body {
  font-family: 'Segoe UI', Arial, Calibri, sans-serif;
  background: #f0f2f5;
  color: #222;
  min-height: 100vh;
  margin: 0;
  display: flex;
  flex-direction: column;
}

nav {
  background: #0077b6;
  color: #fff;
  padding: 0.7rem 0;
  box-shadow: 0 2px 8px rgba(0,119,182,0.10);
  margin-bottom: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

nav h1 {
  margin: 0 2rem 0 1rem;
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
}


nav ul {
  list-style: none;
  display: flex;
  gap: 1.2rem;
  margin: 0 1.5rem 0 0;
  padding: 0;
}

nav ul li {
  display: inline;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  padding: 0.3rem 0.9rem;
  border-radius: 6px;
  transition: background 0.2s;
  font-size: 1rem;
}

nav ul li a:hover {
  background: #90e0ef;
  color: #0077b6;
}

.container {
  max-width: 720px;
  background: #fff;
  padding: 32px 28px;
  margin: 32px auto 0 auto;
  box-shadow: 0 2px 12px rgba(0,119,182,0.10);
  border-radius: 14px;
  flex: 1 0 auto;
  position: relative;
}

h1, h2 {
  text-align: center;
  color: #0077b6;
  margin-bottom: 1.2rem;
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: 1px;
}

h3, h4 {
  color: #0077b6;
  margin-top: 1.2rem;
  margin-bottom: 0.7rem;
}

.form-group {
  margin-bottom: 1.2rem;
}

label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: #0077b6;
}

input[type="text"],
input[type="email"],
input[type="file"],
textarea {
  width: 100%;
  padding: 12px;
  margin: 8px 0;
  border: 1px solid #e3eafc;
  border-radius: 6px;
  font-size: 1rem;
  background: #f8fbff;
  transition: border 0.2s;
  box-sizing: border-box;
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
  border-color: #0077b6;
  outline: none;
  background: #e3eafc;
}

button {
  background-color: #0077b6;
  color: white;
  padding: 12px;
  width: 100%;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  margin-top: 8px;
  transition: background 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 8px rgba(0,119,182,0.07);
}

button:hover {
  background-color: #005bb5;
  box-shadow: 0 4px 16px rgba(0,119,182,0.13);
}

small {
  color: #666;
  font-size: 0.95rem;
}

ul, ol {
  padding-left: 1.5rem;
  margin-top: 0.5rem;
  margin-bottom: 1rem;
}

#atsResult {
  background: #f8fbff;
  border: 1px solid #e3eafc;
  border-radius: 10px;
  padding: 1.5rem;
  margin-top: 2rem;
  font-size: 1.05rem;
}

footer {
  padding-top: 2%;
  text-align: center;
  padding: 1.2rem 0;
  background: #e3eafc;
  color: #26aaf0;
  margin-top: auto;
  font-size: 1rem;
  border-top: 1px solid #90e0ef;
  flex-shrink: 0;
  width: 100%;
}

.hidden {
  display: none;
}

@media (max-width: 700px) {
  .container {
    padding: 1rem 0.5rem;
    max-width: 98vw;
    margin-top: 16px;
  }
  h1, h2 {
    font-size: 1.2rem;
  }
  nav h1 {
    font-size: 1.1rem;
    margin: 0 0.5rem 0 0.5rem;
  }
  nav ul {
    gap: 0.7rem;
    font-size: 0.95rem;
    margin: 0 0.5rem 0 0;
  }
}