:root {
  --bg-color: #f7f9fc;
  --container-bg: #ffffff;
  --text-main: #2d3436;
  --text-sub: #636e72;
  --accent-color: #6c5ce7;
  --accent-hover: #8072e9;
  --accent-shadow: #4834d4;
  --border-color: #ecf0f1;
  
  --ball-yellow: #feca57;
  --ball-blue: #48dbfb;
  --ball-red: #ff6b6b;
  --ball-grey: #a4b0be;
  --ball-green: #1dd1a1;
  
  --placeholder-bg: #f1f2f6;
  --placeholder-text: #ced6e0;
}

[data-theme="dark"] {
  --bg-color: #1e272e;
  --container-bg: #2f3542;
  --text-main: #f1f2f6;
  --text-sub: #a4b0be;
  --accent-shadow: #3c30a0;
  --border-color: #3d4451;
  
  --placeholder-bg: #353b48;
  --placeholder-text: #747d8c;
}

* { box-sizing: border-box; }

body {
  font-family: 'Pretendard', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  overflow: hidden; 
  transition: background-color 0.3s ease;
}

/* Side Controls */
.side-controls {
  position: fixed;
  top: 15px;
  right: 15px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
  z-index: 100;
  max-height: 95vh;
  overflow-y: auto;
  padding-right: 5px;
}

#theme-toggle, .toggle-card-btn {
  background-color: var(--container-bg);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  transition: all 0.2s ease;
}

.inquiry-card, .comments-card {
  background-color: var(--container-bg);
  border-radius: 18px;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
  overflow: hidden;
  width: 200px;
  transition: width 0.3s ease;
}

.comments-card.active {
  width: 350px;
}

.toggle-card-btn {
  width: 100%;
  border: none;
  border-radius: 0;
  background: none;
  box-shadow: none;
  text-align: right;
  padding: 10px 15px;
}

.inquiry-content, .comments-content {
  max-height: 0;
  padding: 0 15px;
  transition: all 0.3s ease;
  opacity: 0;
  overflow-y: auto;
}

.inquiry-card.active .inquiry-content {
  max-height: 300px;
  padding: 10px 15px 15px 15px;
  opacity: 1;
}

.comments-card.active .comments-content {
  max-height: 60vh;
  padding: 10px 15px 15px 15px;
  opacity: 1;
}

.inquiry-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.inquiry-form input, .inquiry-form textarea {
  width: 100%;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-color);
  color: var(--text-main);
  font-size: 0.8rem;
}

.inquiry-form textarea { height: 50px; resize: none; }

.submit-btn {
  padding: 8px;
  border-radius: 8px;
  border: none;
  background-color: var(--accent-color);
  color: white;
  font-weight: 600;
  cursor: pointer;
}

/* Main UI */
.main-container {
  background-color: var(--container-bg);
  width: 95%;
  max-width: 500px;
  padding: 20px;
  border-radius: 24px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  text-align: center;
  transition: background-color 0.3s ease;
  display: flex;
  flex-direction: column;
  max-height: 98vh;
}

header h1 { margin: 0 0 5px 0; font-size: 1.5rem; font-weight: 700; }
.subtitle { color: var(--text-sub); margin-bottom: 15px; font-size: 0.85rem; }
h3 { font-size: 0.9rem; color: var(--text-sub); margin: 0 0 10px 0; font-weight: 600; }
.divider { border: none; border-top: 1px solid var(--border-color); margin: 15px 0; }

.winning-display, .display-area { display: flex; flex-direction: column; gap: 8px; margin-bottom: 10px; }

.lotto-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  padding: 8px;
  background-color: var(--bg-color);
  border-radius: 14px;
  border: 1px solid var(--border-color);
  animation: fadeIn 0.4s ease forwards;
}

.plus-sign { font-size: 1.2rem; font-weight: 700; color: var(--text-sub); margin: 0 2px; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }

.ball {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  flex-shrink: 0;
  aspect-ratio: 1 / 1;
}

.ball.placeholder { background-color: var(--placeholder-bg); color: var(--placeholder-text); box-shadow: none; }
.ball.num-1-10 { background-color: var(--ball-yellow); }
.ball.num-11-20 { background-color: var(--ball-blue); }
.ball.num-21-30 { background-color: var(--ball-red); }
.ball.num-31-40 { background-color: var(--ball-grey); }
.ball.num-41-45 { background-color: var(--ball-green); }

#generate-btn {
  width: 100%;
  padding: 14px;
  font-size: 1.05rem;
  font-weight: 700;
  border: none;
  border-radius: 14px;
  background-color: var(--accent-color);
  color: white;
  cursor: pointer;
  position: relative;
  transition: all 0.1s ease;
  box-shadow: 0 5px 0 var(--accent-shadow), 0 6px 10px rgba(0,0,0,0.15);
  margin-top: 5px;
}

#generate-btn:hover { background-color: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 6px 0 var(--accent-shadow), 0 7px 12px rgba(0,0,0,0.2); }
#generate-btn:active { transform: translateY(3px); box-shadow: 0 2px 0 var(--accent-shadow), 0 3px 6px rgba(0,0,0,0.1); }

@media (max-width: 500px) {
  .side-controls { top: 10px; right: 10px; }
  .inquiry-card, .comments-card { width: 140px; }
  .comments-card.active { width: 260px; }
  .ball { width: 34px; height: 34px; font-size: 0.9rem; }
}