/* ============================================================
   ApX-style VRAM calculator — replica stylesheet
   Design tokens sampled from the reference screenshots.
   ============================================================ */
:root{
  --violet:#7950f2;
  --violet-9:#5f3dc4;
  --violet-7:#6741d9;
  --violet-1:#e5dbff;
  --violet-0:#f3f0ff;
  --bg:#f1f3f5;
  --card:#fff;
  --border:#e9ecef;
  --border-strong:#dee2e6;
  --text:#212529;
  --text-2:#495057;
  --text-3:#868e96;
  --text-4:#adb5bd;
  --green:#40c057;
  --green-9:#2f9e44;
  --red:#fa5252;
  --yellow:#fcc419;
  --blue:#339af0;
  --cyan:#22b8cf;
  --grape:#be4bdb;
  --orange:#fd7e14;
  --teal:#12b886;
  --indigo:#4c6ef5;
  --pink:#e64980;
  --lime:#82c91e;
  --radius:8px;
  --ctl:4px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:14px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
button{font-family:inherit}
input,select{font-family:inherit}
a{color:var(--violet-9)}
.ic{display:inline-flex;width:16px;height:16px;flex:0 0 auto;align-items:center;justify-content:center}
.ic svg{width:100%;height:100%;display:block}

/* ---------------- header ---------------- */
.site-header{
  position:sticky;top:0;z-index:300;
  height:48px;display:flex;align-items:center;gap:16px;
  padding:0 16px;background:#fff;border-bottom:1px solid var(--border-strong);
}
.brand{display:flex;align-items:center;gap:6px;text-decoration:none;color:var(--text);font-size:16px;font-weight:600;letter-spacing:.2px}
.brand-mark{width:22px;height:22px;color:var(--violet)}
.main-nav{
  position:absolute;left:50%;transform:translateX(-50%);
  display:flex;align-items:center;gap:26px;font-size:14px;
}
.main-nav a{color:var(--text);text-decoration:none;padding:4px 0}
.main-nav a:hover{color:var(--violet-9)}
.main-nav a.active{font-weight:500}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:8px}
.btn{border:0;height:30px;padding:0 14px;border-radius:var(--ctl);font-size:14px;cursor:pointer;font-weight:400}
.btn-login{background:var(--violet-1);color:var(--violet-9)}
.btn-login:hover{background:#d0bfff}
.btn-register{background:var(--violet);color:#fff}
.btn-register:hover{background:#6741d9}
.lang-pill{
  height:30px;min-width:34px;padding:0 9px;border-radius:999px;
  border:1px solid var(--border-strong);background:#fff;color:var(--text-2);
  display:inline-flex;align-items:center;justify-content:center;gap:4px;
  font-size:13px;cursor:pointer;
}
.lang-pill:hover{background:#f8f9fa}

/* ---------------- shell ---------------- */
.app{display:flex;align-items:flex-start}
.rail{
  width:50px;flex:0 0 50px;background:#fff;border-right:1px solid var(--border);
  position:sticky;top:48px;height:calc(100vh - 48px);
  display:flex;flex-direction:column;align-items:center;gap:2px;padding:10px 0;
}
.rail-btn{
  width:34px;height:34px;border:0;border-radius:6px;background:none;color:var(--text-3);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
}
.rail-btn svg{width:18px;height:18px}
.rail-btn:hover{background:var(--bg);color:var(--text-2)}
.rail-btn.active{background:var(--violet-1);color:var(--violet)}
.rail-sep{width:20px;height:1px;background:var(--border);margin:6px 0}

.work{flex:1;min-width:0;display:flex;align-items:flex-start;background:var(--bg)}
.main-col{flex:1;min-width:0;padding:16px 16px 0}
.side-col{
  flex:0 0 392px;width:392px;background:#fff;
  height:calc(100vh - 48px);position:sticky;top:48px;overflow-y:auto;
  padding:40px 40px 48px;
}
.side-col::-webkit-scrollbar{width:10px}
.side-col::-webkit-scrollbar-thumb{background:#dee2e6;border-radius:10px;border:3px solid #fff}

/* ---------------- cards ---------------- */
.card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:32px 40px;margin-bottom:16px;
}
.card-title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
.card-title-row h1{font-size:24px;line-height:1.3;font-weight:700;margin:0;letter-spacing:.2px}
.ghost-action{
  border:0;background:none;color:var(--violet-9);font-size:14px;cursor:pointer;
  display:inline-flex;align-items:center;gap:6px;padding:4px 8px;border-radius:var(--ctl);white-space:nowrap;
}
.ghost-action:hover{background:var(--violet-0)}

/* segmented control */
.segmented{display:flex;background:var(--bg);border-radius:6px;padding:3px;gap:2px}
.seg-btn{
  flex:1;height:34px;border:0;border-radius:var(--ctl);background:transparent;
  font-size:14px;color:var(--text-2);cursor:pointer;
}
.seg-btn:hover{color:var(--text)}
.seg-btn.active{background:#fff;color:var(--text);font-weight:500;box-shadow:0 1px 3px rgba(0,0,0,.12)}
.mode-seg{margin-top:20px}

/* form layout */
.calc-body{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;margin-top:26px}
.calc-left,.calc-right{min-width:0}

.field{margin-bottom:18px}
.field-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:6px}
.flabel{display:block;font-size:14px;font-weight:500;color:var(--text);margin-bottom:6px}
.flabel.row{margin-bottom:0;display:flex;align-items:center;gap:2px}
.req{color:var(--red);margin-left:1px}
.link-xs{
  border:0;background:none;color:var(--violet-9);font-size:11px;font-weight:500;
  cursor:pointer;padding:2px 8px;border-radius:var(--ctl);white-space:nowrap;
}
.link-xs:hover{background:var(--violet-0)}
.help{font-size:11px;color:var(--text-3);margin-top:6px;line-height:1.5}

/* select */
.select{position:relative}
.select-trigger{
  width:100%;height:36px;display:flex;align-items:center;gap:8px;
  padding:0 10px;border:1px solid #ced4da;border-radius:var(--ctl);
  background:#fff;color:var(--text);font-size:14px;cursor:pointer;text-align:left;
}
.select-trigger:hover{border-color:var(--text-4)}
.select-trigger.open{border-color:var(--violet)}
.select-trigger .sel-ic{width:16px;height:16px;flex:0 0 16px;color:var(--text-2)}
.select-trigger .sel-text{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.select-trigger .sel-chev{width:16px;height:16px;flex:0 0 16px;color:var(--text-3);transition:transform .15s}
.select-trigger.open .sel-chev{transform:rotate(180deg)}
.dropdown{
  position:absolute;z-index:400;left:0;right:0;top:calc(100% + 4px);
  background:#fff;border-radius:6px;padding:4px;max-height:300px;overflow-y:auto;
  box-shadow:0 0 0 1px rgba(0,0,0,.03),0 2px 6px rgba(0,0,0,.06),0 12px 28px rgba(0,0,0,.12);
}
.dropdown::-webkit-scrollbar{width:10px}
.dropdown::-webkit-scrollbar-thumb{background:#dee2e6;border-radius:10px;border:3px solid #fff}
.opt{display:flex;align-items:center;gap:8px;padding:7px 10px;border-radius:var(--ctl);font-size:14px;cursor:pointer;color:var(--text)}
.opt:hover,.opt.hl{background:var(--bg)}
.opt-check{width:14px;height:14px;flex:0 0 14px;color:var(--text-2);opacity:0}
.opt.checked .opt-check{opacity:1}
.opt-main{min-width:0;flex:1}
.opt-sub{font-size:11px;color:var(--text-3);line-height:1.35;margin-top:1px}
.opt-group{font-size:11px;color:var(--text-3);padding:8px 10px 4px;font-weight:400}
.dropdown-empty{padding:10px;font-size:12px;color:var(--text-3);text-align:center}

/* badges / pills */
.pill-badge{
  min-width:26px;height:20px;padding:0 8px;border-radius:999px;
  background:var(--violet);color:#fff;font-size:12px;font-weight:600;
  display:inline-flex;align-items:center;justify-content:center;
}
.mini-badges{display:inline-flex;align-items:center;gap:4px;margin-right:8px}
.mini-badge{
  display:inline-flex;align-items:center;height:17px;padding:0 5px;gap:3px;
  border:1px solid #ced4da;border-radius:var(--ctl);background:#f8f9fa;
  color:var(--text-2);font-size:10px;font-weight:500;letter-spacing:.2px;
}
.tag-badge{
  display:inline-flex;align-items:center;height:18px;padding:0 6px;border-radius:var(--ctl);
  background:var(--violet-0);color:var(--violet-9);font-size:11px;font-weight:600;
}
.tag-badge.gray{background:var(--bg);color:var(--text-2)}
.tag-badge .ic{width:11px;height:11px;margin-right:2px}

/* sliders */
.slider-block{margin-bottom:20px}
.slider-head{display:flex;align-items:center;gap:6px;min-height:20px}
.slider-title{font-size:14px;font-weight:500;color:var(--text)}
.slider-head .spacer{flex:1}
.slider{position:relative;height:22px;margin-top:12px;touch-action:none}
.slider .track{position:absolute;left:0;right:0;top:50%;height:4px;border-radius:2px;background:var(--border);transform:translateY(-50%)}
.slider .fill{position:absolute;left:0;top:50%;height:4px;border-radius:2px;background:var(--violet);transform:translateY(-50%)}
.slider .thumb{
  position:absolute;top:50%;width:16px;height:16px;border-radius:50%;
  background:#fff;border:2px solid var(--violet);transform:translate(-50%,-50%);
  cursor:grab;box-shadow:0 1px 2px rgba(0,0,0,.12);
}
.slider .thumb:active{cursor:grabbing}
.slider:focus-visible .thumb{outline:2px solid var(--violet);outline-offset:2px}
.marks{position:relative;height:16px;font-size:12px;color:var(--text-3);margin-top:0;padding:0 1px}
.marks>span{position:absolute;top:0;transform:translateX(-50%);white-space:nowrap}
.chips-row{display:flex;justify-content:space-between;margin-before:0}
.chip-btn{
  border:0;background:none;font-size:12px;color:var(--text-3);cursor:pointer;
  padding:2px 7px;border-radius:var(--ctl);
}
.chip-btn:hover{background:#f8f9fa;color:var(--text-2)}
.chip-btn.active{color:var(--violet-9);font-weight:600}

/* accordion-ish sections */
.acc{border-top:1px solid var(--border);margin-top:4px}
.acc-head{
  display:flex;align-items:center;gap:8px;width:100%;padding:12px 0;
  border:0;background:none;cursor:pointer;font-size:14px;color:var(--text);
}
.acc-head .ic.acc-ic{width:14px;height:14px;color:var(--violet)}
.acc-hint{margin-left:auto;display:inline-flex;align-items:center;gap:6px;color:var(--violet-9);font-size:13px}
.acc-hint .ic{width:14px;height:14px;transition:transform .15s}
.acc.open .acc-hint .ic{transform:rotate(180deg)}
.acc-body{display:none;padding:2px 0 14px}
.acc.open .acc-body{display:block}

/* misc blocks */
.section-label{font-size:15px;color:var(--text-2);margin:18px 0 12px;font-weight:400}
.hw-seg{margin-bottom:18px}
.hw-seg .seg-btn{height:32px}
.config-tabs{display:inline-flex;align-items:center;gap:4px}
.config-tabs .lbl{font-size:12px;color:var(--text-3);margin-right:2px}
.micro-seg{display:inline-flex;background:var(--bg);border:1px solid var(--border);border-radius:var(--ctl);padding:2px}
.micro-seg button{
  border:0;background:none;border-radius:3px;font-size:11px;color:var(--text-2);
  padding:2px 8px;cursor:pointer;
}
.micro-seg button.active{background:#fff;color:var(--violet-9);font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.08)}
.gpu-meta{font-size:11px;color:var(--text-3);margin-top:7px;display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.gpu-meta a{color:var(--violet-9);text-decoration:none}
.gpu-meta a:hover{text-decoration:underline}
.center-link{
  display:flex;align-items:center;justify-content:center;gap:6px;
  margin:14px auto 0;border:0;background:none;cursor:pointer;
  color:var(--text-2);font-size:13px;
}
.center-link:hover{color:var(--violet-9)}
.center-link .ic{width:15px;height:15px}

.num-field{display:flex;align-items:center;gap:8px;margin-top:6px}
.num-input{
  width:100%;height:34px;border:1px solid #ced4da;border-radius:var(--ctl);
  padding:0 10px;font-size:14px;color:var(--text);background:#fff;
}
.num-input:focus{outline:0;border-color:var(--violet)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:8px 16px}
.small-label{font-size:12px;font-weight:500;color:var(--text-2);margin-bottom:4px}
.small-help{font-size:11px;color:var(--text-3);margin-top:4px;line-height:1.45}

/* checkbox */
.check-row{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text);cursor:pointer;user-select:none}
.check-row input[type=checkbox]{
  appearance:none;width:16px;height:16px;border:1.5px solid #ced4da;border-radius:3px;
  background:#fff;cursor:pointer;position:relative;flex:0 0 16px;margin:0;
}
.check-row input[type=checkbox]:checked{background:var(--violet);border-color:var(--violet)}
.check-row input[type=checkbox]:checked::after{
  content:"";position:absolute;left:4px;top:1px;width:5px;height:9px;
  border:solid #fff;border-width:0 2px 2px 0;transform:rotate(42deg);
}
.check-box{border:1px solid var(--border);border-radius:6px;padding:14px 16px}

/* ---------------- simulation card ---------------- */
.sim-card{padding:24px 32px 32px}
.sim-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
.sim-head h3{font-size:16px;font-weight:600;margin:0 0 4px}
.sim-desc{margin:0;font-size:13px;color:var(--text-2)}
.sim-seq{font-size:12px;color:var(--text-3);margin-top:2px}
.sim-head .check-row{margin-top:8px;font-size:12px;color:var(--text-2)}
.sim-actions{display:flex;gap:8px}
.icon-btn{
  width:36px;height:36px;border-radius:50%;border:1px solid var(--border);
  background:#fff;color:var(--text-2);display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;
}
.icon-btn:hover{background:#f8f9fa}
.icon-btn .ic{width:16px;height:16px}
.sim-stage{
  margin-top:14px;border:1px solid var(--border);border-radius:6px;background:#fff;
  height:420px;padding:18px 20px;overflow:auto;font-size:13px;color:var(--text);
}
.sim-placeholder{display:flex;align-items:center;justify-content:center;height:100%;color:var(--text-4);font-size:13px}
.sim-line{white-space:pre-wrap;word-break:break-word;line-height:1.6}
.sim-token{animation:fade .18s ease}
@keyframes fade{from{opacity:0}to{opacity:1}}
.sim-cursor{display:inline-block;width:7px;height:15px;background:var(--violet);vertical-align:-2px;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.sim-stat{font-size:11px;color:var(--text-3);margin-top:10px;border-top:1px solid var(--border);padding-top:8px}

/* ---------------- faq / version ---------------- */
.faq-card,.version-card{padding:24px 32px 28px}
.section-toggle{display:flex;align-items:center;gap:8px;width:100%;border:0;background:none;padding:0;cursor:pointer}
.section-toggle h3{font-size:16px;font-weight:600;margin:0}
.section-toggle .chev{margin-left:auto;color:var(--text-3);transition:transform .15s}
.section-toggle.closed .chev{transform:rotate(-90deg)}
.faq-item{margin-top:10px;border:1px solid var(--border);border-radius:6px;background:#f8f9fa}
.faq-item.open{background:#fff}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;
  padding:14px 16px;border:0;background:none;cursor:pointer;font-size:14px;color:var(--text);text-align:left;
}
.faq-q .chev{color:var(--text-3);width:16px;height:16px;flex:0 0 16px;transition:transform .15s}
.faq-item.open .faq-q .chev{transform:rotate(180deg)}
.faq-a{display:none;padding:0 16px 16px;font-size:12px;color:var(--text-2);line-height:1.7}
.faq-a p{margin:0 0 8px}
.faq-a a{color:var(--violet-9)}
.faq-item.open .faq-a{display:block}
.version-meta{margin-left:auto;font-size:12px;color:var(--text-3)}
.version-list{margin-top:6px}
.version-item{display:flex;gap:16px;padding:10px 0;border-bottom:1px solid var(--bg);font-size:12px;color:var(--text-2)}
.version-item:last-child{border-bottom:0}
.version-date{color:var(--text-3);flex:0 0 118px}
.version-desc{flex:1}

/* ---------------- footer ---------------- */
.site-footer{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:14px 4px 30px;font-size:12px;color:var(--text-3);
}
.footer-links{display:flex;gap:20px;flex-wrap:wrap}
.footer-links a{color:var(--text-3);text-decoration:none}
.footer-links a:hover{color:var(--violet-9)}

/* ---------------- results sidebar ---------------- */
.results h2{font-size:18px;font-weight:600;margin:0;letter-spacing:.2px}
.res-head{display:flex;align-items:center;gap:8px;margin-bottom:26px}
.res-head .share{margin-left:auto;border:0;background:none;color:var(--text-3);cursor:pointer;padding:4px;border-radius:var(--ctl);display:flex}
.res-head .share:hover{background:var(--bg);color:var(--text-2)}
.ring-wrap{display:flex;justify-content:center;margin:2px 0 0}
.ring{position:relative;width:168px;height:168px}
.ring svg{display:block;transform:rotate(-90deg)}
.ring-center{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px}
.ring-pct{font-size:23px;font-weight:700;letter-spacing:.3px}
.ring-label{font-size:12px;color:var(--text-3)}
.status-row{display:flex;justify-content:center;margin-top:6px}
.status-pill{display:inline-flex;align-items:center;padding:2px 12px;border-radius:999px;color:#fff;font-size:13px;font-weight:600}
.vram-big{font-size:25px;font-weight:700;text-align:center;margin-top:12px;letter-spacing:.2px}
.vram-cap{font-size:13px;color:var(--text-3);text-align:center;margin-top:2px}
.res-tabs{display:flex;border-bottom:1px solid var(--border);margin:22px 0 6px}
.res-tab{
  flex:1;display:inline-flex;align-items:center;justify-content:center;gap:6px;
  border:0;background:none;padding:10px 0 11px;margin-bottom:-1px;
  font-size:13px;color:var(--text-2);cursor:pointer;border-bottom:2px solid transparent;
}
.res-tab .ic{width:14px;height:14px}
.res-tab.active{color:var(--text);font-weight:600;border-bottom-color:var(--violet)}
.res-tab:hover{color:var(--text)}
.metric{padding:7px 0}
.metric-main{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text)}
.metric-main .ic{width:14px;height:14px;color:var(--text-3)}
.metric-main .val{font-weight:400}
.metric-sub{font-size:11px;color:var(--text-3);margin:1px 0 0 20px}
.info-ic{width:13px;height:13px;color:var(--text-4);cursor:help;flex:0 0 13px}
.divider{border:0;border-top:1px solid var(--border);margin:16px 0}
.model-block{margin-top:4px}
.model-title{text-align:center;font-size:13px;font-weight:600;color:var(--text);margin-bottom:10px}
.model-title .provider{font-weight:400;color:var(--text-2)}
.info-line{display:flex;align-items:center;justify-content:center;gap:6px;margin:7px 0;font-size:12px;color:var(--text-2)}
.info-line .lbl{color:var(--text-3)}
.link-center{display:flex;align-items:center;justify-content:center;gap:4px;margin-top:12px;font-size:12px;color:var(--violet-9);text-decoration:none}
.link-center:hover{text-decoration:underline}
.alloc{margin-top:20px}
.alloc h3{font-size:14px;font-weight:600;margin:0 0 12px;color:var(--text)}
.stack-bar{display:flex;width:100%;height:16px;border-radius:4px;overflow:hidden;background:var(--bg)}
.stack-seg{display:flex;align-items:center;justify-content:center;overflow:hidden;color:#fff;font-size:10px;font-weight:700;white-space:nowrap}
.legend{display:grid;grid-template-columns:1fr 1fr;gap:14px 16px;margin-top:16px}
.leg{min-width:0}
.leg-top{display:flex;align-items:baseline;justify-content:space-between;gap:6px;font-size:11px;color:var(--text-3)}
.leg-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:flex;align-items:center;gap:4px}
.leg-val{font-size:12px;font-weight:700;color:var(--text);white-space:nowrap}
.leg-pct{font-size:12px;font-weight:700;white-space:nowrap}
.leg-bar{height:3px;border-radius:2px;margin-top:5px;opacity:.95}
.leg-info{width:11px;height:11px;color:var(--text-4)}
.detail-toggle{
  display:flex;align-items:center;gap:4px;margin-top:14px;border:0;background:none;
  color:var(--text-3);font-size:12px;cursor:pointer;padding:2px 0;
}
.detail-toggle:hover{color:var(--text-2)}
.detail-toggle .chev{width:14px;height:14px;transition:transform .15s}
.detail-toggle.open .chev{transform:rotate(180deg)}
.detail-box{margin-top:10px}
.detail-list{margin-top:12px}
.detail-item{display:flex;align-items:center;gap:8px;padding:5px 0;font-size:11px;color:var(--text-2)}
.dot{width:8px;height:8px;border-radius:50%;flex:0 0 8px}
.detail-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:flex;align-items:center;gap:3px}
.detail-gb{color:var(--text);font-weight:700;white-space:nowrap}
.detail-pct{color:var(--text-3);white-space:nowrap;flex:0 0 48px;text-align:right}

/* energy tab */
.energy-grid{display:flex;gap:28px;padding:10px 0 4px}
.energy-stat .k{display:flex;align-items:center;gap:4px;font-size:11px;color:var(--text-3)}
.energy-stat .v{font-size:17px;font-weight:700;color:var(--text);margin-top:2px}
.energy-stat .v .u{font-size:12px;font-weight:400;color:var(--text-3)}
.tip-box{background:#f8f9fa;border-radius:6px;padding:12px 14px;margin-top:14px}
.tip-box .title{font-size:12px;color:var(--text-3);margin-bottom:6px}
.kv{display:flex;align-items:baseline;justify-content:space-between;gap:8px;font-size:12px;color:var(--text-2);padding:2px 0}
.kv .k{display:flex;align-items:baseline;gap:4px;color:var(--text-2)}
.kv .k .sub{font-size:11px;color:var(--text-3)}
.kv .v{font-weight:700;color:var(--text);white-space:nowrap}
.kv .v .sub{font-size:11px;font-weight:400;color:var(--text-3);margin-right:6px}
.tip-note{font-size:10px;color:var(--text-4);margin-top:4px}
.energy-section{margin-top:16px}
.energy-title{font-size:12px;color:var(--text-3);margin-bottom:6px}
.price-row{display:flex;align-items:center;gap:8px;margin-top:6px}
.price-input{flex:1;display:flex;align-items:center;height:34px;border:1px solid #ced4da;border-radius:var(--ctl);padding:0 10px;gap:2px;background:#fff}
.price-input .pre{font-size:13px;color:var(--text-3)}
.price-input input{border:0;outline:0;flex:1;min-width:0;font-size:14px;color:var(--text);background:none}
.price-input .suf{font-size:12px;color:var(--text-3)}
.stepper{display:flex;flex-direction:column;gap:2px}
.stepper button{width:22px;height:15px;border:1px solid var(--border);background:#fff;color:var(--text-2);font-size:10px;cursor:pointer;border-radius:2px;padding:0;display:flex;align-items:center;justify-content:center}
.quick-btns{display:flex;gap:8px;margin-top:8px;flex-wrap:wrap}
.quick-btns button{font-size:11px;color:var(--text-2);border:1px solid var(--border);background:#fff;border-radius:var(--ctl);padding:4px 10px;cursor:pointer}
.quick-btns button.active{background:var(--violet-0);border-color:#d0bfff;color:var(--violet-9);font-weight:600}
.quick-btns .flag{color:var(--text-4);margin-right:4px}
.quick-btns .us{color:var(--blue);margin-right:4px}
.quick-btns .eu{color:#1098ad;margin-right:4px}
.co2-row{display:flex;justify-content:space-between;align-items:baseline;font-size:12px;color:var(--text-2);padding:4px 0}
.co2-val{color:var(--green-9);font-weight:700}

/* notes / advisories */
.notes{margin-top:14px}
.note{display:flex;gap:6px;align-items:flex-start;font-size:11px;line-height:1.5;border-radius:4px;padding:8px 10px;margin-top:6px;background:#fff9db;color:#5f3d00}
.note.warn{background:#fff4e6;color:#663800}
.note.err{background:#fff5f5;color:#7a2020}

/* load state */
.loading{color:var(--text-3);font-size:13px;padding:24px 0}

/* ---------------- responsive ---------------- */
@media (max-width:1280px){
  .side-col{flex:0 0 340px;width:340px;padding:32px 28px 40px}
  .card{padding:28px 28px}
  .calc-body{gap:28px}
}
@media (max-width:1040px){
  .main-nav{display:none}
  .work{flex-direction:column}
  .side-col{width:100%;flex:1 1 auto;height:auto;position:static;border-top:1px solid var(--border)}
  .calc-body{grid-template-columns:1fr}
  .rail{display:none}
}
@media (max-width:640px){
  .card{padding:20px 16px}
  .header-actions .btn-login{display:none}
}

/* ============================================================
   additions: numeric controls, modal, planner, misc
   ============================================================ */
.num-ctl{position:relative;display:block}
.num-ctl .num-input{padding-right:30px}
.num-steppers{position:absolute;right:4px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:1px}
.num-steppers button{
  width:18px;height:13px;border:0;background:none;color:var(--text-3);font-size:8px;
  line-height:1;cursor:pointer;padding:0;border-radius:2px;
}
.num-steppers button:hover{background:var(--bg);color:var(--text-2)}
.num-input[disabled]{background:#f8f9fa;color:var(--text-3)}
.inline-num{
  width:82px;height:26px;border:1px solid #ced4da;border-radius:4px;padding:0 6px;
  font-size:12px;color:var(--text);background:#fff;text-align:right;margin-right:4px;
}
.inline-num:focus{outline:0;border-color:var(--violet)}

/* modal */
.modal-backdrop{
  position:fixed;inset:0;z-index:900;background:rgba(0,0,0,.45);
  display:flex;align-items:center;justify-content:center;padding:24px;
}
.modal{
  width:560px;max-width:100%;max-height:86vh;overflow:auto;background:#fff;border-radius:10px;
  box-shadow:0 20px 50px rgba(0,0,0,.25);
}
.modal.wide{width:720px}
.modal-head{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:18px 22px;border-bottom:1px solid var(--border);position:sticky;top:0;background:#fff;z-index:2;
}
.modal-head h3{margin:0;font-size:16px;font-weight:600}
.modal-close{border:0;background:none;font-size:15px;color:var(--text-3);cursor:pointer;padding:4px 8px;border-radius:4px}
.modal-close:hover{background:var(--bg);color:var(--text)}
.modal-body{padding:20px 22px 22px}
.modal-sub{font-size:12px;color:var(--text-3);margin-bottom:12px}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}
.spec-title{font-size:15px;font-weight:600;margin-bottom:14px}
.spec-table{width:100%;border-collapse:collapse;font-size:12px}
.spec-table td{padding:7px 8px;border-bottom:1px solid var(--bg);color:var(--text-2)}
.spec-table td:first-child{color:var(--text-3);width:42%}
.spec-table td:last-child{color:var(--text);font-weight:500}

/* planner */
.plan-target{display:flex;align-items:center;gap:10px}
.plan-model{font-size:13px;font-weight:600}
.plan-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.chips-inline{display:flex;flex-wrap:wrap;gap:6px;margin-top:4px}
.chips-inline .chip-btn{border:1px solid var(--border);background:#fff;font-size:12px;color:var(--text-2);padding:4px 10px;border-radius:4px;cursor:pointer}
.chips-inline .chip-btn:hover{background:var(--bg)}
.chips-inline .chip-btn.active{background:var(--violet-0);border-color:#d0bfff;color:var(--violet-9);font-weight:600}
.plan-best{border:1px solid var(--border);border-radius:8px;padding:14px 16px;margin-bottom:16px;background:#f8f9ff}
.plan-best-head{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.plan-best-quant{margin-left:auto;font-size:11px;color:var(--text-3)}
.plan-best-body{font-size:12px;color:var(--text-2);margin-bottom:8px}
.plan-best-metrics{display:flex;gap:24px;font-size:12px;color:var(--text-2);margin-bottom:12px}
.plan-best-metrics b{color:var(--text);font-size:13px}
.plan-table{width:100%;border-collapse:collapse;font-size:11px}
.plan-table th{text-align:left;font-weight:500;color:var(--text-3);padding:6px 6px;border-bottom:1px solid var(--border)}
.plan-table td{padding:7px 6px;border-bottom:1px solid var(--bg);color:var(--text-2)}
.plan-table tr:hover td{background:#f8f9fa}

/* toast */
.toast{
  position:fixed;left:50%;bottom:32px;transform:translate(-50%,10px);z-index:1000;
  background:#212529;color:#fff;font-size:12px;padding:9px 16px;border-radius:6px;opacity:0;
  transition:opacity .18s,transform .18s;pointer-events:none;box-shadow:0 6px 18px rgba(0,0,0,.2);
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* font-size normalisation used by new form controls */
.small-label .ic, .flabel .ic{width:13px;height:13px;vertical-align:-2px;color:var(--text-4)}
.hr{height:1px;background:var(--border);margin:18px 0}
.acc-ic{color:var(--violet)}

/* ============================================================
   typography / spacing pass to match the original more closely
   ============================================================ */
.card{padding:31px 39px 30px}
.card-title-row h1{font-size:24px;line-height:1.25;letter-spacing:0;font-weight:700}
.mode-seg{margin-top:30px}
.calc-body{margin-top:24px;gap:41px}
.field{margin-bottom:20px}
.field-head{margin-bottom:7px}
.flabel{font-size:12.5px;font-weight:500;color:var(--text);margin-bottom:7px}
.help{font-size:11px;margin-top:7px;line-height:1.45}
.select-trigger{height:33px;padding:0 10px;font-size:13px;gap:7px;border-radius:5px}
.select-trigger .sel-ic{width:15px;height:15px;flex:0 0 15px;color:var(--text-2)}
.select-trigger .sel-chev{width:15px;height:15px;flex:0 0 15px;color:var(--text-3)}
.segmented{padding:3px;border-radius:8px;background:#f1f3f5}
.seg-btn{height:26px;font-size:13px;font-weight:500;color:var(--text-2);border-radius:6px}
.seg-btn.active{background:#fff;color:var(--text);font-weight:600;border:1px solid var(--border);box-shadow:0 1px 2px rgba(0,0,0,.05)}
.hw-seg .seg-btn{height:29px}
.slider-title{font-size:13px;font-weight:600}
.slider{height:20px;margin-top:10px}
.slider .track{height:8px;border-radius:4px}
.slider .thumb{width:16px;height:16px;border:3px solid var(--violet);background:#fff;top:-4px}
.slider .fill{height:8px;border-radius:4px}
.marks{font-size:11px}
.marks>span{font-size:11px}
.section-label{font-size:13px;color:var(--text-3);margin:20px 0 12px;font-weight:400}
.mode-seg + .calc-body{}
.gpu-meta{font-size:11px;margin-top:8px}
.center-link{font-size:12px;color:var(--text-3)}
.link-xs{font-size:11px}
.micro-seg{border-radius:5px;padding:2px}
.micro-seg button{font-size:11px}
.config-tabs .lbl{font-size:11px}
.acc-head{font-size:13px}
.acc-hint{font-size:12px}
.pill-badge{font-size:11px}
.mini-badge{font-size:10px}
.sim-desc,.sim-seq{font-size:13px}
.sim-head h3{font-size:16px}
.faq-q{font-size:13px}
.version-item{font-size:12px}
.site-footer{font-size:11.5px}
.note{font-size:11.5px}

/* modal form controls */
.modal .num-input{height:33px;font-size:13px}
select.num-input{
  appearance:none;-webkit-appearance:none;
  height:33px;border:1px solid #ced4da;border-radius:5px;background:#fff url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23868e96' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") no-repeat right 9px center/14px;
  padding:0 30px 0 10px;font-size:13px;color:var(--text);cursor:pointer;
}
select.num-input:focus{outline:0;border-color:var(--violet)}
.section-toggle.open .chev{transform:rotate(180deg)}
.section-toggle .chev{transition:transform .15s}
.card{padding-top:27px}
.card-title-row h1{line-height:1.2}
.mode-seg{margin-top:44px}
.hr{margin:14px 0}
.section-label{margin:18px 0 12px}
.flabel{margin-bottom:5px}
.help{line-height:1.35;margin-top:5px}
.field{margin-bottom:18px}
.hr{margin:12px 0}
.section-label{margin:16px 0 10px}
.mode-seg{margin-top:46px}
.calc-body{margin-top:21px}
.hr{margin:8px 0}
.hw-seg{margin-bottom:24px}
.acc-head{padding:8px 0}
.section-label{margin:26px 0 10px}
.side-col{padding-top:37px}
.res-head{margin-bottom:16px}
.ring-wrap{margin-top:0}
.status-row{margin-top:22px}
.status-pill{padding:6px 20px;font-size:14px;line-height:20px;font-weight:600}
.vram-big{font-size:24px;margin-top:6px}
.vram-cap{margin-top:5px}
.res-tabs{margin-top:38px}
.metric{margin-bottom:6px;padding:9px 0}
.model-block{margin-top:10px}
.alloc{margin-top:46px}
.res-tabs{margin-top:30px}
.metric{padding:6px 0;margin-bottom:0}
.metric-sub{margin:8px 0 0 20px}
.divider{margin:24px 0 16px}
.alloc{margin-top:40px}
.model-block{margin-top:6px}
.res-tabs{margin-bottom:13px}
.divider{margin:13px 0 16px}
.model-block{margin-top:0}
.alloc{margin-top:58px}
.alloc h3{margin-bottom:36px}
.tag-badge{height:20px;padding:0 8px;font-size:12px}
.status-pill{padding:6px 22px;font-size:15px}
.tag-suffix{font-size:10px;color:var(--text-3);margin-left:3px}
.info-ic{color:var(--text-3)}
.ring-pct{font-size:20px}
.tag-badge{height:19px;padding:0 7px;font-size:11px}

/* ---------------- Pro 授权与升级 ---------------- */
.brand-name { font-weight: 700; font-size: 15px; letter-spacing: .2px; }
.plan-badge {
  display: inline-flex; align-items: center; height: 20px; padding: 0 8px; margin-left: 8px;
  border-radius: 10px; background: #f1f3f5; color: #868e96; font-size: 11px; font-weight: 500;
  vertical-align: middle; white-space: nowrap;
}
.plan-badge.pro { background: #e5dbff; color: #5f3dc4; }
.pro-tag {
  display: inline-flex; align-items: center; height: 15px; padding: 0 5px; margin-left: 5px;
  border-radius: 4px; background: #e5dbff; color: #5f3dc4; font-size: 9px; font-weight: 700;
  letter-spacing: .3px; vertical-align: middle;
}
.upgrade-lead { margin: 0 0 12px; color: #495057; font-size: 13px; line-height: 1.6; }
.upgrade-feats { margin: 0 0 20px; padding-left: 18px; color: #495057; font-size: 13px; line-height: 1.9; }
.btn-ghost {
  height: 34px; padding: 0 16px; border-radius: 6px; border: 1px solid #dee2e6; background: #fff;
  color: #495057; font-size: 13px; cursor: pointer; font-family: inherit;
}
.btn-primary {
  height: 34px; padding: 0 16px; border-radius: 6px; border: 0; background: #7950f2; color: #fff;
  font-size: 13px; font-weight: 600; text-decoration: none; display: inline-flex; align-items: center;
  cursor: pointer; font-family: inherit;
}
.btn-primary:hover { background: #5f3dc4; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 4px; }