:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-color: #f8fafc;
    --container-bg: #ffffff;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --success-color: #22c55e;
    --drop-zone-bg: #eff6ff;
    --drop-zone-border: #3b82f6;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    padding: 2rem 1rem;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--container-bg);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

header {
    text-align: center;
    margin-bottom: 2.5rem;
}

header h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

header p {
    color: var(--text-muted);
}

.settings {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: #f1f5f9;
    border-radius: 0.75rem;
}

.quality-control {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.quality-control label {
    font-weight: 600;
}

.quality-control input[type="range"] {
    width: 100%;
    cursor: pointer;
}

.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 1rem;
    padding: 3rem 2rem;
    text-align: center;
    transition: all 0.2s ease;
    cursor: pointer;
    background-color: #ffffff;
}

.drop-zone:hover, .drop-zone.drag-over {
    border-color: var(--drop-zone-border);
    background-color: var(--drop-zone-bg);
}

.drop-zone-content svg {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.drop-zone-content p {
    font-size: 1.1rem;
    color: var(--text-muted);
}

.drop-zone-content p span {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: underline;
}

.results-container {
    margin-top: 3rem;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.results-header h2 {
    font-size: 1.25rem;
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.8rem;
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: all 0.2s;
}

.btn-secondary:hover {
    background-color: #f1f5f9;
    color: var(--text-color);
}

.results-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.result-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    background-color: #fff;
}

.result-preview {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 0.375rem;
    border: 1px solid var(--border-color);
}

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

.result-name {
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: block;
}

.result-meta {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.download-btn {
    background-color: var(--success-color);
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    transition: opacity 0.2s;
}

.download-btn:hover {
    opacity: 0.9;
}

footer {
    margin-top: 3rem;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-muted);
}

@media (max-width: 640px) {
    .result-item {
        flex-direction: column;
        text-align: center;
    }
    .result-info {
        width: 100%;
    }
}