@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{color-scheme:dark;--bg:#101211;--panel:#191c19;--muted:#969c93;--green:#c1f36b;--line:#2b3029}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:#f3f5ef;font-family:'DM Sans',sans-serif;font-size:16px}button,a,select{-webkit-tap-highlight-color:transparent}button,select{font:inherit}button{cursor:pointer;color:inherit}button:focus-visible,a:focus-visible,select:focus-visible{outline:2px solid var(--green);outline-offset:5px}button{transition:background .18s,transform .18s}button:hover{filter:brightness(1.13)}.sidebar{position:fixed;inset:0 auto 0 0;width:235px;border-right:1px solid var(--line);padding:40px 24px;display:flex;flex-direction:column;background:#151714}.brand{display:flex;align-items:center;gap:11px;color:#fff;text-decoration:none;font-size:24px;font-weight:800;letter-spacing:-1px}.brand-icon{font-size:45px;color:var(--green);font-weight:400}.brand-dot{color:var(--green)}.brand small{display:block;font-size:9px;letter-spacing:2px;margin-top:5px;color:var(--muted)}.nav-label{font-size:11px;letter-spacing:1.6px;color:#767e72;margin:64px 12px 19px}.nav{width:100%;border:0;background:none;display:flex;align-items:center;text-align:left;gap:15px;padding:16px;border-radius:8px;margin:7px 0;color:#a9b0a3;font-weight:500}.nav span{font-size:23px;width:24px}.nav i{font-style:normal;margin-left:auto}.nav.active{background:var(--green);color:#1b2513}.sidebar-bottom{margin-top:auto}.quote{font-family:Manrope,sans-serif;color:#818a79;font-size:24px;font-weight:500;line-height:1.6;padding:30px 12px}.quote em{color:#d5decf;font-style:normal}.side-footer{border-top:1px solid var(--line);padding-top:24px;display:flex;align-items:center;gap:13px;font-size:13px;color:#a1a999}.side-footer small{display:block;font-size:10px;letter-spacing:2px;margin-top:6px;color:#65705e}.pawn{border:0;background:transparent;font-size:29px;color:#a6b299;padding:0 10px;touch-action:manipulation}main{max-width:1600px;margin-left:235px;padding:0 48px}header{height:96px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:25px}.breadcrumb{font-size:14px;color:var(--muted)}.breadcrumb span{margin:0 15px;color:#4b5346}.breadcrumb strong{color:#ecefe8;font-weight:500}.edition{margin-left:auto;font-size:10px;letter-spacing:1.9px;color:#838a7c}.avatar{border:1px solid #3b4433;background:#242c1e;color:#cfdfba;border-radius:50%;width:38px;height:38px;font-size:11px}.heading{display:flex;align-items:center;justify-content:space-between;margin:36px 0 28px}.eyebrow{font-size:10px;letter-spacing:2px;color:#b3c0a5;display:flex;gap:8px;align-items:center}.eyebrow span{width:5px;height:5px;background:var(--green);border-radius:50%}h1{font-family:Manrope,sans-serif;font-size:clamp(30px,3vw,46px);font-weight:500;letter-spacing:-1.9px;line-height:1.2;margin:13px 0 12px}h1 em{font-style:normal;color:var(--green)}.heading p{margin:0;color:var(--muted);font-size:14px}.heading-mark{font-size:65px;color:#586349;transform:rotate(12deg);margin-right:10px}.game-layout{display:grid;grid-template-columns:minmax(320px,1.25fr) minmax(290px,.9fr);gap:32px;align-items:start}.board-panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px 20px 0;overflow:hidden}.player{display:flex;align-items:center;gap:11px;margin-bottom:18px}.player-icon{height:37px;width:37px;display:grid;place-items:center;border-radius:7px;font-size:29px}.dark-piece{background:#343b2d;color:#121710}.light-piece{background:#deded1;color:#2b3025}.player strong{font-size:13px;font-weight:500;display:block}.player small{font-size:11px;color:var(--muted);display:block;margin-top:3px}.player-tag{margin-left:auto;color:#a5b399;border:1px solid #3b4532;border-radius:4px;padding:5px 8px;font-size:9px;letter-spacing:1.3px}.board-wrap{position:relative;padding-left:16px;padding-bottom:19px}.board{display:grid;grid-template-columns:repeat(8,1fr);aspect-ratio:1;border-radius:3px;overflow:hidden}.square{display:flex;align-items:center;justify-content:center;position:relative;background:#d5dac7;aspect-ratio:1}.square.dark{background:#78925d}.square.last{background:#d2de69}.piece{font-family:'Arial Unicode MS','DejaVu Sans',serif;font-size:clamp(25px,3.5vw,57px);line-height:1;color:#252d21;filter:drop-shadow(0 2px 1px #0003)}.piece.white{color:#fffdf0;-webkit-text-stroke:1px #343d2e}.ranks{position:absolute;left:-3px;top:0;bottom:19px;display:grid;grid-template-rows:repeat(8,1fr);font-size:10px;color:#9da991}.ranks span{align-self:center}.files{position:absolute;bottom:0;left:16px;right:0;display:grid;grid-template-columns:repeat(8,1fr);text-align:center;font-size:10px;color:#9da991}.bottom-player{margin:15px 0}.piece-capture{margin-left:auto;font-size:11px;letter-spacing:1px;color:#a6b298}.board-toolbar{border-top:1px solid var(--line);margin:0 -20px;padding:10px 18px;display:flex;align-items:center;justify-content:space-between;font-size:12px;color:#a5af9c}.board-toolbar>div{display:flex;align-items:center;gap:5px}.board-toolbar button{border:0;background:none;color:#c4ccb9;font-size:24px;padding:0 8px}.divider{height:17px;width:1px;background:var(--line);margin:0 5px}.play-panel{padding:22px 0 0 0}.panel-kicker,.small-label{font-size:10px;letter-spacing:1.8px;color:#a3af96}.panel-kicker{color:var(--green)}h2{font-family:Manrope,sans-serif;font-size:32px;line-height:1.22;font-weight:500;letter-spacing:-1.3px;margin:12px 0}h2>span{color:var(--green)}.play-panel>p{font-size:14px;color:var(--muted);margin:0 0 28px}.mode-tabs{display:flex;background:#1d211a;border:1px solid var(--line);border-radius:8px;padding:5px;margin-bottom:25px}.mode-tabs button{width:50%;border:0;background:none;color:#9da894;padding:12px 2px;font-size:12px;border-radius:5px}.mode-tabs .selected{background:#343d2c;color:#ecf4e3}.field-label{font-size:10px;color:#9da894;letter-spacing:1.6px}.time-options{display:flex;gap:10px;margin:12px 0 22px}.time-options button{border:1px solid var(--line);background:#191d17;border-radius:8px;flex:1;padding:15px 5px;display:flex;align-items:center;flex-direction:column}.time-options button>span{font-size:25px;color:#9ca990;margin-bottom:9px}.time-options strong{font-size:18px;font-weight:500}.time-options small{font-size:11px;color:#95a086;margin-top:5px}.time-options .selected{border-color:#b7e565;background:#252e1d}.time-options .selected>span{color:var(--green)}.level-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;gap:10px;font-size:12px;color:#a6b09c}select{background:transparent;border:0;color:#eef0e8;font-size:12px;padding:5px;max-width:150px}select option{background:#242b20}.primary{background:var(--green);color:#182311;border:0;border-radius:7px;padding:17px 20px;width:100%;font-weight:700;font-size:15px;display:flex;justify-content:space-between}.primary span{font-size:20px;line-height:1}.panel-footnote{font-size:11px;color:#77816d;text-align:center;margin-top:13px}.panel-rule{height:1px;background:var(--line);margin:29px 0 25px}.daily{display:flex;gap:16px;align-items:center}.daily-icon{font-size:48px;color:#b9c4a8;background:#20271b;border-radius:10px;padding:6px 10px}.daily h3{font-size:14px;font-weight:500;margin:8px 0}.daily button{border:0;background:none;padding:0;color:var(--green);font-size:12px}.daily button span{margin-left:9px}.lower{display:grid;grid-template-columns:1.25fr .9fr;gap:32px;margin-top:27px}.lesson-card{display:flex;justify-content:space-between;align-items:center;text-align:left;border:1px solid #38422c;border-radius:10px;background:linear-gradient(120deg,#252e1e,#1c2219);padding:24px 27px;overflow:hidden}.lesson-card h3{font-size:21px;line-height:1.35;font-weight:500;margin:12px 0 15px;letter-spacing:-.6px}.lesson-link{font-size:11px;color:#c4dea5}.lesson-link>span{margin-left:15px}.lesson-piece{font-size:117px;color:#b4c998;transform:rotate(-12deg);margin-right:10px;text-shadow:5px 8px 0 #111a0c}.thought{padding:26px 0}.thought p{font-family:Manrope,sans-serif;font-size:22px;font-weight:400;line-height:1.5;letter-spacing:-.7px;color:#d2d9ca;margin:13px 0}.thought-caption{font-size:11px;color:#7c8872}footer{padding:26px 0;display:flex;justify-content:space-between;font-size:10px;color:#697360;letter-spacing:.3px}dialog{background:#1b2118;color:#f1f4ec;border:1px solid #48533e;border-radius:15px;padding:38px;max-width:440px;width:calc(100% - 32px);box-shadow:0 30px 120px #0009}dialog::backdrop{background:#070a07bf;backdrop-filter:blur(7px)}dialog h2{margin-top:10px}dialog p{color:#b4bea9;font-size:15px;line-height:1.75}dialog .close{position:absolute;right:13px;top:8px;font-size:26px;background:none;border:0;color:#9ba88e}dialog .modal-icon{font-size:45px;color:var(--green)}dialog .primary{margin-top:22px}dialog .badge{display:inline-block;padding:7px 11px;border:1px solid #465539;border-radius:5px;color:#c7d8b6;font-size:12px}dialog ol{color:#b4bea9;line-height:1.9;padding-left:22px}dialog .choice{width:100%;background:#2a3421;border:1px solid #536743;border-radius:5px;padding:12px;margin:5px 0;text-align:left}#feedback{color:var(--green)}@media(min-width:1500px){main{padding:0 70px}.game-layout{grid-template-columns:minmax(440px,660px) minmax(300px,420px)}.piece{font-size:62px}}@media(max-width:1150px){.sidebar{width:195px;padding:30px 16px}.brand{font-size:20px}.brand small{font-size:8px;letter-spacing:1px}main{margin-left:195px;padding:0 28px}.game-layout{gap:24px;grid-template-columns:minmax(290px,1.1fr) minmax(250px,.9fr)}.edition{display:none}h2{font-size:28px}.play-panel{padding-top:10px}.time-options{gap:6px}.lower{gap:24px}.lesson-card{padding:20px}.lesson-piece{font-size:88px}.thought p{font-size:20px}}@media(max-width:900px){.sidebar{width:85px;align-items:center;padding:25px 12px}.brand>span:last-child,.nav-label,.nav i,.quote,.side-footer>span{display:none}.nav{font-size:0;gap:0;padding:14px 16px}.nav span{font-size:25px}nav{margin-top:42px}.side-footer{padding-top:18px}.sidebar-bottom{width:100%}main{margin-left:85px;padding:0 24px}.game-layout{grid-template-columns:minmax(270px,1.1fr) minmax(240px,.9fr);gap:22px}.piece{font-size:clamp(29px,4.4vw,44px)}h1{font-size:34px}.heading-mark{display:none}.lower{grid-template-columns:1fr}.thought{display:none}.player-tag{display:none}.board-panel{padding:14px 12px 0}.board-toolbar{margin:0 -12px;padding:10px}.board-toolbar>span{font-size:10px}.play-panel>p{margin-bottom:20px}.mode-tabs{margin-bottom:19px}}@media(max-width:680px){.sidebar{position:relative;width:100%;height:76px;flex-direction:row;justify-content:space-between;padding:12px 20px;border-right:0;border-bottom:1px solid var(--line)}.brand>span:last-child{display:block}.brand-icon{font-size:37px}.brand small{display:none}nav{display:flex;margin:0;gap:4px}.nav{margin:0;padding:8px 12px}.nav span{font-size:24px}.sidebar-bottom{margin:0;width:auto}.side-footer{border:0;padding:0}.pawn{font-size:25px;padding:5px}.brand{font-size:18px;gap:6px}main{margin:0;padding:0 20px}header{height:58px}.avatar{height:31px;width:31px;margin-left:auto}.heading{margin:27px 0 23px}h1{font-size:32px;letter-spacing:-1.3px}.eyebrow{font-size:9px}.game-layout{grid-template-columns:1fr;gap:28px}.board-panel{padding:16px 17px 0}.board-toolbar{margin:0 -17px;padding:10px 16px}.board-toolbar>span{font-size:12px}.piece{font-size:clamp(30px,8vw,54px)}.player-tag{display:block}.play-panel{padding:0 3px}.play-panel h2{font-size:30px}.mode-tabs button{font-size:14px}.field-label,.small-label{font-size:11px}.level-row,select{font-size:14px}.time-options small{font-size:12px}.daily h3{font-size:16px}.daily button{font-size:14px}.lower{margin-top:27px}.lesson-piece{font-size:100px}footer{font-size:9px;gap:15px}.quote{display:none}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}@media(min-width:681px){.nav,.mode-tabs button,.level-row,select,.board-toolbar,.daily button,.lesson-link{font-size:14px}.player strong{font-size:14px}.player small,.time-options small,.panel-footnote{font-size:12px}}