:root{--bg:#080a0f;--panel:#111722;--panel-2:#17202d;--ink:#f7f2e7;--muted:#9aa8b7;--gold:#d7a84c;--green:#7fc7a7;--red:#e06d67;--line:#263344;color:var(--ink);background:var(--bg);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{background:radial-gradient(circle at 0 0,#203142 0,#080a0f 42%);min-width:320px}a{color:inherit;text-decoration:none}button,input,select{border:1px solid var(--line);color:var(--ink);font:inherit;border-radius:8px}button{background:var(--gold);color:#17120a;cursor:pointer;padding:12px 16px;font-weight:800}button:disabled{opacity:.65;cursor:default}input,select{background:#0d131d;padding:12px 14px}.ghost{color:var(--muted);background:0 0;margin-top:10px}.guest-button{width:100%;display:block}.shell{width:min(1180px,100%);margin:0 auto;padding:20px}.theme-green{--bg:#08100c;--panel:#101d17;--panel-2:#17291f;--ink:#f4fff8;--muted:#9fb7aa;--gold:#8fd05a;--line:#284132}.theme-light{--bg:#eef3f0;--panel:#fff;--panel-2:#e7eee9;--ink:#142018;--muted:#627066;--gold:#4f961a;--line:#cdd9d1}.topbar{justify-content:space-between;align-items:center;gap:18px;margin-bottom:22px;display:flex}.brand{align-items:center;gap:12px;font-weight:900;display:flex}.brand-mark{background:#05070a;border-radius:8px;place-items:center;width:42px;height:42px;display:grid;overflow:hidden}.brand-mark img{object-fit:contain;width:100%;height:100%}.nav{flex-wrap:wrap;gap:8px;display:flex}.nav a{color:var(--muted);border-radius:8px;padding:9px 12px}.nav a.active{background:var(--panel-2);color:var(--ink)}.account-menu{align-items:center;gap:10px;display:flex}.lang-select{background:var(--panel-2);height:42px;color:var(--ink);padding:0 10px;font-weight:800}.account-link{border:1px solid var(--line);background:var(--gold);color:#17120a;white-space:nowrap;border-radius:8px;padding:10px 14px;font-weight:800}.account-link.secondary{color:var(--muted);background:0 0;display:inline-block}.profile-menu-wrap{padding-bottom:8px;position:relative}.profile-link{background:var(--panel-2);width:42px;height:42px;color:var(--ink);border-color:var(--line);border-radius:999px;place-items:center;padding:0;display:grid;overflow:hidden}.profile-link img{object-fit:cover;width:100%;height:100%}.profile-link span{place-items:center;width:100%;height:100%;font-size:16px;font-weight:800;display:grid}.profile-popover{z-index:10;border:1px solid var(--line);opacity:0;pointer-events:none;background:#151b25;border-radius:8px;width:340px;transition:opacity .14s,transform .14s;position:absolute;top:50px;right:0;overflow:hidden;transform:translateY(-4px);box-shadow:0 14px 30px #00000059}.profile-menu-wrap:hover .profile-popover,.profile-menu-wrap:focus-within .profile-popover{opacity:1;pointer-events:auto;transform:translateY(0)}.settings-row{min-height:52px;color:var(--muted);justify-content:space-between;align-items:center;gap:14px;padding:0 18px;font-size:18px;line-height:1;display:flex}.settings-row.active{color:#fff;background:#4f961a;font-weight:800}.settings-chevron{color:#6eb648;font-size:24px;font-weight:900;line-height:1}.settings-row.active .settings-chevron{color:#fff}.menu-lang-select,.menu-theme-select,.menu-board-select,.menu-piece-select{width:76px;height:34px;color:var(--ink);border-color:var(--line);background:#0d131d;padding:0 8px;font-size:14px;font-weight:800}.menu-theme-select,.menu-board-select{width:92px}.menu-piece-select{width:98px}.connection-stats{border-top:1px solid var(--line);color:var(--muted);padding:12px 72px 14px 16px;font-size:17px;line-height:1.3;position:relative}.signal-bars{align-items:end;gap:3px;height:28px;display:flex;position:absolute;bottom:18px;right:18px}.signal-bars i{background:#5fb316;width:8px;display:block}.signal-bars i:first-child{height:10px}.signal-bars i:nth-child(2){height:16px}.signal-bars i:nth-child(3){height:22px}.signal-bars i:nth-child(4){height:28px}.account-actions{flex-wrap:wrap;gap:10px;margin-top:18px;display:flex}.lichess-profile{grid-template-columns:260px 1fr;align-items:stretch;gap:18px;display:grid}.profile-side{border-right:1px solid var(--line);color:var(--muted);align-content:start;gap:12px;padding:22px 14px;display:grid}.rating-mode{grid-template-columns:48px 1fr;align-items:center;gap:12px;min-height:66px;display:grid}.mode-mark{color:#8f98a3;opacity:.92;background:linear-gradient(135deg,#343941,#171c22);border-radius:50%;place-items:center;width:42px;height:42px;font-size:22px;font-weight:900;display:grid}.mode-mark:before{content:"?"}.mode-bullet:before{content:"•";font-size:34px}.mode-blitz:before{content:"⚡"}.mode-rapid:before{content:"♞"}.mode-classic:before{content:"♜"}.mode-puzzles:before{content:"◎"}.rating-mode strong{color:#8f98a3;letter-spacing:0;font-size:18px;font-weight:700;display:block}.rating-mode p{color:#b7c0ca;margin-top:4px}.profile-side-line{background:var(--line);height:1px;margin:8px 12px}.profile-main{border:1px solid var(--line);background:#211f1d;border-radius:8px;overflow:hidden}.profile-hero-row{background:#302d29;align-items:center;gap:18px;padding:30px 34px;display:flex}.online-dot{background:#5aa11d;border-radius:999px;width:30px;height:30px}.profile-hero-row h1{color:#cbd2dc;font-size:clamp(34px,5vw,46px);font-weight:400}.profile-actions-bar{background:#2d2a26;border-top:1px solid #3d3934;border-bottom:1px solid #3d3934;flex-wrap:wrap;justify-content:flex-end;display:flex}.profile-tool{color:#d5d9df;background:0 0;border:0;border-left:1px solid #3d3934;border-radius:0;min-height:50px;padding:0 18px;font-weight:700}.profile-tool:hover{background:#35312c}.muted-tool{color:var(--muted)}.profile-edit-form{background:#26231f;border-bottom:1px solid #3d3934;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;padding:22px;display:grid}.profile-edit-form h2{color:#d7dce4;grid-column:1/-1;font-size:24px}.profile-edit-form label{color:var(--muted);gap:6px;font-weight:800;display:grid}.profile-edit-form input{width:100%}.profile-edit-actions{grid-column:1/-1;align-items:center;gap:10px;display:flex}.profile-edit-form p{color:var(--gold);grid-column:1/-1}.profile-content-grid{grid-template-columns:minmax(0,1fr) 360px;min-height:500px;display:grid}.profile-chart{border-right:1px solid #3d3934;padding:10px;position:relative}.all-filter{color:#cbd2dc;background:0 0;border-color:#45413c;width:62px;height:44px;padding:0}.chart-lines{color:#7f858c;text-align:right;display:grid;position:absolute;inset:70px 24px 72px 10px}.chart-lines span{border-top:1px solid #3d3934;padding-top:6px}.chart-point{background:#57b8ef;border-radius:999px;width:12px;height:12px;position:absolute;top:52%;left:50%}.chart-range{background:#3695ed;height:14px;position:absolute;bottom:42px;left:36px;right:56px}.chart-range i{background:#f3f5f7;border-radius:5px;width:12px;height:30px;position:absolute;top:-7px;box-shadow:0 0 8px #fff6}.chart-range i:first-child{left:0}.chart-range i:last-child{right:0}.profile-info-panel{color:#d7dce4;align-content:start;gap:12px;padding:24px 20px;font-size:18px;line-height:1.3;display:grid}.blue-info{color:#2e9bff}.profile-info-panel button{justify-self:start;margin-top:12px}.hero,.panel,.auth-card,.board-panel{background:linear-gradient(180deg, #ffffff09, #ffffff04), var(--panel);border:1px solid var(--line);border-radius:8px;padding:22px}.hero{background-image:linear-gradient(135deg,#101925,#201f18);align-content:end;min-height:210px;display:grid;position:relative;overflow:hidden}.hero-copy{z-index:1;position:relative}.hero-video{display:none}.hero p,.panel p,.auth-card p{color:var(--muted);line-height:1.55}.hero h1{max-width:740px;font-size:clamp(34px,7vw,72px);line-height:.95}.page-grid{gap:18px;display:grid}.training-hero h1{font-size:38px}.training-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}.training-card{border:1px solid var(--line);background:var(--panel);border-radius:8px;align-content:start;gap:12px;min-height:190px;padding:22px;display:grid}.training-card p{color:var(--muted);line-height:1.55}.training-card .account-link,.training-card button{justify-self:start;margin-top:12px}.endgame-grid .training-card strong{color:var(--gold)}.endgame-section h2{margin-bottom:14px}.endgame-section .training-card h3{font-size:20px}.generated-tasks h2{margin-bottom:14px}.task-header{justify-content:space-between;align-items:start;gap:18px;display:flex}.task-header p{color:var(--muted);line-height:1.55}.task-section+.task-section{margin-top:22px}.generated-task-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;display:grid}.generated-task{border:1px solid var(--line);border-left:4px solid var(--gold);background:#0d131d;border-radius:8px;align-content:start;gap:8px;padding:16px;display:grid}.generated-task.ai-task{border-left-color:#9bc53d}.generated-task.blunder{border-left-color:#ff6767}.generated-task.inaccuracy{border-left-color:#58b9ff}.generated-task span{overflow-wrap:anywhere;border:1px solid var(--line);border-radius:999px;justify-self:start;max-width:100%;padding:5px 9px;font-size:13px;font-weight:800}.generated-task p{color:var(--muted)}.generated-task .account-link{justify-self:start;margin-top:6px}.puzzle-panel{align-content:start}.puzzle-panel p{overflow-wrap:anywhere}.puzzle-layout{grid-template-columns:minmax(220px,300px) minmax(320px,560px) minmax(280px,360px);align-items:start;gap:18px;display:grid}.puzzle-sidebar{gap:14px;display:grid}.puzzle-card,.puzzle-play-panel{background:#24211f;border:1px solid #ffffff0f;border-radius:8px;padding:18px;box-shadow:0 8px 18px #0000002e}.puzzle-card p,.puzzle-play-panel p{color:#d0d3d6;overflow-wrap:anywhere}.puzzle-info-card{grid-template-columns:56px 1fr;align-items:center;gap:14px;display:grid}.puzzle-info-card p{margin:2px 0}.puzzle-info-card strong{color:#4aa3ff}.puzzle-icon{color:#9ca0a6;place-items:center;width:54px;height:54px;font-size:46px;font-weight:900;display:grid}.puzzle-rating-card span{color:#d7dce2;font-size:18px;display:block}.puzzle-rating-card strong{color:#d0d0d0;text-align:center;margin-top:10px;font-size:clamp(54px,7vw,76px);line-height:1;display:block}.puzzle-card h2{margin:0 0 14px;font-size:24px}.puzzle-badge{border:1px solid var(--line);width:fit-content;color:var(--gold);border-radius:999px;padding:5px 9px;font-weight:800;display:inline-flex}.puzzle-board-area{width:100%;min-width:0}.board-wrap.puzzle-board-wrap{max-width:560px}.puzzle-play-panel{gap:18px;min-width:0;display:grid}.puzzle-move-list{border-bottom:1px solid #ffffff14;gap:8px;padding-bottom:14px;display:grid}.puzzle-move-list div{grid-template-columns:84px 1fr;gap:10px;display:grid}.puzzle-move-list span{color:#73777d}.puzzle-move-list strong{color:#c4c7cc;overflow-wrap:anywhere;font-weight:700}.puzzle-turn-card{grid-template-columns:74px 1fr;align-items:center;gap:14px;display:grid}.puzzle-turn-card h1{color:#d9d9d9;margin:0 0 4px;font-size:30px}.puzzle-king{color:#fff;text-shadow:0 2px #000;font-size:62px;line-height:1}.puzzle-action-links{justify-items:center;gap:8px;display:grid}.puzzle-action-links button{color:#3fa2ff;text-transform:uppercase;background:0 0;border:0;padding:8px}.puzzle-action-links button:hover{background:#3fa2ff14}.puzzle-actions{flex-wrap:wrap;gap:10px;display:flex}.auth-heading{margin-top:18px;font-size:22px}.coach-form{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-top:16px;display:grid}.coach-form input{grid-column:span 2;min-width:0}.coach-form textarea{resize:vertical;grid-column:1/-1;min-height:150px}.manual-game{margin-top:14px}.tournament-form button[type=submit]{justify-self:start}.move-sheet{grid-column:1/-1;gap:8px;display:grid}.move-sheet-head,.move-row{grid-template-columns:44px 1fr 1fr;align-items:center;gap:8px;display:grid}.move-sheet-head{color:var(--muted);font-size:13px;font-weight:800}.move-row span{color:var(--muted);font-weight:800}.move-row input{grid-column:span 1}.oauth-buttons{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:18px;display:grid}.google-button{color:#111827;background:#f8fafc;justify-content:center;align-items:center;gap:10px;width:100%;display:flex}.google-button span{color:#4285f4;background:#fff;border-radius:999px;place-items:center;width:22px;height:22px;font-weight:900;display:grid}.lichess-button{color:#11170b;background:#9bc53d;justify-content:center;align-items:center;gap:10px;width:100%;display:flex}.lichess-button span{font-size:24px;line-height:1}.chesscom-button{color:#10160d;background:#7fa650;justify-content:center;align-items:center;gap:10px;width:100%;display:flex}.chesscom-button span{font-size:23px;line-height:1}.auth-divider{color:var(--muted);align-items:center;gap:12px;margin-top:16px;font-size:13px;display:flex}.auth-divider:before,.auth-divider:after{content:"";background:var(--line);flex:1;height:1px}.message{color:var(--gold);margin-top:12px}.warning{border-color:var(--red)}.stats{grid-template-columns:repeat(6,minmax(0,1fr));gap:12px;display:grid}.stat{background:var(--panel-2);border:1px solid var(--line);border-radius:8px;padding:16px}.stat span{color:var(--muted);font-size:13px;display:block}.stat strong{margin-top:8px;font-size:24px;display:block}.chips{flex-wrap:wrap;gap:10px;margin-top:14px;list-style:none;display:flex}.chips li{border:1px solid var(--line);color:var(--green);border-radius:999px;padding:8px 12px}.advice-list{gap:10px;margin-top:14px;list-style:none;display:grid}.advice-list li{border:1px solid var(--line);border-left:4px solid var(--gold);color:var(--ink);background:#ffffff09;border-radius:8px;padding:12px 14px;line-height:1.45}.game-list,.table{gap:10px;margin-top:14px;display:grid}.game-row,.table-row{border:1px solid var(--line);background:#0d131d;border-radius:8px;justify-content:space-between;align-items:center;gap:12px;padding:13px;display:flex}.game-link{flex:1;grid-template-columns:1fr auto;align-items:center;gap:10px;min-width:0;display:grid}.game-link span,.game-link small{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.game-link small{color:var(--muted)}.history-search{width:100%;margin:14px 0 4px}.close-button{width:28px;height:28px;color:var(--muted);background:0 0;border-radius:6px;padding:0}.close-button:hover{background:var(--panel-2);color:var(--ink)}.table-row{grid-template-columns:1fr auto auto auto auto auto;display:grid}.table-row button{padding:9px 12px}.pinned-opening{border-color:var(--gold);background:#151923}.opening-library-title{margin:28px 0 12px}.opening-trainer{grid-template-columns:minmax(220px,1fr) minmax(300px,520px) minmax(220px,1fr);align-items:start;gap:18px;margin-top:18px;display:grid}.opening-study-card,.opening-board-panel{border:1px solid var(--line);background:#151b25;border-radius:8px;padding:18px}.opening-study-card h2{margin-bottom:6px}.opening-study-card h3{color:var(--gold);margin-bottom:12px}.opening-study-card p{color:var(--muted);overflow-wrap:anywhere}.opening-study-actions{flex-wrap:wrap;gap:10px;display:flex}.opening-result{gap:8px;display:grid}.opening-result strong{font-size:20px}.analysis-layout{grid-template-columns:minmax(280px,540px) 1fr;align-items:start;gap:18px;display:grid}.board-panel{overflow:hidden}.board-wrap{width:100%;max-width:520px;margin:0 auto;overflow:hidden}.eval-chip{border:1px solid var(--line);background:#0d131d;border-radius:8px;justify-content:space-between;align-items:center;gap:12px;margin-top:10px;padding:10px 12px;display:flex}.eval-chip span{color:var(--muted);font-size:13px;font-weight:800}.eval-chip strong{color:var(--gold);font-size:20px}.piece-symbol{-webkit-user-select:none;user-select:none;place-items:center;line-height:1;display:grid}.piece-alpha{text-shadow:0 2px 2px #00000052;font-family:Georgia,Times New Roman,serif;font-weight:900}.piece-neo{filter:drop-shadow(0 3px 2px #00000057);font-family:Inter,Segoe UI Symbol,sans-serif;font-weight:900}.piece-white.piece-alpha{color:#fff5d5;-webkit-text-stroke:1px #7b5f20}.piece-black.piece-alpha{color:#1d2430;-webkit-text-stroke:1px #f1d98a}.piece-white.piece-neo{color:#f8fff7;-webkit-text-stroke:1px #3d7b2c}.piece-black.piece-neo{color:#111814;-webkit-text-stroke:1px #9bcf69}.move-table{border:1px solid var(--line);background:#1a1d22;border-radius:8px;margin:16px 0;overflow:hidden}.move-table-head{color:var(--muted);background:#242628;grid-template-columns:70px 1fr;align-items:center;gap:12px;padding:10px 14px;display:grid}.move-table-head strong{color:var(--ink);font-size:28px}.move-pair{border-top:1px solid #ffffff0d;grid-template-columns:42px minmax(0,1fr) 60px minmax(0,1fr) 60px;align-items:center;display:grid}.move-number{color:#777f8a;text-align:center}.move-cell{color:#d7dce4;text-align:left;background:0 0;border:0;border-radius:0;width:100%;min-height:40px;padding:8px 12px;font-size:22px;font-weight:700}.move-cell:hover,.move-cell.selected{color:#fff;background:#29313d}.move-cell.inaccuracy{color:#58b9ff}.move-cell.mistake{color:var(--gold)}.move-cell.blunder{color:#ff6767}.move-eval{color:#9299a3;text-align:right;padding-right:14px;font-size:16px}.move-empty{color:#777f8a;padding:8px 12px;font-size:22px}.move-note{color:#d7dce4;text-align:left;background:#2b2a27;border:0;border-top:1px solid #ffffff14;border-radius:0;grid-column:1/-1;width:100%;padding:9px 14px;font-size:18px;font-weight:700}.move-note.inaccuracy{color:#58b9ff}.move-note.mistake{color:var(--gold)}.move-note.blunder{color:#ff6767}.critical{border-left:3px solid var(--gold);padding-left:14px}.coach-panel{gap:16px;min-height:520px;display:grid}.chat-window{gap:12px;max-height:56vh;padding-right:4px;display:grid;overflow:auto}.chat-message{border:1px solid var(--line);background:#0d131d;border-radius:8px;max-width:78%;padding:12px 14px}.chat-message span{color:var(--muted);align-items:center;gap:8px;margin-bottom:6px;font-size:12px;display:flex}.chat-message p{color:var(--ink);white-space:pre-wrap}.chat-message.user{background:#201f18;border-color:#5a4724;justify-self:end}.speak-button{border-radius:8px;width:28px;min-height:28px;padding:0;font-size:14px;line-height:1}.chat-form{grid-template-columns:1fr auto;align-self:end;gap:10px;display:grid}.auth-card{max-width:520px;margin:12vh auto 0}.onboarding-form label{color:var(--muted);grid-column:span 2;gap:6px;font-weight:800;display:grid}.onboarding-form label input,.onboarding-form label select{width:100%}.onboarding-form button{justify-self:start}.pricing-page{gap:18px;display:grid}.pricing-header{justify-content:space-between;align-items:end;gap:18px;padding:28px 0 8px;display:flex}.pricing-header p{color:var(--muted);line-height:1.5}.pricing-header h1{margin-top:4px;font-size:52px;line-height:1}.billing-tools{align-items:stretch;gap:12px;display:flex}.credit-status{border:1px solid var(--line);background:var(--panel);border-radius:8px;gap:6px;min-width:150px;padding:14px 16px;display:grid}.credit-status span{color:var(--muted);text-transform:uppercase;font-size:13px;font-weight:800}.credit-status strong{font-size:28px}.credit-limit-notice{background:#e06d6714;border:1px solid #e06d676b;border-radius:8px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-top:14px;padding:14px;display:flex}.credit-limit-notice p{color:var(--ink);font-weight:800}.credit-limit-notice .account-link{margin:0}.promo-card{border:1px solid var(--line);background:var(--panel);border-radius:8px;gap:8px;width:min(330px,42vw);padding:14px 16px;display:grid}.promo-card span{color:var(--muted);text-transform:uppercase;font-size:13px;font-weight:800}.promo-row{grid-template-columns:minmax(110px,1fr) auto;gap:8px;display:grid}.promo-row input{text-transform:uppercase;min-width:0;height:40px;padding:0 12px}.promo-row button{white-space:nowrap;min-height:40px;padding:0 12px}.promo-card p{color:var(--gold);font-size:13px;line-height:1.3}.pricing-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;display:grid}.pricing-card{border:1px solid var(--line);background:#0e141d;border-radius:8px;align-content:space-between;justify-items:center;gap:22px;min-height:430px;padding:32px 18px;display:grid;position:relative}.pricing-card.highlighted{border-color:#dc2f7f;box-shadow:0 0 0 1px #dc2f7f3d}.best-badge{color:#fff;text-transform:uppercase;white-space:nowrap;background:#dc2f7f;border-radius:8px;padding:9px 16px;font-size:14px;font-weight:900;position:absolute;top:-21px;left:50%;transform:translate(-50%)}.plan-pill{background:var(--panel-2);color:var(--ink);text-transform:uppercase;border-radius:999px;padding:10px 18px;font-weight:900}.highlighted .plan-pill{background:#c3288e}.plan-icon{color:#687280;background:#151c28;border-radius:50%;place-items:center;width:96px;height:96px;font-size:54px;line-height:1;display:grid}.highlighted .plan-icon{color:#ff6b54;background:#dc2f7f29}.price-line{border-top:1px solid var(--line);justify-items:center;width:100%;padding-top:34px;display:grid}.price-line span{color:var(--muted);font-size:18px}.price-line strong{color:var(--ink);font-size:56px;line-height:1}.pricing-card button{width:100%;min-height:52px}.highlighted button{color:#fff;background:linear-gradient(135deg,#ff6b1a,#df2aa1)}.pricing-footer{color:var(--muted);justify-content:center;align-items:center;gap:12px;display:flex}.pricing-footer span{color:var(--gold)}.success-note{border-color:var(--green)}.interface-student{--bg:#07090c;--panel:#0d1116;--panel-2:#141922;--ink:#f6f1e8;--muted:#aaa59d;--gold:#e88722;--green:#d49a45;--line:#ffffff1a;width:min(1420px,100%);min-height:100vh}.interface-student:before{content:"";z-index:-1;background:radial-gradient(circle at 78% 5%,#e8872224,#0000 26%),linear-gradient(#090b0f 0%,#050608 100%);position:fixed;inset:0}.interface-student .topbar{min-height:70px;margin-bottom:18px}.interface-student .brand{color:#fff7ea;text-transform:uppercase;font-size:28px}.interface-student .brand-mark{background:#090b0f;width:50px;height:50px}.interface-student .nav{gap:12px}.interface-student .nav a{color:#e8e0d4;border:1px solid #0000;border-radius:8px;align-items:center;gap:8px;min-height:48px;padding:0 16px;font-size:18px;font-weight:900;display:inline-flex}.interface-student .nav a:first-child:before{content:"🏠"}.interface-student .nav a:nth-child(2):before{content:"⚔️"}.interface-student .nav a:nth-child(3):before{content:"🎯"}.interface-student .nav a:nth-child(4):before{content:"♔"}.interface-student .nav a:nth-child(5):before{content:"🤖"}.interface-student .nav a:nth-child(6):before{content:"⭐"}.interface-student .nav a.active{color:#ffd19a;background:linear-gradient(#22262d,#11151b);border-color:#ffffff14;box-shadow:0 12px 28px #00000047}.interface-student .profile-link,.interface-student .lang-select{background:#171b22;border-color:#ffffff24;min-width:50px;height:50px}.interface-student .hero{background:url(/teen-hero-banner.jpg) 50%/cover no-repeat;border-color:#ffffff1f;align-content:end;min-height:318px;padding:0;box-shadow:inset 0 0 52px #0000005c}.interface-student .hero-copy{display:none}.interface-student .hero p{color:#f1c27a;font-size:19px;font-weight:900}.interface-student .hero h1{color:#f8f1e7;text-transform:uppercase;text-shadow:0 4px 18px #000000b8;max-width:460px;font-size:clamp(38px,4.1vw,56px);line-height:1.05}.interface-student .panel,.interface-student .auth-card,.interface-student .board-panel{background:#0c0f14eb;border-color:#ffffff1a;box-shadow:0 18px 42px #00000047}.interface-student .panel h2:before{content:"🎮 "}.interface-student button,.interface-student .account-link{color:#160d05;background:linear-gradient(135deg,#f7a438,#d96a14);border-color:#ffb24e5c;min-height:54px;box-shadow:0 12px 26px #d96a143d}.interface-student input,.interface-student select{background:#040609bd;border-color:#ffffff1f;min-height:54px}.interface-student .stat,.interface-student .game-row,.interface-student .table-row,.interface-student .generated-task{background:#0a0d11e6;border-color:#ffffff14}.interface-student .chips li,.interface-student .puzzle-badge{color:#f0a34b;background:#e887221a}.interface-preschool{--bg:#07091a;--panel:#11132b;--panel-2:#191642;--ink:#fff9ef;--muted:#d6cdf2;--gold:#ffd447;--green:#83e7bf;--line:#9f76ff47;width:min(1420px,100%);min-height:100vh}.interface-preschool:before{content:"";z-index:-1;background:radial-gradient(circle at 75% 8%,#944dff59,#0000 28%),radial-gradient(circle at 20% 95%,#ffd4471f,#0000 24%),linear-gradient(#090b21 0%,#07091a 58%,#050613 100%);position:fixed;inset:0}.interface-preschool .topbar{min-height:72px;margin-bottom:26px}.interface-preschool .brand{text-transform:uppercase;font-size:28px}.interface-preschool .brand-mark{background:linear-gradient(135deg,#ffd447,#ff9f3d);border-radius:50%;width:52px;height:52px;box-shadow:0 8px 24px #ffd44740}.interface-preschool .nav{gap:14px}.interface-preschool .nav a{color:#f7f0ff;border-radius:8px;align-items:center;gap:9px;min-height:52px;padding:0 18px;font-size:18px;font-weight:900;display:inline-flex}.interface-preschool .nav a:first-child:before{content:"🏠"}.interface-preschool .nav a:nth-child(2):before{content:"🚀"}.interface-preschool .nav a:nth-child(3):before{content:"🎯"}.interface-preschool .nav a:nth-child(4):before{content:"♔"}.interface-preschool .nav a:nth-child(5):before{content:"🤖"}.interface-preschool .nav a:nth-child(6):before{content:"⭐"}.interface-preschool .nav a.active{background:linear-gradient(135deg,#ff75dc,#6f3bd7);box-shadow:0 10px 26px #6f3bd75c}.interface-preschool .profile-link,.interface-preschool .lang-select{background:linear-gradient(135deg,#6f3bd7,#371877);border-color:#ffffff29;min-width:52px;height:52px;box-shadow:0 10px 24px #6f3bd740}.interface-preschool .hero{background:linear-gradient(90deg,#090b21f5 0%,#090b21d1 42%,#090b217a 100%),#07091a;border-color:#a57eff5c;border-radius:8px;align-content:center;min-height:300px;padding:44px;box-shadow:inset 0 0 48px #944dff29}.interface-preschool .hero-video{object-fit:cover;width:100%;height:100%;display:block;position:absolute;inset:0}.interface-preschool .hero-copy{gap:16px;max-width:520px;display:grid}.interface-preschool .hero h1{color:#fff;text-shadow:0 4px 18px #0000006b;max-width:460px;font-size:clamp(42px,5vw,64px);line-height:1.12}.interface-preschool .hero h1:after{content:" 🏆";color:var(--gold)}.interface-preschool .hero p{color:#fff;max-width:420px;font-size:22px;font-weight:800}.interface-preschool .panel,.interface-preschool .auth-card,.interface-preschool .board-panel{background:linear-gradient(#1f1c4ceb,#0d0f26f5);border-color:#a57eff52;box-shadow:0 18px 42px #00000042}.interface-preschool .panel h2:before{content:"🎮 "}.interface-preschool button,.interface-preschool .account-link{color:#17120a;background:linear-gradient(135deg,#ffe96b,#ffc32d);border-color:#ffffff38;min-height:54px;box-shadow:0 10px 24px #ffc32d3d}.interface-preschool input,.interface-preschool select{background:#050716a8;border-color:#a57eff52;min-height:54px}.interface-preschool .stat,.interface-preschool .game-row,.interface-preschool .table-row,.interface-preschool .generated-task{background:#0c0e24db;border-color:#a57eff3d}.interface-preschool .chips li,.interface-preschool .puzzle-badge{color:#ffdf5c;background:#ffd4471f}@media (width<=820px){.topbar,.game-row{flex-direction:column;align-items:flex-start}.profile-popover{width:min(340px,100vw - 40px);left:0;right:auto}.settings-row{font-size:17px}.stats{grid-template-columns:repeat(2,minmax(0,1fr))}.coach-form,.chat-form,.analysis-layout,.puzzle-layout,.opening-trainer,.table-row,.oauth-buttons,.lichess-profile,.profile-content-grid,.training-grid,.generated-task-grid,.pricing-grid{grid-template-columns:1fr}.pricing-header{flex-direction:column;align-items:stretch}.pricing-header h1{font-size:40px}.billing-tools{flex-direction:column}.promo-card{width:100%}.promo-row{grid-template-columns:1fr}.pricing-card{min-height:360px}.puzzle-board-area{order:1}.puzzle-play-panel{order:2}.puzzle-sidebar{order:3}.puzzle-card,.puzzle-play-panel{padding:14px}.puzzle-info-card,.puzzle-turn-card{grid-template-columns:52px 1fr}.puzzle-icon{width:48px;height:48px;font-size:40px}.puzzle-king{font-size:48px}.puzzle-turn-card h1{font-size:26px}.puzzle-move-list div{grid-template-columns:1fr;gap:3px}.task-header{flex-direction:column}.move-sheet-head,.move-row{grid-template-columns:36px 1fr 1fr}.profile-side,.profile-chart{border-right:0}.profile-actions-bar{justify-content:flex-start}.profile-edit-form{grid-template-columns:1fr}.coach-form input,.onboarding-form label{grid-column:span 1}.interface-student .topbar{gap:14px}.interface-student .brand{font-size:24px}.interface-student .nav a{min-height:44px;padding:0 12px;font-size:16px}.interface-student .hero{background:url(/teen-hero-banner.jpg) 50%/cover no-repeat;min-height:260px;padding:0}.interface-student .hero h1{font-size:36px}.interface-student .hero p{font-size:17px}.interface-preschool .topbar{gap:14px}.interface-preschool .brand{font-size:24px}.interface-preschool .nav a{min-height:46px;padding:0 12px;font-size:16px}.interface-preschool .hero{background:linear-gradient(#090b21f2 0%,#090b21b8 100%),#07091a;align-content:start;min-height:480px;padding:26px}.interface-preschool .hero h1{font-size:38px}.interface-preschool .hero p{font-size:18px}}
