/* ===========================================================================
 * games/site.css — 跨游戏索引首页（games.yuknsite.com 落地页）共享样式
 * ---------------------------------------------------------------------------
 * 设计约定（对齐 opc-doc/art 美术圣经 + hub-core 视觉语言）：
 *   ▸ 深色背景、无外部 CDN / 无 GA / 无追踪脚本、可 file:// 离线打开
 *   ▸ 色盲安全：品牌标用「蓝 #0072B2 → 橙 #D55E00」双色编码，
 *     任何状态/信息不依赖单一颜色传达（文字 + 形状 + 颜色 三重编码）
 *   ▸ 响应式卡片墙：手机单栏 → 平板两栏 → 桌面三栏
 *   ▸ user-select: none（与 hub 一致，避免长按误选）
 * =========================================================================== */

:root {
  --bg: #070B14;
  --panel: #0E1626;
  --panel-2: #13203A;
  --border: rgba(120, 160, 210, 0.18);
  --text: #E8EEF6;
  --muted: #9FB0C4;
  --gold: #C8A04E;            /* 主站桥接金，仅用于「返回主站」 */
  /* 色盲安全双编码强调色（蓝 / 橙） */
  --cb-blue: #0072B2;
  --cb-orange: #D55E00;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, 'Noto Sans SC', 'Noto Sans TC', 'PingFang SC', 'Microsoft JhengHei', sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 620px at 50% -10%, rgba(46, 196, 255, 0.10), transparent 60%),
    radial-gradient(900px 520px at 100% 100%, rgba(255, 46, 151, 0.08), transparent 55%),
    var(--bg);
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-user-select: none;
  user-select: none;
  -webkit-font-smoothing: antialiased;
}

/* ----------------------------- 顶部栏 ----------------------------------- */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px clamp(16px, 4vw, 48px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, var(--cb-blue), var(--cb-orange));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 15px; letter-spacing: .5px;
}
.brand-name { font-weight: 800; letter-spacing: .18em; font-size: 14px; color: var(--text); }

/* --------------------------- 语言切换 ---------------------------------- */
.lang { position: relative; }
.lang-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--panel-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 10px;
  padding: 8px 14px; font-size: 14px; cursor: pointer; min-height: 44px;
}
.lang-btn:hover { border-color: var(--cb-blue); }
.lang-menu {
  position: absolute; top: calc(100% + 8px); right: 0; z-index: 50;
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 6px; min-width: 168px; box-shadow: 0 10px 30px rgba(0, 0, 0, .5);
}
.lang-menu[hidden] { display: none; }
.lang-menu button {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  width: 100%; background: transparent; border: 0; color: var(--muted);
  text-align: left; padding: 10px 12px; border-radius: 8px;
  font-size: 14px; cursor: pointer; min-height: 44px;
}
.lang-menu button:hover { background: var(--panel-2); color: var(--text); }
.lang-menu button[aria-current="true"] { color: #fff; font-weight: 700; }
.lang-menu button .tick { color: var(--cb-blue); font-weight: 800; visibility: hidden; }
.lang-menu button[aria-current="true"] .tick { visibility: visible; }

/* ----------------------------- Hero ------------------------------------ */
.hero {
  max-width: 1120px; margin: 0 auto;
  padding: clamp(32px, 6vw, 64px) clamp(16px, 4vw, 48px) 8px;
  text-align: center;
}
.hero h1 {
  font-weight: 800; font-size: clamp(28px, 5vw, 44px);
  margin: 0 0 12px; letter-spacing: .02em;
}
.hero p {
  color: var(--muted); font-size: clamp(14px, 2vw, 17px);
  margin: 0 auto; max-width: 620px; line-height: 1.6;
}

/* --------------------------- Trust Bar ---------------------------------- */
.trust-bar {
  display: flex; justify-content: center; flex-wrap: wrap;
  gap: clamp(12px, 2vw, 24px);
  max-width: 720px; margin: 0 auto 8px;
  padding: 0 clamp(16px, 3vw, 24px);
}
.trust-bar span {
  font-size: 13px; font-weight: 600; color: var(--muted);
  padding: 6px 14px;
  background: rgba(14,22,38,.5);
  border: 1px solid rgba(120,160,210,.15);
  border-radius: 20px;
  white-space: nowrap;
}

/* --------------------------- 卡片墙 ------------------------------------ */
.wall {
  max-width: 1120px; margin: 0 auto;
  padding: clamp(24px, 4vw, 48px) clamp(16px, 4vw, 48px) 64px;
  display: grid; gap: 22px; grid-template-columns: 1fr;
}
@media (min-width: 640px) { .wall { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .wall { grid-template-columns: repeat(3, 1fr); } }

.card {
  position: relative; display: flex; flex-direction: column;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 18px; overflow: hidden; text-decoration: none; color: inherit;
  transition: transform .3s cubic-bezier(.25, .1, .25, 1), border-color .3s, box-shadow .3s;
}
.card:hover, .card:focus-visible {
  transform: translateY(-6px);
  border-color: var(--accent, #2EC4FF);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .45);
  outline: none;
}
.card:focus-visible { outline: 2px solid var(--accent, #2EC4FF); outline-offset: 3px; }

.cover {
  position: relative; height: 180px;
  display: flex; align-items: center; justify-content: center;
  background: var(--cover-grad);
  overflow: hidden;
}
.cover-img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.cover::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(to top, rgba(0, 0, 0, .45) 0%, transparent 35%),
    radial-gradient(120% 80% at 50% 0%, transparent 60%, rgba(0, 0, 0, .25) 100%);
}
.emblem { width: 84px; height: 84px; color: var(--accent, #2EC4FF); filter: drop-shadow(0 0 18px var(--accent-soft, rgba(46, 196, 255, .5))); }
.tag {
  position: absolute; top: 12px; left: 12px; z-index: 2;
  font-size: 12px; letter-spacing: .04em;
  padding: 5px 10px; border-radius: 999px;
  background: rgba(0, 0, 0, .45); border: 1px solid var(--accent-soft, rgba(255, 255, 255, .35));
  color: #fff;
}

.card-body { padding: 20px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.card-title { margin: 0; font-size: 20px; font-weight: 800; color: #fff; }
.card-desc { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; flex: 1; }
.play {
  margin-top: 4px; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--accent, #2EC4FF); color: #04121f; font-weight: 800; font-size: 15px;
  padding: 12px 16px; border-radius: 12px; min-height: 48px;
  transition: transform .15s, filter .2s;
}
.play:hover { filter: brightness(1.08); }
.play:active { transform: scale(.97); }
.play svg { width: 18px; height: 18px; }

/* Coming Soon 卡片 */
.card-soon { opacity: 0.7; pointer-events: none; }
.soon-badge {
  display: inline-block;
  margin-top: 4px;
  padding: 8px 16px;
  border-radius: 12px;
  background: rgba(255,255,255,0.08);
  border: 1px dashed rgba(255,255,255,0.25);
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* P3: 分离 Coming Soon 区块 */
.wall-heading {
  grid-column: 1 / -1;
  margin: 0;
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 800; color: #fff;
  display: flex; align-items: center; gap: 10px;
}
.coming-soon {
  grid-column: 1 / -1;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(255,255,255,0.02);
  padding: 4px 18px 22px;
}
.coming-soon > summary {
  cursor: pointer; list-style: none;
  padding: 14px 4px;
  font-size: 18px; font-weight: 800; color: #fff;
  display: flex; align-items: center; gap: 10px;
}
.coming-soon > summary::-webkit-details-marker { display: none; }
.coming-soon > summary::after {
  content: "▸"; margin-left: auto; color: var(--muted);
  transition: transform .2s;
}
.coming-soon[open] > summary::after { transform: rotate(90deg); }
.soon-grid {
  display: grid; gap: 22px; grid-template-columns: 1fr;
}
@media (min-width: 640px) { .soon-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .soon-grid { grid-template-columns: repeat(3, 1fr); } }
.card-noindex { opacity: .82; }
.card-noindex .soon-flag {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  z-index: 3; pointer-events: none;
  padding: 8px 18px; border-radius: 999px;
  background: rgba(0,0,0,.62); border: 1px solid rgba(255,255,255,.45);
  color: #fff; font-weight: 800; letter-spacing: .08em; font-size: 14px;
  text-transform: uppercase; white-space: nowrap;
}

/* P4: Featured Daily Brain Gym 大卡 */
.featured-game {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 340px) 1fr;
  border: 1px solid rgba(91, 155, 213, .45);
  border-radius: 20px;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(91, 155, 213, .16), rgba(91, 155, 213, .04));
  transition: transform .3s cubic-bezier(.25, .1, .25, 1), box-shadow .3s, border-color .3s;
}
.featured-game:hover {
  transform: translateY(-4px);
  border-color: #5B9BD5;
  box-shadow: 0 16px 44px rgba(91, 155, 213, .25);
}
.featured-media { position: relative; display: block; min-height: 210px; }
.featured-media .cover-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.featured-badge {
  position: absolute; top: 12px; left: 12px; z-index: 2;
  font-size: 12px; font-weight: 800; letter-spacing: .04em;
  padding: 6px 12px; border-radius: 999px;
  background: #5B9BD5; color: #04121f;
  box-shadow: 0 4px 14px rgba(91, 155, 213, .5);
}
.featured-body { padding: clamp(20px, 3vw, 32px); display: flex; flex-direction: column; gap: 12px; justify-content: center; }
.featured-tag { font-size: 12px; letter-spacing: .06em; color: var(--muted); text-transform: uppercase; }
.featured-title { margin: 0; font-size: clamp(22px, 3vw, 30px); font-weight: 900; color: #fff; }
.featured-desc { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.65; max-width: 54ch; }
.featured-streak { margin: 0; font-size: 15px; font-weight: 800; color: #FFB860; }
.featured-cta {
  align-self: flex-start; margin-top: 4px;
  display: inline-flex; align-items: center; gap: 8px;
  background: #5B9BD5; color: #04121f; font-weight: 800; font-size: 15px;
  padding: 12px 20px; border-radius: 12px; text-decoration: none;
  transition: filter .2s, transform .15s;
}
.featured-cta:hover { filter: brightness(1.08); }
.featured-cta:active { transform: scale(.97); }
.featured-cta svg { width: 18px; height: 18px; }
@media (max-width: 639px) {
  .featured-game { grid-template-columns: 1fr; }
  .featured-media { min-height: 180px; }
}

/* ----------------------------- 页脚 ------------------------------------ */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px clamp(16px, 4vw, 48px);
  text-align: center; color: var(--muted); font-size: 13px;
}
.footer-inner {
  display: flex; align-items: center; justify-content: center; gap: 16px;
  flex-wrap: wrap;
}
.site-footer a { color: var(--gold); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.kofi-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 20px;
  background: linear-gradient(135deg, #FF5E5B, #FF8A5B);
  color: #fff !important; font-weight: 600; font-size: 13px;
  transition: transform .15s, box-shadow .15s;
}
.kofi-btn:hover {
  text-decoration: none !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(255, 94, 91, .35);
}

/* Floating Ko-fi CTA — fixed bottom-right, fades in after the hero */
.kofi-fab {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 16px;
  border-radius: 30px;
  background: linear-gradient(135deg, #FF5E5B, #FF8A5B);
  color: #fff !important;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(255, 94, 91, .4);
  transition: opacity .3s ease, transform .3s ease, visibility .3s;
}
.kofi-fab:hover {
  text-decoration: none !important;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(255, 94, 91, .5);
}
.kofi-fab.is-hidden {
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  pointer-events: none;
}
@media (max-width: 480px) {
  .kofi-fab { padding: 9px 13px; font-size: 13px; }
}

/* ---- Game Categories Navigation ---- */
.game-categories {
  max-width: 1000px;
  margin: 0 auto;
  padding: 48px 20px 32px;
}
.categories-title {
  text-align: center;
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 24px;
  color: var(--white);
}
.categories-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}
.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 20px 16px;
  background: var(--panel2);
  border: 1px solid var(--grid);
  border-radius: 14px;
  text-decoration: none;
  transition: border-color .2s, transform .2s;
}
.category-card:hover {
  border-color: var(--blue);
  transform: translateY(-2px);
}
.category-icon {
  font-size: 32px;
  line-height: 1;
}
.category-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}
.category-desc {
  font-size: 13px;
  color: var(--dusk);
  text-align: center;
}

/* --------------------- 减弱动效（可访问性） -------------------------- */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}