:root {
  --bg-primary: #f5f6f8;
  --bg-card: #ffffff;
  --border: #e2e5ea;
  --border-hover: #3b82f6;
  --text-dark: #1a1d23;
  --text-mid: #4b5563;
  --text-light: #6b7280;
  --text-muted: #9ca3af;
  --blue: #3b82f6;
  --cyan: #0891b2;
  --green: #059669;
  --amber: #d97706;
  --red: #dc2626;
  --purple: #7c3aed;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 4px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
}
* { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family:'Noto Sans KR',sans-serif;
  background:var(--bg-primary);
  color:var(--text-dark);
  font-size:14px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
body::before {
  content:''; position:fixed; inset:0; pointer-events:none; z-index:0;
  background-image: linear-gradient(rgba(0,0,0,.02) 1px,transparent 1px), linear-gradient(90deg,rgba(0,0,0,.02) 1px,transparent 1px);
  background-size:60px 60px;
}
.app { position:relative; z-index:1; max-width:1400px; margin:0 auto; padding:24px 24px 80px; }

/* ── HEADER ── */
.header {
  display:flex; align-items:center; justify-content:space-between;
  margin-bottom:20px; padding-bottom:20px; border-bottom:1px solid var(--border);
}
.header-left { display:flex; align-items:center; gap:14px; }
.header-icon {
  width:48px; height:48px; border-radius:12px;
  background:linear-gradient(135deg,#3b82f6,#1d4ed8);
  display:flex; align-items:center; justify-content:center;
  font-size:22px; color:#fff;
}
.header h1 { font-size:22px; font-weight:800; letter-spacing:-0.5px; }
.header .sub { font-size:12px; color:var(--text-light); font-family:'JetBrains Mono',monospace; margin-top:2px; }
.header-actions { display:flex; gap:8px; }
.btn {
  padding:8px 18px; border:1px solid var(--border); border-radius:var(--radius-sm);
  background:#fff; color:var(--text-mid); font-size:13px; font-weight:600;
  cursor:pointer; font-family:'Noto Sans KR',sans-serif;
  display:flex; align-items:center; gap:6px; transition:all .2s;
}
.btn:hover { border-color:var(--blue); color:var(--blue); }
.btn-primary { background:var(--blue); color:#fff; border-color:var(--blue); }
.btn-primary:hover { background:#2563eb; }
.btn-green { background:var(--green); color:#fff; border-color:var(--green); }
.btn-green:hover { background:#047857; }
.btn-red { background:var(--red); color:#fff; border-color:var(--red); }
.btn-sm { padding:6px 12px; font-size:12px; }

/* ── STEP NAV ── */
.step-nav {
  display:flex; gap:4px; margin-bottom:20px; background:#fff;
  border:1px solid var(--border); border-radius:10px; padding:4px;
}
.step-btn {
  flex:1; padding:10px 16px; border:none; border-radius:7px;
  font-size:13px; font-weight:600; cursor:pointer;
  font-family:'Noto Sans KR',sans-serif; background:transparent;
  color:var(--text-light); display:flex; align-items:center;
  justify-content:center; gap:8px; transition:all .2s;
}
.step-btn:hover { background:#f3f4f6; color:var(--text-mid); }
.step-btn.active { background:var(--blue); color:#fff; box-shadow:0 2px 8px rgba(59,130,246,.25); }
.step-btn.completed { color:var(--green); }
.step-btn .step-num {
  width:24px; height:24px; border-radius:50%; background:rgba(0,0,0,.08);
  display:flex; align-items:center; justify-content:center;
  font-size:11px; font-weight:700; font-family:'JetBrains Mono',monospace;
}
.step-btn.active .step-num { background:rgba(255,255,255,.25); color:#fff; }
.step-btn.completed .step-num { background:var(--green); color:#fff; }

/* ── LAYOUT ── */
.main-layout { display:grid; grid-template-columns:1fr 340px; gap:20px; }
@media(max-width:1024px) {
  .main-layout { grid-template-columns:1fr; }
  .sidebar { order:-1; }
}

/* ── PANELS ── */
.panel {
  background:#fff; border:1px solid var(--border); border-radius:var(--radius);
  box-shadow:var(--shadow); overflow:hidden;
}
.panel-header {
  padding:16px 20px; border-bottom:1px solid var(--border);
  display:flex; align-items:center; gap:10px;
}
.panel-header h2 { font-size:15px; font-weight:700; }
.panel-header .badge {
  font-size:11px; padding:3px 10px; border-radius:12px; font-weight:600;
  font-family:'JetBrains Mono',monospace;
}
.panel-body { padding:20px; }
.step-panel { display:none; }
.step-panel.active { display:block; }

/* ── FORM ── */
.form-group { margin-bottom:16px; }
.form-group label {
  display:block; font-size:12px; font-weight:600; color:var(--text-light);
  margin-bottom:6px; text-transform:uppercase; letter-spacing:.5px;
}
.form-group label .req { color:var(--red); margin-left:2px; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:12px; }
.form-row-3 { display:grid; grid-template-columns:1fr 1fr 1fr; gap:12px; }
input[type="text"], input[type="number"], select, textarea {
  width:100%; padding:9px 14px; border:1px solid var(--border);
  border-radius:var(--radius-sm); font-size:14px; font-weight:500;
  font-family:'Noto Sans KR',sans-serif; transition:border-color .2s;
  background:#fff; color:var(--text-dark);
}
input:focus, select:focus, textarea:focus { outline:none; border-color:var(--blue); }
input[type="number"] { font-family:'JetBrains Mono',monospace; }
.input-with-unit {
  position:relative; display:flex; align-items:center;
}
.input-with-unit input { padding-right:45px; }
.input-unit {
  position:absolute; right:12px; font-size:12px; color:var(--text-muted);
  font-weight:600; pointer-events:none;
}

/* ── RADIO / TOGGLE ── */
.radio-group { display:flex; gap:6px; flex-wrap:wrap; }
.radio-btn {
  padding:8px 16px; border:1px solid var(--border); border-radius:var(--radius-sm);
  font-size:13px; font-weight:600; cursor:pointer; transition:all .2s;
  background:#fff; color:var(--text-mid);
}
.radio-btn:hover { border-color:var(--blue); }
.radio-btn.active { background:rgba(59,130,246,.08); border-color:var(--blue); color:var(--blue); }
.radio-btn input { display:none; }

.toggle-group { display:flex; background:#f3f4f6; border-radius:var(--radius-sm); padding:3px; }
.toggle-btn {
  flex:1; padding:8px 16px; border:none; border-radius:6px;
  font-size:13px; font-weight:600; cursor:pointer;
  font-family:'Noto Sans KR',sans-serif; background:transparent;
  color:var(--text-light); transition:all .2s;
}
.toggle-btn.active { background:#fff; color:var(--text-dark); box-shadow:0 1px 3px rgba(0,0,0,.1); }

/* ── SIDEBAR ── */
.sidebar { position:sticky; top:24px; height:fit-content; }
.sidebar .panel { border-left:3px solid var(--blue); }
.summary-row {
  display:flex; justify-content:space-between; align-items:center;
  padding:8px 0; border-bottom:1px solid #f3f4f6;
}
.summary-row:last-child { border-bottom:none; }
.summary-row .label { font-size:13px; color:var(--text-mid); }
.summary-row .value {
  font-size:14px; font-weight:700; font-family:'JetBrains Mono',monospace;
  color:var(--text-dark);
}
.summary-total {
  display:flex; justify-content:space-between; align-items:center;
  padding:14px 0; margin-top:8px; border-top:2px solid var(--text-dark);
}
.summary-total .label { font-size:15px; font-weight:800; }
.summary-total .value {
  font-size:20px; font-weight:800; color:var(--blue);
  font-family:'JetBrains Mono',monospace;
}
.summary-unit {
  display:flex; justify-content:space-between; align-items:center;
  padding:10px 14px; background:rgba(59,130,246,.05); border-radius:var(--radius-sm);
  margin-top:12px;
}
.summary-unit .label { font-size:13px; font-weight:600; color:var(--blue); }
.summary-unit .value { font-size:16px; font-weight:800; color:var(--blue); font-family:'JetBrains Mono',monospace; }
.exchange-info {
  display:flex; align-items:center; gap:8px; padding:10px 14px;
  background:#f9fafb; border-radius:var(--radius-sm); margin-bottom:12px;
}
.exchange-info .dot { width:8px; height:8px; border-radius:50%; background:var(--green); }
.exchange-info span { font-size:12px; color:var(--text-mid); font-weight:500; }
.exchange-info strong { font-family:'JetBrains Mono',monospace; font-weight:700; }

/* ── CHART ── */
.chart-container { margin-top:16px; position:relative; height:200px; }

/* ── TABLE (운임 관리) ── */
.data-table { width:100%; border-collapse:collapse; font-size:13px; }
.data-table th {
  text-align:left; padding:10px 12px; background:#f9fafb;
  border-bottom:1px solid var(--border); font-weight:600;
  color:var(--text-light); font-size:11px; text-transform:uppercase;
  letter-spacing:.5px;
}
.data-table td {
  padding:10px 12px; border-bottom:1px solid #f3f4f6;
  font-family:'JetBrains Mono',monospace; font-size:12px;
}
.data-table tr:hover td { background:#f9fafb; }

/* ── RESULT ── */
.result-grid { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
@media(max-width:768px) { .result-grid { grid-template-columns:1fr; } }
.result-card {
  background:#f9fafb; border:1px solid var(--border); border-radius:var(--radius-sm);
  padding:20px;
}
.result-card h3 { font-size:14px; font-weight:700; margin-bottom:14px; }
.cost-item {
  display:flex; justify-content:space-between; align-items:center;
  padding:6px 0;
}
.cost-item .name { font-size:13px; color:var(--text-mid); display:flex; align-items:center; gap:8px; }
.cost-item .name .idx {
  width:20px; height:20px; border-radius:50%; background:var(--blue);
  color:#fff; font-size:10px; font-weight:700;
  display:flex; align-items:center; justify-content:center;
  font-family:'JetBrains Mono',monospace;
}
.cost-item .amount { font-family:'JetBrains Mono',monospace; font-weight:600; }
.cost-item .pct { font-size:11px; color:var(--text-muted); margin-left:8px; font-family:'JetBrains Mono',monospace; }
.cost-total {
  display:flex; justify-content:space-between; align-items:center;
  padding:12px 0; margin-top:8px; border-top:2px solid var(--text-dark);
  font-weight:800;
}
.cost-total .amount { font-size:18px; color:var(--blue); font-family:'JetBrains Mono',monospace; }
.margin-input { display:flex; align-items:center; gap:12px; margin-bottom:16px; }
.margin-slider { flex:1; -webkit-appearance:none; height:6px; border-radius:3px; background:#e5e7eb; outline:none; }
.margin-slider::-webkit-slider-thumb { -webkit-appearance:none; width:20px; height:20px; border-radius:50%; background:var(--blue); cursor:pointer; }
.margin-value { font-size:20px; font-weight:800; color:var(--blue); font-family:'JetBrains Mono',monospace; min-width:60px; text-align:right; }
.price-display {
  text-align:center; padding:20px; background:rgba(59,130,246,.05);
  border-radius:var(--radius-sm);
}
.price-display .label { font-size:12px; color:var(--text-light); margin-bottom:4px; }
.price-display .price { font-size:28px; font-weight:800; color:var(--blue); font-family:'JetBrains Mono',monospace; }
.price-display .sub { font-size:12px; color:var(--text-muted); margin-top:4px; }

/* ── SHIPPING MANAGE PANEL ── */
.shipping-manage { margin-top:16px; }
.shipping-manage-toggle {
  width:100%; padding:10px; border:1px dashed var(--border);
  border-radius:var(--radius-sm); background:#f9fafb;
  color:var(--text-light); font-size:13px; font-weight:600; cursor:pointer;
  font-family:'Noto Sans KR',sans-serif; transition:all .2s;
}
.shipping-manage-toggle:hover { border-color:var(--blue); color:var(--blue); }
.shipping-manage-content { display:none; margin-top:12px; }
.shipping-manage-content.open { display:block; }

/* ── TARIFF RESULT ── */
.tariff-result {
  padding:16px; background:#f9fafb; border:1px solid var(--border);
  border-radius:var(--radius-sm); margin-top:12px;
}
.tariff-result .item { font-size:13px; padding:4px 0; display:flex; justify-content:space-between; }
.tariff-result .item .label { color:var(--text-mid); }
.tariff-result .item .val { font-weight:700; font-family:'JetBrains Mono',monospace; }

/* ── FOOTER ── */
.footer {
  margin-top:24px; padding:14px 20px; background:#fff;
  border:1px solid var(--border); border-radius:var(--radius);
  display:flex; justify-content:space-between; align-items:center;
  font-size:12px; color:var(--text-muted);
}
.footer strong { color:var(--text-mid); }

/* ── MODAL ── */
.modal-overlay {
  display:none; position:fixed; inset:0; background:rgba(0,0,0,.4);
  z-index:1000; align-items:center; justify-content:center;
}
.modal-overlay.open { display:flex; }
.modal {
  background:#fff; border-radius:var(--radius); padding:24px;
  max-width:600px; width:90%; max-height:80vh; overflow-y:auto;
  box-shadow:0 20px 60px rgba(0,0,0,.2);
}
.modal h3 { font-size:16px; font-weight:700; margin-bottom:16px; }

/* ── LOADING ── */
.loading { display:inline-flex; align-items:center; gap:8px; color:var(--text-light); font-size:13px; }
.loading .spinner {
  width:16px; height:16px; border:2px solid #e5e7eb;
  border-top-color:var(--blue); border-radius:50%;
  animation:spin .6s linear infinite;
}
@keyframes spin { to { transform:rotate(360deg); } }

/* ── TOAST ── */
.toast {
  position:fixed; bottom:24px; right:24px; padding:12px 20px;
  background:var(--text-dark); color:#fff; border-radius:var(--radius-sm);
  font-size:13px; font-weight:600; z-index:2000;
  transform:translateY(100px); opacity:0; transition:all .3s;
}
.toast.show { transform:translateY(0); opacity:1; }

/* ── NAV BUTTONS ── */
.nav-buttons { display:flex; justify-content:space-between; margin-top:24px; padding-top:16px; border-top:1px solid var(--border); }

/* ── EXPORT ── */
.export-bar { display:flex; gap:8px; justify-content:center; margin-top:24px; }

/* ── PHOTO UPLOAD ── */
.photo-upload {
  width:110px; height:110px; position:relative; cursor:pointer;
}
.photo-preview {
  width:100%; height:100%; border:2px dashed var(--border); border-radius:var(--radius-sm);
  display:flex; align-items:center; justify-content:center; overflow:hidden;
  transition:border-color .2s; background:#f9fafb;
}
.photo-upload:hover .photo-preview { border-color:var(--blue); }
.photo-placeholder {
  display:flex; flex-direction:column; align-items:center; gap:4px;
  color:var(--text-muted); font-size:11px; font-weight:500;
}
.photo-preview img {
  width:100%; height:100%; object-fit:cover; border-radius:6px;
}
.photo-remove-btn {
  position:absolute; top:-6px; right:-6px; width:22px; height:22px;
  border-radius:50%; background:var(--red); color:#fff; border:2px solid #fff;
  font-size:11px; font-weight:700; cursor:pointer; display:flex;
  align-items:center; justify-content:center; line-height:1;
}

/* ── CATEGORY CUSTOM ── */
.category-wrap { position:relative; }
.category-custom {
  display:flex; gap:6px; margin-top:6px;
}
.category-custom input { flex:1; }

/* ── REFERENCE PANEL ── */
.ref-panel { margin-top:16px; }
.ref-panel-toggle {
  width:100%; padding:10px; border:1px dashed var(--border);
  border-radius:var(--radius-sm); background:#f9fafb;
  color:var(--text-light); font-size:13px; font-weight:600; cursor:pointer;
  font-family:'Noto Sans KR',sans-serif; transition:all .2s;
}
.ref-panel-toggle:hover { border-color:var(--blue); color:var(--blue); }
.ref-panel-content { display:none; margin-top:12px; }
.ref-panel-content.open { display:block; }
.ref-item {
  padding:10px 14px; background:#fff; border:1px solid var(--border);
  border-radius:var(--radius-sm); margin-bottom:8px;
}
.ref-title {
  font-size:13px; font-weight:700; color:var(--text-dark); margin-bottom:4px;
}
.ref-body {
  font-size:12px; color:var(--text-mid); line-height:1.6;
}
.ref-tag {
  display:inline-block; padding:1px 6px; border-radius:4px;
  background:rgba(59,130,246,.1); color:var(--blue);
  font-size:10px; font-weight:700; margin-right:4px; vertical-align:middle;
}
.ref-tag-real {
  background:rgba(5,150,105,.1); color:var(--green);
}
.ref-note {
  font-size:11px; color:var(--text-muted); margin-top:8px; line-height:1.5;
  font-style:italic;
}

/* ── ANIMATION ── */
.fade-in { animation:fadeIn .3s ease; }
@keyframes fadeIn { from { opacity:0; transform:translateY(8px); } to { opacity:1; transform:translateY(0); } }