@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap');
@import url('techderm-tokens.css');

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body.site-body {
  font-family: var(--td-font);
  background: var(--td-surface);
  color: var(--td-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--td-primary);
  text-decoration: none;
}

a:hover {
  color: var(--td-primary-dark);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---- Nav ---- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--td-nav-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--td-border);
}

.site-nav-inner {
  max-width: var(--td-max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-logo {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--td-text);
  text-decoration: none;
}

.site-logo em {
  font-style: normal;
  color: var(--td-primary);
}

.site-nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.site-nav-links a {
  color: var(--td-text-soft);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.15s;
}

.site-nav-links a:hover {
  color: var(--td-primary);
}

.site-nav-links a.site-btn-primary,
.site-nav-links a.site-btn-primary:hover {
  color: #fff;
}

.site-nav-links a.site-btn-ghost,
.site-nav-links a.site-btn-ghost:hover {
  color: var(--td-text);
}

.site-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--td-text);
}

.site-nav-toggle svg {
  width: 24px;
  height: 24px;
}

/* ---- Buttons ---- */
.site-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--td-radius-sm);
  font-family: var(--td-font);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.1s;
}

.site-btn:active {
  transform: scale(0.98);
}

.site-btn-primary {
  background: var(--td-primary);
  color: #fff;
  border-color: var(--td-primary);
}

.site-btn-primary:hover {
  background: var(--td-primary-dark);
  border-color: var(--td-primary-dark);
  color: #fff;
}

.site-btn-secondary {
  background: transparent;
  color: var(--td-primary);
  border-color: var(--td-primary);
}

.site-btn-secondary:hover {
  background: var(--td-primary-light);
  color: var(--td-primary-dark);
}

.site-btn-ghost {
  background: transparent;
  color: var(--td-text-soft);
  border-color: var(--td-border);
}

.site-btn-ghost:hover {
  background: var(--td-bg);
  color: var(--td-text);
}

.site-btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

/* ---- Layout ---- */
.site-container {
  max-width: var(--td-max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.site-section {
  padding: 80px 0;
}

.site-section-alt {
  background: var(--td-bg);
}

.site-section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--td-primary);
  margin-bottom: 12px;
}

.site-section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.site-section-lead {
  font-size: 1.125rem;
  color: var(--td-text-soft);
  max-width: 640px;
  line-height: 1.7;
}

.site-section-header {
  margin-bottom: 48px;
}

.site-section-header.center {
  text-align: center;
}

.site-section-header.center .site-section-lead {
  margin-left: auto;
  margin-right: auto;
}

/* ---- Hero ---- */
.site-hero {
  padding: 80px 0 100px;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(27, 122, 74, 0.12), transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 80%, rgba(20, 90, 55, 0.08), transparent 55%),
    var(--td-surface);
}

.site-hero-inner {
  max-width: var(--td-max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.site-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--td-primary-light);
  color: var(--td-primary-dark);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.site-hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 20px;
}

.site-hero h1 span {
  color: var(--td-primary);
}

.site-hero-desc {
  font-size: 1.15rem;
  color: var(--td-text-soft);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 520px;
}

.site-hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.site-hero-visual {
  background: linear-gradient(135deg, var(--td-primary-darker), var(--td-primary));
  border-radius: var(--td-radius);
  padding: 32px;
  color: #fff;
  box-shadow: var(--td-shadow-lg);
}

.site-hero-flow {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.site-hero-flow-step {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--td-radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.site-hero-flow-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.site-hero-flow-text strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.site-hero-flow-text span {
  font-size: 0.8rem;
  opacity: 0.85;
}

/* ---- Cards ---- */
.site-cards {
  display: grid;
  gap: 24px;
}

.site-cards-3 {
  grid-template-columns: repeat(3, 1fr);
}

.site-cards-4 {
  grid-template-columns: repeat(4, 1fr);
}

.site-cards-6 {
  grid-template-columns: repeat(3, 1fr);
}

.site-card {
  background: var(--td-surface);
  border: 1px solid var(--td-border);
  border-radius: var(--td-radius);
  padding: 28px;
  transition: box-shadow 0.2s, border-color 0.2s;
}

.site-section-alt .site-card {
  background: var(--td-surface);
}

.site-card:hover {
  box-shadow: var(--td-shadow);
  border-color: rgba(27, 122, 74, 0.2);
}

.site-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--td-radius-sm);
  background: var(--td-primary-light);
  color: var(--td-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.site-card-icon svg {
  width: 22px;
  height: 22px;
}

.site-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.site-card p {
  font-size: 0.9rem;
  color: var(--td-text-soft);
  line-height: 1.6;
}

.site-card-problem {
  border-left: 3px solid #ef4444;
}

/* ---- Steps ---- */
.site-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.site-step {
  position: relative;
}

.site-step-num {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--td-primary-light);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 12px;
}

.site-step h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.site-step p {
  font-size: 0.875rem;
  color: var(--td-text-soft);
  line-height: 1.6;
  margin-bottom: 8px;
}

.site-step-result {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--td-primary);
  padding: 8px 12px;
  background: var(--td-primary-light);
  border-radius: var(--td-radius-sm);
  display: inline-block;
}

/* ---- Solution block ---- */
.site-solution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.site-solution-text p {
  color: var(--td-text-soft);
  margin-bottom: 16px;
  line-height: 1.7;
}

.site-solution-text p:last-child {
  margin-bottom: 0;
}

.site-solution-highlight {
  background: var(--td-primary-light);
  border-radius: var(--td-radius);
  padding: 32px;
  border: 1px solid rgba(27, 122, 74, 0.15);
}

.site-solution-highlight ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-solution-highlight li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
}

.site-solution-highlight li::before {
  content: "✓";
  color: var(--td-primary);
  font-weight: 700;
  flex-shrink: 0;
}

/* ---- CTA band ---- */
.site-cta-band {
  background: linear-gradient(135deg, var(--td-primary-darker), var(--td-primary));
  color: #fff;
  padding: 64px 0;
  text-align: center;
}

.site-cta-band h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.site-cta-band p {
  opacity: 0.9;
  margin-bottom: 28px;
  font-size: 1.05rem;
}

.site-cta-band .site-btn-primary {
  background: #fff;
  color: var(--td-primary-dark);
  border-color: #fff;
}

.site-cta-band .site-btn-primary:hover {
  background: var(--td-primary-light);
  color: var(--td-primary-darker);
}

.site-cta-band .site-btn-secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}

.site-cta-band .site-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.site-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

/* ---- Contact ---- */
.site-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.site-contact-card {
  background: var(--td-surface);
  border: 1px solid var(--td-border);
  border-radius: var(--td-radius);
  padding: 32px;
  box-shadow: var(--td-shadow);
}

.site-contact-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.site-contact-role {
  color: var(--td-text-soft);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.site-contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--td-bg);
  border-radius: var(--td-radius-sm);
  color: var(--td-text);
  text-decoration: none;
  font-weight: 500;
  transition: background 0.15s;
}

.site-contact-link:hover {
  background: var(--td-primary-light);
  color: var(--td-primary-dark);
}

.site-contact-link svg {
  width: 20px;
  height: 20px;
  color: var(--td-primary);
  flex-shrink: 0;
}

/* ---- Footer ---- */
.site-footer {
  background: var(--td-text);
  color: rgba(255, 255, 255, 0.7);
  padding: 48px 0 32px;
}

.site-footer-inner {
  max-width: var(--td-max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
}

.site-footer-brand .site-logo {
  color: #fff;
  margin-bottom: 12px;
  display: inline-block;
}

.site-footer-brand p {
  font-size: 0.875rem;
  line-height: 1.6;
  max-width: 320px;
}

.site-footer-col h4 {
  color: #fff;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.site-footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer-col a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
  text-decoration: none;
}

.site-footer-col a:hover {
  color: #fff;
}

.site-footer-bottom {
  max-width: var(--td-max-w);
  margin: 32px auto 0;
  padding: 24px 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
}

/* ---- FAQ ---- */
.site-faq {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-faq-item {
  background: var(--td-surface);
  border: 1px solid var(--td-border);
  border-radius: var(--td-radius);
  padding: 0 20px;
}

.site-faq-item summary {
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 1rem;
  color: var(--td-text);
  padding: 18px 0;
  position: relative;
  padding-right: 28px;
}

.site-faq-item summary::-webkit-details-marker {
  display: none;
}

.site-faq-item summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  color: var(--td-primary);
  font-weight: 400;
}

.site-faq-item[open] summary::after {
  content: '−';
}

.site-faq-item p {
  margin: 0 0 18px;
  color: var(--td-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.site-faq-ai-note {
  text-align: center;
  margin: 28px 0 0;
  font-size: 0.85rem;
  color: var(--td-muted);
}

.site-faq-ai-note a {
  color: var(--td-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ---- Animations ---- */
.site-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.site-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 960px) {
  .site-hero-inner,
  .site-solution-grid,
  .site-contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .site-cards-3,
  .site-cards-4,
  .site-cards-6 {
    grid-template-columns: 1fr 1fr;
  }

  .site-steps {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .site-section {
    padding: 56px 0;
  }

  .site-nav-links {
    display: none;
    position: absolute;
    top: var(--td-nav-h);
    left: 0;
    right: 0;
    background: var(--td-surface);
    border-bottom: 1px solid var(--td-border);
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 16px;
    box-shadow: var(--td-shadow);
  }

  .site-nav-links.open {
    display: flex;
  }

  .site-nav-toggle {
    display: block;
  }

  .site-cards-3,
  .site-cards-4,
  .site-cards-6,
  .site-steps {
    grid-template-columns: 1fr;
  }

  .site-footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .site-hero {
    padding: 48px 0 64px;
  }

  .site-hero-ctas {
    flex-direction: column;
  }

  .site-hero-ctas .site-btn {
    width: 100%;
  }
}