:root {
  --bg-primary: #ffffff;
  --bg-subtle: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #fbfcfe;

  --border-light: #e2e8f0;
  --border-subtle: #edf2f7;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --accent-primary: #0f172a;
  --accent-blue: #2563eb;
  --accent-blue-light: #eff6ff;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
  --shadow-hover: 0 10px 30px -4px rgba(15, 23, 42, 0.08);

  --transition: all 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.brand-icon {
  display: block;
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
}

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

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: var(--transition);
}

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

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  font-family: var(--font-sans);
}

.btn-primary {
  background-color: var(--text-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #1e293b;
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--border-light);
  color: var(--text-primary);
}

.btn-outline:hover {
  background-color: var(--bg-subtle);
  border-color: #cbd5e1;
}

/* Hero */
.hero {
  padding: 60px 0 48px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 680px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* Feature grid / Services */
.section {
  padding: 60px 0;
}

.section-divider {
  height: 1px;
  background-color: var(--border-subtle);
  width: 100%;
}

.section-header {
  margin-bottom: 40px;
}

.section-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-blue);
  margin-bottom: 8px;
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.card:hover {
  border-color: #cbd5e1;
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.card-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Approach List */
.approach-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.approach-item {
  border-left: 2px solid var(--border-light);
  padding-left: 18px;
  transition: var(--transition);
}

.approach-item:hover {
  border-left-color: var(--accent-blue);
}

.approach-item h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.approach-item p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Contact box */
.contact-box {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 44px 36px;
  text-align: center;
}

.contact-box h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.contact-box p {
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 28px;
  font-size: 1.02rem;
}

.contact-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.email-btn {
  background: #ffffff;
  border: 1px solid var(--border-light);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: var(--transition);
}

.email-btn:hover {
  border-color: #cbd5e1;
  background-color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--text-primary);
  color: #ffffff;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  box-shadow: var(--shadow-md);
  transform: translateY(80px);
  opacity: 0;
  transition: var(--transition);
  z-index: 1000;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Footer */
footer {
  padding: 40px 0;
  margin-top: 40px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-brand {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.footer-meta {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Mobile */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: #ffffff;
    border-bottom: 1px solid var(--border-light);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    box-shadow: var(--shadow-md);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-toggle {
    display: block;
  }

  .hero {
    padding: 40px 0 36px;
  }

  .contact-box {
    padding: 32px 20px;
  }
}