/* ── Tokens ─────────────────────────────────────────────── */
:root {
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --dur-fast: 160ms;
  --dur: 280ms;
  --ease: cubic-bezier(0.65, 0, 0.35, 1);
}
[data-theme="dark"] {
  --bg: #0a0d10;
  --bg-2: #0f1316;
  --surface: #13181c;
  --surface-2: #181e22;
  --line: #1f262d;
  --line-2: #2a323a;
  --ink: #e9eef2;
  --ink-2: #c8d0d7;
  --muted: #8590a0;
  --muted-2: #5b6573;
  --accent: #7cffb2;
  --accent-2: #4fdc8c;
  --accent-soft: rgba(124, 255, 178, 0.10);
  --info: #7caaff;
  --warn: #ffc26b;
  --bad: #ff7c8a;
  --shadow: 0 1px 0 rgba(255,255,255,0.02), 0 6px 24px rgba(0,0,0,0.32);
  --code-bg: #0c1115;
}
[data-theme="light"] {
  --bg: #f6f7f8;
  --bg-2: #ffffff;
  --surface: #ffffff;
  --surface-2: #fafbfc;
  --line: #e3e6ea;
  --line-2: #d2d7dd;
  --ink: #0f1417;
  --ink-2: #2a323a;
  --muted: #6b7280;
  --muted-2: #9ca3af;
  --accent: #0e9966;
  --accent-2: #047a4f;
  --accent-soft: rgba(14, 153, 102, 0.08);
  --info: #2453d8;
  --warn: #b87320;
  --bad: #c42d3e;
  --shadow: 0 1px 0 rgba(0,0,0,0.02), 0 4px 16px rgba(15,20,23,0.06);
  --code-bg: #f1f3f5;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}
button { font-family: inherit; cursor: pointer; }
a { color: var(--accent); text-decoration: none; border-bottom: 1px solid transparent; }
a:hover { border-bottom-color: var(--accent); }
code, kbd { font-family: var(--mono); font-size: 0.9em; }
code { background: var(--code-bg); padding: 1px 5px; border-radius: 3px; }
::selection { background: var(--accent-soft); color: var(--accent); }

/* ── Topbar ─────────────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.85rem 1.6rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  background: none;
  border: none;
  color: var(--ink);
  font-family: var(--mono);
  padding: 0;
}
.brand-glyph { color: var(--accent); font-size: 0.9rem; transform: translateY(-1px); }
.brand-text { font-weight: 700; letter-spacing: -0.01em; font-size: 1.05rem; }
.brand-tag { font-size: 0.7rem; color: var(--muted-2); letter-spacing: 0.05em; }
.nav {
  display: flex;
  gap: 0.2rem;
  margin-left: 1.4rem;
}
.nav-link {
  background: none;
  border: none;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.5rem 0.85rem;
  border-radius: 5px;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.nav-link:hover { color: var(--ink); background: var(--surface); }
.nav-link.is-active { color: var(--ink); background: var(--surface); }
.nav-link.is-priority { color: var(--accent); }
.nav-link.is-priority::before { content: "★ "; }
.nav-link.is-priority.is-active { background: var(--accent-soft); }
.topbar-meta {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}
.streak-pill, .xp-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.32rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--ink-2);
  background: var(--surface);
}
.streak-icon { color: var(--warn); transform: translateY(-1px); }
.xp-pill .xp-unit { color: var(--muted); font-weight: 500; margin-left: 1px; }
.icon-btn {
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink-2);
  width: 32px;
  height: 32px;
  border-radius: 5px;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--dur-fast), color var(--dur-fast);
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); }

/* ── Stage ──────────────────────────────────────────────── */
.stage {
  flex: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.6rem 4rem;
}
.view {
  opacity: 0;
  transform: translateY(6px);
  animation: view-in 360ms var(--ease) forwards;
}
@keyframes view-in {
  to { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  .view { animation: none; opacity: 1; transform: none; }
}

/* ── Page heads ─────────────────────────────────────────── */
.page-head { margin-bottom: 2.4rem; max-width: 760px; }
.page-eyebrow {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.5rem;
  text-transform: lowercase;
}
.page-eyebrow.accent { color: var(--accent); }
.page-title {
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.6rem;
  line-height: 1.1;
}
.page-sub {
  color: var(--muted);
  margin: 0;
  max-width: 60ch;
  font-size: 1rem;
}
.accent { color: var(--accent); }

/* ── Buttons ────────────────────────────────────────────── */
.btn-primary {
  background: var(--accent);
  color: #06180e;
  border: none;
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 0.7rem 1.15rem;
  border-radius: 6px;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 50%, transparent);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 14px color-mix(in srgb, var(--accent) 35%, transparent); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-ghost {
  background: none;
  border: 1px solid transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.82rem;
  padding: 0.5rem 0.8rem;
  border-radius: 5px;
  transition: color var(--dur-fast), border-color var(--dur-fast);
}
.btn-ghost:hover { color: var(--accent); border-color: var(--line-2); }
.btn-danger {
  background: transparent;
  color: var(--bad);
  border: 1px solid color-mix(in srgb, var(--bad) 50%, transparent);
  font-family: var(--mono);
  font-size: 0.82rem;
  padding: 0.55rem 0.9rem;
  border-radius: 5px;
  transition: background var(--dur-fast);
}
.btn-danger:hover { background: color-mix(in srgb, var(--bad) 15%, transparent); }

/* ── Key gate ───────────────────────────────────────────── */
.view-keygate { display: flex; align-items: center; min-height: 70vh; }
.keygate { width: 100%; max-width: 720px; margin: 0 auto; }
.keygate-eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 1rem;
  letter-spacing: 0.08em;
}
.keygate-title {
  font-size: clamp(2.3rem, 5vw, 3.1rem);
  letter-spacing: -0.025em;
  margin: 0 0 1rem;
  line-height: 1.05;
  font-weight: 700;
}
.keygate-sub {
  color: var(--ink-2);
  font-size: 1.05rem;
  line-height: 1.6;
  margin: 0 0 2.2rem;
  max-width: 60ch;
}
.muted-note { color: var(--muted); display: block; margin-top: 0.5rem; font-size: 0.92rem; }
.keygate-input {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: 8px;
  padding: 0.4rem 0.55rem 0.4rem 0.9rem;
  margin-bottom: 0.9rem;
  transition: border-color var(--dur-fast);
}
.keygate-input:focus-within { border-color: var(--accent); }
.keygate-prompt {
  font-family: var(--mono);
  color: var(--accent);
  font-weight: 600;
}
.keygate-input input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--ink);
  outline: none;
  font-family: var(--mono);
  font-size: 0.95rem;
  padding: 0.7rem 0;
}
.kg-go {
  background: var(--accent);
  color: #06180e;
  border: none;
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.65rem 1.1rem;
  border-radius: 5px;
}
.kg-go:hover { transform: translateY(-1px); }
.keygate-hint { color: var(--muted); font-size: 0.88rem; margin: 0 0 2.6rem; }
.keygate-hint code { color: var(--accent); }
.keygate-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.9rem;
}
.kg-card {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 8px;
  padding: 1.1rem;
}
.kg-card-icon {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 1.1rem;
  margin-bottom: 0.4rem;
}
.kg-card-title { font-weight: 600; margin-bottom: 0.3rem; font-size: 0.95rem; }
.kg-card-text { color: var(--muted); font-size: 0.88rem; line-height: 1.5; margin: 0; }

/* ── Dashboard ──────────────────────────────────────────── */
.hello { margin-bottom: 2.4rem; max-width: 760px; }
.hello-eyebrow {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.hello-title {
  font-size: clamp(1.9rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
  line-height: 1.1;
}
.hello-sub { color: var(--muted); margin: 0; }

.dash-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.2rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.5rem;
  transition: border-color var(--dur-fast), transform var(--dur-fast);
  position: relative;
  overflow: hidden;
}
.card:hover { border-color: var(--line-2); }
.card.is-priority { border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); }
.card.is-priority::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.card-eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.6rem;
  text-transform: lowercase;
}
.card-eyebrow.accent { color: var(--accent); }
.card-title {
  font-size: 1.3rem;
  margin: 0 0 0.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
}
.card-sub { font-size: 1.05rem; margin: 0 0 0.7rem; font-weight: 600; }
.card-text { color: var(--muted); margin: 0 0 1.1rem; font-size: 0.92rem; }
.card-meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 1rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.card-next { grid-column: span 8; }
.card-streak { grid-column: span 4; display: flex; flex-direction: column; align-items: center; }
.card-goal { grid-column: span 4; }
.card-portfolio { grid-column: span 8; }
.card-weak { grid-column: span 5; }
.card-tracks { grid-column: span 7; }

/* Streak ring */
.streak-ring { position: relative; width: 140px; height: 140px; margin: 0.4rem 0 1rem; }
.ring-svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: var(--line); stroke-width: 8; }
.ring-fill {
  fill: none;
  stroke: var(--accent);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 326.7;
  stroke-dashoffset: 326.7;
  transition: stroke-dashoffset 800ms var(--ease);
}
.ring-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.ring-num { font-size: 2.2rem; font-weight: 700; line-height: 1; letter-spacing: -0.02em; }
.ring-unit { color: var(--muted); font-family: var(--mono); font-size: 0.7rem; margin-top: 0.25rem; letter-spacing: 0.06em; }

/* Daily goal */
.goal-row { display: flex; align-items: baseline; gap: 0.3rem; margin-bottom: 0.5rem; }
.goal-num { font-size: 2.4rem; font-weight: 700; letter-spacing: -0.02em; line-height: 1; }
.goal-divider { color: var(--muted-2); font-family: var(--mono); }
.goal-target { font-family: var(--mono); color: var(--muted); }
.goal-unit { font-family: var(--mono); color: var(--muted); font-size: 0.85rem; margin-left: 0.3rem; }

/* Bars */
.bar { height: 6px; background: var(--line); border-radius: 100px; overflow: hidden; }
.bar-thin { height: 4px; }
.bar-fill { display: block; height: 100%; background: var(--accent); width: 0%; transition: width 600ms var(--ease); border-radius: 100px; }

/* Weak skills */
.weak-list { list-style: none; margin: 0 0 1rem; padding: 0; display: flex; flex-direction: column; gap: 0.5rem; }
.weak-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface-2);
}
.weak-list li::before { content: "▿"; color: var(--warn); }
.weak-empty { color: var(--muted); font-style: italic; }
.weak-empty::before { content: "✓" !important; color: var(--accent) !important; }

/* Tracks grid */
.tracks-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.6rem; }
.track-chip {
  text-align: left;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.7rem 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  transition: border-color var(--dur-fast);
  color: inherit;
}
.track-chip:hover { border-color: var(--accent); }
.track-chip-name { font-family: var(--mono); font-size: 0.85rem; font-weight: 600; }
.track-chip-meta { color: var(--muted); font-size: 0.78rem; }

/* ── Roadmap ────────────────────────────────────────────── */
.roadmap { display: flex; flex-direction: column; gap: 2.4rem; margin-bottom: 2rem; }
.track {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  padding: 1.5rem;
}
.track-head { display: flex; align-items: baseline; gap: 0.8rem; margin-bottom: 1rem; flex-wrap: wrap; }
.track-glyph {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 0.95rem;
}
.track-title { font-size: 1.15rem; font-weight: 700; margin: 0; letter-spacing: -0.005em; }
.track-tier {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.18rem 0.5rem;
  border-radius: 3px;
  background: var(--surface-2);
  color: var(--muted);
  border: 1px solid var(--line);
}
.track-tier[data-tier="now"] { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.track-tier[data-tier="year"] { color: var(--info); border-color: color-mix(in srgb, var(--info) 35%, var(--line)); }
.track-blurb { color: var(--muted); margin: 0 0 1.2rem; font-size: 0.92rem; max-width: 70ch; }
.nodes {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.7rem;
}
.node {
  text-align: left;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.75rem 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  cursor: pointer;
  transition: border-color var(--dur-fast), transform var(--dur-fast);
  color: inherit;
  position: relative;
}
.node:hover:not([data-state="locked"]) { border-color: var(--accent); transform: translateY(-1px); }
.node-name { font-family: var(--mono); font-size: 0.82rem; font-weight: 600; line-height: 1.3; }
.node-meta { color: var(--muted); font-size: 0.74rem; font-family: var(--mono); display: flex; gap: 0.5rem; align-items: center; }
.node-dot {
  width: 7px; height: 7px; border-radius: 100px; display: inline-block;
}
.node[data-state="locked"] { opacity: 0.5; cursor: not-allowed; }
.node[data-state="locked"] .node-dot, .dot.dot-locked { background: var(--muted-2); }
.node[data-state="open"] .node-dot, .dot.dot-open { background: var(--accent); }
.node[data-state="done"] .node-dot, .dot.dot-done { background: var(--info); }
.node[data-state="done"] { border-color: color-mix(in srgb, var(--info) 30%, var(--line)); }
.node[data-state="done"] .node-name::before { content: "✓ "; color: var(--info); }
.node[data-mission="true"] .node-dot, .dot.dot-mission { background: var(--warn); }
.node[data-mission="true"] .node-name::before { content: "▲ "; color: var(--warn); }

.legend {
  display: flex;
  gap: 1.4rem;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
  padding: 1rem 0;
}
.legend-item { display: inline-flex; gap: 0.4rem; align-items: center; }
.dot { width: 8px; height: 8px; border-radius: 100px; display: inline-block; }

/* ── Lesson view ────────────────────────────────────────── */
.view-lesson { max-width: 780px; margin: 0 auto; }
.lesson-head {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.6rem;
  flex-wrap: wrap;
}
.lesson-back {
  background: none;
  border: none;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.82rem;
  padding: 0.3rem 0;
}
.lesson-back:hover { color: var(--accent); }
.lesson-meta { display: flex; gap: 0.5rem; }
.lesson-track, .lesson-xp {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.22rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--muted);
}
.lesson-xp { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.lesson-progress {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex: 1;
  max-width: 280px;
  min-width: 180px;
}
.lesson-step-label {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--muted);
  white-space: nowrap;
}
.lesson-progress .bar { flex: 1; }
.lesson-body { margin-bottom: 2rem; }
.lesson-title { font-size: 1.7rem; font-weight: 700; letter-spacing: -0.015em; margin: 0 0 0.5rem; line-height: 1.2; }
.lesson-sub { color: var(--muted); margin: 0 0 1.6rem; max-width: 60ch; }

/* Step base */
.step { animation: step-in 320ms var(--ease); }
@keyframes step-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.step-prompt { font-size: 1.05rem; line-height: 1.6; margin: 0 0 1.2rem; }
.step-prompt code { background: var(--code-bg); color: var(--accent); }
.step-meta { color: var(--muted); font-size: 0.85rem; margin: -0.6rem 0 0.8rem; }

/* Multiple choice */
.step-options { display: flex; flex-direction: column; gap: 0.5rem; }
.opt {
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 0.85rem 1rem;
  border-radius: 6px;
  transition: border-color var(--dur-fast), background var(--dur-fast), transform var(--dur-fast);
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
}
.opt:hover { border-color: var(--line-2); background: var(--surface-2); transform: translateX(2px); }
.opt-key {
  font-family: var(--mono);
  color: var(--muted);
  font-size: 0.78rem;
  flex-shrink: 0;
  width: 1.1em;
}
.opt.is-selected { border-color: var(--accent); background: var(--accent-soft); color: var(--ink); }
.opt.is-correct { border-color: var(--accent); background: var(--accent-soft); }
.opt.is-correct .opt-key { color: var(--accent); }
.opt.is-wrong { border-color: var(--bad); background: color-mix(in srgb, var(--bad) 8%, transparent); }
.opt.is-wrong .opt-key { color: var(--bad); }
.opt:disabled { cursor: default; }

/* Short answer */
.step-input {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--line-2);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 1rem;
  padding: 0.85rem 1rem;
  border-radius: 6px;
  outline: none;
  transition: border-color var(--dur-fast);
}
.step-input:focus { border-color: var(--accent); }
.step-input.is-correct { border-color: var(--accent); }
.step-input.is-wrong { border-color: var(--bad); animation: shake 350ms var(--ease); }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-3px); }
  75% { transform: translateX(3px); }
}

/* Code shell */
.code-shell {
  border: 1px solid var(--line-2);
  border-radius: 8px;
  overflow: hidden;
  background: var(--code-bg);
}
.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.45rem 0.85rem;
  background: var(--surface-2);
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}
.code-status { color: var(--muted); }
.code-status[data-state="pass"] { color: var(--accent); }
.code-status[data-state="fail"] { color: var(--bad); }
.code-area {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.92rem;
  line-height: 1.5;
  padding: 1rem;
  min-height: 180px;
  resize: vertical;
  outline: none;
  white-space: pre;
  tab-size: 2;
}
.code-output {
  font-family: var(--mono);
  font-size: 0.82rem;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.7rem 0.85rem;
  margin-top: 0.7rem;
  white-space: pre-wrap;
  color: var(--ink-2);
}
.code-output.is-pass { border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); color: var(--accent); }
.code-output.is-fail { border-color: color-mix(in srgb, var(--bad) 40%, var(--line)); color: var(--bad); }

/* Order list */
.order-list { list-style: none; padding: 0; margin: 0 0 0.8rem; display: flex; flex-direction: column; gap: 0.45rem; }
.order-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.7rem 0.85rem;
  font-family: var(--mono);
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  cursor: grab;
  user-select: none;
  transition: border-color var(--dur-fast), background var(--dur-fast);
}
.order-item:hover { border-color: var(--line-2); background: var(--surface-2); }
.order-item.is-drag { opacity: 0.5; }
.order-item.is-over { border-color: var(--accent); }
.order-item .order-handle { color: var(--muted); }
.order-item .order-num {
  font-family: var(--mono);
  color: var(--muted);
  font-size: 0.75rem;
  width: 1.6em;
}

/* Project step */
.project-checklist { list-style: none; padding: 0; margin: 0 0 1rem; display: flex; flex-direction: column; gap: 0.45rem; }
.proj-item {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.7rem 0.85rem;
  cursor: pointer;
  transition: border-color var(--dur-fast);
}
.proj-item:hover { border-color: var(--line-2); }
.proj-item input[type="checkbox"] {
  margin-top: 0.15rem;
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
.proj-item-text { font-size: 0.95rem; line-height: 1.5; }
.proj-item.is-done .proj-item-text { color: var(--muted); text-decoration: line-through; }
.project-notes {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--line);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 0.85rem;
  border-radius: 6px;
  outline: none;
  min-height: 90px;
  resize: vertical;
}
.project-notes:focus { border-color: var(--accent); }

/* Lesson foot */
.lesson-foot {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}
.lesson-foot-spacer { flex: 1; }

/* Hint balloon */
.hint {
  background: var(--surface);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--line));
  border-radius: 8px;
  padding: 1rem 1.1rem;
  margin-top: 1.1rem;
  animation: step-in 280ms var(--ease);
}
.hint-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.4rem;
}
.hint-tag {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--accent);
  letter-spacing: 0.06em;
}
.hint-meta { font-family: var(--mono); font-size: 0.7rem; color: var(--muted); }
.hint-body { font-size: 0.93rem; color: var(--ink-2); line-height: 1.6; }
.hint-body code { color: var(--accent); }
.hint-body em { color: var(--accent); font-style: normal; font-weight: 500; }
.hint-loading {
  display: inline-block;
  font-family: var(--mono);
  color: var(--muted);
}
.hint-loading::after {
  content: "▮";
  animation: blink 0.9s steps(2) infinite;
  color: var(--accent);
}
@keyframes blink { 50% { opacity: 0; } }

/* ── Portfolio track ────────────────────────────────────── */
.portfolio-meta {
  display: grid;
  grid-template-columns: repeat(3, auto) 1fr;
  gap: 1.5rem;
  align-items: center;
  padding: 1rem 1.4rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-bottom: 2rem;
}
.pf-stat { display: flex; flex-direction: column; gap: 0.2rem; }
.pf-stat-num { font-size: 1.6rem; font-weight: 700; line-height: 1; letter-spacing: -0.01em; }
.pf-stat-label { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); letter-spacing: 0.06em; }
.pf-stat-fill { padding: 0.5rem 0; }

.pf-steps { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.7rem; }
.pf-step {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.1rem 1.3rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  transition: border-color var(--dur-fast);
}
.pf-step:hover { border-color: var(--line-2); }
.pf-step[data-state="done"] { border-color: color-mix(in srgb, var(--info) 35%, var(--line)); }
.pf-step[data-state="locked"] { opacity: 0.55; }
.pf-num {
  font-family: var(--mono);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: -0.01em;
  width: 2.5rem;
}
.pf-step[data-state="done"] .pf-num { color: var(--info); }
.pf-step[data-state="open"] .pf-num { color: var(--accent); }
.pf-mid { display: flex; flex-direction: column; gap: 0.25rem; }
.pf-name { font-size: 1.05rem; font-weight: 600; letter-spacing: -0.005em; line-height: 1.3; }
.pf-blurb { color: var(--muted); font-size: 0.88rem; line-height: 1.5; }
.pf-foot { display: flex; align-items: center; gap: 0.6rem; }
.pf-xp { font-family: var(--mono); font-size: 0.78rem; color: var(--accent); }
.pf-step[data-state="done"] .pf-xp::before { content: "✓ "; }

/* ── Profile ────────────────────────────────────────────── */
.profile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.prof-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.4rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.prof-num { font-size: 2.2rem; font-weight: 700; line-height: 1; letter-spacing: -0.02em; }
.prof-label { font-family: var(--mono); font-size: 0.78rem; color: var(--muted); letter-spacing: 0.05em; }
.prof-section { margin-bottom: 2.4rem; }
.prof-section-title {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-family: var(--mono);
  font-weight: 600;
  margin: 0 0 0.9rem;
}
.badges { display: flex; flex-wrap: wrap; gap: 0.55rem; }
.badge {
  font-family: var(--mono);
  font-size: 0.82rem;
  background: var(--surface);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--line));
  color: var(--accent);
  padding: 0.4rem 0.7rem;
  border-radius: 5px;
}
.badge-empty { color: var(--muted); border-color: var(--line); }
.prof-tracks { display: flex; flex-direction: column; gap: 0.6rem; }
.prof-track-row {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.85rem 1rem;
  display: grid;
  grid-template-columns: 9rem 1fr auto;
  gap: 1rem;
  align-items: center;
}
.prof-track-name { font-family: var(--mono); font-size: 0.88rem; font-weight: 500; }
.prof-track-num { font-family: var(--mono); font-size: 0.82rem; color: var(--muted); }
.prof-activity { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.4rem; }
.prof-activity li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 0.6rem 0.85rem;
  font-family: var(--mono);
  font-size: 0.84rem;
}
.prof-activity .act-time { color: var(--muted); font-size: 0.78rem; }
.prof-empty { color: var(--muted); font-style: italic; }
.prof-warn { color: var(--muted); font-size: 0.88rem; max-width: 50ch; }

/* ── Lesson done ────────────────────────────────────────── */
.view-done { display: flex; align-items: center; min-height: 60vh; }
.done-card { max-width: 560px; margin: 0 auto; text-align: center; padding: 1rem; }
.done-eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.7rem;
}
.done-title { font-size: 2.4rem; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 0.6rem; }
.done-sub { color: var(--muted); margin: 0 0 1.6rem; }
.done-stats {
  display: inline-flex;
  gap: 2rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem 1.6rem;
  margin: 0 0 1.6rem;
}
.done-stat { display: flex; flex-direction: column; gap: 0.2rem; }
.done-stat-num { font-size: 1.8rem; font-weight: 700; letter-spacing: -0.02em; line-height: 1; }
.done-stat-label { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); letter-spacing: 0.06em; }
.done-coach {
  text-align: left;
  background: var(--surface);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--line));
  border-radius: 8px;
  padding: 1rem 1.2rem;
  margin: 0 0 1.6rem;
}
.done-coach-head {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin-bottom: 0.6rem;
  letter-spacing: 0.04em;
}
.done-coach-body { font-size: 0.95rem; line-height: 1.6; color: var(--ink-2); }
.done-actions { display: flex; justify-content: center; gap: 1rem; }

/* ── Settings dialog ────────────────────────────────────── */
.settings {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line-2);
  border-radius: 10px;
  padding: 0;
  max-width: 480px;
  width: calc(100% - 2rem);
  box-shadow: var(--shadow);
}
.settings::backdrop { background: rgba(10, 13, 16, 0.55); backdrop-filter: blur(4px); }
.settings-form { padding: 1.6rem 1.8rem; }
.settings-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
  letter-spacing: -0.01em;
}
.settings-lede { color: var(--muted); font-size: 0.92rem; margin: 0 0 1.5rem; }
.field { display: block; margin-bottom: 1.1rem; }
.field-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
  margin-bottom: 0.4rem;
}
.field input, .field select {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--line);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.95rem;
  padding: 0.6rem 0.7rem;
  border-radius: 5px;
  outline: none;
  transition: border-color var(--dur-fast);
}
.field input { font-family: var(--mono); }
.field input:focus, .field select:focus { border-color: var(--accent); }
.field-hint { display: block; font-size: 0.78rem; color: var(--muted); margin-top: 0.4rem; line-height: 1.5; }
.field-hint code { color: var(--accent); }
.settings-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}
.settings-actions .spacer { flex: 1; }

/* ── Footer ─────────────────────────────────────────────── */
.foot {
  border-top: 1px solid var(--line);
  background: var(--bg);
}
.foot-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.6rem;
  display: flex;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
}
.foot-spacer { flex: 1; }
.foot a { color: var(--muted); border-bottom-color: var(--line-2); }
.foot a:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 980px) {
  .card-next, .card-portfolio { grid-column: span 12; }
  .card-streak, .card-goal { grid-column: span 6; }
  .card-weak, .card-tracks { grid-column: span 12; }
  .tracks-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .topbar-inner { flex-wrap: wrap; padding: 0.7rem 1rem; }
  .nav { order: 3; flex-basis: 100%; margin: 0.5rem 0 0; overflow-x: auto; }
  .nav-link { white-space: nowrap; }
  .stage { padding: 1.4rem 1rem 3rem; }
  .card-streak, .card-goal { grid-column: span 12; }
  .pf-step { grid-template-columns: auto 1fr; }
  .pf-foot { grid-column: 2; }
  .portfolio-meta { grid-template-columns: repeat(3, 1fr); }
  .pf-stat-fill { grid-column: 1 / -1; }
  .lesson-progress { max-width: 100%; }
}

/* ── App.js / engine.js addendum ──────────────────────────────────────
   Covers selectors emitted by the runtime that the base sheet above
   doesn't already style. */

/* Toast */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--surface);
  border: 1px solid var(--line-2);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.85rem;
  padding: 0.7rem 1rem;
  border-radius: 6px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms var(--ease), transform 220ms var(--ease);
  z-index: 200;
}
.toast.is-on { opacity: 1; transform: translateX(-50%) translateY(0); }

/* MC option (the engine renders .step-option, the base sheet styles .opt) */
.step-option {
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 0.85rem 1rem;
  border-radius: 6px;
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  cursor: pointer;
  transition: border-color var(--dur-fast), background var(--dur-fast), transform var(--dur-fast);
  width: 100%;
}
.step-option:hover { border-color: var(--line-2); background: var(--surface-2); transform: translateX(2px); }
.step-option .opt-letter {
  font-family: var(--mono);
  color: var(--muted);
  font-size: 0.78rem;
  flex-shrink: 0;
  width: 1.1em;
  text-transform: uppercase;
}
.step-option .opt-text { flex: 1; line-height: 1.5; }
.step-option.is-selected { border-color: var(--accent); background: var(--accent-soft); }
.step-option.is-correct  { border-color: var(--accent); background: var(--accent-soft); }
.step-option.is-correct .opt-letter { color: var(--accent); }
.step-option.is-wrong    { border-color: var(--bad); background: color-mix(in srgb, var(--bad) 8%, transparent); }
.step-option.is-wrong .opt-letter   { color: var(--bad); }
.step-option.is-answer   { outline: 1px dashed var(--accent); outline-offset: -3px; }

/* Code output rows */
.out-row {
  display: grid;
  grid-template-columns: 1.2rem 1fr auto;
  gap: 0.7rem;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 0.82rem;
  padding: 0.25rem 0;
  border-bottom: 1px dashed var(--line);
}
.out-row:last-child { border-bottom: none; }
.out-mark { font-weight: 700; }
.out-row.out-pass .out-mark { color: var(--accent); }
.out-row.out-fail .out-mark { color: var(--bad); }
.out-row.out-pass .out-desc { color: var(--ink-2); }
.out-row.out-fail .out-desc { color: var(--ink); }
.out-detail { color: var(--muted); font-size: 0.78rem; text-align: right; }

/* Code status pills (engine writes data-kind) */
.code-status[data-kind="pass"]   { color: var(--accent); }
.code-status[data-kind="fail"]   { color: var(--bad); }
.code-status[data-kind="edited"] { color: var(--muted); }

/* Order list — engine uses .is-dragging / .is-over */
.order-item.is-dragging { opacity: 0.45; }
.order-list.is-correct .order-item { border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.order-list.is-wrong .order-item   { border-color: color-mix(in srgb, var(--bad) 30%, var(--line)); }
.order-grip { color: var(--muted); margin-left: auto; }
.order-text { flex: 1; }

/* Project step (engine renders .project-item / .project-row / .project-text) */
.project-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.7rem 0.85rem;
  transition: border-color var(--dur-fast);
}
.project-item:hover { border-color: var(--line-2); }
.project-row { display: flex; align-items: flex-start; gap: 0.7rem; cursor: pointer; }
.project-row input[type="checkbox"] { accent-color: var(--accent); margin-top: 0.2rem; }
.project-text { font-size: 0.94rem; line-height: 1.5; }
.project-checklist.is-correct .project-item { border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }

/* Weak-skills card list */
.weak-list { list-style: none; padding: 0; margin: 0 0 0.9rem; display: flex; flex-direction: column; gap: 0.4rem; }
.weak-empty { color: var(--muted); font-style: italic; font-size: 0.88rem; }
.weak-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.55rem 0.7rem;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 5px;
  font-family: var(--mono);
  font-size: 0.84rem;
  cursor: pointer;
  transition: border-color var(--dur-fast);
}
.weak-item:hover { border-color: var(--accent); }
.weak-track { color: var(--muted); font-size: 0.76rem; }

/* Tracks grid chip layout */
.track-chip {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-align: left;
}
.track-chip .track-glyph { font-size: 1.2rem; color: var(--accent); width: 1.4rem; }
.track-chip .track-meta { display: flex; flex-direction: column; gap: 0.15rem; }
.track-chip .track-name { font-family: var(--mono); font-size: 0.85rem; font-weight: 600; }
.track-chip .track-sub  { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); letter-spacing: 0.04em; }
.track-chip.is-priority { border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); }

/* Roadmap — track sections + nodes */
.roadmap { display: flex; flex-direction: column; gap: 1.6rem; }
.track {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.2rem 1.4rem 0.6rem;
}
.track.is-priority { border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); }
.track-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: start;
  margin-bottom: 0.9rem;
}
.track-head .track-glyph { font-size: 1.6rem; color: var(--accent); line-height: 1; padding-top: 0.15rem; }
.track-head .track-name { font-size: 1.15rem; font-weight: 700; margin: 0 0 0.2rem; letter-spacing: -0.005em; }
.track-head .track-blurb { color: var(--muted); font-size: 0.88rem; line-height: 1.5; margin: 0; max-width: 70ch; }
.track-tier { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.track-badge { font-family: var(--mono); font-size: 0.62rem; color: var(--accent); background: var(--accent-soft); padding: 0.15rem 0.4rem; border-radius: 3px; vertical-align: middle; margin-left: 0.4rem; letter-spacing: 0.06em; }

.nodes { list-style: none; padding: 0; margin: 0 0 0.6rem; display: flex; flex-direction: column; gap: 0.45rem; }
.node {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.8rem;
  align-items: center;
  padding: 0.7rem 0.85rem;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color var(--dur-fast), background var(--dur-fast), transform var(--dur-fast);
}
.node:hover { border-color: var(--line-2); transform: translateX(2px); }
.node.node-locked { cursor: not-allowed; opacity: 0.5; }
.node.node-locked:hover { border-color: var(--line); transform: none; }
.node.node-done { border-color: color-mix(in srgb, var(--info) 30%, var(--line)); }
.node.node-stub { opacity: 0.7; }
.node-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--muted); }
.node-dot.dot-done { background: var(--info); }
.node-dot.dot-open { background: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent); }
.node-dot.dot-locked { background: var(--line-2); }
.node-dot.dot-mission { background: var(--warn); }
.node-body { display: flex; flex-direction: column; gap: 0.15rem; }
.node-name { font-family: var(--mono); font-size: 0.92rem; font-weight: 500; }
.node-meta { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); }
.node-tag { font-family: var(--mono); font-size: 0.62rem; color: var(--muted); border: 1px solid var(--line); padding: 0.05rem 0.35rem; border-radius: 3px; margin-left: 0.4rem; letter-spacing: 0.06em; text-transform: uppercase; }
.node-cta { font-family: var(--mono); color: var(--muted); font-size: 0.95rem; }
.node.node-open .node-cta { color: var(--accent); }
.node.node-done .node-cta { color: var(--info); }

.legend { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--line); }
.legend-item { display: inline-flex; align-items: center; gap: 0.45rem; font-family: var(--mono); font-size: 0.78rem; color: var(--muted); }
.legend-item .dot { width: 10px; height: 10px; border-radius: 50%; }
.legend-item .dot.dot-done { background: var(--info); }
.legend-item .dot.dot-open { background: var(--accent); }
.legend-item .dot.dot-locked { background: var(--line-2); }
.legend-item .dot.dot-mission { background: var(--warn); }

/* Portfolio steps (engine uses .pf-done .pf-open .pf-locked classes) */
.pf-step.pf-done   { border-color: color-mix(in srgb, var(--info) 35%, var(--line)); }
.pf-step.pf-locked { opacity: 0.5; cursor: not-allowed; }
.pf-step.pf-open   { cursor: pointer; }
.pf-step.pf-done   .pf-num { color: var(--info); }
.pf-step.pf-open   .pf-num { color: var(--accent); }
.pf-step .pf-body { display: flex; flex-direction: column; gap: 0.25rem; }
.pf-step .pf-cta  { font-family: var(--mono); color: var(--muted); font-size: 1.05rem; }
.pf-step.pf-open   .pf-cta { color: var(--accent); }
.pf-step.pf-done   .pf-cta { color: var(--info); }
.pf-meta { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); letter-spacing: 0.05em; text-transform: uppercase; }

/* Profile — tracks + activity rows + badges */
.prof-track {
  display: grid;
  grid-template-columns: 12rem 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 0.8rem 1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.prof-track.is-priority { border-color: color-mix(in srgb, var(--accent) 30%, var(--line)); }
.prof-track-meta { font-family: var(--mono); font-size: 0.82rem; color: var(--muted); }

.prof-activity-row {
  display: grid;
  grid-template-columns: 7rem 5rem 1fr auto;
  gap: 0.7rem;
  align-items: baseline;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 0.55rem 0.85rem;
  font-family: var(--mono);
  font-size: 0.82rem;
}
.prof-act-date { color: var(--muted); font-size: 0.76rem; }
.prof-act-kind { color: var(--accent); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.06em; }
.prof-act-xp { color: var(--accent); font-weight: 600; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.7rem;
}
.badge-glyph { color: var(--accent); }
.badge-name  { font-weight: 600; }
.badge-note  { color: var(--muted); font-size: 0.74rem; margin-left: 0.3rem; }

/* Lesson tags + progress */
.lesson-track { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); letter-spacing: 0.06em; }
.lesson-xp    { font-family: var(--mono); font-size: 0.74rem; color: var(--accent); margin-left: 0.5rem; }
.lesson-meta  { display: flex; align-items: baseline; }
.lesson-back  {
  background: transparent; border: 1px solid var(--line); color: var(--muted);
  font-family: var(--mono); font-size: 0.78rem; padding: 0.35rem 0.7rem;
  border-radius: 4px; cursor: pointer; transition: border-color var(--dur-fast), color var(--dur-fast);
}
.lesson-back:hover { border-color: var(--accent); color: var(--accent); }
.lesson-step-label { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); display: block; margin-bottom: 0.25rem; }

/* Step error fallback */
.step-error {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--bad);
  border: 1px solid color-mix(in srgb, var(--bad) 30%, var(--line));
  background: color-mix(in srgb, var(--bad) 6%, transparent);
  padding: 0.7rem 0.85rem;
  border-radius: 6px;
}

/* Lesson done view */
.done-coach {
  margin: 1.4rem auto 0;
  max-width: 460px;
  background: var(--surface);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--line));
  border-radius: 8px;
  padding: 0.9rem 1.1rem;
  text-align: left;
}
.done-coach-head { font-family: var(--mono); font-size: 0.74rem; color: var(--accent); letter-spacing: 0.06em; margin-bottom: 0.4rem; }
.done-coach-body { font-size: 0.9rem; color: var(--ink-2); line-height: 1.55; }
.done-actions { display: flex; gap: 0.6rem; justify-content: center; margin-top: 1.4rem; }

/* Hero / first-run landing */
.hero {
  padding: 1.4rem 0 3rem;
  animation: step-in 380ms var(--ease);
}
.hero-inner { max-width: 980px; margin: 0 auto; display: flex; flex-direction: column; gap: 1.4rem; }
.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
}
.hero-title {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  font-weight: 700;
  margin: 0;
  max-width: 22ch;
}
.hero-sub {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--ink-2);
  max-width: 64ch;
  margin: 0;
}
.hero-sub strong { color: var(--accent); font-weight: 600; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.6rem;
  margin: 0.4rem 0 0.2rem;
}
.hero-stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.hero-stat-num {
  font-family: var(--mono);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--accent);
  line-height: 1;
}
.hero-stat-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0.5rem 0 0.2rem;
  align-items: center;
}
.btn-lg { padding: 0.9rem 1.4rem; font-size: 0.95rem; }
.hero-key {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.85rem 1.1rem;
}
.hero-key summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--mono);
  font-size: 0.85rem;
}
.hero-key summary::-webkit-details-marker { display: none; }
.hero-key-state { color: var(--muted); }
.hero-key[open] .hero-key-state { color: var(--accent); }
.hero-key-action { color: var(--accent); font-size: 0.78rem; letter-spacing: 0.04em; }
.hero-key-body { padding-top: 0.9rem; display: flex; flex-direction: column; gap: 0.6rem; }
.hero-key-text { color: var(--muted); font-size: 0.88rem; line-height: 1.55; margin: 0; max-width: 60ch; }
.hero-tracks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.6rem;
  margin-top: 0.6rem;
}
.hero-tracks .track-chip {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.85rem 1rem;
  cursor: pointer;
  transition: border-color var(--dur-fast), transform var(--dur-fast);
}
.hero-tracks .track-chip:hover { border-color: var(--accent); transform: translateY(-1px); }
.hero-tracks .track-chip.is-priority { border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); }

@media (max-width: 720px) {
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

/* Key prompt modal status line */
.kp-status {
  margin: 0.7rem 0 0;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--muted);
  min-height: 1.1em;
}

/* Settings dialog spacer + danger button */
.btn-danger {
  background: transparent;
  border: 1px solid color-mix(in srgb, var(--bad) 40%, var(--line));
  color: var(--bad);
  font-family: var(--mono);
  font-size: 0.85rem;
  padding: 0.55rem 1rem;
  border-radius: 5px;
  cursor: pointer;
  transition: background var(--dur-fast), border-color var(--dur-fast);
}
.btn-danger:hover { background: color-mix(in srgb, var(--bad) 10%, transparent); }
.spacer { flex: 1; }