:root{color-scheme:light dark;--bg: #ffffff;--bg-alt: #f7f7f9;--fg: #0b0f17;--muted: #5b6577;--border: #e5e7eb;--brand: #2563eb;--brand-fg: #ffffff;--bubble-visitor: #f1f5f9;--bubble-operator: #2563eb;--bubble-operator-fg: #ffffff;--bubble-system: transparent;--danger: #dc2626;--ok: #16a34a;--font: system-ui, -apple-system, "Segoe UI", Roboto, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif}@media (prefers-color-scheme: dark){:root{--bg: #0b0f17;--bg-alt: #111726;--fg: #e5e7eb;--muted: #94a3b8;--border: #1f2937;--brand: #3b82f6;--bubble-visitor: #1e293b;--bubble-operator: #3b82f6}}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;background:var(--bg);color:var(--fg);font-family:var(--font);-webkit-font-smoothing:antialiased}#app{height:100vh;display:flex;flex-direction:column}button{font:inherit;cursor:pointer}.login{display:grid;place-items:center;flex:1;padding:24px}.login-card{width:min(440px,100%);background:var(--bg);border:1px solid var(--border);border-radius:14px;padding:28px;box-shadow:0 1px 2px #0000000a,0 12px 32px #0000000f}.login-card h1{margin:0 0 6px;font-size:20px}.login-card p.muted{margin:0 0 20px;color:var(--muted);font-size:13px}.field{display:block;margin-bottom:14px}.field label{display:block;font-size:12px;font-weight:600;color:var(--muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.04em}.field input{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--fg);font-family:inherit;font-size:14px}.field input:focus{outline:2px solid var(--brand);outline-offset:1px;border-color:var(--brand)}.field-hint{display:block;margin-top:4px;font-size:12px;color:var(--muted)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 16px;border-radius:8px;border:1px solid transparent;font-weight:600;font-size:14px;transition:transform .1s ease}.btn:disabled{opacity:.5;cursor:not-allowed}.btn:hover:not(:disabled){transform:translateY(-1px)}.btn-primary{background:var(--brand);color:var(--brand-fg)}.btn-ghost{background:transparent;color:var(--fg);border-color:var(--border)}.btn-danger{background:transparent;color:var(--danger);border-color:var(--border)}.btn-row{display:flex;gap:8px;justify-content:flex-end}.error{background:color-mix(in srgb,var(--danger) 12%,transparent);border:1px solid color-mix(in srgb,var(--danger) 35%,transparent);color:var(--danger);border-radius:8px;padding:8px 12px;font-size:13px;margin-bottom:12px}.shell{display:grid;grid-template-rows:auto 1fr;height:100vh}.topbar{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;border-bottom:1px solid var(--border);background:var(--bg)}.topbar .brand{font-weight:700}.topbar .meta{font-size:12px;color:var(--muted);display:flex;gap:12px;align-items:center}.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--ok)}.dot.bad{background:var(--danger)}.cols{display:grid;grid-template-columns:360px 1fr;overflow:hidden}@media (max-width: 720px){.cols{grid-template-columns:1fr}.cols.has-selected .inbox{display:none}.cols:not(.has-selected) .thread{display:none}}.inbox{border-right:1px solid var(--border);background:var(--bg-alt);overflow-y:auto;display:flex;flex-direction:column}.inbox-header{padding:12px 16px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border);position:sticky;top:0;background:var(--bg-alt);z-index:1}.inbox-header h2{margin:0;font-size:14px;font-weight:700}.refresh-btn{background:transparent;border:1px solid var(--border);color:var(--muted);border-radius:6px;padding:4px 8px;font-size:12px}.inbox-list{list-style:none;margin:0;padding:0}.inbox-item{padding:12px 16px;border-bottom:1px solid var(--border);cursor:pointer;display:flex;flex-direction:column;gap:4px}.inbox-item:hover{background:color-mix(in srgb,var(--brand) 6%,transparent)}.inbox-item.active{background:color-mix(in srgb,var(--brand) 12%,transparent)}.inbox-item .row1{display:flex;justify-content:space-between;align-items:baseline;gap:8px}.inbox-item .id{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.inbox-item .when{font-size:11px;color:var(--muted);white-space:nowrap}.inbox-item .preview{font-size:13px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.status-chip{display:inline-block;font-size:10px;font-weight:700;padding:2px 6px;border-radius:999px;text-transform:uppercase;letter-spacing:.04em;background:color-mix(in srgb,var(--ok) 18%,transparent);color:var(--ok)}.status-chip.resolved{background:color-mix(in srgb,var(--muted) 18%,transparent);color:var(--muted)}.empty{padding:24px;color:var(--muted);font-size:13px;text-align:center}.thread{display:flex;flex-direction:column;overflow:hidden}.thread-header{padding:12px 16px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;gap:8px}.thread-header h2{margin:0;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;font-weight:700}.thread-header .actions{display:flex;gap:8px}.back-btn{display:none;background:transparent;border:1px solid var(--border);color:var(--muted);border-radius:6px;padding:4px 8px;font-size:12px}@media (max-width: 720px){.back-btn{display:inline-flex}}.messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:8px}.msg{max-width:70%;padding:10px 14px;border-radius:14px;font-size:14px;line-height:1.45;word-wrap:break-word}.msg.visitor{align-self:flex-start;background:var(--bubble-visitor);border-bottom-left-radius:4px}.msg.operator{align-self:flex-end;background:var(--bubble-operator);color:var(--bubble-operator-fg);border-bottom-right-radius:4px}.msg.system{align-self:center;background:var(--bubble-system);color:var(--muted);font-size:12px;border:1px dashed var(--border)}.msg-time{display:block;font-size:10px;margin-top:4px;color:color-mix(in srgb,currentColor 55%,transparent)}.composer{border-top:1px solid var(--border);padding:12px;display:flex;gap:8px;align-items:flex-end}.composer textarea{flex:1;resize:none;min-height:40px;max-height:200px;padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:var(--bg);color:var(--fg);font:inherit;font-size:14px}.composer textarea:focus{outline:2px solid var(--brand);outline-offset:1px;border-color:var(--brand)}.thread-placeholder{display:grid;place-items:center;height:100%;color:var(--muted);font-size:14px;text-align:center;padding:24px}