/* ── Design tokens ───────────────────────────────────────────────────────── */
:root {
  --bg:            #ffffff;
  --bg-subtle:     #fafafa;
  --bg-card:       #ffffff;
  --bg-input:      #ffffff;
  --bg-hover:      #f5f5f5;
  --bg-blue-hover: #eff6ff;
  --text:          #1f2937;
  --text-2:        #555555;
  --text-3:        #888888;
  --text-4:        #999999;
  --text-code:     #333333;
  --border:        #e2e2e2;
  --border-sub:    #f0f0f0;
  --border-input:  #cccccc;
  --border-dim:    #dddddd;

  font-family: -apple-system, system-ui, sans-serif;
  color-scheme: light;
}

html.dark {
  --bg:            #030712;
  --bg-subtle:     #0f172a;
  --bg-card:       #1f2937;
  --bg-input:      #111827;
  --bg-hover:      #374151;
  --bg-blue-hover: #1e3a5f;
  --text:          #e5e7eb;
  --text-2:        #9ca3af;
  --text-3:        #6b7280;
  --text-4:        #4b5563;
  --text-code:     #d1d5db;
  --border:        #374151;
  --border-sub:    #1f2937;
  --border-input:  #4b5563;
  --border-dim:    #374151;

  color-scheme: dark;
}

/* ── Base ────────────────────────────────────────────────────────────────── */
html {
  background-color: var(--bg);
}

body {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  background: var(--bg-subtle);
  color: var(--text);
}

input, textarea, select, button {
  color: inherit;
}

input[type="text"],
input[type="password"],
textarea,
select {
  background: var(--bg-input);
  color: var(--text);
}

progress {
  accent-color: #2563eb;
}

/* ── Header ──────────────────────────────────────────────────────────────── */
header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

header h1 {
  font-size: 1.6rem;
  margin-bottom: 0.25rem;
}

.subtitle {
  color: var(--text-2);
  margin-top: 0;
}

.theme-btn {
  padding: 0.4rem;
  background: none;
  border: 1px solid var(--border-input);
  border-radius: 6px;
  color: var(--text-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.theme-btn:hover { background: var(--bg-hover); color: var(--text); }

.icon-sun { display: none; }
html.dark .icon-moon { display: none; }
html.dark .icon-sun  { display: block; }

/* ── Layout ──────────────────────────────────────────────────────────────── */
section {
  margin-top: 2rem;
}

.hidden {
  display: none !important;
}

#load-section {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

#search-section {
  display: flex;
  gap: 0.5rem;
}

/* ── Input tabs ──────────────────────────────────────────────────────────── */
.input-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border);
  margin-bottom: 0.25rem;
}

.tab-btn {
  background: none;
  border: none;
  border-radius: 0;
  color: var(--text-2);
  font-size: 0.9rem;
  padding: 0.35rem 0.9rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
}

.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: #2563eb; border-bottom-color: #2563eb; font-weight: 600; }

/* ── Input area ──────────────────────────────────────────────────────────── */
.input-area {
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
}

.tab-panel { flex: 1; }

#tab-paste textarea {
  width: 100%;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border-input);
  border-radius: 6px;
  font-size: 0.95rem;
  font-family: inherit;
  resize: vertical;
  box-sizing: border-box;
  background: var(--bg-input);
}

#file-input { display: none; }

.file-btn {
  display: inline-block;
  padding: 0.6rem 1rem;
  border: 1px solid var(--border-input);
  border-radius: 6px;
  font-size: 0.95rem;
  cursor: pointer;
  white-space: nowrap;
  background: var(--bg-card);
  color: var(--text);
}
.file-btn:hover { background: var(--bg-hover); }

.file-name {
  font-size: 0.88rem;
  color: var(--text-2);
  align-self: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#url-input {
  width: 100%;
  box-sizing: border-box;
}

/* ── Action row ──────────────────────────────────────────────────────────── */
.action-row {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

/* ── Status row ──────────────────────────────────────────────────────────── */
.status-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn-secondary {
  display: inline-block;
  padding: 0.6rem 1rem;
  border: 1px solid #2563eb;
  border-radius: 6px;
  background: var(--bg-card);
  color: #2563eb;
  font-size: 1rem;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  line-height: normal;
}
.btn-secondary:hover:not(:disabled) { background: var(--bg-blue-hover); }
.btn-secondary:disabled {
  border-color: #9ab3e8;
  background: #9ab3e8;
  color: white;
  cursor: not-allowed;
}

button {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 6px;
  background: #2563eb;
  color: white;
  font-size: 1rem;
  cursor: pointer;
}

button:disabled {
  background: #9ab3e8;
  cursor: not-allowed;
}

/* ── Download / progress ─────────────────────────────────────────────────── */
.download-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.download-label {
  font-size: 0.82rem;
  color: var(--text-3);
  white-space: nowrap;
  min-width: 100px;
}

#download-bar,
#download-bar-b {
  flex: 1;
  max-width: 260px;
}

.download-text {
  font-size: 0.85rem;
  color: var(--text-2);
  white-space: nowrap;
}

/* ── Inputs (global) ─────────────────────────────────────────────────────── */
input[type="text"] {
  flex: 1;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border-input);
  border-radius: 6px;
  font-size: 1rem;
}

/* ── Status messages ─────────────────────────────────────────────────────── */
.status {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-2);
}

.status.error { color: #c0392b; }

.status-b { color: var(--text-2); }

/* ── Progress bars ───────────────────────────────────────────────────────── */
.arm-pending {
  font-size: 0.88rem;
  color: var(--text-3);
  font-style: italic;
}

.progress-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.arm-label {
  width: 280px;
  font-size: 0.9rem;
}

progress {
  flex: 1;
}

/* ── Results ─────────────────────────────────────────────────────────────── */
#results-section {
  display: flex;
  gap: 1.25rem;
}

.results-column {
  flex: 1;
  min-width: 0;
}

.results-column h2 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.arm-desc {
  font-size: 0.85rem;
  color: var(--text-2);
  margin-top: 0;
}

.result-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin-bottom: 0.75rem;
}

.result-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.result-score {
  font-size: 0.8rem;
  font-weight: 600;
  color: #2563eb;
}

.result-timestamp {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-2);
  font-variant-numeric: tabular-nums;
  text-decoration: none;
}

a.result-timestamp:hover {
  color: #2563eb;
  text-decoration: underline;
}

.result-summary {
  font-size: 0.85rem;
  color: var(--text-2);
  font-style: italic;
  margin: 0.4rem 0;
}

.result-text {
  font-size: 0.9rem;
  margin: 0.3rem 0 0;
  line-height: 1.4;
}

/* ── Metrics table ───────────────────────────────────────────────────────── */
.metrics-table {
  border-collapse: collapse;
  font-size: 0.88rem;
  width: 100%;
  max-width: 500px;
}

.metrics-table th {
  text-align: left;
  padding: 0.3rem 1rem 0.3rem 0;
  color: var(--text-2);
  font-weight: 600;
  border-bottom: 1px solid var(--border-dim);
}

.metrics-table td {
  padding: 0.3rem 1rem 0.3rem 0;
}

.metrics-table td:first-child {
  font-weight: 600;
  width: 100px;
}

.metrics-sub td {
  color: var(--text-2);
  font-size: 0.83rem;
}

.metrics-note {
  font-size: 0.8rem;
  color: var(--text-3);
  margin: 0.5rem 0 0;
}

/* ── Alpha slider ────────────────────────────────────────────────────────── */
.alpha-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.alpha-label {
  font-size: 0.88rem;
  white-space: nowrap;
  min-width: 60px;
}

#alpha-slider {
  flex: 1;
  min-width: 80px;
  cursor: pointer;
}

.alpha-ends {
  display: flex;
  justify-content: space-between;
  width: 100%;
  font-size: 0.75rem;
  color: var(--text-3);
  margin-top: -0.4rem;
}

/* ── Details panels (shared) ─────────────────────────────────────────────── */
#prompt-settings,
#model-settings,
#cache-manager {
  margin-top: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0 0.75rem;
}

#prompt-settings summary,
#model-settings summary,
#cache-manager summary {
  padding: 0.5rem 0;
  cursor: pointer;
  font-size: 0.88rem;
  color: var(--text-2);
  user-select: none;
}

#prompt-settings summary:hover,
#model-settings summary:hover,
#cache-manager summary:hover { color: var(--text); }

/* ── Prompt settings ─────────────────────────────────────────────────────── */
.prompt-config {
  display: flex;
  gap: 1rem;
  padding-bottom: 0.75rem;
}

.prompt-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.prompt-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.prompt-arm-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-2);
  min-width: 40px;
}

.prompt-header select {
  font-size: 0.82rem;
  padding: 0.2rem 0.4rem;
  border: 1px solid var(--border-input);
  border-radius: 4px;
  background: var(--bg-input);
  cursor: pointer;
}

.prompt-group textarea {
  font-family: ui-monospace, monospace;
  font-size: 0.78rem;
  line-height: 1.45;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border-input);
  border-radius: 6px;
  resize: vertical;
  color: var(--text-code);
  background: var(--bg-subtle);
}

.prompt-group textarea:focus {
  outline: none;
  border-color: #2563eb;
  background: var(--bg-input);
}

/* ── Model settings ──────────────────────────────────────────────────────── */
.model-config {
  display: flex;
  gap: 1.5rem;
  padding-bottom: 0.75rem;
}

.model-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.model-section-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-code);
}

.model-section-note {
  font-weight: 400;
  color: var(--text-4);
}

.model-opts {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.model-opt {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  cursor: pointer;
  padding: 0.18rem 0.3rem;
  border-radius: 4px;
}

.model-opt:hover { background: var(--bg-hover); }

.model-opt input[type="radio"] {
  flex-shrink: 0;
  margin: 0;
  cursor: pointer;
}

.model-opt-name {
  font-size: 0.82rem;
  font-family: ui-monospace, monospace;
  color: var(--text);
  white-space: nowrap;
}

.model-opt-meta {
  font-size: 0.77rem;
  color: var(--text-3);
}

.llm-mode-toggle {
  display: flex;
  border: 1px solid var(--border-input);
  border-radius: 5px;
  overflow: hidden;
  align-self: flex-start;
}

.mode-btn {
  padding: 0.28rem 0.7rem;
  font-size: 0.82rem;
  background: var(--bg-card);
  border: none;
  border-radius: 0;
  color: var(--text-2);
  cursor: pointer;
}

.mode-btn + .mode-btn { border-left: 1px solid var(--border-input); }
.mode-btn.active { background: #2563eb; color: white; }
.mode-btn:hover:not(.active) { background: var(--bg-hover); }

/* ── Server panel ────────────────────────────────────────────────────────── */
.server-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.3rem;
}

.server-field-label {
  font-size: 0.79rem;
  color: var(--text-2);
  min-width: 78px;
  flex-shrink: 0;
}

.server-row input[type="text"],
.server-row input[type="password"],
.server-row select {
  flex: 1;
  padding: 0.32rem 0.5rem;
  border: 1px solid var(--border-input);
  border-radius: 4px;
  font-size: 0.82rem;
  font-family: inherit;
  background: var(--bg-input);
}

.btn-test {
  padding: 0.3rem 0.7rem;
  font-size: 0.82rem;
  background: var(--bg-card);
  border: 1px solid var(--border-input);
  border-radius: 4px;
  color: var(--text-code);
  cursor: pointer;
  white-space: nowrap;
}

.btn-test:hover { background: var(--bg-hover); }

.server-test-result {
  font-size: 0.8rem;
  color: var(--text-2);
}

.server-test-result.ok  { color: #16a34a; }
.server-test-result.err { color: #c0392b; }

/* ── Cache manager ───────────────────────────────────────────────────────── */
#cache-list {
  padding-bottom: 0.6rem;
}

.cache-entry {
  display: grid;
  grid-template-columns: auto 1fr auto auto auto;
  align-items: center;
  gap: 0.65rem;
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--border-sub);
}

.cache-entry:last-child { border-bottom: none; }

.cache-delete-btn {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  padding: 0.25rem 0.3rem;
  background: none;
  border: 1px solid transparent;
  border-radius: 4px;
  color: var(--text-3);
  cursor: pointer;
  line-height: 1;
}

.cache-delete-btn:hover:not(:disabled) {
  color: #c0392b;
  border-color: #fca5a5;
  background: #fef2f2;
}

.cache-delete-btn:disabled {
  color: var(--border-input);
  cursor: not-allowed;
}

.cache-entry-label {
  font-size: 0.83rem;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.cache-entry-models {
  font-size: 0.78rem;
  font-family: ui-monospace, monospace;
  color: var(--text-2);
  white-space: nowrap;
}

.cache-entry-chunks {
  font-size: 0.78rem;
  color: var(--text-3);
  white-space: nowrap;
}

.cache-entry-status {
  font-size: 0.75rem;
  color: var(--text-3);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.cache-empty {
  font-size: 0.84rem;
  color: var(--text-4);
  font-style: italic;
  margin: 0.4rem 0 0.2rem;
}