/*──────────────────────────────────────────────
  VARIABLES & RESET
──────────────────────────────────────────────*/
:root {
  /* Colors */
  --clr-primary: #0056b3;
  --clr-secondary: #ffffff;
  --clr-dark: #333333;
  --clr-bg: #f9f9f9;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;

  /* Typography */
  --ff-base: 'Poppins', sans-serif;
  --fz-sm: clamp(0.9rem, 1.5vw, 1rem);
  --fz-md: clamp(1rem, 2vw, 1.125rem);
  --fz-lg: clamp(1.25rem, 3vw, 1.5rem);
  --fz-xl: clamp(2rem, 5vw, 3rem);

  /* Transition */
  --trans: 0.3s ease;
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--ff-base);
  background: var(--clr-bg);
  color: var(--clr-dark);
  line-height: 1.6;
}

/* Utility */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

/* Buttons */
.btn {
  display: inline-block;
  font-size: var(--fz-md);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--space-sm);
  font-weight: 600;
  transition: var(--trans);
  text-align: center;
}
.btn--primary {
  background: var(--clr-primary);
  color: var(--clr-secondary);
}
.btn--primary:hover,
.btn--primary:focus {
  background: #004494;
}
.btn--secondary {
  background: transparent;
  border: 2px solid var(--clr-secondary);
  color: var(--clr-secondary);
}
.btn--secondary:hover,
.btn--secondary:focus {
  background: rgba(255,255,255,0.8);
}

/*──────────────────────────────────────────────
  NAVBAR
──────────────────────────────────────────────*/
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: var(--clr-secondary);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  z-index: 1000;
}
.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
}
.brand {
  font-size: var(--fz-xl);
  font-weight: 700;
  color: var(--clr-primary);
}
.brand__text {
  font-size: var(--fz-sm);
  font-weight: 600;
  margin-left: var(--space-sm);
  color: var(--clr-dark);
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
}
.hamburger,
.hamburger::before,
.hamburger::after {
  content: '';
  display: block;
  width: 25px;
  height: 3px;
  background: var(--clr-dark);
  border-radius: 2px;
  transition: var(--trans);
}
.hamburger::before {
  transform: translateY(-8px);
}
.hamburger::after {
  transform: translateY(5px);
}
.nav-menu {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}
.nav-menu li a {
  font-size: var(--fz-md);
  text-transform: uppercase;
  color: var(--clr-dark);
  transition: var(--trans);
}
.nav-menu li a:hover,
.nav-menu li a:focus {
  color: var(--clr-primary);
}

/*──────────────────────────────────────────────
  HERO
──────────────────────────────────────────────*/
.hero {
  position: relative;
  min-height: 80vh;
  background: url('../images/hero.jpg') center/cover no-repeat;
  display: grid;
  place-items: center;
  text-align: center;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.4);
}
.hero__content {
  position: relative;
  color: var(--clr-secondary);
  padding: var(--space-xl) var(--space-md);
}
.hero__title {
  font-size: var(--fz-xl);
  margin-bottom: var(--space-md);
  line-height: 1.2;
}
.hero__subtitle {
  font-size: var(--fz-lg);
  margin-bottom: var(--space-lg);
}
.hero__buttons .btn {
  margin: 0 var(--space-xs);
}

/*──────────────────────────────────────────────
  FEATURES
──────────────────────────────────────────────*/
#features {
  margin: 6rem 0; /* extra space so it never overlaps */
}
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg);
}
.card {
  background: var(--clr-secondary);
  padding: var(--space-lg);
  text-align: center;
  border-radius: var(--space-sm);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: transform var(--trans), box-shadow var(--trans);
}
.card:hover,
.card:focus-within {
  transform: translateY(-5px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
.card__title {
  font-size: var(--fz-md);
  font-weight: 600;
}

/*──────────────────────────────────────────────
  ICONS (pure CSS)
──────────────────────────────────────────────*/
.icon {
  width: 60px;
  height: 60px;
  position: relative;
  margin: 0 auto var(--space-sm);
}

/* IMPORT */
.icon-import {
  border: 3px solid var(--clr-primary);
  border-radius: 8px;
}
.icon-import::before {
  content: '';
  position: absolute;
  width: 2px; height: 30px;
  background: var(--clr-primary);
  top: 10px; left: 50%; transform: translateX(-50%);
}
.icon-import::after {
  content: '';
  position: absolute;
  width: 12px; height: 12px;
  border-left: 2px solid var(--clr-primary);
  border-bottom: 2px solid var(--clr-primary);
  transform: translate(-50%, 0) rotate(-45deg);
  top: 38px; left: 50%;
}

/* EXPORT */
.icon-export {
  border: 3px solid var(--clr-primary);
  border-radius: 8px;
}
.icon-export::before {
  content: '';
  position: absolute;
  width: 2px; height: 30px;
  background: var(--clr-primary);
  bottom: 10px; left: 50%; transform: translateX(-50%);
}
.icon-export::after {
  content: '';
  position: absolute;
  width: 12px; height: 12px;
  border-right: 2px solid var(--clr-primary);
  border-top: 2px solid var(--clr-primary);
  transform: translate(-50%, 0) rotate(45deg);
  top: 10px; left: 50%;
}

/* CUSTOMS */
.icon-customs {
  width: 50px; height: 60px;
  background: var(--clr-secondary);
  border: 3px solid var(--clr-primary);
  border-radius: 4px;
}
.icon-customs::before {
  content: '';
  position: absolute;
  top: -3px; right: -3px;
  width: 20px; height: 20px;
  background: var(--clr-bg);
  border-top: 3px solid var(--clr-primary);
  border-right: 3px solid var(--clr-primary);
}
.icon-customs::after {
  content: '';
  position: absolute;
  top: 20px; left: 5px;
  width: calc(100% - 10px); height: 2px;
  background: var(--clr-primary);
  opacity: 0.5;
}

/* LOGISTICS */
.icon-logistics {
  width: 60px; height: 40px;
  position: relative;
}
.icon-logistics::before {
  content: '';
  position: absolute;
  bottom: 10px; left: 5px;
  width: 40px; height: 20px;
  background: var(--clr-primary);
  border-radius: 3px;
}
.icon-logistics .wheel {
  width: 12px; height: 12px;
  border: 3px solid var(--clr-primary);
  background: var(--clr-secondary);
  border-radius: 50%;
  position: absolute; bottom: 0;
}
.icon-logistics .wheel:nth-child(1) { left: 10px; }
.icon-logistics .wheel:nth-child(2) { right: 10px; }

/*──────────────────────────────────────────────
  ABOUT
──────────────────────────────────────────────*/
#about {
  margin: 6rem 0; /* extra space so it never overlaps */
}
.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}
.about__img img {
  width: 100%;
  border-radius: var(--space-sm);
  aspect-ratio: 4/3;
  object-fit: cover;
}

/*──────────────────────────────────────────────
  SERVICES GRID
──────────────────────────────────────────────*/
#services {
  margin: 6rem 0;
}
.services__heading {
  text-align: center;
  font-size: var(--fz-xl);
  margin-bottom: var(--space-lg);
}
.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-md);
}
.service-card {
  background: var(--clr-secondary);
  border-radius: var(--space-sm);
  padding: var(--space-lg);
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: transform var(--trans), box-shadow var(--trans);
  cursor: pointer;
}
.service-card:hover,
.service-card:focus-within {
  transform: translateY(-5px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
.service-card__title {
  font-size: var(--fz-md);
  font-weight: 600;
}

/*──────────────────────────────────────────────
  FOOTER
──────────────────────────────────────────────*/
.footer {
  background: var(--clr-primary);
  color: var(--clr-secondary);
  padding: var(--space-xl) 0;
  text-align: center;
}

/*──────────────────────────────────────────────
  RESPONSIVE
──────────────────────────────────────────────*/
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  .nav-menu {
    position: absolute;
    top: 100%; left: 0; width: 100%;
    background: var(--clr-secondary);
    overflow: hidden; max-height: 0;
    flex-direction: column;
    transition: max-height var(--trans);
  }
  .nav-menu.open {
    max-height: 300px;
  }
  .nav-menu li {
    padding: var(--space-md);
    text-align: center;
  }
  .features,
  .services__grid {
    grid-template-columns: 1fr;
  }
  .about {
    grid-template-columns: 1fr;
  }
}