.top-subtitle {
    margin: 0.2rem 0 0;
    color: #64748b;
    font-size: 0.9rem;
}

.grades-shell {
    padding: 1.25rem;
    display: grid;
    gap: 1.25rem;
}

.grades-hero {
    padding: 1.4rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: start;
    gap: 1rem;
    background:
        radial-gradient(circle at top right, rgba(37, 99, 235, 0.16), transparent 28%),
        linear-gradient(135deg, rgba(255,255,255,0.96), rgba(239,246,255,0.94));
}

.hero-kicker {
    margin: 0 0 0.35rem;
    font-size: 0.74rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    font-weight: 800;
    color: #2563eb;
}

.grades-hero h1 {
    margin: 0;
    font-size: 1.7rem;
    color: #0f172a;
}

.grades-hero p {
    margin: 0.55rem 0 0;
    color: #475569;
    line-height: 1.6;
    max-width: 760px;
}

.hero-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.6rem 0.9rem;
    border-radius: 999px;
    background: rgba(255,255,255,0.94);
    color: #1d4ed8;
    font-weight: 800;
    border: 1px solid rgba(37, 99, 235, 0.12);
}

.grades-workspace {
    display: grid;
    grid-template-columns: minmax(300px, 360px) minmax(0, 1fr);
    gap: 1.25rem;
    align-items: start;
}

.grades-panel,
.rules-card {
    padding: 1.2rem;
}

.grades-panel h3,
.card-head h3 {
    margin: 0 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.45rem;
    color: #334155;
}

.grade-range-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
}

.course-picker {
    display: grid;
    gap: 0.7rem;
}

.course-tools {
    display: flex;
    gap: 0.55rem;
    flex-wrap: wrap;
}

.course-checklist {
    max-height: 220px;
    overflow: auto;
    border: 1px solid rgba(148, 163, 184, 0.18);
    border-radius: 14px;
    padding: 0.55rem;
    background: #f8fbff;
    display: grid;
    gap: 0.45rem;
}

.course-option {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 0.65rem;
    border-radius: 12px;
    background: rgba(255,255,255,0.94);
    border: 1px solid rgba(148, 163, 184, 0.14);
    color: #0f172a;
    font-weight: 600;
}

.course-option span {
    color: #0f172a;
    opacity: 1;
}

.course-option input {
    accent-color: #2563eb;
    flex: 0 0 auto;
}

.panel-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
    margin-top: 0.4rem;
}

.grades-content {
    display: grid;
    gap: 1rem;
}

.summary-strip {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.summary-card {
    background: rgba(255,255,255,0.92);
    border: 1px solid rgba(148, 163, 184, 0.18);
    border-radius: 18px;
    padding: 1rem 1.1rem;
    box-shadow: 0 18px 48px rgba(15, 23, 42, 0.08);
    display: grid;
    gap: 0.25rem;
}

.summary-card span {
    font-size: 0.74rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #64748b;
    font-weight: 800;
}

.summary-card strong {
    color: #0f172a;
    font-size: 1.15rem;
}

.card-head p {
    margin: -0.45rem 0 0;
    color: #64748b;
}

.rules-table-wrap {
    overflow: auto;
}

.empty-cell {
    text-align: center;
    color: #64748b;
    padding: 1rem;
}

.rule-actions {
    display: flex;
    gap: 0.45rem;
    justify-content: center;
}

@media (max-width: 1000px) {
    .grades-workspace {
        grid-template-columns: 1fr;
    }

    .summary-strip {
        grid-template-columns: 1fr;
    }
}