:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --radius: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
body { background-color: var(--bg-color); color: var(--text-main); display: flex; justify-content: center; align-items: center; min-height: 100vh; padding: 20px; }
.container { background-color: var(--card-bg); width: 100%; max-width: 450px; padding: 30px; border-radius: var(--radius); 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: 25px; }
h1 { font-size: 1.5rem; font-weight: 700; margin-bottom: 5px; }
.subtitle { color: var(--text-muted); font-size: 0.9rem; }

.service-toggle { display: flex; background-color: var(--bg-color); border-radius: 8px; padding: 4px; margin: 20px 0; border: 1px solid var(--border-color); }
.service-toggle label { flex: 1; text-align: center; padding: 10px; cursor: pointer; border-radius: 6px; font-weight: 500; font-size: 0.9rem; transition: background-color 0.2s; }
.service-toggle input[type="radio"] { display: none; }
.service-toggle input[type="radio"]:checked + span { background-color: var(--card-bg); box-shadow: 0 1px 3px rgba(0,0,0,0.1); color: var(--primary); display: block; width: 100%; height: 100%; padding: 10px; border-radius: 6px; margin: -10px; }

.form-group { margin-bottom: 20px; }
label.section-label { display: block; font-weight: 600; margin-bottom: 8px; font-size: 0.95rem; }
select, input[type="number"] { width: 100%; padding: 12px; border: 1px solid var(--border-color); border-radius: 8px; font-size: 1rem; background-color: var(--card-bg); }
select:focus, input[type="number"]:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1); }

.drop-zone { border: 2px dashed var(--border-color); border-radius: var(--radius); padding: 40px 20px; text-align: center; cursor: pointer; margin-bottom: 15px; background-color: var(--bg-color); }
.drop-zone:hover { border-color: var(--primary); background-color: rgba(37, 99, 235, 0.02); }
.drop-zone p { color: var(--text-muted); margin-bottom: 0; font-size: 1rem; }
.drop-zone p.icon { font-size: 2rem; margin-bottom: 10px; }

#file-list { list-style: none; margin-bottom: 20px; }
#file-list li { background-color: var(--bg-color); padding: 10px 15px; border-radius: 6px; margin-bottom: 8px; font-size: 0.9rem; display: flex; border: 1px solid var(--border-color); }
#file-list li::before { content: '📄'; margin-right: 10px; }

.config-options { background-color: var(--bg-color); padding: 20px; border-radius: var(--radius); margin-bottom: 25px; border: 1px solid var(--border-color); }
.radio-group { display: flex; gap: 15px; margin-bottom: 15px; }
.radio-group label { display: flex; align-items: center; cursor: pointer; font-size: 0.95rem; }
.radio-group input[type="radio"] { margin-right: 8px; cursor: pointer; }

.primary-btn { background-color: var(--primary); color: white; border: none; border-radius: 8px; padding: 14px 20px; width: 100%; font-size: 1rem; font-weight: 600; cursor: pointer; transition: background-color 0.2s; }
.primary-btn:hover { background-color: var(--primary-hover); }
.primary-btn:disabled { background-color: #93c5fd; cursor: not-allowed; }

#success-section { text-align: center; padding: 20px 0; }
#success-section h2 { color: #16a34a; margin-bottom: 10px; }
#order-number { font-size: 2.5rem; letter-spacing: 2px; margin: 20px 0; color: var(--primary); background-color: var(--bg-color); padding: 15px; border-radius: var(--radius); border: 1px dashed var(--border-color); }