/* =========================================================
   蛇蛇大作战 · 样式表
   ========================================================= */

*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html,body{height:100%;overflow:hidden}
body{
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  background:#070b14;color:#e8eefc;
  background-image:radial-gradient(circle at 20% 10%,rgba(80,140,255,.16),transparent 45%),
                   radial-gradient(circle at 85% 85%,rgba(120,60,220,.16),transparent 45%);
}
button{font-family:inherit;cursor:pointer;border:none;outline:none}
input{font-family:inherit;outline:none}

/* ---------- 屏幕容器 ---------- */
.screen{position:fixed;inset:0;display:none;flex-direction:column}
.screen.active{display:flex}

/* ---------- 卡片 ---------- */
.card{
  background:rgba(20,29,48,.78);border:1px solid rgba(96,140,210,.18);
  border-radius:18px;padding:20px;backdrop-filter:blur(12px);
  box-shadow:0 8px 32px rgba(0,0,0,.35);
}
h1{font-size:38px;letter-spacing:4px;
   background:linear-gradient(90deg,#5ee7a0,#5bc8ff,#a78bfa);
   -webkit-background-clip:text;background-clip:text;color:transparent;font-weight:800}
h2{font-size:16px;font-weight:700;color:#b9cdf0;margin-bottom:12px;display:flex;align-items:center;gap:8px}
h2 .cnt{font-size:12px;color:#6c85ad;font-weight:500}

/* ---------- 按钮 / 输入框 ---------- */
.btn{
  padding:14px 22px;border-radius:12px;font-size:16px;font-weight:700;
  background:linear-gradient(135deg,#3ecf8e,#2aa9e0);color:#04121a;
  transition:.18s;letter-spacing:1px;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(62,207,142,.35)}
.btn:active{transform:translateY(0)}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.btn.ghost{
  background:transparent;border:1px solid rgba(96,140,210,.3);color:#9fb6d8;
  padding:8px 14px;font-size:13px;font-weight:600;
}
.btn.ghost:hover{background:rgba(96,140,210,.12);color:#e8eefc;transform:none;box-shadow:none}

input[type=text],input[type=tel]{
  width:100%;padding:14px 16px;border-radius:12px;
  background:rgba(10,16,28,.9);border:1px solid rgba(96,140,210,.25);
  color:#e8eefc;font-size:16px;transition:.2s;
}
input:focus{border-color:#5bc8ff;box-shadow:0 0 0 3px rgba(91,200,255,.15)}
input::placeholder{color:#4d6284}

/* =========================================================
   1. 取名页
   ========================================================= */
#scr-name{align-items:center;justify-content:center;padding:24px}
#scr-name .card{width:100%;max-width:420px;text-align:center;padding:36px 28px}
.logo{
  font-size:64px;line-height:1;margin-bottom:14px;
  filter:drop-shadow(0 0 24px rgba(94,231,160,.5));
  animation:float 3s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.sub{color:#7d94b8;font-size:13px;margin:10px 0 26px;letter-spacing:1px}
.field{display:flex;flex-direction:column;gap:12px}

/* =========================================================
   2. 主菜单
   ========================================================= */
#scr-menu{padding:22px;gap:16px;overflow-y:auto}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:4px 4px 0;flex-wrap:wrap;gap:10px}
.me{font-size:15px;color:#b9cdf0;display:flex;align-items:center;gap:6px}
.me b{color:#5ee7a0}
.status{
  font-size:12px;padding:5px 12px;border-radius:20px;
  background:rgba(62,207,142,.14);color:#5ee7a0;border:1px solid rgba(62,207,142,.3);
}
.status.off{background:rgba(255,90,90,.14);color:#ff7b7b;border-color:rgba(255,90,90,.3)}

.menu-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:720px){.menu-grid{grid-template-columns:1fr}}
.menu-grid .card p{color:#7d94b8;font-size:13px;margin-bottom:16px;line-height:1.6}

.row{display:flex;gap:10px}
.row input{flex:1;letter-spacing:6px;text-align:center;font-size:20px;font-weight:700;padding:12px}
.row .btn{padding:12px 20px;white-space:nowrap}

.devices{flex:1;min-height:170px;display:flex;flex-direction:column}
.devices ul{
  list-style:none;overflow-y:auto;flex:1;max-height:260px;
  display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px;align-content:start;
}
.devices li{
  display:flex;align-items:center;gap:8px;padding:10px 12px;border-radius:10px;
  background:rgba(10,16,28,.65);border:1px solid rgba(96,140,210,.12);font-size:14px;
}
.devices li.self{border-color:rgba(94,231,160,.45);background:rgba(62,207,142,.1)}
.dot{width:8px;height:8px;border-radius:50%;background:#3ecf8e;box-shadow:0 0 8px #3ecf8e;flex:0 0 8px}
.empty{color:#4d6284;font-size:13px;padding:14px 4px;grid-column:1/-1}
.hintbar{font-size:12px;color:#5f78a0;line-height:1.6;padding:0 4px}

/* =========================================================
   3. 房间大厅
   ========================================================= */
#scr-lobby{padding:22px;gap:16px;align-items:center;justify-content:center;overflow-y:auto}
#scr-lobby > *{width:100%;max-width:560px}
.code-row{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap}
.code{
  font-size:40px;font-weight:800;letter-spacing:10px;
  background:linear-gradient(90deg,#5ee7a0,#5bc8ff);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  font-variant-numeric:tabular-nums;
}
.copy-tip{font-size:12px;color:#5ee7a0;margin-top:8px}

#lobbyPlayers{list-style:none;display:flex;flex-direction:column;gap:8px;max-height:40vh;overflow-y:auto}
#lobbyPlayers li{
  display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:12px;
  background:rgba(10,16,28,.6);border:1px solid rgba(96,140,210,.12);
}
#lobbyPlayers li .nick{flex:1;font-size:15px}
#lobbyPlayers li .tag{
  font-size:11px;padding:3px 9px;border-radius:20px;
  background:rgba(91,200,255,.16);color:#5bc8ff;border:1px solid rgba(91,200,255,.3);
}
#lobbyPlayers li .tag.me{background:rgba(94,231,160,.16);color:#5ee7a0;border-color:rgba(94,231,160,.3)}

.lobby-actions{display:flex;flex-direction:column;align-items:center;gap:12px}
.lobby-actions .btn{width:100%;max-width:320px}
#waitTip{font-size:13px;color:#7d94b8}

/* =========================================================
   4. 游戏
   ========================================================= */
#scr-game{overflow:hidden;align-items:center;justify-content:center}
#gameWrap{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
#canvas{
  display:block;border-radius:12px;
  box-shadow:0 0 60px rgba(60,120,255,.18),0 0 0 1px rgba(96,140,210,.2) inset;
}

.hud{
  position:absolute;top:0;left:0;right:0;padding:14px 18px;display:flex;
  justify-content:space-between;align-items:flex-start;pointer-events:none;gap:12px;z-index:5;
}
.hud > *{pointer-events:auto}
.hud-left{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.room-tag,.score{
  font-size:13px;padding:7px 14px;border-radius:20px;
  background:rgba(12,20,36,.82);border:1px solid rgba(96,140,210,.22);backdrop-filter:blur(8px);
}
.room-tag b{color:#5ee7a0;letter-spacing:2px}
.score b{color:#ffd93d}

.players-panel{
  position:absolute;right:18px;top:64px;width:186px;
  background:rgba(12,20,36,.82);border:1px solid rgba(96,140,210,.2);
  border-radius:14px;padding:10px;backdrop-filter:blur(8px);
  display:flex;flex-direction:column;gap:6px;max-height:50vh;overflow-y:auto;z-index:5;
}
.pp-row{display:flex;align-items:center;gap:8px;font-size:13px;padding:4px 6px;border-radius:8px}
.pp-row.me{background:rgba(94,231,160,.1)}
.pp-row.dead{opacity:.4}
.pp-dot{width:9px;height:9px;border-radius:50%;flex:0 0 9px}
.pp-nick{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pp-score{color:#ffd93d;font-weight:700;font-variant-numeric:tabular-nums}

.respawn-overlay{
  position:absolute;inset:0;display:none;align-items:center;justify-content:center;
  background:rgba(5,8,16,.62);backdrop-filter:blur(3px);pointer-events:none;z-index:8;
}
.respawn-overlay.show{display:flex}
.respawn-box{text-align:center;animation:pop .3s ease}
@keyframes pop{from{transform:scale(.85);opacity:0}to{transform:scale(1);opacity:1}}
.dead-icon{font-size:60px;margin-bottom:10px}
.respawn-box .msg{font-size:18px;color:#ff7b7b;font-weight:700;letter-spacing:2px}
.countdown{font-size:44px;font-weight:800;color:#5ee7a0;margin-top:6px;font-variant-numeric:tabular-nums}

/* ---------- 提示条 ---------- */
.toast{
  position:fixed;left:50%;bottom:40px;transform:translate(-50%,20px);
  background:rgba(30,42,68,.96);border:1px solid rgba(96,140,210,.3);
  padding:12px 22px;border-radius:12px;font-size:14px;color:#e8eefc;
  opacity:0;transition:.25s;pointer-events:none;z-index:99;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-thumb{background:rgba(96,140,210,.3);border-radius:3px}
::-webkit-scrollbar-track{background:transparent}