/* Host palette: site/app/globals.css. Reading surfaces use solid, quieter colors. */
:root,html[data-theme="light"]{--ink:#153b32;--muted:#4e665e;--line:#738b7e;--paper:#fffdf7;--field:#faf9f1;--bg:#f5f3e9;--green:#1f765f;--selected:#dfeee5;--button-ink:#fffdf7;--hover:#e5ede3;--notice:#f7edd8;--focus:#8b4a18;--video:#112722;--reading:1.5rem;color-scheme:light}
html[data-theme="dark"]{--ink:#e2ede8;--muted:#b1c5bf;--line:#64867b;--paper:#10272a;--field:#0b1e23;--bg:#08181e;--green:#80c9b0;--selected:#203e3b;--button-ink:#0b211d;--hover:#24443f;--notice:#343323;--focus:#e5bd7d;--video:#000;color-scheme:dark}
*{box-sizing:border-box}html{font:100%/1.7 system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);scroll-behavior:auto}body{margin:0}button,a,textarea,select,summary{touch-action:manipulation}button,.button,select{font:inherit;font-size:1.25rem;line-height:1.45;border:1px solid var(--line);border-radius:10px;background:var(--paper);color:var(--ink);padding:12px 16px;min-height:56px;cursor:pointer;display:inline-flex;justify-content:center;align-items:center;text-align:center;text-decoration:none;overflow-wrap:anywhere}button:disabled{color:var(--muted);border-style:dashed;cursor:default}button:focus-visible,a:focus-visible,summary:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid var(--focus);outline-offset:4px}.primary,.tabs button[aria-pressed="true"]{background:var(--green);border-color:var(--green);color:var(--button-ink)}a{color:var(--green);text-underline-offset:4px}h1,h2,h3,p{margin:0 0 16px}h1{font-size:2rem;line-height:1.4;font-weight:600}h2{font-size:1.75rem;line-height:1.5;font-weight:600}h3{font-size:1.5rem;line-height:1.6}header{display:flex;justify-content:space-between;align-items:center;gap:18px;max-width:1360px;margin:auto;padding:22px 32px;border-bottom:1px solid var(--line)}.brand{font-size:1.4rem;display:flex;align-items:center;gap:12px;font-weight:600}.seal{display:grid;place-items:center;width:40px;height:44px;border:1px solid var(--green);border-radius:8px;color:var(--button-ink);background:var(--green);font-family:serif}.theme-tools{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.theme-tools button{min-width:76px}.theme-tools button[aria-pressed="true"]{border:2px solid var(--green);padding:11px 15px;background:var(--selected);font-weight:600}main{max-width:1360px;margin:auto;padding:28px 32px calc(32px + env(safe-area-inset-bottom))}.welcome{margin-bottom:20px}.welcome p{color:var(--muted);font-size:1.25rem}.eyebrow,.muted,.status,.basis,footer{font-size:1.125rem;color:var(--muted)}.eyebrow{margin-bottom:8px}.courses{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:28px}.course-card{display:block;text-align:left;padding:18px;min-width:0}.course-card[aria-pressed="true"]{border:2px solid var(--green);background:var(--selected);padding:17px}.course-card strong{display:block;font-size:1.5rem;font-weight:600}.course-card span{display:block;font-size:1.125rem;color:var(--muted);margin-top:6px}.study-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.08fr);gap:30px;align-items:start}.viewing,.reading{min-width:0}.course-heading{border-top:2px solid var(--green);padding-top:18px}.lesson-title{font-size:1.5rem}.viewing video{width:100%;display:block;aspect-ratio:16/9;object-fit:contain;background:var(--video);border-radius:10px}.play-tools{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:8px;margin-top:12px}.play-tools button{padding:12px 6px}.status{margin:12px 0;min-height:1.7em}.lesson-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;border-top:1px solid var(--line);padding-top:16px;margin:20px 0 12px}.notice{padding:18px;background:var(--notice);border:1px solid var(--line);border-radius:10px;font-size:1.25rem}.row{display:flex;flex-wrap:wrap;gap:10px}.rest-tools{border-top:1px solid var(--line);margin-top:20px;padding-top:16px;display:grid;grid-template-columns:auto minmax(0,1fr);gap:16px;align-items:start}.rest-tools label{display:block;font-size:1.125rem;margin:10px 0}.rest-tools select{display:block;width:100%;text-align:left}.rest-tools p{margin-top:12px}.rest-reminder{margin-top:16px}#restStatus:empty{display:none}#restStatus{margin-top:12px}.reading{border:1px solid var(--line);background:var(--paper);border-radius:12px;padding:24px;scroll-margin-top:16px}.reading-bar{display:flex;align-items:center;flex-wrap:wrap;justify-content:space-between;gap:14px;margin-bottom:18px}.reading-bar h2{font-size:1.6rem;margin:0}.font-tools{display:flex;align-items:center;flex-wrap:wrap;gap:10px}.font-tools button{padding:10px 12px;font-size:1.125rem}.font-tools span{font-size:1.125rem;color:var(--muted)}.tabs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-bottom:24px}.panel{font-size:var(--reading);line-height:1.85;overflow-wrap:anywhere}.panel h3{font-size:1.08em;font-weight:600;line-height:1.6}.panel p{margin-bottom:24px}.panel small,.basis{font-size:1.125rem;line-height:1.75;color:var(--muted)}.current-guide{background:var(--selected);border-left:4px solid var(--green);padding:18px;margin-bottom:28px}.current-guide p:last-child{margin-bottom:0}.panel .button{font-size:1.25rem;margin:8px 0}.download{display:flex!important;width:100%}.note-block{padding:12px 0;border-bottom:1px solid var(--line);margin-bottom:18px}.note-block:last-child{border-bottom:0}.catalog-list{list-style:none;padding:0;margin:0}.catalog-list li+li{margin-top:10px}.lesson-item{width:100%;display:grid;grid-template-columns:2em minmax(0,1fr);gap:8px;text-align:left;justify-content:start;font-size:1.375rem;padding:16px 12px}.lesson-item[aria-current="true"]{border:2px solid var(--green);background:var(--selected)}.lesson-item small{grid-column:2}.lesson-number{color:var(--muted)}.panel details{border-top:1px solid var(--line);padding:16px 0}.panel details>div{padding-top:16px}summary{font-size:1.25rem;cursor:pointer;min-height:56px;padding:10px 0}.material{display:block!important;text-align:left!important;justify-content:start!important;width:100%;margin:12px 0!important}.material small{display:block;margin-top:6px}.material-wrap{display:block}.panel textarea{font:inherit;line-height:1.85;width:100%;min-width:0;border:1px solid var(--line);border-radius:8px;padding:16px;color:var(--ink);background:var(--field);margin-top:16px;resize:vertical}.panel label{display:block;font-size:1.25rem}footer{margin-top:36px;border-top:1px solid var(--line);padding-top:20px}footer p{margin-bottom:12px}footer details{max-width:900px}.skip{position:absolute;top:-160px;background:var(--paper);padding:12px;z-index:10}.skip:focus{top:0}[hidden]{display:none!important}
@media(hover:hover){button:not(:disabled):hover,.button:hover{background:var(--hover);color:var(--ink)}.primary:not(:disabled):hover{outline:2px solid var(--green);outline-offset:2px;background:var(--green);color:var(--button-ink)}}
@media(max-width:960px){.study-grid{grid-template-columns:minmax(0,1fr)}.viewing{max-width:760px;width:100%;margin:auto}.reading{max-width:760px;width:100%;margin:auto}.courses{gap:10px}.course-card{padding:14px}.course-card[aria-pressed="true"]{padding:13px}}
@media(max-width:600px){header{padding:16px max(16px,env(safe-area-inset-right)) 16px max(16px,env(safe-area-inset-left));align-items:stretch;flex-direction:column;gap:16px}.brand{font-size:1.4rem}.theme-tools{width:100%}.theme-tools button{min-width:0;font-size:1.25rem}main{padding:22px max(16px,env(safe-area-inset-right)) calc(28px + env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left))}.courses{grid-template-columns:minmax(0,1fr);gap:10px;margin-bottom:26px}.course-card{padding:14px 16px;min-height:94px}.course-card[aria-pressed="true"]{padding:13px 15px}.course-card strong{font-size:1.4rem}.course-heading h2{font-size:1.65rem}.reading{padding:20px 16px}.play-tools{grid-template-columns:repeat(2,minmax(0,1fr))}.play-tools #play{grid-column:1/-1;font-size:1.5rem;min-height:64px}.lesson-nav button{padding:12px 4px}.study-grid{gap:24px}.current-guide{padding:14px}.rest-tools{grid-template-columns:minmax(0,1fr)}.rest-tools>button{width:100%}.row>*{flex:1 1 140px}.tabs button{padding:12px 6px}}
@media(max-width:350px){.reading{padding:16px 12px}.reading-bar{display:block}.font-tools{margin-top:14px;gap:8px}.font-tools button{padding:10px}.theme-tools{gap:6px}.lesson-item{font-size:1.25rem}.lesson-nav button{font-size:1.125rem}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
@media(forced-colors:active){button[aria-pressed="true"],.lesson-item[aria-current="true"]{outline:2px solid Highlight}.primary{border:2px solid ButtonText}}

.catalog-topics{padding:16px;margin-bottom:20px;border:1px solid var(--line);border-radius:10px;background:var(--field)}
.panel .catalog-topics label{font-size:1em;font-weight:600;margin-bottom:10px}
.catalog-topics select{display:block;width:100%;min-width:0;max-width:100%;font-size:var(--reading);text-align:left}
.panel .catalog-topics p{font-size:1em;margin:14px 0}
.catalog-topics button{width:100%;font-size:var(--reading)}
.panel .catalog-result{font-weight:600;margin-bottom:16px}