:root {
  /* D2-B 麦穗浅金：蓝色建立结构，珊瑚橙提示行动，浅金只负责点亮。 */
  --bg-main: #fdfcf8;
  --bg-soft: #eaf4ff;
  --bg-card: #fffdfb;
  --bg-hover: #f3f8fd;
  --primary: #2d7fb8;
  --accent: #ff7f6a;
  --highlight: #e8cf72;
  --text-main: #243843;
  --text-muted: #4c6270;
  --line: #d9e7f2;
  --shadow-soft: 0 8px 24px rgba(45, 127, 184, 0.08);

  /* 兼容现有组件命名，避免改动窗口和白板交互选择器。 */
  --cream: var(--bg-main);
  --cream-light: var(--bg-card);
  --tide-mist: var(--bg-soft);
  --tide-deep: var(--primary);
  --title-deep: var(--primary);
  --pencil: var(--text-muted);
  --coral: var(--accent);
  --honey: var(--highlight);

  --color-canvas: var(--bg-main);
  --color-canvas-soft: var(--bg-soft);
  --color-paper: var(--bg-card);
  --color-paper-muted: var(--bg-hover);
  --color-text: var(--text-main);
  --color-title: var(--primary);
  --color-text-soft: var(--text-muted);
  --color-text-micro: #405866;
  --color-light: var(--highlight);
  --color-accent: var(--primary);
  --color-action: var(--accent);
  --color-line: var(--line);
  --color-line-strong: #b8d5e8;
  --color-error-bg: #fff0ed;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 72px;

  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-window: 0 24px 68px rgba(45, 127, 184, 0.14), 0 3px 12px rgba(45, 127, 184, 0.07);
  --shadow-card: var(--shadow-soft);
  --shadow-card-hover: 0 15px 36px rgba(45, 127, 184, 0.12);

  --font-sans: "Segoe UI", "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  --font-title: "Kaiti SC", "STKaiti", "KaiTi", "楷体", serif;
  --font-serif: Palatino, "Book Antiqua", "Noto Serif SC", "Songti SC", serif;
  --font-meta: Palatino, "Book Antiqua", Georgia, serif;
  --font-mono: Consolas, "Courier New", monospace;

  --transition-quick: 150ms ease;
  --transition-gentle: 230ms ease;

  --home-background-image: url("首页.png");
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  color-scheme: light;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--color-text);
  background: var(--color-canvas);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

button {
  color: inherit;
  font: inherit;
}

button:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--color-accent) 72%, transparent);
  outline-offset: 3px;
}

.page-section {
  display: none;
  min-height: 100vh;
  padding: var(--space-8) max(var(--space-6), 6vw) 112px;
}

.page-section.is-active {
  display: block;
}

.page-section[hidden] {
  display: none;
}

.section-header {
  max-width: 1080px;
  margin: 0 auto var(--space-7);
}

.section-header h1 {
  margin: 0;
  color: var(--color-title);
  font-family: var(--font-serif);
  font-size: clamp(34px, 5vw, 58px);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.section-header p {
  max-width: 560px;
  margin: var(--space-2) 0 0;
  color: var(--color-text-soft);
}

/* Home: an open desktop rather than a panel or card. */
.home-page {
  position: relative;
  height: 100vh;
  min-height: 480px;
  padding: 0;
  overflow: hidden;
  background: var(--color-canvas-soft);
}

.home-page.is-active {
  display: block;
}

.home-background {
  position: absolute;
  inset: 0;
  background-color: var(--color-canvas-soft);
  background-image: var(--home-background-image);
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

.home-background::before,
.home-background::after {
  display: none;
}

.home-ip-stage {
  position: absolute;
  z-index: 2;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.home-ip {
  position: absolute;
  pointer-events: none;
  cursor: grab;
  touch-action: none;
  user-select: none;
  filter: drop-shadow(0 14px 22px rgba(45, 127, 184, 0.1));
  transition: filter var(--transition-gentle), transform var(--transition-gentle);
}

.home-ip::before {
  content: "";
  position: absolute;
  inset: var(--home-ip-hitbox);
  pointer-events: auto;
  border-radius: 8px;
}

.home-ip:focus-visible {
  outline: none;
}

.home-ip:focus-visible::before {
  outline: 2px solid color-mix(in srgb, var(--color-accent) 72%, transparent);
  outline-offset: 4px;
}

.site-editor-active .home-ip[data-home-ip]::after {
  inset: var(--home-ip-hitbox);
}

.home-ip:hover,
.home-ip:focus-visible {
  filter: drop-shadow(0 17px 25px rgba(45, 127, 184, 0.16));
}

.home-ip.is-dragging {
  cursor: grabbing;
  filter: drop-shadow(0 20px 30px rgba(45, 127, 184, 0.2));
  transition: none;
}

.home-ip--person {
  --home-ip-hitbox: 7% 27% 11% 31%;
  top: 64%;
  left: 47%;
  width: clamp(210px, 19vw, 330px);
  transform: translate(-50%, -50%);
}

.home-ip img {
  display: block;
  width: 100%;
  height: auto;
  pointer-events: none;
}

.home-ip--spirit {
  --home-ip-hitbox: 21% 30% 22% 31%;
  top: 61%;
  left: 64%;
  width: clamp(72px, 7vw, 108px);
  transform: translate(-50%, -50%);
}

.home-shortcuts {
  position: absolute;
  z-index: 4;
  top: clamp(28px, 7vh, 72px);
  right: clamp(18px, 3vw, 42px);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.desktop-folder {
  --shortcut-color: var(--primary);
  touch-action: none;
  user-select: none;
  width: 92px;
  padding: 9px 5px 7px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--color-text-soft);
  background: transparent;
  cursor: pointer;
  transition: color var(--transition-quick), background-color var(--transition-quick), transform var(--transition-quick);
}

.desktop-folder:hover {
  color: var(--color-text);
  border-color: color-mix(in srgb, var(--shortcut-color) 42%, var(--color-line));
  background: rgba(255, 253, 251, 0.76);
  transform: translateY(-2px);
}

.desktop-folder:active {
  transform: translateY(0);
}

.desktop-folder.is-shortcut-dragging {
  cursor: grabbing;
  transform: none;
  transition: none;
  z-index: 2;
}

.desktop-app {
  text-align: center;
  text-decoration: none;
}

.desktop-app .shortcut-icon {
  width: 48px;
  height: 48px;
  object-fit: contain;
}

.desktop-app:focus-visible {
  outline: 2px solid var(--color-title);
  outline-offset: 3px;
}

.desktop-folder[aria-expanded="true"] {
  border-color: color-mix(in srgb, var(--shortcut-color) 54%, var(--color-line));
  color: var(--color-title);
  background: rgba(255, 253, 251, 0.9);
}

.desktop-folder:nth-child(2) {
  --shortcut-color: var(--accent);
}

.desktop-folder:nth-child(3) {
  --shortcut-color: var(--highlight);
}

.shortcut-icon {
  position: relative;
  display: block;
  width: 41px;
  height: 31px;
  margin: 0 auto 7px;
}

.shortcut-icon--folder {
  border: 1px solid color-mix(in srgb, var(--shortcut-color) 54%, var(--color-line));
  border-radius: 2px var(--radius-sm) var(--radius-sm) var(--radius-sm);
  background: color-mix(in srgb, var(--shortcut-color) 18%, var(--color-paper));
  box-shadow: 2px 3px 0 color-mix(in srgb, var(--shortcut-color) 10%, transparent);
  transform: rotate(-0.8deg);
}

.shortcut-icon--folder::before {
  position: absolute;
  top: -7px;
  left: -1px;
  width: 18px;
  height: 7px;
  border: 1px solid color-mix(in srgb, var(--shortcut-color) 54%, var(--color-line));
  border-bottom: 0;
  border-radius: 3px 3px 0 0;
  background: color-mix(in srgb, var(--shortcut-color) 18%, var(--color-paper));
  content: "";
}

.shortcut-icon--folder::after {
  position: absolute;
  right: 6px;
  bottom: 7px;
  left: 6px;
  height: 1px;
  background: color-mix(in srgb, var(--shortcut-color) 48%, var(--color-line));
  content: "";
  transform: rotate(1deg);
}

.shortcut-icon--markdown {
  border: 1px solid color-mix(in srgb, var(--shortcut-color) 48%, var(--color-line));
  border-radius: 3px 3px 5px 3px;
  background:
    linear-gradient(var(--shortcut-color), var(--shortcut-color)) 8px 10px / 21px 1px no-repeat,
    linear-gradient(var(--shortcut-color), var(--shortcut-color)) 8px 16px / 17px 1px no-repeat,
    linear-gradient(var(--shortcut-color), var(--shortcut-color)) 8px 22px / 22px 1px no-repeat,
    var(--color-paper);
  box-shadow: 2px 3px 0 color-mix(in srgb, var(--shortcut-color) 10%, transparent);
  transform: rotate(0.7deg);
}

.shortcut-icon--markdown::before {
  position: absolute;
  top: -1px;
  right: -1px;
  width: 9px;
  height: 9px;
  border-bottom: 1px solid color-mix(in srgb, var(--shortcut-color) 48%, var(--color-line));
  border-left: 1px solid color-mix(in srgb, var(--shortcut-color) 48%, var(--color-line));
  background: var(--color-paper);
  content: "";
}

.folder-label {
  display: block;
  color: var(--color-title);
  font-size: 12.5px;
  line-height: 1.45;
  letter-spacing: 0.03em;
}


/* Window geometry is intentionally retained for the existing drag and resize logic. */
.window-area {
  position: absolute;
  z-index: 3;
  inset: 0;
  pointer-events: none;
}

.content-window {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(560px, calc(100% - 48px));
  min-height: 260px;
  padding: 0 20px 20px;
  border: 1px solid var(--color-line);
  background: var(--color-paper);
  transform: translate(-50%, -50%);
  pointer-events: auto;
}

.window-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin: 0 -20px var(--space-5);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-line);
}

.window-header h2 {
  margin: 0;
  font-size: 18px;
}

.window-close {
  padding: 6px 10px;
  border: 1px solid var(--color-line-strong);
  background: transparent;
  cursor: pointer;
}

.paper-window {
  display: flex;
  flex-direction: column;
  width: min(720px, calc(100vw - 40px));
  height: clamp(280px, 68vh, 560px);
  max-height: calc(100vh - 96px);
  min-height: 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  color: var(--color-text);
  background: var(--color-paper);
  box-shadow: var(--shadow-window);
  opacity: 0;
  transform: translate(-50%, calc(-50% + 8px)) scale(0.99);
  transition: border-color var(--transition-quick), box-shadow var(--transition-quick);
}

.paper-window[hidden] {
  display: none;
}

.paper-window.is-open {
  opacity: 1;
  transform: translate(
    calc(-50% + var(--window-cascade-x, 0px)),
    calc(-50% + var(--window-cascade-y, 0px))
  ) scale(1);
}

.paper-window.is-open.has-normal-rect {
  transform: none;
}

.paper-window.is-open:not(.is-active-window) {
  border-color: color-mix(in srgb, var(--color-line) 78%, transparent);
  box-shadow: 0 12px 34px rgba(45, 127, 184, 0.08);
}

.paper-window.is-open:not(.is-active-window) .window-header h2 {
  color: var(--color-text-soft);
}

.paper-window.is-active-window {
  border-color: var(--color-line-strong);
  box-shadow: 0 20px 54px rgba(45, 127, 184, 0.15);
}

.paper-window .window-header {
  flex: 0 0 auto;
  margin: 0;
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-line);
  background: color-mix(in srgb, var(--cream-light) 84%, var(--tide-mist));
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.paper-window.is-dragging,
.paper-window.is-resizing {
  transition: none;
}

.paper-window.is-dragging .window-header {
  cursor: grabbing;
}

.window-resize-handle {
  position: absolute;
  z-index: 4;
  display: block;
  touch-action: none;
  user-select: none;
}

.window-resize-handle--n,
.window-resize-handle--s {
  right: 12px;
  left: 12px;
  height: 8px;
}

.window-resize-handle--n {
  top: 0;
  cursor: ns-resize;
}

.window-resize-handle--s {
  bottom: 0;
  cursor: ns-resize;
}

.window-resize-handle--e,
.window-resize-handle--w {
  top: 12px;
  bottom: 12px;
  width: 8px;
}

.window-resize-handle--e {
  right: 0;
  cursor: ew-resize;
}

.window-resize-handle--w {
  left: 0;
  cursor: ew-resize;
}

.window-resize-handle--ne,
.window-resize-handle--se,
.window-resize-handle--sw,
.window-resize-handle--nw {
  width: 14px;
  height: 14px;
}

.window-resize-handle--ne {
  top: 0;
  right: 0;
  cursor: nesw-resize;
}

.window-resize-handle--se {
  right: 0;
  bottom: 0;
  cursor: nwse-resize;
}

.window-resize-handle--sw {
  bottom: 0;
  left: 0;
  cursor: nesw-resize;
}

.window-resize-handle--nw {
  top: 0;
  left: 0;
  cursor: nwse-resize;
}

.paper-window .window-header h2 {
  color: var(--color-title);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.window-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  touch-action: auto;
}

.paper-window .window-open,
.paper-window .window-close {
  position: relative;
  display: grid;
  place-items: center;
  width: 30px;
  min-width: 30px;
  height: 30px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--color-text-soft);
  background: transparent;
  cursor: pointer;
  text-decoration: none;
  transition: color var(--transition-quick), border-color var(--transition-quick), background-color var(--transition-quick);
}

.paper-window .window-open {
  padding-bottom: 2px;
  font-family: var(--font-serif);
  font-size: 19px;
  line-height: 1;
}

.paper-window .window-close {
  font-size: 0;
}

.paper-window .window-close::before,
.paper-window .window-close::after {
  position: absolute;
  content: "";
}

.paper-window .window-close::before,
.paper-window .window-close::after {
  top: 14px;
  left: 8px;
  width: 14px;
  height: 1px;
  background: currentColor;
}

.paper-window .window-close::before {
  transform: rotate(45deg);
}

.paper-window .window-close::after {
  transform: rotate(-45deg);
}

.paper-window .window-open:hover,
.paper-window .window-close:hover,
.paper-window .window-open:focus-visible,
.paper-window .window-close:focus-visible {
  border-color: var(--color-line-strong);
  color: var(--color-text);
  background: var(--bg-hover);
}

.paper-window .window-close:hover,
.paper-window .window-close:focus-visible {
  color: var(--color-action);
}

.paper-window .window-body {
  flex: 1 1 auto;
  min-height: 0;
  padding: 30px 38px 40px;
  overflow-y: auto;
  line-height: 1.86;
  scrollbar-color: var(--color-line-strong) transparent;
  scrollbar-width: thin;
}

.paper-window .window-body::-webkit-scrollbar,
.about-board-nav::-webkit-scrollbar,
.about-node-scroll::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

.paper-window .window-body::-webkit-scrollbar-thumb,
.about-board-nav::-webkit-scrollbar-thumb,
.about-node-scroll::-webkit-scrollbar-thumb {
  border: 3px solid transparent;
  border-radius: 999px;
  background: var(--color-line-strong);
  background-clip: padding-box;
}

.paper-window .window-body::-webkit-scrollbar-track,
.about-board-nav::-webkit-scrollbar-track,
.about-node-scroll::-webkit-scrollbar-track {
  background: transparent;
}

.paper-window .window-body p {
  margin: 0 0 1.15em;
}

.paper-window .window-body p:last-child {
  margin-bottom: 0;
}

.content-status {
  margin: 0;
  padding: 14px 16px;
  border: 1px dashed var(--color-line-strong);
  border-radius: var(--radius-sm);
  color: var(--color-text-soft);
  background: var(--color-paper-muted);
}

.content-status.is-error {
  border-color: color-mix(in srgb, var(--color-action) 45%, var(--color-line));
  color: color-mix(in srgb, var(--color-action) 78%, var(--color-text));
  background: var(--color-error-bg);
}

.archive-status:not([hidden]),
.project-status:not([hidden]) {
  padding: 14px 16px;
  border: 1px dashed var(--color-line-strong);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--tide-mist) 20%, var(--color-paper));
}

.project-status.is-error {
  border-color: color-mix(in srgb, var(--color-action) 45%, var(--color-line));
  background: var(--color-error-bg);
}

.markdown-content {
  max-width: 68ch;
  margin: 0 auto;
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16.75px;
  overflow-wrap: anywhere;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3 {
  margin: 1.8em 0 0.7em;
  color: var(--color-title);
  font-family: var(--font-title);
  font-weight: 500;
  line-height: 1.35;
}

.markdown-content h1 {
  margin-top: 0;
  font-size: clamp(27px, 4vw, 32px);
  letter-spacing: 0.025em;
}

.markdown-content h1::after {
  display: block;
  width: 28px;
  height: 2px;
  margin-top: var(--space-3);
  background: var(--color-action);
  opacity: 0.72;
  content: "";
}

.markdown-content h2 {
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-line);
  font-size: 22px;
}

.markdown-content h3 {
  font-size: 18px;
}

.markdown-content p,
.markdown-content ul,
.markdown-content ol,
.markdown-content blockquote,
.markdown-content pre {
  margin: 0 0 1.2em;
}

.markdown-content ul,
.markdown-content ol {
  padding-left: 1.5em;
}

.markdown-content li + li {
  margin-top: var(--space-2);
}

.markdown-content li::marker {
  color: var(--color-action);
}

.markdown-content blockquote {
  padding: var(--space-1) 0 var(--space-1) var(--space-4);
  border-left: 2px solid var(--color-light);
  color: var(--color-text-soft);
}

.markdown-content blockquote p {
  margin: 0;
}

.markdown-content img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: var(--space-6) auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
}

.markdown-content a {
  color: var(--color-accent);
  text-decoration-color: color-mix(in srgb, var(--color-accent) 45%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.markdown-content a:hover {
  text-decoration-color: currentColor;
}

.markdown-content code {
  padding: 2px 5px;
  border: 1px solid var(--color-line);
  border-radius: 3px;
  background: var(--bg-hover);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.markdown-content pre {
  padding: var(--space-4);
  overflow-x: auto;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--tide-mist) 36%, var(--cream-light));
  color: var(--title-deep);
  line-height: 1.58;
}

.directory-content {
  max-width: 680px;
  margin: 0 auto;
}

.directory-description {
  max-width: 52ch;
  margin: 0 0 var(--space-6);
  color: var(--color-text-soft);
  font-size: 15px;
  line-height: 1.8;
}

.directory-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--color-line);
  list-style: none;
}

.directory-entry {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-4);
  min-height: 72px;
  padding: 10px 4px;
  border-bottom: 1px solid var(--color-line);
}

.directory-entry-main {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: var(--space-4);
  color: var(--color-text);
  text-decoration: none;
}

a.directory-entry-main:hover strong {
  color: var(--color-accent);
}

.directory-entry-main.is-unavailable {
  color: var(--color-text-soft);
}

.directory-entry-icon {
  position: relative;
  display: block;
  width: 32px;
  height: 38px;
  flex: 0 0 auto;
  border: 1px solid var(--color-line-strong);
  border-radius: 3px;
  background: var(--color-paper);
}

.directory-entry-icon::after {
  position: absolute;
  top: 10px;
  right: 7px;
  left: 7px;
  height: 10px;
  border-top: 1px solid var(--color-line-strong);
  border-bottom: 1px solid var(--color-line-strong);
  content: "";
}

.directory-entry-icon--external::before,
.directory-entry-icon--html::before,
.directory-entry-icon--internal::before {
  position: absolute;
  right: 5px;
  bottom: 4px;
  color: var(--color-action);
  font-family: var(--font-meta);
  font-size: 11px;
  content: "↗";
}

.directory-entry-text {
  display: grid;
  min-width: 0;
  gap: 2px;
}

.directory-entry-text strong {
  color: var(--color-title);
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 500;
  line-height: 1.35;
  transition: color var(--transition-quick);
}

.directory-entry-file {
  overflow: hidden;
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.directory-entry small {
  color: var(--color-text-soft);
  font-family: var(--font-meta);
  font-size: 11px;
  white-space: nowrap;
}

.directory-empty {
  margin: 0;
  padding: var(--space-6);
  border: 1px dashed var(--color-line-strong);
  border-radius: var(--radius-md);
  color: var(--color-text-soft);
  background: color-mix(in srgb, var(--tide-mist) 22%, transparent);
  text-align: center;
}

.markdown-content pre code {
  padding: 0;
  border: 0;
  color: inherit;
  background: transparent;
  font-size: 14px;
}

/* Archive: an editorial overview followed by direction-based entry cards. */
.archive-page {
  --archive-text-soft: var(--color-text-soft);
  background: var(--color-canvas);
}

.archive-content,
.archive-status {
  width: min(100%, 1120px);
  margin-right: auto;
  margin-left: auto;
}

.archive-status {
  margin-top: var(--space-7);
  color: var(--archive-text-soft);
  text-align: center;
}

.archive-status.is-error {
  max-width: 720px;
  padding: var(--space-4);
  border: 1px solid color-mix(in srgb, var(--color-action) 32%, var(--color-line));
  border-radius: var(--radius-sm);
  background: var(--color-error-bg);
  color: color-mix(in srgb, var(--color-action) 78%, var(--color-text));
  text-align: left;
}

.archive-hero {
  max-width: 920px;
  margin: clamp(24px, 4vh, 48px) auto clamp(88px, 11vw, 152px);
  text-align: center;
}

.archive-hero-eyebrow,
.archive-section-eyebrow,
.archive-group-eyebrow,
.archive-highlight-index {
  margin: 0;
  color: var(--color-accent);
  font-family: var(--font-meta);
  font-size: 13px;
  letter-spacing: 0.12em;
  line-height: 1.5;
}

.archive-highlight-index {
  color: color-mix(in srgb, var(--color-light) 78%, var(--color-title));
}

.archive-hero h1 {
  max-width: 880px;
  margin: var(--space-4) auto 0;
  color: var(--color-title);
  font-family: var(--font-title);
  font-size: clamp(38px, 5.1vw, 66px);
  font-weight: 500;
  letter-spacing: 0.015em;
  line-height: 1.24;
  text-wrap: balance;
}

.archive-hero-description {
  max-width: 660px;
  margin: var(--space-5) auto 0;
  color: var(--archive-text-soft);
  font-size: 16px;
  line-height: 1.85;
  text-wrap: balance;
}

.archive-section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.archive-section-heading h2 {
  margin: 0;
  color: var(--color-title);
  font-family: var(--font-title);
  font-size: clamp(27px, 3vw, 38px);
  font-weight: 500;
  line-height: 1.3;
}

.archive-highlights {
  margin-bottom: clamp(88px, 10vw, 136px);
}

.archive-highlights-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0 var(--space-6);
}

.archive-highlight {
  display: flex;
  min-height: 184px;
  flex-direction: column;
  padding: var(--space-5) 0 var(--space-7);
  border-top: 1px solid var(--color-line);
}

.archive-highlight.is-featured {
  grid-column: span 2;
  padding-right: clamp(24px, 5vw, 72px);
}

.archive-highlight h3 {
  max-width: 620px;
  margin: var(--space-4) 0 var(--space-3);
  color: var(--color-title);
  font-family: var(--font-title);
  font-size: clamp(20px, 2vw, 27px);
  font-weight: 500;
  line-height: 1.38;
}

.archive-highlight h3 a {
  color: inherit;
  text-decoration-color: color-mix(in srgb, var(--color-accent) 44%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
}

.archive-highlight h3 a:hover {
  color: var(--color-accent);
  text-decoration-color: currentColor;
}

.archive-highlight-note {
  max-width: 52ch;
  margin: 0;
  color: var(--archive-text-soft);
  font-size: 15px;
  line-height: 1.78;
}

.archive-groups {
  margin-bottom: var(--space-8);
}

.archive-groups-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-5);
}

.archive-group-card {
  display: flex;
  min-height: 300px;
  grid-column: span 5;
  flex-direction: column;
  padding: clamp(24px, 3vw, 38px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-paper) 88%, transparent);
  box-shadow: var(--shadow-soft);
  transition: border-color var(--transition-gentle), background-color var(--transition-gentle), box-shadow var(--transition-gentle), transform var(--transition-gentle);
}

.archive-group-card:nth-child(4n + 1),
.archive-group-card:nth-child(4n + 4) {
  grid-column: span 7;
}

.archive-group-card:hover {
  border-color: var(--color-line-strong);
  background: var(--color-paper);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.archive-group-eyebrow {
  color: var(--archive-text-soft);
}

.archive-group-card h3 {
  margin: var(--space-3) 0 0;
  color: var(--color-title);
  font-family: var(--font-title);
  font-size: clamp(23px, 2.4vw, 31px);
  font-weight: 500;
  line-height: 1.35;
}

.archive-group-summary {
  max-width: 48ch;
  margin: var(--space-3) 0 var(--space-6);
  color: var(--archive-text-soft);
  font-size: 15px;
  line-height: 1.78;
}

.archive-group-links {
  margin: auto 0 0;
  padding: 0;
  border-top: 1px solid var(--color-line);
  list-style: none;
}

.archive-group-links li {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px solid color-mix(in srgb, var(--color-line) 70%, transparent);
  font-size: 13px;
}

.archive-group-links a {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  color: var(--color-text);
  font-size: 14px;
  text-decoration: none;
}

.archive-group-links a:hover {
  color: var(--color-accent);
}

.archive-group-link-arrow {
  flex: 0 0 auto;
  color: var(--color-accent);
  font-size: 15px;
}

.archive-group-link-unavailable,
.archive-group-empty {
  color: var(--archive-text-soft);
}

.archive-group-links small {
  flex: 0 0 auto;
  color: var(--archive-text-soft);
  font-size: 12px;
}

.archive-footer-note {
  max-width: 620px;
  margin: 0 auto;
  color: var(--archive-text-soft);
  font-family: var(--font-title);
  font-size: 16px;
  line-height: 1.8;
  text-align: center;
}

/* Internal project pages reuse the same paper and reading system. */
.project-detail-page {
  min-height: 100vh;
  background: var(--color-canvas-soft);
}

.project-detail-shell {
  width: min(860px, calc(100% - 48px));
  margin: 0 auto;
  padding: var(--space-7) 0 var(--space-8);
  animation: document-enter 360ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.project-document > .project-markdown:not([hidden]),
.reading-article-header:not([hidden]),
.reading-layout:not([hidden]) {
  animation: document-content-enter 260ms ease-out;
}

@keyframes document-enter {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes document-content-enter {
  from { opacity: 0; }
  to { opacity: 1; }
}

.project-back {
  display: inline-block;
  margin-bottom: var(--space-5);
  color: var(--color-text-soft);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--transition-quick), transform var(--transition-quick);
}

.reading-site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.reading-site-header .project-back {
  margin-bottom: 0;
}

.reading-file-name {
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 12px;
}

.project-back:hover {
  color: var(--color-text);
  transform: translateX(-2px);
}

.project-document {
  padding: clamp(28px, 6vw, 64px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-paper);
  box-shadow: var(--shadow-card);
}

.project-status {
  margin: 0;
  color: var(--color-text-soft);
}

.project-status.is-error {
  color: color-mix(in srgb, var(--color-action) 78%, var(--color-text));
}

.project-markdown {
  max-width: 68ch;
  margin: 0 auto;
}

.reading-page .project-detail-shell {
  width: min(1120px, calc(100% - 48px));
}

.reading-page .project-document {
  padding: clamp(34px, 6vw, 72px);
}

.reading-article-header {
  max-width: 68ch;
  margin: 0 auto clamp(36px, 6vw, 64px);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-line);
}

.reading-kicker {
  margin: 0 0 var(--space-3);
  color: var(--color-accent);
  font-family: var(--font-meta);
  font-size: 12px;
  letter-spacing: 0.11em;
}

.reading-article-header h1 {
  margin: 0;
  color: var(--color-title);
  font-family: var(--font-title);
  font-size: clamp(36px, 5vw, 58px);
  font-weight: 500;
  line-height: 1.28;
}

.reading-summary {
  max-width: 58ch;
  margin: var(--space-5) 0 0;
  color: var(--color-text-soft);
  font-size: 17px;
  line-height: 1.85;
}

.reading-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
  margin: var(--space-5) 0 0;
  padding: 0;
  list-style: none;
}

.reading-meta li {
  display: flex;
  gap: 6px;
  align-items: baseline;
  color: var(--color-text-soft);
  font-family: var(--font-meta);
  font-size: 12px;
}

.reading-meta li span::after {
  content: " /";
}

.reading-meta strong {
  color: var(--color-text);
  font-weight: 400;
}

.reading-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  gap: clamp(28px, 5vw, 60px);
}

.reading-layout.has-toc {
  grid-template-columns: minmax(150px, 190px) minmax(0, 1fr);
}

.reading-toc {
  position: sticky;
  top: var(--space-5);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.reading-toc > p {
  margin: 0 0 var(--space-3);
  color: var(--color-accent);
  font-family: var(--font-meta);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.reading-toc ol {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.reading-toc li.is-subheading {
  padding-left: 12px;
}

.reading-toc a {
  display: block;
  color: var(--color-text-soft);
  font-size: 12px;
  line-height: 1.5;
  text-decoration: none;
}

.reading-toc a:hover {
  color: var(--color-accent);
}

.reading-layout .project-markdown {
  width: 100%;
}

/* About: an infinite-feeling, in-memory personal whiteboard. */
.about-page {
  position: relative;
  height: 100vh;
  min-height: 520px;
  padding: 0;
  overflow: hidden;
  background: var(--color-canvas-soft);
}

.about-page.is-active {
  display: block;
}

.about-board-viewport {
  --about-grid-size: 34px;
  --about-grid-x: 0px;
  --about-grid-y: 0px;
  --about-sidebar-width: 220px;
  position: absolute;
  inset: 0;
  overflow: hidden;
  background-color: var(--color-canvas-soft);
  background-image: radial-gradient(
    circle,
    rgba(45, 127, 184, 0.18) 0 0.9px,
    transparent 1.15px
  );
  background-position: var(--about-grid-x) var(--about-grid-y);
  background-size: var(--about-grid-size) var(--about-grid-size);
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.about-board-viewport.is-panning {
  cursor: grabbing;
}

.about-board-viewport.is-node-dragging {
  cursor: default;
}

.about-board-viewport.is-node-resizing {
  cursor: default;
}

.about-board-viewport.is-resizing-sidebar,
.about-board-viewport.is-resizing-sidebar * {
  cursor: col-resize !important;
}

.about-board-viewport:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--color-accent) 58%, transparent);
  outline-offset: -4px;
}

.about-board-heading {
  position: absolute;
  z-index: 65;
  top: 0;
  left: 0;
  display: flex;
  width: var(--about-sidebar-width);
  height: 64px;
  align-items: center;
  padding: 0 24px;
  border-right: 1px solid color-mix(in srgb, var(--color-line) 88%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--color-line) 88%, transparent);
  background: rgba(255, 253, 251, 0.94);
  pointer-events: none;
}

.about-board-eyebrow {
  margin: 0;
  color: var(--color-accent);
  font-family: var(--font-meta);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.about-board-heading.is-collapsed {
  width: 52px;
  justify-content: center;
  padding: 0 8px;
}

.about-board-heading.is-collapsed .about-board-eyebrow {
  font-size: 0;
}

.about-board-heading.is-collapsed .about-board-eyebrow::before {
  font-size: 11px;
  content: "A";
}

.about-board-controls {
  position: absolute;
  z-index: 50;
  top: var(--space-6);
  right: max(var(--space-6), 4vw);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  background: rgba(255, 253, 251, 0.92);
  box-shadow: var(--shadow-card);
}

.about-board-zoom {
  min-width: 42px;
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  text-align: center;
}

.about-board-reset {
  padding: 5px 9px;
  border: 0;
  border-radius: 999px;
  color: var(--color-text);
  background: transparent;
  font-size: 12px;
  cursor: pointer;
  transition: color var(--transition-quick), background-color var(--transition-quick);
}

.about-board-reset:hover {
  color: var(--color-accent);
  background: var(--color-paper-muted);
}

.about-board-reset:active,
.about-board-sidebar-header button:active,
.paper-window .window-open:active,
.paper-window .window-close:active {
  transform: translateY(1px);
}

.about-board-status {
  position: absolute;
  z-index: 35;
  top: 50%;
  left: 50%;
  max-width: min(420px, calc(100% - 48px));
  margin: 0;
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  color: var(--color-text-soft);
  background: var(--color-paper);
  box-shadow: var(--shadow-card);
  text-align: center;
  transform: translate(-50%, -50%);
}

.about-board-status.is-error {
  border-color: color-mix(in srgb, var(--color-action) 38%, var(--color-line));
  color: color-mix(in srgb, var(--color-action) 78%, var(--color-text));
  background: var(--color-error-bg);
}

.about-board-canvas {
  position: absolute;
  z-index: 1;
  top: 0;
  left: 0;
  width: 0;
  height: 0;
  overflow: visible;
  transform-origin: 0 0;
  will-change: transform;
}

.about-edge-layer {
  position: absolute;
  z-index: 0;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  overflow: visible;
  pointer-events: none;
}

.about-edge {
  fill: none;
  stroke-linecap: round;
  stroke-width: 1.25;
  vector-effect: non-scaling-stroke;
}

.about-edge--route {
  stroke: color-mix(in srgb, #315f7d 53%, transparent);
  stroke-width: 1.35;
}

.about-edge--association {
  stroke: color-mix(in srgb, #d9ae42 49%, transparent);
  stroke-width: 1.2;
}

.about-edge--reference {
  stroke: color-mix(in srgb, #8b989f 31%, transparent);
  stroke-dasharray: 3 7;
  stroke-width: 1.05;
}

.about-edge-layer marker path {
  fill: context-stroke;
}

.about-board-tools {
  position: absolute;
  z-index: 60;
  top: 64px;
  bottom: 0;
  left: 0;
  display: grid;
  width: var(--about-sidebar-width);
  min-height: 0;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 0;
  border-right: 1px solid color-mix(in srgb, var(--color-line) 88%, transparent);
  background: rgba(255, 253, 251, 0.94);
  cursor: default;
  touch-action: auto;
  user-select: none;
}

.about-board-sidebar {
  position: relative;
  display: flex;
  width: 100%;
  min-width: 0;
  min-height: 0;
  flex-direction: column;
  padding: 20px 20px 16px;
  overflow: hidden;
  border: 0;
  border-bottom: 1px solid color-mix(in srgb, var(--color-line) 88%, transparent);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  transition: width var(--transition-quick), padding var(--transition-quick);
}

.about-sidebar-resize-handle {
  position: absolute;
  z-index: 4;
  top: 0;
  right: -6px;
  bottom: 0;
  width: 12px;
  cursor: col-resize;
  touch-action: none;
}

.about-sidebar-resize-handle::after {
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 5px;
  width: 1px;
  background: transparent;
  content: "";
  transition: background-color var(--transition-quick), box-shadow var(--transition-quick);
}

.about-sidebar-resize-handle:hover::after,
.about-sidebar-resize-handle:focus-visible::after,
.about-board-viewport.is-resizing-sidebar .about-sidebar-resize-handle::after {
  background: color-mix(in srgb, var(--tide-deep) 40%, var(--color-line));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--tide-mist) 42%, transparent);
}

.about-board-sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: 0 0 var(--space-3);
  border-bottom: 1px solid color-mix(in srgb, var(--color-line) 74%, transparent);
}

.about-board-sidebar-header p,
.about-board-minimap > p {
  margin: 0;
  color: var(--color-text-soft);
  font-family: var(--font-meta);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.about-board-sidebar-header button {
  padding: 3px 5px;
  border: 0;
  border-radius: 999px;
  color: var(--color-text-soft);
  background: transparent;
  font-size: 10px;
  cursor: pointer;
}

.about-board-sidebar-header button:hover {
  color: var(--color-accent);
  background: var(--color-paper-muted);
}

.about-board-nav {
  min-height: 0;
  padding-top: var(--space-3);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-color: var(--color-line-strong) transparent;
  scrollbar-width: thin;
}

.about-board-nav-group + .about-board-nav-group {
  margin-top: var(--space-4);
}

.about-board-nav-group h2 {
  margin: 0 0 4px;
  padding: 0 var(--space-2) 2px;
  color: var(--color-text-soft);
  font-family: var(--font-title);
  font-size: 13px;
  font-weight: 500;
}

.about-board-nav-list {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.about-board-nav-list button {
  position: relative;
  width: 100%;
  padding: 8px 10px 8px 20px;
  border: 0;
  border-radius: var(--radius-sm);
  color: var(--color-text-soft);
  background: transparent;
  font-size: 13px;
  line-height: 1.35;
  text-align: left;
  cursor: pointer;
}

.about-board-nav-list button::before {
  position: absolute;
  top: 50%;
  left: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-line-strong);
  content: "";
  transform: translateY(-50%);
}

.about-board-nav-list button:hover,
.about-board-nav-list button.is-active {
  color: var(--color-text);
  background: color-mix(in srgb, var(--color-paper-muted) 76%, transparent);
}

.about-board-nav-list button.is-active::before {
  background: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 11%, transparent);
}

.about-board-sidebar.is-collapsed {
  width: 100%;
  min-height: 0;
  align-self: stretch;
  padding: 8px 6px;
}

.about-board-sidebar.is-collapsed .about-board-sidebar-header {
  padding: 0;
  border-bottom: 0;
}

.about-board-sidebar.is-collapsed .about-board-sidebar-header p,
.about-board-sidebar.is-collapsed .about-board-nav {
  display: none;
}

.about-board-sidebar.is-collapsed .about-board-sidebar-header button {
  width: 100%;
  padding: 7px 2px;
}

.about-board-minimap {
  position: relative;
  width: 100%;
  padding: 16px 20px 22px;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  cursor: crosshair;
  touch-action: manipulation;
  user-select: none;
}

.about-board-minimap:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--color-accent) 45%, transparent);
  outline-offset: 3px;
}

.about-board-minimap svg {
  display: block;
  width: 100%;
  height: 118px;
  margin-top: 10px;
  overflow: hidden;
  border: 1px dashed color-mix(in srgb, var(--color-line-strong) 74%, transparent);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-paper-muted) 70%, transparent);
}

.about-board-tools.is-collapsed {
  width: 52px;
  grid-template-rows: minmax(0, 1fr);
}

.about-board-tools.is-collapsed .about-sidebar-resize-handle {
  display: none;
}

.about-board-tools.is-collapsed .about-board-minimap {
  display: none;
}

.about-minimap-node {
  fill: color-mix(in srgb, var(--color-text-soft) 25%, var(--color-paper));
  stroke: color-mix(in srgb, var(--color-text-soft) 42%, transparent);
  stroke-width: 0.9;
  vector-effect: non-scaling-stroke;
}

.about-minimap-node.is-hero {
  fill: color-mix(in srgb, var(--color-light) 56%, var(--color-paper));
}

.about-minimap-node.is-selected {
  fill: color-mix(in srgb, var(--color-accent) 33%, var(--color-paper));
}

.about-minimap-viewport {
  fill: color-mix(in srgb, var(--color-accent) 4%, transparent);
  stroke: color-mix(in srgb, var(--color-accent) 72%, var(--color-text));
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
}

.about-node {
  position: absolute;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--color-line-strong) 70%, var(--color-line));
  border-radius: 9px;
  color: var(--color-text);
  background: color-mix(in srgb, var(--color-paper) 96%, #fff8e9);
  box-shadow: 0 8px 22px rgba(36, 56, 67, 0.08), 0 1px 2px rgba(36, 56, 67, 0.06);
  cursor: grab;
  touch-action: none;
  user-select: none;
  transition: border-color var(--transition-quick), box-shadow var(--transition-quick), scale var(--transition-quick);
}

.about-node:hover {
  border-color: color-mix(in srgb, var(--color-line-strong) 90%, var(--color-line));
  box-shadow: 0 12px 30px rgba(36, 56, 67, 0.11), 0 1px 3px rgba(36, 56, 67, 0.08);
}

.about-page.is-entering .about-node:not(.is-located) {
  animation: about-node-enter 540ms cubic-bezier(0.22, 0.72, 0.26, 1) both;
  animation-delay: calc(var(--about-enter-index, 0) * 75ms);
}

@keyframes about-node-enter {
  0% {
    opacity: 0;
    translate: 0 18px;
  }

  68% {
    opacity: 1;
  }

  100% {
    opacity: 1;
    translate: 0 0;
  }
}

.about-node-content {
  width: 100%;
  height: 100%;
  padding: 22px 24px;
  overflow: auto;
  scrollbar-color: color-mix(in srgb, var(--color-line-strong) 72%, transparent) transparent;
  scrollbar-width: thin;
}

.about-node-eyebrow {
  margin: 0 0 var(--space-2);
  color: var(--color-accent);
  font-family: var(--font-meta);
  font-size: 12px;
  letter-spacing: 0.09em;
}

.about-node h2 {
  margin: 0 0 var(--space-3);
  color: var(--color-title);
  font-family: var(--font-title);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.35;
}

.about-node-text {
  margin: 0;
  color: var(--color-text-soft);
  font-size: 15px;
  line-height: 1.72;
  white-space: pre-line;
}

.about-node.is-selected {
  border-color: color-mix(in srgb, var(--color-action) 48%, var(--color-line));
  box-shadow: 0 12px 34px rgba(45, 127, 184, 0.13);
}

.about-node.is-located {
  animation: about-node-located 900ms ease-out;
}

@keyframes about-node-located {
  0%, 100% {
    box-shadow: var(--shadow-card);
  }

  36% {
    border-color: color-mix(in srgb, var(--color-light) 78%, var(--color-accent));
    box-shadow: 0 0 0 7px color-mix(in srgb, var(--color-light) 16%, transparent), var(--shadow-card);
  }
}

.about-node.is-dragging {
  z-index: 10000 !important;
  border-color: var(--color-line-strong);
  box-shadow: 0 20px 48px rgba(45, 127, 184, 0.17);
  cursor: grabbing;
  scale: 1.018;
  transition: none;
}

.about-node.is-resizing {
  z-index: 10000 !important;
  border-color: color-mix(in srgb, var(--color-accent) 52%, var(--color-line));
  box-shadow: 0 16px 38px rgba(45, 127, 184, 0.14);
  transition: none;
}

.about-node.is-editing {
  z-index: 10001 !important;
  overflow: auto;
  border-color: color-mix(in srgb, var(--color-accent) 55%, var(--color-line));
  cursor: text;
  touch-action: auto;
  user-select: text;
}

.about-node [data-edit-field] {
  border-radius: 3px;
}

.about-node .is-editing-field {
  outline: 1px dashed color-mix(in srgb, var(--color-accent) 48%, transparent);
  outline-offset: 3px;
  cursor: text;
  user-select: text;
  white-space: pre-wrap;
}

.about-node--tiny {
  background: var(--color-paper-muted);
}

.about-node--small {
  background: color-mix(in srgb, var(--color-paper) 84%, var(--color-paper-muted));
}

.about-node--medium:nth-of-type(even) {
  background: color-mix(in srgb, var(--color-paper) 88%, var(--color-paper-muted));
}

.about-node--wide {
  border-color: color-mix(in srgb, var(--color-accent) 24%, var(--color-line));
  background: color-mix(in srgb, var(--color-paper) 82%, var(--color-error-bg));
}

.about-node--portrait {
  border-color: color-mix(in srgb, var(--color-light) 45%, var(--color-line));
}

.about-node--hero {
  border-color: color-mix(in srgb, var(--color-light) 62%, var(--color-line));
  box-shadow: 0 18px 46px rgba(45, 127, 184, 0.11);
}

.about-node--hero::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 4px;
  background: var(--color-light);
  content: "";
}

.about-node--hero h2 {
  font-size: 32px;
}

.about-node--core {
  border-color: color-mix(in srgb, var(--color-light) 62%, var(--color-line));
  box-shadow: 0 18px 46px rgba(45, 127, 184, 0.11);
}

.about-node--core::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 4px;
  background: var(--color-light);
  content: "";
}

.about-node--core h2 {
  font-size: 34px;
}

.about-node--note {
  background: var(--color-paper-muted);
}

.about-node--quiet {
  border-style: dashed;
  background: color-mix(in srgb, var(--color-paper) 72%, transparent);
}

.about-node--paper {
  background: var(--color-paper);
}

.about-node--links {
  border-color: color-mix(in srgb, var(--color-accent) 24%, var(--color-line));
  background: color-mix(in srgb, var(--color-paper) 82%, var(--color-error-bg));
}

.about-node-actions {
  position: absolute;
  z-index: 8;
  top: 8px;
  right: 8px;
  display: flex;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-2px);
  transition: opacity var(--transition-quick), transform var(--transition-quick);
}

.about-node:hover .about-node-actions,
.about-node.is-selected .about-node-actions,
.about-node:focus-within .about-node-actions,
.about-node.is-resizing .about-node-actions {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.about-node-delete {
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  padding: 0 0 2px;
  border: 1px solid color-mix(in srgb, var(--color-line-strong) 72%, var(--color-line));
  border-radius: 7px;
  color: var(--color-text-soft);
  background: color-mix(in srgb, var(--color-paper) 92%, transparent);
  box-shadow: 0 3px 10px rgba(36, 56, 67, 0.08);
  font-family: var(--font-meta);
  font-size: 17px;
  line-height: 1;
  cursor: pointer;
}

.about-node-delete:hover {
  border-color: color-mix(in srgb, var(--color-action) 40%, var(--color-line));
  color: var(--color-action);
  background: var(--color-error-bg);
}

.about-node-resize {
  position: absolute;
  z-index: 7;
  display: block;
  opacity: 0;
  transition: opacity var(--transition-quick), background-color var(--transition-quick);
}

.about-node:hover .about-node-resize,
.about-node.is-selected .about-node-resize,
.about-node.is-resizing .about-node-resize {
  opacity: 1;
}

.about-node-resize::after {
  position: absolute;
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-accent) 56%, var(--color-line-strong));
  content: "";
}

.about-node-resize--n,
.about-node-resize--s {
  right: 16px;
  left: 16px;
  height: 10px;
  cursor: ns-resize;
}

.about-node-resize--n { top: 0; }
.about-node-resize--s { bottom: 0; }

.about-node-resize--n::after,
.about-node-resize--s::after {
  right: 42%;
  left: 42%;
  height: 2px;
}

.about-node-resize--n::after { top: 1px; }
.about-node-resize--s::after { bottom: 1px; }

.about-node-resize--e,
.about-node-resize--w {
  top: 16px;
  bottom: 16px;
  width: 10px;
  cursor: ew-resize;
}

.about-node-resize--e { right: 0; }
.about-node-resize--w { left: 0; }

.about-node-resize--e::after,
.about-node-resize--w::after {
  top: 42%;
  bottom: 42%;
  width: 2px;
}

.about-node-resize--e::after { right: 1px; }
.about-node-resize--w::after { left: 1px; }

.about-node-resize--ne,
.about-node-resize--se,
.about-node-resize--sw,
.about-node-resize--nw {
  width: 16px;
  height: 16px;
}

.about-node-resize--ne { top: 0; right: 0; cursor: nesw-resize; }
.about-node-resize--se { right: 0; bottom: 0; cursor: nwse-resize; }
.about-node-resize--sw { bottom: 0; left: 0; cursor: nesw-resize; }
.about-node-resize--nw { top: 0; left: 0; cursor: nwse-resize; }

.about-node-resize--ne::after,
.about-node-resize--se::after,
.about-node-resize--sw::after,
.about-node-resize--nw::after {
  width: 7px;
  height: 7px;
  border: 1.5px solid color-mix(in srgb, var(--color-accent) 62%, var(--color-line-strong));
  background: var(--color-paper);
}

.about-node-resize--ne::after { top: 2px; right: 2px; }
.about-node-resize--se::after { right: 2px; bottom: 2px; }
.about-node-resize--sw::after { bottom: 2px; left: 2px; }
.about-node-resize--nw::after { top: 2px; left: 2px; }

.about-node[data-card-type="core"] {
  border-color: color-mix(in srgb, #315f7d 34%, var(--color-line));
  background: linear-gradient(135deg, #fffdfa 0%, #f4f8fa 100%);
  box-shadow: 0 20px 48px rgba(49, 95, 125, 0.13), 0 2px 3px rgba(36, 56, 67, 0.05);
}

.about-node[data-card-type="core"]::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 5px;
  background: #315f7d;
  content: "";
}

.about-node[data-card-type="core"] .about-node-content {
  display: grid;
  align-content: start;
  padding: 30px 34px 30px 38px;
}

.about-node[data-card-type="core"] h2 {
  max-width: 82%;
  font-size: clamp(30px, 2.3vw, 40px);
}

.about-node-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 0 0 14px;
}

.about-node-meta-row {
  display: grid;
  gap: 3px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid color-mix(in srgb, var(--color-line) 72%, transparent);
}

.about-node-meta .about-node-meta-row {
  margin: 0;
  padding: 8px 10px;
  border: 0;
  border-radius: 6px;
  background: color-mix(in srgb, #eaf4ff 54%, transparent);
}

.about-node-meta-row > span {
  color: var(--color-text-soft);
  font-family: var(--font-meta);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.about-node-meta-row > p {
  margin: 0;
  color: var(--color-text);
  font-size: 12px;
  line-height: 1.5;
}

.about-node[data-card-type="growth"] {
  border-left: 3px solid color-mix(in srgb, #315f7d 62%, var(--color-line));
  background: #fffdfa;
}

.about-node[data-card-type="growth"] .about-node-eyebrow {
  color: #315f7d;
}

.about-node[data-card-type="project"] {
  border-color: color-mix(in srgb, #7b8d73 40%, var(--color-line));
  background: color-mix(in srgb, #f4f7ef 58%, var(--color-paper));
}

.about-node-banner {
  margin: -22px -24px 18px;
  padding: 16px 24px;
  color: #fdfcf8;
  background: #3f6172;
  font-family: var(--font-title);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.about-node-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
}

.about-node-tags li {
  padding: 3px 7px;
  border: 1px solid color-mix(in srgb, #7b8d73 33%, var(--color-line));
  border-radius: 999px;
  color: color-mix(in srgb, #4f6350 84%, var(--color-text));
  background: color-mix(in srgb, #edf2e8 68%, var(--color-paper));
  font-family: var(--font-meta);
  font-size: 10px;
}

.about-node-project-link {
  position: absolute;
  right: 22px;
  bottom: 18px;
  color: #315f7d;
  font-family: var(--font-meta);
  font-size: 11px;
  text-decoration: none;
}

.about-node-project-link:hover { text-decoration: underline; }

.about-node[data-card-type="note"] {
  border-style: dashed;
  background: #fff9dc;
  box-shadow: 0 7px 16px rgba(104, 83, 35, 0.09);
  rotate: -0.7deg;
}

.about-node[data-card-type="note"]:nth-of-type(even) { rotate: 0.55deg; }

.about-node[data-card-type="note"] h2 { font-size: 18px; }

.about-node[data-card-type="note"] .about-node-text {
  font-family: var(--font-serif);
  font-size: 14px;
}

.about-node[data-card-type="image"] {
  padding: 10px 10px 0;
  border-color: color-mix(in srgb, #9c8e7a 38%, var(--color-line));
  background: #fffdf8;
  box-shadow: 0 13px 26px rgba(70, 62, 50, 0.12);
  rotate: 0.45deg;
}

.about-node[data-card-type="image"] .about-node-figure { background: #f3efe7; }

.about-node[data-card-type="image"] .about-node-figure figcaption {
  border-top: 0;
  background: #fffdf8;
  text-align: left;
}

.about-node[data-card-type="lighthouse"] {
  border-color: color-mix(in srgb, #d3a936 60%, var(--color-line));
  color: #fffdf8;
  background: #344f60;
  box-shadow: 0 17px 34px rgba(40, 68, 84, 0.18);
}

.about-node[data-card-type="lighthouse"] h2,
.about-node[data-card-type="lighthouse"] .about-node-text { color: #fffdf8; }

.about-node[data-card-type="lighthouse"] .about-node-eyebrow { color: #ecd176; }

.about-node[data-card-type="links"] {
  border-color: color-mix(in srgb, #d9ae42 40%, var(--color-line));
  background: color-mix(in srgb, #fff8e6 64%, var(--color-paper));
}

.about-node[data-node-type="markdown"] .about-node-content {
  display: flex;
  min-height: 0;
  flex-direction: column;
}

.about-node-scroll {
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-color: var(--color-line-strong) transparent;
  scrollbar-width: thin;
}

.about-node-markdown {
  max-width: none;
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
}

.about-node-markdown p,
.about-node-markdown ul,
.about-node-markdown blockquote {
  margin-bottom: 1em;
}

.about-node-markdown blockquote {
  font-size: 13px;
}

.about-node-figure {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  width: 100%;
  height: 100%;
  margin: 0;
  background: var(--color-paper-muted);
}

.about-node-figure img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 0;
  object-fit: cover;
  object-position: center 32%;
  pointer-events: none;
  user-select: none;
  -webkit-user-drag: none;
}

.about-node-figure figcaption {
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--color-line);
  color: var(--color-text-soft);
  background: var(--color-paper);
  font-family: var(--font-serif);
  font-size: 12px;
  text-align: center;
}

.about-node-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.about-node-links a,
.about-node-links .is-unavailable {
  display: block;
  padding: 8px 9px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  background: color-mix(in srgb, var(--color-paper) 86%, var(--bg-soft));
  font-size: 12px;
  text-align: center;
  text-decoration: none;
  transition: border-color var(--transition-quick), transform var(--transition-quick);
}

.about-node-links a:hover {
  border-color: var(--color-line-strong);
  transform: translateX(2px);
}

.about-node-links .is-unavailable {
  color: var(--color-text-soft);
}

.about-node-local-status {
  margin: 0;
  padding: var(--space-3);
  border: 1px dashed var(--color-line);
  border-radius: var(--radius-sm);
  color: var(--color-text-soft);
  background: var(--color-paper-muted);
  font-size: 13px;
}

.about-node-local-status.is-error,
.about-node--error {
  border-color: color-mix(in srgb, var(--color-action) 38%, var(--color-line));
  color: color-mix(in srgb, var(--color-action) 78%, var(--color-text));
  background: var(--color-error-bg);
}

.about-node--error {
  padding: var(--space-5);
}

.about-node--error h2 {
  font-size: 18px;
}

.about-node--error p {
  margin: 0;
  font-size: 13px;
}

/* 底部页面切换：只保留居中的按钮，不再铺设整条底栏。 */
.page-navigation {
  --nav-gap: clamp(18px, 4vw, 52px);
  position: fixed;
  z-index: 1000;
  bottom: 12px;
  left: 50%;
  display: flex;
  width: max-content;
  max-width: calc(100vw - 20px);
  justify-content: center;
  gap: var(--nav-gap);
  transform: translateX(-50%);
}

.nav-button {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  border: 1px solid color-mix(in srgb, var(--color-line-strong) 68%, transparent);
  border-radius: 999px;
  color: color-mix(in srgb, var(--color-text) 82%, var(--color-text-soft));
  background: rgba(255, 253, 251, 0.88);
  box-shadow: 0 2px 8px rgba(45, 127, 184, 0.08);
  font-family: var(--font-meta);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.035em;
  cursor: pointer;
  transition: color var(--transition-quick), border-color var(--transition-quick), background-color var(--transition-quick), box-shadow var(--transition-quick), transform var(--transition-quick);
}

.nav-button + .nav-button::before {
  position: absolute;
  top: 50%;
  right: 100%;
  width: var(--nav-gap);
  height: 1px;
  background: color-mix(in srgb, var(--color-line-strong) 76%, transparent);
  content: "";
  pointer-events: none;
  transform: translateY(-50%);
}

.nav-button span {
  width: 7px;
  height: 7px;
  border: 1px solid var(--pencil);
  border-radius: 50%;
  background: transparent;
  transition: border-color var(--transition-quick), background-color var(--transition-quick);
}

.nav-button:hover {
  color: var(--primary);
  border-color: color-mix(in srgb, var(--color-accent) 46%, var(--color-line));
  background: rgba(243, 248, 253, 0.96);
  box-shadow: 0 3px 10px rgba(45, 127, 184, 0.11);
}

.nav-button:active {
  transform: translateY(1px);
}

.nav-button.is-active {
  color: var(--primary);
  border-color: color-mix(in srgb, var(--coral) 48%, var(--color-line-strong));
  background: rgba(255, 253, 251, 0.98);
}

.nav-button.is-active span {
  border-color: var(--coral);
  background: var(--coral);
}

@media (max-width: 1100px) {
  .page-section:not(.home-page):not(.about-page) {
    padding-right: clamp(24px, 5vw, 48px);
    padding-left: clamp(24px, 5vw, 48px);
  }

  .home-shortcuts {
    right: 18px;
  }

  .about-board-controls {
    top: var(--space-4);
    right: var(--space-4);
  }

  .archive-highlights-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .archive-group-card,
  .archive-group-card:nth-child(4n + 1),
  .archive-group-card:nth-child(4n + 4) {
    grid-column: span 6;
  }

  .reading-layout.has-toc {
    grid-template-columns: minmax(132px, 160px) minmax(0, 1fr);
    gap: var(--space-6);
  }
}

@media (max-width: 700px) {
  .page-section {
    padding: var(--space-7) var(--space-5) 104px;
  }

  .home-page {
    padding: 0;
  }

  .about-page {
    padding: 0;
  }

  .about-board-heading {
    top: 0;
    left: 0;
    width: 220px;
    height: 58px;
    padding: 0 16px;
  }

  .about-board-heading.is-collapsed {
    width: 48px;
    padding: 0 6px;
  }

  .about-board-controls {
    top: var(--space-4);
    right: var(--space-4);
  }

  .about-board-tools {
    top: 58px;
    bottom: 0;
    left: 0;
    width: min(220px, calc(100% - 48px));
  }

  .about-sidebar-resize-handle {
    display: none;
  }

  .about-board-sidebar.is-collapsed {
    width: 100%;
  }

  .about-board-tools.is-collapsed {
    width: 48px;
  }

  .about-board-minimap {
    width: 100%;
    padding-bottom: 82px;
  }

  .about-board-minimap svg {
    height: 84px;
  }

  .about-board-zoom {
    display: none;
  }

  .home-shortcuts {
    top: var(--space-5);
    right: var(--space-3);
    display: grid;
    grid-template-columns: repeat(2, 76px);
    gap: 7px;
  }

  .desktop-folder {
    width: 76px;
    padding: 6px 3px;
  }


  .home-ip--person {
    top: 70%;
    left: 42%;
    width: clamp(190px, 58vw, 270px);
  }

  .home-ip--spirit {
    top: 61%;
    left: 73%;
    width: clamp(64px, 19vw, 90px);
  }

  .archive-hero {
    margin-top: var(--space-4);
    margin-bottom: var(--space-8);
    text-align: left;
  }

  .archive-hero h1,
  .archive-hero-description {
    margin-right: 0;
    margin-left: 0;
    text-wrap: wrap;
  }

  .archive-hero h1 {
    font-size: clamp(34px, 11vw, 48px);
  }

  .archive-section-heading {
    display: block;
    margin-bottom: var(--space-5);
  }

  .archive-section-heading h2 {
    margin-top: var(--space-2);
  }

  .archive-highlights-grid {
    grid-template-columns: 1fr;
  }

  .archive-highlight,
  .archive-highlight.is-featured {
    min-height: 0;
    grid-column: span 1;
    padding: var(--space-5) 0 var(--space-6);
  }

  .archive-groups-grid {
    display: block;
  }

  .archive-group-card,
  .archive-group-card:nth-child(4n + 1),
  .archive-group-card:nth-child(4n + 4) {
    min-height: 0;
    margin-bottom: var(--space-4);
    padding: var(--space-5);
  }

  .archive-footer-note {
    text-align: left;
  }

  .project-detail-shell {
    width: min(100% - 32px, 860px);
    padding-top: var(--space-6);
  }

  .project-document {
    padding: var(--space-5);
  }

  .reading-page .project-document {
    padding: var(--space-6) var(--space-5);
  }

  .reading-layout.has-toc {
    grid-template-columns: 1fr;
  }

  .reading-toc {
    position: static;
  }

  .page-navigation {
    --nav-gap: 6px;
    bottom: 8px;
  }

  .paper-window .window-body {
    padding: var(--space-5) 20px 30px;
  }

  .markdown-content {
    font-size: 16px;
  }

  .directory-entry {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .directory-entry small {
    padding-left: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto !important;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation: none !important;
    transition-duration: 0.01ms !important;
  }
}