/* --------------------------------
   1. 字体
   -------------------------------- */
@font-face {
  font-family: "f7";
  src: url("../font/f7.woff2") format("woff2");
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

/* --------------------------------
   2. CSS 变量：深色主题（默认）
   -------------------------------- */
:root,
[data-theme="dark"] {
  /* 基础色板 */
  --color-canvas: #0a0b0f;
  --color-surface: #14151c;
  --color-elevated: #1e2029;
  --color-line: #2a2d38;
  --color-line-strong: #3a3d4a;
  --color-ink: #f2f4f8;
  --color-ink-soft: #9aa0ae;
  --color-ink-faint: #5c6170;
  --color-primary: #5b6bff;
  --color-primary-hover: #7886ff;
  --color-success: #2be08c;
  --color-warning: #f5d547;
  --color-info: #3dd7e5;
  --color-danger: #ff3a5c;
  --color-strong: #ff3e96;
  --color-key-bg: #14151c;

  /* RGB 通道（用于透明度混合场景，如 backdrop-blur 背景） */
  --color-canvas-rgb: 8 10 15;
  --color-surface-rgb: 20 21 28;
  --color-elevated-rgb: 30 32 41;
  --color-primary-rgb: 91 107 255;

  /* 阴影 */
  --shadow-drawer: 8px 8px 40px rgba(0, 0, 0, 0.6);

  /* 圆角 */
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 8px;

  /* 主题切换按钮 */
  --toggle-bg: #1e2029;
  --toggle-border: #2a2d38;

  /* 使用说明提示框 */
  --tooltip-bg: rgb(30 32 41 / 0.96);
  --tooltip-border: var(--color-line);
  --tooltip-text: var(--color-ink-soft);
}

/* --------------------------------
   3. CSS 变量：浅色主题 (Apple 风格)
   -------------------------------- */
[data-theme="light"] {
  /* 基础色板 */
  --color-canvas: #f5f5f7;
  --color-surface: #ffffff;
  --color-elevated: #ffffff;
  --color-line: #e5e5ea;
  --color-line-strong: #d1d1d6;
  --color-ink: #1d1d1f;
  --color-ink-soft: #6e6e73;
  --color-ink-faint: #aeaeb2;
  --color-primary: #007aff;
  --color-primary-hover: #3395ff;
  --color-success: #34c759;
  --color-warning: #ff9500;
  --color-info: #5ac8fa;
  --color-danger: #ff3b30;
  --color-key-bg: #fff;

  /* RGB 通道 */
  --color-canvas-rgb: 245 245 247;
  --color-surface-rgb: 255 255 255;
  --color-elevated-rgb: 240 240 242;
  --color-primary-rgb: 0 122 255;

  /* 阴影 */
  --shadow-drawer: 0 4px 24px rgba(0, 0, 0, 0.08);

  /* 主题切换按钮 */
  --toggle-bg: #f0f0f2;
  --toggle-border: #e5e5ea;

  /* 使用说明提示框 */
  --tooltip-bg: rgb(255 255 255 / 0.96);
  --tooltip-border: var(--color-line);
  --tooltip-text: var(--color-ink-soft);
}

/* --------------------------------
   4. 页面主体背景
   -------------------------------- */
body {
  background: radial-gradient(1200px 700px at 80% -10%, rgba(91, 107, 255, 0.1), transparent 60%), radial-gradient(900px 600px at -10% 30%, rgba(61, 215, 229, 0.06), transparent 60%), var(--color-canvas);
  transition: background 0.5s ease;
}

[data-theme="light"] body {
  background: #e55d87; /* fallback for old browsers */
  background: -webkit-linear-gradient(to right, #5fc3e4, #e55d87); /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(to right, #5fc3e4, #e55d87); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}

/* --------------------------------
   4.1 滚动条：内容不溢出时不显示
   -------------------------------- */
html {
  overflow-y: auto;
  overflow-x: hidden;
}

/* --------------------------------
   4.2 页面滚动条样式 (Webkit)
   -------------------------------- */
html::-webkit-scrollbar {
  width: 6px;
}
html::-webkit-scrollbar-track {
  background: transparent;
}
html::-webkit-scrollbar-thumb {
  background: var(--color-line-strong);
  border-radius: 3px;
}
html::-webkit-scrollbar-thumb:hover {
  background: var(--color-ink-faint);
}

/* --------------------------------
   5. 文本选区色
   -------------------------------- */
::selection {
  background-color: rgb(var(--color-primary-rgb) / 0.12);
  color: var(--color-ink);
}

/* --------------------------------
   6. 顶部 Header 半透明毛玻璃背景
   -------------------------------- */
header {
  background-color: rgb(var(--color-canvas-rgb) / 0.82);
}

/* --------------------------------
   7. 桌面端侧边栏背景
   -------------------------------- */
aside.page-nav {
  background-color: rgb(var(--color-canvas-rgb) / 0.9);
}

/* --------------------------------
   8. 移动端抽屉背景
   -------------------------------- */
#mobile-nav-drawer {
  background-color: rgb(var(--color-surface-rgb) / 0.97);
}

/* --------------------------------
   9. 主题切换按钮
   -------------------------------- */
#theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--toggle-border);
  background: var(--toggle-bg);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  outline: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition:
    background 0.5s ease,
    border-color 0.5s ease,
    box-shadow 0.2s ease;
}

#theme-toggle:hover {
  box-shadow: 0 0 0 3px rgb(var(--color-primary-rgb) / 0.15);
}

#theme-toggle:active {
  transform: scale(0.92);
  transition: transform 0.15s ease;
}

#theme-toggle .icon-spin {
  display: inline-block;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
  backface-visibility: hidden;
}

#theme-toggle .icon-spin.is-rotating {
  transform: rotate(360deg);
}

/* --------------------------------
   10. 移动端遮罩层
   -------------------------------- */
#mobile-nav-overlay {
  display: none;
  opacity: 0;
  transition: opacity 250ms ease;
}

#mobile-nav-overlay.is-visible {
  display: block;
}

#mobile-nav-overlay.is-open {
  opacity: 1;
}

/* 移动端抽屉滑入/滑出 */
#mobile-nav-drawer {
  transform: translateX(-100%);
  transition: transform 300ms cubic-bezier(0.22, 1, 0.36, 1);
}

#mobile-nav-drawer.is-open {
  transform: translateX(0);
}

/* --------------------------------
   11. 抽屉滚动条（双主题适配）
   -------------------------------- */
#mobile-nav-drawer::-webkit-scrollbar {
  width: 4px;
}

#mobile-nav-drawer::-webkit-scrollbar-thumb {
  background: var(--color-line);
  border-radius: 4px;
}

#mobile-nav-drawer::-webkit-scrollbar-track {
  background: transparent;
}

/* --------------------------------
   12. 全局颜色过渡（避免割裂感）
   -------------------------------- */
*,
*::before,
*::after {
  transition:
    background-color 0.45s ease,
    color 0.45s ease,
    border-color 0.45s ease,
    box-shadow 0.45s ease,
    background 0.45s ease;
}

/* 排除不需要过渡的元素 */
#theme-toggle .icon-spin {
  /* 仅 transform 过渡，避免颜色过渡干扰旋转 */
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

#mobile-nav-drawer {
  /* 仅 transform 过渡，避免颜色过渡干扰滑入动画 */
  transition: transform 300ms cubic-bezier(0.22, 1, 0.36, 1);
}

#mobile-nav-overlay {
  transition: opacity 250ms ease;
}

/* ============================================================
13. 使用说明悬停提示框
============================================================ */
.help-wrap {
  position: relative;
}

.help-wrap::after {
  content: "";
  position: absolute;
  top: 100%;
  right: 0;
  width: 340px;
  max-width: 86vw;
  height: 14px;
  pointer-events: auto;
}

.help-tip {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  z-index: 60;
  width: 340px;
  max-width: 86vw;
  padding: 16px 18px 14px;
  border: 1px solid var(--tooltip-border);
  border-radius: var(--radius-md);
  background: var(--tooltip-bg);
  color: var(--tooltip-text);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.38);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.98);
  pointer-events: none;
  transition:
    opacity 0.22s ease,
    transform 0.22s ease,
    visibility 0.22s;
  font-size: 13px;
  line-height: 1.6;
}
.help-wrap:hover .help-tip,
.help-wrap:focus-within .help-tip {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.help-tip::before {
  content: "";
  position: absolute;
  top: -7px;
  right: 24px;
  width: 12px;
  height: 12px;
  border-top: 1px solid var(--tooltip-border);
  border-left: 1px solid var(--tooltip-border);
  background: var(--tooltip-bg);
  transform: rotate(45deg);
  border-top-left-radius: 3px;
}

.help-tip-title {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--tooltip-border);
  font-size: 15px;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: 0.2px;
}

.help-tip-list {
  margin: 0 0 10px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.help-tip-list li,
.help-tip-note {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.help-tip-ic {
  flex: 0 0 auto;
  line-height: 1.6;
  font-size: 14px;
}

.help-tip-note {
  padding: 9px 11px;
  margin-bottom: 11px;
  border-radius: var(--radius-md);
  background: rgba(var(--color-primary-rgb) / 0.1);
  border: 1px solid var(--tooltip-border);
}

.help-tip-dl {
  padding-top: 10px;
  border-top: 1px dashed var(--tooltip-border);
  color: var(--tooltip-text);
}

.help-tip-dl a {
  color: var(--color-primary);
  font-weight: 700;
  word-break: break-all;
  text-decoration: none;
  border-bottom: 1px solid rgba(var(--color-primary-rgb) / 0.4);
  transition:
    color 0.18s ease,
    border-color 0.18s ease;
}

.help-tip-dl a:hover {
  color: var(--color-primary-hover);
  border-bottom-color: var(--color-primary-hover);
}

.help-tip b {
  font-weight: 700;
  color: var(--color-ink);
}

/* ============================================================
14. 打字应用专用样式
============================================================ */
/* 模式项 - 激活态指示圆点 */
.mode-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  transition: box-shadow 0.2s ease;
}

.mode-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-family: var(--font-display, "PingFang SC", sans-serif);
  font-size: 14px;
  color: var(--color-ink-soft);
  cursor: pointer;
  transition: all 0.18s ease;
  user-select: none;
}

.mode-item:hover {
  border-color: var(--color-line);
  background: var(--color-surface);
  color: var(--color-ink);
}

.mode-item.is-active {
  background: var(--color-surface);
  color: var(--color-ink);
  border-color: transparent;
}

.mode-item.is-active .mode-dot {
  box-shadow: 0 0 0 3px rgb(var(--color-primary-rgb) / 0.18);
}

.mode-item[data-mode="english"] .mode-dot {
  background: #ff3a5c;
}

.mode-item[data-mode="quanpin"] .mode-dot {
  background: #ff9500;
}

.mode-item[data-mode="jianpin"] .mode-dot {
  background: #2be08c;
}

.mode-item[data-mode="wubi"] .mode-dot {
  background: #3dd7e5;
}

.mode-item[data-mode="alphanum"] .mode-dot {
  background: #a78bfa;
}

/* ===== 统计指标面板 ===== */
.stat-panel {
  display: inline-flex;
  align-items: stretch;
  gap: 0;
  padding: 8px 6px;
  border-radius: 12px;
  background: var(--color-elevated);
  border: 1px solid var(--color-line);
}

.stat-cell {
  position: relative;
  min-width: 78px;
  padding: 4px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.stat-cell + .stat-cell::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18%;
  bottom: 18%;
  width: 1px;
  background: var(--color-line);
}

.stat-label {
  font-size: 11px;
  color: var(--color-ink-soft);
  letter-spacing: 0.5px;
}

.stat-value {
  font-family: "f7";
  font-size: 22px;
  font-weight: 700;
  color: var(--color-info);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

/* ===== 文本显示区 ===== */
.typing-stage {
  position: relative;
  margin: 0 auto;
  /* max-width: 880px; */
  padding: 28px 40px;
  border-radius: 16px;
  background: var(--color-elevated);
  border: 1px solid var(--color-line);
  font-size: 22px;
  line-height: 1.85;
  letter-spacing: 0.3px;
  color: var(--color-ink-faint);
  font-family:
    "PingFang SC",
    "Microsoft YaHei",
    -apple-system,
    "Segoe UI",
    sans-serif;
  height: 240px;
  overflow: hidden;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

.typing-text {
  white-space: pre-wrap;
  word-break: break-word;
}

.typing-text .ch {
  position: relative;
  padding: 0 1px;
  border-radius: 3px;
  transition:
    color 0.12s ease,
    background-color 0.12s ease;
}

.typing-text .ch.is-correct {
  color: var(--color-ink);
}

.typing-text .ch.is-wrong {
  color: var(--color-danger);
  background: rgb(255 58 92 / 0.12);
  text-decoration: underline;
  text-decoration-color: rgb(255 58 92 / 0.5);
  text-decoration-thickness: 1.5px;
}

.typing-text .ch.is-current {
  background: rgb(var(--color-primary-rgb) / 0.18);
  border-bottom: 2px solid var(--color-primary);
  color: var(--color-ink);
}

.typing-text .ch.is-pending {
  color: var(--color-ink-faint);
}

/* 拼音模式：拼音提示 - 与汉字同号, 紧跟汉字右侧 */
.pinyin-hint {
  display: inline-block;
  font-size: 22px;
  line-height: 1;
  color: var(--color-ink-soft);
  font-family: "f7";
  letter-spacing: 0.5px;
  pointer-events: none;
  margin-left: 4px;
  margin-right: 6px;
  font-weight: 500;
  vertical-align: baseline;
}

.pinyin-hint .py-on {
  color: var(--color-info);
}

.pinyin-hint .py-done {
  color: var(--color-ink-faint);
  opacity: 0.5;
}

/* ===== 刷新按钮 ===== */
.refresh-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin: 22px auto 18px;
  border-radius: 10px;
  border: 1px solid var(--color-line);
  background: var(--color-elevated);
  color: var(--color-ink-soft);
  cursor: pointer;
  transition: all 0.2s ease;
}

.refresh-btn:hover {
  color: var(--color-ink);
  border-color: var(--color-line-strong);
  background: var(--color-surface);
}

.refresh-btn svg {
  width: 18px;
  height: 18px;
}

.refresh-btn.is-spinning svg {
  animation: spinRefresh 0.6s linear;
}

@keyframes spinRefresh {
  from {
    transform: rotate(0);
  }
  to {
    transform: rotate(360deg);
  }
}

/* ===== 虚拟键盘 (×1.2 放大) ===== */
.kb-wrap {
  margin: 8px auto 0;
  max-width: 960px;
  padding: 19px;
  border-radius: 16px;
  background: rgb(var(--color-canvas-rgb) / 0.65);
  border: 1px solid var(--color-line);
}

.kb-row {
  display: flex;
  gap: 7px;
  justify-content: center;
  margin-bottom: 7px;
}

.kb-row:last-child {
  margin-bottom: 0;
}

.key {
  position: relative;
  min-width: 53px;
  height: 53px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--color-key-bg);
  border: 1px solid var(--color-line);
  color: var(--color-ink);
  font-size: 18px;
  font-weight: 600;
  line-height: 1;
  user-select: none;
  transition:
    background 0.08s ease,
    border-color 0.08s ease,
    transform 0.08s ease;
}

.key.wide {
  min-width: 77px;
}
.key.xwide {
  min-width: 91px;
}
.key.space {
  min-width: 384px;
}

.key.is-down {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  transform: translateY(1px);
  box-shadow: 0 0 0 3px rgb(var(--color-primary-rgb) / 0.18);
}

.key.is-next {
  border-color: var(--color-primary);
  color: #fff;
  background: rgb(var(--color-primary-rgb) / 0.9);
}

.key.is-wrong {
  border-color: var(--color-danger);
  background: rgb(255 58 92 / 0.16);
  color: var(--color-danger);
}

.key .sub {
  position: absolute;
  bottom: 4px;
  right: 6px;
  font-size: 11px;
  color: var(--color-ink-faint);
  font-weight: 400;
}

.key.shift .glyph,
.key.back .glyph,
.key.tab .glyph,
.key.caps .glyph,
.key.enter .glyph,
.key.ctrl .glyph,
.key.win .glyph,
.key.alt .glyph {
  font-size: 13px;
  font-weight: 500;
}

/* ===== 提示行 ===== */
.typing-hint {
  margin: 14px auto 0;
  max-width: 880px;
  text-align: center;
  font-size: 12px;
  color: var(--color-ink-faint);
  letter-spacing: 0.3px;
}

.typing-hint kbd {
  display: inline-block;
  padding: 1px 6px;
  margin: 0 2px;
  border-radius: 4px;
  background: var(--color-elevated);
  border: 1px solid var(--color-line);
  color: var(--color-ink-soft);
  font-size: 11px;
}

.typing-hint .sep {
  margin: 0 10px;
  color: var(--color-line-strong);
}

/* 浅色主题下提示行对比度增强 */
[data-theme="light"] .typing-hint {
  color: rgba(255, 255, 255, 0.8);
}
[data-theme="light"] .typing-hint kbd {
  color: var(--color-ink);
  background: var(--color-surface);
  border-color: var(--color-line-strong);
}
[data-theme="light"] .typing-hint .sep {
  color: var(--color-ink-soft);
}

/* ===== 音效控制 ===== */
.sound-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin: 12px auto 0;
  max-width: 880px;
}

.sound-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  font-size: 12px;
  line-height: 1;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sound-btn:hover {
  border-color: var(--color-line-strong);
  color: var(--color-ink);
  background: var(--color-elevated);
}

.sound-btn:active {
  transform: translateY(1px);
}

.sound-btn .sound-icon {
  width: 14px;
  height: 14px;
}

.sound-btn.is-active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(var(--color-primary-rgb), 0.1);
}

/* 隐藏的隐藏输入 - 接收真实键盘事件 */
.ghost-input {
  position: fixed;
  top: -1000px;
  left: -1000px;
  opacity: 0;
  pointer-events: none;
  width: 1px;
  height: 1px;
}

/* 打字完成提示 */
.done-toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  z-index: 100;
  padding: 12px 24px;
  background: var(--color-success);
  color: #062013;
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
  opacity: 0;
  pointer-events: none;
  transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.done-toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}