/* «Решение задач по фото»: on top of the text-check styles (.tc), same colors and cards. */
.sv .sv-types{font-size:14px;line-height:1.55;color:#2f6b93;font-weight:600;max-width:560px;margin:10px 0 14px}
.sv .sv-step{display:flex;align-items:center;gap:10px;font-weight:800;font-size:15px;margin:4px 0 12px}
.sv .sv-step b{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:50%;background:#1e88e5;color:#fff;font-size:13px;flex:none}
.sv .sv-step small{font-weight:400;color:var(--tc-muted);font-size:13px}
.sv .sv-step:not(:first-of-type){margin-top:22px}
.sv .sv-pick{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.sv .sv-btn{display:flex;align-items:center;justify-content:center;gap:10px;min-height:56px;padding:12px;border:2px dashed #9cc8ea;border-radius:16px;background:#f5fbff;color:#1565c0;font-weight:700;font-size:15px;cursor:pointer;text-align:center;transition:background .15s,border-color .15s}
.sv .sv-btn:hover,.sv .sv-btn:focus-within{background:#e8f4fd;border-color:#1e88e5}
.sv .sv-btn svg{width:26px;height:26px;flex:none}
.sv .sv-btn-cam{background:#1e88e5;border:2px solid #1e88e5;color:#fff}.sv .sv-btn-cam:hover,.sv .sv-btn-cam:focus-within{background:#1976d2;border-color:#1976d2}
.sv .sv-drop{margin-top:10px;padding:26px;border:2px dashed #1e88e5;border-radius:16px;text-align:center;background:#e8f4fd;font-weight:700;color:#1565c0}
.sv .sv-thumbs{list-style:none;padding:0;margin:12px 0 0;display:flex;flex-wrap:wrap;gap:10px}
.sv .sv-thumbs:empty{display:none}
.sv .sv-thumbs li{position:relative;width:84px;height:84px;border-radius:12px;overflow:hidden;border:1px solid var(--tc-border);background:#f3f6f9;display:grid;place-items:center;font-weight:800;color:#2f6b93}
.sv .sv-thumbs img{width:100%;height:100%;object-fit:cover}
.sv .sv-x{position:absolute;top:4px;right:4px;width:26px;height:26px;border-radius:50%;border:0;background:rgba(0,0,0,.6);color:#fff;font-size:17px;line-height:1;cursor:pointer}
.sv .sv-hint{font-size:12px;color:var(--tc-muted);margin:10px 0 0}
.sv .sv-reading{display:flex;align-items:center;gap:10px;margin-top:12px;padding:12px 14px;border-radius:12px;background:#fff8e6;font-size:14px;font-weight:600}
.sv .sv-spin{width:18px;height:18px;border:3px solid #ffd27a;border-top-color:#f0a000;border-radius:50%;animation:svspin .8s linear infinite;flex:none}
@keyframes svspin{to{transform:rotate(360deg)}}
.sv .sv-label{display:block;font-weight:700;font-size:13px;margin:18px 0 6px}.sv .sv-label small{font-weight:400;color:var(--tc-muted)}
.sv textarea{width:100%;border:1px solid var(--tc-border);border-radius:12px;padding:12px 14px;font:inherit;font-size:16px;line-height:1.5;background:#fff;color:var(--tc-ink);min-height:150px;resize:vertical;box-sizing:border-box}
.sv .sv-unclear{margin-top:8px;font-size:13px;background:#fff4e5;border-radius:10px;padding:8px 12px;color:#8a5300}.sv .sv-unclear p{margin:2px 0}
.sv .sv-preview-box{margin-top:10px;border:1px solid var(--tc-border);border-radius:12px;padding:8px 14px;background:#fbfdff}
.sv .sv-preview-box summary{cursor:pointer;font-size:13px;font-weight:700;color:#2f6b93}
.sv .sv-submit{width:100%;font-size:16px;padding:15px 22px}
.sv .sv-note{font-size:12px;color:var(--tc-muted);margin:10px 0 0}
.sv .sv-buy{margin-top:14px;border:1px solid #ffd27a;background:#fffaf0;border-radius:14px;padding:14px}
.sv .sv-buy-title{font-weight:700;margin:0 0 10px}
.sv .sv-packs{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.sv .sv-pack{display:grid;gap:2px;justify-items:center;padding:12px 8px;border:1px solid var(--tc-border);border-radius:14px;background:#fff;font:inherit;color:var(--tc-ink);text-align:center}
.sv button.sv-pack{cursor:pointer}.sv button.sv-pack:hover{border-color:#1e88e5;background:#f5fbff}
.sv .sv-pack strong{font-size:14px}.sv .sv-pack span{font-size:20px;font-weight:800;color:#1565c0}.sv .sv-pack small{font-size:11px;color:var(--tc-muted)}
.sv .sv-how{background:#f5fbff;border:1px solid var(--tc-border);border-radius:20px;padding:22px}
.sv .sv-how h2{font-size:18px;margin:0 0 10px}.sv .sv-how ol{padding-left:18px;margin:0;display:grid;gap:10px;font-size:13px;line-height:1.5}
.sv .sv-how h3{font-size:15px;margin:18px 0 6px}
.sv .sv-history{list-style:none;padding:0;margin:0;display:grid;gap:6px;font-size:13px}.sv .sv-history small{color:var(--tc-muted)}
.sv .sv-section{background:#fff;border:1px solid var(--tc-border);border-radius:22px;padding:26px;margin-top:24px}
.sv h2{font-size:22px;margin:0 0 10px}.sv .sv-sub{color:var(--tc-muted);font-size:14px;margin:0 0 16px}
.sv .sv-subjects{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.sv .sv-subjects div{border:1px solid var(--tc-border);border-radius:14px;padding:12px 14px}
.sv .sv-subjects strong{display:block;font-size:14px;margin-bottom:4px}.sv .sv-subjects small{font-size:12px;color:var(--tc-muted);line-height:1.45;display:block}
.sv .sv-packs-static{max-width:560px}
.sv .sv-faq details{border-top:1px solid var(--tc-border);padding:12px 0}.sv .sv-faq summary{cursor:pointer;font-weight:700}
.sv .sv-faq p{font-size:14px;line-height:1.6;color:#33475b;margin:8px 0 0}
/* the solution */
.sv .sv-narrow{max-width:860px}
.sv .sv-title{font-size:28px;line-height:1.25;margin:0 0 4px;word-break:break-word}
.sv .sv-card,.sv .sv-step-card{background:#fff;border:1px solid var(--tc-border);border-radius:18px;padding:20px 22px;margin-top:16px}
.sv .sv-card h2,.sv .sv-steps>h2{font-size:17px;margin:0 0 8px;color:#2f6b93;text-transform:uppercase;letter-spacing:.3px}
.sv .sv-steps{margin-top:22px}
.sv .sv-step-card header{display:flex;gap:12px;align-items:flex-start;margin-bottom:6px}
.sv .sv-step-card header b{display:inline-grid;place-items:center;min-width:30px;height:30px;border-radius:50%;background:#1e88e5;color:#fff;font-size:14px;flex:none}
.sv .sv-step-card h3{font-size:16px;margin:4px 0 0;line-height:1.35}
.sv .sv-md{font-size:15.5px;line-height:1.65;color:#1f2d3d;overflow-wrap:anywhere}
.sv .sv-md p{margin:6px 0}.sv .sv-md ul,.sv .sv-md ol{margin:6px 0;padding-left:22px}
.sv .sv-math{overflow-x:auto;overflow-y:hidden;padding:4px 0;margin:6px 0;-webkit-overflow-scrolling:touch}
.sv .katex{font-size:1.08em}.sv .katex-display{margin:0}
.sv .sv-given{display:grid;grid-template-columns:1fr 1fr;gap:20px}.sv .sv-given ul{margin:0;padding-left:18px;line-height:1.8}
.sv .sv-idea{background:#f5fbff}
.sv .sv-answer{border:2px solid #1e88e5;background:#f5fbff}
.sv .sv-verdict{display:grid;gap:4px;margin-top:16px;padding:14px 18px;border-radius:16px;font-size:14px;line-height:1.5}
.sv .sv-verdict strong{font-size:16px}
.sv .sv-verdict-passed{background:#e9f8ef;border:1px solid #9ad8b0;color:#14532d}
.sv .sv-verdict-failed{background:#fdecec;border:1px solid #f2a7a7;color:#7f1d1d}
.sv .sv-verdict-unchecked,.sv .sv-verdict-not_numeric{background:#f3f6f9;border:1px solid var(--tc-border);color:#33475b}
.sv .sv-files{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}
.sv .sv-file{display:grid;gap:2px;padding:12px 16px;border:1px solid var(--tc-border);border-radius:14px;background:#fff;text-decoration:none;color:var(--tc-ink)}
.sv .sv-file strong{color:#1565c0}.sv .sv-file small{color:var(--tc-muted);font-size:12px}
.sv .sv-code{background:#0f1b2a;color:#e3edf7;border-radius:12px;padding:12px 14px;overflow:auto;font-size:13px;line-height:1.5;max-height:520px;white-space:pre}
.sv .sv-out{background:#f3f6f9;color:#1f2d3d}.sv .sv-out-err{background:#fdecec;color:#7f1d1d}
.sv .sv-table-wrap{overflow-x:auto;margin:10px 0}
.sv .sv-table{border-collapse:collapse;width:100%;font-size:14px}.sv .sv-table th,.sv .sv-table td{border:1px solid var(--tc-border);padding:6px 10px;text-align:left}
.sv .sv-table th{background:#f5fbff}
.sv .sv-details summary{cursor:pointer;font-size:13px;color:#2f6b93;font-weight:700;margin-top:8px}
.sv .sv-notes{background:#fffaf0}
.sv .sv-actions{margin-top:22px}
.sv .sv-bar{height:10px;border-radius:6px;background:#e3eef8;overflow:hidden}.sv .sv-bar span{display:block;height:100%;background:#1e88e5;transition:width .5s}
.sv .sv-stages{font-size:13px;color:var(--tc-muted);padding-left:18px}
@media (max-width: 760px){
  .sv .sv-pick{grid-template-columns:1fr}
  .sv .sv-step{flex-wrap:wrap}.sv .sv-step small{flex-basis:100%;padding-left:36px;margin-top:-6px}
  .sv .sv-btn{min-height:60px;font-size:16px}
  .sv .sv-card,.sv .sv-step-card{padding:16px;border-radius:16px}
  .sv .sv-given{grid-template-columns:1fr;gap:6px}
  .sv .sv-title{font-size:23px}
  .sv .sv-section{padding:18px}
  .sv .sv-packs{grid-template-columns:1fr 1fr 1fr;gap:6px}
  .sv .sv-md{font-size:15px}
  .sv .sv-files{grid-template-columns:1fr 1fr}
}