@import"https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600;700&display=swap";:root{font-family:Sora,sans-serif;color:#f1f0e8;background:#07130d}body{margin:0;min-height:100vh;background:radial-gradient(circle at top left,#103021,#07130d 45%)}:root{--bg: #07130d;--surface: #0d1f16;--surface-muted: #103021;--text: #f1f0e8;--muted: #a7b4ae;--border: #244a37;--primary: #d4b35f;--primary-strong: #f0cd70;--danger: #ff5c7a;--highlight: #f0cd70;--board-light: #f0d9b5;--board-dark: #b58863}*{box-sizing:border-box}:focus-visible{outline:3px solid var(--highlight);outline-offset:2px}.app-shell{max-width:1240px;margin:0 auto;padding:40px 24px 64px;color:var(--text)}.app-layout{display:grid;grid-template-columns:240px minmax(0,1fr);max-width:1440px;margin:0 auto;min-height:100vh}.app-layout-main{min-width:0}.app-sidebar{border-right:1px solid var(--border);background:linear-gradient(180deg,color-mix(in srgb,var(--surface) 92%,transparent),color-mix(in srgb,var(--bg) 96%,transparent));position:sticky;top:0;height:100vh;overflow:auto}.app-sidebar-inner{padding:16px 12px}.app-nav-root{border:1px solid var(--border);border-radius:14px;background:color-mix(in srgb,var(--surface) 70%,transparent);padding:12px}.app-nav-root-summary{cursor:pointer;list-style:none;font-weight:600;color:var(--text)}.app-nav-root summary::-webkit-details-marker{display:none}.app-nav{margin-top:12px;display:grid;gap:8px}.app-nav-link{display:block;padding:10px;border-radius:10px;border:1px solid transparent;color:#c5cede;text-decoration:none}.app-nav-link:hover{background:color-mix(in srgb,var(--primary) 12%,transparent);border-color:color-mix(in srgb,var(--primary) 28%,transparent);color:var(--text)}.app-nav-link:focus-visible{border-color:var(--highlight)}.app-nav-link-active{background:color-mix(in srgb,var(--primary) 16%,transparent);border-color:color-mix(in srgb,var(--primary) 40%,transparent);color:var(--text)}.app-nav-section{border:1px solid var(--border);border-radius:12px;padding:8px;background:color-mix(in srgb,var(--surface) 82%,transparent)}.app-nav-section-summary{cursor:pointer;list-style:none;color:#d5def2;font-weight:600}.app-nav-section summary::-webkit-details-marker{display:none}.app-nav-section-links{margin-top:8px;display:grid;gap:6px}.app-sidebar-footer{margin-top:12px;padding-top:12px;border-top:1px solid var(--border)}@media(max-width:900px){.app-layout{grid-template-columns:1fr}.app-sidebar{position:relative;height:auto;border-right:0;border-bottom:1px solid var(--border)}.grid{grid-template-columns:1fr}.puzzle-board-column{grid-row:auto}}.hero{margin-bottom:24px}.hero-row{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.hero h1{font-size:2.25rem;margin:0 0 8px}.hero p{margin:0;color:var(--muted)}.hero-link-row{margin-top:10px}.hero-link-row a{color:var(--primary);text-decoration:none}.hero-link-row a:hover{text-decoration:underline}.hero-link-row a:focus-visible{text-decoration:underline;border-radius:6px}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.panel{border:1px solid var(--border);border-radius:14px;background:linear-gradient(180deg,var(--surface) 0%,var(--surface-muted) 100%);padding:16px;min-height:150px}.panel h2{margin:0 0 10px;font-size:1.1rem;color:var(--primary)}.panel p{margin:0;color:#c5cede;line-height:1.4}.board-panel{min-height:0}.board-meta{margin-bottom:10px;color:#c5cede}.board-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}.board-header-spacer{flex:1}.board-trait{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;border:1px solid var(--border);background:color-mix(in srgb,var(--surface) 75%,transparent);color:var(--text);font-weight:600;font-size:1rem}.board-trait-label{color:var(--muted);font-weight:600}.board-trait-value{color:var(--text);font-weight:700;font-size:1.15rem}.board-subtitle{margin:8px 0 10px;color:var(--muted)}.board-help{margin-bottom:10px;color:#c5cede;font-size:.92rem}.board-help strong{color:var(--text)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.board-grid{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));width:100%;min-width:352px;max-width:640px;border:1px solid var(--border);border-radius:10px;overflow:hidden}.board-body{display:grid;grid-template-columns:minmax(24px,34px) minmax(0,1fr);gap:12px;align-items:start}.board-accessory{align-self:stretch}.board-square{border:0;margin:0;aspect-ratio:1 / 1;min-width:44px;min-height:44px;line-height:1;cursor:pointer;display:grid;place-items:center;background:transparent;position:relative;isolation:isolate;touch-action:none}.board-square>*{position:relative;z-index:1}.board-square-last-from:after,.board-square-last-to:after{content:"";position:absolute;inset:0;z-index:0;pointer-events:none}.board-square-last-from:after{background:#f0cd7080;background:color-mix(in srgb,var(--highlight) 50%,transparent)}.board-square-last-to:after{background:#f0cd70c7;background:color-mix(in srgb,var(--highlight) 78%,transparent)}.board-coord{position:absolute;pointer-events:none;font-size:.72rem;font-weight:700;opacity:.85;letter-spacing:.02em}.board-coord-rank{top:6px;left:6px}.board-coord-file{right:6px;bottom:6px;text-transform:lowercase}.board-square-light .board-coord{color:#121212bf}.board-square-dark .board-coord{color:#ffffffc7}.board-square-light{background:var(--board-light)}.board-square-dark{background:var(--board-dark)}.board-piece{font-size:2.35rem;line-height:1;font-family:Apple Symbols,Segoe UI Symbol,"Noto Sans Symbols 2",DejaVu Sans,sans-serif}@media(max-width:520px){.board-piece{font-size:2.15rem}}.board-piece-w{color:#f3f6ff;text-shadow:0 1px 0 rgba(0,0,0,.65),0 -1px 0 rgba(0,0,0,.65),1px 0 0 rgba(0,0,0,.65),-1px 0 0 rgba(0,0,0,.65),0 0 6px rgba(0,0,0,.45)}.board-piece-b{color:#0d1222;text-shadow:0 1px 0 rgba(255,255,255,.75),0 -1px 0 rgba(255,255,255,.75),1px 0 0 rgba(255,255,255,.75),-1px 0 0 rgba(255,255,255,.75),0 0 6px rgba(255,255,255,.25)}.board-square-selected{box-shadow:inset 0 0 0 3px var(--highlight)}.board-square-last-from{box-shadow:inset 0 0 0 6px #f0cd70b8,inset 0 0 0 10px #0000001a;box-shadow:inset 0 0 0 6px color-mix(in srgb,var(--highlight) 72%,transparent),inset 0 0 0 10px #0000001a}.board-square-last-to{box-shadow:inset 0 0 0 7px #f0cd70,inset 0 0 0 7px color-mix(in srgb,var(--highlight) 100%,transparent),inset 0 0 0 12px #0000001a,0 0 18px #f0cd7059}.board-square-drag-over{box-shadow:inset 0 0 0 3px color-mix(in srgb,var(--primary) 80%,transparent)}.board-move-dot{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none}.board-move-dot:before{content:"";width:12px;height:12px;border-radius:999px;background:#0b102073;box-shadow:0 0 0 1px #f5f7ff29,0 0 0 2px #05070f1f}.board-move-dot-capture:before{width:22px;height:22px;background:transparent;border:3px solid rgba(11,16,32,.45);box-shadow:0 0 0 1px #f5f7ff2e,0 0 0 4px #05070f14}.board-square-disabled{cursor:not-allowed;opacity:.75}.board-square:focus-visible{position:relative;z-index:1}.eval-bar{position:relative;width:100%;height:100%;min-height:0;border:1px solid var(--border);border-radius:10px;overflow:hidden;background:#0a1020}.eval-bar-track{position:absolute;inset:0;background:linear-gradient(180deg,#f3f6ff 0%,#cfd7ea 50%,#0d1222 50%,var(--bg) 100%)}.eval-bar-marker{position:absolute;left:0;right:0;height:4px;background:color-mix(in srgb,var(--highlight) 95%,transparent);box-shadow:0 0 0 1px #05070f59;transform:translateY(-2px);transition:top .22s ease}.puzzle-objective{margin-bottom:10px}.puzzle-meta{margin-bottom:10px;color:#9ab3d6}.puzzle-context-list{margin:0;padding-left:18px;display:grid;gap:6px;color:#c5cede}.puzzle-context-list a{color:var(--primary)}.puzzle-grid{grid-template-columns:minmax(520px,1.75fr) minmax(320px,.65fr);align-items:start;grid-auto-rows:min-content}.puzzle-board-column{display:grid;gap:16px;grid-row:span 2}.puzzle-side-column{display:grid;gap:16px;align-content:start}.eval-gain-meta{margin:0;color:var(--muted)}.eval-gain-list{list-style:none;margin:0;padding:0;display:grid;gap:6px;color:var(--muted)}.eval-gain-list strong{color:var(--text)}.eval-gain-value{margin:10px 0 0;font-size:1.75rem;font-weight:800;color:var(--text)}.eval-gain-unit{font-size:1rem;font-weight:700;color:var(--muted)}.eval-gain-cp{font-size:.95rem;font-weight:700;color:var(--muted)}.eval-gain-placeholder{color:var(--muted)}.puzzle-board-column-compact{grid-row:auto}.attempt-result{margin-top:10px;border:1px solid var(--border);border-radius:10px;padding:10px}.attempt-result p{margin:0 0 8px}.attempt-result:focus-visible{outline-color:var(--highlight)}.attempt-result-correct{border-color:#2f7f54;background:#10291d}.attempt-result-incorrect{border-color:#875040;background:#2a1a14}.explanation-panel{min-height:0}.explanation-block{border:1px solid var(--border);border-radius:10px;background:#0a1020;padding:10px;margin-top:10px}.explanation-label{margin-bottom:8px;color:var(--text)}.explanation-takeaway{margin-top:12px;padding-top:10px;border-top:1px solid var(--border);color:#d5def2}.puzzle-actions{margin-top:12px;display:flex;gap:10px;flex-wrap:wrap}.progress-summary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.progress-kpi{font-size:2rem;font-weight:700;color:var(--text);margin-bottom:8px!important}.progress-mistakes-panel{grid-column:span 2}.progress-mistakes-list{margin:0;padding-left:18px;display:grid;gap:8px;color:#d3dbeb}.trend-list{margin:0;padding-left:0;list-style:none;display:grid;gap:10px}.trend-list-item{display:flex;justify-content:space-between;align-items:center;gap:12px;border:1px solid var(--border);border-radius:10px;background:#0a1020;padding:12px}.trend-title{margin:0 0 6px!important}.trend-meta{margin:0!important;color:#c9d5ea!important}.trend-badge{display:inline-flex;align-items:center;justify-content:center;min-width:88px;min-height:32px;border-radius:999px;border:1px solid var(--border);padding:0 10px;font-size:.85rem;font-weight:600}.trend-badge-up{border-color:#2f7f54;color:#8be7b5;background:#10291d}.trend-badge-down{border-color:#875040;color:#ffb28f;background:#2a1a14}.trend-badge-stable{border-color:#556180;color:#c7d4ee;background:#151f37}.trend-badge-new{border-color:#4b73ae;color:#9fc3ff;background:#102544}.data-inventory-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.data-delete-zone{grid-column:span 2}.data-delete-summary{margin-top:12px;border:1px solid #5c2a39;border-radius:10px;padding:10px;background:#1c1017}.data-delete-summary p{margin:0 0 8px}.coach-selected-context{margin-bottom:12px}.coach-student-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}.coach-student-item{border:1px solid var(--border);border-radius:10px;background:#0a1020;padding:12px;display:flex;align-items:center;justify-content:space-between;gap:12px}.coach-student-item p{margin:0 0 6px}.coach-review-grid{grid-template-columns:minmax(300px,.9fr) minmax(0,1.1fr);align-items:start}.coach-mistake-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}.coach-mistake-item{border:1px solid var(--border);border-radius:10px;background:#0a1020;padding:12px;display:flex;align-items:center;justify-content:space-between;gap:12px}.coach-mistake-item p{margin:0 0 6px}.coach-mistake-item .auth-submit{margin-top:0}.coach-review-grid a{color:var(--primary)}.auth-shell{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:32px 16px}.auth-card{width:min(480px,100%);border:1px solid var(--border);border-radius:16px;padding:24px;background:linear-gradient(180deg,var(--surface) 0%,var(--surface-muted) 100%);box-shadow:0 10px 30px #00000040}.auth-card h1{margin:0;font-size:1.5rem}.auth-subtitle{margin:8px 0 20px;color:var(--muted)}.auth-form{display:grid;gap:10px}.auth-label{font-size:.9rem}.auth-input{width:100%;border:1px solid var(--border);border-radius:10px;padding:10px 12px;color:var(--text);background:#0a1020}.auth-input:focus{outline:2px solid var(--primary);outline-offset:2px}.auth-checkbox{margin-top:6px;display:flex;gap:8px;align-items:center;color:var(--muted)}.auth-submit{margin-top:10px;border:0;border-radius:10px;padding:11px 14px;min-height:44px;min-width:44px;font-weight:600;color:#051127;background:linear-gradient(180deg,var(--primary) 0%,var(--primary-strong) 100%);cursor:pointer}.auth-submit:disabled{opacity:.7;cursor:wait}.logout-button{border:1px solid var(--border);border-radius:10px;background:#0a1020;color:var(--text);padding:10px 14px;min-height:44px;min-width:44px;cursor:pointer}.logout-button:disabled{opacity:.7;cursor:wait}.danger-zone{margin-top:28px;border:1px solid #522032;border-radius:14px;padding:16px;background:linear-gradient(180deg,#1f1020,#140a14)}.danger-zone h2{margin:0 0 8px;color:#ff9eb5}.danger-zone p{margin:0 0 12px;color:#d2a4b0}.delete-button{margin-top:10px;border:0;border-radius:10px;padding:11px 14px;min-height:44px;min-width:44px;font-weight:600;color:#220511;background:linear-gradient(180deg,#f06a87,#dc5170);cursor:pointer}.delete-button:disabled{opacity:.7;cursor:wait}.import-zone{margin-top:28px;border:1px solid var(--border);border-radius:14px;padding:16px;background:linear-gradient(180deg,#111a30,#0d1324)}.import-zone h2{margin:0 0 8px;color:var(--primary)}.import-zone p{margin:0 0 12px;color:var(--muted)}.import-form{display:grid;gap:10px;max-width:420px}.import-meta{margin:10px 0 0;color:#c5cede}.candidate-list{margin:10px 0 0;padding:0;list-style:none;display:grid;gap:8px}.candidate-item{border:1px solid var(--border);border-radius:10px;padding:10px;background:#0a1020}.candidate-checkbox{display:flex;gap:8px;align-items:center;color:var(--text)}.import-warning{margin-top:12px;border:1px solid #685a1c;border-radius:10px;padding:10px;background:#1b180b}.import-warning p{margin:0 0 6px;color:var(--highlight)}.import-warning ul{margin:0;padding-left:18px;color:#e4d6a7}.import-submit{margin-top:12px}.import-submit-secondary{background:#0a1020;color:var(--text);border:1px solid var(--border)}.import-summary{margin-top:12px;border:1px solid #2d4a2f;border-radius:10px;padding:10px;background:#0d1d13}.import-summary p{margin:0 0 4px;color:#9bd2a9}.analysis-progress{margin:4px 0 6px;width:100%;max-width:360px}.auth-message{margin-top:12px}.auth-switch{margin-top:14px;color:var(--muted)}.auth-switch a{color:var(--primary);text-decoration:none}.auth-switch a:hover{text-decoration:underline}.auth-message-error{color:var(--danger)}.auth-message-success{color:#5dd39e}