/* =====================
   CSS RESET + BASE
===================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Arial, sans-serif;
  line-height: 1.6;
  color: #1f2937;
  background-color: #ffffff;
}

/* =====================
   GLOBAL ELEMENTS
===================== */
a {
  text-decoration: none;
  color: inherit;
}

section {
  padding: 4rem 1.5rem;
}

h1, h2, h3 {
  line-height: 1.2;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1rem;
}

ul {
  list-style: none;
}

/* =====================
   HEADER / NAV
===================== */
header {
  position: sticky;
  top: 0;
  background: #0f172a;
  z-index: 100;
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

nav a {
  color: #e5e7eb;
  font-weight: 500;
}

nav a:hover {
  color: #38bdf8;
}

/* =====================
   HERO SECTION
===================== */
.hero {
  text-align: center;
  background: linear-gradient(135deg, #020617, #0f172a);
  color: #f9fafb;
  padding: 5rem 1.5rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
}

.hero p {
  max-width: 700px;
  margin: 1rem auto 2rem;
  color: #cbd5f5;
}

.hero .btn-primary,
.hero .btn-secondary {
  display: inline-block;
  margin: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 0.375rem;
  font-weight: 600;
}

.btn-primary {
  background: #38bdf8;
  color: #020617;
}

.btn-secondary {
  border: 1px solid #38bdf8;
  color: #38bdf8;
}

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-top: 3rem;
}

.stats div {
  background: rgba(255, 255, 255, 0.08);
  padding: 1rem;
  border-radius: 0.5rem;
  font-size: 0.95rem;
}

/* =====================
   FEATURES
===================== */
#features ul {
  max-width: 800px;
  margin: 2rem auto 0;
  display: grid;
  gap: 1rem;
}

#features li {
  background: #f1f5f9;
  padding: 1rem;
  border-radius: 0.5rem;
}

/* =====================
   PRICING
===================== */
.pricing-table {
  display: grid;
  gap: 2rem;
  max-width: 1100px;
  margin: 2rem auto 0;
}

.tier {
  border: 1px solid #e5e7eb;
  border-radius: 0.75rem;
  padding: 2rem;
  text-align: center;
  background: #ffffff;
}

.tier h3 {
  font-size: 1.4rem;
}

.tier p {
  font-size: 1.2rem;
  font-weight: 700;
  color: #0f172a;
}

.tier ul li {
  margin: 0.5rem 0;
}

/* =====================
   DEMO FORM
===================== */
#demo-form {
  max-width: 500px;
  margin: 2rem auto 0;
  display: grid;
  gap: 0.75rem;
}

#demo-form input,
#demo-form button {
  padding: 0.75rem;
  font-size: 1rem;
}

#demo-form button {
  background: #0f172a;
  color: #ffffff;
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
}

#demo-form button:hover {
  background: #020617;
}

/* =====================
   RESOURCES & CONTACT
===================== */
#resources,
#contact {
  text-align: center;
}

/* =====================
   FOOTER
===================== */
footer {
  text-align: center;
  padding: 1.5rem;
  background: #020617;
  color: #cbd5f5;
}

/* =====================
   MEDIA QUERIES
===================== */

/* Tablets */
@media (min-width: 768px) {
  nav {
    justify-content: space-between;
  }

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

/* Desktops */
@media (min-width: 1024px) {
  section {
    padding: 6rem 2rem;
  }

  .hero {
    padding: 7rem 2rem;
  }
}