/*
 * Content Rail
 * L-shaped section divider with vertical left border + horizontal top borders.
 * Used for course outlines, workshop listings, and similar sequential content.
 */

@layer components {
  .content-rail {
    --rail-color: var(--color-gray-medium);
    --rail-width: 1px;
    --rail-radius: var(--radius);

    position: relative;
    padding-block-end: calc(var(--block-space) * 4);
  }

  /* Continuous vertical line — no gaps possible */
  .content-rail::before {
    content: "";
    position: absolute;
    left: 0;
    top: var(--rail-radius);
    bottom: 0;
    width: var(--rail-width);
    background-color: var(--rail-color);
  }

  .content-rail__section {
    position: relative;
    border-top: var(--rail-width) solid var(--rail-color);
    border-left: var(--rail-width) solid var(--rail-color);
    border-top-left-radius: var(--rail-radius);
    padding-inline-start: clamp(var(--block-space), 4vw, calc(var(--block-space) * 2.5));
    padding-block: var(--block-space-double);
  }

  .content-rail__section:last-child {
    padding-block-end: 0;
  }

  /* First section: extend top line to the right */
  .content-rail__section:first-child::before {
    content: "";
    position: absolute;
    top: calc(-1 * var(--rail-width));
    left: 100%;
    height: var(--rail-width);
    width: 100vw;
    background-color: var(--rail-color);
  }

  /* Section header (optional) */
  .content-rail__header {
    margin-block-end: var(--block-space);
  }

  .content-rail__title {
    font-size: var(--text-medium);
    /* text-transform: uppercase; */
    /* letter-spacing: var(--tracking-wider); */
    color: var(--color-gray-darker);
    margin-block-end: var(--block-space-quarter);
  }

  .content-rail__desc {
    font-size: var(--text-normal);
    color: var(--color-gray);
    line-height: var(--leading-relaxed);
  }
}