:root {
  --color-bg: #0f172a;
  --color-fg: #e2e8f0;
  --color-accent: #6366f1;
  --color-vitals-bg: #1e293b;
  --color-vitals-fg: #f1f5f9;
  --color-user-bubble: #334155;
  --color-persona-bubble: #1e3a5f;
  --color-border: #334155;
  --color-muted: #94a3b8;
  --art-accent: var(--color-accent);
  --art-muted: var(--color-muted);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--color-bg);
  color: var(--color-fg);
  position: relative;
  overflow-x: hidden;
}

.background-art {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.06;
  overflow: hidden;
}

.background-art .persona-art-bg {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(1.4);
  font-size: 1.1rem;
  line-height: 1.2;
  white-space: pre;
}

.app {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(160px, 220px) minmax(0, 1fr) 280px;
  grid-template-rows: auto minmax(0, 1fr) auto auto;
  min-height: 100vh;
  gap: 0;
}

.header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 1.25rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.vitals {
  background: var(--color-vitals-bg);
  padding: 1rem;
  overflow-y: auto;
}

.chat-history {
  padding: 1rem 1.25rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.chat-form {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-top: 1px solid var(--color-border);
}

.status-bar {
  padding: 0.35rem 1.25rem;
  font-size: 0.8rem;
  color: var(--color-muted);
  border-top: 1px solid var(--color-border);
}

.persona-art {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 0.75rem;
  background: color-mix(in srgb, var(--color-bg) 92%, var(--color-accent) 8%);
}

/* --- Layout: persona art --- */
.app.layout-art-sidebar_left .persona-art {
  grid-column: 1;
  grid-row: 1 / -1;
  border-right: 1px solid var(--color-border);
}

.app.layout-art-sidebar_right .persona-art {
  grid-column: 3;
  grid-row: 1 / -1;
  border-left: 1px solid var(--color-border);
}

.app.layout-art-center .persona-art {
  grid-column: 2;
  grid-row: 2;
  min-height: 140px;
  border-bottom: 1px solid var(--color-border);
}

.app.layout-art-top_left .persona-art {
  grid-column: 1;
  grid-row: 1;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.app.layout-art-top_right .persona-art {
  grid-column: 3;
  grid-row: 1;
  border-left: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.app.layout-art-bottom_left .persona-art {
  grid-column: 1;
  grid-row: 3 / 5;
  border-right: 1px solid var(--color-border);
}

.app.layout-art-bottom_right .persona-art {
  grid-column: 3;
  grid-row: 3 / 5;
  border-left: 1px solid var(--color-border);
}

/* --- Layout: vitals --- */
.app.layout-vitals-sidebar_right .vitals {
  grid-column: 3;
  grid-row: 1 / -1;
  border-left: 1px solid var(--color-border);
}

.app.layout-vitals-sidebar_left .vitals {
  grid-column: 1;
  grid-row: 1 / -1;
  border-right: 1px solid var(--color-border);
}

.app.layout-vitals-top_right .vitals {
  grid-column: 3;
  grid-row: 1;
  max-height: 220px;
  border-left: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.app.layout-vitals-top_left .vitals {
  grid-column: 1;
  grid-row: 1;
  max-height: 220px;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.app.layout-vitals-bottom_right .vitals {
  grid-column: 3;
  grid-row: 3 / 5;
  border-left: 1px solid var(--color-border);
}

.app.layout-vitals-bottom_left .vitals {
  grid-column: 1;
  grid-row: 3 / 5;
  border-right: 1px solid var(--color-border);
}

.app.layout-vitals-center .vitals {
  grid-column: 2;
  grid-row: 1;
  max-height: 180px;
  border-bottom: 1px solid var(--color-border);
}

/* --- Layout: chat history --- */
.app.layout-chat-center .chat-history {
  grid-column: 2;
  grid-row: 2;
}

.app.layout-chat-sidebar_left .chat-history {
  grid-column: 1;
  grid-row: 2;
}

.app.layout-chat-sidebar_right .chat-history {
  grid-column: 3;
  grid-row: 2;
}

.app.layout-chat-top_left .chat-history {
  grid-column: 1 / 3;
  grid-row: 2;
}

.app.layout-chat-top_right .chat-history {
  grid-column: 2 / 4;
  grid-row: 2;
}

.app.layout-chat-bottom_left .chat-history {
  grid-column: 1 / 3;
  grid-row: 2;
}

.app.layout-chat-bottom_right .chat-history {
  grid-column: 2 / 4;
  grid-row: 2;
}

/* --- Layout: chat input --- */
.app.layout-input-bottom_left .chat-form,
.app.layout-input-center .chat-form {
  grid-column: 2;
  grid-row: 3;
}

.app.layout-input-bottom_right .chat-form {
  grid-column: 2 / 4;
  grid-row: 3;
}

.app.layout-input-sidebar_left .chat-form {
  grid-column: 1;
  grid-row: 3;
}

.app.layout-input-sidebar_right .chat-form {
  grid-column: 3;
  grid-row: 3;
}

.app.layout-input-top_left .chat-form {
  grid-column: 1;
  grid-row: 1;
}

.app.layout-input-top_right .chat-form {
  grid-column: 3;
  grid-row: 1;
}

/* --- Layout: header --- */
.app.layout-header-top_left .header {
  grid-column: 2;
  grid-row: 1;
}

.app.layout-header-top_right .header {
  grid-column: 2 / 4;
  grid-row: 1;
  justify-content: flex-end;
}

.app.layout-header-center .header {
  grid-column: 1 / -1;
  grid-row: 1;
  justify-content: center;
}

.app.layout-header-bottom_left .header {
  grid-column: 1;
  grid-row: 4;
  border-top: 1px solid var(--color-border);
  border-bottom: none;
}

.app.layout-header-bottom_right .header {
  grid-column: 3;
  grid-row: 4;
  border-top: 1px solid var(--color-border);
  border-bottom: none;
}

.app.layout-header-sidebar_left .header {
  grid-column: 1;
  grid-row: 1;
}

.app.layout-header-sidebar_right .header {
  grid-column: 3;
  grid-row: 1;
}

/* Status bar follows main column */
.status-bar {
  grid-column: 2;
  grid-row: 4;
}

.chat-form input {
  flex: 1;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  color: var(--color-fg);
  font-size: 1rem;
}

.chat-form button {
  padding: 0.65rem 1.1rem;
  border: none;
  border-radius: 8px;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

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

.bubble {
  max-width: 85%;
  padding: 0.65rem 0.9rem;
  border-radius: 12px;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
}

.bubble.user {
  align-self: flex-end;
  background: var(--color-user-bubble);
}

.bubble.persona {
  align-self: flex-start;
  background: var(--color-persona-bubble);
}

.persona-art-ascii {
  margin: 0;
  font-family: "Cascadia Mono", "Fira Code", ui-monospace, monospace;
  font-size: 0.72rem;
  line-height: 1.15;
  letter-spacing: 0.02em;
  white-space: pre;
  text-align: center;
  color: var(--color-fg);
  text-shadow: 0 0 18px color-mix(in srgb, var(--art-accent) 35%, transparent);
}

.persona-art-ascii .art-accent {
  color: var(--art-accent);
  font-weight: 700;
}

.persona-art-pixel {
  image-rendering: pixelated;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.app.survival-attention .persona-art-ascii {
  animation: art-pulse-slow 4s ease-in-out infinite;
}

.app.survival-elevated .persona-art {
  background: color-mix(in srgb, #1c1917 90%, #f97316 10%);
}

.app.survival-elevated .persona-art-ascii {
  animation: none;
  opacity: 0.88;
}

.app.survival-critical .persona-art {
  background: color-mix(in srgb, #450a0a 85%, #ef4444 15%);
}

.app.survival-critical .persona-art-ascii {
  animation: none;
  opacity: 0.75;
  filter: saturate(0.85);
}

.app.typography-mono-vintage .header,
.app.typography-mono-vintage .chat-form input,
.app.typography-mono-vintage .bubble {
  font-family: "Cascadia Mono", ui-monospace, monospace;
}

.app.typography-serif-warm .header,
.app.typography-serif-warm .bubble {
  font-family: Georgia, "Times New Roman", serif;
}

.app.density-compact .chat-history {
  gap: 0.45rem;
}

.app.density-spacious .chat-history {
  gap: 1rem;
  padding: 1.5rem;
}

@keyframes art-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.72; }
}

@keyframes art-pulse-slow {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.85; }
}

.vitals-panel {
  font-size: 0.9rem;
  line-height: 1.6;
}

.vitals-name {
  font-weight: 700;
  margin-bottom: 0.75rem;
  font-size: 1rem;
}

.vitals-row {
  margin-bottom: 0.35rem;
}

.vitals-label {
  color: var(--color-muted);
  display: inline-block;
  min-width: 4.5rem;
}

.vitals-bar-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.vitals-bar {
  flex: 1;
  height: 8px;
  background: var(--color-border);
  border-radius: 4px;
  overflow: hidden;
}

.vitals-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s ease;
}

.vitals-ascii {
  font-family: ui-monospace, monospace;
  margin: 0.5rem 0;
  font-size: 0.85rem;
}

.survival-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 0.4rem;
}

.vitals-minimal {
  display: flex;
  align-items: center;
}

@media (max-width: 900px) {
  .app {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto minmax(0, 1fr) auto auto;
  }

  .app .header,
  .app .persona-art,
  .app .vitals,
  .app .chat-history,
  .app .chat-form,
  .app .status-bar {
    grid-column: 1 !important;
    grid-row: auto !important;
    max-height: none;
  }

  .app .header { grid-row: 1 !important; }
  .app .persona-art { grid-row: 2 !important; min-height: 140px; border-right: none; border-bottom: 1px solid var(--color-border); }
  .app .vitals { grid-row: 3 !important; border-left: none; border-bottom: 1px solid var(--color-border); max-height: 180px; }
  .app .chat-history { grid-row: 4 !important; }
  .app .chat-form { grid-row: 5 !important; }
  .app .status-bar { grid-row: 6 !important; }
}