* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    margin-bottom: 3rem;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-content > div:first-child {
    text-align: center;
    flex: 1;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary-color), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.header-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.user-info {
    background: var(--card-bg);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
}

.user-info-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.user-name {
    font-weight: 600;
    font-size: 0.875rem;
}

.user-storage {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Upload Methods */
.upload-methods {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.method-btn {
    flex: 1;
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-secondary);
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.method-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.method-btn.active {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
}

/* Upload Section */
.upload-section {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.drop-zone {
    border: 3px dashed var(--border-color);
    border-radius: 1rem;
    padding: 3rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    background: var(--bg-color);
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--primary-color);
    background: rgba(79, 70, 229, 0.05);
}

.drop-zone-content {
    pointer-events: none;
}

.upload-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1rem;
    color: var(--primary-color);
}

.drop-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.drop-subtext {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.chunked-zone {
    text-align: center;
    padding: 3rem;
}

/* Upload Progress */
.upload-progress {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--bg-color);
    border-radius: 0.5rem;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.progress-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: 1rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #7c3aed);
    transition: width 0.3s ease;
    width: 0%;
}

/* Upload Queue */
.upload-queue {
    margin-top: 1.5rem;
}

.queue-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-color);
    border-radius: 0.5rem;
    margin-bottom: 0.5rem;
}

.queue-item-icon {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 0.25rem;
}

.queue-item-info {
    flex: 1;
}

.queue-item-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.queue-item-size {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.queue-item-status {
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.queue-item-status.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.queue-item-status.error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

/* Gallery Section */
.gallery-section {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.gallery-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.gallery-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.gallery-item {
    background: var(--bg-color);
    border-radius: 0.75rem;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.gallery-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.gallery-item-preview {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--border-color);
}

.gallery-item-info {
    padding: 1rem;
}

.gallery-item-name {
    font-weight: 600;
    margin-bottom: 0.5rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.gallery-item-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.gallery-item-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.gallery-item-actions button {
    flex: 1;
    padding: 0.5rem;
    border: none;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-view {
    background: var(--primary-color);
    color: white;
}

.btn-view:hover {
    background: var(--primary-hover);
}

.btn-delete {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.btn-delete:hover {
    background: var(--danger-color);
    color: white;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn svg {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: #475569;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--card-bg);
    margin: 5% auto;
    padding: 2rem;
    border-radius: 1rem;
    max-width: 800px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    float: right;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-secondary);
    cursor: pointer;
}

.close:hover {
    color: var(--text-primary);
}

.modal-content h3 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.url-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.url-container label {
    font-weight: 600;
    display: block;
    color: var(--text-primary);
}

.url-container > div {
    display: flex;
    gap: 0.5rem;
}

.url-container input {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 0.9rem;
    word-break: break-all;
}

.file-preview {
    margin-top: 1.5rem;
    text-align: center;
    max-width: 100%;
    overflow: hidden;
}

.file-preview img,
.file-preview video {
    max-width: 100%;
    max-height: 60vh;
    width: auto;
    height: auto;
    border-radius: 0.5rem;
    object-fit: contain;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    background: var(--text-primary);
    color: white;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(150%);
    transition: transform 0.3s ease;
    z-index: 2000;
}

.toast.show {
    transform: translateY(0);
}

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

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

/* Loading State */
.loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.loading::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .header-content > div:first-child {
        text-align: center;
    }

    header h1 {
        font-size: 2rem;
    }

    .gallery {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1rem;
    }

    .upload-methods {
        flex-direction: column;
    }

    .modal-content {
        margin: 5% 1rem;
        padding: 1.5rem;
        width: calc(100% - 2rem);
        max-height: 90vh;
    }
    
    .url-container input {
        font-size: 0.8rem;
    }
    
    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
}