/* App styles — layered on the Industry design system (industry.css). */

html, body { margin: 0; background: var(--color-bg); }
a { text-decoration: none; }

/* ── brand mark (nested squares) ───────────────────────────────────── */
.brandmark {
  width: 28px; height: 28px; flex: none; position: relative;
  border: 1px solid var(--color-accent); display: inline-block;
}
.brandmark > span { position: absolute; inset: 5px; border: 1px solid var(--color-accent-400); }

/* ── app header (lesson / login pages) ─────────────────────────────── */
.appbar {
  display: flex; align-items: center; gap: 22px; flex-wrap: wrap;
  padding: 14px 28px; border-bottom: 1px solid var(--color-divider);
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 97%, transparent);
  backdrop-filter: blur(10px) saturate(1.05);
}
.appbar-brand {
  display: flex; align-items: center; gap: 11px; margin-right: auto;
  font-family: var(--font-heading); font-weight: 600; font-size: 17px; color: var(--color-text);
}
.brandmark-sub { color: var(--color-accent); }
.appbar-nav { display: flex; align-items: center; gap: 14px; }
.who { font-family: var(--font-mono); font-size: 12px; color: color-mix(in srgb, var(--color-text) 60%, transparent); }
.appbar-nav form { margin: 0; }

/* ── marketing header (landing) ────────────────────────────────────── */
.mkt-header {
  display: flex; align-items: center; gap: 22px; flex-wrap: wrap;
  padding: 16px 28px; border-bottom: 1px solid var(--color-divider);
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 97%, transparent);
  backdrop-filter: blur(10px) saturate(1.05);
}
.mkt-brand {
  display: flex; align-items: center; gap: 11px; margin-right: auto;
  font-family: var(--font-heading); font-weight: 600; font-size: 17px; color: var(--color-text);
}
.mkt-nav { display: flex; gap: 20px; align-items: center; }
.mkt-nav a { font-size: 14px; color: var(--color-text); }
.mkt-nav a:hover { color: var(--color-accent); }
.mkt-cta { display: flex; gap: 10px; align-items: center; }
.mkt-cta form { margin: 0; }

.btn-lg { padding: 12px 22px; font-size: 15px; }

/* ── hero ──────────────────────────────────────────────────────────── */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--color-divider); }
.hero-grid-bg {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(89,128,166,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(89,128,166,.07) 1px, transparent 1px);
  background-size: 34px 34px;
  animation: gridPan 20s linear infinite;
  -webkit-mask-image: radial-gradient(130% 100% at 72% 34%, #000 38%, transparent 80%);
  mask-image: radial-gradient(130% 100% at 72% 34%, #000 38%, transparent 80%);
}
.hero-inner {
  position: relative; max-width: 1180px; margin: 0 auto; padding: 56px 28px 46px;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 44px; align-items: center;
}
.hero-copy { min-width: 0; }
.eyebrow-chip {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--color-accent-700); border: 1px solid var(--color-divider);
  padding: 5px 11px; margin-bottom: 20px;
}
.pulse-dot { width: 6px; height: 6px; flex: none; background: var(--color-accent); animation: pulseDot 1.6s ease-in-out infinite; }
.pulse-dot.green { background: #7fd6a6; border-radius: 50%; animation-duration: 1.3s; }
.hero-h1 { font-size: 56px; line-height: 1.02; margin: 0 0 20px; text-wrap: balance; }
.hero-lede {
  font-size: 18px; line-height: 1.55; margin: 0 0 28px; max-width: 560px; text-wrap: pretty;
  color: color-mix(in srgb, var(--color-text) 82%, transparent);
}
.chip { font-family: var(--font-mono); font-size: 15px; background: var(--color-neutral-200); padding: 1px 6px; }
.hero-actions { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin-bottom: 26px; }
.hero-proof {
  display: flex; gap: 22px; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 12px; color: var(--color-neutral-700);
}
.reviewer-badge {
  margin: 18px 0 0; display: inline-block; font-family: var(--font-mono); font-size: 11px;
  color: var(--color-accent-800); border: 1px solid var(--color-accent-300);
  background: var(--color-accent-100); padding: 4px 10px;
}

/* ── hero desk panel ───────────────────────────────────────────────── */
.desk { background: var(--color-accent-900); padding: 0; min-width: 0; overflow: hidden; }
.desk-ticks { display: flex; border-bottom: 1px solid var(--color-accent-800); }
.tick { flex: 1; min-width: 0; padding: 7px 10px; border-right: 1px solid var(--color-accent-800); }
.tick:last-child { border-right: 0; }
.tick-sym { font-family: var(--font-mono); font-size: 9px; letter-spacing: .05em; color: #7f9cba; }
.tick-row { display: flex; align-items: baseline; gap: 3px; }
.tick-row [data-val] { font-family: var(--font-mono); font-size: 12px; color: #cfe0f0; }
.tick-row [data-arr] { font-size: 8px; color: #7fd6a6; }
.desk-label {
  display: flex; justify-content: space-between; align-items: center; padding: 9px 14px 2px;
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .04em; color: #9fbdda;
}
.streaming { display: inline-flex; align-items: center; gap: 5px; font-size: 10px; color: #7fd6a6; }
.desk-canvas-wrap { position: relative; aspect-ratio: 2 / 1; width: 100%; padding: 2px 8px 0; overflow: hidden; }
#desk-canvas { display: block; width: 100%; height: 100%; }
.desk-scan {
  position: absolute; left: 8px; right: 8px; top: 0; height: 36%; pointer-events: none;
  background: linear-gradient(180deg, rgba(148,188,227,.14), transparent);
  animation: scanY 3.4s ease-in-out infinite;
}
.desk-axis {
  display: flex; justify-content: space-between; padding: 0 14px 2px;
  font-family: var(--font-mono); font-size: 10px; color: #6f8dab;
}
.desk-console { border-top: 1px solid var(--color-accent-800); padding: 11px 14px 13px; }
#desk-code {
  margin: 0; font-family: var(--font-mono); font-size: 12.5px; line-height: 1.5;
  color: #dfe9f3; white-space: pre-wrap; min-height: 118px;
}

/* ── generic sections ──────────────────────────────────────────────── */
.section { max-width: 1180px; margin: 0 auto; padding: 34px 28px; }
.section-narrow { max-width: 1180px; }
.section-band {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider); border-bottom: 1px solid var(--color-divider);
}
.section-band .section { padding: 52px 28px; }
.section-band-top { border-bottom: 0; }
.section-head-row { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 24px; }
.section-head-row h2 { margin: 0; font-size: 32px; }
.section-head-note { margin: 0; font-size: 14px; max-width: 420px; text-wrap: pretty; }
.eyebrow { font-size: 10.5px; letter-spacing: .15em; text-transform: uppercase; color: var(--color-accent-700); margin-bottom: 8px; }

/* ── path ──────────────────────────────────────────────────────────── */
.path-row {
  list-style: none; margin: 0; padding: 54px 0 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
  column-gap: 14px; row-gap: 54px; align-items: end;
}
.path-node { padding: 14px 15px; transform: translateY(var(--lift, 0)); }
.path-no { font-family: var(--font-mono); font-size: 11px; color: var(--color-accent-700); margin-bottom: 6px; }
.path-title { font-family: var(--font-heading); font-weight: 600; font-size: 17px; line-height: 1.15; }
.path-sub { font-size: 12px; margin-top: 4px; }
.path-node-end .path-title { color: #eaf1f8; }
.path-node-end .path-sub { color: #9fbdda; }

/* ── how it works ──────────────────────────────────────────────────── */
.proof-h2 { margin: 0 0 8px; font-size: 34px; max-width: 640px; text-wrap: balance; }
.proof-lede { margin: 0 0 34px; font-size: 15px; max-width: 560px; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.feature { padding: 18px 18px 20px; background: var(--color-bg); }
.feature-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.feature-step { font-family: var(--font-mono); font-size: 11px; color: var(--color-accent-700); }
.feature h3 { margin: 0 0 7px; font-size: 19px; }
.feature p { margin: 0; font-size: 14px; line-height: 1.5; color: color-mix(in srgb, var(--color-text) 78%, transparent); text-wrap: pretty; }

.ic { width: 20px; height: 20px; flex: none; display: block; fill: none; stroke: var(--color-accent-700); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.ic-lg { width: 24px; height: 24px; stroke: var(--color-accent-800); }

/* ── roles ─────────────────────────────────────────────────────────── */
.roles-h2 { margin: 0 0 6px; font-size: 34px; text-wrap: balance; }
.roles-lede { margin: 0 0 28px; font-size: 15px; max-width: 560px; }
.roles-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.role { padding: 22px 22px 24px; background: var(--color-accent-100); }
.role-head { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.role-head h3 { margin: 0; font-size: 24px; color: var(--color-accent-900); }
.role-blurb { margin: 0 0 16px; font-size: 15px; line-height: 1.5; color: var(--color-accent-900); text-wrap: pretty; }
.role-skills { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 9px; }
.role-skills li { display: flex; gap: 9px; align-items: baseline; font-size: 14px; color: var(--color-accent-900); }
.sq { width: 6px; height: 6px; flex: none; background: var(--color-accent-700); margin-top: 6px; }

/* ── curriculum / module cards ─────────────────────────────────────── */
.curriculum-head { margin-bottom: 26px; }
.curriculum-head h2 { font-size: 34px; }
.module-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; align-items: start; }
.module { padding: 16px 18px; background: transparent; }
.module-open { background: var(--color-accent-100); }
.module-head { display: flex; align-items: center; gap: 13px; margin-bottom: 4px; }
.module-plate {
  display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; flex: none;
  font-family: var(--font-heading); font-weight: 600; font-size: 22px;
  border: 1px solid var(--color-accent); color: var(--color-accent-800);
}
.module-plate.locked { border-color: var(--color-divider); color: var(--color-neutral-600); }
.module-titles { flex: 1; min-width: 0; }
.module-kicker { font-size: 9.5px; letter-spacing: .13em; text-transform: uppercase; color: var(--color-accent-700); }
.module-titles h3 { margin: 0; line-height: 1.1; }
.module-progress { font-family: var(--font-mono); font-size: 11px; color: var(--color-neutral-600); }
.lock { stroke: var(--color-neutral-500); }
.lesson-list { list-style: none; padding: 0; margin: 6px 0 0; }
.lesson-row {
  display: flex; align-items: center; gap: 11px; width: 100%; padding: 11px 6px;
  border-top: 1px solid var(--color-divider); color: var(--color-text);
}
.lesson-row:not(.is-locked):hover { background: color-mix(in srgb, var(--color-text) 4%, transparent); }
.lesson-row.is-locked { opacity: .6; cursor: default; pointer-events: none; }
.lesson-dot { width: 9px; height: 9px; flex: none; border-radius: 50%; display: inline-block; background: var(--color-neutral-400); }
.lesson-dot.open { background: var(--color-accent); }
.lesson-dot.done { background: var(--color-accent-700); }
.lesson-dot.locked { background: var(--color-neutral-300); }
.lesson-name { flex: 1; min-width: 0; font-size: 14.5px; text-wrap: pretty; }
.lesson-meta { font-family: var(--font-mono); font-size: 11.5px; white-space: nowrap; color: var(--color-accent-700); }
.lesson-meta.muted { color: var(--color-neutral-600); }

/* ── final CTA ─────────────────────────────────────────────────────── */
.cta-band { background: var(--color-accent-900); color: #eaf1f8; }
.cta-inner { max-width: 900px; margin: 0 auto; padding: 64px 28px; text-align: center; }
.cta-inner h2 { margin: 0 0 14px; font-size: 42px; color: #fff; text-wrap: balance; }
.cta-inner p { margin: 0 auto 28px; font-size: 17px; line-height: 1.55; color: #c4d5e6; max-width: 560px; text-wrap: pretty; }
.btn-invert { background: var(--color-bg); color: var(--color-accent-900); border-color: var(--color-bg); padding: 13px 26px; font-size: 16px; }
.btn-invert:hover { background: #fff; }

/* ── footers ───────────────────────────────────────────────────────── */
.mkt-footer, .foot {
  max-width: 1180px; margin: 0 auto; padding: 26px 28px;
  display: flex; gap: 16px; flex-wrap: wrap; align-items: center;
  border-top: 1px solid var(--color-divider);
}
.foot-brand { font-family: var(--font-heading); font-weight: 600; font-size: 15px; margin-right: auto; }
.foot-mono { font-family: var(--font-mono); font-size: 12px; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 28px; }

/* ── animation keyframes ───────────────────────────────────────────── */
@keyframes gridPan { from { background-position: 0 0, 0 0; } to { background-position: 34px 34px, 34px 34px; } }
@keyframes pulseDot { 0%, 100% { opacity: 1; } 50% { opacity: .25; } }
@keyframes scanY { from { transform: translateY(-100%); } to { transform: translateY(220%); } }
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* ═══════════════════════════════════════════════════════════════════════
   Lesson page — the four-act experience in Industry style.
   ═══════════════════════════════════════════════════════════════════════ */
.lesson-wrap { max-width: 1180px; margin: 0 auto; padding: 20px 28px 48px; }
.crumbs { font-family: var(--font-mono); font-size: 12px; color: color-mix(in srgb, var(--color-text) 55%, transparent); margin-bottom: 8px; }
.crumbs a { color: var(--color-accent); }
.lesson-title { font-size: 34px; margin: 0 0 16px; display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.donebadge {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .02em;
  color: #2f7d46; border: 1px solid color-mix(in srgb, #2f7d46 45%, transparent);
  background: color-mix(in srgb, #2f7d46 10%, transparent); padding: 2px 9px;
}

/* stage tabs */
.actrail { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.act {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  padding: 7px 13px; border: 1px solid var(--color-divider); background: transparent;
  font-family: var(--font-heading); font-weight: 600; font-size: 14.5px;
  color: color-mix(in srgb, var(--color-text) 55%, transparent);
}
.act:hover { color: var(--color-text); }
.act .act-badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px; flex: none; font-size: 12px; line-height: 1;
  border: 1px solid var(--color-divider); color: inherit;
}
.act .act-badge.ok { border-color: #2f7d46; background: #2f7d46; color: #fff; }
/* line-art lock, not the colour emoji — the rail is a mono/geometric system */
.badge-lock { width: 12px; height: 12px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.act.current { color: var(--color-text); border-color: var(--color-accent); background: var(--color-accent-100); }
.act.current .act-badge { border-color: var(--color-accent); background: var(--color-accent); color: var(--color-bg); }
.act.current .act-badge.ok { border-color: #2f7d46; background: #2f7d46; }

/* single-focus panes: steppers + prev/next */
.stage-intro { font-size: 14px; margin: 0 0 16px; text-wrap: pretty; }
.stepper { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.step {
  width: 30px; height: 30px; flex: none; cursor: pointer;
  border: 1px solid var(--color-divider); background: transparent;
  font-family: var(--font-mono); font-size: 13px; color: var(--color-text);
}
.step:hover { border-color: var(--color-accent); }
.step.answered { border-color: var(--color-accent-500); color: var(--color-accent-700); }
.step.current { border-color: var(--color-accent); background: var(--color-accent); color: var(--color-bg); }
.step.ran, .step.correct { border-color: #2f7d46; color: #2f7d46; }
.step.wrong { border-color: #b23b3b; color: #b23b3b; }
.step.current.ran, .step.current.correct { background: #2f7d46; border-color: #2f7d46; color: #fff; }
.step.current.wrong { background: #b23b3b; border-color: #b23b3b; color: #fff; }
.pane-nav { display: flex; align-items: center; gap: 12px; margin-top: 18px; }
.pane-count { font-family: var(--font-mono); font-size: 12px; color: var(--color-neutral-600); margin: 0 auto; }
.quiz-submitrow { display: flex; align-items: center; gap: 14px; margin-top: 18px; border-top: 1px solid var(--color-divider); padding-top: 16px; }
.example-titlerow { margin-bottom: 12px; }
.ex-kicker, .q-kicker { display: block; font-size: 10px; letter-spacing: .13em; text-transform: uppercase; color: var(--color-accent-700); margin-bottom: 6px; }
.ex-title { font-family: var(--font-heading); font-weight: 600; font-size: 19px; line-height: 1.2; }

/* slide deck */
.deck { margin-bottom: 26px; }
.deck-card { padding: 26px 28px; background: var(--color-bg); min-height: 210px; }
.deck-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.deck-head h2 { margin: 0; font-size: 25px; }
.deck-count { font-family: var(--font-mono); font-size: 12px; color: color-mix(in srgb, var(--color-text) 50%, transparent); }
.lesson-body { font-size: 16px; line-height: 1.62; }
.lesson-body p { margin: 0 0 13px; text-wrap: pretty; }
.lesson-body code, .qtext code, .blurb code { font-family: var(--font-mono); font-size: .92em; background: var(--color-neutral-200); padding: 1px 5px; }
.lesson-body pre, .boardstep pre {
  font-family: var(--font-mono); font-size: 13px; line-height: 1.5;
  background: var(--color-accent-900); color: #dfe9f3; padding: 13px 15px; overflow-x: auto; white-space: pre;
}
.lesson-body table { border-collapse: collapse; font-size: 14px; margin: 4px 0 13px; }
.lesson-body th, .lesson-body td { text-align: left; padding: 6px 12px; border-bottom: 1px solid var(--color-divider); }
.lesson-body th { font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--color-accent-700); }
/* Full card width: diagram boxes and axis labels need the room, and a 600px
   cap inside a 1120px card was what forced labels to ellipsize. */
#slide-canvas { display: block; width: 100%; height: clamp(260px, 34vw, 380px); margin: 14px auto 2px; }
/* `display: block` above outranks the UA [hidden] rule, so a text-only slide
   kept reserving the canvas box — that was the dead space under short slides. */
#slide-canvas[hidden] { display: none; }
.boardstep { font-size: 15px; line-height: 1.5; margin-top: 10px; padding-left: 14px; border-left: 2px solid var(--color-accent-400); }
.boardstep.fresh { border-left-color: var(--color-accent); }
.boardmore { color: var(--color-neutral-500); letter-spacing: .3em; margin-top: 8px; }
.deck-nav { display: flex; align-items: center; justify-content: space-between; margin-top: 16px; }
.deck-dots { display: flex; gap: 7px; }
.deck-dots .dot { width: 8px; height: 8px; padding: 0; border: 1px solid var(--color-neutral-400); background: transparent; cursor: pointer; }
.deck-dots .dot.on { background: var(--color-accent); border-color: var(--color-accent); }
.ghostbtn { color: var(--color-accent); border-color: transparent; }
.ghostbtn:disabled { opacity: .4; }

/* act blocks */
.act-block { margin: 28px 0; }
.act-title { font-size: 25px; margin: 0 0 14px; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }

/* worked examples — dark console plate */
.example { margin-bottom: 20px; }
.editor-head {
  display: flex; align-items: center; gap: 9px; padding: 10px 13px;
  background: var(--color-accent-900); border: 1px solid var(--color-accent-900); border-bottom: 1px solid var(--color-accent-800);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .03em; color: #b9cee1;
}
.editor-head .runhint { color: #6f8dab; margin-left: auto; font-size: 11px; }
.editor-head .btn {
  margin-left: auto; padding: 5px 14px;
  background: var(--color-accent); color: var(--color-bg); border-color: var(--color-accent);
}
.editor-head .btn:hover { background: var(--color-accent-400); }
.editor-head .runhint + .btn { margin-left: 10px; }
.example-code, .example-out {
  margin: 0; padding: 13px 15px; font-family: var(--font-mono); font-size: 13.5px; line-height: 1.6;
  background: var(--color-accent-900); color: #dfe9f3; white-space: pre-wrap; overflow-x: auto;
  border-left: 1px solid var(--color-accent-900); border-right: 1px solid var(--color-accent-900);
}
.example-out { border-top: 1px solid var(--color-accent-800); color: #9fd6a6; border-bottom: 1px solid var(--color-accent-900); }
.example-out.iserr { color: #e59aa0; }
.example-expl { font-size: 14px; line-height: 1.55; margin-top: 12px; color: color-mix(in srgb, var(--color-text) 82%, transparent); }
.example-expl p { margin: 0 0 8px; }

/* quiz */
.quizq { padding: 16px 0; border-top: 1px solid var(--color-divider); }
.quizq:first-child { border-top: 0; }
.qtext { font-size: 16px; font-weight: 500; margin: 0 0 12px; }
.qopt { display: flex; align-items: baseline; gap: 10px; padding: 8px 0; font-size: 14.5px; cursor: pointer; }
.qopt input { position: absolute; opacity: 0; width: 0; height: 0; }
.qopt::before {
  content: ""; width: 16px; height: 16px; flex: none; border-radius: 50%;
  border: 1.5px solid var(--color-divider); margin-top: 2px;
}
.qopt:hover::before { border-color: var(--color-accent); }
.qopt:has(input:checked)::before { border-color: var(--color-accent); background: var(--color-accent); box-shadow: inset 0 0 0 4px var(--color-bg); }
.qwhy { font-size: 13.5px; line-height: 1.5; margin-top: 8px; padding: 10px 13px; border-left: 3px solid; }
.qwhy.good { border-color: #2f7d46; background: color-mix(in srgb, #2f7d46 8%, transparent); }
.qwhy.bad { border-color: #b23b3b; background: color-mix(in srgb, #b23b3b 8%, transparent); }
#quiz-verdict { font-family: var(--font-mono); font-size: 13px; margin-left: 12px; }
#quiz > .btn { margin-top: 8px; }

/* challenge */
.gate {
  padding: 16px 18px; background: var(--color-neutral-100); border: 1px solid var(--color-divider);
  font-size: 15px; color: color-mix(in srgb, var(--color-text) 75%, transparent);
}
.gate-soon { margin: 10px 0 14px; font-size: 14.5px; line-height: 1.55; text-wrap: pretty; }
.blurb { font-size: 14px; line-height: 1.55; margin: 0 0 14px; color: color-mix(in srgb, var(--color-text) 82%, transparent); }
#editor { height: 340px; border: 1px solid var(--color-accent-900); border-top: 0; }
.verdict { margin-top: 14px; border: 1px solid var(--color-divider); padding: 13px 15px; background: var(--color-bg); }
.test { font-family: var(--font-mono); font-size: 13px; padding: 4px 0; display: flex; flex-direction: column; gap: 3px; }
.test.pass { color: #2f7d46; }
.test.fail { color: #b23b3b; }
.test.allpass { color: #2f7d46; font-weight: 600; border-bottom: 1px solid var(--color-divider); padding-bottom: 8px; margin-bottom: 6px; }
.feedback { color: var(--color-text); font-family: var(--font-body); font-size: 13.5px; line-height: 1.5; padding-left: 16px; }
.err { font-family: var(--font-mono); font-size: 12.5px; background: var(--color-accent-900); color: #e59aa0; padding: 11px 13px; overflow-x: auto; white-space: pre-wrap; margin: 8px 0 0; }
.hintbox { margin-top: 10px; padding: 11px 13px; font-size: 13.5px; background: var(--color-accent-100); border-left: 3px solid var(--color-accent); }
#stdout { font-family: var(--font-mono); font-size: 12.5px; background: var(--color-accent-900); color: #dfe9f3; padding: 11px 13px; overflow-x: auto; white-space: pre-wrap; margin: 8px 0 0; }

/* locked tier + pager
   Scoped to the panel: a bare `.locked` also matched `.lesson-dot.locked` and
   `.module-plate.locked`, inflating a 9px bullet into a 46px disc. */
.locked-panel { padding: 22px; border: 1px solid var(--color-divider); background: var(--color-surface); }
.pager { display: flex; justify-content: space-between; margin-top: 30px; padding-top: 18px; border-top: 1px solid var(--color-divider); }
.pager a { font-family: var(--font-heading); font-weight: 600; color: var(--color-accent); }
.btn.big { padding: 11px 20px; font-size: 15px; }

/* login */
.loginwrap { max-width: 480px; margin: 48px auto 0; }
.loginwrap h1 { font-size: 42px; margin: 0 0 8px; }
.login-lede { font-size: 15px; margin: 0 0 22px; }
.loginform { display: flex; gap: 10px; align-items: stretch; }
.loginform .input { flex: 1; }

/* ── hub: course cards ─────────────────────────────────────────────── */
.course-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(288px, 1fr)); gap: 18px; }
.course-card {
  position: relative; display: flex; flex-direction: column; gap: 8px;
  padding: 22px 22px 20px; background: transparent; color: var(--color-text);
  transition: background .12s;
}
.course-card:hover { background: var(--color-accent-100); }
.course-track { font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: var(--color-accent-700); }
.course-title { font-family: var(--font-heading); font-weight: 600; font-size: 24px; line-height: 1.1; margin: 0; }
.course-tagline { font-size: 14px; line-height: 1.5; margin: 0; color: color-mix(in srgb, var(--color-text) 78%, transparent); text-wrap: pretty; flex: 1; }
.course-foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 6px; }
.course-count { font-family: var(--font-mono); font-size: 11.5px; color: var(--color-neutral-600); }
.course-progress { font-family: var(--font-mono); font-size: 11.5px; color: var(--color-accent-700); }
.course-go { font-family: var(--font-heading); font-weight: 600; font-size: 14px; color: var(--color-accent); margin-top: 10px; }
.course-card:hover .course-go { color: var(--color-accent-700); }

/* ── per-course catalog header ─────────────────────────────────────── */
.catalog-head { margin: 6px 0 26px; }
.catalog-title { font-size: 42px; margin: 2px 0 8px; }
.catalog-tagline { font-size: 16px; line-height: 1.5; margin: 0; max-width: 620px; color: color-mix(in srgb, var(--color-text) 78%, transparent); text-wrap: pretty; }
.catalog-grid { margin-top: 6px; }

/* auth pages */
.login-error {
  font-size: 13.5px; color: #b23b3b; margin: 0 0 16px;
  border-left: 3px solid #b23b3b; padding: 8px 12px;
  background: color-mix(in srgb, #b23b3b 8%, transparent);
}
.dev-note {
  margin: 22px 0 0; padding: 12px 14px; font-size: 13px;
  border: 1px dashed var(--color-accent-300); background: var(--color-accent-100);
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}

/* ── admin dashboard ────────────────────────────────────────────────────── */
.admin-config { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 22px; }
.cfg {
  font-family: var(--font-mono); font-size: 11.5px; padding: 4px 10px;
  border: 1px solid var(--color-divider);
}
.cfg-ok { color: #2f7d46; border-color: color-mix(in srgb, #2f7d46 40%, transparent); background: color-mix(in srgb, #2f7d46 7%, transparent); }
.cfg-warn { color: #b23b3b; border-color: color-mix(in srgb, #b23b3b 45%, transparent); background: color-mix(in srgb, #b23b3b 8%, transparent); }

.statgrid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 14px; margin-bottom: 30px;
}
.stat { padding: 16px 16px 14px; background: var(--color-bg); }
.stat-value { font-family: var(--font-heading); font-weight: 600; font-size: 30px; line-height: 1; }
.stat-label {
  font-size: 10px; letter-spacing: .13em; text-transform: uppercase;
  color: var(--color-accent-700); margin-top: 7px;
}

.tablewrap { overflow-x: auto; margin-bottom: 30px; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.admin-table th {
  text-align: left; font-size: 10px; letter-spacing: .11em; text-transform: uppercase;
  color: var(--color-accent-700); padding: 8px 12px; border-bottom: 1px solid var(--color-accent-300);
  white-space: nowrap;
}
.admin-table td { padding: 9px 12px; border-bottom: 1px solid var(--color-divider); }
.admin-table tbody tr:hover { background: color-mix(in srgb, var(--color-text) 3%, transparent); }
.admin-table .num { text-align: right; }
.admin-table .mono { font-family: var(--font-mono); font-size: 12.5px; white-space: nowrap; }
.pill {
  font-family: var(--font-mono); font-size: 10.5px; padding: 2px 8px;
  border: 1px solid var(--color-divider); color: var(--color-neutral-600);
}
.pill-paid { color: var(--color-accent-800); border-color: var(--color-accent-400); background: var(--color-accent-100); }
.pill-pass { color: #2f7d46; border-color: color-mix(in srgb, #2f7d46 40%, transparent); }