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

:root {
  --teal: #0d9488;
  --teal-dark: #0f766e;
  --teal-light: #ccfbf1;
  --slate-900: #0f172a;
  --slate-700: #334155;
  --slate-500: #64748b;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --white: #ffffff;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--slate-700);
  background: var(--white);
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */

header {
  background: linear-gradient(135deg, var(--teal-dark) 0%, var(--teal) 100%);
  color: var(--white);
  padding: 4rem 0 3.5rem;
  text-align: center;
}

.badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  color: var(--white);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.35rem 1rem;
  border-radius: 999px;
  margin-bottom: 1.5rem;
}

header h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1rem;
}

.subtitle {
  font-size: 1rem;
  opacity: 0.85;
}

/* Main sections */

main {
  padding: 3.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

section h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--teal-light);
}

/* Activity list */

.activity-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1rem;
}

.activity-list li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.activity-list .icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.activity-list strong {
  display: block;
  color: var(--slate-900);
  font-weight: 600;
  margin-bottom: 0.25rem;
}

/* Contact */

.contact-link {
  display: inline-block;
  margin-top: 0.75rem;
  background: var(--teal);
  color: var(--white);
  text-decoration: none;
  font-weight: 600;
  padding: 0.65rem 1.5rem;
  border-radius: 0.5rem;
  transition: background 0.15s ease;
}

.contact-link:hover {
  background: var(--teal-dark);
}

/* Footer */

footer {
  background: var(--slate-100);
  border-top: 1px solid var(--slate-200);
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.875rem;
  color: var(--slate-500);
}

footer a {
  color: var(--teal-dark);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}