@font-face{font-family:'PyDebug Sans Fallback';src:local('Arial'),local('Helvetica Neue'),local('Helvetica'),local('Liberation Sans'),local('Noto Sans'),local('Nimbus Sans');size-adjust:107.4%;ascent-override:96.9%;descent-override:24.1%;line-gap-override:0%}@font-face{font-family:'PyDebug Sans Fallback Wide';src:local('DejaVu Sans'),local('Bitstream Vera Sans');size-adjust:92.5%;ascent-override:96.9%;descent-override:24.1%;line-gap-override:0%}@font-face{font-family:'PyDebug Mono Fallback';src:local('DejaVu Sans Mono'),local('Liberation Mono'),local('Menlo'),local('SF Mono'),local('SFMono-Regular'),local('Courier New');size-adjust:100%;ascent-override:102%;descent-override:30%;line-gap-override:0%}@font-face{font-family:'PyDebug Mono Fallback Narrow';src:local('Consolas');size-adjust:109.1%;ascent-override:102%;descent-override:30%;line-gap-override:0%}:root{color-scheme:dark;--bg:#0a0e15;--bg-primary:var(--bg);--bg-main:var(--bg);--bg-surface:#111823;--bg-elevated:#192231;--bg-glass:#111823;--card:var(--bg-surface);--border:rgba(154,172,197,.16);--border-subtle:var(--border);--border-color:var(--border);--text:#edf2fb;--text-primary:var(--text);--text-main:var(--text);--text-muted:#9aaac2;--accent-mint:#5ee0cf;--accent-mint-dim:#277d78;--accent-amber:#f1c66a;--accent-red:#fb7480;--accent-green:#6ddd8a;--primary:var(--accent-mint);--shadow-sm:0 1px 2px rgba(0,0,0,.08),0 4px 12px rgba(0,0,0,.06);--shadow-md:0 4px 12px rgba(0,0,0,.10),0 12px 32px rgba(0,0,0,.12);--shadow-lg:0 8px 24px rgba(0,0,0,.14),0 24px 48px rgba(0,0,0,.18);--ring:0 0 0 3px rgba(94,224,207,.22);--font-display:'Space Grotesk',Inter,'PyDebug Sans Fallback','PyDebug Sans Fallback Wide',sans-serif;--font-body:Inter,'PyDebug Sans Fallback','PyDebug Sans Fallback Wide',system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--font-mono:'JetBrains Mono','PyDebug Mono Fallback','PyDebug Mono Fallback Narrow',ui-monospace,SFMono-Regular,Menlo,monospace;--radius-sm:10px;--radius-md:14px;--radius-lg:20px;--content-max:1120px;--sidebar-w:272px}:root[data-theme='light']{color-scheme:light;--bg:#f4f7fb;--bg-primary:var(--bg);--bg-main:var(--bg);--bg-surface:#ffffff;--bg-elevated:#eef3f9;--bg-glass:#ffffff;--card:var(--bg-surface);--border:rgba(53,74,105,.14);--border-subtle:var(--border);--border-color:var(--border);--text:#172238;--text-primary:var(--text);--text-main:var(--text);--text-muted:#61718a;--accent-mint:#087f77;--accent-mint-dim:#b7e7e1;--accent-amber:#9a6508;--accent-red:#c23d4f;--accent-green:#168343;--primary:var(--accent-mint);--shadow-sm:0 1px 2px rgba(28,46,71,.06),0 4px 12px rgba(28,46,71,.06);--shadow-md:0 4px 12px rgba(28,46,71,.08),0 12px 32px rgba(28,46,71,.10);--shadow-lg:0 8px 24px rgba(28,46,71,.10),0 24px 48px rgba(28,46,71,.12);--ring:0 0 0 3px rgba(8,127,119,.18)}*{box-sizing:border-box}html{background:var(--bg);color:var(--text);scrollbar-gutter:stable;scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{min-width:320px;margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;overflow-x:hidden}body,input,textarea,select,button{font-family:var(--font-body)}body>footer a{display:inline-block;line-height:1.5;padding:5px 0}h1,h2,h3,h4{font-family:var(--font-display);letter-spacing:-.025em;margin:0 0 .5em;line-height:1.2}h1{line-height:1.08;font-weight:700}p{color:var(--text-muted);line-height:1.65;margin:0 0 1em}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{-webkit-tap-highlight-color:transparent;user-select:none}:focus-visible{outline:none;box-shadow:var(--ring);border-radius:6px}.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}.pdg-icon{display:inline-block;vertical-align:-0.125em;flex:0 0 auto}.app-shell{display:flex;min-height:100vh;width:100%;max-width:1440px;margin:0 auto;background:var(--bg)}.sidebar{position:sticky;top:0;width:var(--sidebar-w);flex:0 0 var(--sidebar-w);height:100vh;height:100dvh;display:flex;flex-direction:column;padding:20px 14px 18px;background:var(--bg-surface);border-right:1px solid var(--border);overflow-y:auto;overflow-x:hidden;overscroll-behavior:contain;z-index:20}.sidebar::-webkit-scrollbar{width:4px}.sidebar::-webkit-scrollbar-thumb{background:var(--border);border-radius:999px}.sidebar__logo{display:flex;align-items:center;gap:8px;padding:6px 10px;margin-bottom:24px;color:var(--accent-mint);font:700 1.12rem var(--font-mono);letter-spacing:-.04em}.sidebar__logo::before{content:'>_';color:var(--accent-amber)}.sidebar__section-label{padding:0 10px;margin:20px 0 8px;color:var(--text-muted);font-size:.68rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;opacity:.9}.sidebar__section-label:first-of-type{margin-top:0}.sidebar nav{display:flex;flex-direction:column;gap:2px}.sidebar nav a,.sidebar__account{display:flex;align-items:center;gap:10px}.sidebar nav a{position:relative;padding:11px 12px;border:1px solid transparent;border-radius:10px;color:var(--text-muted);font-size:.90rem;font-weight:600;line-height:1.2;transition:background-color 150ms ease,color 150ms ease,border-color 150ms ease}.sidebar nav a:hover{background:var(--bg-elevated);border-color:var(--border);color:var(--text)}.sidebar nav a.active{background:rgba(94,224,207,.11);border-color:rgba(94,224,207,.22);color:var(--accent-mint)}.sidebar nav a .nav-icon{display:grid;width:20px;place-items:center;flex:0 0 20px}.nav-icon svg,.sidebar__logout-btn svg,.mobile-menu-btn svg{display:block;width:18px;height:18px}.sidebar__account{gap:10px;padding:14px 8px 2px;margin-top:auto;border-top:1px solid var(--border)}.sidebar__avatar{display:grid;width:36px;height:36px;place-items:center;flex:0 0 auto;border-radius:50%;background:linear-gradient(145deg,var(--accent-mint),var(--accent-mint-dim));color:#04201e;font-family:var(--font-display);font-weight:700;font-size:.95rem;box-shadow:0 2px 8px rgba(35,136,128,.20)}.sidebar__account-info{min-width:0;flex:1}.sidebar__account-info .name{overflow:hidden;font-size:.86rem;font-weight:600;text-overflow:ellipsis;white-space:nowrap;color:var(--text)}.sidebar__account-info .plan,.sidebar__logout-btn{color:var(--text-muted);font-size:.73rem}.sidebar__account-info .plan svg{vertical-align:-2px}.sidebar__logout-btn{display:grid;place-items:center;width:32px;height:32px;padding:0;border:0;border-radius:8px;background:transparent;cursor:pointer;transition:background-color 150ms ease,color 150ms ease}.sidebar__logout-btn:hover{color:var(--accent-red);background:rgba(251,116,128,.10)}.sidebar__login-link{display:flex;width:100%;align-items:center;gap:10px}.sidebar__login-link .name{color:var(--accent-mint);font-weight:700}.mobile-menu-btn,.sidebar-overlay{display:none}.main-content{flex:1;min-width:0;width:100%;display:flex;flex-direction:column;align-items:center;padding:36px 32px 72px;background:transparent}.main-content>*{width:100%;max-width:var(--content-max)}.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 18px;border:1px solid transparent;border-radius:10px;cursor:pointer;font-size:.90rem;font-weight:700;line-height:1.1;white-space:nowrap;transition:transform 150ms ease,background-color 150ms ease,border-color 150ms ease,color 150ms ease,box-shadow 150ms ease}.btn:hover{transform:translateY(-1px)}.btn:active{transform:translateY(0)scale(.98)}.btn:disabled{cursor:not-allowed;opacity:.55;transform:none;pointer-events:none}.btn--primary{background:linear-gradient(145deg,#78ebdc,var(--accent-mint));color:#05201e;box-shadow:0 1px 0 rgba(0,0,0,.12),0 6px 16px rgba(42,180,167,.20);border-color:rgba(94,224,207,.22)}:root[data-theme='light'] .btn--primary{background:linear-gradient(145deg,#1f7f72,var(--accent-mint));color:#fff}.btn--primary:hover{box-shadow:0 2px 0 rgba(0,0,0,.10),0 10px 24px rgba(42,180,167,.28)}.btn--secondary{background:var(--bg-surface);border-color:var(--border);color:var(--text)}.btn--secondary:hover{border-color:rgba(94,224,207,.32);background:var(--bg-elevated);color:var(--text)}.btn--github{background:#24292e;border-color:rgba(255,255,255,.14);color:#fff;box-shadow:0 1px 0 rgba(0,0,0,.18),0 6px 16px rgba(0,0,0,.18)}.btn--github:hover{background:#2f363d}.btn--github svg{flex-shrink:0}.btn--full{width:100%}.btn--sm{min-height:36px;padding:0 12px;font-size:.82rem;border-radius:8px}.btn--hero{min-height:52px;padding:0 26px;border-radius:12px;font-size:1rem}.auth-social-buttons{display:flex;flex-direction:column;gap:12px}.tap-ripple{position:absolute;display:block;pointer-events:none;border-radius:999px;background:currentColor;opacity:.16;transform:scale(0);animation:tap-ripple 480ms ease-out forwards}@keyframes tap-ripple{to { opacity: 0; transform: scale(1); }}.theme-toggle{display:inline-grid;width:40px;height:40px;place-items:center;border:1px solid var(--border);border-radius:10px;background:var(--bg-surface);color:var(--text);box-shadow:var(--shadow-sm);cursor:pointer;transition:transform 160ms ease}.theme-toggle:hover{transform:translateY(-1px);border-color:rgba(94,224,207,.28)}.theme-toggle:active{transform:translateY(0)scale(.96)}.theme-toggle__icon{font-size:1.1rem;line-height:1}.theme-toggle__icon svg{display:block;width:18px;height:18px}.pdg-theme-switching,.pdg-theme-switching *,.pdg-theme-switching *::before,.pdg-theme-switching *::after{transition:none !important}.theme-toggle--floating{position:fixed;z-index:20;top:18px;right:18px}.sidebar__account-info .name:empty::before,.sidebar__account-info .plan:empty::before,#profile-name:empty::before,#profile-email:empty::before,#profile-xp:empty::before,#profile-streak:empty::before,#profile-plan-tag:empty::before{display:inline-block;width:46%;height:.72em;border-radius:5px;background:var(--bg-elevated);content:'';vertical-align:.04em}.sidebar__account-info .name:empty::before{width:70%;height:.66em}.sidebar__account-info .plan:empty::before{width:46%;height:.6em}#profile-name:empty::before{width:150px;height:.74em}#profile-email:empty::before{width:210px;height:.6em}#profile-xp:empty::before,#profile-streak:empty::before{width:2.1ch;height:.68em;background:var(--accent-mint-dim,var(--bg-elevated));opacity:.45}#profile-plan-tag:empty{background:var(--bg-elevated)}#profile-plan-tag:empty::before{width:54px;height:.58em;background:rgba(154,172,197,.25)}.card-container,.settings-wrapper,.section-card,.stat-card,.feature-card,.profile-header-card,.plan-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-sm);transition:border-color 180ms ease,transform 180ms ease,box-shadow 180ms ease}.section-card:hover,.stat-card:hover,.feature-card:hover{border-color:rgba(94,224,207,.22);box-shadow:var(--shadow-md)}.tag{display:inline-flex;align-items:center;min-height:24px;padding:2px 10px;border-radius:999px;font-size:.70rem;font-weight:700;letter-spacing:.02em;text-transform:uppercase;border:1px solid transparent}.tag--bug{background:rgba(251,116,128,.10);color:var(--accent-red);border-color:rgba(251,116,128,.14)}.tag--question{background:rgba(94,224,207,.10);color:var(--accent-mint);border-color:rgba(94,224,207,.14)}.tag--free{background:rgba(109,221,138,.10);color:var(--accent-green);border-color:rgba(109,221,138,.14)}.tag--premium{background:rgba(241,198,106,.12);color:var(--accent-amber);border-color:rgba(241,198,106,.18)}:root[data-theme='light'] .tag--free{color:#12713b}.diff{font-size:.78rem;font-weight:700;text-transform:capitalize}.diff--easy{color:var(--accent-green)}.diff--medium{color:var(--accent-amber)}.diff--hard{color:var(--accent-red)}.badge{display:inline-flex;align-items:center;gap:6px;min-height:30px;padding:4px 12px;border-radius:999px;font-size:.78rem;font-weight:700;border:1px solid var(--border)}.badge svg{display:block;flex:0 0 auto}.badge--free{background:var(--bg-elevated);color:var(--text-muted)}.badge--premium{background:rgba(94,224,207,.10);color:var(--accent-mint);border-color:rgba(94,224,207,.18)}.field{margin-bottom:16px}.field label{display:block;margin-bottom:6px;color:var(--text-muted);font-size:.84rem;font-weight:600}.field input,.field textarea,select,#answer-section textarea,.guest-name-modal__box input{width:100%;border:1px solid var(--border);border-radius:10px;background:var(--bg-elevated);color:var(--text);padding:11px 12px;font-size:.92rem;transition:border-color 150ms ease,box-shadow 150ms ease}.field input:focus,.field textarea:focus,select:focus,#answer-section textarea:focus,.guest-name-modal__box input:focus{border-color:var(--accent-mint);box-shadow:var(--ring);outline:0;background:var(--bg-surface)}.auth-page{display:grid;min-height:100vh;place-items:center;padding:24px 20px;background:var(--bg)}.auth-card{width:min(100%,420px);padding:32px 28px;border:1px solid var(--border);border-radius:20px;background:var(--bg-surface);box-shadow:var(--shadow-lg)}.auth-card h1{font-size:1.55rem}.auth-card .subtitle{margin-bottom:22px;color:var(--text-muted)}.auth-switch{margin-top:18px;color:var(--text-muted);font-size:.88rem;text-align:center}.auth-switch a{color:var(--accent-mint);font-weight:700;line-height:1.5;padding:3px 0}.auth-divider{display:flex;align-items:center;gap:12px;margin:18px 0;color:var(--text-muted);font-size:.8rem}.auth-divider::before,.auth-divider::after{height:1px;flex:1;background:var(--border);content:''}.password-field{position:relative;display:flex;align-items:center}.password-field input{padding-right:64px}.password-toggle-btn{position:absolute;right:6px;border:0;background:transparent;color:var(--accent-mint);cursor:pointer;font-size:.78rem;font-weight:700;display:inline-flex;align-items:center;justify-content:center;padding:6px 10px;min-height:28px;border-radius:6px}.password-toggle-btn:hover{background:rgba(94,224,207,.10)}.app-toast{position:fixed;right:20px;bottom:20px;z-index:9999;max-width:min(380px,calc(100vw - 32px));padding:14px 16px;border:1px solid var(--border);border-radius:12px;background:var(--bg-surface);color:var(--text);box-shadow:var(--shadow-lg);opacity:0;transform:translateY(10px);transition:transform 200ms ease,opacity 200ms ease}.app-toast.show{opacity:1;transform:translateY(0)}.app-toast--success{border-color:rgba(109,221,138,.35)}.app-toast--error{border-color:rgba(251,116,128,.35)}.landing-nav{position:fixed;z-index:30;top:0;left:0;right:0;display:flex;align-items:center;justify-content:space-between;width:100%;max-width:1200px;padding:18px 24px;margin:0 auto;background:transparent}.landing-nav__brand{color:var(--accent-mint);font:700 1.15rem var(--font-mono);letter-spacing:-.03em}.landing-nav__brand::before{content:'>_ ';color:var(--accent-amber)}.landing-nav__actions{display:flex;align-items:center;gap:18px}.landing-nav__login{color:var(--text-muted);font-size:.88rem;font-weight:600;transition:color 150ms ease}.landing-nav__login:hover{color:var(--text)}.landing-hero{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:84vh;min-height:84dvh;padding:128px 24px 80px;text-align:center;background:var(--bg);overflow:hidden;isolation:isolate}.landing-hero::before,.landing-hero::after{position:absolute;z-index:-1;box-sizing:border-box;width:32rem;height:32rem;content:'';border-radius:50%;opacity:.55;pointer-events:none;contain:paint;transform:translate3d(0,0,0);backface-visibility:hidden;will-change:transform,opacity;transition:opacity 160ms ease}.landing-hero::before{top:12%;left:-16rem;background:radial-gradient(circle,rgba(94,224,207,.14),transparent 62%)}.landing-hero::after{right:-14rem;bottom:-12rem;background:radial-gradient(circle,rgba(103,135,255,.10),transparent 62%)}.landing-hero__content{width:min(100%,760px);margin:0 auto}.landing-hero__eyebrow,.eyebrow{margin:0 0 14px;color:var(--accent-mint);font-family:var(--font-mono);font-size:.78rem;font-weight:700;line-height:1.4;letter-spacing:.06em;text-transform:uppercase}.landing-hero h1{max-width:760px;margin:0 auto 18px;font-size:clamp(2.2rem,5vw,3.8rem);font-weight:700;line-height:1.08;letter-spacing:-.03em}.landing-hero p.lead{max-width:600px;margin:0 auto 32px;font-size:clamp(1rem,1.8vw,1.1rem);color:var(--text-muted);line-height:1.6}.landing-cta{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.landing-cta__secondary{display:inline-block;margin-top:16px;color:var(--text-muted);font-size:.88rem;line-height:1.4}.landing-cta__secondary:hover{color:var(--accent-mint)}.hero-code-prism{width:min(100%,560px);margin:48px auto 0}.landing-terminal{min-height:calc(9.96em + 45px);padding:20px 22px;overflow:hidden;border:1px solid var(--border);border-radius:14px;background:#121a27;color:#dfeaf8;font-family:var(--font-mono);font-size:clamp(.72rem,1.8vw,.87rem);line-height:1.66;text-align:left;box-shadow:var(--shadow-md)}:root[data-theme='light'] .landing-terminal{background:#162032;color:#dfeaf8}.landing-terminal .line-error{margin-top:3px;color:#ff9ca3}.landing-terminal .cursor{display:inline-block;width:8px;height:14px;margin-left:3px;background:var(--accent-mint);vertical-align:-2px;animation:blink 1s step-end infinite}@keyframes blink{50% { opacity: 0; }}h1{line-height:1.08}p{color:var(--text-muted);line-height:1.62}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;width:min(calc(100% - 48px),var(--content-max));margin:72px auto}.feature-card{padding:24px 20px;border-radius:16px}.feature-card:hover{transform:translateY(-2px)}.feature-card .icon{margin-bottom:14px;color:var(--accent-mint)}.feature-card .icon svg{width:40px;height:40px}.feature-card h3{margin-bottom:8px;font-size:1.05rem}.feature-card p{margin:0;font-size:.90rem;line-height:1.6}#community-proof-sentinel{height:1px;margin-top:-1px;pointer-events:none}.community-proof{display:grid;grid-template-columns:repeat(3,1fr);width:min(calc(100% - 48px),960px);margin:0 auto 72px;overflow:hidden;border:1px solid var(--border);border-radius:16px;background:var(--bg-surface);box-shadow:var(--shadow-sm)}.community-proof[hidden]{display:none}.community-proof__item{display:grid;place-items:center;min-height:104px;padding:20px;text-align:center}.community-proof__item+.community-proof__item{border-left:1px solid var(--border)}.community-proof__value{display:block;color:var(--accent-mint);font-family:var(--font-display);font-size:1.8rem;font-weight:700}.community-proof__label{margin-top:4px;color:var(--text-muted);font-size:.82rem;font-weight:600}.habit-section{padding:80px 24px;border-block:1px solid var(--border);background:var(--bg-surface)}.habit-section__inner{max-width:700px;margin:0 auto;text-align:center}.habit-section h2{font-size:clamp(1.6rem,3vw,2.1rem);margin-bottom:12px}.habit-section p{margin-bottom:28px;max-width:600px;margin-inline:auto}.habit-stats{display:flex;justify-content:center;gap:24px;flex-wrap:wrap;color:var(--text);font-size:.90rem;font-weight:600}.habit-stats div{display:flex;align-items:center;gap:8px}.habit-stats span{color:var(--accent-amber);display:grid;place-items:center}.premium-teaser{padding:80px 24px;text-align:center;background:var(--bg)}.premium-teaser__inner{max-width:560px;margin:0 auto}.premium-teaser h2{color:var(--accent-amber);font-size:1.9rem;margin-bottom:10px}.guest-name-modal{position:fixed;z-index:1200;inset:0;display:none;align-items:center;justify-content:center;padding:20px;background:rgba(4,9,16,.60)}.guest-name-modal.open{display:flex}.guest-name-modal__box{width:min(100%,380px);padding:28px 24px;border:1px solid var(--border);border-radius:20px;background:var(--bg-surface);box-shadow:var(--shadow-lg);text-align:center}.guest-name-modal__box p{font-size:.88rem}.daily-challenge{display:flex;align-items:center;gap:16px;min-height:92px;margin:0 0 24px;padding:17px 20px;overflow:hidden;border:1px solid rgba(241,198,106,.27);border-radius:var(--radius-md);background:linear-gradient(115deg,rgba(241,198,106,.15),rgba(94,224,207,.08)65%,var(--bg-surface));box-shadow:var(--shadow-sm)}.daily-challenge__spark{display:grid;width:38px;height:38px;place-items:center;flex:0 0 auto;border-radius:12px;background:rgba(241,198,106,.19);color:var(--accent-amber);font-size:1.25rem}.daily-challenge__content{display:grid;min-width:0;flex:1;align-content:center;row-gap:3px;min-height:3.7em}.daily-challenge__content .eyebrow{margin:0;color:var(--accent-amber);font-size:.66rem}.daily-challenge__content h2{overflow:hidden;margin:0;font-size:1rem;line-height:1.3;text-overflow:ellipsis;white-space:nowrap}.daily-challenge__content p:not(.eyebrow){margin:0;font-size:.79rem}.daily-challenge__content .daily-challenge__sub{min-height:1.35em}.daily-challenge__cta{flex:0 0 auto;white-space:nowrap}.daily-challenge--loading .daily-challenge__title{position:relative;overflow:hidden;color:transparent;border-radius:6px;background:rgba(241,198,106,.10)}.daily-challenge--loading .daily-challenge__sub{position:relative;overflow:hidden;border-radius:6px;background:rgba(154,172,197,.08)}.daily-challenge--loading .daily-challenge__title::after,.daily-challenge--loading .daily-challenge__sub::after{position:absolute;inset:0;content:'';animation:dc-shimmer 1.4s ease infinite}.daily-challenge--loading .daily-challenge__title::after{background:linear-gradient(90deg,transparent 25%,rgba(241,198,106,.14)37%,transparent 63%)}.daily-challenge--loading .daily-challenge__sub::after{background:linear-gradient(90deg,transparent 25%,rgba(154,172,197,.12)37%,transparent 63%)}@keyframes dc-shimmer{0% { transform: translate3d(-100%,0,0); } 100% { transform: translate3d(100%,0,0); }}.celebration-canvas{position:fixed;z-index:10000;inset:0;width:100vw;height:100vh;pointer-events:none}:root[data-theme='light'] .CodeMirror{background:#f9fbfd;color:#1d2b3d}:root[data-theme='light'] .CodeMirror-gutters{border-color:#dbe3ee;background:#f0f4f8}:root[data-theme='light'] .CodeMirror-linenumber{color:#566680}:root[data-theme='light'] #code-output{color:#172238}:root[data-theme='light'] .run-modal{background:#f4f7fb}.ad-slot[data-ad-placement]{display:grid;width:100%;min-height:250px;place-items:center;contain:layout paint;contain-intrinsic-size:auto 250px;overflow:hidden;margin:24px auto;border:1px solid var(--border);border-radius:14px;background:var(--bg-surface);text-align:center}.ad-slot[data-ad-placement][hidden]{display:none}.ad-slot__label{color:var(--text-muted);font-size:.70rem;letter-spacing:.08em;text-transform:uppercase}.ad-slot[data-ad-state='rendered']{align-items:stretch}.ad-slot .adsbygoogle{min-height:250px}.playground-progress-track{position:absolute;top:calc(100% + 6px);left:16px;right:16px;z-index:5;display:flex;align-items:center;gap:8px}.playground-progress-track[hidden]{display:none}.playground-progress-bar{position:relative;flex:1;height:6px;overflow:hidden;border-radius:999px;background:var(--bg-elevated)}.playground-progress-fill{width:100%;transform:scaleX(0);transform-origin:left center;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--accent-mint-dim),var(--accent-mint));transition:transform .25s ease}.playground-progress-pct{flex:0 0 auto;min-width:38px;color:var(--text-muted);font-size:.72rem;font-weight:700;text-align:right;font-variant-numeric:tabular-nums}.seo-faq{max-width:900px;margin-inline:auto;color:var(--text-muted)}.seo-faq h2{margin:0 0 10px;color:var(--text);font-size:clamp(1.2rem,2.4vw,1.45rem)}.seo-faq>p{margin:0 0 6px;font-size:.94rem}.seo-faq h3{margin:22px 0 6px;color:var(--text);font-size:.99rem;line-height:1.35}.seo-faq p{margin:0;font-size:.90rem;line-height:1.65}.seo-faq code{padding:1px 6px;border-radius:6px;background:var(--bg-elevated);color:var(--accent-mint);font-family:var(--font-mono);font-size:.84em}.seo-faq a{color:var(--accent-mint)}.seo-faq a:hover{text-decoration:underline}.pd-avatar{position:relative;display:inline-grid;place-items:center;width:var(--pd-avatar-size,44px);height:var(--pd-avatar-size,44px);flex:0 0 auto;overflow:hidden;border:1px solid var(--border);border-radius:50%;background:linear-gradient(145deg,var(--accent-mint),var(--accent-mint-dim));color:#04201e;font-family:var(--font-display);font-weight:700;font-size:calc(var(--pd-avatar-size,44px)* .38);line-height:1}.pd-avatar img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}.pd-avatar__initial{position:absolute;inset:0;display:grid;place-items:center}.pd-online-dot{display:inline-block;width:10px;height:10px;margin-left:6px;border:2px solid var(--bg);border-radius:50%;background:var(--accent-green);box-shadow:0 0 0 2px rgba(109,221,138,.20);vertical-align:middle}.pd-invite-btn{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border:1px solid var(--border);border-radius:999px;background:var(--bg-elevated);color:var(--text);font:inherit;font-size:.80rem;font-weight:700;cursor:pointer;transition:border-color 150ms ease,background-color 150ms ease,color 150ms ease}.pd-invite-btn--ready{border-color:rgba(94,224,207,.35);background:rgba(94,224,207,.10);color:var(--accent-mint)}.pd-invite-btn--ready:hover{background:rgba(94,224,207,.16)}.pd-invite-btn--off,.pd-invite-btn[disabled]{opacity:.5;cursor:not-allowed}.pd-invite-btn.is-busy{opacity:.7}.pd-battle-modal{position:fixed;z-index:10000;inset:0;display:grid;place-items:center;padding:20px;background:rgba(4,8,14,.62);animation:pd-battle-fade 160ms ease}.pd-battle-modal__card{width:min(440px,100%);padding:24px;border:1px solid var(--border);border-radius:16px;background:var(--bg-surface);box-shadow:var(--shadow-lg)}.pd-battle-modal--incoming .pd-battle-modal__card{border-color:rgba(94,224,207,.32)}.pd-battle-modal__eyebrow{margin:0 0 10px;color:var(--accent-mint);font-size:.72rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.pd-battle-modal__who{display:flex;align-items:center;gap:12px}.pd-battle-modal__who strong{font-size:1rem}.pd-battle-modal__meta{margin:4px 0 0;color:var(--text-muted);font-size:.82rem;line-height:1.55}.pd-battle-modal__timer{margin:14px 0 0;color:var(--text-muted);font-size:.82rem}.pd-battle-modal__timer strong{color:var(--text);font-variant-numeric:tabular-nums}.pd-battle-modal__actions{display:grid;gap:8px;margin-top:16px}@keyframes pd-battle-fade{from { opacity: 0; } to { opacity: 1; }}.pd-player,.pd-invite-card,.pd-history{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--border)}.pd-player:last-child,.pd-invite-card:last-child,.pd-history:last-child{border-bottom:0}.pd-player__avatar{display:inline-flex;flex:0 0 auto}.pd-player__name{display:flex;flex:1;align-items:center;gap:4px;min-width:0;font-weight:600}.pd-player__name small{display:block;color:var(--text-muted);font-size:.74rem;font-weight:500}.pd-player__plan{padding:2px 8px;border:1px solid rgba(241,198,106,.35);border-radius:999px;color:var(--accent-amber);font-size:.64rem;font-weight:800}.pd-history{font-size:.86rem}.pd-history__score{color:var(--text-muted);font-family:var(--font-mono)}.pd-history--empty{justify-content:center;color:var(--text-muted);font-size:.84rem}.pd-result{padding:2px 10px;border-radius:999px;font-size:.70rem;font-weight:800}.pd-result--win{background:rgba(109,221,138,.14);color:var(--accent-green)}.pd-result--loss{background:rgba(251,116,128,.14);color:var(--accent-red)}.pd-result--draw{background:rgba(241,198,106,.14);color:var(--accent-amber)}.pd-stat{display:flex;flex-direction:column;gap:2px;padding:14px 16px;border:1px solid var(--border);border-radius:12px;background:var(--bg-elevated)}.pd-stat strong{font-family:var(--font-display);font-size:1.3rem}.pd-stat span{color:var(--text-muted);font-size:.74rem}.pd-stat-hint{display:block;margin-top:2px;color:var(--text-muted);font-size:.68rem}.pd-records{display:flex;flex-wrap:wrap;gap:10px}.pd-question__meta{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}.pd-chip{padding:3px 10px;border:1px solid var(--border);border-radius:999px;background:var(--bg-elevated);color:var(--text-muted);font-size:.70rem;font-weight:700}.pd-chip--topic{color:var(--accent-mint)}.pd-chip--easy{color:var(--accent-green)}.pd-chip--medium{color:var(--accent-amber)}.pd-chip--hard{color:var(--accent-red)}.pd-question__prompt{margin:0 0 10px;font-size:.95rem;line-height:1.6}.pd-question__code{margin:0 0 12px;padding:14px 16px;overflow-x:auto;border:1px solid var(--border);border-radius:10px;background:#0b1019;color:var(--text);font:13px/1.6 var(--font-mono);tab-size:4}.pd-question__ask{margin:0 0 10px;color:var(--text-muted);font-size:.82rem;font-weight:700}.pd-question--done{text-align:center}.pd-question--done p{margin:8px 0 0;color:var(--text-muted);font-size:.88rem}.pd-options{display:grid;gap:10px}.pd-option{display:flex;align-items:center;gap:12px;width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:10px;background:var(--bg-elevated);color:var(--text);font:inherit;text-align:left;cursor:pointer;transition:border-color 140ms ease,background-color 140ms ease,transform 140ms ease}.pd-option code{font:13.5px/1.5 var(--font-mono)}.pd-option__key{display:grid;width:24px;height:24px;flex:0 0 auto;place-items:center;border:1px solid var(--border);border-radius:8px;color:var(--text-muted);font-size:.74rem;font-weight:800}.pd-option:not([disabled]):hover{border-color:var(--accent-mint);background:rgba(94,224,207,.08);transform:translateY(-1px)}.pd-option--correct{border-color:rgba(109,221,138,.6);background:rgba(109,221,138,.12)}.pd-option--wrong{border-color:rgba(251,116,128,.6);background:rgba(251,116,128,.10)}.pd-option--dim{opacity:.55}.pd-scoreboard{display:flex;align-items:center;gap:14px}.pd-scoreboard__side{display:flex;flex:1;align-items:center;gap:10px;min-width:0}.pd-scoreboard__side--right{flex-direction:row-reverse;text-align:right}.pd-scoreboard__name{overflow:hidden;font-weight:700;text-overflow:ellipsis;white-space:nowrap}.pd-scoreboard__score{font-family:var(--font-display);font-size:1.7rem;font-variant-numeric:tabular-nums}.pd-scoreboard__vs{color:var(--text-muted);font-size:.74rem;font-weight:800;letter-spacing:.1em}.pd-timer{height:8px;margin:14px 0 4px;overflow:hidden;border-radius:999px;background:var(--bg-elevated)}.pd-timer__fill{height:100%;width:100%;border-radius:inherit;background:linear-gradient(90deg,var(--accent-mint),var(--accent-green));transform-origin:left;transition:transform 250ms linear}.pd-timer__fill.is-low{background:linear-gradient(90deg,var(--accent-amber),var(--accent-red))}.pd-result-card{padding:26px;border:1px solid var(--border);border-radius:16px;background:var(--bg-surface);text-align:center;box-shadow:var(--shadow-sm)}.pd-result-card--win{border-color:rgba(109,221,138,.35)}.pd-result-card--loss{border-color:rgba(251,116,128,.30)}.pd-result-card--draw{border-color:rgba(241,198,106,.35)}.pd-result-card__eyebrow{margin:0 0 6px;color:var(--text-muted);font-size:.72rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase}.pd-result-card h2{margin:0 0 6px;font-family:var(--font-display)}.pd-result-card__score{margin:0;font-family:var(--font-display);font-size:2rem}.pd-result-card__score span{display:block;color:var(--text-muted);font-family:var(--font-body);font-size:.82rem;font-weight:500}.pd-result-card__sub{margin:10px 0 0;color:var(--text-muted);font-size:.88rem}.pd-result-card__actions{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:18px}.pd-public__head{display:flex;flex-wrap:wrap;align-items:center;gap:16px}.pd-public__who{flex:1;min-width:200px}.pd-public__who h2{display:flex;align-items:center;gap:4px;margin:0 0 6px;font-family:var(--font-display)}.pd-public__tags{display:flex;flex-wrap:wrap;gap:8px}.pd-public__hint{margin:8px 0 0;color:var(--text-muted);font-size:.8rem;line-height:1.6}.pd-public__hint a{color:var(--accent-mint)}.pd-public__actions{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.pd-public__stats{margin:20px 0 0}.pd-public__battle{margin-top:18px;padding-top:16px;border-top:1px solid var(--border)}.pd-public__eyebrow{display:flex;align-items:center;gap:7px;margin:0 0 6px;color:var(--text-muted);font-size:.74rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.pd-public__record{margin:0;font-size:.95rem}.pd-public__record strong{color:var(--accent-green)}.pd-photo{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.pd-photo__actions{display:flex;flex-direction:column;gap:8px}.pd-photo__input{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.pd-photo__label{cursor:pointer}.pd-switch-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 0;border-bottom:1px solid var(--border)}.pd-switch-row:last-child{border-bottom:0}.pd-switch-row__text{font-size:.9rem}.pd-switch-row__text small{display:block;margin-top:3px;color:var(--text-muted);font-size:.78rem}.pd-switch{position:relative;width:46px;height:26px;flex:0 0 auto;border:1px solid var(--border);border-radius:999px;background:var(--bg-elevated);cursor:pointer;transition:background-color 180ms ease,border-color 180ms ease}.pd-switch::after{position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:50%;background:var(--text-muted);content:'';transition:transform 180ms ease,background-color 180ms ease}.pd-switch[aria-checked='true']{border-color:rgba(94,224,207,.4);background:rgba(94,224,207,.14)}.pd-switch[aria-checked='true']::after{background:var(--accent-mint);transform:translateX(20px)}[data-xp].xp-flash{animation:xp-flash .9s ease-out}@keyframes xp-flash{0% { color: var(--accent-green); transform: scale(1); } 35% { color: var(--accent-green); transform: scale(1.08); } 100% { transform: scale(1); }}@media (max-width: 1100px){:root{--sidebar-w:260px}.main-content{padding:32px 24px 64px}}@media (max-width: 900px){.app-shell{flex-direction:column;max-width:100%}.mobile-menu-btn{position:fixed;z-index:1002;top:14px;left:14px;display:grid;width:44px;height:44px;place-items:center;border:1px solid var(--border);border-radius:12px;background:var(--bg-surface);color:var(--text);box-shadow:var(--shadow-sm);cursor:pointer}.sidebar-overlay{position:fixed;z-index:1000;inset:0;display:block;background:rgba(0,0,0,.52);opacity:0;pointer-events:none;transition:opacity 200ms ease}.sidebar-overlay.open{opacity:1;pointer-events:auto}.sidebar{position:fixed;z-index:1001;top:0;left:0;width:280px;max-width:84vw;height:100vh;height:100dvh;padding:20px 14px;transform:translateX(-100%);transition:transform 240ms cubic-bezier(.2,.8,.2,1);box-shadow:var(--shadow-lg)}.sidebar.open{transform:translateX(0)}.sidebar__logo{margin-bottom:20px}.sidebar nav a{padding:12px 14px;margin-bottom:6px}.main-content{width:100%;max-width:100%;padding:84px 20px 40px;align-items:stretch}.main-content>*{max-width:100%}}@media (max-width: 600px){.landing-nav{padding:16px 18px}.landing-nav__login{display:none}.landing-hero{min-height:auto;padding:112px 18px 64px}.landing-cta{width:100%;flex-direction:column}.landing-cta .btn{width:100%}.hero-code-prism{margin-top:36px}.landing-terminal{min-height:calc(11.62em + 37px);padding:16px}.features-grid{grid-template-columns:1fr;width:calc(100% - 32px);margin:40px auto;gap:14px}.feature-card{padding:20px 18px}.community-proof{grid-template-columns:1fr;width:calc(100% - 32px)}.community-proof__item{min-height:78px;padding:14px}.community-proof__item+.community-proof__item{border-top:1px solid var(--border);border-left:0}.daily-challenge{align-items:flex-start;flex-wrap:wrap;padding:14px}.daily-challenge__spark{width:36px;height:36px}.daily-challenge__cta{width:100%}.auth-card{padding:28px 20px}.main-content{padding-inline:16px}.app-toast{right:12px;bottom:12px;max-width:calc(100vw - 24px)}.pd-invite-btn span{display:none}.pd-invite-btn{padding:7px 10px}.pd-scoreboard__score{font-size:1.4rem}.pd-result-card{padding:20px 16px}}@media (max-width: 480px){.main-content{padding:84px 14px 32px}.landing-hero h1{font-size:2rem}}@media (prefers-reduced-motion: reduce){*,*::before,*::after{scroll-behavior:auto !important;transition-duration:.01ms !important;animation-duration:.01ms !important;animation-iteration-count:1 !important}.landing-terminal{transform:none !important}[data-xp].xp-flash{animation:none}}