.c4it-loop-symbols {
  --c4it-ls-border: #68788e;
  --c4it-ls-muted: #506073;
  --c4it-ls-bg: #f7f9fc;
  --c4it-ls-active: #0f7f75;
  --c4it-ls-accent: #d92525;
  border: 1px solid #d6dde7;
  border-radius: 8px;
  margin: 28px 0;
  padding: 16px;
  background: #fff;
  box-sizing: border-box;
}

.c4it-loop-symbols * {
  box-sizing: border-box;
}

.c4it-loop-symbols__layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.c4it-loop-symbols__panel {
  background: var(--c4it-ls-bg);
  border: 1px solid #d6dde7;
  border-radius: 8px;
  padding: 12px;
}

.c4it-loop-symbols__tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 14px;
}

.c4it-loop-symbols button {
  border: 1px solid #b9c4d4;
  border-radius: 6px;
  background: #fff;
  color: #1e2630;
  font-weight: 700;
  min-height: 38px;
  padding: 7px 10px;
  font-size: 0.92rem;
  cursor: pointer;
  width: 100%;
}

.c4it-loop-symbols button.is-active {
  background: var(--c4it-ls-active);
  border-color: var(--c4it-ls-active);
  color: #fff;
}

.c4it-loop-symbols .c4it-loop-symbols__actions button {
  background: #fff;
  border-color: #b9c4d4;
  color: #1e2630;
}

.c4it-loop-symbols .c4it-loop-symbols__actions button:hover,
.c4it-loop-symbols .c4it-loop-symbols__actions button:focus {
  border-color: var(--c4it-ls-active);
  color: var(--c4it-ls-active);
}

.c4it-loop-symbols__heading {
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 3px solid #777;
  font-size: 1.12rem;
}

.c4it-loop-symbols__controls {
  display: grid;
  gap: 9px;
}

.c4it-loop-symbols label {
  display: grid;
  gap: 6px;
  font-weight: 700;
  color: #202832;
}

.c4it-loop-symbols input,
.c4it-loop-symbols select {
  width: 100%;
  min-height: 42px;
  border: 1px solid #b9c4d4;
  border-radius: 6px;
  padding: 7px 9px;
  background: #fff;
  color: #1e2630;
  font-size: 0.95rem;
}

.c4it-loop-symbols__current {
  border: 1px solid #d6dde7;
  border-radius: 6px;
  padding: 8px 10px;
  background: #fff;
  font-weight: 700;
}

.c4it-loop-symbols__note {
  margin: 2px 0 0;
  color: var(--c4it-ls-muted);
  line-height: 1.55;
  font-size: 0.92rem;
}

.c4it-loop-symbols__actions {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.c4it-loop-symbols__status,
.c4it-loop-symbols__result {
  min-height: 44px;
  margin-top: 10px;
  border: 1px solid #d6dde7;
  border-radius: 6px;
  padding: 8px 10px;
  background: #fff;
  color: #202832;
  line-height: 1.55;
  font-size: 0.92rem;
}

.c4it-loop-symbols__result.is-correct {
  border-color: #0f7f75;
  background: #eefaf8;
}

.c4it-loop-symbols__result.is-wrong {
  border-color: #d69b2d;
  background: #fff8ea;
}

.c4it-loop-symbols__chart {
  min-width: 0;
  overflow-x: auto;
  padding: 0;
}

.c4it-loop-symbols__runner {
  max-width: 520px;
  margin: 0 auto 8px;
}

.c4it-loop-symbols__runner .c4it-loop-symbols__current {
  margin-top: 8px;
  text-align: center;
}

.c4it-loop-symbols__runner .c4it-loop-symbols__actions {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 0;
}

.c4it-loop-symbols__feedback {
  max-width: 520px;
  margin: 8px auto 0;
}

.c4it-loop-symbols__svg {
  display: block;
  width: min(100%, 360px);
  min-width: 0;
  height: auto;
  margin: 0 auto;
}

.c4it-ls-mode {
  display: none;
}

.c4it-ls-mode.is-visible {
  display: block;
}

.c4it-ls-node rect,
.c4it-ls-node polygon,
.c4it-ls-node path {
  fill: #f8fbff;
  stroke: var(--c4it-ls-border);
  stroke-width: 3;
}

.c4it-ls-node--term rect {
  fill: #eef6ff;
}

.c4it-ls-node--loop path {
  fill: #f4fbf9;
}

.c4it-ls-node text,
.c4it-ls-label,
.c4it-ls-note {
  fill: #1e2630;
  font-size: 18px;
  font-weight: 700;
  text-anchor: middle;
  dominant-baseline: middle;
}

.c4it-ls-note {
  fill: var(--c4it-ls-muted);
  font-size: 15px;
  text-anchor: start;
}

.c4it-ls-line {
  fill: none;
  stroke: var(--c4it-ls-border);
  stroke-width: 3;
  marker-end: url(#c4it-ls-arrow);
}

.c4it-ls-node.is-active rect,
.c4it-ls-node.is-active polygon,
.c4it-ls-node.is-active path {
  stroke: var(--c4it-ls-accent);
  stroke-width: 4;
  fill: #fff1f1;
}

@media (max-width: 840px) {
  .c4it-loop-symbols {
    padding: 14px;
  }

  .c4it-loop-symbols__svg {
    width: 100%;
  }
}

@media (max-width: 720px) {
  .c4it-loop-symbols__layout {
    grid-template-columns: 1fr;
  }

  .c4it-loop-symbols__runner .c4it-loop-symbols__actions {
    grid-template-columns: 1fr;
  }

  .c4it-loop-symbols__svg {
    width: min(100%, 420px);
  }
}