:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --ink: #1d2733;
  --muted: #667085;
  --line: #dde3ea;
  --primary: #1677ff;
  --primary-dark: #0958d9;
  --danger: #d92d20;
  --surface: #ffffff;
  --front-bg: #f7f3eb;
  --front-surface: #fffaf2;
  --front-surface-soft: #efe6d8;
  --front-surface-active: #e2d5c2;
  --front-ink: #2f271f;
  --front-muted: #6f6257;
  --front-subtle: #8a7a69;
  --front-accent: #a66a2f;
  --front-accent-soft: #c6ad8f;
  --front-line: rgba(47, 39, 31, 0.10);
  --front-line-strong: rgba(47, 39, 31, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.front-home {
  background: var(--front-bg);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(247, 243, 235, 0.92);
  border-bottom: 1px solid var(--front-line);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
}

.brand-icon {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(47, 39, 31, 0.16);
}

.site-header nav,
.admin-nav nav {
  display: flex;
  gap: 18px;
}

.front-home .site-header nav {
  color: #6f6257;
  font-size: 14px;
}

.profile-hero {
  display: grid;
  place-items: center;
  padding: 72px clamp(20px, 6vw, 96px) 58px;
}

.profile-card {
  display: grid;
  justify-items: center;
  gap: 22px;
  width: min(760px, 100%);
  padding: 44px 28px;
  color: #2f271f;
  text-align: center;
}

.avatar {
  width: 126px;
  height: 126px;
  object-fit: cover;
  border: 6px solid #fff;
  border-radius: 50%;
  box-shadow: 0 18px 40px rgba(69, 52, 36, 0.16);
}

.text-avatar {
  display: grid;
  place-items: center;
  padding: 12px;
  color: #fff;
  background: #2f271f;
  font-weight: 800;
}

.profile-copy {
  display: grid;
  justify-items: center;
  gap: 12px;
}

.eyebrow {
  color: #a66a2f;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.location,
.hello {
  margin: 0;
  color: #7a6c60;
  font-size: 15px;
}

.profile-hero h1 {
  margin: 0;
  font-size: 34px;
  line-height: 1.2;
}

.profile-hero p,
.section p {
  max-width: 760px;
  color: inherit;
  font-size: 18px;
  line-height: 1.8;
}

.profile-hero .profile-copy > p:last-of-type {
  margin: 0;
  color: #5f554c;
}

.profile-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 10px;
}

.section {
  padding: 64px clamp(20px, 6vw, 96px);
  background: #fffaf2;
  border-top: 1px solid rgba(47, 39, 31, 0.10);
}

.section h2 {
  margin: 0;
  font-size: 32px;
}

.section-heading {
  display: grid;
  gap: 8px;
  margin-bottom: 22px;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
}

.about-section,
.split-section {
  background: #f7f3eb;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 28px;
  align-items: start;
}

.about-grid dl {
  display: grid;
  gap: 14px;
  margin: 0;
}

.about-grid dl div,
.project-grid article {
  padding: 22px;
  background: #ffffff;
  border: 1px solid rgba(47, 39, 31, 0.10);
  border-radius: 8px;
}

.about-grid dt {
  color: #a66a2f;
  font-weight: 800;
}

.about-grid dd {
  margin: 6px 0 0;
  color: var(--muted);
}

.project-section {
  background: #fffaf2;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.project-grid article {
  display: grid;
  gap: 12px;
  min-height: 230px;
}

.project-grid article > span {
  color: #c6ad8f;
  font-size: 36px;
  font-weight: 800;
}

.project-grid h3 {
  margin: 0;
  font-size: 22px;
}

.project-grid p {
  margin: 0;
  color: #6f6257;
  font-size: 16px;
}

.project-grid a {
  align-self: end;
  color: #a66a2f;
  font-weight: 800;
}

.contact-grid,
.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.contact-grid div,
.stats div,
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
}

.contact-grid strong,
.contact-grid span,
.stats strong,
.stats span {
  display: block;
}

.contact-grid span,
.stats span,
.hint {
  margin-top: 6px;
  color: var(--muted);
}

.site-footer {
  padding: 24px;
  color: var(--muted);
  text-align: center;
}

.front-subpage {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  min-height: 100vh;
  background: var(--front-bg);
  transition: grid-template-columns 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.subpage-sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 22px 14px;
  background: var(--front-surface-soft);
  border-right: 1px solid var(--front-line);
  overflow: hidden;
  transition: padding 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.subpage-sidebar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 0 6px 28px;
  transition: margin 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.subpage-back {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 6px 12px;
  color: var(--front-accent);
  background: none;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.15s, opacity 0.25s, visibility 0.25s;
}

.subpage-back:hover {
  background: rgba(0, 0, 0, 0.04);
}

.subpage-sidebar-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  min-width: 38px;
  height: 38px;
  padding: 0;
  color: #57534e;
  background: transparent;
  border: 1px solid var(--front-line-strong);
  border-radius: 10px;
  font-size: 20px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.subpage-sidebar-toggle svg {
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.front-subpage:not(.is-sidebar-collapsed) .subpage-sidebar-toggle svg {
  transform: rotate(180deg);
}

.subpage-sidebar-toggle:hover {
  color: var(--front-accent);
  background: #fffdf8;
}

.subpage-search {
  display: block;
  margin: 0 0 26px;
  transition: opacity 0.25s, visibility 0.25s;
}

.subpage-search input {
  min-height: 46px;
  color: var(--front-ink);
  background: var(--front-surface);
  border-color: var(--front-line-strong);
  border-radius: 8px;
  font-size: 17px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.subpage-menu {
  display: grid;
  gap: 26px;
}

.subpage-menu section,
.subpage-menu-items {
  display: grid;
  gap: 8px;
}

.subpage-menu-category {
  justify-content: space-between;
  width: 100%;
  min-height: 32px;
  padding: 0 8px;
  color: var(--front-subtle);
  background: transparent;
  font-size: 18px;
  font-weight: 800;
}

.subpage-menu-category:hover {
  background: transparent;
}

.subpage-menu-category span {
  color: var(--front-accent);
}

.subpage-menu-items[hidden],
.tool-view[hidden] {
  display: none;
}

.subpage-menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  padding: 0 20px;
  color: var(--front-ink);
  border-radius: 8px;
  font-size: 20px;
  transition: padding 0.35s cubic-bezier(0.4, 0, 0.2, 1), min-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.subpage-menu-item span {
  width: 28px;
  text-align: center;
}

.subpage-menu-item strong {
  font-weight: 600;
}

.subpage-menu-item.active {
  background: var(--front-surface-active);
}

.is-sidebar-collapsed {
  grid-template-columns: 68px minmax(0, 1fr);
}

.is-sidebar-collapsed .subpage-sidebar {
  padding: 22px 10px;
}

.is-sidebar-collapsed .subpage-sidebar-top {
  flex-direction: column;
  margin: 0 0 20px;
}

.is-sidebar-collapsed .subpage-search,
.is-sidebar-collapsed .subpage-menu-category,
.is-sidebar-collapsed .subpage-menu-item strong {
  opacity: 0;
  visibility: hidden;
  position: absolute;
  pointer-events: none;
}

.is-sidebar-collapsed .subpage-menu {
  gap: 10px;
}

.is-sidebar-collapsed .subpage-menu-section,
.is-sidebar-collapsed .subpage-menu-items {
  gap: 10px;
}

.is-sidebar-collapsed .subpage-menu-item {
  justify-content: center;
  min-height: 52px;
  padding: 0;
}

.is-sidebar-collapsed .subpage-menu-item span {
  width: auto;
  font-size: 22px;
}

.tool-view {
  display: block;
}

.subpage-main {
  width: min(1180px, 100%);
  padding: 34px clamp(20px, 4vw, 58px) 46px;
}

.subpage-heading {
  margin-bottom: 42px;
  text-align: center;
}

.subpage-heading h1 {
  margin: 0;
  color: var(--front-ink);
  font-size: 38px;
  line-height: 1.2;
}

.subpage-heading p {
  margin: 16px 0 0;
  color: var(--front-muted);
  font-size: 19px;
}

.tool-workspace {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(320px, 1.75fr);
  gap: 34px;
  align-items: start;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--front-line);
}

.tool-panel {
  display: grid;
  gap: 16px;
}

.tool-panel-head {
  display: grid;
  grid-template-columns: 1fr 130px;
  gap: 18px;
  align-items: center;
}

.tool-panel h2,
.tool-example h2 {
  margin: 0;
  color: var(--front-ink);
  font-size: 24px;
}

.muted-button {
  min-height: 46px;
  color: #fff;
  background: var(--front-accent-soft);
  border-radius: 6px;
  font-size: 18px;
  font-weight: 700;
}

.muted-button:hover {
  background: var(--front-accent);
}

.tool-panel textarea {
  min-height: 470px;
  padding: 20px;
  color: var(--front-muted);
  background: var(--front-surface);
  border-color: var(--front-line-strong);
  border-radius: 8px;
  font-size: 20px;
  line-height: 1.65;
}

.tool-panel textarea[readonly] {
  background: #fffdf8;
}

.tool-example {
  display: grid;
  gap: 22px;
  padding-top: 32px;
}

.example-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}

.example-grid article {
  min-height: 150px;
  padding: 24px;
  background: var(--front-surface);
  border: 1px solid var(--front-line);
  border-radius: 8px;
}

.example-grid h3 {
  margin: 0 0 22px;
  color: var(--front-ink);
  font-size: 20px;
}

.example-grid pre {
  margin: 0;
  color: var(--front-muted);
  font: 18px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  white-space: pre-wrap;
}

.empty-tool {
  display: grid;
  min-height: 420px;
  place-items: center;
  color: var(--front-muted);
  background: var(--front-surface);
  border: 1px solid var(--front-line);
  border-radius: 8px;
  font-size: 20px;
  font-weight: 700;
}

body[data-active-tool="json-format"] .subpage-main,
body[data-active-tool="string-format"] .subpage-main,
body[data-active-tool="url-codec"] .subpage-main,
body[data-active-tool="unicode-chinese"] .subpage-main {
  width: 100%;
  max-width: none;
  padding: 0;
}

.json-tool-view,
.string-tool-view,
.url-codec-tool-view,
.unicode-chinese-tool-view {
  min-height: 100vh;
}

.json-tool {
  display: grid;
  grid-template-columns: minmax(320px, 0.42fr) minmax(420px, 0.58fr);
  min-height: 100vh;
  background: var(--front-bg);
}

.json-input-area,
.json-result-area {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  min-width: 0;
  background: var(--front-surface);
}

.json-input-area {
  border-right: 8px solid var(--front-surface-soft);
}

.json-panel-head,
.json-toolbar {
  min-height: 58px;
  padding: 10px 18px;
  background: var(--front-surface);
  border-bottom: 1px solid var(--front-line);
}

.json-panel-head {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.json-panel-head h1 {
  margin: 0;
  color: var(--front-ink);
  font-size: 18px;
  line-height: 1.2;
}

.json-input-area textarea {
  min-height: 0;
  height: 100%;
  padding: 18px;
  color: var(--front-ink);
  background: var(--front-surface);
  border: 0;
  border-radius: 0;
  font: 15px/1.7 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  resize: none;
}

.json-input-area textarea:focus {
  outline: 0;
}

.string-output {
  min-height: 0;
  height: 100%;
  padding: 18px;
  color: var(--front-ink);
  background: #fffdf8;
  border: 0;
  border-radius: 0;
  font: 15px/1.7 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  resize: none;
}

.string-output:focus {
  outline: 0;
}

.json-toolbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(240px, 0.75fr);
  align-items: center;
  gap: 14px;
}

.string-toolbar {
  grid-template-columns: 1fr;
}

.url-codec-toolbar {
  grid-template-columns: 1fr;
}

.unicode-chinese-toolbar {
  grid-template-columns: 1fr;
}

.tool-checkbox {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 0 10px;
  color: var(--front-muted);
  background: #fffdf8;
  border: 1px solid var(--front-line-strong);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.tool-checkbox input {
  width: 15px;
  height: 15px;
  accent-color: var(--front-accent);
}

.json-toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.segmented-control {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.mode-button,
.primary-tool-button,
.success-tool-button,
.icon-tool-button {
  min-height: 34px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
}

.mode-button {
  min-width: 78px;
  color: var(--front-muted);
  background: #fffdf8;
  border: 1px solid var(--front-line-strong);
}

.mode-button.active,
.primary-tool-button,
.success-tool-button {
  color: #fff;
}

.mode-button.active {
  background: var(--front-accent);
  border-color: var(--front-accent);
}

.primary-tool-button,
.success-tool-button {
  background: var(--front-accent);
}

.mode-button.active:hover,
.mode-button:hover,
.primary-tool-button:hover,
.success-tool-button:hover {
  background: #8f5623;
}

.success-tool-button {
  min-width: 130px;
}

.json-search-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(46px, auto) 34px 34px;
  gap: 8px;
}

.json-search-row input {
  min-height: 34px;
  color: var(--front-ink);
  background: #fffdf8;
  border-color: var(--front-line-strong);
  border-radius: 6px;
  font-size: 14px;
}

.json-search-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 8px;
  color: #57534e;
  background: #fffdf8;
  border: 1px solid var(--front-line-strong);
  border-radius: 6px;
  font-size: 13px;
  white-space: nowrap;
}

.icon-tool-button {
  width: 34px;
  min-width: 34px;
  padding: 0;
  color: #fff;
  background: var(--front-accent-soft);
  border: 0;
}

.icon-tool-button:hover {
  background: var(--front-accent);
}

.compact-tool-button {
  min-height: 34px;
  padding: 0 10px;
  color: #fff;
  background: var(--front-accent-soft);
  border: 0;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
}

.compact-tool-button:hover {
  background: var(--front-accent);
}

.json-toolbar-actions .compact-tool-button:first-child {
  background: var(--front-accent);
}

.json-toolbar-actions .compact-tool-button:first-child:hover {
  background: #8f5623;
}

.json-result {
  min-height: 0;
  max-height: none;
  overflow: auto;
  padding: 16px 0;
  color: var(--front-ink);
  background: #fffdf8;
  border: 0;
  border-radius: 0;
  font: 15px/1.7 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.json-line {
  display: grid;
  grid-template-columns: 50px 24px minmax(0, 1fr);
  align-items: start;
  padding: 0 16px;
}

.json-placeholder {
  display: grid;
  grid-template-columns: 50px minmax(0, 1fr);
  align-items: start;
  padding: 0 16px;
}

.json-line-number {
  color: #a8a29e;
  user-select: none;
}

.json-line[hidden] {
  display: none;
}

.json-fold {
  width: 20px;
  min-height: 24px;
  padding: 0;
  color: var(--front-accent);
  background: transparent;
  font: inherit;
}

.json-fold:disabled {
  cursor: default;
  opacity: 0;
}

.json-fold:hover {
  background: transparent;
}

.json-line-content {
  min-width: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.json-collapsed-placeholder {
  color: #57534e;
}

.json-search-hit {
  background: rgba(250, 204, 21, 0.22);
}

.json-search-hit.current {
  background: rgba(22, 119, 255, 0.18);
}

.json-search-keyword {
  padding: 0 2px;
  color: #111827;
  background: #facc15;
  border-radius: 3px;
}

.json-search-keyword.current {
  color: #fff;
  background: #1677ff;
}

.url-codec-output-wrap {
  display: grid;
  grid-template-rows: minmax(260px, 0.62fr) auto;
  min-height: 0;
  background: #fffdf8;
}

.url-codec-params {
  margin: 16px;
  padding: 14px;
  background: var(--front-surface);
  border: 1px solid var(--front-line);
  border-radius: 8px;
}

.url-codec-params-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.url-codec-params-head h2 {
  margin: 0;
  color: var(--front-ink);
  font-size: 16px;
}

.url-codec-params-head span,
.url-codec-params-empty {
  color: var(--front-muted);
  font-size: 13px;
}

.url-codec-params-list {
  display: grid;
  gap: 8px;
}

.url-codec-param-row {
  display: grid;
  grid-template-columns: minmax(110px, 0.32fr) minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 10px;
  background: #fffdf8;
  border: 1px solid var(--front-line);
  border-radius: 6px;
}

.url-codec-param-row code,
.url-codec-param-row span {
  min-width: 0;
  overflow-wrap: anywhere;
  font: 14px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.url-codec-param-row code {
  color: var(--front-accent);
}

.form-result {
  margin: 0;
  padding: 8px 28px;
  color: #111827;
  font: 20px/1.7 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre-wrap;
}

.json-error {
  padding: 24px;
  color: #912018;
  font-weight: 700;
}

.timestamp-tool {
  display: grid;
  gap: 42px;
  padding: 8px 0;
}

.timestamp-topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  align-items: center;
}

.timestamp-unit-tabs {
  display: inline-grid;
  grid-template-columns: repeat(5, minmax(82px, 1fr));
  overflow: hidden;
  border: 1px solid var(--front-line-strong);
  border-radius: 8px;
}

.timestamp-unit {
  min-height: 46px;
  color: var(--front-muted);
  background: #fffdf8;
  border-radius: 0;
  border-right: 1px solid var(--front-line-strong);
  font-size: 18px;
  font-weight: 800;
}

.timestamp-unit:last-child {
  border-right: 0;
}

.timestamp-unit.active {
  color: #58b83f;
  background: #eff9e8;
}

.timestamp-unit:hover {
  background: var(--front-surface);
}

.modern-select {
  position: relative;
  width: min(320px, 100%);
}

.modern-select-trigger {
  justify-content: space-between;
  width: 100%;
  min-height: 46px;
  padding: 0 14px 0 18px;
  color: var(--front-muted);
  background: #fffdf8;
  border: 1px solid var(--front-line-strong);
  border-radius: 8px;
  font-size: 18px;
}

.modern-select-trigger:hover,
.modern-select-trigger[aria-expanded="true"] {
  color: var(--front-ink);
  background: var(--front-surface);
  border-color: var(--front-accent-soft);
  box-shadow: 0 0 0 3px rgba(198, 173, 143, 0.18);
}

.modern-select-chevron {
  color: var(--front-subtle);
  font-size: 22px;
  line-height: 1;
}

.modern-select-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  z-index: 10;
  display: grid;
  width: 100%;
  padding: 6px;
  background: #fffdf8;
  border: 1px solid var(--front-line-strong);
  border-radius: 8px;
  box-shadow: 0 16px 36px rgba(47, 39, 31, 0.12);
}

.modern-select-menu[hidden] {
  display: none;
}

.modern-select-option {
  justify-content: flex-start;
  min-height: 40px;
  color: var(--front-muted);
  background: transparent;
  border-radius: 6px;
  font-size: 17px;
}

.modern-select-option.active,
.modern-select-option:hover {
  color: var(--front-ink);
  background: var(--front-surface-active);
}

.timestamp-section {
  display: grid;
  gap: 18px;
}

.timestamp-section h2,
.timestamp-current h2 {
  margin: 0;
  color: var(--front-ink);
  font-size: 24px;
}

.timestamp-row {
  display: grid;
  grid-template-columns: minmax(260px, 420px) 130px minmax(280px, 480px);
  gap: 28px;
  align-items: center;
}

.timestamp-row input {
  min-height: 48px;
  color: var(--front-ink);
  background: #fffdf8;
  border-color: var(--front-line-strong);
  font-size: 18px;
}

.modern-datetime {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: center;
  min-height: 48px;
  padding: 0 10px;
  background: #fffdf8;
  border: 1px solid var(--front-line-strong);
  border-radius: 8px;
}

.modern-datetime:focus-within {
  border-color: var(--front-accent-soft);
  box-shadow: 0 0 0 3px rgba(198, 173, 143, 0.18);
}

.modern-input-icon {
  color: var(--front-subtle);
  font-size: 20px;
}

.modern-datetime input {
  min-height: 38px;
  padding: 0 4px;
  color: var(--front-ink);
  background: transparent;
  border: 0;
  border-radius: 0;
  font-size: 17px;
  color-scheme: light;
}

.modern-datetime input:focus {
  outline: 0;
}

.modern-datetime input::-webkit-calendar-picker-indicator {
  padding: 5px;
  border-radius: 6px;
  cursor: pointer;
  opacity: 0.62;
}

.modern-datetime input::-webkit-calendar-picker-indicator:hover {
  background: var(--front-surface-active);
  opacity: 1;
}

.timestamp-result-input {
  font-size: 24px;
  font-weight: 800;
}

.timestamp-action {
  min-height: 48px;
  color: #fff;
  background: var(--front-accent-soft);
  border-radius: 6px;
  font-size: 18px;
  font-weight: 800;
}

.timestamp-action:hover {
  background: var(--front-accent);
}

.timestamp-current {
  display: grid;
  gap: 14px;
  margin-top: 30px;
}

.timestamp-current-value {
  color: #18a45b;
  font-size: 44px;
  font-weight: 900;
  line-height: 1.2;
}

.timestamp-current-time {
  margin-top: -4px;
  color: var(--front-ink);
  font-size: 34px;
  font-weight: 800;
}

.timestamp-current-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  margin-top: 14px;
}

.timestamp-secondary {
  min-height: 46px;
  color: var(--front-muted);
  background: #fffdf8;
  border: 1px solid var(--front-line-strong);
  border-radius: 6px;
  font-size: 18px;
  font-weight: 800;
}

.timestamp-secondary:hover {
  color: var(--front-ink);
  background: var(--front-surface);
}

/* JWT Tool */
.jwt-tool {
  display: grid;
  gap: 36px;
  padding: 8px 0;
}

.jwt-header {
  text-align: center;
}

.jwt-header h1 {
  margin: 0 0 8px;
  font-size: 28px;
  color: var(--front-ink);
}

.jwt-header p {
  margin: 0;
  color: var(--front-muted);
  font-size: 15px;
}

.jwt-input-section {
  display: grid;
  gap: 16px;
}

.jwt-input-section textarea {
  min-height: 120px;
  padding: 18px 20px;
  color: var(--front-ink);
  background: var(--front-surface);
  border: 1px solid var(--front-line-strong);
  border-radius: 8px;
  font: 15px/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  resize: vertical;
}

.jwt-parse-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  justify-self: start;
  min-height: 44px;
  padding: 0 24px;
  color: #fff;
  background: var(--front-accent);
  border: 1px solid var(--front-accent);
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.jwt-parse-button:hover {
  background: var(--front-surface);
  color: var(--front-ink);
  border-color: var(--front-line-strong);
}

.jwt-result {
  display: grid;
  gap: 20px;
}

.jwt-result-card {
  background: var(--front-surface);
  border: 1px solid var(--front-line);
  border-radius: 10px;
  overflow: hidden;
}

.jwt-result-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--front-line);
}

.jwt-result-card-head h2 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--front-ink);
}

.jwt-code-block {
  margin: 0;
  padding: 18px 24px;
  color: var(--front-ink);
  background: #f8fafc;
  font: 14px/1.7 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre-wrap;
  word-break: break-all;
  overflow-x: auto;
}

.jwt-signature-card {
  padding: 18px 24px;
}

.jwt-signature-label {
  margin: 0 0 8px;
  color: var(--front-muted);
  font-size: 14px;
}

.jwt-signature-value {
  display: block;
  padding: 10px 16px;
  color: var(--front-ink);
  background: #f8fafc;
  border-radius: 6px;
  font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  word-break: break-all;
}

.jwt-error {
  padding: 16px 20px;
  color: #912018;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 8px;
  font-weight: 600;
}

.jwt-explanation {
  display: grid;
  gap: 20px;
  margin-top: 12px;
}

.jwt-explanation > h2 {
  margin: 0;
  font-size: 22px;
  color: var(--front-ink);
}

.jwt-explanation-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.jwt-explanation-grid article,
.jwt-notice {
  padding: 20px;
  background: var(--front-surface);
  border: 1px solid var(--front-line);
  border-radius: 8px;
}

.jwt-explanation-grid h3,
.jwt-notice h3 {
  margin: 0 0 10px;
  font-size: 16px;
  color: var(--front-ink);
}

.jwt-explanation-grid p,
.jwt-notice p {
  margin: 0;
  color: var(--front-muted);
  font-size: 14px;
  line-height: 1.7;
}

.jwt-explanation-grid ul {
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--front-muted);
  font-size: 14px;
  line-height: 1.9;
}

.jwt-explanation-grid code {
  color: #dc2626;
  font-weight: 600;
}

.button,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  color: #fff;
  background: #2f271f;
  border: 0;
  border-radius: 6px;
  font: inherit;
  cursor: pointer;
}

.button:hover,
button:hover {
  background: #4a3b2e;
}

.button.secondary {
  color: #2f271f;
  background: #eadfce;
}

.button.secondary:hover {
  background: #ddceb8;
}

.admin-login-page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 20px;
}

.login-box {
  width: min(420px, 100%);
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.login-logo {
  display: block;
  width: 58px;
  height: 58px;
  margin-bottom: 18px;
  border-radius: 14px;
  box-shadow: 0 14px 30px rgba(47, 39, 31, 0.18);
}

.admin-page {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  min-height: 100vh;
}

.admin-nav {
  padding: 24px;
  background: #10243d;
  color: #fff;
}

.admin-nav nav {
  flex-direction: column;
  margin: 28px 0;
}

.admin-main {
  padding: 32px;
}

.title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.form {
  display: grid;
  gap: 16px;
}

.form label {
  display: grid;
  gap: 8px;
  font-weight: 700;
}

input,
textarea,
select {
  width: 100%;
  min-height: 40px;
  padding: 8px 10px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
}

textarea {
  resize: vertical;
}

.form-preview {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.avatar-preview {
  width: 72px;
  height: 72px;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.table th,
.table td {
  padding: 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.actions form {
  margin: 0;
}

.danger {
  background: var(--danger);
}

.danger:hover {
  background: #b42318;
}

.link-button {
  padding: 0;
  min-height: auto;
  color: #fff;
  background: transparent;
}

.link-button:hover {
  background: transparent;
  text-decoration: underline;
}

.alert {
  padding: 12px;
  border-radius: 6px;
}

.alert.error {
  color: #912018;
  background: #fef3f2;
}

.alert.success {
  color: #067647;
  background: #ecfdf3;
}

@media (max-width: 760px) {
  .site-header,
  .title-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .profile-card,
  .contact-grid,
  .about-grid,
  .project-grid,
  .stats,
  .admin-page {
    grid-template-columns: 1fr;
  }

  .profile-card {
    padding: 28px;
    min-height: auto;
  }

  .profile-hero h1 {
    font-size: 30px;
  }

  .admin-nav nav {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .front-subpage {
    grid-template-columns: 1fr;
  }

  .subpage-sidebar {
    position: static;
    height: auto;
  }

  .subpage-sidebar-top {
    margin: 0 0 18px;
  }

  .is-sidebar-collapsed {
    grid-template-columns: 1fr;
  }

  .is-sidebar-collapsed .subpage-sidebar {
    padding: 22px 14px;
  }

  .is-sidebar-collapsed .subpage-sidebar-top {
    flex-direction: row;
    margin: 0 0 18px;
  }

  .is-sidebar-collapsed .subpage-search,
  .is-sidebar-collapsed .subpage-menu-category,
  .is-sidebar-collapsed .subpage-menu-item strong {
    display: initial;
  }

  .is-sidebar-collapsed .subpage-menu-item {
    justify-content: flex-start;
    min-height: 48px;
    padding: 0 20px;
  }

  .is-sidebar-collapsed .subpage-menu-item span {
    width: 28px;
    font-size: inherit;
  }

  .subpage-menu {
    gap: 14px;
  }

  .subpage-main {
    padding-top: 28px;
  }

  .subpage-heading {
    margin-bottom: 28px;
    text-align: left;
  }

  .subpage-heading h1 {
    font-size: 30px;
  }

  .tool-workspace,
  .example-grid {
    grid-template-columns: 1fr;
  }

  body[data-active-tool="json-format"] .subpage-main,
  body[data-active-tool="string-format"] .subpage-main,
  body[data-active-tool="url-codec"] .subpage-main,
  body[data-active-tool="unicode-chinese"] .subpage-main {
    padding: 0;
  }

  .json-tool {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .json-input-area {
    min-height: 44vh;
    border-right: 0;
    border-bottom: 8px solid var(--front-surface-soft);
  }

  .json-result-area {
    min-height: 56vh;
  }

  .json-panel-head,
  .json-toolbar {
    padding: 10px 12px;
  }

  .json-panel-head,
  .json-toolbar,
  .json-toolbar-actions {
    align-items: stretch;
  }

  .json-toolbar {
    grid-template-columns: 1fr;
  }

  .segmented-control {
    flex-wrap: nowrap;
  }

  .json-toolbar-actions {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .url-codec-toolbar .json-toolbar-actions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .unicode-chinese-toolbar .json-toolbar-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .url-codec-param-row {
    grid-template-columns: 1fr;
  }

  .json-toolbar-actions .compact-tool-button,
  .json-toolbar-actions .icon-tool-button {
    width: 100%;
    min-width: 0;
    padding: 0 6px;
  }

  .tool-panel-head {
    grid-template-columns: 1fr 110px;
  }

  .tool-panel textarea {
    min-height: 300px;
    font-size: 17px;
  }

  .timestamp-unit-tabs,
  .timestamp-row {
    grid-template-columns: 1fr;
  }

  .timestamp-topbar,
  .timestamp-current-actions {
    gap: 12px;
  }

  .timestamp-current-value {
    font-size: 34px;
  }

  .timestamp-current-time {
    font-size: 26px;
  }
}

/* ── 特效 ──────────────────────────────────── */

/* 滚动进度条 */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 999;
  height: 3px;
  background: linear-gradient(90deg, #a66a2f, #c6ad8f);
  width: 0%;
  transition: width 0.1s linear;
  pointer-events: none;
}

/* Hero 渐变光球 */
.hero-orbs {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: orbFloat 8s ease-in-out infinite;
}

.hero-orb-1 {
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, #c6ad8f, #a66a2f);
  top: -120px;
  right: -80px;
  animation-duration: 9s;
}

.hero-orb-2 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, #e2d5c2, #c6ad8f);
  bottom: -60px;
  left: -60px;
  animation-duration: 11s;
  animation-delay: -3s;
}

.hero-orb-3 {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, #a66a2f, #7a4f1f);
  top: 40%;
  left: 30%;
  animation-duration: 14s;
  animation-delay: -6s;
  opacity: 0.18;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25%       { transform: translate(20px, -30px) scale(1.05); }
  50%       { transform: translate(-15px, 20px) scale(0.97); }
  75%       { transform: translate(25px, 15px) scale(1.03); }
}

/* Hero 卡片入场动画 */
@keyframes heroSlideUp {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}

.profile-card {
  animation: heroSlideUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.profile-copy .location,
.profile-copy .hello,
.profile-copy h1,
.profile-copy p,
.profile-actions {
  animation: heroSlideUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.profile-copy .location  { animation-delay: 0.1s; opacity: 0; }
.profile-copy .hello    { animation-delay: 0.2s; opacity: 0; }
.profile-copy h1        { animation-delay: 0.3s; opacity: 0; }
.profile-copy p         { animation-delay: 0.4s; opacity: 0; }
.profile-actions         { animation-delay: 0.55s; opacity: 0; }

/* 头像呼吸光晕 */
@keyframes avatarGlow {
  0%, 100% { box-shadow: 0 18px 40px rgba(69,52,36,0.16), 0 0 0 0 rgba(166,106,47,0); }
  50%       { box-shadow: 0 18px 40px rgba(69,52,36,0.16), 0 0 0 14px rgba(166,106,47,0.12); }
}

.avatar {
  animation: avatarGlow 3s ease-in-out infinite;
}

/* 打字机光标 */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

.typing-cursor {
  display: inline-block;
  width: 3px;
  height: 1.1em;
  background: #a66a2f;
  margin-left: 3px;
  vertical-align: text-bottom;
  animation: blink 0.9s step-end infinite;
}

/* 滚动入场动画 */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.22,1,0.36,1), transform 0.7s cubic-bezier(0.22,1,0.36,1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-32px);
  transition: opacity 0.7s cubic-bezier(0.22,1,0.36,1), transform 0.7s cubic-bezier(0.22,1,0.36,1);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* 项目卡片悬停 */
.project-grid article {
  transition: transform 0.3s cubic-bezier(0.22,1,0.36,1), box-shadow 0.3s ease, border-color 0.3s ease;
  cursor: default;
}

.project-grid article:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(166,106,47,0.14);
  border-color: rgba(166,106,47,0.3);
}

.project-grid article:hover > span {
  color: #a66a2f;
}

/* 关于区块入场 */
.about-grid {
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.about-grid .reveal-side {
  opacity: 0;
  transform: translateX(24px);
  transition: opacity 0.7s ease 0.1s, transform 0.7s ease 0.1s;
}

.about-grid .reveal-side.visible {
  opacity: 1;
  transform: translateX(0);
}

/* 导航链接下划线动画 */
.site-header nav a {
  position: relative;
  padding-bottom: 2px;
}

.site-header nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: #a66a2f;
  border-radius: 2px;
  transition: width 0.25s ease;
}

.site-header nav a:hover::after,
.site-header nav a.active::after {
  width: 100%;
}

/* 按钮悬停微光 */
.button {
  position: relative;
  overflow: hidden;
}

.button::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.08);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.button:hover::after {
  opacity: 1;
}

/* 数字序号脉冲 */
@keyframes numberPulse {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.15); }
  100% { transform: scale(1); }
}

.project-grid article:hover > span {
  animation: numberPulse 0.5s ease;
}

/* 关于区块数字入场 */
.about-grid dl div {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about-grid dl div:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(166,106,47,0.1);
}

/* 联系区块悬停 */
.contact-grid > div {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-grid > div:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(166,106,47,0.1);
}

/* header 滚动后加深背景 */
.site-header.scrolled {
  background: rgba(247, 243, 235, 0.98);
  box-shadow: 0 2px 16px rgba(47,39,31,0.08);
}