:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #10b981;
    --danger: #ef4444;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --border: #333333;
    --shadow: rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Login Styles */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 400px;
}

.login-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 20px 60px var(--shadow);
}

.logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.login-box h1 {
    font-size: 24px;
    margin-bottom: 8px;
    font-weight: 600;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 32px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group input {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 15px;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.btn-primary {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--accent), #2563eb);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

/* Navbar */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-left svg {
    color: var(--accent);
}

.nav-left h1 {
    font-size: 20px;
    font-weight: 600;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.image-count {
    color: var(--text-secondary);
    font-size: 14px;
    padding: 6px 12px;
    background: var(--bg-tertiary);
    border-radius: 20px;
}

.btn-logout {
    padding: 8px 16px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
}

.btn-logout:hover {
    background: var(--bg-tertiary);
    border-color: var(--danger);
    color: var(--danger);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 24px;
}

/* Upload Section */
.upload-section {
    margin-bottom: 40px;
}

.dropzone {
    background: var(--bg-secondary);
    border: 2px dashed var(--border);
    border-radius: 16px;
    padding: 60px 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.dropzone:hover {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.05);
}

.dropzone.drag-over {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.1);
    transform: scale(1.02);
}

.upload-icon {
    color: var(--accent);
    margin-bottom: 20px;
}

.dropzone h2 {
    font-size: 22px;
    margin-bottom: 8px;
}

.dropzone p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.btn-select {
    padding: 12px 32px;
    background: var(--accent);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-select:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

/* Progress */
.upload-progress {
    margin-top: 20px;
    text-align: center;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #8b5cf6);
    width: 0%;
    transition: width 0.3s ease;
    animation: progress-animation 1.5s ease-in-out infinite;
}

@keyframes progress-animation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.progress-text {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Actions Bar */
.actions-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.actions-bar h2 {
    font-size: 20px;
    font-weight: 600;
}

.actions-buttons {
    display: flex;
    gap: 12px;
}

.btn-secondary {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--accent);
    color: var(--accent);
}

/* Gallery */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.gallery-item {
    position: relative;
    background: var(--bg-secondary);
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 3/4;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid var(--border);
}

.gallery-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px var(--shadow);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 12px;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.btn-icon {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: white;
}

.btn-icon:hover {
    background: var(--accent);
    border-color: var(--accent);
    transform: scale(1.1);
}

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

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-secondary);
}

.empty-state svg {
    margin-bottom: 20px;
}

.empty-state p {
    font-size: 18px;
    margin-bottom: 8px;
}

.empty-subtitle {
    font-size: 14px;
    opacity: 0.7;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 16px 24px;
    border-radius: 12px;
    box-shadow: 0 20px 40px var(--shadow);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
    max-width: 400px;
}

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

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

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

/* Responsive */
@media (max-width: 768px) {
    .gallery {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 16px;
    }
    
    .actions-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .nav-content {
        padding: 0 16px;
    }
    
    .container {
        padding: 24px 16px;
    }
    
    .dropzone {
        padding: 40px 20px;
    }
}