/* 메인 홈 플레이스홀더 전환 효과 */
#home-section .placeholder-transition {
    transition: opacity 0.5s ease-in-out, transform 0.5s ease-in-out;
}
#home-section .placeholder-hidden {
    opacity: 0;
    transform: translateY(-10px);
}
#home-section .placeholder-visible {
    opacity: 1;
    transform: translateY(0);
}

/* 로딩 섹션 (Stitch Loading CSS) */
#loading-section .spinner {
    width: 48px;
    height: 48px;
    border: 4px solid #efedf1; /* surface-container */
    border-top: 4px solid #1a73e8; /* primary-container */
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
        
#loading-section .pulse-text {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: .5; }
}