/* ===== Tema claro (default) ===== */
:root{
  --bg:#ffffff;
  --card:#ffffff;
  --text:#111111;
  --muted:#555555;
  --accent:#ff5da2;
  --border:#000000;
  --shadow: rgba(0,0,0,.06);
  --navbg:#ffffff;
}

/* ===== Tema oscuro ===== */
html[data-theme="dark"]{
  --bg:#0b1220;
  --card:#101a2f;
  --text:#e9ecf1;
  --muted:#a8b0c2;
  --accent:#ff5da2;
  --border: rgba(255,255,255,.12);
  --shadow: rgba(0,0,0,.28);
  --navbg: rgba(255,255,255,.08);
}



*{box-sizing:border-box}
body{
  margin:0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.container{
  max-width: 520px;
  margin:0 auto;
  padding:18px 16px 28px;
}

.header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:14px;
}

.h1{
  font-size:22px;
  font-weight:800;
  letter-spacing:.2px;
  margin:0;
}

.badge{
  padding:8px 12px;
  border-radius:999px;
  background: var(--navbg);
  border:1px solid var(--border);
  color: var(--muted);
  font-size:12px;
}

.card{
  background: var(--card);
  border:1.5px solid var(--border);
  border-radius:20px;
  padding:18px;
  margin-bottom:16px;
  box-shadow: 0 8px 20px var(--shadow);
}
.big-number{
  font-size:44px;
  font-weight:900;
  margin:6px 0 2px;
}

.sub{
  color:var(--muted);
  margin:0;
  font-size:14px;
}

.btn{
  width:100%;
  border:0;
  padding:14px 16px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent), #ff8bc1);
  color:#081018;
  font-weight:900;
  font-size:16px;
  cursor:pointer;
  margin-top:10px;
}

.nav{
  display:grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap:10px;
}

.nav a{
  text-decoration:none;
  text-align:center;
  padding:12px 10px;
  border-radius:16px;
  background: var(--navbg);
  border:1.5px solid var(--border);
  color: var(--text);
  font-weight:700;
  font-size:13px;
}

.result{
  margin-top:12px;
  padding:0;
  background:none;
  border:none;
  color:#111;
  font-weight:600;
}


.result{
  margin-top:12px;
  padding:0;
  background:none;
  border:none;
  color: var(--text);
  font-weight:600;
}

.small{
  color:var(--muted);
  font-size:12px;
}

.input{
  width:100%;
  padding:12px 14px;
  border-radius:14px;
  border:1.5px solid var(--border);
  background: var(--card);
  color: var(--text);
  outline:none;
}

img{
  max-width:100%;
  height:auto;
  display:block;
}

.list-item{
  display:block;
  text-decoration:none;
  padding:14px 14px;
  border-radius:16px;
  background: var(--navbg);
  border:1.5px solid var(--border);
  color: var(--text);
  font-weight:800;
}

.list-item:active{
  transform: scale(0.99);
}