:root {
  --ink: #1d1b19;
  --paper: #f4f1ea;
  --accent: #c46b3b;
  --accent-dark: #8c3e1a;
  --panel: #ffffff;
  --muted: #6b625a;
  --line: #e0d8ce;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Georgia", "Times New Roman", serif;
  color: var(--ink);
  background: radial-gradient(circle at 10% 10%, rgba(196, 107, 59, 0.12), transparent 50%),
    radial-gradient(circle at 80% 0%, rgba(140, 62, 26, 0.1), transparent 45%),
    linear-gradient(120deg, #fdfbf7, #efe7db 60%, #f3e8da);
  min-height: 100vh;
}

.app {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 24px 28px 32px;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
  padding: 18px 20px;
  border-radius: 18px;
  box-shadow: 0 14px 30px rgba(29, 27, 25, 0.08);
  animation: rise 0.6s ease;
}

.topbar h1 {
  margin: 0;
  font-size: 1.8rem;
}

.topbar p {
  margin: 6px 0 0;
  color: var(--muted);
}

.controls {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.controls label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted);
}

.controls select,
.controls button,
.phase-choice select {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 0.95rem;
  background: var(--panel);
}

.mode-status {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(140, 62, 26, 0.12);
  color: var(--accent-dark);
  font-size: 0.85rem;
  border: 1px solid rgba(140, 62, 26, 0.2);
}

.controls button {
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
}

.composer-actions .secondary {
  background: #ffffff;
  color: var(--accent-dark);
  border: 1px solid var(--line);
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 20px;
}

.panel {
  background: var(--panel);
  border-radius: 18px;
  border: 1px solid var(--line);
  padding: 16px;
  box-shadow: 0 10px 20px rgba(29, 27, 25, 0.06);
}

.panel h2 {
  margin: 0 0 10px;
  font-size: 1.1rem;
}

.main-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-log {
  background: #fefcf7;
  border-radius: 14px;
  border: 1px solid var(--line);
  padding: 14px;
  min-height: 260px;
  max-height: 55vh;
  overflow-y: auto;
}

.message {
  padding: 12px 14px;
  border-radius: 12px;
  margin-bottom: 12px;
  line-height: 1.4;
  animation: fadeIn 0.4s ease;
}

.message.user {
  background: rgba(196, 107, 59, 0.12);
  border: 1px solid rgba(196, 107, 59, 0.35);
}

.message.assistant {
  background: rgba(140, 62, 26, 0.08);
  border: 1px solid rgba(140, 62, 26, 0.25);
}

.message.pending {
  border-style: dashed;
  opacity: 0.8;
}

.pending-text {
  font-style: italic;
  color: var(--muted);
}

.pending-text .dots {
  display: inline-block;
  animation: blink 1s infinite;
}

.message .meta {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.assistant-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.assistant-phase {
  font-weight: bold;
  color: var(--accent-dark);
}

.assistant-label {
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.summary-content h2,
.summary-content h3 {
  margin: 8px 0;
}

.summary-content p {
  margin: 6px 0 10px;
}

.summary-content ul {
  margin: 6px 0 12px;
  padding-left: 18px;
}
.message.assistant ol {
  margin: 0;
  padding-left: 18px;
}

.composer {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}

.composer textarea {
  flex: 1;
  min-height: 80px;
  border-radius: 14px;
  border: 1px solid var(--line);
  padding: 12px;
  font-size: 1rem;
  font-family: inherit;
}

.composer-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.composer button {
  border-radius: 14px;
  border: none;
  background: var(--accent-dark);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  padding: 10px 14px;
}

.phase-choice {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted);
}


.tips-column {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tips-log {
  max-height: 60vh;
}

.evidence-panel {
  margin-top: 4px;
}

.evidence-item {
  border-bottom: 1px dashed var(--line);
  padding: 10px 0;
  font-size: 0.95rem;
}

.evidence-item:last-child {
  border-bottom: none;
}

.evidence-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  gap: 12px;
}

.evidence-summary::-webkit-details-marker {
  display: none;
}

.evidence-summary::marker {
  content: "";
}

.evidence-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 8px;
}

.evidence-item pre {
  background: #f7f3ed;
  border-radius: 10px;
  padding: 10px;
  white-space: pre-wrap;
  border: 1px solid var(--line);
  margin: 8px 0;
}

.download-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--line);
  color: var(--accent-dark);
  text-decoration: none;
  background: #fff;
  flex-shrink: 0;
}

.download-link svg {
  width: 16px;
  height: 16px;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes blink {
  0% {
    opacity: 0.2;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0.2;
  }
}

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .composer {
    flex-direction: column;
  }
  .composer-actions {
    flex-direction: row;
    align-items: center;
  }
}