:root{color-scheme:light;--ink:#203e40;--muted:#4f6668;--accent:#28676b;--paper:#f3f7f5;--line:#c7d7d2}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--paper);font:17px/1.75 system-ui,-apple-system,"Noto Sans TC",sans-serif}header{display:flex;align-items:center;justify-content:space-between;padding:10px max(24px,calc((100vw - 960px)/2));border-bottom:1px solid var(--line);gap:20px;background:#fff}header img{display:block;width:164px;height:92px;object-fit:contain}header span{font-size:14px;color:var(--muted)}main{max-width:960px;padding:30px 24px 56px;margin:auto}a{color:var(--accent);text-underline-offset:4px}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #af761e;outline-offset:4px}.back{font-size:15px}.intro{padding:38px 0 32px}.eyebrow{font-size:14px;letter-spacing:.08em;color:var(--accent)}h1{font-size:clamp(36px,7vw,62px);line-height:1.3;letter-spacing:.03em;margin:16px 0 24px;font-weight:600}h2{font-size:clamp(23px,4vw,30px);line-height:1.45;margin:12px 0}h3{font-size:18px;margin:12px 0}.speaker{font-size:20px}.card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:clamp(22px,5vw,42px);margin-bottom:26px;box-shadow:0 8px 32px #203e4006}fieldset{padding:0;border:0;margin:24px 0}legend{font-size:16px;margin-bottom:14px}label{display:block;margin-top:20px;font-weight:600}input:not([type=checkbox]),textarea{width:100%;display:block;margin-top:8px;border:1px solid #819a96;border-radius:8px;padding:12px;background:#fff;color:var(--ink);font:inherit}input:disabled{background:#f1f4f3}textarea{resize:vertical;min-height:260px}.hint{font-size:14px;color:var(--muted)}.notice{background:#f4f7f5;border-radius:10px;padding:14px 20px;margin-top:24px;font-size:16px}.consent{display:flex;align-items:flex-start;gap:12px;font-size:16px}.consent input{width:22px;height:22px;flex:none;margin-top:5px;accent-color:var(--accent)}button,.button{font:inherit;font-weight:600;border-radius:9px;padding:13px 22px;background:var(--accent);color:#fff;border:1px solid var(--accent);cursor:pointer;display:inline-block;text-align:center;text-decoration:none;min-height:48px}button:disabled{opacity:.55;cursor:not-allowed}.actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:24px}.actions .button{background:#fff;color:var(--accent)}#lecture-collection-status,#lecture-copy-status{font-size:16px;overflow-wrap:anywhere}pre{white-space:pre-wrap;overflow-wrap:anywhere;font:inherit;font-size:16px;background:#f3f7f5;padding:20px;border-radius:10px}footer{text-align:center;font-size:14px;color:var(--muted);padding:20px 0}[hidden]{display:none!important}@media(max-width:520px){header{padding:8px 20px}header span{max-width:100px}main{padding:24px 16px 40px}.card{border-radius:14px}.actions>*{width:100%}form>button{width:100%}}

/* Keep the manual LINE step visible before submission and immediately after receipt. */
.registration-guide{border:1px solid #aac9c2;border-top:4px solid var(--accent);border-radius:14px;background:#edf5f1;padding:24px;margin-bottom:30px}
.registration-guide .eyebrow{margin:0;font-weight:600}
.registration-guide h2{font-size:clamp(24px,4vw,30px);margin:6px 0 20px}
.registration-steps{display:grid;grid-template-columns:1fr 1.4fr 1fr;gap:12px;list-style:none;padding:0;margin:0}
.registration-steps li{min-width:0;display:flex;align-items:flex-start;gap:10px;padding:14px 12px;border:1px solid #d0dfd9;border-radius:10px;background:#fff}
.registration-steps .line-step{border-color:#91b7ad;background:#e0eee7}
.step-number{flex:none;font-size:14px;font-weight:700;line-height:28px;width:28px;text-align:center;border-radius:50%;background:#e5efeb;color:var(--accent)}
.line-step .step-number{background:var(--accent);color:#fff}
.registration-steps strong{display:block;font-size:16px;line-height:1.55;font-weight:650}
.registration-steps div>span{display:block;margin-top:6px;font-size:14px;line-height:1.6;color:var(--muted)}
.seat-note{font-size:16px;font-weight:600;margin:16px 0 0}
.success-card{padding:0;overflow:hidden;border-color:var(--accent);scroll-margin-top:20px}
.manual-review-banner{padding:clamp(22px,5vw,42px);background:var(--accent);color:#fff}
.manual-review-banner .eyebrow{color:#e0eee7;margin:0;font-weight:600}
.manual-review-banner h2{font-size:clamp(29px,5vw,38px);line-height:1.4;margin:10px 0 14px}
.registration-guide h2 span,.manual-review-banner h2 span{display:inline-block}
.seat-warning{display:inline-block;border:1px solid #97bab0;background:#1e5154;border-radius:7px;padding:7px 12px;font-size:16px;font-weight:650;margin:0}
.manual-review-instruction{margin:18px 0 0;font-size:18px;line-height:1.65}
.manual-review-banner .actions{margin-top:20px;gap:12px}
.manual-review-banner button{background:#fff;color:#1e5154;border-color:#fff}
.manual-review-banner .button{background:#e0eee7;color:#1e5154;border-color:#e0eee7}
.manual-review-banner :is(button,a,h2):focus-visible{outline:3px solid #f3d79a;outline-offset:4px}
.manual-review-banner #lecture-copy-status{margin:14px 0 0;color:#fff}
.review-wait{border-top:1px solid #6a9997;padding-top:14px;margin:18px 0 0;font-size:16px;color:#e0eee7}
.success-details{padding:12px clamp(22px,5vw,42px) clamp(22px,5vw,42px)}
@media(max-width:680px){.registration-steps{grid-template-columns:1fr}.registration-steps li{padding:12px}.registration-steps div>span{margin-top:3px}.registration-guide{padding:20px}.manual-review-banner .actions>*{width:100%}}

/* Both approved free-lecture sessions share the same intake. */
.session-picker{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:28px}.session-picker>.field-label,.session-picker>.hint{grid-column:1/-1;margin:0}.session-choice{display:flex;gap:12px;align-items:flex-start;margin:0;padding:18px;border:1px solid var(--line);border-radius:8px;cursor:pointer;min-width:0}.session-choice:has(input:checked){outline:2px solid var(--accent);background:#edf5f1}.session-choice input{width:20px!important;height:20px;margin:7px 0 0!important;accent-color:var(--accent);flex:none}.session-choice>span{min-width:0}.session-choice small,.session-choice span>span{display:block;font-size:14px}.session-choice strong{display:block;font-size:27px;line-height:1.6}@media(max-width:560px){.session-picker{grid-template-columns:1fr}}

/* Local QR and explicit manual handoff. No identity or seat assertion. */
.line-next-steps{list-style:none;padding:0;margin:24px 0;display:grid;gap:22px}.line-next-steps li{min-width:0;border-top:1px solid #6a9997;padding-top:18px}.line-next-steps h3{font-size:22px;line-height:1.5;margin:0 0 10px}.line-next-steps p{font-size:16px;line-height:1.7;overflow-wrap:anywhere}.official-line-qr{display:block;width:256px;max-width:100%;height:auto;margin:18px auto;background:#fff}.line-next-steps .actions{flex-wrap:wrap}.line-next-steps .actions>*{min-height:48px;white-space:normal;text-align:center;box-sizing:border-box}@media(max-width:480px){.line-next-steps h3{font-size:20px}.line-next-steps .actions>*{width:100%}}

/* Successful receipt is gratitude, not a seat confirmation. */
.manual-review-banner .thank-you-title{font-size:clamp(36px,6vw,54px);line-height:1.35;color:#fff4d6;margin:14px 0}.thank-you-copy{font-size:20px;line-height:1.7;margin:16px 0 22px}.line-next-steps .line-access-note{padding:16px 18px;border:1px solid #ccddcf;border-left:4px solid #ecd29a;background:#ffffff0d;border-radius:4px}.line-access-note strong{color:#fff4d6}