@font-face{
  font-family:'Fira Sans Black';
  src:url('../fonts/FiraSans-Black.ttf') format('truetype');
  font-weight:900; font-style:normal; font-display:swap;
}
@font-face{
  font-family:'Inter SemiBold';
  src:url('../fonts/Inter-SemiBold.ttf') format('truetype');
  font-weight:600; font-style:normal; font-display:swap;
}
@font-face{
  font-family:'Inter Medium';
  src:url('../fonts/Inter-Medium.ttf') format('truetype');
  font-weight:500; font-style:normal; font-display:swap;
}

:root{
  --ink:#000743;
  --ink-deep:#00031f;
  --mist:#D6F3FF;
  --paper:#F9FBFF;
  --bloom:#F1B7F2;
  --grey1:#ECEFF6;
  --grey2:#D9DAE2;
  --grey3:#8E90A2;
  --grey4:#53546F;
  --green:#008447;
  --red:#CF2141;

  --r-sm:10px;
  --r-md:18px;
  --r-lg:28px;
  --r-pill:999px;

  --ease-snap:cubic-bezier(1,0,0,1);
  --ease-smooth:cubic-bezier(.5,0,0,1);

  --fs-display:clamp(2.1rem,5vw,3.6rem);
  --fs-h2:clamp(1.15rem,2vw,1.5rem);
  --fs-body:1rem;
  --fs-small:.82rem;
  --fs-eyebrow:.78rem;
}

*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }
body{
  background:radial-gradient(120% 140% at 50% -10%, #001066 0%, var(--ink) 45%, var(--ink-deep) 100%);
  color:var(--paper);
  font-family:'Inter Medium', system-ui, sans-serif;
  font-weight:500;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{ font-family:'Fira Sans Black', system-ui, sans-serif; font-weight:900; letter-spacing:-0.01em; line-height:1; margin:0; text-wrap:balance; }
p{ margin:0; line-height:1.5; }
button{ font-family:inherit; cursor:pointer; }
a{ color:inherit; text-decoration:none; }
:focus-visible{ outline:2px solid var(--bloom); outline-offset:3px; border-radius:6px; }

.subhead{ font-family:'Inter SemiBold', system-ui, sans-serif; font-weight:600; letter-spacing:-0.01em; }
.eyebrow{
  font-family:'Inter SemiBold', system-ui, sans-serif;
  font-size:var(--fs-eyebrow);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--mist);
  opacity:.72;
}

#app{ position:relative; min-height:100vh; display:flex; flex-direction:column; }

/* ---------- shared topbar ---------- */
.topbar{
  position:sticky; top:0; z-index:20;
  display:flex; align-items:center; justify-content:space-between;
  padding:18px clamp(16px,4vw,40px);
  background:linear-gradient(180deg, rgba(0,7,67,.92) 0%, rgba(0,7,67,.55) 70%, transparent 100%);
  backdrop-filter:blur(6px);
  gap:16px;
}
.topbar-left{ display:flex; align-items:center; gap:18px; }
.brand{ display:flex; align-items:center; gap:10px; }
.brand img{ height:22px; width:auto; display:block; }

.back-btn{
  display:inline-flex; align-items:center; gap:8px;
  background:none; border:1px solid rgba(214,243,255,.3); color:var(--mist);
  padding:9px 16px 9px 12px; border-radius:var(--r-pill); font-family:'Inter SemiBold'; font-size:.85rem;
  transition:background .2s var(--ease-snap), border-color .2s var(--ease-snap);
}
.back-btn:hover{ background:rgba(214,243,255,.1); border-color:var(--mist); }
.back-btn svg{ width:16px; height:16px; stroke:currentColor; fill:none; stroke-width:2.4; stroke-linecap:round; stroke-linejoin:round; }

.lang-toggle{
  display:flex; background:rgba(214,243,255,.08); border:1px solid rgba(214,243,255,.22);
  border-radius:var(--r-pill); padding:3px; gap:2px;
}
.lang-toggle button{
  border:none; background:transparent; color:var(--mist);
  font-family:'Inter SemiBold', system-ui, sans-serif; font-size:.78rem;
  padding:6px 14px; border-radius:var(--r-pill);
  transition:background .25s var(--ease-smooth), color .25s var(--ease-smooth);
}
.lang-toggle button.active{ background:var(--mist); color:var(--ink); }
.lang-toggle button:not(.active):hover{ background:rgba(214,243,255,.16); }

main{ flex:1; }
footer.appfoot{ text-align:center; padding:18px; font-size:.72rem; color:var(--grey3); }

/* ---------- generic page shell ---------- */
.page{ max-width:1180px; margin:0 auto; padding:clamp(20px,4vw,40px) clamp(16px,4vw,40px) 120px; }
.page-hero{ text-align:center; max-width:720px; margin:0 auto 48px; }
.page-hero h1{ font-size:var(--fs-display); margin-top:14px; }
.page-hero h1 em{ font-style:italic; color:var(--mist); font-family:inherit; }
.page-hero p{ margin-top:16px; font-size:1.05rem; color:var(--mist); opacity:.85; }

/* ---------- choice cards (landing / submenu) ---------- */
.choice-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:24px; max-width:920px; margin:0 auto; }
.choice-card{
  display:block; text-align:left; padding:32px 28px; border-radius:var(--r-lg);
  background:rgba(214,243,255,.06); border:1px solid rgba(214,243,255,.22);
  transition:background .25s var(--ease-snap), border-color .25s var(--ease-snap), transform .25s var(--ease-snap), box-shadow .25s var(--ease-snap);
}
.choice-card:hover, .choice-card:focus-visible{
  border-color:var(--bloom); background:rgba(241,183,242,.08);
  transform:translateY(-4px); box-shadow:0 16px 40px rgba(241,183,242,.14);
}
.choice-card .card-icon{ width:44px; height:44px; stroke:var(--mist); fill:none; stroke-width:2; margin-bottom:20px; }
.choice-card:hover .card-icon{ stroke:var(--bloom); }
.choice-card h2{ font-size:1.4rem; }
.choice-card p{ margin-top:10px; font-size:.92rem; color:var(--mist); opacity:.82; }
.choice-card .card-cta{ margin-top:20px; display:inline-flex; align-items:center; gap:8px; font-family:'Inter SemiBold'; font-size:.85rem; color:var(--bloom); }
.choice-card .card-cta svg{ width:14px; height:14px; stroke:currentColor; fill:none; stroke-width:2.4; stroke-linecap:round; stroke-linejoin:round; transition:transform .25s var(--ease-snap); }
.choice-card:hover .card-cta svg{ transform:translateX(3px); }

/* ---------- panel / box ---------- */
.box{
  background:rgba(214,243,255,.06); border:1px solid rgba(214,243,255,.2);
  border-radius:var(--r-lg); padding:24px clamp(20px,3vw,32px);
}
.box + .box{ margin-top:20px; }
.box-title{ font-family:'Inter SemiBold'; font-size:.8rem; letter-spacing:.08em; text-transform:uppercase; color:var(--mist); opacity:.7; margin-bottom:16px; }

/* ---------- stat tiles ---------- */
.stat-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(160px,1fr)); gap:1px; background:rgba(214,243,255,.16); border:1px solid rgba(214,243,255,.2); border-radius:var(--r-lg); overflow:hidden; margin-bottom:28px; }
.stat-tile{ background:rgba(0,7,67,.55); padding:22px 18px; }
.stat-tile .stat-label{ font-family:'Inter SemiBold'; font-size:.68rem; letter-spacing:.08em; text-transform:uppercase; color:var(--mist); opacity:.65; }
.stat-tile .stat-value{ font-family:'Fira Sans Black'; font-size:clamp(1.3rem,2.6vw,1.7rem); margin-top:8px; }
.stat-tile .stat-value.positive{ color:var(--green); }
.stat-tile .stat-sub{ font-size:.76rem; color:var(--grey3); margin-top:4px; }

/* ---------- form fields ---------- */
.field{ display:flex; align-items:center; justify-content:space-between; gap:16px; padding:14px 0; border-bottom:1px solid rgba(214,243,255,.14); }
.field:last-child{ border-bottom:none; }
.field label{ font-size:.9rem; color:var(--mist); flex:1 1 auto; }
.field-input{ display:flex; align-items:center; gap:6px; flex:0 0 auto; }
.field input[type=number], .field input[type=text]{
  width:130px; background:rgba(0,7,67,.5); border:1px solid rgba(214,243,255,.3); color:var(--paper);
  font-family:'Inter SemiBold'; font-size:.95rem; padding:9px 12px; border-radius:var(--r-sm); text-align:right;
}
.field input[type=number]:focus, .field input[type=text]:focus{ border-color:var(--bloom); }
.field select{
  background:rgba(0,7,67,.5); border:1px solid rgba(214,243,255,.3); color:var(--paper);
  font-family:'Inter SemiBold'; font-size:.9rem; padding:9px 12px; border-radius:var(--r-sm);
}
.field .unit{ font-size:.8rem; color:var(--grey3); }

.field input[type=range]{
  flex:1 1 auto; -webkit-appearance:none; appearance:none; height:4px; border-radius:var(--r-pill);
  background:rgba(214,243,255,.2); outline:none;
}
.field input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none; width:18px; height:18px; border-radius:50%; background:var(--mist);
  border:3px solid var(--ink); cursor:pointer;
}
.field input[type=range]::-moz-range-thumb{
  width:18px; height:18px; border-radius:50%; background:var(--mist); border:3px solid var(--ink); cursor:pointer; border:none;
}
.range-row{ display:flex; flex-direction:column; gap:8px; width:100%; padding:14px 0; border-bottom:1px solid rgba(214,243,255,.14); }
.range-row-head{ display:flex; justify-content:space-between; align-items:baseline; }
.range-row-head label{ font-size:.9rem; color:var(--mist); }
.range-row-head .range-value{ font-family:'Inter SemiBold'; }
.range-minmax{ display:flex; justify-content:space-between; font-size:.7rem; color:var(--grey3); }

/* ---------- preset chips ---------- */
.preset-row{ display:flex; flex-wrap:wrap; gap:8px; padding:4px 0 14px; }
.preset-btn{
  background:rgba(214,243,255,.08); border:1px solid rgba(214,243,255,.25); color:var(--mist);
  font-family:'Inter SemiBold'; font-size:.76rem; padding:7px 12px; border-radius:var(--r-pill);
  transition:background .2s var(--ease-snap), border-color .2s var(--ease-snap), color .2s var(--ease-snap);
}
.preset-btn:hover{ border-color:var(--mist); }
.preset-btn.active{ background:var(--mist); color:var(--ink); border-color:var(--mist); }

/* ---------- checkbox / toggle ---------- */
.check-row{ display:flex; align-items:center; gap:10px; font-size:.88rem; color:var(--mist); margin-top:18px; }
.check-row input[type=checkbox]{ width:18px; height:18px; accent-color:var(--bloom); cursor:pointer; flex:0 0 auto; }

.module-detail{ margin-top:20px; }
.module-detail-head{ display:flex; align-items:baseline; justify-content:space-between; gap:12px; margin-bottom:16px; }
.module-detail-head h3{ font-size:1.15rem; }

/* ---------- result rows ---------- */
.result-row{ display:flex; justify-content:space-between; align-items:baseline; padding:10px 0; font-size:.92rem; border-bottom:1px solid rgba(214,243,255,.1); gap:16px; }
.result-row:last-child{ border-bottom:none; }
.result-row .amount{ font-family:'Inter SemiBold'; white-space:nowrap; }
.result-row .amount.negative{ color:var(--red); }
.result-row .amount.positive{ color:var(--green); }
.result-row .amount.info{ color:var(--mist); opacity:.85; }
.result-total{ display:flex; justify-content:space-between; align-items:baseline; margin-top:16px; padding-top:16px; border-top:1px solid rgba(214,243,255,.22); gap:16px; }
.result-total .amount{ font-family:'Fira Sans Black'; font-size:1.5rem; color:var(--green); white-space:nowrap; }
.result-total .amount.negative{ color:var(--red); }
.result-total.grand{ margin-top:20px; padding:16px 18px; background:rgba(0,132,71,.1); border:1px solid rgba(0,132,71,.4); border-radius:var(--r-md); }
.result-total.grand span:first-child{ font-family:'Inter SemiBold'; }
.result-total.grand .amount{ font-size:1.7rem; }

/* ---------- sticky column ---------- */
.sticky-col{ position:sticky; top:100px; align-self:start; }

/* ---------- two column layout ---------- */
.split{ display:grid; grid-template-columns:minmax(240px,340px) 1fr; gap:clamp(20px,4vw,40px); align-items:start; }
@media (max-width:760px){ .split{ grid-template-columns:1fr; } .sticky-col{ position:static; } }