:root { --ink: #18322b; --muted: #6e7d78; --green: #1e6b52; --mint: #e7f3ee; --line: #dce7e2; --gold: #d99a2b; }
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: linear-gradient(135deg, #f4f8f6 0%, #eef5f1 55%, #fffaf0 100%); font-family: "Segoe UI", sans-serif; }
.display-shell { max-width: 1440px; margin: auto; padding: 36px 5vw 60px; }
.display-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; margin-bottom: 28px; }
.eyebrow { color: var(--gold); font-size: 12px; font-weight: 800; letter-spacing: 2px; margin: 0 0 8px; }
h1 { color: var(--green); font-size: clamp(30px, 4vw, 52px); line-height: 1; margin: 0; }
.date-label { color: var(--muted); font-size: 16px; margin: 12px 0 0; }
.live-status { display: flex; align-items: center; gap: 8px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: 1px; }
.live-status strong { color: var(--ink); font-size: 20px; letter-spacing: 0; margin-left: 8px; font-variant-numeric: tabular-nums; }
.live-status small { color: var(--muted); font-weight: 400; letter-spacing: 0; margin-left: 8px; }
.live-dot { width: 10px; height: 10px; border-radius: 50%; background: #35a56f; box-shadow: 0 0 0 5px #d8f0e3; }
.filters { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; }
.filters label { color: var(--muted); font-size: 12px; font-weight: 700; margin-left: 8px; }
select, button { border: 1px solid var(--line); border-radius: 7px; background: #fff; color: var(--ink); font: inherit; padding: 10px 12px; }
button { background: var(--green); color: #fff; border-color: var(--green); cursor: pointer; font-weight: 700; margin-left: auto; }
.class-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.class-card { background: #fff; border: 1px solid var(--line); border-top: 5px solid var(--green); box-shadow: 0 14px 36px rgba(30, 107, 82, .1); min-height: 245px; }
.class-card-head { background: var(--mint); padding: 16px 18px 14px; border-bottom: 1px solid var(--line); }
.class-label { color: var(--gold); font-size: 11px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; }
.class-card h2 { color: var(--green); font-size: 28px; margin: 4px 0 0; }
.lesson { padding: 17px 18px 18px; }
.lesson-time { color: var(--muted); font-size: 13px; font-weight: 700; }
.lesson-time span { padding: 0 4px; }
.lesson-subject { color: var(--green); font-size: 22px; font-weight: 800; line-height: 1.2; margin: 8px 0 15px; }
.lesson-detail { display: flex; justify-content: space-between; gap: 12px; border-top: 1px solid #edf2ef; padding-top: 8px; margin-top: 8px; font-size: 13px; }
.lesson-detail span { color: var(--muted); }
.lesson-detail strong { text-align: right; }
.loading, .empty { padding: 70px 20px; text-align: center; background: rgba(255,255,255,.75); color: var(--muted); }
.empty strong, .empty span { display: block; }
.empty strong { color: var(--ink); font-size: 20px; margin-bottom: 8px; }
.error strong { color: #b33c2e; }
@media (max-width: 650px) { .display-shell { padding: 26px 16px 40px; } .display-head { display: block; } .live-status { margin-top: 20px; flex-wrap: wrap; } .filters { flex-wrap: wrap; } .filters label { margin-left: 0; } button { margin-left: 0; width: 100%; } }