/* Dark palette */
:root {
  /* brand */
  --sand:   #ceb992;
  --sage:   #73937e;
  --slate:  #585563;
  --plum:   #5b2e48;
  --oxblood:#471323;

  /* surfaces */
  --bg:      #111014;
  --surface: #15131a;
  --panel:   #1a1821;

  /* text */
  --text:   #e8e6e3;
  --text-2: #cfcdd6;
  --muted:  #a7a5af;

  /* lines and effects */
  --border: #2b2834;
  --card-b: #2b2834;
  --ring:   rgba(115,147,126,0.35); /* sage glow */

  /* helpers */
  --sand-rgb: 206,185,146;
}

* { box-sizing: border-box; }
html, body { height: 100%; color-scheme: dark; }

body {
  margin: 24px auto;
  padding: 0 18px;
  max-width: 1100px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
}

/* Header */
.page-header h1 {
  margin: 0 0 4px 0;
  font-size: 28px;
  letter-spacing: -0.01em;
  color: var(--sand);
}
.sub {
  color: var(--muted);
  margin: 0 0 18px 0;
  font-size: 14px;
}

/* Top nav */
.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 0 0 14px 0;
}
.topnav a {
  text-decoration: none;
  color: var(--text-2);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.01em;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}
.topnav a:hover { border-color: rgba(var(--sand-rgb), 0.65); color: var(--sand); }
.topnav a:focus-visible { outline: 3px solid var(--ring); outline-offset: 2px; }
.topnav a.active {
  border-color: rgba(115,147,126,0.85);
  background: rgba(115,147,126,0.18);
  color: var(--text);
}

.muted { color: var(--muted); }

/* Panels and layout */
.panel {
  border: 1px solid var(--card-b);
  border-radius: 12px;
  padding: 14px;
  margin: 12px 0;
  background: var(--panel);
  box-shadow: 0 1px 0 rgba(0,0,0,0.35), 0 12px 30px rgba(0,0,0,0.35);
}

.searchbar {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  align-items: center;
}

.pref-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 10px;
}

details > summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--sand);
  list-style: none;
}
details > summary::-webkit-details-marker { display: none; }

/* Inputs */
input[type="text"], input[type="number"], textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  font: inherit;
  color: var(--text);
  outline: none;
}
textarea { min-height: 100px; }

input::placeholder, textarea::placeholder { color: var(--muted); }

input:focus, textarea:focus {
  border-color: var(--sage);
  box-shadow: 0 0 0 3px var(--ring);
}

.field {
  display: grid;
  grid-auto-flow: row;
  gap: 6px;
  align-items: center;
  font-size: 13px;
  color: var(--muted);
}
.field > input { min-width: 90px; }

/* Buttons */
.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
}
.btn:hover { border-color: var(--sand); }
.btn:focus-visible { outline: 3px solid var(--ring); outline-offset: 2px; }

.btn-primary {
  background: var(--sage);
  border-color: var(--sage);
  color: #ffffff;
}
.btn-primary:hover { background: var(--plum); border-color: var(--plum); }

.btn-ghost {
  background: transparent;
  color: var(--sand);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--sand); }

.toolbar {
  display: flex;
  gap: 12px;
  align-items: center;
}
.toolbar.wrap { flex-wrap: wrap; }

.hint { color: var(--muted); font-size: 12px; }

/* Results */
.status {
  min-height: 20px;
  margin: 8px 0 4px 0;
  color: var(--muted);
}

.results { margin-top: 6px; }

.card {
  border: 1px solid var(--card-b);
  border-radius: 14px;
  padding: 14px;
  margin: 12px 0;
  background: var(--panel);
  box-shadow: 0 1px 0 rgba(0,0,0,0.35), 0 12px 30px rgba(0,0,0,0.35);
}

.card-head .title {
  font-weight: 700;
  text-decoration: none;
  color: var(--sand);
}
.card-head .title:hover { color: var(--sage); text-decoration: underline; }

.meta {
  color: var(--muted);
  font-size: 13px;
  margin-top: 2px;
}

.abstract {
  margin: 10px 0 8px 0;
  font-size: 15px;
  color: var(--text-2);
  display: -webkit-box;
  -webkit-line-clamp: 6;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.cats { margin: 6px 0 8px 0; }
.pill {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--sand);
  border-radius: 999px;
  margin: 0 6px 6px 0;
  font-size: 12px;
  color: var(--sand);
  background: rgba(var(--sand-rgb), 0.13);
}

.score {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
}

/* Blog/post content */
.post-summary { margin: 10px 0 0 0; color: var(--text-2); }
.post-content { color: var(--text-2); }
.post-content a { color: var(--sage); text-decoration: none; }
.post-content a:hover { color: var(--sand); text-decoration: underline; }
.post-content h1, .post-content h2, .post-content h3, .post-content h4 {
  color: var(--text);
  margin: 18px 0 10px 0;
  letter-spacing: -0.01em;
}
.post-content {
  overflow-wrap: anywhere;
  word-break: break-word;
}
.post-content p { margin: 10px 0; }
.post-content ul, .post-content ol { margin: 10px 0 10px 22px; }
.post-content code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.95em;
  padding: 2px 6px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(var(--sand-rgb), 0.10);
  color: var(--text);
}
.post-content pre {
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: hidden;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
}
.post-content pre code {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text);
}
.post-content blockquote {
  margin: 12px 0;
  padding: 6px 12px;
  border-left: 3px solid var(--sage);
  background: rgba(255,255,255,0.02);
  color: var(--text-2);
}
.post-pre {
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: hidden;
  padding: 0;
  border-radius: 0;
  border: 0;
  background: transparent;
  color: var(--text-2);
}
/* ---------- Mobile + small screens ---------- */

/* Allow grid children to shrink instead of overflowing */
.results, .searchbar, .pref-grid, .toolbar { min-width: 0; }

/* Fluid typography for key elements */
.page-header h1 { font-size: clamp(22px, 5vw, 28px); }
.abstract       { font-size: clamp(14px, 1.8vw, 15px); }

/* Touch target sizing */
.btn,
input[type="text"],
input[type="number"],
textarea { min-height: 44px; }

/* Medium screens */
@media (max-width: 900px) {
  body { margin: 16px; }
  .panel, .card { padding: 12px; }
  .pref-grid { grid-template-columns: 1fr; } /* stack likes/dislikes */
}

/* Small screens */
@media (max-width: 720px) {
  /* Stack search controls */
  .searchbar {
    grid-template-columns: 1fr;
    grid-auto-rows: auto;
    gap: 8px;
  }
  .searchbar input[type="text"],
  .searchbar .btn,
  .searchbar .field { width: 100%; }

  /* Wrap global controls cleanly */
  .toolbar.wrap { gap: 10px; }
  .field > input { min-width: 0; } /* allow numeric inputs to shrink */
}

/* Very small screens */
@media (max-width: 480px) {
  body { margin: 12px; }
  .card { margin: 10px 0; }
  .cats { margin-top: 4px; }
  /* Keep primary actions easy to tap in dense toolbars */
  #rankBtn, #searchBtn { width: 100%; }
}

/* Prevent overflow from long math/URLs */
.results, .card, .abstract {
  word-break: break-word;
  overflow-wrap: anywhere;
}

/* KaTeX: avoid horizontal spill on phones */
.katex-display {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 2px;
}