.btn {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-xs);
    min-height: var(--button-height);
    padding-inline: 1.25rem;
    border:
        var(--border-size)
        solid
        transparent;
    border-radius: var(--border-radius);
    background: rgba(255,255,255,0.03);
    color: var(--color-text);
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    transition:
        transform var(--transition-fast),
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        opacity var(--transition-fast),
        box-shadow var(--transition-fast);
}

.btn svg {
    color: var(--color-text);
    width: 1rem;
    height: 1rem;
}

.btn:hover:not(:disabled) {
    transform: scale(1.03);
    background: rgba(255,255,255,0.06);
}

.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
}

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

@media (prefers-reduced-motion: reduce) {
    .btn {
        transition: none;
    }

    .btn:hover:not(:disabled) {
        transform: none;
    }
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-bg);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-hover-primary);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    border-color: var(--color-border);
    background: rgba(255,255,255,0.03);
}

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

.btn-icon {
    min-height: auto;
    padding: 0.75rem 1rem;
    border-radius: 999px;
}

.is-selected {
    border-color: var(--color-primary);
    background: rgba(56, 189, 248, 0.10);
    box-shadow: var(--shadow-glow);
}