/* Shared look for 小不的趣味屋 practice apps: warm paper page, big round buttons, gentle feedback. */
:root {
  color-scheme: light;
  --page: #fbf8f3; --ink: #342e2f; --muted: #746e6b; --accent: #9d514f;
  --line: #e6ddd4; --soft: #ffebdf; --paper: #ffffff;
  --good: #2f8a5b; --good-soft: #e3f4ea; --warn: #c98a1d; --warn-soft: #fff3d6;
  --blue: #3466a8; --blue-soft: #e5eefa; --pink: #b04a63; --pink-soft: #fbe5ea;
  --ui: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --kai: "Kaiti SC", "STKaiti", "KaiTi", "楷体", "PingFang SC", serif;
  font-family: var(--ui); color: var(--ink); background: var(--page);
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; min-height: 100%; background: var(--page); }
body { overscroll-behavior: none; }
button { font: inherit; color: inherit; cursor: pointer; -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
button:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.shell { max-width: 760px; margin: 0 auto; padding-block: 16px 40px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); display: flex; flex-direction: column; gap: 14px; }

/* Header */
.k-top { display: flex; align-items: center; gap: 10px; }
.k-title { flex: 1; display: flex; align-items: center; gap: 8px; margin: 0; font-size: clamp(20px, 5vw, 28px); font-weight: 900; letter-spacing: -.02em; min-width: 0; }
.k-title span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.k-back, .k-pill { display: inline-flex; align-items: center; gap: 4px; min-height: 40px; padding: 6px 13px; border: 0; border-radius: 99px; background: var(--soft); color: var(--ink); font-size: 14px; font-weight: 800; text-decoration: none; white-space: nowrap; }
.k-stars { background: var(--warn-soft); color: #8a5a00; font-variant-numeric: tabular-nums; }
.k-stars.bump { animation: bump .5s; }
@keyframes bump { 40% { transform: scale(1.25); } }

/* Tabs / mode chips */
.k-tabs { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 2px; scrollbar-width: none; }
.k-tabs::-webkit-scrollbar { display: none; }
.k-tab { flex: none; min-height: 52px; padding: 8px 16px; border: 2px solid var(--line); border-radius: 18px; background: var(--paper); font-size: 16px; font-weight: 800; color: var(--muted); }
.k-tab[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--page); }

/* Cards and buttons */
.k-card { position: relative; padding: 18px 16px 20px; border-radius: 26px; background: var(--paper); border: 1px solid var(--line); box-shadow: 0 6px 0 var(--line); }
.k-card.shake, .shake { animation: shake .45s; }
@keyframes shake { 20%, 60% { transform: translateX(-8px); } 40%, 80% { transform: translateX(8px); } }
.k-q { display: flex; align-items: center; justify-content: center; gap: 10px; margin: 0 0 14px; font-size: clamp(19px, 5vw, 24px); font-weight: 900; text-align: center; line-height: 1.4; }
.k-say { flex: none; width: 48px; height: 48px; border: 0; border-radius: 50%; background: var(--blue-soft); font-size: 24px; }
.k-btn { min-height: 64px; min-width: 64px; padding: 10px 18px; border: 0; border-radius: 20px; background: var(--paper); box-shadow: inset 0 0 0 2px var(--line), 0 5px 0 var(--line); font-size: 22px; font-weight: 900; transition: transform .1s; }
.k-btn:active { transform: translateY(3px); box-shadow: inset 0 0 0 2px var(--line), 0 2px 0 var(--line); }
.k-btn.primary { background: var(--accent); color: #fff; box-shadow: 0 5px 0 #6e3634; }
.k-btn.good { background: var(--good-soft); box-shadow: inset 0 0 0 3px var(--good), 0 5px 0 #9fd0b3; }
.k-btn.hint { background: var(--warn-soft); box-shadow: inset 0 0 0 3px var(--warn), 0 5px 0 #ecd29a; }
.k-btn:disabled { opacity: .45; }
.k-choices { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 12px; }
.k-row { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }

/* Progress dots */
.k-progress { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; }
.k-progress i { width: 14px; height: 14px; border-radius: 50%; background: var(--line); }
.k-progress i.done { background: var(--good); }
.k-progress i.now { background: var(--warn); transform: scale(1.2); }

/* Feedback toast */
.k-toast { position: fixed; left: 50%; top: 38%; z-index: 40; transform: translate(-50%, -50%); padding: 14px 26px; border-radius: 24px; background: var(--paper); box-shadow: 0 10px 30px rgba(52, 46, 47, .18); font-size: 28px; font-weight: 900; pointer-events: none; animation: toast 1.1s ease-out forwards; white-space: nowrap; }
.k-toast.good { color: var(--good); }
.k-toast.soft { color: var(--warn); }
@keyframes toast { 0% { opacity: 0; transform: translate(-50%, -30%) scale(.8); } 15% { opacity: 1; transform: translate(-50%, -50%) scale(1.05); } 75% { opacity: 1; } 100% { opacity: 0; transform: translate(-50%, -70%); } }
.k-fly { position: fixed; z-index: 41; font-size: 30px; pointer-events: none; transition: transform .8s cubic-bezier(.5, -.3, .7, 1), opacity .8s; }
.k-confetti { position: fixed; z-index: 39; top: -20px; width: 10px; height: 14px; border-radius: 3px; pointer-events: none; animation: fall linear forwards; }
@keyframes fall { to { transform: translateY(110vh) rotate(720deg); } }

/* Modal */
.k-modal { position: fixed; inset: 0; z-index: 50; display: flex; align-items: center; justify-content: center; padding: 16px; background: rgba(52, 46, 47, .4); }
.k-sheet { width: min(560px, 100%); max-height: calc(100vh - 32px); overflow: auto; padding: 22px 18px; border-radius: 28px; background: var(--paper); text-align: center; animation: pop .3s both; }
@keyframes pop { from { opacity: 0; transform: scale(.9); } }
.k-sheet h2 { margin: 6px 0 10px; font-size: 26px; }
.k-sheet p { margin: 6px 0; color: var(--muted); line-height: 1.6; }
.k-big-emoji { font-size: 64px; line-height: 1.1; }
.k-sheet .k-row { margin-top: 16px; }
.k-stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 12px 0; }
.k-stat-grid div { padding: 10px 4px; border-radius: 16px; background: var(--page); }
.k-stat-grid b { display: block; font-size: 24px; }
.k-stat-grid span { font-size: 12px; color: var(--muted); }
.k-list { margin: 8px 0; padding: 0; list-style: none; text-align: left; }
.k-list li { display: flex; justify-content: space-between; gap: 8px; padding: 8px 10px; border-bottom: 1px dashed var(--line); }
.k-sheet h3 { margin: 16px 0 6px; font-size: 17px; text-align: left; }
.k-gate-q { font-size: 34px; font-weight: 900; margin: 10px 0; }
.k-keypad { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; max-width: 280px; margin: 10px auto 0; }
.k-keypad .k-btn { min-height: 54px; font-size: 22px; }
.k-input { min-height: 44px; font-size: 30px; font-weight: 900; letter-spacing: .1em; }

.k-foot { margin-top: 6px; text-align: center; color: var(--muted); font-size: 13px; }

/* Drag */
.k-dragging { position: fixed !important; z-index: 30; pointer-events: none; transform: scale(1.12); filter: drop-shadow(0 8px 10px rgba(0, 0, 0, .2)); }
.k-drop-hot { outline: 4px dashed var(--warn); outline-offset: 3px; }

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; } }