/* ============================================================
   Design Architecture — page-specific styles
   Base styles, variables, and dark mode come from ../shared/styles.css
   ============================================================ */

/* --- Tier colors (page-specific tokens) --- */
:root {
  --tier1: var(--secondary);
  --tier2: var(--accent);
  --tier3: var(--success);
}
.dark {
  --tier1: #C76B6B;
  --tier3: #7A9E70;
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border);
  margin-bottom: 1.5rem;
  overflow-x: auto;
}
.tab-btn {
  padding: .6rem 1.2rem;
  border: none;
  background: none;
  color: var(--muted);
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
  font-size: .9rem;
  font-family: var(--font-heading);
  transition: color .15s, border-color .15s;
}
.tab-btn:hover { color: var(--fg); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* --- File cards (Skill Files tab) --- */
.file-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: .75rem;
  box-shadow: var(--shadow);
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.file-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}
.file-card.tier1 { border-left: 4px solid var(--tier1); }
.file-card.tier2 { border-left: 4px solid var(--tier2); }
.file-card.tier3 { border-left: 4px solid var(--tier3); }

.file-card h3, .template-card h3 { font-family: var(--font-heading); }

.file-header {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: .4rem;
  flex-wrap: wrap;
}
.tier-badge {
  display: inline-block;
  padding: .1rem .45rem;
  border-radius: 3px;
  color: #fff;
  font-size: .7rem;
  font-weight: 700;
}
.token-badge {
  margin-left: auto;
  font-size: .75rem;
  color: var(--muted);
  background: var(--code-bg);
  padding: .1rem .4rem;
  border-radius: 3px;
}
.file-purpose { font-size: .88rem; color: var(--muted); margin-bottom: .5rem; }
.file-meta { font-size: .82rem; margin-bottom: .35rem; }
.design-ref { color: var(--accent); }
.design-sections { display: block; font-size: .78rem; color: var(--muted); margin-top: .15rem; }
.file-triggers, .file-workflows { font-size: .82rem; margin-bottom: .25rem; }
.trigger-tag {
  display: inline-block;
  padding: .1rem .4rem;
  border-radius: 3px;
  background: var(--accent-light);
  color: var(--accent);
  font-size: .72rem;
  margin: .1rem .15rem;
}
.section-tag {
  display: inline-block;
  padding: .1rem .4rem;
  border-radius: 3px;
  background: var(--code-bg);
  font-size: .72rem;
  margin: .1rem .1rem;
  color: var(--muted);
}
.tier-heading {
  font-size: 1.1rem;
  margin: 1.5rem 0 .75rem;
  padding-bottom: .4rem;
  border-bottom: 1px solid var(--border);
}
.tier-heading .count { font-size: .8rem; color: var(--muted); font-weight: 400; }

/* --- Template grid --- */
.template-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: .75rem;
}
.template-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .9rem 1rem;
  box-shadow: var(--shadow);
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.template-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}
.template-header { display: flex; align-items: center; gap: .5rem; margin-bottom: .4rem; }
.cat-badge {
  display: inline-block;
  padding: .1rem .45rem;
  border-radius: 3px;
  color: #fff;
  font-size: .7rem;
  font-weight: 700;
}
.template-meta { font-size: .82rem; color: var(--muted); display: flex; gap: 1rem; margin-bottom: .25rem; }
.template-design { font-size: .75rem; color: var(--accent); }

/* --- Adapter grid --- */
.adapter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: .75rem;
}
.adapter-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .9rem 1rem;
  box-shadow: var(--shadow);
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.adapter-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}
.adapter-card p { font-size: .85rem; color: var(--muted); margin: .3rem 0; }
.budget-badge {
  font-size: .75rem;
  background: var(--accent-light);
  color: var(--accent);
  padding: .1rem .4rem;
  border-radius: 3px;
}
.adapter-design { font-size: .72rem; color: var(--accent); margin-top: .3rem; }

/* --- Token budget --- */
.budget-breakdown { margin-bottom: 1rem; }
.budget-row {
  padding: .3rem 0;
  font-size: .9rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.budget-total {
  margin-top: .5rem;
  padding-top: .5rem;
  border-top: 1px solid var(--border);
  font-size: .95rem;
}
.budget-bar {
  display: flex;
  height: 2rem;
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-top: .5rem;
}
.budget-bar > div {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: .75rem;
  font-weight: 700;
}

/* --- Mermaid diagram container --- */
#framework-diagram {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  min-height: 200px;
  overflow-x: auto;
  box-shadow: var(--shadow);
}

/* --- Responsive --- */
@media (max-width: 640px) {
  .template-grid, .adapter-grid { grid-template-columns: 1fr; }
  .tabs { gap: 0; }
  .tab-btn { padding: .5rem .75rem; font-size: .82rem; }
}