/* Biemann EduHub — course player (Maths programme and Data Science Academy) */
.course-sec{background:var(--ivory);padding:clamp(48px,6vw,96px) 0;border-bottom:1px solid var(--line)}
.course-head{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(300px,1fr);gap:clamp(24px,4vw,56px);align-items:end;margin-bottom:28px}
@media (max-width:900px){.course-head{grid-template-columns:minmax(0,1fr)}}
.course-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px;display:grid;gap:14px;box-shadow:var(--sh-1)}
.c-ring{width:84px;height:84px;--c:var(--blue)}
.c-ring::before{content:"";position:absolute;inset:8px;border-radius:50%;background:var(--paper)}
.c-ring b{font-size:1.3rem}
.c-dates{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.c-dates .field{display:grid;gap:4px}
.course-grid{display:grid;grid-template-columns:330px minmax(0,1fr);gap:22px;align-items:start}
@media (max-width:1000px){.course-grid{grid-template-columns:minmax(0,1fr)}}
.c-syll{display:grid;gap:10px;position:sticky;top:calc(var(--head-h,80px) + 12px);max-height:calc(100vh - var(--head-h,80px) - 24px);overflow:auto;padding-right:4px}
@media (max-width:1000px){.c-syll{position:static;max-height:none}}
.cs-phase{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden}
.cs-phase summary{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;padding:14px 16px;cursor:pointer;list-style:none}
.cs-phase summary::-webkit-details-marker{display:none}
.cs-phase summary>.icon{width:34px;height:34px;padding:8px;border-radius:10px;background:var(--navy);color:var(--cyan)}
.cs-phase summary b{display:block;font:600 .9rem var(--f-ui);color:var(--navy)}
.cs-phase summary small{display:block;font-size:.76rem;color:var(--ink-3)}
.cs-phase summary em{font:700 .74rem var(--f-ui);font-style:normal;color:var(--blue-ink)}
.cs-phase ol{list-style:none;margin:0;padding:0 8px 8px}
.cs-phase li button{display:grid;grid-template-columns:28px 1fr;gap:10px;width:100%;text-align:left;border:0;background:none;padding:9px 8px;border-radius:10px;font:500 .86rem var(--f-ui);color:var(--ink);cursor:pointer}
.cs-phase li button:hover{background:var(--ivory)}
.cs-phase li button.cur{background:var(--sky)}
.cs-phase li .dotc{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;border:1.5px solid var(--line);font:700 .68rem var(--f-ui);color:var(--ink-3)}
.cs-phase li button.done .dotc{background:var(--ok);border-color:var(--ok);color:#fff}
.cs-phase li button.done .dotc .icon{width:14px;height:14px}
.cs-phase li button.cur .dotc{border-color:var(--blue);color:var(--blue-ink)}
.cs-phase li .tl small{display:block;font-size:.72rem;color:var(--ink-3);margin-top:2px}
.c-lesson{padding:clamp(20px,2.4vw,32px)}
.c-lesson h3{font-size:clamp(1.5rem,1.2rem + 1vw,2.1rem);margin-top:10px}
.c-tabs{display:flex;gap:6px;flex-wrap:wrap;margin:20px 0 6px;border-bottom:1px solid var(--line);padding-bottom:12px}
.c-tabs button{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--paper);border-radius:999px;padding:8px 14px;font:600 .82rem var(--f-ui);color:var(--ink-2);cursor:pointer}
.c-tabs button .n{width:20px;height:20px;border-radius:50%;display:grid;place-items:center;background:var(--ivory-2);font-size:.66rem}
.c-tabs button .icon{width:15px;height:15px}
.c-tabs button .okc{color:var(--ok)}
.c-tabs button.is-on{background:var(--navy);border-color:var(--navy);color:#fff}
.c-tabs button.is-on .n{background:var(--cyan);color:var(--navy)}
.c-body{padding-top:14px;font-size:1.02rem;line-height:1.7;color:var(--ink-2)}
.c-body p{margin:0 0 14px}
.c-body b{color:var(--ink)}
.c-keys{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:18px 0;padding:14px;border-radius:var(--r);background:var(--navy);color:#fff}
.c-keys b{color:var(--cyan);font:700 .7rem var(--f-ui);letter-spacing:.14em;text-transform:uppercase;margin-right:6px}
.c-keys span{padding:6px 12px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(63,216,247,.3);font:600 .88rem "JetBrains Mono",ui-monospace,monospace}
.c-weight{display:flex;gap:10px;align-items:flex-start;font-size:.92rem;padding:12px 14px;border-left:3px solid var(--pink);background:var(--paper);border-radius:0 var(--r) var(--r) 0}
.c-weight .icon{color:var(--pink);margin-top:4px;flex:none}
.c-tasks{list-style:none;margin:14px 0 0;padding:0;display:grid;gap:8px}
.c-tasks li{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border:1px solid var(--line);border-radius:var(--r);background:var(--paper)}
.c-tasks li .icon{color:var(--blue-ink);margin-top:4px;flex:none}
.c-tasks li.ok{border-color:rgba(14,138,95,.4);background:var(--ok-bg)}
.c-tasks li.ok .icon{color:var(--ok)}
.c-tasks code,.c-body code{font:600 .88em "JetBrains Mono",monospace;background:var(--ivory-2);padding:1px 6px;border-radius:6px;color:var(--navy)}
.c-preset{font:600 .86rem "JetBrains Mono",monospace;background:var(--navy);color:var(--cyan);padding:8px 12px;border-radius:10px}
.c-q{border:1.5px solid var(--navy);border-radius:var(--r-lg);padding:18px;background:var(--paper)}
.c-q p{margin:10px 0 0;font-size:1.05rem;color:var(--ink)}
.c-memo{list-style:none;margin:14px 0;padding:0;display:grid;gap:8px;counter-reset:m}
.c-memo li{display:flex;justify-content:space-between;gap:14px;padding:10px 14px;border-radius:10px;background:var(--sky);animation:stepIn .3s var(--ease);font-family:"JetBrains Mono",ui-monospace,monospace;font-size:.92rem;color:var(--navy)}
.c-memo li em{font-style:normal;color:var(--ok);font-weight:800;white-space:nowrap}
.callout--ok{background:var(--ok-bg);color:#0B4D36}.callout--ok .icon{color:var(--ok)}
.c-mcq{padding:16px 0;border-bottom:1px solid var(--line)}
.c-mcq p{margin:0 0 10px;color:var(--ink)}
.c-mcq .opts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
@media (max-width:560px){.c-mcq .opts{grid-template-columns:minmax(0,1fr)}}
.c-mcq .opts button{text-align:left;border:1.5px solid var(--line);background:var(--paper);border-radius:10px;padding:10px 12px;font:500 .95rem var(--f-body,inherit);color:var(--ink);cursor:pointer}
.c-mcq .opts button:hover:not(:disabled){border-color:var(--blue)}
.c-mcq .opts button.right{border-color:var(--ok);background:var(--ok-bg)}
.c-mcq .opts button.wrong{border-color:var(--bad);background:var(--bad-bg)}
.c-mcq .why{margin:10px 0 0;font-size:.9rem;display:flex;gap:8px;align-items:flex-start}
.c-mcq .why .icon{flex:none;margin-top:4px;color:var(--blue-ink)}
.c-next{margin-top:18px;display:flex;justify-content:flex-end}
.c-nav{margin-top:22px;padding-top:16px;border-top:1px solid var(--line)}
@keyframes stepIn{from{opacity:0;transform:translateY(6px)}}
/* The lesson-library study dock only shows while the learner is in the library below the programme */
.mlab .dock{transition:transform .3s var(--ease),opacity .3s}
body:not(.in-library) .mlab .dock{transform:translateY(120%);opacity:0;pointer-events:none}