/*
 * 쉘 프로그래밍(/shell) — 이전 사이트 web/src/routes/shell/+page.svelte · components/shell/ShellTerminal.svelte 의 스타일을 옮겼다.
 * resources/views/shell/** 만 읽는다. 선택자는 .shell-course 아래로 좁힌다(app.css 의 .page·.notice 같은 이름과 겹치지 않게).
 * 방향이 있는 속성은 논리 속성만(ar·ur). 이전 사이트의 화면 너비 기준(@media)은 본문 너비 기준(@container)으로 바꿨다 —
 * 넓은 화면에서 옆의 대화 패널이 열려 본문이 좁아져도 배치가 맞는다.
 * 터미널·코드 블록은 오른쪽→왼쪽 언어에서도 왼쪽부터 쓴다(Blade 의 dir="ltr").
 */

/* ── 틀 · 단원 색 ───────────────────────────────── */
html:has(.shell-course) { scroll-padding-block-start: 5rem; }

.shell-course {
	--shell-ink: #07111f;
	--shell-green: #5ee6a8;
	--shell-cyan: #68d8ff;
	--shell-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace;
	--accent: var(--wa-color-brand-fill-loud);
	padding-block-start: 0;
}
.shell-course .hub,
.shell-course .lesson-page {
	container-type: inline-size;
	position: relative;
	isolation: isolate;
	min-inline-size: 0;
}

/* 단원마다 다른 색 — 카드의 data-accent, 실습 화면의 data-accent(단원 번호) */
.shell-course [data-accent='1'] { --accent: #6c8cff; }
.shell-course [data-accent='2'] { --accent: #22c55e; }
.shell-course [data-accent='3'] { --accent: #f59e0b; }
.shell-course [data-accent='4'] { --accent: #ec4899; }
.shell-course [data-accent='5'] { --accent: #14b8a6; }
.shell-course [data-accent='6'] { --accent: #8b5cf6; }
.shell-course [data-accent='7'] { --accent: #ef4444; }
.shell-course [data-accent='8'] { --accent: #0ea5e9; }
.shell-course [data-accent='9'] { --accent: #f5b301; }
.shell-course [data-accent='10'] { --accent: #68a063; }
.shell-course [data-accent='11'] { --accent: #a855f7; }
.shell-course [data-accent='12'] { --accent: #3776ab; }

/* 화살표는 오른쪽→왼쪽 언어에서 뒤집는다 */
[dir='rtl'] .shell-course :is(.fa-arrow-left, .fa-arrow-right) { transform: scaleX(-1); }

/* 글자를 이어 쓰는 문자(아랍·우르두·힌디·벵골·태국)는 자간을 벌리지 않는다 */
:is(:lang(ar), :lang(ur), :lang(hi), :lang(bn), :lang(th)) .shell-course :is(.eyebrow, .section-kicker, .lesson-label, .lesson-number, .overview-heading small, .content-title small, .practice-label, .mission-count, .status, .lesson-nav-button small, .secure-label, .terminal-statusbar) {
	letter-spacing: 0;
}

/* Web Awesome 의 기본 요소 모양(@layer wa-native — 단추 높이·가운데 정렬·줄바꿈 금지, code 배경, 입력칸 테두리)을 이 화면의 모양으로 되돌린다 */
.shell-course :is(.primary-cta, .snippet, .lesson-nav-button, .back-button, .hint-button, .reset-button) { block-size: auto; white-space: normal; }
.shell-course :is(.snippet, .advanced-snippets) code { padding: 0; border-radius: 0; background: none; }
.shell-course .webserver-code pre { background: none; border-radius: 0; }
.shell-course .command-input { block-size: auto; box-shadow: none; }

/* 입력줄은 터미널 테두리 색이 초점을 보여 준다 */
.shell-course :is(.primary-cta, .roadmap-link, .lesson-card, .back-button, .jump-practice, .snippet, .lesson-nav-button, .hint-button, .run-button, .reset-button):focus-visible {
	outline: 3px solid color-mix(in oklab, var(--accent, var(--shell-green)) 45%, white);
	outline-offset: 3px;
}

/* ── 대시보드 ───────────────────────────────────── */
.shell-course .hub {
	display: grid;
	gap: clamp(1.2rem, 2.5cqw, 2rem);
	padding-block-end: 2rem;
}
.shell-course .hub::before {
	content: '';
	position: absolute;
	z-index: -1;
	inset-block-start: -3rem;
	inset-inline: 0;
	block-size: 32rem;
	background:
		radial-gradient(circle at 18% 28%, rgba(103, 92, 245, 0.1), transparent 34%),
		radial-gradient(circle at 82% 22%, rgba(60, 217, 160, 0.09), transparent 31%);
	filter: blur(20px);
	pointer-events: none;
}

/* 먼저 익혀 둘 기본기 */
.shell-course .shell-essentials {
	position: relative;
	padding: clamp(1rem, 2.5cqw, 1.5rem);
	border: 1px solid color-mix(in oklab, #21976a 35%, var(--wa-color-surface-border));
	border-inline-start: 4px solid #21976a;
	border-radius: 1rem;
	color: var(--wa-color-text-normal);
	background: color-mix(in oklab, #5ee6a8 10%, var(--wa-color-surface-raised));
}
.shell-course .shell-essentials h2 {
	display: flex;
	align-items: baseline;
	gap: 0.65rem;
	margin: 0 0 0.75rem;
	font-size: clamp(1.1rem, 2.3cqw, 1.4rem);
	font-weight: 800;
	line-height: 1.4;
	text-wrap: balance;
}
.shell-course .shell-essentials h2 .fa-solid { flex-shrink: 0; color: #21976a; }
.shell-course .shell-essentials p {
	margin: 0.4rem 0 0;
	font-size: 0.95rem;
	line-height: 1.7;
	overflow-wrap: anywhere;
}
.shell-course .shell-essentials .essentials-takeaway { margin-block-start: 0.75rem; }

/* 첫 화면 — 늘 어두운 패널 */
.shell-course .hero-panel {
	position: relative;
	isolation: isolate;
	overflow: hidden;
	display: grid;
	grid-template-columns: minmax(0, 1.08fr) minmax(17rem, 0.92fr);
	align-items: center;
	gap: clamp(1.25rem, 3cqw, 3rem);
	min-block-size: 29rem;
	box-sizing: border-box;
	padding: clamp(1.6rem, 3.5cqw, 3rem);
	border: 1px solid rgba(134, 239, 190, 0.24);
	border-radius: clamp(1.5rem, 3cqw, 2.25rem);
	color: #f4fbff;
	background:
		radial-gradient(circle at 80% 18%, rgba(58, 213, 157, 0.18), transparent 29%),
		radial-gradient(circle at 14% 100%, rgba(80, 122, 255, 0.16), transparent 34%),
		linear-gradient(138deg, #07101c 0%, #0b1725 48%, #08121f 100%);
	box-shadow:
		0 34px 90px -46px rgba(7, 17, 31, 0.88),
		inset 0 1px 0 rgba(255, 255, 255, 0.07);
}
.shell-course .hero-panel::before {
	content: '';
	position: absolute;
	inset: 0;
	z-index: -1;
	opacity: 0.42;
	background-image:
		linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
		linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
	background-size: 34px 34px;
	mask-image: linear-gradient(90deg, black, transparent 72%);
}
.shell-course .hero-panel::after {
	content: '';
	position: absolute;
	inline-size: 24rem;
	block-size: 24rem;
	inset-inline-end: -12rem;
	inset-block-start: -13rem;
	border: 1px solid rgba(104, 216, 255, 0.16);
	border-radius: 50%;
	box-shadow:
		0 0 0 4rem rgba(104, 216, 255, 0.025),
		0 0 0 8rem rgba(104, 216, 255, 0.018);
}
.shell-course .hero-copy { position: relative; z-index: 2; min-inline-size: 0; }
.shell-course :is(.eyebrow, .lesson-label, .section-kicker) {
	display: inline-flex;
	align-items: center;
	gap: 0.55rem;
	font-size: 0.78rem;
	font-weight: 800;
	letter-spacing: 0.16em;
	text-transform: uppercase;
}
.shell-course .eyebrow { color: var(--shell-green); }
.shell-course .live-dot {
	position: relative;
	display: inline-block;
	inline-size: 0.48rem;
	block-size: 0.48rem;
	flex: 0 0 auto;
	border-radius: 50%;
	background: currentColor;
	box-shadow:
		0 0 0 0.28rem color-mix(in srgb, currentColor 14%, transparent),
		0 0 1rem currentColor;
}
.shell-course .hero-panel h1 {
	max-inline-size: 39rem;
	margin: 1rem 0;
	font-size: clamp(2.1rem, 4.9cqw, 3.9rem);
	line-height: 1.12;
	letter-spacing: -0.045em;
	font-weight: 850;
	text-wrap: balance;
	background: linear-gradient(118deg, #fff 15%, #d9eff2 66%, #8ee8c3 112%);
	-webkit-background-clip: text;
	background-clip: text;
	color: transparent;
}
.shell-course .hero-panel h1 > :is(span, small) { display: block; }
.shell-course .hero-panel h1 > small {
	margin-block-start: 0.22em;
	font: inherit;
	font-size: 0.6em;
	line-height: 1.3;
	letter-spacing: -0.03em;
}
:is(:lang(ar), :lang(ur), :lang(hi), :lang(bn), :lang(th)) .shell-course .hero-panel h1 { letter-spacing: 0; line-height: 1.4; }
.shell-course .hero-lead {
	max-inline-size: 38rem;
	margin: 0;
	color: #9eacbd;
	font-size: clamp(1rem, 1.45vw, 1.1rem);
	line-height: 1.78;
}
.shell-course .hero-actions {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 1rem;
	margin-block-start: 1.65rem;
}
.shell-course .primary-cta {
	display: flex;
	align-items: center;
	gap: 0.75rem;
	min-inline-size: 17.5rem;
	padding: 0.7rem 0.85rem;
	border: 1px solid rgba(255, 255, 255, 0.28);
	border-radius: 1rem;
	color: #061410;
	background: linear-gradient(135deg, #7af0ba, #54d99e);
	box-shadow:
		0 16px 34px -18px rgba(94, 230, 168, 0.85),
		inset 0 1px 0 rgba(255, 255, 255, 0.55);
	font: inherit;
	cursor: pointer;
	transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.shell-course .primary-cta:hover {
	transform: translateY(-2px);
	box-shadow:
		0 20px 42px -18px rgba(94, 230, 168, 0.95),
		inset 0 1px 0 rgba(255, 255, 255, 0.55);
}
.shell-course .cta-icon {
	display: grid;
	place-items: center;
	flex: 0 0 auto;
	inline-size: 2.35rem;
	block-size: 2.35rem;
	border-radius: 0.75rem;
	color: #fff;
	background: #0c3729;
}
.shell-course .cta-copy { display: grid; gap: 0.1rem; min-inline-size: 0; text-align: start; }
.shell-course .primary-cta strong { font-size: 1rem; }
.shell-course .primary-cta small { font-size: 0.76rem; opacity: 0.72; }
.shell-course .cta-arrow { margin-inline-start: auto; }
.shell-course .roadmap-link {
	display: inline-flex;
	align-items: center;
	gap: 0.45rem;
	color: #c3cfdb;
	font-size: 0.87rem;
	font-weight: 700;
	text-decoration: none;
	white-space: nowrap;
}
.shell-course .roadmap-link:hover { color: #fff; }
.shell-course .hero-chips {
	display: flex;
	flex-wrap: wrap;
	gap: 0.55rem 1rem;
	margin: 1.45rem 0 0;
	padding: 0;
	list-style: none;
	color: #8a99ab;
	font-size: 0.78rem;
}
.shell-course .hero-chips li { display: inline-flex; align-items: center; gap: 0.4rem; }
.shell-course .hero-chips :is(.fa-solid, .fa-brands) { color: var(--shell-cyan); }

/* 첫 화면 — 장식 터미널 */
.shell-course .hero-console {
	position: relative;
	z-index: 1;
	min-inline-size: 0;
	padding-block: 2.75rem 2.4rem;
	padding-inline-end: 0.75rem;
	transform: perspective(900px) rotateY(-2deg) rotateX(1deg);
}
.shell-course .console-glow {
	position: absolute;
	inset: 12% 5% 10% 6%;
	filter: blur(38px);
	background: rgba(42, 205, 150, 0.16);
}
.shell-course .console-window {
	position: relative;
	overflow: hidden;
	border: 1px solid rgba(152, 224, 199, 0.22);
	border-radius: 1rem;
	background: rgba(5, 11, 19, 0.86);
	box-shadow:
		0 32px 60px -24px rgba(0, 0, 0, 0.9),
		inset 0 1px 0 rgba(255, 255, 255, 0.07);
	backdrop-filter: blur(18px);
}
.shell-course .console-window::after {
	content: '';
	position: absolute;
	inset: 0;
	background: linear-gradient(112deg, rgba(255, 255, 255, 0.055), transparent 22% 76%, rgba(94, 230, 168, 0.035));
	pointer-events: none;
}
.shell-course .console-bar {
	display: grid;
	grid-template-columns: 1fr auto 1fr;
	align-items: center;
	padding: 0.7rem 0.85rem;
	border-block-end: 1px solid rgba(255, 255, 255, 0.06);
	color: #718096;
	font: 500 0.72rem var(--shell-mono);
	background: rgba(255, 255, 255, 0.025);
}
.shell-course .console-bar > .fa-solid { justify-self: end; }
.shell-course .window-dots { display: flex; gap: 0.32rem; }
.shell-course .window-dots i {
	display: block;
	inline-size: 0.52rem;
	block-size: 0.52rem;
	border-radius: 50%;
	background: #ff6258;
}
.shell-course .window-dots i:nth-child(2) { background: #ffbd2e; }
.shell-course .window-dots i:nth-child(3) { background: #28c941; }
.shell-course .console-body {
	min-block-size: 14.5rem;
	box-sizing: border-box;
	padding: 1.35rem 1.4rem;
	font: 0.84rem/1.75 var(--shell-mono);
}
.shell-course .console-body p { margin: 0 0 0.45rem; white-space: nowrap; }
.shell-course .console-muted { color: #64748b; font-family: var(--pes-font); }
.shell-course .console-prompt { color: var(--shell-green); }
.shell-course .typed { color: #e6edf6; }
.shell-course .console-output { color: #8d9bad; padding-inline-start: 0.2rem; }
.shell-course .cursor {
	display: inline-block;
	inline-size: 0.45rem;
	block-size: 1em;
	vertical-align: -0.16em;
	background: var(--shell-green);
	box-shadow: 0 0 0.6rem rgba(94, 230, 168, 0.7);
	animation: shell-cursor-blink 1.1s steps(2, end) infinite;
}
@keyframes shell-cursor-blink {
	50% { opacity: 0; }
}
.shell-course .floating-badge {
	position: absolute;
	z-index: 2;
	display: flex;
	align-items: center;
	gap: 0.6rem;
	padding: 0.58rem 0.72rem;
	border: 1px solid rgba(255, 255, 255, 0.12);
	border-radius: 0.8rem;
	color: #b9c6d4;
	background: rgba(16, 29, 42, 0.92);
	box-shadow: 0 18px 40px -20px #000;
	backdrop-filter: blur(14px);
	font-size: 0.68rem;
}
.shell-course .floating-badge strong { display: block; color: #fff; font-size: 0.78rem; }
.shell-course .floating-badge > .fa-solid { color: #fbd36a; font-size: 1rem; }
.shell-course .badge-top { inset-block-start: 0.4rem; inset-inline-end: -0.25rem; }
.shell-course .badge-bottom { inset-block-end: 0.2rem; inset-inline-start: -1.4rem; }
.shell-course .mini-ring {
	display: grid;
	place-items: center;
	flex: 0 0 auto;
	inline-size: 2.25rem;
	block-size: 2.25rem;
	border: 1px solid rgba(94, 230, 168, 0.2);
	border-radius: 50%;
	color: var(--shell-green);
	font-weight: 800;
	font-size: 0.67rem;
	background:
		radial-gradient(circle, #10202a 57%, transparent 59%),
		conic-gradient(var(--shell-green) calc(var(--progress, 0) * 1%), #2b3b47 0);
}

/* 진도 */
.shell-course .course-overview {
	display: grid;
	grid-template-columns: minmax(16rem, 1.8fr) repeat(3, minmax(7rem, 0.65fr));
	align-items: stretch;
	overflow: hidden;
	border: 1px solid color-mix(in oklab, var(--wa-color-surface-border) 82%, transparent);
	border-radius: 1.35rem;
	background: color-mix(in oklab, var(--wa-color-surface-raised) 87%, transparent);
	box-shadow: 0 20px 52px -42px var(--wa-color-shadow);
	backdrop-filter: blur(18px);
}
.shell-course .overview-main { min-inline-size: 0; padding: 1.15rem 1.25rem; }
.shell-course .overview-heading { display: flex; align-items: center; gap: 0.75rem; }
.shell-course :is(.section-icon, .title-icon) {
	display: grid;
	place-items: center;
	flex: 0 0 auto;
	inline-size: 2.5rem;
	block-size: 2.5rem;
	border-radius: 0.78rem;
	color: var(--wa-color-brand-fill-loud);
	background: color-mix(in oklab, var(--wa-color-brand-fill-quiet) 54%, transparent);
}
.shell-course .overview-heading > div { display: grid; gap: 0.1rem; }
.shell-course :is(.overview-heading, .content-title) small {
	color: var(--wa-color-text-quiet);
	font-size: 0.68rem;
	font-weight: 800;
	letter-spacing: 0.13em;
	text-transform: uppercase;
}
.shell-course .overview-heading strong { font-size: 0.98rem; }
.shell-course .progress-track {
	block-size: 0.4rem;
	margin-block-start: 0.9rem;
	border-radius: 99rem;
	background: var(--wa-color-surface-lowered);
}
.shell-course .progress-fill {
	position: relative;
	inline-size: var(--pct, 0%);
	block-size: 100%;
	min-inline-size: 0.35rem;
	border-radius: inherit;
	background: linear-gradient(90deg, #675cf5, #3cd9a0);
	box-shadow: 0 0 0.8rem rgba(60, 217, 160, 0.5);
	transition: inline-size 0.5s ease;
}
.shell-course .progress-fill span {
	position: absolute;
	inset-inline-end: -0.1rem;
	inset-block-start: 50%;
	inline-size: 0.45rem;
	block-size: 0.45rem;
	transform: translateY(-50%);
	border-radius: 50%;
	background: #fff;
	box-shadow: 0 0 0 0.18rem rgba(60, 217, 160, 0.28);
}
.shell-course .progress-caption {
	display: flex;
	justify-content: space-between;
	gap: 0.5rem;
	margin-block-start: 0.4rem;
	color: var(--wa-color-text-quiet);
	font-size: 0.73rem;
}
.shell-course .progress-caption strong { color: var(--wa-color-brand-fill-loud); }
.shell-course .overview-stat {
	display: grid;
	align-content: center;
	justify-items: center;
	gap: 0.45rem;
	padding: 1rem 0.65rem;
	border-inline-start: 1px solid color-mix(in oklab, var(--wa-color-surface-border) 75%, transparent);
	text-align: center;
}
.shell-course .overview-stat > .fa-solid {
	display: grid;
	place-items: center;
	inline-size: 2.15rem;
	block-size: 2.15rem;
	border-radius: 0.7rem;
	color: var(--wa-color-brand-fill-loud);
	font-size: 1rem;
	background: color-mix(in oklab, var(--wa-color-brand-fill-quiet) 44%, transparent);
}
.shell-course .overview-stat > span { color: var(--wa-color-text-quiet); font-size: 0.74rem; }
.shell-course .overview-stat strong {
	display: block;
	margin-block-end: 0.1rem;
	color: var(--wa-color-text-normal);
	font-size: 1.28rem;
}

/* 12단원 로드맵 */
.shell-course .course-section { scroll-margin-block-start: 4rem; padding-block-start: 0.4rem; }
.shell-course .section-head {
	display: flex;
	align-items: end;
	justify-content: space-between;
	gap: 1rem;
	margin-block-end: 1.25rem;
}
.shell-course .section-kicker { color: var(--wa-color-brand-fill-loud); }
.shell-course :is(.section-head, .why-heading, .webserver-heading) h2 {
	margin: 0.35rem 0 0.3rem;
	font-size: clamp(1.5rem, 2.8cqw, 2.3rem);
	letter-spacing: -0.035em;
	line-height: 1.25;
}
.shell-course .section-head p {
	margin: 0;
	color: var(--wa-color-text-quiet);
	font-size: 0.9rem;
	line-height: 1.65;
}
.shell-course .course-level {
	display: inline-flex;
	align-items: center;
	gap: 0.4rem;
	flex: 0 0 auto;
	padding: 0.5rem 0.75rem;
	border: 1px solid var(--wa-color-surface-border);
	border-radius: 999px;
	color: var(--wa-color-text-quiet);
	background: var(--wa-color-surface-raised);
	font-size: 0.76rem;
	font-weight: 700;
}
.shell-course .course-level .fa-solid { color: #3cd9a0; }
.shell-course .lesson-grid {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 0.85rem;
	margin: 0;
	padding: 0;
	list-style: none;
}
.shell-course .lesson-grid > li { display: flex; min-inline-size: 0; }
.shell-course .lesson-card {
	position: relative;
	overflow: hidden;
	display: flex;
	flex-direction: column;
	flex: 1;
	min-block-size: 13.25rem;
	padding: 1.25rem;
	border: 1px solid color-mix(in oklab, var(--wa-color-surface-border) 88%, transparent);
	border-radius: 1.15rem;
	color: var(--wa-color-text-normal);
	background:
		radial-gradient(circle at 88% 12%, color-mix(in oklab, var(--accent) 9%, transparent), transparent 34%),
		color-mix(in oklab, var(--wa-color-surface-raised) 92%, transparent);
	box-shadow: 0 18px 42px -38px var(--wa-color-shadow);
	text-align: start;
	text-decoration: none;
	transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}
.shell-course .lesson-card:hover {
	transform: translateY(-5px);
	border-color: color-mix(in oklab, var(--accent) 65%, var(--wa-color-surface-border));
	box-shadow: 0 22px 44px -34px color-mix(in srgb, var(--accent) 55%, transparent);
}
.shell-course .lesson-card.done {
	background: linear-gradient(145deg, color-mix(in oklab, var(--accent) 8%, var(--wa-color-surface-raised)), var(--wa-color-surface-raised));
}
.shell-course .lesson-card.recommended {
	border-color: color-mix(in oklab, var(--accent) 64%, var(--wa-color-surface-border));
	box-shadow: 0 18px 42px -38px var(--accent);
}
.shell-course .card-accent {
	position: absolute;
	inset-block-start: 0;
	inset-inline: 1.15rem;
	block-size: 3px;
	opacity: 0.75;
	background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.shell-course .card-watermark {
	position: absolute;
	inset-inline-end: 0.65rem;
	inset-block-end: -0.32rem;
	z-index: 0;
	color: color-mix(in oklab, var(--accent) 9%, transparent);
	font-size: clamp(4rem, 7cqw, 5.4rem);
	font-weight: 950;
	line-height: 1;
	letter-spacing: -0.09em;
	transition: color 0.22s ease;
	pointer-events: none;
}
.shell-course .lesson-card:hover .card-watermark { color: color-mix(in oklab, var(--accent) 14%, transparent); }
.shell-course :is(.card-head, .card-copy, .card-footer) { position: relative; z-index: 1; }
.shell-course .card-head { display: flex; align-items: center; gap: 0.6rem; }
.shell-course .lesson-icon {
	display: grid;
	place-items: center;
	flex: 0 0 auto;
	inline-size: 2.45rem;
	block-size: 2.45rem;
	border-radius: 0.78rem;
	color: var(--accent);
	background: color-mix(in oklab, var(--accent) 12%, var(--wa-color-surface-raised));
	box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--accent) 18%, transparent);
}
.shell-course .lesson-number {
	color: var(--wa-color-text-quiet);
	font-size: 0.65rem;
	font-weight: 800;
	letter-spacing: 0.1em;
	text-transform: uppercase;
}
.shell-course .status {
	margin-inline-start: auto;
	padding: 0.23rem 0.42rem;
	border-radius: 999px;
	font-size: 0.6rem;
	font-weight: 900;
	letter-spacing: 0.08em;
	white-space: nowrap;
}
.shell-course .done-status {
	display: inline-flex;
	align-items: center;
	gap: 0.2rem;
	color: #178452;
	background: rgba(60, 217, 160, 0.14);
}
.shell-course .current-status {
	color: var(--accent);
	background: color-mix(in oklab, var(--accent) 12%, transparent);
	box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--accent) 18%, transparent);
}
.shell-course .card-copy { display: grid; margin-block-start: 1.15rem; }
.shell-course .card-copy strong { font-size: 1.1rem; letter-spacing: -0.02em; }
.shell-course .card-copy > span {
	margin-block-start: 0.42rem;
	color: var(--wa-color-text-quiet);
	font-size: 0.82rem;
	line-height: 1.62;
}
.shell-course .card-footer {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 0.6rem;
	margin-block-start: auto;
	padding-block-start: 0.9rem;
	border-block-start: 1px solid color-mix(in oklab, var(--wa-color-surface-border) 68%, transparent);
	color: var(--wa-color-text-quiet);
	font-size: 0.7rem;
}
.shell-course .card-footer > span { display: inline-flex; align-items: center; gap: 0.32rem; }
.shell-course .card-action { color: var(--accent); font-weight: 800; }
.shell-course .lesson-card .card-footer { margin-block-start: auto; }
.shell-course .lesson-card .card-copy { margin-block-end: 0.9rem; }

/* 왜 쉘인가 · 웹 서버 예제 */
.shell-course :is(.why-section, .webserver-section) {
	margin-block-start: 1rem;
	padding: clamp(1.5rem, 4cqw, 2.75rem);
	border: 1px solid color-mix(in oklab, var(--wa-color-brand-border-quiet) 48%, var(--wa-color-surface-border));
	border-radius: 1.8rem;
	background: linear-gradient(145deg, color-mix(in oklab, var(--wa-color-brand-fill-quiet) 22%, var(--wa-color-surface-raised)), var(--wa-color-surface-raised));
}
.shell-course .why-heading { max-inline-size: 38rem; margin-block-end: 1.35rem; }
.shell-course .why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; }
.shell-course .why-grid article {
	position: relative;
	overflow: hidden;
	padding: 1.15rem;
	border: 1px solid color-mix(in oklab, var(--wa-color-surface-border) 74%, transparent);
	border-radius: 1rem;
	background: color-mix(in oklab, var(--wa-color-surface-raised) 84%, transparent);
}
.shell-course .why-grid article::after {
	content: '';
	position: absolute;
	inline-size: 7rem;
	block-size: 7rem;
	inset-inline-end: -3.5rem;
	inset-block-end: -4rem;
	border-radius: 50%;
	background: color-mix(in oklab, var(--wa-color-brand-fill-loud) 7%, transparent);
}
.shell-course :is(.why-icon, .compat-icon, .tip-icon) {
	display: grid;
	place-items: center;
	flex: 0 0 auto;
	inline-size: 2.4rem;
	block-size: 2.4rem;
	border-radius: 0.75rem;
	color: var(--wa-color-brand-fill-loud);
	background: color-mix(in oklab, var(--wa-color-brand-fill-quiet) 48%, transparent);
}
.shell-course :is(.compat-icon, .tip-icon) { background: var(--wa-color-surface-raised); }
.shell-course .why-grid h3 { margin: 0.8rem 0 0.4rem; font-size: 1.04rem; }
.shell-course :is(.why-grid p, .compat-note p, .webserver-tip p) {
	margin: 0;
	color: var(--wa-color-text-quiet);
	font-size: 0.85rem;
	line-height: 1.7;
}
.shell-course :is(.compat-note, .webserver-tip) {
	display: flex;
	gap: 0.85rem;
	margin-block-start: 0.9rem;
	padding: 1rem 1.15rem;
	border-radius: 1rem;
	color: var(--wa-color-text-normal);
	background: color-mix(in oklab, var(--wa-color-surface-lowered) 68%, transparent);
}
.shell-course .compat-note strong { display: block; margin-block-end: 0.28rem; font-size: 0.9rem; }
.shell-course .webserver-heading { max-inline-size: 42rem; margin-block-end: 1.4rem; }
.shell-course .webserver-lead {
	margin: 0.55rem 0 0;
	color: var(--wa-color-text-quiet);
	font-size: 0.9rem;
	line-height: 1.75;
}
.shell-course .webserver-grid {
	display: grid;
	grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
	gap: 1rem;
	align-items: start;
}
.shell-course .webserver-code {
	margin: 0;
	overflow: hidden;
	border: 1px solid color-mix(in oklab, #ffffff 12%, #0f1420);
	border-radius: 1rem;
	background: #0f1420;
}
.shell-course .webserver-code figcaption {
	display: flex;
	align-items: center;
	gap: 0.6rem;
	padding: 0.6rem 0.9rem;
	border-block-end: 1px solid rgba(255, 255, 255, 0.08);
	color: rgba(255, 255, 255, 0.62);
	font-size: 0.78rem;
}
.shell-course .code-dots { display: inline-flex; gap: 0.32rem; }
.shell-course .code-dots i {
	display: block;
	inline-size: 0.6rem;
	block-size: 0.6rem;
	border-radius: 50%;
	background: rgba(255, 255, 255, 0.22);
}
.shell-course .webserver-code pre { margin: 0; padding: 1rem 1.1rem; overflow-x: auto; }
.shell-course .webserver-code code {
	color: #e6edf3;
	font: 0.8rem/1.65 var(--shell-mono);
	white-space: pre;
}
.shell-course .webserver-parts {
	display: grid;
	gap: 0.7rem;
	margin: 0;
	padding: 0;
	list-style: none;
	counter-reset: part;
}
.shell-course .webserver-parts li {
	position: relative;
	padding-block: 0.85rem;
	padding-inline: 2.65rem 1rem;
	border: 1px solid color-mix(in oklab, var(--wa-color-surface-border) 74%, transparent);
	border-radius: 0.9rem;
	background: color-mix(in oklab, var(--wa-color-surface-raised) 84%, transparent);
}
.shell-course .webserver-parts li::before {
	counter-increment: part;
	content: counter(part);
	position: absolute;
	inset-inline-start: 0.8rem;
	inset-block-start: 0.82rem;
	display: grid;
	place-items: center;
	inline-size: 1.5rem;
	block-size: 1.5rem;
	border-radius: 50%;
	color: var(--wa-color-brand-fill-loud);
	background: color-mix(in oklab, var(--wa-color-brand-fill-quiet) 55%, transparent);
	font-size: 0.75rem;
	font-weight: 700;
}
.shell-course .webserver-parts code {
	display: inline-block;
	margin-block-end: 0.28rem;
	padding: 0.1rem 0.42rem;
	border-radius: 0.4rem;
	color: var(--wa-color-brand-fill-loud);
	background: color-mix(in oklab, var(--wa-color-brand-fill-quiet) 30%, transparent);
	font: 0.78rem var(--shell-mono);
}
.shell-course .webserver-parts li > span {
	display: block;
	color: var(--wa-color-text-quiet);
	font-size: 0.84rem;
	line-height: 1.65;
}

/* ── 실습 화면 ──────────────────────────────────── */
.shell-course .lesson-page { padding-block-end: 2rem; }
.shell-course .lesson-page::before {
	content: '';
	position: absolute;
	z-index: -1;
	inset-block-start: -3rem;
	inset-inline: 0;
	block-size: 28rem;
	background: radial-gradient(circle at 72% 18%, color-mix(in oklab, var(--accent) 10%, transparent), transparent 42%);
	pointer-events: none;
}
.shell-course .lesson-toolbar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 0.75rem;
	min-block-size: 3rem;
	margin-block-end: 0.8rem;
	padding: 0.35rem 0.45rem;
	border: 1px solid color-mix(in oklab, var(--wa-color-surface-border) 72%, transparent);
	border-radius: 0.95rem;
	background: color-mix(in oklab, var(--wa-color-surface-raised) 78%, transparent);
	box-shadow: 0 14px 34px -34px var(--wa-color-shadow);
	backdrop-filter: blur(16px);
}
.shell-course .back-button {
	display: inline-flex;
	align-items: center;
	gap: 0.45rem;
	padding: 0.5rem 0.65rem;
	border: 0;
	border-radius: 0.65rem;
	color: var(--wa-color-text-quiet);
	background: transparent;
	font: inherit;
	font-size: 0.82rem;
	font-weight: 750;
	cursor: pointer;
}
.shell-course .back-button:hover { color: var(--wa-color-text-normal); background: var(--wa-color-surface-raised); }
.shell-course .toolbar-progress {
	display: flex;
	align-items: center;
	gap: 0.3rem;
	color: var(--wa-color-text-quiet);
	font-size: 0.73rem;
}
.shell-course .toolbar-progress > div {
	inline-size: 6rem;
	block-size: 0.28rem;
	margin-inline-end: 0.45rem;
	overflow: hidden;
	border-radius: 99rem;
	background: var(--wa-color-surface-lowered);
}
.shell-course .toolbar-progress > div span {
	display: block;
	inline-size: var(--pct, 0%);
	block-size: 100%;
	border-radius: inherit;
	background: var(--accent);
}
.shell-course .toolbar-progress strong { color: var(--wa-color-text-normal); font-size: 0.9rem; }

.shell-course .lesson-hero {
	position: relative;
	overflow: hidden;
	display: grid;
	grid-template-columns: auto minmax(0, 1fr) auto;
	align-items: center;
	gap: 1.2rem;
	padding: clamp(1.4rem, 3cqw, 2rem);
	border: 1px solid color-mix(in oklab, var(--accent) 24%, var(--wa-color-surface-border));
	border-radius: 1.4rem;
	background: linear-gradient(120deg, color-mix(in oklab, var(--accent) 11%, var(--wa-color-surface-raised)), var(--wa-color-surface-raised) 68%);
	box-shadow: 0 24px 54px -46px color-mix(in srgb, var(--accent) 65%, transparent);
}
.shell-course .lesson-hero::before {
	content: '';
	position: absolute;
	inset: 0;
	opacity: 0.28;
	background-image:
		linear-gradient(color-mix(in oklab, var(--accent) 11%, transparent) 1px, transparent 1px),
		linear-gradient(90deg, color-mix(in oklab, var(--accent) 11%, transparent) 1px, transparent 1px);
	background-size: 30px 30px;
	mask-image: linear-gradient(90deg, transparent 34%, black);
	pointer-events: none;
}
.shell-course .lesson-hero::after {
	content: '';
	position: absolute;
	inline-size: 14rem;
	block-size: 14rem;
	inset-inline-end: -5rem;
	inset-block-start: -8rem;
	border-radius: 50%;
	background: color-mix(in oklab, var(--accent) 12%, transparent);
}
.shell-course .lesson-watermark {
	position: absolute;
	inset-inline-end: 1.2rem;
	inset-block-end: -1.25rem;
	z-index: 0;
	color: color-mix(in oklab, var(--accent) 8%, transparent);
	font-size: clamp(7rem, 15cqw, 11rem);
	font-weight: 950;
	line-height: 1;
	letter-spacing: -0.1em;
	pointer-events: none;
}
.shell-course .lesson-hero-icon {
	position: relative;
	z-index: 1;
	display: grid;
	place-items: center;
	inline-size: clamp(3.5rem, 6cqw, 4.6rem);
	block-size: clamp(3.5rem, 6cqw, 4.6rem);
	border-radius: 1.2rem;
	color: #fff;
	font-size: 1.45rem;
	background: linear-gradient(145deg, color-mix(in oklab, var(--accent) 82%, #fff), var(--accent));
	box-shadow:
		0 18px 30px -18px var(--accent),
		inset 0 1px 0 rgba(255, 255, 255, 0.42);
	transform: rotate(-3deg);
}
.shell-course .lesson-hero-copy { position: relative; z-index: 1; min-inline-size: 0; }
.shell-course .lesson-label { color: var(--accent); }
.shell-course .lesson-hero h1 {
	margin: 0.35rem 0;
	font-size: clamp(1.6rem, 3.2cqw, 2.5rem);
	line-height: 1.2;
	letter-spacing: -0.04em;
}
:is(:lang(ar), :lang(ur), :lang(hi), :lang(bn), :lang(th)) .shell-course .lesson-hero h1 { letter-spacing: 0; line-height: 1.45; }
.shell-course .lesson-hero-copy > p {
	max-inline-size: 44rem;
	margin: 0;
	color: var(--wa-color-text-quiet);
	font-size: 0.9rem;
	line-height: 1.65;
}
.shell-course .lesson-meta {
	display: flex;
	flex-wrap: wrap;
	gap: 0.55rem 1rem;
	margin-block-start: 0.8rem;
	color: var(--wa-color-text-quiet);
	font-size: 0.74rem;
}
.shell-course .lesson-meta span { display: inline-flex; align-items: center; gap: 0.35rem; }
.shell-course .lesson-meta .fa-solid { color: var(--accent); }
.shell-course .jump-practice {
	position: relative;
	z-index: 1;
	display: inline-flex;
	align-items: center;
	gap: 0.45rem;
	padding: 0.65rem 0.85rem;
	border-radius: 0.75rem;
	color: #fff;
	background: var(--accent);
	box-shadow: 0 14px 28px -18px var(--accent);
	font-size: 0.8rem;
	font-weight: 800;
	text-decoration: none;
	white-space: nowrap;
}

.shell-course .lesson-layout {
	display: grid;
	grid-template-columns: minmax(0, 1.04fr) minmax(20rem, 0.96fr);
	gap: 1rem;
	align-items: start;
	margin-block-start: 1rem;
}
.shell-course .concept-column,
.shell-course .concept-stack { display: grid; gap: 0.9rem; min-inline-size: 0; }
.shell-course :is(.content-card, .advanced-card) {
	position: relative;
	overflow: hidden;
	padding: 1.25rem;
	border: 1px solid color-mix(in oklab, var(--wa-color-surface-border) 82%, transparent);
	border-radius: 1.15rem;
	background: color-mix(in oklab, var(--wa-color-surface-raised) 92%, transparent);
	box-shadow: 0 18px 44px -40px var(--wa-color-shadow);
}
.shell-course .goals-card {
	background:
		linear-gradient(135deg, color-mix(in oklab, var(--accent) 5%, transparent), transparent 42%),
		color-mix(in oklab, var(--wa-color-surface-raised) 94%, transparent);
}
.shell-course .concept-card {
	background:
		radial-gradient(circle at 100% 0, color-mix(in oklab, var(--accent) 5%, transparent), transparent 28%),
		color-mix(in oklab, var(--wa-color-surface-raised) 94%, transparent);
}
.shell-course .content-card::before {
	content: '';
	position: absolute;
	inset-block-start: 0;
	inset-inline: 1.25rem;
	block-size: 2px;
	background: linear-gradient(90deg, transparent, color-mix(in oklab, var(--accent) 65%, transparent), transparent);
}
.shell-course .content-title { display: flex; align-items: center; gap: 0.8rem; margin-block-end: 1rem; }
.shell-course .title-icon { color: var(--accent); background: color-mix(in oklab, var(--accent) 10%, transparent); }
.shell-course .content-title > div { min-inline-size: 0; }
.shell-course .content-title h2 { margin: 0.12rem 0 0; font-size: 1.08rem; letter-spacing: -0.02em; }
.shell-course .content-title p { margin: 0.22rem 0 0; color: var(--wa-color-text-quiet); font-size: 0.78rem; }
.shell-course .goal-list { display: grid; gap: 0.48rem; margin: 0; padding: 0; list-style: none; }
.shell-course .goal-list li {
	display: flex;
	align-items: flex-start;
	gap: 0.65rem;
	padding: 0.62rem 0.7rem;
	border-radius: 0.7rem;
	color: var(--wa-color-text-normal);
	background: color-mix(in oklab, var(--accent) 4%, var(--wa-color-surface-lowered));
	font-size: 0.85rem;
	line-height: 1.55;
}
.shell-course .goal-list li > span {
	display: grid;
	place-items: center;
	flex: 0 0 auto;
	inline-size: 1.25rem;
	block-size: 1.25rem;
	margin-block-start: 0.1rem;
	border-radius: 50%;
	color: var(--accent);
	background: color-mix(in oklab, var(--accent) 12%, var(--wa-color-surface-raised));
	font-size: 0.66rem;
	font-weight: 900;
}
.shell-course .concept-list { display: grid; gap: 1rem; }
.shell-course .concept-list article {
	display: grid;
	grid-template-columns: auto 1fr;
	gap: 0.75rem;
	padding-inline-start: 0.1rem;
	border-inline-start: 2px solid color-mix(in oklab, var(--accent) 14%, transparent);
}
.shell-course .concept-number {
	padding-inline-start: 0.7rem;
	color: color-mix(in oklab, var(--accent) 58%, var(--wa-color-text-quiet));
	font: 800 0.73rem/1.5 var(--shell-mono);
}
.shell-course .concept-list h3 { margin: 0 0 0.35rem; font-size: 0.96rem; }
.shell-course .concept-list p {
	margin: 0 0 0.4rem;
	color: var(--wa-color-text-quiet);
	font-size: 0.86rem;
	line-height: 1.75;
	overflow-wrap: anywhere;
}
.shell-course .snippet-list { display: grid; gap: 0.5rem; }
.shell-course .snippet {
	display: grid;
	grid-template-columns: auto minmax(0, 1fr) auto;
	align-items: center;
	gap: 0.65rem;
	inline-size: 100%;
	padding: 0.65rem 0.7rem;
	border: 1px solid #273344;
	border-radius: 0.75rem;
	color: #dbe8f3;
	background: linear-gradient(120deg, #0c1522, #101c2a);
	font: inherit;
	text-align: start;
	cursor: pointer;
	transition: border-color 0.18s ease, transform 0.18s ease;
}
.shell-course .snippet:hover {
	transform: translateY(-1px);
	border-color: color-mix(in srgb, var(--accent) 70%, #273344);
}
.shell-course .snippet-prompt { color: #59dda2; font: 800 0.86rem var(--shell-mono); }
.shell-course .snippet-copy { display: grid; min-inline-size: 0; gap: 0.18rem; }
.shell-course .snippet code {
	overflow: hidden;
	color: #ebf5ff;
	font: 0.81rem var(--shell-mono);
	text-align: start;
	text-overflow: ellipsis;
	white-space: nowrap;
}
.shell-course .snippet small {
	overflow: hidden;
	color: #8193a8;
	font-size: 0.72rem;
	text-overflow: ellipsis;
	white-space: nowrap;
}
.shell-course .snippet-run {
	display: grid;
	place-items: center;
	inline-size: 1.8rem;
	block-size: 1.8rem;
	border-radius: 0.55rem;
	color: #5ee6a8;
	background: rgba(94, 230, 168, 0.08);
}
[dir='rtl'] .shell-course .snippet-run .fa-play { transform: scaleX(-1); }
.shell-course .pitfalls-card {
	border-color: color-mix(in oklab, #f5b83d 26%, var(--wa-color-surface-border));
	background: linear-gradient(145deg, color-mix(in oklab, #f5b83d 7%, var(--wa-color-surface-raised)), var(--wa-color-surface-raised));
}
.shell-course .pitfalls-card .title-icon { color: #d99000; background: rgba(245, 184, 61, 0.12); }
.shell-course .compact-title { margin-block-end: 0.75rem; }
.shell-course .pitfalls-card ul { display: grid; gap: 0.42rem; margin: 0; padding-inline-start: 1.1rem; }
.shell-course .pitfalls-card li {
	color: var(--wa-color-text-quiet);
	font-size: 0.84rem;
	line-height: 1.6;
	overflow-wrap: anywhere;
}
.shell-course .pitfalls-card li::marker { color: #d99000; }

/* 심화 학습(펼침) */
.shell-course .advanced-card { padding: 0; }
.shell-course .advanced-card summary {
	margin-inline: 0;
	padding: 1rem 1.2rem;
	color: var(--accent);
	font-size: 0.9rem;
	font-weight: 800;
	cursor: pointer;
}
.shell-course .advanced-body { padding: 0 1.2rem 1.1rem; font-size: 0.84rem; }
.shell-course .advanced-topic { margin-block-end: 1rem; }
.shell-course .advanced-topic h3 { margin: 0 0 0.25rem; font-size: 0.94rem; }
.shell-course .advanced-topic p { margin: 0 0 0.5rem; color: var(--wa-color-text-quiet); line-height: 1.6; }
.shell-course .advanced-snippets { display: grid; gap: 0.3rem; }
.shell-course .advanced-snippets > div {
	display: grid;
	gap: 0.14rem;
	padding: 0.5rem 0.65rem;
	border-radius: 0.55rem;
	background: #0e1723;
}
.shell-course .advanced-snippets code {
	color: #9bebbd;
	font: 0.76rem var(--shell-mono);
	text-align: start;
	white-space: pre-wrap;
	overflow-wrap: anywhere;
}
.shell-course .advanced-snippets span { color: #7d8ea3; font-size: 0.72rem; }
.shell-course .advanced-source {
	display: flex;
	gap: 0.45rem;
	margin: 0;
	padding-block-start: 0.7rem;
	border-block-start: 1px solid var(--wa-color-surface-border);
	color: var(--wa-color-text-quiet);
	font-size: 0.74rem;
}

/* 실습 칸 — 넓은 화면에서는 따라 내려온다 */
.shell-course .practice-column {
	position: sticky;
	inset-block-start: 3.8rem;
	min-inline-size: 0;
	scroll-margin-block-start: 4rem;
	padding: 0.9rem;
	border: 1px solid color-mix(in oklab, var(--accent) 20%, var(--wa-color-surface-border));
	border-radius: 1.2rem;
	background: linear-gradient(160deg, color-mix(in oklab, var(--accent) 5%, var(--wa-color-surface-raised)), var(--wa-color-surface-raised));
	box-shadow: 0 24px 54px -42px var(--wa-color-shadow);
}
.shell-course .practice-label {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.45rem;
	margin: 0 0.2rem 0.75rem;
	color: var(--accent);
	font-size: 0.73rem;
	font-weight: 900;
	letter-spacing: 0.12em;
	text-transform: uppercase;
}
.shell-course .practice-label small {
	margin-inline-start: auto;
	color: var(--wa-color-text-quiet);
	font-size: 0.7rem;
	font-weight: 600;
	letter-spacing: 0;
	text-transform: none;
}
.shell-course .lesson-navigation {
	display: flex;
	justify-content: space-between;
	gap: 0.75rem;
	margin-block-start: 1rem;
}
.shell-course .lesson-nav-button {
	display: flex;
	align-items: center;
	gap: 0.75rem;
	min-inline-size: min(15rem, 46%);
	padding: 0.75rem 0.85rem;
	border: 1px solid var(--wa-color-surface-border);
	border-radius: 0.85rem;
	color: var(--wa-color-text-normal);
	background: var(--wa-color-surface-raised);
	font: inherit;
	cursor: pointer;
	transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
.shell-course .lesson-nav-button:hover {
	transform: translateY(-2px);
	border-color: color-mix(in oklab, var(--accent) 45%, var(--wa-color-surface-border));
	box-shadow: 0 14px 28px -24px var(--accent);
}
.shell-course .lesson-nav-button.previous { justify-content: flex-start; }
.shell-course .lesson-nav-button > span { display: grid; gap: 0.08rem; text-align: start; }
.shell-course .lesson-nav-button small {
	color: var(--wa-color-text-quiet);
	font-size: 0.66rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
}
.shell-course .lesson-nav-button strong { font-size: 0.84rem; }
.shell-course .lesson-nav-button.next {
	justify-content: flex-end;
	margin-inline-start: auto;
	border-color: transparent;
	color: #fff;
	background: var(--accent);
}
.shell-course .lesson-nav-button.next > span { text-align: end; }
.shell-course .lesson-nav-button.next small { color: rgba(255, 255, 255, 0.75); }

/* ── 가상 터미널 · 미션 ──────────────────────────── */
.shell-course .terminal-lab { display: grid; gap: 0.85rem; min-inline-size: 0; }
.shell-course .mission-card {
	position: relative;
	overflow: hidden;
	padding: 1.05rem 1.1rem;
	border: 1px solid color-mix(in oklab, var(--accent) 24%, var(--wa-color-surface-border));
	border-radius: 0.9rem;
	background: linear-gradient(135deg, color-mix(in oklab, var(--accent) 8%, var(--wa-color-surface-raised)), var(--wa-color-surface-raised));
	box-shadow: 0 16px 38px -34px var(--accent);
}
.shell-course .mission-card::before {
	content: '';
	position: absolute;
	inset-block: 0;
	inset-inline-start: 0;
	inline-size: 3px;
	background: linear-gradient(180deg, var(--accent), color-mix(in oklab, var(--accent) 45%, #5ee6a8));
}
.shell-course .mission-card::after {
	content: '';
	position: absolute;
	inline-size: 6rem;
	block-size: 6rem;
	inset-inline-end: -3rem;
	inset-block-start: -3rem;
	border-radius: 50%;
	background: color-mix(in oklab, var(--accent) 10%, transparent);
}
.shell-course .mission-topline {
	position: relative;
	z-index: 1;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 0.6rem;
}
.shell-course .mission-count {
	display: flex;
	align-items: baseline;
	gap: 0.2rem;
	color: var(--accent);
	font-size: 0.74rem;
	font-weight: 850;
	letter-spacing: 0.1em;
	text-transform: uppercase;
}
.shell-course .mission-count small { color: var(--wa-color-text-quiet); font-size: 0.65rem; }
.shell-course .hint-button {
	display: inline-flex;
	align-items: center;
	gap: 0.35rem;
	padding: 0.42rem 0.58rem;
	border: 0;
	border-radius: 0.55rem;
	color: var(--accent);
	background: color-mix(in oklab, var(--accent) 9%, transparent);
	font: inherit;
	font-size: 0.74rem;
	font-weight: 750;
	cursor: pointer;
}
.shell-course .mission-progress {
	block-size: 0.24rem;
	margin: 0.55rem 0 0.7rem;
	overflow: hidden;
	border-radius: 99rem;
	background: var(--wa-color-surface-lowered);
}
.shell-course .mission-progress span {
	display: block;
	inline-size: var(--pct, 0%);
	block-size: 100%;
	border-radius: inherit;
	background: linear-gradient(90deg, var(--accent), color-mix(in oklab, var(--accent) 55%, #5ee6a8));
	transition: inline-size 0.35s ease;
}
.shell-course .mission-prompt {
	position: relative;
	z-index: 1;
	margin: 0;
	color: var(--wa-color-text-normal);
	font-size: 0.88rem;
	font-weight: 720;
	line-height: 1.55;
	overflow-wrap: anywhere;
}
.shell-course .mission-hint {
	position: relative;
	z-index: 1;
	display: flex;
	gap: 0.45rem;
	margin: 0.65rem 0 0;
	padding: 0.55rem 0.65rem;
	border-radius: 0.6rem;
	color: var(--wa-color-text-quiet);
	background: color-mix(in oklab, #f4c24f 9%, var(--wa-color-surface-lowered));
	font-size: 0.8rem;
	line-height: 1.55;
	overflow-wrap: anywhere;
}
.shell-course .mission-hint .fa-solid { flex: 0 0 auto; margin-block-start: 0.2rem; color: #d99a00; }
.shell-course .mission-card.completed {
	display: flex;
	align-items: center;
	gap: 0.7rem;
	border-color: rgba(60, 198, 133, 0.28);
	background: linear-gradient(135deg, rgba(60, 198, 133, 0.1), var(--wa-color-surface-raised));
}
.shell-course .complete-icon {
	display: grid;
	place-items: center;
	flex: 0 0 auto;
	inline-size: 2.1rem;
	block-size: 2.1rem;
	border-radius: 50%;
	color: white;
	background: #35bd7e;
	box-shadow: 0 8px 20px -10px #35bd7e;
}
.shell-course .mission-card.completed strong { font-size: 0.88rem; }
.shell-course .mission-card.completed p { margin: 0.18rem 0 0; color: var(--wa-color-text-quiet); font-size: 0.76rem; line-height: 1.5; }

/* 터미널 — 늘 어두운 창 */
.shell-course .terminal {
	position: relative;
	overflow: hidden;
	min-inline-size: 0;
	border: 1px solid #263547;
	border-radius: 1.05rem;
	background: #08111c;
	box-shadow:
		0 24px 48px -26px rgba(3, 9, 17, 0.78),
		inset 0 1px 0 rgba(255, 255, 255, 0.04);
	cursor: text;
	transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.shell-course .terminal:focus-within {
	border-color: color-mix(in srgb, var(--accent, #5ee6a8) 52%, #263547);
	box-shadow:
		0 28px 56px -28px rgba(3, 9, 17, 0.88),
		0 0 0 1px color-mix(in srgb, var(--accent, #5ee6a8) 16%, transparent);
}
.shell-course .terminal::after {
	content: '';
	position: absolute;
	z-index: 3;
	inset: 2.8rem 0 1.8rem;
	opacity: 0.14;
	background: repeating-linear-gradient(180deg, transparent 0, transparent 3px, rgba(139, 237, 195, 0.08) 4px);
	pointer-events: none;
}
.shell-course .terminal-bar {
	position: relative;
	z-index: 4;
	display: grid;
	grid-template-columns: 1fr auto 1fr;
	align-items: center;
	min-block-size: 2.8rem;
	padding: 0 0.95rem;
	border-block-end: 1px solid #1e2a39;
	background: linear-gradient(180deg, #182535, #121e2b);
}
.shell-course .terminal-title {
	display: flex;
	align-items: center;
	gap: 0.32rem;
	color: #b6c4d3;
	font: 650 0.72rem var(--shell-mono);
	white-space: nowrap;
}
.shell-course .terminal-title .fa-solid { color: #5ee6a8; }
.shell-course .terminal-title small { color: #66788c; font-size: inherit; }
.shell-course .secure-label {
	justify-self: end;
	display: inline-flex;
	align-items: center;
	gap: 0.28rem;
	color: #6f879c;
	font-size: 0.62rem;
	font-weight: 750;
	letter-spacing: 0.08em;
	text-transform: uppercase;
}
.shell-course .secure-label .fa-solid { color: #4dd69a; }
.shell-course .terminal-body {
	position: relative;
	z-index: 1;
	box-sizing: border-box;
	block-size: clamp(21rem, 44vh, 27rem);
	overflow-y: auto;
	padding: 1rem;
	color: #dce7f2;
	background:
		radial-gradient(circle at 90% 0, rgba(45, 106, 89, 0.11), transparent 30%),
		radial-gradient(circle at 12% 100%, rgba(70, 104, 190, 0.07), transparent 28%),
		#08111c;
	font: 0.81rem/1.65 var(--shell-mono);
}
/* 줄 사이의 템플릿 공백이 보이지 않게 — 줄바꿈 보존은 출력 줄에만 */
.shell-course .terminal-body .line { white-space: pre-wrap; overflow-wrap: anywhere; text-align: start; }
.shell-course .terminal-body .line + .line { margin-block-start: 0.1rem; }
.shell-course .terminal-body .line.input { color: #cdd8e4; }
.shell-course .terminal-body .line.output { color: #9ee6bb; }
.shell-course .terminal-body .line.error { color: #ff8f98; }
.shell-course .terminal-body .line.system { color: #76b9f4; }
/* 고정폭 글꼴이 앞에 오면 크롬이 아랍 글자를 이어 쓰지 않는다 — 안내 줄은 본문 글꼴로 */
:is(:lang(ar), :lang(ur)) .shell-course .terminal-body .line:is(.system, .error) { font-family: var(--pes-font), var(--shell-mono); }
.shell-course .input-row { display: flex; align-items: center; gap: 0.42rem; margin-block-start: 0.08rem; }
.shell-course .prompt {
	flex: 0 0 auto;
	color: #58dda0;
	font-weight: 700;
	text-shadow: 0 0 0.7rem rgba(88, 221, 160, 0.3);
}
.shell-course .command-input {
	flex: 1 1 auto;
	min-inline-size: 0;
	padding: 0.12rem 0;
	border: 0;
	outline: 0;
	color: #ecf6ff;
	background: transparent;
	font: inherit;
	caret-color: #58dda0;
}
.shell-course .command-input::placeholder { color: #5a6d82; }
.shell-course .command-input:disabled { opacity: 0.6; }
.shell-course .run-button {
	display: grid;
	place-items: center;
	flex: 0 0 auto;
	inline-size: 1.9rem;
	block-size: 1.9rem;
	border: 1px solid rgba(94, 230, 168, 0.18);
	border-radius: 0.5rem;
	color: #5ee6a8;
	background: rgba(94, 230, 168, 0.07);
	cursor: pointer;
	opacity: 0.75;
	transition: opacity 0.18s ease, background 0.18s ease, transform 0.18s ease;
}
.shell-course .run-button:hover { opacity: 1; background: rgba(94, 230, 168, 0.12); transform: translateY(-1px); }
.shell-course .run-button:disabled { opacity: 0.35; cursor: wait; }
.shell-course .terminal-statusbar {
	position: relative;
	z-index: 4;
	display: flex;
	align-items: center;
	gap: 0.65rem;
	min-block-size: 1.8rem;
	padding: 0 0.8rem;
	border-block-start: 1px solid #172333;
	color: #5f7489;
	background: #0d1723;
	font: 700 0.6rem var(--shell-mono);
	letter-spacing: 0.06em;
}
.shell-course .terminal-statusbar span:first-child { margin-inline-end: auto; color: #6c8196; font-family: var(--pes-font); text-transform: uppercase; }
.shell-course .terminal-statusbar i {
	display: inline-block;
	inline-size: 0.35rem;
	block-size: 0.35rem;
	margin-inline-end: 0.25rem;
	border-radius: 50%;
	background: #4dd69a;
	box-shadow: 0 0 0.5rem rgba(77, 214, 154, 0.7);
}
.shell-course .terminal-actions {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 0.6rem;
	min-block-size: 1.8rem;
}
.shell-course .reset-button {
	display: inline-flex;
	align-items: center;
	gap: 0.38rem;
	padding: 0.45rem 0.6rem;
	border: 0;
	border-radius: 0.5rem;
	color: var(--wa-color-text-quiet);
	background: transparent;
	font: inherit;
	font-size: 0.74rem;
	font-weight: 700;
	cursor: pointer;
}
.shell-course .reset-button:hover { color: var(--wa-color-text-normal); background: var(--wa-color-surface-lowered); }
.shell-course .keyboard-tip {
	display: flex;
	align-items: center;
	gap: 0.22rem;
	color: var(--wa-color-text-quiet);
	font-size: 0.66rem;
}
.shell-course .keyboard-tip kbd {
	display: inline-grid;
	place-items: center;
	min-inline-size: 1rem;
	block-size: 1rem;
	padding: 0 0.18rem;
	box-sizing: border-box;
	border: 1px solid var(--wa-color-surface-border);
	border-radius: 0.25rem;
	color: var(--wa-color-text-quiet);
	background: var(--wa-color-surface-raised);
	box-shadow: 0 1px 0 var(--wa-color-surface-border);
	font: inherit;
}
.shell-course .keyboard-tip i {
	inline-size: 1px;
	block-size: 0.8rem;
	margin: 0 0.22rem;
	background: var(--wa-color-surface-border);
}

/* 단원 통과 축하 — 화면 아래 가운데 */
.shell-course .shell-celebrate {
	position: fixed;
	z-index: 80;
	inset-inline: 0;
	inset-block-end: 1.5rem;
	display: flex;
	align-items: center;
	gap: 0.75rem;
	inline-size: max-content;
	max-inline-size: calc(100% - 2rem);
	margin-inline: auto;
	padding: 0.8rem 1rem;
	border: 1px solid rgba(255, 255, 255, 0.35);
	border-radius: 1rem;
	color: #fff;
	background: linear-gradient(135deg, #5b55e7, #25ba84);
	box-shadow: 0 22px 50px -20px rgba(27, 80, 65, 0.7);
	animation: shell-celebrate-in 0.42s cubic-bezier(0.2, 0.9, 0.2, 1.25);
}
.shell-course .shell-celebrate > span { font-size: 1.5rem; }
.shell-course .shell-celebrate > div { display: grid; }
.shell-course .shell-celebrate strong { font-size: 0.92rem; }
.shell-course .shell-celebrate small { color: rgba(255, 255, 255, 0.8); font-size: 0.76rem; }
@keyframes shell-celebrate-in {
	from { opacity: 0; transform: translateY(1.5rem) scale(0.92); }
}

/* ── 용어 팝업 — 본문 밑줄 · 예제 곁 물음표 · 화면 부분의 사용법(<x-glossary.text>·<x-glossary.info>, 모양은 glossary.css) ── */
/* 예제 단추와 곁의 물음표를 한 줄에 — [예제 단추][?] */
.shell-course .snippet-list {
	grid-template-columns: minmax(0, 1fr) auto;
	align-items: center;
	column-gap: 0.3rem;
}
/* 목표 문장 — 번호 곁의 한 덩어리(용어 단추가 따로 떨어진 칸이 되지 않게 <p> 로 묶었다) */
.shell-course .goal-list li > p { min-inline-size: 0; margin: 0; }
.shell-course .hero-chips li > span { min-inline-size: 0; }
/* 대문자·자간을 쓰는 작은 제목 곁의 물음표 — 글자 줄에 맞춘다 */
.shell-course :is(.overview-heading small, .content-title small, .practice-label, .lesson-label, .advanced-source) .glossary-info {
	inline-size: 1.35rem;
	block-size: 1.35rem;
	letter-spacing: 0;
	vertical-align: -0.3em;
}
.shell-course .mission-count .glossary-info { align-self: center; margin-inline-start: 0.2rem; }
.shell-course .advanced-topic h3 { display: flex; align-items: center; gap: 0.2rem; }
/* 심화 예제 주석 — 어두운 칸 속 용어의 밑줄·강조색을 바탕에 맞춘다 */
.shell-course .advanced-snippets .glossary-term { text-decoration-color: color-mix(in oklab, #8fb4ff 75%, transparent); }
.shell-course .advanced-snippets .glossary-term:is(:hover, :focus-visible, [aria-expanded='true']) { color: #d2e2ff; }
/* 미션 문장 — 단원·미션마다 그려 둔 것 중 지금 것만 보인다(카드 장식보다 위) */
.shell-course .mission-text { position: relative; z-index: 1; }

/* ── 본문 너비에 맞춘 배치 ───────────────────────── */
@container (max-width: 1040px) {
	.shell-course .hero-panel { grid-template-columns: minmax(0, 1fr) minmax(15rem, 0.8fr); padding: 2.25rem; }
	.shell-course .hero-console { transform: none; }
	.shell-course .course-overview { grid-template-columns: minmax(15rem, 1.6fr) repeat(3, minmax(6rem, 0.55fr)); }
	.shell-course .lesson-layout { grid-template-columns: minmax(0, 1fr); }
	.shell-course .practice-column { position: static; }
}
@container (max-width: 780px) {
	.shell-course .hero-panel { grid-template-columns: minmax(0, 1fr); min-block-size: auto; padding: 2rem 1.35rem 1.5rem; }
	.shell-course .hero-console { inline-size: min(100%, 31rem); margin: -1rem auto 0; padding-block: 2.3rem 1.8rem; padding-inline: 0; }
	.shell-course .badge-top { inset-inline-end: -0.2rem; }
	.shell-course .badge-bottom { inset-inline-start: -0.2rem; }
	.shell-course .course-overview { grid-template-columns: repeat(3, minmax(0, 1fr)); }
	.shell-course .overview-main { grid-column: 1 / -1; border-block-end: 1px solid var(--wa-color-surface-border); }
	.shell-course .overview-stat { border-inline-start: 0; }
	.shell-course .overview-stat + .overview-stat { border-inline-start: 1px solid var(--wa-color-surface-border); }
	.shell-course .lesson-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.shell-course .webserver-grid { grid-template-columns: minmax(0, 1fr); }
	.shell-course .lesson-hero { grid-template-columns: auto minmax(0, 1fr); }
	.shell-course .jump-practice { grid-column: 1 / -1; justify-content: center; }
}
@container (max-width: 520px) {
	.shell-course .hero-actions { align-items: stretch; flex-direction: column; }
	.shell-course .primary-cta { min-inline-size: 0; inline-size: 100%; box-sizing: border-box; }
	.shell-course .roadmap-link { justify-content: center; }
	.shell-course .console-body { overflow: hidden; padding-inline: 1rem; font-size: 0.78rem; }
	.shell-course .floating-badge { display: none; }
	.shell-course :is(.lesson-grid, .why-grid) { grid-template-columns: minmax(0, 1fr); }
	.shell-course .section-head { align-items: flex-start; flex-direction: column; }
	.shell-course .lesson-card { min-block-size: 12rem; }
	.shell-course .course-level { display: none; }
	.shell-course .overview-stat { padding-inline: 0.3rem; }
	.shell-course .overview-stat > span { font-size: 0.68rem; }
	.shell-course .compat-note { align-items: flex-start; }
	.shell-course .toolbar-progress > div { display: none; }
	.shell-course .lesson-hero { grid-template-columns: minmax(0, 1fr); }
	.shell-course .lesson-hero-icon { inline-size: 3.4rem; block-size: 3.4rem; }
	.shell-course .lesson-meta { display: grid; gap: 0.35rem; }
	.shell-course .lesson-nav-button { min-inline-size: 0; flex: 1; }
	.shell-course .lesson-nav-button strong { display: none; }
	.shell-course .practice-column { padding: 0.65rem; }
	.shell-course .terminal-body { block-size: 20rem; padding: 0.75rem; font-size: 0.76rem; }
	.shell-course :is(.secure-label, .keyboard-tip) { display: none; }
}

@media (prefers-reduced-motion: reduce) {
	.shell-course :is(.cursor, .shell-celebrate) { animation: none; }
	.shell-course :is(.lesson-card, .primary-cta, .snippet, .progress-fill, .mission-progress span) { transition: none; }
}