.khc-sm{max-width:1100px;margin:24px auto;padding:0 16px;font-family:Arial,sans-serif;color:#17202a;line-height:1.65}.khc-sm *{box-sizing:border-box}.khc-hero{background:linear-gradient(135deg,#17365d,#24578f);color:#fff;border-radius:18px;padding:28px;display:flex;justify-content:space-between;gap:24px;align-items:center}.khc-eyebrow{font-size:12px;letter-spacing:1.4px;opacity:.85;font-weight:700}.khc-hero h1,.khc-lesson-head h1{margin:5px 0 8px;font-size:32px;line-height:1.2}.khc-hero p{margin:0;max-width:700px;opacity:.94}.khc-progress-card{min-width:180px;background:#ffffff18;border:1px solid #ffffff30;padding:16px;border-radius:14px}.khc-progress-card strong{display:block;font-size:26px}.khc-progress-card span{font-size:13px;opacity:.85}.khc-progress{height:7px;background:#ffffff35;border-radius:10px;margin-top:12px;overflow:hidden}.khc-progress i{display:block;height:100%;background:#fff;border-radius:10px}.khc-note,.khc-source-note{margin:18px 0;padding:15px 18px;border-radius:12px;background:#f4f7fa;border-left:4px solid #17365d;font-size:14px}.khc-search-wrap{margin:20px 0}.khc-search-wrap input{width:100%;padding:14px 16px;border:1px solid #ccd5dd;border-radius:11px;font-size:16px}.khc-section{margin:28px 0}.khc-section-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.khc-section-title h2{margin:0;font-size:23px}.khc-section-title span{font-size:13px;color:#64727f}.khc-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.khc-lesson-card{display:block;text-decoration:none;color:inherit;background:#fff;border:1px solid #e0e6eb;border-radius:14px;padding:18px;box-shadow:0 2px 10px #00000008;transition:.18s}.khc-lesson-card:hover{transform:translateY(-2px);box-shadow:0 7px 22px #00000012;border-color:#aebdca}.khc-card-top{display:flex;justify-content:space-between;gap:8px;align-items:center}.khc-tag{display:inline-block;background:#e8f0f8;color:#17365d;border-radius:999px;padding:4px 9px;font-size:11px;font-weight:700;text-transform:uppercase}.khc-done{font-size:11px;color:#19734a;font-weight:700}.khc-lesson-card h3{margin:12px 0 6px;font-size:19px}.khc-lesson-card p{margin:0 0 14px;color:#5c6873;font-size:14px}.khc-read{font-weight:700;color:#17365d;font-size:14px}.khc-empty{text-align:center;padding:35px;background:#f7f9fb;border-radius:12px;color:#65727e}.khc-back{display:inline-block;margin-bottom:15px;text-decoration:none;font-weight:700;color:#17365d}.khc-lesson-head{background:#f4f7fa;border-radius:16px;padding:24px;border-left:5px solid #17365d}.khc-lesson-head p{margin:10px 0 0;color:#53616d}.khc-lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:22px;margin-top:20px}.khc-content-block{background:#fff;border:1px solid #e1e6ea;border-radius:14px;padding:22px;margin-bottom:16px}.khc-content-block h2{font-size:21px;margin:0 0 12px}.khc-content-block p{margin:0 0 10px}.khc-content-block ul,.khc-side-card ul{padding-left:22px}.khc-content-block li,.khc-side-card li{margin:7px 0}.khc-table-wrap{overflow:auto;margin:12px 0}.khc-table-wrap table{width:100%;border-collapse:collapse;min-width:500px}.khc-table-wrap th,.khc-table-wrap td{border:1px solid #dfe5ea;padding:10px;text-align:left;vertical-align:top}.khc-table-wrap th{background:#f4f7fa}.khc-examples{display:grid;gap:10px}.khc-example{padding:13px 15px;border-radius:10px;background:#f8fafc;border-left:4px solid #6d849a}.khc-example strong{display:block;margin-bottom:5px}.khc-example small{display:block;color:#5f6d79;margin-top:7px}.khc-side-card{background:#fff;border:1px solid #e1e6ea;border-radius:14px;padding:18px;margin-bottom:14px}.khc-side-card strong{font-size:17px}.khc-complete,.khc-mock-btn{display:block;width:100%;border:0;border-radius:10px;padding:13px 14px;text-align:center;font-weight:700;text-decoration:none;cursor:pointer;margin-bottom:10px}.khc-complete{background:#17365d;color:#fff}.khc-complete.is-done{background:#e7f4ed;color:#17653f}.khc-mock-btn{background:#eef3f8;color:#17365d}.khc-source-note{margin-top:20px}@media(max-width:850px){.khc-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.khc-lesson-layout{grid-template-columns:1fr}.khc-hero{flex-direction:column;align-items:stretch}}@media(max-width:560px){.khc-grid{grid-template-columns:1fr}.khc-hero h1,.khc-lesson-head h1{font-size:27px}.khc-content-block{padding:17px}}