:root {
  --bg: #f7f7f8;
  --card: #fff;
  --primary: #1f8b4c;
  --muted: #666;
  --radius: 8px;
}

/* basic reset */
* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Noto Sans Bengali", "SolaimanLipi", Arial, sans-serif;
  background: var(--bg);
  color: #111;
  padding: 20px;
}

.container {
  max-width: 980px;
  margin: 0 auto;
}

/* header */
header h1 {
  text-align: center;
  margin: 0 0 14px 0;
  font-size: 22px;
  color: var(--primary);
}

/* steps / cards */
.step {
  background: var(--card);
  padding: 16px;
  border-radius: var(--radius);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  margin-bottom: 12px;
}

/* radio/option tiles */
.options {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.options label {
  background: #f0f6f2;
  padding: 10px 12px;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid transparent;
  display: flex;
  align-items: center;
  gap: 8px;
}

.options input { margin-right: 6px; }

/* containter cards */
.box {
  background: #fff;
  padding: 12px;
  border-radius: 6px;
  border: 1px solid #eee;
  margin-top: 8px;
}

/* checkbox / inline labels */
.checkbox-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}

.inline {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-right: 12px;
  margin-top: 6px;
}

/* nav buttons */
.nav { margin-top: 12px; text-align: right; }

.btn {
  border: 1px solid #ccc;
  background: #fff;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  margin-left: 6px;
  font-size: 14px;
}

.btn.primary {
  background: var(--primary);
  color: #fff;
  border-color: transparent;
}

.btn.btn-secondary {
  background: #6c757d;
  color: #fff;
  border-color: transparent;
}

/* small text / hints */
.hint { color: var(--muted); font-size: 13px; margin-top: 8px; }
.small { font-size: 13px; color: var(--muted); margin-top: 6px; display: block; }

/* inputs */
textarea, input[type="text"], select {
  width: 100%;
  padding: 8px;
  border: 1px solid #ddd;
  border-radius: 6px;
  margin-top: 6px;
  font-size: 15px;
}

/* responsive nicety */
@media (min-width:900px) {
  .options label { min-width: 180px; }
}