.ide-shell {
  background: var(--surface);
  border: 1px solid var(--hairline-strong);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.65);
}

.ide-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 12px 18px;
  background: #0b0c10;
  border-bottom: 1px solid var(--hairline);
}

.win-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.win-dots {
  display: inline-flex;
  gap: 7px;
}

.win-dots i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  display: inline-block;
  background: rgba(255, 255, 255, 0.14);
}

.file-tab {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text);
  padding: 4px 10px;
  background: var(--panel);
  border: 1px solid var(--hairline);
  border-radius: 5px;
}

.chapter-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: #0b0c10;
  border-bottom: 1px solid var(--hairline);
}

.chapter-btn {
  position: relative;
  padding: 11px 16px;
  border: 0;
  border-right: 1px solid var(--hairline);
  background: transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-align: left;
  cursor: pointer;
  transition: color 0.16s ease, background 0.16s ease;
}

.chapter-btn:last-child {
  border-right: 0;
}

.chapter-btn:hover,
.chapter-btn.active {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}

.ide-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  min-height: 306px;
}

.code-stage {
  position: relative;
  padding: 22px 24px;
  border-right: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 0.81rem;
  line-height: 1.72;
  color: #e2e8f0;
  overflow: hidden;
}

.code-line {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 14px;
  white-space: pre;
}

.ln {
  color: var(--dim);
  text-align: right;
  user-select: none;
}

.strike-bad {
  background: rgba(255, 107, 53, 0.08);
  border-left: 2px solid var(--orange);
  margin: 0 -24px;
  padding: 0 24px;
}

.strike-good {
  background: rgba(30, 136, 229, 0.09);
  border-left: 2px solid var(--accent);
  margin: 0 -24px;
  padding: 0 24px;
}

.playground-area {
  width: 100%;
  height: 250px;
  background: #0a0b0f;
  color: #e2e8f0;
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  resize: vertical;
  outline: none;
}

.playground-area:focus {
  border-color: var(--accent);
}

.telemetry {
  padding: 22px 24px;
  background: #0b0c10;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
}

.gauge-row {
  display: flex;
  align-items: center;
  gap: 18px;
}

.gauge-svg {
  width: 92px;
  height: 92px;
  flex-shrink: 0;
}

.score-title {
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1;
}

.verdict-pill {
  display: inline-block;
  margin-top: 7px;
  padding: 3px 9px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.03em;
}

.verdict-bad {
  background: rgba(255, 107, 53, 0.12);
  color: var(--orange);
  border: 1px solid rgba(255, 107, 53, 0.25);
}

.verdict-good {
  background: rgba(79, 156, 249, 0.12);
  color: var(--accent);
  border: 1px solid rgba(79, 156, 249, 0.28);
}

.mcp-card {
  padding: 12px 14px;
  border-radius: 8px;
  background: var(--panel);
  border: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.55;
  color: #cbd5e1;
}

.pg-studio {
  background: var(--surface);
  border: 1px solid var(--hairline-strong);
  border-radius: 12px;
  overflow: hidden;
}

.pg-toolbar {
  padding: 14px 22px;
  background: #0b0c10;
  border-bottom: 1px solid var(--hairline);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.pg-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr 0.9fr;
}

.pg-col {
  padding: 22px 24px;
  border-right: 1px solid var(--hairline);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
}

.pg-col:last-child {
  border-right: 0;
}

.pg-list {
  list-style: none;
  display: grid;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
}

.pg-list li {
  padding: 10px 12px;
  border-radius: 6px;
  background: var(--panel);
  border: 1px solid var(--hairline);
  border-left: 2px solid var(--orange);
  color: #e2e8f0;
}

.pg-list li span {
  color: var(--muted);
}

.pg-list li.pg-ok {
  border-left-color: var(--accent);
  color: var(--text);
}

.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
}

.bento-7 {
  grid-column: span 7;
}

.bento-5 {
  grid-column: span 5;
}

.bento-12 {
  grid-column: span 12;
}

.card-light {
  background: var(--light-card);
  border: 1px solid var(--light-line);
  border-radius: 12px;
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 22px;
}

.card-light h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: -0.025em;
  margin-top: 8px;
}

.card-light p {
  color: var(--ink-muted);
  font-size: 0.95rem;
}

.diagram-box {
  background: var(--light-band);
  border: 1px solid var(--light-line);
  border-radius: 8px;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.xray-card {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--hairline-strong);
  border-radius: 12px;
  overflow: hidden;
}

.xray-head {
  padding: 20px 26px;
  border-bottom: 1px solid var(--hairline);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
}

.mode-switch {
  display: inline-flex;
  padding: 3px;
  background: var(--bg);
  border: 1px solid var(--hairline);
  border-radius: 7px;
  gap: 3px;
}

.mode-btn {
  padding: 6px 12px;
  border-radius: 5px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  cursor: pointer;
}

.mode-btn.active {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--hairline-strong);
}

.xray-split {
  display: grid;
  grid-template-columns: 1fr 104px 1fr;
  align-items: center;
}

.xray-pane {
  padding: 22px 26px;
}

.xray-conduit {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
}

.xray-pre {
  margin-top: 12px;
  padding: 15px;
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 0.77rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre;
  color: #cbd5e1;
}

.calc-wrap {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 24px;
}

.slider-group {
  display: grid;
  gap: 20px;
}

.slider-row label {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 8px;
}

.slider-row input[type="range"] {
  width: 100%;
  accent-color: var(--blue);
}

.roi-panel {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--hairline-strong);
  border-radius: 12px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.roi-figure {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text);
  margin: 8px 0;
}

.bar-compare {
  margin-top: 18px;
  display: grid;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--muted);
}

.bar-track {
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
  margin-top: 5px;
}

.bar-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  align-items: stretch;
}

.tier {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 28px;
  height: 100%;
}

.tier-featured {
  background: var(--panel);
  border-color: rgba(79, 156, 249, 0.42);
  box-shadow: inset 0 1px 0 rgba(79, 156, 249, 0.35);
}

.tier-price {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  margin: 12px 0 4px;
}

.tier-list {
  list-style: none;
  margin-top: 20px;
  display: grid;
  gap: 10px;
  font-size: 0.89rem;
  color: #cbd5e1;
}

.tier-list li {
  padding-top: 10px;
  border-top: 1px solid var(--hairline);
}

.faq-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 54px;
}

.faq-card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 20px 24px;
}

.faq-card summary {
  font-weight: 600;
  cursor: pointer;
}

.faq-card p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.9rem;
}

.foot {
  border-top: 1px solid var(--hairline);
  padding: 30px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--muted);
}

@media (max-width: 920px) {
  .ide-grid,
  .pg-grid,
  .xray-split,
  .calc-wrap,
  .price-grid,
  .faq-cols,
  .chapter-strip {
    grid-template-columns: 1fr;
  }
  .bento-7,
  .bento-5 {
    grid-column: span 12;
  }
  .code-stage,
  .pg-col {
    border-right: 0;
    border-bottom: 1px solid var(--hairline);
  }
}