:root{
  --bg:#f4f7fa;
  --card:#ffffff;
  --text:#102234;
  --muted:#607080;
  --line:#dbe4ec;
  --blue:#0f4c81;
  --blue2:#1976b8;
  --soft:#eaf3fa;
  --ok:#0b6b4b;
  --shadow:0 10px 30px rgba(15,44,68,.07);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.55;
}
button,input,select{font:inherit}
button{cursor:pointer}
.container{width:min(1180px,calc(100% - 32px));margin:0 auto}
.site-header{
  position:sticky;top:0;z-index:20;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;min-height:66px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:800;font-size:1.2rem}
.brand-mark{
  width:34px;height:34px;border-radius:9px;background:var(--blue);
  color:#fff;display:grid;place-items:center;font-size:1.15rem;
}
.top-nav{display:flex;gap:22px}
.top-nav a{color:var(--muted);text-decoration:none;font-weight:650}
.top-nav a:hover{color:var(--blue)}
.hero{
  background:
    radial-gradient(circle at 85% 10%, rgba(25,118,184,.16), transparent 28%),
    linear-gradient(180deg,#fff 0%,#f4f7fa 100%);
  border-bottom:1px solid var(--line);
}
.hero-inner{padding:78px 0 62px}
.eyebrow,.section-kicker{font-size:.76rem;letter-spacing:.14em;font-weight:800;color:var(--blue)}
h1{font-size:clamp(2.3rem,5vw,4.6rem);line-height:1.02;margin:10px 0 16px;letter-spacing:-.045em}
.lead{max-width:760px;font-size:1.16rem;color:var(--muted);margin:0 0 26px}
.smart-box{
  max-width:900px;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow);border-radius:18px;padding:18px;
}
.smart-box>label{display:block;font-weight:750;margin-bottom:8px}
.smart-row{display:flex;gap:10px}
.smart-row input{flex:1}
input,select{
  width:100%;border:1px solid #cbd7e2;background:#fff;
  border-radius:10px;padding:11px 12px;color:var(--text);outline:none;
}
input:focus,select:focus{border-color:var(--blue2);box-shadow:0 0 0 3px rgba(25,118,184,.1)}
button{
  border:0;border-radius:10px;padding:11px 16px;font-weight:750;
  background:var(--blue);color:#fff;
}
button:hover{background:#0c406c}
button.secondary{background:#e7eef5;color:#24445e}
.smart-result{min-height:24px;margin-top:10px;font-weight:700;color:var(--ok)}
.hero-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.chip{background:#fff;color:var(--blue);border:1px solid var(--line);padding:8px 11px}
.section{padding:56px 0}
.section-heading{display:flex;justify-content:space-between;align-items:end;gap:28px;margin-bottom:22px}
.section-heading h2{font-size:2rem;margin:4px 0 0}
.section-heading p{margin:0;color:var(--muted);max-width:480px}
.tool-card{
  background:var(--card);border:1px solid var(--line);border-radius:16px;
  box-shadow:0 6px 20px rgba(15,44,68,.04);padding:20px;
}
.tool-card h3{margin:0 0 5px;font-size:1.15rem}
.tool-card p{margin:0 0 16px;color:var(--muted);font-size:.94rem}
.feature-card{padding:24px}
.tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.field label{display:block;margin-bottom:5px;font-size:.82rem;font-weight:700;color:#405468}
.result-panel{
  margin-top:16px;padding:18px;border-radius:12px;background:var(--soft);
  display:flex;justify-content:space-between;align-items:center;gap:20px;
}
.result-panel span{color:var(--muted)}
.result-panel strong{font-size:1.35rem}
.tool-actions{display:flex;gap:8px}
.mini-result{
  margin-top:12px;min-height:22px;padding:10px 12px;background:#f7fafc;
  border:1px dashed #cfdae4;border-radius:10px;color:#284458;font-size:.92rem;
}
.info-box{
  padding:28px;border-radius:18px;background:#102b43;color:#fff;
}
.info-box h2{margin-top:0}
.info-box p{color:#dbe8f2;max-width:900px;margin-bottom:0}
.site-footer{border-top:1px solid var(--line);background:#fff}
.footer-row{display:flex;justify-content:space-between;gap:20px;padding:24px 0;color:var(--muted);font-size:.9rem}
@media (max-width:950px){
  .tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:650px){
  .top-nav{display:none}
  .hero-inner{padding:52px 0 42px}
  .smart-row{flex-direction:column}
  .tool-grid,.grid-2,.grid-4{grid-template-columns:1fr}
  .section-heading{align-items:start;flex-direction:column}
  .footer-row{flex-direction:column}
}


/* Domenii inginerești */
.domain-nav{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:12px;
  margin:0 0 34px;
}
.domain-link{
  display:flex;
  flex-direction:column;
  gap:2px;
  min-height:132px;
  padding:18px;
  text-decoration:none;
  color:var(--text);
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  box-shadow:0 6px 20px rgba(15,44,68,.04);
  transition:transform .15s ease,border-color .15s ease,box-shadow .15s ease;
}
.domain-link:hover{
  transform:translateY(-2px);
  border-color:#b6cadb;
  box-shadow:0 10px 25px rgba(15,44,68,.08);
}
.domain-icon{
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  margin-bottom:7px;
  border-radius:10px;
  background:var(--soft);
  color:var(--blue);
  font-size:1.3rem;
  font-weight:800;
}
.domain-link strong{font-size:1.02rem}
.domain-link small{color:var(--muted);line-height:1.35}
.domain-section{
  scroll-margin-top:88px;
  margin-top:42px;
  padding-top:4px;
}
.domain-heading{
  display:flex;
  justify-content:space-between;
  align-items:end;
  gap:28px;
  margin-bottom:16px;
  padding-bottom:12px;
  border-bottom:1px solid var(--line);
}
.domain-heading h3{
  margin:3px 0 0;
  font-size:1.55rem;
  letter-spacing:-.02em;
}
.domain-heading p{
  margin:0;
  max-width:520px;
  color:var(--muted);
  font-size:.94rem;
}
@media (max-width:950px){
  .domain-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:650px){
  .domain-nav{grid-template-columns:1fr}
  .domain-link{min-height:auto}
  .domain-heading{align-items:start;flex-direction:column;gap:8px}
}


/* Versiunea 1.2 — delimitare mai clară pentru meniul de domenii */
.domain-nav{
  gap:16px;
  margin-top:6px;
  margin-bottom:40px;
}
.domain-nav a,
.domain-link,
.domain-link:link,
.domain-link:visited,
.domain-link:hover,
.domain-link:active{
  text-decoration:none !important;
}
.domain-link{
  position:relative;
  min-height:118px;
  padding:18px 18px 17px 18px;
  border:1px solid #cfdbe6;
  border-radius:14px;
  background:#fff;
}
.domain-link::after{
  content:"";
  position:absolute;
  left:18px;
  right:18px;
  bottom:0;
  height:3px;
  border-radius:3px 3px 0 0;
  background:var(--blue);
  opacity:.8;
}
.domain-link + .domain-link{
  margin-left:0;
}
.domain-link strong{
  display:block;
  margin-top:2px;
  margin-bottom:3px;
  line-height:1.25;
  text-decoration:none !important;
}
.domain-link small{
  display:block;
  text-decoration:none !important;
}
.domain-link:hover{
  background:#f8fbfd;
  border-color:#aac3d8;
}
.domain-link:focus-visible{
  outline:3px solid rgba(25,118,184,.22);
  outline-offset:3px;
}
@media (max-width:950px){
  .domain-nav{gap:14px}
}
@media (max-width:650px){
  .domain-nav{gap:12px}
}

.domain-nav-wrap{
  margin-top:4px;
}
.domain-nav-title{
  margin:0 0 10px 2px;
  font-size:.78rem;
  font-weight:800;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:#526b80;
}


/* Versiunea 1.3 — mai multe domenii */
.grid-3{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:10px;
}
.domain-nav{
  grid-template-columns:repeat(5,minmax(0,1fr));
}
.domain-link{
  min-height:132px;
}
.domain-link small{
  font-size:.79rem;
}
@media (max-width:1100px){
  .domain-nav{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width:800px){
  .domain-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-3{grid-template-columns:1fr}
}
@media (max-width:520px){
  .domain-nav{grid-template-columns:1fr}
}


/* Versiunea 1.4 — logo/favion și Open Graph */
.brand{
  gap:12px;
}
.brand-mark-image{
  width:38px;
  height:38px;
  display:block;
  object-fit:contain;
  border-radius:10px;
  flex:0 0 38px;
  box-shadow:0 4px 10px rgba(15,44,68,.08);
}


/* Versiunea 1.5 — polish vizual */
:root{
  --radius:16px;
  --radius-sm:11px;
  --shadow-soft:0 8px 28px rgba(15,44,68,.06);
  --shadow-hover:0 14px 36px rgba(15,44,68,.10);
}
body{
  background:
    linear-gradient(180deg,#f8fafc 0,#f4f7fa 18rem,#f4f7fa 100%);
}
.site-header{
  box-shadow:0 1px 10px rgba(15,44,68,.035);
}
.nav-wrap{min-height:70px}
.brand{font-size:1.24rem;letter-spacing:-.018em}
.brand-mark-image{
  width:40px;
  height:40px;
  flex-basis:40px;
  border-radius:11px;
  box-shadow:0 5px 14px rgba(15,76,129,.14);
}
.top-nav a{
  position:relative;
  padding:8px 4px;
}
.top-nav a::after{
  content:"";
  position:absolute;
  left:4px;right:4px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--blue2);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .18s ease;
}
.top-nav a:hover::after{transform:scaleX(1)}

.hero-inner{padding:72px 0 58px}
.hero .lead{max-width:800px}
.smart-box{
  border-color:#d3e0ea;
  box-shadow:0 16px 42px rgba(15,44,68,.08);
}
.smart-row button{
  min-width:132px;
}
.hero-trust{
  display:flex;
  flex-wrap:wrap;
  gap:10px 18px;
  align-items:center;
  margin-top:18px;
  color:#65798b;
  font-size:.87rem;
}
.hero-trust span{
  display:inline-flex;
  align-items:center;
  gap:5px;
}
.hero-trust span + span::before{
  content:"";
  width:4px;height:4px;border-radius:50%;
  background:#9eb4c6;
  margin-right:8px;
}
.hero-trust strong{color:var(--text)}

.section{padding:62px 0}
.section-heading{margin-bottom:26px}
.section-heading h2{letter-spacing:-.025em}
.feature-card{
  border-color:#cfdeea;
  box-shadow:var(--shadow-soft);
}
.result-panel{
  border:1px solid #d6e6f2;
  background:linear-gradient(135deg,#edf6fc,#f7fbfe);
}
.result-panel strong{
  color:#0b548f;
  letter-spacing:-.015em;
}

.domain-nav{
  gap:14px;
  margin-bottom:46px;
}
.domain-link{
  min-height:128px;
  border-color:#d6e1ea;
  box-shadow:var(--shadow-soft);
  overflow:hidden;
}
.domain-link::after{
  height:4px;
  opacity:.72;
}
.domain-link:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-hover);
}
.domain-icon{
  width:40px;height:40px;
  border:1px solid #d7e7f3;
  background:#f0f7fc;
}
.domain-section{
  margin-top:52px;
  scroll-margin-top:88px;
}
.domain-heading{
  margin-bottom:18px;
}
.domain-heading h3{
  font-size:1.65rem;
}
.tool-grid{
  align-items:stretch;
}
.tool-card{
  display:flex;
  flex-direction:column;
  min-height:100%;
  border-color:#d9e3eb;
  border-radius:var(--radius);
  box-shadow:var(--shadow-soft);
  transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease;
}
.tool-card:hover{
  transform:translateY(-2px);
  border-color:#c6d8e6;
  box-shadow:var(--shadow-hover);
}
.tool-card h3{
  font-size:1.12rem;
  letter-spacing:-.012em;
}
.tool-card p{
  min-height:44px;
}
.tool-card button[data-action]{
  margin-top:auto;
  align-self:flex-start;
  min-width:126px;
}
.tool-actions{
  margin-top:auto;
}
.mini-result{
  position:relative;
  margin-top:14px;
  padding:13px 14px 13px 16px;
  border:1px solid #d7e5ef;
  border-left:4px solid #2a79b6;
  background:#f7fbfd;
  color:#1f415b;
  font-weight:650;
  min-height:48px;
}
.mini-result:empty::before{
  content:"Rezultatul va apărea aici";
  color:#8a9aa8;
  font-weight:500;
}
.back-domains{
  display:inline-block;
  margin-top:14px;
  color:#6c8192;
  text-decoration:none;
  font-size:.82rem;
  font-weight:700;
}
.back-domains:hover{color:var(--blue)}

.field label{
  font-size:.8rem;
  letter-spacing:.01em;
}
input,select{
  transition:border-color .15s ease,box-shadow .15s ease,background .15s ease;
}
input:hover,select:hover{border-color:#b8cbd9}

.info-box{
  box-shadow:0 18px 42px rgba(16,43,67,.12);
}
.site-footer{
  margin-top:18px;
}
.footer-row{padding:28px 0}

@media (max-width:950px){
  .tool-grid{gap:14px}
}
@media (max-width:650px){
  .container{width:min(100% - 24px,1180px)}
  .hero-inner{padding:46px 0 38px}
  h1{font-size:clamp(2.15rem,12vw,3.3rem)}
  .hero-trust{gap:8px 12px}
  .hero-trust span + span::before{display:none}
  .section{padding:46px 0}
  .smart-box{padding:14px}
  .smart-row button{width:100%}
  .tool-card{padding:17px}
  .tool-card p{min-height:auto}
  .tool-card button[data-action],
  .tool-actions button{width:100%}
  .tool-actions{display:grid;grid-template-columns:1fr 1fr;width:100%}
  .result-panel{align-items:flex-start;flex-direction:column;gap:4px}
}


/* Versiunea 1.6 — rafinare funcțională */
.result-panel-actions{
  align-items:center;
}
.result-panel-actions > div:first-child{
  display:flex;
  flex-direction:column;
  gap:3px;
}
.result-actions,
.calc-toolbar{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.compact-btn{
  padding:8px 11px;
  font-size:.8rem;
  min-width:auto !important;
  width:auto !important;
}
.calc-toolbar{
  margin-top:10px;
}
.calc-toolbar .compact-btn{
  flex:0 0 auto;
}
.smart-help{
  margin-top:8px;
  color:#7a8b99;
  font-size:.8rem;
}
.smart-help code{
  padding:2px 5px;
  border:1px solid #d9e5ee;
  border-radius:5px;
  background:#f7fafc;
  color:#35536c;
}
.copy-feedback{
  color:#0b6b4b !important;
  border-color:#b8decf !important;
  background:#eef9f5 !important;
}
.tool-card input.input-error,
.tool-card select.input-error,
.feature-card input.input-error,
.feature-card select.input-error{
  border-color:#c84b4b;
  box-shadow:0 0 0 3px rgba(200,75,75,.09);
}
@media (max-width:650px){
  .result-panel-actions{
    align-items:stretch;
  }
  .result-actions{
    display:grid;
    grid-template-columns:1fr;
    width:100%;
  }
  .result-actions .compact-btn,
  .calc-toolbar .compact-btn{
    width:100% !important;
  }
  .calc-toolbar{
    display:grid;
    grid-template-columns:1fr;
  }
}


/* Versiunea 1.7 — instrumente avansate */
.advanced-tool{
  position:relative;
  border-top:3px solid #2a79b6;
}
.tool-badge{
  align-self:flex-start;
  margin:-4px 0 8px;
  padding:3px 7px;
  border-radius:999px;
  background:#eaf4fb;
  border:1px solid #cfe3f1;
  color:#0f5d97;
  font-size:.66rem;
  font-weight:850;
  letter-spacing:.08em;
}
.formula-note{
  margin:-4px 0 13px;
  padding:8px 10px;
  border-radius:8px;
  background:#f4f8fb;
  color:#456176;
  font-family:"Cambria Math","STIX Two Math",Georgia,serif;
  font-size:.86rem;
}
.assumption-note{
  margin-top:12px;
  padding-top:10px;
  border-top:1px solid #e1e9ef;
  color:#718491;
  font-size:.77rem;
  line-height:1.45;
}