/* ===== HERO ===== */
.page-hero--bottleneck {
  background: linear-gradient(135deg, rgba(0,0,0,0.72) 0%, rgba(0,30,40,0.65) 100%),
              url('../images/Herobg.png') center/cover no-repeat;
}

/* ===== TOOL SECTION ===== */
.bottleneck-tool {
  padding: 80px 6% 64px;
  max-width: 960px;
  margin: 0 auto;
}

.btool-header {
  text-align: center;
  margin-bottom: 40px;
}

.btool-header .section-desc {
  max-width: 560px;
  margin: 0 auto;
}

/* ===== CARD ===== */
.btool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* ===== SELECTORS ROW ===== */
.btool-selectors {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: end;
}

.btool-selector-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btool-selector-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
}

.btool-selector-label svg {
  color: var(--cyan);
  flex-shrink: 0;
}

.btool-select {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.92rem;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2300C8E8' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
}

.btool-select:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 200, 232, 0.12);
}

.btool-select.invalid {
  border-color: #FF6B6B;
}

/* ===== VS DIVIDER ===== */
.btool-vs-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-bottom: 4px;
}

.btool-vs-divider span {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  color: var(--cyan);
  background: rgba(0, 200, 232, 0.08);
  border: 1.5px solid rgba(0, 200, 232, 0.25);
  border-radius: 50%;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.03em;
}

/* ===== SETTINGS ===== */
.btool-settings {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.btool-setting-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btool-setting-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ===== PILLS ===== */
.btool-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border: 1.5px solid var(--border);
  border-radius: 100px;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.pill:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.pill.active {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #000;
  font-weight: 600;
}

.pill svg {
  flex-shrink: 0;
}

/* ===== ERROR ===== */
.btool-error {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(255, 107, 107, 0.08);
  border: 1px solid rgba(255, 107, 107, 0.3);
  border-radius: var(--radius-md);
  color: #FF6B6B;
  font-size: 0.9rem;
}

/* ===== CALCULATE BUTTON ===== */
.btool-btn {
  align-self: flex-start;
  padding: 14px 32px;
  font-size: 0.95rem;
}

/* ===== RESULTS ===== */
.btool-results {
  display: none;
  flex-direction: column;
  gap: 20px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
  animation: fadeUp 0.4s ease forwards;
}

.btool-results.visible {
  display: flex;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Result top row */
.btool-result-top {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btool-result-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
}

.btool-result-badge--balanced {
  background: rgba(34, 197, 94, 0.12);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.btool-result-badge--low {
  background: rgba(251, 191, 36, 0.12);
  color: #fbbf24;
  border: 1px solid rgba(251, 191, 36, 0.3);
}

.btool-result-badge--medium {
  background: rgba(249, 115, 22, 0.12);
  color: #f97316;
  border: 1px solid rgba(249, 115, 22, 0.3);
}

.btool-result-badge--high {
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btool-result-pct {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.2rem;
  color: var(--text);
  line-height: 1;
}

/* Bars */
.btool-bars {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btool-bar-row {
  display: grid;
  grid-template-columns: 140px 1fr 80px;
  align-items: center;
  gap: 12px;
}

.btool-bar-name {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btool-bar-track {
  height: 10px;
  background: var(--bg-soft);
  border-radius: 100px;
  overflow: hidden;
}

.btool-bar-fill {
  height: 100%;
  border-radius: 100px;
  width: 0%;
  transition: width 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.btool-bar--cpu {
  background: linear-gradient(90deg, #00C8E8, #0099bb);
}

.btool-bar--gpu {
  background: linear-gradient(90deg, #a855f7, #7c3aed);
}

.btool-bar-tag {
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-display);
  color: var(--text-muted);
  text-align: right;
}

.btool-bar-tag--bottleneck {
  color: #ef4444;
}

/* Result text */
.btool-result-text {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text);
  margin: 0;
}

/* Tip box */
.btool-result-tip {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 18px;
  background: rgba(0, 200, 232, 0.06);
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.btool-result-tip:empty {
  display: none;
}

/* Disclaimer */
.btool-disclaimer {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin: 0;
  font-style: italic;
}

/* ===== FAQ SECTION ===== */
.btool-faq {
  padding: 72px 6%;
  background: var(--bg-soft);
}

.btool-faq-header {
  text-align: center;
  margin-bottom: 48px;
}

.btool-faq-header .section-desc {
  max-width: 560px;
  margin: 0 auto;
}

.btool-faq-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}

.btool-faq-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btool-faq-icon {
  width: 52px;
  height: 52px;
  background: rgba(0, 200, 232, 0.08);
  border: 1px solid rgba(0, 200, 232, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
}

.btool-faq-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  margin: 0;
}

.btool-faq-card p {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--text-muted);
  margin: 0;
}

/* ===== CTA ===== */
.bottleneck-cta {
  padding: 80px 6%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  background: var(--bg);
}

.bottleneck-cta .section-title {
  max-width: 520px;
}

.bottleneck-cta p {
  max-width: 480px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

.bottleneck-cta__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 8px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .btool-card {
    padding: 24px 20px;
  }

  .btool-selectors {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .btool-vs-divider {
    justify-content: flex-start;
  }

  .btool-settings {
    gap: 20px;
  }

  .btool-bar-row {
    grid-template-columns: 120px 1fr 60px;
  }

  .btool-faq-grid {
    grid-template-columns: 1fr;
  }

  .btool-result-pct {
    font-size: 1.8rem;
  }
}

@media (max-width: 480px) {
  .bottleneck-tool {
    padding: 48px 4% 40px;
  }

  .btool-btn {
    width: 100%;
    justify-content: center;
  }
}