:root{--bg:#fff;--fg:#212529;--card:#fff;--mut:#6c757d;--pri:#1678b8;--line:#dee2e6;--band:#f3f4f6;--ink:#2b2d31;--bs-primary:#1678b8;--bs-primary-rgb:22,120,184;--bs-link-color:#1678b8;--bs-link-color-rgb:22,120,184;--bs-link-hover-color:#115f93;--bs-link-hover-color-rgb:17,95,147;--bs-body-font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--bs-body-bg:#fff;--bs-body-color:#212529}.btn-primary{--bs-btn-bg:#1678b8;--bs-btn-border-color:#1678b8;--bs-btn-hover-bg:#115f93;--bs-btn-hover-border-color:#115f93;--bs-btn-active-bg:#0f5686;--bs-btn-active-border-color:#0f5686;--bs-btn-disabled-bg:#1678b8;--bs-btn-disabled-border-color:#1678b8}.btn-outline-primary{--bs-btn-color:#1678b8;--bs-btn-border-color:#1678b8;--bs-btn-hover-bg:#1678b8;--bs-btn-hover-border-color:#1678b8;--bs-btn-active-bg:#115f93;--bs-btn-active-border-color:#115f93}.text-primary{color:#1678b8!important}.bg-primary{background-color:#1678b8!important}.border-primary{border-color:#1678b8!important}.page-link{color:#1678b8}.active>.page-link,.page-link.active{background-color:#1678b8;border-color:#1678b8}body{background:var(--bg);color:var(--fg);overflow-x:clip}main{max-width:1320px;margin:0 auto;padding:16px 12px}.mut{color:var(--mut)}audio{width:100%}.pcard{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px}.track{margin:12px 0}.track b{display:block}.exercise{margin:16px 0}.exercise h4{margin:0 0 8px;color:var(--pri)}.items{padding-left:1.5em}.items li{margin:8px 0}.blank{width:9em;margin:0 4px}input:not(.form-control):not(.form-check-input):not([type=checkbox]):not([type=radio]),select:not(.form-select),textarea:not(.form-control){font:inherit;padding:6px 10px;border-radius:6px;border:1px solid #adb5bd;background:#fff;color:var(--fg)}button:not(.btn):not(.navbar-toggler):not(.nav-link):not(.accordion-button):not(.btn-close){font:inherit;padding:6px 14px;border-radius:6px;border:0;background:var(--pri);color:#fff;cursor:pointer}button:disabled{opacity:.5}.wide{width:100%;max-width:520px}.radio{margin-right:10px}.err{color:#dc2626}.box{border-left:4px solid var(--pri);background:#f3f4f6;padding:4px 16px;margin:12px 0;border-radius:6px}.fig{display:inline-block;margin:4px;padding:2px 8px;border:1px dashed #adb5bd;border-radius:6px;color:var(--mut);font-size:.9em}.pcard table,article table,table.admin,table.cart{border-collapse:collapse;max-width:100%}article table{display:block;overflow-x:auto}td,th{border:1px solid var(--line);padding:4px 8px}nav.toc ol{padding-left:1.2em}.locked{opacity:.6}.field{display:block;margin:12px 0}.field span{display:block;font-size:.9em;color:var(--mut)}.field input:not([type=checkbox]):not([type=radio]):not([type=file]){width:100%;max-width:380px;padding:10px}.okmsg{color:#15803d}.linkbtn{background:none!important;color:var(--pri)!important;padding:0!important;text-decoration:underline}form.stack{max-width:420px}.devices li{margin:8px 0}.btn2{display:inline-block;margin:4px 8px 4px 0}table.cart td{padding:6px 10px}.price{font-weight:700}.buy{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin:8px 0}table.admin{display:table;width:100%;font-size:.92em}table.admin td,table.admin th{vertical-align:top}.tag{display:inline-block;padding:1px 8px;border-radius:99px;background:#e9ecef;font-size:.85em}.tag.sale{background:#ffe08a;color:#533f03}.prev{font-weight:400;color:var(--mut);font-size:.85em}.lessonprog{background:#f3f4f6;padding:6px 12px;border-radius:8px}.hrow{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.hrow.between{justify-content:space-between}.pager{justify-content:center;margin:24px 0}.adminnav,.pager{display:flex;gap:16px}.adminnav{flex-wrap:wrap;padding:8px 16px;background:#f3f4f6;border-bottom:1px solid var(--line);font-weight:600}.adminnav a{text-decoration:none}form.wideform{max-width:640px}form.wideform .field input:not([type=checkbox]):not([type=file]),form.wideform .field select{width:100%;max-width:none}.field input[type=checkbox],.field input[type=radio]{width:auto;display:inline-block;margin-right:6px}fieldset.field{border:1px solid var(--line);border-radius:8px;padding:8px 12px}fieldset.field label{display:block}.desc{max-width:52em}.toc ol{margin:0}.crumbs{font-size:.9em;color:var(--mut);margin:4px 0 12px}.crumbs a{color:inherit}.fullbleed{width:100vw;margin-left:calc(50% - 50vw)}.band-grey{background:var(--band)}.band-ink{background:var(--ink);color:#fff}.band-blue{background:var(--bs-primary);color:#fff}.sec-title{font-size:1.25rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;text-align:center;margin:0 0 .5rem}.sec-title .accent{color:var(--bs-primary)}.sec-sub{text-align:center;color:var(--mut);max-width:46em;margin:0 auto 1.5rem}.nocover{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:6px;width:100%;height:100%;padding:12px;text-align:center;background:linear-gradient(160deg,#41566b,#1f2d3b);color:#fff}.nocover span{font-size:1.2rem;font-weight:700}.bk{transition:box-shadow .15s}.bk:hover{box-shadow:0 .5rem 1rem rgba(0,0,0,.12)}.bk .cover{display:block;background:#eef0f2}.bk .cover img{width:100%;height:100%;object-fit:cover;display:block}.bk .ttl{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;color:inherit;text-decoration:none;font-weight:600;line-height:1.3;min-height:2.6em}.bk .ttl:hover{color:var(--bs-primary)}.bk .au{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.bk .off{position:absolute;top:8px;right:8px}.mini{display:flex;gap:12px;padding:.6rem 0;border-bottom:1px solid var(--line)}.mini:last-child{border-bottom:0}.mini .thumb{flex:0 0 58px;aspect-ratio:2/3;border-radius:4px;overflow:hidden;background:#eef0f2}.mini .thumb img{width:100%;height:100%;object-fit:cover}.stat b{display:block;font-size:2.4rem;font-weight:700;line-height:1.1}.site-footer{background:var(--ink);color:#b9bcc3;font-size:.92rem}.site-footer a{color:#b9bcc3;text-decoration:none}.site-footer a:hover{color:#fff;text-decoration:underline}.site-footer h6{color:#fff;text-transform:uppercase;letter-spacing:.05em;font-size:.85rem}.hero-banner img{width:100%;max-height:340px;object-fit:cover}.navbar-brand{font-weight:800;letter-spacing:.01em}.catbar .nav-link{color:#343a40;font-weight:500;padding:.6rem .9rem}.catbar .nav-link:hover{color:var(--bs-primary)}.dropdown-menu .dropdown-header{font-weight:700;color:#212529}.format-card{border:1px solid var(--line);border-radius:.5rem;padding:1rem}dl.details{margin:0}dl.details div{display:grid;grid-template-columns:180px 1fr;grid-gap:12px;gap:12px;padding:6px 0;border-bottom:1px solid var(--line)}dl.details dt{color:var(--mut);font-weight:400}dl.details dd{margin:0}main article{max-width:54rem;margin:0 auto}fieldset.field legend{font-size:1rem;font-weight:600;float:none;width:auto;padding:0 6px;margin-bottom:.4rem}