:root {
  --paper: #fff8dc;
  --surface: #fff;
  --sidebar: #151329;
  --sidebar-muted: #aaa8c1;
  --ink: #151329;
  --muted: #4c4b66;
  --line: #151329;
  --acid: #f5e641;
  --red: #d94355;
  --blue: #4455c9;
  --green: #3d8b6f;
  --purple: #7652a8;
  --orange: #c56c32;
  --cyan: #268b91;
  --night: #151329;
  --toolbox-scrollbar-thumb: var(--ink);
  --toolbox-scrollbar-thumb-hover: var(--acid);
}

* {
  box-sizing: border-box;
  scrollbar-width: thin;
  scrollbar-color: var(--toolbox-scrollbar-thumb) transparent;
}

/* 避免标准属性覆盖自定义滚动条伪元素样式。 */
@supports selector(::-webkit-scrollbar) {
  * {
    scrollbar-width: auto;
    scrollbar-color: auto;
  }
}

*::-webkit-scrollbar {
  width: 6px !important;
  height: 6px !important;
  background: transparent !important;
}

*::-webkit-scrollbar-track,
*::-webkit-scrollbar-corner {
  background: transparent !important;
}

*::-webkit-scrollbar-thumb {
  background: var(--toolbox-scrollbar-thumb) !important;
  border-radius: 999px !important;
}

*::-webkit-scrollbar-button {
  display: none !important;
}

*::-webkit-scrollbar-thumb:hover,
*::-webkit-scrollbar-thumb:active {
  background: var(--toolbox-scrollbar-thumb-hover) !important;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Courier Prime", "Noto Sans SC", "Microsoft YaHei", monospace;
}

a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { cursor: pointer; }
svg { display: block; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 16px;
  padding: 8px 12px;
  color: #fff;
  background: var(--ink);
  transform: translateY(-110%);
}
.skip-link:focus { transform: translateY(0); }

.tools-layout {
  display: flex;
  align-items: stretch;
  width: 100%;
  background: var(--paper);
  margin: 0 auto;
}
.tools-sidebar {
  position: fixed;
  display: flex;
  flex-direction: column;
  top: 0;
  bottom: 0;
  left: 0;
  align-self: flex-start;
  flex: none;
  width: 280px;
  height: 100vh;
  padding: 30px 18px 24px;
  background: var(--sidebar);
  overflow-y: auto;
  border-right: 3px solid var(--ink);
  scrollbar-color: var(--sidebar-muted) transparent;
}
.tools-sidebar::-webkit-scrollbar-thumb { background: var(--sidebar-muted) !important; }
.tools-sidebar::-webkit-scrollbar-thumb:hover,
.tools-sidebar::-webkit-scrollbar-thumb:active { background: var(--acid) !important; }
.tools-directory-label {
  margin: 0 0 12px 4px;
  color: var(--sidebar-muted);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 12px;
  font-weight: 700;
}
main {
  flex: 1;
  min-width: 0;
  max-width: none;
  margin: 0 0 0 280px;
  padding: 0 42px 52px;
}
.tools-profile { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 34px 0 24px; }
.tools-total { margin: 0; color: var(--ink); font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: 26px; font-weight: 900; white-space: nowrap; }
.tools-heading h1 {
  display: inline-block;
  margin: 0;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(38px, 5vw, 58px);
  color: var(--ink);
  font-weight: 900;
  line-height: 1.15;
  text-shadow: 5px 5px 0 var(--acid);
}
.tools-toolbar { padding: 22px 0 20px; }
.tools-search { display: block; position: relative; width: 100%; margin-bottom: 0; }
.tools-search-icon {
  position: absolute;
  top: 17px;
  left: 17px;
  width: 23px;
  height: 23px;
  fill: none;
  stroke: var(--muted);
  stroke-width: 2.2;
  stroke-linecap: round;
  pointer-events: none;
}
.tools-search input {
  width: 100%;
  min-height: 60px;
  padding: 14px 16px 14px 54px;
  color: var(--ink);
  background: var(--surface);
  border: 2px solid var(--ink);
  box-shadow: none;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  font-weight: 700;
  outline: none;
  appearance: none;
}
.tools-search input:focus {
  background: #fff;
  border-color: var(--blue);
  box-shadow: none;
}
.tools-search input::placeholder { color: #77758f; }
.tools-tabs { display: flex; flex: 1 1 auto; min-height: 0; flex-direction: column; justify-content: center; gap: 9px; }
.tools-sidebar-links { display: flex; flex: none; gap: 8px; }
.tools-sidebar-link {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: #fff;
  background: transparent;
  border: 2px solid #4c4674;
  transition: background 120ms steps(2, end), border-color 120ms steps(2, end), color 120ms steps(2, end);
}
.tools-sidebar-link:hover { color: var(--ink); background: var(--acid); border-color: var(--acid); }
.tools-sidebar-link svg { width: 19px; height: 19px; }
.tools-tab {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  min-height: 38px;
  padding: 7px 11px;
  color: #fff;
  background: transparent;
  border: 2px solid transparent;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  font-weight: 700;
}
.tools-tab:hover { color: #fff; background: #292542; border-color: #4c4674; }
.tools-tab.is-active { color: var(--ink); background: var(--acid); border-color: var(--acid); box-shadow: none; transform: none; }
.tools-tab-number { display: none; }
.tools-tab-count { color: var(--sidebar-muted); font: 13px "Courier Prime", monospace; }
.tools-tab.is-active .tools-tab-count { color: var(--ink); }

.tools-results-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; padding: 22px 0 10px; }
.tools-view-title { margin: 0; font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: 18px; font-weight: 900; }
.tools-count { margin: 0; color: var(--muted); font: 13px "Noto Sans SC", "Microsoft YaHei", sans-serif; font-weight: 700; }
.tools-empty { padding: 50px 16px; color: var(--muted); font: 14px/1.6 "Noto Sans SC", "Microsoft YaHei", sans-serif; text-align: center; }
.tools-section { padding: 16px 0 24px; }
.tools-section-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px; padding: 0 0 10px; }
.tools-section-number { display: none; }
.tools-section-title { margin: 0; font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: 25px; font-weight: 900; line-height: 1.3; text-shadow: 2px 2px 0 var(--acid); }
.tools-section-count { margin-left: auto; color: var(--muted); font: 14px "Noto Sans SC", "Microsoft YaHei", sans-serif; font-weight: 700; }
.tools-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.tools-card {
  display: flex;
  position: relative;
  align-items: flex-start;
  gap: 14px;
  min-width: 0;
  min-height: 172px;
  padding: 20px 16px;
  background: var(--surface);
  border: 3px solid var(--ink);
  box-shadow: 5px 5px 0 var(--ink);
  transition: transform 120ms steps(2, end), box-shadow 120ms steps(2, end);
}
.tools-card:active { background: var(--paper); box-shadow: 2px 2px 0 var(--card-shadow, var(--ink)); transform: translate(3px, 3px); }
.tools-card-icon {
  display: grid;
  position: relative;
  flex: none;
  place-items: center;
  width: 36px;
  height: 36px;
  color: var(--ink);
  background: var(--acid);
  border: 2px solid var(--ink);
  font: 14px "Courier Prime", monospace;
  font-weight: 700;
}
.tools-card-icon img { position: absolute; width: 20px; height: 20px; object-fit: contain; opacity: 0; }
.tools-card-icon img.is-loaded { opacity: 1; }
.tools-card-copy { min-width: 0; flex: 1; }
.tools-card-name { display: block; padding-right: 15px; color: var(--ink); font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: 17px; font-weight: 700; line-height: 1.4; overflow-wrap: anywhere; }
.tools-card-desc { display: block; margin-top: 8px; color: var(--muted); font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: 14px; line-height: 1.55; overflow-wrap: anywhere; }
.tools-card-host { display: block; margin-top: 8px; color: var(--muted); font: 12px/1.4 "Courier Prime", monospace; overflow-wrap: anywhere; }
.tools-card:hover .tools-card-desc { color: var(--ink); }

.tools-section.category-image-sources,
.tools-section.category-image-tools,
.tools-section.category-file-and-media-tools,
.tools-section.category-reading,
.tools-section.category-wiki,
.tools-section.category-acg,
.tools-section.category-developer-platforms,
.tools-section.category-communities-and-profiles,
.tools-section.category-learning-and-career,
.tools-section.category-accounts-and-subscriptions { --card-face: #fff; }

/* Keep every tool item on one stable card pattern; category colors only affect the shadow. */
.tools-section .tools-card,
.tools-section.category-file-and-media-tools .tools-card,
.tools-section.category-reading .tools-card,
.tools-section.category-developer-platforms .tools-card,
.tools-section.category-entertainment .tools-card,
.tools-section.category-acg .tools-card,
.tools-section.category-wiki .tools-card,
.tools-section.category-communities-and-profiles .tools-card,
.tools-section.category-accounts-and-subscriptions .tools-card {
  min-height: 112px;
  align-items: flex-start;
  padding: 13px 12px;
  background: var(--card-face, #fff);
  border: 3px solid var(--ink);
  border-radius: 0;
  box-shadow: 5px 5px 0 var(--card-shadow, var(--ink));
}
.tools-section .tools-card:hover,
.tools-section.category-file-and-media-tools .tools-card:hover,
.tools-section.category-reading .tools-card:hover,
.tools-section.category-developer-platforms .tools-card:hover,
.tools-section.category-entertainment .tools-card:hover,
.tools-section.category-acg .tools-card:hover,
.tools-section.category-wiki .tools-card:hover,
.tools-section.category-communities-and-profiles .tools-card:hover,
.tools-section.category-accounts-and-subscriptions .tools-card:hover {
  background: var(--card-active, var(--surface));
  box-shadow: 2px 2px 0 var(--card-shadow, var(--ink));
  transform: translate(3px, 3px);
}
.tools-section.category-image-sources { --card-shadow: var(--blue); }
.tools-section.category-image-sources { --card-active: #e3e8ff; }
.tools-section.category-publishing-tools { --card-shadow: var(--ink); }
.tools-section.category-publishing-tools { --card-active: #e8e8e8; }
.tools-section.category-entertainment { --card-shadow: var(--ink); }
.tools-section.category-entertainment { --card-active: #e8e8e8; }
.tools-section.category-image-tools { --card-shadow: var(--purple); }
.tools-section.category-image-tools { --card-active: #eee4ff; }
.tools-section.category-file-and-media-tools { --card-shadow: var(--orange); }
.tools-section.category-file-and-media-tools { --card-active: #fff0dc; }
.tools-section.category-reading { --card-shadow: var(--green); }
.tools-section.category-reading { --card-active: #def3e6; }
.tools-section.category-wiki { --card-shadow: var(--cyan); }
.tools-section.category-wiki { --card-active: #daf2f2; }
.tools-section.category-acg { --card-shadow: var(--purple); }
.tools-section.category-acg { --card-active: #f1e2f8; }
.tools-section.category-developer-platforms { --card-shadow: var(--cyan); }
.tools-section.category-developer-platforms { --card-active: #dff2f3; }
.tools-section.category-communities-and-profiles { --card-shadow: var(--blue); }
.tools-section.category-communities-and-profiles { --card-active: #e3e8ff; }
.tools-section.category-learning-and-career { --card-shadow: var(--green); }
.tools-section.category-learning-and-career { --card-active: #e3f3dc; }
.tools-section.category-accounts-and-subscriptions { --card-shadow: var(--red); }
.tools-section.category-accounts-and-subscriptions { --card-active: #ffe1e2; }

/* Each category keeps the same typography but uses a different browsing rhythm. */

.tools-section.category-image-sources .tools-section-number,
.tools-tab.category-image-sources .tools-tab-count { color: var(--blue); }
.tools-section.category-image-tools .tools-section-number,
.tools-tab.category-image-tools .tools-tab-count { color: var(--purple); }
.tools-section.category-file-and-media-tools .tools-section-number,
.tools-tab.category-file-and-media-tools .tools-tab-count { color: var(--orange); }
.tools-section.category-reading .tools-section-number,
.tools-tab.category-reading .tools-tab-count { color: var(--green); }
.tools-section.category-wiki .tools-section-number,
.tools-tab.category-wiki .tools-tab-count { color: var(--cyan); }
.tools-section.category-acg .tools-section-number,
.tools-tab.category-acg .tools-tab-count { color: var(--purple); }
.tools-section.category-developer-platforms .tools-section-number,
.tools-tab.category-developer-platforms .tools-tab-count { color: var(--cyan); }
.tools-section.category-communities-and-profiles .tools-section-number,
.tools-tab.category-communities-and-profiles .tools-tab-count { color: var(--blue); }
.tools-section.category-learning-and-career .tools-section-number,
.tools-tab.category-learning-and-career .tools-tab-count { color: var(--green); }
.tools-section.category-accounts-and-subscriptions .tools-section-number,
.tools-tab.category-accounts-and-subscriptions .tools-tab-count { color: var(--red); }

@media (min-width: 1500px) {
  .tools-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .tools-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 800px) {
  .tools-layout { display: block; width: 100%; min-height: 0; }

  /* 横向分类条：单行可横滑，滑到顶部自动吸顶，随内容滚动自动高亮 */
  .tools-sidebar {
    position: sticky;
    top: 0;
    bottom: auto;
    left: auto;
    z-index: 20;
    display: block;
    width: auto;
    height: auto;
    margin: 0 -16px;
    padding: calc(9px + env(safe-area-inset-top, 0px)) 0 9px;
    overflow: visible;
    background: var(--paper);
    border-right: 0;
    border-bottom: 3px solid var(--ink);
    cursor: grab;
  }
  .tools-directory-label { display: none; }
  .tools-tabs {
    flex: none;
    flex-direction: row;
    justify-content: flex-start;
    gap: 8px;
    padding: 2px 116px 4px 16px;
    overflow-x: auto;
    overflow-y: hidden;
    overscroll-behavior-x: contain;
    scroll-snap-type: x proximity;
    scroll-padding-left: 16px;
    scrollbar-width: none;
    -ms-overflow-style: none;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x;
  }
  .tools-sidebar-links {
    position: absolute;
    right: 12px;
    bottom: 13px;
    z-index: 1;
    gap: 7px;
  }
  .tools-sidebar-link {
    width: 44px;
    height: 44px;
    color: var(--ink);
    background: var(--surface);
    border: 2px solid var(--ink);
    box-shadow: 3px 3px 0 var(--ink);
  }
  .tools-sidebar-link:hover { color: var(--ink); background: var(--acid); border-color: var(--ink); }
  .tools-sidebar-link svg { width: 21px; height: 21px; }
  .tools-tabs::-webkit-scrollbar { display: none; }
  .tools-tab {
    flex: none;
    width: auto;
    min-height: 44px;
    padding: 8px 12px;
    white-space: nowrap;
    scroll-snap-align: center;
    color: var(--ink);
    background: var(--surface);
    border: 2px solid var(--ink);
    border-radius: 0;
    box-shadow: 3px 3px 0 var(--ink);
  }
  .tools-tab:hover { color: var(--ink); background: #fff; border-color: var(--ink); box-shadow: 3px 3px 0 var(--ink); }
  .tools-tab.is-active { color: var(--ink); background: var(--acid); border-color: var(--ink); box-shadow: 3px 3px 0 var(--ink); transform: none; }
  .tools-tab-count { color: var(--muted); }
  .tools-tab.is-active .tools-tab-count { color: var(--ink); }

  main { width: auto; margin: 0 16px; padding: 0 0 calc(40px + env(safe-area-inset-bottom, 0px)); }

  .tools-profile { flex-direction: column; align-items: flex-start; gap: 8px; padding: 22px 0 0; }
  .tools-heading h1 { font-size: clamp(30px, 9vw, 40px); text-shadow: 4px 4px 0 var(--acid); }
  .tools-total { font-size: 15px; }

  .tools-toolbar { padding: 18px 0 0; }
  .tools-search-icon { top: 17px; left: 16px; width: 21px; height: 21px; }
  .tools-search input { min-height: 54px; padding: 14px 16px 14px 50px; font-size: 16px; border: 2px solid var(--ink); border-radius: 0; box-shadow: none; }
  .tools-search input:focus { border-color: var(--blue); box-shadow: none; }

  .tools-results-head { padding: 20px 0 10px; }
  .tools-grid { grid-template-columns: minmax(0, 1fr); gap: 12px; }

  .tools-section { padding: 0 0 26px; scroll-margin-top: 76px; }
  .tools-section-head { margin-bottom: 12px; }
  .tools-section-title { font-size: 22px; text-shadow: 3px 3px 0 var(--card-shadow, var(--acid)); }
  .tools-section-count { font-size: 13px; }

  .tools-card,
  .tools-section .tools-card {
    min-height: 0;
    gap: 12px;
    padding: 14px 13px;
    background: var(--card-face, #fff);
    border: 3px solid var(--ink);
    border-radius: 0;
    box-shadow: 4px 4px 0 var(--card-shadow, var(--ink));
  }
  .tools-card:hover,
  .tools-section .tools-card:hover {
    background: var(--card-active, var(--surface));
    box-shadow: 2px 2px 0 var(--card-shadow, var(--ink));
    transform: translate(3px, 3px);
  }
  .tools-card-icon { width: 38px; height: 38px; border: 2px solid var(--ink); border-radius: 0; }
  .tools-card-icon img { width: 22px; height: 22px; }
  .tools-card-name { padding-right: 0; font-size: 16.5px; }
  .tools-card-desc { margin-top: 6px; font-size: 13.5px; }
  .tools-card-host { margin-top: 6px; font-size: 11.5px; }
}

@media (max-width: 380px) {
  .tools-sidebar { margin: 0 -14px; }
  .tools-tabs { padding-left: 14px; padding-right: 116px; scroll-padding-left: 14px; }
  .tools-tab { min-height: 42px; padding: 7px 10px; font-size: 14px; }
  .tools-section-title { font-size: 20px; }
  main { margin: 0 14px; }
}

@media (hover: none) and (pointer: coarse) {
   .tools-card:hover { background: var(--card-active, #fff); box-shadow: 1px 1px 0 var(--card-shadow, var(--ink)); transform: translate(3px, 3px); }
  .tools-card:hover .tools-card-desc { color: var(--muted); }
}