/* ============================================================
   v1.24 page-specific styles
   RP2350 chip diagram with ARM/RISC-V toggle, ipconfig
   side-by-side, MCU spec cards (mirrors v1.26/v1.27 pattern),
   language picker.
   ============================================================ */

/* ===== RP2350 architecture toggle ===== */
.rp-arch-toggle {
  display: inline-flex;
  background: var(--bg-tertiary);
  border-radius: 8px;
  padding: 3px;
  margin-bottom: 20px;
}
.rp-arch-toggle button {
  padding: 8px 18px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}
.rp-arch-toggle button.active {
  background: var(--accent);
  color: #fff;
}

.rp-stage {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
}

.rp-svg {
  width: 100%;
  height: 240px;
  display: block;
}

.rp-chip {
  fill: var(--bg-tertiary);
  stroke: var(--accent);
  stroke-width: 2;
  rx: 12;
  transition: stroke 0.4s ease;
}
.rp-chip-label {
  fill: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 800;
  text-anchor: middle;
}
.rp-chip-sub {
  fill: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 12px;
  text-anchor: middle;
}

.rp-core {
  fill: var(--bg-card);
  stroke: var(--border);
  stroke-width: 1.5;
  rx: 6;
  transition: stroke 0.4s ease, fill 0.4s ease;
}
.rp-core-label {
  fill: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  text-anchor: middle;
}
.rp-core-sub {
  fill: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  text-anchor: middle;
}

/* Architecture-specific colours */
.rp-svg.arch-arm .rp-chip { stroke: var(--accent); }
.rp-svg.arch-arm .rp-core { stroke: var(--accent); }
.rp-svg.arch-arm .rp-arch-badge { fill: var(--accent); }
.rp-svg.arch-riscv .rp-chip { stroke: var(--accent-purple); }
.rp-svg.arch-riscv .rp-core { stroke: var(--accent-purple); }
.rp-svg.arch-riscv .rp-arch-badge { fill: var(--accent-purple); }

.rp-arch-badge {
  rx: 4;
  transition: fill 0.4s ease;
}
.rp-arch-badge-label {
  fill: #fff;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
  text-anchor: middle;
}

.rp-info {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.rp-info-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
}
.rp-info-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 6px;
  font-weight: 700;
}
.rp-info-value {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-primary);
}
.rp-info-value code {
  font-size: 12px;
}

.rp-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 12px;
  font-style: italic;
}

/* ===== RP2350 details bullets ===== */
.rp-bullets {
  list-style: none;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.rp-bullets li {
  padding: 4px 0;
  position: relative;
  padding-left: 20px;
}
.rp-bullets li::before {
  content: "▸";
  position: absolute;
  left: 0;
  top: 4px;
  color: var(--accent);
}
.rp-bullets strong {
  color: var(--text-primary);
}

/* ===== ipconfig side-by-side ===== */
.ip-side-by-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.ip-pane {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.ip-pane:nth-child(2) {
  border-color: var(--accent-green);
}
.ip-pane-label {
  padding: 10px 14px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 700;
}
.ip-pane-label strong {
  color: var(--accent-green);
}
.ip-pre {
  padding: 14px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-primary);
}

/* ===== MCU spec cards (matches v1.26/v1.27 pattern) ===== */
.mcu-spec-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
}
.mcu-spec-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  transition: all 0.2s ease;
}
.mcu-spec-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}
.mcu-spec-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.mcu-spec-header h3 {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.3px;
}
.mcu-spec-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  background: var(--bg-tertiary);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 16px;
  text-align: center;
}
.mcu-spec-strip > div {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.mcu-spec-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 2px;
}
.mcu-spec-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
}
.mcu-spec-boards {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

/* ===== Language Picker (matches the v1.25-v1.27 pattern) ===== */
.example-picker-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.example-picker-row label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  font-weight: 700;
}
.example-picker {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  cursor: pointer;
  flex: 1;
  max-width: 360px;
}
.example-picker:focus {
  outline: none;
  border-color: var(--accent);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .ip-side-by-side { grid-template-columns: 1fr; }
  .rp-info { grid-template-columns: 1fr; }
}