:root{
  --brand:#2C8C9E;          /* 틸블루 — 신뢰/비교 */
  --brand-dark:#1B5E6E;
  --brand-tint:#E4F1F3;
  --bg:#F3F6F6;
  --surface:#FFFFFF;
  --line:#E2E8E8;
  --line-soft:#EEF2F2;
  --text:#1E2A2C;
  --text-sub:#647072;
  --ok:#2E7D52;             /* 최저가 */
  --ok-tint:#E6F3EB;
  --warn:#C2761A;           /* 경고/하락 */
  --warn-tint:#FBEFDD;
  --radius:14px;
  --radius-sm:10px;
  --shadow-sm:0 1px 2px rgba(30,42,44,.05), 0 1px 1px rgba(30,42,44,.04);
  --shadow:0 6px 20px rgba(30,42,44,.07), 0 2px 6px rgba(30,42,44,.05);
  --shadow-lg:0 14px 34px rgba(30,42,44,.10), 0 4px 10px rgba(30,42,44,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none !important}
html,body{height:100%}
body{font-family:Pretendard,system-ui,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-size:16px;line-height:1.6}
.num{font-variant-numeric:tabular-nums}
button{font-family:inherit}
input,select,textarea{font-family:inherit}
code{background:var(--brand-tint);color:var(--brand-dark);padding:1px 6px;border-radius:6px;font-size:.9em}

/* ── 버튼 ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;font-size:15px;font-weight:600;padding:11px 18px;border-radius:11px;cursor:pointer;border:1px solid var(--line);background:var(--surface);color:var(--text);box-shadow:var(--shadow-sm);transition:filter .12s,background .12s}
.btn svg{width:17px;height:17px}
.btn:hover{background:#FAFCFC}
.btn.primary{border:none;color:#fff;background:linear-gradient(180deg,#3FA0B2 0%, var(--brand) 50%, var(--brand-dark) 100%);box-shadow:var(--shadow), inset 0 1px 1px rgba(255,255,255,.35)}
.btn.primary:hover{filter:brightness(1.06)}
.btn.ghost{background:transparent;box-shadow:none}
.btn.ghost:hover{background:var(--brand-tint)}
.btn.sm{padding:8px 13px;font-size:13.5px;border-radius:9px}
.btn.lg{font-size:17px;padding:14px 32px;border-radius:13px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.linkbtn{background:none;border:none;color:var(--brand-dark);font-weight:600;cursor:pointer;font-size:inherit;padding:0;text-decoration:underline}

/* ── 헤더 ── */
.topnav{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 20px;background:rgba(255,255,255,.86);backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:11px}
.mascot{width:38px;height:38px;border-radius:11px;background:radial-gradient(120% 120% at 30% 25%, #5FB4C4 0%, var(--brand) 55%, var(--brand-dark) 100%);box-shadow:var(--shadow-sm), inset 0 1px 1px rgba(255,255,255,.5);display:flex;align-items:center;justify-content:center;color:#fff}
.mascot svg{width:20px;height:20px}
.brand b{font-weight:700;font-size:17px;display:block;line-height:1.1}
.brand small{color:var(--text-sub);font-size:11.5px;font-weight:500}
.topnav-actions{display:flex;align-items:center;gap:7px;flex-wrap:wrap;justify-content:flex-end}
.storebadge{font-size:12px;font-weight:600;color:var(--brand-dark);background:var(--brand-tint);padding:6px 10px;border-radius:999px;white-space:nowrap}
.storebadge.persist{color:#fff;background:var(--ok)}

.wrap{max-width:1280px;margin:0 auto;padding:24px 20px 64px}

/* ════════ 랜딩 ════════ */
.landing{max-width:920px;margin:6px auto 0}
.lp-hero{text-align:center;padding:10px 0 22px}
.lp-eyebrow{display:inline-block;color:var(--brand-dark);background:var(--brand-tint);font-size:12px;font-weight:700;letter-spacing:.1em;padding:6px 13px;border-radius:999px;margin-bottom:14px}
.lp-hero h1{font-size:31px;font-weight:800;letter-spacing:-.5px;line-height:1.3}
.lp-hero p{max-width:640px;margin:13px auto 0;color:var(--text-sub);font-size:16px;line-height:1.62}
.lp-hero p b{color:var(--brand-dark)}
.lp-feats{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:18px}
.lp-feat{font-size:13.5px;font-weight:600;color:var(--brand-dark);background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:7px 14px;box-shadow:var(--shadow-sm)}
.lp-pcnote{max-width:680px;margin:0 auto 16px;background:var(--brand-tint);border:1px solid var(--line);border-radius:12px;padding:12px 16px;font-size:14px;color:var(--brand-dark);line-height:1.5;text-align:center}

.lp-startcard{background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow-lg);padding:22px 24px 24px}
.lp-start-h{text-align:center;font-size:14.5px;color:var(--text-sub);margin-bottom:16px}
.lp-start-h b{color:var(--brand-dark)}
.ind-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.ind{display:flex;flex-direction:column;align-items:flex-start;gap:3px;text-align:left;padding:16px 17px;border:2px solid var(--line);border-radius:14px;background:var(--surface);cursor:pointer;transition:border-color .12s,background .12s,transform .08s}
.ind:hover{border-color:var(--brand);background:#FBFDFD;transform:translateY(-1px)}
.ind .em{font-size:25px;margin-bottom:3px}
.ind b{font-size:15.5px}
.ind small{color:var(--text-sub);font-size:12.5px}
.lp-cta{text-align:center;margin-top:18px}

/* ════════ 보드 ════════ */
.board{display:none}
.board.on{display:block}
.board-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.board-title{font-size:20px;font-weight:800;letter-spacing:-.3px}
.board-title small{font-size:13px;font-weight:500;color:var(--text-sub);margin-left:7px}
.board-top .spacer{flex:1}

.cat-tabs{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:14px}
.cat-tab{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:600;padding:8px 12px;border-radius:9px;border:1px solid var(--line);background:var(--surface);color:var(--text-sub);cursor:pointer;white-space:nowrap}
.cat-tab:hover{border-color:var(--brand)}
.cat-tab.on{background:var(--brand-tint);color:var(--brand-dark);border-color:var(--brand)}
.cat-tab .num{font-size:12px;opacity:.65}
.cat-tab .cat-edit,.cat-tab .cat-del{display:inline-flex;width:18px;height:18px;align-items:center;justify-content:center;border-radius:5px;color:var(--brand-dark)}
.cat-tab .cat-edit{font-size:12px}
.cat-tab .cat-del{font-size:15px;line-height:1}
.cat-tab .cat-edit:hover{background:#fff}
.cat-tab .cat-del:hover{background:#fff;color:var(--warn)}
.cat-add{font-size:13px;font-weight:600;padding:8px 12px;border-radius:9px;border:1.5px dashed var(--line);background:transparent;color:var(--text-sub);cursor:pointer;white-space:nowrap}
.cat-add:hover{border-color:var(--brand);color:var(--brand-dark)}

/* 거래처 칩줄 */
.sup-row{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-bottom:14px;padding:13px 15px;background:var(--surface);border:1px solid var(--line);border-radius:13px}
.sup-row .lbl{font-size:13px;color:var(--text-sub);font-weight:600}
.sup-chip{display:inline-flex;align-items:center;gap:7px;padding:8px 12px;border-radius:10px;border:1px solid var(--line);background:#FBFDFD;font-size:14px;font-weight:600}
.sup-chip input{border:none;background:transparent;font-size:14px;font-weight:600;width:80px;color:var(--text)}
.sup-chip input:focus{outline:none}
.sup-chip .cfg{cursor:pointer;color:var(--text-sub);display:inline-flex}
.sup-chip .cfg:hover{color:var(--brand-dark)}
.sup-chip .del{cursor:pointer;color:var(--text-sub);font-size:16px;line-height:1;display:inline-flex}
.sup-chip .del:hover{color:var(--warn)}
.sup-add{padding:8px 12px;border-radius:10px;border:1.5px dashed var(--line);background:transparent;color:var(--text-sub);font-size:13.5px;font-weight:600;cursor:pointer}
.sup-add:hover{border-color:var(--brand);color:var(--brand-dark)}

/* 비교 표 */
.legend{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:12.5px;color:var(--text-sub);margin-bottom:8px}
.legend .pill{display:inline-flex;align-items:center;gap:4px;padding:2px 9px;border-radius:999px;background:var(--ok-tint);color:var(--ok);font-weight:600}

.board-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:13px;background:var(--surface)}
table.cmp{width:100%;border-collapse:collapse;min-width:680px}
table.cmp th,table.cmp td{padding:10px 12px;border-bottom:1px solid var(--line-soft);text-align:left;vertical-align:top}
table.cmp thead th{background:#FAFCFC;font-size:12.5px;font-weight:600;color:var(--text-sub);position:sticky;top:0;z-index:1}
table.cmp .col-item{width:170px;min-width:150px}
table.cmp .col-qty{width:96px}
.it-name{font-size:14.5px;font-weight:600}
.it-sub{font-size:11.5px;color:var(--text-sub);margin-top:2px}
.it-del{margin-top:5px;font-size:11.5px;color:var(--text-sub);cursor:pointer}
.it-del:hover{color:var(--warn)}
.qty-input{width:74px;border:1.5px solid var(--line);border-radius:8px;padding:7px 8px;font-size:13.5px;text-align:right}
.qty-input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint)}

/* 셀 = 거래처×품목 입력 */
.cell{min-width:188px}
.cell .row1{display:flex;gap:5px;align-items:center}
.cell input.price{width:74px;border:1.5px solid var(--line);border-radius:8px;padding:7px 8px;font-size:13.5px;text-align:right}
.cell select.unit{border:1.5px solid var(--line);border-radius:8px;padding:7px 6px;font-size:12.5px;background:#fff;width:66px}
.cell .row2.packhint{color:var(--text-sub)}
.cell .row2.packhint b{color:var(--brand-dark);font-weight:600}
.cell input.qpu{width:46px;border:1.5px solid var(--line);border-radius:8px;padding:7px 6px;font-size:12.5px;text-align:right}
.cell input.yld{width:46px;border:1.5px solid var(--brand);border-radius:8px;padding:7px 6px;font-size:12.5px;text-align:center}
.cell input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint)}
.cell .row2{display:flex;align-items:center;gap:6px;margin-top:5px;flex-wrap:wrap}
.cell .lblmini{font-size:10.5px;color:var(--text-sub)}
.cell .helperbtn{cursor:pointer;display:inline-flex;align-items:center;gap:3px;font-size:11.5px;font-weight:600;color:var(--brand-dark);background:var(--brand-tint);border:1px solid var(--line);border-radius:7px;padding:5px 9px;white-space:nowrap;font-family:inherit}
.cell .helperbtn:hover{border-color:var(--brand)}
.cell .ediblecost{font-size:12px;color:var(--text-sub);margin-top:6px}
.cell .ediblecost b{color:var(--text);font-weight:700}
.cell.best{background:var(--ok-tint)}
.cell.best .ediblecost b{color:var(--ok)}
.cell .besttag{display:inline-flex;align-items:center;gap:3px;font-size:11px;font-weight:700;color:var(--ok);margin-top:4px}
.cell .avgnote{font-size:11px;color:var(--brand-dark);margin-top:4px;cursor:pointer}
.cell .avgnote:hover{text-decoration:underline}

/* 요약 카드 */
.summary{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:11px;margin-top:16px}
.scard{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:13px 15px}
.scard .lab{font-size:12.5px;color:var(--text-sub)}
.scard .val{font-size:21px;font-weight:800;margin-top:3px;letter-spacing:-.3px}
.scard .sub{font-size:11.5px;color:var(--text-sub);margin-top:2px}
.scard.win{background:var(--ok-tint);border-color:#BFE0CC}
.scard.win .lab,.scard.win .val,.scard.win .sub{color:var(--ok)}

/* 협상 카드 띠 */
.dealbar{display:flex;align-items:center;gap:10px;margin-top:14px;padding:12px 15px;border:1px solid var(--brand);border-radius:12px;background:var(--brand-tint)}
.dealbar .ico{color:var(--brand-dark);display:inline-flex}
.dealbar .txt{font-size:13.5px;color:var(--brand-dark);line-height:1.45}
.dealbar .txt b{font-weight:700}

/* ════════ 모달 공통 ════════ */
.modal-bg{position:fixed;inset:0;background:rgba(20,30,32,.46);display:flex;align-items:center;justify-content:center;padding:18px;z-index:60}
.modal{background:var(--surface);border-radius:18px;box-shadow:var(--shadow-lg);max-width:460px;width:100%;max-height:90vh;overflow:auto}
.modal-h{display:flex;align-items:center;justify-content:space-between;padding:18px 22px 12px}
.modal-h h3{font-size:18px;font-weight:700}
.modal-x{background:none;border:none;font-size:22px;color:var(--text-sub);cursor:pointer;line-height:1}
.modal-body{padding:6px 22px 22px}
.bk-card{border:1px solid var(--line);border-radius:13px;padding:15px 16px;margin-top:12px}
.bk-card-h{font-size:14.5px;font-weight:700;margin-bottom:7px;display:flex;align-items:center;gap:8px}
.bk-card p{font-size:13px;color:var(--text-sub);line-height:1.5;margin-bottom:11px}
.bk-badge{font-size:11px;font-weight:700;padding:2px 9px;border-radius:999px;background:var(--line);color:var(--text-sub)}
.bk-badge.ok{background:var(--ok-tint);color:var(--ok)}
.bk-badge.no{background:var(--warn-tint);color:var(--warn)}
.bk-status{font-size:12px;color:var(--text-sub);margin-top:9px;line-height:1.45}
.modal-body input[type=file]{font-size:13px}

/* 수율 도우미 / 거래처 설정 폼 */
.fld{display:flex;flex-direction:column;gap:6px;margin-top:12px}
.fld>span{font-size:13px;font-weight:600;color:var(--text-sub)}
.fld input{border:1.5px solid var(--line);border-radius:10px;padding:11px 12px;font-size:15px;color:var(--text);background:var(--surface);width:100%}
.fld input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint)}
.yh-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:14px}
.yh-row .arrow{color:var(--text-sub)}
.yh-in{width:78px;border:1.5px solid var(--line);border-radius:9px;padding:9px 10px;font-size:15px;text-align:right}
.yh-in:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint)}
.yh-result{font-size:20px;font-weight:800;color:var(--brand-dark);padding:0 4px}
.yh-actions{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}
.hist-list{margin-top:14px;border-top:1px solid var(--line-soft);padding-top:12px}
.hist-h{font-size:13px;font-weight:700;color:var(--text-sub);margin-bottom:8px}
.hist-row{display:grid;grid-template-columns:1.1fr 1fr 1fr .8fr;gap:8px;font-size:13px;padding:6px 2px;border-bottom:1px solid var(--line-soft)}
.hist-row.head{color:var(--text-sub);font-size:12px;border-bottom:1px solid var(--line)}
.hist-row .r{text-align:right}
.hist-empty{font-size:12.5px;color:var(--text-sub);padding:6px 0}

/* 토스트 */
.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);background:var(--text);color:#fff;font-size:14px;font-weight:600;padding:12px 20px;border-radius:12px;box-shadow:var(--shadow-lg);z-index:80}

/* 푸터 */
.foot{max-width:1280px;margin:0 auto;padding:26px 20px 40px;color:var(--text-sub);font-size:12.5px;text-align:center;line-height:1.7;border-top:1px solid var(--line)}
.foot b{color:var(--brand-dark)}
.foot a{color:var(--brand-dark);text-decoration:none}
.foot a:hover{text-decoration:underline}

@media (max-width:640px){
  .lp-hero h1{font-size:25px}
  .board-title{font-size:18px}
  .wrap{padding:18px 14px 50px}
}