/* ========================================
   LOADING STATES & ANIMATIONS
   ======================================== */

/* Skeleton Loader Base */
.skeleton {
    background: linear-gradient(90deg,
            var(--bg-card) 0%,
            var(--bg-hover) 50%,
            var(--bg-card) 100%);
    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 Card */
.skeleton-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    overflow: hidden;
}

.skeleton-image {
    width: 100%;
    aspect-ratio: 1;
    background: linear-gradient(90deg,
            rgba(255, 255, 255, 0.05) 0%,
            rgba(255, 255, 255, 0.1) 50%,
            rgba(255, 255, 255, 0.05) 100%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

.skeleton-text {
    height: 16px;
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(90deg,
            rgba(255, 255, 255, 0.05) 0%,
            rgba(255, 255, 255, 0.1) 50%,
            rgba(255, 255, 255, 0.05) 100%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: 4px;
}

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

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

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

/* Spinner */
.spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spinner-rotate 0.8s linear infinite;
}

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.spinner-lg {
    width: 60px;
    height: 60px;
    border-width: 6px;
}

@keyframes spinner-rotate {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Spinner Container */
.spinner-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.spinner-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Progress Bar */
.progress-bar-container {
    width: 100%;
    height: 8px;
    background: var(--bg-dark);
    border-radius: 100px;
    overflow: hidden;
    position: relative;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #6366f1 0%, #a78bfa 100%);
    border-radius: 100px;
    transition: width 0.3s ease;
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg,
            transparent 0%,
            rgba(255, 255, 255, 0.3) 50%,
            transparent 100%);
    animation: progress-shine 1.5s ease-in-out infinite;
}

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

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

.progress-text {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Upload Progress Card */
.upload-progress-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.upload-file-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.upload-file-icon {
    width: 40px;
    height: 40px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.upload-file-details {
    flex: 1;
}

.upload-file-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.upload-file-size {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    pointer-events: none;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    min-width: 300px;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(20px);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    pointer-events: all;
    animation: toast-slide-in 0.3s ease-out;
    position: relative;
    overflow: hidden;
}

.toast.removing {
    animation: toast-slide-out 0.3s ease-out forwards;
}

@keyframes toast-slide-in {
    from {
        transform: translateX(400px);
        opacity: 0;
    }

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

@keyframes toast-slide-out {
    from {
        transform: translateX(0);
        opacity: 1;
    }

    to {
        transform: translateX(400px);
        opacity: 0;
    }
}

.toast-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.toast-message {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.toast-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

/* Toast Types */
.toast.success {
    border-left: 4px solid #22c55e;
}

.toast.success .toast-icon {
    background: rgba(34, 197, 94, 0.2);
    color: #22c55e;
}

.toast.error {
    border-left: 4px solid #ef4444;
}

.toast.error .toast-icon {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

.toast.warning {
    border-left: 4px solid #f59e0b;
}

.toast.warning .toast-icon {
    background: rgba(245, 158, 11, 0.2);
    color: #f59e0b;
}

.toast.info {
    border-left: 4px solid #3b82f6;
}

.toast.info .toast-icon {
    background: rgba(59, 130, 246, 0.2);
    color: #3b82f6;
}

/* Pulse Animation */
.pulse {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

/* Fade In Animation */
.fade-in {
    animation: fade-in 0.5s ease-out;
}

@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

/* Slide Up Animation */
.slide-up {
    animation: slide-up 0.5s ease-out;
}

@keyframes slide-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

/* 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 rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spinner-rotate 0.6s linear infinite;
}

/* Overlay Loader */
.overlay-loader {
    position: fixed;
    inset: 0;
    background: rgba(8, 9, 12, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: overlay-fade-in 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes overlay-fade-in {
    from {
        opacity: 0;
        backdrop-filter: blur(0px);
    }

    to {
        opacity: 1;
        backdrop-filter: blur(12px);
    }
}

.overlay-loader-content {
    text-align: center;
    padding: 2rem;
    border-radius: 2rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.overlay-loader-content .spinner {
    margin-bottom: 1.5rem;
    border-width: 3px;
    border-top-color: var(--accent);
    width: 60px;
    height: 60px;
}

.overlay-loader-content p {
    font-weight: 600;
    letter-spacing: -0.01em;
    color: white;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .toast-container {
        right: 10px;
        left: 10px;
    }

    .toast {
        min-width: auto;
        max-width: none;
    }
}