/* Soda: dark panel + ALSO green, like the existing app. */
:root {
  --bg: #23252f; --panel: rgb(47, 50, 67); --field: rgb(40, 40, 60);
  --text: #fff; --muted: rgba(255, 255, 255, .68); --line: rgba(255, 255, 255, .22);
  --green: rgb(165, 229, 121); --green-dark: #50cb93; --error: #ff8a80;
}
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; display: flex; align-items: flex-start; justify-content: center;
  background: var(--bg); color: var(--text);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}
.card {
  width: min(100% - 32px, 400px); margin: 12vh 0 32px; padding: 28px;
  background: var(--panel); border: 1px solid rgba(165, 229, 121, .35); border-radius: 8px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, .45);
}
h1 { margin: 0 0 20px; color: var(--green); font-size: 24px; letter-spacing: .08em; }
h1 span { color: var(--muted); font-size: 12px; font-weight: 400; letter-spacing: 0; }
h2 { margin: 0 0 12px; font-size: 18px; }
p { margin: 0 0 14px; color: var(--muted); }
p strong { color: var(--text); }
form { display: grid; gap: 14px; }
label { display: grid; gap: 6px; font-size: 14px; color: var(--muted); }
input {
  width: 100%; padding: 11px 12px; font: inherit; color: var(--text);
  background: var(--field); border: 1px solid var(--line); border-radius: 5px; outline: none;
}
input:focus { border-color: var(--green); }
input[readonly] { color: var(--muted); }
button[type=submit] {
  padding: 12px; font: inherit; font-weight: 700; color: #1d2a14; cursor: pointer;
  background: var(--green); border: 0; border-radius: 5px;
}
button[type=submit]:hover { background: var(--green-dark); }
button[type=submit]:disabled { opacity: .6; cursor: default; }
button.link {
  margin-top: 14px; padding: 0; font: inherit; font-size: 14px; color: var(--muted);
  background: none; border: 0; cursor: pointer; text-decoration: underline;
}
.msg { padding: 10px 12px; border-radius: 5px; font-size: 14px; background: rgba(255, 138, 128, .14); color: var(--error); }
.msg.ok { background: rgba(165, 229, 121, .14); color: var(--green); }
.qr { width: 200px; margin: 0 auto 14px; }
.qr svg { display: block; width: 100%; border-radius: 4px; }
.secret, .codes span { font-family: ui-monospace, Menlo, Consolas, monospace; }
.secret { margin-bottom: 18px; padding: 8px 10px; word-break: break-all; background: var(--field); border-radius: 5px; font-size: 14px; }
.codes { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 12px; margin-bottom: 18px; font-size: 14px; }
.muted { font-size: 14px; }