@import url("curso.css");

.problem-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.problem-links a {
  min-height: 38px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
}

.problem-links a:hover { border-color: var(--green); }

.problem-brief {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: 1px solid var(--line);
  background: var(--surface);
}

.brief-item {
  min-width: 0;
  padding: 16px;
}

.brief-item + .brief-item { border-left: 1px solid var(--line); }
.brief-item h3 { color: var(--green); }
.brief-item p { margin-bottom: 0; }

.exercise-lab {
  width: 100%;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.exercise-config,
.player-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
}

.exercise-config { background: #171b20; }

.exercise-config label,
.speed-control {
  color: var(--muted);
  font-size: .82rem;
  font-weight: 800;
}

.exercise-config input,
.exercise-config select {
  min-height: 40px;
  padding: 7px 10px;
  border: 1px solid #555e69;
  border-radius: 6px;
  outline: none;
  background: #0f1215;
  color: var(--text);
}

.exercise-config input[type="text"] { flex: 1 1 280px; min-width: 0; }
.exercise-config input[type="number"] { width: 86px; }
.exercise-config input:focus,
.exercise-config select:focus { border-color: var(--blue); }

.exercise-config button,
.player-controls button {
  min-height: 40px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #2a3037;
  color: var(--text);
  cursor: pointer;
  font-weight: 850;
}

.exercise-config button:hover,
.player-controls button:hover { border-color: var(--blue); }
.exercise-config button.active { border-color: var(--green); color: var(--green); }
.player-controls .next-button { background: var(--green); color: var(--ink); }
.player-controls .play-button { background: var(--yellow); color: var(--ink); }
.player-controls button:disabled { cursor: default; opacity: .45; }

.speed-control {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  margin-left: auto;
}

.speed-control input { accent-color: var(--green); }

.step-copy {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: center;
  min-height: 72px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
  background: #111519;
}

.step-badge {
  min-width: 92px;
  padding: 6px 9px;
  border: 1px solid #655b32;
  border-radius: 5px;
  color: var(--yellow);
  font: 800 .78rem/1.4 Consolas, "Courier New", monospace;
  text-align: center;
}

.step-copy p { margin: 0; color: var(--text); }

.exercise-stage {
  min-height: 320px;
  padding: 22px 18px;
  overflow-x: auto;
  background-color: #12161a;
  background-image:
    linear-gradient(#242a30 1px, transparent 1px),
    linear-gradient(90deg, #242a30 1px, transparent 1px);
  background-size: 28px 28px;
}

.stage-section + .stage-section { margin-top: 22px; }

.stage-title {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  align-items: baseline;
  margin-bottom: 10px;
}

.stage-title h3 { margin: 0; }
.stage-title span { color: var(--muted); font-size: .82rem; }

.token-row,
.operation-row,
.card-track,
.discard-track,
.record-track {
  display: flex;
  gap: 8px;
  align-items: stretch;
  min-width: max-content;
}

.token,
.operation-token {
  display: grid;
  place-items: center;
  min-width: 43px;
  min-height: 48px;
  padding: 6px;
  border: 1px solid #4f5964;
  border-radius: 5px;
  background: #1a2026;
  color: var(--muted);
  font: 800 .9rem/1 Consolas, "Courier New", monospace;
}

.token.processed,
.operation-token.processed { border-color: #356c55; color: var(--green); }
.token.current,
.operation-token.current { border: 2px solid var(--red); background: #352126; color: var(--text); transform: translateY(-3px); }
.token.error { border-color: var(--red); background: #3a2024; color: var(--red); }

.state-grid {
  display: grid;
  grid-template-columns: minmax(260px, .8fr) minmax(0, 1.2fr);
  gap: 22px;
  align-items: stretch;
}

.state-pane {
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(16, 19, 22, .88);
}

.state-pane h3 { margin-bottom: 12px; }

.mini-stack {
  display: flex;
  flex-direction: column-reverse;
  gap: 6px;
  justify-content: flex-start;
  min-height: 190px;
  padding: 12px 14px;
  border: solid #66717c;
  border-width: 0 3px 3px;
}

.stack-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  min-height: 42px;
  padding: 7px 10px;
  border: 1px solid var(--green);
  background: #183027;
  color: var(--text);
  font-family: Consolas, "Courier New", monospace;
}

.stack-item.top { border-color: var(--yellow); }
.stack-item small { color: var(--muted); }

.empty-structure {
  display: grid;
  place-items: center;
  min-height: 94px;
  border: 1px dashed #4f5964;
  color: var(--muted);
}

.decision-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 12px;
  margin: 0;
}

.decision-list dt { color: var(--muted); font-size: .78rem; font-weight: 850; text-transform: uppercase; }
.decision-list dd { margin: 0; color: var(--text); overflow-wrap: anywhere; }

.result-banner {
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px solid #356c55;
  background: #15251e;
  color: var(--green);
  font-weight: 900;
}

.result-banner.invalid { border-color: #78464b; background: #311d20; color: var(--red); }

.playing-card {
  display: grid;
  grid-template-rows: auto 1fr auto;
  width: 76px;
  min-width: 76px;
  min-height: 108px;
  padding: 7px;
  border: 2px solid var(--blue);
  border-radius: 7px;
  background: #e8edf2;
  color: #11161b;
  font-weight: 900;
}

.playing-card strong { display: grid; place-items: center; font-size: 1.7rem; }
.playing-card small { font-size: .66rem; text-transform: uppercase; }
.playing-card.front { border-color: var(--red); transform: translateY(-5px); }
.playing-card.back { box-shadow: inset 0 -5px 0 var(--green); }
.playing-card.moved { border-color: var(--yellow); background: #fff0bd; }
.playing-card.discarded { min-height: 76px; opacity: .5; filter: saturate(.3); }

.queue-arrow {
  display: flex;
  justify-content: space-between;
  min-width: 360px;
  margin-top: 8px;
  color: var(--muted);
  font-size: .75rem;
  font-weight: 800;
  text-transform: uppercase;
}

.record-card {
  display: grid;
  grid-template-rows: auto repeat(3, auto);
  width: 166px;
  min-width: 166px;
  overflow: hidden;
  border: 2px solid var(--blue);
  background: #192838;
}

.record-card strong { padding: 9px 10px; border-bottom: 1px solid rgba(255,255,255,.16); overflow-wrap: anywhere; }
.record-card span { padding: 5px 10px; color: var(--muted); font-size: .78rem; }
.record-card.pivot { border-color: var(--yellow); background: #332c18; }
.record-card.current { border-color: var(--red); background: #352126; transform: translateY(-5px); }
.record-card.boundary { box-shadow: inset 0 -5px 0 var(--green); }
.record-card.placed { border-color: var(--green); background: #183027; }
.record-card.outside { opacity: .38; }

.range-scale {
  display: flex;
  min-width: max-content;
  margin-top: 9px;
}

.range-scale span {
  width: 174px;
  min-width: 174px;
  color: var(--muted);
  font: .72rem Consolas, "Courier New", monospace;
  text-align: center;
}

.criterion-stack { display: grid; gap: 6px; }

.criterion-row {
  display: grid;
  grid-template-columns: 28px minmax(120px, .7fr) minmax(0, 1.3fr);
  gap: 9px;
  align-items: center;
  min-height: 43px;
  padding: 7px 10px;
  border-left: 3px solid #4f5964;
  background: #181d22;
  color: var(--muted);
}

.criterion-row.active { border-color: var(--yellow); background: #292419; color: var(--text); }
.criterion-row.decided { border-color: var(--green); }
.criterion-row b { color: var(--text); }

.candidate-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: 1px solid var(--line);
  background: rgba(16, 19, 22, .9);
}

.candidate-panel {
  min-width: 0;
  min-height: 210px;
  padding: 14px;
}

.candidate-panel + .candidate-panel { border-left: 1px solid var(--line); }
.candidate-panel.eliminated { opacity: .45; filter: saturate(.4); }

.candidate-head {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.candidate-head h3 { margin: 0; }
.candidate-status { color: var(--green); font-size: .72rem; font-weight: 900; text-transform: uppercase; }
.eliminated .candidate-status { color: var(--red); }

.candidate-items {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-content: flex-start;
  min-height: 76px;
}

.candidate-item {
  min-width: 43px;
  padding: 7px 8px;
  border: 1px solid var(--blue);
  background: #192838;
  color: var(--text);
  font-family: Consolas, "Courier New", monospace;
  text-align: center;
}

.candidate-item.next-out { border-color: var(--yellow); background: #332c18; }
.candidate-panel p { margin: 10px 0 0; font-size: .8rem; }

.ranking-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  background: rgba(16, 19, 22, .92);
}

.ranking-table th,
.ranking-table td {
  padding: 9px 11px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.ranking-table th { color: var(--muted); font-size: .75rem; text-transform: uppercase; }
.ranking-table tr.active { background: #352126; }
.ranking-table tr.sorted-prefix { box-shadow: inset 4px 0 0 var(--green); }
.ranking-table tr.selected { background: #183027; }
.ranking-table code { color: var(--yellow); }

.movement-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  background: var(--surface-2);
}

.movement-summary > div { min-height: 82px; padding: 12px 14px; }
.movement-summary > div + div { border-left: 1px solid var(--line); }
.movement-summary strong { display: block; margin-bottom: 5px; color: var(--muted); font-size: .72rem; text-transform: uppercase; }
.movement-summary span { color: var(--text); overflow-wrap: anywhere; }

.solution-map {
  display: grid;
  gap: 10px;
  counter-reset: solution-step;
}

.solution-step {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  align-items: start;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.solution-step::before {
  counter-increment: solution-step;
  content: counter(solution-step);
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--green);
  border-radius: 50%;
  color: var(--green);
  font-weight: 900;
}

.solution-step:last-child { border-bottom: 0; }
.solution-step h3 { margin-bottom: 3px; }
.solution-step p { margin-bottom: 0; }

.code-details { border: 1px solid var(--line); background: #0c0f12; }
.code-details summary { padding: 12px 14px; cursor: pointer; color: var(--text); font-weight: 850; }
.code-details[open] summary { border-bottom: 1px solid var(--line); }

@media (max-width: 780px) {
  .problem-links { justify-content: flex-start; }
  .problem-brief,
  .state-grid,
  .candidate-grid,
  .movement-summary { grid-template-columns: 1fr; }
  .brief-item + .brief-item,
  .candidate-panel + .candidate-panel,
  .movement-summary > div + div { border-top: 1px solid var(--line); border-left: 0; }
  .speed-control { width: 100%; margin-left: 0; }
  .player-controls button { flex: 1 1 118px; }
  .step-copy { grid-template-columns: 1fr; }
  .exercise-stage { padding-inline: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  .token.current,
  .operation-token.current,
  .playing-card.front,
  .record-card.current { transform: none; }
}