:root {
  --background-color: #dff3ff;
  --surface-color: #ffffff;
  --primary-text-color: #1f2937;
  --secondary-text-color: #6b7280;
  --border-color: #e5e7eb;
  --accent-color: #3b82f6;
  --hover-bg-color: #f9fafb;
  --button-bg-color: #59789d;
  --button-text-color: #ffffff;
  --button-hover-bg-color: #6988ad;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--background-color);
  color: var(--primary-text-color);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 2rem 1rem;
  overflow-y: auto;
}

#app {
  width: 100%;
  max-width: 680px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  width: 100%;
}

.logo {
  max-width: 180px;
  width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
  box-shadow: 0 8px 16px rgba(0,0,0,0.1);
}

h1 {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--primary-text-color);
}

header p {
  font-size: 1rem;
  color: var(--secondary-text-color);
}

.links {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.link-card {
  background-color: var(--button-bg-color);
  color: var(--button-text-color);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  padding: 1.1rem;
  border-radius: 8px;
  border: none;
  transition: transform 0.2s ease-in-out, background-color 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
  display: block;
  -webkit-tap-highlight-color: transparent;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.link-card:hover, .link-card:focus {
  transform: translateY(-3px) scale(1.02);
  background-color: var(--button-hover-bg-color);
  outline: none;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.link-card:active {
    transform: translateY(-1px) scale(1);
}

footer {
  margin-top: 2rem;
  padding-top: 1rem;
  width: 100%;
}

.cta-section {
  margin-bottom: 1.5rem;
}

.cta-section p {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--primary-text-color);
}

.cta-link {
  color: var(--accent-color);
  font-weight: 600;
  text-decoration: none;
  transition: text-decoration 0.2s ease;
}

.cta-link:hover, .cta-link:focus {
  text-decoration: underline;
  outline: none;
}

.copyright {
  font-size: 0.875rem;
  color: var(--secondary-text-color);
}