:root {
  --ink: #24342f;
  --muted: #75817d;
  --cream: #fffaf3;
  --paper: rgba(255,255,255,.86);
  --orange: #ff7448;
  --orange-dark: #e9542e;
  --yellow: #ffc64b;
  --mint: #b9e1ca;
  --green: #39745e;
  --line: rgba(45, 75, 63, .12);
  --shadow: 0 22px 60px rgba(56, 63, 47, .12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 12%, #ffe7c8 0 6%, transparent 21%),
    radial-gradient(circle at 92% 45%, #dff3e7 0 7%, transparent 24%),
    #fff9f0;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  overflow-x: hidden;
}

button, input { font: inherit; }
button { color: inherit; }

.ambient { position: fixed; border-radius: 50%; filter: blur(1px); pointer-events: none; z-index: -1; }
.ambient-one { width: 250px; height: 250px; background: rgba(255, 187, 112, .14); top: 36%; left: -140px; }
.ambient-two { width: 300px; height: 300px; background: rgba(107, 178, 145, .10); right: -170px; bottom: -60px; }

.app-shell { width: min(1480px, calc(100% - 32px)); margin: 0 auto; }
.topbar { height: 82px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 900; font-size: 18px; letter-spacing: .06em; }
.brand-mark { width: 34px; height: 34px; border-radius: 11px; display: grid; place-items: center; color: white; background: var(--orange); box-shadow: 0 6px 16px rgba(255,116,72,.3); transform: rotate(-5deg); }
.icon-button { border: 1px solid var(--line); background: rgba(255,255,255,.65); width: 40px; height: 40px; border-radius: 50%; cursor: pointer; transition: .2s; }
.icon-button:hover { transform: translateY(-2px); background: white; }
.icon-button.muted { opacity: .4; text-decoration: line-through; }

.hero { padding: 38px 0 28px; display: flex; align-items: end; justify-content: space-between; gap: 36px; }
.eyebrow { margin: 0 0 10px; color: var(--orange-dark); text-transform: uppercase; font-weight: 800; font-size: 12px; letter-spacing: .22em; }
h1 { font-family: Georgia, "STSong", serif; font-size: clamp(42px, 4.4vw, 66px); line-height: 1.02; margin: 0; letter-spacing: -.06em; font-weight: 900; }
h1 em { color: var(--orange); font-style: normal; position: relative; }
h1 em::after { content: ""; height: 7px; background: var(--yellow); position: absolute; left: 3px; right: -3px; bottom: -4px; border-radius: 50%; transform: rotate(-1deg); opacity: .65; }
.intro { max-width: 590px; color: var(--muted); font-size: 15px; line-height: 1.8; margin: 26px 0 0; }

.stats { display: grid; grid-template-columns: 150px; gap: 10px; flex: 0 0 auto; }
.stat-card { padding: 18px 20px; border-radius: 20px; background: var(--paper); border: 1px solid rgba(255,255,255,.8); box-shadow: 0 10px 30px rgba(60,66,52,.08); }
.stat-card span { display: block; color: var(--muted); font-size: 12px; margin-bottom: 5px; }
.stat-card strong { font-size: 28px; line-height: 1; }
.score-card strong { color: var(--orange-dark); }
.restart-button { border: 0; border-radius: 16px; padding: 13px; cursor: pointer; background: var(--ink); color: white; font-weight: 700; transition: .2s; }
.restart-button:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(36,52,47,.18); }

.game-layout { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 24px; align-items: start; }
.tool-panel, .board-wrap { border: 1px solid rgba(255,255,255,.75); background: var(--paper); backdrop-filter: blur(16px); box-shadow: var(--shadow); }
.tool-panel { border-radius: 28px; padding: 22px; }
.panel-heading { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.panel-heading h2 { margin: 0 0 3px; font-size: 17px; }
.panel-heading p { color: var(--muted); font-size: 11px; margin: 0; }
.panel-icon { width: 36px; height: 36px; display: grid; place-items: center; color: var(--green); background: #e1f1e8; border-radius: 12px; }
.upload-zone { display: flex; min-height: 118px; flex-direction: column; align-items: center; justify-content: center; gap: 5px; border: 1.5px dashed #c5d1cb; border-radius: 18px; background: rgba(247,250,246,.8); cursor: pointer; transition: .2s; }
.upload-zone:hover, .upload-zone.dragging { background: #eef8f2; border-color: var(--green); transform: translateY(-2px); }
.upload-zone input { display: none; }
.upload-icon { font-size: 25px; line-height: 1; color: var(--orange); }
.upload-zone strong { font-size: 13px; }
.upload-zone small { font-size: 10px; color: var(--muted); }
.image-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 16px 0; min-height: 54px; }
.image-chip { position: relative; aspect-ratio: 1; border-radius: 13px; overflow: hidden; background: #edf1ed; animation: pop-in .25s ease both; }
.image-chip img { width: 100%; height: 100%; object-fit: cover; }
.image-chip button { position: absolute; inset: 2px 2px auto auto; width: 18px; height: 18px; display: grid; place-items: center; border: 0; border-radius: 50%; background: rgba(28,38,34,.76); color: white; font-size: 11px; cursor: pointer; }
.tip-box { display: flex; gap: 10px; padding: 13px; border-radius: 15px; background: #fff4d5; color: #785e20; font-size: 10px; line-height: 1.5; }
.tip-box > span { color: #e8a719; font-size: 16px; }
.tip-box p { margin: 0; }

.board-wrap { min-width: 0; border-radius: 30px; padding: 22px; }
.board-toolbar { display: flex; justify-content: space-between; align-items: center; padding: 2px 4px 16px; }
.board-toolbar p { margin: 0; color: var(--muted); font-size: 12px; }
.toolbar-actions { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }
.zoom-button { display: none; border: 0; border-radius: 99px; padding: 7px 10px; color: var(--green); background: #e6f3eb; font-size: 10px; font-weight: 800; cursor: pointer; }
.pulse-dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: #58a67f; margin-right: 6px; box-shadow: 0 0 0 4px rgba(88,166,127,.12); }
.combo { background: #fff0e7; color: var(--orange-dark); padding: 6px 10px; border-radius: 99px; font-size: 10px; font-weight: 800; }
.board { --size: 8; width: 100%; display: grid; grid-template-columns: repeat(var(--size), 1fr); gap: clamp(7px, .7vw, 11px); padding: clamp(13px, 1.4vw, 22px); border-radius: 25px; background: linear-gradient(145deg, #d9eadf, #c5dfcf); box-shadow: inset 0 2px 10px rgba(53,101,79,.12); touch-action: manipulation; }
.tile { position: relative; aspect-ratio: 1; min-width: 0; border: 0; border-radius: clamp(10px, 1.1vw, 16px); overflow: hidden; padding: 0; cursor: pointer; background: rgba(255,255,255,.76); box-shadow: 0 3px 7px rgba(56,83,69,.14), inset 0 0 0 2px rgba(255,255,255,.45); transition: transform .18s, box-shadow .18s, opacity .18s; }
.tile:hover { transform: translateY(-3px) scale(1.02); box-shadow: 0 7px 14px rgba(56,83,69,.2); z-index: 2; }
.tile.selected { transform: scale(.88); box-shadow: 0 0 0 4px var(--orange), 0 7px 14px rgba(56,83,69,.2); }
.tile img { width: 100%; height: 100%; display: block; object-fit: cover; pointer-events: none; }
.tile.default-tile { display: grid; place-items: center; font-size: clamp(21px, 3.3vw, 42px); }
.tile.matched { overflow: visible; z-index: 5; animation: matched .4s ease forwards; }
.tile.invalid { animation: shake .3s ease; }
.spark { --dx: 0px; --dy: 0px; --spark-color: #ffc64b; position: absolute; left: 50%; top: 50%; width: 8px; height: 8px; border-radius: 50%; background: var(--spark-color); box-shadow: 0 0 7px var(--spark-color); pointer-events: none; z-index: 8; animation: spark-burst .48s cubic-bezier(.12,.7,.22,1) forwards; }

footer { display: flex; justify-content: space-between; padding: 32px 2px 40px; color: #99a19d; font-size: 10px; }
dialog { width: min(390px, calc(100% - 40px)); border: 0; border-radius: 28px; padding: 34px; text-align: center; color: var(--ink); box-shadow: 0 30px 100px rgba(20,35,28,.25); }
dialog::backdrop { background: rgba(28,44,37,.45); backdrop-filter: blur(4px); }
.dialog-art { width: 60px; height: 60px; display: grid; place-items: center; margin: 0 auto 14px; border-radius: 20px; color: white; font-size: 28px; background: var(--orange); transform: rotate(-5deg); }
dialog h2 { margin: 0 0 8px; }
dialog p { color: var(--muted); line-height: 1.6; }
dialog button { border: 0; border-radius: 14px; padding: 12px 24px; background: var(--ink); color: white; font-weight: 800; cursor: pointer; }

@keyframes pop-in { from { opacity: 0; transform: scale(.7) rotate(-5deg); } }
@keyframes matched { 35% { transform: scale(1.14) rotate(3deg); filter: brightness(1.35); } 60% { opacity: 1; } to { transform: scale(.08); opacity: 0; filter: brightness(1.8); } }
@keyframes spark-burst { from { transform: translate(-50%, -50%) scale(1); opacity: 1; } to { transform: translate(calc(-50% + var(--dx)), calc(-50% + var(--dy))) scale(.15); opacity: 0; } }
@keyframes shake { 25% { transform: translateX(-5px); } 50% { transform: translateX(5px); } 75% { transform: translateX(-3px); } }

@media (max-width: 820px) {
  .hero { align-items: start; flex-direction: column; padding-top: 36px; }
  .stats { width: 100%; grid-template-columns: 1fr 1fr; }
  .game-layout { grid-template-columns: 1fr; }
  .tool-panel { order: 2; }
  .board-wrap { order: 1; }
  .zoom-button { display: inline-flex; align-items: center; }
  .board-wrap.mobile-zoom { overflow-x: auto; overscroll-behavior-x: contain; scrollbar-width: thin; }
  .board-wrap.mobile-zoom .board { width: 720px; max-width: none; }
  .image-list { grid-template-columns: repeat(8, 1fr); }
}

@media (min-width: 1280px) {
  .tool-panel { position: sticky; top: 18px; }
  .board-toolbar { padding-bottom: 18px; }
  .tile { border-radius: 18px; }
}

@media (max-width: 520px) {
  .app-shell { width: calc(100% - 8px); }
  .topbar { height: 52px; padding: 0 7px; }
  .brand { font-size: 15px; }
  .brand-mark { width: 29px; height: 29px; border-radius: 9px; }
  .icon-button { width: 34px; height: 34px; }
  .hero { padding: 16px 7px 14px; gap: 13px; }
  .eyebrow { margin-bottom: 5px; font-size: 9px; }
  h1 { font-size: 32px; line-height: 1; }
  h1 br { display: none; }
  .intro { max-width: 95%; margin-top: 12px; font-size: 10px; line-height: 1.55; }
  .stats { width: 100%; grid-template-columns: 1fr 1fr; gap: 7px; }
  .stat-card { min-height: 52px; padding: 9px 13px; border-radius: 14px; }
  .stat-card span { margin-bottom: 2px; font-size: 9px; }
  .stat-card strong { font-size: 21px; }
  .restart-button { min-height: 52px; padding: 8px; border-radius: 14px; font-size: 11px; }
  .game-layout { gap: 10px; }
  .board-wrap { padding: 4px; border-radius: 18px; }
  .board { gap: 3px; padding: 5px; border-radius: 15px; }
  .board-toolbar { padding: 6px 5px 9px; }
  .board-toolbar p { max-width: 48%; }
  .toolbar-actions { gap: 5px; }
  .combo { display: none; }
  .tool-panel { padding: 13px; border-radius: 19px; }
  .panel-heading { margin-bottom: 9px; }
  .panel-heading h2 { font-size: 14px; }
  .panel-icon { width: 30px; height: 30px; border-radius: 9px; }
  .upload-zone { min-height: 70px; flex-direction: row; gap: 7px; border-radius: 13px; }
  .upload-icon { font-size: 20px; }
  .upload-zone strong { font-size: 11px; }
  .upload-zone small { font-size: 8px; }
  .image-list { grid-template-columns: repeat(8, 1fr); gap: 5px; min-height: 38px; margin: 9px 0; }
  .image-chip { border-radius: 9px; }
  .tip-box { display: none; }
  footer { padding: 18px 5px 24px; }
}

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