/**
 * Component: Intelligence Workflow
 *
 * Institutional representation of the D1 intelligence pipeline:
 * Input → Analysis → Output.
 */

@layer components {
  /* ==========================================================================
     1. Root
     ========================================================================== */

  .dig-process-steps {
    padding-block: var(--dig-section-space);

    background-color: var(--dig-color-bg);
    border-block: 1px solid var(--dig-color-border-subtle);
  }

  /* ==========================================================================
     2. Header
     ========================================================================== */

  .dig-process-steps__header {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: end;

    margin-bottom: clamp(3rem, 5vw, 4.5rem);
  }

  .dig-process-steps__eyebrow {
    grid-column: 1;

    margin: 0;
    padding-right: clamp(1.5rem, 3vw, 3rem);

    color: var(--dig-color-text);

    font-family: var(--dig-font-mono);
    font-size: var(--dig-font-size-xs);
    font-weight: var(--dig-font-weight-semibold);
    line-height: 1;
    letter-spacing: var(--dig-letter-spacing-mono);
    text-transform: uppercase;
  }

  .dig-process-steps__title {
    grid-column: 2 / 4;

    max-width: 48rem;
    margin: 0;

    color: var(--dig-color-primary);

    font-family: var(--dig-font-primary);
    font-size: clamp(2.25rem, 3.6vw, 3.75rem);
    font-weight: var(--dig-font-weight-bold);
    line-height: var(--dig-line-height-tight);
    letter-spacing: var(--dig-letter-spacing-tight);
    text-align: left;
    text-wrap: balance;
  }

  /* ==========================================================================
     3. Pipeline
     ========================================================================== */

  .dig-process-steps__pipeline {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));

    margin: 0;
    padding: 0;

    border-top: 1px solid var(--dig-color-border);
    border-bottom: 1px solid var(--dig-color-border);

    list-style: none;
  }

  .dig-process-step {
    position: relative;

    display: grid;
    grid-template-rows: auto 1fr;

    min-width: 0;
    min-height: clamp(23rem, 28vw, 28rem);
  }

  .dig-process-step:not(:last-child) {
    border-right: 1px solid var(--dig-color-border);
  }

  /* ==========================================================================
     4. Pipeline Rail
     ========================================================================== */

  .dig-process-step__rail {
    position: relative;

    display: flex;
    align-items: center;

    min-height: clamp(7rem, 9vw, 9rem);
    padding-inline: clamp(1.5rem, 3vw, 2.5rem);
  }

  /*
   * Continuous system line.
   *
   * No arrowheads: this is an institutional processing pipeline,
   * not a setup wizard.
   */
  .dig-process-step__rail::after {
    content: "";

    position: absolute;
    z-index: 0;
    top: 50%;
    right: 0;
    left: 0;

    height: 1px;

    background: color-mix(
      in srgb,
      var(--dig-color-secondary) 55%,
      var(--dig-color-border)
    );
  }

  .dig-process-step:first-child .dig-process-step__rail::after {
    left: clamp(1.5rem, 3vw, 2.5rem);
    top: 50%;
  }

  .dig-process-step:last-child .dig-process-step__rail::after {
    right: calc(100% - clamp(4rem, 5vw, 5rem));
    bottom: 50%;
  }

  .dig-process-step__node {
    position: relative;
    z-index: 1;

    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: clamp(2.5rem, 2.3rem + 0.6vw, 2.875rem);
    height: clamp(2.5rem, 2.3rem + 0.6vw, 2.875rem);

    background-color: var(--dig-color-bg);
    border: 1px solid var(--dig-color-border);
    border-radius: var(--dig-radius-md);

    color: var(--dig-color-primary);

    font-family: var(--dig-font-mono);
    font-size: var(--dig-font-size-xs);
    font-weight: var(--dig-font-weight-bold);
    line-height: 1;
    letter-spacing: var(--dig-letter-spacing-label);
  }

  /*
   * Small cyan system marker.
   * It identifies pipeline nodes without implying an active/current step.
   */
  .dig-process-step__node::after {
    content: "";

    position: absolute;
    top: -0.22rem;
    right: -0.22rem;

    width: 0.4rem;
    height: 0.4rem;

    background-color: var(--dig-color-secondary);
    border: 2px solid var(--dig-color-bg);
    border-radius: var(--dig-radius-full);
  }

  /* ==========================================================================
     5. Stage Content
     ========================================================================== */

  .dig-process-step__content {
    display: flex;
    flex-direction: column;

    padding: clamp(2rem, 8vw, 3rem) var(--dig-spacing-sm)
      clamp(2.125rem, 7vw, 3rem);
  }

  .dig-process-step__role {
    margin: 0 0 clamp(1rem, 1.8vw, 1.35rem);

    color: var(--dig-color-text-muted);

    font-family: var(--dig-font-mono);
    font-size: var(--dig-font-size-xs);
    font-weight: var(--dig-font-weight-semibold);
    line-height: 1;
    letter-spacing: var(--dig-letter-spacing-mono);
    text-transform: uppercase;
  }

  .dig-process-step__title {
    max-width: 21rem;
    margin: 0 0 clamp(1rem, 2vw, 1.35rem);

    color: var(--dig-color-primary);

    font-family: var(--dig-font-primary);
    font-size: clamp(1.125rem, 1.02rem + 0.4vw, 1.375rem);
    font-weight: var(--dig-font-weight-bold);
    line-height: 1.3;
    letter-spacing: var(--dig-letter-spacing-heading);
    text-wrap: balance;
  }

  .dig-process-step__text {
    max-width: 34ch;
    margin: 0;

    color: var(--dig-color-text-muted);

    font-size: clamp(0.9rem, 0.86rem + 0.15vw, 0.975rem);
    line-height: var(--dig-line-height-body);
    text-wrap: pretty;
  }

  /* ==========================================================================
     6. Mobile Pipeline
     ========================================================================== */

  @media (max-width: 48rem) {
    .dig-process-steps__header {
      grid-template-columns: 1fr;
      gap: var(--dig-spacing-md);

      margin-bottom: clamp(2.75rem, 9vw, 4rem);
    }

    .dig-process-steps__eyebrow,
    .dig-process-steps__title {
      grid-column: 1;
    }

    .dig-process-steps__title {
      max-width: 32rem;

      font-size: clamp(2rem, 9vw, 3rem);
    }

    .dig-process-steps__pipeline {
      grid-template-columns: 1fr;

      border-top: 1px solid var(--dig-color-border);
    }

    .dig-process-step {
      grid-template-columns: clamp(3.5rem, 14vw, 4.5rem) minmax(0, 1fr);
      grid-template-rows: auto;

      min-height: auto;
    }

    .dig-process-step:not(:last-child) {
      border-right: 0;
      border-bottom: 1px solid var(--dig-color-border);
    }

    .dig-process-step__rail {
      align-items: flex-start;
      justify-content: center;

      min-height: 100%;
      padding: clamp(2rem, 8vw, 3rem) 0;
    }

    .dig-process-step__rail::after {
      top: 0;
      right: auto;
      bottom: 0;
      left: 50%;

      width: 1px;
      height: auto;
    }

    .dig-process-step:first-child .dig-process-step__rail::after {
      top: clamp(2rem, 8vw, 3rem);
      left: 50%;
    }

    .dig-process-step:last-child .dig-process-step__rail::after {
      right: auto;
      bottom: calc(100% - clamp(4.5rem, 16vw, 5.5rem));
    }

    .dig-process-step__content {
      padding: clamp(2rem, 8vw, 3rem) var(--dig-spacing-sm)
        clamp(2.5rem, 9vw, 3.5rem);
    }

    .dig-process-step__text {
      max-width: 38rem;
    }
  }

  /* ==========================================================================
     7. Motion Preferences
     ========================================================================== */

  @media (prefers-reduced-motion: no-preference) {
    .dig-process-step__node {
      transition:
        border-color var(--dig-transition-fast),
        color var(--dig-transition-fast);
    }

    .dig-process-step:hover .dig-process-step__node {
      border-color: var(--dig-color-secondary);
      color: var(--dig-color-secondary-dark);
    }
  }
}