/* Native CSS. A restrained interface inspired by the project's existing minimal UI.
   Shape scale: 8px controls, 12px cards and panels; no external fonts or icon runtime. */
:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:#17221e;background:#fcfdfc;font-synthesis:none;--green:#176b50;--green-hover:#11513d;--muted:#5d6b64;--line:#dce4df;--pale:#edf4ef;--radius:12px}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}button{color:inherit}button:disabled{cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,[tabindex="-1"]:focus-visible{outline:3px solid var(--green);outline-offset:4px}input:focus-visible,select:focus-visible{outline-offset:1px}::selection{background:#d3e9db}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:20px;top:-100px;z-index:100;background:#fff;border:2px solid var(--green);padding:12px}.skip-link:focus{top:12px}.site-header,.site-footer,main{max-width:1320px;margin-inline:auto;padding-inline:48px}.site-header{height:88px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:inline-flex;gap:11px;align-items:center;font-size:26px;letter-spacing:-1.3px;font-weight:750}.brand-mark{width:33px;height:33px;background:var(--green);color:#fff;border-radius:8px;display:grid;place-items:center;font-size:28px;line-height:1;padding-bottom:3px;letter-spacing:-2px}.brand-dot{color:var(--green)}.header-right{display:flex;align-items:center;gap:24px}.header-label{font-size:13px;color:var(--muted)}.header-divider{height:16px;width:1px;background:var(--line)}.language-button{display:inline-flex;justify-content:center;align-items:center;gap:10px;min-width:44px;min-height:44px;font-size:13px;font-weight:600;border:0;background:transparent;border-radius:8px}.language-button:hover{background:var(--pale)}
.intro{padding:64px 0 62px;display:grid;grid-template-columns:1.3fr 1fr;align-items:center;gap:80px}.eyebrow{display:flex;align-items:center;gap:9px;font-size:12px;color:var(--green);font-weight:600;letter-spacing:.035em;margin:0 0 20px}.status-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--green);flex:none}h1{font-size:clamp(35px,4vw,53px);line-height:1.33;letter-spacing:-.05em;font-weight:650;margin:0 0 20px}h1 span{color:var(--green)}.intro-description{max-width:410px;font-size:15px;line-height:1.85;color:var(--muted);margin:0 0 26px}.button{min-height:44px;padding:11px 17px;display:inline-flex;justify-content:center;align-items:center;gap:12px;font-size:13px;font-weight:600;border:1px solid transparent;border-radius:8px;white-space:nowrap;transition:background .16s,border-color .16s,transform .16s}.button:active{transform:translateY(1px)}.primary{background:var(--green);color:#fff}.primary:hover{background:var(--green-hover)}.secondary{background:#fff;border-color:var(--line)}.secondary:hover{border-color:#9aac9f;background:#f6f9f6}.intro-cta{gap:34px}.intro-guide{border-left:1px solid var(--line);padding:10px 0 8px 44px}.guide-heading{font-size:15px;font-weight:650;margin:0 0 24px}.guide-steps{list-style:none;padding:0;margin:0;display:grid;gap:23px}.guide-steps li{display:flex;gap:19px;align-items:baseline}.guide-steps li>span{font-family:ui-monospace,monospace;font-size:11px;color:#718075}.guide-steps strong{font-size:14px;font-weight:600}.guide-steps p{font-size:12px;color:var(--muted);margin:7px 0 0;line-height:1.6}.guide-note{display:flex;gap:9px;font-size:11px;color:var(--muted);margin:25px 0 0;line-height:1.7}
.gallery{scroll-margin-top:24px;padding-top:30px;border-top:1px solid var(--line)}.gallery-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px}h2{font-weight:600;letter-spacing:-.025em}.gallery-heading h2{font-size:22px;margin:0}.total-count{font-size:12px;color:var(--muted)}.filter-bar{display:flex;justify-content:space-between;gap:22px;align-items:center}.category-filters{display:flex;gap:5px;flex-wrap:wrap}.category-button{font-size:12px;font-weight:500;padding:10px 14px;min-height:42px;white-space:nowrap;border:1px solid transparent;background:transparent;border-radius:8px;color:var(--muted)}.category-button:hover{background:#f0f4f1}.category-button[aria-pressed="true"]{color:var(--green);background:var(--pale);border-color:#d5e5da}.search-wrap{position:relative;min-width:228px}.search-symbol{position:absolute;left:13px;top:6px;font-size:26px;color:var(--muted);pointer-events:none}input[type="search"]{height:44px;width:100%;border:1px solid var(--line);border-radius:8px;padding:10px 13px 10px 39px;background:#fff;font-size:12px;color:#17221e}input::placeholder{color:#657169}.results-caption{font-size:11px;color:var(--muted);margin:18px 0 16px;min-height:17px}.app-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:25px}.app-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:border-color .2s,box-shadow .2s}.app-card:hover{border-color:#a7bcad;box-shadow:0 6px 20px #214d3410}.preview-link{display:block;position:relative;aspect-ratio:1.7;background:#f0f4f1;border-bottom:1px solid var(--line);padding:16px 16px 0;overflow:hidden}.preview-link img{display:block;width:100%;height:100%;object-fit:cover;object-position:left top;border:1px solid #d9e1dc;border-bottom:0;border-radius:5px 5px 0 0;background:#fff;transition:transform .3s;transform-origin:top center}.app-card:hover .preview-link img{transform:translateY(-2px)}.preview-link::after{content:"";position:absolute;inset:0;pointer-events:none;box-shadow:inset 0 -8px 14px #24402a05}.preview-unavailable{height:100%;display:grid;place-items:center;font-size:12px;color:var(--muted)}.card-content{display:flex;flex:1;flex-direction:column;padding:21px 22px 19px}.card-meta{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:12px}.category-label{font-size:10px;font-weight:600;letter-spacing:.02em;color:var(--green)}.card-number{font-family:ui-monospace,monospace;font-size:10px;color:#718075}.card-title{font-size:18px;font-weight:650;letter-spacing:-.025em;line-height:1.4;margin:0 0 8px}.card-description{font-size:12px;line-height:1.85;color:var(--muted);margin:0 0 17px;min-height:44px}.card-task{display:flex;gap:9px;align-items:flex-start;padding-top:13px;border-top:1px solid #e9eeea;font-size:11px;line-height:1.8;margin:auto 0 17px;color:#53655a}.card-task strong{font-weight:600;flex:none;color:#384f41}.card-actions{display:flex;gap:8px;align-items:center;justify-content:space-between}.card-actions .button{padding:9px 13px;min-height:42px;font-size:12px}.direct-link{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;font-size:17px;color:var(--muted);border:1px solid var(--line);border-radius:8px}.direct-link:hover{background:var(--pale);color:var(--green)}.card-host{font-size:10px;color:var(--muted);margin-left:auto}.empty-state{padding:60px 20px;text-align:center;border:1px dashed var(--line);border-radius:12px}.empty-mark{font-size:34px;color:var(--muted)}.empty-state h3{font-size:18px;font-weight:600}.empty-state p{font-size:14px;color:var(--muted);margin-bottom:22px}.closing-note{margin:64px 0 0;padding:32px 0 38px;border-top:1px solid var(--line);display:flex;gap:24px;align-items:flex-start}.closing-mark{color:var(--green);font-size:32px;font-weight:750;line-height:1}.closing-note h2{font-size:17px;margin:0 0 10px}.closing-note p{color:var(--muted);font-size:12px;line-height:1.9;max-width:670px;margin:0}.site-footer{border-top:1px solid var(--line);min-height:74px;display:flex;justify-content:space-between;gap:20px;align-items:center;color:var(--muted);font-size:11px}.site-footer>span:first-child{font-weight:600}.site-footer>span:first-child span{font-weight:400;margin-left:7px}
body:has(dialog[open]){overflow:hidden}dialog{border:0;padding:0;color:#17221e;background:#fcfdfc;border-radius:12px;width:calc(100vw - 40px);max-width:1800px;height:calc(100dvh - 40px);max-height:calc(100dvh - 40px);overflow:hidden;box-shadow:0 24px 100px #12341c35}dialog[open]{display:flex;flex-direction:column}dialog::backdrop{background:#14281ddb;backdrop-filter:blur(3px)}.viewer-topbar{display:flex;align-items:center;justify-content:space-between;gap:15px;min-height:76px;padding:14px 20px;border-bottom:1px solid var(--line);background:#fff;flex-shrink:0}.back-button{background:transparent;padding-inline:8px;font-size:12px}.back-button:hover{background:var(--pale)}.viewer-tools{display:flex;gap:10px;align-items:center}.viewer-layout{display:grid;grid-template-columns:275px minmax(0,1fr);flex:1;min-height:0}.viewer-sidebar{padding:25px 23px;overflow:auto;border-right:1px solid var(--line);background:#fff}.viewer-sidebar>label{display:block;font-size:11px;color:var(--muted);margin:0 0 9px}.viewer-sidebar select{width:100%;height:44px;border:1px solid var(--line);border-radius:8px;background:#fcfdfc;padding:0 10px;font-size:12px;color:#17221e}.viewer-identity{padding-top:29px}.viewer-identity h2{font-size:22px;line-height:1.45;margin:10px 0}.viewer-identity p{font-size:12px;line-height:1.85;color:var(--muted)}.task-section{margin-top:26px;padding-top:22px;border-top:1px solid var(--line)}.task-section h3{font-size:14px;font-weight:600;margin:0 0 17px}.task-section ol{padding:0;list-style:none;counter-reset:task;display:grid;gap:17px}.task-section li{position:relative;counter-increment:task;padding-left:28px;font-size:12px;line-height:1.85;color:#4e6055}.task-section li::before{content:counter(task);position:absolute;left:0;top:1px;font-size:10px;color:var(--green);width:19px;height:19px;display:grid;place-items:center;background:var(--pale);border-radius:50%}.outcome{margin-top:25px;padding:17px;background:var(--pale);border-radius:8px}.outcome strong{font-size:11px;color:var(--green);font-weight:650}.outcome p{font-size:11px;line-height:1.8;color:#41594a;margin:8px 0 0}.viewer-note{font-size:10px;color:var(--muted);line-height:1.8;margin:25px 0 0}.viewer-stage{display:flex;flex-direction:column;min-height:0;min-width:0;background:#f0f4f1}.stage-bar{min-height:43px;padding:8px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);flex-shrink:0}.stage-bar>span{display:flex;align-items:center;gap:8px;font-size:10px;color:var(--muted)}.text-button{border:0;background:transparent;padding:8px 0;min-height:32px;font-size:11px;color:var(--green);text-decoration:underline;text-underline-offset:3px}.viewer-help{padding:10px 17px;background:#fff;border-bottom:1px solid var(--line);font-size:12px;color:var(--muted);line-height:1.7}.viewer-help p{margin:0}.frame-slot{position:relative;flex:1;min-height:0;background:#fff;overflow:hidden}.frame-slot iframe{display:block;width:100%;height:100%;border:0;background:#fff}.loading-note{position:absolute;z-index:1;left:16px;top:16px;padding:12px 15px;background:#fff;border:1px solid var(--line);border-radius:8px;color:var(--muted);font-size:12px;box-shadow:0 2px 12px #12341c10;pointer-events:none}.direct-state{max-width:480px;margin:80px auto;padding:30px;text-align:center}.direct-state h3{font-size:22px;font-weight:600}.direct-state p{font-size:14px;color:var(--muted);line-height:1.8}.direct-state .button{margin-top:12px}.share-fallback{padding:15px 20px;background:#fff;border-top:1px solid var(--line)}.share-fallback label{display:block;font-size:12px;color:var(--muted);margin-bottom:9px}.share-fallback>div{display:flex;gap:10px}.share-fallback input{width:100%;min-width:0;padding:10px;border:1px solid var(--line);border-radius:8px;font-size:12px}.toast{position:fixed;left:50%;bottom:25px;transform:translateX(-50%);z-index:100;background:#fff;color:#17221e;border:1px solid var(--line);box-shadow:0 5px 25px #12341c20;border-radius:8px;padding:14px 20px;font-size:13px;max-width:calc(100vw - 32px)}
@media(min-width:1500px){.viewer-sidebar{padding:30px}.viewer-layout{grid-template-columns:300px minmax(0,1fr)}}
@media(max-width:1100px){.site-header,.site-footer,main{padding-inline:30px}.intro{gap:40px}.intro-guide{padding-left:28px}.app-grid{gap:18px}.card-content{padding:18px}.card-host{display:none}.filter-bar{gap:12px}.category-button{padding-inline:10px}.search-wrap{min-width:200px}.viewer-layout{grid-template-columns:245px minmax(0,1fr)}.viewer-sidebar{padding:20px}}
@media(max-width:800px){.app-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.intro{grid-template-columns:1.2fr 1fr;gap:26px;padding-block:44px}.intro-guide{padding-left:23px}.guide-steps{gap:17px}.guide-steps li{gap:11px}.guide-heading{font-size:13px}.guide-steps strong{font-size:12px}.guide-steps p{font-size:11px}.intro-description{font-size:13px}.filter-bar{align-items:stretch;flex-direction:column}.search-wrap{width:100%}.viewer-topbar{padding:12px;min-height:70px}.viewer-tools{gap:6px}.viewer-tools .button{font-size:11px;padding-inline:11px}.viewer-layout{grid-template-columns:215px minmax(0,1fr)}.viewer-sidebar{padding:18px}.viewer-identity h2{font-size:19px}.viewer-identity{padding-top:20px}}
@media(max-width:600px){.site-header,.site-footer,main{padding-inline:20px}.site-header{height:72px}.brand{font-size:24px}.brand-mark{width:30px;height:30px;font-size:26px}.header-right{gap:12px}.header-label{font-size:11px}.header-divider{display:none}.intro{grid-template-columns:1fr;padding:36px 0;gap:30px}.intro-copy{max-width:420px}h1{font-size:39px;line-height:1.35;letter-spacing:-.045em}.eyebrow{font-size:11px;margin-bottom:18px}.intro-description{font-size:14px;max-width:330px}.intro-guide{border-left:0;border-top:1px solid var(--line);padding:23px 0 0}.guide-heading{font-size:13px;margin-bottom:19px}.guide-steps{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.guide-steps li{display:block}.guide-steps li>span{display:block;margin-bottom:8px}.guide-steps strong{font-size:11px;line-height:1.7}.guide-steps p{display:none}.guide-note{margin-top:18px;font-size:10px}.gallery{padding-top:25px}.gallery-heading{align-items:flex-start;margin-bottom:20px;gap:10px}.gallery-heading h2{font-size:18px;line-height:1.5}.total-count{font-size:10px;white-space:nowrap;margin-top:5px}.category-filters{gap:4px}.category-button{font-size:11px;padding-inline:10px;min-height:40px}.results-caption{margin-top:15px}.app-grid{grid-template-columns:1fr;gap:20px}.preview-link{aspect-ratio:1.75;padding:18px 18px 0}.card-content{padding:20px}.card-title{font-size:20px}.card-description{font-size:13px;min-height:0}.card-task{font-size:12px}.card-actions .button{min-height:44px;font-size:13px}.card-host{display:block}.closing-note{margin-top:42px;padding-top:27px;gap:18px}.closing-note h2{font-size:16px}.closing-note p{font-size:12px}.site-footer{flex-wrap:wrap;padding-block:21px;gap:12px;font-size:10px}dialog{width:100vw;height:100dvh;max-width:100vw;max-height:100dvh;margin:0;border-radius:0}.viewer-topbar{gap:5px;padding:9px 10px;min-height:64px}.back-button{gap:5px;padding:10px 2px;font-size:11px}.viewer-tools{gap:2px}.viewer-tools .button{font-size:10px;gap:4px;padding-inline:8px}.viewer-tools .language-button{font-size:11px;min-width:36px}.viewer-layout{display:flex;flex-direction:column;overflow:auto}.viewer-sidebar{overflow:visible;flex:none;border-right:0;border-bottom:1px solid var(--line);padding:17px 20px;display:grid;grid-template-columns:1fr;gap:0}.viewer-sidebar>label{font-size:10px}.viewer-identity{padding-top:15px}.viewer-identity h2{font-size:19px;margin:5px 0}.viewer-identity p{margin:7px 0 0;font-size:11px}.task-section{margin-top:16px;padding-top:13px}.task-section h3{font-size:12px;margin-bottom:10px}.task-section ol{gap:8px;margin:0}.task-section li{font-size:11px;line-height:1.7}.outcome{margin-top:15px;padding:12px}.outcome p{margin-top:4px}.viewer-note{margin-top:12px;font-size:10px}.viewer-stage{flex:none;min-height:600px;height:80dvh;width:100%}.stage-bar{padding-inline:12px}.frame-slot{min-height:0}.direct-state{margin:40px auto;padding:25px}.share-fallback{padding:12px}.share-fallback input{font-size:10px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

/* A phone keeps the app itself in reach; the task guide expands on demand. */
.practice-guide>summary{display:none}.language-button{white-space:nowrap;flex-shrink:0}
@media(min-width:601px){.practice-guide:not([open])>*:not(summary){display:block}}
@media(max-width:600px){.practice-guide{margin-top:16px;border-top:1px solid var(--line)}.practice-guide>summary{display:list-item;cursor:pointer;font-size:12px;font-weight:600;min-height:44px;padding-block:14px;color:var(--green)}.practice-guide .task-section{margin-top:0;padding-top:0;border-top:0}.practice-guide .task-section h3{display:none}.practice-guide .viewer-note{margin-bottom:0}}
@media(max-width:360px){.viewer-topbar{flex-wrap:wrap;gap:4px}.back-button{flex:1;justify-content:flex-start}.viewer-tools{display:contents}#share-viewer{order:2}#viewer-language{order:3}#external{order:4;flex:1 0 100%;margin-top:3px}.viewer-topbar .button{font-size:11px}}

/* Unified app artwork fills the cover area; screenshots stay archived separately. */
.preview-link{aspect-ratio:8/5;padding:0;background:#eaf1ec}
.preview-link img{object-position:center;transform-origin:center;border:0;border-radius:0;background:#eaf1ec}
.preview-link::after{box-shadow:none}
.app-card:hover .preview-link img{transform:scale(1.025)}