:root{--color-bg: #f6f7fb;--color-surface: #ffffff;--color-primary: #5b3fd6;--color-primary-dark: #3a2e6e;--color-text: #1c1b29;--color-text-muted: #6b6880;--color-border: #e5e1f5;--color-danger: #d0335c;--color-success: #1c9d6f;--radius: 10px}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--color-bg);color:var(--color-text)}.admin-shell{display:flex;min-height:100vh}.sidebar{width:220px;background:var(--color-primary-dark);color:#fff;display:flex;flex-direction:column;padding:20px 0;flex-shrink:0}.sidebar .brand{font-size:18px;font-weight:700;padding:0 20px 20px}.sidebar a{color:#ffffffbf;text-decoration:none;padding:12px 20px;font-size:14px;display:block}.sidebar a.active,.sidebar a:hover{background:#ffffff1a;color:#fff}.main-content{flex:1;padding:28px 32px;overflow-x:auto}.page-title{font-size:22px;font-weight:700;margin:0 0 20px}.card{background:var(--color-surface);border-radius:var(--radius);border:1px solid var(--color-border);padding:18px}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px;margin-bottom:24px}.stat-card{background:var(--color-surface);border-radius:var(--radius);border:1px solid var(--color-border);padding:16px 18px}.stat-card .label{font-size:12px;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.04em}.stat-card .value{font-size:26px;font-weight:700;margin-top:6px}table{width:100%;border-collapse:collapse;font-size:14px}th{text-align:left;padding:10px 12px;color:var(--color-text-muted);font-size:12px;text-transform:uppercase;letter-spacing:.03em;border-bottom:1px solid var(--color-border)}td{padding:10px 12px;border-bottom:1px solid var(--color-border)}tr.clickable{cursor:pointer}tr.clickable:hover{background:#faf9ff}.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:600}.badge.active{background:#e3f8ef;color:var(--color-success)}.badge.blocked{background:#fbe3ea;color:var(--color-danger)}.filters-row{display:flex;gap:10px;margin-bottom:16px;flex-wrap:wrap}.filters-row select,.filters-row input{padding:8px 10px;border:1px solid var(--color-border);border-radius:var(--radius);font-size:13px}button{font-family:inherit;cursor:pointer}.btn{border:1px solid var(--color-border);background:var(--color-surface);border-radius:var(--radius);padding:6px 12px;font-size:13px;margin-right:6px}.btn.primary{background:var(--color-primary);color:#fff;border-color:var(--color-primary)}.btn.danger{background:#fff;color:var(--color-danger);border-color:var(--color-danger)}.login-screen{min-height:100vh;display:flex;align-items:center;justify-content:center}.login-card{background:var(--color-surface);border-radius:14px;border:1px solid var(--color-border);padding:32px;width:320px;display:flex;flex-direction:column;gap:14px}.login-card h1{margin:0 0 4px;font-size:20px}.login-card input{padding:10px 12px;border:1px solid var(--color-border);border-radius:var(--radius);font-size:14px}.error-text{color:var(--color-danger);font-size:13px}.chats-layout{display:grid;grid-template-columns:280px 1fr;gap:20px;height:calc(100vh - 140px)}.conversation-list{overflow-y:auto;border-right:1px solid var(--color-border)}.conversation-row{padding:10px 12px;border-bottom:1px solid var(--color-border);cursor:pointer;font-size:13px}.conversation-row:hover{background:#faf9ff}.thread-view{overflow-y:auto;padding:8px 4px;display:flex;flex-direction:column;gap:8px}.thread-bubble{max-width:60%;padding:8px 12px;border-radius:12px;font-size:13.5px;background:var(--color-surface);border:1px solid var(--color-border)}.thread-bubble.mine{align-self:flex-end;background:var(--color-primary);color:#fff}.thread-bubble .meta{font-size:11px;opacity:.7;margin-top:4px}