/* Reset and base styles */
body {
  margin: 0;
  font-family: 'Segoe UI', 'Roboto', 'Arial', sans-serif;
  background: #f7f9fb;
  color: #283350;
}
nav {
  background: #1f375b;
  color: #fff;
  padding: 18px 32px;
  font-size: 1.1em;
  letter-spacing: 1px;
  box-shadow: 0 1px 8px rgba(0,0,0,0.04);
  display: flex;
  align-items: center;
  gap: 24px;
}
nav a, nav b {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  margin-right: 18px;
  transition: color 0.18s, background 0.18s;
  border-radius: 7px;
  padding: 7px 14px;
}
nav a:hover, nav b:hover {
  color: #ffb94b;
  background: rgba(255,185,75,0.09);
}
nav .active, nav b.active {
  background: #ffb94b;
  color: #1f375b !important;
  box-shadow: 0 2px 8px rgba(255,185,75,0.13);
  font-weight: 700;
}

h2, h3 {
  color: #1f375b;
}

/* ...rest of your CSS remains unchanged... */

input[type="text"], input[type="password"], input[type="file"] {
  padding: 10px 12px;
  font-size: 1em;
  border: 1px solid #b3bed7;
  border-radius: 6px;
  margin-bottom: 12px;
  background: #fafdff;
  transition: border 0.15s;
  width: 90%;
  max-width: 400px;
}

input[type="text"]:focus, input[type="password"]:focus {
  border: 1.5px solid #2670c7;
  outline: none;
}

button {
  background: #2670c7;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 10px 22px;
  font-size: 1em;
  margin: 8px 0;
  cursor: pointer;
  font-weight: 500;
  box-shadow: 0 2px 6px rgba(38,112,199,0.07);
  transition: background 0.18s;
}

button:hover {
  background: #154d94;
}

form {
  margin-bottom: 22px;
}

.login-container {
  max-width: 450px;
  margin: auto;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(38,112,199,0.07);
  padding: 36px 28px 32px 28px;
}

.model-list {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
  margin-top: 35px;
  justify-content: center;
}

.model-card {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 18px rgba(38,112,199,0.07);
  padding: 28px 24px 22px 24px;
  width: 270px;
  text-align: center;
  transition: box-shadow 0.18s;
}

.model-card:hover {
  box-shadow: 0 6px 32px rgba(38,112,199,0.13);
}

.model-card h3 {
  margin-top: 0;
  margin-bottom: 6px;
}

.model-card button {
  margin-top: 12px;
  width: 80%;
}

table {
  border-collapse: collapse;
  width: 98%;
  margin: 22px auto;
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 2px 18px rgba(38,112,199,0.07);
  font-size: 1em;
}

th, td {
  padding: 13px 10px;
  border-bottom: 1px solid #e6eaf2;
  text-align: left;
}

th {
  background: #eaf2fb;
  color: #1f375b;
  font-weight: 600;
}

tr:last-child td {
  border-bottom: none;
}

img {
  border-radius: 6px;
  border: 1px solid #e6eaf2;
  background: #fff;
}

@media (max-width: 700px) {
  .model-list {
    flex-direction: column;
    gap: 18px;
    align-items: center;
  }
  .model-card { width: 98%; }
  table, th, td {
    font-size: 0.97em;
  }
  nav { flex-direction: column; gap: 10px; padding: 14px 6px; font-size: 1em;}
}