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

:root {
  --bg: var(--ui-bg);
  --surface: var(--ui-surface);
  --surface2: var(--ui-surface-3);
  --border: var(--ui-border);
  --text: var(--ui-text);
  --muted: var(--ui-muted);
  --accent: var(--ui-accent);
  --accent2: var(--ui-accent-2);
  --success: var(--ui-ok);
  --rad: var(--ui-radius-sm);
}

body {
  font-family: var(--ui-font);
  background: var(--bg);
  color: var(--text);
  min-height: calc(100vh - var(--ui-bar-h, 0px));
  display: flex;
  flex-direction: column;
}

/* HEADER */
.app-header {
  padding: .9rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.header-brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--accent2);
}
.header-brand i { color: var(--accent); }
.header-sub { font-size: .8rem; color: var(--muted); }

/* LAYOUT */
.app-layout {
  display: grid;
  grid-template-columns: 260px 1fr 280px;
  gap: 0;
  flex: 1;
  overflow: hidden;
  height: calc(100vh - 60px - var(--ui-bar-h));
}

.panel {
  overflow-y: auto;
  border-right: 1px solid var(--border);
  padding: 1rem;
}
.panel-output { border-right: none; }

/* CTRL SECTION */
.ctrl-section {
  margin-bottom: 1.2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--rad);
  padding: .85rem;
}
.ctrl-title {
  font-size: .8rem;
  font-weight: 700;
  color: var(--accent2);
  letter-spacing: .04em;
  display: flex;
  align-items: center;
  gap: .4rem;
  margin-bottom: .75rem;
}
.form-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  margin-bottom: .5rem;
  font-size: .8rem;
}
.form-row label:first-child { color: var(--muted); flex-shrink: 0; width: 90px; }
.form-row input[type="text"],
.form-row input[type="number"],
.form-row input[type="url"],
.form-row select {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 4px 8px;
  font-size: .8rem;
  flex: 1;
  min-width: 0;
}
.form-row input[type="color"] {
  width: 36px; height: 28px;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  background: none;
}
.iter-row { display: flex; align-items: center; gap: .5rem; flex: 1; }
.iter-row input { flex: 1; }
.chk-label { display: flex; align-items: center; gap: .3rem; color: var(--muted); font-size: .78rem; white-space: nowrap; cursor: pointer; }

/* PRESETS */
.presets-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
}
.preset-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 5px 8px;
  font-size: .75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
}
.preset-btn:hover { border-color: var(--accent); color: var(--accent); }

/* PREVIEW */
.panel-main {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0;
  border-right: 1px solid var(--border);
}
.preview-area {
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .6rem;
  background: var(--surface);
}
.preview-label { font-size: .72rem; font-weight: 700; color: var(--muted); letter-spacing: .06em; align-self: flex-start; }
.preview-stage {
  width: 100%;
  height: 200px;
  background: repeating-conic-gradient(rgba(255,255,255,.03) 0% 25%, transparent 0% 50%) 0 0 / 24px 24px;
  border-radius: var(--rad);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}
.preview-element {
  width: 80px; height: 80px;
  background: var(--accent);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: .9rem;
  overflow: hidden;
}
.preview-element img { width: 100%; height: 100%; object-fit: cover; }
.preview-controls {
  display: flex;
  gap: .5rem;
}
.icon-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  width: 34px; height: 34px;
  border-radius: 8px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: .85rem;
  transition: all .15s;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }

/* KEYFRAME EDITOR */
.keyframe-editor {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
}
.kf-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: .75rem;
}
.btn-add-kf {
  background: var(--accent);
  border: none;
  color: #fff;
  border-radius: 8px;
  padding: 5px 12px;
  font-size: .78rem;
  font-weight: 700;
  cursor: pointer;
  display: flex; align-items: center; gap: .3rem;
  transition: opacity .15s;
}
.btn-add-kf:hover { opacity: .85; }
.kf-list { display: flex; flex-direction: column; gap: .6rem; }

/* Individual keyframe card */
.kf-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--rad);
  padding: .75rem .85rem;
}
.kf-card-header {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: .6rem;
}
.kf-pct-label { font-size: .75rem; color: var(--muted); }
.kf-pct-input {
  width: 64px;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 3px 7px;
  font-size: .8rem;
}
.kf-pct-input:focus { border-color: var(--accent); outline: none; }
.kf-del-btn {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: .8rem;
  padding: 2px 6px;
  border-radius: 4px;
  transition: color .15s;
}
.kf-del-btn:hover { color: #ef4444; }
.kf-props {
  display: flex;
  flex-direction: column;
  gap: .35rem;
}
.kf-prop-row {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: .78rem;
}
.kf-prop-select {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 3px 6px;
  font-size: .78rem;
  flex-shrink: 0;
  width: 110px;
}
.kf-prop-val {
  flex: 1;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 3px 7px;
  font-size: .78rem;
  min-width: 0;
}
.kf-prop-val:focus, .kf-prop-select:focus { border-color: var(--accent); outline: none; }
.kf-prop-del {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: .72rem;
  padding: 2px 4px;
  border-radius: 4px;
  transition: color .15s;
}
.kf-prop-del:hover { color: #ef4444; }
.kf-add-prop {
  font-size: .73rem;
  color: var(--accent);
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px 0;
  margin-top: 4px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: .25rem;
}
.kf-add-prop:hover { text-decoration: underline; }

/* OUTPUT */
.panel-output { display: flex; flex-direction: column; }
.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: .75rem;
  flex-shrink: 0;
}
.output-btns { display: flex; gap: .4rem; }
.css-output {
  flex: 1;
  overflow-y: auto;
  font-family: 'Courier New', monospace;
  font-size: .76rem;
  line-height: 1.7;
  color: #a5d6ff;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--rad);
  padding: .85rem;
  white-space: pre;
  word-break: break-all;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--success);
  color: #fff;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: .82rem;
  font-weight: 700;
  z-index: 999;
  transition: transform .3s ease;
  pointer-events: none;
}
.toast.show { transform: translateX(-50%) translateY(0); }