:root {
  --bg-primary: #4993a3;
  --bg-vignette: #1a444a;
  --hover-icon: #f49422;
  --text-primary: #ffffff;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  /* Radial gradient for the soft vignette effect */
  background: radial-gradient(circle at center, var(--bg-primary) 0%, var(--bg-vignette) 100%);
  background-attachment: fixed;
  font-family: 'Inter', sans-serif;
  color: var(--text-primary);
  display: flex;
  justify-content: center;
  align-items: flex-start; 
}

.container {
  width: 100%;
  max-width: 560px;
  padding: 40px 20px;
  box-sizing: border-box;
}

header {
  text-align: center;
  margin-bottom: 40px;
  animation: fadeInDown 0.8s ease-out;
}

.title {
  font-size: 28px;
  font-weight: 600;
  margin: 0 0 10px 0;
  letter-spacing: -0.5px;
}

.subtitle {
  font-size: 16px;
  opacity: 0.8;
  font-weight: 300;
  margin: 0;
}

.link-section {
  margin-bottom: 40px;
  animation: fadeInUp 0.8s ease-out;
  animation-fill-mode: both;
}

.link-section:nth-child(2) {
  animation-delay: 0.2s;
}

.section-title {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 24px;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 2px;
  opacity: 0.9;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Lines around section titles for modern look */
.section-title::before,
.section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(255, 255, 255, 0.2);
  margin: 0 15px;
}

.links-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* Minimalist Glassmorphism Button */
.whatsapp-btn {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  position: relative;
  width: 100%;
  padding: 16px 24px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-sizing: border-box;
}

.whatsapp-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.whatsapp-btn:active {
  transform: translateY(0);
}

.whatsapp-btn svg {
  width: 24px;
  height: 24px;
  fill: var(--text-primary);
  transition: fill 0.3s ease, transform 0.3s ease;
  margin-right: 12px;
  flex-shrink: 0;
}

/* Hover effect on WhatsApp icon */
.whatsapp-btn:hover svg {
  fill: var(--hover-icon);
  transform: scale(1.1);
}

/* Center the text while keeping the icon on the left */
.whatsapp-btn span {
  flex-grow: 1;
  text-align: center;
  margin-right: 36px; /* Offset to center text relative to full width (24px icon + 12px gap) */
}

footer {
  text-align: center;
  margin-top: 60px;
  font-size: 13px;
  opacity: 0.6;
  font-weight: 300;
  animation: fadeIn 1s ease-out 0.6s both;
}

/* Animations */
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (max-width: 480px) {
  .whatsapp-btn {
    padding: 14px 20px;
    font-size: 15px;
  }
}