.learn { padding: 36px 0 80px; min-height: 70vh; }
.learn h1 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); }
.learn h2 { font-size: 1.5rem; margin-top: 2rem; }
.l-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 18px; }
.l-card { background: var(--c-surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; text-decoration: none; color: inherit; display: flex; flex-direction: column; gap: 6px; }
a.l-card:hover { box-shadow: var(--shadow); }
.l-card h3 { margin: 0; font-size: 1.2rem; }
.l-cover { aspect-ratio: 16/9; border-radius: calc(var(--radius) - 6px); background: linear-gradient(135deg, var(--c-primary), var(--c-accent)) center/cover; margin: -6px -6px 8px; }
.l-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.l-input { padding: .7em .9em; border: 1px solid var(--line); border-radius: 10px; font: inherit; background: #fff; color: #222; }
.l-input.grow { flex: 1; min-width: 200px; }
textarea.l-input { width: 100%; min-height: 120px; }
.l-layout { display: grid; grid-template-columns: 1fr 320px; gap: 32px; align-items: start; }
@media (max-width: 900px) { .l-layout { grid-template-columns: 1fr; } }
.l-side { position: sticky; top: 96px; display: flex; flex-direction: column; gap: 14px; }
.l-box { background: var(--c-surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.l-week { background: var(--c-surface); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 14px; overflow: hidden; }
.l-week > summary { padding: 16px 20px; cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 10px; }
.l-week > summary::-webkit-details-marker { display: none; }
.l-items { border-top: 1px solid var(--line); }
.l-item { padding: 16px 20px; border-bottom: 1px solid var(--line); }
.l-item:last-child { border-bottom: 0; }
.l-item-head { display: flex; gap: 10px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.l-item-head h4 { margin: 0; font: 600 1.02rem/1.4 var(--font-body); }
.k-ico { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 9px; background: color-mix(in srgb, var(--c-primary) 10%, transparent); font-size: 14px; flex: none; }
.l-item .prose { margin-top: 10px; font-size: .98rem; }
.l-item .video-frame { margin-top: 12px; }
.lock { color: var(--c-muted); font-size: .85rem; }
.sub-box { margin-top: 12px; padding: 14px; border-radius: 12px; background: var(--soft); }
.qr-box { text-align: center; }
.qr-box img { width: 240px; max-width: 100%; margin: 10px auto; border-radius: 12px; border: 1px solid var(--line); background: #fff; }
.copy { display: flex; justify-content: space-between; gap: 8px; padding: 8px 10px; border: 1px dashed var(--line); border-radius: 10px; margin: 6px 0; font-size: .9rem; }
.copy b { font-family: ui-monospace, monospace; }
.post { background: var(--c-surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; margin-bottom: 12px; }
.post .meta { font-size: .82rem; color: var(--c-muted); margin-bottom: 6px; }
.m-table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.m-table td, .m-table th { padding: 9px 8px; border-bottom: 1px solid var(--line); text-align: left; }
.toasts { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; gap: 8px; z-index: 200; }
.toast { background: #1d1b18; color: #fff; padding: 10px 16px; border-radius: 10px; font-size: .9rem; }
.toast.err { background: #9a3412; }
.big-empty { text-align: center; padding: 60px 20px; border: 2px dashed var(--line); border-radius: var(--radius); color: var(--c-muted); }