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var(--black);transform:translate(-2px,-2px)}.auth-form{display:flex;flex-direction:column;gap:16px;text-align:left}.input-group{display:flex;flex-direction:column;gap:6px}.input-label{font-family:var(--font-mono);font-size:.75rem;font-weight:700;text-transform:uppercase;color:#333;display:flex;align-items:center;gap:6px}.auth-input{width:100%;font-family:var(--font-body);font-size:.9rem;font-weight:600;padding:10px 12px;border:var(--border-sm);outline:none;background:var(--white);transition:all .15s}.auth-input:focus{border-color:var(--orange);box-shadow:3px 3px 0 var(--black)}.auth-submit-btn{width:100%;padding:12px;font-size:.9rem;margin-top:12px}.auth-error-msg{background:#fff0f0;border:2px solid var(--red);color:var(--red);font-weight:700;padding:10px;font-size:.8rem;margin-bottom:16px;text-align:center}.auth-modal-footer{margin-top:20px;font-size:.82rem;color:#666}.auth-modal-footer a{color:var(--blue);font-weight:700;text-decoration:none}.auth-modal-footer a:hover{text-decoration:underline}.auth-divider{display:flex;align-items:center;text-align:center;margin:12px 0;font-family:var(--font-mono);font-size:.75rem;color:#888}.auth-divider:before,.auth-divider:after{content:"";flex:1;border-bottom:2px dashed #ccc}.auth-divider span{padding:0 10px}.auth-guest-btn{width:100%;padding:12px;font-size:.9rem;background:var(--bg)!important}.auth-guest-btn:hover{background:var(--yellow)!important;color:var(--black)!important}.lang-selector-dropdown{position:relative;display:inline-block;margin-right:12px;text-align:left}.lang-dropdown-toggle{display:flex;align-items:center;gap:8px;padding:8px 14px;font-family:var(--font-mono);font-size:.85rem;font-weight:800;text-transform:uppercase;height:42px}.lang-flag{font-size:1.2rem;line-height:1}.lang-chevron{font-size:.75rem;transition:transform .2s ease}.lang-chevron.open{transform:rotate(180deg)}.lang-dropdown-menu{position:absolute;top:calc(100% + 8px);right:0;background:var(--white);border:3px solid var(--black);box-shadow:4px 4px 0 var(--black);padding:6px 0;list-style:none;min-width:150px;z-index:9999;margin:0}.lang-dropdown-item{width:100%;display:flex;align-items:center;gap:10px;padding:10px 16px;background:transparent;border:none;font-family:var(--font-body);font-size:.85rem;font-weight:700;text-align:left;cursor:pointer;transition:all .1s;color:var(--black)}.lang-dropdown-item:hover{background:var(--yellow);color:var(--black)}.lang-dropdown-item.active{background:var(--bg);border-left:4px solid var(--yellow)}.avatar-selector-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:4px}.avatar-option-btn{font-size:1.5rem;padding:8px;background:var(--bg);border:2px solid var(--black);cursor:pointer;transition:all .1s;display:flex;align-items:center;justify-content:center}.avatar-option-btn:hover{background:var(--gray-light);transform:translate(-1px,-1px);box-shadow:2px 2px 0 var(--black)}.avatar-option-btn.active{background:var(--yellow);transform:translate(-2px,-2px);box-shadow:3px 3px 0 var(--black);border-color:var(--black)}.profile-avatar{font-size:1.2rem;margin-right:4px}.leaderboard-info-pill{font-family:var(--font-mono);font-size:.75rem;font-weight:700;background:var(--bg);border:2px solid var(--black);padding:8px 12px;box-shadow:3px 3px 0 var(--black)}.leaderboard-player-cell{display:flex;align-items:center;gap:12px}.leaderboard-player-avatar{font-size:1.8rem;line-height:1;background:var(--bg);border:2px solid var(--black);width:40px;height:40px;display:flex;align-items:center;justify-content:center;box-shadow:2px 2px 0 var(--black)}.leaderboard-player-names{display:flex;flex-direction:column}.leaderboard-player-fullname{font-weight:800;font-size:.95rem;color:var(--black)}.leaderboard-player-username{font-family:var(--font-mono);font-size:.75rem;color:#666}.self-tag-badge{font-family:var(--font-mono);font-size:.65rem;font-weight:800;background:var(--yellow);color:var(--black);border:1px solid var(--black);padding:2px 6px;margin-left:auto;box-shadow:1px 1px 0 var(--black)}.rank-emoji-badge{font-size:1.5rem}.history-table tbody tr.rank-gold{background:#ffd70014}.history-table tbody tr.rank-silver{background:#c0c0c014}.history-table tbody tr.rank-bronze{background:#cd7f3214}.history-table tbody tr.rank-self{background:#ffc1071f!important;font-weight:700}.history-table tbody tr.rank-gold:hover{background:#ffd70026!important}.history-table tbody tr.rank-silver:hover{background:#c0c0c026!important}.history-table tbody tr.rank-bronze:hover{background:#cd7f3226!important}.history-main-layout{flex:1;padding:32px 24px;overflow-y:visible}.history-container{max-width:1100px;width:100%;margin:0 auto}.history-header-actions{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.history-header-actions h2{font-size:1.6rem;font-weight:900;text-transform:uppercase;display:flex;align-items:center;gap:12px}.btn-clear-all{font-size:.8rem;padding:8px 16px}.history-empty-card{padding:60px 40px;text-align:center;background:var(--white);display:flex;flex-direction:column;align-items:center;gap:16px}.empty-icon{font-size:4rem;color:#ccc;line-height:1}.history-empty-card h3{font-size:1.6rem;font-weight:900}.history-empty-card p{color:#555;font-size:.95rem;max-width:500px;line-height:1.6}.history-table-wrapper{background:var(--white);overflow:hidden;margin-bottom:32px}.history-table{width:100%;border-collapse:collapse;text-align:left}.history-table th,.history-table td{padding:16px 20px;border-bottom:2px solid var(--black)}.history-table th{background:var(--black);color:var(--white);font-family:var(--font-mono);font-size:.78rem;font-weight:700;text-transform:uppercase}.history-table td{font-weight:600;font-size:.9rem}.history-table tbody tr{transition:background-color .15s}.history-table tbody tr:hover{background-color:var(--gray-light)}.font-mono{font-family:var(--font-mono)!important}.history-diff-badge{font-family:var(--font-mono);font-size:.72rem;font-weight:700;background:#eee;border:1px solid var(--black);padding:3px 8px}.outcome-badge{display:inline-block;font-family:var(--font-body);font-weight:800;font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;padding:5px 12px;border:var(--border-sm);box-shadow:2px 2px 0 var(--black)}.outcome-win{background:var(--green);color:var(--black)}.outcome-loss{background:var(--red);color:var(--white)}.outcome-draw{background:var(--yellow);color:var(--black)}.btn-delete-item{background:transparent;border:none;color:#777;cursor:pointer;font-size:1.1rem;padding:6px;transition:all .1s}.btn-delete-item:hover{color:var(--red);transform:scale(1.15)}@media(max-width:1400px){.main-layout{grid-template-columns:260px 1fr 300px;gap:20px;padding:20px}.board-container{max-width:610px;padding:16px}.hero-title{font-size:3.2rem}}@media(max-width:1200px){.page{overflow-y:auto;max-height:none;height:auto}.main-layout{grid-template-columns:1fr;gap:20px;padding:20px;height:auto;overflow:visible}.sidebar{height:auto;max-height:none}.sidebar-left{order:1}.board-area{order:2;max-height:none;height:auto}.sidebar-right{order:3}.stats-grid{grid-template-columns:repeat(4,1fr)}.move-history-section{min-height:250px;height:auto}.move-history-scroll{max-height:300px}.board-container{max-width:660px;padding:20px}.hero-grid{grid-template-columns:1fr;gap:48px}.hero-visual{order:-1}.engines-grid{grid-template-columns:1fr;gap:24px}.guide-grid{grid-template-columns:1fr;gap:32px}.header-nav{display:none}}@media(max-width:1024px){.board-area{max-height:calc(100vh - 160px)}.board-container{max-width:560px;padding:16px}.game-banner{padding:14px 20px}.banner-title{font-size:1rem}.banner-icon{font-size:1.6rem}.hero-title{font-size:2.8rem}}@media(max-width:768px){.main-layout{padding:12px;gap:12px}.header{padding:10px 16px}.header-title{font-size:1.1rem}.header-subtitle{font-size:.65rem}.logo-img-header{height:34px}.action-buttons{grid-template-columns:1fr 1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}.chess-timers{gap:8px}.timer-value{font-size:1.5rem}.modal-content{padding:30px 20px}.modal-title{font-size:2rem}.modal-icon{font-size:4rem}.modal-stat-value{font-size:2rem}.board-area{max-height:calc(100vh - 140px)}.board-container{padding:10px;max-width:100%}.game-banner{padding:12px 16px}.banner-title{font-size:.9rem}.banner-sub{font-size:.7rem}.banner-icon{font-size:1.4rem}.sidebar-section{padding:16px}.move-history-scroll{max-height:250px}.hero-section,.engines-section,.guide-section{padding:32px 20px}.history-header-actions{flex-direction:column;align-items:flex-start;gap:14px}}@media(max-width:480px){.main-layout{padding:8px;gap:10px}.header{padding:8px 12px}.header-status{display:none}.board-area{max-height:calc(100vh - 120px);gap:10px}.board-container{padding:8px}.game-banner{padding:10px 12px}.banner-title{font-size:.85rem}.banner-sub{font-size:.65rem}.footer{padding:12px 16px;font-size:.7rem;flex-direction:column;gap:8px;text-align:center}.hero-title{font-size:2.2rem}.hero-actions{flex-direction:column;width:100%}.hero-actions .btn{width:100%}.promotion-options-grid{grid-template-columns:1fr}}