/* -----------------------------------------------------------------------------
 * File: css/chapters/02-03.css
 * Purpose: Chapter-scoped styles for Chapter 02 (Functionality) and
 *          Chapter 03 (Flexible Storage). Extends main.css component
 *          classes; consumes tokens.css exclusively. Loaded after main.css.
 * -------------------------------------------------------------------------- */

/* ============================ Chapter 02: Functionality ============================ */

.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-6);
}

@media (max-width: 800px) {
  .capability-grid { grid-template-columns: minmax(0, 1fr); }
}

.capability-card {
  display: flex;
  flex-direction: column;
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-base) var(--ease-standard),
              box-shadow var(--dur-base) var(--ease-standard),
              border-color var(--dur-base) var(--ease-standard);
}

.capability-card:hover {
  transform: translateY(-2px);
  border-color: var(--c-accent);
  box-shadow: var(--shadow-glow);
}

.capability-card-head {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin-bottom: var(--sp-4);
}

.capability-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border-radius: var(--r-md);
  background: var(--c-accent-soft);
  border: 1px solid var(--c-border);
  color: var(--c-accent);
}

.capability-icon svg { width: 26px; height: 26px; }

.capability-card-head h3 {
  font-size: var(--fs-lg);
  color: var(--c-text-primary);
}

.capability-card-dek {
  color: var(--c-text-secondary);
  font-size: var(--fs-sm);
  margin-bottom: var(--sp-4);
}

.capability-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-top: auto;
}

.capability-list li {
  display: flex;
  align-items: baseline;
  gap: var(--sp-2);
  font-size: var(--fs-sm);
  color: var(--c-text-secondary);
  padding-block: var(--sp-1);
  border-top: 1px solid var(--c-border-soft);
}

.capability-list li:first-child { border-top: none; }

.capability-list .tick {
  color: var(--c-accent);
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
}

.capability-card-foot {
  margin-top: var(--sp-4);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--c-border-soft);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-wrap: wrap;
}

/* Endpoint-count mini stat inside the Portal/Admin summary strip */
.mini-stat-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--sp-4);
  margin-block: var(--sp-8) var(--sp-4);
}

@media (max-width: 640px) {
  .mini-stat-row { grid-template-columns: minmax(0, 1fr); }
}

.mini-stat {
  background: var(--c-bg-tertiary);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: var(--sp-4);
  text-align: center;
}

.mini-stat-number {
  font-family: var(--font-head);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--c-accent);
}

.mini-stat-label {
  font-size: var(--fs-xs);
  color: var(--c-text-secondary);
  margin-top: var(--sp-1);
}

/* Auth/SSO strip */
.auth-strip {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-wrap: wrap;
  margin-top: var(--sp-8);
  padding: var(--sp-4) var(--sp-6);
  background: var(--c-bg-secondary);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  font-size: var(--fs-sm);
  color: var(--c-text-secondary);
}

.auth-strip strong { color: var(--c-text-primary); }

/* ============================ Chapter 03: Flexible Storage ============================ */

/* The 3-band diagram sizing: give the center "table" band visual weight
   via the SVG's own layout (see markup) — this class only governs the
   panel wrapper spacing since .diagram-panel already exists in main.css. */
.storage-diagram-panel svg {
  width: 100%;
  height: auto;
}

.storage-badge-callout {
  fill: var(--c-bg-secondary);
  stroke: var(--c-border);
}

.storage-badge-text {
  fill: var(--c-text-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
}

.storage-column-text {
  fill: var(--c-text-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
}

/* Code panel: config JSON snippet, styled like a terminal/editor block */
.code-panel {
  min-width: 0;
  max-width: 100%;
  background: var(--c-bg-deep);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.code-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-5);
  background: var(--c-bg-tertiary);
  border-bottom: 1px solid var(--c-border);
}

.code-panel-filename {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--c-text-secondary);
}

.code-panel pre {
  margin: 0;
  padding: var(--sp-5) var(--sp-6);
  overflow-x: auto;
  max-width: 100%;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--c-text-secondary);
}

/* .feature-row-media is a main.css grid item with default min-width:auto,
   which won't shrink below the code panel's <pre> min-content width on
   narrow viewports. Force it to shrink with the grid track instead of
   pushing the chapter wider than the viewport (scoped to this chapter's
   code-panel usage only, does not touch main.css). */
.feature-row-media:has(.code-panel) {
  min-width: 0;
}

.code-panel .tok-key { color: var(--c-info); }
.code-panel .tok-string { color: var(--c-accent); }
.code-panel .tok-comment { color: var(--c-text-muted); font-style: italic; }
.code-panel .tok-punct { color: var(--c-text-muted); }

/* Identity / pattern callout cards row (5 cards). Flex + centered wrap so the
   trailing row (2 of 5 at 3-up) centers under the gap instead of leaving a
   ragged empty third slot on the wide layout. Basis matches a 3-column track:
   (100% - 2 gaps) / 3. */
.pattern-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-6);
}

.pattern-grid > .pattern-card {
  flex: 1 1 calc((100% - 2 * var(--sp-6)) / 3);
  min-width: min(280px, 100%);
  max-width: calc((100% - 2 * var(--sp-6)) / 3);
}

@media (max-width: 900px) {
  .pattern-grid > .pattern-card { flex-basis: 100%; max-width: 100%; }
}

.pattern-card {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
}

.pattern-card-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-accent);
  margin-bottom: var(--sp-3);
}

.pattern-card h4 {
  font-size: var(--fs-md);
  color: var(--c-text-primary);
  margin-bottom: var(--sp-3);
}

.pattern-card p {
  color: var(--c-text-secondary);
  font-size: var(--fs-sm);
}

.pattern-card .mono-example {
  display: block;
  margin-top: var(--sp-3);
  padding: var(--sp-2) var(--sp-3);
  background: var(--c-bg-deep);
  border: 1px solid var(--c-border);
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--c-accent);
  word-break: break-word;
}

/* Wow-moment banner */
.wow-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
  flex-wrap: wrap;
  margin-top: var(--sp-12);
  padding: var(--sp-8);
  background: linear-gradient(135deg, var(--c-accent-soft), transparent 70%);
  border: 1px solid var(--c-accent);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-glow);
}

.wow-banner-text h3 {
  font-size: var(--fs-xl);
  color: var(--c-text-primary);
  margin-bottom: var(--sp-2);
}

.wow-banner-text p {
  color: var(--c-text-secondary);
  font-size: var(--fs-sm);
}

.wow-banner-number {
  font-family: var(--font-head);
  font-size: var(--fs-4xl);
  font-weight: 700;
  color: var(--c-accent);
  line-height: 1;
  white-space: nowrap;
}

.wow-banner-number .unit {
  font-size: var(--fs-md);
  color: var(--c-text-secondary);
  font-weight: 600;
}