:root {
  --history-ink: #1f2933;
  --history-blue: #165d8f;
  --history-blue-soft: #e7f2f8;
  --history-border: #d7e0e6;
  --history-paper: #fbfcfd;
  --history-gold: #b17819;
}

body {
  max-width: 1180px;
}

.history-eyebrow {
  margin: 0 0 5px;
  color: var(--history-blue);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.archive-intro,
.archive-controls,
.history-results {
  padding: clamp(20px, 4vw, 38px);
  border: 1px solid var(--history-border);
  border-radius: 14px;
  background: var(--history-paper);
  box-shadow: 0 8px 30px rgba(33, 57, 73, 0.07);
}

.archive-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.8fr);
  gap: 30px;
  align-items: start;
}

.archive-intro h2,
.archive-controls h2,
.history-results h2 {
  margin: 0 0 9px;
}

.archive-intro > div > p:last-child {
  max-width: 700px;
  margin-bottom: 0;
  color: #40535f;
  line-height: 1.7;
}

.privacy-note {
  padding: 16px 18px;
  border-left: 4px solid var(--history-gold);
  border-radius: 7px;
  background: #fff8e8;
  color: #5d471b;
  font-size: 12px;
  line-height: 1.55;
}

.privacy-note p {
  margin: 7px 0 0;
}

.archive-controls,
.history-results {
  margin-top: 22px;
}

.controls-heading,
.results-heading {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
}

.archive-summary,
.visible-count {
  margin: 4px 0 0;
  color: #526a77;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

#history-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(150px, 0.6fr)) minmax(220px, 1.4fr) auto;
  gap: 12px;
  align-items: end;
  margin-top: 18px;
}

#history-form label {
  display: grid;
  gap: 6px;
  color: #3c5360;
  font-size: 12px;
  font-weight: 700;
}

#history-form input {
  min-width: 0;
  min-height: 42px;
  padding: 8px 10px;
  border: 1px solid #aebfc9;
  border-radius: 7px;
  background: #fff;
  color: var(--history-ink);
  font: inherit;
  font-weight: 400;
}

#history-form input:focus {
  border-color: var(--history-blue);
  outline: 3px solid rgba(22, 93, 143, 0.14);
}

#load-button {
  min-height: 42px;
  padding: 9px 16px;
  border: 0;
  border-radius: 7px;
  background: var(--history-blue);
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 750;
}

#load-button:disabled {
  cursor: wait;
  opacity: 0.55;
}

.control-note,
.history-status {
  margin: 10px 0 0;
  color: #637883;
  font-size: 11px;
}

.history-status.error {
  color: #8b252b;
}

.thread-list {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.thread-card {
  overflow: hidden;
  border: 1px solid var(--history-border);
  border-radius: 10px;
  background: #fff;
}

.thread-card summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  padding: 15px 17px;
  cursor: pointer;
  list-style: none;
}

.thread-card summary::-webkit-details-marker {
  display: none;
}

.thread-card summary::after {
  content: "+";
  align-self: center;
  color: var(--history-blue);
  font-size: 22px;
  line-height: 1;
}

.thread-card[open] summary::after {
  content: "−";
}

.thread-title {
  margin: 4px 0 0;
  color: var(--history-ink);
  font-size: 14px;
  font-weight: 750;
  line-height: 1.45;
}

.thread-meta,
.turn-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  color: #647984;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

.route-chip,
.artifact-chip {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--history-blue-soft);
  color: #174f70;
  font-size: 10px;
  font-weight: 750;
}

.turns {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--history-border);
}

.turn {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 13px;
  padding: 18px;
}

.turn + .turn {
  border-top: 1px solid #e8edf0;
}

.turn-index {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #edf4f8;
  color: var(--history-blue);
  font-size: 11px;
  font-weight: 800;
}

.question-label,
.answer-label {
  margin: 0 0 4px;
  color: var(--history-blue);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.turn-question {
  margin: 0 0 13px;
  color: var(--history-ink);
  font-weight: 700;
  line-height: 1.55;
}

.turn-answer {
  max-width: 850px;
  color: #354650;
  font-size: 14px;
  line-height: 1.68;
}

.turn-answer p {
  margin: 0 0 0.7em;
}

.turn-details {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 11px;
}

.timeframe-copy {
  margin-top: 10px;
  padding: 8px 10px;
  border-left: 3px solid #b7cfdb;
  background: #f4f8fa;
  color: #536c79;
  font-size: 11px;
}

.empty-state {
  margin-top: 18px;
  padding: 28px;
  border: 1px dashed #b9c8d1;
  border-radius: 9px;
  color: #536a77;
  text-align: center;
}

.empty-state p {
  margin: 5px 0 0;
  font-size: 12px;
}

@media (max-width: 800px) {
  .archive-intro {
    grid-template-columns: 1fr;
  }

  #history-form {
    grid-template-columns: 1fr 1fr;
  }

  .search-field,
  #load-button {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  .controls-heading,
  .results-heading {
    flex-direction: column;
  }

  #history-form {
    grid-template-columns: 1fr;
  }

  .search-field,
  #load-button {
    grid-column: auto;
  }

  .thread-card summary {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .turn {
    grid-template-columns: 1fr;
  }
}