/* ==========================================================================
   基础层：设计变量、重置、星空背景、顶栏与主栅格
   ========================================================================== */

:root{
  --ink:#edf0e1;--muted:#94aaa2;--faint:#617873;
  --sage:#b8dcc5;--sage2:#d9eedd;--gold:#e6c992;
  --line:rgba(203,225,207,.12);--line2:rgba(203,225,207,.22);
  --serif:"Iowan Old Style","Palatino Linotype","Book Antiqua","Songti SC","STSong",serif;
  --sans:"Avenir Next","Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --h:clamp(680px,calc(100vh - 250px),840px);
}

*{box-sizing:border-box}
[hidden]{display:none!important}
html{background:#061216;color-scheme:dark}
body{
  margin:0;min-width:320px;min-height:100vh;overflow-x:hidden;color:var(--ink);
  font-family:var(--sans);-webkit-font-smoothing:antialiased;
  background:
    radial-gradient(1100px 700px at 12% -15%,rgba(63,112,99,.27),transparent 65%),
    radial-gradient(900px 700px at 105% 20%,rgba(160,131,78,.10),transparent 65%),
    linear-gradient(180deg,#07181c 0%,#051114 55%,#061216 100%);
}
body.modal-open{overflow:hidden}
button{font:inherit;color:inherit;-webkit-tap-highlight-color:transparent}
::selection{background:rgba(184,220,196,.25)}
:focus-visible{outline:2px solid rgba(184,220,196,.7);outline-offset:3px}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:radial-gradient(circle at 50% 45%,transparent 0 30%,rgba(3,10,12,.16) 68%,rgba(2,7,9,.48) 100%);
}
body::after{
  content:"";position:fixed;z-index:0;width:70vw;height:70vw;right:-38vw;top:-42vw;
  border-radius:50%;border:1px solid rgba(184,220,196,.05);pointer-events:none;
  box-shadow:0 0 140px rgba(184,220,196,.035);
}
.stars{
  position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.55;
  background-image:
    radial-gradient(1px 1px at 26px 32px,rgba(250,251,231,.9) 50%,transparent 51%),
    radial-gradient(1px 1px at 142px 88px,rgba(184,220,196,.75) 50%,transparent 51%),
    radial-gradient(1.4px 1.4px at 84px 174px,rgba(255,247,217,.65) 50%,transparent 51%),
    radial-gradient(1px 1px at 221px 44px,rgba(255,255,255,.45) 50%,transparent 51%);
  background-size:280px 250px,390px 330px,520px 450px,610px 510px;
  animation:starDrift 160s linear infinite;
}
.app{position:relative;z-index:2;max-width:1400px;margin:0 auto;padding:0 28px 26px}

/* ---------- 顶栏 ---------- */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:24px 0 20px}
.brand{display:flex;align-items:center;gap:13px;flex:none}
.brand-mark{
  width:42px;height:42px;border-radius:50%;display:grid;place-items:center;flex:none;
  font-family:var(--serif);font-size:27px;color:var(--sage);
  border:1px solid rgba(203,225,207,.16);
  background:radial-gradient(circle at 35% 30%,rgba(184,220,196,.16),rgba(7,20,22,.5));
  box-shadow:inset 0 0 18px rgba(184,220,196,.08),0 0 24px rgba(184,220,196,.05);
}
.brand h1{font-family:var(--serif);font-size:26px;font-weight:500;letter-spacing:.16em;margin:0;white-space:nowrap}
.brand p{font-size:10.5px;letter-spacing:.24em;color:var(--faint);margin:4px 0 0}
.top-mid{display:flex;flex-direction:column;align-items:center;gap:7px;flex:1;min-width:0}
.phase{
  display:flex;align-items:center;gap:7px;padding:6px 11px;border:1px solid var(--line);
  border-radius:999px;background:rgba(255,255,255,.018);font-size:12px;letter-spacing:.08em;
  color:var(--muted);white-space:nowrap;
}
.phase i{width:5px;height:5px;border-radius:50%;background:var(--sage);box-shadow:0 0 8px var(--sage);animation:pulse 3s ease-in-out infinite}
.tagline{
  margin:0;font-family:var(--serif);font-style:italic;font-size:13px;letter-spacing:.08em;
  color:rgba(148,170,162,.55);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%;
}
.top-actions{display:flex;gap:8px;flex:none}
.icon-btn{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--line);
  background:rgba(255,255,255,.022);display:grid;place-items:center;cursor:pointer;
  color:var(--muted);transition:.2s ease;
}
.icon-btn:hover{color:var(--sage2);border-color:var(--line2);background:rgba(184,220,196,.06);transform:translateY(-1px)}
.icon-btn:active{transform:translateY(0)}
.icon-btn.muted{color:var(--faint)}

/* ---------- 主栅格与面板 ---------- */
.game-grid{display:grid;grid-template-columns:minmax(0,1.38fr) minmax(390px,.78fr);gap:18px;align-items:stretch}
.panel{
  position:relative;border:1px solid var(--line);border-radius:24px;
  background:linear-gradient(155deg,rgba(15,37,38,.94),rgba(6,19,22,.95));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.045),0 30px 80px rgba(0,0,0,.27);
}