/* LaCalc — Premium theme */
:root{
  --navy:#0a1830; --navy2:#10254a; --blue:#1d4ed8; --blue-lt:#3b82f6;
  --amber:#f59e0b; --ink:#0f1c2e; --muted:#5b6b82; --line:#e6ecf4;
  --bg:#f6f8fc; --card:#ffffff; --radius:16px;
  --shadow:0 10px 30px rgba(10,24,48,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;font-size:16px}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
/* NAV */
.nav{position:sticky;top:0;z-index:50;background:rgba(10,24,48,.96);backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,.08)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:1.25rem;letter-spacing:-.02em}
.logo:hover{text-decoration:none}
.logo-badge{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--blue-lt),var(--blue));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:1rem;box-shadow:0 4px 12px rgba(59,130,246,.4)}
.logo em{font-style:normal;color:var(--amber)}
.nav-links{display:flex;gap:26px}
.nav-links a{color:#c9d6ea;font-size:.93rem;font-weight:500}
.nav-links a:hover{color:#fff;text-decoration:none}
/* HERO */
.hero{background:radial-gradient(1200px 500px at 50% -10%,#1b3a75 0%,var(--navy) 60%);color:#fff;padding:72px 0 64px;text-align:center}
.hero h1{font-size:2.6rem;letter-spacing:-.03em;line-height:1.15;margin-bottom:14px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#fbbf24,#f59e0b);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:#b9c8e2;max-width:640px;margin:0 auto 28px;font-size:1.08rem}
.searchbar{max-width:560px;margin:0 auto;display:flex;background:#fff;border-radius:999px;padding:6px;box-shadow:0 12px 40px rgba(0,0,0,.25)}
.searchbar input{flex:1;border:0;outline:0;padding:12px 20px;font-size:1rem;border-radius:999px}
.searchbar button{border:0;background:var(--blue);color:#fff;font-weight:700;padding:12px 28px;border-radius:999px;cursor:pointer;font-size:1rem}
.searchbar button:hover{background:var(--blue-lt)}
.hero-stats{display:flex;gap:36px;justify-content:center;margin-top:30px;flex-wrap:wrap}
.hero-stats div{text-align:center}
.hero-stats b{display:block;font-size:1.5rem;color:#fff}
.hero-stats span{color:#8fa3c4;font-size:.85rem}
/* SECTIONS */
.section{padding:56px 0}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:22px}
.sec-head h2{font-size:1.6rem;letter-spacing:-.02em}
.sec-head a{font-size:.9rem;font-weight:600}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s;display:block;color:inherit}
a.card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(10,24,48,.12);text-decoration:none}
.card .ico{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.3rem;margin-bottom:14px;color:#fff;font-weight:700}
.card h3{font-size:1.05rem;margin-bottom:6px;letter-spacing:-.01em}
.card p{color:var(--muted);font-size:.9rem}
.cat-health{background:linear-gradient(135deg,#10b981,#059669)}
.cat-finance{background:linear-gradient(135deg,#1d4ed8,#1e40af)}
.cat-dev{background:linear-gradient(135deg,#8b5cf6,#6d28d9)}
.cat-edu{background:linear-gradient(135deg,#f59e0b,#d97706)}
.c-blue{background:linear-gradient(135deg,#38bdf8,#0284c7)}
.c-red{background:linear-gradient(135deg,#f87171,#dc2626)}
.c-indigo{background:linear-gradient(135deg,#818cf8,#4f46e5)}
.c-amber{background:linear-gradient(135deg,#fbbf24,#d97706)}
.c-green{background:linear-gradient(135deg,#4ade80,#16a34a)}
.c-emerald{background:linear-gradient(135deg,#34d399,#059669)}
.c-sky{background:linear-gradient(135deg,#7dd3fc,#0369a1)}
.c-slate{background:linear-gradient(135deg,#94a3b8,#475569)}
.c-violet{background:linear-gradient(135deg,#a78bfa,#7c3aed)}
.c-cyan{background:linear-gradient(135deg,#22d3ee,#0e7490)}
.c-pink{background:linear-gradient(135deg,#f472b6,#db2777)}
.c-orange{background:linear-gradient(135deg,#fb923c,#ea580c)}
/* TOOL PAGE */
.crumb{font-size:.85rem;color:var(--muted);padding:18px 0 0}
.crumb a{color:var(--muted)}
.tool-head{padding:26px 0 8px}
.tool-head h1{font-size:2.1rem;letter-spacing:-.025em;margin-bottom:10px}
.tool-head .lede{color:var(--muted);font-size:1.06rem;max-width:760px}
.calc{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:30px;margin:26px 0}
.calc h2{font-size:1.15rem;margin-bottom:18px}
.field{margin-bottom:16px}
.field label{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;border:1.5px solid var(--line);border-radius:10px;padding:12px 14px;font-size:1rem;font-family:inherit;background:#fbfcfe}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--blue-lt);box-shadow:0 0 0 3px rgba(59,130,246,.15)}
.field .hint{font-size:.82rem;color:var(--muted);margin-top:4px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.btn{display:inline-block;border:0;background:linear-gradient(135deg,var(--blue-lt),var(--blue));color:#fff;font-weight:700;font-size:1rem;padding:14px 34px;border-radius:12px;cursor:pointer;box-shadow:0 8px 20px rgba(29,78,216,.3)}
.btn:hover{filter:brightness(1.08)}
.btn-ghost{background:#eef3fb;color:var(--blue);box-shadow:none;border:1px solid var(--line)}
.result{display:none;margin-top:22px;background:linear-gradient(135deg,#f0f7ff,#e8f3ff);border:1px solid #cfe3ff;border-radius:14px;padding:22px}
.result.show{display:block;animation:pop .25s ease}
@keyframes pop{from{transform:scale(.97);opacity:.4}to{transform:scale(1);opacity:1}}
.result .big{font-size:2rem;font-weight:800;color:var(--navy);letter-spacing:-.02em}
.result .lbl{font-size:.85rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;font-weight:600}
.result table{width:100%;margin-top:12px;border-collapse:collapse;font-size:.95rem}
.result td{padding:8px 4px;border-top:1px solid #d5e6ff}
.result td:last-child{text-align:right;font-weight:700}
pre.out{background:#0a1830;color:#d7e6ff;border-radius:12px;padding:18px;overflow:auto;font-size:.88rem;margin-top:14px;white-space:pre-wrap;word-break:break-all}
.content{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:32px;margin:26px 0}
.content h2{font-size:1.35rem;margin:26px 0 12px;letter-spacing:-.015em}
.content h2:first-child{margin-top:0}
.content p,.content li{color:#33445e}
.content ul,.content ol{margin:10px 0 10px 22px}
.content code{background:#eef3fb;padding:2px 8px;border-radius:6px;font-size:.9em;color:var(--blue)}
.faq details{border:1px solid var(--line);border-radius:12px;margin-bottom:10px;background:#fff;overflow:hidden}
.faq summary{padding:16px 20px;font-weight:600;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';float:right;color:var(--blue);font-weight:800}
.faq details[open] summary::after{content:'–'}
.faq .a{padding:0 20px 18px;color:#33445e}
/* FOOTER */
footer{background:var(--navy);color:#93a6c6;padding:48px 0 28px;margin-top:40px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px;margin-bottom:30px}
.foot-grid h3{color:#fff;font-size:.95rem;margin-bottom:12px}
.foot-grid a{color:#93a6c6;font-size:.9rem;display:block;margin-bottom:8px}
.foot-grid a:hover{color:#fff}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;font-size:.85rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
/* RESPONSIVE */
@media(max-width:720px){
  .hero h1{font-size:1.9rem}
  .row2{grid-template-columns:1fr}
  .nav-links{display:none}
  .foot-grid{grid-template-columns:1fr 1fr}
  .tool-head h1{font-size:1.6rem}
  .calc,.content{padding:20px}
}

.cat-banner{margin:0 0 1.25rem;border-radius:14px;overflow:hidden;box-shadow:0 4px 14px rgba(10,30,60,.10)}
.cat-banner img{width:100%;height:190px;object-fit:cover;display:block}