:root {
    --bg-color: #f0f2f5;
    --container-bg: #ffffff;
    --text-color: #333;
    --subtle-text-color: #555;
    --input-bg: #ffffff;
    --input-border: #ccc;
    --stat-box-bg: #f9f9f9;
    --freq-item-bg: #f1f1f1;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --container-bg: #2c2c2c;
    --text-color: #f1f1f1;
    --subtle-text-color: #aaa;
    --input-bg: #3a3a3a;
    --input-border: #555;
    --stat-box-bg: #3a3a3a;
    --freq-item-bg: #4a4a4a;
    --shadow-color: rgba(0, 0, 0, 0.4);
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
  min-height: 100vh;
  margin: 0;
  transition: background-color 0.3s, color 0.3s;
}

.theme-switcher-container {
    position: absolute;
    top: 1rem;
    right: 1rem;
}

#theme-switcher {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    transition: transform 0.2s;
}

#theme-switcher:hover { transform: scale(1.1); }

.container, .stats-container {
  text-align: center;
  background-color: var(--container-bg);
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 10px 20px var(--shadow-color);
  width: 90%;
  max-width: 800px;
  transition: background-color 0.3s, box-shadow 0.3s;
}

.stats-container { margin-top: 2rem; }

h1 {
  color: var(--text-color);
  font-size: 2.5em;
  margin-bottom: 20px;
}

.controls {
    margin-bottom: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
}

.controls label {
    font-size: 1.1em;
    color: var(--subtle-text-color);
}

.controls input[type="number"] {
    width: 80px;
    padding: 8px 12px;
    font-size: 1em;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    text-align: center;
    background-color: var(--input-bg);
    color: var(--text-color);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.06);
}

.lotto-numbers {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 40px;
  min-height: 75px;
}

lotto-ball {
  width: 60px;
  height: 60px;
  font-size: 1.5em;
}


#generator-btn {
  background-color: #4CAF50;
  color: white;
  border: none;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 1.2em;
  font-weight: bold;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.1s ease;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

#generator-btn:hover {
  background-color: #45a049;
}

#generator-btn:active {
    transform: translateY(2px);
    box-shadow: 0 2px 3px rgba(0, 0, 0, 0.1);
}

.stats-container h2 {
    font-size: 2em;
    color: var(--text-color);
    margin-bottom: 20px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-box {
    background-color: var(--stat-box-bg);
    padding: 20px;
    border-radius: 12px;
    text-align: center;
}

.stat-box h3 {
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--subtle-text-color);
}

.stat-numbers {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.frequencies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 15px;
    margin-top: 20px;
    text-align: left;
}

.freq-item {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--freq-item-bg);
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 0.9em;
}

.freq-item .count {
    font-weight: bold;
    color: var(--text-color);
}

@media (max-width: 600px) {
    h1 { font-size: 2em; }
    .controls { flex-direction: column; gap: 10px; }
    .stats-container h2 { font-size: 1.5em; }
    lotto-ball { width: 50px; height: 50px; font-size: 1.2em; }
}