:root {
  --bg1: #0b1026;
  --bg2: #1b2350;
  --gold: #ffd479;
  --red: #e8523f;
  --jade: #7fd1ae;
  --ink: #f5f1e6;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 50% 18%, #2a3470 0%, var(--bg2) 38%, var(--bg1) 100%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: hidden;
}

/* 夜空装饰 */
.sky { position: fixed; inset: 0; pointer-events: none; z-index: 0; }
.moon {
  position: absolute; top: 6%; left: 50%; transform: translateX(-50%);
  font-size: 76px; filter: drop-shadow(0 0 24px rgba(255, 212, 121, 0.55));
  animation: float 6s ease-in-out infinite;
}
.clouds { position: absolute; top: 22%; right: 8%; font-size: 34px; opacity: 0.5; }
@keyframes float { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(10px); } }

.app {
  position: relative; z-index: 1;
  width: 100%; max-width: 460px;
  padding: 24px 18px 40px;
  flex: 1;
  display: flex; flex-direction: column; justify-content: center;
}

.screen { display: flex; flex-direction: column; align-items: center; gap: 18px; animation: fade .4s ease; }
.hidden { display: none !important; }
@keyframes fade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.title {
  font-size: 40px; letter-spacing: 6px; color: var(--gold);
  text-shadow: 0 2px 18px rgba(255, 212, 121, 0.4);
}
.subtitle { font-size: 15px; opacity: 0.9; text-align: center; }
.hint { font-size: 12px; opacity: 0.6; text-align: center; margin-top: 4px; }

.name-input {
  width: 100%; max-width: 320px; padding: 12px 14px; border-radius: 12px;
  border: 1px solid rgba(255, 212, 121, 0.4); background: rgba(255, 255, 255, 0.06);
  color: var(--ink); font-size: 14px; text-align: center; outline: none;
}
.name-input::placeholder { color: rgba(245, 241, 230, 0.45); }

.btn {
  width: 100%; max-width: 320px; padding: 14px; border: none; border-radius: 14px;
  background: linear-gradient(135deg, #ff8a5b, var(--red));
  color: #fff; font-size: 17px; font-weight: 600; letter-spacing: 2px;
  cursor: pointer; box-shadow: 0 8px 22px rgba(232, 82, 63, 0.4);
  transition: transform .15s ease;
}
.btn:active { transform: scale(0.97); }
.btn-ghost {
  background: transparent; border: 1px solid rgba(255, 212, 121, 0.5);
  color: var(--gold); box-shadow: none;
}

/* 游戏页 */
.topbar { width: 100%; display: flex; justify-content: space-between; align-items: center; }
.level { font-size: 15px; color: var(--gold); }
.lanterns { font-size: 20px; letter-spacing: 2px; }
.lantern { filter: grayscale(1) brightness(0.5); transition: filter .4s ease, transform .4s ease; display: inline-block; }
.lantern.lit { filter: none; transform: scale(1.15); }

.riddle-card {
  width: 100%; background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 212, 121, 0.25); border-radius: 18px;
  padding: 26px 20px; backdrop-filter: blur(4px);
}
.riddle { font-size: 20px; line-height: 1.7; text-align: center; }

.options { width: 100%; display: flex; flex-direction: column; gap: 12px; }
.option {
  width: 100%; padding: 15px; border-radius: 14px; border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.05); color: var(--ink); font-size: 16px;
  cursor: pointer; transition: all .15s ease; text-align: left;
}
.option:hover { border-color: var(--gold); }
.option.correct { background: rgba(127, 209, 174, 0.3); border-color: var(--jade); }
.option.wrong { background: rgba(232, 82, 63, 0.3); border-color: var(--red); }
.option.reveal { box-shadow: 0 0 0 2px var(--jade) inset; }
.option:disabled { cursor: default; }

.feedback { min-height: 20px; font-size: 14px; text-align: center; }
.feedback.ok { color: var(--jade); }
.feedback.bad { color: var(--gold); }

/* 贺卡页 */
.greet-card {
  width: 100%; background: linear-gradient(160deg, rgba(255, 212, 121, 0.14), rgba(232, 82, 63, 0.12));
  border: 1px solid rgba(255, 212, 121, 0.4); border-radius: 22px;
  padding: 30px 22px; display: flex; flex-direction: column; align-items: center; gap: 14px;
}
.greet-moon { font-size: 56px; filter: drop-shadow(0 0 18px rgba(255, 212, 121, 0.5)); }
.greet-title { color: var(--gold); letter-spacing: 4px; font-size: 22px; }
.card-lanterns { font-size: 22px; letter-spacing: 3px; }
.blessing { font-size: 22px; line-height: 1.6; text-align: center; color: var(--ink); }
.greet-foot { font-size: 12px; opacity: 0.6; }