@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap');

:root{
  --bg:#f4fbfa;
  --bg2:#e7faf6;
  --panel:#ffffff;
  --text:#071615;
  --muted:#3b5a57;
  --accent:#00b3a4;
  --accent-rgb: 0,179,164;
  --accent2:#34d399;
  --border: rgba(7, 22, 21, .10);
  --shadow: 0 10px 30px rgba(2, 6, 23, .08);
  --shadow2: 0 6px 16px rgba(2, 6, 23, .08);
  --radius: 16px;
  --radius2: 12px;
}

@media (prefers-color-scheme: dark){
  :root{
    --bg:#061210;
    --bg2:#081b18;
    --panel:#0b2320;
    --text:#e6fffb;
    --muted:#94d5cf;
    --accent:#2dd4bf;
    --accent-rgb: 45,212,191;
    --accent2:#34d399;
    --border: rgba(148, 213, 207, .18);
    --shadow: 0 10px 30px rgba(0,0,0,.35);
    --shadow2: 0 6px 16px rgba(0,0,0,.25);
  }
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Arial, sans-serif;
  background:
    radial-gradient(900px 500px at 20% 0%, var(--bg2), transparent 60%),
    radial-gradient(900px 500px at 80% 0%, rgba(var(--accent-rgb), .10), transparent 60%),
    var(--bg);
  color:var(--text);
}

a{color:inherit;text-decoration:none}

.container{max-width:1040px;margin:0 auto;padding:18px;}

/* Header */
.header{
  position:sticky;top:0;z-index:20;
  background:rgba(255,255,255,.70);
  border-bottom:1px solid var(--border);
  backdrop-filter: blur(12px);
}
@media (prefers-color-scheme: dark){
  .header{background:rgba(11,15,20,.75)}
}

.nav{display:flex;gap:12px;flex-wrap:wrap;align-items:center;justify-content:space-between}
.brand{font-weight:800;letter-spacing:.2px}
.brand small{font-weight:600;color:var(--muted)}

.kit{display:flex;gap:10px;flex-wrap:wrap;align-items:center}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 12px;
  border-radius:999px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.75);
  box-shadow: 0 1px 0 rgba(2,6,23,.04);
  transition: transform .08s ease, background .15s ease, box-shadow .15s ease;
}
@media (prefers-color-scheme: dark){
  .btn{background:rgba(255,255,255,.04); box-shadow:none;}
}
.btn:hover{background:rgba(255,255,255,.95); box-shadow: var(--shadow2)}
@media (prefers-color-scheme: dark){
  .btn:hover{background:rgba(255,255,255,.08)}
}
.btn:active{transform: translateY(1px)}
.btn.active{border-color: rgba(var(--accent-rgb), .45); box-shadow: 0 0 0 4px rgba(var(--accent-rgb), .12)}

/* Hero */
.hero{padding:30px 0 10px}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;
  color:var(--muted);
  border:1px solid var(--border);
  padding:6px 10px;
  border-radius:999px;
  background:rgba(255,255,255,.6);
}
@media (prefers-color-scheme: dark){
  .badge{background:rgba(255,255,255,.04)}
}

.h1{font-size:42px;line-height:1.05;margin:12px 0 10px;letter-spacing:-.4px}
.p{color:var(--muted);margin:0 0 18px;max-width:75ch;font-size:16px;line-height:1.55}

/* Cards */
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:18px}
.card{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:18px;
  box-shadow: var(--shadow2);
  transition: transform .10s ease, box-shadow .15s ease, border-color .15s ease;
}
.card:hover{transform: translateY(-1px); box-shadow: var(--shadow); border-color: rgba(var(--accent-rgb), .25)}

.card h2{margin:0 0 8px;font-size:18px;letter-spacing:-.1px}
.card p{margin:0;color:var(--muted);line-height:1.55}
.card .cta{margin-top:14px;display:inline-flex;gap:8px;align-items:center;color:var(--accent);font-weight:700}

/* Forms / tools */
.form{display:grid;gap:12px;margin-top:12px;max-width:640px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
label{display:grid;gap:6px;font-size:13px;color:var(--muted)}
input{
  padding:11px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.78);
  color:var(--text);
}
@media (prefers-color-scheme: dark){
  input{background:rgba(255,255,255,.03)}
}
input:focus{outline:none; box-shadow: 0 0 0 4px rgba(var(--accent-rgb), .15); border-color: rgba(var(--accent-rgb), .35)}
small{color:var(--muted)}
.result{margin-top:10px;padding:14px;border-radius:14px;border:1px solid rgba(var(--accent-rgb), .25);background:rgba(var(--accent-rgb), .08)}

.footer{border-top:1px solid var(--border);margin-top:28px;padding:18px 0;color:var(--muted);font-size:13px}

@media (max-width:860px){
  .h1{font-size:34px}
}
@media (max-width:700px){
  .grid{grid-template-columns:1fr}
  .row{grid-template-columns:1fr}
  .h1{font-size:30px}
}

.heroGrid{display:grid;grid-template-columns:1.35fr .65fr;gap:16px;margin-top:18px;align-items:start}
.heroRight .card{position:relative}
.sectionTitle{margin:22px 0 10px;font-size:14px;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:.08em}
.list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
.list a{display:flex;gap:10px;align-items:flex-start;padding:12px 12px;border-radius:14px;border:1px solid var(--border);background:rgba(255,255,255,.65)}
@media (prefers-color-scheme: dark){
  .list a{background:rgba(255,255,255,.03)}
}
.list a:hover{box-shadow:var(--shadow2)}
.dot{width:10px;height:10px;border-radius:999px;margin-top:5px;background:rgba(var(--accent-rgb), .70)}
@media (max-width:900px){
  .heroGrid{grid-template-columns:1fr}
}