/* ============================================================
   K-edu 케이플 — 공용 스타일 (host / play 공유)
   게임쇼 톤: 딥 인디고 + 비비드 액센트. 보기 4색 = 카훗류 색 구분.
   ============================================================ */
:root {
  --kp-ink: #15162e;
  --kp-ink2: #1f2147;
  --kp-paper: #fbfbff;
  --kp-yellow: #ffd23f;
  --kp-coral: #ff5d5d;
  --kp-mint: #2dd4bf;
  --kp-sky: #38bdf8;
  --kp-dim: rgba(255,255,255,.55);
  --kp-c0: #ff5d5d; /* ① 코랄 */
  --kp-c1: #38bdf8; /* ② 하늘 */
  --kp-c2: #ffd23f; /* ③ 노랑 */
  --kp-c3: #2dd4bf; /* ④ 민트 */
  --kp-font: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo',
             'Malgun Gothic', 'Segoe UI', sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: var(--kp-font);
  background:
    radial-gradient(1200px 600px at 80% -10%, #2b2d63 0%, transparent 60%),
    radial-gradient(900px 500px at -10% 110%, #3a1d4d 0%, transparent 55%),
    var(--kp-ink);
  color: var(--kp-paper);
  -webkit-font-smoothing: antialiased;
}
.kp-app { max-width: 1100px; margin: 0 auto; padding: 24px; min-height: 100vh; }

/* ---- 호스트 상단 바 ---- */
.kp-host-bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap; margin-bottom: 28px;
}
.kp-code-box {
  display: flex; align-items: center; gap: 14px;
  background: var(--kp-ink2); border: 2px solid rgba(255,255,255,.08);
  padding: 14px 22px; border-radius: 18px;
}
.kp-code-label { color: var(--kp-dim); font-weight: 700; font-size: 15px; }
.kp-code {
  font-weight: 900; font-size: clamp(34px, 6vw, 58px); letter-spacing: .14em;
  color: var(--kp-yellow); line-height: 1;
}
.kp-join-url { color: var(--kp-dim); font-size: 15px; font-weight: 600; }

/* ---- 무대 ---- */
.kp-stage { text-align: center; padding: 18px 0; }
.kp-big { font-weight: 900; font-size: clamp(40px, 8vw, 84px); margin: 18px 0; }
.kp-dim { color: var(--kp-dim); font-weight: 600; }
.kp-roster { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin: 22px 0 30px; min-height: 44px; }
.kp-chip {
  background: var(--kp-ink2); border: 2px solid rgba(255,255,255,.1);
  padding: 9px 16px; border-radius: 999px; font-weight: 800; font-size: 18px;
  animation: kpPop .25s ease;
}
@keyframes kpPop { from { transform: scale(.7); opacity: 0; } to { transform: scale(1); opacity: 1; } }

.kp-qmeta, .kp-pmeta { color: var(--kp-dim); font-weight: 800; font-size: 18px; margin-bottom: 12px; }
.kp-q { font-weight: 900; font-size: clamp(28px, 5vw, 52px); line-height: 1.25; margin: 10px auto 30px; max-width: 900px; }
.kp-respbar { margin: 22px 0 26px; font-size: 22px; color: var(--kp-dim); }
.kp-respbar b { color: var(--kp-mint); font-size: 30px; }
.kp-top { font-weight: 900; font-size: clamp(24px, 4vw, 38px); color: var(--kp-yellow); margin: 14px 0; }

/* ---- 보기(호스트 큰 격자) ---- */
.kp-choices { display: grid; gap: 16px; max-width: 900px; margin: 0 auto; }
.kp-host-choices { grid-template-columns: 1fr 1fr; }
.kp-choice {
  display: flex; align-items: center; gap: 14px; text-align: left;
  padding: 22px 26px; border-radius: 18px; font-weight: 800;
  font-size: clamp(22px, 3.4vw, 34px); color: var(--kp-ink);
  position: relative; transition: transform .15s, opacity .2s;
}
.kp-c0 { background: var(--kp-c0); } .kp-c1 { background: var(--kp-c1); }
.kp-c2 { background: var(--kp-c2); } .kp-c3 { background: var(--kp-c3); }
.kp-ckey { font-size: 1.2em; font-weight: 900; opacity: .8; }
.kp-cnt { margin-left: auto; font-size: 22px; font-weight: 900; opacity: .85; }
.kp-correct { outline: 5px solid #fff; transform: scale(1.04); }
.kp-faded { opacity: .32; }

/* ---- 버튼 ---- */
.kp-btn {
  border: none; cursor: pointer; font-family: inherit; font-weight: 900;
  border-radius: 16px; transition: transform .12s, filter .12s;
}
.kp-btn:active { transform: translateY(2px); }
.kp-btn:disabled { opacity: .4; cursor: not-allowed; }
.kp-go {
  background: var(--kp-yellow); color: var(--kp-ink);
  font-size: clamp(20px, 3vw, 28px); padding: 18px 44px; margin-top: 10px;
}
.kp-go:hover:not(:disabled) { filter: brightness(1.06); }

/* ============================================================
   참가자(학생 폰)
   ============================================================ */
.kp-gate {
  max-width: 420px; margin: 0 auto; padding: 40px 22px;
  min-height: 100vh; display: flex; flex-direction: column; justify-content: center;
}
.kp-logo { text-align: center; font-weight: 900; font-size: 40px; margin-bottom: 6px; }
.kp-logo span { color: var(--kp-yellow); }
.kp-sub { text-align: center; color: var(--kp-dim); font-weight: 600; margin-bottom: 34px; }
.kp-field { margin-bottom: 18px; }
.kp-field label { display: block; font-weight: 800; margin-bottom: 8px; font-size: 16px; }
.kp-input {
  width: 100%; padding: 18px 18px; border-radius: 16px; border: 2px solid rgba(255,255,255,.14);
  background: var(--kp-ink2); color: #fff; font-size: 22px; font-weight: 800; font-family: inherit;
  text-align: center; outline: none;
}
.kp-input.code { letter-spacing: .22em; text-transform: uppercase; }
.kp-input:focus { border-color: var(--kp-yellow); }
.kp-enter { width: 100%; background: var(--kp-mint); color: var(--kp-ink); font-size: 24px; padding: 20px; margin-top: 10px; }
.kp-err { color: var(--kp-coral); text-align: center; font-weight: 700; min-height: 22px; margin-top: 12px; }

.kp-play { max-width: 480px; margin: 0 auto; padding: 24px 18px; min-height: 100vh; display: flex; flex-direction: column; }
.kp-wait { text-align: center; margin: auto 0; }
.kp-wait-dot {
  width: 54px; height: 54px; border-radius: 50%; margin: 0 auto 20px;
  background: var(--kp-mint); animation: kpPulse 1.1s ease-in-out infinite;
}
@keyframes kpPulse { 0%,100% { transform: scale(.8); opacity: .6; } 50% { transform: scale(1.1); opacity: 1; } }
.kp-pq { font-weight: 900; font-size: 26px; line-height: 1.3; margin: 4px 0 22px; text-align: center; }
.kp-pchoices { display: grid; gap: 14px; margin-top: auto; }
.kp-pbtn {
  display: flex; align-items: center; gap: 12px; text-align: left;
  border: none; padding: 22px 20px; border-radius: 18px; cursor: pointer;
  font-family: inherit; font-weight: 800; font-size: 22px; color: var(--kp-ink);
  transition: transform .12s, filter .12s;
}
.kp-pbtn:active { transform: scale(.97); }
.kp-pbtn.selected { outline: 5px solid #fff; }
.kp-locked { text-align: center; color: var(--kp-mint); font-weight: 800; margin-top: 20px; }
.kp-result { text-align: center; font-weight: 900; font-size: 44px; margin: auto 0 14px; }
.kp-right { color: var(--kp-mint); } .kp-wrong { color: var(--kp-coral); } .kp-noans { color: var(--kp-dim); }
.kp-correctline { text-align: center; font-weight: 800; font-size: 22px; margin-bottom: 10px; }
.kp-myscore { font-weight: 900; font-size: 30px; color: var(--kp-yellow); margin: 14px 0; }

/* 연결 상태 토스트 */
.kp-conn {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: 18px;
  background: var(--kp-ink2); border: 2px solid rgba(255,255,255,.12);
  padding: 10px 18px; border-radius: 999px; font-weight: 700; font-size: 14px;
  color: var(--kp-dim); z-index: 50;
}
.kp-conn.ok { color: var(--kp-mint); }
.kp-conn.err { color: var(--kp-coral); }

/* 스피드 퀴즈 타이머바 */
.kp-timerbar {
  height: 14px; background: rgba(255,255,255,.12); border-radius: 999px;
  overflow: hidden; margin: 0 auto 22px; max-width: 720px;
}
.kp-timerbar.host { max-width: 900px; height: 16px; }
.kp-timerbar span {
  display: block; height: 100%; width: 100%;
  background: linear-gradient(90deg, var(--kp-mint), var(--kp-yellow), var(--kp-coral));
  animation: kpDrain linear forwards;
}
@keyframes kpDrain { from { width: 100%; } to { width: 0%; } }

/* 호스트 게임 선택 */
.kp-pick { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; margin-top: 30px; }
.kp-pick-card {
  background: var(--kp-ink2); border: 2px solid rgba(255,255,255,.1); cursor: pointer;
  border-radius: 22px; padding: 30px 34px; min-width: 220px; transition: transform .12s, border-color .12s;
  font-family: inherit; color: var(--kp-paper);
}
.kp-pick-card:hover { transform: translateY(-4px); border-color: var(--kp-yellow); }
.kp-pick-emoji { font-size: 48px; }
.kp-pick-title { font-weight: 900; font-size: 26px; margin: 10px 0 4px; }
.kp-pick-desc { color: var(--kp-dim); font-weight: 600; font-size: 15px; }

/* 협동 캔버스 */
.kp-draw-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 12px; }
.kp-draw-title { font-weight: 900; font-size: clamp(22px, 3.6vw, 34px); }
.kp-clear { background: var(--kp-ink2); color: var(--kp-paper); border: 2px solid rgba(255,255,255,.14);
  font-size: 18px; padding: 12px 22px; }
.kp-clear:hover { border-color: var(--kp-coral); }
.kp-canvas {
  width: 100%; background: var(--kp-paper); border-radius: 18px; display: block;
  touch-action: none; box-shadow: 0 10px 30px rgba(0,0,0,.25);
}
.kp-canvas.host { height: min(56vh, 520px); }
.kp-canvas.pad { aspect-ratio: 1 / 1; max-height: 62vh; }
.kp-legend { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-top: 14px; font-weight: 700; }
.kp-leg { display: inline-flex; align-items: center; gap: 7px; }
.kp-leg i { width: 16px; height: 16px; border-radius: 5px; display: inline-block; }
.kp-draw-cnt { margin-left: auto; color: var(--kp-dim); font-weight: 800; }

/* 캐치마인드 추측 입력 */
.kp-guess-row { margin-top: 22px; }

/* ── 살아나는 무대 (live_stage) ── */
.kp-ls-stages { display: flex; gap: 6px; flex-wrap: wrap; }
.kp-btn.kp-ls-stage { padding: 7px 13px; font-size: 14px; opacity: .72; }
.kp-btn.kp-ls-stage.on { opacity: 1; outline: 2px solid var(--kp-yellow); }
.kp-ls-count { font-weight: 700; }
.kp-ls-tools { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 9px; align-items: center; }
.kp-ls-label { margin-top: 13px; font-size: 13px; opacity: .72; }
.kp-sw { width: 30px; height: 30px; border-radius: 50%; border: 3px solid rgba(255,255,255,.45);
  box-shadow: 0 0 0 1px rgba(0,0,0,.3); cursor: pointer; padding: 0; flex-shrink: 0; }
.kp-sw.on { border-color: #fff; transform: scale(1.14); }
.kp-btn.kp-ls-send { width: 100%; margin-top: 16px; padding: 15px; font-size: 17px; }
/* 학생 패드는 무대와 같은 화폭 비율(4:3) — 전자칠판에서 같은 그림이 되도록 */
.kp-canvas.pad.ls { aspect-ratio: auto; }