.tool-container {
            max-width: 900px;
            margin: 0 auto;
            padding: 20px;
        }
.section-box {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
            margin-bottom: 24px;
        }
.radio-group {
            display: flex;
            gap: 20px;
            margin-top: 10px;
            flex-wrap: wrap;
        }
.radio-item {
            display: flex;
            align-items: center;
        }
.radio-item input {
            margin-right: 8px;
        }
#drop-zone {
            border: 2px dashed var(--border-color);
            border-radius: 12px;
            padding: 40px;
            text-align: center;
            cursor: pointer;
            background: var(--bg-color);
            transition: all 0.2s;
        }
#drop-zone:hover {
            border-color: var(--primary-color);
        }
#drop-zone.bg-active {
            border-color: var(--primary-color);
            background: var(--hover-bg);
        }
textarea {
            width: 100%;
            height: 300px;
            padding: 16px;
            background: var(--card-bg);
            color: var(--text-color);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            margin-top: 10px;
            font-family: var(--f-mono);
            resize: vertical;
        }
.btn-primary {
            background: var(--primary-color);
            color: var(--accent-ink);
            padding: 10px 20px;
            border-radius: 8px;
            border: none;
            font-weight: 600;
            cursor: pointer;
        }
.btn-primary:hover {
            opacity: 0.9;
        }
.btn-primary:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }
.success-msg {
            color: var(--ok);
            margin-top: 8px;
            font-weight: 500;
        }
.hidden {
            display: none;
        }
h2 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
label {
            font-weight: 600;
        }
.drop-icon {
            width: 64px;
            height: 64px;
            color: var(--text-color);
            opacity: 0.5;
        }