.preview-badge{position:absolute;top:14px;left:14px;display:inline-flex;align-items:center;gap:8px;background:#17191bea;color:#fff;border:1px solid #ffffff30;border-radius:30px;padding:9px 13px;font-size:11px;font-weight:700;letter-spacing:.04em}.preview-badge svg{width:17px;height:17px}.resource-cover{position:relative}.locked-action{background:#242629!important;border:1px solid #ffffff25!important;color:#dedede!important}.preview-gate{text-align:center;max-width:640px;margin:40px auto;padding:36px 24px;background:radial-gradient(ellipse at top,#ff8c1820,transparent 65%),#151617;border:1px solid #ffffff18;border-radius:24px}.gate-icon{width:76px;height:76px;display:grid;place-items:center;margin:0 auto 24px;border:1px solid #ff9f3650;border-radius:24px;color:#ffa743;background:#ff980f10}.gate-icon svg{width:36px;height:36px}.preview-gate .tag{display:block;margin-bottom:18px}.preview-gate h1{font-size:clamp(27px,5vw,40px);line-height:1.2}.preview-gate p{line-height:1.8;color:#c5c7ca;margin:22px 0 28px}.preview-return{display:block;margin-top:24px;text-decoration:underline;color:#ccc}.preview-reader{max-width:920px;padding-bottom:40px}.reader-title{text-align:center;max-width:690px;margin:24px auto}.reader-title h1{font-size:clamp(23px,4vw,34px);line-height:1.3;margin:14px 0}.reader-title p,.reader-hint{color:#aaaeb4;line-height:1.7;font-size:14px}.reader-toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:22px 0 12px}.reader-toolbar label{font-size:14px;color:#ddd}.reader-toolbar select{background:#252729;color:#fff;padding:12px;border:1px solid #ffffff30;border-radius:12px;font:inherit}.reader-toolbar .btn{padding:12px 16px;min-height:44px}.reader-progress{height:4px;background:#333;margin-bottom:16px;border-radius:8px;overflow:hidden}.reader-progress i{height:100%;background:#ffa640;display:block}.page-canvas{background:#fff;border-radius:12px;overflow:auto;box-shadow:0 12px 35px #0005}.page-canvas img{width:100%;height:auto;display:block;max-width:none}.page-canvas.zoomed img{width:200%;max-width:none}.reader-controls{display:flex;justify-content:space-between;align-items:center;gap:8px;position:sticky;bottom:12px;background:#17191af5;padding:12px;border:1px solid #ffffff20;border-radius:18px;margin-top:16px;box-shadow:0 10px 30px #0008;z-index:5}.reader-controls .btn{padding:13px 15px;min-height:48px;gap:8px}.reader-controls span{white-space:nowrap;font-size:13px;font-weight:700}.reader-controls [aria-disabled]{opacity:.35;pointer-events:none}.reader-hint{text-align:center}.support-preview{max-width:560px;margin:auto;text-align:center}.support-preview .support-portrait{margin:auto}.course-modules .course-module-icon{color:#ffab48}.lesson-row .ui-icon{flex-shrink:0;color:#ffa640}.resource-grid{align-items:stretch}.preview-gate .btn{white-space:normal}.course-site .course-dashboard{padding-bottom:40px}
@media(max-width:600px){.preview-reader{padding:22px 14px}.reader-controls{bottom:8px;padding:9px;gap:5px}.reader-controls .btn{padding:12px;font-size:12px}.reader-controls .ui-icon{width:17px}.preview-gate{padding:30px 18px;margin:24px auto}.preview-gate .btn{width:100%;font-size:13px}.preview-badge{font-size:10px}.reader-title p{font-size:13px}.page-canvas{border-radius:8px}.course-site header{position:sticky}.course-site .course-hero{margin-top:0}}
.reader-title h1,.preview-gate h1{text-transform:none;letter-spacing:-.035em}.reader-toolbar label{display:flex;align-items:center;gap:8px}
.page-canvas{perspective:1200px}.page-canvas:not(.zoomed) img{animation:page-turn .38s ease-out;transform-origin:left center}.turn-back .page-canvas:not(.zoomed) img{transform-origin:right center;animation-name:page-turn-back}@keyframes page-turn{from{opacity:.35;transform:rotateY(-12deg) translateX(12px)}to{opacity:1;transform:none}}@keyframes page-turn-back{from{opacity:.35;transform:rotateY(12deg) translateX(-12px)}to{opacity:1;transform:none}}
@media(max-width:700px){body.reading-preview{overflow:hidden;overscroll-behavior:none}body.reading-preview>header,body.reading-preview>footer{display:none}body.reading-preview #app{position:fixed;inset:0;height:100dvh;z-index:50;background:#101112;overflow:hidden;padding:0;margin:0}body.reading-preview .preview-reader{height:100%;width:100%;max-width:none;box-sizing:border-box;margin:0;padding:max(10px,env(safe-area-inset-top)) 12px max(8px,env(safe-area-inset-bottom));display:grid;grid-template-rows:26px 48px 3px minmax(0,1fr) 64px 20px;gap:7px}.reading-preview .reader-title{display:none}.reading-preview .back{margin:0;font-size:13px;align-self:center}.reading-preview .reader-toolbar{margin:0}.reading-preview .reader-toolbar label{font-size:12px}.reading-preview .reader-toolbar select{padding:9px}.reading-preview .reader-toolbar .btn{padding:10px 14px}.reading-preview .reader-progress{margin:0}.reading-preview .page-canvas{min-height:0;background:#18191b;box-shadow:none;border-radius:8px;overflow:auto;overscroll-behavior:contain}.reading-preview .page-canvas:not(.zoomed) img{width:100%;height:100%;object-fit:contain}.reading-preview .page-canvas.zoomed img{width:200%;height:auto;max-width:none;animation:none}.reading-preview .reader-controls{position:static;bottom:auto;margin:0;padding:7px;box-shadow:none;display:grid;grid-template-columns:1fr 48px 1fr}.reading-preview .reader-controls .btn{width:100%;min-height:46px;justify-content:center;padding:10px;font-size:13px}.reading-preview .reader-controls>span{text-align:center}.reading-preview .reader-hint{margin:0;font-size:11px;line-height:20px}.reading-preview .reader-end{height:100%;overflow:auto;display:grid;align-items:center;margin:0;padding:20px 16px}.reading-preview .preview-gate{margin:0 auto;width:100%;box-sizing:border-box}.reading-preview .preview-gate h1{font-size:28px}.reading-preview .preview-gate p{font-size:14px}}
@media(prefers-reduced-motion:reduce){.page-canvas img{animation:none!important}}
@media(max-width:700px){.reading-preview .preview-reader>.back{grid-row:1}.reading-preview .reader-toolbar{grid-row:2}.reading-preview .reader-progress{grid-row:3}.reading-preview .page-canvas{grid-row:4}.reading-preview .reader-controls{grid-row:5;height:64px;box-sizing:border-box;align-self:stretch}.reading-preview .reader-hint{grid-row:6}}
.page-canvas:not(.zoomed){overflow:hidden}
.preview-reader .reader-back{display:inline-flex;align-items:center;justify-content:center;gap:10px;width:fit-content;min-height:48px;padding:10px 18px;margin:0 0 16px;background:#ff9d2920;border:1px solid #ffad4966;border-radius:14px;color:#ffbd6b;font-size:14px;font-weight:700;text-decoration:none;position:relative;overflow:hidden;box-sizing:border-box;transition:background .2s,transform .2s}.reader-back-arrow{display:grid;place-items:center;transform:rotate(180deg)}.reader-back-arrow svg{width:22px;height:22px}.reader-back:after{content:'';position:absolute;inset:-50% auto -50% -65%;width:35%;background:linear-gradient(90deg,transparent,#ffc77944,transparent);transform:skewX(-20deg);animation:back-shimmer 4s ease-in-out infinite;pointer-events:none}.preview-reader .reader-back:hover{background:#ff9d2933}.preview-reader .reader-back:active{transform:scale(.98)}.preview-reader .reader-back:focus-visible{outline:3px solid #ffc779;outline-offset:3px}@keyframes back-shimmer{0%,55%{left:-65%}90%,100%{left:135%}}@media(max-width:700px){body.reading-preview .preview-reader{grid-template-rows:50px 48px 3px minmax(0,1fr) 64px 20px}.reading-preview .preview-reader>.reader-back{width:100%;height:50px;margin:0;align-self:stretch;font-size:14px}}@media(prefers-reduced-motion:reduce){.reader-back:after{animation:none}.preview-reader .reader-back{transition:none}}