/* DART Courses — black and white, Poppins, to match drubelabs / DART. */
.dartc {
	--dartc-ink: #0a0a0a;
	--dartc-paper: #ffffff;
	--dartc-mute: #6b6b6b;
	--dartc-line: #e3e3e3;
	--dartc-soft: #f5f5f5;
	font-family: 'Poppins', system-ui, sans-serif;
	color: var(--dartc-ink);
	line-height: 1.7;
}
.dartc h2, .dartc h3, .dartc h4 { font-family: 'Poppins', system-ui, sans-serif; font-weight: 700; letter-spacing: -0.01em; line-height: 1.25; margin: 2em 0 0.6em; }
.dartc h2 { font-size: 1.6rem; }
.dartc h3 { font-size: 1.2rem; }
.dartc a { color: var(--dartc-ink); }
.dartc-body p, .dartc-body li { font-size: 1.02rem; }
.dartc-body img { max-width: 100%; height: auto; }
.dartc-body table { border-collapse: collapse; width: 100%; margin: 1.2em 0; font-size: 0.95rem; }
.dartc-body th, .dartc-body td { border: 1px solid var(--dartc-line); padding: 0.55em 0.8em; text-align: left; vertical-align: top; }
.dartc-body th { background: var(--dartc-ink); color: var(--dartc-paper); font-weight: 600; }
.dartc-body blockquote { border-left: 4px solid var(--dartc-ink); margin: 1.4em 0; padding: 0.3em 1.2em; background: var(--dartc-soft); }
.dartc-body .arithmatex { overflow-x: auto; }
.dartc-body div.arithmatex { margin: 1.2em 0; padding: 0.6em 0; }
.dartc-body code { font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 0.9em; background: var(--dartc-soft); padding: 0.1em 0.35em; border-radius: 3px; }
.dartc-body pre { position: relative; background: var(--dartc-soft) !important; border: 1px solid var(--dartc-line); border-radius: 4px; padding: 1.1em 1.2em; overflow: auto; max-height: 640px; font-size: 0.86rem; line-height: 1.55; }
.dartc-body pre code { background: none; padding: 0; font-size: inherit; }
.dartc-copy { position: sticky; float: right; top: 0; font: 600 0.75rem 'Poppins', sans-serif; border: 1px solid var(--dartc-ink); background: var(--dartc-paper); padding: 0.2em 0.7em; cursor: pointer; border-radius: 2px; }
.dartc-body details { border: 1px solid var(--dartc-line); border-radius: 4px; padding: 0.7em 1em; margin: 0.8em 0; }
.dartc-body details summary { cursor: pointer; font-weight: 600; }
.dartc-body .admonition { border: 2px solid var(--dartc-ink); padding: 0.8em 1.1em; margin: 1.4em 0; border-radius: 4px; }
.dartc-body .admonition-title { font-weight: 700; text-transform: uppercase; font-size: 0.78rem; letter-spacing: 0.08em; margin: 0 0 0.3em; }

.dartc-meta { display: flex; flex-wrap: wrap; gap: 0.5em; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--dartc-mute); margin-bottom: 1.2em; }
.dartc-crumb { font-size: 0.85rem; color: var(--dartc-mute); display: flex; gap: 0.5em; margin-bottom: 1em; }
.dartc-crumb a { font-weight: 600; text-decoration: none; }

.dartc-btn { display: inline-block; font: 600 0.92rem 'Poppins', sans-serif; padding: 0.7em 1.3em; border: 2px solid var(--dartc-ink); background: var(--dartc-paper); color: var(--dartc-ink) !important; text-decoration: none !important; border-radius: 2px; cursor: pointer; transition: background .15s, color .15s; }
.dartc-btn:hover, .dartc-btn--solid { background: var(--dartc-ink); color: var(--dartc-paper) !important; }
.dartc-btn--solid:hover { background: #333; border-color: #333; }
.dartc-btn.is-done { background: var(--dartc-paper); color: var(--dartc-ink) !important; }

.dartc-progress { margin: 1em 0 1.4em; }
.dartc-progress__bar { height: 8px; background: var(--dartc-line); border-radius: 4px; overflow: hidden; }
.dartc-progress__bar span { display: block; height: 100%; background: var(--dartc-ink); transition: width .3s; }
.dartc-progress__label { font-size: 0.8rem; color: var(--dartc-mute); margin-top: 0.35em; }

.dartc-buy { border: 2px solid var(--dartc-ink); padding: 1.3em 1.4em; margin: 1.4em 0; display: flex; flex-wrap: wrap; align-items: center; gap: 0.8em 1em; }
.dartc-buy__price { font-size: 1.8rem; font-weight: 700; margin-right: auto; }
.dartc-buy__note { flex-basis: 100%; margin: 0; font-size: 0.85rem; color: var(--dartc-mute); }
.dartc-locked { padding: 1em 0; }

.dartc-lessons { list-style: none; counter-reset: l; padding: 0; margin: 0; border-top: 1px solid var(--dartc-line); }
.dartc-lessons__item { counter-increment: l; display: flex; align-items: center; gap: 1em; padding: 0.8em 0; border-bottom: 1px solid var(--dartc-line); }
.dartc-lessons__item::before { content: counter(l, decimal-leading-zero); font: 700 0.8rem 'JetBrains Mono', monospace; width: 2.2em; color: var(--dartc-mute); }
.dartc-lessons__item a { flex: 1; text-decoration: none; font-weight: 600; }
.dartc-lessons__item.is-locked a { color: var(--dartc-mute); }
.dartc-lessons__item.is-done::before { content: '✓'; color: var(--dartc-ink); }
.dartc-lessons__item.is-current { background: var(--dartc-soft); }
.dartc-lessons__state { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--dartc-mute); }
.dartc-outcomes { padding-left: 1.2em; }
.dartc-prereq { background: var(--dartc-soft); padding: 0.8em 1em; }

.dartc-pager { display: flex; justify-content: space-between; gap: 1em; margin: 2.4em 0 1em; flex-wrap: wrap; }
.dartc-outline { margin-top: 1.4em; border: 1px solid var(--dartc-line); padding: 0.6em 1em; }
.dartc-outline summary { cursor: pointer; font-weight: 600; }
.dartc-complete { margin: 2em 0 0; }
.dartc-note { color: var(--dartc-mute); }

.dartc-sim { display: flex; align-items: center; justify-content: space-between; gap: 1em; flex-wrap: wrap; border: 2px dashed var(--dartc-ink); padding: 1em 1.2em; margin: 1.4em 0; }
.dartc-sim span { font-size: 0.85rem; color: var(--dartc-mute); }

.dartc-filter { display: flex; flex-wrap: wrap; gap: 0.5em; margin-bottom: 1.4em; }
.dartc-filter button { font: 600 0.82rem 'Poppins', sans-serif; border: 1px solid var(--dartc-ink); background: var(--dartc-paper); color: var(--dartc-ink); padding: 0.45em 1em; border-radius: 999px; cursor: pointer; }
.dartc-filter button.is-active { background: var(--dartc-ink); color: var(--dartc-paper); }
.dartc-grid { display: grid; grid-template-columns: repeat(var(--dartc-cols, 3), minmax(0, 1fr)); gap: 1.2em; }
@media (max-width: 900px) { .dartc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .dartc-grid { grid-template-columns: 1fr; } .dartc-buy__price { flex-basis: 100%; } }
.dartc-card { border: 1px solid var(--dartc-ink); padding: 1.2em; display: flex; flex-direction: column; background: var(--dartc-paper); }
.dartc-card__track { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--dartc-mute); }
.dartc-card__title { margin: 0.4em 0 0.5em !important; font-size: 1.1rem !important; }
.dartc-card__title a { text-decoration: none; }
.dartc-card__text { font-size: 0.9rem; color: #333; flex: 1; margin: 0 0 1em; }
.dartc-card__foot { display: flex; justify-content: space-between; font-size: 0.85rem; border-top: 1px solid var(--dartc-line); padding-top: 0.7em; }

/* ---------- Buttons (extra) ---------- */
.dartc-btn--block { display: block; width: 100%; text-align: center; }
.dartc-btn--invert { background: #fff; color: #0a0a0a !important; border-color: #fff; }
.dartc-btn--invert:hover { background: #e9e9e9; }
.dartc-btn--ghost { background: transparent; color: #fff !important; border-color: #fff; }
.dartc-btn--ghost:hover { background: #fff; color: #0a0a0a !important; }
.dartc-actions { display: flex; flex-wrap: wrap; gap: .7em; margin-top: 1.4em; }
.dartc-eyebrow { display: block; font-size: .74rem; font-weight: 600; text-transform: uppercase; letter-spacing: .12em; color: var(--dartc-mute); margin-bottom: .6em; }
.dartc-card__btn { margin-top: 1em; text-align: center; }

/* ---------- Forms ---------- */
.dartc-auth { max-width: 640px; margin: 2em auto; }
.dartc-form { border: 1px solid var(--dartc-ink); padding: 2em; background: var(--dartc-paper); }
.dartc-form--wide { border: 0; padding: 0; }
.dartc-form h2 { margin-top: 0; }
.dartc-form h3 { margin: 1.6em 0 .6em; }
.dartc-form__lead { color: var(--dartc-mute); margin-top: -.3em; }
.dartc-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 1em; }
@media (max-width: 600px) { .dartc-row { grid-template-columns: 1fr; } .dartc-form { padding: 1.3em; } }
.dartc-field { margin-bottom: 1.1em; }
.dartc-field label, .dartc-field__label { display: block; font-weight: 600; font-size: .88rem; margin-bottom: .35em; }
.dartc-field small { font-weight: 400; color: var(--dartc-mute); }
.dartc-field input[type=text], .dartc-field input[type=email], .dartc-field input[type=tel], .dartc-field input[type=password] {
	width: 100%; box-sizing: border-box; font: 400 1rem 'Poppins', system-ui, sans-serif; padding: .75em .9em; border: 1px solid #bdbdbd; border-radius: 2px; background: #fff; color: var(--dartc-ink);
}
.dartc-field input:focus { outline: 2px solid var(--dartc-ink); outline-offset: 1px; border-color: var(--dartc-ink); }
.dartc-field.is-bad input { border-color: #b00020; }
.dartc-field__hint { display: block; font-size: .78rem; color: var(--dartc-mute); margin-top: .3em; }
.dartc-field__err { display: block; font-size: .8rem; color: #b00020; margin-top: .3em; }
.dartc-choices { display: flex; flex-wrap: wrap; gap: .5em; }
.dartc-choice { display: inline-flex !important; align-items: center; gap: .45em; border: 1px solid #bdbdbd; padding: .5em .9em; border-radius: 999px; font-weight: 500 !important; cursor: pointer; margin: 0 !important; }
.dartc-choice:has(input:checked) { border-color: var(--dartc-ink); background: var(--dartc-ink); color: #fff; }
.dartc-choice input { accent-color: var(--dartc-ink); }
.dartc-check { display: flex !important; gap: .55em; align-items: flex-start; font-weight: 400 !important; font-size: .9rem; }
.dartc-check input { margin-top: .3em; accent-color: var(--dartc-ink); }
.dartc-form__split { display: flex; justify-content: space-between; align-items: center; gap: 1em; margin-bottom: 1.2em; font-size: .9rem; flex-wrap: wrap; }
.dartc-form__alt { text-align: center; margin: 1.2em 0 0; font-size: .92rem; }
.dartc-form__alt a { font-weight: 600; }
.dartc-hp { position: absolute !important; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.dartc-alert { border: 2px solid #b00020; color: #b00020; padding: .8em 1em; margin-bottom: 1.2em; font-size: .92rem; }
.dartc-alert--ok { border-color: var(--dartc-ink); color: var(--dartc-ink); background: var(--dartc-soft); }

/* ---------- Account ---------- */
.dartc-account { max-width: 1000px; margin: 1em auto; }
.dartc-account__head { display: flex; justify-content: space-between; align-items: flex-end; gap: 1em; flex-wrap: wrap; border-bottom: 1px solid var(--dartc-line); padding-bottom: 1em; }
.dartc-account__head h2 { margin: 0; }
.dartc-account__head p { margin: .3em 0 0; color: var(--dartc-mute); }
.dartc-tabs { display: flex; gap: 1.6em; margin: 1.2em 0 1.6em; border-bottom: 1px solid var(--dartc-line); }
.dartc-tabs a { text-decoration: none; padding: .6em 0; font-weight: 600; color: var(--dartc-mute); border-bottom: 3px solid transparent; margin-bottom: -1px; }
.dartc-tabs a.is-active { color: var(--dartc-ink); border-bottom-color: var(--dartc-ink); }

/* ---------- Home ---------- */
.dartc-home { line-height: 1.6; }
.dartc-wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; box-sizing: border-box; }
.dartc-hero { padding: 72px 0 56px; border-bottom: 1px solid var(--dartc-line); }
.dartc-hero__grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: center; }
.dartc-hero__title { font: 700 clamp(2.1rem, 5vw, 3.6rem)/1.08 'Poppins', system-ui, sans-serif; letter-spacing: -.03em; margin: 0 0 .4em; }
.dartc-hero__lead { font-size: 1.15rem; color: #333; max-width: 36em; margin: 0; }
.dartc-jump { display: flex; flex-wrap: wrap; gap: .4em 1.4em; margin-top: 2em; font-size: .88rem; }
.dartc-jump a { color: var(--dartc-mute); text-decoration: none; border-bottom: 1px solid var(--dartc-line); }
.dartc-jump a:hover { color: var(--dartc-ink); border-color: var(--dartc-ink); }
.dartc-hero__panel { display: grid; gap: 16px; }
.dartc-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--dartc-ink); border: 1px solid var(--dartc-ink); margin: 0; }
.dartc-stats div { background: #fff; padding: 22px 20px; }
.dartc-stats dt { font: 700 2.2rem/1 'Poppins', sans-serif; margin: 0 0 .25em; }
.dartc-stats dd { margin: 0; font-size: .85rem; color: var(--dartc-mute); }
.dartc-resume { background: var(--dartc-ink); color: #fff; padding: 22px; }
.dartc-resume h3 { margin: 0 0 .4em; color: #fff; }
.dartc-resume .dartc-eyebrow, .dartc-resume .dartc-progress__label { color: #bbb; }
.dartc-resume .dartc-progress__bar { background: #444; }
.dartc-resume .dartc-progress__bar span { background: #fff; }
.dartc-resume .dartc-btn--solid { background: #fff; color: #0a0a0a !important; border-color: #fff; }
.dartc-sec { padding: 72px 0; }
.dartc-sec--tight { padding: 48px 0; }
.dartc-sec--alt { background: var(--dartc-soft); }
.dartc-sec__head { display: flex; justify-content: space-between; align-items: flex-end; gap: 1.5em; margin-bottom: 32px; flex-wrap: wrap; }
.dartc-sec__title { margin: 0 !important; font-size: clamp(1.6rem, 3vw, 2.3rem) !important; letter-spacing: -.02em; }
.dartc-sec__lead { margin: .6em 0 0; max-width: 44em; color: #444; }
.dartc-more { font-weight: 600; text-decoration: none; border-bottom: 2px solid var(--dartc-ink); white-space: nowrap; }
.dartc-chips { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.dartc-chip { display: block; border: 1px solid var(--dartc-ink); padding: 16px 18px; text-decoration: none; transition: background .15s, color .15s; }
.dartc-chip strong { display: block; }
.dartc-chip span { font-size: .82rem; color: var(--dartc-mute); }
.dartc-chip:hover { background: var(--dartc-ink); color: #fff; }
.dartc-chip:hover span { color: #ccc; }
.dartc-facts { list-style: none; padding: 0; margin: 0 0 1em; font-size: .82rem; color: var(--dartc-mute); display: flex; flex-wrap: wrap; gap: .3em .9em; }
.dartc-card__foot a { font-weight: 600; text-decoration: none; }
.dartc-split { display: grid; grid-template-columns: 1.3fr 1fr; gap: 32px; align-items: start; }
.dartc-offers { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--dartc-line); border: 1px solid var(--dartc-line); }
.dartc-offer { background: #fff; padding: 24px; }
.dartc-offer h3 { margin: 0 0 .4em !important; font-size: 1.05rem !important; }
.dartc-offer p { margin: 0; font-size: .92rem; color: #444; }
.dartc-panel { border: 2px solid var(--dartc-ink); padding: 24px; }
.dartc-panel h3 { margin-top: 0 !important; }
.dartc-linklist { list-style: none; padding: 0; margin: 0 0 1em; }
.dartc-linklist li { display: flex; justify-content: space-between; gap: 1em; padding: .55em 0; border-bottom: 1px solid var(--dartc-line); font-size: .92rem; }
.dartc-linklist a { font-weight: 600; text-decoration: none; }
.dartc-linklist span { color: var(--dartc-mute); white-space: nowrap; }
.dartc-mentor { text-align: left; }
.dartc-mentor__img { width: 100%; aspect-ratio: 1; object-fit: cover; filter: grayscale(1); display: block; }
.dartc-mentor__img--blank { background: var(--dartc-ink); color: #fff; display: grid; place-items: center; font: 700 3rem 'Poppins', sans-serif; }
.dartc-mentor h3 { margin: .8em 0 .1em !important; font-size: 1.05rem !important; }
.dartc-mentor__role { margin: 0; font-size: .88rem; }
.dartc-mentor__teach { margin: .3em 0 0; font-size: .82rem; color: var(--dartc-mute); }
.dartc-steps { list-style: none; counter-reset: s; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.dartc-steps li { counter-increment: s; border-top: 2px solid var(--dartc-ink); padding-top: 16px; }
.dartc-steps li::before { content: counter(s, decimal-leading-zero); font: 700 .85rem 'JetBrains Mono', monospace; color: var(--dartc-mute); }
.dartc-steps h3 { margin: .4em 0 .3em !important; font-size: 1.05rem !important; }
.dartc-steps p { margin: 0; font-size: .92rem; color: #444; }
.dartc-join { background: var(--dartc-ink); color: #fff; padding: 64px 0; }
.dartc-join__inner { display: flex; justify-content: space-between; align-items: center; gap: 1.5em; flex-wrap: wrap; }
.dartc-join h2 { color: #fff; margin: 0 !important; font-size: clamp(1.6rem, 3.4vw, 2.5rem) !important; letter-spacing: -.02em; }
.dartc-join .dartc-actions { margin: 0; }
@media (max-width: 900px) {
	.dartc-hero__grid, .dartc-split { grid-template-columns: 1fr; }
	.dartc-steps { grid-template-columns: 1fr 1fr; }
	.dartc-hero { padding: 48px 0 40px; }
	.dartc-sec { padding: 52px 0; }
}
@media (max-width: 600px) {
	.dartc-offers, .dartc-steps { grid-template-columns: 1fr; }
	.dartc-wrap { padding: 0 18px; }
}

@media (max-width: 900px) { .dartc-grid--mentors { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* ---------- Prices & payment ---------- */
.dartc-price { display: inline-flex; align-items: baseline; gap: .45em; flex-wrap: wrap; }
.dartc-price strong { font-weight: 700; }
.dartc-price s { color: var(--dartc-mute); font-weight: 400; font-size: .7em; }
.dartc-price__off { font-style: normal; font-size: .62em; font-weight: 700; background: var(--dartc-ink); color: #fff; padding: .2em .55em; border-radius: 999px; letter-spacing: .02em; }
.dartc-card__foot .dartc-price { font-size: 1rem; }
.dartc-card__foot .dartc-price s { font-size: .82em; }
.dartc-card__foot .dartc-price__off { font-size: .7em; }
button.dartc-btn[disabled] { opacity: .6; cursor: progress; }
.dartc-pay-status { flex-basis: 100%; margin: 0; font-size: .9rem; font-weight: 600; }
.dartc-pay-status.is-error { color: #b00020; }