/* ====================================
   UI Polish & Loading States
   ==================================== */

/* Global Loading Overlay */
.global-loading-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100000;
    transition: opacity var(--transition-normal);
}

.global-loading-overlay.active {
    display: flex;
}

.loading-spinner-container {
    text-align: center;
    color: white;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--color-accent-gold);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
    margin: 0 auto var(--space-4);
}

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

.loading-text {
    font-size: var(--text-lg);
    font-weight: var(--font-medium);
}

/* Skeleton Loaders */
.skeleton-loader {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.6;
    }
}

.skeleton-header {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.skeleton-avatar {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

.skeleton-avatar-sm {
    width: 40px;
    height: 40px;
}

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

    100% {
        background-position: -200% 0;
    }
}

.skeleton-text-block {
    flex: 1;
}

.skeleton-text {
    height: 16px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 4px;
    margin-bottom: var(--space-2);
}

.skeleton-text-lg {
    height: 24px;
    width: 70%;
}

.skeleton-text-sm {
    height: 12px;
    width: 50%;
}

.skeleton-body {
    margin-top: var(--space-4);
}

.skeleton-list-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
}

/* Form Validation States */
input.invalid,
textarea.invalid,
select.invalid {
    border-color: var(--color-error) !important;
    animation: shake 0.3s ease-in-out;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-5px);
    }

    75% {
        transform: translateX(5px);
    }
}

input.valid,
textarea.valid,
select.valid {
    border-color: var(--color-success) !important;
}

.field-error {
    color: var(--color-error);
    font-size: var(--text-sm);
    margin-top: var(--space-2);
    display: flex;
    align-items: center;
    gap: var(--space-1);
    animation: slideDown 0.2s ease-out;
}

.field-error::before {
    content: '⚠';
    font-size: 14px;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Smooth Transitions */
.transitions-enabled * {
    transition: background-color var(--transition-fast),
        color var(--transition-fast),
        border-color var(--transition-fast),
        transform var(--transition-fast),
        opacity var(--transition-fast);
}

/* Fade In Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.fade-in-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Button Loading State */
.btn.loading {
    position: relative;
    color: transparent !important;
    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 rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* Error States */
.error-banner {
    background-color: var(--color-error-light);
    color: var(--color-error);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    animation: slideDown 0.3s ease-out;
}

.error-banner-icon {
    font-size: 24px;
}

.warning-banner {
    background-color: var(--color-warning-light);
    color: var(--color-warning);
}

.success-banner {
    background-color: var(--color-success-light);
    color: var(--color-success);
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: var(--space-12);
    color: var(--color-text-secondary);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--space-4);
    opacity: 0.3;
}

.empty-state h3 {
    margin-bottom: var(--space-2);
}

.empty-state p {
    margin-bottom: var(--space-6);
}

/* Focus States */
*:focus-visible {
    outline: 3px solid var(--color-accent-gold);
    outline-offset: 2px;
}

/* Disabled States */
button:disabled,
input:disabled,
textarea:disabled,
select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Loading Placeholder Shimmer */
.loading-placeholder {
    position: relative;
    overflow: hidden;
    background-color: var(--color-bg-secondary);
}

.loading-placeholder::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: linear-gradient(90deg,
            transparent,
            rgba(255, 255, 255, 0.3),
            transparent);
    animation: shimmer 1.5s infinite;
}

/* Offline Banner */
.offline-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--color-error);
    color: white;
    padding: var(--space-3);
    text-align: center;
    z-index: 10000;
    transform: translateY(100%);
    transition: transform var(--transition-normal);
}

.offline-banner.active {
    transform: translateY(0);
}

/* Tooltips */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: var(--space-2) var(--space-3);
    background-color: rgba(0, 0, 0, 0.9);
    color: white;
    font-size: var(--text-sm);
    white-space: nowrap;
    border-radius: var(--radius-md);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
}

[data-tooltip]:hover::after {
    opacity: 1;
}