:root {
  --bg: #0b0d10;
  --panel: #14181d;
  --fg: #e6e6e6;
  --muted: #8a8f97;
  --accent: #5b9bd5;
  --border: #2a2f36;
  --danger: #d96666;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--fg);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

header h1 {
  margin: 0 0 0.75rem 0;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--muted);
}

.tabs { display: flex; gap: 0.5rem; }

.tab {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  font-size: 0.9rem;
}

.tab.active {
  color: var(--fg);
  border-color: var(--accent);
}

main { flex: 1; padding: 1.5rem; }

.panel { display: none; max-width: 900px; margin: 0 auto; }
.panel.active { display: block; }

.model-row {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.model-row label {
  display: flex;
  flex-direction: column;
  font-size: 0.8rem;
  color: var(--muted);
  gap: 0.25rem;
  flex: 1;
  min-width: 200px;
}

select, input[type="text"], input[type="file"], textarea {
  background: var(--panel);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.5rem;
  font-family: inherit;
  font-size: 0.95rem;
}

textarea { width: 100%; resize: vertical; }

button {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 4px;
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-size: 0.95rem;
}

button:disabled { opacity: 0.5; cursor: not-allowed; }

#chat-messages {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  min-height: 300px;
  max-height: 60vh;
  overflow-y: auto;
  padding: 1rem;
  margin-bottom: 1rem;
  white-space: pre-wrap;
}

.msg { margin-bottom: 1rem; }
.msg-role { font-size: 0.75rem; color: var(--muted); margin-bottom: 0.25rem; }
.msg-body { }

#chat-form, #image-form, #transcribe-form {
  display: flex;
  gap: 0.5rem;
  align-items: flex-end;
}

#chat-form textarea, #image-form textarea { flex: 1; }

#image-output img {
  max-width: 100%;
  border-radius: 6px;
  margin-top: 1rem;
}

#transcribe-output {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
  margin-top: 1rem;
  white-space: pre-wrap;
  min-height: 3rem;
}

footer {
  border-top: 1px solid var(--border);
  padding: 0.5rem 1.5rem;
  font-size: 0.8rem;
  color: var(--muted);
}

#usage-toggle {
  background: transparent;
  color: var(--muted);
  border: none;
  cursor: pointer;
  padding: 0.25rem 0;
}

#usage-detail { margin-top: 0.5rem; }

#usage-table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.85rem;
}

#usage-table th, #usage-table td {
  text-align: left;
  padding: 0.35rem 0.5rem;
  border-bottom: 1px solid var(--border);
}

#usage-table th { color: var(--muted); font-weight: normal; }

#toasts {
  position: fixed;
  top: 1rem;
  right: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 1000;
}

.toast {
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  padding: 0.6rem 0.9rem;
  font-size: 0.9rem;
  max-width: 380px;
}

.toast.error { border-left-color: var(--danger); }