:root{--bg: #f7f7f9;--card: #ffffff;--text: #1a1a1a;--muted: #667085;--border: #e5e7eb;--primary: #2563eb;--primary-contrast: #ffffff;--danger: #dc2626;--success: #16a34a;--warning: #d97706}:root[data-theme=dark]{--bg: #0b0f17;--card: #0f1725;--text: #e5e7eb;--muted: #9aa2b1;--border: #1f2937;--primary: #60a5fa;--primary-contrast: #0b0f17;--danger: #f87171;--success: #34d399;--warning: #fbbf24}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,Arial,"Apple Color Emoji","Segoe UI Emoji"}.app{display:flex;flex-direction:column;min-height:100%}.topbar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:10px 16px;border-bottom:1px solid var(--border);background:var(--card);position:sticky;top:0;z-index:10}.brand{font-weight:700;letter-spacing:.2px}.tabs{display:flex;gap:6px}.tab{background:transparent;color:var(--text);border:1px solid var(--border);padding:6px 10px;border-radius:8px;cursor:pointer}.tab.active{background:var(--primary);color:var(--primary-contrast);border-color:var(--primary)}.spacer{flex:1}.icon-btn{background:transparent;border:1px solid var(--border);color:var(--text);padding:6px 8px;border-radius:8px;cursor:pointer}.icon-btn:hover{border-color:var(--text)}.icon-btn.small{padding:4px 6px;border-radius:8px;font-size:12px}.topbar-banner{display:flex;align-items:center;min-height:0}.topbar .alert{margin:0;padding:6px 8px;font-size:13px}.content{flex:1;padding:16px;max-width:1100px;margin:0 auto;width:100%}.footer{padding:12px 16px;border-top:1px solid var(--border);color:var(--muted);background:var(--card)}.section>h2{margin:6px 0 8px}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:14px;margin:12px 0;box-shadow:0 1px #00000005}.row{display:flex;align-items:center;gap:8px}.row.space-between{justify-content:space-between}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,monospace}.muted{color:var(--muted)}.small{font-size:12px}.right{text-align:right}textarea,.input{width:100%;padding:10px 12px;border-radius:10px;background:transparent;border:1px solid var(--border);color:var(--text)}textarea:focus,.input:focus{outline:none;border-color:var(--primary)}.actions{display:flex;gap:8px;margin-top:10px;align-items:center;flex-wrap:wrap}.btn{border:1px solid var(--border);background:transparent;color:var(--text);padding:8px 12px;border-radius:10px;cursor:pointer}.btn.primary{background:var(--primary);color:var(--primary-contrast);border-color:var(--primary)}.btn.danger{background:var(--danger);color:#fff;border-color:var(--danger)}.btn.small{padding:4px 8px;border-radius:8px}.table{width:100%;border-collapse:collapse;font-size:14px}.table th,.table td{padding:8px 6px;border-bottom:1px solid var(--border);vertical-align:middle}.table th{text-align:left;color:var(--muted);font-weight:600}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}@media (max-width: 900px){.grid-2{grid-template-columns:1fr}}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000059;display:flex;align-items:center;justify-content:center}.modal{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:14px;width:min(560px,92vw)}.modal-title{margin:8px 8px 4px}.modal-body{padding:8px}.modal-actions{display:flex;justify-content:flex-end;gap:8px;padding-top:8px}.alert{display:flex;align-items:center;justify-content:space-between;border:1px solid var(--border);border-radius:12px;padding:10px 12px;background:#00000005;margin:8px 0}.alert.success{border-color:var(--success)}.alert.warning{border-color:var(--warning)}.alert.error{border-color:var(--danger)}.alert.info{border-color:var(--primary)}.toast-container{position:fixed;top:12px;right:12px;display:flex;flex-direction:column;gap:8px;z-index:1000}.toast-container .alert{margin:0;min-width:260px;max-width:520px;box-shadow:0 6px 18px #0000001f;animation:toast-in .18s ease-out both;background:var(--card)}@keyframes toast-in{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.code-list{display:flex;flex-direction:column;gap:8px}.code-row{display:flex;align-items:center;gap:12px}.code-main{flex:1;min-width:0}.code{font-size:26px;font-weight:800;letter-spacing:1px;font-variant-numeric:tabular-nums}.meta{color:var(--muted);display:flex;gap:8px}.timer{display:flex;align-items:center;gap:8px;width:140px}.timer .remaining{font-variant-numeric:tabular-nums;color:var(--muted)}@media (max-width: 600px){.timer{width:110px}}.pie{border-radius:50%;background:conic-gradient(var(--primary) var(--angle, 0deg),var(--border) 0);position:relative}.pie:after{content:"";position:absolute;top:3px;right:3px;bottom:3px;left:3px;border-radius:50%;background:var(--card)}