/* Phase 13 — free stability, beta and mobile polish */
.s13-overlay{position:fixed;inset:0;z-index:1000030;background:rgba(15,23,42,.68);display:flex;align-items:flex-end;justify-content:center;padding:16px;backdrop-filter:blur(4px)}
.s13-sheet{width:min(720px,100%);max-height:min(90vh,880px);overflow:auto;background:#fff;border-radius:26px 26px 18px 18px;box-shadow:0 24px 70px rgba(15,23,42,.32)}
.s13-sheet>header{position:sticky;top:0;z-index:2;background:rgba(255,255,255,.97);display:grid;grid-template-columns:48px 1fr 40px;gap:12px;align-items:center;padding:17px;border-bottom:1px solid #e7ebf2}.s13-sheet>header img{width:48px;height:48px;border-radius:15px;object-fit:cover}.s13-sheet>header h2{font-size:19px;margin:0;color:#172033}.s13-sheet>header p{font-size:12px;color:#667085;margin:3px 0 0}.s13-sheet>header button{width:40px;height:40px;border:0;border-radius:50%;background:#f1f4f8;font-size:25px;color:#344054}
#s13-body{padding:17px}.s13-free,.s13-note,.s13-beta-note{padding:12px 14px;border-radius:14px;background:#effaf3;color:#176b36;font-weight:800;font-size:13px;margin-bottom:12px}.s13-note{background:#eef4ff;color:#173f8a}.s13-note p{margin:5px 0 0;font-weight:500;line-height:1.5}
.s13-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.s13-card{min-height:100px;border:1px solid #dfe5ef;background:#fff;border-radius:17px;padding:14px;display:grid;grid-template-columns:36px 1fr auto;gap:9px;align-items:start;text-align:left;box-shadow:0 4px 14px rgba(15,23,42,.04)}.s13-card>b{font-size:25px}.s13-card span strong,.s13-card span small{display:block}.s13-card span strong{font-size:14px;color:#172033}.s13-card span small{font-size:11px;line-height:1.45;color:#667085;margin-top:4px}.s13-card i{font-style:normal;color:#98a2b3;font-size:22px}
.s13-links{display:flex;gap:8px;flex-wrap:wrap;margin:13px 0}.s13-links a{padding:9px 12px;border-radius:12px;background:#f3f6fb;color:#155eef;text-decoration:none;font-weight:800;font-size:12px}
.s13-primary{border:0;border-radius:14px;background:#155eef;color:#fff;padding:13px 16px;min-height:48px;font-weight:900;font-size:14px}.s13-checks{display:grid;gap:8px;margin-top:12px}.s13-check{display:grid;grid-template-columns:34px 1fr auto;gap:9px;align-items:center;border:1px solid #e4e9f1;border-radius:14px;padding:11px}.s13-check>span{font-size:21px}.s13-check b,.s13-check small{display:block}.s13-check b{font-size:13px}.s13-check small{font-size:11px;color:#667085;margin-top:2px}.s13-check>strong{font-size:11px}.s13-check.ok{background:#f6fff8;border-color:#b8e8c5}.s13-check.ok>strong{color:#187a37}.s13-check.warn{background:#fffaf0;border-color:#f3d798}.s13-check.warn>strong{color:#975a00}.s13-loading{text-align:center;padding:30px;color:#667085}
.s13-vault{display:grid;gap:12px}.s13-vault-sec{border:1px solid #e1e6ee;border-radius:17px;padding:13px}.s13-vault-sec h3{margin:0 0 9px;font-size:16px;color:#173f8a}.s13-vault-sec article{padding:9px 0;border-top:1px dashed #e7ebf2}.s13-vault-sec article:first-of-type{border-top:0}.s13-vault-sec article b{font-size:13px}.s13-vault-sec article p{margin:3px 0 0;font-size:13px;line-height:1.55;color:#475467}
.s13-form{display:grid;gap:12px}.s13-form label{font-size:12px;font-weight:800;color:#344054}.s13-form input,.s13-form select,.s13-form textarea{display:block;width:100%;margin-top:5px;border:1px solid #cfd7e4;border-radius:12px;padding:11px;font:inherit;background:#fff}.s13-form textarea{min-height:130px;resize:vertical}.s13-success{padding:10px;border-radius:10px;background:#effaf3;color:#176b36}.s13-error{padding:10px;border-radius:10px;background:#fff1f1;color:#b42318}
/* Mobile clarity: answer targets and visual reasoning images */
.sanai3 .s3-option,.sanai3 .s4-option,.sanai3 .option{min-height:52px;touch-action:manipulation}.sanai3 img.s3-question-image,.sanai3 img.s4-question-image,.sanai3 .question-card img,.sanai3 .s3-question img{display:block;max-width:min(100%,560px);height:auto;max-height:390px;object-fit:contain;margin:12px auto;border-radius:12px;background:#fff;touch-action:pinch-zoom}.sanai3 .s4-option img,.sanai3 .s3-option img{display:block;max-width:180px;max-height:150px;object-fit:contain;margin:8px auto;background:#fff}
.s13-home{border-color:#a9c5ff!important;background:#f4f8ff!important}
@media(max-width:620px){.s13-overlay{padding:0;align-items:flex-end}.s13-sheet{max-height:94vh;border-radius:24px 24px 0 0}.s13-grid{grid-template-columns:1fr}.s13-card{min-height:82px}.s13-sheet>header{grid-template-columns:44px 1fr 38px}.s13-sheet>header img{width:44px;height:44px}.sanai3 img.s3-question-image,.sanai3 img.s4-question-image,.sanai3 .question-card img{max-height:320px}}
@media(prefers-reduced-motion:reduce){.s13-overlay *{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
.s4-batch-pack{margin:14px 0;padding:12px;border:1px solid #dfe5ef;border-radius:16px;background:#fbfcfe}.s4-batch-pack>h3{font-size:14px;margin:12px 0 8px}.s4-join-more{margin-top:14px;border:1px dashed #b8c6dc;border-radius:14px;padding:10px}.s4-join-more summary{cursor:pointer;color:#155eef;font-weight:900;padding:5px}.s4-join-more .s4-form{margin-top:10px}