:root {
  --teal: #1a8a8a;
  --blue: #0d3d5c;
  --mint: #7ee8c7;
  --white: #ffffff;
  --gray-50: #f8fafb;
  --gray-100: #eef2f5;
  --gray-200: #dde4ea;
  --gray-600: #5a6b7a;
  --gray-800: #2d3748;
  --shadow: 0 4px 24px rgba(13, 61, 92, 0.12);
  --radius: 12px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.6;
  min-height: 100vh;
}

header {
  background: linear-gradient(135deg, var(--teal) 0%, var(--blue) 100%);
  color: var(--white);
  padding: 1.5rem 2rem;
  box-shadow: var(--shadow);
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo {
  width: 48px;
  height: 48px;
  border-radius: 10px;
}

.brand h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand p {
  font-size: 0.875rem;
  opacity: 0.85;
}

body > nav {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  gap: 0.25rem;
  padding: 0 2rem;
  overflow-x: auto;
}

.tab {
  background: none;
  border: none;
  padding: 1rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--gray-600);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: color 0.15s, border-color 0.15s;
  white-space: nowrap;
}

.tab-with-icon {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.app-icon {
  width: 20px;
  height: 20px;
  border-radius: 5px;
  flex-shrink: 0;
}

.app-icon-md {
  width: 40px;
  height: 40px;
  border-radius: 9px;
  flex-shrink: 0;
}

.app-icon-lg {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  flex-shrink: 0;
}

.app-heading {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 0.75rem;
}

.app-heading h2 {
  margin-bottom: 0;
}

.app-heading .badge {
  margin-bottom: 0.35rem;
}

.tab:hover {
  color: var(--teal);
}

.tab.active {
  color: var(--teal);
  border-bottom-color: var(--mint);
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem;
}

.panel {
  display: none;
}

.panel.active {
  display: block;
}

.subnav {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1rem;
  padding: 0.25rem;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow-x: auto;
}

.subtab {
  background: none;
  border: none;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-600);
  cursor: pointer;
  border-radius: 8px;
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}

.subtab:hover {
  color: var(--teal);
  background: var(--gray-100);
}

.subtab.active {
  color: var(--teal);
  background: var(--gray-100);
}

.issuemerge-view {
  display: none;
}

.issuemerge-view.active {
  display: block;
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

.card h2 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--blue);
}

.card h3 {
  font-size: 1.125rem;
  margin: 1.5rem 0 0.5rem;
  color: var(--teal);
}

.card p {
  margin-bottom: 0.75rem;
  color: var(--gray-600);
}

.card ul,
.card ol {
  margin: 0.5rem 0 1rem 1.25rem;
  color: var(--gray-600);
}

.card li {
  margin-bottom: 0.35rem;
}

.card h4 {
  font-size: 1rem;
  margin: 1.25rem 0 0.5rem;
  color: var(--gray-800);
}

.policy-meta {
  font-size: 0.875rem;
  color: var(--gray-600);
  margin-bottom: 1.25rem;
}

.policy-notice {
  background: var(--gray-100);
  border-left: 4px solid var(--mint);
  padding: 1rem 1.25rem;
  margin: 1rem 0 1.5rem;
  font-size: 0.9375rem;
  color: var(--gray-600);
}

.policy code {
  font-size: 0.875rem;
  background: var(--gray-100);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}

.policy-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0 1rem;
  font-size: 0.9375rem;
}

.policy-table th,
.policy-table td {
  border: 1px solid var(--gray-200);
  padding: 0.65rem 0.85rem;
  text-align: left;
  color: var(--gray-600);
}

.policy-table th {
  background: var(--gray-100);
  color: var(--gray-800);
  font-weight: 600;
}

.policy-link {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-200);
}

.inline-link {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  color: var(--teal);
  cursor: pointer;
  text-decoration: underline;
}

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

.footer-link {
  color: var(--gray-600);
}

.contact-form {
  margin-top: 1.5rem;
  max-width: 32rem;
}

.form-field {
  margin-bottom: 1.25rem;
}

.form-field label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 0.4rem;
}

.form-field .optional {
  font-weight: 400;
  color: var(--gray-600);
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font: inherit;
  font-size: 0.9375rem;
  color: var(--gray-800);
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(26, 138, 138, 0.15);
}

.form-field textarea {
  resize: vertical;
  min-height: 8rem;
}

.honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  overflow: hidden;
}

.btn-primary {
  display: inline-block;
  padding: 0.7rem 1.5rem;
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--white);
  background: linear-gradient(135deg, var(--teal), var(--blue));
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}

.btn-primary:hover:not(:disabled) {
  opacity: 0.92;
}

.btn-primary:active:not(:disabled) {
  transform: translateY(1px);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

a.btn-primary {
  text-decoration: none;
}

.cta-row {
  margin: 0.75rem 0 1.25rem;
}

.form-status {
  margin-bottom: 1rem;
  font-size: 0.9375rem;
  min-height: 1.25rem;
}

.form-status.success {
  color: var(--teal);
}

.form-status.error {
  color: #c53030;
}

.contact-alt {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-200);
  font-size: 0.9375rem;
  color: var(--gray-600);
}

.doc-toc {
  position: static;
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0 2rem;
}

.doc-toc h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1rem;
}

.doc-toc ol {
  margin: 0 0 0 1.25rem;
  color: var(--gray-600);
}

.doc-toc li {
  margin-bottom: 0.35rem;
}

.doc-section {
  scroll-margin-top: 5rem;
  padding-top: 0.5rem;
}

.doc-section + .doc-section {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-200);
}

.doc-loading {
  color: var(--gray-600);
}

.screenshot {
  margin: 1.25rem 0 1.75rem;
}

.screenshot-frame {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--gray-100);
  border: 2px dashed var(--gray-200);
  min-height: 12rem;
}

.screenshot-frame img {
  display: none;
  width: 100%;
  height: auto;
  vertical-align: middle;
}

.screenshot-frame.loaded {
  border-style: solid;
  border-color: var(--gray-200);
  background: var(--white);
}

.screenshot-frame.loaded img {
  display: block;
}

.screenshot-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 12rem;
  padding: 1.5rem;
  text-align: center;
  color: var(--gray-600);
}

.screenshot-frame.loaded .screenshot-placeholder {
  display: none;
}

.screenshot-filename {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--teal);
  background: var(--white);
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  border: 1px solid var(--gray-200);
}

.screenshot-capture {
  font-size: 0.875rem;
  max-width: 28rem;
  line-height: 1.5;
}

.screenshot figcaption {
  margin-top: 0.6rem;
  font-size: 0.875rem;
  color: var(--gray-600);
  text-align: center;
}

.screenshot-grid {
  display: grid;
  gap: 1rem;
  margin: 1.25rem 0 1.75rem;
}

@media (min-width: 640px) {
  .screenshot-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.screenshot-grid .screenshot {
  margin: 0;
}

.screenshot-grid .screenshot-frame,
.screenshot-grid .screenshot-placeholder {
  min-height: 10rem;
}

.video {
  margin: 1.25rem 0 1.75rem;
}

.video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--gray-100);
  border: 2px dashed var(--gray-200);
}

.video-frame video,
.video-frame iframe {
  display: none;
  width: 100%;
  height: 100%;
  border: 0;
  object-fit: contain;
  background: #000;
}

.video-frame.loaded {
  border-style: solid;
  border-color: var(--gray-200);
}

.video-frame.loaded video,
.video-frame.loaded iframe {
  display: block;
}

.video-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1.5rem;
  text-align: center;
  color: var(--gray-600);
}

.video-frame.loaded .video-placeholder {
  display: none;
}

.video-label {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--teal);
  background: var(--white);
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  border: 1px solid var(--gray-200);
}

.video-hint {
  font-size: 0.875rem;
  max-width: 28rem;
  line-height: 1.5;
}

.video figcaption {
  margin-top: 0.6rem;
  font-size: 0.875rem;
  color: var(--gray-600);
  text-align: center;
}

.badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--teal), var(--blue));
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
}

.plugin-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.plugin-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--gray-100);
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
  text-align: left;
  width: 100%;
  font: inherit;
  color: inherit;
}

.plugin-card:hover {
  border-color: var(--mint);
  box-shadow: 0 2px 12px rgba(26, 138, 138, 0.15);
}

.plugin-card strong {
  display: block;
  font-size: 1.0625rem;
  color: var(--blue);
}

.plugin-card span {
  font-size: 0.875rem;
  color: var(--gray-600);
}

footer {
  text-align: center;
  padding: 2rem;
  color: var(--gray-600);
  font-size: 0.875rem;
}

footer p + p {
  margin-top: 0.5rem;
}

a {
  color: var(--teal);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  header,
  main {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .nav-inner {
    padding: 0 1rem;
  }

  .card {
    padding: 1.5rem;
  }
}