/* ═══════════════════════════════════════════════════════════════════════════
 * Animation: Blending, State Machines & IK · tutorial-specific styles
 * Reuses the shared tokens + scaffold from tutorial.css.
 * ═══════════════════════════════════════════════════════════════════════════ */

.series-banner {
  display: flex; align-items: center; flex-wrap: wrap; gap: 0.6rem 1rem;
  margin: 0 0 2rem; padding: 0.6rem 0.9rem;
  border: 1px solid var(--tut-border); border-left: 3px solid var(--tut-accent);
  border-radius: 10px; background: var(--tut-surface); font-size: 0.86rem;
}
.series-banner-link { color: var(--tut-accent); text-decoration: none; font-weight: 600; }
.series-banner-link:hover { text-decoration: underline; }
.series-banner-mid { color: var(--tut-text); font-weight: 600; }
.series-banner-next { color: var(--tut-accent); margin-left: auto; text-decoration: none; font-weight: 600; }
.series-banner-next:hover { text-decoration: underline; }

.tight-list { margin: 0.8rem 0; padding-left: 1.4rem; display: grid; gap: 0.4rem; }
.tight-list li { line-height: 1.5; color: var(--tut-soft); }
.tight-list li strong { color: var(--tut-text); }
.num-list { margin: 0.8rem 0; padding-left: 1.5rem; display: grid; gap: 0.35rem; }
.num-list li { line-height: 1.5; color: var(--tut-soft); }
.num-list li strong { color: var(--tut-text); }

.formula {
  margin: 1rem 0; padding: 0.8rem 1rem; text-align: center;
  font-family: var(--mono); font-size: 0.92rem; color: var(--tut-text);
  background: var(--tut-surface); border: 1px solid var(--tut-border-soft); border-radius: 10px;
  overflow-x: auto;
}

.tut-widget {
  margin: 1.5rem 0; padding: 0.9rem;
  border: 1px solid var(--tut-border); border-radius: 14px;
  background: linear-gradient(180deg, var(--tut-surface), var(--tut-surface-2));
}
.tut-widget canvas {
  display: block; width: 100%; aspect-ratio: 16 / 9; max-height: 460px;
  background: var(--tut-bg); border: 1px solid var(--tut-border-soft); border-radius: 10px;
}
#widget-blend2d canvas, #widget-fabrik canvas { cursor: crosshair; }
.widget-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem 1rem; margin-bottom: 0.8rem; }
.widget-controls label { display: inline-flex; align-items: center; gap: 0.45rem; font-size: 0.82rem; color: var(--tut-soft); }
.widget-controls input[type="range"] { accent-color: var(--tut-accent); width: 6rem; max-width: 30vw; }
.widget-controls input[type="checkbox"] { accent-color: var(--tut-accent); }
.widget-hint { font-size: 0.78rem; color: var(--tut-muted); }

.widget-btn {
  font-family: var(--mono); font-size: 0.74rem; color: var(--tut-text);
  background: var(--tut-surface-2); border: 1px solid var(--tut-border); border-radius: 8px;
  padding: 0.35rem 0.7rem; cursor: pointer; transition: border-color 0.12s ease, color 0.12s ease;
}
.widget-btn:hover { border-color: var(--tut-accent); color: var(--tut-accent); }

.widget-toggle { display: inline-flex; border: 1px solid var(--tut-border); border-radius: 8px; overflow: hidden; flex-wrap: wrap; }
.widget-toggle button {
  font-family: var(--mono); font-size: 0.72rem; color: var(--tut-muted);
  background: var(--tut-surface-2); border: none; border-right: 1px solid var(--tut-border);
  padding: 0.35rem 0.6rem; cursor: pointer; transition: color 0.12s ease, background 0.12s ease;
}
.widget-toggle button:last-child { border-right: none; }
.widget-toggle button:hover { color: var(--tut-text); }
.widget-toggle button.active { color: var(--tut-bg); background: var(--tut-accent); font-weight: 600; }

.callout.is-warn { border-left: 3px solid var(--tut-warn); }
.callout.is-warn .callout-title { color: var(--tut-warn); }
.callout.is-info { border-left: 3px solid var(--tut-info); }
.callout.is-info .callout-title { color: var(--tut-info); }
.quiz-note { font-size: 0.82rem; color: var(--tut-muted); font-style: italic; margin-top: 0.5rem; }

.pitfall-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 0.7rem; margin: 1.2rem 0; }
.pitfall { display: flex; flex-direction: column; gap: 0.25rem; padding: 0.75rem 0.9rem; border-left: 3px solid var(--tut-danger); border-radius: 0 8px 8px 0; background: var(--tut-surface); }
.pitfall strong { color: var(--tut-text); font-size: 0.9rem; }
.pitfall span { color: var(--tut-muted); font-size: 0.82rem; line-height: 1.45; }

@media (max-width: 560px) {
  .series-banner-next { margin-left: 0; }
  .tut-widget canvas { aspect-ratio: 4 / 3; max-height: none; }
  .pitfall-grid { grid-template-columns: 1fr; }
}