/* GLOBAL VARIABLES */
:root {
  --light-color: #F8F9FB;
  --dark-color: #1A2741;
  --gray-color: #6B7280;
  --max-width: 1200px;
  --gap: 20px;
  --gap-sm: calc(var(--gap) / 2);
  --min-element-size: 44px;
  --icon-size: 34px;
  --min-font-size: 16px;
  --min-card-width: 280px;
  --header-height: 84px;
  --header-height-sm: calc(var(--min-element-size) + (var(--gap-sm) * 2));
}

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

/* BASE TYPOGRAPHY */
body {
  font: var(--min-font-size) sans-serif;
  overflow-x: hidden;
  min-height: 100vh;
  flex-direction: column;
}

h1 {
  margin: 0;
}

h2 {
  margin-bottom: var(--gap);
}

h3 {
  margin-bottom: var(--gap-sm);
}

a {
  text-decoration: none;
}

ul {
  list-style-position: inside;
}

/* LAYOUT */
main {
  margin-top: var(--header-height);
  line-height: 1.5;
  flex: 1;
}

footer {
  line-height: 1.5;
}

header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1;
}

header > div {
  align-content: center;
  justify-content: space-between;
}

header h1 {
  min-width: 203px;
}

header ul {
  list-style-type: none;
}

/* Dropdown */
.dropdown {
  position: relative;
}

.dropdown-toggle {
  /*background: none;*/
  border: none;
  cursor: pointer;
  gap: 5px;
  padding: 0;
  width: auto;
  height: auto;
  font-size: var(--min-font-size);
  font-family: inherit;
}

.dropdown-icon {
  width: 20px;
  height: 20px;
  fill: var(--light-color);
  transition: transform 0.3s;
}

.dropdown:hover .dropdown-icon, .dropdown-toggle[aria-expanded='true'] .dropdown-icon {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 220px;
  margin-top: var(--gap);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
  z-index: 10;
  list-style-type: none;
  gap: 0;
}

.dropdown:hover .dropdown-menu, .dropdown-toggle[aria-expanded='true'] + .dropdown-menu {
  opacity: 1;
  visibility: visible;
}

.dropdown-menu li {
  margin: 0;
  padding: var(--gap-sm);
  border-radius: 4px;
  transition: background-color 0.2s;
}

.dropdown-menu li:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.dropdown-menu a {
  display: block;
  white-space: nowrap;
}

#nav-left img {
  width: var(--min-element-size);
}

#nav-left a {
  height: var(--min-element-size);
}

#svg-hidden {
  display: none;
}

#menu-toggle {
  position: absolute;
  left: -9999px;
  border: none;
  fill: var(--light-color);
}

#hero {
  padding: 60px;
  background: linear-gradient(#2B4B8C, #5A7FC0);
}

#hero h2 {
  font-size: 2.5rem;
}

address {
  font-style: normal;
}

/* COMPONENTS */
button {
  width: var(--min-element-size);
  height: var(--min-element-size);
  background-color: transparent;
  outline: none;
}

#services-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(var(--min-card-width), 1fr));
  gap: var(--gap);
}

.carousel-container {
  position: relative;
  padding: 0 calc(var(--min-element-size) + var(--gap));
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: var(--min-element-size);
  height: var(--min-element-size);
  fill: var(--dark-color);
  color: var(--dark-color);
  background-color: transparent;
}

#carousel-prev {
  left: 0;
}

#carousel-next {
  right: 0;
}

.carousel-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

#testimonials-cards {
  gap: var(--gap);
  overflow: hidden;
}

/* UTILITIES */
.text-center {
  text-align: center;
}

.max-width {
  max-width: var(--max-width);
  margin: 0 auto;
}

.padding {
  padding: var(--gap);
}

.margin-auto {
  margin: auto;
}

.border-gray {
  border: 1px solid var(--gray-color);
}

.border-radius {
  border-radius: 6px;
}

.testimonial-logo {
  display: block;
  width: 34vw;
  max-width: 200px;
  margin: var(--gap) auto;
}

.flex {
  display: flex;
}

.gap {
  gap: var(--gap);
}

.mb-gap {
  margin-bottom: var(--gap);
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.dark {
  background-color: var(--dark-color);
}

.light {
  background-color: var(--light-color);
}

.color-light, a {
  color: var(--light-color);
}

.size-icon {
  width: var(--icon-size);
  height: var(--icon-size);
}

.flip-horizontal {
  transform: scaleX(-1);
}

/* MEDIA QUERIES */
@media (max-width: 680px) {
  #hero {
    padding: 40px var(--gap);
  }
  #hero h2 {
    font-size: 2rem;
  }
}

@media (max-width: 610px) {
  #menu-toggle {
    position: static;
  }
  header nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    background-color: var(--dark-color);
    transition: max-height 0.3s, visibility 0.3s;
    padding: var(--gap);
  }
  header nav.open {
    max-height: 500px;
    visibility: visible;
  }
  header nav ul {
    flex-direction: column;
    flex-wrap: wrap;
    justify-content: center;
    margin: auto;
  }
  /* Mobile dropdown adjustments */
  .dropdown {
    width: 100%;
    display: flex;
    flex-direction: column;
  }
  .dropdown-toggle {
    justify-content: center;
  }
  .dropdown-menu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    margin-top: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s;
  }
  
  .dropdown-toggle[aria-expanded='true'] + .dropdown-menu {
    max-height: 400px;
  }
}

@media (max-width: 490px) {
  #hero {
    padding: var(--gap);
  }
  #hero h2 {
    font-size: 1.5rem;
  }
}

@media (max-width: 450px) {
  header {
    height: var(--header-height-sm);
  }
  header.padding {
    padding: var(--gap-sm);
  }
  header nav, nav.open {
    top: var(--header-height-sm);
  }
  #nav-left {
    gap: var(--gap-sm);
  }
  h1 {
    font-size: calc(var(--min-font-size) * 1.3);
  }
  main {
    margin-top: var(--header-height-sm);
  }
}

@media (hover: hover) {
  button:hover {
    border-color: var(--dark-color);
  }
  button:not(:disabled):hover {
    cursor: pointer;
  }
  button:not(:disabled):active {
    background-color: var(--gray-color);
    border-color: var(--gray-color);
  }
}