/* =========================================================
   多奇遊戲中心 Duotify Game Center
   可愛、歡樂的糖果色系；行動裝置優先（mobile-first）RWD
   ========================================================= */

:root {
  color-scheme: light;

  /* 糖果色票 */
  --sun: #ffc93c;
  --sun-deep: #f5a700;
  --pink: #ff6fa5;
  --pink-soft: #ffe1ec;
  --sky: #3ba9ff;
  --sky-soft: #dff1ff;
  --mint: #2bc48a;
  --mint-soft: #dcf7ea;
  --lavender: #a98bff;
  --peach: #ffb38a;

  --ink: #2b2a4c;
  --ink-soft: #5d5b80;
  --paper: #fff8ec;
  --card: #ffffff;

  /* 分類主色 */
  --c-math: var(--sky);
  --c-math-soft: var(--sky-soft);
  --c-chinese: var(--pink);
  --c-chinese-soft: var(--pink-soft);
  --c-puzzle: var(--mint);
  --c-puzzle-soft: var(--mint-soft);

  --radius: 1.5rem;
  --radius-lg: 2rem;
  --shadow: 0 0.5rem 0 rgb(43 42 76 / 0.08), 0 1rem 2rem rgb(43 42 76 / 0.08);
  --shadow-pop: 0 0.75rem 0 rgb(43 42 76 / 0.1), 0 1.5rem 3rem rgb(43 42 76 / 0.14);

  --font: "Huninn", "jf-openhuninn", "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", system-ui, sans-serif;
  --gutter: clamp(1rem, 4vw, 2rem);
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 6rem; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--ink);
  background-color: var(--paper);
  /* 柔和圓點背景 */
  background-image: radial-gradient(rgb(255 201 60 / 0.25) 2px, transparent 2.5px);
  background-size: 28px 28px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

/* 確保 hidden 屬性不會被 display: grid / flex 等樣式蓋掉 */
[hidden] { display: none !important; }

a { color: inherit; }

h1, h2, h3 { line-height: 1.25; margin: 0; font-weight: 400; }

.container {
  width: 100%;
  max-width: 72rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  text-decoration: none;
}
.skip-link:focus { top: 1rem; }

:focus-visible {
  outline: 4px solid var(--lavender);
  outline-offset: 3px;
}

/* ---------- 按鈕 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  min-height: 3.25rem;
  padding: 0.6rem 1.6rem;
  border: 0;
  border-radius: 999px;
  font: inherit;
  font-size: 1.125rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn-primary {
  background: var(--sun);
  color: var(--ink);
  box-shadow: 0 0.3rem 0 var(--sun-deep);
}
.btn-ghost {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 0.3rem 0 rgb(43 42 76 / 0.15);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0.2rem); box-shadow: 0 0.1rem 0 var(--sun-deep); }

/* ---------- 頁首 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  padding-top: env(safe-area-inset-top, 0px);
  background: rgb(255 248 236 / 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 3px dashed rgb(255 201 60 / 0.6);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 0.5rem;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}
.brand-mascot {
  width: 3rem;
  height: 3rem;
  animation: bob 3s ease-in-out infinite;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-size: 1.35rem; letter-spacing: 0.04em; }
.brand-sub { font-size: 0.75rem; color: var(--ink-soft); letter-spacing: 0.08em; }

.site-nav { display: flex; gap: 0.35rem; flex-wrap: wrap; }
.site-nav a {
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.95rem;
  transition: background 0.15s ease;
}
.site-nav a:hover { background: #fff; }
.site-nav a[data-filter-link="math"] { color: #1677c9; }
.site-nav a[data-filter-link="chinese"] { color: #d63a77; }
.site-nav a[data-filter-link="puzzle"] { color: #12895c; }

/* 手機上隱藏頁首導覽，改用下方 chips */
@media (max-width: 40rem) {
  .site-nav { display: none; }
}

/* ---------- 主視覺 ---------- */
.hero {
  position: relative;
  padding-block: clamp(2rem, 6vw, 4.5rem) clamp(4rem, 8vw, 6rem);
  background:
    radial-gradient(60% 80% at 85% 20%, rgb(169 139 255 / 0.25), transparent 70%),
    radial-gradient(50% 70% at 10% 90%, rgb(255 111 165 / 0.18), transparent 70%),
    linear-gradient(180deg, #dff1ff 0%, #fff4fb 100%);
  overflow: hidden;
}
.hero-inner {
  display: grid;
  gap: 2rem;
  align-items: center;
}
.hero-copy { text-align: center; }
.hero-badge {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.3rem 1rem;
  border-radius: 999px;
  background: #fff;
  font-size: 0.95rem;
  box-shadow: var(--shadow);
}
.hero-title {
  font-size: clamp(2.6rem, 9vw, 4.5rem);
  letter-spacing: 0.04em;
}
.wiggle {
  display: inline-block;
  color: var(--pink);
  text-shadow: 0.06em 0.06em 0 #fff, 0.1em 0.1em 0 rgb(255 111 165 / 0.25);
  animation: wiggle 2.6s ease-in-out infinite;
}
.wiggle-2 { color: var(--sky); animation-delay: 0.4s; text-shadow: 0.06em 0.06em 0 #fff, 0.1em 0.1em 0 rgb(59 169 255 / 0.25); }
.hero-lead {
  max-width: 32rem;
  margin: 1rem auto 1.5rem;
  color: var(--ink-soft);
  font-size: 1.125rem;
}
.hero-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}
.hero-stats li {
  padding: 0.35rem 0.9rem;
  border-radius: 1rem;
  background: rgb(255 255 255 / 0.8);
  font-size: 0.95rem;
}
.hero-stats strong { font-size: 1.25rem; color: var(--sun-deep); font-weight: 400; }

.hero-art {
  position: relative;
  max-width: 36rem;
  margin-inline: auto;
}
.hero-art img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 42% 58% 55% 45% / 48% 42% 58% 52%;
  border: 0.5rem solid #fff;
  box-shadow: var(--shadow-pop);
  animation: float 6s ease-in-out infinite;
}

@media (min-width: 56rem) {
  .hero-inner { grid-template-columns: 1fr 1.1fr; }
  .hero-copy { text-align: start; }
  .hero-lead { margin-inline: 0; }
  .hero-actions, .hero-stats { justify-content: flex-start; }
}

.wave {
  position: absolute;
  left: 0;
  width: 100%;
  height: clamp(2rem, 5vw, 4rem);
  fill: var(--paper);
}
.wave-bottom { bottom: -1px; }

/* ---------- 區塊通用 ---------- */
.section { padding-block: clamp(2.5rem, 6vw, 4rem); }
.section-title {
  margin-bottom: 1.75rem;
  text-align: center;
  font-size: clamp(1.75rem, 5vw, 2.4rem);
}
.hl {
  padding-inline: 0.15em;
  background: linear-gradient(transparent 60%, rgb(255 201 60 / 0.65) 60%);
  border-radius: 0.2em;
}

/* ---------- 分類卡 ---------- */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: 1.25rem;
}
.cat-card {
  --c: var(--c-math);
  --c-soft: var(--c-math-soft);
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas: "icon name" "icon desc" "icon count";
  align-items: center;
  column-gap: 1rem;
  padding: 1rem 1.25rem;
  border: 3px solid var(--c);
  border-radius: var(--radius-lg);
  background: var(--c-soft);
  color: var(--ink);
  font: inherit;
  text-align: start;
  cursor: pointer;
  box-shadow: 0 0.4rem 0 var(--c);
  transition: transform 0.2s cubic-bezier(.34,1.56,.64,1), box-shadow 0.2s ease;
}
.cat-card:hover { transform: translateY(-4px) rotate(-1deg); }
.cat-card:active { transform: translateY(0.3rem); box-shadow: 0 0.1rem 0 var(--c); }
.cat-card img { grid-area: icon; width: 5.5rem; height: 5.5rem; transition: transform 0.3s ease; }
.cat-card:hover img { transform: scale(1.1) rotate(6deg); }
.cat-name { grid-area: name; font-size: 1.6rem; line-height: 1.2; }
.cat-desc { grid-area: desc; color: var(--ink-soft); font-size: 0.95rem; }
.cat-count { grid-area: count; font-size: 0.9rem; color: var(--c); filter: brightness(0.8); }
.cat-chinese { --c: var(--c-chinese); --c-soft: var(--c-chinese-soft); }
.cat-puzzle { --c: var(--c-puzzle); --c-soft: var(--c-puzzle-soft); }

/* 平板以上固定三欄並改為直式卡片，避免 2+1 落單排列 */
@media (min-width: 40rem) {
  .cat-grid { grid-template-columns: repeat(3, 1fr); }
  .cat-card {
    grid-template-columns: 1fr;
    grid-template-areas: "icon" "name" "desc" "count";
    justify-items: center;
    text-align: center;
    padding: 1.5rem;
  }
  .cat-card img { width: clamp(5.5rem, 12vw, 8rem); height: auto; aspect-ratio: 1; }
}

/* ---------- 工具列：篩選 + 搜尋 ---------- */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip {
  --c: var(--sun-deep);
  min-height: 2.75rem;
  padding: 0.35rem 1.1rem;
  border: 2px solid var(--c);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.15s ease;
}
.chip:hover { transform: translateY(-2px); }
.chip[aria-pressed="true"] { background: var(--c); color: #fff; }
.chip-math { --c: var(--c-math); }
.chip-chinese { --c: var(--c-chinese); }
.chip-puzzle { --c: var(--c-puzzle); }

.search {
  position: relative;
  flex: 1 1 14rem;
  max-width: 22rem;
}
.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  translate: 0 -50%;
  pointer-events: none;
}
.search input {
  width: 100%;
  min-height: 2.9rem;
  padding: 0.4rem 1rem 0.4rem 2.75rem;
  border: 2px solid rgb(43 42 76 / 0.15);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 1rem; /* 避免 iOS 自動放大 */
}
.search input:focus { border-color: var(--lavender); outline: none; box-shadow: 0 0 0 4px rgb(169 139 255 / 0.3); }

@media (max-width: 40rem) {
  .search { max-width: none; }
}

.result-info { margin: 0 0 1.25rem; color: var(--ink-soft); font-size: 0.95rem; }

/* ---------- 遊戲卡 ---------- */
.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr));
  gap: clamp(1rem, 3vw, 1.75rem);
  margin: 0;
  padding: 0;
  list-style: none;
}
.game-card {
  --c: var(--c-math);
  --c-soft: var(--c-math-soft);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--card);
  text-decoration: none;
  box-shadow: var(--shadow);
  border: 3px solid transparent;
  transition: transform 0.25s cubic-bezier(.34,1.56,.64,1), box-shadow 0.25s ease, border-color 0.25s ease;
  /* backwards：動畫結束後不鎖住 transform，讓 hover 效果可以生效 */
  animation: pop-in 0.45s cubic-bezier(.34,1.56,.64,1) backwards;
  animation-delay: calc(var(--i, 0) * 50ms);
}
.game-card[data-category="chinese"] { --c: var(--c-chinese); --c-soft: var(--c-chinese-soft); }
.game-card[data-category="puzzle"] { --c: var(--c-puzzle); --c-soft: var(--c-puzzle-soft); }
.game-card:hover,
.game-card:focus-visible {
  transform: translateY(-6px) rotate(-0.6deg);
  box-shadow: var(--shadow-pop);
  border-color: var(--c);
}
.game-thumb {
  position: relative;
  aspect-ratio: 3 / 2;
  background: var(--c-soft);
  overflow: hidden;
}
.game-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.game-card:hover .game-thumb img { transform: scale(1.06); }
.game-badge {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.15rem 0.75rem;
  border-radius: 999px;
  background: var(--c);
  color: #fff;
  font-size: 0.9rem;
  box-shadow: 0 0.2rem 0 rgb(0 0 0 / 0.12);
}
.game-grade {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  padding: 0.15rem 0.7rem;
  border-radius: 999px;
  background: rgb(255 255 255 / 0.92);
  font-size: 0.85rem;
}
.game-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.4rem;
  padding: 1rem 1.25rem 1.25rem;
}
.game-title { font-size: 1.3rem; }
.game-desc {
  flex: 1;
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}
.game-play {
  align-self: flex-start;
  margin-top: 0.5rem;
  padding: 0.35rem 1.1rem;
  border-radius: 999px;
  background: var(--c);
  color: #fff;
  font-size: 1rem;
  transition: transform 0.2s ease;
}
.game-card:hover .game-play { transform: scale(1.06); }

/* ---------- 空狀態 ---------- */
.empty {
  display: grid;
  justify-items: center;
  gap: 0.75rem;
  padding: 2rem 1rem;
  text-align: center;
  color: var(--ink-soft);
}
.empty img { width: 10rem; animation: bob 2.4s ease-in-out infinite; }
.empty p { margin: 0; font-size: 1.1rem; }

/* ---------- 頁尾 ---------- */
.site-footer {
  position: relative;
  margin-top: 3rem;
  padding-block: clamp(4rem, 8vw, 5rem) calc(2rem + env(safe-area-inset-bottom, 0px));
  background: linear-gradient(180deg, #fff0c2 0%, #ffe1ec 100%);
  text-align: center;
}
.wave-top { top: -1px; }
.footer-inner { display: grid; justify-items: center; gap: 0.5rem; }
.footer-mascot { width: 7rem; animation: bounce 2s ease-in-out infinite; }
.footer-cheer { margin: 0; font-size: 1.1rem; }
.footer-credit { margin: 0.25rem 0 0; color: var(--ink-soft); }
.footer-credit a {
  color: #d63a77;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}
.footer-credit a:hover { color: var(--ink); }
.to-top {
  margin-top: 0.75rem;
  padding: 0.3rem 1rem;
  border-radius: 999px;
  background: #fff;
  text-decoration: none;
  font-size: 0.95rem;
  box-shadow: 0 0.2rem 0 rgb(43 42 76 / 0.12);
}

/* ---------- 動畫 ---------- */
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(0.8deg); }
}
@keyframes wiggle {
  0%, 100% { transform: rotate(-2deg); }
  50% { transform: rotate(2deg) scale(1.04); }
}
@keyframes bounce {
  0%, 100% { transform: translateY(0) scale(1, 1); }
  40% { transform: translateY(-14px) scale(0.97, 1.03); }
  60% { transform: translateY(0) scale(1.04, 0.96); }
}
@keyframes pop-in {
  from { opacity: 0; transform: translateY(16px) scale(0.96); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}