:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --bg-dark: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: rgba(255, 255, 255, 0.1);
    --success: #10b981;
    --error: #ef4444;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Background Blobs */
.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: move 20s infinite alternate;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: var(--primary);
    top: -100px;
    right: -100px;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: #ec4899;
    bottom: -100px;
    left: -100px;
    animation-delay: -5s;
}

@keyframes move {
    from { transform: translate(0, 0); }
    to { transform: translate(100px, 100px); }
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 4rem 2rem;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 4rem;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    margin-bottom: 1rem;
}

.hero h1 span {
    background: linear-gradient(to right, var(--primary), #ec4899);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* Upload Section */
.upload-section {
    flex: 1;
}

.drop-zone {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 2px dashed var(--border);
    border-radius: 24px;
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.drop-zone:hover, .drop-zone.drag-over {
    border-color: var(--primary);
    background: rgba(30, 41, 59, 0.9);
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.upload-icon {
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.drop-zone h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.drop-zone p {
    color: var(--text-muted);
}

/* Upload List */
.upload-list {
    margin-top: 3rem;
    display: grid;
    gap: 1rem;
}

.upload-item {
    background: var(--card-bg);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    animation: slideUp 0.4s ease-out;
}

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

.preview-img {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    object-fit: cover;
    background: #1e293b;
}

.item-info {
    flex: 1;
    min-width: 0;
}

.item-info h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.progress-bar {
    height: 6px;
    background: #334155;
    border-radius: 3px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: var(--primary);
    width: 0%;
    transition: width 0.3s ease;
}

.url-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.url-input {
    flex: 1;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    color: var(--success);
    font-size: 0.875rem;
    font-family: monospace;
    outline: none;
}

.copy-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.875rem;
    transition: background 0.2s;
}

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

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

footer {
    margin-top: auto;
    padding-top: 4rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

@media (max-width: 640px) {
    .hero h1 { font-size: 2.5rem; }
    .container { padding: 2rem 1rem; }
    .upload-item { flex-direction: column; align-items: stretch; text-align: center; }
    .preview-img { margin: 0 auto; }
}