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

:root {
  --primary: #5DAECF;
  --dark: #0F3B52;
  --accent: #083042;
  --white: #ffffff;
  --glass: rgba(255,255,255,0.08);
  --border-glass: rgba(255,255,255,0.15);
  --max-width: 1300px;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--dark);
  color: var(--white);
  line-height: 1.6;
}

html {
  scroll-behavior: smooth;
}

.container {
  width: 90%;
  max-width: var(--max-width);
  margin: auto;
}

/* =============================
   LINKS
============================= */
a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: #ffffff;
  text-decoration: underline;
}

a:visited {
  color: var(--primary);
}

/* =============================
   NAVBAR
============================= */
header {
  position: fixed;
  width: 100%;
  backdrop-filter: blur(15px);
  background: rgba(15,59,82,0.85);
  border-bottom: 1px solid var(--border-glass);
  z-index: 999;
}

.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
}

nav ul {
  display: flex;
  gap: 40px;
  list-style: none;
}

nav a {
  color: var(--white);
  font-weight: 500;
}

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

.menu-toggle {
  display: none;
  font-size: 28px;
  cursor: pointer;
}

/* Mobile menu */
@media (max-width: 768px) {
  nav ul {
    display: none;
    flex-direction: column;
    background: var(--accent);
    position: absolute;
    top: 60px;
    right: 20px;
    padding: 20px;
    border-radius: 10px;
  }
  nav ul.active {
    display: flex;
  }
  .menu-toggle {
    display: block;
  }
}

/* =============================
   HERO
============================= */
.hero {
  min-height: 100vh;
  background: linear-gradient(rgba(15,59,82,0.85), rgba(15,59,82,0.9)),
              url("../images/cover.jpg") center/cover no-repeat;
  display: flex;
  align-items: center;
  text-align: center;
  padding-top: 120px;
}

.hero-content {
  max-width: 800px;
  margin: auto;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 800;
  margin-bottom: 20px;
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.3rem);
  margin-bottom: 30px;
  opacity: 0.9;
}

/* =============================
   BUTTON
============================= */
.btn-primary {
  background: var(--primary);
  color: var(--dark);
  padding: 14px 35px;
  border-radius: 40px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: 0.3s ease;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(93,174,207,0.4);
}

/* =============================
   SECTIONS
============================= */
.section {
  padding: 120px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  margin-bottom: 10px;
}

/* =============================
   ABOUT
============================= */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 50px;
}

/* =============================
   SERVICES
============================= */
.services {
  background: var(--accent);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 35px;
}

.service-card {
  background: var(--glass);
  border: 1px solid var(--border-glass);
  padding: 40px 30px;
  border-radius: 20px;
  transition: 0.4s ease;
}

.service-card:hover {
  transform: translateY(-10px);
  background: rgba(255,255,255,0.12);
}

/* =============================
   CONTACT
============================= */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 50px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px;
  margin-bottom: 20px;
  border-radius: 10px;
  border: none;
  font-family: inherit;
  background: var(--white);
  color: var(--dark);
}

/* =============================
   WHATSAPP BUTTON
============================= */
.whatsapp-btn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: #25D366;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 6px rgba(0,0,0,0.2);
  z-index: 999;
}
.whatsapp-btn img {
  width: 35px;
  height: 35px;
}

/* Show only on mobile */
@media (min-width: 768px) {
  .whatsapp-btn {
    display: none;
  }
}