/* Full-screen chapters; additional skills stay inside the second chapter. */
html{scroll-snap-type:y mandatory;scroll-padding-top:0}
body{overflow-x:clip}
.site-header{position:fixed;height:76px;background:#fafaf6ed;backdrop-filter:blur(12px)}
.hero,.toolbox,.shop-screen{height:100vh;height:100dvh;min-height:0;scroll-snap-align:start;scroll-snap-stop:always;scroll-margin-top:0}
.hero{padding:92px 28px 28px}
.hero-with-portrait{height:100%;min-height:0}
.hero-portrait{display:grid;grid-template-rows:minmax(0,1fr) auto;max-height:100%;height:min(72dvh,680px);min-height:0}
.hero-portrait img{width:100%;height:100%;object-fit:contain;min-height:0}
.toolbox{max-width:1160px;width:100%;padding:90px 30px 16px;display:grid;grid-template-rows:auto minmax(0,1fr) auto auto;gap:12px}
.section-heading{margin:0}
.section-heading h2{font-size:clamp(28px,3.4vw,44px);margin:0 0 8px}
.section-heading p{font-size:13px;line-height:1.6}
.card-grid{display:flex;gap:0;max-width:none;width:100%;min-height:0;padding:0;margin:0;overflow-x:auto;overflow-y:hidden;scroll-snap-type:x mandatory;scrollbar-width:none;overscroll-behavior-x:contain}
.card-grid::-webkit-scrollbar{display:none}
.card-page{flex:0 0 100%;min-width:0;height:100%;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px;padding:12px 10px 18px;scroll-snap-align:start;scroll-snap-stop:always}
.playing-card{height:100%;min-height:0;aspect-ratio:auto}
.playing-card:hover{transform:rotate(0deg)}
.card-detail{padding:39px 26px 20px}
.card-detail .detail-art{width:72px;height:27px;margin:0 auto 8px}
.resource-type{font-size:10px;margin-bottom:6px}
.card-detail h3{font-size:clamp(23px,2.2vw,30px);margin-bottom:7px;line-height:1.2}
.card-detail .resource-description{font-size:14px;line-height:1.55;margin-bottom:10px}
.resource-preview{min-height:0;max-height:none;flex:1 1 0;margin-bottom:10px}
.preview-images{overflow:hidden}
.preview-images img{object-fit:contain}
.preview-caption{font-size:10px;padding:6px 8px}
.card-detail .resource-tags{font-size:10px;margin-bottom:8px}
.resource-action{flex-shrink:0;font-size:13px;padding-top:9px}
.card-corner{font-size:22px;left:15px;top:13px}
.card-corner small{font-size:16px}
.card-signature{right:18px;top:17px;font-size:9px}
.skill-pagination{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:0 10px}
.skill-pagination #tool-count{margin:0;padding:0;text-align:left;font-size:11px}
.skill-pagination>div{display:flex;align-items:center;gap:14px}
.skill-pagination button{width:36px;height:36px;border:1px solid var(--line);border-radius:50%;background:transparent;font-size:18px}
.skill-pagination button:hover:enabled{background:var(--yellow);border-color:var(--ink)}
.skill-pagination button:disabled{opacity:.3;cursor:default}
#skill-page-number{font-size:12px;min-width:40px;text-align:center;font-variant-numeric:tabular-nums}
.toolbox footer{width:100%;margin:0;padding:10px 10px 0;gap:12px;flex-wrap:nowrap}
.toolbox footer .brand{font-size:22px}
.toolbox footer p{font-size:11px}
.toolbox footer .back-top{font-size:11px}
@media(max-width:760px){
  .card-page{grid-template-columns:1fr;max-width:100%;padding-inline:12px}
  .playing-card{max-width:540px;width:100%;margin:0 auto}
}
@media(max-width:680px){
  .site-header{height:64px;padding-inline:20px}
  .hero:has(.hero-with-portrait){height:100dvh;min-height:0;padding:76px 20px 16px}
  .hero-with-portrait{grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr);gap:12px}
  .hero-with-portrait .hero-logo{width:min(330px,88%);margin:0 auto 10px}
  .hero-with-portrait h1{font-size:32px;margin-bottom:10px}
  .hero-with-portrait .intro{font-size:13px;line-height:1.65;margin-bottom:14px}
  .hero-link{min-height:42px;padding:9px 17px;font-size:13px}
  .hero-portrait{height:100%;max-width:300px;min-height:0}
  .hero-portrait figcaption{font-size:8px;margin-top:2px}
  .toolbox{padding:78px 15px 12px;gap:9px}
  .section-heading h2{font-size:29px;margin-bottom:6px}
  .section-heading p{font-size:12px;max-width:none}
  .card-detail{padding:37px 24px 18px}
  .card-detail h3{font-size:25px}
  .card-detail .resource-description{font-size:13px;line-height:1.45}
  .toolbox footer{padding-top:9px}
  .toolbox footer p{font-size:9px}
  .toolbox footer .brand{font-size:20px}
}
@media(max-height:740px){
  .toolbox{gap:7px;padding-top:78px}
  .section-heading h2{font-size:28px;margin-bottom:4px}
  .section-heading p{font-size:11px}
  .card-detail .detail-art{display:none}
  .card-detail{padding-top:44px;padding-bottom:14px}
  .card-detail h3{font-size:23px}
  .card-detail .resource-description{font-size:12px;margin-bottom:7px}
  .resource-type{font-size:9px;margin-bottom:4px}
  .card-detail .resource-tags{margin-bottom:5px}
  .resource-action{padding-top:6px;font-size:12px}
  .hero-with-portrait .hero-logo{max-width:280px;margin-bottom:8px}
  .hero-with-portrait h1{font-size:30px;margin-bottom:8px}
  .hero-with-portrait .intro{font-size:12px;margin-bottom:10px}
}
.shop-screen{max-width:1240px;margin:auto;padding:104px 36px 24px;display:grid;grid-template-rows:minmax(0,1fr) auto;gap:24px}
.shop-content{display:grid;grid-template-columns:1fr 1.15fr;gap:clamp(30px,5vw,70px);align-items:center;min-height:0}
.shop-eyebrow{font-size:11px;letter-spacing:2px;color:var(--muted);margin:0 0 22px}
.shop-copy h2{font-size:clamp(38px,4vw,58px);line-height:1.25;letter-spacing:-2px;margin:0 0 22px}
.shop-copy h2 span{background:linear-gradient(transparent 72%,var(--yellow) 72%);padding-right:3px;white-space:nowrap}
.shop-description{font-size:15px;line-height:1.9;color:var(--muted);margin:0 0 28px}
.shop-contact{margin-top:32px;padding-top:24px;border-top:1px solid var(--line)}
.shop-contact label{font-size:12px;color:var(--muted)}
.shop-wechat-row{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:10px}
.shop-wechat-row input{font:700 clamp(23px,2.5vw,31px)/1.2 Arial,sans-serif;letter-spacing:1px;width:55%;min-width:0;padding:0;border:0;outline-offset:5px;background:transparent;color:var(--ink)}
.shop-wechat-row button{flex-shrink:0;display:flex;gap:16px;align-items:center;background:transparent;border:1px solid var(--ink);border-radius:7px;padding:11px 14px;font-size:12px}
.shop-wechat-row button:hover{background:var(--yellow)}
#shop-copy-status{min-height:2.8em;margin:12px 0 0;font-size:11px;line-height:1.6;color:var(--muted)}
.shop-preview{display:block;min-width:0;overflow:hidden;border:1px solid var(--ink);border-radius:16px;background:#fff;text-decoration:none;box-shadow:10px 12px 0 #ffe23d66;transform:rotate(1deg);transition:transform .2s}
.shop-preview:hover{transform:rotate(0deg) translateY(-3px)}
.shop-window-bar{display:flex;align-items:center;justify-content:space-between;padding:13px 16px;background:#f1f0e8;border-bottom:1px solid var(--line);font-size:10px;color:var(--muted)}
.shop-window-bar span:first-child{letter-spacing:3px;color:#a6ab9e}
.shop-preview img{display:block;width:100%;height:auto}
.shop-preview-caption{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 18px 0;border-top:1px solid var(--line);font-size:12px}
.shop-preview-caption strong{font-weight:650}
.shop-preview-caption>span{font-size:11px;white-space:nowrap}
.shop-preview>p{font-size:10px;color:var(--muted);margin:9px 18px 18px}
.shop-end{display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding-top:16px;font-size:11px;color:var(--muted)}
.shop-end a{text-decoration:none}
.shop-end>span{letter-spacing:2px;font-size:10px}
@media(max-width:900px){
  .shop-screen{padding:94px 28px 20px;gap:20px}
  .shop-content{grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr);gap:20px;max-width:560px;width:100%;margin:auto;height:100%;align-items:center}
  .shop-eyebrow{margin-bottom:12px}
  .shop-copy h2{font-size:40px;margin-bottom:13px}
  .shop-copy h2 br{display:none}
  .shop-description{font-size:13px;line-height:1.7;margin-bottom:18px}
  .shop-contact{margin-top:22px;padding-top:17px}
  #shop-copy-status{min-height:1.6em;margin-bottom:0}
  .shop-preview{width:100%;min-height:0;max-height:100%;display:grid;grid-template-rows:auto minmax(0,1fr) auto auto}
  .shop-preview img{height:100%;min-height:0;object-fit:cover;object-position:top}
}
@media(max-width:680px){
  .site-header{gap:12px}.site-header nav{gap:14px}.site-header nav a{font-size:11px}
  .shop-screen{padding:80px 24px 16px;gap:16px}
  .shop-content{gap:16px}
  .shop-eyebrow{font-size:9px;margin-bottom:10px}
  .shop-copy h2{font-size:32px;letter-spacing:-1.5px;margin-bottom:12px}
  .shop-description{font-size:12px;margin-bottom:16px}
  .shop-contact{margin-top:18px;padding-top:14px}
  .shop-wechat-row{margin-top:8px}.shop-wechat-row button{padding:9px 12px;font-size:11px}
  #shop-copy-status{font-size:10px}
  .shop-window-bar{padding:10px 12px;font-size:9px}
  .shop-preview-caption{padding:12px 13px 0;font-size:11px}
  .shop-preview-caption>span{font-size:10px}
  .shop-preview>p{font-size:9px;margin:7px 13px 12px}
  .shop-end{font-size:10px;padding-top:12px;gap:12px}
}
@media(max-width:900px) and (max-height:740px){
  .shop-screen{gap:12px;padding-top:76px;padding-bottom:12px}
  .shop-content{gap:12px}
  .shop-copy h2{font-size:28px;margin-bottom:9px}
  .shop-eyebrow{margin-bottom:7px}
  .shop-description{line-height:1.55;margin-bottom:12px}
  .shop-visit{min-height:38px;padding:8px 15px}
  .shop-contact{margin-top:12px;padding-top:12px}
  .shop-wechat-row{margin-top:5px}
  #shop-copy-status{margin-top:8px}
}
@media(max-width:360px){.shop-copy h2 br{display:block}}
/* Keep the whole cover clickable, with distinct web and local entry links. */
.card-main-link{text-decoration:none}
.card-main-link::after{content:"";position:absolute;inset:0;z-index:1}
.card-main-link:focus-visible{outline:none}
.card-detail:has(.card-main-link:focus-visible){outline:3px solid var(--red);outline-offset:3px}
.resource-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-shrink:0;width:100%;margin-top:auto;padding-top:10px;border-top:1px solid #a4a99b;font-size:12px}
.resource-actions a,.resource-actions button{position:relative;z-index:2;display:inline-flex;align-items:center;justify-content:center;gap:12px;text-decoration:none;font-weight:650;min-height:38px;border:1px solid var(--ink);border-radius:6px;padding:8px 12px}
.resource-web{background:var(--yellow)}
.resource-install{background:transparent}
.resource-actions a:hover,.resource-actions button:hover{background:var(--ink);color:var(--paper)}
.resource-unavailable{font-size:11px;color:var(--muted)}
@media(max-width:680px){.resource-actions{gap:8px;font-size:11px}.resource-actions a,.resource-actions button{padding:8px 10px;gap:8px}.resource-unavailable{font-size:10px}}
@media(max-width:360px){
  .site-header{padding-inline:14px}.site-header .brand{font-size:25px}.site-header nav{gap:10px}.site-header nav a{font-size:10px;white-space:nowrap}
  .resource-actions{font-size:10px}.resource-actions a,.resource-actions button{white-space:nowrap;padding:7px;gap:6px}
  .toolbox footer p{display:none}.skill-pagination{gap:8px}.skill-pagination>div{gap:9px}
}
@media(max-width:680px) and (max-height:600px){
  .card-detail .resource-type,.card-detail .resource-tags,.preview-caption{display:none}
  .section-heading p{font-size:10px;line-height:1.5}
  .card-detail{padding-inline:20px}.card-detail h3{font-size:21px}
}
/* Keep phone controls inside each page, including browser bars and safe areas. */
@media(max-width:760px){
  .toolbox{grid-template-rows:auto minmax(0,1fr) auto}
  .toolbox footer{display:none}
}
@media(max-width:680px){
  .site-header{height:calc(64px + env(safe-area-inset-top));padding-top:env(safe-area-inset-top)}
  .hero:has(.hero-with-portrait){padding-top:calc(76px + env(safe-area-inset-top));padding-bottom:max(16px,env(safe-area-inset-bottom))}
  .toolbox{padding-top:calc(78px + env(safe-area-inset-top));padding-bottom:max(12px,env(safe-area-inset-bottom))}
  .shop-screen{padding-top:calc(80px + env(safe-area-inset-top));padding-bottom:max(16px,env(safe-area-inset-bottom))}
}
@media(max-width:680px) and (max-height:600px){
  .site-header{height:calc(56px + env(safe-area-inset-top))}
  .hero:has(.hero-with-portrait),.toolbox,.shop-screen{padding-top:calc(68px + env(safe-area-inset-top));padding-bottom:max(10px,env(safe-area-inset-bottom))}
  .toolbox{gap:6px}
  .section-heading h2{font-size:25px}
  .card-page{padding-block:8px 12px}
  .card-detail{padding-top:40px;padding-bottom:12px}
  .shop-eyebrow{display:none}
  .shop-copy h2{font-size:25px;margin-bottom:8px}
  .shop-description{font-size:11px;margin-bottom:10px}
}
@media(max-width:680px) and (max-height:540px){
  .shop-preview{grid-template-columns:38% minmax(0,1fr);grid-template-rows:minmax(0,1fr);transform:none}
  .shop-window-bar,.shop-preview>p{display:none}
  .shop-preview img{grid-column:1;grid-row:1}
  .shop-preview-caption{grid-column:2;grid-row:1;flex-direction:column;align-items:flex-start;justify-content:center;gap:8px;border-top:0;padding:10px}
}
@media(max-width:1000px) and (max-height:500px) and (orientation:landscape){
  .site-header{height:calc(48px + env(safe-area-inset-top));padding:env(safe-area-inset-top) max(24px,env(safe-area-inset-right)) 0 max(24px,env(safe-area-inset-left))}
  .site-header .brand{font-size:25px}.site-header nav a{font-size:11px}
  .hero,.hero:has(.hero-with-portrait),.toolbox,.shop-screen{padding:calc(58px + env(safe-area-inset-top)) max(24px,env(safe-area-inset-right)) max(10px,env(safe-area-inset-bottom)) max(24px,env(safe-area-inset-left))}
  .hero-with-portrait{grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);grid-template-rows:minmax(0,1fr);gap:24px;text-align:left}
  .hero-with-portrait .hero-logo{max-width:250px;margin:0 0 8px}
  .hero-with-portrait h1{font-size:28px}.hero-with-portrait .intro{font-size:12px}
  .hero-portrait{height:100%;max-width:240px}.hero-portrait figcaption{font-size:8px}
  .hero-link{min-height:36px;padding:8px 14px;font-size:12px}
  .toolbox{grid-template-rows:auto minmax(0,1fr) auto;gap:6px}
  .section-heading h2{font-size:24px;margin:0}.section-heading p,.toolbox footer{display:none}
  .card-page{grid-template-columns:1fr;padding:6px 12px 10px}
  .playing-card{max-width:720px;margin:auto;transform:none}
  .card-detail{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);grid-template-rows:auto minmax(0,1fr) auto;gap:8px 18px;padding:32px 18px 12px}
  .card-detail .detail-art,.card-detail .resource-type,.card-detail .resource-tags,.preview-caption{display:none}
  .card-detail h3{grid-column:1;grid-row:1;font-size:22px;margin:0}
  .card-detail .resource-description{grid-column:1;grid-row:2;font-size:12px;margin:0}
  .resource-preview{grid-column:2;grid-row:1/4;height:100%;margin:0}
  .resource-actions{grid-column:1;grid-row:3;gap:8px;font-size:11px;padding-top:8px}
  .resource-actions a,.resource-actions button{min-height:34px;padding:6px 9px}.resource-unavailable{font-size:10px}
  .card-corner{display:flex;align-items:center;gap:4px;top:8px;left:18px;font-size:16px}.card-corner small{font-size:12px}
  .card-signature{top:11px;font-size:8px}
  .shop-screen{gap:8px}.shop-content{grid-template-columns:minmax(0,1fr) minmax(0,1fr);grid-template-rows:minmax(0,1fr);max-width:none;gap:28px}
  .shop-eyebrow{display:none}.shop-copy h2{font-size:25px;margin-bottom:8px}.shop-copy h2 br{display:none}
  .shop-description{font-size:11px;line-height:1.5;margin-bottom:10px}
  .shop-contact{margin-top:10px;padding-top:8px}.shop-contact label{font-size:10px}
  .shop-wechat-row{margin-top:5px}.shop-wechat-row input{font-size:24px}.shop-wechat-row button{font-size:11px;padding:8px 10px}
  #shop-copy-status{font-size:10px;margin-top:6px;min-height:0}
  .shop-preview{display:grid;min-height:0;max-height:100%;grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr) auto;transform:none}
  .shop-window-bar{display:flex;font-size:9px;padding:8px 12px}.shop-preview img{grid-column:1;grid-row:2;height:100%;min-height:0;object-fit:cover;object-position:top}
  .shop-preview-caption{grid-column:1;grid-row:3;flex-direction:row;align-items:center;padding:10px;font-size:10px;border-top:1px solid var(--line)}
  .shop-preview>p{display:none}.shop-end{padding-top:8px;font-size:10px}
}

/* Copy feedback floats above the page without changing the one-screen layout. */
.install-copy-notice{position:fixed;z-index:80;left:50%;bottom:max(20px,env(safe-area-inset-bottom));transform:translateX(-50%);width:min(460px,calc(100% - 28px));max-height:70dvh;overflow:auto;padding:20px 52px 20px 20px;border:1px solid var(--ink);border-radius:12px;background:var(--paper);color:var(--ink);box-shadow:0 12px 36px #17211726}.install-copy-notice strong{display:block;font-size:15px;line-height:1.6}.install-copy-notice p{margin:7px 0 0;font-size:12px;line-height:1.7;color:var(--muted)}.install-copy-close{position:absolute;right:5px;top:5px;width:40px;height:40px;border:0;background:transparent;font-size:23px}.install-copy-manual{display:block;width:100%;height:140px;margin-top:12px;padding:10px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--ink);font:inherit;font-size:12px;line-height:1.6;resize:none}