:root {
  --bg: #f5f5f2;
  --card: #ffffff;
  --text: rgba(0,0,0,0.8);
  --muted: rgba(0,0,0,0.45);
  --line: rgba(0,0,0,0.09);
  --accent: #111111;
  --danger: #b02d2d;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(0,0,0,0.05);
  --ai: #f2eee5;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
}
body { min-height: 100vh; }
button, input, textarea {
  font: inherit;
}
button {
  border: 0;
  border-radius: 14px;
  cursor: pointer;
}
.hidden { display: none !important; }
#app {
  max-width: 980px;
  margin: 0 auto;
  padding: calc(20px + env(safe-area-inset-top)) 16px calc(24px + env(safe-area-inset-bottom));
}
.shell-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 2px 18px;
}
.brand {
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.screen { display: none; }
.screen.active { display: block; }
.hero {
  padding: 10px 6px 24px;
}
.hero h1 {
  margin: 0 0 10px;
  font-size: 28px;
  letter-spacing: 0.05em;
}
.hero p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}
.format-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.format-card {
  background: var(--card);
  padding: 16px;
  min-height: 200px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
}
.format-title {
  font-size: 16px;
  text-align: center;
}
.mini-grid {
  width: 100%;
  display: grid;
  gap: 6px;
  align-self: center;
  margin: auto 0;
}
.mini-grid.one, .mini-grid.nine {
  aspect-ratio: 1;
}
.mini-grid.three {
  aspect-ratio: 3 / 1;
}
.mini-grid span {
  border-radius: 12px;
  background: rgba(0,0,0,0.07);
  display: block;
}
.mini-grid.one { grid-template-columns: 1fr; }
.mini-grid.three { grid-template-columns: repeat(3,1fr); }
.mini-grid.nine { grid-template-columns: repeat(3,1fr); }
.toolbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.top-row { margin-bottom: 14px; }
.bottom-row { margin-top: 16px; justify-content: center; }
.format-label {
  font-size: 15px;
  color: var(--muted);
}
.top-actions, .bottom-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.canvas-wrap {
  display: grid;
  gap: 12px;
}
.room-grid {
  display: grid;
  gap: 12px;
}
.room-grid.rooms-1 { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
.room-grid.rooms-3 { grid-template-columns: repeat(3, 1fr); }
.room-grid.rooms-9 { grid-template-columns: repeat(3, 1fr); }
.room-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  aspect-ratio: 1;
  padding: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
}
.room-card.empty {
  justify-content: center;
  align-items: center;
  color: var(--muted);
}
.room-card.ai { background: linear-gradient(180deg, #fff 0%, var(--ai) 100%); }
.room-card.has-image {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.room-card.arrange-ready { cursor: grab; }
.room-card.dragging { opacity: 0.65; cursor: grabbing; }
.room-card.has-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.14) 0%, rgba(0,0,0,0.05) 35%, rgba(0,0,0,0.36) 100%);
}
.room-card.has-image > * {
  position: relative;
  z-index: 1;
}
.room-card.has-image .room-number,
.room-card.has-image .room-app,
.room-card.has-image .room-note,
.room-card.has-image .room-badge {
  color: #ffffff;
}
.room-card.has-image .room-badge {
  background: rgba(255,255,255,0.16);
  border: 1px solid rgba(255,255,255,0.24);
  backdrop-filter: blur(8px);
}
.room-card.swap-selected {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.room-number {
  font-size: 12px;
  color: var(--muted);
}
.room-app {
  font-size: 16px;
  line-height: 1.25;
}
.room-note {
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
  overflow: hidden;
}
.room-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  padding: 5px 9px;
  border-radius: 999px;
  background: rgba(0,0,0,0.05);
  font-size: 11px;
  color: var(--muted);
}
.room-placeholder {
  font-size: 14px;
  text-align: center;
}
.lock-mark { font-size: 12px; }
.ghost {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 11px 14px;
}
.ghost.small {
  padding: 8px 12px;
  font-size: 13px;
}
.primary {
  background: var(--accent);
  color: white;
  padding: 11px 16px;
}
.import-label {
  position: relative;
  overflow: hidden;
}
.import-label input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}
.sheet-dialog {
  border: 0;
  padding: 0;
  background: transparent;
  width: min(100vw - 24px, 640px);
}
.sheet-dialog::backdrop {
  background: rgba(0,0,0,0.34);
}
.sheet {
  background: var(--card);
  border-radius: 24px;
  padding: 18px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.18);
  border: 1px solid var(--line);
}
.sheet.narrow { max-width: 520px; }
.sheet-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}
.sheet-head h2 {
  margin: 0 0 6px;
  font-size: 22px;
}
.sheet-head p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}
.app-list, .library-list {
  display: grid;
  gap: 10px;
}
.app-item, .library-item {
  padding: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  text-align: left;
}
.app-item.ai { background: var(--ai); }
.app-name {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}
.app-copy, .library-copy, .info-copy {
  color: var(--muted);
  line-height: 1.6;
}
.choice-buttons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 10px;
}
.choice-buttons.single { grid-template-columns: 1fr; }
.field {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
}
.field span {
  color: var(--muted);
  font-size: 13px;
}
.field input, .field textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
}
.error-text {
  color: var(--danger);
  font-size: 13px;
  margin: 4px 0 12px;
}
.library-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 12px;
  margin-top: 8px;
}
@media (max-width: 740px) {
  .format-grid {
    grid-template-columns: 1fr;
  }
  .room-grid.rooms-3, .room-grid.rooms-9 {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }
  .room-card {
    padding: 10px;
    border-radius: 16px;
  }
  .room-app {
    font-size: 13px;
  }
  .room-note {
    font-size: 11px;
    -webkit-line-clamp: 3;
  }
  .bottom-row {
    justify-content: flex-start;
  }
}


.grid-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.ghost.danger {
  color: var(--danger);
}

.screen-app { min-height: calc(100vh - 120px); }
.app-shell {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
  overflow: hidden;
  min-height: 72vh;
}
.app-frame {
  width: 100%;
  min-height: 72vh;
  border: 0;
  background: #fff;
}


.room-card {
  overflow: hidden;
}
.room-card.has-video {
  color: #fff;
}
.room-media {
  position: absolute;
  inset: 0;
  overflow: hidden;
  border-radius: inherit;
  pointer-events: none;
  z-index: 0;
}
.room-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.room-card.has-video::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.52), rgba(0,0,0,0.10) 45%, rgba(0,0,0,0.22));
  z-index: 0;
}
.room-card > * {
  position: relative;
  z-index: 1;
}