:root {
  --bg-app: #16141c;
  --bg-panel: #1d1a25;
  --bg-panel-2: #242030;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e9e6f0;
  --text-dim: #948fa3;
  --accent-a: #8b5cf6;
  --accent-b: #ec4899;
  --accent-grad: linear-gradient(135deg, var(--accent-a), var(--accent-b));
  --danger: #f43f5e;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg-app);
  color: var(--text);
}

button, input, textarea, select {
  font-family: inherit;
  color: inherit;
}

/* ---------- App layout ---------- */

body:not(.login-body) {
  display: grid;
  grid-template-columns: 260px 1fr 280px;
  grid-template-rows: 52px 1fr;
  grid-template-areas:
    "topbar topbar topbar"
    "left   viewport right";
  height: 100vh;
  overflow: hidden;
}

#topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
  letter-spacing: 0.2px;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.spacer { flex: 1; }

.status {
  font-size: 12px;
  color: var(--text-dim);
  min-width: 140px;
}

#left-panel, #right-panel {
  border-right: 1px solid var(--border);
  background: var(--bg-panel);
  padding: 14px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

#left-panel { grid-area: left; }
#right-panel { grid-area: right; border-right: none; border-left: 1px solid var(--border); }
#right-panel.hidden { display: none; }

.panel-block { display: flex; flex-direction: column; gap: 8px; }
.panel-fill { flex: 1; min-height: 0; }

label {
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

textarea, input[type="number"], input[type="password"], select {
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 13px;
  outline: none;
}

textarea:focus, input:focus, select:focus { border-color: var(--accent-a); }

#chip-row { display: flex; flex-wrap: wrap; gap: 6px; }

.chip {
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
  cursor: pointer;
}
.chip:hover { border-color: var(--accent-a); }

.btn-primary {
  background: var(--accent-grad);
  border: none;
  border-radius: 8px;
  padding: 10px;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
}
.btn-primary:disabled { opacity: 0.5; cursor: default; }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 12px;
  cursor: pointer;
  color: var(--text);
  text-decoration: none;
}
.btn-ghost:hover { border-color: var(--accent-a); }

.btn-danger {
  background: transparent;
  border: 1px solid var(--danger);
  color: var(--danger);
  border-radius: 8px;
  padding: 8px;
  cursor: pointer;
}

#layer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

#layer-list li {
  padding: 6px 8px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  border: 1px solid transparent;
  color: var(--text-dim);
}
#layer-list li:hover { background: var(--bg-panel-2); }
#layer-list li.active {
  background: var(--bg-panel-2);
  border-color: var(--accent-a);
  color: var(--text);
}

.dims-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.dims-grid label {
  display: flex;
  align-items: center;
  gap: 6px;
}
.dims-grid input { width: 100%; }

#source-details summary {
  cursor: pointer;
  font-size: 12px;
  color: var(--text-dim);
}
#source-details pre {
  background: var(--bg-panel-2);
  border-radius: 8px;
  padding: 8px;
  font-size: 11px;
  max-height: 200px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ---------- Viewport / board ---------- */

#viewport {
  grid-area: viewport;
  position: relative;
  overflow: auto;
  background:
    radial-gradient(circle, rgba(255,255,255,0.06) 1px, transparent 1px) 0 0/24px 24px,
    var(--bg-app);
}

#board {
  position: relative;
  width: 6000px;
  height: 4000px;
  transform-origin: 0 0;
}

.element {
  position: absolute;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}
.element.selected {
  outline: 2px solid var(--accent-a);
  outline-offset: 2px;
}

.element-label {
  position: absolute;
  top: -22px;
  left: 0;
  font-size: 11px;
  color: var(--text-dim);
  white-space: nowrap;
  pointer-events: none;
}

.element-frame {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
  pointer-events: none;
}

.element-overlay {
  position: absolute;
  inset: 0;
  cursor: move;
}

.resize-handle {
  position: absolute;
  right: 2px;
  bottom: 2px;
  width: 12px;
  height: 12px;
  cursor: nwse-resize;
  border-right: 2px solid var(--accent-a);
  border-bottom: 2px solid var(--accent-a);
  opacity: 0;
}
.element.selected .resize-handle,
.element:hover .resize-handle { opacity: 1; }

#zoom-controls {
  position: sticky;
  bottom: 16px;
  left: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
  margin: 16px;
  width: fit-content;
}
#zoom-controls button {
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 22px;
  height: 22px;
  cursor: pointer;
  line-height: 1;
}
#zoom-label { font-size: 12px; color: var(--text-dim); min-width: 38px; }

/* ---------- Login ---------- */

.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: radial-gradient(circle at 30% 20%, #241f33, var(--bg-app));
}

.login-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  width: 300px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.login-logo {
  font-weight: 700;
  font-size: 20px;
  margin-bottom: 8px;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.oauth-link {
  text-align: center;
  font-size: 13px;
  color: var(--text-dim);
  text-decoration: none;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.oauth-link:hover { border-color: var(--accent-a); color: var(--text); }

.login-error {
  color: var(--danger);
  font-size: 12px;
  min-height: 14px;
  margin: 0;
}