body {
  font-family: 'Lato', sans-serif;
  margin: 0;
  padding: 0;
}

header {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 1200px;
  background-color: black;
  color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  height: 5vh;
  border-radius: 15px;
  box-shadow: 0px 4px 10px rgba(255, 255, 255, 0.3);
  font-family: Arial, sans-serif;
  z-index: 1000;
}

header .logo {
  font-size: 130%;
  font-weight: bold;
}

header nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
}

header nav ul li {
  cursor: pointer;
  font-size: 100%;
  position: relative;
}

header .header-buttons {
  display: flex;
  gap: 10px;
}

header .header-buttons button {
  padding: 5px 10px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 100%;
}

header .header-buttons button:hover {
  opacity: 0.8;
}

.button-link {
  text-decoration: none;
  display: inline-block;
}

.header-buttons .button-link button {
  padding: 5px 10px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 100%;
  background-color: #ffffff;
  color: rgb(0, 0, 0);
}

.header-buttons .button-link button:hover {
  opacity: 0.8;
}

.nav-link {
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.nav-link:hover {
  color: #c3c3c3;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background-color: white;
  border: 1px solid #ddd;
  border-radius: 5px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  padding: 10px 0;
  z-index: 10;
  min-width: 200px;
}

.dropdown-menu li {
  padding: 10px 20px;
}

.dropdown-menu li a {
  text-decoration: none;
  color: black;
  font-size: 16px;
  display: block;
}

.dropdown-menu li a:hover {
  background-color: #f0f0f0;
}

.dropdown:hover .dropdown-menu {
  display: block;
}

.lang-dropdown {
  position: relative;
  display: inline-block;
}

.lang-btn {
  padding: 8px 20px;
  background: #4CAF50;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background 0.3s;
}

.lang-menu {
  display: none;
  position: absolute;
  right: 0;
  background: white;
  border: 1px solid #ddd;
  border-radius: 5px;
  padding: 0;
  margin-top: 5px;
  min-width: 80px;
  z-index: 1000;
  list-style: none;
}

.lang-menu.show {
  display: block;
}

.lang-menu li {
  padding: 10px;
  color: #333;
  cursor: pointer;
  transition: background 0.2s;
  text-align: center;
}

.lang-menu li:hover {
  background: #f5f5f5;
}

.banner-image {
  width: 100%;
  height: 70vh;
  background: var(--image-url) no-repeat center center;
  background-size: cover;
}

.head_content_calc {
  width: 100%;
  background-color: #ffffff;
  box-sizing: border-box;
  padding: 50px 20% 50px 15%;
  position: relative;
}

.head_content_calc_h1 {
  font-size: 45px;
  color: #000000;
  text-align: left;
}

.head_content_calc_p {
  margin: 20px 0 0px 0;
  font-size: 20px;
  color: #000000;
}

.head_content_calc_line {
  position: absolute;
  left: 10%;
  width: 80%;
  height: 3px;
  background-color: #000;
  margin-top: 30px;
}

.calculator-container {
  padding: 100px 3%;
  background-color: #ffffff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 20vh;
}

.columns {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  width: 100%;
  flex-flow: row wrap;
}

.column {
  flex: 1 1 350px;
  min-width: 350px;
  max-width: 500px;
  padding: 5px 50px;
  box-sizing: border-box;
  border-radius: 15px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
  border: 2px solid black;
  margin-top: 30px;
}

.column h2 {
  text-align: center;
  margin-bottom: 30px;
  font-size: 200%;
  color: #2c2c2c;
}

.form-group {
  margin-bottom: 15px;
  flex-direction: column;
  align-items: flex-start;
  width: 100%;
}

label {
  margin-bottom: 10px;
  font-size: 20px;
  width: 100%;
  text-align: left;
}

input, select {
  width: 100%;
  padding: 10px;
  font-size: 20px;
  border: none;
  border-radius: 5px;
  background: #444;
  color: #fff;
  box-sizing: border-box;
}

input::placeholder {
  color: #aaa;
}

.button-wrapper {
  width: 100%;
  text-align: center;
  margin-top: 50px;
}

.calculate-button {
  background-color: #444;; 
  color: rgb(255, 255, 255); 
  padding: 20px 40px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-size: 30px;
}

.calculate-button:hover {
  background-color: #5e5e5e;
}

.result {
  margin-top: 20px;
  font-size: 40px;
  color: #000000;
  text-align: center;
  border-radius: 10px;
  border: 2px solid black;
}

footer {
    background-color: #222;
    color: white;
    padding: 40px 20px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;

}
footer .footer-section {
    flex: 1;
    margin: 10px;
}
footer h3 {
    margin-bottom: 20px;
}
footer ul {
    list-style: none;
    padding: 0;
}
footer ul li {
    margin: 10px 0;
}
footer ul li a {
    color: white;
    text-decoration: none;
}
footer p, footer ul li {
    color: white;
}
.footer-content {
    display: flex;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    gap: 200px;
}

.footer-column {
    flex: 1;
    min-width: 250px;
}