:root{
  --bg: #0B1220;
  --bg-soft: #10192E;
  --panel: #131E36;
  --line: rgba(240,244,255,0.09);
  --ink: #EDEFF7;
  --ink-dim: #8B94AE;

  --ball-1: #FBC400; /* 1-10 노랑 */
  --ball-2: #69C8F2; /* 11-20 파랑 */
  --ball-3: #FF7272; /* 21-30 빨강 */
  --ball-4: #AAAAAA; /* 31-40 회색 */
  --ball-5: #B0D840; /* 41-45 초록 */
}

:root[data-theme="light"]{
  --bg: #F5F7FB;
  --bg-soft: #FFFFFF;
  --panel: #FFFFFF;
  --line: rgba(20,26,45,0.09);
  --ink: #1B2436;
  --ink-dim: #6B7690;
}

*{ box-sizing: border-box; }
html,body{ margin:0; padding:0; }
body{
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(105,200,242,0.10), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(251,196,0,0.07), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: 'Noto Sans KR', sans-serif;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.wrap{
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 24px 100px;
}

header{
  display:flex;
  align-items:center;
  justify-content: space-between;
  margin-bottom: 48px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:'Space Grotesk', sans-serif;
  font-weight:700;
  letter-spacing: 0.02em;
  font-size: 15px;
  color: var(--ink-dim);
  text-decoration: none;
}
.brand-dot{
  width:8px;height:8px;border-radius:50%;
  background: var(--ball-2);
  box-shadow: 0 0 12px var(--ball-2);
}
.header-right{
  display:flex;
  align-items:center;
  gap:10px;
}
.date-tag{
  font-family:'Space Grotesk', sans-serif;
  font-size:13px;
  color: var(--ink-dim);
  border: 1px solid var(--line);
  padding: 6px 12px;
  border-radius: 100px;
}
.theme-toggle{
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  font-size: 15px;
  display:flex;
  align-items:center;
  justify-content:center;
  padding: 0;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.theme-toggle:hover{ border-color: rgba(240,244,255,0.25); transform: translateY(-1px); }

.hero{
  margin-bottom: 40px;
}
.eyebrow{
  font-family:'Space Grotesk', sans-serif;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ball-1);
  margin: 0 0 14px;
  font-weight: 600;
}
h1{
  font-family:'Space Grotesk', sans-serif;
  font-size: clamp(32px, 6vw, 48px);
  line-height: 1.15;
  font-weight: 700;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}
h1 span{
  background: linear-gradient(92deg, var(--ball-1), var(--ball-2) 55%, var(--ball-5));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.sub{
  color: var(--ink-dim);
  font-size: 15.5px;
  line-height: 1.7;
  max-width: 480px;
  margin: 0;
}

/* 번호 표시판 */
.stage{
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 40px 28px 32px;
  margin: 36px 0 20px;
  overflow: hidden;
}
.stage::before{
  content:'';
  position:absolute; inset:0;
  background: radial-gradient(500px 200px at 50% -20%, rgba(255,255,255,0.05), transparent 70%);
  pointer-events:none;
}

.balls{
  display:flex;
  flex-direction: column;
  gap: 14px;
  min-height: 92px;
}

.ball-set-row{
  display:flex;
  align-items:center;
  gap: 10px;
}
.set-label{
  width: 44px;
  flex-shrink: 0;
  font-family:'Space Grotesk', sans-serif;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-dim);
}
.set-balls{
  display:flex;
  gap: 9px;
  flex-wrap: wrap;
}

.ball{
  --c: var(--ball-1);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 16px;
  color: #10192E;
  background:
    radial-gradient(circle at 32% 28%, rgba(255,255,255,0.85), rgba(255,255,255,0) 42%),
    var(--c);
  box-shadow:
    0 4px 10px rgba(0,0,0,0.35),
    inset 0 -4px 7px rgba(0,0,0,0.18);
  opacity: 0;
  transform: translateY(14px) scale(0.6);
  transition: opacity 0.35s ease, transform 0.45s cubic-bezier(.34,1.56,.64,1);
  flex-shrink: 0;
}
.ball.show{
  opacity: 1;
  transform: translateY(0) scale(1);
}
.ball.rolling{
  animation: roll 0.55s ease-in-out infinite;
}
@keyframes roll{
  0%,100%{ transform: translateY(0) rotate(0deg); }
  50%{ transform: translateY(-6px) rotate(8deg); }
}

.placeholder-row{
  display:flex;
  gap:12px;
  justify-content:center;
  color: var(--ink-dim);
  font-family:'Space Grotesk', sans-serif;
  font-size: 13px;
}

.legend{
  display:flex;
  justify-content:center;
  gap: 16px;
  margin-top: 24px;
  flex-wrap: wrap;
}
.legend-item{
  display:flex;
  align-items:center;
  gap:6px;
  font-size: 12px;
  color: var(--ink-dim);
  font-family:'Space Grotesk', sans-serif;
}
.legend-dot{
  width:9px;height:9px;border-radius:50%;
}

.controls{
  display:flex;
  gap:12px;
  margin-top: 8px;
  align-items:center;
}
button{
  font-family:'Noto Sans KR', sans-serif;
  cursor:pointer;
  border:none;
  outline: none;
}
.btn-primary{
  flex:1;
  background: linear-gradient(92deg, var(--ball-1), #f2a900);
  color: #16110a;
  font-weight: 700;
  font-size: 16px;
  padding: 17px 20px;
  border-radius: 14px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 8px 20px rgba(251,196,0,0.18);
}
.btn-primary:hover{ transform: translateY(-1px); box-shadow: 0 10px 26px rgba(251,196,0,0.26); }
.btn-primary:active{ transform: translateY(0px) scale(0.99); }
.btn-primary:disabled{ opacity:0.6; cursor:default; transform:none; }

.btn-ghost{
  background: transparent;
  border: 1px solid var(--line) !important;
  color: var(--ink-dim);
  font-size: 14px;
  padding: 17px 18px;
  border-radius: 14px;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.btn-ghost:hover{ border-color: rgba(240,244,255,0.25) !important; color: var(--ink); }

/* 옵션 */
.options{
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.options-title{
  font-size: 13px;
  color: var(--ink-dim);
  margin-bottom: 12px;
  font-family:'Space Grotesk', sans-serif;
}
.num-grid{
  display:grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 6px;
}
.num-cell{
  aspect-ratio: 1;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
  color: var(--ink-dim);
  font-family:'Space Grotesk', sans-serif;
  font-size: 12px;
  display:flex;
  align-items:center;
  justify-content:center;
  transition: all 0.15s ease;
}
.num-cell.excluded{
  background: rgba(255,114,114,0.12);
  border-color: rgba(255,114,114,0.4);
  color: #FF9E9E;
  text-decoration: line-through;
}
.hint{
  font-size: 12px;
  color: var(--ink-dim);
  margin-top: 10px;
  line-height: 1.6;
}

/* 히스토리 */
.history{
  margin-top: 36px;
}
.history-title{
  font-family:'Space Grotesk', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-dim);
  margin-bottom: 14px;
  display:flex;
  justify-content: space-between;
  align-items:center;
}
.history-clear{
  font-family:'Noto Sans KR', sans-serif;
  background:none;
  border:none;
  color: var(--ink-dim);
  font-size: 12px;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.history-clear:hover{ color: var(--ink); }
.history-list{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.history-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 16px;
}
.history-nums{
  display:flex;
  gap:8px;
}
.mini-ball{
  width:30px; height:30px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-family:'Space Grotesk', sans-serif;
  font-size: 12px;
  font-weight:700;
  color:#10192E;
}
.history-time{
  font-family:'Space Grotesk', sans-serif;
  font-size: 11px;
  color: var(--ink-dim);
}
.empty-history{
  color: var(--ink-dim);
  font-size: 13px;
  padding: 18px 4px;
  text-align:center;
  border: 1px dashed var(--line);
  border-radius: 12px;
}

.comments{
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.comments .history-title{ margin-bottom: 18px; }

.info-section{
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.info-section h2{
  font-family: 'Space Grotesk', sans-serif;
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 14px;
}
.info-section p{
  color: var(--ink-dim);
  font-size: 14px;
  line-height: 1.8;
  margin: 0 0 14px;
}
.info-section p:last-of-type{ margin-bottom: 0; }

.faq{
  margin: 20px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.faq dt{
  font-weight: 600;
  font-size: 14px;
  color: var(--ink);
  margin-bottom: 6px;
}
.faq dd{
  margin: 0;
  color: var(--ink-dim);
  font-size: 13.5px;
  line-height: 1.75;
}

footer{
  margin-top: 56px;
  text-align:center;
  color: var(--ink-dim);
  font-size: 12px;
  line-height:1.7;
}
.footer-link{
  color: var(--ink-dim);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.footer-link:hover{ color: var(--ink); }

@media (prefers-reduced-motion: reduce){
  .ball, .ball.rolling{ animation: none !important; transition: none !important; }
}

@media (max-width: 480px){
  .ball{ width: 36px; height:36px; font-size:13px; }
  .set-label{ width: 36px; font-size: 11px; }
  .set-balls{ gap: 6px; }
  .num-grid{ grid-template-columns: repeat(7, 1fr); }
  .wrap{ padding: 44px 16px 80px; }
}