: 600; }
.term-input { flex: 1; min-width: 4ch; background: transparent; border: 0; outline: none; color: #fff; font: inherit; caret-color: var(--cyan); padding: 0; }
.term-input:focus { outline: none; }
.term:focus-within { border-color: rgba(34, 229, 255, .7); }
.term-foot { display: flex; flex-wrap: wrap; gap: 4px 14px; padding: 7px 14px; font-size: .74rem; color: #7d78a6; border-top: 1px solid var(--line-soft); background: #0a0918; }
.term-foot kbd { font-size: .7rem; padding: 0 5px; }

.coach { margin: 8px 0 10px; font-family: var(--font-body); font-size: .92rem; border-radius: 10px; border: 1px solid rgba(255, 92, 122, .45); background: rgba(255, 92, 122, .07); white-space: normal; }
.coach-note { border-color: rgba(255, 200, 87, .45); background: rgba(255, 200, 87, .06); }
.coach summary { cursor: pointer; padding: 8px 12px; display: flex; gap: 10px; align-items: center; list-style: none; }
.coach summary::-webkit-details-marker { display: none; }
.coach summary::after { content: "+"; margin-left: auto; font-family: var(--font-mono); color: var(--muted); }
.coach details[open] summary::after { content: "−"; }
.coach-tag { font-family: var(--font-display); font-size: .66rem; letter-spacing: .14em; text-transform: uppercase; font-weight: 700; padding: 1px 7px; border-radius: 5px; background: rgba(255, 92, 122, .2); color: #ffc2cd; flex: none; }
.coach-note .coach-tag { background: rgba(255, 200, 87, .2); color: #ffe2a3; }
.coach-title { font-weight: 600; color: #fff; }
.coach-body { margin: 0; padding: 0 12px 10px; display: grid; gap: 6px; }
.coach-body > div { display: grid; grid-template-columns: 140px minmax(0, 1fr); gap: 10px; }
.coach-body dt { font-family: var(--font-display); font-size: .78rem; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); padding-top: 2px; }
.coach-body dd { margin: 0; color: #e6e3fb; }

/* ---------- work layout: drills / challenges / lab ---------- */
.work-layout { display: grid; grid-template-columns: minmax(300px, 420px) minmax(0, 1fr); gap: 22px; align-items: start; }
.work-panel { display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.work-term { position: sticky; top: 16px; min-width: 0; }
.work-progress { display: flex; flex-direction: column; gap: 6px; }
.task-card { padding: 20px; border-radius: var(--radius); background: var(--panel); border: 1px solid rgba(34, 229, 255, .35); display: flex; flex-direction: column; gap: 12px; box-shadow: 0 0 28px rgba(34, 229, 255, .06); }
.task-card.mission { border-color: rgba(255, 63, 164, .4); box-shadow: 0 0 28px rgba(255, 63, 164, .07); }
.task-step { font-family: var(--font-mono); font-size: .8rem; color: var(--pink); }
.task-title { font-size: 1.35rem; }
.task-text { font-size: 1.02rem; }
.task-feedback { padding: 12px 14px; border-radius: 10px; font-size: .94rem; border: 1px solid var(--line); background: rgba(255, 255, 255, .02); color: var(--muted); }
.task-feedback.ok { color: #d4ffe9; border-color: rgba(61, 255, 168, .45); background: rgba(61, 255, 168, .07); }
.task-feedback.warn { color: #ffeac0; border-color: rgba(255, 200, 87, .45); background: rgba(255, 200, 87, .07); }
.task-feedback.bad { color: #ffd3dc; border-color: rgba(255, 92, 122, .5); background: rgba(255, 92, 122, .08); }
.task-feedback.info { color: var(--text); }
.task-feedback .btn { margin-left: 8px; }
.next-up { display: inline-block; margin-top: 6px; font-family: var(--font-display); font-weight: 600; color: var(--cyan); }
.task-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.task-list-wrap summary { cursor: pointer; font-family: var(--font-display); font-weight: 600; color: var(--muted); padding: 4px 0; }
.task-list { list-style: none; margin: 8px 0 0; padding: 0; display: flex; flex-direction: column; gap: 3px; }
.task-group { padding: 10px 10px 2px; }
.task-group code { font-size: .74rem; letter-spacing: .12em; text-transform: uppercase; color: var(--pink); }
code.grp { color: var(--cyan); font-size: .8rem; }
.p-ask { color: var(--warn); font-weight: 600; white-space: pre-wrap; }
.task-li code { margin-left: auto; font-size: .76rem; color: var(--muted); background: none; border: 0; padding: 0; white-space: nowrap; }
.task-li.done { color: var(--muted); }
.objectives { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.objectives li { display: flex; gap: 10px; align-items: flex-start; font-size: .95rem; }
.objectives li.ok { color: var(--ok); }
.objectives.lab li { padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line-soft); background: var(--panel); }
.hints { display: flex; flex-direction: column; gap: 8px; }
.hints p { padding: 10px 12px; border-radius: 10px; background: rgba(180, 77, 255, .08); border: 1px solid rgba(180, 77, 255, .35); font-size: .94rem; }
.hint-tag { font-family: var(--font-display); font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: #d8b6ff; font-weight: 700; margin-right: 8px; }

.field-label { display: block; font-family: var(--font-display); font-weight: 600; font-size: .88rem; color: var(--muted); margin: 6px 0 4px; }
.select, .text-input { width: 100%; font: inherit; color: var(--text); background: var(--term-bg); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; min-height: 44px; }
.select:focus, .text-input:focus { border-color: var(--cyan); outline: none; box-shadow: var(--glow-cyan); }
textarea.text-input { font-size: .82rem; resize: vertical; }
.file-input { font: inherit; color: var(--muted); max-width: 100%; }
.check-row { display: flex; gap: 10px; align-items: flex-start; margin-top: 12px; font-size: .95rem; cursor: pointer; }
.check-row input { width: 18px; height: 18px; margin-top: 3px; accent-color: var(--cyan); }
input[type="range"] { width: 100%; accent-color: var(--pink); }
.form { display: flex; flex-direction: column; }
.cheat { padding: 14px 16px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--line-soft); }

/* ---------- Quiz ---------- */
.quiz-intro { display: flex; flex-direction: column; gap: 14px; max-width: 820px; }
.quiz-intro .btn { align-self: flex-start; }
.rules { margin: 0; padding-left: 1.2em; display: flex; flex-direction: column; gap: 8px; }
.hist-title { margin-top: 10px; }
.attempts { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.attempts li { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 16px; align-items: center; padding: 8px 12px; border-radius: 9px; background: rgba(255, 255, 255, .02); border: 1px solid var(--line-soft); font-size: .9rem; }
.attempts li strong { font-family: var(--font-mono); }
.attempts li.ok { border-color: rgba(61, 255, 168, .35); }
.attempts li span:last-child { color: var(--muted); }

.quiz { max-width: 860px; display: flex; flex-direction: column; gap: 18px; }
.quiz-top { display: flex; justify-content: space-between; align-items: baseline; }
.qdots { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.qdot { width: 36px; height: 36px; border-radius: 9px; font-family: var(--font-mono); font-size: .85rem; background: var(--panel-2); border: 1px solid var(--line); color: var(--muted); cursor: pointer; }
.qdot.answered { color: var(--text); border-color: rgba(180, 77, 255, .6); background: rgba(180, 77, 255, .15); }
.qdot.current { border-color: var(--cyan); color: var(--cyan); box-shadow: var(--glow-cyan); }
.qcard { margin: 0; border: 0; padding: 0; display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.qcard legend { display: flex; flex-direction: column; gap: 10px; padding: 0; margin-bottom: 4px; }
.qtype { align-self: flex-start; font-family: var(--font-display); font-size: .7rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; padding: 3px 10px; border-radius: 6px; color: var(--cyan); background: rgba(34, 229, 255, .1); border: 1px solid rgba(34, 229, 255, .35); }
.qtype-predict { color: #d8b6ff; background: rgba(180, 77, 255, .12); border-color: rgba(180, 77, 255, .4); }
.qtype-trouble { color: #ffd38a; background: rgba(255, 200, 87, .1); border-color: rgba(255, 200, 87, .4); }
.qtype-cmd, .qtype-text { color: var(--pink); background: rgba(255, 63, 164, .1); border-color: rgba(255, 63, 164, .4); }
.qprompt { font-size: 1.2rem; font-weight: 600; line-height: 1.45; }
.qcode { white-space: pre-wrap; overflow-wrap: anywhere; }
.qopts { display: flex; flex-direction: column; gap: 10px; }
.qopt { display: flex; align-items: flex-start; gap: 12px; padding: 13px 16px; border-radius: 12px; border: 1px solid var(--line); background: var(--panel-2); cursor: pointer; transition: border-color .15s, background .15s; }
.qopt:hover { border-color: var(--purple); }
.qopt input { position: absolute; opacity: 0; pointer-events: none; }
.qopt-key { width: 28px; height: 28px; flex: none; border-radius: 8px; display: grid; place-items: center; font-family: var(--font-mono); font-weight: 600; font-size: .85rem; background: var(--term-bg); border: 1px solid var(--line); color: var(--muted); }
.qopt-text { padding-top: 2px; }
.qopt:has(input:checked) { border-color: var(--cyan); background: rgba(34, 229, 255, .08); box-shadow: var(--glow-cyan); }
.qopt:has(input:checked) .qopt-key { background: var(--cyan); color: #001318; border-color: var(--cyan); }
.qopt:has(input:focus-visible) { outline: 2px solid var(--cyan); outline-offset: 2px; }
.qcmd { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-radius: 10px; background: var(--term-bg); border: 1px solid rgba(34, 229, 255, .4); font-family: var(--font-mono); flex-wrap: wrap; }
.qcmd .q-input { flex: 1; min-width: 12ch; border: 0; background: transparent; padding: 0; min-height: 0; box-shadow: none !important; }
.q-input { width: 100%; font-size: 1.05rem; color: #fff; background: var(--term-bg); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; outline: none; caret-color: var(--cyan); }
.q-input:focus { border-color: var(--cyan); }

.results { display: flex; flex-direction: column; gap: 22px; }
.result-top { display: flex; gap: 28px; align-items: center; flex-wrap: wrap; }
.result-copy { flex: 1; min-width: 260px; display: flex; flex-direction: column; gap: 10px; }
.score-ring { position: relative; width: 168px; height: 168px; flex: none; }
.score-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.score-ring .ring-bg { stroke-width: 9; }
.score-ring .ring-fg { stroke-width: 9; stroke: var(--bad); filter: drop-shadow(0 0 6px rgba(255, 92, 122, .6)); }
.score-ring.pass .ring-fg { stroke: var(--ok); filter: drop-shadow(0 0 6px rgba(61, 255, 168, .6)); }
.score-text { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.score-big { font-family: var(--font-display); font-size: 2.6rem; font-weight: 700; line-height: 1; }
.score-big small { font-size: 1.1rem; color: var(--muted); }
.score-pct { font-family: var(--font-mono); color: var(--muted); }
.result-banner { padding: 16px 18px; border-radius: 12px; display: flex; flex-direction: column; gap: 6px; border: 1px solid; }
.result-banner.pass { border-color: rgba(61, 255, 168, .5); background: rgba(61, 255, 168, .07); }
.result-banner.pass h3 { color: var(--ok); }
.result-banner.fail { border-color: rgba(255, 200, 87, .5); background: rgba(255, 200, 87, .06); }
.result-banner.fail h3 { color: var(--warn); }
.result-banner.perfect { border-color: transparent; background: linear-gradient(var(--panel), var(--panel)) padding-box, linear-gradient(90deg, var(--cyan), var(--purple), var(--pink)) border-box; border: 2px solid transparent; box-shadow: 0 0 40px rgba(255, 63, 164, .25); }
.result-banner.perfect h3 { font-size: 1.5rem; background: linear-gradient(90deg, var(--cyan), var(--pink)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.weak { padding: 16px 18px; border-radius: 12px; border: 1px solid rgba(255, 200, 87, .35); background: rgba(255, 200, 87, .04); display: flex; flex-direction: column; gap: 10px; }
.weak-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.weak-list li { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px; }
.weak-actions { display: flex; gap: 6px; }
.review-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.review { padding: 16px 18px; border-radius: 12px; border: 1px solid var(--line-soft); background: rgba(255, 255, 255, .015); display: flex; flex-direction: column; gap: 8px; }
.review.wrong { border-color: rgba(255, 92, 122, .45); }
.review-head { display: flex; align-items: center; gap: 10px; }
.review-mark { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; flex: none; }
.review.right .review-mark { color: var(--ok); background: rgba(61, 255, 168, .12); }
.review.wrong .review-mark { color: var(--bad); background: rgba(255, 92, 122, .12); }
.review-q { font-weight: 600; }
.lbl { font-family: var(--font-display); font-size: .8rem; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.why summary { cursor: pointer; color: var(--muted); font-size: .9rem; }
.why p { margin-top: 6px; color: var(--muted); }
.why-wrong { padding: 10px 12px; border-radius: 9px; background: rgba(180, 77, 255, .08); border: 1px solid rgba(180, 77, 255, .35); }
.small-term { font-size: .85rem; }
.confetti { position: fixed; inset: 0; pointer-events: none; z-index: 60; }

/* ---------- Lesson 2 locked view ---------- */
.locked-view { max-width: 820px; display: flex; flex-direction: column; gap: 16px; }
.locked-view .btn { align-self: flex-start; }
.lock-hero { display: flex; }
.big-lock { width: 72px; height: 72px; border-radius: 20px; display: grid; place-items: center; background: var(--panel-2); border: 1px solid var(--line); color: var(--pink); box-shadow: 0 0 26px rgba(255, 63, 164, .2); }
.big-lock svg { width: 34px !important; height: 34px !important; }
.big-badge { width: 72px; height: 72px; border-radius: 20px; display: grid; place-items: center; font-family: var(--font-display); font-size: 1.7rem; font-weight: 700; background: linear-gradient(135deg, var(--cyan), var(--purple), var(--pink)); color: #fff; }

/* ---------- Achievements ---------- */
.ladder { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 8px; }
.ladder li { display: flex; flex-direction: column; align-items: center; gap: 6px; text-align: center; padding: 10px 4px; border-radius: 10px; color: var(--muted); }
.ladder-dot { width: 16px; height: 16px; border-radius: 50%; border: 2px solid var(--line); }
.ladder li.past .ladder-dot { background: var(--purple); border-color: var(--purple); }
.ladder li.here { background: rgba(34, 229, 255, .08); color: var(--text); border: 1px solid rgba(34, 229, 255, .4); }
.ladder li.here .ladder-dot { background: var(--cyan); border-color: var(--cyan); box-shadow: 0 0 12px var(--cyan); }
.ladder-name { font-family: var(--font-display); font-weight: 600; font-size: .9rem; }
.ladder-xp { font-family: var(--font-mono); font-size: .74rem; }
.ach-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.ach { display: flex; gap: 14px; align-items: flex-start; padding: 16px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--line-soft); }
.ach h3 { font-size: 1rem; }
.ach.locked { opacity: .6; }
.ach.locked .badge-ico { color: var(--muted); background: var(--panel-2); border-color: var(--line); box-shadow: none; }
.ach.earned { border-color: rgba(34, 229, 255, .35); }

.prefs-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 18px; align-items: start; }
.store-list { margin: 10px 0; padding-left: 1.2em; display: flex; flex-direction: column; gap: 6px; }
.danger-zone { border-color: rgba(255, 92, 122, .35); }
.danger-zone .task-actions, .prefs-grid .task-actions { margin: 10px 0; }

/* ---------- toasts ---------- */
.toasts { position: fixed; right: max(16px, env(safe-area-inset-right, 0px)); bottom: calc(16px + env(safe-area-inset-bottom, 0px)); z-index: 80; display: flex; flex-direction: column; gap: 8px; width: min(360px, calc(100vw - 32px)); pointer-events: none; }
.toast { display: flex; flex-direction: column; gap: 2px; padding: 12px 16px; border-radius: 12px; background: rgba(17, 14, 36, .96); border: 1px solid var(--line); box-shadow: 0 10px 30px rgba(0, 0, 0, .5); animation: toastIn .3s ease both; font-size: .92rem; }
.toast strong { font-family: var(--font-display); }
.toast span { color: var(--muted); font-size: .86rem; }
.toast-xp { border-color: rgba(34, 229, 255, .5); } .toast-xp strong { color: var(--cyan); }
.toast-ach { border-color: rgba(255, 63, 164, .55); box-shadow: 0 0 24px rgba(255, 63, 164, .25); } .toast-ach strong { color: var(--pink); }
.toast-rank { border-color: rgba(180, 77, 255, .7); box-shadow: 0 0 30px rgba(180, 77, 255, .35); } .toast-rank strong { color: #d8b6ff; }
.toast-warn { border-color: rgba(255, 200, 87, .55); } .toast-warn strong { color: var(--warn); }
.toast.out { opacity: 0; transform: translateY(6px); transition: opacity .35s, transform .35s; }
@keyframes toastIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* ---------- reduced motion ---------- */
:root[data-motion="reduce"] *, :root[data-motion="reduce"] *::before, :root[data-motion="reduce"] *::after {
  animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important;
}
:root[data-motion="reduce"] .p-cursor { animation: none; }
:root[data-motion="reduce"] .btn:hover, :root[data-motion="reduce"] .lesson-card:hover { transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 1280px) {
  .stat-row { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .cmd-grid { grid-template-columns: minmax(0, 1fr); }
  .cmd-side { position: static; }
}
@media (max-width: 1100px) {
  .work-layout { grid-template-columns: minmax(0, 1fr); }
  .work-term { position: static; }
  .stepper { grid-template-columns: repeat(5, minmax(140px, 1fr)); overflow-x: auto; padding-bottom: 4px; }
  .learn-layout { grid-template-columns: minmax(0, 1fr); }
  .toc { position: static; }
  .toc ol { flex-direction: row; flex-wrap: wrap; }
  .toc-item { width: auto; }
  .ladder { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  :root { --side-w: 0px; }
  .app { grid-template-columns: minmax(0, 1fr); }
  .sidebar { position: sticky; top: 0; height: auto; z-index: 40; padding: 10px max(16px, env(safe-area-inset-left, 0px)) 10px; padding-right: max(16px, env(safe-area-inset-right, 0px)); border-right: 0; border-bottom: 1px solid var(--line-soft); }
  .menu-toggle { display: grid; place-items: center; }
  .nav { display: none; max-height: calc(100vh - 80px); overflow-y: auto; padding-bottom: 10px; }
  body.nav-open .nav { display: flex; }
  .brand-mark { width: 34px; height: 34px; }
  .dash-hero { grid-template-columns: minmax(0, 1fr); }
  .dash-section.two { grid-template-columns: minmax(0, 1fr); }
  .two-col { grid-template-columns: minmax(0, 1fr); }
  .work-layout { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 560px) {
  body { font-size: 15px; }
  .stat-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat-goal { grid-column: span 2; }
  .rank-panel { flex-direction: column; align-items: flex-start; }
  .glossary > div, .glossary.compact > div { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .coach-body > div { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .term-screen { min-height: 300px; max-height: 55vh; }
  .ladder { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .checklist li { grid-template-columns: 26px minmax(0, 1fr); }
  .ci-detail { grid-column: 2; }
  .reading-nav .btn { flex: 1 1 auto; }
}

/* =====================================================================
   Phase 3 additions: pager, grep colors, breakdowns, handbook, answers
   ===================================================================== */
/* grep output colors (like Ubuntu's grep --color=auto) */
.c-g-file { color: #e77dff; }
.c-g-sep { color: var(--cyan); }
.c-g-num { color: #4dffb8; }
.c-g-match { color: #ff5c7a; font-weight: 700; }

/* pager (man / less) */
.pager { display: flex; flex-direction: column; background: var(--term-bg); font-family: var(--font-mono); font-size: var(--term-font); line-height: 1.5; color: #dcdcf0; outline: none; }
.pager:focus-visible { box-shadow: inset 0 0 0 2px var(--cyan); }
.pager-body { padding: 12px 16px 4px; height: var(--term-min, 360px); min-height: 260px; max-height: 62vh; overflow-x: auto; overflow-y: hidden; }
.pg-line { white-space: pre; min-height: 1.5em; width: max-content; min-width: 100%; }
.pg-tilde { color: #4a4672; }
.pg-hl { background: var(--warn); color: #120f26; border-radius: 2px; }
.pager-status { padding: 2px 16px; min-height: 1.6em; white-space: pre; overflow: hidden; color: #dcdcf0; }
.pager-status.pg-inverse { background: #dcdcf0; color: #07060f; font-weight: 600; }
.pager-tools { display: flex; flex-wrap: wrap; gap: 6px; padding: 8px 12px; border-top: 1px solid var(--line-soft); background: #0a0918; }
.pg-btn { font: inherit; font-family: var(--font-display); font-size: .78rem; font-weight: 600; color: var(--text); background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; padding: 5px 10px; cursor: pointer; min-height: 32px; }
.pg-btn:hover { border-color: var(--cyan); }

/* example breakdown chips */
.breakdown { list-style: none !important; padding: 0 !important; margin: 2px 0 6px; display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 6px; }
.breakdown li { display: flex; flex-direction: column; gap: 2px; padding: 8px 10px; border-radius: 9px; background: rgba(180, 77, 255, .07); border: 1px solid rgba(180, 77, 255, .3); font-size: .86rem; color: var(--muted); }
.breakdown li code { align-self: flex-start; white-space: pre-wrap; }

/* fading drills, hints, expert missions, answers */
.linkish { font: inherit; color: var(--cyan); background: none; border: 0; padding: 0; text-decoration: underline; cursor: pointer; }
.hint-line { padding: 10px 12px; border-radius: 10px; background: rgba(180, 77, 255, .08); border: 1px solid rgba(180, 77, 255, .35); font-size: .94rem; }
.expert-tag { align-self: center; color: var(--pink); }
.answer-box { padding: 12px 14px; border-radius: 12px; border: 1px dashed rgba(34, 229, 255, .45); background: rgba(34, 229, 255, .04); display: flex; flex-direction: column; gap: 6px; }
.answer-box .field-label { margin: 0; color: var(--text); }
.answer-row { display: flex; gap: 8px; flex-wrap: wrap; }
.answer-row .text-input { flex: 1 1 160px; min-width: 0; }
.task-text pre.code { margin: 8px 0; }
div.task-text { display: block; }

/* command handbook */
.hb-tools { display: flex; flex-direction: column; gap: 10px; margin-bottom: 14px; }
.hb-search { font-size: 1rem; }
.hb-filters { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font: inherit; font-size: .82rem; padding: 4px 12px; border-radius: 99px; border: 1px solid var(--line); background: transparent; color: var(--muted); cursor: pointer; }
.chip.on { color: var(--cyan); border-color: rgba(34, 229, 255, .55); background: rgba(34, 229, 255, .08); }
.hb-list { display: flex; flex-direction: column; gap: 10px; }
.hb-entry { border: 1px solid var(--line-soft); border-radius: 12px; background: var(--panel); }
.hb-entry[open] { border-color: rgba(34, 229, 255, .4); }
.hb-entry summary { display: flex; align-items: center; gap: 14px; padding: 12px 14px; cursor: pointer; list-style: none; }
.hb-entry summary::-webkit-details-marker { display: none; }
.hb-name { font-size: 1.1rem; font-weight: 600; color: var(--cyan); min-width: 5.5ch; }
.hb-sum { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.hb-full { font-family: var(--font-display); color: var(--pink); font-size: .85rem; }
.hb-plain { font-size: .92rem; }
.hb-body { padding: 0 16px 16px; max-width: none; }
.hb-body h4 { margin: 8px 0 0; font-family: var(--font-display); color: var(--cyan); font-size: .95rem; }
.hb-drawer-wrap { position: fixed; inset: 0; z-index: 70; }
.hb-scrim { position: absolute; inset: 0; background: rgba(4, 3, 10, .6); }
.hb-drawer { position: absolute; top: 0; right: 0; bottom: 0; width: min(640px, 100%); background: var(--bg-2); border-left: 1px solid rgba(34, 229, 255, .4); box-shadow: -20px 0 50px rgba(0, 0, 0, .5); display: flex; flex-direction: column; padding-top: env(safe-area-inset-top, 0px); }
.hb-drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 14px 18px; border-bottom: 1px solid var(--line-soft); }
.hb-drawer-body { padding: 16px 18px; overflow-y: auto; flex: 1; }
@media (max-width: 560px) { .hb-entry summary { flex-wrap: wrap; } .breakdown { grid-template-columns: minmax(0, 1fr); } }

/* Phase 4: password prompts show nothing while you type, like a real terminal */
.term-input[type="password"] { color: transparent; text-shadow: none; letter-spacing: 0; }

/* Phase 4: permission string breakdown + numeric value boxes */
.perm-break { display: flex; flex-wrap: wrap; gap: 10px; }
.perm-break > div { flex: 1 1 130px; display: flex; flex-direction: column; gap: 2px; padding: 12px 14px; border-radius: 10px; background: var(--term-bg); border: 1px solid var(--line); border-top-width: 3px; }
.perm-break code { font-size: 1.45rem; font-weight: 600; background: none !important; border: none !important; padding: 0 !important; color: var(--muted) !important; }
.perm-break span { font-family: var(--font-display); font-weight: 600; }
.perm-break small { color: var(--muted); font-size: .84rem; }
.perm-break .pb-u { border-top-color: #4dffb8; } .perm-break .pb-u code { color: #4dffb8 !important; }
.perm-break .pb-g { border-top-color: var(--cyan); } .perm-break .pb-g code { color: var(--cyan) !important; }
.perm-break .pb-o { border-top-color: var(--pink); } .perm-break .pb-o code { color: var(--pink) !important; }
.perm-num { display: flex; flex-wrap: wrap; gap: 10px; }
.perm-num > div { padding: 10px 18px; border-radius: 10px; background: var(--term-bg); border: 1px solid var(--line); font-size: 1.1rem; }
.perm-num strong { color: var(--cyan); font-family: var(--font-display); font-size: 1.3rem; }
.data-table td code { white-space: nowrap; overflow-wrap: normal; }

/* ---------- Command Breakdown (Phase 5) ---------- */
.bd-row { display: flex; gap: 8px; flex-wrap: wrap; }
.bd-row .text-input { flex: 1 1 260px; min-width: 0; }
.mono { font-family: var(--font-mono); }
.bd-form .linkish code { font-size: .85em; }
.bd-out { margin-top: 14px; }
.bd-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0 14px; }
.bd-chip { display: inline-flex; flex-direction: column; align-items: center; gap: 2px; padding: 6px 10px; border-radius: 8px; border: 1px solid var(--bd-c, var(--cyan)); background: rgba(255, 255, 255, .03); box-shadow: 0 0 10px -4px var(--bd-c, var(--cyan)); max-width: 100%; }
.bd-chip code { color: var(--bd-c, var(--cyan)); font-size: 1.02rem; word-break: break-all; }
.bd-role { font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.bd-tag { display: inline-block; padding: 1px 7px; border-radius: 999px; font-size: .75rem; border: 1px solid var(--bd-c, var(--cyan)); color: var(--bd-c, var(--cyan)); white-space: nowrap; }
.bd-sudo { --bd-c: var(--pink); }
.bd-command { --bd-c: var(--cyan); }
.bd-sub { --bd-c: var(--purple); }
.bd-opt, .bd-val { --bd-c: var(--warn); }
.bd-pkg, .bd-deb { --bd-c: var(--ok); }
.bd-path, .bd-src, .bd-dest { --bd-c: #7fb7ff; }
.bd-pattern, .bd-mode, .bd-user, .bd-text, .bd-arg { --bd-c: #ff9a5c; }
.bd-table td:nth-child(3) { min-width: 200px; }
.bd-steps li, .bd-notes li { margin: 4px 0; }
@media (max-width: 560px) { .bd-table td:nth-child(3) { min-width: 0; } }

/* ---------- Site notices (hosted version: updates, storage warnings) ---------- */
.site-notice { position: fixed; left: 50%; bottom: 16px; transform: translateX(-50%); z-index: 90; width: min(640px, calc(100% - 32px)); background: var(--panel-2); border: 1px solid var(--cyan); border-radius: var(--radius-sm); box-shadow: var(--glow-cyan); padding: 12px 14px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; color: var(--text); }
.site-notice.warn { border-color: var(--warn); box-shadow: 0 0 0 1px rgba(255, 200, 87, .4), 0 0 22px rgba(255, 200, 87, .18); }
.site-notice strong { flex: 1 1 100%; }