/* ======================================================================
   SKELETON SCREENS
   ====================================================================== */

.skeleton-screen {
    position: fixed;
    inset: 0;
    z-index: 9998;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-mid) 50%, var(--bg-gradient-end) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    opacity: 1;
    transition: opacity 0.35s ease;
}

[data-theme="light"] .skeleton-screen {
    background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 50%, #F1F5F9 100%);
}

.skeleton-screen.is-hidden {
    opacity: 0;
}

.skeleton-container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.skeleton-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(138, 43, 226, 0.12);
    border-radius: 18px;
    padding: 24px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
    backdrop-filter: blur(10px);
}

[data-theme="light"] .skeleton-card {
    background: rgba(255, 255, 255, 0.7);
    border-color: rgba(107, 27, 154, 0.12);
}

.skeleton-block {
    height: 14px;
    border-radius: 8px;
    background: linear-gradient(90deg, rgba(255,255,255,0.08) 0%, rgba(255,255,255,0.18) 50%, rgba(255,255,255,0.08) 100%);
    background-size: 200% 100%;
    animation: skeletonShimmer 1.2s ease-in-out infinite;
}

[data-theme="light"] .skeleton-block {
    background: linear-gradient(90deg, rgba(107,27,154,0.08) 0%, rgba(107,27,154,0.18) 50%, rgba(107,27,154,0.08) 100%);
}

.skeleton-block.lg { height: 22px; }
.skeleton-block.md { height: 16px; }
.skeleton-block.sm { height: 12px; }

.skeleton-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.skeleton-stack {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.skeleton-grid {
    display: grid;
    gap: 18px;
}

.skeleton-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.skeleton-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }

.skeleton-pill {
    height: 32px;
    min-width: 90px;
    border-radius: 999px;
}

@keyframes skeletonShimmer {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

/* Index skeleton */
.skeleton-index .skeleton-hero {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 28px;
    margin-bottom: 28px;
}

.skeleton-index .skeleton-card-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

/* Blog list skeleton */
.skeleton-blog .skeleton-card-list,
.skeleton-certifications .skeleton-card-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

/* Blog post skeleton */
.skeleton-post .skeleton-post-header {
    max-width: 860px;
    margin: 0 auto 18px;
}

.skeleton-post .skeleton-featured {
    height: 240px;
    border-radius: 16px;
}

.skeleton-post .skeleton-post-body {
    max-width: 860px;
    margin: 18px auto 0;
}

@media (max-width: 992px) {
    .skeleton-index .skeleton-hero {
        grid-template-columns: 1fr;
    }

    .skeleton-grid.cols-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .skeleton-grid.cols-3,
    .skeleton-grid.cols-2,
    .skeleton-index .skeleton-card-list {
        grid-template-columns: 1fr;
    }
}