:root {
  --canvas: #f8f9fa;
  --paper: #ffffff;
  --chrome-border: #dadce0;
  --chrome-text: #3c4043;
  --chrome-text-light: #5f6368;
  --docs-blue: #1a73e8;
  --docs-blue-bg: #e8f0fe;
  --link-blue: #1155cc;
  --ink: #202124;
  --font-chrome: 'Roboto', Arial, sans-serif;
  --font-body: Arial, Helvetica, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--canvas);
  font-family: var(--font-body);
  color: var(--ink);
}

.tab-radio {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.title-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 14px 24px 4px;
  background: var(--paper);
}

.doc-icon {
  width: 28px;
  height: 28px;
}

.doc-title {
  font-family: var(--font-chrome);
  font-size: 1.125rem;
  color: var(--chrome-text);
}

.menu-bar {
  display: flex;
  gap: 20px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 4px 24px 10px 62px;
  background: var(--paper);
  font-family: var(--font-chrome);
  font-size: 0.85rem;
  color: var(--chrome-text);
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 8px 24px;
  background: var(--paper);
  border-bottom: 1px solid var(--chrome-border);
  font-family: var(--font-chrome);
  font-size: 0.9rem;
  color: var(--chrome-text);
}

.tool-glyph {
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  cursor: default;
}

.tool-glyph:hover {
  background: var(--docs-blue-bg);
}

.tool-text {
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.85rem;
  cursor: default;
}

.tool-text:hover {
  background: var(--docs-blue-bg);
}

.tool-sep {
  width: 1px;
  height: 22px;
  background: var(--chrome-border);
  margin: 0 4px;
}

.app-window {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 210px 1fr 130px;
  align-items: start;
  background: var(--canvas);
}

.sidebar {
  padding: 24px 12px;
  min-height: calc(100vh - 220px);
}

.sidebar-heading {
  font-family: var(--font-chrome);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--chrome-text-light);
  margin: 0 0 10px 10px;
}

.tab-label {
  display: block;
  padding: 8px 10px;
  margin-bottom: 2px;
  border-radius: 4px;
  font-family: var(--font-chrome);
  font-size: 0.85rem;
  color: var(--chrome-text);
  cursor: pointer;
  border-left: 3px solid transparent;
}

.tab-label:hover {
  background: #f1f3f4;
}

.tab-mark {
  display: none;
}

#tab-welcome:checked ~ .app-window label[for="tab-welcome"],
#tab-about:checked ~ .app-window label[for="tab-about"],
#tab-gallery:checked ~ .app-window label[for="tab-gallery"],
#tab-links:checked ~ .app-window label[for="tab-links"],
#tab-extras:checked ~ .app-window label[for="tab-extras"] {
  background: var(--docs-blue-bg);
  border-left: 3px solid var(--docs-blue);
  color: var(--docs-blue);
  font-weight: 500;
}

.doc-page {
  position: relative;
  background: var(--paper);
  margin: 24px 0 40px;
  padding: 60px 72px 80px;
  min-height: calc(100vh - 220px);
  border: 1px solid var(--chrome-border);
}

.panel {
  display: none;
}

#tab-welcome:checked ~ .app-window #panel-welcome,
#tab-about:checked ~ .app-window #panel-about,
#tab-gallery:checked ~ .app-window #panel-gallery,
#tab-links:checked ~ .app-window #panel-links,
#tab-extras:checked ~ .app-window #panel-extras {
  display: block;
}

.eyebrow {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--chrome-text-light);
  margin: 0 0 4px;
}

h1 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1.75rem;
  margin: 0;
  color: var(--ink);
}

.rule {
  width: 100%;
  height: 1px;
  margin: 18px 0 28px;
  background: var(--chrome-border);
}

.doc-page p {
  font-size: 0.95rem;
  line-height: 1.85;
  max-width: 62ch;
  color: var(--ink);
}

.cursor {
  display: inline-block;
  margin-left: 1px;
  color: var(--docs-blue);
  animation: blink 1.1s steps(1) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.list-heading {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink);
  margin: 24px 0 10px;
}

.doc-list {
  padding-left: 22px;
  max-width: 55ch;
}

.doc-list li {
  margin-bottom: 8px;
  line-height: 1.7;
  font-size: 0.95rem;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  max-width: 560px;
}

.gallery-grid figure {
  margin: 0;
  border: 1px solid var(--chrome-border);
  padding: 6px;
  text-align: center;
}

.gallery-grid img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}

.gallery-grid figcaption {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--chrome-text-light);
  margin-top: 6px;
}

.link-list {
  list-style: none;
  padding: 0;
  max-width: 55ch;
}

.link-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--chrome-border);
}

.link-list a {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--link-blue);
  text-decoration: underline;
}

.link-list a:hover {
  color: var(--docs-blue);
}

.link-list p {
  margin: 4px 0 0;
  font-size: 0.9rem;
  color: var(--chrome-text-light);
}

.guestbook-box {
  margin-top: 24px;
  max-width: 55ch;
  padding: 20px 24px;
  background: var(--canvas);
  border: 1px solid var(--chrome-border);
}

.guestbook-title {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink);
  margin: 0 0 8px;
}

.guestbook-link {
  display: inline-block;
  margin-top: 10px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--link-blue);
  text-decoration: underline;
}

.page-wave {
  display: none;
}

.character-dock {
  position: sticky;
  top: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 10px;
  min-height: calc(100vh - 220px);
}

.halo {
  display: none;
}

.character-img {
  position: relative;
  width: 110px;
}

.character-img:hover {
  animation: bounce 0.6s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0) translateX(0); }
  50% { transform: translateY(-10px) translateX(4px); }
}

.bubble {
  display: none;
}

.site-footer {
  text-align: center;
  padding: 20px 0 50px;
  font-family: var(--font-chrome);
  font-size: 0.8rem;
  color: var(--chrome-text-light);
}

@media (prefers-reduced-motion: reduce) {
  .cursor, .character-img:hover {
    animation: none;
  }
}

@media (max-width: 820px) {
  .app-window {
    grid-template-columns: 1fr;
  }
  .menu-bar {
    padding-left: 24px;
    flex-wrap: wrap;
  }
  .sidebar {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    min-height: auto;
  }
  .character-dock {
    flex-direction: row;
    justify-content: center;
    position: static;
    min-height: auto;
    padding: 16px;
  }
  .doc-page {
    padding: 36px 24px 60px;
  }
}