:root {
  --bg: #f4f4f9;
  --text: #0f172a;
  --card: #ffffff;
  --border: #cbd5e1;

  --primary: #1b4ba8;   /* salamence-ish blue */
  --primary2: #133b85;  /* darker navy */
  --shadow: rgba(0, 0, 0, 0.10);
}

body.dark {
  --bg: #0b1220;
  --text: #e5e7eb;
  --card: #121a2b;
  --border: #2a3550;

  --primary: #2f63d6;
  --primary2: #1f3f8e;
  --shadow: rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

body {
  font-family: Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  padding: 0;
  margin: 0;
}

header {
  background: var(--primary);
  color: white;
  padding: 25px;
  text-align: center;
}

.navbar {
  background: var(--primary2);
  padding: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

.navbar a {
  color: white;
  text-decoration: none;
  font-weight: bold;
  font-size: 16px;
}

.navbar a:hover { text-decoration: underline; }

.container {
  margin: 30px auto;
  width: 90%;
  max-width: 900px;
}

h2 { color: var(--primary); margin-top: 0; }

.card-box {
  border: 1px solid var(--border);
  padding: 15px;
  margin: 15px 0;
  background: var(--card);
  border-radius: 10px;
  box-shadow: 0 2px 10px var(--shadow);
}

.card-box h3 { margin: 0 0 6px 0; }

button {
  background: var(--primary);
  color: white;
  border: none;
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
}

button:hover { background: var(--primary2); }

.controls {
  display: grid;
  grid-template-columns: 1fr 180px 180px;
  gap: 10px;
  margin: 16px 0 18px 0;
}

input, select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
}

.small-note {
  opacity: 0.8;
  font-size: 14px;
}