:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --text: #17212b;
  --muted: #667085;
  --border: #d0d5dd;
  --primary: #155eef;
  --primary-hover: #004eeb;
  --danger-bg: #fff1f0;
  --danger: #b42318;
  --shadow: 0 20px 55px rgba(16, 24, 40, 0.12);
}
* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
}
.page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 18px;
}
.card {
  width: 100%;
  max-width: 430px;
  background: var(--card);
  border: 1px solid #eaecf0;
  border-radius: 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.header {
  padding: 30px 32px 22px;
  border-bottom: 1px solid #eaecf0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}
.brand-mark {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  overflow: hidden;
  flex: 0 0 52px;
}
.brand-mark img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}
.brand-name {
  font-size: 17px;
  font-weight: 700;
}
h1 {
  margin: 0 0 8px;
  font-size: 25px;
  line-height: 1.25;
}
.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}
.content { padding: 26px 32px 30px; }
#ssomsg:empty, #badmsg:empty { display: none; }
#ssomsg {
  margin: 0 0 18px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}
#badmsg {
  margin: 0 0 18px;
  padding: 12px 14px;
  border: 1px solid #fecdca;
  border-radius: 8px;
  background: var(--danger-bg);
  color: var(--danger);
  font-size: 14px;
  line-height: 1.45;
}
.field { margin-bottom: 17px; }
.field label {
  display: block;
  margin-bottom: 7px;
  font-size: 14px;
  font-weight: 600;
}
.text-input {
  width: 100%;
  height: 44px;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font-size: 16px;
  outline: none;
}
.text-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(21, 94, 239, 0.12);
}
.device-choice {
  margin: 4px 0 19px;
  padding: 12px 14px;
  border: 1px solid #eaecf0;
  border-radius: 8px;
  background: #f9fafb;
}
.radio-row {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  padding: 4px 0;
  color: #344054;
  font-size: 13px;
  line-height: 1.35;
}
.radio-row input { margin-top: 2px; }
.button {
  width: 100%;
  height: 44px;
  border: 0;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}
.button:hover { background: var(--primary-hover); }
.button:focus { outline: 3px solid rgba(21, 94, 239, 0.18); }
.reset-box {
  margin-bottom: 16px;
  padding: 12px 14px;
  border: 1px solid #eaecf0;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.45;
}
.reset-box a { color: var(--primary); font-weight: 600; }
.footer {
  padding: 16px 32px 22px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}
.noscript {
  max-width: 700px;
  margin: 16px auto;
  padding: 12px 16px;
  border: 1px solid #fecdca;
  border-radius: 8px;
  background: var(--danger-bg);
  color: var(--danger);
  font-family: Arial, Helvetica, sans-serif;
}
@media (max-width: 480px) {
  .page { padding: 0; align-items: stretch; }
  .card { max-width: none; min-height: 100vh; border: 0; border-radius: 0; box-shadow: none; }
  .header, .content, .footer { padding-left: 22px; padding-right: 22px; }
  .header { padding-top: 28px; }
}