:root{--bg:#101b20;--panel:#18272d;--panel-2:#20323a;--text:#f2f3e9;--muted:#a9b9ba;--line:#31464d;--accent:#b6df6a;--accent-dark:#19301d;--danger:#f4a39a;--light:#dfebd5;--dark:#75938d;--radius:18px;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:var(--bg);font-size:16px}*{box-sizing:border-box}body{margin:0;min-width:320px}button,input{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid var(--accent);outline-offset:3px}[hidden]{display:none!important}.muted{color:var(--muted)}.tiny{font-size:.86rem}.eyebrow{color:var(--accent);text-transform:uppercase;letter-spacing:.15em;font-size:.72rem;font-weight:800;margin:0 0 12px}.topbar{height:74px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:22px;padding:0 max(24px,calc((100vw - 1200px)/2));background:#132127}.brand{display:flex;align-items:center;gap:11px;color:var(--text);text-decoration:none;font-weight:800;white-space:nowrap}.brand-mark{width:52px;height:52px;border-radius:14px;background:var(--accent);display:grid;place-items:center;color:var(--accent-dark);font-size:2rem;line-height:1}.brand-mark.small{width:36px;height:36px;border-radius:10px;font-size:1.5rem}.nav{display:flex;gap:6px;align-self:stretch;align-items:center}.nav-item,.text-button{border:0;background:transparent;color:var(--muted);padding:11px 14px;border-radius:9px}.nav-item:hover,.text-button:hover{color:var(--text);background:var(--panel-2)}.nav-item.active{color:var(--accent);background:#263c32}.container{max-width:1200px;margin:auto;padding:38px 24px 90px}.intro{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:29px}.intro h1{font-size:clamp(2rem,4vw,3.3rem);letter-spacing:-.055em;line-height:1.05;margin:0 0 12px}.intro p:last-child{margin:0}.button{min-height:46px;display:inline-flex;align-items:center;justify-content:center;border-radius:11px;padding:11px 19px;border:1px solid transparent;font-weight:750;text-decoration:none;white-space:nowrap;transition:transform .16s ease,background .16s ease}.button:hover{transform:translateY(-1px)}.button.primary{background:var(--accent);color:var(--accent-dark)}.button.primary:hover{background:#c9ef80}.button.secondary{background:var(--panel-2);border-color:var(--line);color:var(--text)}.upload-button{cursor:pointer}.job-status{background:#293c33;border:1px solid #4d7054;color:#ddf6c7;padding:13px 18px;border-radius:12px;margin-bottom:24px}.practice-layout{display:grid;grid-template-columns:minmax(320px,610px) minmax(280px,1fr);gap:24px;align-items:start}.board-card,.coach-card,.stat,.insight,.game-row{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius)}.board-card{padding:20px}.board-heading,.board-footer{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:32px}.board-heading{margin-bottom:16px}.board-footer{margin-top:12px;font-size:.9rem}.pill{display:inline-flex;align-items:center;border:1px solid #598263;color:#d7efce;background:#263f33;border-radius:100px;padding:6px 11px;font-weight:700;font-size:.78rem}.chessboard{aspect-ratio:1;width:100%;display:grid;grid-template-columns:repeat(8,1fr);overflow:hidden;border-radius:7px;border:2px solid #738b7d;touch-action:manipulation}.square{border:0;border-radius:0;min-width:0;min-height:0;display:grid;place-items:center;position:relative;font-family:"Segoe UI Symbol","Apple Symbols","DejaVu Sans",serif;font-size:clamp(28px,5vw,58px);line-height:1;padding:0;color:#151c19;user-select:none}.square.light{background:var(--light)}.square.dark{background:var(--dark)}.square.white-piece{color:#fbfaf3;text-shadow:0 2px 2px #24302d,1px 0 #24302d,-1px 0 #24302d,0 -1px #24302d}.square.black-piece{color:#17221f;text-shadow:0 1px 1px #e0e8df}.square.selected{box-shadow:inset 0 0 0 5px #d7dd56}.square:hover{filter:brightness(1.13)}.square .coord{position:absolute;font-family:Arial,sans-serif;font-size:10px;font-weight:800;line-height:1;text-shadow:none}.square .file{bottom:3px;right:4px}.square .rank{top:3px;left:4px}.square.light .coord{color:#54756d}.square.dark .coord{color:#e7efe0}.coach-card{padding:28px;min-height:430px}.coach-card h2{font-size:clamp(1.6rem,2.4vw,2.35rem);letter-spacing:-.04em;line-height:1.12;margin:0 0 14px}.coach-card h3{margin:0 0 12px;font-size:.96rem}.coach-card p{line-height:1.55}.coach-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:27px}.divider{height:1px;background:var(--line);margin:30px 0}.feedback{border-radius:12px;padding:16px 18px;margin-top:18px;line-height:1.55;background:#273e32;border:1px solid #517c5c}.feedback.wrong{background:#44302f;border-color:#865651}.feedback strong{display:block;margin-bottom:4px}.feedback a{color:var(--accent)}.theme-filters{display:flex;flex-wrap:wrap;gap:8px}.filter{border:1px solid var(--line);background:var(--panel-2);color:var(--muted);border-radius:100px;padding:8px 12px;font-size:.83rem;min-height:40px}.filter.active{color:var(--accent-dark);background:var(--accent);border-color:var(--accent)}.section-heading{margin:35px 0 18px}.section-heading h2{font-size:1.5rem;margin:0 0 6px}.section-heading p{margin:0}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.stat{padding:23px}.stat strong{display:block;font-size:2rem;letter-spacing:-.05em}.stat span{color:var(--muted);font-size:.9rem}.insight-list,.game-list{display:grid;gap:11px}.insight,.game-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 21px}.insight h3,.game-row h3{margin:0 0 5px;font-size:1rem}.insight p,.game-row p{margin:0;color:var(--muted);font-size:.87rem}.insight .button{min-width:135px}.game-date{white-space:nowrap;color:var(--muted);font-size:.88rem}.game-row a{color:var(--accent)}.empty{padding:40px 24px;border:1px dashed var(--line);border-radius:var(--radius);color:var(--muted);text-align:center}.login-shell{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 20% 20%,#314c36 0,transparent 31%),var(--bg)}.login-card{width:min(100%,450px);background:var(--panel);border:1px solid var(--line);border-radius:24px;padding:40px;box-shadow:0 24px 90px #06101499}.login-card h1{font-size:2.6rem;letter-spacing:-.055em;line-height:1.08;margin:0 0 14px}.login-card form{display:grid;gap:10px;margin-top:28px}.login-card label{font-weight:700}.login-card input{height:49px;border-radius:9px;background:#0e191e;border:1px solid var(--line);color:var(--text);padding:0 14px}.login-card .button{margin-top:8px}.form-error{min-height:1.4em;color:var(--danger)}@media(max-width:850px){.practice-layout{grid-template-columns:1fr}.board-card{max-width:610px;width:100%;margin:auto}.coach-card{min-height:0}.topbar{padding:0 18px}.brand span:last-child{display:none}}@media(max-width:580px){.topbar{height:auto;min-height:64px;flex-wrap:wrap;gap:0;padding:12px 14px 0}.nav{order:3;width:100%;justify-content:space-between;min-height:52px}.nav-item{padding:9px 7px;font-size:.85rem}.container{padding:27px 12px 70px}.intro{align-items:flex-start;flex-direction:column}.intro .button{width:100%}.board-card{padding:10px}.coach-card{padding:22px}.stats{grid-template-columns:1fr 1fr}.stat:last-child{grid-column:span 2}.insight,.game-row{align-items:flex-start;flex-direction:column}.insight .button{width:100%}.square{font-size:clamp(30px,9vw,48px)}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}