:root {
  --bg: #f4f1ec;
  --card-bg: #ffffff;
  --text: #1a1a1a;
  --text-light: #5f5a52;
  --accent: #b34233;
  --accent-hover: #8f3126;
  --border: #d7d0c3;
  --tag-gemini: #1a6b4a;
  --tag-gemini-bg: #e0f2ea;
  --tag-gpt: #4a3b8f;
  --tag-gpt-bg: #eae6f7;
  --radius: 6px;
  --radius-card: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Source Sans 3', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* Visually hide an element while keeping it available to screen readers */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Keyboard focus styles (mouse clicks won't trigger this) */
button:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ── Header ── */
header {
  background: var(--text);
  color: var(--bg);
  border-bottom: 4px solid var(--accent);
}
.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 0;
}
.home-link {
  display: inline-block;
  margin-bottom: 0.5rem;
  color: var(--bg);
  opacity: 0.7;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  transition: opacity 0.15s;
}
.home-link:hover,
.home-link:focus-visible { opacity: 1; }

header h1 {
  font-family: 'DM Serif Display', serif;
  font-size: 1.8rem;
  font-weight: 400;
  letter-spacing: 0.02em;
}

/* ── Tabs ── */
.tabs {
  display: flex;
  gap: 0.25rem;
  margin-top: 0.75rem;
}
.tab {
  background: transparent;
  border: none;
  color: var(--bg);
  opacity: 0.55;
  padding: 0.55rem 1rem;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border-bottom: 3px solid transparent;
  margin-bottom: -4px; /* overlap the header's accent line so active tab connects to it */
  transition: opacity 0.15s, border-color 0.15s;
}
.tab:hover { opacity: 0.85; }
.tab.active {
  opacity: 1;
  border-bottom-color: var(--accent);
}

/* ── View containers ── */
.view[hidden] { display: none; }

/* ── Controls bar ── */
.controls {
  max-width: 960px;
  margin: 1.5rem auto;
  padding: 0 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.search-box {
  flex: 1 1 260px;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--card-bg);
}
.search-box:focus { outline: 2px solid var(--accent); border-color: transparent; }

select,
.preset-toggle button {
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}

select {
  padding: 0.55rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
}

.preset-wrap {
  position: relative;
}

.date-range {
  position: absolute;
  top: calc(100% + 0.4rem);
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.6rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 4px 14px rgba(0,0,0,0.12);
  white-space: nowrap;
}
.date-range[hidden] { display: none; }

.date-input {
  padding: 0.5rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--text);
}
.date-input:focus { outline: 2px solid var(--accent); border-color: transparent; }

.date-sep {
  font-size: 0.95rem;
  color: var(--text-light);
}

.preset-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.preset-toggle button {
  padding: 0.5rem 0.7rem;
  border: none;
  background: var(--card-bg);
  color: var(--text-light);
  font-weight: 600;
  transition: background 0.15s, color 0.15s;
}
.preset-toggle button + button { border-left: 1px solid var(--border); }
.preset-toggle button.active {
  background: var(--text);
  color: var(--bg);
}

/* ── Status line ── */
.status {
  max-width: 960px;
  margin: 0 auto 0.75rem;
  padding: 0 1.5rem;
  font-size: 0.85rem;
  color: var(--text-light);
}

/* ── Cards ── */
.card-list {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow);
  transition: box-shadow 0.15s;
}
.card:hover { box-shadow: 0 3px 10px rgba(0,0,0,0.09); }

.card-title {
  font-family: 'DM Serif Display', serif;
  font-size: 1.2rem;
  line-height: 1.35;
  margin-bottom: 0.4rem;
}
.card-title a {
  color: var(--text);
  text-decoration: none;
}
.card-title a:hover { color: var(--accent); }

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.85rem;
  align-items: center;
  margin-bottom: 0.55rem;
}

.publication {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent);
}

.pub-date {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.source-tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  font-weight: 600;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.source-tag.gemini { background: var(--tag-gemini-bg); color: var(--tag-gemini); }
.source-tag.gpt    { background: var(--tag-gpt-bg);    color: var(--tag-gpt); }

.card-summary {
  font-size: 0.92rem;
  color: var(--text-light);
  line-height: 1.6;
}

.card-footer {
  margin-top: 0.85rem;
  padding-top: 0.55rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.imported-date {
  font-size: 0.72rem;
  color: var(--text-light);
  font-style: italic;
  opacity: 0.75;
}

/* ── Pagination ── */
.pagination {
  max-width: 960px;
  margin: 0 auto 2rem;
  padding: 0 1.5rem;
  display: flex;
  justify-content: center;
  gap: 0.35rem;
}
.pagination button {
  font-family: inherit;
  font-size: 0.85rem;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  cursor: pointer;
  color: var(--text);
}
.pagination button.active {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}
.pagination button:disabled { opacity: 0.4; cursor: default; }

/* ── Loading / empty states ── */
.message {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-light);
  font-size: 1rem;
}

@media (max-width: 600px) {
  .header-inner { padding: 1rem 1rem 0; }
  .controls { padding: 0 1rem; }
  .card-list { padding: 0 1rem 1.5rem; }
  .card { padding: 1rem; }
  .card-title { font-size: 1.05rem; }
}

/* ── Statistics view ── */
.stats-summary {
  max-width: 960px;
  margin: 0 auto 1.5rem;
  padding: 0 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 2.25rem;
}

.stat-block {
  display: flex;
  flex-direction: column;
}
.stat-number {
  font-family: 'DM Serif Display', serif;
  font-size: 1.9rem;
  font-weight: 400;
  color: var(--accent);
  line-height: 1.1;
}
.stat-label {
  font-size: 0.82rem;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stats-block {
  max-width: 960px;
  margin: 0 auto 1.75rem;
  padding: 0 1.5rem;
}
.section-heading {
  font-family: 'DM Serif Display', serif;
  font-size: 1.15rem;
  font-weight: 400;
  margin-bottom: 0.65rem;
}

.chart-empty {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--text-light);
}

/* Daily bar chart (vertical bars) */
.chart-daily {
  display: flex;
  align-items: stretch;
  gap: 0.55rem;
  padding: 1rem 1.25rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  overflow-x: auto;
}

.bar-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 0 0 52px;
}
.bar-count {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.25rem;
}
.bar-area {
  height: 180px;
  width: 100%;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.bar-fill {
  width: 70%;
  min-height: 2px;
  background: var(--accent);
  border-radius: 3px 3px 0 0;
  transition: height 0.2s;
}
.bar-label {
  font-size: 0.72rem;
  color: var(--text-light);
  margin-top: 0.4rem;
  white-space: nowrap;
}

/* Publications chart (horizontal bars) */
.chart-publications {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem 1.25rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
}

.bar-row {
  display: grid;
  grid-template-columns: minmax(120px, 220px) 1fr 42px;
  gap: 0.85rem;
  align-items: center;
}
.bar-row-label {
  font-size: 0.88rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.bar-row-track {
  height: 14px;
  background: var(--bg);
  border-radius: 7px;
  overflow: hidden;
}
.bar-row-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 7px;
  transition: width 0.2s;
}
.bar-row-count {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  text-align: right;
}