:root {
  --bg: #f7f7f8;
  --bg-soft: #ffffff;
  --panel: #ffffff;
  --panel-soft: #f3f4f6;
  --panel-deep: #eceef2;
  --line: #e5e7eb;
  --line-strong: #d1d5db;
  --text: #111827;
  --muted: #6b7280;
  --soft: #9ca3af;
  --accent: #7c3aed;
  --accent-soft: #f5f3ff;
  --green: #16a34a;
  --red: #dc2626;
  --shadow: 0 12px 40px rgba(17, 24, 39, 0.08);
  --code-accent: #7c3aed;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, #f8f8f8 0%, #f4f4f5 100%);
  color: var(--text);
  font-family: "Manrope", sans-serif;
  scrollbar-color: color-mix(in srgb, var(--accent) 55%, var(--line)) color-mix(in srgb, var(--panel-soft) 92%, transparent);
  scrollbar-width: thin;
}

body.dark-mode {
  --bg: #0b1020;
  --bg-soft: #111827;
  --panel: rgba(15, 23, 42, 0.86);
  --panel-soft: rgba(17, 24, 39, 0.92);
  --panel-deep: #182235;
  --line: rgba(148, 163, 184, 0.16);
  --line-strong: rgba(148, 163, 184, 0.28);
  --text: #e5eefb;
  --muted: #9fb0c9;
  --soft: #6f84a3;
  --accent: #a78bfa;
  --accent-soft: rgba(88, 28, 135, 0.18);
  --shadow: 0 18px 60px rgba(2, 6, 23, 0.45);
  background:
    radial-gradient(circle at top, rgba(59, 130, 246, 0.16), transparent 26%),
    radial-gradient(circle at right top, rgba(139, 92, 246, 0.14), transparent 22%),
    linear-gradient(180deg, #07101f 0%, #0b1020 100%);
}

button,
input,
select,
textarea,
a {
  font: inherit;
}

button {
  border: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

.studio-shell {
  min-height: 100vh;
  padding: 16px;
}

.topbar,
.preview-stage,
.editor-dock,
.startup-card {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: 14px 18px;
  border-radius: 22px;
  margin-bottom: 16px;
  backdrop-filter: blur(14px);
}

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

.brand-icon {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  object-fit: cover;
  background: color-mix(in srgb, var(--code-accent) 20%, var(--panel-soft));
}

.brand h1,
.startup-card h2,
.stage-header h2,
.section-head h3 {
  margin: 0;
}

.eyebrow,
.stage-kicker {
  margin: 0 0 4px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
}

.topbar-actions,
.stage-controls,
.inline-actions,
.status-row,
.editor-meta-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.project-select,
select,
input,
textarea {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--text);
}

select:focus,
input:focus,
textarea:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 68%, transparent);
  outline-offset: 0;
  border-color: color-mix(in srgb, var(--accent) 46%, var(--line));
}

select,
input {
  min-height: 42px;
  padding: 10px 12px;
}

textarea {
  padding: 14px;
  resize: vertical;
}

.summary-box {
  min-height: 88px;
}

.code-editor {
  min-height: 320px;
  flex: 1;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.91rem;
  line-height: 1.55;
}

.studio-grid {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(380px, 1fr);
  gap: 16px;
  align-items: stretch;
}

.preview-stage {
  border-radius: 28px;
  padding: 18px;
  min-height: calc(100vh - 130px);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.stage-header,
.section-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
  color: var(--muted);
  border-color: color-mix(in srgb, var(--code-accent) 16%, var(--line));
}

.preview-frame-wrap {
  flex: 1;
  min-height: 560px;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel-deep);
}

#previewFrame {
  width: 100%;
  height: 100%;
  border: 0;
  background: white;
}

.error-panel {
  border-radius: 20px;
  border: 1px solid var(--line);
  background: var(--panel-soft);
  padding: 14px;
}

.error-list,
.revision-list,
.entity-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.diff-strip {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.empty-state {
  border: 1px dashed var(--line-strong);
  border-radius: 16px;
  padding: 14px;
  color: var(--soft);
  background: color-mix(in srgb, var(--panel-soft) 82%, transparent);
}

.project-empty-state {
  border: 1px solid color-mix(in srgb, var(--accent) 24%, var(--line));
  border-radius: 24px;
  padding: 18px;
  background:
    radial-gradient(circle at top right, color-mix(in srgb, var(--accent) 16%, transparent), transparent 34%),
    linear-gradient(135deg, color-mix(in srgb, var(--accent) 10%, var(--panel-soft)), color-mix(in srgb, var(--accent) 4%, var(--bg-soft)));
}

.project-empty-state h4 {
  margin: 10px 0 8px;
  font-size: 1.2rem;
}

.project-empty-state p {
  margin: 0;
  color: var(--muted);
  max-width: 48ch;
}

.project-empty-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 16%, var(--panel-soft));
  color: color-mix(in srgb, var(--accent) 76%, var(--text));
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}

.error-item,
.entity-item,
.revision-item {
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
}

.entity-item,
.revision-item {
  width: 100%;
  color: var(--text);
  text-align: left;
  padding: 12px;
  cursor: pointer;
}

.entity-item:hover,
.entity-item.active,
.revision-item:hover,
.revision-item.active {
  border-color: color-mix(in srgb, var(--accent) 54%, var(--line));
  background: color-mix(in srgb, var(--accent) 12%, var(--bg-soft));
}

.entity-name,
.error-title {
  display: block;
  font-weight: 700;
}

.entity-meta,
.error-message,
.revision-meta,
.startup-message,
.startup-copy {
  color: var(--muted);
  font-size: 0.9rem;
}

.error-item {
  padding: 12px;
}

.editor-dock {
  border-radius: 28px;
  min-height: calc(100vh - 130px);
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  overflow: hidden;
}

.dock-rail {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px 10px;
  border-right: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel-soft) 72%, var(--bg));
}

.dock-tab {
  min-height: 78px;
  border-radius: 18px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.dock-tab.active {
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 88%, #5b21b6), color-mix(in srgb, var(--accent) 72%, #4c1d95));
  color: #fff;
}

.dock-body {
  padding: 16px;
  overflow: auto;
  min-height: 0;
  height: 100%;
}

.dock-panel {
  display: none;
  min-height: 0;
}

.dock-panel.active {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 0;
  height: 100%;
}

.button,
.link-button {
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  color: var(--text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.button.small {
  min-height: 36px;
  padding: 0 12px;
  font-size: 0.9rem;
}

.button.primary {
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 92%, #5b21b6), color-mix(in srgb, var(--accent) 76%, #4c1d95));
  color: #fff;
}

.button.ghost,
.link-button {
  background: var(--accent-soft);
  border: 1px solid var(--line);
}

.button.ghost:hover,
.link-button:hover {
  border-color: color-mix(in srgb, var(--accent) 44%, var(--line));
  background: color-mix(in srgb, var(--accent) 12%, var(--accent-soft));
}

.button.danger {
  background: color-mix(in srgb, var(--red) 14%, var(--panel-soft));
  color: var(--red);
}

.entity-item,
.revision-item,
.button,
.dock-tab,
.status-pill,
.topbar,
.preview-stage,
.editor-dock,
.modal-card,
.startup-card {
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
}

.hidden {
  display: none;
}

.hidden-file-input {
  display: none;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(4, 8, 20, 0.48);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 40;
  animation: fadeIn 180ms ease;
}

.modal-backdrop.hidden {
  display: none;
}

.modal-card {
  width: min(560px, 100%);
  border-radius: 24px;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 18px;
  animation: popIn 220ms ease;
}

.retry-row {
  margin-top: 8px;
  display: flex;
  justify-content: flex-start;
}

.import-button {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.import-button input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.revision-meta {
  padding: 10px 12px;
  border-radius: 14px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
}

.ai-response {
  min-height: 360px;
}

.ai-panel-shell {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 100%;
  min-width: 360px;
  overflow: hidden;
  height: 100%;
}

.ai-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 160px;
  gap: 12px;
  align-items: end;
}

.ai-field {
  display: block;
}

.ai-model-field {
  min-width: 0;
}

.ai-key-link {
  grid-column: 1 / -1;
  justify-self: start;
}

.ai-chat-card {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: color-mix(in srgb, var(--panel-soft) 92%, transparent);
  padding: 14px;
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  max-height: calc(100vh - 260px);
}

.ai-chat-head {
  font-weight: 700;
  margin-bottom: 10px;
}

.ai-chat-thread {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  padding: 6px 2px 14px;
  margin-bottom: 12px;
}

.ai-bubble {
  max-width: 88%;
  padding: 12px 14px;
  border-radius: 18px;
  line-height: 1.5;
  border: 1px solid var(--line);
  overflow: auto;
  max-height: 220px;
  white-space: pre-wrap;
  word-break: break-word;
  animation: bubbleIn 220ms ease;
}

.ai-bubble.user {
  align-self: flex-end;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 88%, #5b21b6), color-mix(in srgb, var(--accent) 72%, #4c1d95));
  color: white;
  border-color: transparent;
}

.ai-bubble.assistant {
  align-self: flex-start;
  background: color-mix(in srgb, var(--bg-soft) 90%, transparent);
}

.ai-bubble.system {
  align-self: center;
  background: color-mix(in srgb, var(--accent) 10%, var(--panel-soft));
  color: var(--muted);
}

.ai-composer {
  min-height: 96px;
  max-height: 160px;
  border-radius: 18px;
  background: color-mix(in srgb, var(--bg-soft) 92%, transparent);
  transition: border-color 180ms ease, transform 180ms ease, background 180ms ease;
}

.ai-chat-card::-webkit-scrollbar,
.dock-body::-webkit-scrollbar,
.ai-bubble::-webkit-scrollbar,
textarea::-webkit-scrollbar,
.entity-list::-webkit-scrollbar,
.revision-list::-webkit-scrollbar,
.error-list::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

.ai-chat-card::-webkit-scrollbar-track,
.dock-body::-webkit-scrollbar-track,
.ai-bubble::-webkit-scrollbar-track,
textarea::-webkit-scrollbar-track,
.entity-list::-webkit-scrollbar-track,
.revision-list::-webkit-scrollbar-track,
.error-list::-webkit-scrollbar-track {
  background: color-mix(in srgb, var(--panel-soft) 88%, transparent);
  border-radius: 999px;
}

.ai-chat-card::-webkit-scrollbar-thumb,
.dock-body::-webkit-scrollbar-thumb,
.ai-bubble::-webkit-scrollbar-thumb,
textarea::-webkit-scrollbar-thumb,
.entity-list::-webkit-scrollbar-thumb,
.revision-list::-webkit-scrollbar-thumb,
.error-list::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 75%, #5b21b6), color-mix(in srgb, var(--accent) 58%, #4c1d95));
  border: 2px solid color-mix(in srgb, var(--panel-soft) 88%, transparent);
  border-radius: 999px;
}

.ai-chat-card::-webkit-scrollbar-thumb:hover,
.dock-body::-webkit-scrollbar-thumb:hover,
.ai-bubble::-webkit-scrollbar-thumb:hover,
textarea::-webkit-scrollbar-thumb:hover,
.entity-list::-webkit-scrollbar-thumb:hover,
.revision-list::-webkit-scrollbar-thumb:hover,
.error-list::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 88%, #6d28d9), color-mix(in srgb, var(--accent) 72%, #5b21b6));
}

.image-editor-card {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: color-mix(in srgb, var(--panel-soft) 92%, transparent);
  padding: 14px;
}

.image-editor-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(220px, 0.7fr);
  gap: 14px;
}

.image-preview-wrap {
  min-height: 280px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background:
    linear-gradient(45deg, rgba(255,255,255,0.04) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.04) 75%),
    linear-gradient(45deg, rgba(255,255,255,0.04) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.04) 75%);
  background-size: 24px 24px;
  background-position: 0 0, 12px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#imageEditorCanvas {
  max-width: 100%;
  max-height: 360px;
}

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

label {
  color: var(--muted);
  display: block;
}

.startup-gate {
  position: fixed;
  inset: 0;
  background: rgba(244, 244, 245, 0.84);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 30;
}

body.dark-mode .startup-gate {
  background: rgba(4, 8, 20, 0.72);
}

.startup-gate.hidden {
  display: none;
}

.startup-card {
  width: min(560px, 100%);
  border-radius: 28px;
  padding: 24px;
}

.startup-brand {
  margin-bottom: 16px;
}

.startup-steps {
  margin: 0 0 18px;
  padding-left: 20px;
  color: var(--muted);
}

.startup-steps li {
  margin-bottom: 8px;
}

@keyframes bubbleIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes popIn {
  from {
    opacity: 0;
    transform: scale(0.98) translateY(6px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@media (max-width: 1180px) {
  .studio-grid {
    grid-template-columns: 1fr;
  }

  .editor-dock,
  .preview-stage {
    min-height: auto;
  }

  .editor-dock {
    grid-template-columns: 1fr;
  }

  .dock-rail {
    flex-direction: row;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    overflow-x: auto;
    padding: 10px;
  }

  .dock-tab {
    writing-mode: initial;
    transform: none;
    min-height: 42px;
    min-width: max-content;
    padding: 0 14px;
  }

  .dock-body {
    padding: 14px;
    overflow-x: auto;
  }

  .ai-chat-card {
    max-height: none;
  }

  .ai-bubble {
    max-width: min(100%, 42rem);
    max-height: none;
    overflow-wrap: anywhere;
  }
}

@media (max-width: 760px) {
  .studio-shell {
    padding: 10px;
  }

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

  .editor-dock {
    border-radius: 24px;
  }

  .preview-stage,
  .dock-body,
  .ai-chat-card {
    padding: 12px;
  }

  .dock-panel.active {
    min-width: max-content;
  }

  .ai-panel-shell {
    min-width: 360px;
  }

  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .ai-toolbar {
    grid-template-columns: 1fr;
  }

  .ai-chat-thread {
    padding: 4px 0 10px;
  }

  .ai-bubble {
    padding: 12px;
    font-size: 0.96rem;
    width: fit-content;
  }

  .ai-composer {
    min-height: 88px;
  }

  .image-editor-grid {
    grid-template-columns: 1fr;
  }
}