/**
 * Loading States Styles
 */

/* Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 159, 174, 0.3);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 0.6s linear infinite;
}

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

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.loading-overlay.show {
    opacity: 1;
    visibility: visible;
}

.loading-overlay-content {
    background: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-xl);
}

.loading-overlay-content .spinner {
    width: 40px;
    height: 40px;
    border-width: 4px;
    margin-bottom: var(--spacing-md);
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, 
        var(--color-gray) 25%, 
        rgba(255, 255, 255, 0.5) 50%, 
        var(--color-gray) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.skeleton-text {
    height: 1em;
    margin-bottom: var(--spacing-sm);
}

.skeleton-title {
    height: 1.5em;
    width: 60%;
    margin-bottom: var(--spacing-md);
}

.skeleton-card {
    height: 200px;
    border-radius: var(--radius-lg);
}

/* Button Loading State */
.btn-loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid currentColor;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 0.6s linear infinite;
}

/* Form Loading */
.form-loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.form-loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Page Loading */
.page-loading {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-loading .spinner {
    width: 50px;
    height: 50px;
    border-width: 5px;
}