:root {
  --sb-primary:#1B4DFF; --sb-primary-dark:#0F33CC; --sb-primary-light:#EEF2FF;
  --sb-accent:#FF6B2B;
  --sb-dark:#0D0F1A;
  --sb-gray-100:#F7F8FA; --sb-gray-200:#ECEEF2; --sb-gray-400:#9CA3AF;
  --sb-gray-600:#4B5563; --sb-gray-800:#1F2937;
  --sb-success:#059669; --sb-success-light:#ECFDF5;
  --sb-danger:#DC2626; --sb-danger-light:#FEF2F2;
  --sb-font:'Noto Sans KR',sans-serif;
  --sb-radius:12px; --sb-radius-lg:20px;
  --sb-shadow:0 2px 16px rgba(0,0,0,0.08);
}
*{box-sizing:border-box;}
body{font-family:var(--sb-font);color:var(--sb-gray-800);background:var(--sb-gray-100);line-height:1.7;}
.page-header{background:linear-gradient(135deg,var(--sb-dark) 0%,#1a2a6c 100%);color:#fff;padding:48px 0 44px;}
.page-header .badge-top{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,0.1);border:1px solid rgba(255,255,255,0.2);border-radius:999px;padding:6px 14px;font-size:14px;font-weight:700;margin-bottom:16px;}
.page-header h1{font-size:clamp(22px,4vw,36px);font-weight:800;letter-spacing:-0.5px;margin-bottom:10px;}
.page-header p{color:rgba(255,255,255,0.65);font-size:15px;margin:0;max-width:480px;}
.steps-bar{display:flex;gap:0;margin-bottom:32px;}
.step-item{flex:1;text-align:center;position:relative;}
.step-item::after{content:'';position:absolute;top:20px;left:50%;width:100%;height:2px;background:var(--sb-gray-200);z-index:0;}
.step-item:last-child::after{display:none;}
.step-circle{width:40px;height:40px;border-radius:50%;border:2px solid var(--sb-gray-200);background:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:var(--sb-gray-400);margin:0 auto 6px;position:relative;z-index:1;}
.step-item.active .step-circle{background:var(--sb-primary);border-color:var(--sb-primary);color:#fff;}
.step-item.done .step-circle{background:var(--sb-success);border-color:var(--sb-success);color:#fff;}
.step-item.done::after{background:var(--sb-success);}
.step-item.active::after{background:var(--sb-primary);}
.step-label{font-size:14px;color:var(--sb-gray-400);}
.step-item.active .step-label{color:var(--sb-primary);font-weight:700;}
.step-item.done .step-label{color:var(--sb-success);}
.form-card{background:#fff;border-radius:var(--sb-radius-lg);border:1px solid var(--sb-gray-200);padding:32px;margin-bottom:24px;}
.form-section-title{font-size:15px;font-weight:800;color:var(--sb-dark);margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--sb-gray-200);display:flex;align-items:center;gap:8px;}
.form-section-title .step-badge{background:var(--sb-primary);color:#fff;border-radius:6px;padding:2px 10px;font-size:14px;}
.form-label-sb{font-size:14px;font-weight:700;color:var(--sb-gray-800);margin-bottom:6px;display:block;}
.form-label-sb .req{color:var(--sb-accent);}
.form-control-sb{width:100%;padding:11px 14px;border:1.5px solid var(--sb-gray-200);border-radius:var(--sb-radius);font-size:14px;font-family:var(--sb-font);transition:border-color 0.2s,box-shadow 0.2s;background:#fff;color:var(--sb-gray-800);}
.form-control-sb:focus{outline:none;border-color:var(--sb-primary);box-shadow:0 0 0 3px rgba(27,77,255,0.1);}
.form-control-sb.is-invalid{border-color:var(--sb-danger);}
.form-control-sb.is-invalid:focus{box-shadow:0 0 0 3px rgba(220,38,38,0.1);}
.invalid-msg{font-size:14px;color:var(--sb-danger);margin-top:5px;display:none;}
.form-control-sb.is-invalid + .invalid-msg{display:block;}
select.form-control-sb{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239CA3AF' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14L2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:32px;}
textarea.form-control-sb{min-height:100px;resize:vertical;}
.radio-group, .check-group{display:flex;gap:8px;flex-wrap:wrap;}
.radio-btn-label{display:flex;align-items:center;gap:6px;padding:8px 14px;border:1.5px solid var(--sb-gray-200);border-radius:8px;cursor:pointer;font-size:14px;font-weight:600;transition:border-color 0.15s,background 0.15s;user-select:none;}
.radio-btn-label:hover{border-color:var(--sb-primary);}
.radio-btn-label input{display:none;}
.radio-btn-label.selected{border-color:var(--sb-primary);background:var(--sb-primary-light);color:var(--sb-primary);}
.file-upload-zone{border:2px dashed var(--sb-gray-200);border-radius:var(--sb-radius);padding:28px 20px;text-align:center;cursor:pointer;transition:border-color 0.2s,background 0.2s;}
.file-upload-zone:hover,.file-upload-zone.dragover{border-color:var(--sb-primary);background:var(--sb-primary-light);}
.file-preview{background:var(--sb-gray-100);border-radius:8px;padding:12px 16px;display:flex;align-items:center;gap:10px;margin-top:10px;display:none;}
.file-preview .fname{font-size:14px;font-weight:600;flex:1;}
.file-preview .fsize{font-size:14px;color:var(--sb-gray-400);}
.file-preview .btn-remove{background:none;border:none;color:var(--sb-gray-400);cursor:pointer;font-size:16px;padding:0;}
.hp-field{display:none !important;}
.btn-submit{background:var(--sb-primary);color:#fff;border:none;border-radius:var(--sb-radius);padding:17px 36px;font-size:16px;font-weight:800;width:100%;cursor:pointer;transition:background 0.2s,transform 0.1s;letter-spacing:-0.2px;}
.btn-submit:hover{background:var(--sb-primary-dark);transform:translateY(-1px);}
.btn-submit:disabled{background:var(--sb-gray-400);cursor:not-allowed;transform:none;}
.btn-submit .spinner{display:none;width:18px;height:18px;border:2px solid rgba(255,255,255,0.4);border-top-color:#fff;border-radius:50%;animation:spin 0.8s linear infinite;vertical-align:-4px;}
.btn-submit.loading .spinner{display:inline-block;}
.btn-submit.loading .btn-text{display:none;}
@keyframes spin{to{transform:rotate(360deg);}}
.sidebar-card{background:#fff;border-radius:var(--sb-radius-lg);border:1px solid var(--sb-gray-200);padding:24px;margin-bottom:16px;}
.sidebar-card h3{font-size:15px;font-weight:800;margin-bottom:16px;}
.process-step{display:flex;gap:14px;align-items:flex-start;margin-bottom:16px;}
.process-step:last-child{margin-bottom:0;}
.process-num{min-width:28px;height:28px;background:var(--sb-primary-light);color:var(--sb-primary);border-radius:8px;font-size:14px;font-weight:800;display:flex;align-items:center;justify-content:center;}
.process-step h4{font-size:14px;font-weight:700;margin-bottom:2px;}
.process-step p{font-size:14px;color:var(--sb-gray-400);margin:0;}
.trust-item{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--sb-gray-600);padding:8px 0;border-bottom:1px solid var(--sb-gray-100);}
.trust-item:last-child{border-bottom:none;}
.trust-item i{color:var(--sb-success);font-size:15px;}
.smartboard-form-result{border-radius:var(--sb-radius);padding:12px 14px;font-size:14px;font-weight:600;margin-top:12px;}
.smartboard-form-result--info{background:var(--sb-primary-light);border:1px solid rgba(27,77,255,0.15);color:var(--sb-primary);}
.smartboard-form-result--success{background:var(--sb-success-light);border:1px solid rgba(5,150,105,0.15);color:var(--sb-success);}
.smartboard-form-result--error{background:var(--sb-danger-light);border:1px solid rgba(220,38,38,0.15);color:var(--sb-danger);}
#successView{display:none;background:#fff;border-radius:var(--sb-radius-lg);border:1px solid var(--sb-gray-200);padding:60px 40px;text-align:center;}
#successView i{font-size:56px;color:var(--sb-success);margin-bottom:16px;display:block;}
#successView h2{font-size:24px;font-weight:800;margin-bottom:10px;}
#successView p{color:var(--sb-gray-600);font-size:15px;margin-bottom:24px;}
#successView > div{background:var(--sb-gray-100);border-radius:var(--sb-radius);padding:20px 24px;max-width:360px;margin:0 auto 24px;text-align:left;}
#successView > div p:first-child{font-size:14px;color:var(--sb-gray-600);margin:0 0 4px;}
#successView > div p:last-child{font-size:14px;color:var(--sb-gray-600);margin:0;}
#successView a{color:var(--sb-primary);font-size:14px;font-weight:600;text-decoration:none;}

.form-section-title > span:last-child{font-size:14px;font-weight:500;color:var(--sb-gray-400);margin-left:6px;}
.file-upload-zone .bi-cloud-upload{font-size:32px;color:var(--sb-gray-400);margin-bottom:8px;display:block;}
.file-upload-zone p:first-of-type{font-size:14px;font-weight:700;margin-bottom:4px;}
.file-upload-zone p:last-of-type{font-size:14px;color:var(--sb-gray-400);margin:0;}
#sampleFile{display:none;}
.file-preview .bi-file-earmark-spreadsheet{color:var(--sb-success);font-size:20px;}
#msgCount{font-size:14px;color:var(--sb-gray-400);text-align:right;margin-top:4px;}
#errorMsg{display:none;background:var(--sb-danger-light);border:1px solid rgba(220,38,38,0.2);border-radius:var(--sb-radius);padding:12px 16px;font-size:14px;color:var(--sb-danger);margin-bottom:16px;}
#contactResult{display:none;}
#contactForm > p:last-child{font-size:14px;color:var(--sb-gray-400);text-align:center;margin-top:12px;}
.sidebar-card:last-of-type{background:var(--sb-primary-light);border-color:rgba(27,77,255,0.15);}
.sidebar-card:last-of-type h3{color:var(--sb-primary);}
.sidebar-card:last-of-type p{font-size:14px;color:var(--sb-gray-600);margin:0;}