/* ============================================================
   PeptideCO — Stack Builder v2 (Per-Peptide Supplier Selection)
   ============================================================ */

.stack-eyebrow{font-size:12px;font-weight:700;letter-spacing:2px;color:#2563eb;text-transform:uppercase;margin-bottom:10px;}
.stack-heading{font-size:34px;font-weight:800;color:#0f172a;margin-bottom:8px;}
.stack-sub{font-size:15px;color:#64748b;}

/* ── Recommended stack card ── */
.rec-stack-card{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:20px 24px;margin-bottom:14px;transition:border-color .15s,box-shadow .15s;}
.rec-stack-card:hover{border-color:#bfdbfe;box-shadow:0 2px 12px rgba(37,99,235,.08);}
.rec-stack-card.expanded{border-color:#2563eb;}
.rec-stack-name{font-size:15px;font-weight:700;color:#0f172a;margin-bottom:4px;}
.rec-stack-desc{font-size:13px;color:#64748b;margin-bottom:12px;}
.rec-stack-tags{display:flex;flex-wrap:wrap;gap:6px;}
.rec-stack-tag{font-size:12px;border:1px solid #e2e8f0;border-radius:20px;padding:3px 12px;color:#475569;}
.rec-stack-detail{display:none;margin-top:16px;padding-top:16px;border-top:1px solid #f1f5f9;font-size:13px;color:#475569;line-height:1.7;}

.btn-select-stack{background:#2563eb;color:#fff;border:none;padding:9px 18px;border-radius:7px;font-size:13px;font-weight:600;cursor:pointer;white-space:nowrap;transition:background .15s;}
.btn-select-stack:hover{background:#1d4ed8;}
.btn-chevron{background:none;border:1px solid #e2e8f0;border-radius:7px;width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#64748b;transition:background .15s,transform .2s;}
.btn-chevron:hover{background:#f1f5f9;}
.btn-chevron.open{transform:rotate(180deg);}

/* ── Supplier Selection Modal ── */
.ss-overlay{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:1040;display:flex;align-items:center;justify-content:center;padding:16px;opacity:0;pointer-events:none;transition:opacity .2s;}
.ss-overlay.open{opacity:1;pointer-events:all;}
.ss-modal{background:#fff;border-radius:16px;width:100%;max-width:700px;max-height:92vh;overflow-y:auto;box-shadow:0 24px 64px rgba(0,0,0,.22);transform:translateY(20px);transition:transform .25s;}
.ss-overlay.open .ss-modal{transform:translateY(0);}
.ss-modal::-webkit-scrollbar{width:4px;}
.ss-modal::-webkit-scrollbar-thumb{background:#e2e8f0;border-radius:2px;}

/* Modal header */
.ss-modal-header{padding:20px 24px 16px;border-bottom:1px solid #f1f5f9;position:sticky;top:0;background:#fff;z-index:10;}
.ss-modal-title{font-size:18px;font-weight:700;color:#0f172a;}
.ss-modal-subtitle{font-size:13px;color:#64748b;margin-top:3px;}
.ss-modal-close{background:rgba(0,0,0,.06);border:none;border-radius:8px;width:32px;height:32px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#64748b;font-size:16px;transition:background .15s;}
.ss-modal-close:hover{background:rgba(0,0,0,.12);}

/* Progress bar */
.ss-progress{display:flex;align-items:center;gap:0;padding:14px 24px;border-bottom:1px solid #f1f5f9;overflow-x:auto;}
.ss-prog-step{display:flex;align-items:center;gap:6px;flex-shrink:0;}
.ss-prog-num{width:24px;height:24px;border-radius:50%;font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;background:#f1f5f9;color:#94a3b8;transition:background .2s,color .2s;}
.ss-prog-num.active{background:#2563eb;color:#fff;}
.ss-prog-num.done{background:#10b981;color:#fff;}
.ss-prog-label{font-size:12px;color:#94a3b8;max-width:90px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.ss-prog-label.active{color:#2563eb;font-weight:600;}
.ss-prog-label.done{color:#10b981;}
.ss-prog-line{width:20px;height:2px;background:#e2e8f0;margin:0 4px;flex-shrink:0;}
.ss-prog-line.done{background:#10b981;}

/* Modal body */
.ss-modal-body{padding:20px 24px;}

/* Peptide heading in step */
.ss-pep-heading{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.ss-pep-num{width:28px;height:28px;border-radius:50%;background:#eff6ff;color:#2563eb;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.ss-pep-name{font-size:16px;font-weight:700;color:#0f172a;}
.ss-pep-cat{font-size:12px;color:#94a3b8;}

/* Supplier option row */
.ss-supplier-row{display:flex;align-items:center;gap:12px;border:2px solid #e2e8f0;border-radius:10px;padding:13px 16px;margin-bottom:8px;cursor:pointer;transition:border-color .15s,background .15s;position:relative;}
.ss-supplier-row:hover{border-color:#bfdbfe;background:#fafcff;}
.ss-supplier-row.selected{border-color:#2563eb;background:#eff6ff;}
.ss-supplier-row.out-of-stock{opacity:.5;cursor:not-allowed;}
.ss-sup-initial{width:38px;height:38px;border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;flex-shrink:0;}
.sc-0{background:#dbeafe;color:#1d4ed8;} .sc-1{background:#d1fae5;color:#065f46;} .sc-2{background:#fce7f3;color:#9d174d;} .sc-3{background:#fef3c7;color:#92400e;} .sc-4{background:#ede9fe;color:#5b21b6;} .sc-5{background:#fee2e2;color:#991b1b;} .sc-6{background:#cffafe;color:#0e7490;} .sc-7{background:#fef9c3;color:#854d0e;} .sc-8{background:#f0fdf4;color:#14532d;} .sc-9{background:#f5f3ff;color:#4c1d95;} .sc-10{background:#fff7ed;color:#9a3412;}
.ss-sup-info{flex:1;min-width:0;}
.ss-sup-name{font-size:14px;font-weight:700;color:#0f172a;}
.ss-sup-detail{font-size:12px;color:#64748b;margin-top:2px;}
.ss-sup-stock{font-size:11px;font-weight:700;margin-top:3px;}
.ss-sup-stock.in{color:#15803d;} .ss-sup-stock.low{color:#b45309;} .ss-sup-stock.out{color:#dc2626;}
.ss-sup-price{text-align:right;flex-shrink:0;}
.ss-sup-price-zar{font-size:17px;font-weight:800;color:#0f172a;}
.ss-sup-price-usd{font-size:11px;color:#94a3b8;margin-top:2px;}
.ss-sup-tick{position:absolute;top:10px;right:10px;width:20px;height:20px;border-radius:50%;background:#2563eb;color:#fff;display:none;align-items:center;justify-content:center;font-size:11px;}
.ss-supplier-row.selected .ss-sup-tick{display:flex;}

/* No variants warning */
.ss-no-variants{background:#fffbeb;border:1px solid #fde68a;border-radius:8px;padding:12px 16px;font-size:13px;color:#92400e;display:flex;gap:8px;align-items:flex-start;}

/* Modal footer */
.ss-modal-footer{padding:14px 24px;border-top:1px solid #f1f5f9;display:flex;justify-content:space-between;align-items:center;position:sticky;bottom:0;background:#fff;}
.btn-ss-back{background:none;border:1px solid #e2e8f0;padding:9px 18px;border-radius:8px;font-size:13px;font-weight:600;color:#475569;cursor:pointer;transition:background .15s;}
.btn-ss-back:hover{background:#f8fafc;}
.btn-ss-next{background:#2563eb;color:#fff;border:none;padding:9px 22px;border-radius:8px;font-size:13px;font-weight:600;cursor:pointer;transition:background .15s;display:flex;align-items:center;gap:7px;}
.btn-ss-next:hover{background:#1d4ed8;}
.btn-ss-next:disabled{background:#94a3b8;cursor:not-allowed;}
.ss-step-counter{font-size:13px;color:#94a3b8;}

/* ── Individual peptide rows ── */
.section-label{font-size:16px;font-weight:700;color:#0f172a;display:flex;align-items:center;gap:8px;margin-bottom:16px;}
.indiv-section-title{font-size:18px;font-weight:700;color:#0f172a;margin-bottom:16px;padding-top:8px;}
.peptide-row-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.peptide-row-item{background:#fff;border:1px solid #e2e8f0;border-radius:10px;padding:14px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px;transition:border-color .15s,box-shadow .12s;}
.peptide-row-item:hover{border-color:#bfdbfe;box-shadow:0 2px 8px rgba(37,99,235,.07);}
.peptide-row-item.in-stack{border-color:#86efac;background:#f0fdf4;}
.pep-row-info{flex:1;min-width:0;}
.pep-row-name{font-size:14px;font-weight:700;color:#0f172a;}
.pep-row-cat{font-size:12px;color:#94a3b8;}
.pep-row-right{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.pep-row-price{font-size:13px;font-weight:600;color:#2563eb;text-align:right;}
.pep-row-price small{font-size:11px;color:#94a3b8;display:block;font-weight:400;}
.btn-pep-add{width:32px;height:32px;border-radius:50%;background:#eff6ff;border:1px solid #bfdbfe;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#2563eb;font-size:20px;font-weight:300;line-height:1;transition:background .15s,transform .1s;flex-shrink:0;}
.btn-pep-add:hover{background:#2563eb;color:#fff;border-color:#2563eb;}
.btn-pep-add:active{transform:scale(.9);}
.btn-pep-add.added{background:#10b981;border-color:#10b981;color:#fff;font-size:14px;}

/* ── Your Stack sidebar ── */
.stack-sidebar{background:#fff;border:1px solid #e2e8f0;border-radius:14px;padding:22px;position:sticky;top:72px;}
.stack-sidebar-title{font-size:17px;font-weight:700;color:#0f172a;margin-bottom:2px;}
.stack-sidebar-count{font-size:13px;color:#64748b;margin-bottom:16px;}
.stack-empty{text-align:center;padding:28px 12px;color:#94a3b8;}
.stack-empty i{font-size:36px;display:block;margin-bottom:10px;color:#cbd5e1;}
.stack-empty p{font-size:13px;line-height:1.6;margin:0;}
.stack-item-list{display:flex;flex-direction:column;gap:0;}
.stack-item{display:flex;align-items:flex-start;justify-content:space-between;padding:10px 0;border-bottom:1px solid #f1f5f9;gap:8px;}
.stack-item:last-child{border-bottom:none;}
.stack-item-name{font-size:13px;font-weight:600;color:#0f172a;line-height:1.3;}
.stack-item-supplier{font-size:11px;color:#94a3b8;margin-top:2px;}
.stack-item-right{display:flex;align-items:center;gap:8px;flex-shrink:0;}
.stack-item-price{font-size:13px;font-weight:700;color:#0f172a;}
.btn-remove-item{background:none;border:none;color:#94a3b8;cursor:pointer;font-size:18px;line-height:1;padding:0 2px;transition:color .15s;}
.btn-remove-item:hover{color:#ef4444;}
.stack-total-row{display:flex;justify-content:space-between;align-items:center;padding:14px 0 12px;border-top:1.5px solid #e2e8f0;font-weight:700;font-size:15px;color:#0f172a;margin-top:4px;}
.stack-total-usd{font-size:12px;color:#94a3b8;font-weight:400;}
.btn-checkout-stack{width:100%;background:#2563eb;color:#fff;border:none;padding:11px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;margin-bottom:8px;transition:background .15s;display:flex;align-items:center;justify-content:center;gap:7px;}
.btn-checkout-stack:hover{background:#1d4ed8;}
.btn-clear-stack{width:100%;background:none;color:#64748b;border:1px solid #e2e8f0;padding:9px;border-radius:8px;font-size:13px;font-weight:500;cursor:pointer;transition:border-color .15s,color .15s;}
.btn-clear-stack:hover{border-color:#ef4444;color:#ef4444;}

/* Toast */
.stack-toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(20px);background:#0f172a;color:#fff;padding:10px 22px;border-radius:8px;font-size:13px;font-weight:500;opacity:0;transition:all .25s;z-index:9999;pointer-events:none;white-space:nowrap;}
.stack-toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

@media(max-width:991px){.peptide-row-grid{grid-template-columns:1fr;}.stack-sidebar{position:static;margin-top:32px;}}