:root {
  --bg: #17130f;
  --bg-panel: #221c17;
  --bg-panel-raised: #2b2320;
  --border: #3a2f27;
  --text: #f1e9df;
  --muted: #b6a89a;
  --ember: #ff7a1a;
  --ember-bright: #ffab55;
  --ember-dim: #a34f14;
  --green: #6ebb5a;
  --red: #d95c4a;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: radial-gradient(ellipse at top, #2a1d14 0%, var(--bg) 55%);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.5;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--ember-bright); }
a:hover { color: var(--ember); }

.site-header {
  padding: 40px 0 24px;
  border-bottom: 1px solid var(--border);
  background:
    linear-gradient(180deg, rgba(255, 122, 26, 0.08), transparent 70%);
  text-align: center;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.75rem;
  color: var(--muted);
  margin: 0 0 6px;
}
.site-header h1 {
  margin: 0;
  font-size: 2.4rem;
  background: linear-gradient(90deg, var(--ember-bright), var(--ember));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.subtitle {
  margin: 4px 0 14px;
  color: var(--muted);
  font-size: 1.05rem;
}
.credit-line {
  font-size: 0.9rem;
  color: var(--muted);
  max-width: 640px;
  margin: 0 auto;
}

.tabs {
  display: flex;
  gap: 8px;
  margin-top: 20px;
}
.tab-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 10px 18px;
  border-radius: 8px 8px 0 0;
  cursor: pointer;
  font-size: 0.95rem;
}
.tab-btn.is-active {
  color: var(--text);
  border-color: var(--ember-dim);
  background: var(--bg-panel);
  border-bottom-color: var(--bg-panel);
}

main.wrap { padding-top: 24px; padding-bottom: 60px; }

.tab-panel { display: none; }
.tab-panel.is-active { display: block; }

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 24px;
}
.panel h2 { margin-top: 0; }
.muted { color: var(--muted); }
.small { font-size: 0.82rem; }

.panel-row.space-between {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  flex-wrap: wrap;
}

.btn-secondary, .btn-primary {
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 0.9rem;
  cursor: pointer;
  border: 1px solid var(--border);
}
.btn-secondary {
  background: var(--bg-panel-raised);
  color: var(--text);
}
.btn-secondary:hover { border-color: var(--ember-dim); }
.btn-primary {
  background: var(--ember);
  color: #1a1108;
  border-color: var(--ember);
  font-weight: 600;
}
.btn-primary:hover:not(:disabled) { background: var(--ember-bright); }
.btn-primary:disabled {
  background: var(--bg-panel-raised);
  color: var(--muted);
  border-color: var(--border);
  cursor: not-allowed;
}

.chat-panel { display: flex; flex-direction: column; }

#ai-model-select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 0.8rem;
  height: fit-content;
}

.model-status { margin-top: 16px; }
.progress-track {
  width: 100%;
  height: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--ember-dim), var(--ember-bright));
  transition: width 0.2s ease;
}
.progress-fill.indeterminate {
  width: 40% !important;
  animation: indeterminate-slide 1.1s ease-in-out infinite;
}
@keyframes indeterminate-slide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(250%); }
}
#ai-mode-status { margin-top: 6px; cursor: default; }
#ai-mode-status.clickable-retry { cursor: pointer; text-decoration: underline; }

.chat-log {
  margin-top: 16px;
  height: 360px;
  overflow-y: auto;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.chat-msg { max-width: 85%; padding: 10px 14px; border-radius: 10px; font-size: 0.92rem; white-space: pre-wrap; }
.chat-msg.user { align-self: flex-end; background: var(--ember-dim); color: #fff2e6; }
.chat-msg.bot { align-self: flex-start; background: var(--bg-panel-raised); border: 1px solid var(--border); }
.chat-msg .who { display: block; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 4px; }

.chat-form { display: flex; gap: 10px; margin-top: 14px; }
.chat-form input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 0.95rem;
}
.chat-form input:disabled {
  color: var(--muted);
  cursor: not-allowed;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}