body {background:#151a23;color:#f6f6fa;margin:0;}
.topbar {background:#10131a;padding:13px 20px 15px 20px;display:flex;align-items:center;gap:19px;}
.topbar button{background: #233c64;color:#f7f7f7;border:none;padding:7px 18px;border-radius:7px;font-size:15px; cursor:pointer;transition:.18s;}
.topbar button:hover{background:#1568cc;color:#fff;}
.center-area { display:flex; justify-content:center; margin-top:42px; margin-bottom:16px;}
.main-card {background:#192033;border-radius:19px;box-shadow:0 5px 29px #0002;padding:32px 30px;text-align:center;}
.ctitle {font-size:28px;color:#54c1f3;font-weight:700;margin-bottom:17px;}
.c-action-btn {background:#2281e7;color:#fff;padding:10px 32px;margin:8px 6px;font-size:16px;border:none;border-radius:8px;font-weight:600;}
.c-action-btn:hover {background:#166ad8;}
.imgpreview-flex{display:flex;flex-wrap:wrap;gap:17px;justify-content:center;margin:22px auto 35px auto;max-width:1000px;}
.img-preview-block{background:#232b36;border-radius:13px;box-shadow:0 2px 13px #0002;padding:9px 14px 8px 14px;text-align:center;width:204px;}
.img-preview-block img{max-width:170px;max-height:120px;border-radius:9px;margin-bottom:7px;}
.img-preview-block .img-link{font-size:11.5px;color:#2baeef;word-break:break-all;}
.img-preview-block .dl-btn{padding:6px 18px;font-size:13px;border-radius:7px;border:none;background:#009f47;color:#fff;cursor:pointer;}
.img-preview-block .dl-btn:hover{background:#005e17;}
.desc-section{background:#10131a;margin:0 auto 22px auto;padding:45px 6vw 37px 6vw;color:#e7e6ef;max-width:1030px;border-radius:18px;}
.desc-section h2{color:#54c1f3;font-weight:800;margin-top:0;font-size:24px;}
ul{margin-left:18px;}
body.light-mode {background:#f4f7ff;color:#181d20;}
body.light-mode .main-card, body.light-mode .img-preview-block { background:#fff; color:#191c26;}
body.light-mode .ctitle, body.light-mode .desc-section h2 { color: #1588ca;}
body.light-mode .desc-section { background:#eaf5fd; color:#151c26;}
body.light-mode .img-link { color:#2278c5;}
body.light-mode .topbar { background:#dbefff;color:#151d29;}
body.light-mode .main-card { box-shadow:0 4px 29px #b1cee9;}