/* ========================================
   LOADING SKELETONS
   Item 53/78: Content loading placeholders
   ======================================== */

/* ====================================
   PULSE ANIMATION
   ==================================== */

@keyframes skeleton-pulse {
    0% {
        opacity: 1;
    }
    50% {
        opacity: 0.4;
    }
    100% {
        opacity: 1;
    }
}

@keyframes skeleton-shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

/* ====================================
   BASE SKELETON STYLES
   ==================================== */

.skeleton {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    animation: skeleton-pulse 1.5s ease-in-out infinite;
    position: relative;
    overflow: hidden;
}

.skeleton::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    animation: skeleton-shimmer 2s infinite;
}

/* Skeleton with shimmer effect */
.skeleton-shimmer {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.05) 0%,
        rgba(255, 255, 255, 0.15) 50%,
        rgba(255, 255, 255, 0.05) 100%
    );
    background-size: 1000px 100%;
    animation: skeleton-shimmer 2s infinite;
}

/* ====================================
   SKELETON SHAPES
   ==================================== */

/* Text line skeleton */
.skeleton-text {
    height: 16px;
    width: 100%;
    margin: 8px 0;
}

.skeleton-text-short {
    width: 60%;
}

.skeleton-text-medium {
    width: 80%;
}

.skeleton-text-long {
    width: 100%;
}

/* Heading skeleton */
.skeleton-heading {
    height: 32px;
    width: 70%;
    margin: 16px 0;
}

.skeleton-heading-large {
    height: 48px;
    width: 80%;
}

/* Avatar/Circle skeleton */
.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

.skeleton-avatar-small {
    width: 32px;
    height: 32px;
}

.skeleton-avatar-large {
    width: 64px;
    height: 64px;
}

/* Image skeleton */
.skeleton-image {
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    border-radius: 12px;
}

.skeleton-image-square {
    padding-bottom: 100%; /* 1:1 aspect ratio */
}

.skeleton-image-portrait {
    padding-bottom: 133%; /* 3:4 aspect ratio */
}

/* Button skeleton */
.skeleton-button {
    height: 44px;
    width: 120px;
    border-radius: 12px;
}

.skeleton-button-large {
    height: 52px;
    width: 160px;
}

/* Badge/Pill skeleton */
.skeleton-badge {
    height: 24px;
    width: 80px;
    border-radius: 24px;
}

/* Icon skeleton */
.skeleton-icon {
    width: 24px;
    height: 24px;
    border-radius: 4px;
}

/* ====================================
   SKELETON CARDS
   ==================================== */

/* Feature card skeleton */
.skeleton-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Use case card skeleton */
.skeleton-use-case {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 30px;
}

.skeleton-use-case-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    margin-bottom: 16px;
}

/* Testimonial skeleton */
.skeleton-testimonial {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 30px;
}

.skeleton-testimonial-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

/* ====================================
   SKELETON LAYOUTS
   ==================================== */

/* Grid of skeleton cards */
.skeleton-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
    margin: 40px 0;
}

/* List of skeleton items */
.skeleton-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.skeleton-list-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
}

/* ====================================
   SPECIFIC COMPONENTS
   ==================================== */

/* Newsletter popup skeleton */
.skeleton-newsletter {
    width: 100%;
    max-width: 500px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 24px;
    padding: 40px;
}

/* Social proof skeleton */
.skeleton-social-proof {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
}

/* Phone mockup skeleton */
.skeleton-phone {
    width: 100%;
    max-width: 360px;
    aspect-ratio: 9/19.5;
    border-radius: 32px;
    background: rgba(255, 255, 255, 0.05);
    border: 8px solid rgba(255, 255, 255, 0.1);
}

/* Stats skeleton */
.skeleton-stat {
    text-align: center;
}

.skeleton-stat-number {
    height: 48px;
    width: 120px;
    margin: 0 auto 8px;
}

.skeleton-stat-label {
    height: 16px;
    width: 80px;
    margin: 0 auto;
}

/* ====================================
   HERO SECTION SKELETON
   ==================================== */

.skeleton-hero {
    padding: 80px 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.skeleton-hero-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ====================================
   LOADING STATES
   ==================================== */

/* Hide real content when loading */
.loading-container {
    position: relative;
}

.loading-container.is-loading > *:not(.skeleton):not(.skeleton-grid):not(.skeleton-hero) {
    opacity: 0;
    pointer-events: none;
}

/* Fade in when loaded */
.loaded {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ====================================
   RESPONSIVE
   ==================================== */

@media (max-width: 768px) {
    .skeleton-hero {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .skeleton-grid {
        grid-template-columns: 1fr;
    }
    
    .skeleton-heading {
        height: 24px;
        width: 90%;
    }
    
    .skeleton-phone {
        max-width: 280px;
    }
}

/* ====================================
   UTILITY CLASSES
   ==================================== */

/* No animation (reduced motion) */
@media (prefers-reduced-motion: reduce) {
    .skeleton,
    .skeleton::after {
        animation: none;
    }
}

/* Dark skeleton for light backgrounds */
.skeleton-dark {
    background: rgba(0, 0, 0, 0.1);
}

.skeleton-dark::after {
    background: linear-gradient(
        90deg,
        transparent,
        rgba(0, 0, 0, 0.1),
        transparent
    );
}

/* Skeleton spacing */
.skeleton-gap-sm {
    gap: 8px;
}

.skeleton-gap-md {
    gap: 16px;
}

.skeleton-gap-lg {
    gap: 24px;
}