:root {
  color-scheme: light;
  font-family: Inter, Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --bg: #f4f7fb;
  --tint-green: rgba(33, 150, 113, 0.14);
  --tint-amber: rgba(247, 181, 55, 0.2);
  --text: #172033;
  --text-muted: #5b6678;
  --accent: #1a8b68;
  --accent-hover: #157759;
  --panel-bg: rgba(255, 255, 255, 0.94);
  --panel-border: #d8e0ec;
  --panel-shadow: 0 20px 50px rgba(32, 48, 76, 0.12);
  --card-bg: #ffffff;
  --card-border: #e4eaf3;
  --secondary-bg: #ffffff;
  --secondary-border: #cbd5e1;
  --secondary-hover: #f8fafc;

  background: var(--bg);
  color: var(--text);
}

:root[data-theme="dark"] {
  color-scheme: dark;

  --bg: #0f1623;
  --tint-green: rgba(33, 150, 113, 0.18);
  --tint-amber: rgba(247, 181, 55, 0.12);
  --text: #e6ecf5;
  --text-muted: #9aa6bb;
  --accent: #2bb98a;
  --accent-hover: #34c897;
  --panel-bg: rgba(26, 35, 54, 0.94);
  --panel-border: #2a3550;
  --panel-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  --card-bg: #141d2e;
  --card-border: #283450;
  --secondary-bg: #1f2a40;
  --secondary-border: #38445f;
  --secondary-hover: #243049;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(135deg, var(--tint-green), transparent 34%),
    linear-gradient(225deg, var(--tint-amber), transparent 30%),
    var(--bg);
  color: var(--text);
}

button {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 16px;
}

.generator-panel {
  position: relative;
  width: min(100%, 680px);
  padding: 36px;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: var(--panel-bg);
  box-shadow: var(--panel-shadow);
}

.toolbar {
  position: absolute;
  top: 18px;
  right: 18px;
  display: flex;
  gap: 8px;
}

.toggle-btn {
  min-width: 44px;
  min-height: 44px;
  padding: 0 12px;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--secondary-border);
  border-radius: 22px;
  background: var(--secondary-bg);
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1;
}

.toggle-btn:hover {
  background: var(--secondary-hover);
  transform: translateY(-1px);
}

.intro {
  text-align: center;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.1;
}

.intro p:last-child {
  max-width: 460px;
  margin: 16px auto 0;
  color: var(--text-muted);
  line-height: 1.65;
}

.result-card {
  display: grid;
  gap: 24px;
  margin: 32px 0 24px;
  padding: 28px;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  background: var(--card-bg);
}

.numbers {
  display: grid;
  grid-template-columns: repeat(6, minmax(44px, 1fr));
  gap: 12px;
}

.ball {
  aspect-ratio: 1;
  min-width: 44px;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  background: #f4c542;
  color: #172033;
  font-size: 1.35rem;
  font-weight: 800;
  box-shadow: inset 0 -8px 16px rgba(23, 32, 51, 0.12);
}

.ball.range-1 {
  background: #f8d34f;
}

.ball.range-2 {
  background: #5cb4e8;
  color: #ffffff;
}

.ball.range-3 {
  background: #ef6b67;
  color: #ffffff;
}

.ball.range-4 {
  background: #8f99a8;
  color: #ffffff;
}

.ball.range-5 {
  background: #42b983;
  color: #ffffff;
}

.bonus-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-muted);
  font-weight: 700;
}

.bonus {
  width: 54px;
  background: #172033;
  color: #ffffff;
  font-size: 1.15rem;
}

.controls {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
}

button {
  min-height: 48px;
  border: 0;
  border-radius: 8px;
  padding: 0 22px;
  background: var(--accent);
  color: #ffffff;
  cursor: pointer;
  font-weight: 800;
  transition: transform 0.15s ease, background 0.15s ease;
}

button:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

button:active {
  transform: translateY(0);
}

button.secondary {
  border: 1px solid var(--secondary-border);
  background: var(--secondary-bg);
  color: var(--text);
}

button.secondary:hover {
  background: var(--secondary-hover);
}

.status {
  min-height: 24px;
  margin: 14px 0 0;
  color: var(--accent);
  text-align: center;
  font-weight: 700;
}

@media (max-width: 560px) {
  .generator-panel {
    padding: 24px 18px;
  }

  .result-card {
    padding: 20px;
  }

  .numbers {
    grid-template-columns: repeat(3, minmax(52px, 1fr));
  }

  .controls {
    grid-template-columns: 1fr;
  }
}