/* ========================================
   MVidarr Unified Loading States & Feedback
   Comprehensive loading and user feedback system
======================================== */

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

/* Base Loading Container */
.loading-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60px;
}

.loading-container.full-page {
    min-height: 400px;
    background-color: var(--bg-primary);
}

/* Loading Overlay */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(var(--bg-primary-rgb), 0.8);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

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

/* Loading Spinner */
.loading-spinner {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* MVIDARR Logo Spinner */
.mvidarr-logo-spinner {
    animation: spin 1s linear infinite;
    display: inline-block;
}

/* Generic spinning class for any element */
.spinning {
    animation: spin 1s linear infinite;
}

.loading-spinner.large {
    width: 48px;
    height: 48px;
    border-width: 4px;
}

.loading-spinner.small {
    width: 16px;
    height: 16px;
    border-width: 1px;
}

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

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-tertiary) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: skeleton-pulse 2s ease-in-out infinite;
    border-radius: var(--radius-md);
}

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

/* Skeleton Variants */
.skeleton-text {
    height: 20px;
    margin: 8px 0;
    border-radius: var(--radius-sm);
}

.skeleton-text.large {
    height: 32px;
}

.skeleton-text.small {
    height: 16px;
}

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

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

.skeleton-card {
    height: 120px;
    margin: var(--space-4) 0;
}

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

.skeleton-thumbnail {
    width: 100px;
    height: 75px;
    border-radius: var(--radius-sm);
}

/* Dots Loading Indicator */
.loading-dots {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.loading-dots span {
    width: 6px;
    height: 6px;
    background-color: var(--text-secondary);
    border-radius: 50%;
    animation: dot-bounce 1.4s ease-in-out infinite both;
}

.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes dot-bounce {
    0%, 80%, 100% { transform: scale(0.8); opacity: 0.5; }
    40% { transform: scale(1); opacity: 1; }
}

/* Progress Bar Loading */
.progress-loading {
    width: 100%;
    height: 4px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.progress-loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--btn-primary-bg), transparent);
    animation: progress-slide 2s ease-in-out infinite;
}

@keyframes progress-slide {
    0% { left: -50%; }
    100% { left: 100%; }
}

/* Button Loading States */
.btn.loading {
    position: relative;
    color: transparent;
    cursor: not-allowed;
    pointer-events: none;
}

.btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -8px 0 0 -8px;
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Card Loading States */
.card.loading {
    position: relative;
    overflow: hidden;
}

.card.loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent 25%, rgba(255, 255, 255, 0.4) 50%, transparent 75%);
    background-size: 200% 100%;
    animation: card-shimmer 2s ease-in-out infinite;
    z-index: 1;
}

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

/* =====================================
   FEEDBACK STATES
===================================== */

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: var(--space-4);
    right: var(--space-4);
    z-index: 9999;
    max-width: 400px;
}

.toast {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    margin-bottom: var(--space-3);
    padding: var(--space-4);
    opacity: 0;
    transform: translateX(100%);
    transition: all var(--transition-normal);
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast.hide {
    opacity: 0;
    transform: translateX(100%);
}

.toast-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-2);
}

.toast-title {
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.toast-close:hover {
    background-color: var(--bg-tertiary);
}

.toast-body {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

/* Toast Variants */
.toast.success {
    border-left: 4px solid var(--success);
}

.toast.success .toast-title {
    color: var(--success);
}

.toast.error {
    border-left: 4px solid var(--error);
}

.toast.error .toast-title {
    color: var(--error);
}

.toast.warning {
    border-left: 4px solid var(--warning);
}

.toast.warning .toast-title {
    color: var(--warning);
}

.toast.info {
    border-left: 4px solid var(--info);
}

.toast.info .toast-title {
    color: var(--info);
}

/* Inline Success/Error States */
.state-message {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    margin: var(--space-3) 0;
}

.state-message.success {
    background-color: rgba(34, 197, 94, 0.1);
    color: var(--success);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.state-message.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.state-message.warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.state-message.info {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--info);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

/* State Icons */
.state-message::before {
    font-size: 16px;
    font-weight: var(--font-weight-bold);
}

.state-message.success::before { content: "✓"; }
.state-message.error::before { content: "✗"; }
.state-message.warning::before { content: "⚠"; }
.state-message.info::before { content: "ℹ"; }

/* Form Validation States */
.form-field.success .form-input {
    border-color: var(--success);
    background-color: rgba(34, 197, 94, 0.05);
}

.form-field.success .form-label {
    color: var(--success);
}

.form-field.error .form-input {
    border-color: var(--error);
    background-color: rgba(239, 68, 68, 0.05);
}

.form-field.error .form-label {
    color: var(--error);
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: var(--space-8);
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: var(--space-4);
    opacity: 0.5;
}

.empty-state-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.empty-state-description {
    margin-bottom: var(--space-4);
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* Error Page States */
.error-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    text-align: center;
    padding: var(--space-8);
}

.error-code {
    font-size: 6rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-muted);
    line-height: 1;
    margin-bottom: var(--space-4);
}

.error-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.error-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    max-width: 500px;
    line-height: 1.6;
}

/* Connection Status */
.connection-status {
    position: fixed;
    bottom: var(--space-4);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    z-index: 999;
    transition: all var(--transition-fast);
}

.connection-status.online {
    background-color: var(--success);
    color: white;
}

.connection-status.offline {
    background-color: var(--error);
    color: white;
}

.connection-status.reconnecting {
    background-color: var(--warning);
    color: white;
}

/* Progress Indicators */
.progress-step {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin: var(--space-3) 0;
}

.progress-step-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    flex-shrink: 0;
}

.progress-step.completed .progress-step-icon {
    background-color: var(--success);
    color: white;
}

.progress-step.active .progress-step-icon {
    background-color: var(--btn-primary-bg);
    color: white;
}

.progress-step.error .progress-step-icon {
    background-color: var(--error);
    color: white;
}

.progress-step-text {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.progress-step.completed .progress-step-text,
.progress-step.active .progress-step-text {
    color: var(--text-primary);
    font-weight: var(--font-weight-medium);
}

/* Reduced Motion Preferences */
@media (prefers-reduced-motion: reduce) {
    .loading-spinner {
        animation: none;
        border-top-color: var(--btn-primary-bg);
    }
    
    .skeleton {
        animation: none;
        background: var(--bg-secondary);
    }
    
    .loading-dots span {
        animation: none;
        opacity: 1;
        transform: scale(1);
    }
    
    .progress-loading::after {
        animation: none;
        left: 0;
        width: 100%;
        background: var(--btn-primary-bg);
    }
    
    .toast {
        transition: opacity var(--transition-fast);
        transform: none;
    }
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .toast-container {
        right: var(--space-2);
        left: var(--space-2);
        max-width: none;
    }
    
    .toast {
        margin-bottom: var(--space-2);
    }
    
    .connection-status {
        bottom: var(--space-2);
        left: var(--space-2);
        right: var(--space-2);
        transform: none;
        text-align: center;
    }
    
    .error-code {
        font-size: 4rem;
    }
}