/* Think Better Challenges + homepage — TD Think Better Tools v2.4.0
   Scoped to .tdch-*; same palette as tools.css with fallbacks. */
.tdch-home, .tdch-explain, .tdch-distort, .tdch-daily, .tdch-lateral, .tdtc-check, .tdtc-results {
  --c-sky: var(--sky, #5bbfcc);
  --c-sky-light: var(--sky-light, #e8f7fa);
  --c-sky-mid: var(--sky-mid, #c2eaf0);
  --c-gold: var(--gold, #f5a623);
  --c-gold-light: var(--gold-light, #fff8ec);
  --c-text: var(--text, #1a3640);
  --c-text-mid: var(--text-mid, #3a6370);
  --c-ok: #1e7a4c; --c-ok-bg: #e6f5ec;
  --c-no: #b3261e; --c-no-bg: #fdecea;
  --c-close: #8a5a00; --c-close-bg: #fff3d6;
  font-family: 'Nunito', system-ui, -apple-system, 'Segoe UI', sans-serif;
  color: var(--c-text);
  line-height: 1.55;
}
.tdch-home *, .tdch-explain *, .tdch-distort *, .tdch-daily *, .tdch-lateral *, .tdtc-check *, .tdtc-results * { box-sizing: border-box; }
.tdtc-check, .tdtc-results { max-width: 760px; margin: 0 auto; }
.tdch-explain, .tdch-distort, .tdch-daily { max-width: 760px; margin: 0 auto; }

/* ── Homepage layout ── */
.tdch-home { margin: 0 auto; }
.tdch-hero {
  background: var(--c-text); color: #fff; text-align: center;
  padding: clamp(48px, 9vw, 96px) 20px clamp(44px, 8vw, 84px);
  border-radius: 0 0 28px 28px;
}
.tdch-hero-logo { width: 84px; height: 84px; border-radius: 50%; background: #fff; padding: 6px; margin: 0 auto 18px; display: block; }
.tdch-hero-kicker { font-size: 13px; font-weight: 800; letter-spacing: 3px; text-transform: uppercase; color: var(--c-sky); margin-bottom: 10px; }
.tdch-hero h1 {
  font-family: 'Bebas Neue', Impact, sans-serif; font-weight: 400;
  font-size: clamp(56px, 11vw, 120px); line-height: .92; letter-spacing: 2px;
  margin: 0 0 22px; color: #fff;
}
.tdch-hero h1 span { color: var(--c-gold); display: block; }
.tdch-hero-sub { font-size: clamp(18px, 2.4vw, 22px); max-width: 620px; margin: 0 auto 28px; color: #d8eef2; }
.tdch-hero-sub strong { color: #fff; }
.tdch-hero .tdch-btn-big {
  font-size: 20px; padding: 18px 34px; letter-spacing: 1px; text-transform: uppercase;
  background: var(--c-gold); color: var(--c-text); border-color: var(--c-gold);
  box-shadow: 0 6px 24px rgba(245, 166, 35, .35);
}
.tdch-hero .tdch-btn-big:hover { background: #ffb733; border-color: #ffb733; }
.tdch-hero-fine { font-size: 14px; color: #9cc7cf; margin: 16px 0 0; }

.tdch-sec { padding: clamp(44px, 7vw, 72px) 20px 0; }
.tdch-sec-head { max-width: 760px; margin: 0 auto 22px; }
.tdch-label { font-size: 12px; font-weight: 800; letter-spacing: 2.5px; text-transform: uppercase; color: var(--c-sky); margin-bottom: 4px; }
.tdch-title {
  font-family: 'Bebas Neue', Impact, sans-serif; font-weight: 400;
  font-size: clamp(36px, 6vw, 54px); letter-spacing: 1.5px; line-height: 1; margin: 0 0 10px; color: var(--c-text);
}
.tdch-desc { margin: 0; font-size: 17px; color: var(--c-text-mid); }

.tdch-defense { max-width: 1160px; margin: 0 auto; }
.tdch-def-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
@media (max-width: 1000px) { .tdch-def-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 860px) { .tdch-def-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .tdch-def-grid { grid-template-columns: 1fr; } }
.tdch-def {
  background: #fff; border: 1px solid var(--c-sky-mid); border-radius: 14px; padding: 18px 18px 16px;
  display: flex; flex-direction: column;
}
.tdch-def h3 { margin: 0 0 6px; font-size: 18px; font-weight: 800; }
.tdch-def p { margin: 0 0 12px; font-size: 15px; color: var(--c-text-mid); flex: 1; }
.tdch-def .tdch-btn { align-self: flex-start; font-size: 14px; padding: 8px 14px; }
.tdch-defense .tdch-sec-head { max-width: 1160px; }
.tdch-toolkit { padding-bottom: 60px; }

/* ── Cards & common pieces ── */
.tdch-card {
  background: #fff; border: 1px solid var(--c-sky-mid); border-top: 4px solid var(--c-gold);
  border-radius: 14px; padding: 26px 28px 22px; box-shadow: 0 6px 24px rgba(26, 54, 64, .08);
}
@media (max-width: 560px) { .tdch-card { padding: 20px 18px 18px; } }
.tdch-kicker { font-size: 12px; font-weight: 800; letter-spacing: 2px; text-transform: uppercase; color: var(--c-text-mid); margin-bottom: 4px; }
.tdch-q { font-size: clamp(19px, 2.6vw, 23px); font-weight: 800; line-height: 1.3; margin: 0 0 8px; color: var(--c-text); }
.tdch-q:focus { outline: none; }
.tdch-q em { font-style: normal; color: #0f7f8e; }
.tdch-note { margin: 0 0 16px; color: var(--c-text-mid); }
.tdch-fine { margin: 16px 0 0; font-size: 13px; color: var(--c-text-mid); }
.tdch-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.tdch-btn {
  display: inline-flex; align-items: center; gap: 6px; text-decoration: none;
  font: inherit; font-weight: 800; font-size: 16px; padding: 12px 22px; border-radius: 10px; cursor: pointer;
  background: #fff; color: var(--c-text); border: 2px solid var(--c-sky-mid);
  transition: background .15s, border-color .15s, transform .1s;
}
.tdch-btn:hover { border-color: var(--c-sky); }
.tdch-btn:active { transform: translateY(1px); }
.tdch-primary { background: var(--c-text); color: #fff; border-color: var(--c-text); }
.tdch-primary:hover { background: #24495a; border-color: #24495a; }
.tdch-ghost { border-color: transparent; color: var(--c-text-mid); text-decoration: underline; padding-left: 8px; padding-right: 8px; }
.tdch-btn:focus-visible, .tdch-opt:focus-visible, .tdch-chip:focus-visible, .tdch-real summary:focus-visible, .tdch-scale input:focus-visible {
  outline: 3px solid var(--c-gold); outline-offset: 2px;
}
.tdch-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }

/* Explanation Test */
.tdch-steps { display: flex; gap: 6px; margin-bottom: 14px; font-size: 13px; font-weight: 800; }
.tdch-steps span { padding: 4px 10px; border-radius: 99px; background: var(--c-sky-light); color: var(--c-text-mid); }
.tdch-steps .on { background: var(--c-text); color: #fff; }
.tdch-steps .done { background: var(--c-ok-bg); color: var(--c-ok); }
.tdch-scale { margin: 6px 0 18px; }
.tdch-scale input[type=range] { width: 100%; accent-color: var(--c-gold); height: 28px; }
.tdch-scale-ends { display: flex; justify-content: space-between; font-size: 13px; color: var(--c-text-mid); }
.tdch-scale-out { display: block; margin-top: 8px; font-size: 18px; }
.tdch-scale-out strong { font-family: 'Bebas Neue', Impact, sans-serif; font-weight: 400; font-size: 34px; vertical-align: -4px; margin-right: 4px; }
.tdch-alt { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0 0 20px; font-size: 14px; color: var(--c-text-mid); }
.tdch-chip { font: inherit; font-size: 14px; font-weight: 700; padding: 6px 12px; border-radius: 99px; border: 2px solid var(--c-sky-mid); background: #fff; color: var(--c-text); cursor: pointer; }
.tdch-chip.on { border-color: var(--c-text); background: var(--c-text); color: #fff; }
.tdch-hints { margin: 0 0 14px; padding-left: 20px; color: var(--c-text-mid); font-size: 15px; }
.tdch-hints li { margin: 2px 0; }
.tdch-card textarea {
  width: 100%; font: inherit; font-size: 16px; padding: 12px 14px; border-radius: 10px;
  border: 2px solid var(--c-sky-mid); resize: vertical; color: var(--c-text); background: #fff;
}
.tdch-card textarea:focus { outline: none; border-color: var(--c-sky); }
.tdch-reveal { text-align: left; }
.tdch-delta { display: flex; align-items: center; gap: 14px; font-family: 'Bebas Neue', Impact, sans-serif; font-size: 80px; line-height: 1; margin: 4px 0 8px; }
.tdch-delta .arrow { font-size: 48px; color: var(--c-gold); }
.tdch-real { margin: 14px 0; border: 1px solid var(--c-sky-mid); border-radius: 10px; padding: 0 14px; }
.tdch-real summary { cursor: pointer; font-weight: 800; padding: 12px 0; }
.tdch-real p { margin: 0 0 14px; }
.tdch-science, .tdch-ask span {
  font-size: 15px;
}
.tdch-science { background: var(--c-sky-light); border-radius: 10px; padding: 12px 14px; margin: 14px 0; }
.tdch-science > span, .tdch-ask span {
  display: block; font-size: 12px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; color: var(--c-text-mid); margin-bottom: 4px;
}
.tdch-turn { font-size: 19px; font-weight: 800; margin: 18px 0 0; padding-left: 14px; border-left: 4px solid var(--c-gold); }

/* Distortion + Daily */
.tdch-top { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; font-size: 14px; font-weight: 800; color: var(--c-text-mid); margin-bottom: 16px; }
.tdch-heads { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 18px; }
@media (max-width: 560px) { .tdch-heads { grid-template-columns: 1fr; } }
.tdch-heads > div {
  font-family: Georgia, 'Times New Roman', serif; font-weight: 700; font-size: 21px; line-height: 1.25;
  border: 2px solid var(--c-text); border-radius: 6px; padding: 14px 16px; background: #fdfdfb;
}
.tdch-heads span { display: block; font-family: 'Nunito', system-ui, sans-serif; font-size: 11px; letter-spacing: 2px; text-transform: uppercase; color: var(--c-text-mid); margin-bottom: 6px; }
.tdch-say {
  margin: 0 0 18px; padding: 16px 20px; background: var(--c-gold-light); border-left: 5px solid var(--c-gold);
  border-radius: 0 10px 10px 0; font-size: clamp(18px, 2.6vw, 21px); font-weight: 700; line-height: 1.45;
}
.tdch-say cite { display: block; margin-top: 8px; font-size: 14px; font-style: normal; font-weight: 600; color: var(--c-text-mid); }
.tdch-full mark { background: #ffe7a8; color: inherit; padding: 0 2px; }
.tdch-kind { display: inline-block; font-size: 12px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; background: var(--c-text); color: #fff; padding: 3px 10px; border-radius: 99px; margin-bottom: 10px; }
.tdch-opts { display: grid; grid-template-columns: 1fr; gap: 10px; }
.tdch-opts-4 { grid-template-columns: 1fr 1fr; }
@media (max-width: 560px) { .tdch-opts-4 { grid-template-columns: 1fr; } }
.tdch-opt {
  display: flex; align-items: center; gap: 12px; text-align: left; font: inherit; font-size: 16px; font-weight: 700;
  color: var(--c-text); background: #fff; border: 2px solid var(--c-sky-mid); border-radius: 10px;
  padding: 12px 14px; cursor: pointer; min-height: 52px; transition: border-color .15s, background .15s;
}
.tdch-opts-4 .tdch-opt { flex-direction: column; align-items: flex-start; gap: 2px; }
.tdch-v { font-size: 17px; font-weight: 800; }
.tdch-vdef { font-size: 13px; font-weight: 600; color: var(--c-text-mid); }
.tdch-opt:hover:not([disabled]) { border-color: var(--c-sky); background: var(--c-sky-light); }
.tdch-opt[disabled] { cursor: default; opacity: .6; }
.tdch-letter { flex: 0 0 28px; height: 28px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; background: var(--c-sky-light); color: var(--c-text-mid); font-size: 14px; font-weight: 800; }
.tdch-opt.is-right { opacity: 1; border-color: var(--c-ok); background: var(--c-ok-bg); }
.tdch-opt.is-right .tdch-letter { background: var(--c-ok); color: #fff; }
.tdch-opt.is-wrong { opacity: 1; border-color: var(--c-no); background: var(--c-no-bg); }
.tdch-opt.is-wrong .tdch-letter { background: var(--c-no); color: #fff; }
.tdch-feedback:empty { display: none; }
.tdch-feedback { margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--c-sky-mid); }
.tdch-verdict { font-size: 18px; margin: 0 0 10px; }
.tdch-verdict:focus { outline: none; }
.tdch-verdict.ok { color: var(--c-ok); }
.tdch-verdict.no { color: var(--c-no); }
.tdch-verdict.close { color: var(--c-close); }
.tdch-ask { margin: 14px 0 0; font-weight: 700; }
.tdch-come { margin: 14px 0 0; padding: 10px 14px; background: var(--c-sky-light); border-radius: 10px; font-weight: 700; }
.tdch-streak { font-size: 15px; color: var(--c-text); }
.tdch-streak strong { font-family: 'Bebas Neue', Impact, sans-serif; font-weight: 400; font-size: 24px; vertical-align: -2px; }

.tdch-chart { width: 100%; height: auto; margin: 0 0 12px; font-family: 'Nunito', system-ui, sans-serif; font-size: 12px; fill: var(--c-text-mid); }
.tdch-chart .g { stroke: #e3eff2; stroke-width: 1; }
.tdch-chart .line { fill: none; stroke: var(--c-text); stroke-width: 3; stroke-linejoin: round; }
.tdch-chart .spanA { stroke: #0f7f8e; stroke-width: 2; stroke-dasharray: 6 5; }
.tdch-chart .spanB { stroke: var(--c-gold); stroke-width: 5; stroke-linecap: round; }
.tdch-chart .dA { fill: #0f7f8e; } .tdch-chart .dB { fill: var(--c-gold); } .tdch-chart .dC { fill: var(--c-text); }
.tdch-chart .lbA { fill: #0f7f8e; font-weight: 800; } .tdch-chart .lbB { fill: #a26a00; font-weight: 800; }
.tdch-table { width: 100%; border-collapse: collapse; margin: 0 0 12px; font-size: 15px; }
.tdch-table th, .tdch-table td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--c-sky-mid); }
.tdch-table th { font-size: 12px; letter-spacing: 1px; text-transform: uppercase; color: var(--c-text-mid); }

.tdch-end { text-align: center; }
.tdch-big { font-family: 'Bebas Neue', Impact, sans-serif; font-size: 96px; line-height: 1; }
.tdch-big:focus { outline: none; }
.tdch-big span { font-size: 48px; color: var(--c-text-mid); }
.tdch-level { font-size: 20px; font-weight: 800; margin: 6px 0 14px; }
.tdch-recap { text-align: left; background: var(--c-gold-light); border-radius: 10px; padding: 14px 18px 14px 34px; margin: 0 0 14px; }
.tdch-recap li { margin: 4px 0; }
.tdch-end .tdch-actions { justify-content: center; }

/* Question-style labels on tool cards (labels="questions") */
.tool-card .tool-q-name { display: block; }

@media (prefers-reduced-motion: reduce) { .tdch-btn, .tdch-opt { transition: none; } }

/* v2.5 discernment record */
.tdch-record { margin-top: 14px; border: 1px solid var(--c-sky-mid); border-radius: 10px; padding: 12px 14px; }
.tdch-record > span { display: block; font-size: 12px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; color: var(--c-text-mid); margin-bottom: 6px; }
.tdch-record-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; font-size: 15px; }
@media (max-width: 560px) { .tdch-record-row { grid-template-columns: 1fr; } }
.tdch-record-row strong { font-family: 'Bebas Neue', Impact, sans-serif; font-weight: 400; font-size: 28px; display: block; line-height: 1; }
.tdch-record p { margin: 8px 0 0; font-weight: 700; }

/* v2.5 Lateral reading */
.tdch-lateral { max-width: 760px; margin: 0 auto; }
.tdlr-browser { border: 1px solid #c9d6da; border-radius: 10px; overflow: hidden; margin: 0 0 18px; box-shadow: 0 2px 10px rgba(26,54,64,.08); }
.tdlr-bar { display: flex; align-items: center; gap: 6px; background: #eef2f3; padding: 8px 10px; }
.tdlr-bar > span { width: 10px; height: 10px; border-radius: 50%; background: #c9d6da; }
.tdlr-url { flex: 1; margin-left: 8px; background: #fff; border-radius: 6px; padding: 3px 10px; font-family: 'DM Mono', monospace; font-size: 13px; color: #4b5c62; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tdlr-page { padding: 18px 20px; background: linear-gradient(180deg, #ffffff, #f4fbfc); }
.tdlr-brand { font-weight: 800; font-size: 20px; color: #0f5e69; letter-spacing: .3px; }
.tdlr-tag { display: inline-block; margin-top: 4px; font-size: 12px; font-weight: 700; color: #1e7a4c; background: #e6f5ec; padding: 2px 8px; border-radius: 99px; }
.tdlr-page h4 { font-family: Georgia, 'Times New Roman', serif; font-size: 22px; margin: 12px 0 6px; color: #1a2a30; }
.tdlr-page p { margin: 0; color: #4b5c62; }
.tdlr-browser.plain .tdlr-page { background: #fff; font-family: 'Times New Roman', serif; }
.tdlr-browser.plain .tdlr-brand { font-family: 'Times New Roman', serif; color: #00e; font-weight: 400; text-decoration: underline; font-size: 18px; }
.tdlr-browser.plain h4 { font-size: 19px; color: #000; }
.tdlr-browser.plain p { color: #000; }
.tdlr-search .tdlr-page { background: #fff; padding: 10px 20px; }
.tdlr-result { padding: 10px 0; border-bottom: 1px solid #eef2f3; }
.tdlr-result:last-child { border-bottom: none; }
.tdlr-src { font-size: 12px; color: #4b5c62; }
.tdlr-rt { font-size: 17px; font-weight: 700; color: #1a0dab; }
.tdlr-rs { font-size: 14px; color: #3c4043; margin-top: 2px; }
.tdlr-try { text-align: left; background: var(--c-sky-light); border-radius: 10px; padding: 14px 16px; margin: 14px 0 0; }
.tdlr-try label { display: block; font-weight: 800; margin-bottom: 8px; }
.tdlr-try-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tdlr-try-row input { flex: 1 1 220px; font: inherit; font-size: 16px; padding: 10px 12px; border: 2px solid var(--c-sky-mid); border-radius: 10px; }
.tdlr-try-row input:focus { outline: none; border-color: var(--c-sky); }

/* v2.5 Classroom check */
.tdtc-label { display: block; font-weight: 800; margin: 6px 0 6px; }
.tdtc-label span { font-weight: 600; color: var(--c-text-mid); }
.tdtc-input { font: inherit; font-size: 17px; padding: 10px 12px; border: 2px solid var(--c-sky-mid); border-radius: 10px; width: 100%; max-width: 320px; margin-bottom: 6px; }
.tdlr-try-row .tdtc-input { max-width: none; margin: 0; }
.tdtc-input:focus { outline: none; border-color: var(--c-sky); }
.tdtc-err { color: var(--c-no); font-weight: 700; min-height: 1.2em; margin: 4px 0 10px; }
.tdch-bar-wrap { height: 6px; background: var(--c-sky-light); border-radius: 3px; margin: -8px 0 16px; overflow: hidden; }
.tdch-bar-wrap span { display: block; height: 100%; background: var(--c-sky); transition: width .3s; }
.tdch-opt.is-picked { border-color: var(--c-text); background: var(--c-sky-light); box-shadow: inset 0 0 0 1px var(--c-text); }
.tdtc-q2 { margin-top: 18px; font-size: 18px; }
.tdtc-conf { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; }
@media (max-width: 560px) { .tdtc-conf { grid-template-columns: repeat(3, 1fr); } }
.tdtc-conf .tdch-chip { border-radius: 10px; padding: 8px 4px; display: flex; flex-direction: column; align-items: center; font-size: 16px; }
.tdtc-conf small { font-size: 11px; font-weight: 700; opacity: .8; }
.tdtc-scores { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 10px 0 14px; }
@media (max-width: 560px) { .tdtc-scores { grid-template-columns: 1fr; } }
.tdtc-scores > div { background: var(--c-sky-light); border-radius: 10px; padding: 12px; font-size: 14px; font-weight: 700; color: var(--c-text-mid); }
.tdtc-scores strong { display: block; font-family: 'Bebas Neue', Impact, sans-serif; font-weight: 400; font-size: 40px; line-height: 1; color: var(--c-text); }
.tdtc-scores strong.sm { display: inline; font-size: 22px; }
.tdtc-saved { background: var(--c-ok-bg); color: var(--c-ok); border-radius: 10px; padding: 8px 12px; font-weight: 700; }
.tdtc-key { list-style: none; padding: 0; margin: 0 0 12px; }
.tdtc-key li { display: flex; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--c-sky-mid); font-size: 15px; }
.tdtc-key li:last-child { border-bottom: none; }
.tdtc-mark { flex: 0 0 24px; height: 24px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; color: #fff; font-weight: 800; font-size: 13px; }
.tdtc-key li.ok .tdtc-mark { background: var(--c-ok); }
.tdtc-key li.no .tdtc-mark { background: var(--c-no); }
.tdtc-pct { flex: 0 0 48px; font-weight: 800; }
.tdtc-table td:not(:first-child), .tdtc-table th:not(:first-child) { text-align: right; }
.tdtc-chg { font-weight: 800; }
.tdtc-chg.up { color: var(--c-ok); } .tdtc-chg.down { color: var(--c-no); }
.tdtc-out { margin-top: 14px; }