:root {
  --orange: #ff6b00;
  --orange-dark: #e05f00;
  --ink: #171717;
  --warm-white: #fffdf9;
  --warm-gray: #f3f1ed;
  --gray: #6b6b6b;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--warm-gray);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.card {
  background: var(--warm-white);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(23, 23, 23, .12);
  padding: 32px;
  width: 100%;
  max-width: 460px;
}
h1 { font-size: 24px; margin: 0 0 8px; }
p.sub { color: var(--gray); margin: 0 0 24px; line-height: 1.4; }
label { display: block; font-size: 13px; font-weight: 600; margin: 12px 0 4px; }
input,
select {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  border: 1px solid #d9d5ce;
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
}
select:focus,
input:focus {
  outline: 2px solid var(--orange);
  outline-offset: 1px;
  border-color: transparent;
}
.row { display: flex; gap: 12px; }
.row > div { flex: 1; }
.plan { display: flex; gap: 8px; margin-top: 6px; }
.plan label {
  flex: 1;
  margin: 0;
  padding: 10px;
  text-align: center;
  font-weight: 600;
  border: 1px solid #d9d5ce;
  border-radius: 10px;
  cursor: pointer;
  background: #fff;
}
.plan input { display: none; }
.plan label.active { border-color: var(--orange); background: #fff4ec; }
button {
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: 700;
  border: none;
  border-radius: 999px;
  background: var(--orange);
  color: #fff;
  cursor: pointer;
  margin-top: 20px;
}
button:disabled { opacity: .5; cursor: not-allowed; }
a.btn {
  display: inline-block;
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: 700;
  border: none;
  border-radius: 999px;
  background: var(--orange);
  color: #fff;
  cursor: pointer;
  margin-top: 20px;
  text-align: center;
  text-decoration: none;
}
.msg { font-size: 14px; margin-top: 12px; line-height: 1.4; }
.msg.ok { color: #238636; }
.msg.err { color: #c62828; }
.hidden { display: none; }
.hint { font-size: 12px; color: var(--gray); margin-top: 4px; }