/* =========================================================
   在线工具集 - 全局样式
   职责范围：主题变量 / 布局框架 / 公共组件（按钮、Toast、导航）
   各工具的专属样式见 tools/<tool>/css/style.css
   ========================================================= */

/* ---------- 主题变量：浅色 ---------- */
:root {
  --color-bg: #f2f5fa;
  --color-surface: #ffffff;
  --color-surface-2: #eaeef6;
  --color-border: #d8dfec;
  --color-text: #1c2333;
  --color-text-2: #5d6880;
  --color-primary: #3b6cf6;
  --color-primary-hover: #2c57d6;
  --color-primary-soft: rgba(59, 108, 246, 0.12);
  --color-success: #16a34a;
  --color-danger: #dc2626;
  --color-warning: #d97706;
  --color-shadow: rgba(15, 23, 42, 0.09);
  --color-mono: #1c2333;
  --sidebar-width: 232px;
  --radius: 10px;
  --transition: 0.22s ease;
}

/* ---------- 主题变量：深色 ---------- */
[data-theme="dark"] {
  --color-bg: #0e1320;
  --color-surface: #161d2e;
  --color-surface-2: #1f2840;
  --color-border: #2b3650;
  --color-text: #e6eaf3;
  --color-text-2: #93a0ba;
  --color-primary: #6d8dff;
  --color-primary-hover: #84a0ff;
  --color-primary-soft: rgba(109, 141, 255, 0.16);
  --color-success: #34d399;
  --color-danger: #f87171;
  --color-warning: #fbbf24;
  --color-shadow: rgba(0, 0, 0, 0.42);
  --color-mono: #d8e0f0;
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color var(--transition), color var(--transition);
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}
input,
textarea {
  font-family: inherit;
  color: var(--color-text);
}
textarea {
  resize: vertical;
}

/* 等宽字体辅助变量 */
.mono {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

/* ---------- 布局框架 ---------- */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 16px 12px;
  transition: background-color var(--transition), border-color var(--transition);
  overflow-y: auto;
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 8px 18px;
}
.sidebar-brand svg {
  color: var(--color-primary);
  flex: 0 0 auto;
}
.sidebar-brand-text {
  font-size: 16px;
  font-weight: 700;
  white-space: nowrap;
}
.side-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 12px;
  border-radius: var(--radius);
  color: var(--color-text-2);
  font-size: 14px;
  width: 100%;
  text-align: left;
  transition: background-color var(--transition), color var(--transition);
}
.nav-item:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}
.nav-item.is-active {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 600;
}
.nav-item svg {
  flex: 0 0 auto;
}
.nav-text {
  white-space: nowrap;
}
.sidebar-footer {
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

/* 主题切换按钮 */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--color-text-2);
  transition: background-color var(--transition), color var(--transition);
}
.theme-toggle:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}
.theme-toggle .icon-moon {
  display: none;
}
.theme-toggle.is-dark .icon-sun {
  display: none;
}
.theme-toggle.is-dark .icon-moon {
  display: block;
}
.theme-toggle-text {
  font-size: 13px;
  white-space: nowrap;
}
.theme-toggle--top {
  width: 40px;
  height: 40px;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

/* 主内容区 */
.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100vh;
  overflow: hidden;
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 24px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition), border-color var(--transition);
}
.topbar-title {
  font-size: 18px;
  font-weight: 700;
}
.tool-viewport {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  background: var(--color-bg);
  transition: background-color var(--transition);
}

/* 站点页脚：网站标题 / 网址 / 备案信息 */
.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 10px 16px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  font-size: 12px;
  color: var(--color-text-2);
  transition: background-color var(--transition), border-color var(--transition),
    color var(--transition);
}
.site-footer-sep {
  opacity: 0.55;
  user-select: none;
}
.site-footer-link {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}
.site-footer-link:hover {
  color: var(--color-primary);
}

/* 工具面板切换动画 */
.tool-panel {
  display: none;
}
.tool-panel.is-active {
  display: block;
  animation: toolFadeIn 0.3s ease both;
}
.tool-panel.is-leaving {
  animation: toolFadeOut 0.15s ease both;
}
@keyframes toolFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
@keyframes toolFadeOut {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

/* ---------- 工具加载占位（懒加载期间替代空白） ---------- */
.tool-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-height: 240px;
  color: var(--color-text-2);
  animation: toolFadeIn 0.3s ease both;
}
.tool-spinner {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 3px solid var(--color-surface-2);
  border-top-color: var(--color-primary);
  animation: toolSpin 0.8s linear infinite;
}
@keyframes toolSpin {
  to {
    transform: rotate(360deg);
  }
}
.tool-loading-text {
  font-size: 13px;
}
.tool-loading.is-error .tool-spinner {
  border-top-color: var(--color-danger);
  animation: none;
}
.tool-retry {
  margin-top: 4px;
}

/* ---------- 汉堡菜单按钮（仅移动端显示） ---------- */
.menu-btn {
  display: none;
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text-2);
  transition: background-color var(--transition), color var(--transition);
}
.menu-btn:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

/* ---------- 移动端侧边栏遮罩 ---------- */
.sidebar-mask {
  position: fixed;
  inset: 0;
  z-index: 150;
  background: rgba(0, 0, 0, 0.45);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.28s ease;
}
.sidebar-mask.is-open {
  opacity: 1;
  pointer-events: auto;
}

/* ---------- 导航首页 ---------- */
.home-wrap {
  max-width: 980px;
  margin: 0 auto;
}
.home-hero {
  padding: 6px 4px 22px;
}
.home-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 6px;
}
.home-sub {
  font-size: 13px;
  color: var(--color-text-2);
}
.home-search {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  padding: 0 14px;
  height: 42px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-2);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.home-search:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}
.home-search input {
  flex: 1;
  min-width: 0;
  border: none;
  outline: none;
  background: transparent;
  color: var(--color-text);
  font-size: 14px;
}
.home-search input::placeholder {
  color: var(--color-text-2);
}
.home-search input::-webkit-search-cancel-button {
  cursor: pointer;
}
.home-empty {
  padding: 34px 16px;
  text-align: center;
  color: var(--color-text-2);
  font-size: 14px;
}
.home-empty p {
  margin: 0;
}
.home-empty-sub {
  margin-top: 6px !important;
  font-size: 12px;
  opacity: 0.8;
}
.home-card.is-hidden {
  display: none;
}
.home-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}
.home-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  text-align: left;
  transition: transform 0.18s ease, box-shadow var(--transition),
    border-color var(--transition), background-color var(--transition);
}
.home-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-primary);
  box-shadow: 0 10px 24px var(--color-shadow);
}
.home-card:active {
  transform: scale(0.98);
}
.home-icon {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-soft);
  color: var(--color-primary);
}
.home-info {
  flex: 1;
  min-width: 0;
}
.home-name {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}
.home-desc {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  color: var(--color-text-2);
  line-height: 1.5;
}
.home-arrow {
  flex: 0 0 auto;
  color: var(--color-text-2);
  opacity: 0.5;
  transition: transform var(--transition), color var(--transition),
    opacity var(--transition);
}
.home-card:hover .home-arrow {
  transform: translateX(3px);
  color: var(--color-primary);
  opacity: 1;
}

/* 公共按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 500;
  user-select: none;
  white-space: nowrap;
  transition: background-color var(--transition), color var(--transition),
    border-color var(--transition), box-shadow var(--transition),
    transform 0.12s ease;
}
.btn:active {
  transform: scale(0.97);
}
.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.btn--primary {
  background: var(--color-primary);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 4px 14px var(--color-shadow);
}
.btn--ghost {
  background: transparent;
  color: var(--color-text-2);
  border-color: var(--color-border);
}
.btn--ghost:hover {
  color: var(--color-text);
  border-color: var(--color-text-2);
}
.btn--danger {
  background: var(--color-danger);
  color: #fff;
}
.btn--danger:hover {
  opacity: 0.88;
}

/* ---------- Toast 提示 ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 16px);
  background: var(--color-surface);
  color: var(--color-text);
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 14px;
  box-shadow: 0 8px 24px var(--color-shadow);
  border: 1px solid var(--color-border);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 999;
  max-width: 86vw;
  text-align: center;
}
.toast--show {
  opacity: 1;
  transform: translate(-50%, 0);
}
.toast--success {
  border-color: var(--color-success);
  color: var(--color-success);
}
.toast--error {
  border-color: var(--color-danger);
  color: var(--color-danger);
}

/* 减弱动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- 断点 1：平板（侧栏收窄为纯图标） ---------- */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 76px;
  }
  .sidebar {
    padding: 16px 10px;
  }
  .sidebar-brand {
    justify-content: center;
    padding: 4px 0 18px;
  }
  .sidebar-brand-text,
  .nav-text,
  .theme-toggle-text {
    display: none;
  }
  .nav-item,
  .sidebar .theme-toggle {
    justify-content: center;
  }
  .nav-item {
    padding: 12px 0;
  }
  .topbar {
    padding: 12px 16px;
  }
  .tool-viewport {
    padding: 16px;
  }
}

/* ---------- 断点 2：移动端（侧边栏收起，点击汉堡按钮从左侧滑出） ---------- */
@media (max-width: 768px) {
  .app {
    grid-template-columns: 1fr;
  }
  .menu-btn {
    display: inline-flex;
  }
  .sidebar {
    display: flex;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 200;
    width: min(280px, 84vw);
    height: 100vh;
    transform: translateX(-100%);
    visibility: hidden;
    transition: transform 0.28s ease, visibility 0.28s;
    border-right: 1px solid var(--color-border);
  }
  .sidebar.is-open {
    transform: none;
    visibility: visible;
    box-shadow: 8px 0 32px var(--color-shadow);
  }
  /* 侧边栏滑出时恢复完整导航文字 */
  .sidebar-brand-text,
  .nav-text,
  .theme-toggle-text {
    display: inline;
  }
  .sidebar-brand {
    justify-content: flex-start;
    padding: 4px 6px 18px;
  }
  .nav-item,
  .sidebar .theme-toggle {
    justify-content: flex-start;
  }
  .nav-item {
    padding: 11px 12px;
  }
  .main {
    height: 100vh;
  }
  .topbar {
    padding: 10px 14px;
  }
  .tool-viewport {
    padding: 14px;
  }
  .toast {
    bottom: 28px;
  }
}

/* ---------- 断点 3：小屏手机（首页卡片单列） ---------- */
@media (max-width: 560px) {
  .home-grid {
    grid-template-columns: 1fr;
  }
}