* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: #f4f7fb;
  color: #222;
}

.wrap {
  max-width: 960px;
  margin: auto;
  padding: 20px;
}

/* HEADER */
.header {
  background: linear-gradient(135deg, #004aad, #007bff);
  color: #fff;
  text-align: center;
  padding: 50px 20px;
}

.header h1 {
  margin: 0;
  font-size: 32px;
}

.header p {
  margin-top: 8px;
  opacity: 0.9;
}

/* TRACKER BOX */
.tracker-box {
  background: #fff;
  padding: 25px;
  margin-top: -40px;
  border-radius: 10px;
  box-shadow: 0 10px 25px rgba(0,0,0,.08);
  text-align: center;
}

.tracker-box h2 {
  margin-top: 0;
}

input {
  width: 100%;
  padding: 14px;
  margin-top: 10px;
  font-size: 16px;
  border: 1px solid #ccc;
  border-radius: 6px;
}

button {
  width: 100%;
  margin-top: 15px;
  padding: 14px;
  background: #007bff;
  color: #fff;
  border: none;
  font-size: 16px;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background: #005edb;
}

#result {
  margin-top: 20px;
  text-align: left;
}

/* CONTENT */
.content {
  margin-top: 40px;
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0,0,0,.05);
}

.content h2, .content h3 {
  margin-top: 0;
}

.content ul, .content ol {
  padding-left: 20px;
}

/* FOOTER */
.footer {
  margin-top: 50px;
  background: #0f172a;
  color: #cbd5e1;
  text-align: center;
  padding: 25px;
}

.footer .small {
  font-size: 13px;
  opacity: 0.7;
}