@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@500;600;700&display=swap";:root{--bg:#f8fafc;--surface:#fff;--surface-elevated:#fff;--chip-bg:#f8fafc;--border:#e5e7eb;--text:#0f172a;--text-strong:#0f172a;--muted:#64748b;--primary:#4f46e5;--primary-hover:#4338ca;--primary-soft:#eef2ff;--secondary:#14b8a6;--success:#22c55e;--warning:#f59e0b;--danger:#ef4444;--hint:#3b82f6;--locked:#94a3b8;--completed:#ecfdf5;--disabled:#cbd5e1;--focus:#4f46e5;--panel-shadow-sm:0 2px 6px #0f172a0d;--panel-shadow:0 8px 24px #0f172a14;--panel-shadow-lg:0 16px 48px #0f172a1f;--radius-xs:12px;--radius-sm:14px;--radius-md:20px;--radius-lg:24px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:24px;--space-7:32px;--space-8:40px;--space-9:48px;--space-10:64px;--body-font:"Inter", "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;--display-font:"Inter", "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;--font-size-body:16px;--font-size-heading:clamp(32px, 4vw, 40px);--motion-fast:.16s;--motion-base:.22s;--motion-medium:.2s;--ease-standard:cubic-bezier(.22, .61, .36, 1)}:root[data-theme=dark]{--bg:#0d141d;--surface:#162233;--surface-elevated:#1b2b40;--chip-bg:#203249;--border:#4d647f;--text:#e3edf8;--text-strong:#f5f9ff;--muted:#b0c1d6;--primary:#66e3c4;--primary-hover:#8aedd5;--secondary:#94bcff;--success:#5fdd9a;--warning:#ffcb70;--danger:#ff9a9a;--hint:#9dbdff;--locked:#86a0bf;--completed:#234f3c;--disabled:#7e94ad;--focus:#b1caff;--panel-shadow:0 18px 38px #0000005c}:root[data-reduce-motion=on]{--motion-fast:1ms;--motion-base:1ms}*{box-sizing:border-box}html,body,#root{min-height:100%;margin:0}body{min-height:100vh;font-family:var(--body-font);font-size:var(--font-size-body);color:var(--text);background:radial-gradient(1000px 460px at 100% -8%, #6366f11a, transparent 62%), radial-gradient(860px 380px at 0% 105%, #06b6d414, transparent 64%), radial-gradient(920px 420px at 82% 98%, #a855f712, transparent 66%), var(--bg);transition:background var(--motion-base) var(--ease-standard), color var(--motion-base) var(--ease-standard);overflow-x:clip}#root{width:100%;min-height:100vh;overflow-x:clip}@media (prefers-reduced-motion:reduce){:root{--motion-fast:1ms;--motion-base:1ms}}.app-shell{max-width:1100px;padding:var(--space-8) var(--space-5) var(--space-9);gap:var(--space-5);margin:0 auto;display:grid}.top-bar{justify-content:space-between;gap:var(--space-5);z-index:12;padding:var(--space-2) var(--space-4);border-radius:var(--radius-md);border:1px solid color-mix(in srgb, var(--border) 78%, #fff);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:var(--panel-shadow-sm);background:#ffffffd6;order:1;align-items:flex-start;display:flex;position:sticky;top:12px}:root[data-theme=dark] .top-bar{border:1px solid color-mix(in srgb, var(--border) 82%, #fff);background:color-mix(in srgb, var(--surface-elevated) 88%, transparent);box-shadow:0 8px 24px #0000004d}.game-settings{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:var(--space-4) var(--space-5);box-shadow:var(--panel-shadow);transition:transform var(--motion-base) var(--ease-standard), box-shadow var(--motion-base) var(--ease-standard);order:2}.game-settings h2{font-family:var(--display-font);color:var(--text-strong);margin:0 0 10px;font-size:16px;font-weight:700}.game-settings:hover{box-shadow:var(--panel-shadow-lg);transform:translateY(-2px)}.eyebrow{text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin:0 0 6px;font-size:12px}.top-bar h1{font-family:var(--display-font);color:var(--text-strong);font-size:var(--font-size-heading);margin:0;line-height:1.2}.subtitle{color:var(--muted);max-width:64ch;margin:4px 0 0;font-size:14px;line-height:1.4}.meta-panel{background:var(--surface-elevated);border:1px solid var(--border);border-radius:var(--radius-md);min-width:220px;box-shadow:var(--panel-shadow);padding:var(--space-3);gap:var(--space-2);transition:transform var(--motion-base) var(--ease-standard), box-shadow var(--motion-base) var(--ease-standard);display:grid}.meta-item{border-radius:var(--radius-xs);padding:var(--space-2) var(--space-3);background:color-mix(in srgb, var(--chip-bg) 72%, #fff);justify-content:space-between;align-items:center;display:flex}.meta-item span{color:var(--muted);font-size:13px}.meta-item strong{color:var(--text-strong)}.control-row{gap:var(--space-4);flex-wrap:wrap;order:6;justify-content:space-between;align-items:center;display:flex}.mode-switch,.challenge-cadence-switch{border:1px solid var(--border);background:color-mix(in srgb, var(--surface-elevated) 72%, transparent);box-shadow:var(--panel-shadow-sm);border-radius:999px;padding:4px;display:inline-flex}.mode-switch button{color:var(--muted);transition:background var(--motion-fast) var(--ease-standard), 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select{border-radius:var(--radius-sm);border:1px solid var(--border);min-width:72px;padding:var(--space-2) var(--space-3);background:var(--surface-elevated);color:var(--text-strong);box-shadow:var(--panel-shadow-sm);transition:border-color var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard)}.row-select select:focus-visible{border-color:var(--focus);box-shadow:0 0 0 4px color-mix(in srgb, var(--focus) 16%, transparent);outline:none}.button-row{gap:var(--space-3);flex-wrap:wrap;display:flex}button{font-family:inherit;font-weight:500}.button-row button,.connector-chip button,.social-actions button,.incoming-challenge-actions button,.challenge-history-actions button,.tutorial-actions button,.achievement-toast button{border:1px solid var(--border);border-radius:var(--radius-sm);padding:var(--space-2) var(--space-3);background:var(--surface-elevated);color:var(--text-strong);cursor:pointer;box-shadow:var(--panel-shadow-sm);transition:transform var(--motion-fast) var(--ease-standard), border-color var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard), background var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard)}.button-row button:hover,.connector-chip button:hover,.social-actions button:hover,.incoming-challenge-actions button:hover,.challenge-history-actions button:hover,.tutorial-actions button:hover,.achievement-toast button:hover{border-color:color-mix(in srgb, var(--primary) 34%, var(--border));box-shadow:var(--panel-shadow);transform:translateY(-2px)scale(1.02)}.button-row button:disabled,.connector-chip button:disabled,.social-actions button:disabled,.incoming-challenge-actions button:disabled,.challenge-history-actions button:disabled,.tutorial-actions button:disabled,.achievement-toast button:disabled{opacity:.6;cursor:not-allowed;box-shadow:none}.board-actions button:first-child,.social-actions button:first-child,.incoming-challenge-actions button:first-child,.tutorial-actions button:last-child{color:#fff;background:linear-gradient(#6366f1,#4f46e5);border-color:#0000;box-shadow:0 10px 24px #4f46e547}.board-actions button:first-child:hover,.social-actions button:first-child:hover,.incoming-challenge-actions button:first-child:hover,.tutorial-actions button:last-child:hover{background:linear-gradient(#7c7ff5,#4338ca)}.message-row{padding:0 var(--space-1);flex-wrap:wrap;order:5;align-items:baseline;gap:14px;display:flex}.message-row p{margin:0}.solved{color:var(--success);font-weight:800}.settings-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:var(--space-5);box-shadow:var(--panel-shadow);transition:transform var(--motion-base) var(--ease-standard), box-shadow var(--motion-base) var(--ease-standard);order:7}.stats-panel{background:var(--surface);border:1px solid 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var(--border);border-radius:var(--radius-md);padding:var(--space-5);box-shadow:var(--panel-shadow);transition:transform var(--motion-base) var(--ease-standard), box-shadow var(--motion-base) var(--ease-standard);order:9}.social-panel h2,.leaderboard-panel h2,.achievements-panel h2{font-family:var(--display-font);color:var(--text-strong);margin:0;font-weight:700}.settings-panel:hover,.stats-panel:hover,.social-panel:hover,.leaderboard-panel:hover,.achievements-panel:hover,.board-wrap:hover,.connector-list:hover,.meta-panel:hover{box-shadow:var(--panel-shadow-lg);transform:translateY(-2px)}.leaderboard-head{justify-content:space-between;align-items:center;gap:var(--space-3);flex-wrap:wrap;display:flex}.scope-switch{border:1px solid var(--border);background:var(--surface-elevated);border-radius:999px;padding:4px;display:inline-flex}.scope-switch button{color:var(--muted);background:0 0;border:0;border-radius:999px;padding:6px 10px}.scope-switch button.is-active{background:color-mix(in 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var(--surface-elevated))}.social-actions{margin-top:var(--space-3);gap:var(--space-2);flex-wrap:wrap;display:flex}.share-card-preview{margin-top:var(--space-3);border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface-elevated);width:min(100%,560px);box-shadow:var(--panel-shadow);display:block}.challenge-history{margin:var(--space-3) 0 0;gap:var(--space-2);padding:0;list-style:none;display:grid}.challenge-history li{gap:var(--space-2);border-radius:var(--radius-xs);border:1px solid var(--border);background:color-mix(in srgb, var(--chip-bg) 70%, #fff);padding:var(--space-2) var(--space-3);box-shadow:var(--panel-shadow-sm);grid-template-columns:1fr auto auto;align-items:center;display:grid}.challenge-history-meta{grid-template-columns:auto auto;align-items:center;gap:2px 10px;display:grid}.challenge-history li span{color:var(--muted)}.challenge-history li strong{text-transform:uppercase;letter-spacing:.03em;color:var(--text-strong);font-size:12px}.challenge-history-meta em,.challenge-history-meta time{color:var(--muted);font-size:12px;font-style:normal}.challenge-history li small{text-transform:capitalize;font-weight:700}.challenge-history-actions{gap:6px;display:inline-flex}.challenge-history-actions button{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-elevated);color:var(--text-strong);padding:4px 8px}.challenge-history li.status-completed{border-color:color-mix(in srgb, var(--success) 44%, var(--border))}.challenge-history li.status-pending{border-color:color-mix(in srgb, var(--primary) 44%, var(--border))}.challenge-history li.status-expired{opacity:.72}.leaderboard-panel ol{margin:var(--space-3) 0 0;gap:var(--space-2);padding:0;list-style:none;display:grid}.leaderboard-panel li{align-items:center;gap:var(--space-2);border-radius:var(--radius-xs);background:var(--chip-bg);padding:var(--space-2) var(--space-3);grid-template-columns:48px 1fr auto;display:grid}.leaderboard-panel li span{color:var(--muted);font-weight:700}.leaderboard-panel li strong{color:var(--text-strong)}.leaderboard-panel li small{color:var(--muted)}.leaderboard-empty{margin:var(--space-3) 0 0;color:var(--muted)}.achievements-panel ul{margin:var(--space-3) 0 0;gap:var(--space-2);grid-template-columns:repeat(2,minmax(0,1fr));padding:0;list-style:none;display:grid}.achievements-panel li{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-elevated);padding:var(--space-2) var(--space-3);box-shadow:var(--panel-shadow-sm);gap:4px;display:grid}.achievements-panel li span{color:var(--muted);font-size:13px}.achievements-panel li.unlocked{border-color:color-mix(in srgb, var(--success) 40%, var(--border));background:color-mix(in srgb, var(--success) 9%, var(--surface-elevated))}.achievements-panel li.locked{opacity:.7}.achievement-toast{z-index:30;border-radius:var(--radius-sm);border:1px solid color-mix(in srgb, var(--success) 42%, var(--border));background:color-mix(in srgb, var(--success) 10%, var(--surface-elevated));max-width:360px;box-shadow:var(--panel-shadow);padding:var(--space-3);animation:toast-enter var(--motion-medium) var(--ease-standard);gap:6px;display:grid;position:fixed;bottom:16px;right:16px}.achievement-toast-title{color:var(--muted);letter-spacing:.06em;text-transform:uppercase;margin:0;font-size:12px}.achievement-toast strong{color:var(--text-strong)}.achievement-toast span{color:var(--text)}.achievement-toast button{border:1px solid var(--border);border-radius:var(--radius-xs);background:var(--surface);color:var(--text-strong);justify-self:start;padding:5px 10px}@keyframes toast-enter{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}:root[data-reduce-motion=on] .achievement-toast{animation:none}.tutorial-callout{margin-top:var(--space-3);padding:var(--space-3);border-radius:var(--radius-sm);border:1px solid color-mix(in srgb, var(--primary) 22%, var(--border));background:color-mix(in srgb, var(--primary) 7%, var(--surface-elevated));gap:6px;display:grid}.tutorial-callout strong{color:var(--text-strong);font-size:15px}.tutorial-callout span{color:var(--muted)}.tutorial-cheatsheet{margin:var(--space-3) 0 0;color:var(--muted);gap:6px;padding:0 0 0 18px;display:grid}.tutorial-cheatsheet li{line-height:1.35}.shortcut-row p{margin:0}.tutorial-overlay{background:color-mix(in srgb, var(--text-strong) 22%, transparent);padding:var(--space-4);z-index:20;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);place-items:center;display:grid;position:fixed;inset:0}.tutorial-card{background:var(--surface-elevated);border:1px solid var(--border);border-radius:var(--radius-lg);width:min(520px,100%);box-shadow:var(--panel-shadow);padding:var(--space-6)}.tutorial-step{color:var(--muted);letter-spacing:.05em;text-transform:uppercase;margin:0 0 6px;font-size:13px}.tutorial-card h3{color:var(--text-strong);font-family:var(--display-font);margin:0}.tutorial-card p{color:var(--text)}.tutorial-actions{margin-top:var(--space-4);justify-content:flex-end;gap:var(--space-2);display:flex}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.settings-grid{gap:var(--space-3);grid-template-columns:repeat(5,minmax(0,1fr));display:grid}.settings-grid label{color:var(--text);align-items:start;gap:6px;font-weight:700;display:grid}.settings-grid button{padding:var(--space-2) var(--space-3);align-self:end;margin:0}.settings-grid select{border:1px solid var(--border);background:var(--surface-elevated);color:var(--text-strong);border-radius:var(--radius-sm);padding:var(--space-2) var(--space-3);box-shadow:var(--panel-shadow-sm);transition:border-color var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard)}.settings-grid select:focus-visible{border-color:var(--focus);box-shadow:0 0 0 4px color-mix(in srgb, var(--focus) 16%, transparent);outline:none}.switch{align-items:center;gap:10px;min-height:40px;display:flex}.switch input{block-size:18px;inline-size:18px;accent-color:var(--primary)}.ghost{border-radius:var(--radius-sm);color:var(--primary);padding:var(--space-2) var(--space-3);cursor:pointer;box-shadow:none;background:0 0;border:1px solid #0000}.ghost:hover{background:var(--primary-soft);color:var(--primary-hover)}:root[data-theme=dark] .ghost:hover{background:color-mix(in srgb, var(--primary) 20%, transparent);color:var(--primary)}.board-wrap{gap:var(--space-2);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:var(--space-5);box-shadow:var(--panel-shadow);transition:transform var(--motion-base) var(--ease-standard), box-shadow var(--motion-base) var(--ease-standard);order:3;display:grid;overflow:auto}.connector-list{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:var(--space-5);box-shadow:var(--panel-shadow);transition:transform var(--motion-base) var(--ease-standard), box-shadow var(--motion-base) var(--ease-standard);order:4}.board-wrap.solved{border-color:color-mix(in srgb, var(--primary) 38%, var(--border));box-shadow:0 0 0 1px color-mix(in srgb, var(--primary) 20%, transparent), 0 16px 48px #0f172a1f, 0 0 0 6px color-mix(in srgb, var(--primary) 7%, transparent);background:radial-gradient(700px 220px at 20% 0%, color-mix(in srgb, var(--primary) 8%, transparent), transparent 65%), radial-gradient(700px 220px at 80% 100%, color-mix(in srgb, var(--secondary) 8%, transparent), transparent 65%), var(--surface)}.board-actions{align-items:center}.board-canvas{position:relative}.line-layer{pointer-events:none;width:100%;height:100%;position:absolute;inset:0}.connector-path{fill:none;stroke-width:4px;stroke-linecap:round;opacity:.95}.connector-path.active{stroke-dasharray:7 7}.connector-path.clue-hint{stroke-dasharray:5 5;opacity:.8}:root[data-theme=dark] .connector-path{stroke-width:4.6px;opacity:1}:root[data-theme=dark] .connector-path.clue-hint{opacity:.94}.board-grid{grid-template-columns:1fr auto;gap:28px;min-width:760px;display:grid;position:relative}.columns{grid-template-columns:repeat(4,minmax(130px,1fr));gap:18px;display:grid}.column{gap:12px;display:grid}.column-label{color:var(--muted);letter-spacing:.03em;text-align:center;margin:0;font-weight:700}.node{--connector-color:transparent;border:1px solid color-mix(in srgb, var(--border) 82%, #fff);background:var(--surface-elevated);width:56px;height:56px;min-height:56px;color:var(--text-strong);cursor:pointer;transition:transform var(--motion-fast) var(--ease-standard), border-color var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard);box-shadow:var(--panel-shadow-sm);border-radius:50%;justify-self:center;place-items:center;padding:0;font-size:20px;font-weight:800;display:grid}.node.hovered,.node:hover{border-color:color-mix(in srgb, var(--primary) 45%, var(--border));box-shadow:var(--panel-shadow);transform:translateY(-2px)}.node.selected{border-color:var(--primary);background:color-mix(in srgb, var(--primary) 22%, var(--surface-elevated));box-shadow:0 0 0 3px color-mix(in srgb, var(--primary) 26%, transparent)}.node.connector-used{border-color:color-mix(in srgb, var(--connector-color) 74%, #d0d7e0);box-shadow:inset 0 0 0 2px color-mix(in srgb, var(--connector-color) 52%, transparent), 0 0 0 1px color-mix(in srgb, var(--connector-color) 18%, transparent)}.node.locked{background:color-mix(in srgb, var(--connector-color) 18%, #fff)}:root[data-theme=dark] .node{border-color:color-mix(in srgb, var(--border) 78%, #fff)}:root[data-theme=dark] .node.locked{background:color-mix(in srgb, var(--connector-color) 30%, var(--surface-elevated))}.targets{align-content:start;gap:12px;min-width:190px;display:grid}.target-row{grid-template-columns:24px 1fr;align-items:center;gap:8px;display:grid}.equal-sign{color:var(--muted);text-align:center;font-weight:800}.target{border-radius:var(--radius-xs);border:1px solid var(--border);background:var(--surface-elevated);height:56px;min-height:56px;box-shadow:var(--panel-shadow-sm);place-items:center;font-size:20px;font-weight:800;display:grid}:root[data-theme=dark] .target{border-color:color-mix(in srgb, var(--border) 80%, #fff)}.celebration-layer{pointer-events:none;z-index:60;position:fixed;inset:0;overflow:hidden}.confetti-piece{top:-12px;left:var(--confetti-left);background:var(--confetti-color);opacity:.96;width:10px;height:16px;transform:translate3d(0, 0, 0) rotate(var(--confetti-rotation)) scale(var(--confetti-scale));animation:confetti-fall var(--confetti-duration) var(--confetti-delay) cubic-bezier(.2, .75, .2, 1) forwards;box-shadow:0 0 12px color-mix(in srgb, var(--confetti-color) 30%, transparent);border-radius:4px;position:absolute}@keyframes confetti-fall{0%{opacity:0;transform:translate3d(0, -10px, 0) rotate(var(--confetti-rotation)) scale(var(--confetti-scale))}10%{opacity:1}to{opacity:0;transform:translate3d(var(--confetti-drift), 110vh, 0) rotate(calc(var(--confetti-rotation) + 720deg)) scale(var(--confetti-scale))}}.target.claimed{border-color:var(--success);background:color-mix(in srgb, var(--success) 12%, var(--surface-elevated));color:var(--text-strong)}.connector-list h2{font-family:var(--display-font);color:var(--text-strong);margin:0 0 14px}.connector-list ul{gap:8px;margin:0;padding:0;list-style:none;display:grid}.connector-chip{border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface-elevated);box-shadow:var(--panel-shadow-sm);justify-content:space-between;align-items:center;gap:12px;padding:12px;display:flex}.connector-summary{white-space:nowrap;flex-wrap:nowrap;align-items:baseline;gap:6px;min-width:0;display:inline-flex}.connector-values{white-space:nowrap}.connector-chip span,.connector-chip small{color:var(--muted);display:block}.connector-chip .connector-total{white-space:nowrap;display:inline-flex}.connector-chip.invalid{border-color:color-mix(in srgb, var(--danger) 38%, var(--border));background:color-mix(in srgb, var(--danger) 6%, var(--surface-elevated))}.connector-chip.valid,.connector-chip.clue{border-color:color-mix(in srgb, var(--success) 35%, var(--border));background:color-mix(in srgb, var(--success) 6%, var(--surface-elevated))}.connector-chip button{border-color:color-mix(in srgb, var(--danger) 32%, transparent);background:color-mix(in srgb, var(--danger) 92%, #dc2626);color:#fff;box-shadow:0 8px 20px #ef444438}.connector-chip button:hover{background:#dc2626;border-color:#0000}.empty{color:var(--muted);margin:8px 0 2px}@media (width<=960px){.top-bar{-webkit-backdrop-filter:none;backdrop-filter:none;flex-direction:column;position:static}.meta-panel{grid-template-columns:repeat(3,minmax(0,1fr));width:100%;min-width:0}.settings-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.achievements-panel ul{grid-template-columns:1fr}}@media (width<=760px){.app-shell{padding:24px 14px 36px}.top-bar{padding:var(--space-4)}.control-row{align-items:stretch}.board-grid{min-width:620px}.settings-grid,.stats-grid{grid-template-columns:1fr}.achievement-toast{max-width:none;bottom:12px;left:14px;right:14px}}