* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; background: #0b1020; color: #e8ecf1; }
.gm-wrap { min-height: 100%; display: flex; flex-direction: column; }
.gm-header { display: flex; align-items: center; justify-content: center; gap: 12px; padding: 12px 16px; background: linear-gradient(180deg, #121a33, #0f162e); border-bottom: 1px solid rgba(255,255,255,.06); position: sticky; top: 0; z-index: 10; }
.gm-back { position: absolute; left: 12px; color: #9fb3c8; text-decoration: none; }
.gm-title { margin: 0; font-size: 18px; letter-spacing: .5px; }
.gm-main { flex: 1; width: 100%; max-width: 440px; margin: 0 auto; padding: 12px 16px 20px; display: flex; flex-direction: column; gap: 10px; }
.gm-topbar { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.gm-stat { display: flex; align-items: center; gap: 6px; padding: 6px 10px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.08); border-radius: 8px; font-weight: 600; color: #ffd166; }
.gm-stat i { color: #ffd166; }
#gmCanvas { width: 100%; height: auto; background: linear-gradient(180deg, #15335a 40%, #5d3b1e 41%, #7a4b25 100%); border-radius: 12px; border: 1px solid rgba(255,255,255,.08); box-shadow: 0 6px 24px rgba(0,0,0,.35) inset; }
.gm-controls { display: flex; gap: 10px; justify-content: space-between; }
.gm-btn { padding: 10px 14px; border-radius: 10px; border: 1px solid transparent; background: rgba(255,255,255,.08); color: #e8ecf1; cursor: pointer; font-weight: 600; letter-spacing: .5px; }
.gm-btn:hover { filter: brightness(1.1); }
.gm-primary { background: linear-gradient(180deg, #2a74ff, #1b5fe6); border-color: rgba(255,255,255,.12); }
.gm-danger { background: linear-gradient(180deg, #ff5c5c, #e64545); border-color: rgba(255,255,255,.12); }
.gm-lg { width: 100%; padding: 14px; border-radius: 12px; font-size: 16px; }
.gm-panel { display: flex; flex-direction: column; gap: 10px; }
.gm-msg { min-height: 20px; text-align: center; color: #9fb3c8; }
.gm-footer { padding: 14px; text-align: center; color: #8aa0b8; font-size: 12px; border-top: 1px solid rgba(255,255,255,.06); background: #0a0f1e; }

/* Responsive canvas height */
@media (min-width: 390px) { #gmCanvas { height: 620px; } }
@media (min-width: 414px) { #gmCanvas { height: 680px; } }
@media (min-width: 430px) { #gmCanvas { height: 720px; } }