:root {
  color-scheme: light;
  --ink: #17211c;
  --muted: #5d6a63;
  --paper: #f6f7f2;
  --panel: #ffffff;
  --line: #d9dfd8;
  --accent: #245c46;
  --accent-strong: #163f2f;
  --accent-soft: #e7f0ea;
  --mark: #fff0a8;
  --shadow: 0 12px 32px rgba(26, 48, 37, 0.08);
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    linear-gradient(rgba(36, 92, 70, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 92, 70, 0.025) 1px, transparent 1px),
    var(--paper);
  background-size: 24px 24px;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", "Noto Sans JP", sans-serif;
  line-height: 1.7;
}

button,
input,
select {
  font: inherit;
}

button,
select {
  cursor: pointer;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 8px 12px;
  color: white;
  background: var(--accent-strong);
  border-radius: 8px;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  color: white;
  background: linear-gradient(135deg, #183d2f 0%, #2c6a50 100%);
  border-bottom: 4px solid #a9c5b7;
}

.header-inner,
.page-shell {
  width: min(1120px, calc(100% - 32px));
  margin-inline: auto;
}

.header-inner {
  padding: 54px 0 48px;
}

.eyebrow {
  margin: 0 0 6px;
  color: #cce0d5;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.18em;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 8px;
  font-family: Georgia, "Yu Mincho", serif;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: 0.02em;
}

.lead {
  max-width: 680px;
  margin-bottom: 8px;
  color: #edf6f1;
}

.data-status {
  margin-bottom: 0;
  color: #cce0d5;
  font-size: 0.9rem;
}

.page-shell {
  padding: 32px 0 56px;
}

.search-panel,
.result-section {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.search-panel {
  padding: clamp(20px, 4vw, 34px);
}

.search-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 800;
}

.search-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

input[type="search"],
select {
  width: 100%;
  color: var(--ink);
  background: white;
  border: 1px solid #b8c3bc;
  border-radius: 10px;
  outline: none;
}

input[type="search"] {
  min-height: 52px;
  padding: 12px 14px;
  font-size: 1.05rem;
}

select {
  min-height: 44px;
  padding: 8px 34px 8px 10px;
}

input:focus-visible,
select:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(36, 92, 70, 0.28);
  outline-offset: 2px;
}

.field-hint,
.result-summary,
.page-size-label,
.meta,
.anchor-label,
.site-footer {
  color: var(--muted);
  font-size: 0.9rem;
}

.field-hint {
  margin: 8px 0 22px;
}

.filters-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  align-items: end;
}

.filters-grid label:not(.checkbox-label) {
  display: grid;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 700;
}

.checkbox-label {
  display: flex;
  min-height: 44px;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--accent-soft);
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 700;
}

.checkbox-label input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.primary-button,
.secondary-button,
.load-more-button,
.text-button {
  border-radius: 10px;
  font-weight: 800;
}

.primary-button {
  min-width: 116px;
  padding: 10px 20px;
  color: white;
  background: var(--accent);
  border: 1px solid var(--accent);
}

.primary-button:hover {
  background: var(--accent-strong);
}

.secondary-button,
.load-more-button {
  padding: 9px 16px;
  color: var(--accent-strong);
  background: white;
  border: 1px solid #9eb3a8;
}

.secondary-button:hover,
.load-more-button:hover {
  background: var(--accent-soft);
}

.text-button {
  padding: 9px 12px;
  color: var(--muted);
  background: transparent;
  border: 1px solid transparent;
}

.text-button:hover {
  color: var(--accent-strong);
  text-decoration: underline;
}

.result-section {
  margin-top: 22px;
  padding: clamp(18px, 3vw, 28px);
}

.result-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: end;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.result-toolbar h2 {
  margin-bottom: 2px;
  font-size: 1.35rem;
}

.result-summary {
  margin-bottom: 0;
}

.page-size-label {
  display: grid;
  min-width: 110px;
  gap: 4px;
}

.results {
  display: grid;
  gap: 14px;
  padding-top: 18px;
}

.result-card {
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 5px solid #91b3a2;
  border-radius: 12px;
}

.result-card:hover {
  border-left-color: var(--accent);
  box-shadow: 0 8px 20px rgba(26, 48, 37, 0.07);
}

.card-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 10px;
}

.thread-title {
  margin: 0;
  font-size: 1rem;
  line-height: 1.5;
}

.thread-title a,
.post-link {
  color: var(--accent-strong);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.score-badge {
  flex: 0 0 auto;
  padding: 3px 8px;
  color: #365947;
  background: var(--accent-soft);
  border-radius: 999px;
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  margin-bottom: 10px;
}

.meta span:not(:last-child)::after {
  margin-left: 12px;
  color: #bac4be;
  content: "·";
}

.post-content,
.anchor-content {
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.post-content {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic UI", sans-serif;
  font-size: 1rem;
}

mark {
  padding: 0 0.08em;
  color: inherit;
  background: var(--mark);
  border-radius: 3px;
}

.anchor-box {
  margin-top: 14px;
  padding: 12px 14px;
  background: #f5f8f6;
  border: 1px solid #dde7e1;
  border-radius: 9px;
}

.anchor-label {
  margin-bottom: 4px;
  font-weight: 800;
}

.anchor-content {
  margin-bottom: 8px;
  font-size: 0.93rem;
}

.anchor-content:last-child {
  margin-bottom: 0;
}

.card-footer {
  display: flex;
  justify-content: flex-end;
  margin-top: 12px;
}

.post-link {
  font-size: 0.85rem;
}

.empty-state,
.notice {
  padding: 34px 18px;
  text-align: center;
  color: var(--muted);
  background: #fafbf9;
  border: 1px dashed #bec9c2;
  border-radius: 12px;
}

.load-more-button {
  display: block;
  min-width: 180px;
  margin: 22px auto 0;
}

.load-more-button[hidden] {
  display: none;
}

.site-footer {
  padding: 24px 16px 40px;
  text-align: center;
}

.site-footer p {
  margin-bottom: 0;
}

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

@media (max-width: 760px) {
  .header-inner {
    padding: 38px 0 34px;
  }

  .search-row,
  .filters-grid {
    grid-template-columns: 1fr;
  }

  .primary-button {
    min-height: 48px;
  }

  .result-toolbar {
    align-items: flex-start;
  }

  .card-head {
    display: block;
  }

  .score-badge {
    display: inline-block;
    margin-top: 6px;
  }
}

@media (max-width: 520px) {
  .header-inner,
  .page-shell {
    width: min(100% - 20px, 1120px);
  }

  .result-toolbar {
    display: grid;
  }

  .page-size-label {
    width: 100%;
  }

  .meta {
    display: grid;
    gap: 2px;
  }

  .meta span:not(:last-child)::after {
    content: none;
  }
}