:root {
  --ink: #12333b;
  --sea: #0b7285;
  --deep-sea: #084c61;
  --sun: #f4a261;
  --leaf: #2a9d8f;
  --sand: #f6f3ed;
  --mist: #e9f0ef;
  --white: #ffffff;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

body {
  color: var(--ink);
  line-height: 1.6;
  background: linear-gradient(180deg, var(--sand) 0%, #ffffff 45%, var(--mist) 100%);
}

.container {
  width: 90%;
  max-width: 1100px;
  margin: auto;
}

.navbar {
  background: linear-gradient(90deg, var(--deep-sea), var(--sea));
  box-shadow: 0 6px 18px rgba(8, 76, 97, 0.25);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: var(--white);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.3px;
  cursor: pointer;
}

.logo {
  font-weight: bold;
  font-size: 20px;
  color: var(--white);
}

nav {
  display: flex;
  align-items: center;
}

nav a {
  margin-left: 20px;
  text-decoration: none;
  color: var(--white);
  font-family: "Segoe UI Variable", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 18px;
  font-weight: 600;
}

nav a.active {
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

.hero {
  position: relative;
  background: linear-gradient(120deg, rgba(8, 76, 97, 0.75), rgba(42, 157, 143, 0.55)), url('https://via.placeholder.com/1600x800') center/cover no-repeat;
  height: 80vh;
  display: flex;
  align-items: center;
  color: var(--white);
  text-align: center;
}

.hero-overlay {
  position: absolute;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(0,0,0,0.15), rgba(0,0,0,0.45));
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: 36px;
  margin-bottom: 15px;
}

.section {
  padding: 60px 0;
}

.light-bg {
  background: var(--mist);
}

.grid-3 {
  display: grid;
  gap: 30px;
}

.card img {
  width: 100%;
  border-radius: 8px;
  margin-bottom: 15px;
}

.card {
  background: var(--white);
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 10px 28px rgba(8, 76, 97, 0.12);
}

.feature h3 {
  margin-bottom: 10px;
}

.btn-primary {
  display: inline-block;
  padding: 12px 25px;
  background: var(--leaf);
  color: var(--white);
  text-decoration: none;
  border-radius: 6px;
  margin-top: 20px;
}

.btn-secondary {
  display: inline-block;
  padding: 10px 20px;
  background: var(--sun);
  color: #2b1e12;
  text-decoration: none;
  border-radius: 6px;
  margin-top: 15px;
}

.center {
  text-align: center;
}

footer {
  background: linear-gradient(90deg, var(--deep-sea), var(--sea));
  color: var(--white);
  padding: 30px 0;
  text-align: center;
}

.whatsapp-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--leaf);
  color: var(--white);
  padding: 15px;
  border-radius: 50%;
  text-decoration: none;
  font-size: 20px;
}

@media(min-width:768px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero h1 {
    font-size: 48px;
  }
}

@media(max-width:900px) {
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
  }

  nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: linear-gradient(90deg, var(--deep-sea), var(--sea));
    flex-direction: column;
    padding: 12px 0 18px;
    display: none;
  }

  nav a {
    margin: 8px 0;
    font-size: 17px;
  }

  body.menu-open nav {
    display: flex;
  }
}