:root {
  --primary-color: #0056ff;
  --secondary-color: #f4f7fc;
  --text-color: #333;
  --heading-color: #1a253c;
  --white-color: #fff;
  --border-color: #e0e0e0;
  --shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

body {
  font-family: 'Poppins', sans-serif;
  margin: 0;
  background-color: var(--secondary-color);
  color: var(--text-color);
  line-height: 1.6;
}

.container {
  max-width: 1100px;
  margin: auto;
  padding: 20px;
}

header {
  background: var(--white-color);
  box-shadow: var(--shadow);
  padding: 15px 20px;
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 700;
  text-decoration: none;
  color: var(--primary-color);
  font-size: 24px;
}

nav a {
  margin-left: 20px;
  text-decoration: none;
  color: var(--primary-color);
  font-weight: 500;
  transition: color 0.3s ease;
}

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

.breadcrumb {
  margin: 15px 0;
  color: #555;
  font-size: 14px;
}

.tool-box {
  background: var(--white-color);
  padding: 30px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  text-align: center;
}

.tool-icon {
  width: 80px;
  height: 80px;
  margin-bottom: 15px;
}

h1 {
  color: var(--heading-color);
  margin-bottom: 10px;
}

.description {
  max-width: 700px;
  margin: 0 auto 30px;
  color: #555;
}

.calculator-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 20px;
  text-align: left;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--heading-color);
}

.form-group input {
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 16px;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 86, 255, 0.1);
}

button#calculateBtn {
  background: var(--primary-color);
  color: var(--white-color);
  border: none;
  padding: 15px 30px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 18px;
  font-weight: 600;
  transition: background-color 0.3s, transform 0.2s;
  grid-column: 1 / -1; /* Span full width in grid */
  margin-top: 10px;
}

button#calculateBtn:hover {
  background-color: #0044cc;
  transform: translateY(-2px);
}

.results-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 30px;
  text-align: center;
}

.result-item {
  background-color: var(--secondary-color);
  padding: 20px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.result-item h3 {
  margin: 0 0 10px;
  color: var(--heading-color);
  font-size: 16px;
}

.result-item p {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  color: var(--primary-color);
}

section {
  background: var(--white-color);
  padding: 30px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  margin-top: 30px;
}

h2 {
  text-align: center;
  color: var(--heading-color);
  margin-bottom: 20px;
}

ul {
  list-style-type: none;
  padding: 0;
}

ul li {
  background: var(--secondary-color);
  padding: 15px;
  margin-bottom: 10px;
  border-radius: 8px;
  border-left: 4px solid var(--primary-color);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.card {
  background: var(--secondary-color);
  padding: 25px;
  border-radius: 12px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.card img {
  width: 50px;
  height: 50px;
  margin-bottom: 15px;
}

.card h3 {
    color: var(--heading-color);
    margin: 10px 0;
}

.card p {
    font-size: 14px;
    color: #555;
}

.card button {
  background: var(--primary-color);
  color: var(--white-color);
  border: none;
  padding: 10px 20px;
  border-radius: 6px;
  cursor: pointer;
  margin-top: 15px;
  transition: background-color 0.3s;
}

.card button:hover {
  background-color: #0044cc;
}

.faq {
  margin-top: 30px;
}

.faq-item {
  background: var(--secondary-color);
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 15px;
  border-left: 4px solid var(--primary-color);
}

.faq-item h3 {
    margin: 0 0 10px;
    color: var(--heading-color);
}

.footer {
  text-align: center;
  padding: 25px;
  background: var(--heading-color);
  margin-top: 40px;
  color: #aab4c3;
}

.footer-links {
    margin-bottom: 15px;
}

.footer-links a {
    margin: 0 12px;
    text-decoration: none;
    color: var(--white-color);
    font-weight: 500;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--primary-color);
}

#backToTop {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--primary-color);
  color: var(--white-color);
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  font-size: 24px;
  cursor: pointer;
  display: none;
  transition: opacity 0.3s, transform 0.3s;
}

#backToTop:hover {
    opacity: 0.9;
    transform: scale(1.1);
}
/* style.css */

/* --- Global Styles & Variables --- */
:root {
  --primary: #0056ff;
  --secondary: linear-gradient(135deg, #00E0FF, #00FFFF); /* Bright Cyan Gradient */
  --text: #222;
}

body {
  font-family: Poppins, sans-serif;
  margin: 0;
  background: var(--secondary);
  color: var(--text);
}

.container {
  max-width: 1200px;
  margin: auto;
  padding: 20px;
}

/* --- Header Styles --- */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: linear-gradient(90deg, #0056ff, #00aaff);
  padding: 15px 30px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  border-bottom-left-radius: 12px;
  border-bottom-right-radius: 12px;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: auto;
}

/* Logo */
.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: transform 0.3s ease;
}

.logo-img {
  margin-right: 12px;
  filter: brightness(1) invert(0.9) sepia(0.8) saturate(3) hue-rotate(45deg);
}

.logo-text {
  font-size: 24px;
  color: #fff;
  text-shadow: 1px 1px 5px rgba(0,0,0,0.3);
  font-weight: 700;
}

/* Navbar links */
#navbar {
  display: flex;
  align-items: center;
  gap: 20px;
}

#navbar a {
  color: #fff;
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  transition: all 0.3s ease;
  padding: 5px 0;
}

#navbar a:hover {
  color: #fffa;
  transform: scale(1.1);
}

/* Hamburger Icon */
#hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
  z-index: 1002;
}

#hamburger span {
  width: 25px;
  height: 3px;
  background: #fff;
  border-radius: 3px;
  transition: all 0.3s ease;
}

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

.dropbtn {
  background: none;
  border: none;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  font-size: 16px;
  font-family: Poppins, sans-serif;
}

.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: #0056ff;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  min-width: 180px;
  z-index: 999;
  border: 1px solid #004acb;
}

.dropdown-content a {
  display: block;
  padding: 10px 15px;
  color: #ffffff;
  text-decoration: none;
  transition: background-color 0.2s ease;
}

.dropdown-content a:hover {
  background-color: #004acb;
}

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

/* --- Mobile Responsive Menu --- */
@media screen and (max-width: 768px) {
  #hamburger {
    display: flex;
  }

  #navbar {
    position: fixed;
    top: 80px;
    right: 15px;
    width: 250px;
    background: linear-gradient(180deg, #0056ff, #00399d);
    flex-direction: column;
    align-items: flex-start;
    padding: 10px 0;
    gap: 0;
    box-shadow: -5px 5px 15px rgba(0,0,0,0.25);
    z-index: 1001;
    border-radius: 12px;
    transform: translateX(110%);
    transition: transform 0.3s ease-in-out;
  }

  #navbar.show {
    display: flex;
    transform: translateX(0);
  }

  #navbar a, .dropdown {
    padding: 15px 25px;
    text-align: left;
    width: 100%;
    box-sizing: border-box;
  }

  .dropdown-content {
    position: static;
    display: none;
    background: rgba(0, 0, 0, 0.2);
    box-shadow: none;
    border-radius: 0;
    border: none;
    min-width: 100%;
  }

  .dropdown-content a {
    color: #e0f7ff;
    font-weight: normal;
    padding-left: 40px;
  }

  .dropdown.active .dropdown-content {
    display: block;
  }
}

/* --- Footer Styles --- */
footer a {
  text-decoration: none;
  color: var(--primary);
  margin-right: 15px;
}

footer a:hover {
  color: #0039c1;
}

/* Social media icon hover effect */
.footer-social a:hover {
    transform: scale(1.15);
}