:root{
  --bg:#f3f4f6;--card:#fff;--text:#111827;--muted:#6b7280;--line:#e5e7eb;
  --black:#050505;--accent:#2563eb;--danger:#ef4444;--soft:#eef2f7;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans KR",Arial,sans-serif;
  color-scheme:light;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:var(--bg);color:var(--text)}
body{padding:env(safe-area-inset-top) 0 env(safe-area-inset-bottom)}
button,input,select{font:inherit}
button{cursor:pointer}
.app-shell{width:min(100%,760px);margin:0 auto;min-height:100vh;background:var(--bg)}
.sticky-top{position:sticky;top:0;z-index:40;background:#000;box-shadow:0 1px 0 rgba(255,255,255,.08)}
.app-header{display:flex;align-items:center;gap:12px;padding:16px 16px 10px;background:#000;color:#fff}
.brand-logo{width:54px;height:54px;border-radius:12px;object-fit:cover;flex:none}
.brand-copy{min-width:0;flex:1}.brand-copy h1{font-size:23px;line-height:1.05;margin:0;font-weight:900;letter-spacing:-.04em}.brand-copy p{margin:5px 0 0;font-size:12px;color:#cbd5e1}
.header-actions{display:flex;align-items:center;gap:6px;flex:none}.install-btn,.update-btn{border:1px solid #525252;background:#171717;color:#fff;border-radius:9px;padding:8px 9px;font-size:11px;font-weight:800;white-space:nowrap}.update-btn{background:#fff;color:#111;border-color:#fff}.update-btn:disabled{opacity:.65;cursor:wait}.hidden{display:none!important}
.tabs{display:grid;grid-template-columns:1fr 1fr;gap:6px;padding:7px 12px 8px;background:#000}
.tab-btn{border:0;border-radius:12px;padding:12px 8px;font-weight:800;background:#252525;color:#a3a3a3}.tab-btn.active{background:#fff;color:#000}
main{padding:12px}.screen{display:none}.screen.active{display:block}
.section-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:16px;margin-bottom:12px;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.search-card{padding-bottom:12px}.field-label{display:block;font-size:12px;font-weight:800;color:#374151;margin:0 0 7px}.search-wrap{display:flex;gap:8px;position:relative}.search-wrap input{padding-right:42px}
input,select{width:100%;height:44px;border:1px solid #d1d5db;border-radius:12px;background:#fff;color:#111827;padding:0 12px;outline:none}input:focus,select:focus{border-color:#111827;box-shadow:0 0 0 3px rgba(17,24,39,.08)}
.icon-btn{position:absolute;right:4px;top:4px;width:36px;height:36px;border:0;background:transparent;color:#9ca3af;font-size:24px}
.recent-area{margin-top:13px}.mini-title{font-size:11px;color:#6b7280;font-weight:700;margin-bottom:7px}.chip-row{display:flex;gap:7px;overflow-x:auto;padding-bottom:2px;scrollbar-width:none}.chip-row::-webkit-scrollbar{display:none}.chip{border:1px solid #d1d5db;background:#fff;border-radius:999px;padding:7px 10px;font-size:12px;white-space:nowrap;color:#374151}
.search-results{margin-top:8px;display:grid;gap:6px}.search-item{display:flex;align-items:center;justify-content:space-between;width:100%;border:0;background:#f8fafc;border-radius:11px;padding:11px 12px;text-align:left;color:#111827}.search-item strong{font-size:14px}.search-item span{color:#9ca3af}
.product-title-row,.section-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:14px}.eyebrow{font-size:11px;color:#6b7280;font-weight:800;margin-bottom:3px}.product-title-row h2,.section-heading h2{margin:0;font-size:20px;line-height:1.25;letter-spacing:-.035em}.text-btn{border:0;background:#eef2f7;color:#374151;padding:8px 10px;border-radius:9px;font-size:12px;font-weight:700}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:10px}.compact-grid{margin-top:12px}.qty-label{margin-top:14px}.qty-strip{display:flex;gap:7px;overflow-x:auto;padding:1px 1px 5px;scrollbar-width:none}.qty-strip::-webkit-scrollbar{display:none}.qty-btn{min-width:64px;border:1px solid #d1d5db;background:#fff;border-radius:10px;padding:9px 10px;font-size:12px;font-weight:800;white-space:nowrap}.qty-btn.active{background:#111827;color:#fff;border-color:#111827}
.option-area{display:grid;gap:9px;margin-top:12px}.option-section{border-top:1px solid var(--line);padding-top:12px}.option-title{font-size:12px;font-weight:900;margin:0 0 7px}.option-select{height:42px}
.price-result-card{background:#111827;color:#fff;border-radius:16px;padding:15px;margin-top:14px}.result-topline{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:#d1d5db}.vat-note{font-size:11px}.price-breakdown{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:12px}.price-breakdown div{background:#1f2937;border-radius:11px;padding:10px}.price-breakdown span{display:block;color:#9ca3af;font-size:11px}.price-breakdown strong{display:block;margin-top:4px;font-size:15px}.total-row{display:flex;justify-content:space-between;align-items:end;border-top:1px solid #374151;margin-top:12px;padding-top:12px}.total-row span{font-weight:700}.total-value{display:flex;align-items:baseline;justify-content:flex-end;gap:7px;flex-wrap:wrap;text-align:right}.total-row strong{font-size:26px;color:#fff;letter-spacing:-.04em}.total-value small{font-size:12px;color:#cbd5e1;font-weight:700}.composite-breakdown{font-size:11px;color:#cbd5e1;margin-top:8px}
.primary-btn{width:100%;height:46px;border:0;border-radius:13px;background:#2563eb;color:#fff;font-weight:900;margin-top:10px}.primary-btn:active{transform:translateY(1px)}
.empty-state{text-align:center;padding:48px 16px;color:#6b7280}.empty-state .empty-icon{font-size:36px;color:#9ca3af}.empty-state strong{display:block;color:#374151;margin-top:8px}.empty-state span{display:block;font-size:12px;margin-top:5px}
.preset-row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:7px}.preset-btn{height:42px;border:1px solid #d1d5db;background:#fff;border-radius:11px;font-size:12px;font-weight:800}.preset-btn.active{background:#111827;color:#fff;border-color:#111827}.unit-input{position:relative}.unit-input input{padding-right:40px}.unit-input span{position:absolute;right:11px;top:50%;transform:translateY(-50%);font-size:11px;color:#9ca3af}
.switch-row{display:flex;align-items:center;gap:12px;margin-top:14px;border-top:1px solid var(--line);padding-top:14px}.switch-row>span:first-child{flex:1}.switch-row strong{display:block;font-size:13px}.switch-row small{display:block;color:#6b7280;font-size:10px;margin-top:3px;line-height:1.35}.switch-row input{display:none}.switch{width:46px;height:26px;border-radius:999px;background:#d1d5db;position:relative;flex:none;transition:.2s}.switch:after{content:"";position:absolute;width:20px;height:20px;border-radius:50%;background:#fff;top:3px;left:3px;box-shadow:0 1px 3px rgba(0,0,0,.25);transition:.2s}.switch-row input:checked+.switch{background:#2563eb}.switch-row input:checked+.switch:after{left:23px}
.layout-result-card{background:#000;color:#fff;border-radius:20px;padding:17px;margin-bottom:12px}.status-badge{background:#262626;border-radius:999px;padding:5px 8px;font-size:10px;color:#d4d4d4}.layout-total{display:flex;justify-content:space-between;align-items:end;margin:18px 0}.layout-total span{font-size:14px;font-weight:700}.layout-total strong{font-size:21px}.layout-total b{font-size:48px;line-height:.8;margin-right:3px;color:#fff}.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.detail-item{background:#171717;border-radius:11px;padding:10px}.detail-item span{display:block;font-size:10px;color:#a3a3a3}.detail-item strong{display:block;font-size:13px;margin-top:4px}.primary-btn.inverse{background:#fff;color:#000}
.toast{position:fixed;left:50%;bottom:calc(18px + env(safe-area-inset-bottom));transform:translate(-50%,20px);background:#111827;color:#fff;border-radius:999px;padding:10px 14px;font-size:12px;font-weight:700;opacity:0;pointer-events:none;transition:.2s;z-index:100}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(min-width:640px){.app-shell{border-left:1px solid #e5e7eb;border-right:1px solid #e5e7eb}.search-results{grid-template-columns:1fr 1fr}}
@media(max-width:380px){.brand-copy h1{font-size:21px}.two-col{gap:7px}.preset-btn{font-size:11px}.section-card{padding:14px}.layout-total b{font-size:42px}}

.custom-price-card{padding:0;overflow:hidden}
.custom-price-card summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:15px 16px;cursor:pointer;font-size:14px;font-weight:900}
.custom-price-card summary::-webkit-details-marker{display:none}
.custom-price-card summary:after{content:"＋";font-size:18px;color:#6b7280;margin-left:auto}
.custom-price-card[open] summary:after{content:"−"}
.custom-price-card summary small{font-size:10px;color:#6b7280;font-weight:700;margin-left:auto}
.custom-price-body{border-top:1px solid var(--line);padding:14px 16px 16px}
.custom-layout-link{display:flex;align-items:center;justify-content:space-between;background:#f8fafc;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
.custom-layout-link span{font-size:12px;color:#6b7280;font-weight:700}.custom-layout-link strong{font-size:14px}.custom-layout-link b{font-size:22px;margin-right:2px}
.custom-input-grid{margin-top:12px}.custom-qty-strip{margin-bottom:10px}
.custom-price-result{background:#111827;color:#fff;border-radius:15px;padding:14px;margin-top:8px}
.custom-total-row{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-top:12px;border-top:1px solid #374151;padding-top:12px}.custom-total-row>span{font-weight:800}.custom-total-row strong{font-size:25px;letter-spacing:-.04em}.custom-price-result .total-value small{color:#cbd5e1}
@media(max-width:420px){.total-value{gap:3px}.total-row .total-value small,.custom-total-row .total-value small{width:100%;font-size:11px}.custom-price-card summary small{display:none}}

.piece-action-row{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:9px}
.secondary-action-btn{height:38px;border:1px solid #d1d5db;background:#fff;color:#374151;border-radius:10px;font-size:12px;font-weight:800}
.secondary-action-btn.active{background:#111827;color:#fff;border-color:#111827}
.reference-card{margin-top:12px;border:1px solid var(--line);border-radius:14px;padding:12px;background:#f8fafc}
.reference-heading,.reference-title-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:9px}
.reference-heading span{font-size:12px;font-weight:900;color:#111827}
.reference-heading small{font-size:10px;color:#6b7280;font-weight:700;text-align:right}
.reference-title-row strong{font-size:14px;line-height:1.3}
.compact-results{margin-top:7px}
.compact-results .search-item{background:#fff;border:1px solid #e5e7eb;padding:9px 10px}
.custom-ref-option{margin-top:10px}
.surcharge-preview{margin-top:11px}
.surcharge-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:7px}
.surcharge-head span{font-size:11px;font-weight:900;color:#374151}
.surcharge-head small{font-size:10px;color:#6b7280;font-weight:700}
.surcharge-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:5px}
.surcharge-grid>div{background:#fff;border:1px solid #e5e7eb;border-radius:9px;padding:7px 5px;text-align:center}
.surcharge-grid span{display:block;font-size:9px;color:#6b7280}
.surcharge-grid strong{display:block;margin-top:3px;font-size:11px;color:#111827;white-space:nowrap}
.reference-warning{font-size:11px;color:#b45309;background:#fff7ed;border:1px solid #fed7aa;border-radius:9px;padding:8px}
@media(max-width:380px){.surcharge-grid{grid-template-columns:1fr 1fr}.reference-heading{align-items:flex-start;flex-direction:column;gap:2px}.reference-heading small{text-align:left}}
.search-item.selected{background:#111827;color:#fff}
.search-item.selected span{color:#fff}
.surcharge-grid{grid-template-columns:repeat(4,minmax(92px,1fr));overflow-x:auto;padding-bottom:3px;scrollbar-width:none}
.surcharge-grid::-webkit-scrollbar{display:none}
.custom-qty-strip .qty-btn{min-width:max-content}

.money-basis-note{margin-top:12px;font-size:11px;color:#6b7280;font-weight:700}

.manual-option-wrap{margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
.manual-option-wrap .field-label{display:flex;align-items:center;gap:6px}
.inline-hint{font-size:10px;font-weight:800;color:#6b7280}

@media(max-width:520px){.surcharge-head{align-items:flex-start;flex-direction:column;gap:3px}.surcharge-head small{text-align:left;line-height:1.35}}


.mobile-direct-tier-card{margin:0 12px 2px;border:1px solid #404040;border-radius:12px;background:#fff;color:#111827;overflow:hidden}
.mobile-direct-tier-card summary{list-style:none;display:flex;align-items:center;gap:8px;min-height:38px;padding:9px 12px;font-size:13px;font-weight:900;cursor:pointer}
.mobile-direct-tier-card summary::-webkit-details-marker{display:none}
.mobile-direct-tier-card summary small{margin-left:auto;color:#6b7280;font-size:10px;font-weight:700}
.mobile-direct-tier-card summary:after{content:'＋';color:#6b7280;font-size:16px;margin-left:3px}
.mobile-direct-tier-card[open] summary:after{content:'−'}
.mobile-direct-tier-body{border-top:1px solid #e5e7eb;padding:10px 12px 11px}
.mobile-direct-inputs{gap:7px}
.mobile-direct-inputs input{height:36px;border-radius:9px;font-size:12px;padding:0 9px}
.mobile-direct-label{display:block;margin:0 0 4px;font-size:10px;color:#6b7280;font-weight:800}
.mobile-direct-tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:5px;margin-top:8px}
.mobile-direct-tier-grid>div{min-width:0;background:#f1f5f9;border-radius:8px;padding:6px 4px;text-align:center}
.mobile-direct-tier-grid span{display:block;color:#6b7280;font-size:9px}
.mobile-direct-tier-grid strong{display:block;min-height:14px;margin-top:2px;font-size:11px;color:#111827;white-space:nowrap}
.reference-summary-line{margin-top:9px;text-align:right;color:#6b7280;font-size:10px;font-weight:700;line-height:1.4}
.reference-summary-line strong{color:#111827;font-weight:900}
@media(max-width:380px){.mobile-direct-tier-card summary small{display:none}.mobile-direct-tier-grid{grid-template-columns:repeat(3,1fr)}}

@media(max-width:390px){.app-header{gap:8px;padding-left:12px;padding-right:12px}.brand-logo{width:48px;height:48px}.header-actions{gap:4px}.install-btn,.update-btn{padding:7px 7px;font-size:10px}}