/* 场景皮肤：深色三款（火星临边 / 极光轨道 / 日冕）与浅色三款（蓝色星球 / 火星白昼 / 日光）。.scene-bg 由 skin.js 插入 .app-body 底层。由 gen_scenes.py 生成。 */
.scene-bg{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden;display:none}
html[data-skin=mars] .scene-bg,html[data-skin=aurora] .scene-bg,html[data-skin=corona] .scene-bg{display:block}
.scene-bg>div{display:none;position:absolute;inset:0}
html[data-skin=mars] .sb-mars,html[data-skin=aurora] .sb-aurora,html[data-skin=corona] .sb-corona{display:block}
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.scene-bg .s2{position:absolute;left:0;top:0;width:2px;height:2px;border-radius:50%;box-shadow:2245px 155px 0 0px rgba(255,235,210,0.94),1182px 177px 0 1px rgba(200,220,255,0.76),76px 66px 0 0px rgba(200,220,255,0.86),1431px 175px 0 0px rgba(200,220,255,0.97),2221px 859px 0 1px rgba(255,255,255,0.78),698px 449px 0 0px rgba(200,220,255,0.87),2304px 1072px 0 0px rgba(255,235,210,0.87),1222px 569px 0 1px rgba(255,255,255,0.93),1935px 1056px 0 0px rgba(200,220,255,0.90),2404px 1449px 0 1px rgba(200,220,255,0.76),2531px 203px 0 1px rgba(200,220,255,0.94),1081px 307px 0 1px rgba(200,220,255,0.92),2261px 814px 0 0px rgba(200,220,255,0.85),1744px 955px 0 0px rgba(255,235,210,0.86),1314px 1431px 0 1px rgba(255,235,210,0.89),840px 1375px 0 0px rgba(255,255,255,0.99),89px 816px 0 0px rgba(255,235,210,0.65),617px 594px 0 0px rgba(255,255,255,0.89),1260px 246px 0 0px rgba(255,235,210,0.81),239px 78px 0 1px rgba(255,255,255,0.66),1839px 756px 0 0px rgba(255,255,255,0.61),789px 526px 0 0px rgba(255,255,255,0.65),461px 338px 0 0px rgba(255,235,210,0.91),914px 413px 0 0px rgba(255,235,210,0.95),2180px 498px 0 0px rgba(255,255,255,0.95),4px 1272px 0 0px rgba(255,235,210,0.83),1289px 473px 0 1px rgba(200,220,255,0.91),227px 659px 0 0px rgba(200,220,255,0.83),668px 590px 0 0px rgba(255,235,210,0.65),215px 774px 0 0px rgba(200,220,255,0.91),110px 1347px 0 0px rgba(200,220,255,0.65),697px 705px 0 1px rgba(200,220,255,0.76),2103px 176px 0 0px rgba(255,255,255,0.98),182px 907px 0 0px rgba(255,235,210,0.69),1825px 355px 0 1px rgba(255,235,210,0.86),684px 360px 0 0px rgba(255,235,210,0.78),2583px 1123px 0 1px rgba(200,220,255,0.88),222px 217px 0 0px rgba(255,255,255,0.73),479px 390px 0 1px rgba(255,235,210,0.67),826px 219px 0 0px rgba(200,220,255,0.97),36px 306px 0 0px rgba(255,255,255,0.93),937px 886px 0 0px rgba(255,235,210,0.70),2218px 688px 0 0px rgba(200,220,255,0.78),858px 1349px 0 0px rgba(255,235,210,0.66),2400px 1152px 0 0px rgba(255,235,210,0.70),423px 455px 0 0px rgba(255,255,255,0.62),1503px 1348px 0 0px rgba(255,235,210,0.63),2594px 217px 0 1px rgba(255,235,210,0.74),1727px 748px 0 0px rgba(255,235,210,0.87),1181px 253px 0 1px rgba(255,235,210,0.81),540px 1080px 0 1px rgba(255,255,255,0.80),1808px 478px 0 0px rgba(255,255,255,0.91),857px 434px 0 0px rgba(200,220,255,0.75),2103px 1262px 0 0px rgba(255,255,255,0.94),1002px 929px 0 1px rgba(200,220,255,0.73),1214px 1087px 0 1px rgba(255,255,255,0.70),950px 469px 0 1px rgba(255,255,255,0.70),2569px 420px 0 0px rgba(255,235,210,0.72),173px 1382px 0 0px rgba(200,220,255,0.91),43px 555px 0 1px rgba(255,235,210,0.88),1388px 812px 0 1px rgba(255,235,210,0.72),1018px 185px 0 1px rgba(255,255,255,0.64),2551px 612px 0 0px rgba(255,255,255,0.75),1297px 310px 0 1px rgba(200,220,255,0.66),1503px 316px 0 0px rgba(255,255,255,0.80),667px 843px 0 0px rgba(255,255,255,1.00),1627px 1445px 0 0px rgba(255,255,255,0.91),2494px 1230px 0 1px rgba(255,235,210,0.73),422px 1487px 0 0px rgba(255,235,210,0.71),67px 1324px 0 1px rgba(255,255,255,0.74);filter:drop-shadow(0 0 3px rgba(200,220,255,.9))}
html[data-skin=mars] #appShell .app-body,html[data-skin=aurora] #appShell .app-body,html[data-skin=corona] #appShell .app-body{background:#02030a!important}

/* 火星临边 */
.sb-mars{background:radial-gradient(1200px 700px at 85% -10%,#0b1430 0,transparent 60%),#02030a}
.sb-mars .planet{position:absolute;width:2600px;height:2600px;right:-1650px;bottom:-2170px;border-radius:50%;overflow:hidden;
 background:radial-gradient(circle at 34% 6%,#f08a55 0,#c4511f 7%,#7d2a0e 16%,#3a1205 28%,#120502 40%,#000 55%);
 box-shadow:0 0 0 2px rgba(150,190,255,.55),0 0 24px 6px rgba(120,170,255,.45),0 0 90px 30px rgba(90,140,255,.18),0 -10px 140px 40px rgba(255,120,60,.10)}
.sb-mars .surface{position:absolute;inset:0;border-radius:50%;mix-blend-mode:multiply;opacity:.55;background-image:url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%221440%22%20height%3D%22900%22%3E%3Cfilter%20id%3D%22f%22%3E%3CfeTurbulence%20type%3D%22fractalNoise%22%20baseFrequency%3D%22.006%22%20numOctaves%3D%226%22%20seed%3D%223%22/%3E%3CfeColorMatrix%20values%3D%220%200%200%200%200%200%200%200%200%200%200%200%200%200%200%201.4%200%200%200%20-.45%22/%3E%3C/filter%3E%3Crect%20width%3D%22100%25%22%20height%3D%22100%25%22%20filter%3D%22url%28%23f%29%22%20opacity%3D%221%22/%3E%3C/svg%3E");background-size:900px 560px}
.sb-mars .haze{position:absolute;inset:0;background:radial-gradient(900px 320px at 78% 92%,rgba(255,110,60,.20),transparent 70%)}

/* 极光轨道 */
.sb-aurora{background:radial-gradient(1000px 600px at 50% 120%,#06142a 0,transparent 70%),#020409}
.sb-aurora .earth{position:absolute;width:3200px;height:3200px;left:50%;margin-left:-1600px;top:calc(100% - 210px);border-radius:50%;
 background:radial-gradient(circle at 50% 0%,#0a1a33 0,#050c18 6%,#02050b 20%);
 box-shadow:0 0 0 1.5px rgba(110,180,255,.75),0 0 18px 4px rgba(80,150,255,.55),0 0 70px 20px rgba(60,120,255,.18)}
.sb-aurora .aurora{position:absolute;left:-10%;right:-10%;bottom:190px;height:360px;
 background:repeating-linear-gradient(90deg,rgba(80,255,170,0) 0 6px,rgba(80,255,170,.22) 7px 9px,rgba(80,255,170,.05) 10px 16px),linear-gradient(180deg,transparent,rgba(160,90,255,.35) 30%,rgba(70,255,170,.55) 70%,rgba(70,255,170,0));
 -webkit-mask:radial-gradient(60% 55% at 50% 70%,#000 30%,transparent 70%);mask:radial-gradient(60% 55% at 50% 70%,#000 30%,transparent 70%);
 transform:skewX(-18deg) rotate(-6deg);filter:blur(2px);mix-blend-mode:screen;animation:sb-sway 90s ease-in-out infinite alternate}
.sb-aurora .a2{bottom:240px;left:20%;opacity:.55;transform:skewX(14deg) rotate(4deg) scaleX(.8);animation-duration:130s}
@keyframes sb-sway{to{translate:6% 0;opacity:.8}}

/* 日冕 */
.sb-corona{background:#010103}
.sb-corona .corona{position:absolute;width:1100px;height:1100px;right:-220px;top:-330px;border-radius:50%;
 background:radial-gradient(circle,rgba(255,230,180,0) 30%,rgba(255,220,160,.55) 31.5%,rgba(255,190,110,.28) 35%,rgba(255,150,70,.12) 42%,rgba(255,120,60,.05) 52%,transparent 66%);filter:blur(1px)}
.sb-corona .disk{position:absolute;width:340px;height:340px;right:160px;top:50px;border-radius:50%;background:radial-gradient(circle at 40% 40%,#07070a,#000 70%);
 box-shadow:0 0 0 1.5px rgba(255,244,220,.95),0 0 18px 4px rgba(255,230,180,.85),0 0 60px 18px rgba(255,190,110,.45),0 0 160px 60px rgba(255,150,70,.18)}
.sb-corona .diamond{position:absolute;width:10px;height:10px;border-radius:50%;right:449px;top:94px;background:#fff;box-shadow:0 0 12px 6px #fff,0 0 40px 18px rgba(255,236,200,.85),0 0 120px 50px rgba(255,200,120,.35)}
.sb-corona .streak{position:absolute;right:120px;top:100px;width:820px;height:2px;background:linear-gradient(90deg,transparent,rgba(255,240,215,.6),transparent);transform:rotate(-8deg);filter:blur(1px)}
@media (prefers-reduced-motion:reduce){.sb-aurora .aurora{animation:none}}

/* 场景皮肤的强调色 */
html[data-skin=mars]{--skin-acc:#ff8a5c;--me:linear-gradient(135deg,#ff7d4d,#d8431b);--me-glow:rgba(255,90,36,.35)}
html[data-skin=aurora]{--skin-acc:#5ef0b4;--me:linear-gradient(135deg,#2fe39a,#1a9e8a);--me-glow:rgba(47,216,140,.30)}
html[data-skin=corona]{--skin-acc:#ffd27a;--me:linear-gradient(135deg,#ffbf5e,#e07a20);--me-glow:rgba(255,170,70,.35)}
html[data-skin=mars] #appShell .sidebar .rail-button[aria-current=true],html[data-skin=aurora] #appShell .sidebar .rail-button[aria-current=true],html[data-skin=corona] #appShell .sidebar .rail-button[aria-current=true]{color:var(--skin-acc)!important;filter:drop-shadow(0 0 6px var(--skin-acc))}
html[data-skin=mars] #appShell .greeting strong,html[data-skin=aurora] #appShell .greeting strong,html[data-skin=corona] #appShell .greeting strong{color:var(--skin-acc)!important}

/* ---------- 浅色场景皮肤：只用渐变 + 蒙版，不用纹理 ---------- */
html[data-skin=earth] .scene-bg,html[data-skin=dune] .scene-bg,html[data-skin=sun] .scene-bg{display:block}
html[data-skin=earth] .sb-earth,html[data-skin=dune] .sb-dune,html[data-skin=sun] .sb-sun{display:block}
html[data-skin=earth] .scene-bg>i,html[data-skin=dune] .scene-bg>i,html[data-skin=sun] .scene-bg>i{display:none}
.sb-earth,.sb-dune{-webkit-mask:radial-gradient(ellipse 72% 82% at 100% 100%,#000 30%,transparent 74%);mask:radial-gradient(ellipse 72% 82% at 100% 100%,#000 30%,transparent 74%)}
.sb-limb{position:absolute;inset:0;background:
 radial-gradient(circle 760px at calc(100% + 330px) calc(100% + 520px),var(--lf) 0 760px,transparent 761px),
 radial-gradient(circle 762px at calc(100% + 330px) calc(100% + 520px),transparent 0 758px,var(--ll) 760px,var(--lg) 764px,transparent 784px),
 radial-gradient(900px 520px at 100% 100%,var(--lh),transparent 70%)}
.sb-earth{--lf:rgba(150,190,255,.30);--ll:rgba(90,150,255,.70);--lg:rgba(140,190,255,.22);--lh:rgba(150,190,255,.26)}
.sb-dune{--lf:rgba(235,160,120,.30);--ll:rgba(230,120,70,.65);--lg:rgba(255,170,120,.22);--lh:rgba(250,180,140,.26)}
.sb-sun .glare{position:absolute;inset:0;background:radial-gradient(180px 150px at calc(100% - 120px) -30px,#fff 0,rgba(255,250,236,.95) 40%,transparent 100%),radial-gradient(760px 560px at calc(100% - 120px) -60px,rgba(255,206,130,.62) 0,rgba(255,196,120,.34) 30%,rgba(255,190,130,.12) 55%,transparent 75%)}
.sb-sun .rays{position:absolute;inset:0;background:repeating-conic-gradient(from 200deg at calc(100% - 120px) -60px,rgba(255,190,110,.13) 0 1.4deg,transparent 1.4deg 9deg);
 -webkit-mask:radial-gradient(1100px 900px at calc(100% - 120px) -60px,#000 0,transparent 75%);mask:radial-gradient(1100px 900px at calc(100% - 120px) -60px,#000 0,transparent 75%);animation:sb-rays 240s linear infinite alternate}
@keyframes sb-rays{to{opacity:.45}}
html[data-skin=earth] #appShell .app-body{background:linear-gradient(160deg,#f7f9fd 0%,#eef4fc 55%,#e5eefb 100%)!important}
html[data-skin=dune] #appShell .app-body{background:linear-gradient(160deg,#fbf8f5 0%,#f8efe8 55%,#f4e6dc 100%)!important}
html[data-skin=sun] #appShell .app-body{background:linear-gradient(200deg,#f6f3ee 0%,#f1f2f5 45%,#e9edf5 100%)!important}
html[data-skin=dune]{--skin-acc:#c8501f;--me:linear-gradient(135deg,#ef6a34,#c8461a);--me-glow:rgba(217,83,30,.28)}
html[data-skin=sun]{--skin-acc:#d46a06;--me:linear-gradient(135deg,#ff9a2e,#e06a08);--me-glow:rgba(240,122,16,.28)}
html[data-skin=dune] #appShell .sidebar .rail-button[aria-current=true],html[data-skin=sun] #appShell .sidebar .rail-button[aria-current=true]{color:var(--skin-acc)!important}
html[data-skin=dune] #appShell .greeting strong,html[data-skin=sun] #appShell .greeting strong{color:var(--skin-acc)!important}
@media (prefers-reduced-motion:reduce){.sb-sun .rays{animation:none}}

/* 场景底图是绝对定位的，会盖住 .app-body 里静态定位的页面（如「创建活动」打开的策略页），统一抬到底图之上 */
html #appShell .app-body>:not(.scene-bg):not(.sidebar){position:relative;z-index:1}