/* Base Reset & Layout */
body {
  font-family: system-ui, sans-serif;
  background: #f9fafb;
  color: #111827;
  margin: 0;
  padding: 0;
}

header {
  text-align: center;
  padding: 2rem 1rem 1rem;
  background-color: #fff;
}

header h1 {
  margin: 0;
  font-size: 1.8rem;
  font-weight: 700;
}

header p {
  margin-top: 0.25rem;
  color: #6b7280;
}

/* Nav Styles */
nav {
  margin-top: 1rem;
  margin-bottom: 2rem;
}

.nav {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin: 0;
}

.nav > li {
  position: relative;
}

.nav > li > a,
.nav > li > span {
  font-weight: bold;
  cursor: pointer;
  color: #2563eb;
  text-decoration: none;
}

/* Dropdowns */
.submenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  list-style: none;
  padding: 0.5rem;
  background: white;
  border: 1px solid #ddd;
  border-radius: 6px;
  min-width: 180px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  z-index: 10;
}

.nav > li:hover .submenu {
  display: block;
}

.submenu li {
  padding: 0.3rem 0;
}

.submenu li a {
  color: #1f2937;
  text-decoration: none;
}

/* Form Styles */
main {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1rem;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

textarea,
input[type="text"],
input[type="date"] {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #d1d5db;
  border-radius: 4px;
  margin-bottom: 1rem;
  font-family: inherit;
  font-size: 1rem;
}

button[type="submit"] {
  background: #2563eb;
  color: white;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  cursor: pointer;
}

button[type="submit"]:hover {
  background: #1d4ed8;
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem 1rem;
  color: #6b7280;
  font-size: 0.9rem;
}

/* -------------------------------------
   Responsive Design
-------------------------------------- */

@media (max-width: 768px) {
  header h1 {
    font-size: 1.5rem;
  }

  .nav {
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
  }

  .submenu {
    position: static;
    border: none;
    box-shadow: none;
    background: transparent;
    padding: 0;
  }

  .submenu li a {
    font-size: 0.95rem;
    color: #2563eb;
  }

  main {
    margin: 0 1rem;
    padding: 1rem;
  }

  textarea,
  input[type="text"],
  input[type="date"],
  button[type="submit"] {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  header h1 {
    font-size: 1.3rem;
  }

  button[type="submit"] {
    width: 100%;
    padding: 0.75rem;
  }
}