.mui-btn {
    --btn-bg: var(--bs-primary);
    --btn-color: #fff;
    --btn-border: var(--bs-primary);

    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    min-height: 38px;
    padding: 0.52rem 0.82rem;
    border: 1px solid var(--btn-border);
    border-radius: var(--ui-radius-sm, 6px);
    background: var(--btn-bg);
    color: var(--btn-color);
    font-size: 0.83rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: 0;
    text-decoration: none;
    box-shadow: none;
    overflow: hidden;
    transition: background-color 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.mui-btn:hover {
    color: var(--btn-color);
    filter: brightness(0.96);
    text-decoration: none;
}

.mui-btn:focus-visible {
    outline: none;
    box-shadow: var(--ui-focus, 0 0 0 3px rgba(var(--app-primary-rgb), 0.16));
}

.mui-btn.disabled,
.mui-btn:disabled,
.mui-btn[aria-disabled="true"] {
    opacity: 0.62;
    pointer-events: none;
}

.mui-btn__content {
    position: relative;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    min-width: 0;
}

.mui-btn__content span {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mui-btn__layer,
.mui-btn__layer::before,
.mui-btn__layer::after {
    display: none;
}

.mui-btn--primary {
    --btn-bg: var(--bs-primary);
    --btn-color: #fff;
    --btn-border: var(--bs-primary);
}

.mui-btn--secondary {
    --btn-bg: var(--bs-secondary);
    --btn-color: #fff;
    --btn-border: var(--bs-secondary);
}

.mui-btn--danger {
    --btn-bg: #dc3545;
    --btn-color: #fff;
    --btn-border: #dc3545;
}

.mui-btn--success {
    --btn-bg: #198754;
    --btn-color: #fff;
    --btn-border: #198754;
}

.mui-btn--warning {
    --btn-bg: #f59e0b;
    --btn-color: #111827;
    --btn-border: #f59e0b;
}

.mui-btn--outline {
    background: var(--ui-surface, #fff);
    color: var(--btn-border);
    border-color: color-mix(in srgb, var(--btn-border) 36%, var(--ui-border, #e5e7eb));
}

.mui-btn--outline:hover {
    color: var(--btn-border);
    background: color-mix(in srgb, var(--btn-border) 7%, var(--ui-surface, #fff));
    filter: none;
}

.mui-btn--sm {
    min-height: 32px;
    padding: 0.38rem 0.62rem;
    font-size: 0.78rem;
}

.mui-btn--md {
    min-height: 38px;
    padding: 0.52rem 0.82rem;
    font-size: 0.83rem;
}

.mui-btn--lg {
    min-height: 42px;
    padding: 0.62rem 0.95rem;
    font-size: 0.88rem;
}

.mui-btn--icon-only {
    padding: 0;
    gap: 0;
}

.mui-btn--icon-only.mui-btn--sm {
    width: 32px;
    min-width: 32px;
    height: 32px;
}

.mui-btn--icon-only.mui-btn--md {
    width: 38px;
    min-width: 38px;
    height: 38px;
}

.mui-btn--icon-only.mui-btn--lg {
    width: 42px;
    min-width: 42px;
    height: 42px;
}

.mui-btn--icon-only .mui-btn__content {
    gap: 0;
}

.mui-btn i {
    font-size: 0.95rem;
    line-height: 1;
}

[data-bs-theme="dark"] .mui-btn {
    box-shadow: none;
}

[data-bs-theme="dark"] .mui-btn--outline {
    background: var(--ui-surface, #111827);
    border-color: color-mix(in srgb, var(--btn-border) 42%, var(--ui-border, #273244));
}

[data-bs-theme="dark"] .mui-btn--outline:hover {
    background: color-mix(in srgb, var(--btn-border) 14%, var(--ui-surface, #111827));
}