.classroom-page {
    background:
        radial-gradient(circle at 10% 4%, rgba(59, 130, 246, .13), transparent 28%),
        radial-gradient(circle at 88% 12%, rgba(168, 85, 247, .13), transparent 30%),
        radial-gradient(circle at 82% 86%, rgba(14, 165, 233, .13), transparent 34%),
        linear-gradient(135deg, #f8fbff 0%, #f5f3ff 42%, #ffffff 100%);
}

.classroom-hero {
    position: relative;
    overflow: hidden;
}

.classroom-kicker,
.classroom-section-kicker {
    color: #2563eb;
    font-size: .82rem;
    font-weight: 900;
    letter-spacing: .08em;
}

.classroom-kicker {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .55rem 1rem;
    border-radius: 999px;
    background: rgba(37, 99, 235, .08);
    border: 1px solid rgba(37, 99, 235, .12);
}

.classroom-hero-title {
    font-size: clamp(2.3rem, 5vw, 4.8rem);
    line-height: 1.08;
    letter-spacing: -.055em;
}

.classroom-hero-text {
    max-width: 760px;
    color: #5b6472;
    font-size: 1.05rem;
    line-height: 2;
}

.classroom-hero-card,
.classroom-room-card,
.classroom-form-card,
.classroom-note-card,
.classroom-result-card {
    border: 1px solid rgba(15, 23, 42, .08);
    background: rgba(255, 255, 255, .84);
    box-shadow: 0 24px 60px rgba(15, 23, 42, .09);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.classroom-hero-card {
    padding: 2rem;
    border-radius: 2rem;
}

.classroom-live-badge {
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    padding: .55rem .9rem;
    color: #047857;
    background: rgba(209, 250, 229, .86);
    border: 1px solid rgba(16, 185, 129, .25);
    border-radius: 999px;
    font-size: .8rem;
    font-weight: 900;
}

.classroom-live-badge span {
    width: 9px;
    height: 9px;
    border-radius: 999px;
    background: #10b981;
    box-shadow: 0 0 0 6px rgba(16, 185, 129, .13);
}

.classroom-status-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: .8rem;
}

.classroom-status-grid div {
    padding: 1rem .65rem;
    border-radius: 1.2rem;
    text-align: center;
    background: #f8fafc;
    border: 1px solid rgba(15, 23, 42, .06);
}

.classroom-status-grid strong,
.classroom-status-grid span {
    display: block;
}

.classroom-status-grid strong {
    color: #2563eb;
    font-weight: 900;
}

.classroom-status-grid span {
    margin-top: .25rem;
    color: #64748b;
    font-size: .75rem;
    font-weight: 700;
}

.classroom-section-title {
    font-size: clamp(1.9rem, 3vw, 3rem);
    letter-spacing: -.045em;
    line-height: 1.25;
}

.classroom-room-card {
    padding: 1.35rem;
    border-radius: 1.5rem;
    transition: transform .25s ease, box-shadow .25s ease;
}

.classroom-room-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 28px 70px rgba(15, 23, 42, .13);
}

.classroom-room-card__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.2rem;
}

.classroom-room-card__top span {
    display: inline-flex;
    padding: .42rem .75rem;
    border-radius: 999px;
    color: #2563eb;
    background: rgba(37, 99, 235, .08);
    border: 1px solid rgba(37, 99, 235, .12);
    font-size: .72rem;
    font-weight: 900;
}

.classroom-room-card__top i {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 1rem;
    color: #fff;
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    box-shadow: 0 14px 28px rgba(37, 99, 235, .22);
}

.classroom-room-meta {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: .75rem;
}

.classroom-room-meta div {
    padding: .75rem;
    border-radius: 1rem;
    background: #f8fafc;
    border: 1px solid rgba(15, 23, 42, .06);
}

.classroom-room-meta span,
.classroom-room-meta strong {
    display: block;
}

.classroom-room-meta span {
    color: #64748b;
    font-size: .72rem;
    font-weight: 800;
}

.classroom-room-meta strong {
    margin-top: .25rem;
    color: #111827;
    font-size: .86rem;
}

.classroom-feature-list {
    list-style: none;
    padding: 0;
}

.classroom-feature-list li {
    display: flex;
    gap: .55rem;
    align-items: flex-start;
    color: #475569;
    font-size: .88rem;
    margin-bottom: .55rem;
}

.classroom-feature-list li:last-child {
    margin-bottom: 0;
}

.classroom-feature-list i {
    color: #2563eb;
    margin-top: .12rem;
}

.classroom-create-section {
    background:
        radial-gradient(circle at 12% 20%, rgba(251, 146, 60, .13), transparent 30%),
        radial-gradient(circle at 88% 12%, rgba(99, 102, 241, .13), transparent 30%),
        linear-gradient(135deg, #ffffff 0%, #f8fafc 55%, #eef6ff 100%);
}

.classroom-form-card,
.classroom-note-card,
.classroom-result-card {
    border-radius: 1.5rem;
    padding: 1.5rem;
}

.classroom-result-card {
    background: linear-gradient(135deg, #f8fbff 0%, #eef6ff 100%);
}

@media (max-width: 575.98px) {
    .classroom-status-grid,
    .classroom-room-meta {
        grid-template-columns: 1fr;
    }

    .classroom-hero-card,
    .classroom-form-card,
    .classroom-note-card,
    .classroom-result-card {
        padding: 1.25rem;
        border-radius: 1.35rem;
    }
}