/* Economics Companion · scoped to .tc so the theme is untouched. */
.tc{--navy:#1c2b4a;--navy-2:#2c3f66;--brown:#b37e5a;--brown-soft:#f6eee8;--gold:#c9a227;--ink:#1d2329;--muted:#5d6670;--line:#e7e2dc;--bg:#faf8f5;--card:#fff;--good:#1f7a4d;--good-soft:#e7f3ec;--bad:#b3261e;--bad-soft:#fbeaea;--r:14px;
  max-width:1180px;margin:0 auto;padding:0 16px 40px;color:var(--ink);font-size:16px;line-height:1.55}
.tc *,.tc *::before,.tc *::after{box-sizing:border-box}
.tc a{color:var(--navy)}
.tc h2,.tc h3,.tc h4,.tc h5{color:var(--navy);line-height:1.25;margin:0 0 .5em}
.tc h2{font-size:1.5rem}.tc h3{font-size:1.2rem}.tc h4{font-size:1.05rem}.tc h5{font-size:1rem}
.tc-solo{max-width:760px;padding-top:24px}
.tc .screen-reader-text{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(1px,1px,1px,1px)}

/* cards */
.tc-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px 24px;margin:0 0 16px;box-shadow:0 1px 2px rgba(28,43,74,.04)}
.tc-eyebrow{font-size:.75rem;letter-spacing:.09em;text-transform:uppercase;font-weight:700;color:var(--brown);margin:0 0 6px}
.tc-small{font-size:.88rem;color:var(--muted)}
.tc-big{font-size:2rem;font-weight:700;color:var(--navy);margin:0 0 4px}
.tc-hero{background:linear-gradient(180deg,#fff 0%,var(--brown-soft) 160%);border-top:4px solid var(--brown)}
.tc-hero-title{font-size:1.75rem;margin:0 0 16px}
.tc-hero-cta{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin:18px 0 0}

/* tabs: top on desktop, bottom bar on phones */
.tc-tabs{display:flex;align-items:center;gap:6px;margin:20px 0 18px;padding:6px;background:var(--card);border:1px solid var(--line);border-radius:999px;box-shadow:0 1px 2px rgba(28,43,74,.04)}
.tc-brand{font-weight:700;color:var(--navy);padding:0 14px 0 12px;margin-right:auto;letter-spacing:.01em}
.tc-tab{display:flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;text-decoration:none!important;color:var(--muted)!important;font-weight:600;font-size:.95rem}
.tc-tab svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.tc-tab:hover{background:var(--bg);color:var(--navy)!important}
.tc-tab.is-on{background:var(--navy);color:#fff!important}
.tc-layout{display:block}
.tc-layout.has-side{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:20px;align-items:start}
.tc-main{min-width:0}

/* sidebar */
.tc-side{position:sticky;top:20px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px 14px;max-height:calc(100vh - 40px);overflow:auto}
.tc-side-head{display:flex;justify-content:space-between;align-items:center;margin:0 4px 8px}
.tc-side-head h2{font-size:1.05rem;margin:0}
.tc-side-toggle,.tc-side-open{font:inherit;font-size:.85rem;font-weight:600;color:var(--navy);background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:4px 12px;cursor:pointer}
.tc-side-open{display:none}
.tc-app.side-closed .tc-layout.has-side{grid-template-columns:minmax(0,1fr)}
.tc-app.side-closed .tc-side{display:none}
.tc-app.side-closed .tc-side-open{display:block;position:fixed;right:18px;top:50%;transform:translateY(-50%) rotate(-90deg);transform-origin:right center;z-index:20;border-radius:10px 10px 0 0;box-shadow:0 2px 8px rgba(0,0,0,.08)}

/* topic list */
.tc-topics .tc-theme{border-top:1px solid var(--line)}
.tc-topics .tc-theme:first-child{border-top:0}
.tc-theme summary{display:flex;justify-content:space-between;gap:8px;cursor:pointer;font-weight:700;color:var(--navy);padding:10px 4px;list-style:none;font-size:.95rem}
.tc-theme summary::-webkit-details-marker{display:none}
.tc-theme summary::after{content:"";width:8px;height:8px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);margin:6px 2px 0 6px;flex:0 0 auto}
.tc-theme[open] summary::after{transform:rotate(-135deg);margin-top:10px}
.tc-count{margin-left:auto;font-weight:600;color:var(--muted);font-size:.85rem}
.tc-topics ul{list-style:none;margin:0 0 8px;padding:0}
.tc-topics li a{display:flex;align-items:center;gap:10px;padding:7px 8px;border-radius:8px;text-decoration:none;color:var(--ink);font-size:.92rem}
.tc-topics li a:hover{background:var(--bg)}
.tc-topics li.is-open a{background:var(--brown-soft)}
.tc-utitle{flex:1}
.tc-dot{flex:0 0 14px;height:14px;border-radius:50%;border:2px solid #c9cfd6;background:#fff}
.tc-st-in_progress .tc-dot{border-color:var(--gold);background:linear-gradient(90deg,var(--gold) 50%,#fff 50%)}
.tc-st-done .tc-dot{border-color:var(--good);background:var(--good)}
.tc-st-done .tc-utitle{color:var(--muted)}
.tc-chip{display:inline-block;font-size:.72rem;font-weight:700;padding:2px 9px;border-radius:999px;background:var(--bg);color:var(--muted);white-space:nowrap}
.tc-chip--cur{background:var(--gold);color:var(--navy)}
.tc-chip--done{background:var(--good-soft);color:var(--good)}
.tc-chip--lock{background:#eceae6;color:#55606a}
.tc-chip--free{background:var(--good-soft);color:var(--good)}
.tc-upgrade{border:2px solid var(--navy)}
.tc-upgrade h3{margin-top:0}
.tc-upgrade--small{border-width:1px}
.tc-focus{margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}

/* buttons */
.tc-btn,.tc button.tc-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:var(--navy);color:#fff!important;border:2px solid var(--navy);border-radius:10px;padding:9px 18px;font:inherit;font-weight:600;text-decoration:none!important;cursor:pointer;line-height:1.3;transition:background .15s}
.tc-btn:hover{background:var(--navy-2)}
.tc-btn--big,.tc button.tc-btn--big{padding:13px 24px;font-size:1.05rem}
.tc-btn--ghost,.tc button.tc-btn--ghost{background:#fff;color:var(--navy)!important}
.tc-btn--ghost:hover{background:var(--bg)}
.tc-btn--danger,.tc button.tc-btn--danger{background:#fff;color:var(--bad)!important;border-color:var(--bad)}
.tc-link,.tc button.tc-link{background:none;border:0;padding:0;color:var(--navy);text-decoration:underline;font:inherit;font-size:.92rem;cursor:pointer}
.tc-inline{display:inline;margin:0}

/* this week: two step tiles */
.tc-steps2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.tc-steptile{display:flex;gap:14px;align-items:flex-start;padding:16px;border:1px solid var(--line);border-radius:12px;background:#fff;text-decoration:none!important;color:var(--ink)!important;transition:border-color .15s,box-shadow .15s}
.tc-steptile:hover{border-color:var(--navy);box-shadow:0 2px 10px rgba(28,43,74,.08)}
.tc-steptile b{display:block;color:var(--navy);font-size:1.05rem}
.tc-steptile.is-done{background:var(--good-soft);border-color:#cfe6d8}
.tc-num{flex:0 0 32px;width:32px;height:32px;border-radius:50%;background:var(--navy);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:700}
.tc-num.is-done,.is-done>.tc-num{background:var(--good)}

/* progress strip */
.tc-strip{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin:0 0 16px}
.tc-stat{background:#fff;padding:14px 16px;display:flex;flex-direction:column;justify-content:center}
.tc-stat b{font-size:1.35rem;color:var(--navy);line-height:1.2}
.tc-stat--ring{flex-direction:row;align-items:center;gap:12px}
.tc-stat--ring>span{display:flex;flex-direction:column}
.tc-ring{width:58px;height:58px;flex:0 0 58px}
.tc-ring-bg{fill:none;stroke:var(--bg);stroke-width:7}
.tc-ring-fg{fill:none;stroke:var(--brown);stroke-width:7;stroke-linecap:round}
.tc-ring text{font:700 13px/1 system-ui,sans-serif;fill:var(--navy)}
.tc-strip-pace{grid-column:1/-1;background:#fff;margin:0;padding:10px 16px;font-size:.92rem;color:var(--muted)}

.tc-upnext ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:10px}
.tc-upnext a{display:block;padding:12px 14px;border:1px solid var(--line);border-radius:10px;text-decoration:none;color:var(--navy);font-weight:600}
.tc-upnext a .tc-small{display:block;font-weight:400}
.tc-upnext a:hover{border-color:var(--navy)}

/* unit page */
.tc-unit-status{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:0}
.tc-step{scroll-margin-top:90px}
.tc-step-head{display:flex;align-items:center;gap:12px;margin:0 0 12px}
.tc-step-head h3{margin:0;font-size:1.3rem}
.tc-lessons{display:grid;gap:10px;margin:10px 0}
.tc-lesson{display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--bg)}
.tc-lesson b{flex:1 1 220px;color:var(--navy)}
.tc-extras{font-size:.88rem;color:var(--muted);flex-basis:100%}
.tc-part{border-top:1px solid var(--line);padding-top:16px;margin-top:16px}
.tc-part:first-of-type{border-top:0;padding-top:0;margin-top:4px}
.tc-part h4{display:flex;gap:10px;align-items:baseline;flex-wrap:wrap}
.tc-case{background:var(--brown-soft);border-left:4px solid var(--brown);border-radius:10px;padding:16px 18px;margin:12px 0 16px}
.tc-case p{margin:0 0 10px}
.tc-question{border:1px solid var(--line);border-radius:12px;padding:16px;margin:0 0 12px;background:#fff}
.tc-qhead{display:flex;gap:10px;align-items:center;margin-bottom:8px}
.tc-qnum{width:26px;height:26px;border-radius:50%;background:var(--bg);color:var(--navy);display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem}
.tc-marks{font-size:.85rem;font-weight:700;color:var(--brown)}
.tc-qtext{font-size:1.05rem;font-weight:600;margin:0 0 12px;color:var(--ink)}
.tc-qstem{font-weight:600;margin:0 0 8px}
.tc-markrow{margin-top:6px}
.tc-points{margin-top:10px;background:var(--bg);border-radius:8px;padding:10px 14px}
.tc-points summary{cursor:pointer;font-weight:600;color:var(--navy)}
.tc-nextunit{text-align:right}

/* quiz */
.tc-quiz{padding-left:22px;margin:0}
.tc-quiz>li{margin:0 0 20px}
.tc-opts{display:flex;flex-direction:column;gap:8px;max-width:620px}
.tc-qopt,.tc-opt{display:flex;gap:10px;align-items:center;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;font:inherit;text-align:left;color:var(--ink)}
.tc-qopt:hover,.tc-opt:hover{border-color:var(--navy)}
.tc-qopt input{position:absolute;opacity:0;pointer-events:none}
.tc-qopt:has(input:checked){border-color:var(--navy);background:#eef1f7}
.tc-letter{flex:0 0 26px;height:26px;border-radius:50%;border:1.5px solid #c9cfd6;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;color:var(--muted)}
.tc-qopt:has(input:checked) .tc-letter{background:var(--navy);border-color:var(--navy);color:#fff}
.tc-qopt.is-right,.tc-opt.is-right{border-color:var(--good);background:var(--good-soft)}
.tc-qopt.is-wrong,.tc-opt.is-wrong{border-color:var(--bad);background:var(--bad-soft)}
.tc-why{font-size:.92rem;color:var(--muted);margin:8px 0 0}
.tc-tablewrap{overflow-x:auto}
.tc-table{border-collapse:collapse;width:100%;font-size:.95rem;margin:6px 0 10px}
.tc-table th,.tc-table td{border-bottom:1px solid var(--line);padding:7px 10px;text-align:left}
.tc-table th{color:var(--muted);font-weight:600;font-size:.85rem}
.tc-src{max-width:520px}
.tc-src caption{text-align:left;font-size:.85rem;color:var(--muted);padding-bottom:4px}

/* forms and notes */
.tc-form label{display:block;margin:0 0 14px;font-weight:600;color:var(--navy)}
.tc-form input[type=email],.tc-form input[type=date],.tc-form input[type=number],.tc-form select{display:block;width:100%;max-width:440px;margin-top:5px;padding:9px 11px;border:1px solid #cfd4da;border-radius:8px;font:inherit;font-weight:400;background:#fff;color:var(--ink)}
.tc-form fieldset{border:0;padding:0;margin:0 0 14px}
.tc-form legend{font-weight:600;color:var(--navy);margin-bottom:4px}
.tc-form label.tc-check,.tc-check{display:inline-flex;gap:8px;align-items:center;font-weight:400;color:var(--ink);margin-right:16px}
.tc-row{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-end}
.tc-form.tc-row label,.tc-row label{margin:0}
.tc-row input[type=number]{width:110px}
.tc-form .tc-other{display:none}
.tc-form .tc-other.is-on{display:block}
.tc-notice{background:var(--good-soft);border-left:4px solid var(--good);padding:10px 14px;border-radius:8px;margin:0 0 16px}
.tc-notice--err{background:var(--bad-soft);border-left-color:var(--bad)}
.tc-note{background:#fbf6e6;border-left:4px solid var(--gold);padding:10px 14px;border-radius:8px;margin:14px 0 0;font-size:.95rem}
.tc-list{padding-left:20px}.tc-list li{margin:0 0 8px}

/* phones and narrow screens */
@media (max-width:900px){
  .tc{padding-bottom:96px}
  .tc-layout.has-side{display:block}
  .tc-side,.tc-side-open,.tc-app.side-closed .tc-side-open{display:none!important}
  .tc-tabs{position:fixed;left:0;right:0;bottom:0;z-index:100;margin:0;border-radius:0;border:0;border-top:1px solid var(--line);padding:6px 4px calc(6px + env(safe-area-inset-bottom));gap:0;justify-content:space-around;box-shadow:0 -2px 12px rgba(28,43,74,.08)}
  .tc-brand{display:none}
  .tc-tab{flex-direction:column;gap:2px;padding:6px 8px;font-size:.72rem;border-radius:10px;flex:1;align-items:center}
  .tc-tab svg{width:22px;height:22px}
  .tc-tab.is-on{background:transparent;color:var(--navy)!important}
  .tc-tab.is-on svg{stroke:var(--brown)}
  .tc-card{padding:18px 16px}
  .tc-hero-title{font-size:1.4rem}
  .tc-steps2,.tc-upnext ul{grid-template-columns:1fr}
  .tc-strip{grid-template-columns:1fr 1fr}
  .tc-stat--ring{grid-column:1/-1}
  .tc-hero-cta .tc-btn{width:100%}
  .tc-solo{padding-top:12px}
}
@media (min-width:901px){.tc-tab--topics{display:none}}
.tc-form label.tc-qopt{display:flex;margin:0;font-weight:500;color:var(--ink)}
.tc-qopt .tc-letter,.tc-opt .tc-letter{width:26px}

/* 1.2: marking on the unit page, model answers, My answers */
.tc .tc-embed{margin:12px 0}
.tc details.tc-manual{margin:10px 0;font-size:.92em}
.tc details.tc-manual summary{cursor:pointer;color:var(--muted,#5b6475)}
.tc .tc-attempts a{white-space:nowrap}
.tc details.tc-model{margin:12px 0;border:1px solid #e6dcc6;border-left:4px solid var(--gold,#c9a227);border-radius:8px;background:#fffdf7;padding:10px 14px}
.tc details.tc-model summary{cursor:pointer;font-weight:700;color:var(--navy,#1c2b4a)}
.tc .tc-model-body p{margin:.6em 0}
.tc .tc-model-box{border:1px dashed #b37e5a;border-radius:6px;padding:8px 12px;margin:.6em 0;background:#fff;font-size:.95em}
.tc .tc-model-locked{font-style:italic}
.tc .tc-answer-text{white-space:pre-wrap;background:#f6f1e7;border-radius:8px;padding:12px 14px;line-height:1.6}
.tc .tc-answer h3{margin-top:1.4em}
@media (max-width:600px){
  .tc .tc-step{padding-left:10px;padding-right:10px}
  .tc .tc-question{padding:12px 8px;border-radius:10px}
  .tc .tc-embed{margin-left:-4px;margin-right:-4px}
}
.tc .tc-model-box p{margin:.2em 0}.tc .tc-model-box ul{margin:.3em 0 .2em 1.2em;padding:0}
/* 1.2.3 */
.tc .tc-choose-help{margin:.4em 0 0;max-width:60ch}
.tc .tc-lesson-btns{display:flex;flex-wrap:wrap;gap:8px;margin:.5em 0 .3em}
.tc .tc-chip--hard{background:#f3e3d6;color:#8a4f27;font-size:.75em;vertical-align:middle}