:root {
  --primary-color: #3498db;
  --secondary-color: #2980b9;
  --light-gray: #f5f8fa;
  --medium-gray: #e1e8ed;
  --dark-gray: #3d4852;
  --success-color: #27ae60;
  --warning-color: #f39c12;
  --danger-color: #e74c3c;
  --border-radius: 6px;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;

  --bg-color: var(--light-gray);
  --card-bg-color: white;
  --text-color: var(--dark-gray);
  --table-even-bg: var(--light-gray);
  --border-color: var(--medium-gray);
}

[data-theme="dark"] {
  --primary-color: #4fa2db;
  --secondary-color: #3490d1;
  --bg-color: #121212;
  --card-bg-color: #242424;
  --text-color: #e2e2e2;
  --table-even-bg: #333;
  --border-color: #444;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  color: var(--text-color);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: var(--bg-color);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
  width: 100%;
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin-right: -15px;
  margin-left: -15px;
}

.col-md-10 {
  position: relative;
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
}

.col-md-12 {
  position: relative;
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
}

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

@media (min-width: 768px) {
  .col-md-10 {
    flex: 0 0 83.333333%;
    max-width: 83.333333%;
  }
  
  .col-md-12 {
    flex: 0 0 100%;
    max-width: 100%;
  }
}

/* Header */
#top-row {
  margin-top: 2rem;
  margin-bottom: 1rem;
  text-align: center;
}

.logo {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -1px;
}

.logo-style1 {
  color: var(--primary-color);
  font-weight: 800;
}

.subtitle {
  color: var(--text-color);
  font-size: 1.1rem;
  margin-top: 0.5rem;
}

/* Form Elements */
.card {
  background-color: var(--card-bg-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  margin-bottom: 2rem;
}

#domain-container, #port-container, #submit-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

#port-container {
  margin-top: 1rem;
}

.form-label {
  font-weight: 600;
  margin-right: 0.5rem;
}

.form-control {
  flex: 1;
  min-width: 200px;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: var(--transition);
  background-color: var(--card-bg-color);
  color: var(--text-color);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

select.form-control {
  background-color: var(--card-bg-color);
  cursor: pointer;
}

.btn {
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn:hover {
  background-color: var(--secondary-color);
  transform: translateY(-2px);
}

/* Results Area */
#txtHint {
  color: var(--danger-color);
  font-weight: 600;
  display: block;
  margin-bottom: 1rem;
}

.info {
  margin-bottom: 2rem;
}

.info h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.info span {
  display: block;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.info table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.info th, .info td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.info th {
  background-color: var(--primary-color);
  color: white;
  font-weight: 600;
}

.info tr:nth-child(even) {
  background-color: var(--table-even-bg);
}

.info tr:last-child td {
  border-bottom: none;
}

/* Response Tables */
[class*="responseRow"] {
  margin-bottom: 2rem;
}

[class*="responseRow"] table {
  width: 100%;
  border-collapse: collapse;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

[class*="responseRow"] table tr td {
  padding: 1rem;
  background-color: var(--card-bg-color);
  border-bottom: 1px solid var(--border-color);
}

[class*="responseRow"] table tr:nth-child(2n) td {
  background-color: var(--table-even-bg);
}

[class*="responseRow"] table tr:last-child td {
  border-bottom: none;
}

.thead {
  background-color: var(--primary-color) !important;
  color: white;
  font-weight: 700;
  font-size: 1.25rem;
  text-align: center;
  padding: 1rem;
}

.left-row {
  width: 150px;
  font-weight: 600;
}

/* Loading Spinner */
.sk-three-bounce {
  margin: 3rem auto;
  width: 80px;
  text-align: center;
}

.sk-three-bounce .sk-child {
  width: 20px;
  height: 20px;
  background-color: var(--primary-color);
  border-radius: 100%;
  display: inline-block;
  animation: sk-three-bounce 1.4s ease-in-out 0s infinite both;
}

.sk-three-bounce .sk-bounce1 {
  animation-delay: -0.32s;
}

.sk-three-bounce .sk-bounce2 {
  animation-delay: -0.16s;
}

@keyframes sk-three-bounce {
  0%, 80%, 100% {
    transform: scale(0);
  }
  40% {
    transform: scale(1);
  }
}

/* Footer */
footer {
  padding: 2rem 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
  margin-top: 2rem;
}

footer a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

footer a:hover {
  text-decoration: underline;
  color: var(--secondary-color);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .form-control {
    width: 100%;
  }
  
  #domain-container, #port-container, #submit-container {
    flex-direction: column;
    align-items: stretch;
  }
  
  .form-label {
    margin-bottom: 0.5rem;
  }
  
  .btn {
    width: 100%;
  }
  
  .left-row {
    width: 100px;
  }
}

/* Theme Toggle */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 100px;
  z-index: 100;
  display: flex;
  align-items: center;
}

.theme-toggle-label {
  margin-right: 8px;
  font-weight: 600;
}

.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 26px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--dark-gray);
  transition: .4s;
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--primary-color);
}

input:focus + .slider {
  box-shadow: 0 0 1px var(--primary-color);
}

input:checked + .slider:before {
  transform: translateX(24px);
}

.slider .light-icon,
.slider .dark-icon {
  position: absolute;
  top: 6px;
  color: white;
  font-size: 14px;
}

.slider .light-icon {
  left: 7px;
}

.slider .dark-icon {
  right: 7px;
}

@media (max-width: 768px) {
  .theme-toggle {
    right: 10px;
    top: 10px;
  }
}

/* GitHub Corner */
.github-corner {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 100;
}

.github-corner svg {
  fill: var(--primary-color);
  color: white;
  position: absolute;
  top: 0;
  border: 0;
  right: 0;
}

.github-corner:hover .octo-arm {
  animation: octocat-wave 560ms ease-in-out;
}

@keyframes octocat-wave {
  0%, 100% {
    transform: rotate(0);
  }
  20%, 60% {
    transform: rotate(-25deg);
  }
  40%, 80% {
    transform: rotate(10deg);
  }
}

@media (max-width: 500px) {
  .github-corner:hover .octo-arm {
    animation: none;
  }
  .github-corner .octo-arm {
    animation: octocat-wave 560ms ease-in-out;
  }
}