:root{--bg: #f3f0ea;--panel: #fffdf8;--panel-2: #ebe5db;--text: #1f2933;--muted: #667085;--border: #d4c9ba;--primary: #245b3d;--primary-contrast: #ffffff;--danger: #a13232;--success: #1d6b43;--shadow: 0 16px 35px rgba(31, 41, 51, .08);--sidebar-width: 288px;--light-square: #f0d9b5;--dark-square: #b58863}:root[data-theme=dark]{--bg: #111827;--panel: #1f2937;--panel-2: #111827;--text: #f9fafb;--muted: #a7b0bd;--border: #374151;--primary: #82c69d;--primary-contrast: #0b1117;--danger: #ff8787;--success: #8fe3b0;--shadow: 0 16px 35px rgba(0, 0, 0, .25)}*{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:radial-gradient(circle at top left,color-mix(in srgb,var(--primary) 12%,transparent),transparent 35%),var(--bg);color:var(--text)}button,input,textarea,select{font:inherit}button,select,input,textarea{border-radius:12px;border:1px solid var(--border);background:var(--panel);color:var(--text)}button{cursor:pointer;padding:.65rem .9rem;transition:transform .12s ease,border-color .12s ease,background .12s ease}button:hover:not(:disabled){transform:translateY(-1px);border-color:var(--primary)}button:disabled{cursor:not-allowed;opacity:.5}button.primary,.primary{background:var(--primary);color:var(--primary-contrast);border-color:var(--primary)}button.danger{color:var(--danger)}button.active{border-color:var(--primary);background:color-mix(in srgb,var(--primary) 10%,var(--panel));box-shadow:inset 0 0 0 1px var(--primary)}input,textarea,select{width:100%;padding:.75rem}textarea{resize:vertical}label{display:grid;gap:.4rem;font-weight:650}table{border-collapse:collapse;width:100%;font-size:.94rem}th,td{border-bottom:1px solid var(--border);text-align:left;padding:.7rem;vertical-align:top}th{color:var(--muted);font-weight:700}tr.clickable{cursor:pointer}tr.clickable:hover{background:var(--panel-2)}.auth-shell{min-height:100vh;display:grid;place-items:center;padding:20px}.auth-card{width:min(460px,100%)}.layout-shell{min-height:100vh;display:grid;grid-template-columns:var(--sidebar-width) 1fr}.app-sidebar{position:sticky;top:0;height:100vh;display:grid;grid-template-rows:auto 1fr auto;gap:1rem;padding:1.1rem;border-right:1px solid var(--border);background:color-mix(in srgb,var(--panel) 96%,transparent);box-shadow:var(--shadow);z-index:20}.sidebar-brand h1{margin:0;font-size:1.45rem}.sidebar-nav,.sidebar-bottom{display:grid;align-content:start;gap:.55rem}.sidebar-nav button,.sidebar-bottom button{width:100%;text-align:left}.sidebar-bottom{align-self:end;border-top:1px solid var(--border);padding-top:1rem}.hamburger{display:none;position:fixed;top:12px;left:12px;z-index:40;width:44px;height:44px;padding:0;place-items:center;font-size:1.25rem;background:var(--panel);box-shadow:var(--shadow)}.sidebar-backdrop{display:none}.main-panel{width:min(1480px,100%);padding:24px}.content-header{margin:0 0 1rem}.content-header h2{margin:0;font-size:clamp(1.6rem,3vw,2.2rem)}.card{background:color-mix(in srgb,var(--panel) 96%,transparent);border:1px solid var(--border);border-radius:22px;padding:1rem;box-shadow:var(--shadow)}.grid,.page-grid,.dashboard-grid,.board-card,.task-form,.settings-card,.position-editor,.solution-recorder{display:grid;gap:1rem}.page-grid{grid-template-columns:1fr}.dashboard-grid{grid-template-columns:minmax(0,1.2fr) minmax(320px,.8fr);align-items:start}.task-workspace{display:grid;justify-items:center}.single-board-card{width:min(920px,100%)}.section-heading{display:flex;justify-content:space-between;gap:1rem;align-items:start}.compact-heading{margin-bottom:-.25rem}.section-heading h2,.section-heading h3{margin:0}.eyebrow{color:var(--muted);margin:0 0 .25rem;text-transform:uppercase;letter-spacing:.08em;font-size:.75rem;font-weight:800}.muted{color:var(--muted)}.error,.success{border-radius:14px;padding:.8rem .9rem;border:1px solid currentColor}.error{color:var(--danger);background:color-mix(in srgb,var(--danger) 10%,transparent)}.success{color:var(--success);background:color-mix(in srgb,var(--success) 10%,transparent)}.button-row,.actions,.filters,.preferences,.stats-row{display:flex;gap:.6rem;align-items:center}.wrap,.actions{flex-wrap:wrap}.two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.8rem;align-items:start}.three-col{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.8rem;align-items:end}.task-builder-grid{align-items:stretch}.check{display:flex;align-items:center;gap:.45rem;font-weight:600}.check input{width:auto}.table-wrap{overflow-x:auto}.assignment-box{display:grid;gap:.8rem;margin:1rem 0}.task-checkboxes{display:grid;gap:.45rem}.assignment-check{grid-template-columns:auto 1fr auto;border:1px solid var(--border);padding:.65rem;border-radius:14px;background:var(--panel)}.stat-box{background:var(--panel-2);border:1px solid var(--border);border-radius:16px;padding:.75rem;min-width:84px;display:grid;gap:.1rem}.stat-box span{color:var(--muted);font-size:.78rem}.stat-box strong{font-size:1.12rem}.task-card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:.9rem}.task-card{border:1px solid var(--border);background:var(--panel);border-radius:18px;padding:1rem;display:grid;gap:.9rem}.task-card h3{margin:0}.task-card.locked{opacity:.72}.task-meta-row{display:flex;flex-wrap:wrap;gap:.45rem}.task-meta-row span{border:1px solid var(--border);border-radius:999px;padding:.25rem .55rem;color:var(--muted);font-size:.82rem}.chess-board{width:min(100%,680px);aspect-ratio:1 / 1;display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);overflow:hidden;border-radius:18px;border:2px solid var(--border);box-shadow:var(--shadow);touch-action:manipulation;justify-self:center}.square{position:relative;display:grid;place-items:center;min-width:0;min-height:0;aspect-ratio:1 / 1;border:none;border-radius:0;padding:0}.square:hover:not(:disabled){transform:none;box-shadow:inset 0 0 0 3px #ffffff4d}.light-square{background:var(--light-square)}.dark-square{background:var(--dark-square)}.theme-classic{--light-square: #f0d9b5;--dark-square: #b58863}.theme-blue{--light-square: #d8e6f3;--dark-square: #6d91b6}.theme-green{--light-square: #e6ecd4;--dark-square: #769656}.theme-wood{--light-square: #ead2a4;--dark-square: #9b6a3f}.theme-contrast{--light-square: #f8fafc;--dark-square: #334155}.selected-square{box-shadow:inset 0 0 0 4px #f5c542}.last-move-square{box-shadow:inset 0 0 0 4px #f5c542a6}.legal-square:after{content:"";width:28%;aspect-ratio:1 / 1;border-radius:999px;background:#143c1e59;position:absolute}.piece{line-height:1;font-size:clamp(2rem,8.5vw,4.4rem);-webkit-user-select:none;user-select:none;filter:drop-shadow(0 2px 1px rgba(0,0,0,.25));z-index:1}.piece[draggable=true]{cursor:grab}.piece-set-letters{font-weight:900;font-size:clamp(1.4rem,6vw,3.2rem)}.piece-b{color:#111827}.piece-w{color:#f9fafb;text-shadow:0 0 1px #111827}.theme-contrast .piece-b{color:#020617}.coord{position:absolute;font-size:.68rem;font-weight:800;color:#00000080}.file-coord{bottom:3px;right:4px}.rank-coord{top:3px;left:4px}.dark-square .coord{color:#ffffff8c}.symbol-controls{display:grid;grid-template-columns:repeat(4,minmax(54px,1fr));gap:.5rem;width:min(100%,520px);justify-self:center}.symbol-controls button{font-size:1.55rem;padding:.4rem .5rem;line-height:1}.resume-button{justify-self:center}.move-table{display:grid;gap:.7rem;border-top:1px solid var(--border);padding-top:.9rem}.move-table-empty{color:var(--muted);border:1px dashed var(--border);border-radius:14px;padding:.9rem}.variation-block{display:grid;gap:.45rem;background:var(--panel-2);border:1px solid var(--border);border-radius:16px;padding:.65rem}.variation-block.active{border-color:var(--primary)}.variation-title{display:flex;justify-content:space-between;gap:.8rem;align-items:center;width:100%;background:transparent;border:none;padding:.1rem;font-weight:800}.variation-title:hover{transform:none}.variation-title small{color:var(--muted);font-weight:700}.variation-moves{display:flex;flex-wrap:wrap;gap:.35rem}.move-pill{display:inline-flex;align-items:center;gap:.25rem;padding:.32rem .48rem;border-radius:10px;background:var(--panel)}.move-pill.active{border-color:var(--primary);background:color-mix(in srgb,var(--primary) 16%,var(--panel))}.move-pill.wrong{color:var(--danger);text-decoration:line-through}.move-number{color:var(--muted);font-weight:800}.move-pill small{color:var(--muted);font-size:.7rem}.position-toolbar{display:grid;gap:.75rem}.piece-palette{display:flex;flex-wrap:wrap;gap:.4rem}.piece-palette button{min-width:44px;min-height:44px;padding:.35rem;font-size:1.55rem;line-height:1}.editor-board-wrap .chess-board,.solution-recorder .chess-board{width:min(100%,440px)}.recorder-line{border:1px solid var(--border);background:var(--panel-2);border-radius:14px;padding:.75rem;min-height:2.75rem}.analysis-grid{display:grid;grid-template-columns:minmax(280px,520px) 1fr;gap:1rem;align-items:start}.one-board-detail{margin-top:1rem;border-top:1px solid var(--border);padding-top:1rem}.progress-detail h3{margin-bottom:.25rem}.promotion-picker{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap;background:var(--panel-2);border:1px solid var(--border);border-radius:16px;padding:.8rem}@media(max-width:1120px){.dashboard-grid,.analysis-grid,.task-builder-grid,.three-col{grid-template-columns:1fr}}@media(max-width:900px){.layout-shell{grid-template-columns:1fr}.hamburger{display:grid}.app-sidebar{position:fixed;left:0;transform:translate(-105%);transition:transform .18s ease;width:min(var(--sidebar-width),86vw)}.sidebar-is-open .app-sidebar{transform:translate(0)}.sidebar-is-open .sidebar-backdrop{display:block;position:fixed;inset:0;background:#00000059;z-index:10}.main-panel{padding:70px 12px 24px}}@media(max-width:640px){.card{padding:.8rem;border-radius:18px}.section-heading,.filters,.preferences,.button-row,.stats-row{align-items:stretch;flex-direction:column}.two-col{grid-template-columns:1fr}.stats-row{flex-direction:row;flex-wrap:wrap}.stat-box{flex:1 1 120px}.symbol-controls{grid-template-columns:repeat(4,1fr)}.piece{font-size:clamp(1.7rem,10vw,3.2rem)}th,td{padding:.55rem}}.main-panel{max-width:100%;overflow-x:hidden}.content-header{min-height:44px}.task-card-button{width:100%;text-align:left;color:var(--text);cursor:pointer;align-items:stretch}.task-card-button:hover:not(:disabled){transform:translateY(-2px);border-color:var(--primary)}.task-card-button:disabled{opacity:.72}.task-card-hint{color:var(--primary);font-weight:800;justify-self:start}.next-task-button{justify-self:center;width:min(100%,520px)}.tabs{display:flex;flex-wrap:wrap;gap:.5rem;margin:.8rem 0}.member-editor{margin-top:1rem;display:grid;gap:.8rem;border-top:1px solid var(--border);padding-top:1rem}.chess-board{width:min(100%,calc(100vw - 2rem),680px);container-type:inline-size}.editor-board-wrap .chess-board,.solution-recorder .chess-board{width:min(100%,calc(100vw - 2rem),440px)}.analysis-board-panel{display:grid;gap:.5rem;justify-items:center;min-width:0}.analysis-board-panel .chess-board{width:min(100%,520px)}.square:disabled{opacity:1;color:inherit}.square .piece{display:flex;align-items:center;justify-content:center;width:100%;height:100%;line-height:1;font-family:Segoe UI Symbol,Apple Symbols,"Noto Sans Symbols 2",DejaVu Sans,sans-serif;font-size:clamp(1.65rem,7vw,3.4rem);font-size:clamp(1.65rem,9.35cqw,4.25rem);transform:translateY(-.015em)}.square .piece-set-letters{font-size:clamp(1.25rem,6.9cqw,3.2rem)}.lichess-move-table{border-top:0;padding-top:0}.lichess-move-table .variation-block{padding:0;overflow:hidden;background:var(--panel)}.lichess-move-table .variation-title{padding:.75rem .9rem;border-bottom:1px solid var(--border);border-radius:0;background:color-mix(in srgb,var(--panel-2) 75%,var(--panel))}.notation-table{table-layout:fixed;font-size:.92rem}.notation-table th,.notation-table td{padding:.45rem .55rem;vertical-align:middle}.notation-table th:first-child,.notation-table td:first-child{width:3.2rem;text-align:right;color:var(--muted);font-weight:800}.notation-table tbody tr:nth-child(odd){background:color-mix(in srgb,var(--panel-2) 45%,transparent)}.notation-cell{display:flex;flex-wrap:wrap;gap:.25rem;min-height:2rem;align-items:center}.notation-move{display:inline-flex;align-items:center;gap:.2rem;padding:.22rem .38rem;border-radius:8px;border:1px solid transparent;background:transparent;font-weight:700;min-height:1.75rem}.notation-move:hover:not(:disabled){transform:none;border-color:var(--primary);background:color-mix(in srgb,var(--primary) 8%,transparent)}.notation-move.active{border-color:var(--primary);background:color-mix(in srgb,var(--primary) 18%,var(--panel))}.notation-move.wrong{color:var(--danger);text-decoration:line-through}.notation-move small{color:var(--muted);font-size:.68rem}.wrong-mark{font-weight:900}@media(max-width:900px){body{background:var(--bg)}.content-header{padding-left:54px;margin-bottom:.7rem}.content-header h2{font-size:clamp(1.3rem,7vw,1.8rem)}.main-panel,.single-board-card{width:100%}.dashboard-grid{gap:.8rem}.task-card-grid{grid-template-columns:1fr}.analysis-grid{gap:.8rem}}@media(max-width:640px){body{font-size:15px}.main-panel{padding:64px 8px 16px}.card{padding:.72rem;border-radius:16px}.task-card{padding:.85rem;border-radius:16px}.button-row>button,.actions>button,.filters>button,.tabs>button{width:100%}.symbol-controls{gap:.35rem;width:100%}.symbol-controls button{min-height:44px;font-size:1.35rem}.stats-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.45rem}.stat-box{min-width:0;padding:.55rem}.chess-board{border-radius:12px;border-width:1px}.coord{font-size:.58rem}.file-coord{bottom:2px;right:3px}.rank-coord{top:2px;left:3px}.notation-table th,.notation-table td{padding:.35rem .32rem}.notation-table th:first-child,.notation-table td:first-child{width:2.4rem}.notation-move{padding:.18rem .28rem;font-size:.9rem}.assignment-check{grid-template-columns:auto 1fr}.assignment-check small{grid-column:2}input,textarea,select{padding:.68rem}}@media(max-width:380px){.main-panel{padding-left:6px;padding-right:6px}.card{padding:.6rem}.stats-row{grid-template-columns:1fr 1fr}.notation-move{font-size:.84rem}}.sidebar-close{position:absolute;top:10px;left:10px;width:42px;height:42px;padding:0;display:none;place-items:center;font-size:1.6rem;line-height:1;z-index:2}.sidebar-subnav{display:grid;gap:.35rem;padding:.2rem 0 .45rem .65rem;border-left:2px solid var(--border);margin-left:.45rem}.sidebar-subnav p{margin:.45rem 0 .05rem;color:var(--muted);font-size:.72rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase}.sidebar-subnav button{font-size:.92rem;padding:.48rem .6rem;overflow-wrap:anywhere}.sidebar-subnav button:disabled{opacity:.48}.task-group-overview{display:grid;gap:.75rem;margin-top:1rem}.task-group-overview h3{margin:0}.analysis-side-panel{display:grid;gap:1rem;min-width:0}.grading-box,.coach-feedback-box,.settings-subsection{display:grid;gap:.75rem;border:1px solid var(--border);border-radius:16px;padding:.9rem;background:color-mix(in srgb,var(--panel-2) 55%,var(--panel))}.grading-box h4,.coach-feedback-box h3,.settings-subsection h3{margin:0}.coach-feedback-box p{margin:0;white-space:pre-wrap}.chess-board{max-width:100%}.square .piece{font-size:clamp(1.55rem,8.7cqw,3.95rem);transform:translateY(0);text-align:center}.square .piece-set-letters{font-size:clamp(1.2rem,6.2cqw,3rem)}.piece-w{text-shadow:0 1px 1px #111827,0 0 1px #111827}.notation-move.wrong{text-decoration-thickness:2px}@media(min-width:901px){.app-sidebar{transform:none!important}}@media(max-width:900px){.app-sidebar{padding-top:4rem}.sidebar-close{display:grid}.hamburger{left:10px;right:auto}}@media(max-width:720px){.analysis-grid{grid-template-columns:1fr}.analysis-board-panel .chess-board{width:min(100%,calc(100vw - 2rem))}.table-wrap table,.notation-table{font-size:.88rem}.tabs{display:grid;grid-template-columns:1fr}}@media(max-width:480px){.content-header{padding-left:52px}.app-sidebar{width:92vw}.sidebar-brand h1{font-size:1.25rem}.task-meta-row span{font-size:.75rem}.chess-board{width:min(100%,calc(100vw - 1rem))}.square .piece{font-size:clamp(1.35rem,8.25cqw,3.4rem)}.notation-cell{gap:.15rem}.notation-move{min-height:1.55rem}}
