:root {
  --paper: #16120e;
  --sheet: #221c16;
  --ink: #f3ead8;
  --mute: #c4b49a;
  --line: #3a3128;
  --teal: #3bb89a;
  --teal-ink: #08221c;
  --lamp: #e3b34a;
  --lamp-ink: #2a1d04;
  --focus: #f0c56a;
  --danger-bg: #3a2218;
  --radius: 14px;
  --measure: 68ch;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--paper);
  color: var(--ink);
  font-family: "Atkinson Hyperlegible", "Segoe UI", sans-serif;
  font-size: 18px;
  line-height: 1.55;
}

::selection {
  background: #3d5c52;
  color: var(--ink);
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  background: var(--lamp);
  color: var(--lamp-ink);
  padding: 8px 12px;
  z-index: 10;
}

.skip:focus { top: 12px; }

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

.mast {
  padding: 2rem 1.25rem 1.25rem;
  border-bottom: 1px solid var(--line);
}

.who {
  margin: 0 0 0.35rem;
  font-family: Lexend, sans-serif;
  font-weight: 650;
  font-size: 0.95rem;
  color: var(--lamp);
}

.mast h1 {
  margin: 0;
  max-width: 13em;
  font-family: Lexend, sans-serif;
  font-weight: 750;
  font-size: clamp(2rem, 5vw, 3.15rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.focus, .howto {
  max-width: var(--measure);
  color: var(--mute);
}

.focus { margin: 0.85rem 0 0; }
.howto { margin: 0.4rem 0 0; }

.mast-tools {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.4rem;
}

.search-wrap {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  background: var(--sheet);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.7rem 0.9rem;
}

.search-wrap svg {
  width: 1.15rem;
  height: 1.15rem;
  color: var(--mute);
  flex: 0 0 auto;
}

.search-wrap input {
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  caret-color: var(--lamp);
}

.search-wrap input::placeholder { color: #b8aa94; }
.search-wrap input:focus { outline: none; }

.modes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.mode, button {
  font: inherit;
  cursor: pointer;
}

.mode, .ghost, .parts-toggle, .drill-actions button, .drill-nav button, .q-tools button, .more-btn {
  border: 1px solid var(--line);
  background: var(--sheet);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
}

.mode.is-on, .part.is-on, #revealBtn, #nextCard, .more-btn {
  background: var(--teal);
  border-color: #2a8d76;
  color: var(--teal-ink);
}

.progress {
  margin: 0;
  color: var(--mute);
  font-size: 0.95rem;
}

.shell {
  display: grid;
}

.rail {
  border-bottom: 1px solid var(--line);
  padding: 0.85rem 1.25rem 1rem;
}

.parts-toggle {
  width: 100%;
}

.parts {
  display: none;
  margin-top: 0.7rem;
}

.parts.is-open { display: grid; gap: 0.3rem; }

.part {
  display: block;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  color: var(--mute);
  border-radius: 10px;
  padding: 0.45rem 0.55rem;
}

.part.is-on {
  background: var(--sheet);
  color: var(--ink);
}

.well {
  padding: 1.1rem 1.25rem 4rem;
}

.view { display: none; }
.view.is-on { display: block; }

.sheet, .q {
  background: var(--sheet);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.15rem 1.15rem 1.2rem;
  margin: 0 0 0.85rem;
}

.sheet h2, .q h3 {
  margin: 0 0 0.65rem;
  font-family: Lexend, sans-serif;
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.q-top {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  align-items: flex-start;
}

.q-num {
  margin: 0 0 0.35rem;
  color: var(--lamp);
  font-family: Lexend, sans-serif;
  font-size: 0.85rem;
  font-weight: 650;
}

.lead {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 700;
}

.rest, .note, .extra, .q p {
  color: var(--mute);
}

.rest p, .extra p { margin: 0.65rem 0 0; }

.extra {
  margin-top: 0.85rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line);
}

.extra strong {
  display: block;
  color: var(--ink);
  margin-bottom: 0.3rem;
}

.extra ul, .ask, .memorize {
  margin: 0.2rem 0 0;
  padding-left: 1.15rem;
}

.command {
  display: inline-block;
  margin-top: 0.7rem;
  padding: 0.2rem 0.45rem;
  background: #140f0c;
  color: var(--lamp);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: 6px;
}

.pin {
  display: inline-block;
  margin-left: 0.4rem;
  padding: 0.05rem 0.45rem;
  background: var(--lamp);
  color: var(--lamp-ink);
  border-radius: 999px;
  font-family: Lexend, sans-serif;
  font-size: 0.72rem;
  font-weight: 650;
}

.note {
  margin: 0.7rem 0 0;
  padding: 0.65rem 0.75rem;
  background: var(--danger-bg);
  color: #f0d2b8;
  border-radius: 10px;
}

.q-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.85rem;
}

.empty {
  color: var(--mute);
  padding: 2rem 0.2rem;
}

.drill-sheet {
  min-height: 22rem;
  background: var(--sheet);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem 1.2rem 1.3rem;
}

.drill-meta {
  margin: 0 0 0.7rem;
  color: var(--lamp);
  font-family: Lexend, sans-serif;
  font-weight: 650;
}

.drill-sheet h2 {
  margin: 0 0 1rem;
  font-family: Lexend, sans-serif;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.drill-a .lead { font-size: 1.2rem; }
.drill-actions, .drill-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.1rem;
}

.keys {
  margin: 1.1rem 0 0;
  color: var(--mute);
  font-size: 0.92rem;
}

.memorize li, .ask li { margin: 0.55rem 0; }
.memorize strong {
  display: block;
  color: var(--ink);
}

.speech-list article { margin-top: 1.1rem; }
.speech-list h3 {
  margin: 0 0 0.35rem;
  font-family: Lexend, sans-serif;
}

.story-line {
  margin-top: 1rem;
  color: var(--lamp);
  font-family: Lexend, sans-serif;
  font-weight: 650;
}

.glossary {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.glossary th, .glossary td {
  text-align: left;
  padding: 0.55rem 0.4rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.glossary th { color: var(--lamp); font-family: Lexend, sans-serif; font-weight: 650; }
.glossary td:first-child { color: var(--ink); width: 38%; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #4a3f33; border-radius: 99px; }
::-webkit-scrollbar-track { background: var(--paper); }

@media (min-width: 920px) {
  .mast {
    display: grid;
    grid-template-columns: minmax(22rem, 1.25fr) minmax(18rem, 0.9fr);
    gap: 0.4rem 2.4rem;
    align-items: start;
    padding: 2.4rem 2rem 1.5rem;
  }

  .mast-id { grid-column: 1; }
  .howto { grid-column: 1; margin-top: 0.75rem; }
  .mast-tools { grid-column: 2; grid-row: 1 / span 2; margin-top: 1.6rem; }

  .shell {
    grid-template-columns: 16.5rem minmax(0, 1fr);
    align-items: start;
  }

  .rail {
    position: sticky;
    top: 0;
    height: 100vh;
    overflow: auto;
    border-bottom: 0;
    border-right: 1px solid var(--line);
    padding: 1.1rem 0.9rem;
  }

  .parts-toggle { display: none; }
  .parts { display: grid; gap: 0.2rem; margin-top: 0; }
  .well { padding: 1.4rem 2rem 5rem; max-width: 52rem; }
}