/* ── Feedback ─────────────────────────── */
#feedback {
  background:
    linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  max-width: none;
}

#feedback .section-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.feedback-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.feedback-card {
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(10px) saturate(150%);
  -webkit-backdrop-filter: blur(10px) saturate(150%);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  display: flex;
  gap: 16px;
  transition: background 250ms, border-color 250ms, transform 250ms var(--ease-spring);
}

.feedback-card:hover {
  background: rgba(255, 255, 255, 0.9);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.feedback-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
}

.feedback-icon.red { background: #fef2f2; }
.feedback-icon.yellow { background: #fefce8; }
.feedback-icon.blue { background: #eff6ff; }
.feedback-icon.gray { background: var(--surface2); }

.feedback-body {
  flex: 1;
}

.feedback-title {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.feedback-action {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.feedback-action strong {
  color: var(--accent);
  font-weight: 600;
}

/* ── Quickstart ─────────────────────────── */
.quickstart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 48px;
}

.quickstart-install {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 36px;
}

.quickstart-install h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.quickstart-install h3 > span:first-child {
  width: 22px;
  height: 22px;
  background: var(--accent);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.7rem;
  flex-shrink: 0;
}

.qs-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.qs-step {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 16px;
  align-items: start;
  padding: 12px;
  border-radius: 8px;
  transition: background 150ms;
}

.qs-step:hover {
  background: var(--bg);
}

.qs-num {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 800;
  color: var(--accent);
  text-align: center;
  padding-top: 2px;
}

.qs-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.qs-cmd {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
  word-break: break-all;
  line-height: 1.5;
}

.quickstart-run {
  background:
    linear-gradient(135deg, #1c1917 0%, #292524 100%);
  border-radius: 14px;
  padding: 36px;
  color: #fff;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.04) inset,
    0 16px 48px rgba(28, 25, 23, 0.16),
    0 2px 8px rgba(28, 25, 23, 0.08);
  position: relative;
  overflow: hidden;
}

.quickstart-run::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 60%;
  height: 80%;
  background: radial-gradient(circle, rgba(234, 88, 12, 0.18), transparent 65%);
  filter: blur(40px);
  pointer-events: none;
}

.quickstart-run h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}

.code-terminal {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  overflow: hidden;
}

.terminal-bar {
  background: rgba(255,255,255,0.06);
  padding: 8px 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.td-red { background: #ff5f56; }
.td-yellow { background: #ffbd2e; }
.td-green { background: #27c93f; }

.terminal-body {
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.8;
}

.terminal-prompt {
  color: rgba(255,255,255,0.4);
  margin-right: 8px;
  user-select: none;
}

.terminal-cmd {
  color: #fff;
}

.terminal-comment {
  color: #a8a8a8;
}

.terminal-divider {
  height: 1px;
  background: rgba(255,255,255,0.12);
  margin: 10px 0;
}

.terminal-accent {
  color: #fb923c;
}

/* ── Tech Stack ─────────────────────────── */
#stack {
  background: var(--bg);
  text-align: center;
}

#stack .section-desc {
  margin: 0 auto;
}

.stack-grid {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 16px;
  margin-top: 48px;
  flex-wrap: nowrap;
}

.stack-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 36px 28px;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(12px) saturate(150%);
  -webkit-backdrop-filter: blur(12px) saturate(150%);
  border: 1px solid var(--border);
  border-radius: 14px;
  flex: 1 1 0;
  min-width: 0;
  max-width: 200px;
  transition: border-color 250ms, transform 250ms var(--ease-spring), box-shadow 250ms;
}

.stack-item:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(194, 65, 12, 0.10);
}

.stack-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
  overflow: hidden;
}

.si-claude { background: #fff7ed; }
.si-pw { background: #f0fdf4; }
.si-browser { background: #fef3c7; }
.si-openspec { background: #eff6ff; }
.si-mcp { background: #f0fdf4; }

.stack-icon svg {
  width: 26px;
  height: 26px;
}

.stack-name {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text);
}

.stack-role {
  font-size: 0.75rem;
  color: var(--muted);
}

/* ── Comparison ─────────────────────────── */
#comparison {
  background:
    linear-gradient(180deg, var(--bg) 0%, var(--surface) 50%, var(--bg) 100%);
  border-top: 1px solid var(--border);
  max-width: none;
}

#comparison .section-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-width: 900px;
  margin: 48px auto 0;
  padding: 0 24px;
}

.comparison-card {
  border-radius: 14px;
  padding: 32px;
  border: 1px solid var(--border);
}

.comparison-card.better {
  background: var(--bg);
  border-color: var(--green);
  border-width: 2px;
}

.comparison-card.legacy {
  background: var(--bg);
}

.comparison-title {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 20px;
}

.comparison-card.better .comparison-title {
  color: var(--green);
}

.comparison-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border);
}

.comparison-item:last-child {
  border-bottom: none;
}

.check-icon {
  color: var(--green);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
  font-size: 0.85rem;
}

.legacy-item {
  color: var(--text-secondary);
  padding-left: 26px;
  position: relative;
}

.legacy-item::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--border-strong);
  font-weight: 300;
}

/* ── Responsive ─────────────────────────── */
@media (max-width: 1024px) {
  .workflow-layout {
    grid-template-columns: 1fr;
  }
  .workflow-sidebar {
    position: static;
  }
  .sidebar-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
  }
  .sidebar-card-title {
    grid-column: 1 / -1;
  }
}

@media (max-width: 1024px) {
  .workflow-prereq {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    padding: 120px 20px 60px;
    gap: 32px;
  }
  .hero-title {
    font-size: clamp(2rem, 8vw, 2.5rem);
  }
  .hero-visual {
    grid-column: 1;
    grid-row: auto;
  }
  .hero-card {
    width: 100%;
    margin-top: 16px;
  }
  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 0 20px;
  }
  .feature-card {
    padding: 28px 24px;
  }
  .feature-card:first-child { border-radius: 12px 12px 0 0; }
  .feature-card:nth-child(3) { border-radius: 0; }
  .feature-card:last-child { border-radius: 0 0 12px 12px; }
  .feature-card:first-child:last-child { border-radius: 12px; }
  .quickstart-grid {
    grid-template-columns: 1fr;
  }
  .quickstart-install {
    padding: 24px;
  }
  .quickstart-run {
    padding: 24px;
  }
  .comparison-grid {
    grid-template-columns: 1fr;
  }
  .feedback-grid {
    grid-template-columns: 1fr;
    padding: 0 20px;
  }
  .footer-inner {
    grid-template-columns: 1fr;
  }
  .nav-links .nav-link-text {
    display: none;
  }
  .nav-links a:not(.nav-cta) {
    padding: 6px;
  }
  .workflow-prereq {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  #feedback {
    padding: 0;
  }
  #features {
    padding: 48px 0;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 64px 20px;
  }
  .section-header {
    margin-bottom: 48px;
  }
  #features .section-header {
    padding: 0 20px;
  }
  #feedback .section-header {
    padding: 0 20px;
  }
  #claude-config .section-header {
    padding: 0 20px;
  }
  #comparison .section-header {
    padding: 0 20px;
  }
  #workflow .section-header {
    padding: 0 20px;
  }
  .section-title {
    font-size: clamp(1.75rem, 6vw, 2rem);
  }
  .stack-grid {
    gap: 8px;
  }
  .stack-item {
    padding: 20px 12px;
    max-width: none;
  }
  #features {
    padding: 48px 0;
  }
  /* Nav: hide logo text on very small screens */
  .nav-logo-text {
    display: none;
  }
  .nav-inner {
    padding: 0 16px;
  }
  /* Prereq cards: readable font on mobile */
  .prereq-card {
    padding: 16px;
  }
  .prereq-cmd {
    font-size: 0.68rem;
    line-height: 1.6;
  }
  /* Workflow: reduce step font and badge size on mobile */
  .step-name {
    font-size: 0.9rem;
  }
  .step-desc {
    font-size: 0.82rem;
  }
  .step-tag {
    font-size: 0.65rem;
    padding: 2px 6px;
  }
  .step-badge {
    font-size: 0.6rem;
  }
  /* Sidebar on mobile */
  .sidebar-card {
    padding: 20px;
  }
  .sidebar-stat {
    padding: 12px 0;
  }
  .sidebar-stat-label {
    font-size: 0.82rem;
  }
  .sidebar-stat-value {
    font-size: 0.85rem;
  }
  .workflow-layout {
    gap: 40px;
  }
  .comparison-card {
    padding: 24px;
  }
  .feedback-card {
    padding: 20px;
  }
}