/**
 * Standardized "Load More" button component.
 *
 * Single source of truth for every load-more / "show more" button across the
 * site (archive, taxonomies, search, profile library, chapters). Pure CSS so it
 * is not affected by the prebuilt-Tailwind pitfall (new utility strings silently
 * fail). Markup contract:
 *
 *   <div class="...wrapper... relative flex justify-center">
 *     <div class="load-more-glow"></div>
 *     <button class="load-more-btn">
 *       <div class="load-more-shimmer"></div>
 *       <div class="load-more-inner-glow"></div>
 *       <div class="load-more-content">
 *         <span class="load-more-text">…</span>
 *         <div class="load-more-icon-wrapper">
 *           <i data-lucide="chevron-down" class="load-more-chevron"></i>
 *           <div class="load-more-spinner hidden"><div class="load-more-spinner-inner"></div></div>
 *         </div>
 *       </div>
 *     </button>
 *   </div>
 */

/* Background Glow */
.load-more-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 320px;
    height: 128px;
    background: radial-gradient(circle, rgba(249, 115, 22, 0.15) 0%, rgba(245, 158, 11, 0.05) 50%, transparent 70%);
    pointer-events: none;
    animation: load-more-pulse-glow 3s ease-in-out infinite;
}

@keyframes load-more-pulse-glow {
    0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.8; transform: translate(-50%, -50%) scale(1.1); }
}

/* Button Base Styles */
.load-more-btn {
    position: relative;
    padding: 14px 40px;
    background: rgba(24, 24, 27, 0.95);
    color: #e4e4e7;
    border: 1px solid rgba(63, 63, 70, 0.6);
    border-radius: 16px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.025em;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.load-more-btn:hover {
    background: linear-gradient(135deg, #ea580c, #f97316, #fbbf24);
    color: #ffffff;
    border-color: rgba(251, 146, 60, 0.7);
    box-shadow: 0 10px 50px rgba(249, 115, 22, 0.35);
    transform: translateY(-2px);
}

.load-more-btn:active {
    transform: translateY(0) scale(0.97);
}

.load-more-btn:disabled,
.load-more-btn.pointer-events-none {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Shimmer Effect */
.load-more-shimmer {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.1), transparent);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.load-more-btn:hover .load-more-shimmer {
    opacity: 1;
    animation: load-more-shimmer 2s infinite;
}

@keyframes load-more-shimmer {
    0% { transform: translateX(-100%) skewX(-15deg); }
    100% { transform: translateX(200%) skewX(-15deg); }
}

/* Inner Glow */
.load-more-inner-glow {
    position: absolute;
    inset: 1px;
    border-radius: 15px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), transparent);
    opacity: 0;
    transition: opacity 0.5s;
    pointer-events: none;
}

.load-more-btn:hover .load-more-inner-glow {
    opacity: 1;
}

/* Content */
.load-more-content {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    z-index: 10;
}

.load-more-text {
    transition: letter-spacing 0.3s;
}

.load-more-btn:hover .load-more-text {
    letter-spacing: 0.05em;
}

/* Icon Wrapper */
.load-more-icon-wrapper {
    position: relative;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.load-more-chevron {
    width: 20px;
    height: 20px;
    transition: all 0.3s;
}

.load-more-btn:hover .load-more-chevron {
    transform: translateY(2px) scale(1.1);
}

/* Spinner */
.load-more-spinner {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.load-more-spinner.hidden {
    display: none;
}

.load-more-spinner-inner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(63, 63, 70, 0.6);
    border-top-color: #f97316;
    border-radius: 50%;
    animation: load-more-spin 0.8s linear infinite;
}

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