:root{color-scheme:light;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#182026;background:#f6f7f4;font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.68}.app-shell{min-height:100vh}.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;padding:12px clamp(16px,4vw,48px);border-bottom:1px solid #d8ddd4;background:#f6f7f4f0;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.brand{color:#182026;font-size:18px;font-weight:760;text-decoration:none}.top-actions,.dialog-actions{display:flex;align-items:center;gap:10px}.page{width:min(1040px,calc(100% - 32px));margin:0 auto;padding:42px 0}.button,.icon-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:8px;min-height:40px;transition:background .16s ease,border-color .16s ease,color .16s ease}.button{padding:0 14px;font-weight:700}.button.compact{width:auto;min-width:72px}.button.primary{color:#fff;background:#215f78}.button.primary:hover{background:#174f67}.button.secondary{color:#182026;border-color:#c8d0c4;background:#fff}.button.secondary:hover{border-color:#7e928e;background:#eef2ef}.button.fill{width:100%}.icon-button{width:40px;flex:0 0 40px;color:#28343b;border-color:#c8d0c4;background:#fff}.icon-button:hover{background:#eef2ef}.icon-button.danger{color:#a53d35}.home-layout{display:grid;gap:28px}.home-panel{padding:30px;border:1px solid #d8ddd4;border-radius:8px;background:#fff}h1,h2{margin:0;letter-spacing:0}.home-panel h1,.room-header h1{font-size:clamp(28px,5vw,44px);line-height:1.08}.room-search{display:grid;grid-template-columns:1fr auto;gap:12px;margin-top:24px}input{width:100%;min-height:44px;padding:0 12px;color:#182026;border:1px solid #bfc8bd;border-radius:8px;background:#fff;outline:none}input:focus{border-color:#215f78;box-shadow:0 0 0 3px #215f7829}.input-action{display:grid;grid-template-columns:1fr auto;gap:10px}.check-message{color:#66716b;font-size:13px;font-weight:600}.check-message.available{color:#23744f}.check-message.invalid,.check-message.unavailable{color:#a53d35}.history-panel{display:grid;gap:14px}.section-heading,.room-header,.message-meta{display:flex;align-items:center;justify-content:space-between;gap:16px}.section-heading h2{font-size:20px}.section-heading h3{margin:0;font-size:15px;letter-spacing:0}.section-heading span,.status-line,.field-label,.message-meta time,.empty-state{color:#66716b;font-size:14px}.history-list,.modal-history{display:grid;gap:10px}.compact-list{max-height:220px;overflow:auto;padding-right:2px}.history-item{display:grid;grid-template-columns:1fr auto;align-items:center;gap:10px;padding:10px;border:1px solid #d8ddd4;border-radius:8px;background:#fff}.room-link{min-width:0;overflow-wrap:anywhere;padding:10px 12px;color:#182026;text-align:left;border:0;border-radius:6px;background:transparent}.room-link:hover{background:#edf3f1}.dialog-backdrop{position:fixed;inset:0;z-index:20;display:grid;place-items:center;padding:20px;background:#1820266b}.dialog{position:relative;width:min(460px,100%);padding:24px;border-radius:8px;background:#fff;box-shadow:0 24px 80px #18202640}.dialog h2{padding-right:42px;font-size:22px}.dialog-close{position:absolute;top:16px;right:16px}.form{display:grid;gap:16px;margin-top:20px}label{display:grid;gap:8px;color:#3e494f;font-size:14px;font-weight:650}.captcha-field{gap:8px}.captcha-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(138px,180px);gap:10px;align-items:center}.captcha-row input{min-width:0}.captcha-image{display:grid;place-items:center;width:100%;min-height:52px;padding:0;border:1px solid #d8ddd4;border-radius:8px;background:#f6f7f4;cursor:pointer}.captcha-image:hover{border-color:#7e928e;background:#eef2ef}.captcha-image img{max-width:100%;height:50px}.created-result{display:grid;gap:16px;margin-top:20px}.created-result>div:not(.dialog-actions){display:grid;gap:6px}code,pre{font-family:Cascadia Code,SFMono-Regular,Consolas,monospace}code{overflow-wrap:anywhere;padding:10px;border-radius:6px;background:#eef2ef}.error{margin:0;color:#a53d35;font-size:14px}.room-view{display:grid;gap:18px}.room-title{display:flex;align-items:center;gap:10px;min-width:0}.room-title h1{min-width:0;overflow-wrap:anywhere}.room-title .icon-button{margin-top:4px}.status-line{display:flex;flex-wrap:wrap;gap:10px 20px}.notice{display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:8px}.error-notice{color:#7e2d28;border:1px solid #efc6c2;background:#fff0ee}.message-list{display:grid;gap:12px}.message-item{display:grid;gap:12px;padding:16px;border:1px solid #d8ddd4;border-radius:8px;background:#fff}.message-meta strong{min-width:0;overflow-wrap:anywhere;font-size:16px}.message-item pre{overflow:auto;max-height:320px;margin:0;padding:12px;border-radius:6px;color:#1d2a30;background:#f1f5f2;white-space:pre-wrap;overflow-wrap:anywhere}.empty-state{margin:0;padding:20px;border:1px dashed #c8d0c4;border-radius:8px;text-align:center}.compact-empty{padding:12px}.spin{animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:640px){.topbar{align-items:stretch;flex-direction:column}.top-actions,.room-search,.room-header{grid-template-columns:1fr;align-items:stretch}.top-actions,.room-header{display:grid}.button,.button.compact{width:100%}.input-action{grid-template-columns:1fr}.captcha-row{grid-template-columns:minmax(0,1fr) minmax(112px,132px);gap:8px}.captcha-image img{height:44px}.home-panel{padding:22px}.dialog-actions{display:grid}}