.sem-subscribe {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: #f8fafc;
    border-radius: 1rem;
    margin: 2rem 0;
}
.sem-subscribe-title { font-size: 1.75rem; color: #fff; }
.sem-subscribe-text { color: #cbd5e1; line-height: 1.6; font-size: 1.05rem; }

.sem-subscribe-btn {
    background: #3b82f6;
    border: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
}
.sem-subscribe-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
}
.sem-subscribe-btn:disabled { opacity: 0.65; cursor: not-allowed; }

.sem-social-btn {
    width: 48px; height: 48px;
    border: 1px solid rgba(255,255,255,0.25);
    color: #fff;
    background: transparent;
    transition: background 0.2s, border-color 0.2s, transform 0.2s, color 0.2s;
}
.sem-social-btn:hover {
    background: #fff;
    color: #0f172a;
    border-color: #fff;
    transform: translateY(-3px);
}

@media (max-width: 576px) {
    .sem-subscribe { border-radius: 0; margin: 1rem 0; }
    .sem-subscribe-title { font-size: 1.5rem; }
    .sem-subscribe-text { font-size: 0.95rem; }
    .sem-social-btn { width: 42px; height: 42px; }
}