:root {
  --green: #107627;
  --green-dark: #14381e;
  --green-light: #e8f5e9;
  --ink: #14381e;
  --gray: #6b7280;
  --border: #d1d5db;
  --bg: #f0fdf4;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, var(--green-light), var(--bg));
  color: var(--ink);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.card {
  width: 100%; max-width: 380px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(16, 118, 39, 0.12);
  padding: 32px 28px;
  text-align: center;
}
.logo { display: block; margin: 0 auto 18px; height: auto; max-width: 150px; }
h1 { font-size: 20px; margin: 0 0 6px; color: var(--green-dark); }
.sub, .hint { font-size: 13.5px; color: var(--gray); margin: 0 0 20px; line-height: 1.5; }
.hint { margin-bottom: 16px; }
.step { display: flex; flex-direction: column; gap: 6px; text-align: left; }
label { font-size: 12.5px; font-weight: 600; color: var(--green-dark); margin-top: 8px; }
label.remember { display: flex; align-items: center; gap: 8px; font-weight: 500; color: var(--gray); margin-top: 14px; cursor: pointer; }
label.remember input { width: auto; }
input[type="text"], input[type="password"], #totp-code, #enroll-code {
  width: 100%; padding: 11px 13px; font-size: 15px;
  border: 1px solid var(--border); border-radius: 9px; outline: none;
  transition: border-color .15s, box-shadow .15s;
}
#totp-code, #enroll-code { letter-spacing: 6px; text-align: center; font-size: 20px; }
input:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(16, 118, 39, 0.15); }
.btn {
  margin-top: 18px; padding: 12px; font-size: 15px; font-weight: 600;
  color: #fff; background: var(--green); border: none; border-radius: 9px; cursor: pointer;
  transition: background .15s, opacity .15s;
}
.btn:hover { background: var(--green-dark); }
.btn:disabled { opacity: .6; cursor: default; }
.err {
  background: #fef2f2; border: 1px solid #fecaca; color: #b91c1c;
  font-size: 13px; padding: 10px 12px; border-radius: 9px; margin-bottom: 16px; text-align: left;
}
.qr { display: flex; justify-content: center; margin: 6px 0 12px; }
.qr svg { width: 180px; height: 180px; border-radius: 8px; background: #fff; }
.secret { font-size: 12px; color: var(--gray); text-align: center; margin: 0 0 6px; word-break: break-all; }
.secret code { background: var(--green-light); padding: 2px 6px; border-radius: 5px; color: var(--green-dark); }
.footnote { margin: 22px 0 0; font-size: 11px; color: #9ca3af; text-align: center; }