/* 数字一笔 · Web 壳样式。令牌与组件规格见仓库 docs/design.md（改令牌先改文档，再同步 src/theme.ts）。 */

:root {
  /* ---- 颜色 ---- */
  --bg: #ffffff;
  --bg-app: #f2f2f6;
  --surface-2: #f3f3f7;
  --cell: #e6e7ec;
  --line: #e1e2ea;
  --ink: #23243a;
  --ink-2: #6b6d80;
  --ink-3: #a3a5b5;
  --primary: #6558f5;
  --primary-bright: #7d72ff;
  --primary-soft: #eceafe;
  --on-primary: #ffffff;
  --danger: #e5484d;
  --danger-soft: #fdecec;
  --hint: #f5a524;
  --hint-soft: #fef3dd;
  --clue-ring: #23243a;
  --overlay: rgba(35, 36, 58, 0.92);
  --shadow-primary: 0 6px 18px rgba(101, 88, 245, 0.28);
  --shadow-primary-pressed: 0 3px 10px rgba(101, 88, 245, 0.22);
  --shadow-frame: 0 20px 60px rgba(20, 20, 40, 0.14);

  /* ---- 字体 ---- */
  --font: ui-rounded, "SF Pro Rounded", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --fs-display: 34px;
  --fs-title: 22px;
  --fs-heading: 17px;
  --fs-body: 15px;
  --fs-label: 14px;
  --fs-caption: 13px;
  --fs-micro: 12px;

  /* ---- 圆角 ---- */
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 18px;
  --r-xl: 24px;
  --r-pill: 999px;

  /* ---- 间距（4pt 网格） ---- */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-7: 28px;

  /* ---- 动效 ---- */
  --t-fast: 120ms;
  --t-base: 200ms;
  --t-slow: 320ms;
  --t-hold: 500ms;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ---- 尺寸 ---- */
  --tap: 44px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

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

html,
body {
  margin: 0;
  height: 100%;
  background: var(--bg-app);
  color: var(--ink);
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: 1.3;
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  overscroll-behavior: none;
}

#app {
  position: relative;
  margin: 0 auto;
  width: 100%;
  max-width: 480px;
  height: 100vh;
  height: 100dvh;
  background: var(--bg);
  overflow: hidden;
}

.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  padding: calc(var(--safe-top) + var(--sp-3)) calc(var(--safe-right) + var(--sp-5)) calc(var(--safe-bottom) + var(--sp-4))
    calc(var(--safe-left) + var(--sp-5));
}

.screen.hidden {
  display: none;
}

.screen.enter {
  animation: screen-in var(--t-base) var(--ease-out) both;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  -webkit-touch-callout: none;
  transition: transform var(--t-fast) var(--ease-out), background-color var(--t-fast) var(--ease-out),
    box-shadow var(--t-fast) var(--ease-out), opacity var(--t-fast) var(--ease-out);
}

button:active {
  transform: scale(0.97);
}

button:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

/* ---------- 选关 ---------- */

.select-header {
  padding: var(--sp-7) var(--sp-1) var(--sp-2);
}

.select-header h1 {
  margin: 0;
  font-size: var(--fs-display);
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.15;
}

.select-header .sub {
  margin: var(--sp-2) 0 0;
  color: var(--ink-2);
  font-size: var(--fs-body);
  font-weight: 500;
}

.overall {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-top: var(--sp-4);
}

.overall-bar {
  flex: 1;
  height: 6px;
  border-radius: var(--r-pill);
  background: var(--cell);
  overflow: hidden;
}

.overall-bar i {
  display: block;
  height: 100%;
  width: 0;
  border-radius: var(--r-pill);
  background: var(--primary);
  transition: width var(--t-slow) var(--ease-out);
}

.overall-text {
  color: var(--ink-3);
  font-size: var(--fs-caption);
  font-weight: 600;
  min-width: 52px;
  text-align: right;
}

.pack-list {
  flex: 1;
  overflow-y: auto;
  margin-top: var(--sp-3);
  padding-bottom: var(--sp-5);
  /* 继续按钮固定在底部，包列表自己滚；底部 20px 渐隐，避免被按钮“切断” */
  min-height: 0;
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 12px, #000 calc(100% - 20px), transparent);
  mask-image: linear-gradient(to bottom, transparent, #000 12px, #000 calc(100% - 20px), transparent);
}

.pack {
  margin-top: var(--sp-7);
}

.pack-list > .pack:first-child {
  margin-top: var(--sp-2);
}

.pack-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 0 var(--sp-1) var(--sp-3);
  font-size: var(--fs-heading);
  font-weight: 700;
}

.pack-progress {
  color: var(--ink-3);
  font-size: var(--fs-label);
  font-weight: 600;
}

.pack.done .pack-progress {
  color: var(--primary);
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--sp-3);
}

.level-tile {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--r-md);
  background: var(--cell);
  color: var(--ink);
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.level-tile:active {
  transform: scale(0.94);
}

.level-tile.cleared {
  background: var(--primary);
  color: var(--on-primary);
}

/* 已过关：右上角一个小勾（纯 CSS 画，不依赖字体里的 ✓） */
.level-tile.cleared::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 6px;
  width: 4px;
  height: 8px;
  border: solid rgba(255, 255, 255, 0.9);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.level-tile.current {
  box-shadow: inset 0 0 0 3px var(--primary);
  background: var(--primary-soft);
  color: var(--primary);
  animation: breathe 2.4s var(--ease-in-out) infinite;
}

.level-tile.locked {
  color: var(--ink-3);
  background: var(--surface-2);
}

.level-tile.locked::before {
  content: "";
  width: 10px;
  height: 12px;
  border: 2px solid var(--ink-3);
  border-radius: 3px;
  border-top-width: 3px;
}

.level-tile.locked span {
  display: none;
}

.level-tile.shake {
  animation: shake var(--t-slow) var(--ease-out);
}

.primary {
  margin-top: auto;
  height: 54px;
  border-radius: var(--r-lg);
  background: var(--primary);
  color: var(--on-primary);
  font-size: var(--fs-heading);
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow: var(--shadow-primary);
}

.primary:active {
  transform: scale(0.98);
  box-shadow: var(--shadow-primary-pressed);
}

.select-footer {
  display: flex;
  justify-content: center;
  gap: var(--sp-2);
  padding-top: var(--sp-4);
}

.chip {
  height: 34px;
  padding: 0 var(--sp-4);
  border-radius: var(--r-pill);
  background: var(--surface-2);
  color: var(--ink-2);
  font-size: var(--fs-caption);
  font-weight: 600;
}

.chip.on {
  background: var(--primary-soft);
  color: var(--primary);
}

.chip.danger {
  color: var(--danger);
}

/* ---------- 对局 ---------- */

.topbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 52px;
}

.topbar .icon {
  justify-self: start;
  width: var(--tap);
  height: var(--tap);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-2);
  border-radius: var(--r-pill);
  margin-left: -8px;
}

.topbar .icon:active {
  background: var(--surface-2);
}

.level-info {
  text-align: center;
  line-height: 1.1;
}

.level-title {
  font-size: var(--fs-title);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.level-sub {
  margin-top: 3px;
  color: var(--ink-3);
  font-size: var(--fs-micro);
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.remaining {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 32px;
  padding: 0 var(--sp-3) 0 10px;
  border-radius: var(--r-pill);
  background: var(--surface-2);
  color: var(--ink-2);
  font-size: var(--fs-label);
  font-weight: 700;
  min-width: 52px;
  justify-content: center;
  transition: background-color var(--t-base) var(--ease-out), color var(--t-base) var(--ease-out);
}

.remaining-icon {
  color: var(--ink-3);
  transition: color var(--t-base) var(--ease-out);
}

.remaining-icon.check {
  display: none;
}

.remaining.bump {
  animation: bump var(--t-base) var(--ease-spring);
}

.remaining.done {
  background: var(--primary-soft);
  color: var(--primary);
}

.remaining.done .remaining-icon {
  color: var(--primary);
}

.remaining.done .remaining-icon.tile {
  display: none;
}

.remaining.done .remaining-icon.check {
  display: block;
}

/* 本包进度条：每关一段。灰 = 未到，淡紫 = 已过，实紫 = 当前 */
.level-progress {
  display: flex;
  gap: 3px;
  height: 4px;
  margin: var(--sp-2) var(--sp-1) 0;
}

.level-progress i {
  flex: 1;
  border-radius: 2px;
  background: var(--cell);
  transition: background-color var(--t-slow) var(--ease-out), opacity var(--t-slow) var(--ease-out);
}

.level-progress i.cleared {
  background: var(--primary);
  opacity: 0.4;
}

.level-progress i.current {
  background: var(--primary);
  opacity: 1;
}

.caption {
  height: 36px;
  margin-top: var(--sp-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-2);
  font-size: var(--fs-body);
  font-weight: 500;
  text-align: center;
  transition: opacity var(--t-base) var(--ease-out);
}

.caption:empty {
  opacity: 0;
}

.board-wrap {
  flex: 1;
  min-height: 0;
  position: relative;
}

#board {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  display: block;
}

.bottombar {
  display: flex;
  justify-content: center;
  gap: var(--sp-3);
  padding-top: var(--sp-3);
}

.gesture-help {
  margin: 0;
  padding-top: var(--sp-2);
  color: var(--ink-2);
  font-size: var(--fs-caption);
  text-align: center;
}

.action {
  flex: 1;
  max-width: 170px;
  height: 56px;
  border-radius: var(--r-lg);
  background: var(--surface-2);
  color: var(--ink);
  font-size: var(--fs-body);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-1);
}

.action svg {
  color: var(--ink-2);
}

.action:active {
  background: var(--cell);
}

.action.pulse {
  animation: pulse 0.9s var(--ease-in-out) infinite;
}

.action:disabled {
  opacity: 0.4;
  pointer-events: none;
}

.toast {
  position: absolute;
  left: 50%;
  bottom: calc(var(--safe-bottom) + 128px);
  transform: translate(-50%, 8px);
  padding: 10px var(--sp-4);
  border-radius: var(--r-md);
  background: var(--overlay);
  color: #fff;
  font-size: var(--fs-label);
  font-weight: 600;
  width: max-content;
  max-width: calc(100% - 40px);
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base) var(--ease-out), transform var(--t-base) var(--ease-out);
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ---------- 动效 ---------- */

@keyframes screen-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-5px);
  }
  50% {
    transform: translateX(5px);
  }
  75% {
    transform: translateX(-3px);
  }
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(245, 165, 36, 0);
  }
  50% {
    box-shadow: 0 0 0 5px rgba(245, 165, 36, 0.35);
  }
}

@keyframes bump {
  0% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.14);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes breathe {
  0%,
  100% {
    box-shadow: inset 0 0 0 3px var(--primary), 0 0 0 0 rgba(101, 88, 245, 0);
  }
  50% {
    box-shadow: inset 0 0 0 3px var(--primary), 0 0 0 6px rgba(101, 88, 245, 0.16);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

@media (min-width: 520px) {
  body {
    padding: var(--sp-6) 0;
  }
  #app {
    height: calc(100vh - 48px);
    height: calc(100dvh - 48px);
    border-radius: 28px;
    box-shadow: var(--shadow-frame);
  }
}