/* Architecture diagram — CSS grid layout with token-based theming */

.arch-diagram {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto auto;
  gap: var(--space-lg);
  padding: var(--space-lg);
  padding-right: calc(var(--space-lg) + 20px);
}

.arch-diagram__arrows {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  overflow: visible;
}

/* Groups */

.arch-diagram__group {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  padding: var(--space-md);
}

.arch-diagram__group--cdn {
  grid-column: 1 / -1;
}

.arch-diagram__group-title {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-weight: 600;
  font-size: var(--text-base);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.arch-diagram__group-title app-icon {
  color: var(--color-text-muted);
}

/* Checkout label area below API group */

.arch-diagram__checkout-label {
  grid-column: 2;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-warning);
  justify-content: flex-end;
  padding-right: var(--space-sm);
}

/* Nodes */

.arch-diagram__node {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text);
}

.arch-diagram__node--checkout {
  border-color: var(--color-warning);
  background: color-mix(in srgb, var(--color-warning) 8%, var(--color-surface));
  font-weight: 600;
  color: var(--color-warning-hover);
}

/* Left column: DB group + rebuild, stretched to match API height */

.arch-diagram__left {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-sm);
}

/* API stack */

.arch-diagram__api-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

/* CDN row */

.arch-diagram__cdn-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
}

/* Mobile flow labels — hidden on desktop */

.arch-diagram__flow-label {
  display: none;
}

/* Mobile */
@media (max-width: 639px) {
  .arch-diagram {
    grid-template-columns: 1fr;
    padding: var(--space-md) var(--space-md) var(--space-md) calc(var(--space-md) + 14px);
    gap: 0;
  }

  .arch-diagram__arrows {
    display: none;
  }

  .arch-diagram__checkout-label {
    display: none;
  }

  .arch-diagram__cdn-row {
    grid-template-columns: 1fr;
  }

  /* Remove group backgrounds/borders on mobile — flatten everything */
  .arch-diagram__group,
  .arch-diagram__left {
    border: none;
    background: none;
    border-radius: 0;
    padding: 0;
    border-left: 2px solid var(--color-border);
    padding-left: var(--space-md);
    margin: 0;
  }

  .arch-diagram__group--cdn {
    border-left-color: var(--color-warning);
  }

  .arch-diagram__group-title {
    margin-bottom: var(--space-sm);
  }

  /* Flow labels with CSS arrow on the left border */
  .arch-diagram__flow-label {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    padding: var(--space-sm) 0 var(--space-sm) var(--space-md);
    border-left: 2px solid var(--color-border);
    position: relative;
  }

  .arch-diagram__flow-label--gold {
    color: var(--color-warning);
    border-left-color: var(--color-warning);
  }

  /* CSS triangle arrow on the border */
  .arch-diagram__flow-label::before {
    content: '';
    position: absolute;
    left: -7px;
    width: 0;
    height: 0;
    border-left: 6px solid var(--color-border);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
  }

  .arch-diagram__flow-label--gold::before {
    border-left-color: var(--color-warning);
  }
}