:root {
  --primary: #2c3e50;
  --secondary: #3498db;
  --accent: #1abc9c;
  --bg: #f8f9fa;
  --text: #34495e;
  --white: #ffffff;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --glass: rgba(255, 255, 255, 0.8);
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  overflow-x: hidden;
  font-family: "Inter", "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

header,
nav,
#content,
footer {
  width: 100%;
  box-sizing: border-box;
}

header {
  background-color: var(--white);
  padding: 0;
  overflow: hidden;
  box-shadow: var(--shadow);
}

header img {
  width: 100%;
  height: 350px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

header img:hover {
  transform: scale(1.02);
}

nav {
  background: var(--glass);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 2rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: center;
  gap: 2rem;
}

nav ul li a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

nav ul li a:hover {
  color: var(--secondary);
}

#content {
  max-width: 1000px;
  margin: 2rem auto;
  padding: 2rem;
  background: var(--white);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

#content h1 {
  color: var(--primary);
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

#content img {
  width: 100%;
  border-radius: 8px;
  margin: 1.5rem 0;
}

footer {
  background-color: var(--primary);
  color: var(--white);
  text-align: center;
  padding: 2rem;
  margin-top: 4rem;
}

table {
  width: 100%;
  margin: 2rem 0;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

table th,
table td {
  padding: 1rem;
  border: 1px solid #eee;
}

table th {
  background-color: var(--secondary);
  color: var(--white);
  font-weight: 600;
}

table tr:nth-child(even) {
  background-color: #fcfcfc;
}

form {
  display: grid;
  gap: 1rem;
  max-width: 600px;
}

form label {
  font-weight: 600;
  color: var(--primary);
}

form input,
form textarea {
  width: 100%;
  padding: 0.8rem;
  border: 2px solid #eee;
  border-radius: 6px;
  transition: border-color 0.3s ease;
}

form input:focus,
form textarea:focus {
  outline: none;
  border-color: var(--secondary);
}

form input[type="submit"] {
  background-color: var(--secondary);
  color: var(--white);
  border: none;
  font-weight: 700;
  padding: 1rem;
  cursor: pointer;
  transition: background 0.3s ease;
}

form input[type="submit"]:hover {
  background-color: var(--primary);
}

form input[type="reset"] {
  background-color: #e74c3c;
  color: var(--white);
  border: none;
  padding: 0.8rem;
  cursor: pointer;
}

/* Responsiveness */
@media (max-width: 768px) {
  nav ul {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }

  header img {
    height: 200px;
  }

  #content {
    margin: 1rem;
    padding: 1.5rem;
  }

  #content h1 {
    font-size: 1.8rem;
  }
}