/**
 * Tha-Shed Learning Tools.
 *
 * Colours come from custom properties so the dark/red Dispatch theme can retune
 * everything from one place without touching component rules.
 */

.shed-lt-flashcards,
.shed-lt-notes,
.shed-lt-hub,
.shed-lt-notice,
.shed-lt-gate,
.shed-lt-tutnav {
	--shed-lt-bg: #16161a;
	--shed-lt-surface: #1e1e24;
	--shed-lt-border: #33333d;
	--shed-lt-text: #f2f2f5;
	--shed-lt-muted: #a1a1ad;
	--shed-lt-accent: #d92d2d;
	--shed-lt-accent-text: #fff;
	--shed-lt-radius: 10px;

	box-sizing: border-box;
	color: var(--shed-lt-text);
	font-size: 16px;
	line-height: 1.6;
	margin: 2rem 0;
}

.shed-lt-flashcards *,
.shed-lt-notes *,
.shed-lt-hub *,
.shed-lt-notice * {
	box-sizing: inherit;
}

/* Light theme, for anywhere the dark chrome isn't in play. */
@media ( prefers-color-scheme: light ) {
	.shed-lt-flashcards,
	.shed-lt-notes,
	.shed-lt-hub,
	.shed-lt-notice,
	.shed-lt-gate,
	.shed-lt-tutnav {
		--shed-lt-bg: #fff;
		--shed-lt-surface: #f6f6f8;
		--shed-lt-border: #dcdce4;
		--shed-lt-text: #1a1a1f;
		--shed-lt-muted: #5c5c6b;
	}
}

/* ---------- Shared ---------- */

.shed-lt-btn {
	display: inline-block;
	padding: 0.6rem 1.15rem;
	border: 1px solid var(--shed-lt-accent);
	border-radius: var(--shed-lt-radius);
	background: var(--shed-lt-accent);
	color: var(--shed-lt-accent-text);
	font-size: 0.95rem;
	font-weight: 600;
	line-height: 1.2;
	text-decoration: none;
	cursor: pointer;
}

.shed-lt-btn:hover,
.shed-lt-btn:focus-visible {
	filter: brightness( 1.12 );
	color: var(--shed-lt-accent-text);
}

.shed-lt-btn--ghost {
	background: transparent;
	color: var(--shed-lt-text);
	border-color: var(--shed-lt-border);
}

.shed-lt-gate,
.shed-lt-notice {
	padding: 1.25rem 1.5rem;
	border: 1px solid var(--shed-lt-border);
	border-left: 4px solid var(--shed-lt-accent);
	border-radius: var(--shed-lt-radius);
	background: var(--shed-lt-surface);
}

.shed-lt-notice-title {
	margin: 0 0 0.35rem;
	font-weight: 700;
}

/* ---------- Flashcards ---------- */

.shed-lt-fc-title {
	margin: 0 0 0.75rem;
}

.shed-lt-fc-status {
	padding: 1rem 0;
	color: var(--shed-lt-muted);
}

.shed-lt-fc-progress {
	margin-bottom: 0.6rem;
	color: var(--shed-lt-muted);
	font-size: 0.85rem;
	text-transform: uppercase;
	letter-spacing: 0.04em;
}

.shed-lt-fc-card {
	padding: 1.75rem;
	min-height: 8rem;
	border: 1px solid var(--shed-lt-border);
	border-radius: var(--shed-lt-radius);
	background: var(--shed-lt-surface);
}

.shed-lt-fc-question {
	margin: 0;
	font-size: 1.3rem;
	font-weight: 600;
}

.shed-lt-fc-hint {
	margin: 0.75rem 0 0;
	color: var(--shed-lt-muted);
	font-size: 0.95rem;
	font-style: italic;
}

.shed-lt-fc-answer {
	margin-top: 1.25rem;
	padding-top: 1.25rem;
	border-top: 1px solid var(--shed-lt-border);
}

.shed-lt-fc-answer > :first-child {
	margin-top: 0;
}

.shed-lt-fc-answer pre,
.shed-lt-fc-answer code {
	font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
	font-size: 0.9em;
}

.shed-lt-fc-answer pre {
	overflow-x: auto;
	padding: 0.85rem 1rem;
	border-radius: 8px;
	background: var(--shed-lt-bg);
}

.shed-lt-fc-actions,
.shed-lt-fc-grades {
	margin-top: 1.1rem;
}

.shed-lt-fc-grade-prompt {
	margin: 0 0 0.6rem;
	color: var(--shed-lt-muted);
	font-size: 0.9rem;
}

.shed-lt-fc-grades {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
	align-items: center;
}

.shed-lt-fc-grade-prompt {
	flex: 1 0 100%;
}

.shed-lt-grade {
	flex: 1 1 auto;
	min-width: 5.5rem;
	padding: 0.6rem 0.9rem;
	border: 1px solid var(--shed-lt-border);
	border-radius: var(--shed-lt-radius);
	background: var(--shed-lt-surface);
	color: var(--shed-lt-text);
	font-size: 0.95rem;
	font-weight: 600;
	cursor: pointer;
}

.shed-lt-grade:hover,
.shed-lt-grade:focus-visible {
	border-color: var(--shed-lt-accent);
}

/* Colour carries meaning here, but the button labels say it too. */
.shed-lt-grade--again { border-bottom: 3px solid #d92d2d; }
.shed-lt-grade--hard  { border-bottom: 3px solid #d98b2d; }
.shed-lt-grade--good  { border-bottom: 3px solid #4a9d5f; }
.shed-lt-grade--easy  { border-bottom: 3px solid #3d7fd9; }

.shed-lt-fc-done {
	padding: 1.5rem;
	border: 1px solid var(--shed-lt-border);
	border-radius: var(--shed-lt-radius);
	background: var(--shed-lt-surface);
}

.shed-lt-fc-done-msg {
	margin: 0;
}

/* ---------- Cornell notes ---------- */

.shed-lt-notes-wrap {
	border: 1px solid var(--shed-lt-border);
	border-radius: var(--shed-lt-radius);
	background: var(--shed-lt-surface);
}

.shed-lt-notes-toggle {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
	align-items: center;
	justify-content: space-between;
	padding: 0.9rem 1.25rem;
	font-weight: 600;
	cursor: pointer;
}

.shed-lt-notes-saved {
	color: var(--shed-lt-muted);
	font-size: 0.85rem;
	font-weight: 400;
}

.shed-lt-notes-grid {
	display: grid;
	/* Cornell's narrow cue column beside the wider notes column. */
	grid-template-columns: 1fr 2fr;
	gap: 1rem;
	padding: 0 1.25rem;
}

.shed-lt-notes-summary {
	padding: 1rem 1.25rem 0;
}

.shed-lt-notes label {
	display: block;
	margin-bottom: 0.35rem;
	font-size: 0.9rem;
	font-weight: 600;
}

.shed-lt-notes label span {
	display: block;
	color: var(--shed-lt-muted);
	font-size: 0.8rem;
	font-weight: 400;
}

.shed-lt-field {
	width: 100%;
	padding: 0.7rem 0.85rem;
	border: 1px solid var(--shed-lt-border);
	border-radius: 8px;
	background: var(--shed-lt-bg);
	color: var(--shed-lt-text);
	font-family: inherit;
	font-size: 0.95rem;
	line-height: 1.55;
	resize: vertical;
}

.shed-lt-field:focus-visible {
	outline: 2px solid var(--shed-lt-accent);
	outline-offset: 1px;
}

.shed-lt-notes-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
	padding: 1.1rem 1.25rem 1.25rem;
}

@media ( max-width: 640px ) {
	.shed-lt-notes-grid {
		grid-template-columns: 1fr;
	}
}

/* ---------- Study tools hub ---------- */

.shed-lt-hub-section + .shed-lt-hub-section {
	margin-top: 2.25rem;
}

.shed-lt-hub-heading {
	margin: 0 0 0.9rem;
	font-size: 1.05rem;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--shed-lt-muted);
}

.shed-lt-hub-grid {
	display: grid;
	grid-template-columns: repeat( auto-fit, minmax( 15rem, 1fr ) );
	gap: 1rem;
	margin: 0;
	padding: 0;
	list-style: none;
}

.shed-lt-hub-card {
	margin: 0;
}

.shed-lt-hub-link {
	display: block;
	height: 100%;
	padding: 1.15rem 1.25rem;
	border: 1px solid var(--shed-lt-border);
	border-radius: var(--shed-lt-radius);
	background: var(--shed-lt-surface);
	color: var(--shed-lt-text);
	text-decoration: none;
}

.shed-lt-hub-link:hover,
.shed-lt-hub-link:focus-visible {
	border-color: var(--shed-lt-accent);
	color: var(--shed-lt-text);
}

.shed-lt-hub-title {
	display: block;
	margin-bottom: 0.3rem;
	font-weight: 700;
}

.shed-lt-hub-desc {
	display: block;
	color: var(--shed-lt-muted);
	font-size: 0.9rem;
}

/* ---------- Tutorial series navigation ---------- */

.shed-lt-tutnav {
	margin-top: 2.5rem;
	padding-top: 1.5rem;
	border-top: 1px solid var(--shed-lt-border);
}

.shed-lt-tutnav-position {
	margin: 0 0 0.9rem;
	color: var(--shed-lt-muted);
	font-size: 0.85rem;
	text-transform: uppercase;
	letter-spacing: 0.05em;
}

.shed-lt-tutnav-links {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 1rem;
}

.shed-lt-tutnav-link {
	display: block;
	padding: 1rem 1.15rem;
	border: 1px solid var(--shed-lt-border);
	border-radius: var(--shed-lt-radius);
	background: var(--shed-lt-surface);
	color: var(--shed-lt-text);
	text-decoration: none;
}

.shed-lt-tutnav-link:hover,
.shed-lt-tutnav-link:focus-visible {
	border-color: var(--shed-lt-accent);
	color: var(--shed-lt-text);
}

/* Keeps "Next" right-aligned even when there is no previous link. */
.shed-lt-tutnav-link--next {
	text-align: right;
}

.shed-lt-tutnav-link--empty {
	border: none;
	background: none;
}

.shed-lt-tutnav-dir {
	display: block;
	margin-bottom: 0.25rem;
	color: var(--shed-lt-muted);
	font-size: 0.8rem;
	text-transform: uppercase;
	letter-spacing: 0.05em;
}

.shed-lt-tutnav-title {
	display: block;
	font-weight: 600;
	line-height: 1.35;
}

.shed-lt-tutnav-cta {
	margin: 1.25rem 0 0;
	color: var(--shed-lt-muted);
	font-size: 0.95rem;
}

@media ( max-width: 560px ) {
	.shed-lt-tutnav-links {
		grid-template-columns: 1fr;
	}
	.shed-lt-tutnav-link--next {
		text-align: left;
	}
}

.shed-lt-hub-lede {
	margin: -0.35rem 0 1rem;
	max-width: 60ch;
	color: var(--shed-lt-muted);
	font-size: 0.95rem;
}

/* ---------- Subject landing pages ---------- */

.shed-lt-subject {
	--shed-lt-bg: #16161a;
	--shed-lt-surface: #1e1e24;
	--shed-lt-border: #33333d;
	--shed-lt-text: #f2f2f5;
	--shed-lt-muted: #a1a1ad;
	--shed-lt-accent: #d92d2d;
	--shed-lt-accent-text: #fff;
	--shed-lt-radius: 10px;

	box-sizing: border-box;
	color: var(--shed-lt-text);
	line-height: 1.6;
}

@media ( prefers-color-scheme: light ) {
	.shed-lt-subject {
		--shed-lt-bg: #fff;
		--shed-lt-surface: #f6f6f8;
		--shed-lt-border: #dcdce4;
		--shed-lt-text: #1a1a1f;
		--shed-lt-muted: #5c5c6b;
	}
}

.shed-lt-subject * {
	box-sizing: inherit;
}

.shed-lt-subj-hero {
	padding: 0 0 1.75rem;
	border-bottom: 1px solid var(--shed-lt-border);
}

.shed-lt-subj-eyebrow {
	display: block;
	margin-bottom: 0.5rem;
	color: var(--shed-lt-accent);
	font-size: 0.85rem;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.08em;
}

.shed-lt-subj-headline {
	margin: 0 0 0.75rem;
	font-size: clamp( 1.7rem, 4vw, 2.6rem );
	line-height: 1.15;
}

.shed-lt-subj-promise {
	margin: 0 0 1.5rem;
	max-width: 62ch;
	color: var(--shed-lt-muted);
	font-size: 1.08rem;
}

.shed-lt-subj-cta-row {
	display: flex;
	flex-wrap: wrap;
	gap: 0.65rem;
	margin: 0;
}

.shed-lt-subj-section {
	margin-top: 2.5rem;
}

.shed-lt-subj-outcomes {
	margin: 0;
	padding: 0;
	max-width: 70ch;
	list-style: none;
}

.shed-lt-subj-outcomes li {
	position: relative;
	margin-bottom: 0.6rem;
	padding-left: 1.75rem;
}

/* Check mark drawn in CSS so there is no image dependency. */
.shed-lt-subj-outcomes li::before {
	content: "";
	position: absolute;
	top: 0.45em;
	left: 0.2rem;
	width: 0.5rem;
	height: 0.85rem;
	border-right: 2px solid var(--shed-lt-accent);
	border-bottom: 2px solid var(--shed-lt-accent);
	transform: rotate( 45deg );
}

.shed-lt-subj-close {
	margin-top: 2.75rem;
	padding: 1.75rem;
	border: 1px solid var(--shed-lt-border);
	border-radius: var(--shed-lt-radius);
	background: var(--shed-lt-surface);
	text-align: center;
}

.shed-lt-subj-close-text {
	margin: 0 auto 1rem;
	max-width: 55ch;
	color: var(--shed-lt-muted);
}

.shed-lt-subj-close p:last-child {
	display: flex;
	flex-wrap: wrap;
	gap: 0.65rem;
	justify-content: center;
	margin: 0;
}

/* ---------- My Learning dashboard ---------- */

.shed-lt-dash {
	--shed-lt-bg: #16161a;
	--shed-lt-surface: #1e1e24;
	--shed-lt-border: #33333d;
	--shed-lt-text: #f2f2f5;
	--shed-lt-muted: #a1a1ad;
	--shed-lt-accent: #d92d2d;
	--shed-lt-accent-text: #fff;
	--shed-lt-radius: 10px;

	box-sizing: border-box;
	color: var(--shed-lt-text);
	line-height: 1.6;
}

@media ( prefers-color-scheme: light ) {
	.shed-lt-dash {
		--shed-lt-bg: #fff;
		--shed-lt-surface: #f6f6f8;
		--shed-lt-border: #dcdce4;
		--shed-lt-text: #1a1a1f;
		--shed-lt-muted: #5c5c6b;
	}
}

.shed-lt-dash * {
	box-sizing: inherit;
}

.shed-lt-dash-head {
	padding-bottom: 1.5rem;
	border-bottom: 1px solid var(--shed-lt-border);
}

.shed-lt-dash-stats {
	display: grid;
	grid-template-columns: repeat( auto-fit, minmax( 8.5rem, 1fr ) );
	gap: 1rem;
}

.shed-lt-dash-stat {
	padding: 1.1rem 1.25rem;
	border: 1px solid var(--shed-lt-border);
	border-radius: var(--shed-lt-radius);
	background: var(--shed-lt-surface);
	text-align: center;
}

.shed-lt-dash-num {
	display: block;
	font-size: 2rem;
	font-weight: 700;
	line-height: 1.1;
}

.shed-lt-dash-label {
	display: block;
	margin-top: 0.25rem;
	color: var(--shed-lt-muted);
	font-size: 0.85rem;
	text-transform: uppercase;
	letter-spacing: 0.04em;
}

.shed-lt-dash-cta {
	margin: 1.25rem 0 0;
}

.shed-lt-dash-done {
	margin: 1.25rem 0 0;
	color: var(--shed-lt-muted);
}

/* ---------- Guest preview note ---------- */

.shed-lt-fc-guestnote {
	margin: 0 0 1rem;
	padding: 0.7rem 1rem;
	border: 1px solid var(--shed-lt-border);
	border-left: 4px solid var(--shed-lt-accent);
	border-radius: var(--shed-lt-radius);
	background: var(--shed-lt-surface);
	color: var(--shed-lt-muted);
	font-size: 0.92rem;
}

.shed-lt-fc-guestnote a {
	color: var(--shed-lt-text);
	font-weight: 600;
}