:root{color-scheme:light;--color-page-background: #ffffff;--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-gomoku-background: #fefcf8;--color-gomoku-panel-background: #ffffff;--color-gomoku-border: #bfc5cb;--color-gomoku-grid: #44444a;--color-gomoku-shadow: rgba(23, 54, 74, .1);--color-gomoku-banner-background: #ffffff;--color-gomoku-piece-outline: rgba(17, 24, 39, .38);--color-gomoku-selection: #0276c1;--color-gomoku-latest: #f1b503;--color-gomoku-winning: #84be4e;--color-gomoku-turn-border: #65a832;--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[data-theme=dark]{color-scheme:dark;--color-page-background: #080808;--color-text-primary: #ffffff;--color-text-secondary: #c7c7c7;--color-text-placeholder: #8d8d8d;--color-border: #353535;--color-focus-ring: rgba(255, 255, 255, .28);--color-card-background: #111111;--color-card-shadow: rgba(0, 0, 0, .5);--color-card-row-background: #191919;--color-card-row-hover-border: #ffffff;--color-field-label: #eeeeee;--color-field-background: rgba(22, 22, 22, .96);--color-field-border: #3d3d3d;--color-field-hover-border: #777777;--color-field-focus-border: #ffffff;--color-segment-background: #1b1b1b;--color-tool-background: #181818;--color-tool-hover-background: #282828;--color-tool-border: #3d3d3d;--color-tool-hover-border: #8a8a8a;--color-tool-text: #f5f5f5;--color-primary-button: #f4f4f4;--color-primary-button-hover: #ffffff;--color-primary-button-text: #101010;--color-secondary-button-border: #e6e6e6;--color-secondary-button-hover: #222222;--color-text-button: #ffffff;--color-text-button-hover: #d4d4d4;--color-disabled: rgba(255, 255, 255, .4);--color-account-avatar-background: #303030;--color-account-avatar-text: #ffffff;--color-account-tag-background: #1a1a1a;--color-account-tag-border: #3d3d3d;--color-remove-hover-background: #292929;--color-notice-background: #181818;--color-notice-text: #ffffff;--color-notice-accent: #ffffff;--color-error-background: #1c1c1c;--color-error-border: #777777;--color-error-text: #ffffff;--color-error-accent: #d4d4d4;--color-error-contrast: #ffffff;--color-status-online: #ffffff;--color-status-online-ring: rgba(255, 255, 255, .18);--color-status-online-pulse: rgba(255, 255, 255, .34);--color-status-connecting: #d0d0d0;--color-status-offline: #909090;--color-latency-good: #ffffff;--color-latency-medium: #cccccc;--color-latency-high: #999999;--color-room-toolbar-background: #171717;--color-room-toolbar-border: #383838;--color-room-toolbar-text: #f0f0f0;--color-room-toolbar-chip-border: rgba(255, 255, 255, .24);--color-host-chip-background: #232323;--color-guest-chip-background: #2d2d2d;--color-host-marker: #ffffff;--color-guest-marker: #aaaaaa;--color-map-background: #101010;--color-map-panel-background: #121212;--color-map-panel-border: #383838;--color-map-shadow: rgba(0, 0, 0, .46);--color-map-grid: rgba(255, 255, 255, .12);--color-map-axis: rgba(255, 255, 255, .36);--color-map-origin: #ffffff;--color-map-peer-line: rgba(255, 255, 255, .48);--color-map-label: #ffffff;--color-map-label-outline: #101010;--color-map-marker-outline: rgba(255, 255, 255, .8);--color-map-control-background: rgba(20, 20, 20, .94);--color-map-control-border: #3d3d3d;--color-map-control-shadow: rgba(0, 0, 0, .42);--color-map-control-hover: #2c2c2c;--color-map-control-text: #ffffff;--color-gomoku-background: #ffffff;--color-gomoku-panel-background: #101010;--color-gomoku-border: #383838;--color-gomoku-grid: #929ca6;--color-gomoku-shadow: rgba(0, 0, 0, .34);--color-gomoku-banner-background: #181818;--color-gomoku-piece-outline: rgba(17, 24, 39, .42);--color-gomoku-selection: #ffffff;--color-gomoku-latest: #ffffff;--color-gomoku-winning: #ffffff;--color-gomoku-turn-border: #8fd45d;--color-direction-background: #181818;--color-direction-border: #3d3d3d;--color-direction-hover: #2c2c2c;--color-direction-center: #ffffff;--color-trail-sky: #f2f2f2;--color-trail-blue: #d8d8d8;--color-trail-cyan: #bdbdbd;--color-trail-green: #a3a3a3;--color-trail-yellow: #898989;--color-trail-selection: #ffffff;--color-trail-cell-outline: rgba(255, 255, 255, .24)}: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)}body,.app-shell{transition:background-color .18s ease,color .18s ease}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)}.theme-toggle{position:fixed;z-index:20;top:max(1rem,env(safe-area-inset-top));right:max(1rem,env(safe-area-inset-right));width:42px;height:42px;display:grid;place-items:center;background:var(--color-card-background);border:1px solid var(--color-border);border-radius:50%;box-shadow:0 8px 24px var(--color-card-shadow);color:var(--color-text-button);cursor:pointer;transition:background-color .16s ease,border-color .16s ease,color .16s ease,transform .16s ease}.theme-toggle:hover{border-color:var(--color-field-hover-border);color:var(--color-text-button-hover);transform:translateY(-1px)}.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}.password-input-row{position:relative}.password-input-row 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p{margin:.55rem 0 0;color:var(--color-text-secondary);font-size:.76rem;line-height:1.6}.auth-signup-button,.auth-back-button{display:flex;align-items:center;gap:.35rem}.auth-signup-button{margin-top:1rem}.signup-password-generator{margin-top:1.4rem;padding-top:1.2rem;border-top:1px solid var(--color-border)}.password-generator-header{display:flex;align-items:flex-start;justify-content:space-between;gap:1rem}.password-generator-header h2{margin:0;font-size:.84rem}.password-generator-header p{margin:.3rem 0 0;color:var(--color-text-secondary);font-size:.66rem;line-height:1.5}.password-generator-refresh{width:32px;height:32px;flex:0 0 32px;display:grid;place-items:center;padding:0;background:var(--color-tool-background);border:1px solid var(--color-tool-border);border-radius:8px;color:var(--color-tool-text);cursor:pointer}.password-generator-refresh:hover,.password-generator-result button:hover{background:var(--color-tool-hover-background);border-color:var(--color-tool-hover-border)}.password-generator-result{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:.55rem;margin-top:.8rem}.password-generator-result output{min-width:0;min-height:42px;display:flex;align-items:center;overflow-x:auto;padding:0 .8rem;background:var(--color-field-background);border:1px solid var(--color-field-border);border-radius:9px;color:var(--color-text-primary);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.8rem;font-weight:700;letter-spacing:.06em;white-space:nowrap}.password-generator-result button{min-height:42px;display:inline-flex;align-items:center;gap:.35rem;padding:0 .75rem;background:var(--color-tool-background);border:1px solid 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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)}.game-mode-switch,.mode-switch{display:grid;grid-template-columns:1fr 1fr;margin-bottom:1rem;padding:4px;background:var(--color-segment-background);border-radius:10px}.game-mode-switch button,.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}.game-mode-switch button.active,.mode-switch button.active{background:var(--color-card-background);color:var(--color-text-primary);box-shadow:0 1px 5px var(--color-card-shadow)}.game-mode-field>span{display:block;margin-bottom:.5rem;color:var(--color-field-label);font-size:.76rem;font-weight:650;letter-spacing:.03em}.game-mode-switch{margin-bottom:1.1rem}.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)}.room-members .member-self{border-color:var(--color-primary-button);box-shadow:0 0 0 2px var(--color-focus-ring)}.member-self-badge{margin-left:.35rem;padding:.12rem .32rem;background:var(--color-primary-button);border-radius:999px;color:var(--color-primary-button-text);font-size:.58rem;line-height:1}.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 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var(--color-gomoku-selection)}.gomoku-intersection:disabled{cursor:default}.gomoku-piece{position:relative;z-index:1;width:100%;aspect-ratio:1;display:grid;place-items:center}.gomoku-piece-custom{color:var(--piece-color);filter:drop-shadow(0 1px 1px var(--color-gomoku-piece-outline))}.gomoku-piece-solid-circle{width:100%;background:var(--piece-color);border:1px solid var(--color-gomoku-piece-outline);border-radius:50%;box-shadow:0 1px 2px var(--color-gomoku-piece-outline)}.gomoku-piece-icon svg{width:86%;height:86%;fill:none;stroke:currentColor;stroke-width:2.5}.gomoku-piece-glyph{font-family:PingFang SC,Microsoft YaHei,system-ui,sans-serif;font-size:clamp(1rem,3vw,1.9rem);font-weight:800;line-height:1}.gomoku-piece-preview{opacity:.48}.gomoku-piece-latest:after{position:absolute;top:-2px;right:-2px;width:7px;aspect-ratio:1;background:var(--color-gomoku-latest);border:1px solid var(--color-gomoku-banner-background);border-radius:50%;content:""}.gomoku-piece-winning{filter:drop-shadow(0 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1rem}.panel{border-radius:14px}.board-toolbar{display:flex;align-items:flex-start;flex-direction:column;gap:.5rem}.gomoku-game-banner{align-items:flex-start;flex-direction:column;gap:.25rem}.gomoku-banner-details{justify-content:flex-start;text-align:left}.piece-customizer{grid-template-columns:minmax(0,1fr)}.piece-customizer-popover{top:.65rem;right:.65rem;width:calc(100% - 1.3rem)}.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}.gomoku-content{padding:.65rem}.gomoku-board-surface{border-radius:8px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}