/* app.css — layout and components for Motion Editor */

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Body ── */
body {
  background: var(--paper-0);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 13px;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Header ── */
header {
  flex: 0 0 44px;
  background: var(--header-bg);
  color: var(--paper-0);
  padding: 0 var(--s4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.header-title {
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.03em;
}

.hub-link {
  color: var(--paper-0);
  opacity: 0.55;
  text-decoration: none;
  font-size: 12px;
  transition: opacity 0.15s;
}
.hub-link:hover { opacity: 1; }

/* ── Workspace (stage + side panel) ── */
.workspace {
  flex: 1 1 0;
  display: flex;
  min-height: 0;
}

/* ── Stage panel ── */
.stage-panel {
  flex: 0 0 auto;
  background: var(--paper-0);
  border-right: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--s3);
}

#stage {
  position: relative;
  width: 380px;
  height: 260px;
  background: var(--paper-1);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  flex-shrink: 0;
}

/* Grid overlay for the stage */
#stage::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  opacity: 0.5;
}

.stage-node {
  position: absolute;
  border-radius: 2px;
  cursor: pointer;
  /* ⚠ NO CSS transitions — JS sample() is source of truth */
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.stage-node.selected {
  outline: 2px solid var(--rust);
  outline-offset: 2px;
  z-index: 10;
}

/* ── Side panel ── */
.side-panel {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 200px;
  overflow-y: auto;
}

.panel-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--s1);
}

/* Node list */
.node-list {
  padding: var(--s2) var(--s3);
  border-bottom: 1px solid var(--border);
}

.node-item {
  display: flex;
  align-items: center;
  gap: var(--s1);
  padding: 5px var(--s1);
  border-radius: var(--r);
  cursor: pointer;
  margin-bottom: 2px;
  font-size: 12px;
}
.node-item:hover { background: rgba(0,0,0,0.04); }
.node-item.selected {
  background: rgba(180, 69, 26, 0.1);
  color: var(--rust);
  font-weight: 500;
}

.node-swatch {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  flex-shrink: 0;
  border: 1px solid rgba(0,0,0,0.15);
}

/* Keyframe panel */
.kf-panel {
  padding: var(--s2) var(--s3);
  border-bottom: 1px solid var(--border);
}

.kf-actions {
  display: flex;
  gap: var(--s1);
  margin-bottom: var(--s1);
  flex-wrap: wrap;
  align-items: center;
}

.kf-row {
  display: flex;
  align-items: center;
  gap: var(--s1);
  margin-bottom: var(--s1);
}

.kf-row-label {
  font-size: 11px;
  color: var(--muted);
  width: 32px;
  flex-shrink: 0;
}

.ease-select {
  background: var(--paper-0);
  border: 1px solid var(--border);
  border-radius: var(--r);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 12px;
  padding: 3px 6px;
  cursor: pointer;
}
.ease-select:disabled { opacity: 0.4; cursor: default; }

.stagger-input {
  background: var(--paper-0);
  border: 1px solid var(--border);
  border-radius: var(--r);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 3px 6px;
  width: 64px;
  text-align: right;
}
.stagger-input:disabled { opacity: 0.4; cursor: default; }
.stagger-input:focus { outline: 2px solid var(--rust); outline-offset: 1px; }

.kf-row-unit {
  font-size: 11px;
  color: var(--muted);
}

.kf-info {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  min-height: 16px;
  word-break: break-all;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--paper-0);
  border: 1px solid var(--border);
  border-radius: var(--r);
  color: var(--text);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 12px;
  padding: 4px 10px;
  white-space: nowrap;
  transition: background 0.1s;
  line-height: 1;
}
.btn:hover  { background: #d8d0c4; }
.btn:active { background: #cdc4b8; }
.btn:disabled,
.btn[disabled] { opacity: 0.38; cursor: default; pointer-events: none; }

.btn-play {
  font-size: 15px;
  padding: 4px 9px;
  min-width: 34px;
}

/* ── Timeline section ── */
.timeline-section {
  flex: 0 0 auto;
  border-top: 1px solid var(--border);
  background: var(--paper-1);
}

/* Timeline toolbar */
.tl-toolbar {
  display: flex;
  align-items: center;
  gap: var(--s1);
  padding: 0 var(--s3);
  height: 40px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.time-display {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text);
  opacity: 0.75;
  min-width: 72px;
}

#scrubRange {
  flex: 1 1 60px;
  min-width: 40px;
  accent-color: var(--rust);
  cursor: pointer;
}

.tl-sep {
  width: 1px;
  height: 20px;
  background: var(--border);
  flex-shrink: 0;
}

/* The import label looks like a button */
.import-label {
  cursor: pointer;
}

/* Timeline canvas */
#timeline {
  display: block;
  width: 100%;
  cursor: crosshair;
  user-select: none;
  -webkit-user-select: none;
}