* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: Inter, Arial, sans-serif;
}

body {
  color: #111;
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

.container {
  max-width: 1100px;
  margin: auto;
  padding: 0 20px;
}

/* HEADER */
.header {
  background: #0b1c2d;
  color: #fff;
  padding: 15px 0;
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* LOGO */
.logo {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-main {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 1.2px;
}

.logo-sub {
  font-size: 11px;
  opacity: 0.7;
  letter-spacing: 0.8px;
}

nav a {
  margin-left: 20px;
  font-size: 14px;
}

/* HERO */
.hero {
  background: linear-gradient(135deg, #0b1c2d, #122f4a);
  color: #fff;
  padding: 80px 0;
  text-align: center;
}

.hero h1 {
  font-size: 40px;
  margin-bottom: 20px;
}

.hero p {
  max-width: 700px;
  margin: auto;
  margin-bottom: 30px;
  opacity: 0.9;
}

.actions {
  display: flex;
  justify-content: center;
  gap: 15px;
}

/* BUTTONS */
.btn {
  background: #1f8ef1;
  color: #fff;
  padding: 12px 24px;
  border-radius: 4px;
  font-size: 14px;
}

.btn.small {
  padding: 8px 16px;
}

.btn.outline {
  background: transparent;
  border: 1px solid #fff;
}

/* SECTIONS */
.section {
  padding: 70px 0;
}

.section.light {
  background: #f6f8fa;
}

.section.dark {
  background: #0b1c2d;
  color: #fff;
}

.section h2 {
  text-align: center;
  margin-bottom: 30px;
}

.center {
  text-align: center;
}

/* GRIDS */
.grid-3, .grid-4 {
  display: grid;
  gap: 20px;
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

/* CARDS */
.card {
  background: #fff;
  padding: 25px;
  border-radius: 6px;
  text-align: center;
  font-size: 16px;
}

/* FEATURES */
.features {
  max-width: 600px;
  margin: auto;
  list-style: none;
}

.features li {
  margin: 12px 0;
  padding-left: 20px;
  position: relative;
}

.features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #1f8ef1;
}

/* HOW IT WORKS */
.process {
  position: relative;
}

.process::before {
  content: "";
  position: absolute;
  top: 32px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: #dbe3ea;
  z-index: 0;
}

.step {
  position: relative;
  text-align: center;
  z-index: 1;
}

.step span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: #1f8ef1;
  color: #fff;
  border-radius: 50%;
  font-weight: 600;
  margin-bottom: 12px;
}

/* INSTALLER CTA spacing */
.installer-cta {
  margin-top: 40px;
}

/* MOBILE */
@media (max-width: 768px) {
  .process::before {
    display: none;
  }
}

/* CONTACT */
.contact-box {
  max-width: 400px;
  margin: 30px auto 0;
  text-align: center;
}

/* FOOTER */
.footer {
  background: #0b1c2d;
  color: #aaa;
  text-align: center;
  padding: 20px 0;
  font-size: 13px;
}

.footer .small {
  font-size: 11px;
  opacity: 0.7;
}