:root{--bg:#1f2937;--bg-sidebar:#111827;--bg-elevated:#273449;--text:#e5e7eb;--text-muted:#9ca3af;--accent:#38bdf8;--border:#374151;--own-message-bg:#1e3a5f;--danger:#f87171}*{box-sizing:border-box}html,body,#app{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}button{font:inherit;cursor:pointer}.boot-screen{height:100%;color:var(--text-muted);justify-content:center;align-items:center;display:flex}.login-screen{justify-content:center;align-items:center;height:100%;padding:16px;display:flex}.login-card{background:var(--bg-elevated);border-radius:12px;flex-direction:column;gap:16px;width:100%;max-width:360px;padding:32px;display:flex}.login-card h1{text-align:center;color:var(--accent);margin:0 0 8px}.login-card label{color:var(--text-muted);flex-direction:column;gap:6px;font-size:.9rem;display:flex}.login-card input{border:1px solid var(--border);background:var(--bg);color:var(--text);border-radius:8px;padding:10px 12px;font-size:1rem}.login-card button{background:var(--accent);color:#0b1522;border:none;border-radius:8px;padding:10px;font-weight:600}.login-card button:disabled{opacity:.6;cursor:default}.form-error{color:var(--danger);margin:0;font-size:.85rem}.chat-layout{height:100%;display:flex}.sidebar{background:var(--bg-sidebar);flex-shrink:0;width:240px;padding:16px 8px;overflow-y:auto}.sidebar-title{color:var(--accent);margin:0;padding:0 8px 16px;font-size:1.1rem}.sidebar-category{margin-bottom:12px}.category-title{text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin:8px 0 4px;padding:0 8px;font-size:.75rem}.sidebar ul{margin:0;padding:0;list-style:none}.channel-link{text-align:left;width:100%;color:var(--text-muted);background:0 0;border:none;border-radius:6px;padding:6px 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12px}.logout-button:hover{color:var(--text);border-color:var(--text-muted)}.no-channel{color:var(--text-muted);margin:auto}.message-list{flex-direction:column;flex:1;gap:10px;padding:16px 20px;display:flex;overflow-y:auto}.message-list-empty{color:var(--text-muted);margin:auto}.message{background:var(--bg-elevated);border-radius:10px;max-width:70%;padding:8px 12px}.message--own{background:var(--own-message-bg);align-self:flex-end}.message-meta{color:var(--text-muted);align-items:baseline;gap:8px;margin-bottom:2px;font-size:.8rem;display:flex}.message-author{color:var(--text);font-weight:600}.message-edited{font-style:italic}.message-content{white-space:pre-wrap;word-break:break-word;margin:0}.message-reply-preview{color:var(--text-muted);border-left:2px solid var(--accent);margin-bottom:4px;padding-left:8px;font-size:.8rem}.message-pinned{margin-left:2px}.message-attachments{flex-wrap:wrap;gap:8px;margin-top:6px;display:flex}.attachment-image{border-radius:8px;max-width:220px;max-height:220px;display:block}.attachment-file{background:var(--bg);color:var(--text);border-radius:6px;align-items:center;gap:4px;padding:6px 10px;font-size:.85rem;text-decoration:none;display:inline-flex}.attachment-size{color:var(--text-muted)}.message-reactions{flex-wrap:wrap;align-items:center;gap:4px;margin-top:6px;display:flex;position:relative}.reaction-pill{background:var(--bg);border:1px solid var(--border);color:var(--text);border-radius:999px;padding:1px 8px;font-size:.8rem}.reaction-pill--me{border-color:var(--accent);background:#38bdf826}.reaction-add{border:1px dashed var(--border);width:22px;height:22px;color:var(--text-muted);background:0 0;border-radius:999px;line-height:1}.emoji-picker{background:var(--bg-elevated);border:1px solid 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button.active{color:var(--accent);border-bottom-color:var(--accent)}.admin-content{padding:20px;overflow-y:auto}.admin-tab-header{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.admin-tab h3{margin-top:0}.role-form,.new-overwrite{background:var(--bg-elevated);border-radius:10px;flex-direction:column;gap:12px;margin-bottom:16px;padding:16px;display:flex}.role-form label,.channel-picker{color:var(--text-muted);flex-direction:column;gap:4px;font-size:.85rem;display:flex}.role-form input[type=text],.role-form input:not([type=checkbox]):not([type=color]){background:var(--bg);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:6px 10px}.channel-picker select{background:var(--bg-elevated);border:1px solid var(--border);color:var(--text);border-radius:6px;margin-bottom:16px;padding:6px 10px}.permission-groups{flex-direction:column;gap:10px;display:flex}.permission-group h4,.permission-group 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