:root{--color-white: #ffffff;--color-primary: #69923e;--color-primary-dark: #4e7837;--color-text: #2c2b29;--color-text-muted: #4b4847;--color-border: #d9d9d9;--color-border-strong: #cfcfcf;--color-surface: #ffffff;--color-surface-soft: #f7f7f7;--color-error-bg: #fef2f2;--color-error-border: #fca5a5;--color-error-text: #b91c1c;--color-warning-bg: #fffbeb;--color-warning-border: #fcd34d;--color-warning-text: #92400e;--shadow-soft: 0 8px 24px rgba(44, 43, 41, .08);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px}*{box-sizing:border-box}body{margin:0;font-family:Avenir Next,Segoe UI,sans-serif;background:var(--color-white);color:var(--color-text)}a{color:inherit}button,input{font:inherit}.page{min-height:100vh;padding:24px}.container{width:100%;max-width:1360px;margin:0 auto}.app-shell{background:var(--color-white);color:var(--color-text)}.topbar{border-bottom:1px solid var(--color-border);background:var(--color-white)}.topbar-inner{height:72px;display:flex;justify-content:space-between;align-items:center;padding:0 24px}.brand{margin:0;font-size:1.45rem;font-weight:700}.topbar-right{display:flex;gap:12px;align-items:center;color:var(--color-text-muted)}.screen{min-height:calc(100vh - 72px);padding:28px 24px}.topbar-room{display:flex;flex-direction:column;align-items:flex-end;gap:4px}.topbar-room__title{font-weight:700;color:var(--color-text)}.topbar-room__id{font-size:.9rem;font-weight:600;color:var(--color-text-muted)}.screen h1,.screen h2,.screen h3,.screen p{margin:0}.stack{display:flex;flex-direction:column;gap:12px}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-soft);padding:20px}.btn{border-radius:var(--radius-md);border:1px solid transparent;padding:12px 16px;font-weight:700;cursor:pointer}.btn:disabled{opacity:.65;cursor:not-allowed}.btn-primary{background:var(--color-primary);color:var(--color-white)}.btn-secondary{background:var(--color-white);color:var(--color-text);border-color:var(--color-border)}.btn-ghost{background:transparent;color:var(--color-text-muted)}.btn-danger{background:var(--color-warning-bg);color:var(--color-warning-text);border-color:var(--color-warning-border)}.field{display:flex;flex-direction:column;gap:8px}.field-label{color:var(--color-text-muted);font-size:.88rem}.input{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-white);padding:12px}.alert{border-radius:var(--radius-md);border:1px solid;padding:12px}.alert-title{font-weight:700;margin:0}.alert-message{margin:6px 0 0}.alert-error{background:var(--color-error-bg);border-color:var(--color-error-border);color:var(--color-error-text)}.alert-warning{background:var(--color-warning-bg);border-color:var(--color-warning-border);color:var(--color-warning-text)}.section-title{font-size:1.55rem;font-weight:700}.section-subtitle{color:var(--color-text-muted);margin-top:6px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:22px}.three-col-layout{display:grid;grid-template-columns:minmax(520px,1.75fr) minmax(320px,.85fr);gap:20px;align-items:start}.board-wrap{padding:16px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-white)}.board{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));width:100%;grid-auto-rows:1fr;aspect-ratio:8 / 8;overflow:visible;border:1px solid var(--color-border);--square-highlight-color: color-mix(in srgb, var(--color-primary) 70%, transparent);--square-check-color: color-mix(in srgb, var(--color-warning-border) 80%, transparent);--square-last-move-color: color-mix(in srgb, #60a5fa 70%, transparent)}.board-wrap{display:flex;justify-content:center}.board-shell{--board-label-height: 18px;display:flex;flex-direction:column;align-items:center;gap:6px;width:100%}.board-grid{display:grid;grid-template-columns:auto 1fr auto;grid-template-rows:var(--board-label-height) 1fr var(--board-label-height);align-items:stretch;width:100%;gap:12px}.board-labels{color:var(--color-text-muted);font-size:.75rem;font-weight:600;letter-spacing:.1em}.board-labels--columns{display:grid;grid-template-columns:repeat(8,minmax(42px,1fr));width:100%;text-transform:uppercase;justify-items:center;align-items:center;height:var(--board-label-height)}.board-labels--ranks{display:grid;grid-template-rows:repeat(8,1fr);justify-items:center;align-items:center;min-width:20px;padding-block:calc(var(--board-label-height) + 18px);box-sizing:border-box}.board-grid__columns{grid-column:2}.board-grid__columns--top{grid-row:1}.board-grid__columns--bottom{grid-row:3}.board-grid__board{grid-column:2;grid-row:2}.board-grid__ranks{grid-row:1 / span 3}.board-grid__ranks--left{grid-column:1}.board-grid__ranks--right{grid-column:3}.board-player{text-align:center;display:flex;flex-direction:column;gap:2px}.board-player__caption{font-size:.7rem;text-transform:uppercase;letter-spacing:.2em}.square{position:relative;display:flex;align-items:center;justify-content:center}.piece-clickable{cursor:pointer}.square-selected{position:relative}.square-selected:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;z-index:4;pointer-events:none;box-shadow:inset 0 0 0 1px var(--square-highlight-color),0 0 0 1px var(--square-highlight-color)}.square-target,.square-opponent-last-move{position:relative}.square-target:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;z-index:4;pointer-events:none;box-shadow:inset 0 0 0 1px var(--square-highlight-color),0 0 0 1px var(--square-highlight-color)}.square-opponent-last-move:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;z-index:3;pointer-events:none;box-shadow:inset 0 0 0 1px var(--square-last-move-color),0 0 0 1px var(--square-last-move-color)}.square.square-selected:after,.square.square-target:after{z-index:4;box-shadow:inset 0 0 0 1px var(--square-highlight-color),0 0 0 1px var(--square-highlight-color)}.review-board-card .square-selected:after,.review-board-card .square-target:after{box-shadow:inset 0 0 0 1px var(--square-last-move-color),0 0 0 1px var(--square-last-move-color)}.square-check{position:relative}.square-check:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;z-index:2;pointer-events:none;box-shadow:inset 0 0 0 1px var(--square-check-color),0 0 0 1px var(--square-check-color)}.check-icon{position:absolute;top:6px;right:6px;z-index:3;display:inline-flex;align-items:center;justify-content:center;color:var(--color-warning-text);pointer-events:none}.square-light{background:#eef4e8}.square-dark{background:#dbe8cf}.square-fog{position:relative}.square-fog:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;z-index:1;pointer-events:none}.square-light.square-fog:before{background:color-mix(in srgb,#4b4847 26%,white)}.square-dark.square-fog:before{background:color-mix(in srgb,#4b4847 36%,white)}.square-terrain-mountain{background:color-mix(in srgb,#4e7837 32%,white)}.square-terrain-water{background:color-mix(in srgb,#5b7594 24%,white)}.terrain-icon{color:var(--color-text);opacity:.75;position:absolute;bottom:6px;left:6px}.legend-row{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.legend-item{display:inline-flex;align-items:center;gap:7px;color:var(--color-text-muted);font-size:.84rem}.icon-chip{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%}.icon-chip--board{width:42px;height:42px}.icon-chip-outlined{border:1px solid var(--color-border)}.icon-chip-white{background:var(--color-white);color:var(--color-text)}.icon-chip-black{background:var(--color-text);color:var(--color-white);border-color:var(--color-text)}.side-stack{display:flex;flex-direction:column;gap:16px;height:100%;align-self:stretch}.side-stack>.card{min-height:0}.card--match-status{flex:0 0 auto}.card--move-history{flex:1 1 auto;height:320px}.meta-grid{display:grid;grid-template-columns:120px 1fr;gap:10px 12px;margin-bottom:10px}.meta-label{color:var(--color-text-muted);font-size:.9rem}.meta-value{font-weight:700}.move-list{overflow-y:auto;height:100px;flex-grow:1;display:flex;flex-direction:column;gap:10px}.move-item{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;border:1px solid var(--color-border);border-radius:10px;padding:10px;background:var(--color-white);font-family:IBM Plex Mono,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace}.move-item[role=button]:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.move-time{color:var(--color-text-muted);font-size:.82rem}.move-capture-inline{margin-left:30px;display:inline-flex;align-items:center;gap:4px}.move-capture-indicator{color:var(--color-error-text)}.move-check-inline{margin-left:30px;display:inline-flex;align-items:center;gap:4px}.move-check-indicator{color:var(--color-warning-text)}.move-promotion-inline{margin-left:30px;display:inline-flex;align-items:center;gap:4px}.move-promotion-indicator{color:var(--color-primary-dark);font-weight:700;line-height:1}.move-castle-inline{margin-left:30px;display:inline-flex;align-items:center;gap:4px}.move-castle-indicator{color:var(--color-primary-dark)}.activity-list{display:flex;flex-direction:column;gap:10px}.activity-item{border:1px solid var(--color-border);border-radius:10px;padding:12px;display:flex;justify-content:space-between;align-items:center;gap:12px;color:var(--color-text-muted);background:var(--color-white)}.activity-item--link{text-decoration:none;color:inherit}.activity-item__main{display:flex;justify-content:space-between;gap:12px;width:100%}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a66;display:flex;align-items:center;justify-content:center;z-index:40}.modal{background:var(--color-white);border-radius:var(--radius-lg);border:1px solid var(--color-border);box-shadow:var(--shadow-soft);padding:24px;width:min(420px,90vw);display:flex;flex-direction:column;gap:16px}.promotion-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.promotion-option{display:inline-flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);cursor:pointer;font-weight:600}.promotion-option:hover{border-color:var(--color-primary)}.modal-actions{display:flex;justify-content:flex-end}.modal-actions--split{justify-content:space-between;gap:12px}.auth-shell{min-height:100vh;display:grid;place-items:center;padding:24px}.auth-card{width:min(520px,100%)}.review-layout{display:grid;grid-template-columns:minmax(460px,.95fr) minmax(480px,1.3fr);gap:20px;align-items:stretch}.review-layout>.card{height:100%}.review-moves-card{min-height:0}.review-moves-card .move-list{display:block;height:100px;overflow-y:auto;flex-grow:1}.review-moves-card .move-list .move-item{margin-bottom:10px}.review-moves-card .move-list .move-item:last-child{margin-bottom:0}@media (max-width: 1080px){.two-col,.three-col-layout,.review-layout{grid-template-columns:1fr}.screen{padding:20px 16px}.topbar-inner{padding:0 16px}}