:root {
    --bg: #0d1117;
    --fg: #adbac7;
    --accent: #4493f8;
    --border: #30363d;
    --success: #3fb950;
    --header-white: #f0f6fc;
}

body {
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, system-ui, sans-serif;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 20px;
}

.header {
    margin-bottom: 30px;
    border-left: 3px solid var(--accent);
    padding-left: 16px;
}

.upload-area {
    border: 2px dashed var(--border);
    border-radius: 12px;
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    background: #161b22;
    transition: 0.2s;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--accent);
    background: #1c2128;
}

.progress-bar {
    height: 6px;
    background: var(--border);
    border-radius: 10px;
    margin: 25px 0;
    overflow: hidden;
    display: none;
}

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

.copy-box {
    display: flex;
    margin-top: 20px;
    gap: 8px;
}

input[type="text"] {
    flex: 1;
    background: #0d1117;
    border: 1px solid var(--border);
    color: var(--success);
    padding: 12px;
    border-radius: 6px;
    font-family: monospace;
    outline: none;
}

button {
    background: var(--accent);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
}

.reset-btn {
    background: transparent;
    color: var(--fg);
    text-decoration: underline;
    margin-top: 20px;
    border: none;
    cursor: pointer;
    opacity: 0.7;
}

.dim {
    color: #768390;
    font-size: 13px;
}

.error-text {
    color: #f85149;
    margin-bottom: 10px;
}