/* ============================================================
   Starlight Brand Guidelines — Placeholder & Section Styles
   ============================================================ */

/* --- Placeholder System --- */
.brand-placeholder {
  margin-bottom: 16px;
}

.placeholder-frame {
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: 6px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Blueprint grid overlay */
.placeholder-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 19px, rgba(255,255,255,0.015) 19px, rgba(255,255,255,0.015) 20px),
    repeating-linear-gradient(90deg, transparent, transparent 19px, rgba(255,255,255,0.015) 19px, rgba(255,255,255,0.015) 20px);
  pointer-events: none;
}

.placeholder-inner {
  text-align: center;
  z-index: 1;
  padding: 24px;
}

.placeholder-icon {
  display: block;
  font-size: 24px;
  color: var(--color-text-faint);
  margin-bottom: 8px;
  opacity: 0.5;
}

.placeholder-label {
  font-family: var(--font-display);
  font-size: 8px;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
}

.placeholder-desc {
  display: block;
  font-size: 11px;
  color: var(--color-text-muted);
  margin-top: 6px;
}

/* Prompt panel */
.prompt-toggle {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 10px;
  padding: 3px 10px;
  border-radius: 3px;
  cursor: pointer;
  margin-top: 8px;
  transition: all 0.15s;
}

.prompt-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.prompt-panel {
  margin-top: 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 12px;
}

.ai-prompt {
  font-size: 11px;
  color: var(--color-text-dim);
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: 'SF Mono', 'Fira Code', monospace;
  margin-bottom: 8px;
}

.copy-prompt {
  background: var(--color-accent);
  color: #fff;
  border: none;
  font-size: 10px;
  padding: 4px 12px;
  border-radius: 3px;
  cursor: pointer;
  transition: opacity 0.15s;
}

.copy-prompt:hover { opacity: 0.85; }
.copy-prompt.copied { background: var(--color-success); }

/* --- Architecture diagram --- */
.arch-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 32px;
}

.arch-tier {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.arch-box {
  padding: 12px 24px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-align: center;
}

.arch-box--parent {
  border-color: var(--color-text-faint);
  color: var(--color-text-dim);
}

.arch-box--brand {
  border-color: var(--color-accent);
  color: var(--color-text);
  background: rgba(1,192,226,0.08);
}

.arch-box--sub {
  border-color: var(--color-border-light);
  color: var(--color-text-muted);
  font-size: 13px;
}

.arch-connector {
  width: 1px;
  height: 20px;
  background: rgba(255,255,255,0.15);
}

.arch-branch {
  width: 200px;
  height: 1px;
  background: rgba(255,255,255,0.15);
}

/* --- Clear space diagram --- */
.clearspace-diagram {
  position: relative;
  display: inline-block;
  padding: 40px;
}

.clearspace-boundary {
  border: 1px dashed var(--color-accent);
  padding: 40px;
  border-radius: 4px;
  position: relative;
}

.clearspace-label {
  position: absolute;
  font-family: var(--font-display);
  font-size: 10px;
  color: var(--color-accent);
}

/* --- Background usage panels --- */
.bg-usage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.bg-usage-panel {
  border-radius: 4px;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80px;
}

.bg-usage-panel img {
  max-height: 30px;
  width: auto;
}

.bg-usage-label {
  font-size: 10px;
  margin-top: 6px;
}

.bg-usage-label--ok { color: var(--color-success); }
.bg-usage-label--no { color: var(--color-danger); }

/* --- Voice tone examples --- */
.voice-example {
  padding: 16px;
  border-left: 2px solid var(--color-accent);
  margin-bottom: 16px;
  background: var(--color-surface);
  border-radius: 0 4px 4px 0;
}

.voice-example-label {
  font-family: var(--font-display);
  font-size: 8px;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.voice-example-text {
  font-size: 13px;
  color: var(--color-text-dim);
  line-height: 1.6;
  font-style: italic;
}

/* --- Social template specs --- */
.template-spec {
  padding: 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.template-name {
  font-family: var(--font-display);
  font-size: 9px;
  color: var(--color-text);
  margin-bottom: 4px;
}

.template-dims {
  font-size: 11px;
  color: var(--color-accent);
  margin-bottom: 2px;
}

.template-note {
  font-size: 10px;
  color: var(--color-text-faint);
}

/* --- Product spec cards --- */
.product-card {
  padding: 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
}

.product-card-name {
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 4px;
}

.product-card-tagline {
  font-size: 12px;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.product-card-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.product-spec-item {
  font-size: 11px;
}

.product-spec-value {
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--color-text);
}

.product-spec-label {
  color: var(--color-text-muted);
  font-size: 10px;
}

/* --- Responsive overrides --- */
@media (max-width: 768px) {
  .bg-usage-grid { grid-template-columns: 1fr 1fr; }
}