/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #fafaf7;
  --card-bg: #ffffff;
  --text: #1a1a1a;
  --text-secondary: #6b6b6b;
  --border: #e0ddd5;
  --accent: #2d5f2d;
  --accent-hover: #1e4a1e;
  --danger: #b33;
  --danger-light: #fef0f0;
  --success: #2d5f2d;
  --success-light: #f0fef0;
  --shadow: 0 1px 3px rgba(0,0,0,0.06);
  --radius: 6px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  max-width: 720px;
  margin: 0 auto;
  padding: 16px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- Header --- */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  border-bottom: 2px solid var(--text);
  margin-bottom: 24px;
}

.site-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.header-nav { display: flex; gap: 12px; align-items: center; }
.header-nav a { font-size: 0.85rem; color: var(--text-secondary); }
.header-nav a:hover { color: var(--text); }

#settings-btn {
  background: none;
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
#settings-btn:hover { border-color: var(--text-secondary); }

/* --- PAT Banner --- */
.pat-banner {
  background: #fff8e1;
  border: 1px solid #f0e0a0;
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  margin-bottom: 16px;
}
.pat-banner button {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  text-decoration: underline;
  font-size: 0.85rem;
}

/* --- Settings Panel --- */
.settings-panel {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}
.settings-panel h3 { margin-bottom: 12px; font-size: 1rem; }
.settings-panel label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
  margin-top: 12px;
}
.settings-panel input {
  width: 100%;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
}
.settings-panel .hint {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 2px;
}
#save-settings {
  margin-top: 16px;
  padding: 8px 20px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
}
#save-settings:hover { background: var(--accent-hover); }

/* --- Section Headers --- */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.section-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
}
#maybe-toggle {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 0.85rem;
}

/* --- Article Cards --- */
.article-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  transition: border-color 0.15s;
}
.article-card:hover { border-color: #c0bdb5; }

.article-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.article-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 8px;
}
.article-title a { color: var(--text); }
.article-title a:hover { color: var(--accent); }

.article-summary {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 10px;
}

/* --- Actions --- */
.article-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
}

.btn-downvote, .btn-upvote {
  background: none;
  border: 1px solid var(--border);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}
.btn-downvote:hover { border-color: var(--danger); color: var(--danger); background: var(--danger-light); }
.btn-upvote:hover { border-color: var(--success); color: var(--success); background: var(--success-light); }
.btn-upvote.upvoted { border-color: var(--success); color: var(--success); background: var(--success-light); }

/* --- Topic Popover --- */
.topic-popover {
  position: absolute;
  left: 40px;
  bottom: 0;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  z-index: 10;
}
.popover-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  white-space: nowrap;
}
.topic-chip {
  background: #f5f3ee;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3px 10px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.15s;
}
.topic-chip:hover { background: var(--danger-light); border-color: var(--danger); color: var(--danger); }
.topic-chip-include:hover { background: var(--success-light); border-color: var(--success); color: var(--success); }
.topic-chip.excluded { background: var(--danger-light); border-color: var(--danger); color: var(--danger); opacity: 0.6; }
.topic-chip.included { background: var(--success-light); border-color: var(--success); color: var(--success); opacity: 0.6; }

/* --- Custom Topic Input --- */
.custom-topic-input {
  display: flex;
  align-items: center;
  gap: 4px;
}
.topic-text-input {
  width: 110px;
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.75rem;
}
.topic-text-input:focus { outline: none; border-color: var(--accent); }
.topic-submit-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2px 6px;
  font-size: 0.75rem;
  cursor: pointer;
  color: var(--text-secondary);
}
.topic-submit-btn:hover { border-color: var(--accent); color: var(--accent); }

/* --- Article Groups --- */
.article-group {
  margin-bottom: 12px;
}
.article-group .article-card {
  margin-bottom: 0;
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}
.article-group .related-section {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  padding: 8px 20px;
  box-shadow: var(--shadow);
}
.related-toggle {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 0.8rem;
  padding: 0;
}
.related-toggle:hover { text-decoration: underline; }

.related-list {
  padding-top: 8px;
}
.related-article {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 6px 0;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
}
.related-article a {
  color: var(--text);
  font-weight: 500;
  flex: 1;
}
.related-article a:hover { color: var(--accent); }
.related-source {
  color: var(--text-secondary);
  font-size: 0.75rem;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

/* --- Maybe Section --- */
#maybe-section {
  margin-top: 32px;
  display: none;
}

/* --- Empty State --- */
.empty-message {
  text-align: center;
  color: var(--text-secondary);
  font-style: italic;
  padding: 32px 0;
}

/* --- History Page --- */
.search-bar {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  margin-bottom: 16px;
}
.search-bar:focus { outline: none; border-color: var(--accent); }

.history-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.history-item:last-child { border-bottom: none; }
.history-title { font-weight: 600; font-size: 0.95rem; margin-bottom: 4px; }
.history-title a { color: var(--text); }
.history-title a:hover { color: var(--accent); }
.history-meta { font-size: 0.78rem; color: var(--text-secondary); margin-bottom: 4px; }
.history-summary { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; }

/* --- Utilities --- */
.hidden { display: none !important; }

/* --- Responsive --- */
@media (max-width: 600px) {
  body { padding: 12px; }
  .site-title { font-size: 1.35rem; }
  .article-card { padding: 12px 14px; }
  .article-title { font-size: 1rem; }
  .topic-popover { left: 0; bottom: 36px; }
}