.snk-app,
.snk-app * {
	box-sizing: border-box;
}

.snk-app {
	--snk-navy: #172554;
	--snk-blue: #2563eb;
	--snk-purple: #7c3aed;
	--snk-orange: #ea580c;
	--snk-green: #059669;
	--snk-ink: #172033;
	--snk-muted: #596579;
	--snk-line: #dce5f1;
	--snk-soft: #f6f8fc;
	width: 100%;
	max-width: 1180px;
	margin: 20px auto;
	padding: 0;
	color: var(--snk-ink);
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
	font-size: 16px;
	line-height: 1.55;
	container-type: inline-size;
}

.snk-app button,
.snk-app input {
	font: inherit;
}

.snk-app button {
	-webkit-appearance: none;
	appearance: none;
	text-transform: none;
	letter-spacing: normal;
}

.snk-shell {
	width: 100%;
	min-width: 0;
	overflow: hidden;
	background: #fff;
	border: 1px solid var(--snk-line);
	border-radius: 24px;
	box-shadow: 0 18px 50px rgba(23, 37, 84, .10);
}

.snk-hero {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 24px;
	min-height: 210px;
	padding: clamp(26px, 5vw, 54px);
	color: #fff;
	background:
		radial-gradient(circle at 90% 15%, rgba(255,255,255,.20), transparent 23%),
		linear-gradient(125deg, #172554 0%, #1d4ed8 62%, #0ea5e9 100%);
}

.snk-hero__text {
	min-width: 0;
}

.snk-eyebrow {
	display: inline-flex;
	padding: 6px 12px;
	border: 1px solid rgba(255,255,255,.42);
	border-radius: 999px;
	background: rgba(255,255,255,.12);
	color: #fff;
	font-size: 12px;
	font-weight: 800;
	letter-spacing: .08em;
}

.snk-hero h2,
.snk-app .snk-hero h2 {
	margin: 14px 0 6px !important;
	color: #fff !important;
	font-size: clamp(25px, 4.5vw, 43px) !important;
	font-weight: 850 !important;
	line-height: 1.14 !important;
	text-wrap: balance;
}

.snk-hero p {
	margin: 0 !important;
	color: rgba(255,255,255,.86) !important;
	font-size: clamp(15px, 2vw, 18px);
}

.snk-hero__visual {
	position: relative;
	display: grid;
	grid-template-columns: repeat(3, 48px);
	grid-template-rows: repeat(3, 48px);
	place-items: center;
	flex: 0 0 175px;
	height: 160px;
}

.snk-hero__visual span,
.snk-hero__visual strong {
	display: grid;
	place-items: center;
	width: 44px;
	height: 44px;
	border: 1px solid rgba(255,255,255,.5);
	border-radius: 14px;
	background: rgba(255,255,255,.14);
	color: #fff;
	font-size: 18px;
	box-shadow: 0 8px 20px rgba(2, 6, 23, .18);
}

.snk-hero__visual strong {
	grid-column: 2;
	grid-row: 2;
	width: 60px;
	height: 60px;
	border: 3px solid #fde047;
	border-radius: 50%;
	background: #fff;
	color: var(--snk-navy);
	font-size: 23px;
}

.snk-hero__visual span:nth-child(1) { grid-column: 2; grid-row: 1; }
.snk-hero__visual span:nth-child(2) { grid-column: 1; grid-row: 2; }
.snk-hero__visual span:nth-child(4) { grid-column: 3; grid-row: 2; }
.snk-hero__visual span:nth-child(5) { grid-column: 2; grid-row: 3; }

.snk-tabs {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 8px;
	padding: 12px clamp(12px, 3vw, 28px);
	background: #fff;
	border-bottom: 1px solid var(--snk-line);
}

.snk-app .snk-tab,
.snk-app .snk-tool-tab,
.snk-app .snk-lesson-toggle,
.snk-app .snk-option,
.snk-app .snk-btn {
	cursor: pointer;
	opacity: 1 !important;
	visibility: visible !important;
}

.snk-app .snk-tab {
	display: flex !important;
	align-items: center;
	justify-content: center;
	gap: 8px;
	min-height: 48px;
	margin: 0 !important;
	padding: 10px 14px !important;
	border: 1px solid transparent !important;
	border-radius: 12px !important;
	background: #eef3fb !important;
	color: #334155 !important;
	font-weight: 750 !important;
	box-shadow: none !important;
}

.snk-app .snk-tab:hover,
.snk-app .snk-tab:focus-visible {
	border-color: #b8cae5 !important;
	background: #e3ecf9 !important;
	color: var(--snk-navy) !important;
}

.snk-app .snk-tab.is-active {
	background: var(--snk-navy) !important;
	color: #fff !important;
}

.snk-main {
	padding: clamp(20px, 4vw, 44px);
	background: var(--snk-soft);
}

.snk-panel[hidden],
.snk-tool[hidden],
.snk-feedback[hidden],
.snk-quiz[hidden],
.snk-quiz-start[hidden],
.snk-quiz-result[hidden],
.snk-next[hidden] {
	display: none !important;
}

.snk-section-heading {
	display: flex;
	align-items: flex-end;
	justify-content: space-between;
	gap: 20px;
	margin-bottom: 22px;
}

.snk-section-heading > div {
	display: flex;
	align-items: center;
	gap: 12px;
}

.snk-step {
	display: grid;
	place-items: center;
	flex: 0 0 38px;
	width: 38px;
	height: 38px;
	border-radius: 12px;
	background: var(--snk-navy);
	color: #fff;
	font-weight: 850;
}

.snk-section-heading h3,
.snk-app .snk-section-heading h3 {
	margin: 0 !important;
	color: var(--snk-ink) !important;
	font-size: clamp(20px, 3vw, 28px) !important;
	line-height: 1.2 !important;
}

.snk-section-heading > p {
	margin: 0 !important;
	color: var(--snk-muted) !important;
	font-size: 14px;
	text-align: right;
}

.snk-lesson-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 16px;
	align-items: start;
}

.snk-lesson-card {
	--card-color: var(--snk-blue);
	min-width: 0;
	overflow: hidden;
	border: 1px solid var(--snk-line);
	border-top: 4px solid var(--card-color);
	border-radius: 17px;
	background: #fff;
	box-shadow: 0 8px 20px rgba(23, 37, 84, .06);
}

.snk-card--purple { --card-color: var(--snk-purple); }
.snk-card--orange { --card-color: var(--snk-orange); }
.snk-card--green { --card-color: var(--snk-green); }

.snk-app .snk-lesson-toggle {
	display: grid !important;
	grid-template-columns: 44px 1fr 24px;
	align-items: center;
	gap: 12px;
	width: 100% !important;
	min-height: 82px;
	margin: 0 !important;
	padding: 15px 17px !important;
	border: 0 !important;
	border-radius: 0 !important;
	background: #fff !important;
	color: var(--snk-ink) !important;
	text-align: left !important;
	box-shadow: none !important;
}

.snk-app .snk-lesson-toggle:hover,
.snk-app .snk-lesson-toggle:focus-visible {
	background: color-mix(in srgb, var(--card-color) 7%, white) !important;
}

.snk-card-icon {
	display: grid;
	place-items: center;
	width: 44px;
	height: 44px;
	border-radius: 13px;
	background: color-mix(in srgb, var(--card-color) 12%, white);
	color: var(--card-color);
	font-size: 22px;
	font-weight: 850;
}

.snk-lesson-toggle small,
.snk-lesson-toggle strong {
	display: block;
}

.snk-lesson-toggle small {
	margin-bottom: 2px;
	color: var(--card-color);
	font-size: 11px;
	font-weight: 850;
	letter-spacing: .06em;
}

.snk-lesson-toggle strong {
	color: var(--snk-ink) !important;
	font-size: 16px;
	line-height: 1.3;
}

.snk-chevron {
	color: var(--card-color);
	font-size: 24px;
	font-weight: 850;
	transition: transform .22s ease;
}

.snk-lesson-card.is-open .snk-chevron {
	transform: rotate(180deg);
}

.snk-lesson-body {
	display: none;
	padding: 0 18px 20px;
	color: #3d495c;
	font-size: 14px;
}

.snk-lesson-card.is-open .snk-lesson-body {
	display: block;
}

.snk-lesson-body > p:first-child {
	margin-top: 0;
}

.snk-example,
.snk-interpret {
	margin-top: 14px;
	padding: 13px 15px;
	border-left: 4px solid var(--card-color);
	border-radius: 10px;
	background: color-mix(in srgb, var(--card-color) 7%, white);
}

.snk-example > span {
	display: block;
	margin-bottom: 4px;
	color: var(--card-color);
	font-size: 10px;
	font-weight: 900;
	letter-spacing: .09em;
}

.snk-example p {
	margin: 0 !important;
}

.snk-tip {
	margin-bottom: 0;
	padding: 10px 12px;
	border-radius: 9px;
	background: #fffbeb;
	color: #854d0e;
}

.snk-rule-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 8px;
}

.snk-rule-grid div {
	display: grid;
	grid-template-columns: 32px 1fr;
	align-items: center;
	gap: 8px;
	padding: 8px;
	border: 1px solid #e7e0fa;
	border-radius: 9px;
}

.snk-rule-grid b {
	display: grid;
	place-items: center;
	width: 30px;
	height: 30px;
	border-radius: 8px;
	background: var(--snk-purple);
	color: #fff;
}

.snk-rule-grid span {
	font-size: 12px;
	line-height: 1.25;
}

.snk-prime-strip {
	padding: 12px;
	border-radius: 10px;
	background: #fff7ed;
	color: #9a3412;
	font-weight: 700;
	word-spacing: 3px;
}

.snk-tool-tabs {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 8px;
	margin-bottom: 16px;
	padding: 8px;
	border: 1px solid var(--snk-line);
	border-radius: 15px;
	background: #fff;
}

.snk-app .snk-tool-tab {
	min-height: 44px;
	margin: 0 !important;
	padding: 9px 12px !important;
	border: 1px solid transparent !important;
	border-radius: 10px !important;
	background: #eef3fb !important;
	color: #334155 !important;
	font-size: 14px !important;
	font-weight: 750 !important;
	box-shadow: none !important;
}

.snk-app .snk-tool-tab:hover,
.snk-app .snk-tool-tab:focus-visible {
	border-color: #b8cae5 !important;
	background: #e3ecf9 !important;
	color: var(--snk-navy) !important;
}

.snk-app .snk-tool-tab.is-active {
	background: var(--snk-blue) !important;
	color: #fff !important;
}

.snk-tool {
	padding: clamp(16px, 3vw, 28px);
	border: 1px solid var(--snk-line);
	border-radius: 18px;
	background: #fff;
}

.snk-input-card {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr)) auto;
	align-items: end;
	gap: 14px;
	padding: 18px;
	border-radius: 14px;
	background: #f0f5ff;
}

.snk-input-card--compact {
	grid-template-columns: minmax(180px, 1fr) auto;
}

.snk-input-card label {
	min-width: 0;
	color: var(--snk-ink);
	font-size: 14px;
	font-weight: 750;
}

.snk-input-card label span {
	color: var(--snk-muted);
	font-size: 11px;
	font-weight: 500;
}

.snk-input-card input,
.snk-app .snk-input-card input {
	display: block !important;
	width: 100% !important;
	height: 46px !important;
	margin: 6px 0 0 !important;
	padding: 8px 12px !important;
	border: 2px solid #b8c8e1 !important;
	border-radius: 10px !important;
	background: #fff !important;
	color: #0f172a !important;
	font-size: 17px !important;
	font-weight: 750 !important;
	box-shadow: none !important;
}

.snk-input-card input:focus {
	border-color: var(--snk-blue) !important;
	outline: 3px solid rgba(37, 99, 235, .15) !important;
}

.snk-app .snk-btn {
	display: inline-flex !important;
	align-items: center;
	justify-content: center;
	min-height: 46px;
	margin: 0 !important;
	padding: 10px 20px !important;
	border: 2px solid transparent !important;
	border-radius: 11px !important;
	color: #fff !important;
	font-size: 15px !important;
	font-weight: 800 !important;
	line-height: 1.2 !important;
	text-decoration: none !important;
	box-shadow: 0 6px 14px rgba(23, 37, 84, .14) !important;
	transition: transform .16s ease, filter .16s ease;
}

.snk-app .snk-btn:hover,
.snk-app .snk-btn:focus-visible {
	color: #fff !important;
	filter: brightness(.92);
	transform: translateY(-1px);
}

.snk-app .snk-btn--primary { background: var(--snk-blue) !important; }
.snk-app .snk-btn--success { background: var(--snk-green) !important; }

.snk-result {
	min-height: 100px;
	margin-top: 18px;
	padding: 18px;
	border: 1px dashed #b7c4d6;
	border-radius: 14px;
	background: #fbfdff;
}

.snk-result-placeholder {
	margin: 20px 0 !important;
	color: var(--snk-muted) !important;
	text-align: center;
}

.snk-result-title {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	margin-bottom: 14px;
	padding-bottom: 12px;
	border-bottom: 1px solid var(--snk-line);
}

.snk-result-title h4,
.snk-app .snk-result-title h4 {
	margin: 0 !important;
	color: var(--snk-navy) !important;
	font-size: 20px !important;
}

.snk-badge {
	display: inline-flex;
	align-items: center;
	padding: 5px 9px;
	border-radius: 999px;
	background: #dcfce7;
	color: #166534;
	font-size: 12px;
	font-weight: 800;
}

.snk-badge--warn {
	background: #ffedd5;
	color: #9a3412;
}

.snk-result-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 12px;
}

.snk-result-box {
	min-width: 0;
	padding: 14px;
	border: 1px solid #e2e8f0;
	border-radius: 12px;
	background: #fff;
}

.snk-result-box h5,
.snk-app .snk-result-box h5 {
	margin: 0 0 7px !important;
	color: #334155 !important;
	font-size: 13px !important;
	font-weight: 800 !important;
	text-transform: uppercase;
	letter-spacing: .04em;
}

.snk-result-box p {
	margin: 0 !important;
	color: var(--snk-ink) !important;
	overflow-wrap: anywhere;
}

.snk-number-chips {
	display: flex;
	flex-wrap: wrap;
	gap: 7px;
	margin-top: 8px;
}

.snk-number-chips span {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 34px;
	min-height: 34px;
	padding: 4px 8px;
	border-radius: 9px;
	background: #eaf1ff;
	color: #1e40af;
	font-weight: 800;
}

.snk-div-grid {
	display: grid;
	grid-template-columns: repeat(4, minmax(0, 1fr));
	gap: 9px;
}

.snk-div-item {
	padding: 12px 9px;
	border: 2px solid #e2e8f0;
	border-radius: 12px;
	background: #fff;
	text-align: center;
}

.snk-div-item.is-yes { border-color: #6ee7b7; background: #ecfdf5; }
.snk-div-item.is-no { border-color: #fecaca; background: #fff7f7; }

.snk-div-item b {
	display: block;
	font-size: 23px;
}

.snk-div-item strong {
	display: block;
	color: var(--snk-ink);
	font-size: 12px;
}

.snk-div-item small {
	display: block;
	margin-top: 4px;
	color: var(--snk-muted);
	font-size: 10px;
	line-height: 1.25;
}

.snk-explanation {
	margin-top: 14px;
	padding: 13px 15px;
	border-radius: 11px;
	background: #fefce8;
	color: #713f12;
}

.snk-quiz-start,
.snk-quiz-result {
	padding: clamp(24px, 5vw, 46px);
	border: 1px solid var(--snk-line);
	border-radius: 18px;
	background: #fff;
	text-align: center;
}

.snk-quiz-features {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 12px;
	max-width: 560px;
	margin: 0 auto 20px;
}

.snk-quiz-features div {
	padding: 16px 10px;
	border-radius: 13px;
	background: #eef4ff;
}

.snk-quiz-features span,
.snk-quiz-features small {
	display: block;
}

.snk-quiz-features span {
	color: var(--snk-blue);
	font-size: 26px;
	font-weight: 900;
}

.snk-quiz-features small {
	color: var(--snk-muted);
	font-size: 12px;
}

.snk-quiz-start > p {
	max-width: 620px;
	margin: 0 auto 22px !important;
	color: var(--snk-muted) !important;
}

.snk-quiz-top {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 15px;
	margin-bottom: 10px;
}

.snk-quiz-top b,
.snk-quiz-top span {
	display: block;
}

.snk-quiz-top span {
	color: var(--snk-muted);
	font-size: 12px;
}

.snk-score-chip {
	padding: 8px 13px;
	border-radius: 999px;
	background: #dcfce7;
	color: #166534;
	font-size: 13px;
	font-weight: 700;
}

.snk-score-chip b {
	display: inline;
}

.snk-progress {
	height: 8px;
	overflow: hidden;
	margin-bottom: 16px;
	border-radius: 999px;
	background: #dfe7f2;
}

.snk-progress span {
	display: block;
	width: 10%;
	height: 100%;
	border-radius: inherit;
	background: linear-gradient(90deg, var(--snk-blue), #06b6d4);
	transition: width .3s ease;
}

.snk-question-card {
	padding: clamp(20px, 4vw, 34px);
	border: 1px solid var(--snk-line);
	border-radius: 18px;
	background: #fff;
}

.snk-question {
	margin: 0 0 20px !important;
	color: var(--snk-ink) !important;
	font-size: clamp(18px, 3vw, 24px);
	font-weight: 800;
	line-height: 1.4;
}

.snk-options {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 10px;
}

.snk-app .snk-option {
	width: 100% !important;
	min-height: 52px;
	margin: 0 !important;
	padding: 11px 14px !important;
	border: 2px solid #ccd8e8 !important;
	border-radius: 12px !important;
	background: #fff !important;
	color: #263449 !important;
	font-size: 15px !important;
	font-weight: 750 !important;
	text-align: left !important;
	box-shadow: none !important;
}

.snk-app .snk-option:hover:not(:disabled),
.snk-app .snk-option:focus-visible:not(:disabled) {
	border-color: var(--snk-blue) !important;
	background: #eff6ff !important;
	color: #1e3a8a !important;
}

.snk-app .snk-option.is-correct {
	border-color: #10b981 !important;
	background: #ecfdf5 !important;
	color: #065f46 !important;
}

.snk-app .snk-option.is-wrong {
	border-color: #ef4444 !important;
	background: #fff1f2 !important;
	color: #991b1b !important;
}

.snk-app .snk-option:disabled {
	cursor: default;
	opacity: 1 !important;
}

.snk-feedback {
	margin-top: 16px;
	padding: 13px 15px;
	border-radius: 11px;
	background: #eff6ff;
	color: #1e3a8a;
}

.snk-feedback.is-correct { background: #ecfdf5; color: #065f46; }
.snk-feedback.is-wrong { background: #fff1f2; color: #991b1b; }

.snk-next {
	margin-top: 16px !important;
}

.snk-result-mark {
	display: grid;
	place-items: center;
	width: 88px;
	height: 88px;
	margin: 0 auto 18px;
	border-radius: 50%;
	background: #dbeafe;
	color: var(--snk-blue);
	font-size: 30px;
	font-weight: 900;
}

.snk-quiz-result h4,
.snk-app .snk-quiz-result h4 {
	margin: 0 0 8px !important;
	color: var(--snk-navy) !important;
	font-size: 25px !important;
}

.snk-footer {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 16px;
	padding: 14px clamp(18px, 4vw, 44px);
	border-top: 1px solid var(--snk-line);
	background: #fff;
	color: #64748b;
	font-size: 11px;
}

.snk-footer a,
.snk-app .snk-footer a {
	color: var(--snk-blue) !important;
	font-weight: 800;
	text-decoration: none !important;
}

.snk-error {
	padding: 12px 14px;
	border: 1px solid #fecaca;
	border-radius: 10px;
	background: #fff1f2;
	color: #991b1b;
	font-weight: 700;
}

@container (max-width: 760px) {
	.snk-lesson-grid { grid-template-columns: 1fr; }
	.snk-section-heading { align-items: flex-start; flex-direction: column; gap: 7px; }
	.snk-section-heading > p { padding-left: 50px; text-align: left; }
	.snk-input-card { grid-template-columns: 1fr 1fr; }
	.snk-input-card .snk-btn { grid-column: 1 / -1; }
	.snk-div-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@container (max-width: 560px) {
	.snk-app { font-size: 15px; }
	.snk-shell { border-radius: 16px; }
	.snk-hero { min-height: 170px; padding: 27px 20px; }
	.snk-hero__visual { display: none; }
	.snk-tabs { gap: 5px; padding: 8px; }
	.snk-app .snk-tab { min-height: 44px; padding: 8px 5px !important; font-size: 12px !important; }
	.snk-app .snk-tab span { display: none; }
	.snk-main { padding: 17px 12px; }
	.snk-section-heading > p { padding-left: 0; }
	.snk-tool-tabs { grid-template-columns: 1fr; }
	.snk-input-card,
	.snk-input-card--compact { grid-template-columns: 1fr; padding: 14px; }
	.snk-input-card .snk-btn { grid-column: auto; width: 100% !important; }
	.snk-result { padding: 12px; }
	.snk-result-grid,
	.snk-options { grid-template-columns: 1fr; }
	.snk-result-title { align-items: flex-start; flex-direction: column; }
	.snk-quiz-features { gap: 6px; }
	.snk-quiz-features div { padding: 12px 5px; }
	.snk-quiz-features span { font-size: 22px; }
	.snk-footer { align-items: flex-start; flex-direction: column; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
	.snk-app *,
	.snk-app *::before,
	.snk-app *::after {
		scroll-behavior: auto !important;
		transition: none !important;
	}
}