:root {
  --primary-blue: #0066cc;
  --primary-blue-hover: #0052a3;
  --primary-green: #009b3a;
  --primary-green-hover: #007a2e;
  --dark: #1a1a1a;
  --dark-light: #2d2d2d;
  --white: #ffffff;
  --off-white: #f8f9fa;
  --gray-light: #e9ecef;
  --gray-medium: #6c757d;
  --gray-dark: #495057;
  --danger-color: #dc3545;
  --warning-color: #ffc107;
  --border-color: #dee2e6;
}

i[data-lucide] {
  width: 24px;
  height: 24px;
  stroke-width: 2;
}

.inline-icon {
  width: 28px;
  height: 28px;
  vertical-align: middle;
  margin-right: 8px;
  display: inline-block;
}

.inline-icon.success {
  color: var(--primary-green);
  stroke-width: 2.5;
}

.inline-icon.warning {
  color: var(--warning-color);
  stroke-width: 2.5;
}

.info-card .icon i[data-lucide] {
  width: 48px;
  height: 48px;
  stroke-width: 2;
  color: var(--primary-blue);
}

.info-card:nth-child(1) .icon i[data-lucide] {
  color: var(--primary-green);
}

.info-card:nth-child(2) .icon i[data-lucide] {
  color: var(--primary-blue);
}

.info-card:nth-child(3) .icon i[data-lucide] {
  color: var(--primary-green);
}

.info-card:nth-child(4) .icon i[data-lucide] {
  color: var(--gray-dark);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  background: var(--white);
  color: var(--dark);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

header {
  text-align: center;
  padding: 60px 20px 40px;
  background: var(--dark);
  border-bottom: 4px solid var(--primary-green);
}

.logo h1 {
  font-size: 3.5rem;
  margin-bottom: 8px;
  color: var(--white);
  font-weight: 700;
  letter-spacing: -1px;
}

.logo h1 .highlight {
  color: var(--primary-green);
}

.logo p {
  font-size: 1.1rem;
  color: var(--gray-light);
  font-weight: 300;
  margin-bottom: 5px;
}

.logo .powered {
  font-size: 0.85rem;
  color: var(--gray-medium);
  margin-top: 10px;
}

.logo .powered span {
  color: var(--primary-blue);
  font-weight: 600;
}

main {
  background: var(--off-white);
  padding: 60px 20px;
}

.hero {
  text-align: center;
  margin-bottom: 60px;
  padding: 0 20px;
}

.hero h2 {
  font-size: 2.8rem;
  color: var(--dark);
  margin-bottom: 20px;
  font-weight: 700;
  line-height: 1.2;
}

.subtitle {
  font-size: 1.2rem;
  color: var(--gray-dark);
  font-weight: 300;
}

.subtitle .badge {
  display: inline-block;
  background: var(--primary-green);
  color: var(--white);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  margin: 0 5px;
  font-weight: 600;
}

.card {
  background: var(--white);
  border-radius: 12px;
  padding: 40px;
  margin-bottom: 30px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--border-color);
}

.card h3 {
  font-size: 1.75rem;
  margin-bottom: 25px;
  color: var(--dark);
  font-weight: 600;
  padding-bottom: 15px;
  border-bottom: 3px solid var(--primary-blue);
  display: inline-block;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--dark);
  font-size: 0.95rem;
}

.form-group input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--border-color);
  border-radius: 6px;
  font-size: 1rem;
  transition: all 0.3s;
  background: var(--white);
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group small {
  display: block;
  margin-top: 6px;
  color: var(--gray-medium);
  font-size: 0.875rem;
}

.btn {
  padding: 14px 32px;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 0.9rem;
}

.btn-primary {
  background: var(--primary-green);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--primary-green-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 155, 58, 0.3);
}

.btn-secondary {
  background: var(--primary-blue);
  color: var(--white);
  margin-left: 10px;
}

.btn-secondary:hover {
  background: var(--primary-blue-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
}

.btn-copy {
  padding: 8px 16px;
  font-size: 0.8rem;
  margin-left: 10px;
  background: var(--dark);
  color: var(--white);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn-copy:hover {
  background: var(--dark-light);
  transform: translateY(-1px);
}

.dns-record {
  background: var(--off-white);
  border: 2px solid var(--primary-blue);
  border-radius: 8px;
  padding: 25px;
  margin: 25px 0;
}

.record-item {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
  flex-wrap: wrap;
}

.record-item:last-child {
  margin-bottom: 0;
}

.record-item .label {
  font-weight: 700;
  min-width: 80px;
  color: var(--dark);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
}

.record-item code {
  background: var(--white);
  padding: 10px 16px;
  border-radius: 4px;
  flex: 1;
  margin-right: 10px;
  word-break: break-all;
  border: 1px solid var(--border-color);
  font-family: "SF Mono", "Monaco", "Inconsolata", "Roboto Mono", monospace;
  font-size: 0.9rem;
}

.instructions {
  background: var(--white);
  border-left: 4px solid var(--primary-green);
  padding: 25px;
  margin: 25px 0;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  border-left-width: 4px;
}

.instructions h4 {
  margin-bottom: 18px;
  color: var(--dark);
  font-weight: 600;
}

.instructions ol {
  margin-left: 20px;
}

.instructions li {
  margin-bottom: 12px;
  color: var(--gray-dark);
  line-height: 1.6;
}

.action-buttons {
  margin-top: 30px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.dns-check-result {
  margin-top: 20px;
  padding: 15px;
  border-radius: 8px;
  display: none;
}

.dns-check-result.info {
  display: block;
  background: #dbeafe;
  border-left: 4px solid #3b82f6;
  color: #1e40af;
}

.dns-check-result.error {
  display: block;
  background: #fee2e2;
  border-left: 4px solid var(--danger-color);
  color: #991b1b;
}

.dns-check-result.success {
  display: block;
  background: #d1fae5;
  border-left: 4px solid var(--success-color);
  color: #065f46;
}

.session-info {
  margin-top: 35px;
  padding: 25px;
  background: var(--white);
  border-radius: 6px;
  border: 2px dashed var(--primary-blue);
}

.session-url {
  display: flex;
  align-items: center;
  margin-top: 10px;
  flex-wrap: wrap;
}

.session-url code {
  flex: 1;
  padding: 10px;
  background: white;
  border-radius: 5px;
  word-break: break-all;
  border: 1px solid var(--border-color);
  margin-right: 10px;
}

.certificate-section {
  margin-bottom: 30px;
}

.certificate-section h4 {
  margin-bottom: 15px;
  color: var(--text-color);
}

.certificate-section textarea {
  width: 100%;
  min-height: 200px;
  padding: 15px;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-family: "Courier New", monospace;
  font-size: 0.9rem;
  margin-bottom: 10px;
  resize: vertical;
}

.installation-guide {
  background: var(--code-bg);
  padding: 20px;
  border-radius: 8px;
  margin-top: 30px;
}

.installation-guide h4 {
  margin-bottom: 10px;
  color: var(--text-color);
}

.installation-guide p {
  font-weight: 600;
  margin-top: 20px;
  margin-bottom: 10px;
}

.installation-guide pre {
  background: #1e293b;
  color: #e2e8f0;
  padding: 15px;
  border-radius: 5px;
  overflow-x: auto;
}

.installation-guide code {
  font-family: "Courier New", monospace;
  font-size: 0.9rem;
}

.important-note {
  background: #fff3cd;
  border-left: 4px solid var(--warning-color);
  padding: 25px;
  margin: 35px 0;
  border-radius: 6px;
  border: 1px solid #ffe69c;
  border-left-width: 4px;
}

.important-note h4 {
  margin-bottom: 15px;
  color: var(--dark);
  font-weight: 600;
}

.important-note ul {
  margin-left: 20px;
}

.important-note li {
  margin-bottom: 10px;
  color: var(--gray-dark);
}

.card.success {
  border: 3px solid var(--primary-green);
  box-shadow: 0 4px 12px rgba(0, 155, 58, 0.15);
}

.info-section {
  margin: 50px 0;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.info-card {
  background: var(--white);
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--border-color);
  text-align: center;
  transition: all 0.3s;
}

.info-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.info-card .icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

.info-card h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
  color: var(--dark);
  font-weight: 600;
}

.info-card p {
  color: var(--gray-dark);
  line-height: 1.6;
}

.faq-section {
  margin-top: 50px;
}

.faq-section h3 {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 30px;
  color: var(--text-color);
}

.faq details {
  background: var(--white);
  margin-bottom: 12px;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.faq summary {
  padding: 20px;
  cursor: pointer;
  font-weight: 600;
  color: var(--dark);
  transition: all 0.3s;
}

.faq summary:hover {
  background: var(--off-white);
}

.faq details[open] summary {
  background: var(--primary-blue);
  color: var(--white);
  border-bottom: 2px solid var(--primary-green);
}

.faq p {
  padding: 20px;
  color: var(--gray-dark);
  line-height: 1.6;
}

footer {
  text-align: center;
  padding: 40px 20px;
  background: var(--dark);
  color: var(--gray-light);
  margin-top: 60px;
  border-top: 4px solid var(--primary-green);
}

footer p {
  margin-bottom: 10px;
  font-size: 0.95rem;
}

footer .highlight {
  color: var(--primary-green);
  font-weight: 600;
}

footer a {
  color: var(--primary-blue);
  text-decoration: none;
  font-weight: 600;
}

footer a:hover {
  text-decoration: underline;
}

.loading {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.loading.hidden {
  display: none;
}

.spinner {
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top: 4px solid white;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.loading p {
  color: white;
  margin-top: 20px;
  font-size: 1.2rem;
}

.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 10000;
  min-width: 320px;
  max-width: 500px;
  background: var(--white);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  transform: translateX(120%);
  transition: transform 0.3s ease-in-out;
  border-left: 4px solid var(--primary-blue);
}

.notification:not(.hidden) {
  transform: translateX(0);
}

.notification.success {
  border-left-color: var(--primary-green);
}

.notification.error {
  border-left-color: var(--danger-color);
}

.notification.warning {
  border-left-color: var(--warning-color);
}

.notification.info {
  border-left-color: var(--primary-blue);
}

.notification-content {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  gap: 12px;
}

.notification-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
}

.notification.success .notification-icon {
  color: var(--primary-green);
}

.notification.error .notification-icon {
  color: var(--danger-color);
}

.notification.warning .notification-icon {
  color: var(--warning-color);
}

.notification.info .notification-icon {
  color: var(--primary-blue);
}

.notification-message {
  flex: 1;
  color: var(--dark);
  font-size: 0.95rem;
  line-height: 1.4;
}

.notification-close {
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: background 0.2s;
}

.notification-close:hover {
  background: var(--gray-light);
}

.notification-close i[data-lucide] {
  width: 18px;
  height: 18px;
  color: var(--gray-medium);
}

@media (max-width: 768px) {
  .logo h1 {
    font-size: 2rem;
  }

  .hero h2 {
    font-size: 1.8rem;
  }

  .card {
    padding: 20px;
  }

  .action-buttons {
    flex-direction: column;
  }

  .btn-secondary {
    margin-left: 0;
    margin-top: 10px;
  }

  .record-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .record-item code {
    width: 100%;
    margin-bottom: 10px;
  }

  .session-url {
    flex-direction: column;
  }

  .session-url code {
    width: 100%;
    margin-bottom: 10px;
  }

  .notification {
    top: 10px;
    right: 10px;
    left: 10px;
    min-width: auto;
    max-width: none;
  }
}

.terms-section {
  max-width: 900px;
  margin: 0 auto;
}

.terms-header {
  margin-bottom: 40px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary-blue);
  text-decoration: none;
  font-weight: 500;
  margin-bottom: 20px;
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--primary-blue-hover);
}

.back-link i {
  width: 20px;
  height: 20px;
}

.terms-header h2 {
  color: var(--dark);
  margin-bottom: 10px;
  font-size: 2em;
}

.terms-date {
  color: var(--gray-medium);
  font-size: 0.9em;
  margin: 0;
}

.terms-content {
  line-height: 1.7;
}

.terms-block {
  margin-bottom: 50px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
}

.terms-block:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.terms-block h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--primary-blue);
  margin-bottom: 30px;
  font-size: 1.5em;
}

.terms-block h3 i {
  width: 28px;
  height: 28px;
}

.terms-block h4 {
  color: var(--dark);
  margin-top: 30px;
  margin-bottom: 15px;
  font-size: 1.2em;
}

.terms-block p {
  color: var(--gray-dark);
  margin-bottom: 15px;
}

.terms-block ul {
  margin-bottom: 20px;
  padding-left: 25px;
}

.terms-block ul li {
  color: var(--gray-dark);
  margin-bottom: 10px;
}

.terms-block a {
  color: var(--primary-blue);
  text-decoration: none;
  transition: color 0.2s;
}

.terms-block a:hover {
  color: var(--primary-blue-hover);
  text-decoration: underline;
}

footer {
  margin-top: 60px;
  padding: 30px 0;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  text-align: center;
}

.footer-content p {
  color: var(--gray-medium);
  margin: 10px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.footer-content i {
  width: 18px;
  height: 18px;
  color: var(--danger-color);
}

.footer-links {
  font-size: 0.9em;
}

.footer-links a {
  color: var(--primary-blue);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--primary-blue-hover);
  text-decoration: underline;
}

.footer-links span {
  color: var(--gray-medium);
  margin: 0 8px;
}

a,
a:link,
a:visited,
a:hover,
a:active,
a:focus {
  text-decoration: none !important;
  color: inherit !important;
}

a,
a:link,
a:visited,
a:active,
a:focus {
  text-decoration: none;
  color: inherit;
  outline: none;
}

a {
  position: relative;
  text-decoration: none;
  color: inherit;
}

a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0%;
  height: 2px;
  background: currentColor;
  transition: width 0.25s ease;
}

a:hover::after {
  width: 100%;
}