:root{--font-display: "Fraunces", "Times New Roman", serif;--font-body: "Manrope", -apple-system, system-ui, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, monospace;--pad: 22px;--gap: 18px;--radius-lg: 28px;--radius-md: 18px;--radius-sm: 12px;--sidebar-w: 248px;--sky-1: #fbe9d8;--sky-2: #f6dde6;--sky-3: #e9d9f0;--ground-1: #c8d8b1;--ground-2: #aac49a;--ground-3: #8eb09a;--hill: #b7c6dd;--sun: #ffd7a8;--bloom-a: #f5a99b;--bloom-b: #f6c6dd;--bloom-c: #d6c4ec;--bloom-d: #ffe49a;--particle: rgba(255, 240, 215, .85);--ink: #2e2540;--ink-soft: #5b4f6d;--ink-mute: #8c83a0;--ink-faint: #c4bdd2;--paper: #fbf6ef;--paper-2: #f4ecdf;--line: rgba(46, 37, 64, .08);--line-strong: rgba(46, 37, 64, .16);--glass-bg: rgba(255, 252, 246, .62);--glass-bg-strong: rgba(255, 252, 246, .78);--glass-border: rgba(255, 255, 255, .72);--glass-shadow: 0 24px 60px -28px rgba(89, 64, 122, .35), 0 2px 0 rgba(255, 255, 255, .7) inset;--gold: #d6a35a;--accent: #b48bd6;--accent-2: #5fa7a1;--warm: #e08a6f;--halo: radial-gradient( circle at 50% 50%, rgba(255, 245, 200, .95) 0%, rgba(255, 220, 180, .55) 35%, rgba(255, 220, 180, 0) 75% )}.app[data-palette=day]{--sky-1: #d8ecf8;--sky-2: #e6f1f6;--sky-3: #f0f6ee;--ground-1: #b9d8b3;--ground-2: #94c19c;--ground-3: #6fa389;--hill: #a5bdd6;--sun: #fff3c6;--bloom-a: #f59fb0;--bloom-b: #c8e3f4;--bloom-c: #d8c8f0;--bloom-d: #fde58e;--particle: rgba(255, 255, 240, .95)}.app[data-palette=sunset]{--sky-1: #fbcfae;--sky-2: #f4a9b1;--sky-3: #c89bc8;--ground-1: #a7967e;--ground-2: #7d6f6a;--ground-3: #5b5360;--hill: #957aa3;--sun: #ffb37a;--bloom-a: #f58f7a;--bloom-b: #f7b3c4;--bloom-c: #c198d4;--bloom-d: #ffcf8a;--particle: rgba(255, 220, 180, .95);--paper: #fff3e8;--paper-2: #f7e6d6;--glass-bg: rgba(255, 246, 234, .55)}.app[data-palette=night]{--sky-1: #1e1a3a;--sky-2: #2a2150;--sky-3: #3a2a5e;--ground-1: #2e3257;--ground-2: #232649;--ground-3: #181a36;--hill: #3a3666;--sun: #cbb5ff;--bloom-a: #f5b8c9;--bloom-b: #b8c8ff;--bloom-c: #d8b8ff;--bloom-d: #fff0c0;--particle: rgba(220, 210, 255, .95);--paper: #f7f3ff;--paper-2: #ece4ff;--ink: #221a3a;--glass-bg: rgba(255, 252, 255, .72)}.app[data-density=airy]{--pad: 28px;--gap: 22px;--sidebar-w: 264px}.app[data-density=balanced]{--pad: 22px;--gap: 18px;--sidebar-w: 248px}.app[data-density=compact]{--pad: 16px;--gap: 12px;--sidebar-w: 220px}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;height:100%}body{font-family:var(--font-body);color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;font-feature-settings:"ss01","ss02";overflow:hidden}button{font:inherit;color:inherit}a{color:inherit}.app{position:fixed;top:0;right:0;bottom:0;left:0;display:grid;grid-template-columns:var(--sidebar-w) 1fr;background:radial-gradient(1200px 800px at 80% -10%,var(--sky-1) 0%,transparent 60%),radial-gradient(900px 700px at -10% 110%,var(--sky-3) 0%,transparent 65%),var(--paper);transition:background .8s ease;overflow:hidden}.sidebar{position:relative;padding:var(--pad);display:flex;flex-direction:column;gap:var(--gap);border-right:1px solid var(--line);background:linear-gradient(180deg,#ffffff73,#ffffff2e);backdrop-filter:blur(20px) saturate(120%);-webkit-backdrop-filter:blur(20px) saturate(120%);z-index:4}.brand{display:flex;align-items:center;gap:12px;padding:4px 6px 18px}.brand-mark{width:38px;height:38px;border-radius:12px;background:radial-gradient(circle at 30% 30%,#fff,transparent 55%),conic-gradient(from 200deg,var(--bloom-c),var(--bloom-a),var(--bloom-d),var(--accent-2),var(--bloom-c));box-shadow:0 8px 24px -8px #b48bd68c,0 0 0 1px #fff9 inset;position:relative}.brand-mark:after{content:"";position:absolute;top:8px;right:8px;bottom:8px;left:8px;border-radius:50%;background:radial-gradient(circle,#fff 0%,transparent 70%);opacity:.7}.brand-name{font-family:var(--font-display);font-size:22px;font-weight:500;letter-spacing:-.02em;font-style:italic;line-height:1}.brand-tag{font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-mute);margin-top:4px}.nav{display:flex;flex-direction:column;gap:2px}.nav-section{font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-mute);padding:14px 12px 6px}.nav-item{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:14px;font-size:14px;font-weight:500;color:var(--ink-soft);cursor:pointer;background:transparent;border:0;text-align:left;width:100%;position:relative;transition:background .22s ease,color .22s ease,transform .22s ease}.nav-item:hover{background:#ffffff8c;color:var(--ink)}.nav-item.active{background:linear-gradient(135deg,#ffffffd9,#ffffff8c);color:var(--ink);box-shadow:0 4px 14px -8px #59407a59,inset 0 0 0 1px #ffffffb3}.nav-item.active:before{content:"";position:absolute;left:-10px;top:50%;transform:translateY(-50%);width:4px;height:22px;border-radius:4px;background:linear-gradient(180deg,var(--accent),var(--warm))}.nav-glyph{width:26px;height:26px;flex-shrink:0;display:grid;place-items:center;color:var(--ink-soft)}.nav-item.active .nav-glyph{color:var(--accent)}.nav-meta{margin-left:auto;font-size:11px;color:var(--ink-mute);font-variant-numeric:tabular-nums}.nav-dot{width:6px;height:6px;border-radius:50%;background:var(--warm);box-shadow:0 0 0 3px #e08a6f2e}.sidebar-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px}.profile{display:flex;align-items:center;gap:12px;padding:10px;border-radius:16px;background:#ffffff8c;border:1px solid rgba(255,255,255,.65)}.profile-avatar{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,#ffd7c0,#f7b3c4);display:grid;place-items:center;font-family:var(--font-display);font-style:italic;font-size:18px;color:#fff;box-shadow:inset 0 0 0 2px #fff9}.profile-name{font-size:13px;font-weight:600;line-height:1.1}.profile-sub{font-size:11px;color:var(--ink-mute);margin-top:2px}.main{position:relative;display:grid;grid-template-rows:auto 1fr;overflow:hidden;min-height:0}.topbar{display:flex;align-items:center;gap:14px;padding:calc(var(--pad) - 4px) var(--pad) 6px;z-index:3}.greet{font-family:var(--font-display);font-style:italic;font-weight:400;font-size:26px;letter-spacing:-.015em;line-height:1.1;color:var(--ink)}.greet 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var(--pad);overflow:hidden;min-height:0}.content.single{grid-template-columns:1fr}.hero{position:relative;border-radius:var(--radius-lg);overflow:hidden;background:linear-gradient(180deg,var(--sky-1) 0%,var(--sky-2) 45%,var(--sky-3) 85%);border:1px solid var(--glass-border);box-shadow:var(--glass-shadow);min-height:0}.hero:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;background:radial-gradient(ellipse at 50% 50%,transparent 60%,rgba(46,37,64,.18) 100%)}.rail{display:grid;grid-template-rows:auto auto 1fr;gap:var(--gap);min-height:0;min-width:0}.card{position:relative;border-radius:var(--radius-lg);background:var(--glass-bg);backdrop-filter:blur(18px) saturate(125%);-webkit-backdrop-filter:blur(18px) saturate(125%);border:1px solid var(--glass-border);box-shadow:var(--glass-shadow);padding:var(--pad);overflow:hidden}.card-title{font-family:var(--font-display);font-style:italic;font-weight:400;font-size:22px;letter-spacing:-.01em;line-height:1.1;margin:0}.card-kicker{font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-mute);margin-bottom:8px;display:flex;align-items:center;gap:8px}.card-kicker:before{content:"";display:inline-block;width:14px;height:1px;background:currentColor}.focus{display:flex;flex-direction:column;gap:14px}.focus-task{font-family:var(--font-display);font-size:28px;line-height:1.15;letter-spacing:-.015em;font-style:italic;font-weight:400}.focus-task strong{background:linear-gradient(120deg,var(--accent) 0%,var(--warm) 100%);-webkit-background-clip:text;background-clip:text;color:transparent;font-style:italic;font-weight:500}.focus-meta{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--ink-soft);flex-wrap:wrap}.focus-meta 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var(--line-strong);color:var(--ink);font-size:13px;font-weight:500;cursor:pointer}.btn-ghost:hover{background:#ffffff80}.breath{position:relative;width:18px;height:18px;border-radius:50%;background:radial-gradient(circle at 30% 30%,#fff,var(--bloom-a) 80%);box-shadow:0 0 #f5a99b80;animation:breath 5.5s ease-in-out infinite}@keyframes breath{0%,to{transform:scale(1);box-shadow:0 0 #f5a99b99}50%{transform:scale(1.35);box-shadow:0 0 0 8px #f5a99b00}}.stat-row{display:flex;gap:10px;flex-wrap:wrap}.stat{flex:1;min-width:0;padding:12px 14px;border-radius:16px;background:#ffffff8c;border:1px solid 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rgba(255,255,255,.7);display:inline-flex;align-items:center;gap:8px;pointer-events:none}.scene-caption .dot{width:6px;height:6px;background:var(--accent);border-radius:50%}.scene-hud{position:absolute;top:18px;right:18px;display:flex;flex-direction:column;gap:8px;z-index:4;align-items:flex-end}.hud-pill{display:inline-flex;align-items:center;gap:8px;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink);background:#ffffff9e;padding:6px 12px;border-radius:999px;border:1px solid rgba(255,255,255,.7);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.hud-pill .val{font-family:var(--font-display);font-style:italic;font-weight:500;font-size:14px;text-transform:none;letter-spacing:-.01em;color:var(--ink)}.scene-toolbar{position:absolute;left:50%;bottom:16px;transform:translate(-50%);display:flex;gap:8px;z-index:4}.scene-toolbar 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#59407a73;z-index:5;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.quest-list{display:flex;flex-direction:column;gap:8px;margin-top:4px}.quest{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:14px;background:#ffffff80;border:1px solid var(--line);font-size:13px}.quest-mark{width:22px;height:22px;border-radius:50%;border:1.5px solid var(--line-strong);display:grid;place-items:center;flex-shrink:0;color:var(--ink-mute)}.quest.done .quest-mark{background:linear-gradient(135deg,var(--accent),var(--warm));border-color:transparent;color:#fff}.quest.done .quest-text{color:var(--ink-mute);text-decoration:line-through;text-decoration-color:var(--ink-faint)}.quest-text{flex:1;min-width:0}.quest-reward{font-size:11px;color:var(--gold);font-weight:600}.sport{display:flex;align-items:center;gap:14px;padding:14px;border-radius:20px;background:linear-gradient(135deg,#b48bd62e,#f5a99b2e);border:1px solid 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strong{color:var(--ink);font-weight:600}.expr{font-family:var(--font-mono);font-size:18px;display:inline-flex;padding:6px 12px;border-radius:10px;background:linear-gradient(135deg,#b48bd62e,#f5a99b29);color:var(--ink)}.explain-steps{display:grid;gap:10px;padding:12px;border-radius:18px;background:#ffffff80;border:1px solid var(--line);margin:12px 0}.explain-steps li{list-style:none;padding-left:0;font-family:var(--font-mono);font-size:14px;color:var(--ink)}.explain-steps li:before{content:"▸";color:var(--accent);margin-right:8px}.practice-problem{display:grid;gap:10px;padding:16px;border-radius:18px;background:#fff9;border:1px solid var(--line);margin-bottom:10px}.practice-problem .q{font-size:15px;color:var(--ink)}.practice-problem .row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.practice-input{font-family:var(--font-mono);font-size:18px;padding:10px 14px;border-radius:14px;border:1px solid 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ease}.mood-btn:hover{background:#fff;transform:translateY(-1px)}.mood-btn.active{background:linear-gradient(135deg,var(--accent),var(--warm));color:#fff;border-color:transparent}.lesson-progress{display:flex;gap:6px;margin-bottom:14px}.lesson-progress-step{flex:1;height:4px;border-radius:4px;background:var(--line);transition:background .3s ease}.lesson-progress-step.done{background:linear-gradient(90deg,var(--accent),var(--warm))}.lesson-progress-step.current{background:linear-gradient(90deg,var(--accent),var(--warm));opacity:.5}.auth-shell{position:fixed;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;background:radial-gradient(1200px 800px at 80% -10%,var(--sky-1) 0%,transparent 60%),radial-gradient(900px 700px at -10% 110%,var(--sky-3) 0%,transparent 65%),var(--paper)}.auth-card{width:min(420px,92vw);padding:36px;border-radius:var(--radius-lg);background:var(--glass-bg-strong);-webkit-backdrop-filter:blur(20px) saturate(125%);backdrop-filter:blur(20px) 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