:root{--bg: #f5f5f7;--surface: #ffffff;--border: #e5e7eb;--text: #111827;--text-muted: #6b7280;--accent: #4f46e5;--accent-hover: #4338ca;--danger: #ef4444;--radius: 12px;--shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}.login-wrapper{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:1rem}.login-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:2.5rem 2rem;width:100%;max-width:400px}.login-logo{text-align:center;margin-bottom:2rem}.logo-circle{width:56px;height:56px;border-radius:50%;background:var(--accent);color:#fff;font-size:1.5rem;font-weight:700;display:inline-flex;align-items:center;justify-content:center;margin-bottom:.75rem}.login-logo h1{font-size:1.4rem;font-weight:700}.login-logo p{color:var(--text-muted);font-size:.9rem;margin-top:.25rem}.login-form{display:flex;flex-direction:column;gap:1.25rem}.field{display:flex;flex-direction:column;gap:.4rem}.field label{font-size:.875rem;font-weight:500}input[type=email],input[type=password],input[type=text],textarea,select{width:100%;padding:.65rem .85rem;border:1px solid var(--border);border-radius:8px;font-size:.95rem;background:var(--surface);transition:border-color .15s}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px #4f46e51f}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.65rem 1.25rem;border-radius:8px;font-size:.9rem;font-weight:500;cursor:pointer;border:none;transition:background .15s,opacity .15s}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--accent);color:#fff;width:100%}.btn-primary:hover:not(:disabled){background:var(--accent-hover)}.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text)}.btn-outline:hover:not(:disabled){background:var(--bg)}.btn-ghost{background:transparent;color:var(--text-muted);padding:.5rem .75rem}.btn-ghost:hover{color:var(--text)}.alert{padding:.75rem 1rem;border-radius:8px;font-size:.875rem}.alert-error{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}.topbar{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.topbar-inner{max-width:760px;margin:0 auto;padding:.9rem 1.5rem;display:flex;align-items:center;justify-content:space-between}.topbar-brand{font-weight:700;font-size:1.1rem;color:var(--accent)}.topbar-user{display:flex;align-items:center;gap:.75rem;font-size:.875rem;color:var(--text-muted)}.feed-main{max-width:760px;margin:0 auto;padding:2rem 1.5rem}.feed-header{display:flex;align-items:center;gap:.75rem;margin-bottom:1.5rem}.feed-header h2{font-size:1.3rem;font-weight:700}.badge{background:var(--bg);border:1px solid var(--border);color:var(--text-muted);border-radius:99px;padding:.2rem .7rem;font-size:.8rem}.messages-list{display:flex;flex-direction:column;gap:1rem}.message-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow)}.message-meta{display:flex;align-items:center;justify-content:space-between;margin-bottom:.6rem}.message-author{font-size:.8rem;font-weight:600;color:var(--accent)}.message-date{font-size:.8rem;color:var(--text-muted)}.message-title{font-size:1.05rem;font-weight:700;margin-bottom:.75rem}.message-body p{font-size:.93rem;color:var(--text-muted);line-height:1.7}.message-body p+p{margin-top:.5rem}.pagination{display:flex;align-items:center;justify-content:center;gap:1rem;margin-top:2rem;font-size:.875rem;color:var(--text-muted)}.spinner-wrap{display:flex;justify-content:center;padding:3rem}.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{text-align:center;padding:3rem;color:var(--text-muted)}