:root{
  --bg:#0b0e13;
  --bg-soft:#10151d;
  --surface:#151b24;
  --surface-2:#1a2230;
  --surface-3:#0f141c;
  --border:#293342;
  --border-soft:#202936;
  --text:#f5f7fa;
  --muted:#9faaba;
  --muted-2:#758195;
  --accent:#f2b632;
  --accent-soft:#ffd77a;
  --accent-bg:rgba(242,182,50,.10);
  --danger:#ff7777;
  --danger-bg:rgba(255,119,119,.10);
  --whatsapp:#25d366;
  --shadow:0 18px 50px rgba(0,0,0,.24);
  --radius:18px;
}

*{box-sizing:border-box}
html{color-scheme:dark}
body{
  margin:0;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at 50% -12%,rgba(242,182,50,.08),transparent 28%),
    linear-gradient(180deg,#0c1016 0,#090c11 100%);
  min-height:100vh;
}
button,input{font:inherit}
button{cursor:pointer}
button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:3px;
}
.shell{width:min(1180px,calc(100% - 32px));margin:0 auto}

.site-header{
  border-bottom:1px solid var(--border-soft);
  background:rgba(11,14,19,.82);
  backdrop-filter:blur(14px);
}
.header-inner{
  min-height:132px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.brand-kicker,.section-label,.result-kicker{
  margin:0 0 7px;
  font-size:.72rem;
  font-weight:850;
  letter-spacing:.14em;
  color:var(--accent);
}
h1{margin:0;font-size:clamp(1.9rem,4vw,3rem);line-height:1.06;letter-spacing:-.035em}
.subtitle{margin:9px 0 0;color:var(--muted);font-size:.98rem}
.header-badge{
  flex:0 0 auto;
  display:grid;
  place-items:center;
  width:70px;height:70px;
  border:1px solid rgba(242,182,50,.34);
  background:var(--accent-bg);
  border-radius:20px;
  color:var(--accent-soft);
  font-weight:900;
  letter-spacing:.04em;
}

.calculator-layout{
  display:grid;
  grid-template-columns:minmax(0,1.08fr) minmax(360px,.92fr);
  gap:22px;
  align-items:start;
  padding:28px 0 0;
}
.form-column,.result-column{display:grid;gap:16px}
.result-column{position:sticky;top:16px}

.step-card,.result-card,.explain-card,.history-card{
  border:1px solid var(--border);
  background:linear-gradient(180deg,rgba(23,30,41,.98),rgba(18,24,33,.98));
  box-shadow:var(--shadow);
  border-radius:var(--radius);
}
.step-card{padding:20px}
.step-title{display:flex;gap:13px;align-items:flex-start;margin-bottom:17px}
.step-number{
  flex:0 0 auto;
  width:34px;height:34px;
  border-radius:50%;
  display:grid;place-items:center;
  background:var(--accent);
  color:#221804;
  font-weight:950;
  box-shadow:0 0 0 5px rgba(242,182,50,.08);
}
.step-title h2,.history-head h2,.result-head h2{margin:0;font-size:1.08rem}
.step-title p{margin:5px 0 0;color:var(--muted);font-size:.9rem;line-height:1.45}

.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  min-height:44px;
  padding:0 14px;
  border:1px solid var(--border);
  border-radius:11px;
  background:var(--surface-2);
  color:var(--text);
  font-weight:780;
  transition:.15s ease;
}
.chip:hover{border-color:#445166;transform:translateY(-1px)}
.chip.active{
  border-color:var(--accent);
  background:var(--accent-bg);
  color:var(--accent-soft);
  box-shadow:inset 0 0 0 1px rgba(242,182,50,.10);
}

.field{display:grid;gap:7px;margin-top:14px}
.field>span{color:var(--muted);font-size:.82rem;font-weight:750}
.input-wrap{position:relative}
.input-wrap input{
  width:100%;
  height:52px;
  padding:0 68px 0 14px;
  border:1px solid var(--border);
  border-radius:12px;
  background:var(--surface-3);
  color:var(--text);
  font-size:1.05rem;
  outline:none;
}
.input-wrap input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(242,182,50,.08)}
.input-wrap b{
  position:absolute;right:14px;top:50%;transform:translateY(-50%);
  color:var(--accent-soft);font-size:.9rem;
}
.hidden{display:none!important}

.inline-info{
  margin-top:14px;
  padding:11px 12px;
  border:1px solid var(--border-soft);
  border-radius:11px;
  background:rgba(255,255,255,.018);
  color:var(--muted);
  font-size:.84rem;
}
.inline-info strong{color:var(--text)}

.syringe-options{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}
.syringe-option{
  min-height:86px;
  padding:13px;
  text-align:left;
  display:grid;
  grid-template-columns:1fr auto;
  grid-template-areas:"ui ml" "sub sub";
  align-items:center;
  border:1px solid var(--border);
  border-radius:13px;
  background:var(--surface-2);
  color:var(--text);
}
.syringe-option strong{grid-area:ui;font-size:1.05rem}
.syringe-option span{grid-area:ml;color:var(--muted);font-size:.85rem}
.syringe-option small{grid-area:sub;color:var(--muted-2);margin-top:4px}
.syringe-option.active{
  border-color:var(--accent);
  background:var(--accent-bg);
}
.syringe-option.active strong{color:var(--accent-soft)}

.details-box{
  margin-top:13px;
  border-top:1px solid var(--border-soft);
  padding-top:13px;
}
.details-box summary{
  color:var(--text);
  font-weight:800;
  font-size:.9rem;
}
.details-content{padding-top:10px}
.details-content>div{
  display:flex;justify-content:space-between;gap:12px;
  padding:8px 0;
  border-bottom:1px solid var(--border-soft);
  color:var(--muted);
  font-size:.86rem;
}
.details-content>div strong{color:var(--text)}
.details-content p{color:var(--muted);font-size:.86rem;line-height:1.5;margin:12px 0 0}
.details-content p b{color:var(--text)}

.segmented{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:5px;
  padding:5px;
  margin-bottom:13px;
  border:1px solid var(--border);
  border-radius:12px;
  background:var(--surface-3);
}
.seg{
  min-height:40px;
  border:0;
  border-radius:9px;
  background:transparent;
  color:var(--muted);
  font-weight:850;
}
.seg.active{background:var(--accent);color:#201704}

.result-card{padding:20px;border-color:rgba(242,182,50,.27)}
.result-head{
  display:flex;justify-content:space-between;gap:12px;align-items:flex-start;
  padding-bottom:16px;border-bottom:1px solid var(--border-soft)
}
.status-dot{
  color:var(--muted-2);
  font-size:.7rem;
  white-space:nowrap;
}
.status-dot::before{
  content:"";
  display:inline-block;
  width:7px;height:7px;border-radius:50%;
  background:#61d38c;
  margin-right:6px;
  box-shadow:0 0 0 4px rgba(97,211,140,.08);
}
.result-empty{padding:56px 15px;text-align:center;color:var(--muted);line-height:1.5}
.pull-block{text-align:center;padding:22px 0 4px}
.pull-block>span{color:var(--muted);font-size:.77rem;font-weight:850;letter-spacing:.12em}
.pull-block>div{display:flex;justify-content:center;align-items:baseline;gap:8px;margin-top:4px}
.pull-block strong{
  font-size:clamp(4rem,10vw,6.4rem);
  line-height:.9;
  letter-spacing:-.06em;
  color:var(--accent);
  font-weight:950;
}
.pull-block b{font-size:1.08rem;color:var(--accent-soft)}

.alert{
  margin:12px 0 0;
  padding:11px 12px;
  border:1px solid rgba(255,119,119,.42);
  background:var(--danger-bg);
  color:#ffb7b7;
  border-radius:11px;
  font-size:.86rem;
}

.equivalents{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:15px}
.equivalents>div{
  padding:11px 9px;
  text-align:center;
  border:1px solid var(--border-soft);
  border-radius:11px;
  background:var(--surface-3);
}
.equivalents span{display:block;color:var(--muted-2);font-size:.7rem;text-transform:uppercase;letter-spacing:.06em}
.equivalents strong{display:block;margin-top:3px;color:var(--text);font-size:.9rem}
.equivalents strong b{font-size:1.02rem}

.syringe-panel{
  margin-top:18px;
  padding:15px 14px 16px;
  border:1px solid var(--border);
  border-radius:14px;
  background:#eef2f6;
  color:#161b22;
}
.syringe-panel-head{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:12px}
.syringe-panel-head span{font-size:.72rem;color:#626d79;text-transform:uppercase;letter-spacing:.06em;font-weight:800}
.syringe-panel-head strong{font-size:.82rem;color:#1c232d}
.syringe-body{display:flex;align-items:center;padding:16px 6px 34px}
.barrel{
  position:relative;
  flex:1;
  height:72px;
  border:2px solid #8b95a3;
  border-radius:6px 13px 13px 6px;
  background:linear-gradient(180deg,#fff,#e8edf2);
  box-shadow:inset 0 0 0 5px rgba(255,255,255,.55);
}
.needle{width:32px;height:2px;background:#89939f;position:relative}
.needle::after{
  content:"";
  position:absolute;right:-10px;top:-1px;
  width:10px;height:2px;background:#89939f;
}
.liquid{
  position:absolute;left:0;top:0;bottom:0;width:0;
  background:linear-gradient(90deg,rgba(242,182,50,.28),rgba(242,182,50,.60));
  border-radius:4px 0 0 4px;
  transition:width .18s ease;
}
.scale-layer{position:absolute;inset:0;pointer-events:none}
.tick-line{
  position:absolute;top:0;
  width:1px;height:16px;
  background:#3d4650;
  transform:translateX(-50%);
}
.tick-line.major{height:28px;width:2px;background:#202832}
.tick-number{
  position:absolute;top:78px;
  transform:translateX(-50%);
  font-size:10px;
  font-weight:800;
  color:#303945;
  white-space:nowrap;
}
.tick-number.first{transform:none}
.tick-number.last{transform:translateX(-100%)}
.dose-line{
  position:absolute;
  top:-8px;bottom:-8px;
  width:3px;
  background:#c88f05;
  box-shadow:0 0 0 2px rgba(242,182,50,.18);
  z-index:3;
  transition:left .18s ease;
}
.dose-line span{
  position:absolute;
  bottom:80px;left:50%;
  transform:translateX(-50%);
  padding:4px 7px;
  border-radius:7px;
  background:#1b2028;
  color:#fff;
  font-size:10px;
  font-weight:850;
  white-space:nowrap;
}
.dose-line span::after{
  content:"";
  position:absolute;left:50%;bottom:-4px;
  transform:translateX(-50%);
  border-left:4px solid transparent;border-right:4px solid transparent;border-top:4px solid #1b2028;
}
.scale-caption{margin-top:5px;color:#697380;font-size:.7rem;text-align:center}

.metrics{display:grid;grid-template-columns:1.2fr .8fr;gap:9px;margin-top:15px}
.metrics>div{
  padding:12px;
  border:1px solid var(--border-soft);
  border-radius:11px;
  background:var(--surface-3);
}
.metrics span,.metrics small{display:block;color:var(--muted-2);font-size:.72rem}
.metrics strong{display:block;margin:4px 0 2px;font-size:1rem}

.explain-card,.history-card{padding:17px}
.explain-card p{color:var(--muted);font-size:.88rem;line-height:1.55;margin:8px 0 0}
.explain-card strong{color:var(--text)}

.actions{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.btn{
  min-height:49px;
  border-radius:11px;
  border:1px solid var(--border);
  font-weight:850;
  color:var(--text);
  background:var(--surface-2);
}
.btn-primary{grid-column:1/-1;background:var(--accent);border-color:var(--accent);color:#201704}
.btn-whatsapp{background:rgba(37,211,102,.10);border-color:rgba(37,211,102,.35);color:#7cf0a7}
.btn-secondary{background:transparent}

.history-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}
.text-button{border:0;background:transparent;color:var(--accent);font-weight:800}
.history-list{display:grid;gap:8px;margin-top:12px}
.history-empty{color:var(--muted);font-size:.85rem}
.history-item{
  display:flex;justify-content:space-between;gap:12px;
  padding:10px 11px;
  border:1px solid var(--border-soft);
  border-radius:10px;
  background:var(--surface-3);
}
.history-item small{display:block;color:var(--muted-2);font-size:.74rem;margin-top:2px}
.history-item strong{color:var(--accent-soft);white-space:nowrap}

.site-footer{padding:30px 0 42px}
.footer-notice{
  display:flex;gap:12px;align-items:flex-start;
  padding:16px;
  border:1px solid rgba(242,182,50,.28);
  background:rgba(242,182,50,.055);
  border-radius:14px;
}
.footer-icon{
  flex:0 0 auto;
  width:24px;height:24px;
  display:grid;place-items:center;
  border-radius:50%;
  background:var(--accent);
  color:#211704;
  font-weight:950;
  font-family:Georgia,serif;
}
.footer-notice strong{font-size:.88rem}
.footer-notice p{margin:3px 0 0;color:var(--muted);font-size:.82rem;line-height:1.45}
.footer-brand{text-align:center;color:var(--muted-2);font-size:.75rem;margin:15px 0 0}

.toast{
  position:fixed;left:50%;bottom:18px;z-index:20;
  transform:translate(-50%,25px);
  opacity:0;pointer-events:none;
  background:#f4f6f8;color:#161a20;
  padding:10px 14px;border-radius:999px;
  font-weight:800;font-size:.84rem;
  transition:.18s ease;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

@media(max-width:900px){
  .calculator-layout{grid-template-columns:1fr}
  .result-column{position:static}
}
@media(max-width:620px){
  .shell{width:min(100% - 18px,680px)}
  .header-inner{min-height:112px}
  .header-badge{width:56px;height:56px;border-radius:16px}
  h1{font-size:1.75rem}
  .subtitle{font-size:.88rem}
  .calculator-layout{padding-top:14px;gap:12px}
  .form-column,.result-column{gap:12px}
  .step-card,.result-card,.explain-card,.history-card{border-radius:15px}
  .step-card,.result-card{padding:15px}
  .step-title{margin-bottom:14px}
  .syringe-options{grid-template-columns:1fr}
  .syringe-option{min-height:62px}
  .equivalents{grid-template-columns:repeat(3,1fr)}
  .equivalents>div{padding:9px 5px}
  .equivalents strong{font-size:.77rem}
  .equivalents strong b{font-size:.92rem}
  .metrics{grid-template-columns:1fr}
  .syringe-panel{padding:13px 8px 14px}
  .syringe-body{padding-left:1px;padding-right:1px}
  .tick-number{font-size:9px}
  .dose-line span{font-size:9px}
  .actions{grid-template-columns:1fr}
  .btn-primary{grid-column:auto}
}