:root { --bg: #f7f5f0; --ink: #1c2430; --muted: #5b6676; --line: #e2dccf; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: 'Be Vietnam Pro', system-ui, sans-serif; }
a { color: inherit; text-decoration: none; }

.top { height: 64px; display: flex; align-items: center; justify-content: space-between; padding: 0 24px; background: #fff; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; }
.logo { color: #e8731a; font-size: 28px; }
.who { font-size: 14px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; }

main { max-width: 1080px; margin: 0 auto; padding: 40px 24px 60px; }
h1 { font-size: 32px; margin: 0 0 6px; display: flex; align-items: center; gap: 12px; }
.sub { color: var(--muted); font-size: 17px; margin: 0 0 28px; }
.back { display: inline-block; color: var(--muted); font-size: 15px; margin-bottom: 14px; }
.back:hover { color: var(--ink); }

.subjects { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 18px; }
.subject { position: relative; display: flex; flex-direction: column; gap: 6px; background: #fff; border: 1px solid var(--line); border-radius: 16px;
  padding: 22px 22px 20px; border-top: 6px solid var(--c); transition: transform .15s, box-shadow .15s; min-height: 200px; }
.subject:not(.soon):hover { transform: translateY(-3px); box-shadow: 0 10px 28px rgba(0,0,0,.08); }
.subject .icon { font-size: 40px; }
.subject .name { font-size: 24px; font-weight: 700; }
.subject .name b { color: var(--c); }
.subject .meta { font-size: 14px; font-weight: 600; color: var(--c); }
.subject .desc { font-size: 14px; color: var(--muted); line-height: 1.45; }
.subject.soon { opacity: .55; cursor: default; }
.subject.soon .meta { color: var(--muted); }

.lessons { display: grid; gap: 14px; margin-top: 24px; }
.lesson { display: grid; grid-template-columns: 110px 1fr auto; grid-template-rows: auto auto; column-gap: 18px; row-gap: 4px; align-items: center;
  background: #fff; border: 1px solid var(--line); border-left: 6px solid var(--c); border-radius: 14px; padding: 18px 22px; transition: box-shadow .15s; }
.lesson:hover { box-shadow: 0 8px 24px rgba(0,0,0,.08); }
.lesson .num { grid-row: span 2; font-size: 22px; font-weight: 700; color: var(--c); }
.lesson .title { font-size: 18px; font-weight: 600; }
.lesson .desc { font-size: 14px; color: var(--muted); grid-column: 2; }
.lesson .go { grid-row: 1 / span 2; grid-column: 3; font-weight: 600; color: var(--c); white-space: nowrap; }

@media (max-width: 640px) {
  .lesson { grid-template-columns: 1fr; }
  .lesson .num, .lesson .go { grid-row: auto; grid-column: auto; }
  .lesson .desc { grid-column: auto; }
}