*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:#f5f3ed;min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;gap:20px;padding:20px;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}.game-container{background:#fff;border-radius:16px;box-shadow:0 2px 12px #0000000f;padding:24px;display:flex;flex-direction:column;gap:20px;max-width:100%}.game-header{display:flex;flex-direction:column;gap:12px}.game-title{font-size:20px;font-weight:600;color:#2c2c2a;text-align:center}.status-bar{display:flex;align-items:center;gap:16px;justify-content:center}.status-item{display:flex;align-items:center;gap:6px;background:#f1efe8;border-radius:8px;padding:6px 12px}.status-icon{font-size:13px;line-height:1}.status-label{font-size:11px;color:#888780}.status-value{font-size:16px;font-weight:600;color:#2c2c2a;font-variant-numeric:tabular-nums;min-width:32px;text-align:right}.mine-counter .status-value{color:#e24b4a}.timer .status-value{color:#378add}.restart-btn{background:#5dcaa5;color:#04342c;border:none;border-radius:8px;padding:8px 16px;font-size:13px;font-weight:600;cursor:pointer;transition:background .15s;-webkit-tap-highlight-color:transparent}.restart-btn:hover{background:#4bbf99}.restart-btn:active{background:#3db88f}.mode-bar{display:flex;gap:8px;justify-content:center}.difficulty-bar{display:flex;gap:6px;justify-content:center}.diff-btn{background:#f1efe8;border:2px solid transparent;border-radius:8px;padding:5px 14px;font-size:12px;font-weight:500;color:#888780;cursor:pointer;transition:all .15s;-webkit-tap-highlight-color:transparent}.diff-btn.active{background:#e8f4ee;border-color:#5dcaa5;color:#1d9e75}.sound-btn{background:#f1efe8;border:none;border-radius:8px;padding:8px 10px;font-size:16px;cursor:pointer;transition:background .15s;-webkit-tap-highlight-color:transparent;line-height:1}.sound-btn:hover{background:#e8e6dd}.mode-btn{display:flex;align-items:center;gap:6px;background:#f1efe8;border:2px solid transparent;border-radius:8px;padding:6px 16px;font-size:13px;font-weight:500;color:#888780;cursor:pointer;transition:all .15s;-webkit-tap-highlight-color:transparent}.mode-btn .mode-icon{font-size:16px}.mode-btn.active{background:#e8f4ee;border-color:#5dcaa5;color:#1d9e75}.mode-btn.active[data-mode=flag]{background:#fde8f0;border-color:#d4537e;color:#d4537e}.board-wrapper{position:relative;display:flex;justify-content:center;align-items:center;padding:12px;background:#d3d1c7;border-radius:12px;overflow:auto;-webkit-overflow-scrolling:touch}#game-canvas{display:block;cursor:pointer;touch-action:none}.overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(.9);background:#fff;border-radius:16px;box-shadow:0 8px 32px #0000002e;padding:16px 24px 20px;display:none;align-items:center;justify-content:center;flex-direction:column;gap:8px;min-width:200px;max-width:80%;z-index:10;opacity:0;transition:opacity .25s ease,transform .25s ease}.overlay.visible{display:flex;opacity:1;transform:translate(-50%,-50%) scale(1)}.overlay-content{display:flex;flex-direction:column;align-items:center;gap:10px}.overlay-title{font-size:22px;font-weight:700;line-height:1.2;text-align:center;margin:0}.overlay-title.win{color:#1d9e75}.overlay-title.lose{color:#e24b4a}.overlay-subtitle{font-size:13px;color:#888780;margin:0;text-align:center}.overlay-best{font-size:12px;color:#5dcaa5;font-weight:600;margin:0;text-align:center}.overlay .restart-btn{margin-top:4px;padding:8px 20px;font-size:13px;min-width:120px}.overlay-inputs{display:flex;gap:8px;margin-top:4px}.overlay-name-input,.overlay-region-input{padding:8px 12px;font-size:14px;border:2px solid #cfcdc3;border-radius:8px;width:120px;text-align:center;outline:none;font-family:inherit;box-sizing:border-box;-webkit-user-select:text;user-select:text}.overlay-name-input:focus,.overlay-region-input:focus{border-color:#5dcaa5}.overlay-subtitle{font-size:14px;color:#888780}.game-footer{text-align:center}.hint-text{font-size:12px;color:#888780}@media (max-width: 600px){body{padding:6px}.game-container{padding:14px;gap:14px;border-radius:12px;width:100%}.game-title{font-size:18px}.status-bar{gap:6px;flex-wrap:wrap}.status-item{padding:4px 8px}.status-label{display:none}.status-value{font-size:15px}.restart-btn{padding:6px 12px;font-size:12px}.mode-btn{padding:6px 14px;font-size:12px;flex:1;justify-content:center}.diff-btn{padding:4px 10px;font-size:11px}.sound-btn{padding:6px 8px;font-size:14px}.hint-text{font-size:11px;line-height:1.5}}@media (max-width: 380px){.game-container{padding:10px;gap:10px}.status-bar{gap:4px}.status-item{padding:3px 6px}.status-icon{font-size:11px}.status-value{font-size:14px;min-width:24px}.restart-btn{padding:5px 10px;font-size:11px}}@media (orientation: landscape) and (max-height: 500px){body{padding:4px;align-items:center}.game-container{padding:10px;gap:8px}.game-title{font-size:16px}.hint-text{display:none}}.lb-trigger-btn{background:#f1efe8;border:none;border-radius:8px;padding:8px 10px;font-size:16px;cursor:pointer;transition:background .15s;-webkit-tap-highlight-color:transparent;line-height:1}.lb-trigger-btn:hover{background:#e8e6dd}.lb-inline{background:#fff;border-radius:16px;box-shadow:0 2px 12px #0000000f;padding:20px;display:flex;flex-direction:column;gap:14px;width:500px;max-width:100%}.lb-inline-header{display:flex;flex-direction:column;gap:10px}.lb-inline-title{font-size:16px;font-weight:700;color:#2c2c2a;text-align:center}.lb-diff-tabs,.lb-period-tabs{display:flex;gap:6px}.lb-period-tabs.hidden{display:none}.lb-tab{flex:1;background:#f1efe8;border:2px solid transparent;border-radius:8px;padding:6px 8px;font-size:12px;font-weight:500;color:#888780;cursor:pointer;transition:all .15s;-webkit-tap-highlight-color:transparent;text-align:center}.lb-tab.active{background:#e8f4ee;border-color:#5dcaa5;color:#1d9e75}.lb-yearly-champions{display:flex;flex-direction:column;gap:8px}.lb-yc-title{font-size:13px;font-weight:700;color:#ba7517;text-align:center}.lb-yc-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.lb-yc-card{background:#fff8ec;border:2px solid #fac775;border-radius:10px;padding:8px 10px;display:flex;flex-direction:column;gap:3px;align-items:center;text-align:center}.lb-yc-diff{font-size:11px;font-weight:700;color:#ba7517}.lb-yc-name{font-size:14px;font-weight:700;color:#2c2c2a;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lb-yc-region{font-size:11px;color:#5d7a9e;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lb-yc-time{font-size:16px;font-weight:700;color:#1d9e75;font-variant-numeric:tabular-nums}.lb-yc-date{font-size:10px;color:#888780}.lb-yc-empty{font-size:12px;color:#888780;padding:6px 0}.lb-scroll-viewport{height:360px;overflow-y:auto;-webkit-overflow-scrolling:touch}.lb-scroll-track{display:flex;flex-direction:column;gap:4px}.lb-row{display:grid;grid-template-columns:30px 1fr 70px 52px 70px;align-items:center;gap:8px;background:#f8f7f3;border-radius:8px;padding:8px 12px}.lb-name{font-size:13px;font-weight:600;color:#2c2c2a;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lb-region{font-size:12px;color:#5d7a9e;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lb-row-top{background:#fff5e6;border:2px solid #fac775}.lb-rank{font-size:14px;font-weight:700;color:#888780;text-align:center}.lb-row-top .lb-rank{color:#ba7517}.lb-time{font-size:15px;font-weight:600;color:#2c2c2a;font-variant-numeric:tabular-nums}.lb-date{font-size:11px;color:#888780}.lb-empty{text-align:center;color:#888780;font-size:13px;padding:30px 0}@media (max-width: 600px){.lb-inline{width:100%;padding:14px}.lb-inline-title{font-size:15px}.lb-tab{padding:5px 6px;font-size:11px}.lb-time{font-size:14px}.lb-row{grid-template-columns:24px 1fr 56px 44px 60px;gap:6px;padding:6px 8px}.lb-scroll-viewport{height:280px}.lb-yc-cards{grid-template-columns:1fr}}@media (orientation: landscape) and (max-height: 500px){.lb-inline{display:none}}.site-nav{display:flex;gap:6px;justify-content:center;flex-wrap:wrap}.nav-btn{background:#fff;border:2px solid #e0ddd2;border-radius:8px;padding:6px 16px;font-size:13px;font-weight:500;color:#5a5850;cursor:pointer;transition:all .15s;-webkit-tap-highlight-color:transparent;text-decoration:none}.nav-btn:hover{background:#f1efe8;border-color:#cfcdc3}.nav-btn:active{background:#e8e6dd}.nav-user{display:flex;gap:6px;align-items:center;margin-left:4px}.nav-auth-btn{background:#5dcaa5;border-color:#5dcaa5;color:#fff}.nav-auth-btn:hover{background:#4cb88f;border-color:#4cb88f}.nav-user-info{display:flex;align-items:center;gap:6px}.nav-username{font-size:13px;font-weight:600;color:#5dcaa5;max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.nav-logout-btn{background:#fff;border:2px solid #e0ddd2;border-radius:8px;padding:6px 12px;font-size:12px;color:#999588;cursor:pointer;transition:all .15s}.nav-logout-btn:hover{border-color:#e24b4a;color:#e24b4a}.auth-modal{position:fixed;top:0;right:0;bottom:0;left:0;background:#28262073;display:none;align-items:center;justify-content:center;z-index:1000;padding:16px}.auth-modal.visible{display:flex}.auth-modal-content{position:relative;background:#fff;border-radius:16px;box-shadow:0 12px 40px #00000040;padding:24px 24px 20px;width:100%;max-width:320px;box-sizing:border-box}.auth-modal-title{font-size:18px;font-weight:700;color:#3a3830;text-align:center;margin:0 0 16px}.auth-form{display:flex;flex-direction:column;gap:10px}.auth-input{padding:10px 14px;font-size:14px;border:2px solid #cfcdc3;border-radius:10px;width:100%;box-sizing:border-box;outline:none;font-family:inherit;text-align:center;-webkit-user-select:text;user-select:text}.auth-input:focus{border-color:#5dcaa5}.auth-error{font-size:12px;color:#e24b4a;text-align:center;min-height:16px;margin:0}.auth-submit-btn{padding:10px;font-size:15px;font-weight:600;color:#fff;background:#5dcaa5;border:none;border-radius:10px;cursor:pointer;transition:background .15s}.auth-submit-btn:hover{background:#4cb88f}.auth-submit-btn:disabled{background:#b8d8cd;cursor:not-allowed}.auth-switch{background:none;border:none;font-size:13px;color:#888780;cursor:pointer;text-align:center;padding:2px;transition:color .15s}.auth-switch:hover{color:#5dcaa5}.auth-close{position:absolute;top:8px;right:12px;background:none;border:none;font-size:24px;line-height:1;color:#aaa8a0;cursor:pointer;padding:4px}.auth-close:hover{color:#5a5850}.activity-notices{width:100%;max-width:680px;display:flex;flex-direction:column;gap:6px;margin-bottom:4px}.notice-item{display:flex;align-items:center;gap:8px;background:linear-gradient(135deg,#fff9e6,#fff4d6);border:1.5px solid #fac775;border-radius:8px;padding:8px 14px;font-size:13px;overflow:hidden}.notice-item.notice-new{border-color:#5dcaa5;background:linear-gradient(135deg,#e8f7ef,#d8f5e8)}.notice-badge{flex-shrink:0;font-size:10px;font-weight:700;padding:2px 6px;border-radius:4px;background:#5dcaa5;color:#fff;letter-spacing:.5px}.notice-new .notice-badge{background:#e85d5d}.notice-date{flex-shrink:0;font-size:12px;color:#888780;font-variant-numeric:tabular-nums}.notice-title{flex-shrink:0;font-weight:600;color:#2c2c2a;white-space:nowrap}.notice-content{flex:1;color:#5a5850;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.ad-slot{width:100%;max-width:728px;min-height:90px;display:flex;align-items:center;justify-content:center;background:repeating-linear-gradient(45deg,#f8f7f3,#f8f7f3 10px,#f1efe8 10px,#f1efe8 20px);border:2px dashed #cfcdc3;border-radius:10px;color:#aaa8a0;font-size:12px;text-align:center}.ad-slot.has-ad{background:#fff;border:1px solid #e0ddd2;min-height:auto}.ad-slot.has-ad:empty{display:none}.ad-slot.ad-top,.ad-slot.ad-bottom{max-width:728px}.ad-slot.ad-inline{max-width:500px}.challenge-section{width:100%;max-width:680px;background:#fff;border-radius:16px;box-shadow:0 2px 12px #0000000f;padding:16px 20px 20px;box-sizing:border-box}.challenge-header{display:flex;align-items:baseline;gap:12px;margin-bottom:12px;flex-wrap:wrap}.challenge-title{font-size:18px;font-weight:700;color:#2c2c2a;margin:0}.challenge-hint{font-size:12px;color:#999588}.challenge-login-hint{text-align:center;padding:12px;color:#999588;font-size:14px;background:#f8f6ee;border-radius:10px;margin-bottom:8px}.challenge-tabs{display:flex;gap:6px;margin-bottom:12px}.ch-tab{background:#f1efe8;border:none;border-radius:8px;padding:6px 16px;font-size:13px;color:#5a5850;cursor:pointer;transition:all .15s}.ch-tab.active{background:#5dcaa5;color:#fff;font-weight:600}.challenge-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}.ch-card{display:flex;flex-direction:column;align-items:stretch;padding:12px 16px;background:#f8f6ee;border-radius:12px;border:1.5px solid #ece8dc;gap:8px}.ch-card-info{flex:1;min-width:0}.ch-card-name{font-size:15px;font-weight:600;color:#2c2c2a;margin-bottom:4px}.ch-card-meta{display:flex;gap:8px;flex-wrap:wrap}.ch-badge{font-size:11px;padding:2px 8px;border-radius:6px;font-weight:500}.ch-badge-easy{background:#e8f5e9;color:#2e7d32}.ch-badge-medium{background:#fff3e0;color:#e65100}.ch-badge-hard{background:#ffebee;color:#c62828}.ch-badge-period{background:#e3f2fd;color:#1565c0}.ch-badge-target{background:#f3e5f5;color:#7b1fa2}.ch-card-right{display:flex;align-items:center;justify-content:space-between;gap:8px}.ch-card-amount{font-size:18px;font-weight:700;color:#e24b4a}.ch-card-amount-label{font-size:11px;color:#999588}.ch-join-btn{margin-top:0;padding:6px 16px;font-size:13px;font-weight:600;color:#fff;background:#5dcaa5;border:none;border-radius:8px;cursor:pointer;transition:background .15s;flex-shrink:0}.ch-join-btn:hover{background:#4cb88f}.ch-join-btn:disabled{background:#b8d8cd;cursor:not-allowed}.ch-empty{text-align:center;padding:20px;color:#aaa8a0;font-size:14px}.my-challenges{display:flex;flex-direction:column;gap:10px}.mc-item{padding:12px 16px;background:#f8f6ee;border-radius:12px;border:1.5px solid #ece8dc}.mc-item-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.mc-item-name{font-size:14px;font-weight:600;color:#2c2c2a}.mc-status{font-size:11px;padding:2px 10px;border-radius:6px;font-weight:600}.mc-status-active{background:#fff3e0;color:#e65100}.mc-status-refunded{background:#e8f5e9;color:#2e7d32}.mc-status-expired{background:#f5f5f5;color:#999588}.mc-progress-bar{height:8px;background:#ece8dc;border-radius:4px;overflow:hidden;margin-bottom:4px}.mc-progress-fill{height:100%;background:#5dcaa5;border-radius:4px;transition:width .3s}.mc-progress-text{font-size:12px;color:#888780;display:flex;justify-content:space-between}.mc-expire-text{font-size:11px;color:#aaa8a0;margin-top:4px}.mc-deadline{font-size:12px;color:#888;margin-top:4px}.mc-user-info{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:10px 14px;background:#f8f7f4;border-radius:10px;margin-bottom:10px;font-size:13px}.mc-user-info .mc-user-name{font-weight:600;font-size:14px;color:#333}.mc-user-info .mc-user-region{color:#666}.mc-user-info .mc-user-reg{color:#999;margin-left:auto}.mc-refund-box{margin-top:8px;padding:8px 10px;border-radius:8px;font-size:12px;line-height:1.8}.mc-refund-done{background:#e8f5e9;border:1px solid #c8e6c9}.mc-refund-none{background:#faf4f4;border:1px solid #e8e0e0}.mc-refund-row{display:flex;justify-content:space-between;align-items:center}.mc-refund-row>span:first-child{color:#999588}.mc-refund-amount{color:#2e7d32;font-weight:600;font-size:14px}.mc-refund-tx{color:#aaa;font-size:11px;font-family:monospace;word-break:break-all;max-width:60%;text-align:right}.site-footer{width:100%;max-width:800px;background:#fff;border-radius:16px;box-shadow:0 2px 12px #0000000f;padding:24px;display:flex;flex-direction:column;gap:20px}.footer-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.footer-section{display:flex;flex-direction:column;gap:6px}.footer-title{font-size:15px;font-weight:700;color:#2c2c2a}.footer-section p{font-size:12px;color:#888780;line-height:1.6}.footer-copyright{text-align:center;border-top:1px solid #f1efe8;padding-top:14px}.footer-copyright p{font-size:12px;color:#aaa8a0}.activity-item{background:#f8f7f3;border-radius:8px;padding:8px 12px;margin-bottom:6px}.activity-item:last-child{margin-bottom:0}.activity-date{font-size:11px;color:#5d7a9e;font-weight:600}.activity-title{font-size:13px;font-weight:700;color:#2c2c2a;margin:2px 0}.activity-content{font-size:12px;color:#666;line-height:1.5}.activity-empty{font-size:12px;color:#aaa8a0}@media (max-width: 600px){.site-nav{gap:4px}.nav-btn{padding:5px 10px;font-size:12px}.ad-slot{min-height:60px;font-size:11px}.footer-grid{grid-template-columns:1fr;gap:16px}.site-footer{padding:16px}.footer-title{font-size:14px}.footer-section p{font-size:11px}}@media (orientation: landscape) and (max-height: 500px){.site-nav,.ad-slot,.site-footer,.activity-notices{display:none}}.share-modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:#000000bf;z-index:1000;justify-content:center;align-items:center;padding:16px}.share-modal.visible{display:flex}.share-modal-content{position:relative;background:#fff;border-radius:14px;padding:20px;max-width:480px;width:100%;max-height:90vh;overflow-y:auto;box-shadow:0 8px 32px #0000004d}.share-modal-title{font-size:18px;font-weight:700;color:#2c2c2a;margin:0 0 14px;text-align:center}.share-preview-wrap{border-radius:10px;overflow:hidden;background:#f1efe8;margin-bottom:14px;max-height:420px;display:flex;justify-content:center;align-items:center}.share-preview-img{max-width:100%;max-height:420px;display:block}.share-text-box{background:#f8f6ee;border-radius:8px;padding:10px 12px;font-size:13px;color:#5f5e5a;line-height:1.6;margin-bottom:14px;word-break:break-all}.share-actions{display:flex;gap:10px}.share-btn{flex:1;padding:10px;border:none;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;transition:opacity .2s}.share-btn:hover{opacity:.85}.share-download-btn{background:#1d9e75;color:#fff}.share-copy-btn{background:#7f77dd;color:#fff}.share-close{position:absolute;top:8px;right:12px;width:30px;height:30px;border:none;background:none;font-size:24px;color:#999588;cursor:pointer;line-height:1}.share-close:hover{color:#5f5e5a}.share-trigger-btn{display:block;margin:10px auto 0;padding:8px 20px;background:#7f77dd;color:#fff;border:none;border-radius:8px;font-size:13px;font-weight:600;cursor:pointer}.share-trigger-btn:hover{background:#534ab7}.mc-share-btn{margin:8px 0 0;padding:6px 16px;font-size:12px;width:auto;display:inline-block}.ch-share-btn{margin-top:6px;padding:5px 14px;font-size:12px;width:auto;display:inline-block}
