* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
}
body {
  font-family: Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", "Malgun Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}
#app { min-height: 100vh; }
.view { display: none; min-height: 100vh; }
.view.active { display: block; }

/* 로그인 */
#loginView { display: none; align-items: center; justify-content: center; padding: 20px; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
#loginView.active { display: flex; }
.login-box { background: var(--card); border-radius: 16px; padding: 40px 32px; width: 100%; max-width: 400px; }
.logo { font-size: 32px; text-align: center; margin-bottom: 8px; }
.subtitle { text-align: center; color: var(--muted); margin-bottom: 24px; }
.form { display: flex; flex-direction: column; gap: 8px; }
.form label { font-size: 13px; color: var(--muted); margin-top: 8px; }
.form input {
  padding: 12px 14px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 15px; font-family: inherit;
}
.form input:focus { outline: 2px solid var(--primary); border-color: var(--primary); }
.hint { text-align: center; color: var(--muted); font-size: 13px; margin-top: 16px; }
.msg { text-align: center; font-size: 13px; min-height: 18px; margin-top: 8px; }
.msg.err { color: var(--danger); }
.msg.ok { color: var(--success); }

/* 버튼 */
.btn-primary {
  background: var(--primary); color: white; border: none; border-radius: 8px;
  padding: 12px 20px; font-size: 15px; font-weight: 600; cursor: pointer;
  font-family: inherit; margin-top: 12px;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-ghost {
  background: transparent; color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 14px; font-size: 13px; cursor: pointer;
  font-family: inherit;
}
.btn-ghost:hover { background: var(--bg); }
.btn-danger {
  background: var(--danger); color: white; border: none; border-radius: 6px;
  padding: 6px 12px; font-size: 12px; cursor: pointer; font-family: inherit;
}
.btn-small {
  background: var(--primary); color: white; border: none; border-radius: 6px;
  padding: 6px 12px; font-size: 12px; cursor: pointer; font-family: inherit;
  margin-right: 6px;
}

/* 상단바 */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; background: var(--card); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-size: 18px; font-weight: 700; }
.topbar-right { display: flex; align-items: center; gap: 8px; }
.badge {
  background: var(--bg); color: var(--text); padding: 6px 12px;
  border-radius: 6px; font-size: 13px; font-weight: 500;
  border: 1px solid var(--border);
}
.badge.coin { background: #fef3c7; border-color: #fcd34d; }

/* 관리자 */
.admin-main { padding: 20px; max-width: 1100px; margin: 0 auto; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 20px; margin-bottom: 16px;
}
.card h2 { font-size: 16px; margin-bottom: 12px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; }
.row input { flex: 1; min-width: 120px; padding: 10px; border: 1px solid var(--border); border-radius: 6px; font-family: inherit; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 8px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--bg); font-weight: 600; font-size: 13px; }
th.num, td.num { text-align: right; }

/* 홈 타일 */
.home-main { padding: 24px 20px; max-width: 1000px; margin: 0 auto; }
.tile-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.tile {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 24px; text-align: left; cursor: pointer; font-family: inherit;
  transition: transform 0.15s, border-color 0.15s;
}
.tile:hover { transform: translateY(-2px); border-color: var(--primary); }
.tile-icon { font-size: 40px; margin-bottom: 12px; }
.tile-title { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.tile-desc { font-size: 13px; color: var(--muted); }

/* 학습 */
.learn-main { padding: 20px; max-width: 900px; margin: 0 auto; }
.tab-row { display: flex; gap: 4px; margin-bottom: 16px; border-bottom: 1px solid var(--border); }
.tab {
  padding: 10px 16px; background: transparent; border: none; cursor: pointer;
  font-size: 14px; font-family: inherit; color: var(--muted);
  border-bottom: 2px solid transparent;
}
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.learn-cards {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 10px;
}
.learn-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px 8px; text-align: center; cursor: pointer; position: relative;
  transition: transform 0.1s;
}
.learn-card:hover { transform: scale(1.03); border-color: var(--primary); }
.learn-card .char { font-size: 32px; font-weight: 700; }
.learn-card .word { font-size: 20px; font-weight: 600; }
.learn-card .emoji { font-size: 32px; }
.learn-card .label { font-size: 12px; color: var(--muted); margin-top: 4px; }
.learn-card .learned-mark {
  position: absolute; top: 4px; right: 4px; font-size: 16px;
}

/* 배틀 */
.battle-main { padding: 20px; max-width: 800px; margin: 0 auto; }
.stage-info { display: flex; gap: 8px; align-items: center; margin-bottom: 16px; flex-wrap: wrap; }
.battle-scene {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 20px; margin-bottom: 16px;
}
.monster { text-align: center; margin-bottom: 20px; }
.monster-emoji { font-size: 80px; margin-bottom: 8px; transition: transform 0.2s; }
.monster-emoji.hit { animation: shake 0.4s; }
@keyframes shake { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-10px)} 75%{transform:translateX(10px)} }
.hp-bar {
  background: #e5e7eb; height: 16px; border-radius: 8px; overflow: hidden;
  max-width: 400px; margin: 0 auto;
}
.hp-bar.small { height: 10px; }
.hp-fill { height: 100%; background: var(--success); transition: width 0.4s; }
.hp-fill.enemy { background: var(--danger); }
.hp-text { text-align: center; font-size: 13px; color: var(--muted); margin-top: 4px; }
.player { text-align: center; }
.player-avatar { font-size: 48px; margin-bottom: 8px; }
.player-avatar.small { font-size: 32px; margin-bottom: 4px; }
.players-row { display: flex; justify-content: space-around; gap: 16px; }
.player-name { font-size: 13px; font-weight: 600; margin-bottom: 4px; }

.question {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 24px; text-align: center; font-size: 24px; font-weight: 600;
  margin-bottom: 12px; min-height: 100px; display: flex; align-items: center; justify-content: center;
}
.question .big { font-size: 48px; }
.choices {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
}
.choice {
  background: var(--card); border: 2px solid var(--border); border-radius: 10px;
  padding: 20px; font-size: 20px; font-weight: 600; cursor: pointer;
  font-family: inherit; transition: all 0.1s;
}
.choice:hover { border-color: var(--primary); background: #eef2ff; }
.choice.correct { border-color: var(--success); background: #d1fae5; }
.choice.wrong { border-color: var(--danger); background: #fee2e2; }
.choice:disabled { cursor: not-allowed; }
.feedback { text-align: center; margin-top: 12px; font-size: 15px; min-height: 24px; font-weight: 600; }
.feedback.ok { color: var(--success); }
.feedback.err { color: var(--danger); }

/* 퀴즈 */
.quiz-main { padding: 20px; max-width: 700px; margin: 0 auto; }
.quiz-progress { margin-bottom: 16px; }
.progress-bar { background: #e5e7eb; height: 10px; border-radius: 5px; overflow: hidden; margin-bottom: 6px; }
.progress-fill { height: 100%; background: var(--primary); transition: width 0.3s; width: 0%; }
.progress-text { text-align: right; font-size: 13px; color: var(--muted); }
.quiz-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 32px; text-align: center; margin-bottom: 16px;
  min-height: 160px; display: flex; align-items: center; justify-content: center;
}
.quiz-card .big-emoji { font-size: 96px; }
.quiz-card .big-word { font-size: 60px; font-weight: 700; }
.quiz-choices { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
/* 제한 시간 표시 */
.timer { margin-left: 10px; font-weight: 700; color: var(--primary); }
.timer.danger { color: var(--danger); }

/* 로비 */
.lobby-main { padding: 40px 20px; max-width: 700px; margin: 0 auto; }
.lobby-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.lobby-tile {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 32px 20px; text-align: center; cursor: pointer; font-family: inherit;
  transition: transform 0.15s, border-color 0.15s;
}
.lobby-tile:hover { transform: translateY(-2px); border-color: var(--primary); }

/* 대기 */
.wait-main { display: flex; align-items: center; justify-content: center; padding: 40px 20px; min-height: 60vh; }
.waiting-box { text-align: center; background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 40px; }
.waiting-anim { font-size: 72px; animation: bounce 1.5s infinite; }
@keyframes bounce { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }
.waiting-box p { margin-top: 12px; color: var(--muted); }

/* 상점 */
.shop-main { padding: 20px; max-width: 900px; margin: 0 auto; }
.shop-preview {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 24px; text-align: center; margin-bottom: 16px;
}
.avatar-large { font-size: 80px; }
.avatar-mini { font-size: 24px; }
.shop-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; }
.shop-item {
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px 8px; text-align: center; cursor: pointer;
}
.shop-item .preview { font-size: 42px; margin-bottom: 6px; }
.shop-item .name { font-size: 13px; font-weight: 600; margin-bottom: 4px; }
.shop-item .price { font-size: 12px; color: var(--warning); }
.shop-item.owned { border-color: var(--success); }
.shop-item.equipped { border-color: var(--primary); background: #eef2ff; }
.shop-item button {
  margin-top: 6px; padding: 4px 10px; font-size: 11px; border-radius: 4px;
  border: none; background: var(--primary); color: white; cursor: pointer;
  font-family: inherit;
}
.shop-item button:disabled { background: #ccc; cursor: not-allowed; }

/* 모달 */
.modal { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 100; align-items: center; justify-content: center; padding: 20px; }
.modal.active { display: flex; }
.modal-box { background: var(--card); border-radius: 12px; padding: 24px; width: 100%; max-width: 420px; max-height: 90vh; overflow-y: auto; }
.modal-box.wide { max-width: 700px; }
.modal-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.modal-head h3 { font-size: 18px; }
.modal-foot { margin-top: 16px; text-align: right; }
.word-check-cat { margin-top: 12px; }
.word-check-cat h4 { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.word-check-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 6px; }
.word-check-item {
  display: flex; align-items: center; gap: 6px; padding: 6px 8px;
  border: 1px solid var(--border); border-radius: 6px; font-size: 13px; cursor: pointer;
}
.word-check-item input { cursor: pointer; }

/* 토스트 */
.toast {
  position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: white; padding: 12px 20px; border-radius: 8px;
  font-size: 14px; opacity: 0; pointer-events: none; transition: opacity 0.2s;
  z-index: 200;
}
.toast.show { opacity: 1; }

/* 반응형 */
@media (max-width: 600px) {
  .choices, .quiz-choices { grid-template-columns: repeat(2, 1fr); }
  .choice { padding: 14px 8px; font-size: 17px; }
  .lobby-grid { grid-template-columns: 1fr; }
  .tile-grid { grid-template-columns: 1fr 1fr; }
  .brand { font-size: 15px; }
}