:root {
  color-scheme: light;
  --blue-1: #0b2559;
  --blue-2: #1e3a8a;
  --blue-3: #3b82f6;
  --blue-4: #7dd3fc;
  --text-light: #f5f9ff;
  --text-muted: #cfe1ff;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(135deg, var(--blue-1) 0%, var(--blue-2) 45%, var(--blue-3) 75%, var(--blue-4) 100%);
  background-attachment: fixed;
  color: var(--text-light);
}

.hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem 1.5rem;
  gap: 0.75rem;
}

.logo {
  width: 100px;
  height: 100px;
  margin-bottom: 1rem;
  filter: drop-shadow(0 6px 18px rgba(0, 0, 0, 0.35));
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  font-weight: 700;
  margin: 0;
  letter-spacing: 0.5px;
}

.lead {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  font-weight: 600;
  margin: 0.25rem 0 0;
  color: var(--text-light);
}

.sub {
  font-size: 1rem;
  max-width: 32rem;
  margin: 0;
  color: var(--text-muted);
}

.lang-note {
  font-size: 0.85rem;
  margin-top: 0.25rem;
  color: var(--text-muted);
  opacity: 0.8;
  font-style: italic;
}

.contact-btn {
  display: inline-block;
  margin-top: 2rem;
  padding: 1.1rem 3.5rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #ffffff 0%, #dceeff 100%);
  color: var(--blue-2);
  font-size: 1.15rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.3px;
  box-shadow: 0 10px 30px rgba(3, 15, 45, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.4) inset;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.contact-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 36px rgba(3, 15, 45, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.5) inset;
}

.contact-btn:active {
  transform: translateY(-1px);
}

footer {
  text-align: center;
  padding: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  opacity: 0.75;
}