:root{--color-page-background: #f7fbfe;--color-text-primary: #17364a;--color-text-secondary: #58758a;--color-text-placeholder: #7897ad;--color-border: #acd0ec;--color-focus-ring: rgba(2, 118, 193, .26);--color-card-background: #ffffff;--color-card-shadow: rgba(2, 118, 193, .12);--color-card-row-background: #f0f8fd;--color-card-row-hover-border: #048cbf;--color-field-label: #315a73;--color-field-background: rgba(255, 255, 255, .88);--color-field-border: #acd0ec;--color-field-hover-border: #048cbf;--color-field-focus-border: #0276c1;--color-segment-background: #dceef9;--color-tool-background: #edf7fc;--color-tool-hover-background: #d5ebf8;--color-tool-border: #acd0ec;--color-tool-hover-border: #048cbf;--color-tool-text: #145f8b;--color-primary-button: #0276c1;--color-primary-button-hover: #048cbf;--color-primary-button-text: #ffffff;--color-secondary-button-border: #048cbf;--color-secondary-button-hover: #e5f4fb;--color-text-button: #0276c1;--color-text-button-hover: #048cbf;--color-disabled: rgba(23, 54, 74, .4);--color-account-avatar-background: #acd0ec;--color-account-avatar-text: #17364a;--color-account-tag-background: #e9f5fb;--color-account-tag-border: #acd0ec;--color-remove-hover-background: #fff4d1;--color-notice-background: #e8f5fb;--color-notice-text: #145f8b;--color-notice-accent: #048cbf;--color-error-background: #fff4d1;--color-error-border: #f1b503;--color-error-text: #6a5100;--color-error-accent: #f1b503;--color-error-contrast: #17364a;--color-status-online: #84be4e;--color-status-online-ring: rgba(132, 190, 78, .2);--color-status-online-pulse: rgba(132, 190, 78, .42);--color-status-connecting: #f1b503;--color-status-offline: #0276c1;--color-latency-good: #84be4e;--color-latency-medium: #f1b503;--color-latency-high: #0276c1;--color-room-toolbar-background: #dceef9;--color-room-toolbar-border: #acd0ec;--color-room-toolbar-text: #315a73;--color-room-toolbar-chip-border: rgba(2, 118, 193, .22);--color-host-chip-background: #dff0cf;--color-guest-chip-background: #acd0ec;--color-host-marker: #84be4e;--color-guest-marker: #048cbf;--color-map-background: #edf7fc;--color-map-panel-background: #e5f3fa;--color-map-panel-border: #acd0ec;--color-map-shadow: rgba(2, 118, 193, .14);--color-map-grid: rgba(2, 118, 193, .12);--color-map-axis: rgba(2, 118, 193, .34);--color-map-origin: #0276c1;--color-map-peer-line: rgba(4, 140, 191, .44);--color-map-label: #17364a;--color-map-label-outline: #edf7fc;--color-map-marker-outline: rgba(255, 255, 255, .96);--color-map-control-background: rgba(255, 255, 255, .88);--color-map-control-border: #acd0ec;--color-map-control-shadow: rgba(2, 118, 193, .14);--color-map-control-hover: #acd0ec;--color-map-control-text: #0276c1;--color-direction-background: #ffffff;--color-direction-border: #acd0ec;--color-direction-hover: #acd0ec;--color-direction-center: #048cbf;--color-trail-sky: #acd0ec;--color-trail-blue: #0276c1;--color-trail-cyan: #048cbf;--color-trail-green: #84be4e;--color-trail-yellow: #f1b503;--color-trail-selection: #17364a;--color-trail-cell-outline: rgba(255, 255, 255, .4)}:root{font-family:PingFang SC,Microsoft YaHei,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:var(--color-text-primary);background:var(--color-page-background);font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}html,body{min-width:320px;min-height:100%;margin:0;background:var(--color-page-background)}button,input{font:inherit}button{color:inherit}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid var(--color-focus-ring);outline-offset:3px}.app-shell{min-height:100vh;display:flex;background:var(--color-page-background)}.page-content{width:100%;max-width:1340px;min-height:100vh;display:flex;align-items:center;margin:0 auto;padding:clamp(1.5rem,5vw,4rem) clamp(1rem,4vw,3.5rem)}.auth-layout,.pairing-layout{width:min(100%,430px);margin:auto}.panel{padding:clamp(1.25rem,3vw,2.25rem);background:var(--color-card-background);border:1px solid var(--color-border);border-radius:18px;box-shadow:0 22px 70px var(--color-card-shadow)}.field{display:block;margin-top:1.1rem}.field>span{display:block;margin-bottom:.5rem;color:var(--color-field-label);font-size:.76rem;font-weight:650;letter-spacing:.03em}.field input{width:100%;height:52px;padding:0 1rem;background:var(--color-field-background);border:1px solid var(--color-field-border);border-radius:10px;color:var(--color-text-primary);transition:border-color .16s ease,box-shadow .16s ease}.field input::placeholder{color:var(--color-text-placeholder)}.field input:hover{border-color:var(--color-field-hover-border)}.field input:focus{border-color:var(--color-field-focus-border);box-shadow:0 0 0 3px var(--color-focus-ring);outline:none}.primary-button,.secondary-button{min-height:50px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;cursor:pointer;font-weight:650;transition:background .16s ease,border-color .16s ease,transform .16s ease,opacity .16s ease}.primary-button{width:100%;justify-content:space-between;margin-top:1.4rem;padding:0 1.1rem;background:var(--color-primary-button);border:1px solid var(--color-primary-button);color:var(--color-primary-button-text)}.primary-button:hover:not(:disabled){background:var(--color-primary-button-hover);border-color:var(--color-primary-button-hover);transform:translateY(-1px)}.secondary-button{width:100%;margin-top:1rem;padding:0 1rem;background:transparent;border:1px solid var(--color-secondary-button-border)}.secondary-button:hover:not(:disabled){background:var(--color-secondary-button-hover)}.primary-button:disabled,.secondary-button:disabled{cursor:not-allowed;opacity:.55}.text-button{display:block;margin:1.2rem auto 0;padding:0 0 .15rem;background:transparent;border:0;border-bottom:1px solid currentColor;color:var(--color-text-button);cursor:pointer;font-size:.72rem}.text-button:hover{color:var(--color-text-button-hover)}.form-message{margin:1rem 0 0;padding:.72rem .85rem;background:var(--color-notice-background);border-left:3px solid var(--color-notice-accent);border-radius:9px;color:var(--color-notice-text);font-size:.78rem;line-height:1.5}.form-message-error{background:var(--color-error-background);border-left-color:var(--color-error-accent);color:var(--color-error-text)}.privacy-note{margin:1.2rem 0 0;color:var(--color-text-secondary);font-size:.67rem;line-height:1.5;text-align:center}.saved-account-list{display:grid;gap:.65rem}.saved-account{display:grid;grid-template-columns:minmax(0,1fr) auto;overflow:hidden;background:var(--color-card-row-background);border:1px solid var(--color-border);border-radius:12px;transition:border-color .15s ease,transform .15s ease}.saved-account:hover{border-color:var(--color-card-row-hover-border);transform:translateY(-1px)}.saved-account-main,.saved-account-remove{border:0;background:transparent;cursor:pointer}.saved-account-main{min-width:0;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:.75rem;padding:.7rem .85rem;text-align:left}.saved-account-main strong{overflow:hidden;font-size:.84rem;text-overflow:ellipsis}.saved-account-main>svg{color:var(--color-text-secondary)}.account-avatar{width:36px;height:36px;display:grid;place-items:center;background:var(--color-account-avatar-background);border-radius:50%;color:var(--color-account-avatar-text);font-size:.72rem;font-weight:700}.saved-account-remove{width:42px;display:grid;place-items:center;color:var(--color-text-secondary)}.saved-account-remove:hover{background:var(--color-remove-hover-background);color:var(--color-error-text)}.identity-pill{width:fit-content;display:flex;align-items:center;gap:.6rem;margin:0 0 1rem;padding:.65rem .9rem;background:var(--color-account-tag-background);border:1px solid var(--color-account-tag-border);border-radius:999px;font-size:.8rem;font-weight:650}.online-pip{width:7px;height:7px;background:var(--color-status-online);border-radius:50%;box-shadow:0 0 0 4px var(--color-status-online-ring)}.mode-switch{display:grid;grid-template-columns:1fr 1fr;margin-bottom:1rem;padding:4px;background:var(--color-segment-background);border-radius:10px}.mode-switch button{height:42px;background:transparent;border:0;border-radius:8px;color:var(--color-text-secondary);cursor:pointer;font-size:.82rem;font-weight:650}.mode-switch button.active{background:var(--color-card-background);color:var(--color-text-primary);box-shadow:0 1px 5px var(--color-card-shadow)}.password-tools{display:flex;justify-content:flex-end;gap:.5rem;margin-top:.6rem}.password-tools button{min-height:34px;display:inline-flex;align-items:center;gap:.35rem;padding:0 .75rem;background:var(--color-tool-background);border:1px solid var(--color-tool-border);border-radius:8px;color:var(--color-tool-text);cursor:pointer;font-size:.68rem;font-weight:650}.password-tools button:hover:not(:disabled){background:var(--color-tool-hover-background);border-color:var(--color-tool-hover-border)}.password-tools button:disabled{color:var(--color-disabled);cursor:not-allowed}.session-layout{width:100%;margin:auto}.session-grid{display:block}.board-panel{position:relative;min-width:0;overflow:hidden;background:var(--color-map-panel-background);border:1px solid var(--color-map-panel-border);border-radius:14px;box-shadow:0 22px 60px var(--color-map-shadow)}.board-toolbar{min-height:56px;display:grid;grid-template-columns:auto auto auto minmax(0,1fr) auto;align-items:center;gap:1rem;padding:.65rem 1rem;background:var(--color-room-toolbar-background);border-bottom:1px solid var(--color-room-toolbar-border);color:var(--color-room-toolbar-text);font-size:.68rem}.room-members{min-width:0;display:flex;align-items:center;flex-wrap:wrap;gap:.4rem}.board-toolbar .room-members span{max-width:10rem;overflow:hidden;padding:.32rem .6rem;border:1px solid var(--color-room-toolbar-chip-border);border-radius:999px;color:var(--color-map-control-text);font-weight:700;text-overflow:ellipsis;white-space:nowrap}.room-members .member-host{background:var(--color-host-chip-background)}.room-members .member-guest{background:var(--color-guest-chip-background)}.trail-palette{display:flex;align-items:center;gap:.35rem}.trail-swatch{position:relative;width:27px;height:27px;flex:0 0 27px;display:grid;place-items:center;padding:0;border:2px solid transparent;border-radius:50%;cursor:pointer}.trail-swatch[aria-pressed=true]{border-color:var(--color-trail-selection)}.trail-swatch-check{color:var(--color-trail-selection);stroke-width:3}.trail-swatch-sky,.trail-cell-sky{fill:var(--color-trail-sky);background:var(--color-trail-sky)}.trail-swatch-blue,.trail-cell-blue{fill:var(--color-trail-blue);background:var(--color-trail-blue)}.trail-swatch-cyan,.trail-cell-cyan{fill:var(--color-trail-cyan);background:var(--color-trail-cyan)}.trail-swatch-green,.trail-cell-green{fill:var(--color-trail-green);background:var(--color-trail-green)}.trail-swatch-yellow,.trail-cell-yellow{fill:var(--color-trail-yellow);background:var(--color-trail-yellow)}.precise-mode-button{min-height:32px;display:inline-flex;align-items:center;gap:.35rem;padding:0 .65rem;background:var(--color-field-background);border:1px solid var(--color-room-toolbar-border);border-radius:999px;color:var(--color-room-toolbar-text);cursor:pointer;font-size:.68rem;font-weight:650;white-space:nowrap}.precise-mode-button[aria-pressed=true]{background:var(--color-primary-button);border-color:var(--color-primary-button);color:var(--color-primary-button-text)}.board-toolbar p{min-width:0;overflow:hidden;margin:0;color:var(--color-room-toolbar-text);text-align:center;text-overflow:ellipsis;white-space:nowrap}.session-status{display:flex;align-items:center;gap:.4rem}.connection-badge,.latency-badge{min-height:34px;display:flex;align-items:center;justify-content:center;gap:.5rem;padding:.4rem .7rem;background:var(--color-field-background);border:1px solid var(--color-room-toolbar-border);border-radius:999px;color:var(--color-room-toolbar-text);font-size:.68rem;white-space:nowrap}.latency-badge{min-width:68px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.connection-badge>span{width:7px;height:7px;background:var(--color-text-secondary);border-radius:50%}.connection-badge-ready>span{background:var(--color-status-online);box-shadow:0 0 0 4px var(--color-status-online-ring);animation:status-pulse 2s ease-out infinite}.connection-badge-connecting>span{background:var(--color-status-connecting);animation:status-pulse 1.2s ease-out infinite}.connection-badge-disconnected>span,.connection-badge-error>span{background:var(--color-status-offline)}.latency-good{color:var(--color-latency-good)}.latency-medium{color:var(--color-latency-medium)}.latency-high{color:var(--color-latency-high)}.coordinate-stage{position:relative;width:100%;min-height:520px;height:min(68vh,760px);overflow:hidden;background:var(--color-map-background);-webkit-user-select:none;user-select:none}.coordinate-stage svg{width:100%;height:100%;display:block;cursor:grab;touch-action:none}.coordinate-stage svg:active{cursor:grabbing}.grid-fill{fill:url(#minor-grid)}.trail-cell{stroke:var(--color-trail-cell-outline);stroke-width:.035;opacity:.72}#minor-grid path{stroke:var(--color-map-grid);stroke-width:.025}.axis-line{stroke:var(--color-map-axis);stroke-width:.04;stroke-dasharray:.18 .18}.origin-dot{fill:var(--color-map-origin);opacity:.65}.peer-line{stroke:var(--color-map-peer-line);stroke-width:.06;stroke-dasharray:.22 .18}.player-marker circle{stroke:var(--color-map-marker-outline);stroke-width:.07;vector-effect:non-scaling-stroke}.player-marker text{fill:var(--color-map-label);stroke:var(--color-map-label-outline);stroke-width:.09;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.04em;paint-order:stroke}.player-marker-host circle{fill:var(--color-host-marker)}.player-marker-guest circle{fill:var(--color-guest-marker)}.zoom-controls{position:absolute;z-index:3;top:.85rem;right:.85rem;display:grid;grid-template-columns:repeat(2,38px);gap:4px;padding:4px;background:var(--color-map-control-background);border:1px solid var(--color-map-control-border);border-radius:10px;box-shadow:0 8px 24px var(--color-map-control-shadow);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.zoom-controls button{height:36px;display:grid;place-items:center;background:transparent;border:0;border-radius:7px;color:var(--color-map-control-text);cursor:pointer;font-size:1.15rem;font-weight:700}.zoom-controls button:hover{background:var(--color-map-control-hover)}.direction-pad{width:136px;height:120px;display:grid;grid-template-columns:repeat(3,36px);grid-template-rows:repeat(3,32px);gap:4px;justify-content:center;padding:8px}.map-direction-pad{position:absolute;z-index:3;right:1rem;bottom:1rem;margin:0;background:var(--color-map-control-background);border:1px solid var(--color-map-control-border);border-radius:12px;box-shadow:0 8px 24px var(--color-map-control-shadow);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.direction-pad button{display:grid;place-items:center;background:var(--color-direction-background);border:1px solid var(--color-direction-border);border-bottom-width:2px;border-radius:7px;cursor:pointer;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9rem}.direction-pad button:hover:not(:disabled){background:var(--color-direction-hover)}.direction-pad button:active:not(:disabled){transform:translateY(1px)}.direction-pad button:disabled{color:var(--color-disabled);cursor:not-allowed}.direction-up{grid-column:2;grid-row:1}.direction-left{grid-column:1;grid-row:2}.direction-center{width:10px;height:10px;grid-column:2;grid-row:2;place-self:center;background:var(--color-direction-center);border-radius:50%}.direction-right{grid-column:3;grid-row:2}.direction-down{grid-column:2;grid-row:3}.session-error{display:flex;align-items:flex-start;gap:.5rem;margin:.8rem 0 0;padding:.75rem;background:var(--color-error-background);border:1px solid var(--color-error-border);border-radius:9px;color:var(--color-error-text);font-size:.72rem;line-height:1.5}.session-error-icon{flex:0 0 18px;color:var(--color-error-accent)}.session-actions{display:flex;align-items:center;justify-content:flex-end;gap:.8rem;margin-top:.8rem}.session-actions .secondary-button{width:auto;min-height:38px;gap:.4rem;margin:0}.session-actions .text-button{display:inline-flex;align-items:center;gap:.35rem;margin:0}@keyframes status-pulse{0%{box-shadow:0 0 0 0 var(--color-status-online-pulse)}70%{box-shadow:0 0 0 7px transparent}to{box-shadow:0 0 0 0 transparent}}@media(max-width:700px){.page-content{align-items:flex-start;padding:1rem}.panel{border-radius:14px}.board-toolbar{display:flex;align-items:flex-start;flex-direction:column;gap:.5rem}.board-toolbar p{width:100%;text-align:left}.trail-palette{width:100%;overflow-x:auto;padding-block:.1rem;scrollbar-width:none}.trail-palette::-webkit-scrollbar{display:none}.session-status{width:100%;justify-content:flex-start}.coordinate-stage{min-height:420px;height:64vh}.zoom-controls{top:.65rem;right:.65rem}.map-direction-pad{right:.65rem;bottom:.65rem}}@media(max-width:420px){.session-status{flex-wrap:wrap}.coordinate-stage{min-height:380px;height:60vh}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}