/* Base button structure — variant colors live in brand.css */
.btn,
button.btn,
a.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    font-weight: var(--btn-font-weight, 600);
    font-size: 0.875rem;
    line-height: 1.25;
    padding: 0.45rem 0.9rem;
    border-radius: var(--btn-radius, 0.5rem);
    border-width: 1px;
    border-style: solid;
    text-decoration: none;
    white-space: nowrap;
    transition:
        background-color 0.15s ease,
        border-color 0.15s ease,
        color 0.15s ease,
        box-shadow 0.15s ease,
        transform 0.1s ease;
    box-shadow: var(--btn-shadow, 0 1px 3px rgba(15, 23, 42, 0.08));
}

.btn i,
button.btn i,
a.btn i,
.btn .bi,
button.btn .bi,
a.btn .bi {
    color: inherit;
    line-height: 1;
}

.btn:focus-visible {
    outline: 2px solid var(--brand-primary);
    outline-offset: 2px;
}

.btn:disabled,
.btn.disabled,
button.btn:disabled,
a.btn.disabled {
    opacity: 0.55;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
    pointer-events: none;
}

.btn-sm,
button.btn-sm,
a.btn-sm {
    font-size: 0.8125rem !important;
    padding: 0.35rem 0.75rem !important;
    border-radius: var(--btn-radius-sm, 0.375rem) !important;
}

.btn-lg,
button.btn-lg,
a.btn-lg {
    font-size: 1rem;
    padding: 0.55rem 1.25rem;
    border-radius: 0.625rem;
}

.btn-link {
    box-shadow: none;
    font-weight: 500;
}

.btn-link:hover,
.btn-link:focus-visible {
    box-shadow: none;
    transform: none;
}