/* =========================================================
   Chemistry@BGS — A Level Paper 3 question finder
   ========================================================= */

.paper3-page {
  --paper3-red: #c7222a;
  --paper3-gold: #d7aa24;
  --paper3-ink: #2e3034;
  --paper3-muted: #68717d;

  --inorganic: #276f86;
  --inorganic-dark: #19586c;
  --inorganic-soft: #edf6f8;
  --inorganic-line: #c8e0e6;

  --organic: #73518a;
  --organic-dark: #5c3d71;
  --organic-soft: #f6f0f8;
  --organic-line: #dfcfe6;

  background: linear-gradient(180deg, #f8f9fb 0, #ffffff 360px);
}

.paper3-shell {
  max-width: none;
  width: min(1400px, calc(100% - 56px));
  margin: 0 auto;
  padding: 34px 0 80px;
}

.paper3-breadcrumb {
  margin-bottom: 22px;
}

.paper3-breadcrumb a,
.paper3-breadcrumb a:visited {
  color: var(--paper3-red);
  font-weight: 800;
  text-decoration: none;
}

.paper3-breadcrumb a:hover {
  color: #9f1118;
}

.paper3-hero {
  display: block;

  margin-bottom: 20px;
  padding: 22px 30px 24px;

  background: #ffffff;
  border: 1px solid #e0e4e8;
  border-top: 5px solid var(--paper3-gold);
  border-radius: 22px;
  box-shadow: 0 10px 34px rgba(37, 42, 49, 0.06);
}

.paper3-hero__eyebrow {
  margin: 0 0 7px;
  color: var(--paper3-red);
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.paper3-hero h2 {
  margin: 0;
  color: var(--paper3-ink);
  font-size: clamp(2.15rem, 3.6vw, 3.45rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
}


.paper3-or-note {
  justify-self: center;
  max-width: 520px;
  padding: 9px 13px;
  color: #664e05;
  background: #fff8dd;
  border: 1px solid #ead58c;
  border-radius: 10px;
  font-size: 0.78rem;
  line-height: 1.35;
  text-align: center;
}

.paper3-or-note strong {
  color: #493700;
}

.paper3-filter-panel,
.paper3-results-panel {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid #e0e4e8;
  border-radius: 20px;
  box-shadow: 0 8px 28px rgba(37, 42, 49, 0.05);
}

.paper3-filter-panel {
  padding: 20px 22px 22px;
  margin-bottom: 22px;
}

.paper3-panel-heading {
  display: grid;
  grid-template-columns: auto minmax(260px, 1fr) auto;
  align-items: center;
  gap: 18px;
  margin-bottom: 14px;
}

.paper3-panel-heading h3 {
  margin: 0;
  color: var(--paper3-ink);
  font-size: 1.45rem;
}


.paper3-clear-button {
  flex: 0 0 auto;
  margin: 0;
  padding: 8px 14px;
  color: #ffffff;
  background: var(--paper3-red);
  border-radius: 999px;
  font-size: 0.84rem;
}

.paper3-clear-button:disabled {
  color: #8a9098;
  background: #eceff2;
  cursor: default;
}

.paper3-filter-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.paper3-filter-group {
  min-width: 0;
  margin: 0;
  padding: 13px;
  border: 1px solid;
  border-radius: 14px;
}

.paper3-filter-group--inorganic {
  background: var(--inorganic-soft);
  border-color: var(--inorganic-line);
}

.paper3-filter-group--organic {
  background: var(--organic-soft);
  border-color: var(--organic-line);
}

.paper3-filter-group legend {
  padding: 0 7px;
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.paper3-filter-group legend span {
  margin-right: 6px;
}

.paper3-filter-group--inorganic legend {
  color: var(--inorganic-dark);
}

.paper3-filter-group--organic legend {
  color: var(--organic-dark);
}

.paper3-filter-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}

.paper3-topic-filter {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  min-height: 42px;
  padding: 7px 9px;
  background: #ffffff;
  border: 1px solid rgba(30, 38, 48, 0.1);
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 0 2px 7px rgba(24, 31, 40, 0.025);
}

.paper3-topic-filter:hover {
  border-color: rgba(30, 38, 48, 0.2);
}

.paper3-topic-filter input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.paper3-topic-filter__check {
  display: grid;
  place-items: center;
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  color: transparent;
  background: #ffffff;
  border: 2px solid #c9ced4;
  border-radius: 5px;
  font-size: 0.7rem;
  font-weight: 900;
  line-height: 1;
}

.paper3-filter-group--inorganic input:checked + .paper3-topic-filter__check {
  color: #ffffff;
  background: var(--inorganic);
  border-color: var(--inorganic);
}

.paper3-filter-group--organic input:checked + .paper3-topic-filter__check {
  color: #ffffff;
  background: var(--organic);
  border-color: var(--organic);
}

.paper3-topic-filter:has(input:focus-visible) {
  outline: 3px solid rgba(199, 34, 42, 0.25);
  outline-offset: 2px;
}

.paper3-topic-filter__text {
  min-width: 0;
  color: #373c43;
  font-size: 0.82rem;
  font-weight: 750;
  line-height: 1.2;
}

.paper3-results-panel {
  overflow: hidden;
}

.paper3-results-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 26px 18px;
  border-bottom: 1px solid #e8ebee;
}

.paper3-results-heading h3 {
  margin: 0;
  color: var(--paper3-ink);
  font-size: 1.55rem;
}

.paper3-results-heading p {
  margin: 5px 0 0;
  color: var(--paper3-muted);
  font-size: 0.9rem;
}

.paper3-results-count {
  flex: 0 0 auto;
  padding: 8px 12px;
  color: #555e69;
  background: #f1f3f5;
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 800;
}

.paper3-table-wrap {
  width: 100%;
  overflow-x: auto;
}

.paper3-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.paper3-table th {
  padding: 13px 16px;
  color: #656d77;
  background: #f7f8f9;
  border-bottom: 1px solid #e4e7ea;
  text-align: left;
  font-size: 0.73rem;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.paper3-table th:nth-child(1) { width: 16%; }
.paper3-table th:nth-child(2) { width: 58%; }
.paper3-table th:nth-child(3) { width: 13%; }
.paper3-table th:nth-child(4) { width: 13%; }

.paper3-table td {
  padding: 18px 16px;
  vertical-align: middle;
  border-bottom: 1px solid #eceef0;
}

.paper3-table tbody tr:last-child td {
  border-bottom: 0;
}

.paper3-table tbody tr:hover {
  background: #fcfcfd;
}

.paper3-question-name {
  display: block;
  color: #30343a;
  font-size: 1rem;
  line-height: 1.25;
}

.paper3-question-marks {
  display: block;
  margin-top: 5px;
  color: #818892;
  font-size: 0.78rem;
  font-weight: 700;
}

.paper3-topic-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.paper3-topic-chip {
  display: inline-flex;
  align-items: center;
  min-height: 27px;
  padding: 5px 9px;
  border: 1px solid;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 800;
  line-height: 1.2;
}

.paper3-topic-chip--inorganic {
  color: var(--inorganic-dark);
  background: var(--inorganic-soft);
  border-color: var(--inorganic-line);
}

.paper3-topic-chip--organic {
  color: var(--organic-dark);
  background: var(--organic-soft);
  border-color: var(--organic-line);
}

.paper3-link-cell {
  text-align: center;
}

.paper3-pdf-button,
.paper3-pdf-button:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 104px;
  padding: 9px 12px;
  border-radius: 9px;
  font-size: 0.82rem;
  font-weight: 850;
  text-decoration: none;
}

.paper3-pdf-button--question,
.paper3-pdf-button--question:visited {
  color: #ffffff;
  background: var(--paper3-red);
}

.paper3-pdf-button--question:hover {
  color: #ffffff;
  background: #a91d24;
}

.paper3-pdf-button--mark-scheme,
.paper3-pdf-button--mark-scheme:visited {
  color: #4e535a;
  background: #f0f2f4;
  border: 1px solid #d8dde2;
}

.paper3-pdf-button--mark-scheme:hover {
  color: #2f3338;
  background: #e5e8eb;
}

.paper3-empty-state {
  margin: 0;
  padding: 32px 26px;
  color: var(--paper3-muted);
  text-align: center;
}

@media (max-width: 1050px) {
  .paper3-shell {
    width: min(100% - 32px, 920px);
  }

  .paper3-panel-heading {
    grid-template-columns: 1fr auto;
  }

  .paper3-or-note {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: stretch;
    max-width: none;
  }

  .paper3-filter-groups {
    grid-template-columns: 1fr;
  }

  .paper3-table th:nth-child(1) { width: 18%; }
  .paper3-table th:nth-child(2) { width: 52%; }
  .paper3-table th:nth-child(3) { width: 15%; }
  .paper3-table th:nth-child(4) { width: 15%; }
}

@media (max-width: 760px) {
  .paper3-shell {
    width: calc(100% - 20px);
    padding-top: 24px;
  }

  .paper3-hero,
  .paper3-filter-panel {
    padding: 18px;
    border-radius: 16px;
  }

  .paper3-panel-heading {
    grid-template-columns: 1fr;
    align-items: stretch;
    gap: 10px;
  }

  .paper3-panel-heading .paper3-or-note {
    grid-column: 1;
    grid-row: auto;
  }

  .paper3-clear-button {
    justify-self: start;
  }

  .paper3-results-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .paper3-filter-grid {
    grid-template-columns: 1fr;
  }

  .paper3-results-heading {
    padding: 20px;
  }

  .paper3-results-count {
    align-self: flex-start;
  }

  .paper3-table-wrap {
    overflow: visible;
  }

  .paper3-table,
  .paper3-table tbody,
  .paper3-table tr,
  .paper3-table td {
    display: block;
    width: 100%;
  }

  .paper3-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  .paper3-table tbody {
    padding: 12px;
  }

  .paper3-table tbody tr {
    margin-bottom: 12px;
    padding: 4px 14px 14px;
    background: #ffffff;
    border: 1px solid #e1e5e9;
    border-radius: 14px;
  }

  .paper3-table tbody tr:last-child {
    margin-bottom: 0;
  }

  .paper3-table td {
    padding: 12px 0;
    border-bottom: 1px solid #eceef0;
  }

  .paper3-table td:last-child {
    border-bottom: 0;
  }

  .paper3-table td::before {
    display: block;
    margin-bottom: 7px;
    color: #818892;
    content: attr(data-label);
    font-size: 0.69rem;
    font-weight: 900;
    letter-spacing: 0.07em;
    text-transform: uppercase;
  }

  .paper3-link-cell {
    text-align: left;
  }

  .paper3-pdf-button {
    min-width: 126px;
  }
}