/* UI Kit: reusable component primitives. */
button,
input,
select,
textarea {
    font: inherit;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.ui-btn,
.btn,
.primary-btn,
.secondary-btn,
.danger-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: 38px;
    padding: 9px 16px;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    background: var(--color-bg-muted);
    color: var(--color-text-primary);
    font-size: 14px;
    font-weight: 700;
    line-height: 1.1;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
    transition:
        background var(--duration-base) var(--ease-standard),
        border-color var(--duration-base) var(--ease-standard),
        color var(--duration-base) var(--ease-standard),
        box-shadow var(--duration-base) var(--ease-standard),
        transform var(--duration-fast) var(--ease-standard);
}

.ui-btn:hover,
.btn:hover,
.primary-btn:hover,
.secondary-btn:hover,
.danger-btn:hover {
    transform: translateY(-1px);
}

.ui-btn:active,
.btn:active,
.primary-btn:active,
.secondary-btn:active,
.danger-btn:active {
    transform: translateY(0);
}

.ui-btn:disabled,
.btn:disabled,
.primary-btn:disabled,
.secondary-btn:disabled,
.danger-btn:disabled {
    opacity: 0.56;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.ui-btn--primary,
.btn-primary,
.primary-btn {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-strong) 100%);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-accent);
}

.ui-btn--primary:hover,
.btn-primary:hover,
.primary-btn:hover {
    background: linear-gradient(135deg, var(--color-accent-hover) 0%, var(--color-accent-strong) 100%);
}

.ui-btn--secondary,
.btn-secondary,
.secondary-btn {
    background: color-mix(in srgb, var(--color-bg-muted) 74%, transparent);
    border-color: var(--color-border-subtle);
    color: var(--color-text-primary);
}

.ui-btn--secondary:hover,
.btn-secondary:hover,
.secondary-btn:hover {
    background: var(--color-bg-muted);
    border-color: var(--color-border-strong);
}

.ui-btn--ghost {
    background: transparent;
    border-color: transparent;
    color: var(--color-text-secondary);
}

.ui-btn--ghost:hover {
    background: var(--color-accent-soft);
    color: var(--color-text-primary);
}

.ui-btn--danger,
.btn-danger,
.danger-btn {
    background: linear-gradient(135deg, var(--color-danger) 0%, #e34b71 100%);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-danger);
}

.ui-btn--danger:hover,
.btn-danger:hover,
.danger-btn:hover {
    background: linear-gradient(135deg, var(--color-danger-hover) 0%, #ef5f84 100%);
}

.ui-btn--icon {
    width: 38px;
    min-width: 38px;
    height: 38px;
    padding: 0;
    border-radius: var(--radius-md);
}

.ui-btn--sm,
.btn-sm {
    min-height: 32px;
    padding: 6px 12px;
    border-radius: 10px;
    font-size: 12px;
}

.ui-btn--lg {
    min-height: 46px;
    padding: 12px 20px;
    border-radius: var(--radius-lg);
    font-size: 15px;
}

.ui-btn--block {
    width: 100%;
}