:root {
  --bg: #07111e;
  --bg-alt: #0b1828;
  --panel: rgba(10, 21, 36, 0.88);
  --panel-strong: rgba(8, 18, 30, 0.96);
  --border: rgba(111, 179, 255, 0.18);
  --text: #dce9ff;
  --text-dim: #8ca4c8;
  --text-soft: #607695;
  --accent: #75e7c7;
  --accent-strong: #4ad3ff;
  --warning: #ffcc66;
  --danger: #ff7b8b;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

[data-theme="light"] {
  --bg: #edf4ff;
  --bg-alt: #dfeaff;
  --panel: rgba(255, 255, 255, 0.88);
  --panel-strong: rgba(255, 255, 255, 0.96);
  --border: rgba(28, 89, 164, 0.14);
  --text: #172843;
  --text-dim: #4d6383;
  --text-soft: #7d90ad;
  --accent: #0f936d;
  --accent-strong: #006cbb;
  --warning: #a56700;
  --danger: #ba2741;
  --shadow: 0 20px 60px rgba(61, 89, 138, 0.12);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 16px;
  padding: 18px;
  color: var(--text);
  font-family: "Space Mono", monospace;
  background:
    radial-gradient(circle at top left, rgba(74, 211, 255, 0.12), transparent 35%),
    radial-gradient(circle at right center, rgba(117, 231, 199, 0.08), transparent 40%),
    linear-gradient(160deg, var(--bg), var(--bg-alt));
}

button,
textarea {
  font: inherit;
}

.topbar,
.panel,
.composer {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--panel);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  box-shadow: 0 0 18px rgba(117, 231, 199, 0.55);
}

.brand-title {
  font-family: "Syne", sans-serif;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-title span {
  color: var(--accent);
}

.brand-subtitle {
  margin-top: 4px;
  color: var(--text-dim);
  font-size: 0.74rem;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-pill {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.72rem;
  white-space: nowrap;
}

.status-pill.busy {
  color: var(--accent-strong);
  border-color: rgba(74, 211, 255, 0.4);
}

.icon-button,
.ghost-button,
.primary-button {
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
  padding: 10px 14px;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.icon-button:hover,
.ghost-button:hover,
.primary-button:hover {
  transform: translateY(-1px);
  border-color: rgba(117, 231, 199, 0.4);
}

.primary-button {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #06101a;
  font-weight: 700;
}

.layout {
  min-height: 0;
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 16px;
}

.panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
}

.panel-header h1 {
  margin: 0;
  font-family: "Syne", sans-serif;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.panel-body {
  min-height: 0;
  overflow: auto;
  padding: 18px;
}

.chat-body,
.timeline-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.message,
.timeline-event {
  border-radius: 16px;
  border: 1px solid var(--border);
  padding: 14px 16px;
  background: var(--panel-strong);
}

.message.user {
  background: rgba(74, 211, 255, 0.09);
}

.message.assistant {
  background: rgba(117, 231, 199, 0.06);
}

.message.error {
  background: rgba(255, 123, 139, 0.08);
  border-color: rgba(255, 123, 139, 0.2);
}

.message-label,
.timeline-label {
  margin-bottom: 8px;
  color: var(--text-dim);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.message-body,
.timeline-body-text {
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.6;
  font-size: 0.82rem;
}

.timeline-event.kind-tool_called {
  border-left: 4px solid var(--accent-strong);
}

.timeline-event.kind-tool_result {
  border-left: 4px solid var(--accent);
}

.timeline-event.kind-error {
  border-left: 4px solid var(--danger);
}

.timeline-event.kind-budget {
  border-left: 4px solid var(--warning);
}

.timeline-event.kind-final {
  border-left: 4px solid var(--accent);
}

.empty-state {
  padding: 30px 18px;
  text-align: center;
  color: var(--text-soft);
  border: 1px dashed var(--border);
  border-radius: 14px;
}

.typing-indicator {
  display: none;
  gap: 6px;
  align-items: center;
  padding: 10px 4px 0;
}

.typing-indicator.visible {
  display: flex;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent-strong);
  animation: bounce 1s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.16s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.32s;
}

@keyframes bounce {
  0%, 80%, 100% {
    transform: translateY(0);
    opacity: 0.45;
  }
  40% {
    transform: translateY(-5px);
    opacity: 1;
  }
}

.composer {
  padding: 16px 18px;
}

.composer-row {
  display: flex;
}

#prompt {
  width: 100%;
  min-height: 78px;
  max-height: 240px;
  resize: vertical;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.12);
  color: var(--text);
  padding: 14px 16px;
}

#prompt:focus {
  outline: 2px solid rgba(74, 211, 255, 0.35);
  border-color: rgba(74, 211, 255, 0.45);
}

.composer-footer {
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.composer-hint {
  color: var(--text-dim);
  font-size: 0.74rem;
}

kbd {
  padding: 2px 6px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.74rem;
}

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

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }

  body {
    padding: 12px;
  }

  .topbar,
  .composer {
    padding: 14px;
  }

  .composer-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .composer-actions {
    justify-content: stretch;
  }

  .composer-actions > button {
    flex: 1;
  }
}