.sls-schedule-block {
    border: 1px solid #e2e2e2;
    border-radius: 8px;
    padding: 16px 20px;
    margin: 20px 0;
    background: #fafafa;
}
.sls-schedule-block h3 {
    margin-top: 0;
}
.sls-fixed-list, .sls-slot-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.sls-fixed-list li, .sls-slot {
    padding: 10px 0;
    border-bottom: 1px solid #ececec;
}
.sls-fixed-list li:last-child, .sls-slot:last-child {
    border-bottom: none;
}
.sls-note {
    color: #666;
    font-size: 0.85em;
}
.sls-book-btn {
    background: #1a237e;
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 6px 14px;
    cursor: pointer;
}
.sls-book-btn:disabled {
    opacity: 0.6;
    cursor: default;
}
.sls-instructor-dashboard {
    max-width: 800px;
    background: #fff;
    border: 1px solid #e2e2e2;
    border-radius: 10px;
    padding: 28px 32px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.sls-instructor-dashboard h2 {
    font-size: 1.3em;
    margin: 0 0 18px 0;
    padding-bottom: 10px;
    border-bottom: 2px solid #f0f0f0;
    color: #1a237e;
}
.sls-instructor-dashboard h2:not(:first-child) {
    margin-top: 32px;
}
.sls-instructor-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px 20px;
    max-width: 620px;
    margin-bottom: 12px;
    background: #fafbfc;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid #eee;
}
.sls-instructor-form label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-weight: 600;
    font-size: 0.92em;
    color: #333;
}
.sls-instructor-form select,
.sls-instructor-form input {
    font-weight: normal;
    padding: 9px 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 0.95em;
    background: #fff;
}
.sls-instructor-form select:focus,
.sls-instructor-form input:focus {
    outline: none;
    border-color: #1a237e;
    box-shadow: 0 0 0 2px rgba(26,35,126,0.12);
}
.sls-instructor-form button[type="submit"] {
    grid-column: 1 / -1;
    background: #1a237e;
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 11px 20px;
    font-size: 0.95em;
    font-weight: 600;
    cursor: pointer;
    width: fit-content;
}
.sls-instructor-form button[type="submit"]:hover {
    background: #141a5e;
}
.sls-instructor-form button[type="submit"]:disabled {
    opacity: 0.6;
    cursor: default;
}
.sls-sessions-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 8px;
}
.sls-sessions-table th {
    text-align: left;
    padding: 10px;
    background: #f5f6fa;
    font-size: 0.85em;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: #555;
}
.sls-sessions-table td {
    text-align: left;
    padding: 10px;
    border-bottom: 1px solid #ececec;
    font-size: 0.92em;
}
.sls-delete-btn {
    background: #c0392b;
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 4px 10px;
    cursor: pointer;
}
.sls-error { color: #c0392b; }
.sls-success { color: #1a7a1a; }