/* =========================
   HOME BUTTON - BOTTOM RIGHT, MINIMAL (Khóa học)
   ========================= */
.home-btn-courses {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 999;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    overflow: hidden;
    padding: 8px;
    width: 36px;
    height: 36px;
    background: rgba(16, 185, 129, 0.6);
    color: #ffffff;
    font-weight: 700;
    font-size: 0.75rem;
    border-radius: 50%;
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    opacity: 0.6;
}

.home-btn-courses:hover {
    transform: scale(1.1);
    width: auto;
    padding: 8px 14px;
    gap: 6px;
    border-radius: 50px;
    opacity: 1;
    background: rgba(16, 185, 129, 0.9);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.home-btn-courses:active { transform: scale(1.05); }
.home-btn-courses i { font-size: 1rem; transition: transform 0.3s ease; flex-shrink: 0; }
.home-btn-courses:hover i { transform: rotate(-10deg); }
.home-btn-courses span {
    white-space: nowrap; max-width: 0; opacity: 0; font-size: 0.75rem; transition: all 0.3s ease;
}
.home-btn-courses:hover span { max-width: 100px; opacity: 1; margin-left: 4px; }

@media (max-width: 640px) {
    .home-btn-courses { bottom: 16px; right: 16px; padding: 12px; min-width: 48px; min-height: 48px; }
    .home-btn-courses span { display: none; }
    .home-btn-courses i { font-size: 1.2rem; margin: 0; }
}