:root {
  --bg: #ffffff;
  --bg-panel: #f5f5f5;
  --border: #dcdcdc;
  --text: #1e1e1e;
  --text-muted: #6b6b6b;
  --accent: #4f8cff;
  --danger: #e03131;
  --warning: #f08c00;
  --toolbar-h: 56px;
}

:root[data-theme="dark"] {
  --bg: #121212;
  --bg-panel: #1e1e1e;
  --border: #333333;
  --text: #e8e8e8;
  --text-muted: #9a9a9a;
  --accent: #74a4ff;
}

* {
  box-sizing: border-box;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Caveat", system-ui, sans-serif;
  font-size: 18px;
  overflow: hidden;
  -webkit-overflow-scrolling: touch;
}

#app {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: var(--toolbar-h) 1fr;
  height: 100%;
}

/* --- Toolbar --- */

#toolbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.toolbar-group {
  display: flex;
  gap: 4px;
  padding: 0 8px;
  border-right: 1px solid var(--border);
}

.toolbar-group:last-child {
  border-right: none;
  margin-left: auto;
}

button,
input[type="file"]::file-selector-button {
  font-family: inherit;
  font-size: 15px;
  min-width: 44px;
  min-height: 44px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

button[aria-pressed="true"] {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

button.icon {
  padding: 0 10px;
}

input[type="color"] {
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: none;
}

/* --- Sidebar --- */

#sidebar {
  width: 220px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  transition: margin-left 0.2s ease;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

#sidebar.collapsed {
  margin-left: -220px;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px 0;
}

#sidebar h2 {
  font-size: 20px;
  margin: 0;
}

#sidebar ul {
  list-style: none;
  margin: 0;
  padding: 8px;
}

#sidebar li button {
  min-height: 44px;
  text-align: left;
  padding: 0 10px;
  margin-bottom: 4px;
  background: transparent;
  border: none;
}

#sidebar li button:hover {
  background: var(--border);
}

.project-header {
  display: flex;
  align-items: center;
  gap: 2px;
}

.project-name {
  flex: 1;
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.icon-sm {
  min-width: 36px;
  min-height: 36px;
  width: 36px;
  flex-shrink: 0;
  padding: 0;
  font-size: 14px;
}

.canvas-list {
  padding: 0 0 4px 14px !important;
}

.canvas-list button {
  flex: 1;
  min-width: 0;
  font-size: 15px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.canvas-list button.icon-sm {
  flex: 0 0 36px;
  width: 36px;
}

.canvas-list button.current {
  background: var(--accent);
  color: #fff;
}

/* --- Canvas --- */

#canvas-wrap {
  position: relative;
  overflow: hidden;
}

#canvas {
  width: 100%;
  height: 100%;
  touch-action: none;
  display: block;
  background: var(--bg);
}

#text-editor {
  position: absolute;
  font-family: "Caveat", cursive;
  font-size: 20px;
  border: 1px dashed var(--accent);
  background: transparent;
  color: var(--text);
  resize: none;
  padding: 2px;
  min-width: 120px;
  min-height: 30px;
}

/* --- Banner de orçamento --- */

#budget-banner {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 15px;
  display: none;
  z-index: 20;
  max-width: 90vw;
}

#budget-banner.warning {
  display: block;
  background: var(--warning);
  color: #1e1e1e;
}

#budget-banner.blocked {
  display: block;
  background: var(--danger);
  color: #fff;
}

/* --- Auto-save indicator --- */

#save-indicator {
  position: absolute;
  bottom: 10px;
  left: 10px;
  font-size: 13px;
  color: var(--text-muted);
  z-index: 10;
}

/* --- Chat panel --- */

#chat-panel {
  position: fixed;
  top: var(--toolbar-h);
  right: 0;
  bottom: 0;
  width: 320px;
  max-width: 92vw;
  background: var(--bg-panel);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.2s ease;
  z-index: 30;
}

#chat-panel.open {
  transform: translateX(0);
}

#chat-messages {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 10px;
}

.chat-msg {
  margin-bottom: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
}

.chat-msg.user {
  background: var(--accent);
  color: #fff;
}

.chat-msg.error {
  background: var(--danger);
  color: #fff;
}

#chat-input-row {
  display: flex;
  gap: 4px;
  padding: 8px;
  border-top: 1px solid var(--border);
}

#chat-input-row textarea {
  flex: 1;
  font-family: inherit;
  font-size: 15px;
  min-height: 44px;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
}

/* --- Modais (login / budget config) --- */

dialog {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  min-width: 280px;
  max-width: 90vw;
}

dialog::backdrop {
  background: rgba(0, 0, 0, 0.4);
}

dialog form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 10px;
}

dialog label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 15px;
}

dialog input {
  min-height: 44px;
  font-size: 15px;
  padding: 0 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
}

.hidden {
  display: none;
}

.label-import {
  display: flex;
  align-items: center;
}

.hint-text {
  font-size: 13px;
  padding: 0 14px;
  color: var(--text-muted);
}

.dialog-title {
  margin: 0;
}

.status-text {
  font-size: 14px;
  color: var(--text-muted);
}

@media (max-width: 720px) {
  #sidebar {
    position: fixed;
    top: var(--toolbar-h);
    bottom: 0;
    left: 0;
    z-index: 25;
  }
  #sidebar.collapsed {
    margin-left: -220px;
  }
}

/* --- Bibliotecas de formas --- */

#library-dialog {
  width: min(720px, 94vw);
  max-height: 85vh;
  overflow-y: auto;
}

.library-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.library-head .dialog-title {
  flex: 1 1 100%;
  margin: 0;
}

#library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
  gap: 8px;
}

#library-grid button {
  min-height: 96px;
  padding: 4px;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 6px;
}

#library-grid img {
  width: 100%;
  height: 88px;
  object-fit: contain;
  pointer-events: none;
}