:root {
  --color-bg: #ffffff;
  --color-text: #1e1e1e;
  --color-muted: #5a5a5a;
  --color-accent: #3a5674;
  --color-accent-dark: #2a4058;
  --color-surface: #f5f7fa;
  --color-border: #dcdcdc;
  --font-base: 'Source Sans Pro', 'Segoe UI', Arial, sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

main {
  min-height: 60vh;
}

.button,
button,
input[type="submit"] {
  font: inherit;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.section-hero {
  padding: clamp(2rem, 6vw, 4rem) 1rem;
  text-align: center;
}

.section-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 0.5rem;
}

.section {
  padding: clamp(1rem, 1vw, 2rem) 1rem;
}

.section-narrow {
  max-width: 980px;
  margin: 0 auto;
}

.grid-three {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 1.5rem;
  box-shadow: 0 12px 24px rgba(0,0,0,0.05);
}

.card-success {
  border-left: 4px solid #2e7d32;
  background: #e9f5ec;
  margin-bottom: 1.5rem;
  padding: 1rem 1.25rem;
  border-radius: 6px;
}

.card-error {
  border-left: 4px solid #c62828;
  background: #fdecea;
  margin-bottom: 1.5rem;
  padding: 1rem 1.25rem;
  border-radius: 6px;
}

.form-control {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font: inherit;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(58,86,116,0.18);
}

.is-invalid {
  border-color: #c62828 !important;
}

.contact-form {
  margin-top: 1rem;
}

.form-grid {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 0.75rem 1.25rem;
  border: 1px solid var(--color-border);
  padding: 1.5rem;
  border-radius: 6px;
  background: #fff;
}

.form-grid label {
  font-weight: 600;
  align-self: center;
}

.form-grid .field {
  display: flex;
  flex-direction: column;
}

.form-actions {
  margin-top: 1.5rem;
  text-align: right;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  padding: 0.75rem 2.5rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.btn-primary:hover {
  background: var(--color-accent-dark);
}

.captcha-wrapper {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

@media (max-width: 640px) {
  .page-shell {
    padding: 0 1rem;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .form-actions {
    text-align: left;
  }

  .btn-primary {
    width: 100%;
  }
}