:root {
    --background: #0c0c0c;
    --foreground: #ffffff;
    --card: #0c0c0c;
    --card-foreground: #ffffff;
    --primary: #ffffff;
    --primary-foreground: #0c0c0c;
    --secondary: #ffffff;
    --secondary-foreground: #0c0c0c;
    --muted: #ffffff;
    --muted-foreground: #ffffff;
    --accent: #ffffff;
    --accent-foreground: #0c0c0c;
    --border: #ffffff;
    --radius: 12px;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
    --success-color: rgba(16, 185, 129, 0.2);
    --error-color: rgba(239, 68, 68, 0.2);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--background);
    color: var(--foreground);
    line-height: 1.7;
    min-height: 100vh;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

header {
    background: var(--card);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.5), 0 1px 2px rgba(0, 0, 0, 0.3);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) 0;
}

.logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: -0.02em;
}

.hero {
    background: var(--background);
    padding: 6rem 0 5rem;
    text-align: center;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(255, 255, 255, 0.02) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(255, 255, 255, 0.02) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-family: 'Inter', sans-serif;
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--foreground);
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.hero p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
}

.upload-section {
    padding: 3rem 0 5rem;
}

.upload-area {
    background: rgba(255, 255, 255, 0.02);
    border: 2px dashed rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    padding: 5rem var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    backdrop-filter: blur(20px);
    box-shadow: 
        0 1px 3px rgba(0, 0, 0, 0.3),
        0 4px 12px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
    max-width: 800px;
    margin: 0 auto;
}

.upload-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.upload-area:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.04);
    box-shadow: 
        0 4px 12px rgba(0, 0, 0, 0.4),
        0 8px 32px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.upload-area:hover::before {
    opacity: 1;
}

.upload-area.dragover {
    border-color: rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.06);
    transform: scale(1.02);
}

.upload-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-xl);
    color: var(--foreground);
    opacity: 0.8;
}

.upload-content h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--foreground);
    font-weight: 600;
}

.upload-content p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-xs);
    font-size: 1rem;
}

.file-info {
    font-size: 0.875rem;
    margin-top: var(--spacing-lg);
    opacity: 0.6;
    font-family: 'JetBrains Mono', monospace;
}

.upload-progress {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    padding: var(--spacing-2xl);
    margin: var(--spacing-xl) auto;
    max-width: 800px;
    backdrop-filter: blur(20px);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.progress-fill {
    height: 100%;
    background: var(--foreground);
    width: 0%;
    transition: width var(--transition-fast);
    border-radius: 4px;
}

.progress-text {
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

.result-area {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    padding: var(--spacing-2xl);
    margin: var(--spacing-xl) auto;
    max-width: 800px;
    animation: slideIn var(--transition-normal) ease;
    backdrop-filter: blur(20px);
    box-shadow: 
        0 1px 3px rgba(0, 0, 0, 0.3),
        0 4px 12px rgba(0, 0, 0, 0.15);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-header h3 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--foreground);
    font-size: 1.5rem;
    font-weight: 600;
}

.image-preview {
    margin-bottom: var(--spacing-xl);
    border-radius: var(--radius);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.02);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.image-preview img {
    max-width: 100%;
    max-height: 400px;
    object-fit: contain;
    border-radius: var(--radius);
}

.url-section {
    margin-top: var(--spacing-xl);
}

.url-section label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    font-weight: 500;
}

.url-input-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.url-input-group input {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--foreground);
    font-size: 0.95rem;
    font-family: 'JetBrains Mono', monospace;
    outline: none;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.url-input-group input:focus {
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.copy-btn {
    background: var(--foreground);
    color: var(--background);
    border: none;
    border-radius: var(--radius);
    padding: var(--spacing-md) var(--spacing-xl);
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-normal);
    box-shadow: 
        0 2px 8px rgba(255, 255, 255, 0.15),
        0 1px 3px rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
    font-size: 0.95rem;
}

.copy-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.1), transparent);
    transition: left var(--transition-slow);
}

.copy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 4px 16px rgba(255, 255, 255, 0.2),
        0 2px 8px rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.95);
}

.copy-btn:hover::before {
    left: 100%;
}

.copy-btn:active {
    transform: translateY(0);
}

.copy-btn.copied {
    background: var(--success-color);
    color: var(--foreground);
}

.copy-btn svg {
    width: 18px;
    height: 18px;
}

.new-upload-btn {
    width: 100%;
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.1);
    color: var(--foreground);
    border-radius: var(--radius);
    padding: var(--spacing-md);
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-normal);
    font-size: 0.95rem;
}

.new-upload-btn:hover {
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.05);
}

.error-message {
    background: var(--error-color);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius);
    padding: var(--spacing-lg) var(--spacing-xl);
    color: rgba(239, 68, 68, 1);
    text-align: center;
    margin: var(--spacing-xl) auto;
    max-width: 800px;
    backdrop-filter: blur(20px);
}

footer {
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 4rem 0 3rem;
    margin-top: 5rem;
    backdrop-filter: blur(20px);
}

.footer-content {
    text-align: center;
}

.footer-title {
    font-family: 'Inter', sans-serif;
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--foreground);
    letter-spacing: -0.02em;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-2xl);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    font-size: 1rem;
    line-height: 1.6;
}

html {
    scroll-behavior: smooth;
}

*:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.5);
    outline-offset: 2px;
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    .hero {
        padding: 4rem 0 3rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .upload-area {
        padding: 3rem var(--spacing-lg);
    }
    
    .url-input-group {
        flex-direction: column;
    }
    
    .copy-btn {
        width: 100%;
        justify-content: center;
    }
}