body{background:#0f172a;color:#e2e8f0;font-family:Arial,sans-serif} .container,.messages-container,.forum-card{background:#111827;border-radius:16px;box-shadow:0 4px 20px rgba(0,0,0,.25)} a{color:#60a5fa} .button.primary{background:#2563eb;border:none;border-radius:10px;padding:10px 18px;color:#fff}.message-item{padding:12px;margin:10px;border-radius:12px;max-width:80%}.message-item.sent{background:#1d4ed8;margin-left:auto}.message-item.received{background:#1f2937}.message-image{max-width:260px;border-radius:12px;margin-top:8px}.message-input textarea,.message-input input{background:#0f172a;color:#fff;border:1px solid #334155;border-radius:10px;padding:12px;width:100%}.topbar{backdrop-filter:blur(8px)}


.logo a{
background:linear-gradient(90deg,#2563eb,#ef4444);
-webkit-background-clip:text;
-webkit-text-fill-color:transparent;
font-weight:900;
font-size:2rem;
letter-spacing:1px;
}

.forum-header-actions{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;gap:15px;flex-wrap:wrap}
.create-topic-btn{background:linear-gradient(90deg,#2563eb,#ef4444);color:#fff!important;padding:12px 18px;border-radius:12px;font-weight:700;box-shadow:0 6px 20px rgba(37,99,235,.35);transition:.3s}
.create-topic-btn:hover{transform:translateY(-2px);text-decoration:none;background:linear-gradient(90deg,#1d4ed8,#dc2626)}
.category-item{background:#111827;padding:20px;border-radius:18px;border:1px solid #1e293b;transition:.3s}
.category-item:hover{transform:translateY(-4px);box-shadow:0 10px 25px rgba(0,0,0,.35)}
nav{display:flex;justify-content:space-between;align-items:center;padding:0 20px}