:root {
  --erp-font-family: "Sarabun", system-ui, sans-serif;
  --erp-canvas-soft: #ffffff;
  --erp-ink: #0f172a;
  --erp-muted: #64748b;
  --erp-line: #e7edf5;
  --erp-blue: #0058be;
  --erp-blue-strong: #004a9f;
  --erp-blue-soft: #edf6ff;
  --erp-radius-control: 10px;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--erp-canvas-soft);
  color: var(--erp-ink);
  font-family: var(--erp-font-family);
}

.welcome {
  display: grid;
  min-height: 100vh;
  min-height: 100svh;
  place-items: center;
  padding: 24px;
}

.intro {
  width: min(380px, 100%);
  padding: 20px 12px;
  text-align: center;
}

.brand-logo {
  display: block;
  width: min(220px, 100%);
  height: auto;
  margin: 0 auto 24px;
}

h1 {
  margin: 0 0 12px;
  font-size: 24px;
  font-weight: 700;
  line-height: 1.35;
}

p {
  margin: 0;
  color: var(--erp-muted);
  font-size: 15px;
  line-height: 1.7;
}

.portal-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
  padding: 8px 14px;
  border: 1px solid var(--erp-line);
  border-radius: var(--erp-radius-control);
  color: var(--erp-blue);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.portal-link:hover {
  background: var(--erp-blue-soft);
  color: var(--erp-blue-strong);
}

.portal-link:focus-visible {
  outline: 2px solid var(--erp-blue);
  outline-offset: 3px;
}

@media (max-width: 480px) {
  .welcome {
    padding: 18px;
  }

  .intro {
    padding: 16px 6px;
  }

  .brand-logo {
    width: min(200px, 100%);
    margin-bottom: 22px;
  }

  h1 {
    font-size: 22px;
  }

  .desktop-break {
    display: none;
  }
}