/* 诗词 Wordle —— 宣纸风格样式 */

:root {
  --paper: #f6f1e6;
  --paper-2: #efe7d5;
  --card: #fffdf7;
  --ink: #2e2a24;
  --ink-soft: #6d6455;
  --ink-faint: #9a9184;
  --line: #ddd2b8;
  --line-strong: #c9bb9c;
  --seal: #b23a2f;
  --green: #6a9955;
  --yellow: #cf9a2f;
  --gray: #9c948a;
  --tile-bg: #fffdf7;
  --tile-border: #cfc4aa;
  --tile-border-on: #a89a7c;
  --shadow: 0 2px 0 #d8cdb4;
  --radius: 10px;
}

[data-theme="dark"] {
  --paper: #1b1a18;
  --paper-2: #232119;
  --card: #2a2825;
  --ink: #ece5d6;
  --ink-soft: #a89e8b;
  --ink-faint: #7d7466;
  --line: #3d3a34;
  --line-strong: #55503f;
  --seal: #d4574a;
  --green: #6f9c5c;
  --yellow: #c79a3c;
  --gray: #5f5a52;
  --tile-bg: #302d29;
  --tile-border: #4a463f;
  --tile-border-on: #8c8471;
  --shadow: 0 2px 0 #151412;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  background: var(--paper);
  background-image:
    radial-gradient(circle at 20% 12%, rgba(178, 58, 47, .04), transparent 45%),
    radial-gradient(circle at 82% 78%, rgba(106, 153, 85, .05), transparent 45%);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior-y: contain;
}

.app {
  max-width: 520px;
  margin: 0 auto;
  padding: 0 10px calc(12px + env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

/* ---------- 顶栏 ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 2px 6px;
  gap: 8px;
}

.topbar-side { display: flex; gap: 6px; flex: 1; }
.topbar-side.right { justify-content: flex-end; }

.brand {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .12em;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  font-family: "Songti SC", "STSong", "SimSun", serif;
}

.seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background: var(--seal);
  color: #fff8ef;
  font-size: 15px;
  border-radius: 5px;
  letter-spacing: 0;
  box-shadow: 0 1px 3px rgba(120, 40, 30, .35);
}

.icon-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform .12s, border-color .15s;
}
.icon-btn:active { transform: scale(.92); }
.icon-btn:hover { border-color: var(--tile-border-on); }

/* ---------- 模式条 ---------- */
.modebar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  padding: 4px 0 8px;
  flex-wrap: wrap;
}

.chip-group {
  display: flex;
  gap: 5px;
  padding: 3px;
  border-radius: 999px;
  background: var(--paper-2);
}

.mode-chip {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-soft);
  font-size: 13px;
  padding: 5px 13px;
  border-radius: 999px;
  cursor: pointer;
  font-family: inherit;
  transition: all .15s;
}
.mode-chip.is-on {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
  font-weight: 600;
}

/* ---------- 信息条 ---------- */
.metabar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  font-size: 13px;
  color: var(--ink-soft);
  padding: 2px 0 10px;
  flex-wrap: wrap;
  min-height: 22px;
}
.meta-dot { color: var(--ink-faint); }
.meta-hinttag { color: var(--seal); font-size: 12px; }

/* ---------- 棋盘 ---------- */
.board-wrap {
  display: flex;
  justify-content: center;
  position: relative;
  padding: 2px 0 8px;
}

.board {
  display: grid;
  gap: 5px;
  width: min(96vw, calc(var(--cols, 7) * 54px));
  grid-template-columns: repeat(var(--cols, 7), 1fr);
  perspective: 700px;
}

.tile {
  aspect-ratio: 1 / 1;
  border: 2px solid var(--tile-border);
  background: var(--tile-bg);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Songti SC", "STSong", "SimSun", serif;
  font-size: clamp(17px, 5.6vw, 27px);
  font-weight: 600;
  color: var(--ink);
  user-select: none;
  line-height: 1;
  transition: border-color .12s, transform .1s;
}
.tile.filled { border-color: var(--tile-border-on); animation: pop .09s ease-out; }
.tile.cursor { border-color: var(--seal); border-style: dashed; }

@keyframes pop { 0% { transform: scale(.9); } 100% { transform: scale(1); } }

/* 翻牌：前半程转走，后半程转回并显示结果色 */
.tile.flip-in { animation: flipIn .21s ease-in forwards; }
.tile.flip-out { animation: flipOut .21s ease-out; }
@keyframes flipIn { from { transform: rotateX(0deg); } to { transform: rotateX(90deg); } }
@keyframes flipOut { from { transform: rotateX(90deg); } to { transform: rotateX(0deg); } }

.tile.correct { background: var(--green); border-color: var(--green); color: #fff; }
.tile.present { background: var(--yellow); border-color: var(--yellow); color: #fff; }
.tile.absent  { background: var(--gray); border-color: var(--gray); color: #fff; }
.tile.bounce  { animation: bounce .5s ease; }
@keyframes bounce {
  0%,100% { transform: translateY(0); }
  35%     { transform: translateY(-14px); }
}

.row-shake { animation: shake .38s cubic-bezier(.36,.07,.19,.97); }
@keyframes shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(4px); }
  30%, 50%, 70% { transform: translateX(-6px); }
  40%, 60% { transform: translateX(6px); }
}

/* ---------- toast ---------- */
.toast {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  padding: 7px 14px;
  border-radius: 999px;
  z-index: 30;
  box-shadow: 0 4px 14px rgba(0,0,0,.18);
  animation: toastIn .18s ease-out;
  white-space: nowrap;
}
@keyframes toastIn { from { opacity: 0; transform: translate(-50%, -8px); } to { opacity: 1; } }

/* ---------- 已知信息 / 已用字 ---------- */
.knownbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  padding: 0 6px 8px;
  font-size: 13px;
}
.known-pill {
  background: var(--paper-2);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  border-radius: 999px;
  padding: 3px 11px;
}
.known-pill b { color: var(--ink); font-weight: 600; }

/* ---------- 候选字盘 ---------- */
.keys-tip {
  text-align: center;
  font-size: 11px;
  color: var(--ink-faint);
  padding: 6px 0 0;
  letter-spacing: .04em;
}
.keys-tip:empty { display: none; }

.keys {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(34px, 1fr));
  gap: 5px;
  padding: 10px 2px 2px;
  width: min(96vw, 470px);
  margin: 0 auto;
}

.key {
  aspect-ratio: 1 / 1;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 8px;
  font-family: "Songti SC", "STSong", "SimSun", serif;
  font-size: clamp(15px, 4.2vw, 20px);
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  box-shadow: var(--shadow);
  transition: transform .08s, background .2s, border-color .2s;
  user-select: none;
}
.key:active { transform: translateY(2px); box-shadow: none; }
.key.correct { background: var(--green); border-color: var(--green); color: #fff; }
.key.present { background: var(--yellow); border-color: var(--yellow); color: #fff; }
.key.absent  { background: var(--gray); border-color: var(--gray); color: #fff; opacity: .7; }

/* ---------- 控制按钮 ---------- */
.controls {
  display: flex;
  gap: 6px;
  padding: 8px 2px 4px;
  justify-content: center;
}
.ctl-btn {
  flex: 0 1 auto;
  min-width: 52px;
  padding: 11px 12px;
  font-size: 14px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  font-family: inherit;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform .08s;
}
.ctl-btn:active { transform: translateY(2px); box-shadow: none; }
.ctl-btn.ghost { color: var(--ink-soft); font-size: 13px; padding: 11px 9px; }
.ctl-btn.primary {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
  font-weight: 600;
  flex: 1;
  max-width: 130px;
}

/* ---------- 隐藏输入 ---------- */
#kbInput {
  position: fixed;
  bottom: 0; left: 0;
  width: 1px; height: 1px;
  opacity: 0;
  border: none; padding: 0; margin: 0;
  font-size: 16px;
  z-index: -1;
}

/* ---------- 弹窗 ---------- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(28, 24, 18, .5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 60;
  animation: fade .18s ease-out;
}
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.modal[hidden] { display: none; }

.modal-card {
  background: var(--card);
  border-radius: 16px;
  padding: 22px 20px 18px;
  width: 100%;
  max-width: 400px;
  max-height: 86vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 18px 44px rgba(0,0,0,.28);
  animation: rise .22s ease-out;
}
@keyframes rise { from { transform: translateY(16px); opacity: 0; } to { transform: none; opacity: 1; } }

.modal-card h2 {
  margin: 0 0 10px;
  font-size: 20px;
  font-family: "Songti SC", "STSong", "SimSun", serif;
  letter-spacing: .06em;
}
.modal-card h3 {
  margin: 18px 0 8px;
  font-size: 14px;
  color: var(--ink-soft);
  font-weight: 600;
}
.modal-card p { font-size: 14px; line-height: 1.75; color: var(--ink-soft); margin: 0 0 10px; }
.modal-card p.lead { color: var(--ink); }
.modal-card strong { color: var(--seal); }

.modal-close {
  position: absolute;
  top: 12px; right: 12px;
  width: 30px; height: 30px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
}

.demo { margin: 12px 0 4px; }
.demo-row { display: flex; gap: 6px; margin-bottom: 12px; }
.demo-row .tile { width: 42px; height: 42px; aspect-ratio: auto; font-size: 19px; }
.demo-list { list-style: none; padding: 0; margin: 0; }
.demo-list li {
  display: flex; align-items: center; gap: 9px;
  font-size: 13px; color: var(--ink-soft); margin-bottom: 8px;
}
.demo-list .tile { width: 28px; height: 28px; aspect-ratio: auto; font-size: 15px; flex: none; }

.rules {
  border-top: 1px dashed var(--line);
  margin-top: 12px;
  padding-top: 12px;
}
.rules p { font-size: 13px; }
.rules b { color: var(--ink); }

.big-btn {
  width: 100%;
  padding: 13px;
  border-radius: 11px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  margin-top: 6px;
}
.big-btn.ghost { background: transparent; color: var(--ink-soft); border-color: var(--line); }
.big-btn:active { transform: translateY(1px); }

/* 统计 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 4px;
}
.stat-cell {
  text-align: center;
  background: var(--paper-2);
  border-radius: 10px;
  padding: 10px 4px;
}
.stat-num { font-size: 21px; font-weight: 700; color: var(--ink); line-height: 1.2; }
.stat-lab { font-size: 11px; color: var(--ink-faint); margin-top: 3px; }

.dist { display: flex; flex-direction: column; gap: 5px; }
.dist-row { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--ink-soft); }
.dist-num { width: 14px; text-align: right; color: var(--ink-faint); }
.dist-bar {
  flex: 1;
  height: 18px;
  background: var(--paper-2);
  border-radius: 4px;
  overflow: hidden;
}
.dist-fill {
  height: 100%;
  background: var(--green);
  border-radius: 4px;
  min-width: 2px;
  color: #fff;
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 5px;
  transition: width .4s ease;
}

/* 图片提示 */
.image-card { max-width: 560px; padding: 16px; }
.hint-image-wrap img {
  width: 100%;
  display: block;
  border-radius: 12px;
  background: var(--paper-2);
  min-height: 120px;
}
.image-note {
  text-align: center;
  font-size: 12px;
  color: var(--ink-faint);
  padding-top: 9px;
}

/* 结果 */
.result-poem {
  font-family: "Songti SC", "STSong", "SimSun", serif;
  font-size: 17px;
  line-height: 2;
  text-align: center;
  color: var(--ink);
  background: var(--paper-2);
  border-radius: 12px;
  padding: 14px 10px;
  margin: 10px 0 8px;
}
.result-poem .hit { color: var(--seal); font-weight: 700; }
.result-src { text-align: center; font-size: 13px; color: var(--ink-soft); }
.result-note { text-align: center; font-size: 12px; color: var(--ink-faint); margin: 4px 0 12px; min-height: 18px; }
.result-btns { display: flex; gap: 8px; }
.result-btns .big-btn { margin-top: 0; }

@media (max-width: 380px) {
  .brand { font-size: 17px; }
  .ctl-btn { padding: 10px 8px; font-size: 13px; }
  .ctl-btn.ghost { padding: 10px 7px; font-size: 12px; }
}