/* ============================================================
   Red Ink — a modern ledger for code review drills
   ============================================================ */

:root {
  --paper: #eef1ec;
  --paper-raised: #f7f8f5;
  --ink: #1c211d;
  --ink-soft: #4b5249;
  --ink-faint: #838d80;
  --rule: #c7cdc0;
  --rule-strong: #a4ab9a;
  --red: #9e2b1f;
  --red-soft: #f3e2dd;
  --accent: #2f5f52;
  --accent-soft: #e0e9e2;
  --focus: #1d5fae;
  --radius: 4px;
  --font-body: "Public Sans", -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;
  color-scheme: light;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  font-variant-numeric: tabular-nums;
}

@media (prefers-reduced-motion: no-preference) {
  .view-enter { animation: fadeUp .22s ease both; }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

a { color: inherit; }

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

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

code, pre, .mono { font-family: var(--font-mono); }

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

.shell {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 20px 80px;
}

.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 28px 0 14px;
  border-bottom: 2px solid var(--ink);
  flex-wrap: wrap;
}

.masthead .brand {
  position: relative;
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.01em;
  padding-bottom: 6px;
}
.masthead .brand .brand-red,
.masthead .brand .brand-dot { color: var(--red); }

.masthead .brand-scribble {
  position: absolute;
  left: -4px;
  bottom: -6px;
  width: calc(100% + 8px);
  height: 14px;
  overflow: visible;
  pointer-events: none;
}
.masthead .brand-scribble path {
  fill: none;
  stroke: var(--red);
  stroke-width: 2.25;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 230;
  stroke-dashoffset: 230;
  animation: brand-scribble-in 0.8s ease-out 0.15s forwards;
}
@keyframes brand-scribble-in {
  to { stroke-dashoffset: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .masthead .brand-scribble path { animation: none; stroke-dashoffset: 0; }
}

.masthead nav {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.masthead nav button {
  background: none;
  border: 1px solid transparent;
  padding: 6px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--ink-soft);
}
.masthead nav button:hover { border-color: var(--rule-strong); color: var(--ink); }
.masthead nav button[disabled] { color: var(--ink-faint); cursor: not-allowed; }
.masthead nav button.current { color: var(--ink); border-color: var(--ink); background: var(--paper-raised); }

/* ---------- track list ---------- */

.track-list {
  margin-top: 24px;
  border-top: 1px solid var(--rule);
}

.track-section-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  padding: 18px 0 6px;
}

.track-row {
  display: grid;
  grid-template-columns: 2.4em 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 14px 4px;
  border-bottom: 1px solid var(--rule);
  cursor: pointer;
  background: none;
  border-left: none; border-right: none; border-top: none;
  width: 100%;
  text-align: left;
}
.track-row:hover { background: var(--paper-raised); }

.track-row .num {
  font-family: var(--font-mono);
  color: var(--ink-faint);
  font-size: 0.95rem;
}

.track-row .meta { display: flex; flex-direction: column; gap: 4px; }
.track-row .name { font-weight: 600; }
.track-row .bar-track {
  height: 4px;
  background: var(--rule);
  border-radius: 2px;
  width: 180px;
  max-width: 40vw;
  overflow: hidden;
}
.track-row .bar-fill { height: 100%; background: var(--accent); }
.track-row .count {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-soft);
  white-space: nowrap;
}

.track-row.locked { opacity: 0.55; cursor: default; }

/* ---------- cards / panels ---------- */

.panel {
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-top: 18px;
}

.crumbline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 22px;
  font-size: 0.82rem;
  color: var(--ink-soft);
  flex-wrap: wrap;
}
.crumbline button.link {
  background: none; border: none; padding: 0; cursor: pointer;
  color: var(--ink-soft); text-decoration: underline; text-underline-offset: 3px;
}
.crumbline button.link:hover { color: var(--ink); }

.level-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 3px 9px;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  color: var(--ink-soft);
}
.level-badge b { color: var(--ink); }

/* ---------- drill card ---------- */

.drill-title { font-size: 1.35rem; font-weight: 700; margin: 10px 0 2px; }
.drill-concept {
  color: var(--ink-soft);
  font-size: 0.94rem;
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 12px;
  margin: 12px 0 18px;
}

.hint-box {
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 0.9rem;
  margin: 14px 0;
}
.hint-box .label { font-weight: 700; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; display: block; margin-bottom: 2px; color: var(--accent); }

.symptom-box {
  font-size: 1.02rem;
  padding: 14px 16px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  margin: 14px 0 18px;
  background: var(--paper);
}

pre[class*="language-"] {
  margin: 10px 0;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
  overflow-x: auto;
  font-size: 0.85rem;
  background: var(--paper) !important;
}
code[class*="language-"] { font-family: var(--font-mono); }

.code-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  margin: 14px 0 -2px;
}

.candidates { display: flex; flex-direction: column; gap: 10px; margin: 12px 0; }
.candidate {
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius);
  padding: 10px 12px;
  cursor: pointer;
  background: var(--paper);
}
.candidate:hover { border-color: var(--ink); }
.candidate .cand-head {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.85rem; color: var(--ink-soft);
  margin-bottom: 4px;
}
.candidate .key {
  display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px; border: 1px solid var(--rule-strong); border-radius: 3px;
  font-size: 0.75rem;
}
.candidate.selected { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
.candidate.correct { border-color: var(--ink); background: var(--accent-soft); }
.candidate.incorrect { border-color: var(--red); background: var(--red-soft); }
.candidate .why { font-size: 0.87rem; color: var(--ink-soft); margin-top: 6px; display: none; }
.candidate.revealed .why { display: block; }

label.field-label {
  display: block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
  margin: 16px 0 6px;
}
textarea {
  width: 100%;
  min-height: 64px;
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius);
  background: var(--paper);
  padding: 10px 12px;
  resize: vertical;
  line-height: 1.45;
}
textarea:focus { border-color: var(--ink); }

.actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 9px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
}
.btn:hover { opacity: 0.88; }
.btn.secondary { background: none; color: var(--ink); }
.btn.secondary:hover { background: var(--paper-raised); }
.btn.danger { border-color: var(--red); color: var(--red); background: none; }
.btn.danger:hover { background: var(--red-soft); }
.kbd-hint { font-family: var(--font-mono); font-size: 0.75rem; color: var(--ink-faint); }
kbd {
  font-family: var(--font-mono);
  border: 1px solid var(--rule-strong);
  border-bottom-width: 2px;
  border-radius: 3px;
  padding: 0 5px;
  font-size: 0.78em;
  background: var(--paper);
}

/* ---------- the reveal: reconciliation columns ---------- */

.reveal {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 2px solid var(--ink);
}
.reveal-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin-bottom: 10px;
}

.ledger {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
}
.ledger .col {
  padding: 14px 16px;
  min-width: 0;
}
.ledger .col + .col { border-left: 1px solid var(--rule); }
.ledger .col-head {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.ledger .col-head.was { color: var(--red); }
.ledger .col-head.now { color: var(--accent); }
.ledger .col-head::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.ledger pre { margin: 0; }
.ledger .prose { font-size: 0.92rem; white-space: pre-wrap; }
.ledger .col.clean-note { font-size: 0.92rem; color: var(--ink-soft); font-style: italic; }

@media (max-width: 640px) {
  .ledger { grid-template-columns: 1fr; }
  .ledger .col + .col { border-left: none; border-top: 1px solid var(--rule); }
}

.mechanism-box {
  margin-top: 14px;
  padding: 12px 14px;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-size: 0.9rem;
}
.mechanism-box .label { font-weight: 700; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-faint); display: block; margin-bottom: 4px; }

.your-answer-box {
  margin-top: 14px;
  font-size: 0.88rem;
  color: var(--ink-soft);
}
.your-answer-box .label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-faint); display: block; margin-bottom: 3px; }
.your-answer-box p { margin: 0 0 8px; white-space: pre-wrap; }

.self-grade {
  margin-top: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.self-grade .prompt { font-size: 0.9rem; color: var(--ink-soft); }

.result-flag {
  margin-top: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: var(--radius);
}
.result-flag.hit { color: var(--accent); background: var(--accent-soft); }
.result-flag.miss { color: var(--red); background: var(--red-soft); }

/* ---------- weak spots / mixed review ---------- */

.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  font-size: 0.92rem;
}
.table th, .table td {
  text-align: left;
  padding: 9px 10px;
  border-bottom: 1px solid var(--rule);
}
.table th {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  font-weight: 600;
}
.table td.num { font-family: var(--font-mono); }
.table tr.clickable { cursor: pointer; }
.table tr.clickable:hover { background: var(--paper-raised); }
.table .miss-count { color: var(--red); font-weight: 700; }

.empty-state {
  padding: 40px 10px;
  text-align: center;
  color: var(--ink-soft);
}

.stat-row { display: flex; gap: 22px; margin-top: 18px; flex-wrap: wrap; }
.stat {
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 12px 16px;
  min-width: 110px;
  background: var(--paper-raised);
}
.stat .n { font-family: var(--font-mono); font-size: 1.5rem; font-weight: 700; }
.stat .l { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-faint); margin-top: 2px; }

footer.foot {
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--ink-faint);
}
footer.foot button.link {
  background: none; border: none; color: var(--ink-faint); text-decoration: underline;
  text-underline-offset: 3px; cursor: pointer; font-size: inherit; padding: 0;
}
footer.foot button.link:hover { color: var(--ink-soft); }