.calendar-avail-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    width: 95%;
    max-width: 1040px;
    height: min(720px, 90vh);
    background: var(--color-card-bg);
    border-radius: 16px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    z-index: 1071;
    display: flex;
    flex-direction: column;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
    overflow: hidden;
}

.calendar-avail-modal.is-open {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.calendar-avail-mode-select {
    padding: var(--spacing-2xs) var(--spacing-xsm);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    background: var(--color-card-bg);
    color: #374151;
}

.calendar-avail-mode-select:focus {
    outline: none;
    border-color: var(--color-focus-ring);
    box-shadow: 0 0 0 2px var(--color-focus-ring-alpha);
}

.calendar-avail-day-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 110px;
    flex-shrink: 0;
}

.calendar-avail-day-toggle input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--color-action);
    cursor: pointer;
}

@media (max-width: 900px) {
    .calendar-avail-modal {
        height: min(720px, 95vh);
    }

    .calendar-avail-preview-split {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .calendar-avail-modal {
        width: 100%;
        height: 100%;
        max-width: none;
        max-height: none;
        border-radius: 0;
        top: 0;
        left: 0;
        transform: translateY(100%);
    }

    .calendar-avail-modal.is-open {
        transform: translateY(0);
    }

    .calendar-avail-day-toggle {
        width: 90px;
    }
}

.calendar-avail-exc-radios {
    display: flex;
    gap: var(--spacing-md);
}

.calendar-avail-exc-radio {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    font-size: var(--font-size-md);
}