:root {
    --background: #fff;
    --foreground: #0a0a0a;
    --accents-1: #fafafa;
    --accents-2: #eaeaea;
    --accents-3: #999;
    --accents-5: #666;
    --radius: 8px;
    --font-sans: "Geist", -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --brand: #000;
}

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background-color: var(--background);
    color: var(--foreground);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    padding: 24px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: 480px;
}

.card {
    background: var(--background);
    border: 1px solid var(--accents-2);
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0 4px 24px -8px rgba(0,0,0,0.05);
    text-align: center;
}

h1 { 
    margin: 0 0 12px 0; 
    font-size: 24px; 
    font-weight: 600; 
    letter-spacing: -0.04em; 
    color: var(--foreground);
}

p { 
    margin: 0 0 32px 0;
    color: var(--accents-5); 
    line-height: 1.6; 
    font-size: 14px; 
}

.drop-zone {
    position: relative;
    background-color: var(--background);
    border: 1px dashed var(--accents-2);
    border-radius: var(--radius);
    padding: 48px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: border-color 0.2s ease, background-color 0.2s ease;
    outline: none;
}

.drop-zone:hover, .drop-zone.drag-active {
    border-color: var(--brand);
    background-color: var(--accents-1);
}

.drop-zone input[type=file] {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.drop-zone-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 16px;
    color: var(--accents-3);
    transition: color 0.2s ease;
}

.drop-zone:hover .drop-zone-icon, .drop-zone.drag-active .drop-zone-icon {
    color: var(--brand);
}

.drop-zone-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--foreground);
    margin-bottom: 4px;
}

.drop-zone-desc {
    font-size: 13px;
    color: var(--accents-5);
}

.status-container {
    margin-top: 24px;
    min-height: 24px;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease;
    opacity: 0;
}

.status-container.visible {
    opacity: 1;
}

.status-loading { color: var(--accents-5); }
.status-success { color: #0070f3; }
.status-error { color: #e00; }

.footer {
    margin-top: 32px;
    font-size: 12px;
    color: var(--accents-3);
    text-align: center;
}