:root {
  --brand: #f58220;
  --brand-dark: #d96b0f;
  --ink: #1a2433;
  --muted: #5f6b7a;
  --line: #d8dee6;
  --panel: #ffffff;
  --bg: #eef1f5;
  --font: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
}

.lab-strip {
  background: #111827;
  color: #fde68a;
  text-align: center;
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 8px 12px;
  font-weight: 700;
}

.topbar {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.topbar-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo-block {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.18);
  display: grid;
  place-items: center;
  font-weight: 800;
}

.logo-block strong {
  display: block;
  font-size: 18px;
}

.logo-block span {
  font-size: 12px;
  opacity: 0.9;
}

.top-links a {
  color: #fff;
  text-decoration: none;
  margin-left: 14px;
  font-size: 13px;
  opacity: 0.95;
}

.shell {
  max-width: 980px;
  margin: 28px auto 48px;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 20px;
}

.login-panel,
.side-note {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(16, 24, 40, 0.06);
}

.login-panel {
  padding: 28px 26px 22px;
}

.login-panel h1 {
  margin: 0 0 8px;
  font-size: 26px;
}

.lead {
  margin: 0 0 20px;
  color: var(--muted);
  line-height: 1.5;
  font-size: 14px;
}

label {
  display: block;
  margin: 12px 0 6px;
  font-size: 13px;
  font-weight: 600;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 12px;
  font: inherit;
}

.row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 12px 0 4px;
  font-size: 13px;
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-weight: 500;
}

.link {
  color: var(--brand-dark);
  text-decoration: none;
}

button {
  width: 100%;
  margin-top: 16px;
  border: 0;
  border-radius: 8px;
  padding: 12px 16px;
  background: var(--brand);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: var(--brand-dark);
}

.footnote {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.side-note {
  padding: 24px 22px;
}

.side-note h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.side-note ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.6;
  font-size: 14px;
}

@media (max-width: 760px) {
  .shell {
    grid-template-columns: 1fr;
  }
}