.pdc-wrap{--pc:#3498db;--sc:#2c3e50;--ac:#e74c3c;--ok:#27ae60;--warn:#e67e22;--ink:#43586b;--mut:#5a6b7b;--line:#e3e8ee;font-family:'Poppins',system-ui,sans-serif;color:var(--sc);max-width:1080px;margin:0 auto;}
.pdc-wrap *:focus-visible{outline:2px solid var(--pc);outline-offset:2px;border-radius:4px;}

/* ── Layout ── */
.pdc-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:stretch;}
@media(max-width:820px){.pdc-grid{grid-template-columns:1fr;}}
.pdc-card{border:1px solid var(--line);border-radius:16px;padding:24px 24px 26px;background:linear-gradient(180deg,#f8fbff 0%,#fff 60%);box-shadow:0 1px 3px rgba(16,42,67,.05);}
.pdc-card h2{font-size:1.25rem;margin:0 0 4px;color:var(--sc);display:flex;align-items:center;gap:10px;}
.pdc-card h2 i{color:var(--pc);}
.pdc-step{flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:var(--pc);color:#fff;font-size:.85rem;font-weight:700;display:inline-flex;align-items:center;justify-content:center;}
.pdc-card .pdc-hint{margin:0 0 18px;color:var(--mut);font-size:.9rem;line-height:1.45;}

/* ── Fields ── */
.pdc-field{margin:0 0 15px;}
.pdc-field label{display:flex;align-items:center;gap:6px;font-weight:600;font-size:.9rem;margin:0 0 6px;color:#33485c;}
.pdc-input{display:flex;border:1px solid #cfd8e3;border-radius:10px;overflow:hidden;background:#fff;transition:border-color .15s,box-shadow .15s;}
.pdc-input:focus-within{border-color:var(--pc);box-shadow:0 0 0 3px rgba(52,152,219,.14);}
.pdc-input input,.pdc-input select{border:0;padding:11px 13px;font-size:1rem;font-family:inherit;width:100%;outline:none;background:transparent;color:var(--sc);}
.pdc-input .pdc-unit{flex:0 0 auto;background:#eef3f8;color:#52677b;font-size:.85rem;display:flex;align-items:center;padding:0 13px;border-left:1px solid #cfd8e3;font-weight:600;}
.pdc-input select{cursor:pointer;}
.pdc-chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:7px;}
.pdc-chips button{font-family:inherit;font-size:.76rem;font-weight:600;color:var(--mut);background:#fff;border:1px solid #dbe4ec;border-radius:999px;padding:3px 11px;cursor:pointer;transition:.12s;}
.pdc-chips button:hover{color:var(--pc);border-color:var(--pc);background:#f2f9ff;}

/* ── Tooltips ── */
.pdc-tip{position:relative;display:inline-flex;}
.pdc-tip-btn{width:17px;height:17px;border-radius:50%;border:1px solid #b9c8d6;background:#fff;color:#7d92a5;font-size:.68rem;font-weight:700;line-height:1;cursor:help;display:inline-flex;align-items:center;justify-content:center;padding:0;font-family:inherit;transition:.12s;}
.pdc-tip-btn:hover{border-color:var(--pc);color:var(--pc);}
.pdc-tipbox{position:absolute;bottom:calc(100% + 9px);left:50%;transform:translateX(-50%) translateY(3px);width:max-content;max-width:min(250px,76vw);background:var(--sc);color:#eef4f9;font-size:.76rem;font-weight:400;line-height:1.5;padding:9px 11px;border-radius:9px;box-shadow:0 6px 18px rgba(16,42,67,.28);opacity:0;visibility:hidden;transition:opacity .15s,transform .15s;z-index:40;pointer-events:none;text-align:left;}
.pdc-tipbox::after{content:'';position:absolute;top:100%;left:50%;transform:translateX(-50%);border:5px solid transparent;border-top-color:var(--sc);}
.pdc-tip:hover .pdc-tipbox,.pdc-tip:focus-within .pdc-tipbox,.pdc-tip.open .pdc-tipbox{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);}
.pdc-tip--edge .pdc-tipbox{left:auto;right:-8px;transform:translateY(3px);}
.pdc-tip--edge .pdc-tipbox::after{left:auto;right:12px;transform:none;}
.pdc-tip--edge:hover .pdc-tipbox,.pdc-tip--edge:focus-within .pdc-tipbox,.pdc-tip--edge.open .pdc-tipbox{transform:translateY(0);}

/* ── Step-1 outputs ── */
.pdc-out{margin-top:20px;border-top:1px dashed #d6e0ea;padding-top:18px;}
.pdc-out .pdc-row{display:flex;justify-content:space-between;align-items:baseline;gap:14px;padding:8px 0;border-bottom:1px solid #f0f4f8;}
.pdc-out .pdc-row:last-child{border-bottom:0;}
.pdc-out .pdc-row .k{color:#52677b;font-size:.92rem;display:inline-flex;align-items:center;gap:6px;}
.pdc-out .pdc-row .v{font-weight:700;font-size:1.12rem;color:var(--sc);text-align:right;}
.pdc-out .pdc-row .v.big{font-size:1.5rem;color:var(--pc);}

/* ── Syringe size control ── */
.pdc-seg{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;}
.pdc-seg button{font-family:inherit;border:1.5px solid #cfd8e3;background:#fff;border-radius:11px;padding:9px 6px 8px;cursor:pointer;text-align:center;transition:.14s;color:var(--sc);}
.pdc-seg button .n{display:block;font-size:1.15rem;font-weight:700;line-height:1.1;}
.pdc-seg button .s{display:block;font-size:.7rem;color:var(--mut);font-weight:600;margin-top:2px;}
.pdc-seg button:hover{border-color:var(--pc);}
.pdc-seg button[aria-pressed="true"]{border-color:var(--pc);background:linear-gradient(180deg,#eaf4fc,#f7fbff);box-shadow:0 0 0 3px rgba(52,152,219,.12);color:var(--pc);}
.pdc-seg button[aria-pressed="true"] .s{color:var(--pc);}
.pdc-seg-hint{margin:8px 0 0;font-size:.78rem;line-height:1.5;color:var(--mut);min-height:2.4em;}

/* ── Results panel ── */
.pdc-results{margin-top:22px;border:1px solid var(--line);border-radius:16px;background:linear-gradient(180deg,#fdfeff,#f6fafd);box-shadow:0 1px 3px rgba(16,42,67,.05);padding:24px 24px 22px;}
.pdc-results h2{font-size:1.25rem;margin:0 0 14px;color:var(--sc);display:flex;align-items:center;gap:10px;}
.pdc-results h2 i{color:var(--pc);}
.pdc-res-top{display:flex;flex-wrap:wrap;align-items:flex-end;gap:18px 34px;margin-bottom:6px;}
.pdc-draw .lbl{display:flex;align-items:center;gap:6px;font-size:.82rem;font-weight:600;color:var(--mut);text-transform:uppercase;letter-spacing:.04em;}
.pdc-draw .val{font-size:2.5rem;font-weight:700;color:var(--ac);line-height:1.05;}
.pdc-draw .val small{font-size:1.05rem;font-weight:600;color:var(--mut);margin-left:6px;}
.pdc-stats{display:flex;flex-wrap:wrap;gap:10px;}
.pdc-stat{background:#fff;border:1px solid var(--line);border-radius:11px;padding:8px 14px;min-width:104px;}
.pdc-stat .k{display:flex;align-items:center;gap:5px;font-size:.7rem;font-weight:600;color:var(--mut);text-transform:uppercase;letter-spacing:.04em;}
.pdc-stat .v{font-size:1.06rem;font-weight:700;color:var(--sc);margin-top:1px;}
@keyframes pdcPulse{0%{transform:scale(1)}35%{transform:scale(1.06)}100%{transform:scale(1)}}
.pdc-pulse{animation:pdcPulse .3s ease;}

/* ── Syringe ── */
.pdc-syr{margin:14px 0 4px;}
.pdc-syr svg{width:100%;height:auto;display:block;}
.pdc-syr .barrel{fill:#fff;stroke:var(--sc);stroke-width:2.5;}
.pdc-syr .barrel.over{stroke:var(--ac);}
.pdc-syr .metal{fill:#b9c8d6;}
.pdc-syr .tick{stroke:#93a7b8;stroke-width:1;}
.pdc-syr .tick.major{stroke:var(--sc);stroke-width:1.6;}
.pdc-syr .ticklbl{fill:#66798b;font-size:9.5px;font-weight:600;font-family:'Poppins',system-ui,sans-serif;}
.pdc-syr .axis{fill:#8a99a8;font-size:9px;font-weight:600;letter-spacing:.06em;font-family:'Poppins',system-ui,sans-serif;}
#pdLiquid{fill:url(#pdcLiq);transform-box:fill-box;transform-origin:left center;transform:scaleX(0);transition:transform .35s cubic-bezier(.22,.9,.35,1);}
#pdSeal{transition:transform .35s cubic-bezier(.22,.9,.35,1);}
#pdArrow{transition:transform .35s cubic-bezier(.22,.9,.35,1),opacity .2s;fill:var(--ac);}
@media(prefers-reduced-motion:reduce){#pdLiquid,#pdSeal,#pdArrow,.pdc-tipbox{transition:none;}.pdc-pulse{animation:none;}}

/* ── Guidance ── */
.pdc-guide{margin-top:10px;display:flex;flex-direction:column;gap:6px;}
.pdc-mark{font-size:.86rem;color:var(--ink);}
.pdc-mark.ok{color:var(--ok);font-weight:600;}
.pdc-mark.off{color:var(--warn);}
.pdc-note{font-size:.84rem;line-height:1.55;color:var(--warn);margin:0;}
.pdc-note.alert{color:var(--ac);font-weight:600;}
.pdc-rec{display:none;margin-top:2px;}
.pdc-rec button{font-family:inherit;font-size:.78rem;font-weight:600;color:var(--pc);background:#eef7ff;border:1px dashed var(--pc);border-radius:999px;padding:5px 13px;cursor:pointer;transition:.12s;}
.pdc-rec button:hover{background:var(--pc);color:#fff;border-style:solid;}
.pdc-res-foot{display:flex;justify-content:flex-end;margin-top:12px;}
.pdc-copy{font-family:inherit;font-size:.82rem;font-weight:600;color:var(--pc);background:#fff;border:1px solid #d3e3f0;border-radius:9px;padding:8px 14px;cursor:pointer;transition:.12s;display:inline-flex;align-items:center;gap:7px;}
.pdc-copy:hover{background:#eaf4fc;border-color:var(--pc);}
.pdc-copy.done{color:var(--ok);border-color:var(--ok);}

/* ── Article styles ── */
.pdc-keybox{margin-top:22px;padding:18px 24px;background:linear-gradient(180deg,#fdfeff,#f6fafd);border:1px solid var(--line);border-left:4px solid var(--pc);border-radius:10px;font-size:.9rem;line-height:1.55;color:var(--sc);box-shadow:0 1px 3px rgba(16,42,67,.05);}
.pdc-keybox p{margin:0;}
.pdc-article-note{background:#fdf2f0;border-left:4px solid var(--ac);padding:16px 18px;border-radius:0 10px 10px 0;font-size:.86rem;color:#7d4a42;margin:24px 0;}
ol.pdc-refs{margin:0 0 24px;padding-left:22px;}
ol.pdc-refs>li{font-size:.82rem;line-height:1.55;color:#5a6b7b;margin-bottom:9px;}
ol.pdc-refs>li a{color:var(--pc);word-break:break-word;}
.pdc-disc{margin:30px 0 0;padding:16px 18px;border-left:4px solid var(--ac);background:#fdf2f0;border-radius:0 10px 10px 0;font-size:.86rem;color:#7d4a42;line-height:1.55;}
.pdc-foot-links{margin-top:26px;display:flex;flex-wrap:wrap;gap:10px;}
.pdc-foot-links a{text-decoration:none;font-weight:600;font-size:.9rem;color:var(--pc);border:1px solid #d3e3f0;border-radius:8px;padding:9px 14px;background:#fff;transition:.12s;}
.pdc-foot-links a:hover{background:#eaf4fc;border-color:var(--pc);}