@font-face {
  font-family: 'Material Symbols Outlined';
  font-style: normal;
  font-weight: 400;
  font-display: block;
  src: url('fonts/material-symbols-outlined-subset.woff2') format('woff2');
}

:root {
  color-scheme: light dark;
  --accent: #007acc;
  --accent-contrast: #ffffff;
  --bg: #f4f4f6;
  --bg-elevated: #ffffff;
  --bg-sunken: #e8e8ec;
  --border: #d4d4d9;
  --text: #1a1a1e;
  --text-muted: #6b6b72;
  --panel-bg: #ececef;
  --danger: #d9412f;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
  --topbar-height: 48px;
  --statusbar-height: 26px;
  --tabbar-height: 34px;
}

:root[data-theme='dark'] {
  --bg: #1e1e20;
  --bg-elevated: #29292c;
  --bg-sunken: #17171a;
  --border: #3a3a3e;
  --text: #efeff1;
  --text-muted: #a1a1a8;
  --panel-bg: #232326;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #1e1e20;
    --bg-elevated: #29292c;
    --bg-sunken: #17171a;
    --border: #3a3a3e;
    --text: #efeff1;
    --text-muted: #a1a1a8;
    --panel-bg: #232326;
    --shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  overscroll-behavior: none;
}

body {
  font-family: system-ui, -apple-system, 'Segoe UI', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  display: grid;
  grid-template-columns: minmax(200px, 260px) 1fr minmax(200px, 260px);
  grid-template-rows: var(--topbar-height) 1fr var(--statusbar-height);
  grid-template-areas:
    'topbar topbar topbar'
    'left canvas right'
    'status status status';
  height: 100dvh;
  overflow: hidden;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

app-topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  padding: 0 6px;
}

panel-area {
  display: flex;
  flex-direction: column;
  background: var(--panel-bg);
  min-height: 0;
}

panel-area[data-side='left'] {
  grid-area: left;
  border-right: 1px solid var(--border);
}

panel-area[data-side='right'] {
  grid-area: right;
  border-left: 1px solid var(--border);
}

.canvas-area {
  grid-area: canvas;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  background: var(--bg-sunken);
}

canvas-tabs {
  display: flex;
  height: var(--tabbar-height);
  flex: none;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

canvas-desk {
  flex: 1;
  min-height: 0;
  display: block;
  overflow: auto;
  position: relative;
}

status-bar {
  grid-area: status;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 10px;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 11px;
}

button {
  font: inherit;
  color: inherit;
}

dialog {
  color: var(--text);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

dialog::backdrop {
  background: rgba(0, 0, 0, 0.35);
}