/* --- Interaction Styles --- */

/* Reading Progress Bar */
.progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: transparent;
    z-index: 9999;
}

#reading-progress {
    height: 100%;
    background: var(--color-primary);
    width: 0%;
    box-shadow: 0 0 10px var(--color-primary);
    transition: width 0.1s ease;
}

/* Search Overlay */
#search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(20px);
    z-index: 10000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.77, 0, 0.175, 1);
}

#search-overlay.is-active {
    opacity: 1;
    visibility: visible;
}

.search-overlay-content {
    width: 90%;
    max-width: 800px;
    text-align: center;
    transform: translateY(20px);
    transition: transform 0.4s ease;
}

#search-overlay.is-active .search-overlay-content {
    transform: translateY(0);
}

.search-overlay-form {
    position: relative;
}

.search-overlay-form input {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--color-border);
    color: #fff;
    font-size: 2.5rem;
    font-family: var(--font-heading);
    padding: 1rem 0;
    text-align: center;
    transition: border-color 0.3s ease;
}

@media (min-width: 768px) {
    .search-overlay-form input {
        font-size: 4rem;
    }
}

.search-overlay-form input:focus {
    outline: none;
    border-color: var(--color-primary);
}

#search-close {
    position: absolute;
    top: 40px;
    right: 40px;
    background: transparent;
    border: none;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

#search-close:hover {
    opacity: 1;
}

.search-hint {
    margin-top: 2rem;
    color: var(--color-text-muted);
    font-size: 1rem;
    letter-spacing: 1px;
}

/* Skeleton Loading Effect */
.skeleton {
    background: linear-gradient(90deg, #1a1a1a 25%, #222 50%, #1a1a1a 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}