/* ============================================================
   打字练习 · 独立暗色街机风样式
   - 不依赖 ../assets/style.css 的全站令牌，全部使用本文件局部变量
   - 变量挂在 .typing-app 上，不污染全站
   - 传送带流水：.ty-card 的 left 从 100% 动画到 -120%
   - prefers-reduced-motion: reduce 时改为静态居中切换（动画仍在跑，
     只用于计时，视觉上不流动）——见文件末尾 @media 块
   ============================================================ */

/* ---------- 最小 reset（本页自用，避免依赖全站 reset） ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
h1, h2, h3, p { margin: 0; }
[hidden] { display: none !important; }

/* ---------- 局部设计令牌 ---------- */
.typing-app {
  --ty-bg:        #070a12;
  --ty-bg-2:      #0d1322;
  --ty-panel:     #131b2c;
  --ty-panel-2:   #1a2438;
  --ty-line:      #26314a;
  --ty-fg:        #e9eefc;
  --ty-muted:     #8491ab;
  --ty-accent:    #35e0c8;   /* 荧光青：主强调 */
  --ty-accent-2:  #ff5c8a;   /* 霓虹粉：连击 / 出错 */
  --ty-good:      #7df0a9;   /* 已敲对 */
  --ty-warn:      #ffd166;   /* 倒数告警 */
  --ty-line-2:    #3d4d70;   /* hover 边框 */
  --ty-bg-3:      #0a1120;   /* 题面底 */
  --ty-bg-4:      #0e1729;
  --ty-glow-1:    #14253f;   /* 背景光晕 1 */
  --ty-glow-2:    #1d1430;   /* 背景光晕 2 */
  --ty-accent-lite:#3ef0d6;  /* 主按钮渐变亮端 */
  --ty-accent-deep:#1fc4ad;  /* 主按钮渐变深端 */
  --ty-on-accent: #04231e;   /* 青底上的字 */
  --ty-accent-2-lite:#ff6f97;
  --ty-accent-2-deep:#e13c67;
  --ty-on-accent-2:#2a0412;  /* 粉底上的字 */
  --ty-ink-strong:#ffffff;   /* 词形主视觉 */
  --ty-muted-2:   #8493b5;   /* 假名残字 */
  --ty-radius:    14px;
  --ty-flow-ms:   8000ms;    /* 传送带单程时长；由 JS 按难度档改写（档越高越小 = 越快） */

  min-height: 100vh;
  padding: 18px clamp(14px, 4vw, 40px) 40px;
  background:
    radial-gradient(1100px 620px at 78% -12%, var(--ty-glow-1) 0%, transparent 62%),
    radial-gradient(900px 520px at 8% 108%, var(--ty-glow-2) 0%, transparent 60%),
    var(--ty-bg);
  color: var(--ty-fg);
  font-family: system-ui, -apple-system, "Segoe UI", "Yu Gothic UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.typing-app ::selection { background: rgba(53, 224, 200, .32); }

/* ---------- 顶部返回门户 ---------- */
.ty-crumb {
  max-width: 960px;
  margin: 0 auto 14px;
  font-size: 13px;
  color: var(--ty-muted);
  letter-spacing: .02em;
}
.ty-crumb a { color: var(--ty-accent); text-decoration: none; }
.ty-crumb a:hover { text-decoration: underline; }
.ty-crumb-sep { margin: 0 8px; opacity: .6; }

/* ---------- 屏幕通用 ---------- */
.ty-screen {
  max-width: 960px;
  margin: 0 auto;
  animation: ty-fade .28s ease both;
}
@keyframes ty-fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* ============ 开始 / 选档屏 ============ */
.ty-start { padding: 28px 0 0; }
.ty-eyebrow {
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  letter-spacing: .34em;
  color: var(--ty-accent);
  margin-bottom: 6px;
}
.ty-title {
  font-size: clamp(30px, 6vw, 46px);
  font-weight: 800;
  letter-spacing: .06em;
  text-shadow: 0 0 26px rgba(53, 224, 200, .28);
}
.ty-lead { color: var(--ty-muted); font-size: 14px; margin-top: 8px; max-width: 60ch; }

.ty-field { margin-top: 26px; }
.ty-field-label {
  display: block;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--ty-muted);
  margin-bottom: 10px;
  text-transform: uppercase;
}
.ty-opts { display: flex; flex-wrap: wrap; gap: 10px; }
.ty-opt {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 132px;
  padding: 12px 16px;
  border: 1px solid var(--ty-line);
  border-radius: var(--ty-radius);
  background: linear-gradient(180deg, var(--ty-panel), var(--ty-bg-2));
  color: var(--ty-fg);
  font-size: 16px;
  font-weight: 700;
  text-align: left;
  transition: border-color .15s, box-shadow .15s, transform .1s;
}
.ty-opt-sub { font-size: 11px; font-weight: 400; color: var(--ty-muted); letter-spacing: .02em; }
.ty-opt:hover { border-color: var(--ty-line-2); transform: translateY(-1px); }
.ty-opt.is-active {
  border-color: var(--ty-accent);
  box-shadow: inset 0 0 0 1px rgba(53, 224, 200, .35), 0 0 22px rgba(53, 224, 200, .18);
}
.ty-opt.is-active .ty-opt-sub { color: var(--ty-accent); }

.ty-best { margin-top: 24px; font-size: 13px; color: var(--ty-muted); }
.ty-best strong { color: var(--ty-warn); }

.ty-hint { margin-top: 12px; font-size: 12px; color: var(--ty-muted); }
.ty-hint.is-error { color: var(--ty-accent-2); }

/* ---------- 按钮 ---------- */
.ty-btn {
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid var(--ty-line);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  transition: border-color .15s, background .15s, transform .1s, box-shadow .15s;
}
.ty-btn:hover { transform: translateY(-1px); }
.ty-btn:active { transform: translateY(0); }
.ty-btn-primary {
  margin-top: 26px;
  background: linear-gradient(180deg, var(--ty-accent-lite), var(--ty-accent-deep));
  border-color: transparent;
  color: var(--ty-on-accent);
  box-shadow: 0 6px 26px rgba(53, 224, 200, .3);
}
.ty-btn-primary:hover { box-shadow: 0 8px 32px rgba(53, 224, 200, .42); }
.ty-btn-ghost { background: rgba(255, 255, 255, .03); color: var(--ty-fg); }
.ty-btn-ghost:hover { border-color: var(--ty-line-2); }
.ty-btn-danger { background: linear-gradient(180deg, var(--ty-accent-2-lite), var(--ty-accent-2-deep)); border-color: transparent; color: var(--ty-on-accent-2); }
.ty-btn-lg { padding: 13px 34px; font-size: 16px; }

/* 键盘可达：焦点环清晰可见 */
.ty-btn:focus-visible,
.ty-opt:focus-visible,
.ty-crumb a:focus-visible {
  outline: 2px solid var(--ty-accent);
  outline-offset: 2px;
}

/* ---------- 移动端隐藏软键盘输入框 ---------- */
/* 关键：不能用 display:none（iOS 下 display:none 的元素无法 focus）；
   用 opacity:0 + 固定到视口角落 + 1px 尺寸，仍保持可聚焦；
   font-size ≥ 16px 以避免 iOS 聚焦时自动放大页面。 */
.ty-mobile-input {
  position: fixed;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  padding: 0;
  border: 0;
  opacity: 0;
  font-size: 16px;
  color: transparent;
  background: transparent;
  caret-color: transparent;
  pointer-events: none;
  z-index: -1;
}

/* ============ 游戏台 ============ */
.ty-game { padding-top: 6px; }

.ty-hud {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  padding: 12px 16px;
  border: 1px solid var(--ty-line);
  border-radius: var(--ty-radius);
  background: linear-gradient(180deg, rgba(26, 36, 56, .9), rgba(13, 19, 34, .9));
}
.ty-hud-item { display: flex; flex-direction: column; line-height: 1.25; }
.ty-hud-k { font-size: 10px; letter-spacing: .2em; color: var(--ty-muted); }
.ty-hud-v { font-size: 20px; font-weight: 800; font-variant-numeric: tabular-nums; }
.ty-hud-score { color: var(--ty-accent); }
.ty-hud-time.is-warn { color: var(--ty-warn); animation: ty-blink .6s steps(2, end) infinite; }
@keyframes ty-blink { 50% { opacity: .35; } }
.ty-hud-actions { margin-left: auto; display: flex; gap: 8px; }

/* 传送带 */
.ty-stage { position: relative; margin-top: 16px; }
.ty-lane {
  position: relative;
  overflow: hidden;
  min-height: clamp(230px, 34vh, 300px);
  border: 1px solid var(--ty-line);
  border-radius: 18px;
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, .028) 0 2px, transparent 2px 34px),
    linear-gradient(180deg, var(--ty-bg-3), var(--ty-bg-4) 60%, var(--ty-bg-3));
}
/* 传送带上下轨 */
.ty-lane::before, .ty-lane::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(53, 224, 200, .35), transparent);
}
.ty-lane::before { top: 14px; }
.ty-lane::after { bottom: 14px; }

/* 当前词卡片：同一时刻一个词从右向左流过 */
.ty-card {
  position: absolute;
  top: 50%;
  left: 100%;
  transform: translateY(-50%);
  width: max-content;
  max-width: min(680px, 88%);
  padding: 18px 26px 20px;
  border: 1px solid rgba(53, 224, 200, .38);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(23, 34, 55, .96), rgba(12, 19, 34, .96));
  box-shadow: 0 0 0 1px rgba(0, 0, 0, .4), 0 18px 44px rgba(0, 0, 0, .5), 0 0 30px rgba(53, 224, 200, .1);
  text-align: center;
  /* 单程时长由 --ty-flow-ms 控制（JS 按难度档改写） */
  animation: ty-flow var(--ty-flow-ms, 8000ms) linear forwards;
}
/* 传送带流水：从右侧界外进入，流到左侧界外 */
@keyframes ty-flow {
  from { left: 100%; }
  to   { left: -120%; }
}
.ty-card.ty-wrong {
  border-color: var(--ty-accent-2);
  box-shadow: 0 0 0 1px rgba(255, 92, 138, .5), 0 0 34px rgba(255, 92, 138, .4);
}
.ty-stage.ty-paused .ty-card { animation-play-state: paused; }

/* 三行展示层（同屏常显）：词形 ruby / 罗马字 / 释义 */
.ty-line { white-space: nowrap; }
/* 词形主视觉：汉字 / 词最大 */
.ty-line-word {
  font-size: clamp(30px, 6vw, 44px);
  font-weight: 800;
  letter-spacing: .1em;
  color: var(--ty-ink-strong);
  text-shadow: 0 0 20px rgba(53, 224, 200, .35);
}
/* 假名作为 ruby 标注：小一号，居上方，不抢主视觉 */
.ty-line-word ruby { ruby-position: over; }
.ty-line-word rt {
  font-size: clamp(12px, 2.4vw, 15px);
  font-weight: 400;
  letter-spacing: .06em;
  color: var(--ty-muted);
  text-shadow: none;
}
.ty-line-romaji {
  margin-top: 10px;
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Courier New", monospace;
  font-size: clamp(17px, 3.4vw, 22px);
  letter-spacing: .06em;
}
.ty-romaji .ty-hit { color: var(--ty-good); text-shadow: 0 0 14px rgba(125, 240, 169, .5); }
.ty-romaji .ty-rest { color: var(--ty-muted-2); }
.ty-echo {
  margin-left: 12px;
  color: var(--ty-accent);
  font-size: .82em;
  opacity: .9;
}
.ty-echo::before { content: "▸ "; opacity: .55; }
.ty-line-mean { margin-top: 8px; font-size: 14px; color: var(--ty-muted); }

.ty-paused-note {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .3em;
  color: var(--ty-accent);
  background: rgba(7, 10, 18, .72);
  border-radius: 18px;
}
.ty-tip { margin-top: 14px; font-size: 12px; color: var(--ty-muted); text-align: center; }

/* ============ 结算屏 ============ */
.ty-over { padding-top: 30px; text-align: center; }
.ty-over-title { font-size: 26px; font-weight: 800; letter-spacing: .1em; }
.ty-record {
  display: inline-block;
  margin-top: 10px;
  padding: 4px 14px;
  border-radius: 999px;
  background: rgba(255, 209, 102, .14);
  border: 1px solid rgba(255, 209, 102, .5);
  color: var(--ty-warn);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
}
.ty-stats {
  margin: 22px auto 0;
  max-width: 520px;
  border: 1px solid var(--ty-line);
  border-radius: var(--ty-radius);
  overflow: hidden;
  text-align: left;
}
.ty-stat {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 18px;
  font-size: 14px;
  border-top: 1px solid var(--ty-line);
}
.ty-stat:first-child { border-top: 0; }
.ty-stat-k { color: var(--ty-muted); }
.ty-stat-v { font-weight: 800; font-variant-numeric: tabular-nums; }
.ty-stat.ty-stat-lead { background: rgba(53, 224, 200, .07); }
.ty-stat.ty-stat-lead .ty-stat-v { color: var(--ty-accent); font-size: 18px; }
.ty-over-actions { margin-top: 26px; display: flex; gap: 12px; justify-content: center; }
.ty-over-actions .ty-btn-primary { margin-top: 0; }

/* ============ 退出二次确认 ============ */
.ty-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(4, 7, 13, .74);
  backdrop-filter: blur(3px);
}
.ty-modal-box {
  width: min(420px, 100%);
  padding: 24px;
  border: 1px solid var(--ty-line);
  border-radius: 16px;
  background: linear-gradient(180deg, var(--ty-panel-2), var(--ty-bg-2));
  box-shadow: 0 24px 70px rgba(0, 0, 0, .6);
}
.ty-modal-text { font-size: 15px; }
.ty-modal-actions { margin-top: 20px; display: flex; gap: 10px; justify-content: flex-end; }

/* ============================================================
   无障碍：prefers-reduced-motion 下取消流动动画
   - 卡片改为静态居中；动画仍按同一时长「跑」到结束，
     用于驱动「词流出界」的计时，只是视觉上不移动 = 静态切换词
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .ty-card {
    left: 50%;
    transform: translate(-50%, -50%);
    animation-name: ty-flow-static;
  }
  @keyframes ty-flow-static {
    from { left: 50%; }
    to   { left: 50%; }
  }
  .ty-screen { animation: none; }
  .ty-hud-time.is-warn { animation: none; }
  .ty-btn:hover, .ty-opt:hover { transform: none; }
}


/* ============================================================
   选中态：难度档是「量表」而非并列选项，用从左到右的填充暗示 N5 易 → N1 难。
   其余选项组保持原样（模式 / 速度是真正的并列选项）。
   ============================================================ */
.ty-opts-scale .ty-opt {
  position: relative;
  overflow: hidden;
}
.ty-opts-scale .ty-opt::before {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: var(--ty-line);
  transition: height .18s ease, background .18s ease;
}
.ty-opts-scale .ty-opt.is-active::before {
  height: 3px;
  background: var(--ty-accent);
}
.ty-field-note {
  margin-left: 8px;
  font-size: 11px;
  letter-spacing: .04em;
  text-transform: none;
  color: var(--ty-muted);
  /* 不叠 opacity：叠加后对比度会掉到 4.27:1，低于 AA 4.5:1 */
}

/* 只在视觉上保留读音提示的对照层级：罗马音已敲对部分足够亮，
   未敲部分降到不抢主视觉。此规则只影响色值，不改字号。 */

/* ============================================================
   无障碍：live region 与「跳过装饰」工具类
   ============================================================ */
.ty-sr {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 窄屏 ---------- */
@media (max-width: 560px) {
  .typing-app { padding: 14px 14px 28px; }
  .ty-hud { gap: 8px 14px; padding: 10px 12px; }
  .ty-hud-v { font-size: 17px; }
  .ty-hud-actions { width: 100%; margin-left: 0; }
  .ty-card { padding: 14px 18px 16px; max-width: 92%; }

  /* 选档屏压缩：小屏上原本 5 个档位会折成 3 行，开始按钮被挤到屏幕外。
     改用等分网格 + 收敛纵向留白，让首屏能同时看到选项与开始按钮。 */
  .ty-start { padding-top: 16px; }
  .ty-title { font-size: clamp(26px, 8vw, 34px); }
  .ty-lead { margin-top: 6px; }
  .ty-field { margin-top: 18px; }
  .ty-field-label { margin-bottom: 8px; }
  .ty-opts {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }
  .ty-opt {
    min-width: 0;            /* 网格下让列宽说话，避免 min-width 撑破一行 */
    padding: 9px 10px;
    font-size: 15px;
    gap: 1px;
  }
  .ty-opt-sub { font-size: 10px; }
  .ty-best { margin-top: 16px; }
  .ty-hint { margin-top: 8px; }

  /* 开始按钮吸底：即使档位区再长，主操作也不会被推到屏幕外 */
  .ty-start { padding-bottom: 8px; }
  #btn-start {
    position: sticky;
    bottom: 8px;
    width: 100%;
    margin-top: 18px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .55), 0 6px 26px rgba(53, 224, 200, .3);
  }
}