:root { color-scheme: light dark; }

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial,
    "Apple Color Emoji", "Segoe UI Emoji";
  background: #0b0b0b;
  color: #e5e7eb;
  line-height: 1.6;
}

/* ---------- Layout ---------- */

header {
  padding: 16px;
  border-bottom: 1px solid #222;
  background: #111;
}

header h1 {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
}

main {
  max-width: 900px;
  margin: 32px auto;
  padding: 0 16px;
}

.container {
  max-width: 900px;
  margin: 0 auto;
}

/* ---------- Cards ---------- */

.card {
  background: #111;
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: 0 10px 20px rgba(0,0,0,0.4);
}

.card h2 {
  margin-top: 0;
  font-size: 18px;
  font-weight: 600;
}

/* ---------- Dropzone ---------- */

#dropzone {
  border: 2px dashed #666;
  border-radius: 10px;
  padding: 28px;
  text-align: center;
  margin-bottom: 12px;
}

#dropzone.hover {
  border-color: #dc2626;
  background: rgba(220,38,38,0.08);
}

/* ---- HARD RESET FOR HF / CHROMIUM ---- */

button,
.btn {
  appearance: none;
  -webkit-appearance: none;
  background-image: none;
}

/* Force colors (HF overrides without !important) */
.btn {
  background-color: #dc2626 !important;   /* RED */
  color: #ffffff !important;
}

button.primary {
  background-color: #2563eb !important;   /* BLUE */
  color: #ffffff !important;
}

button.secondary {
  background-color: #2563eb !important;   /* BLUE */
  color: #ffffff !important;
}

/* ---------- Buttons ---------- */

/* Choose files */
.btn {
  display: inline-block;
  padding: 8px 14px;
  background: #dc2626;
  color: #ffffff;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  text-decoration: none;
}

.btn:hover {
  background: #b91c1c;
}

/* Generic button */
button {
  padding: 10px 14px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-size: 14px;
}

/* Upload & Index */
button.primary {
  background: #2563eb;
  color: #ffffff;
}

button.primary:hover {
  background: #1d4ed8;
}

/* Send */
button.secondary {
  background: #2563eb;    
  color: #ffffff;        
}

button.secondary:hover {
  background: #1d4ed8;
}

button:disabled {
  opacity: 1;
  filter: brightness(0.7);
  cursor: not-allowed;
}

/* ---------- Hints ---------- */

.hint {
  font-size: 12px;
  opacity: .75;
  margin: 8px 0;
}

/* ---------- Messages ---------- */

.messages {
  height: 420px;
  border: 1px solid #333;
  border-radius: 8px;
  padding: 10px;
  overflow: auto;
  background: #0f0f0f;
}

.bubble {
  max-width: 80%;
  padding: 10px 12px;
  margin: 8px 0;
  border-radius: 12px;
  white-space: pre-wrap;
}

.bubble.user {
  margin-left: auto;
  background: #1e90ff;
  color: #ffffff;
}

.bubble.assistant {
  margin-right: auto;
  background: #6b0000;
  color: #ffffff;
}

/* ---------- Composer ---------- */

.composer {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  align-items: center;
}

#message-input {
  flex: 1;
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #333;
  background: #111;
  color: #e5e7eb;
  resize: vertical;
}

/* ---------- Toast ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%);
  background: #111827;
  color: white;
  padding: 8px 12px;
  border-radius: 6px;
  opacity: 0;
  transition: opacity .3s;
}

/* ---------- Footer ---------- */

.footer {
  text-align: center;
  font-size: 12px;
  color: #9ca3af;
  margin-top: 40px;
}