/* ---- Compare Selection ---- */

.compare-checkbox {
    flex-shrink: 0;
    display: grid;
    place-items: center;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.compare-checkbox input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.compare-checkmark {
    width: 16px;
    height: 16px;
    border: 1.5px solid var(--border);
    border-radius: 4px;
    background: var(--surface);
    transition: border-color 0.15s, background 0.15s;
    display: grid;
    place-items: center;
}

.compare-checkbox:hover .compare-checkmark {
    border-color: var(--muted);
}

.compare-checkbox input:checked + .compare-checkmark {
    background: var(--accent);
    border-color: var(--accent);
}

.compare-checkbox input:checked + .compare-checkmark::after {
    content: "";
    width: 4px;
    height: 8px;
    border: solid var(--accent-fg);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) translate(-0.5px, -0.5px);
}

.compare-checkbox input:disabled + .compare-checkmark {
    opacity: 0.35;
    cursor: not-allowed;
}

.btn-compare {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.375rem 0.875rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--accent-fg);
    background: var(--accent);
    border: none;
    border-radius: var(--radius);
    text-decoration: none;
    white-space: nowrap;
    transition: opacity 0.15s;
}

.btn-compare:hover {
    opacity: 0.85;
}

.portfolio-card:has(.compare-check:checked) {
    box-shadow: 0 0 0 2px var(--accent);
}

.portfolio-no-matches {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--muted);
    font-size: 0.875rem;
}

.portfolio-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 4rem 1rem;
    text-align: center;
}

.portfolio-empty-icon {
    color: var(--muted);
    opacity: 0.5;
}

.portfolio-empty h2 {
    font-size: 1.125rem;
    font-weight: 600;
}

.portfolio-empty p {
    color: var(--muted);
    font-size: 0.875rem;
    max-width: 36ch;
}

.portfolio-compare-hint {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    margin-bottom: 1rem;
    font-size: 0.8125rem;
    color: var(--muted);
    background: var(--surface);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
}

.portfolio-compare-hint svg {
    flex-shrink: 0;
    opacity: 0.6;
}