/* =============================================
   PROBLEM SECTION
   ============================================= */

#problem {
  position: relative;
}

.problem-header {
  text-align: center;
  margin-bottom: 64px;
  max-width: 888px;
  margin-left: auto;
  margin-right: auto;
}

.problem-header p {
  margin-top: 16px;
}

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

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 36px 28px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.problem-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(239, 68, 68, 0.25);
  transform: translateY(-2px);
}

.problem-icon {
  font-size: 36px;
  margin-bottom: 20px;
  display: block;
}

.problem-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.problem-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* =============================================
   SECTION HEADER (shared)
   ============================================= */

.section-header {
  text-align: center;
  margin-bottom: 64px;
  max-width: 888px;
  margin-left: auto;
  margin-right: auto;
}

.section-header h2 {
  margin-bottom: 0;
}

.section-header p {
  margin-top: 16px;
}

/* =============================================
   SOLUTION / PRODUCT SECTION
   ============================================= */

#solution {
  position: relative;
}

.products-header {
  text-align: center;
  margin-bottom: 80px;
  max-width: 888px;
  margin-left: auto;
  margin-right: auto;
}

.products-header p {
  margin-top: 16px;
}

.product-block {
  margin-bottom: 80px;
  position: relative;
}

.product-block:last-child {
  margin-bottom: 0;
}

.product-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.product-rank {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.product-name {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800;
  margin-bottom: 8px;
}

.product-tagline {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.5;
}

/* Tabs */
.product-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  background: rgba(255,255,255,0.03);
  padding: 4px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
}

.tab-btn {
  flex: 1;
  padding: 9px 12px;
  background: transparent;
  border: none;
  border-radius: 7px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn.active {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.tab-btn:hover:not(.active) {
  color: var(--text-secondary);
}

/* Tab Panels */
.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.tab-panel p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

/* Feature list in Overview tab */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.feature-item::before {
  content: '→';
  color: var(--accent-violet);
  flex-shrink: 0;
  margin-top: 1px;
}

/* Competitor comparison */
.competitor-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.competitor-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px;
  background: rgba(255,255,255,0.02);
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
}

.competitor-name {
  font-weight: 600;
  font-size: 13px;
  color: var(--text-primary);
  min-width: 90px;
  flex-shrink: 0;
}

.competitor-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

.advantage-box {
  padding: 16px;
  background: rgba(74,222,128,0.04);
  border: 1px solid rgba(74,222,128,0.15);
  border-radius: 8px;
}

.advantage-box p {
  color: var(--accent-green) !important;
  font-size: 14px !important;
  margin: 0 !important;
  font-weight: 500;
}

/* Metrics Panel */
.product-panel {
  position: sticky;
  top: 100px;
}

.metrics-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 28px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}

.metrics-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--product-color, var(--accent-violet)), transparent);
}

.metrics-card-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.metric-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.metric-row:last-child {
  border-bottom: none;
}

.metric-row-label {
  font-size: 13px;
  color: var(--text-secondary);
}

.metric-row-value {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.metric-row-value.green  { color: var(--accent-green); }
.metric-row-value.cyan   { color: var(--accent-cyan); }
.metric-row-value.violet { color: var(--accent-violet); }

.product-cta-row {
  display: flex;
  gap: 12px;
}

/* Product color variants */
.product-askme { --product-color: #a78bfa; }

.product-askme .product-name { color: #a78bfa; }

/* =============================================
   HOW IT WORKS SECTION
   ============================================= */

#how-it-works {
  position: relative;
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: start;
  gap: 0;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 36px 28px;
  transition: var(--transition);
}

.step-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-3px);
}

.step-number {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--accent-violet);
  opacity: 0.45;
  margin-bottom: 16px;
  line-height: 1;
}

.step-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.step-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.step-connector {
  width: 48px;
  height: 1px;
  background: linear-gradient(90deg, var(--border-subtle), var(--accent-violet), var(--border-subtle));
  margin-top: 64px;
  flex-shrink: 0;
}

/* =============================================
   FEATURES SECTION
   ============================================= */

#features {
  position: relative;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-3px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* =============================================
   TRUST SECTION
   ============================================= */

#trust {
  position: relative;
}

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

.tech-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.tech-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-3px);
}

.tech-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
}

.tech-icon-violet {
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.tech-icon-cyan {
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.15);
}

.tech-icon-green {
  background: rgba(74, 222, 128, 0.08);
  border: 1px solid rgba(74, 222, 128, 0.15);
}

.tech-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.tech-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

/* =============================================
   USE CASES SECTION
   ============================================= */

#use-cases {
  position: relative;
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.use-case-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 32px 24px;
  transition: var(--transition);
}

.use-case-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

.use-case-icon {
  font-size: 32px;
  display: block;
  margin-bottom: 16px;
}

.use-case-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.use-case-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* =============================================
   PROOF SECTION
   ============================================= */

#proof {
  position: relative;
}

.traction-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.traction-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.traction-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--card-accent, var(--accent-violet)), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.traction-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-3px);
}

.traction-card:hover::before {
  opacity: 1;
}

.traction-card.accent-cyan  { --card-accent: var(--accent-cyan); }
.traction-card.accent-green { --card-accent: var(--accent-green); }

.traction-number {
  font-family: var(--font-display);
  font-size: clamp(36px, 4vw, 52px);
  font-weight: 800;
  line-height: 1;
  margin-bottom: 8px;
}

.traction-label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 8px;
}

.traction-sublabel {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* =============================================
   FAQ SECTION
   ============================================= */

#faq {
  position: relative;
}

.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.faq-item {
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-card);
  transition: border-color 0.2s ease;
}

.faq-item[open] {
  border-color: var(--border-glow);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 22px 28px;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: color 0.2s ease;
}

.faq-question::after {
  content: '+';
  font-size: 22px;
  font-weight: 300;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform 0.3s ease, color 0.2s ease;
  line-height: 1;
}

.faq-item[open] .faq-question::after {
  transform: rotate(45deg);
  color: var(--accent-violet);
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s ease;
}

.faq-answer > p {
  overflow: hidden;
  padding: 0 28px 22px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-item[open] .faq-answer {
  grid-template-rows: 1fr;
}

/* =============================================
   CTA SECTION
   ============================================= */

#cta {
  position: relative;
}

.cta-inner {
  text-align: center;
  max-width: 888px;
  margin: 0 auto;
}

.cta-inner h2 {
  margin: 12px 0 20px;
}

.cta-inner > p {
  margin-bottom: 40px;
}

.cta-actions {
  display: flex;
  align-items: center;
  gap: 22px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-social {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 0;
  color: var(--text-muted);
  font-size: 14px;
}

.cta-social span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-right: 2px;
}

.cta-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(34,211,238,0.24);
  border-radius: 10px;
  color: var(--text-primary);
  background: rgba(34,211,238,0.08);
  box-shadow: 0 0 24px rgba(34,211,238,0.08);
  text-decoration: none;
  transition: var(--transition);
}

.cta-social a:hover {
  color: var(--text-primary);
  border-color: rgba(34,211,238,0.5);
  background: rgba(34,211,238,0.14);
  box-shadow: 0 0 28px rgba(34,211,238,0.18);
  transform: translateY(-2px);
}

.cta-social-icon {
  display: block;
  width: 18px !important;
  height: 18px !important;
  flex: 0 0 18px;
}

/* =============================================
   FOOTER
   ============================================= */

footer {
  padding: 40px 0;
  border-top: 1px solid var(--border-subtle);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.footer-copy {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--text-secondary);
}

/* =============================================
   RESPONSIVE
   ============================================= */

@media (max-width: 1100px) {
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .step-connector {
    width: 1px;
    height: 32px;
    background: linear-gradient(180deg, var(--border-subtle), var(--accent-violet), var(--border-subtle));
    margin: 0 auto;
  }

  .use-cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .traction-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .product-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .product-panel {
    position: static;
  }

  .tech-grid,
  .features-grid {
    grid-template-columns: 1fr 1fr;
  }

  .problem-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .problem-grid,
  .tech-grid,
  .features-grid,
  .use-cases-grid {
    grid-template-columns: 1fr;
  }

  .traction-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 14px 20px;
  }

  .cta-actions {
    flex-direction: column;
    align-items: center;
  }

  .cta-social {
    gap: 10px 14px;
    margin-top: 2px;
  }

  .faq-question {
    font-size: 15px;
    padding: 18px 20px;
  }

  .faq-answer p {
    padding: 0 20px 18px;
  }
}

@media (max-width: 400px) {
  .traction-grid {
    grid-template-columns: 1fr;
  }
}