/* --- Designer Pass: Premium Visual System (Cobalt + Rose Gold) --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Poppins:wght@600;700;800&display=swap');

:root{
  --cobalt:#0047ab;
  --cobalt-900:#07327a;
  --cobalt-100:#eef3ff;
  --rose:#b76e79;
  --ink:#0a0a0a;
  --muted:#475569;
  --line:#e2e8f0;
  --bg:#ffffff;
  --card:#ffffff;
  --soft:#f6f8fb;
  --shadow-lg: 0 30px 60px rgba(7,50,122,.15), 0 10px 30px rgba(7,50,122,.10);
  --shadow-md: 0 16px 28px rgba(7,50,122,.12), 0 6px 18px rgba(7,50,122,.08);
  --shadow-sm: 0 6px 14px rgba(7,50,122,.10), 0 2px 6px rgba(7,50,122,.06);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color:var(--ink);
  background:
    radial-gradient(1200px 500px at 50% -200px, rgba(183,110,121,.10), transparent 70%),
    linear-gradient(180deg, #fafcff 0%, #ffffff 50%);
  line-height:1.65;
}

/* Header */
header{position:sticky; top:0; z-index:60; background:linear-gradient(180deg,var(--cobalt) 0%, var(--cobalt-900) 100%); color:#fff; box-shadow:var(--shadow-sm)}
header .wrap{max-width:1180px; margin:0 auto; padding:16px 24px; display:flex; align-items:center; justify-content:space-between}
.brand{display:flex; align-items:center; gap:14px; font-family:Poppins, sans-serif; font-weight:800; letter-spacing:.2px}
.brand img{height:64px; width:auto; filter: drop-shadow(0 4px 10px rgba(0,0,0,.25));}
.nav a{margin-left:22px; font-weight:600; color:#fff; opacity:.92; transition:opacity .2s, color .2s}
.nav a:hover{opacity:1; color:var(--rose)}

/* Hero */
.hero{
  padding:110px 24px 90px;
  text-align:center;
  background:
    radial-gradient(700px 280px at 50% 0%, rgba(0,71,171,.10), transparent 70%),
    linear-gradient(180deg,#f6f9ff 0%, #ffffff 70%);
  border-bottom: 1px solid #eef2ff;
}
.hero h1{
  font-family:Poppins, sans-serif;
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  line-height:1.08;
  margin:0 0 14px;
  color:var(--cobalt);
  letter-spacing:.2px;
  text-shadow: 0 1px 0 rgba(255,255,255,.8);
}
.hero p{color:var(--muted); font-size: clamp(1.05rem, 1.6vw, 1.2rem); margin:0 0 26px}
.btn{
  display:inline-block;
  padding:14px 26px;
  border-radius:14px;
  border:0;
  background: linear-gradient(180deg, var(--cobalt) 0%, #0a4fc7 100%);
  color:#fff;
  font-weight:800;
  letter-spacing:.2px;
  box-shadow: var(--shadow-md);
  transition: transform .06s ease, box-shadow .2s ease, filter .2s ease;
}
.btn:hover{transform: translateY(-2px); box-shadow: var(--shadow-lg); filter: saturate(1.05)}
.btn:active{transform: translateY(0); box-shadow: var(--shadow-sm)}
.btn-outline{
  background:#fff; color:var(--cobalt);
  border:2px solid var(--cobalt);
}

/* Containers & Cards */
.container{max-width:1180px; margin:0 auto; padding:34px 24px}
.card{
  border:1px solid #eaf0ff;
  border-radius:20px;
  padding:26px;
  background:
    linear-gradient(180deg,#ffffff 0%, #fbfdff 100%);
  box-shadow: var(--shadow-sm);
}

/* Footer */
.footer{
  border-top:1px solid #eef2ff;
  text-align:center;
  color:var(--muted);
  padding:34px 24px;
  background: linear-gradient(180deg,#ffffff 0%, #f9fbff 100%);
}

/* Calculator Module */
.calc-shell{
  border:1px solid #eaf0ff;
  border-radius:22px;
  background:
    linear-gradient(180deg,#ffffff 0%, #f7faff 100%);
  box-shadow: var(--shadow-md);
  padding:22px;
}
.calc-inner{display:grid; gap:26px}
@media (min-width: 980px){
  .calc-inner{grid-template-columns: 1.1fr .9fr; align-items:start}
}

.calc-total-box{
  background: linear-gradient(180deg,#ffffff 0%, #f3f8ff 100%);
  border: 2px solid var(--cobalt);
  border-radius:18px;
  text-align:center;
  padding:22px 20px;
  box-shadow: var(--shadow-sm);
}
.total-label{font-weight:800; font-size:1.05rem; color:var(--cobalt); margin-bottom:8px; letter-spacing:.2px}
.total-value{
  font-family:Poppins, sans-serif;
  font-size: clamp(2.2rem, 3vw, 3rem);
  font-weight:900;
  color:var(--cobalt);
  text-shadow: 0 1px 0 rgba(255,255,255,.85);
}

/* Sliders */
.slider-row{margin:18px 0}
.slider-head{display:flex; align-items:center; justify-content:space-between; margin-bottom:10px; font-weight:700; color:#0f172a}
.counter{font-variant-numeric: tabular-nums; color:var(--cobalt)}

.range{width:100%; appearance:none; height:12px; background:#e6edf9; border-radius:999px; outline:none; box-shadow: inset 0 1px 2px rgba(7,50,122,.08)}
.range::-webkit-slider-thumb{
  appearance:none; width:42px; height:42px; border-radius:50%;
  background: radial-gradient(circle at 30% 30%, #ffe7eb, #f8dadd);
  border:3px solid var(--cobalt);
  box-shadow: var(--shadow-sm);
  cursor:pointer; transition: transform .08s ease, box-shadow .2s ease;
}
.range::-webkit-slider-thumb:active{transform: scale(1.06); box-shadow: var(--shadow-md)}
.range::-moz-range-thumb{
  width:42px; height:42px; border-radius:50%;
  background: radial-gradient(circle at 30% 30%, #ffe7eb, #f8dadd);
  border:3px solid var(--cobalt);
  box-shadow: var(--shadow-sm);
  cursor:pointer;
}

/* Inputs & Actions */
.input{
  width:100%; height:54px; border:1px solid #eaf0ff; border-radius:12px;
  padding:12px 14px; font-size:16px; background:#fff;
  box-shadow: inset 0 1px 2px rgba(7,50,122,.04);
}
.input:focus{outline:2px solid #cbd9ff; border-color:#cbd9ff}
.actions{display:flex; gap:12px; flex-wrap:wrap; margin-top:16px}
.actions .btn{flex:1; min-width:180px}

/* Fine-tune headings */
h2{
  font-family:Poppins, sans-serif;
  font-weight:800;
  letter-spacing:.2px;
  color:#0f172a;
  margin:0 0 8px;
}

/* Improve general readability */
p{font-size:1.05rem}
footer a{color:var(--cobalt)}