/* =========================================================================
 * Ahura Canon — Participant Web styles.
 * Every color, spacing value, and radius is sourced from the brand tokens.
 * Zero hardcoded hex values. If you need a new token, add it upstream.
 * =========================================================================*/

/* ------------------------------------------------------------------ fonts */

@font-face {
  font-family: "Inter";
  src: url("/study/static/fonts/inter-variable.woff2") format("woff2-variations");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Fraunces";
  src: url("/study/static/fonts/fraunces-variable.woff2") format("woff2-variations");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/study/static/fonts/jetbrains-mono.woff2") format("woff2");
  font-weight: 400 500;
  font-style: normal;
  font-display: swap;
}

/* ------------------------------------------------- brand-token fallbacks */
/* The /brand/tokens.css endpoint should provide these at runtime. Keep a
   local mirror so the participant app is viewable without the backend. */

:root {
  --canon-primary: #00B8A9;
  --canon-primary-dark: #008B82;
  --canon-primary-tint: #E6F7F5;
  --canon-ink-900: #0F172A;
  --canon-ink-700: #334155;
  --canon-ink-500: #64748B;
  --canon-ink-200: #E2E8F0;
  --canon-canvas: #F8FAFC;
  --canon-surface: #FFFFFF;
  --canon-gold: #C2914A;
  --canon-success: #059669;
  --canon-warning: #D97706;
  --canon-error: #B91C1C;

  --canon-font-display: "Fraunces", ui-serif, Georgia, serif;
  --canon-font-body: "Inter", ui-sans-serif, system-ui, sans-serif;
  --canon-font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;

  --canon-space-1: 2px;
  --canon-space-2: 4px;
  --canon-space-3: 8px;
  --canon-space-4: 12px;
  --canon-space-5: 16px;
  --canon-space-6: 24px;
  --canon-space-7: 32px;
  --canon-space-8: 48px;
  --canon-space-9: 64px;

  --canon-radius-1: 4px;
  --canon-radius-2: 8px;
  --canon-radius-3: 12px;
  --canon-radius-pill: 9999px;

  --canon-shadow-card: 0 1px 2px rgba(15,23,42,0.04), 0 1px 1px rgba(15,23,42,0.03);
  --canon-shadow-overlay: 0 10px 30px rgba(15,23,42,0.12), 0 3px 8px rgba(15,23,42,0.08);

  /* Layout */
  --canon-measure: 72ch; /* target 65-80 chars */
  --canon-sidebar-width: 264px;
  --canon-rail-width: 320px;
  --canon-focus-ring: 2px solid var(--canon-primary-dark);
}

/* ----------------------------------------------------------- base reset */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; }
[x-cloak] { display: none !important; }

.canon-body {
  background: var(--canon-canvas);
  color: var(--canon-ink-900);
  font-family: var(--canon-font-body);
  font-size: 18px;
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--canon-primary-dark); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--canon-primary); }

:focus-visible {
  outline: var(--canon-focus-ring);
  outline-offset: 2px;
  border-radius: 2px;
}

.canon-visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.canon-skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--canon-ink-900); color: var(--canon-surface);
  padding: var(--canon-space-3) var(--canon-space-5);
  border-radius: var(--canon-radius-2);
}
.canon-skip:focus { left: var(--canon-space-5); top: var(--canon-space-5); z-index: 1000; }

/* ----------------------------------------------------------- header */

.canon-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--canon-space-6);
  padding: var(--canon-space-4) var(--canon-space-7);
  background: var(--canon-surface);
  border-bottom: 1px solid var(--canon-ink-200);
  position: sticky;
  top: 0;
  z-index: 10;
}
.canon-header__brand { display: flex; align-items: center; gap: var(--canon-space-4); }
.canon-header__mark { display: inline-flex; }
.canon-header__title {
  display: flex; align-items: baseline; gap: var(--canon-space-3);
  font-family: var(--canon-font-display);
  font-weight: 500;
}
.canon-header__product { font-size: 20px; letter-spacing: -0.01em; }
.canon-header__divider { color: var(--canon-ink-500); }
.canon-header__vertical {
  font-family: var(--canon-font-body);
  font-weight: 500;
  font-size: 14px;
  color: var(--canon-ink-700);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.canon-header__nav { display: flex; align-items: center; gap: var(--canon-space-6); }
.canon-header__link {
  color: var(--canon-ink-700);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
}
.canon-header__link:hover { color: var(--canon-primary-dark); }
.canon-header__user { font-size: 14px; color: var(--canon-ink-500); }

/* ----------------------------------------------------------- footer */

.canon-footer {
  display: flex; gap: var(--canon-space-3); align-items: center;
  padding: var(--canon-space-5) var(--canon-space-7);
  border-top: 1px solid var(--canon-ink-200);
  color: var(--canon-ink-500);
  font-size: 12px;
  background: var(--canon-surface);
  margin-top: auto;
}

/* ----------------------------------------------------------- shell */

.canon-shell { flex: 1; display: flex; min-height: 0; }

/* ----------------------------------------------------------- landing */

.canon-landing {
  max-width: var(--canon-measure);
  margin: 0 auto;
  padding: var(--canon-space-9) var(--canon-space-7);
  width: 100%;
}
.canon-eyebrow {
  font-family: var(--canon-font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  color: var(--canon-ink-500);
  margin: 0 0 var(--canon-space-3) 0;
}
.canon-display {
  font-family: var(--canon-font-display);
  font-weight: 500;
  font-size: 48px;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 var(--canon-space-5) 0;
}
.canon-lede {
  color: var(--canon-ink-700);
  font-size: 18px;
  margin: 0 0 var(--canon-space-8) 0;
}
.canon-bucket-list {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: var(--canon-space-5);
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}
.canon-bucket-card {
  background: var(--canon-surface);
  border: 1px solid var(--canon-ink-200);
  border-radius: var(--canon-radius-3);
  transition: border-color 120ms ease, transform 120ms ease;
}
.canon-bucket-card:hover { border-color: var(--canon-primary); }
.canon-bucket-card__link {
  display: flex; flex-direction: column; gap: var(--canon-space-3);
  padding: var(--canon-space-6);
  text-decoration: none;
  color: inherit;
}
.canon-bucket-card__tag {
  align-self: flex-start;
  font-family: var(--canon-font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--canon-primary-dark);
  background: var(--canon-primary-tint);
  padding: 2px 10px;
  border-radius: var(--canon-radius-pill);
}
.canon-bucket-card__title {
  font-family: var(--canon-font-display);
  font-weight: 500;
  font-size: 24px;
  line-height: 1.2;
  margin: 0;
}
.canon-bucket-card__desc { color: var(--canon-ink-700); margin: 0; font-size: 16px; }
.canon-bucket-card__meta {
  font-family: var(--canon-font-mono);
  font-size: 12px;
  color: var(--canon-ink-500);
  display: flex; gap: var(--canon-space-3);
}

.canon-empty {
  color: var(--canon-ink-500);
  font-size: 14px;
  padding: var(--canon-space-5) 0;
}
.canon-empty-state { padding: var(--canon-space-9) var(--canon-space-7); max-width: var(--canon-measure); }

/* ----------------------------------------------------------- reader */

.canon-reader {
  display: grid;
  grid-template-columns: var(--canon-sidebar-width) 1fr var(--canon-rail-width);
  grid-template-areas: "sidebar main rail";
  width: 100%;
  min-height: 0;
}
.canon-sidebar {
  grid-area: sidebar;
  border-right: 1px solid var(--canon-ink-200);
  background: var(--canon-surface);
  padding: var(--canon-space-6) var(--canon-space-5);
  overflow-y: auto;
  max-height: calc(100vh - 64px);
  position: sticky;
  top: 64px;
}
.canon-sidebar__header { margin-bottom: var(--canon-space-5); }
.canon-sidebar__eyebrow {
  display: block;
  font-family: var(--canon-font-mono);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--canon-ink-500);
}
.canon-sidebar__title {
  font-family: var(--canon-font-display);
  font-weight: 500;
  font-size: 20px;
  margin: var(--canon-space-1) 0 0 0;
}

/* ----------------------------------------------------------- tree */

.canon-tree__root, .canon-tree__group, .canon-tree__children, .canon-tree__chunks {
  list-style: none; margin: 0; padding: 0;
}
.canon-tree__node { padding: var(--canon-space-2) 0; }
.canon-tree__label {
  display: block;
  font-family: var(--canon-font-body);
  font-weight: 500;
  font-size: 14px;
  color: var(--canon-ink-700);
}
.canon-tree__code {
  font-family: var(--canon-font-mono);
  font-size: 12px;
  color: var(--canon-ink-500);
}
.canon-tree__children { padding-left: var(--canon-space-4); border-left: 1px solid var(--canon-ink-200); margin-left: var(--canon-space-2); }
.canon-tree__chunks { padding-left: var(--canon-space-4); }
.canon-tree__chunk {
  display: block;
  padding: var(--canon-space-2) var(--canon-space-3);
  border-radius: var(--canon-radius-1);
  color: var(--canon-ink-900);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.4;
}
.canon-tree__chunk:hover { background: var(--canon-primary-tint); color: var(--canon-primary-dark); }
.canon-tree__chunk--current {
  background: var(--canon-primary-tint);
  color: var(--canon-primary-dark);
  border-left: 2px solid var(--canon-primary);
  padding-left: calc(var(--canon-space-3) - 2px);
  font-weight: 600;
}

/* ----------------------------------------------------------- main */

.canon-reader__main {
  grid-area: main;
  padding: var(--canon-space-8) var(--canon-space-7);
  max-width: 100%;
  overflow-y: auto;
}

.canon-chunk { max-width: var(--canon-measure); margin: 0 auto; }
.canon-chunk__header { margin-bottom: var(--canon-space-6); }
.canon-chunk__tag {
  display: inline-block;
  font-family: var(--canon-font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--canon-primary-dark);
  background: var(--canon-primary-tint);
  padding: 2px 10px;
  border-radius: var(--canon-radius-pill);
  margin-bottom: var(--canon-space-4);
}
.canon-chunk__heading {
  font-family: var(--canon-font-display);
  font-weight: 500;
  font-size: 32px;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 var(--canon-space-3) 0;
}
.canon-chunk__breadcrumb {
  font-family: var(--canon-font-mono);
  font-size: 12px;
  color: var(--canon-ink-500);
  margin: 0;
  display: flex; gap: var(--canon-space-2); flex-wrap: wrap;
}
.canon-chunk__body p {
  margin: 0 0 var(--canon-space-5) 0;
  color: var(--canon-ink-900);
  font-size: 18px;
  line-height: 1.65;
}
.canon-chunk__citations {
  margin-top: var(--canon-space-7);
  padding-top: var(--canon-space-5);
  border-top: 1px solid var(--canon-ink-200);
  display: flex; gap: var(--canon-space-5); flex-wrap: wrap;
  font-family: var(--canon-font-mono);
  font-size: 12px;
  color: var(--canon-ink-500);
}

/* ----------------------------------------------------------- actions */

.canon-reader__actions {
  max-width: var(--canon-measure);
  margin: var(--canon-space-8) auto 0 auto;
  padding-top: var(--canon-space-5);
  border-top: 1px solid var(--canon-ink-200);
  display: flex; flex-wrap: wrap; gap: var(--canon-space-4);
  justify-content: flex-start;
}

/* ----------------------------------------------------------- buttons */

.canon-button {
  font-family: var(--canon-font-body);
  font-weight: 600;
  font-size: 14px;
  height: 40px;
  padding: 0 var(--canon-space-5);
  border-radius: var(--canon-radius-2);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
  display: inline-flex; align-items: center; gap: var(--canon-space-2);
}
.canon-button:disabled { opacity: 0.5; cursor: not-allowed; }
.canon-button--primary {
  background: var(--canon-primary);
  color: var(--canon-surface);
}
.canon-button--primary:hover:not(:disabled) { background: var(--canon-primary-dark); }
.canon-button--secondary {
  background: var(--canon-surface);
  border-color: var(--canon-ink-200);
  color: var(--canon-ink-900);
}
.canon-button--secondary:hover:not(:disabled) { border-color: var(--canon-primary); color: var(--canon-primary-dark); }
.canon-button--ghost {
  background: transparent;
  color: var(--canon-ink-700);
  border-color: transparent;
}
.canon-button--ghost:hover:not(:disabled) { color: var(--canon-primary-dark); background: var(--canon-primary-tint); }
.canon-button--pill {
  height: 32px; padding: 0 var(--canon-space-4);
  border-radius: var(--canon-radius-pill);
  background: var(--canon-surface);
  border-color: var(--canon-ink-200);
  color: var(--canon-ink-700);
  font-weight: 500;
}
.canon-button--pill.canon-button--active,
.canon-button--pill[aria-pressed="true"] {
  background: var(--canon-primary-tint);
  color: var(--canon-primary-dark);
  border-color: var(--canon-primary);
}

/* ----------------------------------------------------------- right rail */

.canon-right-rail {
  grid-area: rail;
  border-left: 1px solid var(--canon-ink-200);
  background: var(--canon-surface);
  padding: var(--canon-space-6) var(--canon-space-5);
  overflow-y: auto;
  max-height: calc(100vh - 64px);
  position: sticky;
  top: 64px;
}
.canon-right-rail__section + .canon-right-rail__section { margin-top: var(--canon-space-7); }

/* ----------------------------------------------------------- notes */

.canon-notes__header {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: var(--canon-space-3);
}
.canon-notes__title {
  font-family: var(--canon-font-display);
  font-size: 18px; font-weight: 500; margin: 0;
}
.canon-notes__saved {
  font-family: var(--canon-font-mono);
  font-size: 12px;
  color: var(--canon-success);
}
.canon-notes__form { display: flex; flex-direction: column; gap: var(--canon-space-3); }
.canon-notes__input {
  font-family: var(--canon-font-mono);
  font-size: 14px;
  padding: var(--canon-space-3);
  border: 1px solid var(--canon-ink-200);
  border-radius: var(--canon-radius-2);
  background: var(--canon-surface);
  color: var(--canon-ink-900);
  resize: vertical;
}
.canon-notes__input:focus-visible { outline: var(--canon-focus-ring); outline-offset: 1px; border-color: var(--canon-primary); }
.canon-notes__list { list-style: none; padding: 0; margin: var(--canon-space-5) 0 0 0; }
.canon-notes__item {
  border: 1px solid var(--canon-ink-200);
  border-radius: var(--canon-radius-2);
  padding: var(--canon-space-4);
  margin-bottom: var(--canon-space-3);
  background: var(--canon-canvas);
}
.canon-notes__content {
  font-family: var(--canon-font-mono);
  font-size: 13px;
  margin: 0;
  white-space: pre-wrap;
  color: var(--canon-ink-900);
}
.canon-notes__meta {
  margin-top: var(--canon-space-3);
  font-family: var(--canon-font-mono);
  font-size: 11px;
  color: var(--canon-ink-500);
}

/* ----------------------------------------------------------- bookmarks */

.canon-bookmark__header {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: var(--canon-space-3);
}
.canon-bookmark__title { font-family: var(--canon-font-display); font-size: 18px; font-weight: 500; margin: 0; }
.canon-bookmark__current { font-size: 12px; color: var(--canon-ink-500); }
.canon-bookmark__form { display: flex; flex-wrap: wrap; gap: var(--canon-space-2); }

/* ----------------------------------------------------------- tutor drawer */

.canon-tutor {
  position: fixed;
  right: 0; top: 64px; bottom: 0;
  width: 480px; max-width: 100vw;
  background: var(--canon-surface);
  border-left: 1px solid var(--canon-ink-200);
  box-shadow: var(--canon-shadow-overlay);
  z-index: 20;
  display: flex; flex-direction: column;
}
.canon-tutor__panel { display: flex; flex-direction: column; height: 100%; }
.canon-tutor__header {
  padding: var(--canon-space-5) var(--canon-space-6);
  border-bottom: 1px solid var(--canon-ink-200);
}
.canon-tutor__title { font-family: var(--canon-font-display); font-size: 20px; margin: 0 0 var(--canon-space-2) 0; font-weight: 500; }
.canon-tutor__context { margin: 0; color: var(--canon-ink-500); font-size: 13px; }
.canon-tutor__transcript {
  flex: 1;
  list-style: none;
  margin: 0; padding: var(--canon-space-5) var(--canon-space-6);
  overflow-y: auto;
  display: flex; flex-direction: column; gap: var(--canon-space-4);
}
.canon-tutor__msg {
  padding: var(--canon-space-4);
  border-radius: var(--canon-radius-2);
  max-width: 100%;
}
.canon-tutor__msg--system { background: var(--canon-canvas); color: var(--canon-ink-500); font-size: 13px; }
.canon-tutor__msg--user { background: var(--canon-primary-tint); color: var(--canon-ink-900); align-self: flex-end; }
.canon-tutor__msg--tutor { background: var(--canon-surface); border: 1px solid var(--canon-ink-200); }
.canon-tutor__stream { margin: 0; white-space: pre-wrap; }
.canon-tutor__citations { margin-top: var(--canon-space-3); display: flex; flex-wrap: wrap; gap: var(--canon-space-3); font-family: var(--canon-font-mono); font-size: 12px; }
.canon-citation { color: var(--canon-primary-dark); text-decoration: underline; }
.canon-tutor__form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--canon-space-3);
  padding: var(--canon-space-5) var(--canon-space-6);
  border-top: 1px solid var(--canon-ink-200);
}
.canon-tutor__input {
  font-family: var(--canon-font-body);
  font-size: 15px;
  padding: var(--canon-space-3);
  border: 1px solid var(--canon-ink-200);
  border-radius: var(--canon-radius-2);
  resize: vertical;
}
.canon-tutor__input:focus-visible { outline: var(--canon-focus-ring); border-color: var(--canon-primary); }

/* ----------------------------------------------------------- practice */

.canon-practice {
  max-width: var(--canon-measure);
  margin: var(--canon-space-8) auto 0 auto;
}
.canon-practice__card {
  background: var(--canon-surface);
  border: 1px solid var(--canon-ink-200);
  border-radius: var(--canon-radius-3);
  padding: var(--canon-space-6);
  box-shadow: var(--canon-shadow-card);
}
.canon-practice__card + .canon-practice__card { margin-top: var(--canon-space-5); }
.canon-practice__header { margin-bottom: var(--canon-space-5); }
.canon-practice__tag {
  display: inline-block;
  font-family: var(--canon-font-mono);
  font-size: 12px;
  color: var(--canon-primary-dark);
  background: var(--canon-primary-tint);
  padding: 2px 10px;
  border-radius: var(--canon-radius-pill);
  margin-bottom: var(--canon-space-3);
}
.canon-practice__stem {
  font-family: var(--canon-font-display);
  font-weight: 500;
  font-size: 22px;
  line-height: 1.3;
  margin: 0;
}
.canon-practice__stem--correct { color: var(--canon-success); }
.canon-practice__stem--incorrect { color: var(--canon-error); }
.canon-practice__meta { color: var(--canon-ink-500); font-size: 14px; margin: var(--canon-space-3) 0 0 0; font-family: var(--canon-font-mono); }
.canon-practice__explanation { margin-top: var(--canon-space-5); color: var(--canon-ink-700); line-height: 1.65; }
.canon-practice__choices {
  border: 0; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: var(--canon-space-3);
}
.canon-choice {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: start;
  gap: var(--canon-space-4);
  padding: var(--canon-space-4) var(--canon-space-5);
  border: 1px solid var(--canon-ink-200);
  border-radius: var(--canon-radius-2);
  cursor: pointer;
  transition: border-color 120ms ease, background-color 120ms ease;
}
.canon-choice:hover { border-color: var(--canon-primary); }
.canon-choice--selected { border-color: var(--canon-primary); background: var(--canon-primary-tint); }
.canon-choice__key {
  display: inline-flex; width: 28px; height: 28px;
  align-items: center; justify-content: center;
  border: 1px solid var(--canon-ink-200);
  border-radius: var(--canon-radius-pill);
  font-size: 13px;
}
.canon-choice__text { color: var(--canon-ink-900); }
.canon-practice__footer { margin-top: var(--canon-space-5); display: flex; justify-content: flex-end; }
.canon-mono { font-family: var(--canon-font-mono); font-size: 0.9em; }

/* ----------------------------------------------------------- responsive */

@media (max-width: 1024px) {
  .canon-reader {
    grid-template-columns: 220px 1fr;
    grid-template-areas: "sidebar main";
  }
  .canon-right-rail {
    position: fixed;
    right: 0; top: 64px; bottom: 0;
    width: 320px;
    z-index: 15;
    box-shadow: var(--canon-shadow-overlay);
  }
}
@media (max-width: 720px) {
  .canon-reader { grid-template-columns: 1fr; grid-template-areas: "main"; }
  .canon-sidebar { position: static; border-right: none; border-bottom: 1px solid var(--canon-ink-200); max-height: none; }
  .canon-right-rail { width: 100%; }
  .canon-tutor { width: 100%; top: auto; height: 70vh; border-top: 1px solid var(--canon-ink-200); }
  .canon-chunk__heading { font-size: 24px; }
  .canon-display { font-size: 32px; }
  .canon-reader__main { padding: var(--canon-space-5) var(--canon-space-5); }
}

/* ----------------------------------------------------------- motion */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0s !important;
    animation-duration: 0s !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}

/* ---------------------------------------------------- P0-A lesson layout */

.canon-lesson { display: flex; flex-direction: column; gap: var(--canon-space-6); }
.canon-lesson__header { display: flex; flex-direction: column; gap: var(--canon-space-3); padding-bottom: var(--canon-space-4); border-bottom: 1px solid var(--canon-ink-200); }
.canon-lesson__crumbs { display: flex; gap: var(--canon-space-3); align-items: center; font-size: 13px; color: var(--canon-ink-700); }
.canon-lesson__code { background: var(--canon-ink-100); padding: 2px 8px; border-radius: 4px; font-size: 12px; color: var(--canon-primary-dark); }
.canon-lesson__bucket { color: var(--canon-ink-500); }
.canon-lesson__title { font-family: var(--canon-font-display, 'Fraunces', serif); font-size: 32px; margin: 0; line-height: 1.2; color: var(--canon-ink-900); }
.canon-lesson__progress { display: flex; flex-direction: column; gap: var(--canon-space-2); }
.canon-lesson__progress-track { height: 4px; background: var(--canon-ink-200); border-radius: 2px; overflow: hidden; }
.canon-lesson__progress-fill { height: 100%; background: var(--canon-primary); transition: width 180ms ease; }
.canon-lesson__progress-label { font-size: 12px; color: var(--canon-ink-500); letter-spacing: 0.02em; }

.canon-lesson__section { border: 1px solid var(--canon-ink-200); border-radius: 8px; padding: var(--canon-space-5); background: var(--canon-paper); }
.canon-lesson__section-title { font-family: var(--canon-font-display, 'Fraunces', serif); font-size: 20px; margin: 0 0 var(--canon-space-3) 0; color: var(--canon-ink-900); }
.canon-lesson__meta { color: var(--canon-ink-500); font-size: 14px; margin: 0; }
.canon-lesson__objective-list { margin: 0; padding-left: var(--canon-space-5); display: flex; flex-direction: column; gap: var(--canon-space-2); }
.canon-lesson__objective { color: var(--canon-ink-900); line-height: 1.5; }

.canon-lesson__check-list { list-style: none; padding: 0; margin: var(--canon-space-3) 0 0 0; display: flex; flex-direction: column; gap: var(--canon-space-4); }
.canon-lesson__check-item { margin: 0; }
.canon-lesson__check-card { border: 1px solid var(--canon-ink-200); border-radius: 6px; padding: var(--canon-space-4); background: var(--canon-paper); }
.canon-lesson__check-card--correct { border-left: 4px solid var(--canon-primary); }
.canon-lesson__check-card--incorrect { border-left: 4px solid var(--canon-ink-700); }
.canon-lesson__check-header { display: flex; flex-direction: column; gap: var(--canon-space-2); margin-bottom: var(--canon-space-3); }
.canon-lesson__check-tag { font-size: 12px; color: var(--canon-ink-500); letter-spacing: 0.04em; text-transform: uppercase; }
.canon-lesson__check-stem { margin: 0; color: var(--canon-ink-900); font-size: 16px; line-height: 1.5; }
.canon-lesson__check-choices { border: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--canon-space-2); }
.canon-lesson__check-footer { margin-top: var(--canon-space-3); }
.canon-lesson__check-meta { color: var(--canon-ink-500); font-size: 14px; margin: var(--canon-space-2) 0; }
.canon-lesson__check-explanation { color: var(--canon-ink-900); line-height: 1.55; margin: 0; }

.canon-lesson__related-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--canon-space-2); }
.canon-lesson__related-link { display: flex; gap: var(--canon-space-3); align-items: baseline; color: var(--canon-ink-900); text-decoration: none; padding: var(--canon-space-2) 0; }
.canon-lesson__related-link:hover { color: var(--canon-primary-dark); }
.canon-lesson__related-code { font-size: 12px; background: var(--canon-ink-100); padding: 2px 6px; border-radius: 3px; color: var(--canon-primary-dark); }
.canon-lesson__related-title { color: inherit; }

.canon-lesson__footer-row { display: flex; flex-wrap: wrap; gap: var(--canon-space-3); align-items: center; }
.canon-lesson__footer-form { display: inline-flex; margin: 0; }
.canon-lesson__footer-status { flex: 1; min-width: 0; color: var(--canon-ink-500); font-size: 14px; }
.canon-lesson__next-link { margin-left: auto; display: inline-flex; gap: var(--canon-space-2); align-items: center; }
.canon-lesson__next-code { font-size: 12px; opacity: 0.9; }

/* ----------------------------------------------- P0-C practice mode */

.canon-practice-intro { padding: var(--canon-space-7); max-width: var(--canon-measure); margin: 0 auto; display: flex; flex-direction: column; gap: var(--canon-space-5); }
.canon-practice-intro__panel { display: flex; flex-direction: column; gap: var(--canon-space-4); }
.canon-practice-intro__form { display: flex; flex-direction: column; gap: var(--canon-space-3); align-items: flex-start; padding: var(--canon-space-4); border: 1px solid var(--canon-ink-200); border-radius: 8px; }
.canon-practice-intro__filter { display: flex; flex-direction: column; gap: var(--canon-space-2); font-size: 14px; width: 100%; max-width: 360px; }
.canon-input { font: inherit; padding: var(--canon-space-2) var(--canon-space-3); border: 1px solid var(--canon-ink-200); border-radius: 4px; color: var(--canon-ink-900); background: var(--canon-paper); }

.canon-practice-runner { padding: var(--canon-space-6) var(--canon-space-7); max-width: var(--canon-measure); margin: 0 auto; display: flex; flex-direction: column; gap: var(--canon-space-5); }
.canon-practice-result { padding: var(--canon-space-6) var(--canon-space-7); max-width: var(--canon-measure); margin: 0 auto; display: flex; flex-direction: column; gap: var(--canon-space-5); }
.canon-practice-breakdown { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.canon-practice-breakdown th, .canon-practice-breakdown td { text-align: left; padding: var(--canon-space-2) var(--canon-space-3); border-bottom: 1px solid var(--canon-ink-200); }
.canon-practice-breakdown th { color: var(--canon-ink-500); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; }

/* ----------------------------------------------- P0-B study session mode */

.canon-session { padding: var(--canon-space-6) var(--canon-space-7); max-width: var(--canon-measure); margin: 0 auto; display: flex; flex-direction: column; gap: var(--canon-space-5); }
.canon-session-end { padding: var(--canon-space-6) var(--canon-space-7); max-width: var(--canon-measure); margin: 0 auto; display: flex; flex-direction: column; gap: var(--canon-space-5); }
.canon-session-end__stats { display: grid; grid-template-columns: auto 1fr; gap: var(--canon-space-2) var(--canon-space-5); margin: 0; }
.canon-session-end__stats dt { color: var(--canon-ink-500); font-size: 14px; text-transform: uppercase; letter-spacing: 0.04em; }
.canon-session-end__stats dd { margin: 0; color: var(--canon-ink-900); }
.canon-session-end__deltas { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--canon-space-2); }
.canon-session-end__delta { padding: var(--canon-space-2) 0; border-bottom: 1px solid var(--canon-ink-200); }
.canon-session-end__delta-up { color: var(--canon-primary-dark); }

/* ----------------------------------------------- P1-A progress dashboard */

.canon-progress { padding: var(--canon-space-6) var(--canon-space-7); max-width: var(--canon-measure); margin: 0 auto; display: flex; flex-direction: column; gap: var(--canon-space-6); }
.canon-progress__hero { display: grid; grid-template-columns: 1fr auto; gap: var(--canon-space-4); align-items: end; border-bottom: 1px solid var(--canon-ink-200); padding-bottom: var(--canon-space-5); }
.canon-progress__readiness { font-family: var(--canon-font-display); font-size: 64px; line-height: 1; color: var(--canon-primary-dark); font-variant-numeric: tabular-nums; }
.canon-progress__readiness-label { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--canon-ink-500); margin-top: var(--canon-space-2); }
.canon-progress__section-title { font-family: var(--canon-font-display); font-size: 20px; margin: 0 0 var(--canon-space-3); }
.canon-progress__heatmap { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: var(--canon-space-3); }
.canon-progress__heatmap-node { border: 1px solid var(--canon-ink-200); border-radius: var(--canon-radius-2); padding: var(--canon-space-3) var(--canon-space-4); background: var(--canon-surface); display: flex; flex-direction: column; gap: var(--canon-space-2); font-variant-numeric: tabular-nums; }
.canon-progress__heatmap-node--red { border-left: 4px solid var(--canon-error); }
.canon-progress__heatmap-node--amber { border-left: 4px solid var(--canon-warning); }
.canon-progress__heatmap-node--green { border-left: 4px solid var(--canon-success); }
.canon-progress__heatmap-code { font-family: var(--canon-font-mono); font-size: 12px; color: var(--canon-ink-700); letter-spacing: 0.02em; }
.canon-progress__heatmap-pct { font-family: var(--canon-font-display); font-size: 24px; color: var(--canon-ink-900); }
.canon-progress__heatmap-bar { height: 6px; border-radius: 9999px; background: var(--canon-ink-200); overflow: hidden; }
.canon-progress__heatmap-bar-fill { height: 100%; }
.canon-progress__heatmap-bar-fill--red { background: var(--canon-error); }
.canon-progress__heatmap-bar-fill--amber { background: var(--canon-warning); }
.canon-progress__heatmap-bar-fill--green { background: var(--canon-success); }

.canon-progress__stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: var(--canon-space-4); }
.canon-progress__stat-card { border: 1px solid var(--canon-ink-200); border-radius: var(--canon-radius-2); padding: var(--canon-space-4); background: var(--canon-surface); display: flex; flex-direction: column; gap: var(--canon-space-1); }
.canon-progress__stat-label { font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--canon-ink-500); }
.canon-progress__stat-value { font-family: var(--canon-font-display); font-size: 28px; color: var(--canon-ink-900); font-variant-numeric: tabular-nums; }
.canon-progress__stat-sub { font-size: 13px; color: var(--canon-ink-700); }

.canon-progress__next-lesson { border: 1px solid var(--canon-ink-200); border-left: 4px solid var(--canon-primary); border-radius: var(--canon-radius-2); padding: var(--canon-space-4); background: var(--canon-surface); display: flex; flex-direction: column; gap: var(--canon-space-2); }
.canon-progress__next-heading { font-family: var(--canon-font-display); font-size: 18px; color: var(--canon-ink-900); margin: 0; }
.canon-progress__next-reason { color: var(--canon-ink-700); font-size: 14px; margin: 0; }

/* ----------------------------------------------- P1-B mock exam mode */

.canon-exam-intro { padding: var(--canon-space-8) var(--canon-space-7); max-width: var(--canon-measure); margin: 0 auto; }
.canon-exam-intro__table { list-style: none; padding: 0; margin: var(--canon-space-4) 0; display: grid; grid-template-columns: auto 1fr; gap: var(--canon-space-2) var(--canon-space-5); }
.canon-exam-intro__table dt { color: var(--canon-ink-500); font-size: 14px; text-transform: uppercase; letter-spacing: 0.04em; }
.canon-exam-intro__table dd { margin: 0; color: var(--canon-ink-900); font-variant-numeric: tabular-nums; }
.canon-exam-intro__lockout { border: 1px solid var(--canon-warning); border-left: 4px solid var(--canon-warning); padding: var(--canon-space-4); border-radius: var(--canon-radius-2); background: var(--canon-surface); margin-top: var(--canon-space-5); }
.canon-exam-item { padding: var(--canon-space-6) var(--canon-space-7); max-width: var(--canon-measure); margin: 0 auto; display: flex; flex-direction: column; gap: var(--canon-space-5); }
.canon-exam-item__clock { font-family: var(--canon-font-mono); font-size: 20px; color: var(--canon-primary-dark); font-variant-numeric: tabular-nums; }
.canon-exam-end { padding: var(--canon-space-6) var(--canon-space-7); max-width: var(--canon-measure); margin: 0 auto; display: flex; flex-direction: column; gap: var(--canon-space-5); }
.canon-exam-end__verdict--pass { color: var(--canon-success); font-family: var(--canon-font-display); font-size: 32px; }
.canon-exam-end__verdict--fail { color: var(--canon-error); font-family: var(--canon-font-display); font-size: 32px; }

/* ----------------------------------------------- P2 credential + verify */

.canon-credential { padding: var(--canon-space-6) var(--canon-space-7); max-width: var(--canon-measure); margin: 0 auto; display: flex; flex-direction: column; gap: var(--canon-space-5); }
.canon-credential__gap { border: 1px solid var(--canon-warning); border-left: 4px solid var(--canon-warning); padding: var(--canon-space-4); border-radius: var(--canon-radius-2); background: var(--canon-surface); }
.canon-credential__ready { border: 1px solid var(--canon-success); border-left: 4px solid var(--canon-success); padding: var(--canon-space-4); border-radius: var(--canon-radius-2); background: var(--canon-surface); }
.canon-verify { padding: var(--canon-space-8) var(--canon-space-7); max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; gap: var(--canon-space-5); }
.canon-verify__card { border: 1px solid var(--canon-ink-200); border-radius: var(--canon-radius-3); padding: var(--canon-space-6); background: var(--canon-surface); display: flex; flex-direction: column; gap: var(--canon-space-3); }
.canon-verify__verdict { font-family: var(--canon-font-display); font-size: 28px; padding: var(--canon-space-3) 0; }
.canon-verify__verdict--valid { color: var(--canon-success); }
.canon-verify__verdict--invalid { color: var(--canon-error); }
.canon-verify__kv { display: grid; grid-template-columns: auto 1fr; gap: var(--canon-space-2) var(--canon-space-5); margin: 0; font-size: 14px; }
.canon-verify__kv dt { color: var(--canon-ink-500); text-transform: uppercase; letter-spacing: 0.04em; font-size: 12px; }
.canon-verify__kv dd { margin: 0; color: var(--canon-ink-900); font-family: var(--canon-font-mono); word-break: break-all; }