:root{color-scheme:light;--bg:#f4f6fa;--panel:#fff;--text:#202b40;--muted:#69758a;--line:#e2e7ef;--accent:#245ad6;--selected:#edf3ff;--hover:#f5f7fb;--shadow:0 14px 44px #172d5710;--disabled:#7d899c;--button:#f7f9fc}
:root[data-theme=dark]{color-scheme:dark;--bg:#10151e;--panel:#181f2b;--text:#e7edf7;--muted:#9ba8bc;--line:#2b3546;--accent:#8bb0ff;--selected:#243656;--hover:#202a39;--shadow:0 14px 44px #0002;--disabled:#a0adc0;--button:#1d2735}:root[data-theme=warm]{color-scheme:light;--bg:#eee6dc;--panel:#f7f1e9;--text:#3c3128;--muted:#7c6957;--line:#d9c8b6;--accent:#c87433;--selected:#f3dfcb;--hover:#f2e7db;--shadow:0 14px 44px rgba(108,79,41,.12);--disabled:#9b8876;--button:#fbf5ee}:root[data-theme=dusk]{color-scheme:dark;--bg:#2b2830;--panel:#36323d;--text:#eee8f5;--muted:#b6adbf;--line:#504a59;--accent:#b18ac8;--selected:#45404d;--hover:#403a47;--shadow:0 14px 44px rgba(0,0,0,.22);--disabled:#9f95a8;--button:#3b3642}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"Segoe UI",Arial,sans-serif;font-size:16px;line-height:1.55}button{font:inherit;color:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid var(--accent);outline-offset:4px}button{ -webkit-tap-highlight-color:transparent} [hidden]{display:none!important}
.topbar{height:96px;display:flex;align-items:center;justify-content:space-between;padding:0 40px;gap:20px}.back{display:flex;align-items:center;gap:16px;border:0;background:none;padding:10px 0;font-weight:650;font-size:19px}.back svg{width:20px;height:20px;color:var(--muted)}.theme{margin-left:auto;width:44px;height:44px;display:grid;place-items:center;background:var(--panel);border:1px solid var(--line);border-radius:14px}.theme:hover{border-color:var(--accent)}.theme svg{height:20px;width:20px}.sun,.warm-icon,.dusk-icon{display:none}[data-theme=dark] .sun{display:block}[data-theme=dark] .moon,[data-theme=dark] .warm-icon,[data-theme=dark] .dusk-icon{display:none}[data-theme=warm] .warm-icon{display:block}[data-theme=warm] .moon,[data-theme=warm] .sun,[data-theme=warm] .dusk-icon{display:none}[data-theme=dusk] .dusk-icon{display:block}[data-theme=dusk] .moon,[data-theme=dusk] .sun,[data-theme=dusk] .warm-icon{display:none}
.home{min-height:calc(100svh - 192px);display:grid;place-items:center;padding:32px}.course{width:min(360px,100%);height:184px;background:var(--panel);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);display:flex;align-items:center;justify-content:space-between;padding:40px;font-size:30px;font-weight:650;letter-spacing:-.8px;position:relative;overflow:hidden;transition:transform .18s,border-color .18s,box-shadow .18s}.course:before{content:"";position:absolute;left:0;top:32px;bottom:32px;width:4px;background:var(--accent);border-radius:0 5px 5px 0}.course svg{width:26px;height:26px;color:var(--accent)}.course:hover{transform:translateY(-3px);border-color:var(--accent);box-shadow:0 18px 50px #172d571a}
.workspace{display:grid;grid-template-columns:224px minmax(0,1fr);gap:24px;padding:0 40px 40px;min-height:calc(100svh - 96px)}.chapters,.surface{background:var(--panel);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}.chapters{padding:28px 16px}.label{font-size:14px;font-weight:600;color:var(--muted);margin:0 12px 22px}.nav-button,.skill-button{display:flex;align-items:center;width:100%;border:1px solid transparent;border-radius:11px;background:none;text-align:left;padding:14px 16px;font-weight:550;margin:0 0 8px;min-height:54px}.nav-button:hover,.skill-button:hover{background:var(--hover)}.nav-button[aria-current=true],.skill-button[aria-pressed=true]{background:var(--selected);color:var(--accent);border-color:color-mix(in srgb,var(--accent) 15%,transparent)}.nav-button[aria-current=true]:before{content:"";width:3px;height:19px;background:var(--accent);border-radius:2px;margin-right:12px}.surface{padding:28px;display:grid;grid-template-columns:220px 270px minmax(0,1fr);gap:24px;align-items:stretch}.skills{border-right:1px solid var(--line);padding-right:24px}.skills .label{margin-left:12px}.skill-button{justify-content:space-between}.skill-button svg{height:16px;width:16px}.details{align-self:start}.levels{display:grid;gap:10px;padding:14px;border:1px solid var(--line);border-radius:15px}.level{height:48px;border:1px solid var(--line);border-radius:9px;background:var(--button);font-size:18px;font-weight:650;color:var(--disabled);cursor:not-allowed}.ponderings-box{margin-top:14px;padding:12px;border:1px solid var(--line);border-radius:15px;background:var(--hover)}
.ponderings-button{width:100%;min-height:48px;border:1px solid color-mix(in srgb,var(--accent) 35%,var(--line));border-radius:9px;background:var(--panel);color:var(--accent);font-size:16px;font-weight:650;cursor:pointer;transition:background .16s,border-color .16s,color .16s}
.ponderings-button:hover{background:var(--accent);color:var(--panel);border-color:var(--accent)}
.ponderings-page{max-width:980px;margin:0 auto;padding:28px 32px 56px}
.ponderings-page h1{margin:0 0 8px;font-size:32px;letter-spacing:-.7px}
.ponderings-intro{margin:0 0 28px;color:var(--muted)}
.ponderings-list{display:grid;gap:16px}
.pondering-card{border:1px solid var(--line);border-radius:16px;background:var(--panel);box-shadow:var(--shadow);padding:22px 24px}
.pondering-question{font-size:18px;font-weight:650;line-height:1.45;margin:0 0 18px}
.pondering-answer{min-height:54px;border-top:1px solid var(--line);padding-top:14px}
.pondering-answer-label{display:block;font-size:12px;letter-spacing:1.2px;font-weight:700;color:var(--muted);text-transform:uppercase;margin-bottom:8px}
@media(max-width:580px){.ponderings-page{padding:18px 16px 40px}.pondering-card{padding:19px 18px}.ponderings-page h1{font-size:27px}}
.description{margin-top:20px;border:1px solid var(--line);border-radius:15px;padding:24px}.description h1{font-size:23px;line-height:1.3;letter-spacing:-.5px;margin:0 0 14px;font-weight:650}.description p{margin:0 0 20px;color:var(--muted);font-size:16px}.example{border-top:1px solid var(--line);padding-top:16px;display:grid;gap:10px;font-variant-numeric:tabular-nums}.example span{display:flex;justify-content:space-between;gap:10px}.example b{font-weight:600}.example em{font-style:normal;color:var(--muted)}
@media(min-width:1600px){.workspace{grid-template-columns:250px 1fr}.surface{grid-template-columns:250px 300px minmax(0,1fr)}}
@media(max-width:1100px){.topbar{padding:0 24px}.workspace{padding:0 24px 24px;grid-template-columns:185px 1fr;gap:16px}.surface{padding:22px 18px;grid-template-columns:170px 240px minmax(0,1fr);gap:16px}.skills{padding-right:16px}.description{padding:20px}.chapters{padding:22px 10px}}
@media(max-width:850px){.topbar{height:80px}.workspace{min-height:calc(100svh - 80px);grid-template-columns:1fr;grid-template-rows:auto 1fr}.chapters{padding:16px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}.chapters .label{margin:0 12px 0 0}.nav-button{width:auto;margin:0;min-height:46px;padding:10px 16px}.surface{grid-template-columns:minmax(140px, .8fr) minmax(240px,1fr) minmax(0,.4fr);min-height:550px}.home{min-height:calc(100svh - 160px)}}
@media(max-width:580px){.topbar{padding:0 18px}.workspace{padding:0 14px 18px;gap:14px}.chapters{gap:8px;border-radius:16px}.chapters .label{width:100%;margin:0 0 3px 6px}.nav-button{flex:1;justify-content:center;font-size:15px}.surface{padding:18px 14px;grid-template-columns:minmax(0,1fr);gap:20px;border-radius:16px;align-content:start;min-height:640px}.skills{border-right:0;border-bottom:1px solid var(--line);padding:0 0 12px}.skills .label{margin:0 8px 12px}.skill-button{margin-bottom:0}.details{width:min(100%,300px)}.description{margin-top:16px}.reserved{min-height:32px}.course{height:165px;padding:32px;font-size:28px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* Philip Fysik */
:root{--bg:#f2f5fa;--shadow:0 8px 32px #223b6310}body{background:radial-gradient(ellipse at 50% 0%,color-mix(in srgb,var(--accent) 5%,var(--bg)),var(--bg) 65%);background-repeat:no-repeat;background-attachment:fixed;background-size:100vw 100vh;min-height:100svh}
.home{display:flex;flex-direction:column;justify-content:center;gap:48px;padding-bottom:100px}.course-list{width:min(340px,100%);display:grid;gap:14px}.course:disabled{cursor:not-allowed;opacity:.52;transform:none!important;border-color:var(--line)!important;box-shadow:var(--shadow)!important}.course:disabled svg{color:var(--muted)}.brand{width:min(690px,90vw);height:auto;mix-blend-mode:multiply;display:block}[data-theme=dusk] .brand{filter:invert(1) hue-rotate(215deg) saturate(.78) brightness(1.08) contrast(1.03) drop-shadow(0 10px 18px rgba(0,0,0,.20));mix-blend-mode:screen;opacity:.97}[data-theme=dark] .brand{filter:invert(1) hue-rotate(180deg);mix-blend-mode:screen}.course-wrap{width:min(340px,100%)}.course{width:100%;height:112px;padding:30px 34px;font-size:26px;border-radius:18px}.course:before{top:26px;bottom:26px}.surface{grid-template-columns:180px 245px minmax(260px,1fr);gap:22px}.workspace{grid-template-columns:195px minmax(0,1fr);gap:20px;padding:0 28px 28px}.topbar{padding:0 28px}.surface{padding:26px 22px}.skills{padding-right:18px}.levels{padding:12px;background:var(--hover)}.e-row{display:flex;gap:12px;align-items:center}.e-button{flex:1;cursor:pointer;background:var(--panel);border-color:color-mix(in srgb,var(--accent) 35%,var(--line));color:var(--accent)}.e-button:hover,.e-button[aria-expanded=true]{background:var(--accent);color:var(--panel);border-color:var(--accent)}.tracker{font-size:14px;font-weight:600;min-width:40px;color:var(--muted);font-variant-numeric:tabular-nums}.description{padding:22px}.exercises{align-self:start;min-width:0;border-left:1px solid var(--line);padding-left:24px}.exercise-top{display:flex;justify-content:space-between;align-items:center;gap:12px}.eyebrow{font-size:12px;letter-spacing:1.6px;font-weight:700;color:var(--muted)}.close-exercises{width:34px;height:34px;border:0;border-radius:9px;background:transparent;font-size:25px;color:var(--muted)}.close-exercises:hover{background:var(--hover)}.problem-tabs{display:flex;gap:9px;margin:18px 0 26px}.problem-tabs button{width:42px;height:42px;border:1px solid var(--line);border-radius:12px;background:var(--panel);font-weight:600;position:relative}.problem-tabs button[aria-pressed=true]{background:var(--selected);color:var(--accent);border-color:var(--accent)}.problem-tabs button[data-solved=true]:after{content:'✓';position:absolute;right:-5px;top:-7px;border-radius:50%;background:var(--accent);color:var(--panel);font-size:11px;width:17px;height:17px;display:grid;place-items:center}.problem-title{font-size:24px;letter-spacing:-.6px;line-height:1.3;margin:0 0 14px}.skill-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:24px}.skill-tag{font-size:12px;padding:4px 8px;border-radius:6px;background:var(--hover);color:var(--muted);border:1px solid var(--line)}.problem-question{margin:0 0 16px}.subquestions{margin:0 0 26px;padding-left:24px}.subquestions li{padding:5px 0 5px 5px}.reveal{border-top:1px solid var(--line);padding:14px 0}.reveal summary{font-size:14px;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}.reveal summary::-webkit-details-marker{display:none}.reveal summary:after{content:'+';font-size:20px;color:var(--muted)}.reveal[open] summary:after{content:'−'}.reveal p{margin:14px 0 4px;font-size:15px;line-height:1.7}.reveal ol{font-size:15px;padding-left:24px;line-height:1.7}.reveal li{padding:4px 0}.solved-toggle{width:100%;padding:12px 14px;border:1px solid var(--accent);border-radius:10px;background:var(--accent);color:var(--panel);font-weight:600;margin-top:20px;font-size:14px}.solved-toggle[aria-pressed=true]{color:var(--accent);background:var(--selected)}
@media(min-width:1600px){.workspace{grid-template-columns:230px 1fr;max-width:1760px;margin:auto}.surface{grid-template-columns:230px 285px minmax(280px,1fr);gap:30px}}
@media(max-width:1200px){.workspace{grid-template-columns:165px minmax(0,1fr);padding:0 20px 24px;gap:16px}.surface{grid-template-columns:150px 220px minmax(0,1fr);gap:16px;padding:22px 16px}.exercises{padding-left:16px}.skills{padding-right:12px}.description{padding:18px}.nav-button{padding-left:10px;padding-right:10px}}
@media(max-width:1000px){.workspace{grid-template-columns:1fr;grid-template-rows:auto 1fr}.chapters{padding:14px;display:flex;align-items:center;gap:10px}.chapters .label{margin:0 14px 0 4px}.nav-button{width:auto;margin:0;padding:10px 16px;min-height:46px}.surface{grid-template-columns:150px 220px minmax(0,1fr);min-height:560px}}
@media(max-width:760px){.surface{grid-template-columns:150px minmax(0,1fr)}.details{max-width:300px}.exercises{grid-column:1/-1;border-left:0;border-top:1px solid var(--line);padding:24px 0 0}.surface:has(.exercises:not([hidden])){min-height:auto}.home{gap:32px}.brand{width:min(620px,95vw)}}
@media(max-width:580px){.workspace{padding:0 12px 16px}.surface{grid-template-columns:1fr;padding:18px}.chapters{flex-wrap:wrap}.chapters .label{width:100%;margin-bottom:2px}.nav-button{flex:1}.skills{border-right:0;padding:0 0 12px}.details{width:100%;max-width:none}.home{padding:20px 24px 80px;gap:24px}.course-wrap{width:min(280px,100%)}.course{height:96px;font-size:24px}.exercises{grid-column:auto}.brand{width:100%;max-width:460px}}

.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}
.exercise-page{display:grid;grid-template-columns:72px minmax(0,1fr) 250px;gap:20px;max-width:1600px;margin:16px auto 0;padding:0 28px 40px;align-items:start}.task-number{min-height:60px;display:grid;place-items:center;border:1px solid color-mix(in srgb,var(--accent) 25%,var(--line));background:var(--selected);color:var(--accent);font-size:22px;font-weight:650;border-radius:14px;font-variant-numeric:tabular-nums}.question-card{position:relative;min-height:230px;border:1px solid var(--line);border-radius:20px;background:var(--panel);padding:34px 94px 34px 38px;box-shadow:var(--shadow);display:flex;flex-direction:column;justify-content:flex-start;align-items:flex-start;gap:18px}.question-card h1{font-size:clamp(18.4px,1.76vw,25.6px);font-weight:550;letter-spacing:-.6px;line-height:1.5;margin:0;max-width:780px}.question-review{position:absolute;top:20px;right:20px;width:34px;height:34px;border-radius:9px;border:2px solid color-mix(in srgb,var(--accent) 38%,var(--line));background:color-mix(in srgb,var(--panel) 84%,var(--bg));display:grid;place-items:center;color:var(--accent);font-size:20px;font-weight:700;line-height:1;box-shadow:0 4px 14px #0000000a;user-select:none}.question-review[data-reviewed=true]{background:color-mix(in srgb,var(--accent) 16%,var(--panel));border-color:var(--accent)}.question-review[data-reviewed=false]{color:transparent}.question-figure{margin:4px 0 0;display:inline-block;align-self:flex-start;width:auto;max-width:400px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:8px;box-shadow:0 4px 12px #172d5708}.question-figure[hidden]{display:none}.question-figure img{display:block;width:380px;max-width:100%;height:auto;border-radius:10px;background:#fff;cursor:zoom-in}.figure-modal{position:fixed;inset:0;display:grid;place-items:center;padding:24px;background:#08101bd4;backdrop-filter:blur(2px);z-index:80}.figure-modal[hidden]{display:none}.figure-modal__panel{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:0 20px 60px #00000045}.figure-modal__frame{position:relative;display:inline-block;line-height:0}.figure-modal__img{display:block;width:min(760px,calc(100vw - 80px));max-width:100%;height:auto;border-radius:12px;background:#fff}.figure-modal__close{position:absolute;top:10px;right:10px;border:0;border-radius:999px;width:34px;height:34px;display:grid;place-items:center;background:#0f1f3a;color:#fff;font-size:20px;cursor:pointer;line-height:1}#answer-form{display:flex;gap:14px;margin-top:22px;align-items:center}#answer{width:min(420px,100%);min-width:0;padding:14px 20px;border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--text);font:inherit;font-size:20px;min-height:60px;box-shadow:0 3px 10px #172d5705;white-space:nowrap;overflow-x:auto;overflow-y:hidden;cursor:text;line-height:1.45}#answer:empty:before{content:attr(data-placeholder);color:var(--muted);font-size:16px;pointer-events:none}#answer:focus{outline:2px solid var(--accent);outline-offset:3px}#answer[aria-invalid=true]{border-color:#c64a53}#answer sup{font-size:.72em;line-height:0;vertical-align:super;margin-left:1px;letter-spacing:.01em}#answer sup[data-exp]{color:inherit}#answer sup[data-active=true]{background:color-mix(in srgb,var(--accent) 12%,transparent);border-radius:3px}#answer .math-baseline-anchor{font-size:1em;line-height:1.45;vertical-align:baseline}#answer-wrap{}.feedback{min-height:26px;margin:16px 0 0;font-size:14px;color:var(--muted)}.task-aside{display:grid;gap:16px}.task-skills{min-height:230px;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:24px}.task-skills h2{margin:0 0 22px;font-size:14px;font-weight:600;color:var(--muted)}#task-skills{display:flex;flex-wrap:wrap;gap:8px;align-content:start}.task-skills .skill-tag{font-size:14px;padding:7px 10px}.task-reveal{border:1px solid var(--line);border-radius:12px;background:var(--panel);padding:17px 20px}.task-reveal summary{cursor:pointer;font-size:15px;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:10px}.task-reveal summary::-webkit-details-marker{display:none}.task-reveal summary:after{content:'+';color:var(--accent)}.task-reveal[open] summary:after{content:'−'}.task-reveal p{font-size:15px;line-height:1.75;margin:18px 0 0;overflow-wrap:anywhere}.completion{min-height:65vh;display:grid;place-items:center;padding:24px}.completion-card{text-align:center;background:var(--panel);border:1px solid var(--line);padding:44px;border-radius:24px;box-shadow:var(--shadow)}.completion-card h1{font-size:25px;margin:20px 0 28px}.completion-check{margin:auto;width:56px;height:56px;border-radius:50%;display:grid;place-items:center;background:var(--selected);color:var(--accent);font-size:28px}.completion-card button{border:0;background:var(--accent);color:var(--panel);border-radius:10px;padding:12px 22px;font-weight:600}
@media(max-width:1000px){.exercise-page{grid-template-columns:62px minmax(0,1fr) 210px;gap:16px;padding:0 20px 30px}.question-card{padding:28px 82px 28px 28px;min-height:240px}.task-skills{padding:20px;min-height:240px}}
@media(max-width:700px){.exercise-page{grid-template-columns:60px minmax(0,1fr);padding:0 16px 26px;gap:14px;margin-top:8px}.task-main{grid-column:1/-1}.task-number{min-height:46px;border-radius:10px;font-size:18px}.question-card{min-height:180px;padding:24px 72px 24px 24px}.question-card h1{font-size:23px}.question-review{top:16px;right:16px;width:30px;height:30px;border-radius:8px;font-size:18px}.task-aside{grid-column:1/-1;grid-template-columns:1fr 1fr;gap:12px}.task-skills{grid-column:1/-1;min-height:auto;padding:20px}.task-skills h2{margin-bottom:12px}.task-reveal{padding:16px}.task-reveal summary{font-size:14px}#answer{width:100%}.feedback{margin:12px 0 4px}}

.e-button{position:relative;width:100%;display:flex;align-items:center;justify-content:center;padding:0 65px}.e-button .tracker{position:absolute;right:14px;min-width:0;color:inherit;font-size:14px;font-weight:500}.answer-wrap{position:relative;width:min(420px,100%);min-width:0}.answer-wrap #answer{width:100%;padding-right:64px}.keyboard-toggle{position:absolute;right:10px;top:50%;transform:translateY(-50%);width:40px;height:40px;display:grid;place-items:center;border:1px solid transparent;border-radius:9px;background:var(--hover);color:var(--muted)}.keyboard-toggle:hover,.keyboard-toggle[aria-expanded=true]{color:var(--accent);border-color:var(--line);background:var(--selected)}.keyboard-toggle svg{width:23px;height:23px}.keypad{width:min(420px,100%);margin-top:14px;padding:12px;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;background:var(--panel);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}.keypad button{min-height:46px;border:1px solid var(--line);border-radius:9px;background:var(--button);font-size:19px;font-weight:550}.keypad button:hover{background:var(--selected);border-color:var(--accent);color:var(--accent)}.keypad button[data-key=clear]{grid-column:span 2;font-size:14px}.keypad button[data-key=enter]{grid-column:span 3;font-size:14px;background:var(--accent);color:var(--panel);border-color:var(--accent)}.keypad sup{font-size:12px}.solution-steps{list-style:none;counter-reset:step;display:grid;gap:20px;margin:22px 0;padding:0}.solution-steps li{counter-increment:step;position:relative;padding-left:31px;font-size:15px;line-height:1.75;color:var(--text);overflow-wrap:anywhere}.solution-steps li:before{content:counter(step);position:absolute;left:0;top:3px;width:21px;height:21px;display:grid;place-items:center;border-radius:6px;background:var(--selected);color:var(--accent);font-size:12px;font-weight:650}.solution-result{border-top:1px solid var(--line);padding:16px 0 2px;display:grid;gap:8px}.solution-result span{font-size:12px;color:var(--muted)}.solution-result strong{font-size:19px;font-weight:600;color:var(--accent);overflow-wrap:anywhere}
@media(max-width:700px){.answer-wrap{width:100%}.task-reveal:has(#task-solution){grid-column:1/-1}}

.level-row{display:flex;gap:8px;align-items:center}.level-row .e-button{min-width:0;padding:0 54px;flex:1}.list-button{flex:0 0 34px;width:34px;height:40px;display:grid;place-items:center;border:0;background:transparent;color:var(--muted);border-radius:8px}.list-button svg{width:21px;height:21px}.list-button:hover:enabled{color:var(--accent);background:var(--selected)}.level:disabled,.list-button:disabled{cursor:not-allowed;color:var(--disabled);opacity:.65}.level:disabled{background:var(--button);border-color:var(--line)}.overview{max-width:1080px;margin:12px auto;padding:0 28px 50px}.overview-header h1{font-size:27px;font-weight:600;margin:0 0 28px}.problem-list{display:grid;gap:10px}.problem-row{display:grid;grid-template-columns:58px minmax(0,1fr) 24px;gap:18px;align-items:center;text-align:left;border:1px solid var(--line);background:var(--panel);padding:20px;border-radius:13px;line-height:1.6;width:100%}.problem-row:hover{border-color:var(--accent);background:var(--hover)}.problem-id{color:var(--accent);font-weight:650}.problem-state{color:var(--accent)}.formula{font-size:21px;color:var(--accent);font-weight:550;padding:16px 0;border-top:1px solid var(--line)}
@media(max-width:580px){.overview{padding:0 16px 30px}.problem-row{padding:16px;gap:10px;grid-template-columns:42px minmax(0,1fr) 18px}}
.skills .skill-button{padding-left:10px;padding-right:8px;font-size:15px}
.skills .skill-button{overflow-wrap:anywhere}.description h1{overflow-wrap:anywhere}#answer-form{flex-wrap:wrap}
.task-navigation{display:flex;flex-direction:column;gap:12px;align-items:stretch}.skip-button{padding:12px 16px;border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--text);font:inherit;cursor:pointer}.skip-button:hover{border-color:currentColor}.skill-button{white-space:normal;text-align:left}.skip-button:disabled{opacity:.45;cursor:default}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}.header-status{display:flex;align-items:center;margin-right:12px}.header-status[hidden]{display:none!important}.course-level-shell{position:relative;display:flex;align-items:center;min-width:min(430px,40vw);padding:0;background:transparent;border:0;box-shadow:none}.course-level{position:relative;z-index:3;width:70px;height:70px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex:0 0 auto;background:color-mix(in srgb,var(--panel) 90%,var(--accent) 10%);border:1px solid color-mix(in srgb,var(--accent) 24%,var(--line));color:var(--accent);line-height:1}.course-level-value{font-size:32px;font-weight:900;letter-spacing:-1px;font-family:Impact, Haettenschweiler, 'Arial Black', 'Segoe UI', sans-serif}.course-level-bar{position:relative;z-index:1;min-width:min(320px,30vw);height:44px;display:flex;align-items:center;flex:1;margin-left:-24px;padding:0 16px 0 52px;box-sizing:border-box;border-radius:999px;border:1px solid color-mix(in srgb,var(--accent) 10%,var(--line));background:color-mix(in srgb,var(--bg) 42%,var(--panel) 58%);overflow:hidden}.course-level-fill{position:absolute;left:0;top:0;bottom:0;width:0%;border-radius:inherit;background:linear-gradient(90deg,#69bf63 0%,#8ad776 100%);transition:width .25s ease}.course-level-bar::after{content:'';position:absolute;inset:0;border-radius:inherit;box-shadow:inset 0 1px 0 rgba(255,255,255,.35);pointer-events:none}.course-level-text{position:relative;z-index:2;font-size:18px;font-weight:800;letter-spacing:-.15px;color:var(--text);font-variant-numeric:tabular-nums}.header-actions .theme{margin-left:0}[data-theme=dark] .course-level-fill{background:linear-gradient(90deg,#4ca35a 0%,#73c96b 100%)}[data-theme=warm] .course-level-fill{background:linear-gradient(90deg,#6cb460 0%,#90d274 100%)}[data-theme=dusk] .course-level-fill{background:linear-gradient(90deg,#5a9d66 0%,#7cc381 100%)}@media(max-width:980px){.topbar{flex-wrap:wrap;height:auto;padding-top:18px;padding-bottom:18px}.header-actions{width:100%;justify-content:flex-end}.header-status{order:-1;flex:1 1 100%;margin-right:0}.course-level-shell{min-width:0;flex:1}.course-level-bar{min-width:0}}
.level.prereq-locked{position:relative;cursor:not-allowed!important;color:var(--disabled)!important;background:var(--button)!important;border-color:var(--line)!important;overflow:visible}.level.prereq-locked:hover{background:var(--button)!important;border-color:var(--line)!important;color:var(--disabled)!important}.level.prereq-locked>span:first-child{opacity:0}.level.prereq-locked:before{content:"🔒";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-size:18px;line-height:1;z-index:2}.level.prereq-locked:hover:after,.level.prereq-locked:focus-visible:after{content:attr(data-lock-message);position:absolute;z-index:20;left:50%;bottom:calc(100% + 10px);transform:translateX(-50%);width:270px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--panel);color:var(--text);box-shadow:var(--shadow);font-size:13px;font-weight:500;line-height:1.45;text-align:center;white-space:normal;pointer-events:none}.level.prereq-locked[aria-disabled=true]{opacity:1}.level.no-content{position:relative;cursor:not-allowed!important;opacity:.82;overflow:hidden}.level.no-content:hover{background:var(--panel)!important;color:var(--accent)!important;border-color:var(--line)!important}.level.no-content>span{position:relative;z-index:1}.no-content-mark{position:absolute;inset:-1px;width:calc(100% + 2px);height:calc(100% + 2px);z-index:3;pointer-events:none;overflow:visible;color:currentColor}.no-content-mark line{stroke:currentColor;stroke-width:2.6;stroke-linecap:round;vector-effect:non-scaling-stroke;opacity:.9}

.medals-page{max-width:1400px;margin:0 auto;padding:30px 32px 48px}.medals-page>h1{margin:0}.medals-board{display:grid;grid-template-columns:minmax(0,2.6fr) 1px minmax(280px,1fr);gap:38px;align-items:start;min-height:600px;padding:10px 4px 28px;background:transparent;border:0;border-radius:0;box-shadow:none}.medal-column{display:flex;flex-direction:column;gap:24px;min-height:560px}.medal-column h2{font-size:20px;margin:0}.medal-divider{align-self:stretch;background:var(--line);border-radius:999px}.medal-list{display:grid;gap:22px;align-content:start}.medal-entry{position:relative;display:grid;grid-template-columns:92px minmax(0,1fr);gap:16px;align-items:center;outline:none}.medal-entry:focus-visible{border-radius:18px}.medal-entry:focus-visible .medal-badge,.medal-entry:focus-visible .medal-label{outline:2px solid var(--accent);outline-offset:3px}.medal-badge{width:92px;height:92px;border-radius:50%;display:grid;place-items:center;border:2px solid color-mix(in srgb,#bd8a25 55%,var(--line));background:radial-gradient(circle at 30% 25%,#fff5d2 0,#f0d896 42%,#d1a849 100%);box-shadow:0 8px 24px #bd8a2530;color:#6d4c11;overflow:hidden}.medal-badge svg{width:62px;height:62px}.medal-label{min-height:76px;padding:15px 18px;border:1px solid var(--line);border-radius:16px;background:var(--hover);display:flex;flex-direction:column;justify-content:center;gap:5px;box-sizing:border-box}.medal-label strong{font-size:17px;line-height:1.25}.medal-label .medal-subtitle{font-size:12px;font-style:italic;line-height:1.35;color:var(--muted)}.medal-label small{font-size:13px;color:var(--muted)}.medal-entry.is-earned .medal-label{background:color-mix(in srgb,#bd8a25 10%,var(--panel));border-color:color-mix(in srgb,#bd8a25 25%,var(--line))}.medal-entry.is-progress .medal-label{background:var(--panel)}.medal-progress{display:block;width:100%;height:8px;appearance:none;border:0;border-radius:999px;background:var(--hover);overflow:hidden;margin-top:4px}.medal-progress::-webkit-progress-bar{background:var(--hover)}.medal-progress::-webkit-progress-value{background:#bd8a25;border-radius:999px}.medal-progress::-moz-progress-bar{background:#bd8a25;border-radius:999px}.medal-history{position:absolute;z-index:30;left:108px;top:calc(100% + 10px);width:min(390px,calc(100vw - 48px));padding:10px;border:1px solid var(--line);border-radius:14px;background:var(--panel);box-shadow:var(--shadow);display:grid;gap:7px;opacity:0;visibility:hidden;transform:translateY(-4px);transition:opacity .15s ease,transform .15s ease,visibility .15s;pointer-events:none}.medal-entry.is-earned:hover .medal-history,.medal-entry.is-earned:focus-visible .medal-history,.medal-entry.is-earned:focus-within .medal-history{opacity:1;visibility:visible;transform:translateY(0)}.medal-history-requirement{padding:3px 5px 10px;margin-bottom:1px;border-bottom:1px solid var(--line);font-size:13px;font-weight:600;line-height:1.45;color:var(--text)}.medal-history-row{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:10px;align-items:baseline;padding:8px 9px;border-radius:9px;background:var(--hover);font-size:13px;line-height:1.35}.medal-history-level{font-weight:700;color:var(--accent);white-space:nowrap}.medal-history-name{font-weight:600;min-width:0;overflow-wrap:anywhere}.medal-history-date{color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}.medal-list:empty{min-height:12px}@media(max-width:900px){.medals-board{grid-template-columns:minmax(0,1fr);gap:24px}.medal-divider{height:1px}.medal-column{min-height:auto}.medal-history{left:0;right:auto}}#medal-toast{position:fixed;z-index:1000;bottom:24px;left:50%;width:min(340px,calc(100vw - 32px));box-sizing:border-box;display:flex;gap:14px;align-items:center;padding:16px 20px;background:var(--panel);color:var(--text);border:1px solid #bd8a25;border-radius:16px;box-shadow:0 10px 36px #0003;opacity:0;transform:translate(-50%,24px);visibility:hidden;transition:transform .3s ease,opacity .3s ease,visibility .3s;pointer-events:none}#medal-toast.visible{opacity:1;transform:translate(-50%,0);visibility:visible}#medal-toast svg{width:34px;height:34px;flex-shrink:0;color:#bd8a25}#medal-toast small{display:block;color:var(--muted);font-size:13px;margin-bottom:4px}#medal-toast strong{font-size:16px}@media(prefers-reduced-motion:reduce){#medal-toast{transition:none}}


/* Erhållna medaljer: medaljbild ovanför namnplatta */
.medal-column--earned .medal-list{grid-template-columns:repeat(auto-fill,minmax(150px,176px));gap:30px 26px;align-items:start;justify-content:start}
.medal-column--earned .medal-entry{display:flex;flex-direction:column;align-items:center;gap:10px;width:176px;max-width:100%;text-align:center}
.medal-column--earned .medal-badge{width:116px;height:116px;flex:0 0 116px}
.medal-column--earned .medal-badge svg{width:76px;height:76px}
.medal-column--earned .medal-label{width:176px;min-height:58px;padding:11px 12px;border-radius:10px;align-items:center;justify-content:center;background:color-mix(in srgb,#bd8a25 10%,var(--panel));border-color:color-mix(in srgb,#bd8a25 25%,var(--line))}
.medal-column--earned .medal-label strong{font-size:15px;line-height:1.3;text-align:center;overflow-wrap:anywhere}.medal-column--earned .medal-label .medal-subtitle{display:block;text-align:center;max-width:100%}
.medal-column--earned .medal-label small{display:none}
.medal-column--earned .medal-history{left:50%;right:auto;top:calc(100% + 12px);transform:translate(-50%,-4px);width:min(390px,calc(100vw - 40px));text-align:left}
.medal-column--earned .medal-entry:hover .medal-history,.medal-column--earned .medal-entry:focus-visible .medal-history,.medal-column--earned .medal-entry:focus-within .medal-history{transform:translate(-50%,0)}
@media(max-width:580px){.medal-column--earned .medal-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 14px}.medal-column--earned .medal-entry{width:100%}.medal-column--earned .medal-label{width:100%;max-width:176px}.medal-column--earned .medal-badge{width:104px;height:104px;flex-basis:104px}.medal-column--earned .medal-badge svg{width:68px;height:68px}}