/* ===========================
   Base & Reset
   =========================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: #1a1a2e;
  background-color: #ffffff;
  line-height: 1.6;
  font-size: 16px;
}

/* ===========================
   Typography
   =========================== */
h1, h2, h3 {
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

p {
  color: #4a5568;
}

/* ===========================
   Navigation
   =========================== */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: #C2F6FE;
  border-bottom: 1px solid #e8ecf0;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: #1e40af;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: #374151;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: #1e40af;
}

/* ===========================
   Buttons
   =========================== */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background-color: #1e40af;
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #1d3a9e;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(30, 64, 175, 0.3);
}

.btn-outline {
  background-color: transparent;
  color: #1e40af;
  border: 2px solid #1e40af;
}

.btn-outline:hover {
  background-color: #1e40af;
  color: #ffffff;
  transform: translateY(-1px);
}

/* ===========================
   Hero Section
   =========================== */
.hero {
  padding: 7rem 2rem 6rem;
  text-align: center;
  background: linear-gradient(160deg, #f0f4ff 0%, #ffffff 60%);
}

.hero-inner {
  max-width: 700px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  background-color: #eff6ff;
  color: #1e40af;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  border: 1px solid #bfdbfe;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 3.8rem);
  color: #111827;
  margin-bottom: 1.25rem;
}

.hero h1 span {
  color: #1e40af;
}

.hero-tagline {
  font-size: 1.2rem;
  color: #6b7280;
  margin-bottom: 2.5rem;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* ===========================
   About Section
   =========================== */
.about {
  padding: 5rem 2rem;
  background-color: #ffffff;
}

.about-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #1e40af;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  color: #111827;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.05rem;
  color: #6b7280;
  max-width: 520px;
  margin-bottom: 3rem;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background-color: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 2rem;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.card:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.07);
  transform: translateY(-2px);
}

.card-icon {
  width: 42px;
  height: 42px;
  background-color: #eff6ff;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.card-icon svg {
  width: 22px;
  height: 22px;
  stroke: #1e40af;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.card h3 {
  font-size: 1.05rem;
  color: #111827;
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.95rem;
  color: #6b7280;
  line-height: 1.65;
}

/* ===========================
   CTA Strip
   =========================== */
.cta-strip {
  padding: 5rem 2rem;
  background: linear-gradient(135deg, #1e40af 0%, #1d4ed8 100%);
  text-align: center;
}

.cta-strip h2 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  color: #ffffff;
  margin-bottom: 0.75rem;
}

.cta-strip p {
  color: #bfdbfe;
  margin-bottom: 2rem;
  font-size: 1.05rem;
}

.btn-white {
  background-color: #ffffff;
  color: #1e40af;
  font-weight: 700;
}

.btn-white:hover {
  background-color: #eff6ff;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* ===========================
   Sign Up Page
   =========================== */
.signup-hero {
  padding: 6rem 2rem 4rem;
  text-align: center;
  background: linear-gradient(160deg, #f0f4ff 0%, #ffffff 70%);
}

.signup-hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  color: #111827;
  margin-bottom: 1rem;
}

.signup-hero p {
  font-size: 1.1rem;
  color: #6b7280;
  max-width: 480px;
  margin: 0 auto;
}

.form-section {
  padding: 3rem 2rem 6rem;
  max-width: 720px;
  margin: 0 auto;
}

.form-container {
  background-color: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 3rem 2rem;
  text-align: center;
}

.form-placeholder {
  padding: 3rem 1rem;
  border: 2px dashed #bfdbfe;
  border-radius: 10px;
  background-color: #eff6ff;
  color: #1e40af;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.form-placeholder small {
  display: block;
  font-weight: 400;
  color: #6b7280;
  margin-top: 0.5rem;
  font-size: 0.85rem;
}

/* ===========================
   Footer
   =========================== */
footer {
  background-color: #111827;
  padding: 3rem 2rem;
  text-align: center;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.footer-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.5rem;
}

.footer-sub {
  font-size: 0.9rem;
  color: #9ca3af;
  margin-bottom: 1.5rem;
}

.footer-contact {
  font-size: 0.85rem;
  color: #6b7280;
}

.footer-contact a {
  color: #93c5fd;
  text-decoration: none;
}

.footer-contact a:hover {
  color: #bfdbfe;
}

.footer-divider {
  border: none;
  border-top: 1px solid #1f2937;
  margin: 1.5rem 0;
}

.footer-copy {
  font-size: 0.8rem;
  color: #4b5563;
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 640px) {
  .nav-inner {
    padding: 0 1.25rem;
  }

  .nav-links {
    gap: 1.25rem;
  }

  .hero {
    padding: 5rem 1.25rem 4rem;
  }

  .about {
    padding: 3.5rem 1.25rem;
  }

  .cta-strip {
    padding: 3.5rem 1.25rem;
  }

  .signup-hero {
    padding: 4rem 1.25rem 2.5rem;
  }

  .form-section {
    padding: 2rem 1.25rem 4rem;
  }

  .form-container {
    padding: 2rem 1.25rem;
  }

  footer {
    padding: 2.5rem 1.25rem;
  }
}