/* ===== BASE STYLES ===== */
:root {
  --header-bg-start: #3f51b5; /* Deeper blue for gradient start */
  --header-bg-end: #673ab7;   /* Purple for gradient end */
  --header-text-color: #ffffff;
  --footer-bg-color: #2c3e50; /* Dark blue-grey from image */
  --footer-text-color: #cccccc;
  --footer-link-color: #eeeeee;
  --body-bg-color: #f3f7fa; /* Original body background */
  --converter-card-bg: #fff; /* Original container background */
  --converter-card-shadow: rgba(0, 0, 0, 0.1); /* Original container shadow */
  --converter-h1-color: #0077b6; /* Original h1 color */
  --button-color: #0077b6; /* Original button background */
  --button-hover-color: #005f87;
  --result-text-color: #444;
  --section-bg: #fefefe; /* Original section background */
  --section-shadow: rgba(0, 0, 0, 0.08);
  --section-h2-color: #2c3e50; /* Original section h2 color */
  --section-p-li-color: #333;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', sans-serif;
}

body {
  background-color: var(--body-bg-color);
  color: #333;
  min-height: 100vh;
  display: flex;
  flex-direction: column; /* Stack header, main, footer vertically */
}

/* Header Styles */
.main-header {
  background: linear-gradient(135deg, var(--header-bg-start), var(--header-bg-end));
  padding: 15px 30px;
  color: var(--header-text-color);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.logo-section {
  display: flex;
  align-items: center;
}

.header-logo {
  width: 40px;
  height: 40px;
  margin-right: 10px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.918);
  padding: 2px;
}

.site-title {
  font-size: 24px;
  font-weight: bold;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 25px;
}

.main-nav ul li a {
  color: var(--header-text-color);
  text-decoration: none;
  font-size: 17px;
  font-weight: 500;
  transition: opacity 0.3s ease;
}

.main-nav ul li a:hover {
  opacity: 0.8;
}

.hamburger-menu {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 6px;
}

.hamburger-menu .bar {
  width: 25px;
  height: 3px;
  background-color: var(--header-text-color);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.mobile-nav {
  display: none;
  background: var(--header-bg-end);
  width: 100%;
  position: absolute;
  top: 70px; /* Height of header + padding */
  left: 0;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  transform: translateY(-100%);
  transition: transform 0.3s ease-in-out;
  z-index: 999;
}

.mobile-nav.active {
  display: block;
  transform: translateY(0);
}

.mobile-nav ul {
  list-style: none;
  padding: 10px 0;
  text-align: center;
}

.mobile-nav ul li {
  padding: 12px 20px;
}

.mobile-nav ul li a {
  color: var(--header-text-color);
  text-decoration: none;
  font-size: 18px;
  display: block;
}

.mobile-nav ul li a:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 5px;
}

/* Hamburger animation */
.hamburger-menu.active .bar:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}
.hamburger-menu.active .bar:nth-child(2) {
  opacity: 0;
}
.hamburger-menu.active .bar:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* Main Content Wrapper */
.content-wrapper {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  align-items: center; /* Center converter-card and sections */
  padding: 20px; /* Overall padding for the main content area */
  width: 100%; /* Ensure it spans full width */
  box-sizing: border-box;
}

/* Converter Card (formerly .container) */
.converter-card {
  max-width: 500px;
  width: 100%;
  margin-top: 20px; /* Space from header */
  margin-bottom: 20px; /* Space before first section */
  padding: 2rem;
  background: var(--converter-card-bg);
  border-radius: 12px;
  box-shadow: 0 6px 16px var(--converter-card-shadow);
  text-align: center;
}

.converter-card h1 {
  color: var(--converter-h1-color);
  margin-bottom: 1.5rem;
  display: flex; /* For icon alignment */
  align-items: center;
  justify-content: center;
  flex-wrap: wrap; /* Allow wrapping on small screens */
}

.converter-box {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

label {
  font-weight: bold;
  text-align: left;
}

input, select {
  padding: 0.6rem;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 8px;
}

button {
  background-color: var(--button-color);
  color: white;
  padding: 0.7rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background-color: var(--button-hover-color);
}

.result {
  margin-top: 1rem;
  font-size: 1.2rem;
  color: var(--result-text-color);
}

.icon-small {
  width: 50px;
  height: 50px;
  vertical-align: middle;
  margin-right: 16px;
  flex-shrink: 0; /* Prevents icon from shrinking */
}

/* Section Styles */
section {
  background-color: var(--section-bg);
  margin: 20px auto; /* Adjusted margin for consistency with content-wrapper padding */
  padding: 25px;
  max-width: 850px;
  width: 100%; /* Ensure it takes full width of content-wrapper */
  border-radius: 12px; /* Original border-radius */
  box-shadow: 0 0 12px var(--section-shadow);
}

section h2 { /* Targeting h2 specific to sections */
  color: var(--section-h2-color); /* Original h2 color */
  font-size: 26px;
  margin-bottom: 12px;
  text-align: left; /* Keep left aligned */
}

section p, section li { /* Targeting p and li specific to sections */
  color: var(--section-p-li-color); /* Original p, li color */
  font-size: 17px;
  line-height: 1.7;
  text-align: justify;
}

section ol {
  padding-left: 22px;
}

/* Footer Styles */
.main-footer {
  background-color: var(--footer-bg-color);
  color: var(--footer-text-color);
  padding: 40px 20px 20px;
  margin-top: auto; /* Pushes footer to the bottom */
  width: 100%;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); /* Responsive grid */
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section {
  padding: 10px;
  text-align: left; /* Default left align */
}

.footer-logo-section {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
}

.footer-logo {
  width: 35px;
  height: 35px;
  margin-right: 10px;
  border-radius: 0.5rem;
  background: #fefeff; /* White background for favicon */
  padding: 2px;
}

.footer-site-title {
  font-size: 20px;
  font-weight: bold;
  color: var(--footer-link-color);
}

.footer-section h3 {
  color: var(--footer-link-color);
  font-size: 18px;
  margin-bottom: 15px;
}

.footer-section p {
  font-size: 15px;
  line-height: 1.6;
  text-align: left;
  margin-bottom: 0;
  color: var(--footer-text-color);
}

.footer-section ul {
  list-style: none;
  padding: 0;
}

.footer-section ul li {
  margin-bottom: 8px;
}

.footer-section ul li a {
  color: var(--footer-text-color);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.3s ease;
}

.footer-section ul li a:hover {
  color: var(--footer-link-color);
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  font-size: 14px;
  color: var(--footer-text-color);
}

/* Sticky chat icon contact styles */
.sticky-chat-icon {
  display: inline-block;
  text-decoration: none;
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 9999;
  cursor: pointer;
}

.sticky-chat-icon > div:first-child { /* The inner circle */
  width: 50px;
  height: 50px;
  background-color: #8800f8;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s ease;
}

.sticky-chat-icon svg { /* The SVG icon */
  width: 25px;
  height: 25px;
  fill: white;
}

.sticky-chat-icon > div:last-child { /* The wave effect */
  position: absolute;
  width: 80px;
  height: 80px;
  background: #8800f8;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: -1;
  opacity: 0.4;
  animation: wave 2s infinite linear;
}

@keyframes wave {
  0% {
    transform: translate(-50%, -50%) scale(0.8);
    opacity: 0.4;
  }
  70% {
    transform: translate(-50%, -50%) scale(1.3);
    opacity: 0.1;
  }
  100% {
    transform: translate(-50%, -50%) scale(1.4);
    opacity: 0;
  }
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .main-header {
    padding: 10px 20px;
  }

  .main-nav {
    display: none;
  }

  .hamburger-menu {
    display: flex;
  }

  .site-title {
    font-size: 20px;
  }

  .header-logo {
    width: 35px;
    height: 35px;
  }

  .converter-card {
    padding: 1.5rem;
    margin: 20px auto;
  }

  .converter-card h1 {
    font-size: 1.4rem;
  }

  .icon-small {
    width: 40px;
    height: 40px;
    margin-right: 10px;
  }

  button {
    font-size: 0.95rem;
  }

  .result {
    font-size: 1.1rem;
  }

  /* Footer responsiveness */
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-section {
    padding: 15px 0;
  }

  .footer-logo-section {
    justify-content: center;
  }

  .footer-section p, .footer-section ul {
    text-align: center;
  }
  .footer-section ul {
    align-items: center;
  }

  /* Sticky chat icon responsive adjustments */
  .sticky-chat-icon {
    bottom: 20px !important;
    right: 20px !important;
  }

  .sticky-chat-icon > div:first-child {
    width: 45px !important;
    height: 45px !important;
  }

  .sticky-chat-icon svg {
    width: 22px !important;
    height: 22px !important;
  }

  .sticky-chat-icon > div:last-child {
    width: 65px !important;
    height: 65px !important;
  }

  /* Section adjustments */
  section {
    padding: 20px;
  }
  section h2 {
    font-size: 22px;
    text-align: center; /* Center section headings on mobile */
  }
  section p, section li {
    font-size: 15px;
  }
}

@media (max-width: 480px) {
  .converter-card {
    padding: 1rem;
  }

  .converter-card h1 {
    font-size: 1.2rem;
  }

  .icon-small {
    width: 35px;
    height: 35px;
  }

  button {
    font-size: 0.85rem;
    padding: 0.6rem;
  }

  section h2 {
    font-size: 20px;
  }
  section p, section li {
    font-size: 14px;
  }
}