.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--s-2);
    padding: 14px 28px;
    font-size: var(--fz-base);
    font-weight: 600;
    border-radius: var(--r-full);
    transition: transform var(--t-fast), box-shadow var(--t-fast), opacity var(--t-fast);
    white-space: nowrap;
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn:hover  { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
    background: var(--grad-accent);
    color: #fff;
    box-shadow: 0 4px 20px rgba(249, 115, 22, 0.35);
}

.btn--primary:hover {
    box-shadow: 0 8px 30px rgba(249, 115, 22, 0.5);
}

.btn--outline {
    background: transparent;
    color: var(--text-1);
    border: 1px solid var(--border-hover);
}

.btn--outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(249, 115, 22, 0.06);
}

.btn--ghost {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-1);
    border: 1px solid var(--border);
    backdrop-filter: var(--glass-blur);
}

.btn--ghost:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn--sm {
    padding: 10px 20px;
    font-size: var(--fz-sm);
}

.btn--lg {
    padding: 18px 36px;
    font-size: var(--fz-md);
}

.btn--full { width: 100%; }

.btn--loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn__spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}