/**
 * Loading Indicators and Overlays for Payment Portal
 *
 * Provides accessible loading states, spinners, and overlay components
 * for async operations and form submissions.
 */

/* ===== Spinner ===== */

/* The one spinner. Used by csr_dashboard's async history panel. */
.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* ===== Progress Bar ===== */
.progress-bar-container {
    width: 100%;
    max-width: 400px;
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin: var(--s-5) 0;
}

.progress-bar {
    height: 100%;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
    border-radius: 4px;
}

.progress-bar.indeterminate {
    width: 30%;
    animation: progress-indeterminate 1.5s ease-in-out infinite;
}

@keyframes progress-indeterminate {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(400%);
    }
}

/* ===== Skeleton Loaders ===== */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--surface-alt-color) 25%,
        var(--border-color) 50%,
        var(--surface-alt-color) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: 4px;
}

.skeleton-text {
    height: 16px;
    margin-bottom: var(--s-2);
}

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

/* ===== Form Field Loading State ===== */
.form-group.loading {
    position: relative;
}

.form-group.loading::after {
    content: '';
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.form-group.loading input,
.form-group.loading select {
    padding-right: 40px;
}

/* ===== Shimmer Effect ===== */
.shimmer {
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    animation: shimmer 2s infinite;
    background-size: 200% 100%;
}

body.dark-mode .shimmer {
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
}

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

/* ===== Responsive Adjustments ===== */
@media (max-width: 768px) {
    .spinner {
        width: 40px;
        height: 40px;
        border-width: 3px;
    }
}

@media (max-width: 480px) {
    .spinner {
        width: 35px;
        height: 35px;
    }
}

/* ===== Utility Classes ===== */

/* Disable interactions during loading */
.no-interaction {
    pointer-events: none;
    user-select: none;
}