:root{--primary:#1290ff;--hover:#f26522;--text:#e0e0e0;--bg:#000;--card-bg:#111;--card-border:#1a1a1a;--font:Arial, Helvetica, sans-serif}*,::before,::after{margin:0;padding:0;box-sizing:border-box}body{background:var(--bg);color:var(--text);font-family:var(--font);min-height:100vh;display:flex;align-items:center;justify-content:center}main{max-width:600px;width:100%;padding:32px 20px;display:flex;flex-direction:column;align-items:center;gap:28px;text-align:center}.logo{max-width:320px;width:80%;height:auto}.alert-box{background:var(--card-bg);border:1px solid #0b3357;border-radius:10px;padding:20px 24px;max-width:480px;width:100%}.alert-icon{font-size:2em;color:var(--primary);display:block;margin-bottom:8px}.alert-box h1{font-size:1.3em;color:#fff;font-weight:600;margin-bottom:8px}.alert-box p{font-size:.92em;line-height:1.5;color:var(--text)}.alert-box strong{color:#fff}.alert-box em{color:var(--primary);font-style:normal}.platforms{width:100%;max-width:480px}.platforms h2{font-size:1em;color:var(--primary);font-weight:500;margin-bottom:14px}.platform-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.platform-card{display:flex;flex-direction:column;align-items:center;gap:6px;padding:16px 8px;background:var(--card-bg);border:1px solid var(--card-border);border-radius:8px;text-decoration:none;color:var(--text);transition:border-color .2s,box-shadow .2s}.platform-card:hover,.platform-card:focus-visible{border-color:var(--primary);box-shadow:0 0 12px 2px rgba(18,144,255,.4);outline:0}.card-icon{font-size:1.6em}.platform-card strong{font-size:.85em;color:#fff}.card-desc{font-size:.7em;color:#888}.back-button{background:radial-gradient(circle at 30% 30%,#1a1a1a,#000);border-radius:50%;border:1px solid var(--primary);box-shadow:0 0 12px 2px rgba(18,144,255,.6);width:52px;height:52px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:transform .15s,box-shadow .15s,border-color .15s;padding:0}.back-button:hover{transform:translateY(-2px) scale(1.04);box-shadow:0 0 18px 4px rgba(242,101,34,.8);border-color:var(--hover)}.back-button:active{transform:scale(.96);box-shadow:0 0 8px 1px rgba(18,144,255,.5)}.back-icon{display:flex}footer{margin-top:4px}footer p{font-size:.7em;color:#7a7a7a}@media (max-width:480px){main{padding:24px 16px;gap:22px}.platform-grid{grid-template-columns:1fr;gap:8px}.platform-card{flex-direction:row;padding:12px 16px;gap:10px}.card-desc{display:none}.logo{max-width:260px}}