:root {
  --primary: #1e3a8a;        
  --background: #0f172a;     
  --card-bg: #1e293b;        
  --text: #ffffff;           
  --border: #334155;         
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--background);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 1000px;
  margin: 1.2rem auto;
  padding: 0 1rem;
}

h1, h2 {
  margin-bottom: 1rem;
}

.card {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
  margin-bottom: 1rem;
}

form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

input, select, button {
  padding: 0.75rem;
  font-size: 1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
}

select {
  background: white;
  width: 150px;
  font-weight: 500;
  font-size: large;
}

input:focus,
select:focus,
button:focus {
  outline: 3px solid rgba(177, 54, 30, 0.4);
  outline-offset: 2px;
}

button {
  background: var(--primary);
  color: white;
  border: none;
  cursor: pointer;
  font-weight: 600;
}

button:hover {
  opacity: 0.9;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

th {
  background: #1e3a8a;
}

.top-user {
  background-color: #894d02;
  font-weight: bold;
}

.hidden {
  display: none;
}

.visually-hidden {
  position: absolute;
  left: -9999px;
}