:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #64748b;
  --line: #d8e0ea;
  --surface: #ffffff;
  --soft: #f6f8fb;
  --brand: #1667e8;
  --brand-dark: #0b1224;
  --accent: #19c9a7;
  --danger: #c81e1e;
  --danger-soft: #fff1f1;
  --success: #067647;
  --success-soft: #edfdf4;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(420px, 540px) 1fr;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: var(--surface);
  letter-spacing: 0;
}

a { color: inherit; text-decoration: none; }

.auth-panel {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 44px;
  border-right: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 42px;
  font-weight: 900;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 10px 24px rgba(22, 103, 232, .2);
}

h1 {
  margin: 0 0 10px;
  font-size: 34px;
  line-height: 1.14;
  letter-spacing: 0;
}

p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

form {
  display: grid;
  gap: 15px;
  margin-top: 28px;
}

label {
  display: grid;
  gap: 7px;
  font-size: 13px;
  font-weight: 800;
}

input {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 0 12px;
  color: var(--ink);
  font: inherit;
  font-size: 15px;
  outline: none;
}

input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(22, 103, 232, .12);
}

button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border: 1px solid var(--brand);
  border-radius: 7px;
  background: var(--brand);
  color: #fff;
  font: inherit;
  font-weight: 900;
  padding: 0 14px;
  cursor: pointer;
}

.secondary {
  border-color: var(--line);
  background: #fff;
  color: var(--ink);
}

.subtle {
  color: var(--muted);
  font-size: 14px;
}

.message {
  display: none;
  border-radius: 7px;
  padding: 11px 12px;
  font-size: 14px;
  font-weight: 800;
}

.message.error {
  border: 1px solid #ffc9c9;
  background: var(--danger-soft);
  color: var(--danger);
}

.message.notice {
  border: 1px solid #b7ebce;
  background: var(--success-soft);
  color: var(--success);
}

.links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 18px;
}

.visual {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 44px;
  background:
    radial-gradient(circle at 20% 20%, rgba(25, 201, 167, .18), transparent 34%),
    radial-gradient(circle at 82% 24%, rgba(22, 103, 232, .16), transparent 34%),
    #f6f8fb;
}

.preview {
  width: min(640px, 100%);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 24px 80px rgba(17, 24, 39, .13);
  overflow: hidden;
}

.preview-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px;
  border-bottom: 1px solid var(--line);
  background: #fbfcfe;
}

.preview-title { font-weight: 900; }

.pill {
  border-radius: 999px;
  background: #e8fbf6;
  color: #087f5b;
  font-size: 12px;
  font-weight: 900;
  padding: 6px 10px;
}

.preview-body {
  display: grid;
  gap: 12px;
  padding: 16px;
}

.row {
  display: grid;
  grid-template-columns: 44px 1fr auto;
  gap: 12px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 12px;
}

.avatar {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 9px;
  background: var(--brand-dark);
  color: #fff;
  font-weight: 900;
}

.row strong { display: block; margin-bottom: 4px; }
.row span { color: var(--muted); font-size: 13px; }

@media (max-width: 900px) {
  body { grid-template-columns: 1fr; }
  .auth-panel { min-height: auto; border-right: 0; padding: 32px 22px; }
  .visual { min-height: auto; padding: 0 22px 32px; }
}