:root {
  --bg-1: #071229;
  --bg-2: #102a43;
  --card-bg: rgba(255, 255, 255, 0.08);
  --card-border: rgba(255, 255, 255, 0.2);
  --text-main: #f8fbff;
  --text-sub: #c3d3ea;
  --btn: #ffb703;
  --btn-hover: #ffca3a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  color: var(--text-main);
  background: radial-gradient(circle at top right, #16355c 0%, transparent 45%),
    linear-gradient(145deg, var(--bg-1), var(--bg-2));
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 24px;
}

.container {
  width: min(900px, 100%);
}

h1 {
  margin: 0 0 20px;
  text-align: center;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 20px;
  backdrop-filter: blur(5px);
}

.card + .card {
  margin-top: 16px;
}

h2 {
  margin: 0 0 14px;
  font-size: 1.1rem;
  color: var(--text-sub);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.card-header h2 {
  margin: 0;
}

#generate-btn {
  border: none;
  background: var(--btn);
  color: #1c1c1c;
  font-weight: 700;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
}

#generate-btn:hover {
  background: var(--btn-hover);
}

.summary {
  margin: 0 0 12px;
  font-weight: 700;
}

.numbers-row,
.lotto-set {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

#lotto-sets-container {
  display: grid;
  gap: 10px;
}

.lotto-set {
  padding: 10px;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background: rgba(255, 255, 255, 0.04);
}

.set-label {
  min-width: 62px;
  font-size: 0.92rem;
  color: var(--text-sub);
  font-weight: 700;
}

.number {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #132238;
  background: linear-gradient(160deg, #ffffff, #c9def8);
}

.number.bonus {
  background: linear-gradient(160deg, #ffe29a, #ffc046);
  color: #4e3000;
}

.plus-sign {
  font-weight: 800;
  margin: 0 2px;
}

.loading,
.error {
  margin: 0;
  color: var(--text-sub);
}

.source {
  margin: 14px 2px 0;
  font-size: 0.85rem;
  color: var(--text-sub);
}

.source a {
  color: #ffd166;
}

@media (max-width: 640px) {
  body {
    padding: 14px;
  }

  .card {
    padding: 14px;
  }

  .card-header {
    flex-direction: column;
    align-items: flex-start;
  }
}