/* =========================================================================
   Happy Programming Guide — design system
   1. Tokens        5. Home        9. Code
   2. Base          6. Cards      10. Notes / FAQ
   3. Header        7. Archive    11. Tools (legacy shell)
   4. Buttons       8. Article    12. Footer / responsive
   ========================================================================= */

/* 1. Tokens ------------------------------------------------------------- */

:root {
	--hpg-accent: #4f46e5;
	--hpg-accent-ink: #4338ca;
	--hpg-accent-soft: #eef0fe;
	--hpg-topic: var(--hpg-accent);

	--hpg-bg: #ffffff;
	--hpg-surface: #f7f8fb;
	--hpg-surface-2: #f1f3f8;
	--hpg-line: #e5e8ef;
	--hpg-line-strong: #d3d8e3;

	--hpg-ink: #12141a;
	--hpg-body: #474e5d;
	--hpg-muted: #757d8d;

	--hpg-code-bg: #14161d;
	--hpg-code-bar: #1c1f28;
	--hpg-code-ink: #e5e8f0;
	--hpg-code-line: #2b303c;

	--hpg-radius: 14px;
	--hpg-radius-sm: 10px;
	--hpg-radius-lg: 22px;
	--hpg-max: 1180px;
	--hpg-read: 720px;

	--hpg-shadow-sm: 0 1px 2px rgba(16, 20, 34, .05), 0 1px 3px rgba(16, 20, 34, .04);
	--hpg-shadow: 0 4px 12px rgba(16, 20, 34, .06), 0 12px 30px rgba(16, 20, 34, .06);
	--hpg-shadow-lg: 0 18px 48px rgba(16, 20, 34, .12);

	--hpg-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
	--hpg-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

	--hpg-step: clamp(56px, 7vw, 88px);
	color-scheme: light;
}

[data-theme="dark"] {
	--hpg-accent: #818cf8;
	--hpg-accent-ink: #a5b4fc;
	--hpg-accent-soft: #1e2140;

	--hpg-bg: #0c0e14;
	--hpg-surface: #12151d;
	--hpg-surface-2: #171b25;
	--hpg-line: #242936;
	--hpg-line-strong: #333a4a;

	--hpg-ink: #f2f4f9;
	--hpg-body: #b3bacb;
	--hpg-muted: #8a93a6;

	--hpg-code-bg: #0f1219;
	--hpg-code-bar: #171b24;
	--hpg-code-line: #262c39;

	--hpg-shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
	--hpg-shadow: 0 4px 14px rgba(0, 0, 0, .35);
	--hpg-shadow-lg: 0 20px 50px rgba(0, 0, 0, .5);
	color-scheme: dark;
}

/* 2. Base --------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 86px; }

body {
	margin: 0;
	background: var(--hpg-bg);
	color: var(--hpg-body);
	font-family: var(--hpg-sans);
	font-size: 17px;
	line-height: 1.65;
	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
	overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
	color: var(--hpg-ink);
	font-weight: 700;
	letter-spacing: -.021em;
	line-height: 1.2;
	margin: 0;
	text-wrap: balance;
}

p { margin: 0 0 1.1em; }
img, svg, video { max-width: 100%; height: auto; }
a { color: var(--hpg-accent-ink); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--hpg-accent); }

:focus-visible {
	outline: 2px solid var(--hpg-accent);
	outline-offset: 3px;
	border-radius: 4px;
}

.hpg-sr, .hpg-visually-hidden, .screen-reader-text {
	position: absolute !important;
	width: 1px; height: 1px;
	padding: 0; margin: -1px;
	overflow: hidden;
	clip-path: inset(50%);
	white-space: nowrap;
	border: 0;
}

.hpg-skip {
	position: absolute; left: 12px; top: -60px; z-index: 999;
	background: var(--hpg-accent); color: #fff;
	padding: 10px 16px; border-radius: 8px;
	font-weight: 600; text-decoration: none;
	transition: top .15s ease;
}
.hpg-skip:focus { top: 12px; color: #fff; }

.hpg-wrap { width: 100%; max-width: var(--hpg-max); margin-inline: auto; padding-inline: 20px; }
.hpg-wrap--reading { max-width: calc(var(--hpg-read) + 40px); }

.hpg-scroller { overflow-x: auto; -webkit-overflow-scrolling: touch; }

.hpg-i { flex: none; }

.hpg-kicker {
	margin: 0 0 .55em;
	font-family: var(--hpg-mono);
	font-size: .74rem;
	font-weight: 600;
	letter-spacing: .12em;
	text-transform: uppercase;
	color: var(--hpg-topic);
}

/* 3. Header ------------------------------------------------------------- */

.hpg-header {
	position: sticky; top: 0; z-index: 60;
	background: color-mix(in srgb, var(--hpg-bg) 88%, transparent);
	backdrop-filter: saturate(180%) blur(14px);
	border-bottom: 1px solid transparent;
	transition: border-color .2s ease, box-shadow .2s ease;
}
.hpg-header.is-stuck { border-bottom-color: var(--hpg-line); box-shadow: var(--hpg-shadow-sm); }

.hpg-header__inner {
	display: flex; align-items: center; gap: 18px;
	min-height: 66px;
}

.hpg-brand {
	display: inline-flex; align-items: center; gap: 10px;
	text-decoration: none; color: var(--hpg-ink);
	font-weight: 700; letter-spacing: -.02em;
	flex: none;
}
.hpg-brand__mark {
	display: grid; place-items: center;
	width: 32px; height: 32px;
	border-radius: 9px;
	background: linear-gradient(140deg, var(--hpg-accent), color-mix(in srgb, var(--hpg-accent) 55%, #22d3ee));
	color: #fff;
	font-family: var(--hpg-mono); font-size: .72rem; font-weight: 600;
}
.hpg-brand__name { font-size: 1.02rem; white-space: nowrap; }
.hpg-brand .custom-logo { max-height: 36px; width: auto; }

.hpg-menu { margin-inline-start: 6px; flex: 1 1 auto; min-width: 0; }
.hpg-menu__list { display: flex; align-items: center; gap: 2px; list-style: none; margin: 0; padding: 0; }
.hpg-menu__item { position: relative; }

.hpg-menu__link {
	display: inline-flex; align-items: center; gap: 7px;
	padding: 8px 12px;
	border: 0; background: none;
	color: var(--hpg-body);
	font: inherit; font-size: .935rem; font-weight: 500;
	border-radius: 9px;
	text-decoration: none;
	cursor: pointer;
	white-space: nowrap;
	transition: background .15s ease, color .15s ease;
}
.hpg-menu__link:hover { background: var(--hpg-surface-2); color: var(--hpg-ink); }
.hpg-menu__item.is-current > .hpg-menu__link { color: var(--hpg-ink); font-weight: 600; }

.hpg-menu__chev {
	width: 7px; height: 7px; margin-left: 1px;
	border-right: 1.6px solid currentColor; border-bottom: 1.6px solid currentColor;
	transform: rotate(45deg) translate(-2px, -2px);
	opacity: .6;
	transition: transform .18s ease;
}
[aria-expanded="true"] .hpg-menu__chev { transform: rotate(-135deg) translate(-3px, -3px); }

.hpg-menu__panel {
	position: absolute; top: calc(100% + 8px); left: 0;
	min-width: 290px;
	background: var(--hpg-bg);
	border: 1px solid var(--hpg-line);
	border-radius: var(--hpg-radius);
	box-shadow: var(--hpg-shadow-lg);
	padding: 8px;
	opacity: 0; visibility: hidden;
	transform: translateY(-6px);
	transition: opacity .16s ease, transform .16s ease, visibility .16s;
}
.hpg-menu__item--parent:hover .hpg-menu__panel,
.hpg-menu__item--parent:focus-within .hpg-menu__panel,
.hpg-menu__panel.is-open { opacity: 1; visibility: visible; transform: none; }

.hpg-menu__sub { list-style: none; margin: 0; padding: 0; }
.hpg-menu__sub .hpg-menu__link {
	display: flex; width: 100%; padding: 9px 10px; gap: 11px;
	font-size: .92rem;
}
.hpg-menu__icon {
	display: grid; place-items: center;
	width: 28px; height: 28px; border-radius: 8px; flex: none;
	background: color-mix(in srgb, var(--hpg-topic) 12%, transparent);
	color: var(--hpg-topic);
}

.hpg-header__actions { display: flex; align-items: center; gap: 8px; margin-inline-start: auto; flex: none; }

.hpg-iconbtn {
	display: grid; place-items: center;
	width: 38px; height: 38px;
	border: 1px solid var(--hpg-line);
	border-radius: 10px;
	background: var(--hpg-bg);
	color: var(--hpg-body);
	cursor: pointer;
	transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.hpg-iconbtn:hover { background: var(--hpg-surface-2); color: var(--hpg-ink); border-color: var(--hpg-line-strong); }

.hpg-icon-dark, [data-theme="dark"] .hpg-icon-light { display: none; }
[data-theme="dark"] .hpg-icon-dark { display: block; }

.hpg-burger { display: none; }
.hpg-icon-open { display: none; }
.hpg-burger[aria-expanded="true"] .hpg-icon-open { display: block; }
.hpg-burger[aria-expanded="true"] .hpg-icon-closed { display: none; }

.hpg-search { border-top: 1px solid var(--hpg-line); background: var(--hpg-bg); padding: 18px 0 22px; }
.hpg-search__hint { margin: 10px 0 0; font-size: .84rem; color: var(--hpg-muted); }

.hpg-searchform { position: relative; display: flex; gap: 10px; }
.hpg-searchform__icon { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--hpg-muted); pointer-events: none; }
.hpg-searchform__input {
	flex: 1; min-width: 0;
	padding: 13px 16px 13px 44px;
	font: inherit; font-size: 1rem;
	color: var(--hpg-ink);
	background: var(--hpg-surface);
	border: 1px solid var(--hpg-line);
	border-radius: 11px;
}
.hpg-searchform__input::placeholder { color: var(--hpg-muted); }
.hpg-searchform__input:focus { outline: none; border-color: var(--hpg-accent); box-shadow: 0 0 0 3px var(--hpg-accent-soft); }

/* 4. Buttons ------------------------------------------------------------ */

.hpg-btn, .hpg-cta {
	display: inline-flex; align-items: center; justify-content: center; gap: 8px;
	padding: 11px 20px;
	border: 1px solid transparent;
	border-radius: 11px;
	font: inherit; font-size: .95rem; font-weight: 600;
	line-height: 1.25;
	text-decoration: none;
	cursor: pointer;
	transition: transform .12s ease, background .15s ease, border-color .15s ease, box-shadow .15s ease;
}
.hpg-btn:active, .hpg-cta:active { transform: translateY(1px); }

.hpg-btn--primary, .hpg-cta--primary, .hpg-cta:not([class*="--"]) {
	background: var(--hpg-accent); color: #fff;
	box-shadow: 0 1px 2px rgba(79, 70, 229, .3);
}
.hpg-btn--primary:hover, .hpg-cta--primary:hover, .hpg-cta:not([class*="--"]):hover {
	background: var(--hpg-accent-ink); color: #fff;
}
[data-theme="dark"] .hpg-btn--primary, [data-theme="dark"] .hpg-cta--primary { color: #0c0e14; }
[data-theme="dark"] .hpg-btn--primary:hover, [data-theme="dark"] .hpg-cta--primary:hover { color: #0c0e14; }

.hpg-btn--ghost, .hpg-cta--ghost {
	background: var(--hpg-bg); color: var(--hpg-ink);
	border-color: var(--hpg-line-strong);
}
.hpg-btn--ghost:hover, .hpg-cta--ghost:hover { background: var(--hpg-surface-2); color: var(--hpg-ink); border-color: var(--hpg-muted); }

.hpg-cta--amazon { background: #ff9900; color: #10131a; border-color: #e08600; }
.hpg-cta--amazon:hover { background: #f59400; color: #10131a; }

.hpg-btn--lg { padding: 14px 26px; font-size: 1rem; }
.hpg-cta--sm { padding: 8px 14px; font-size: .86rem; border-radius: 9px; }

.hpg-header__cta { padding: 9px 16px; font-size: .9rem; }

/* 5. Sections & home ---------------------------------------------------- */

.hpg-section { padding: var(--hpg-step) 0; }
.hpg-section--tint { background: var(--hpg-surface); }
.hpg-section--dark { background: var(--hpg-code-bg); }
.hpg-section--dark, .hpg-section--dark .hpg-section__lead { color: #b4bccd; }
.hpg-section--dark .hpg-section__title, .hpg-section--dark .hpg-card__title a { color: #f3f5fa; }
.hpg-section--dark .hpg-card { background: #191d27; border-color: #272d3a; }
.hpg-section--dark .hpg-card__excerpt, .hpg-section--dark .hpg-card__meta { color: #939cb0; }

.hpg-section__head {
	display: flex; flex-wrap: wrap; align-items: flex-end;
	gap: 16px 40px;
	margin-bottom: 34px;
}
.hpg-section__title { font-size: clamp(1.55rem, 3vw, 2.15rem); letter-spacing: -.028em; }
.hpg-section__lead { max-width: 46ch; margin: 0; color: var(--hpg-muted); font-size: .98rem; }
.hpg-section__more {
	display: inline-flex; align-items: center; gap: 6px;
	margin-inline-start: auto;
	font-weight: 600; font-size: .93rem; text-decoration: none;
	color: var(--hpg-accent-ink);
}
.hpg-section__more:hover { gap: 10px; }

.hpg-hero { padding: clamp(46px, 6vw, 76px) 0 clamp(40px, 5vw, 64px); position: relative; overflow: hidden; }
.hpg-hero::before {
	content: ""; position: absolute; inset: 0;
	background:
		radial-gradient(60% 70% at 12% 0%, color-mix(in srgb, var(--hpg-accent) 11%, transparent), transparent 62%),
		radial-gradient(50% 60% at 92% 12%, color-mix(in srgb, #22d3ee 9%, transparent), transparent 60%);
	pointer-events: none;
}
.hpg-hero__inner { position: relative; display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr); gap: clamp(30px, 5vw, 64px); align-items: center; }
.hpg-hero__title { font-size: clamp(2.15rem, 5.2vw, 3.5rem); font-weight: 800; letter-spacing: -.035em; line-height: 1.06; }
.hpg-hero__sub { margin: 20px 0 0; font-size: clamp(1.02rem, 1.6vw, 1.14rem); max-width: 46ch; color: var(--hpg-body); }
.hpg-hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hpg-hero__proof { display: flex; flex-wrap: wrap; gap: 8px 22px; list-style: none; margin: 28px 0 0; padding: 0; font-size: .88rem; color: var(--hpg-muted); }
.hpg-hero__proof li { display: inline-flex; align-items: center; gap: 7px; }
.hpg-hero__proof svg { color: #10b981; }

.hpg-hero__art { position: relative; }
.hpg-window {
	border-radius: var(--hpg-radius);
	background: var(--hpg-code-bg);
	border: 1px solid var(--hpg-code-line);
	box-shadow: var(--hpg-shadow-lg);
	overflow: hidden;
}
.hpg-window__bar {
	display: flex; align-items: center; gap: 12px;
	padding: 11px 14px;
	background: var(--hpg-code-bar);
	border-bottom: 1px solid var(--hpg-code-line);
}
.hpg-window__dots { display: inline-flex; gap: 6px; }
.hpg-window__dots i { width: 10px; height: 10px; border-radius: 50%; background: #3a4152; }
.hpg-window__dots i:first-child { background: #ff5f57; }
.hpg-window__dots i:nth-child(2) { background: #febc2e; }
.hpg-window__dots i:nth-child(3) { background: #28c840; }
.hpg-window__name { font-family: var(--hpg-mono); font-size: .78rem; color: #8b93a7; }
.hpg-window__code {
	margin: 0; padding: 20px 18px 22px;
	font-family: var(--hpg-mono); font-size: .845rem; line-height: 1.75;
	color: #dfe4ee;
	overflow-x: auto;
}
.hpg-window__code .c { color: #6b7487; font-style: italic; }
.hpg-window__code .k { color: #c792ea; }
.hpg-window__code .s { color: #7ee0a1; }
.hpg-window__code .f { color: #82aaff; }

.hpg-window__badge {
	position: absolute; right: -8px; bottom: -16px;
	display: inline-flex; align-items: center; gap: 7px;
	padding: 9px 14px;
	background: var(--hpg-bg);
	border: 1px solid var(--hpg-line);
	border-radius: 999px;
	box-shadow: var(--hpg-shadow);
	font-size: .82rem; font-weight: 600; color: var(--hpg-ink);
}
.hpg-window__badge svg { color: #f59e0b; }

.hpg-grid { display: grid; gap: 20px; }
.hpg-grid > *, .hpg-split > *, .hpg-hero__inner > *, .hpg-article__layout > *, .hpg-cta-card > * { min-width: 0; }
.hpg-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.hpg-grid--topics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.hpg-grid--tools { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }

.hpg-topic {
	display: flex; flex-direction: column; gap: 9px;
	padding: 22px;
	background: var(--hpg-bg);
	border: 1px solid var(--hpg-line);
	border-radius: var(--hpg-radius);
	text-decoration: none;
	transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.hpg-topic:hover { transform: translateY(-3px); box-shadow: var(--hpg-shadow); border-color: color-mix(in srgb, var(--hpg-topic) 40%, var(--hpg-line)); }
.hpg-topic__icon {
	display: grid; place-items: center;
	width: 44px; height: 44px; border-radius: 12px;
	background: color-mix(in srgb, var(--hpg-topic) 13%, transparent);
	color: var(--hpg-topic);
	margin-bottom: 4px;
}
.hpg-topic__name { color: var(--hpg-ink); font-weight: 700; font-size: 1.08rem; letter-spacing: -.02em; }
.hpg-topic__blurb { color: var(--hpg-muted); font-size: .91rem; line-height: 1.55; }
.hpg-topic__foot { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: 12px; }
.hpg-topic__count { font-family: var(--hpg-mono); font-size: .76rem; color: var(--hpg-muted); }
.hpg-topic__go { color: var(--hpg-topic); display: inline-flex; transition: transform .16s ease; }
.hpg-topic:hover .hpg-topic__go { transform: translateX(4px); }

.hpg-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; list-style: none; margin: 0; padding: 0; counter-reset: none; }
.hpg-step {
	position: relative;
	padding: 24px 22px 22px;
	background: var(--hpg-bg);
	border: 1px solid var(--hpg-line);
	border-radius: var(--hpg-radius);
}
.hpg-step::before { content: ""; position: absolute; left: 0; top: 22px; bottom: 22px; width: 3px; border-radius: 0 3px 3px 0; background: var(--hpg-topic); }
.hpg-step__num { font-family: var(--hpg-mono); font-size: .78rem; font-weight: 600; color: var(--hpg-topic); }
.hpg-step__title { margin: 8px 0 8px; font-size: 1.06rem; }
.hpg-step__text { margin: 0 0 14px; font-size: .93rem; color: var(--hpg-muted); }
.hpg-step__link { display: inline-flex; align-items: center; gap: 6px; font-size: .88rem; font-weight: 600; text-decoration: none; color: var(--hpg-topic); }
.hpg-step__link:hover { gap: 10px; color: var(--hpg-topic); }

.hpg-split { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(28px, 5vw, 60px); align-items: center; }
.hpg-linklist { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--hpg-line); }
.hpg-linklist li { border-bottom: 1px solid var(--hpg-line); }
.hpg-linklist a {
	display: flex; align-items: center; gap: 14px;
	padding: 17px 4px;
	text-decoration: none; color: var(--hpg-ink);
	transition: padding .16s ease, color .16s ease;
}
.hpg-linklist a:hover { padding-inline: 10px 0; color: var(--hpg-accent-ink); }
.hpg-linklist__title { font-weight: 600; font-size: 1rem; flex: 1; }
.hpg-linklist__meta { font-family: var(--hpg-mono); font-size: .76rem; color: var(--hpg-muted); }
.hpg-linklist svg { color: var(--hpg-muted); }

.hpg-tool {
	display: flex; flex-direction: column; gap: 6px;
	padding: 18px;
	background: var(--hpg-bg);
	border: 1px solid var(--hpg-line);
	border-radius: var(--hpg-radius-sm);
	text-decoration: none;
	transition: border-color .16s ease, box-shadow .16s ease, transform .16s ease;
}
.hpg-tool:hover { border-color: var(--hpg-accent); box-shadow: var(--hpg-shadow-sm); transform: translateY(-2px); }
.hpg-tool__icon { color: var(--hpg-accent); }
.hpg-tool__name { color: var(--hpg-ink); font-weight: 650; font-size: .96rem; }
.hpg-tool__desc { color: var(--hpg-muted); font-size: .855rem; line-height: 1.5; }

.hpg-section--cta { padding-bottom: calc(var(--hpg-step) + 10px); }
.hpg-cta-card {
	display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
	gap: clamp(22px, 4vw, 48px); align-items: center;
	padding: clamp(28px, 4vw, 44px);
	border-radius: var(--hpg-radius-lg);
	background:
		radial-gradient(70% 120% at 0% 0%, color-mix(in srgb, var(--hpg-accent) 14%, transparent), transparent 65%),
		var(--hpg-surface);
	border: 1px solid var(--hpg-line);
}
.hpg-cta-card__icon {
	display: inline-grid; place-items: center;
	width: 46px; height: 46px; border-radius: 13px; margin-bottom: 16px;
	background: var(--hpg-accent); color: #fff;
}
[data-theme="dark"] .hpg-cta-card__icon { color: #0c0e14; }
.hpg-cta-card__lead { margin: 12px 0 0; color: var(--hpg-muted); }
.hpg-cta-card__buttons { display: flex; flex-wrap: wrap; gap: 12px; }
.hpg-subscribe { display: flex; gap: 10px; flex-wrap: wrap; }
.hpg-subscribe__input {
	flex: 1 1 210px; min-width: 0;
	padding: 13px 16px;
	font: inherit;
	color: var(--hpg-ink); background: var(--hpg-bg);
	border: 1px solid var(--hpg-line-strong); border-radius: 11px;
}
.hpg-subscribe__input:focus { outline: none; border-color: var(--hpg-accent); box-shadow: 0 0 0 3px var(--hpg-accent-soft); }

/* 6. Cards -------------------------------------------------------------- */

.hpg-card {
	display: flex; flex-direction: column;
	background: var(--hpg-bg);
	border: 1px solid var(--hpg-line);
	border-radius: var(--hpg-radius);
	overflow: hidden;
	transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.hpg-card:hover { transform: translateY(-3px); box-shadow: var(--hpg-shadow); border-color: color-mix(in srgb, var(--hpg-topic) 35%, var(--hpg-line)); }
.hpg-card__media { display: block; aspect-ratio: 16 / 9; background: var(--hpg-surface); overflow: hidden; }
.hpg-cover { display: block; width: 100%; height: 100%; object-fit: cover; }
.hpg-card__body { display: flex; flex-direction: column; gap: 10px; padding: 18px 20px 20px; flex: 1; }
.hpg-card__title { font-size: 1.09rem; line-height: 1.32; letter-spacing: -.022em; }
.hpg-card__title a { color: var(--hpg-ink); text-decoration: none; }
.hpg-card__title a:hover { color: var(--hpg-accent-ink); }
.hpg-card__excerpt { margin: 0; font-size: .92rem; color: var(--hpg-muted); line-height: 1.55; }
.hpg-card__meta { margin: auto 0 0; padding-top: 4px; font-family: var(--hpg-mono); font-size: .74rem; color: var(--hpg-muted); display: flex; gap: 7px; flex-wrap: wrap; }

.hpg-tag {
	display: inline-flex; align-items: center; gap: 6px;
	align-self: flex-start;
	padding: 4px 10px 4px 8px;
	border-radius: 999px;
	background: color-mix(in srgb, var(--hpg-topic) 12%, transparent);
	color: var(--hpg-topic);
	font-size: .765rem; font-weight: 600; letter-spacing: -.005em;
	text-decoration: none;
	transition: background .15s ease;
}
.hpg-tag:hover { background: color-mix(in srgb, var(--hpg-topic) 20%, transparent); color: var(--hpg-topic); }
.hpg-tag--lg { padding: 6px 14px 6px 11px; font-size: .84rem; }

.hpg-chips { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 30px; }
.hpg-chip {
	display: inline-flex; align-items: center; gap: 7px;
	padding: 7px 14px;
	border: 1px solid var(--hpg-line);
	border-radius: 999px;
	background: var(--hpg-bg);
	color: var(--hpg-body);
	font-size: .86rem; font-weight: 500; text-decoration: none;
	transition: border-color .15s ease, color .15s ease, background .15s ease;
}
.hpg-chip:hover { border-color: var(--hpg-topic); color: var(--hpg-topic); background: color-mix(in srgb, var(--hpg-topic) 8%, transparent); }
.hpg-chip svg { color: var(--hpg-topic); }

.hpg-pill {
	display: inline-flex; align-items: center; gap: 6px;
	padding: 4px 11px; border-radius: 999px;
	background: var(--hpg-accent-soft); color: var(--hpg-accent-ink);
	font-size: .76rem; font-weight: 600;
}
.hpg-pill--mint { background: #dcfce7; color: #047857; }
[data-theme="dark"] .hpg-pill--mint { background: #06301f; color: #6ee7b7; }

/* 7. Archive ------------------------------------------------------------ */

.hpg-archhead {
	padding: 34px 0 40px;
	border-bottom: 1px solid var(--hpg-line);
	background:
		radial-gradient(46% 110% at 8% 0%, color-mix(in srgb, var(--hpg-topic) 10%, transparent), transparent 70%),
		var(--hpg-bg);
}
.hpg-archhead__inner { display: flex; align-items: flex-start; gap: 18px; margin-top: 14px; }
.hpg-archhead__icon {
	display: grid; place-items: center;
	width: 60px; height: 60px; border-radius: 16px; flex: none;
	background: color-mix(in srgb, var(--hpg-topic) 13%, transparent);
	color: var(--hpg-topic);
}
.hpg-archhead__title { font-size: clamp(1.85rem, 4vw, 2.6rem); letter-spacing: -.032em; }
.hpg-archhead__desc { margin: 12px 0 0; max-width: 62ch; font-size: 1.03rem; color: var(--hpg-body); }
.hpg-archhead__count { margin: 12px 0 0; font-family: var(--hpg-mono); font-size: .78rem; color: var(--hpg-muted); }
.hpg-archhead__search { margin-top: 22px; max-width: 560px; }

.hpg-crumbs { font-size: .82rem; color: var(--hpg-muted); }
.hpg-crumbs ol { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.hpg-crumbs li + li::before { content: "/"; margin-right: 8px; opacity: .5; }
.hpg-crumbs a { color: var(--hpg-muted); text-decoration: none; }
.hpg-crumbs a:hover { color: var(--hpg-accent-ink); text-decoration: underline; }
.hpg-crumbs [aria-current] { color: var(--hpg-body); }

.hpg-results { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.hpg-result {
	display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 20px;
	padding: 16px;
	border: 1px solid var(--hpg-line); border-radius: var(--hpg-radius);
	background: var(--hpg-bg);
	transition: border-color .16s ease, box-shadow .16s ease;
}
.hpg-result:hover { border-color: color-mix(in srgb, var(--hpg-topic) 40%, var(--hpg-line)); box-shadow: var(--hpg-shadow-sm); }
.hpg-result__media { display: block; aspect-ratio: 16 / 9; border-radius: var(--hpg-radius-sm); overflow: hidden; background: var(--hpg-surface); }
.hpg-result__body { display: flex; flex-direction: column; gap: 7px; }
.hpg-result__kind { margin: 0; font-family: var(--hpg-mono); font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--hpg-topic); }
.hpg-result__title { font-size: 1.14rem; }
.hpg-result__title a { color: var(--hpg-ink); text-decoration: none; }
.hpg-result__title a:hover { color: var(--hpg-accent-ink); }
.hpg-result__excerpt { margin: 0; font-size: .93rem; color: var(--hpg-muted); }
.hpg-result__meta { margin: auto 0 0; font-family: var(--hpg-mono); font-size: .74rem; color: var(--hpg-muted); display: flex; gap: 7px; }

.hpg-empty { text-align: center; padding: 50px 20px; border: 1px dashed var(--hpg-line-strong); border-radius: var(--hpg-radius); }
.hpg-empty h2 { font-size: 1.3rem; margin-bottom: 10px; }
.hpg-empty p { color: var(--hpg-muted); }
.hpg-empty .hpg-searchform { max-width: 460px; margin: 22px auto 0; }

.hpg-pager { display: flex; flex-wrap: wrap; gap: 7px; justify-content: center; margin-top: 42px; }
.hpg-pager .page-numbers {
	display: grid; place-items: center;
	min-width: 40px; height: 40px; padding: 0 12px;
	border: 1px solid var(--hpg-line); border-radius: 10px;
	color: var(--hpg-body); text-decoration: none; font-size: .92rem; font-weight: 500;
}
.hpg-pager .page-numbers:hover { border-color: var(--hpg-accent); color: var(--hpg-accent-ink); }
.hpg-pager .page-numbers.current { background: var(--hpg-accent); border-color: var(--hpg-accent); color: #fff; }
[data-theme="dark"] .hpg-pager .page-numbers.current { color: #0c0e14; }
.hpg-pager .dots { border-color: transparent; }

.hpg-404 { text-align: center; padding-bottom: 20px; }
.hpg-404__text { color: var(--hpg-muted); margin: 14px auto 26px; max-width: 46ch; }

/* 8. Article ------------------------------------------------------------ */

.hpg-article__head { padding: 30px 0 26px; }
.hpg-article__head .hpg-tag { margin: 18px 0 14px; }
.hpg-article__title { font-size: clamp(2rem, 4.4vw, 2.85rem); font-weight: 800; letter-spacing: -.035em; line-height: 1.1; }
.hpg-article__standfirst { margin: 18px 0 0; font-size: 1.14rem; color: var(--hpg-body); line-height: 1.6; }
.hpg-article__meta {
	display: flex; flex-wrap: wrap; align-items: center; gap: 9px;
	margin-top: 22px; padding-top: 18px;
	border-top: 1px solid var(--hpg-line);
	font-size: .855rem; color: var(--hpg-muted);
}
.hpg-article__byline { font-weight: 600; color: var(--hpg-body); }
.hpg-article__time { display: inline-flex; align-items: center; gap: 5px; }
.hpg-article__updated { color: var(--hpg-accent-ink); font-weight: 500; }
.hpg-article__hero { margin-bottom: 34px; }
.hpg-article__img { width: 100%; border-radius: var(--hpg-radius-lg); }

.hpg-article__layout { display: block; }
.hpg-article__body { max-width: var(--hpg-read); margin-inline: auto; }
.hpg-article--page.is-tool .hpg-article__body { max-width: none; }

@media (min-width: 1120px) {
	.hpg-article.has-toc .hpg-article__layout {
		display: grid;
		grid-template-columns: 232px minmax(0, 1fr);
		gap: 56px;
		align-items: start;
		max-width: calc(var(--hpg-read) + 232px + 56px + 40px);
	}
	.hpg-article.has-toc .hpg-article__body { margin-inline: 0; }
	.hpg-article__rail { position: sticky; top: 92px; max-height: calc(100vh - 120px); overflow-y: auto; }
}

.hpg-toc {
	padding: 18px 18px 20px;
	border: 1px solid var(--hpg-line);
	border-radius: var(--hpg-radius);
	background: var(--hpg-surface);
	margin-bottom: 34px;
}
.hpg-toc__title { display: flex; align-items: center; gap: 8px; font-size: .78rem; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; color: var(--hpg-muted); margin-bottom: 12px; }
.hpg-toc__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.hpg-toc__item a {
	display: block; padding: 5px 10px;
	border-left: 2px solid transparent;
	color: var(--hpg-body); font-size: .885rem; line-height: 1.45;
	text-decoration: none;
	border-radius: 0 6px 6px 0;
	transition: color .14s ease, border-color .14s ease, background .14s ease;
}
.hpg-toc__item a:hover { color: var(--hpg-ink); background: var(--hpg-surface-2); }
.hpg-toc__item--h3 a { padding-left: 22px; font-size: .84rem; color: var(--hpg-muted); }
.hpg-toc__item.is-active > a { color: var(--hpg-topic); border-left-color: var(--hpg-topic); font-weight: 600; background: color-mix(in srgb, var(--hpg-topic) 7%, transparent); }

@media (min-width: 1120px) {
	.hpg-article.has-toc .hpg-toc { background: transparent; border: 0; padding: 0; }
	.hpg-article.has-toc .hpg-toc__list { border-left: 1px solid var(--hpg-line); }
}

/* Prose */
.hpg-prose { font-size: 1.075rem; line-height: 1.75; color: var(--hpg-body); }
.hpg-prose > h2 { font-size: clamp(1.45rem, 2.6vw, 1.75rem); margin: 2.1em 0 .6em; letter-spacing: -.028em; scroll-margin-top: 92px; }
.hpg-prose > h3 { font-size: clamp(1.16rem, 2vw, 1.3rem); margin: 1.7em 0 .5em; scroll-margin-top: 92px; }
.hpg-prose > h4 { font-size: 1.06rem; margin: 1.5em 0 .4em; }
.hpg-prose > h2:first-child, .hpg-prose > h3:first-child { margin-top: 0; }
.hpg-prose p { margin: 0 0 1.15em; }
.hpg-prose > ul, .hpg-prose > ol { margin: 0 0 1.3em; padding-left: 1.35em; }
.hpg-prose li { margin-bottom: .5em; }
.hpg-prose li::marker { color: var(--hpg-topic); }
.hpg-prose a { color: var(--hpg-accent-ink); text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--hpg-accent) 40%, transparent); text-underline-offset: 3px; }
.hpg-prose a:hover { text-decoration-color: currentColor; }
.hpg-prose strong { color: var(--hpg-ink); font-weight: 650; }
.hpg-prose hr { border: 0; border-top: 1px solid var(--hpg-line); margin: 2.4em 0; }
.hpg-prose img { border-radius: var(--hpg-radius); }
.hpg-prose blockquote {
	margin: 1.7em 0; padding: 4px 0 4px 22px;
	border-left: 3px solid var(--hpg-topic);
	color: var(--hpg-ink); font-size: 1.06rem;
}
.hpg-prose blockquote p:last-child { margin-bottom: 0; }

.hpg-anchor {
	margin-left: .4em;
	color: var(--hpg-line-strong);
	text-decoration: none;
	font-weight: 400;
	opacity: 0;
	transition: opacity .15s ease;
}
h2:hover > .hpg-anchor, h3:hover > .hpg-anchor, .hpg-anchor:focus { opacity: 1; }

.hpg-prose table { width: 100%; border-collapse: collapse; font-size: .95rem; margin: 0; min-width: 480px; }
.hpg-prose .hpg-scroller { margin: 1.6em 0; border: 1px solid var(--hpg-line); border-radius: var(--hpg-radius-sm); }
.hpg-prose th, .hpg-prose td { padding: 11px 15px; text-align: left; border-bottom: 1px solid var(--hpg-line); }
.hpg-prose th { background: var(--hpg-surface); color: var(--hpg-ink); font-weight: 650; font-size: .87rem; }
.hpg-prose tr:last-child td { border-bottom: 0; }

.hpg-prose :not(pre) > code {
	font-family: var(--hpg-mono);
	font-size: .875em;
	padding: .16em .42em;
	border-radius: 5px;
	background: var(--hpg-surface-2);
	border: 1px solid var(--hpg-line);
	color: var(--hpg-ink);
	word-break: break-word;
}

.hpg-article__foot { padding: 10px 0 var(--hpg-step); }
.hpg-nextcard {
	display: flex; align-items: center; gap: 18px;
	margin-top: 40px; padding: 22px 24px;
	border: 1px solid var(--hpg-line);
	border-radius: var(--hpg-radius);
	background: var(--hpg-surface);
	text-decoration: none;
	transition: border-color .16s ease, box-shadow .16s ease, transform .16s ease;
}
.hpg-nextcard:hover { border-color: var(--hpg-topic); box-shadow: var(--hpg-shadow); transform: translateY(-2px); }
.hpg-nextcard__kicker { display: block; font-family: var(--hpg-mono); font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: var(--hpg-topic); margin-bottom: 5px; }
.hpg-nextcard__title { display: block; color: var(--hpg-ink); font-weight: 700; font-size: 1.12rem; letter-spacing: -.02em; }
.hpg-nextcard__go { margin-left: auto; color: var(--hpg-topic); flex: none; }

.hpg-nextlink {
	display: flex; align-items: center; gap: 14px;
	margin: 1.8em 0; padding: 16px 20px;
	border: 1px solid var(--hpg-line); border-left: 3px solid var(--hpg-topic);
	border-radius: var(--hpg-radius-sm);
	background: var(--hpg-surface);
	text-decoration: none;
}
.hpg-nextlink:hover { background: var(--hpg-surface-2); }
.hpg-nextlink__kicker { font-family: var(--hpg-mono); font-size: .7rem; text-transform: uppercase; letter-spacing: .1em; color: var(--hpg-muted); display: block; }
.hpg-nextlink__label { font-weight: 650; color: var(--hpg-ink); }
.hpg-nextlink svg { margin-left: auto; color: var(--hpg-topic); }

.hpg-article__tags { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 8px; }
.hpg-article__tags a {
	padding: 5px 12px; border-radius: 999px;
	border: 1px solid var(--hpg-line); background: var(--hpg-bg);
	font-size: .82rem; color: var(--hpg-muted); text-decoration: none;
}
.hpg-article__tags a:hover { border-color: var(--hpg-accent); color: var(--hpg-accent-ink); }

/* 9. Code blocks -------------------------------------------------------- */

.hpg-code {
	margin: 1.7em 0;
	border-radius: var(--hpg-radius);
	background: var(--hpg-code-bg);
	border: 1px solid var(--hpg-code-line);
	overflow: hidden;
}
.hpg-code__bar {
	display: flex; align-items: center; gap: 12px;
	padding: 9px 12px 9px 14px;
	background: var(--hpg-code-bar);
	border-bottom: 1px solid var(--hpg-code-line);
}
.hpg-code__dots { display: inline-flex; gap: 6px; }
.hpg-code__dots i { width: 9px; height: 9px; border-radius: 50%; background: #3a4152; }
.hpg-code__dots i:first-child { background: #ff5f57; }
.hpg-code__dots i:nth-child(2) { background: #febc2e; }
.hpg-code__dots i:nth-child(3) { background: #28c840; }
.hpg-code__lang { font-family: var(--hpg-mono); font-size: .74rem; font-weight: 600; letter-spacing: .04em; color: #949cb0; }
.hpg-code__copy {
	margin-left: auto;
	padding: 5px 12px;
	border: 1px solid #333a49; border-radius: 7px;
	background: transparent; color: #b9c1d2;
	font: inherit; font-size: .76rem; font-weight: 600; font-family: var(--hpg-mono);
	cursor: pointer;
	transition: background .14s ease, color .14s ease, border-color .14s ease;
}
.hpg-code__copy:hover { background: #262c39; color: #fff; border-color: #454e61; }
.hpg-code__copy.is-done { color: #6ee7b7; border-color: #1c5744; }

.hpg-code pre {
	margin: 0; padding: 18px 18px 20px;
	overflow-x: auto;
	font-family: var(--hpg-mono);
	font-size: .875rem;
	line-height: 1.72;
	color: var(--hpg-code-ink);
	tab-size: 4;
}
.hpg-code code { font-family: inherit; background: none; border: 0; padding: 0; color: inherit; white-space: pre; }

.tok-c { color: #6b7487; font-style: italic; }
.tok-k { color: #c792ea; }
.tok-s { color: #7ee0a1; }
.tok-n { color: #f7a072; }
.tok-f { color: #82aaff; }
.tok-b { color: #56cfe1; }
.tok-o { color: #a9b3c9; }
.tok-t { color: #ff7b93; }
.tok-a { color: #ffd479; }

/* 10. Notes, takeaways, FAQ --------------------------------------------- */

.hpg-note, .hpg-disclosure {
	margin: 1.7em 0;
	padding: 16px 20px;
	border: 1px solid var(--hpg-line);
	border-left: 3px solid var(--hpg-accent);
	border-radius: var(--hpg-radius-sm);
	background: var(--hpg-surface);
	font-size: .98rem;
}
.hpg-note__head { display: flex; align-items: center; gap: 8px; margin: 0 0 6px; font-weight: 700; color: var(--hpg-ink); font-size: .93rem; }
.hpg-note__body > :last-child { margin-bottom: 0; }
.hpg-note--tip { border-left-color: #f59e0b; }
.hpg-note--tip .hpg-note__head { color: #b45309; }
.hpg-note--warning, .hpg-note--mistake { border-left-color: #e11d48; }
.hpg-note--warning .hpg-note__head, .hpg-note--mistake .hpg-note__head { color: #be123c; }
.hpg-note--try { border-left-color: #059669; }
.hpg-note--try .hpg-note__head { color: #047857; }
[data-theme="dark"] .hpg-note--tip .hpg-note__head { color: #fbbf24; }
[data-theme="dark"] .hpg-note--warning .hpg-note__head, [data-theme="dark"] .hpg-note--mistake .hpg-note__head { color: #fb7185; }
[data-theme="dark"] .hpg-note--try .hpg-note__head { color: #6ee7b7; }

.hpg-disclosure { font-size: .89rem; color: var(--hpg-muted); border-left-color: var(--hpg-line-strong); }
.hpg-disclosure--education { border-left-color: #0d9488; }
.hpg-disclosure--ai { border-left-color: #9333ea; }
.hpg-disclosure--security { border-left-color: #e11d48; }

.hpg-takeaways {
	margin: 1.8em 0;
	padding: 22px 24px;
	border-radius: var(--hpg-radius);
	background: color-mix(in srgb, var(--hpg-topic) 7%, var(--hpg-surface));
	border: 1px solid color-mix(in srgb, var(--hpg-topic) 22%, var(--hpg-line));
}
.hpg-takeaways__title { display: flex; align-items: center; gap: 9px; font-size: 1rem; margin-bottom: 10px; color: var(--hpg-ink); }
.hpg-takeaways__title svg { color: var(--hpg-topic); }
.hpg-takeaways ul { margin: 0; padding-left: 1.25em; }
.hpg-takeaways li { margin-bottom: .35em; }
.hpg-takeaways > :last-child { margin-bottom: 0; }

.hpg-faq { margin: 2.2em 0 1.6em; }
.hpg-faq__title { font-size: clamp(1.45rem, 2.6vw, 1.75rem); margin-bottom: .7em; letter-spacing: -.028em; }
.hpg-faq__item { border-bottom: 1px solid var(--hpg-line); }
.hpg-faq__item summary {
	display: flex; align-items: center; justify-content: space-between; gap: 16px;
	padding: 15px 2px;
	cursor: pointer;
	color: var(--hpg-ink); font-weight: 650; font-size: 1.02rem;
	list-style: none;
}
.hpg-faq__item summary::-webkit-details-marker { display: none; }
.hpg-faq__item summary::after {
	content: ""; flex: none;
	width: 9px; height: 9px;
	border-right: 2px solid var(--hpg-muted); border-bottom: 2px solid var(--hpg-muted);
	transform: rotate(45deg) translateY(-2px);
	transition: transform .18s ease;
}
.hpg-faq__item[open] summary::after { transform: rotate(-135deg) translateY(-2px); }
.hpg-faq__answer { padding: 0 2px 16px; color: var(--hpg-body); }
.hpg-faq__answer > :last-child { margin-bottom: 0; }

/* 11. Interactive tools — shared shell for the carried-over tool scripts -- */

.hpg-toolroot { margin: 1.6em 0; display: block; }

.hpg-form { display: grid; gap: 16px; margin: 1.2em 0; }
.hpg-form--grid { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.hpg-form__field { display: grid; gap: 7px; }
.hpg-form__label { font-size: .87rem; font-weight: 650; color: var(--hpg-ink); }
.hpg-form__field--checks { display: grid; gap: 9px; }
.hpg-form__actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 4px; }
.hpg-form__error { color: #be123c; font-size: .86rem; }
[data-theme="dark"] .hpg-form__error { color: #fb7185; }

.hpg-form input[type="text"], .hpg-form input[type="number"], .hpg-form input[type="email"],
.hpg-form input[type="url"], .hpg-form input[type="search"], .hpg-form select, .hpg-form textarea,
input[type="search"].hpg-langdb__search, input[type="search"].hpg-conceptdb__search {
	width: 100%;
	padding: 11px 14px;
	font: inherit; font-size: .95rem;
	color: var(--hpg-ink);
	background: var(--hpg-bg);
	border: 1px solid var(--hpg-line-strong);
	border-radius: 10px;
}
.hpg-form textarea { min-height: 96px; resize: vertical; }
.hpg-form input:focus, .hpg-form select:focus, .hpg-form textarea:focus,
input[type="search"]:focus {
	outline: none; border-color: var(--hpg-accent); box-shadow: 0 0 0 3px var(--hpg-accent-soft);
}
.hpg-form label { font-size: .93rem; }
.hpg-form input[type="checkbox"], .hpg-form input[type="radio"] { accent-color: var(--hpg-accent); width: 17px; height: 17px; }

/* Explicit rules for the components the tool scripts actually render.
   Class names harvested from the live DOM of all twelve tools. */

/* Quiz */
.hpg-quiz__progress { height: 6px; border-radius: 999px; background: var(--hpg-surface-2); overflow: hidden; margin-bottom: 16px; }
.hpg-quiz__progressbar { height: 100%; border-radius: 999px; background: var(--hpg-accent); transition: width .3s ease; }
.hpg-quiz__step { margin: 0 0 6px; font-family: var(--hpg-mono); font-size: .76rem; letter-spacing: .08em; text-transform: uppercase; color: var(--hpg-muted); }
.hpg-quiz__q { font-size: 1.25rem; margin-bottom: 16px; }
.hpg-quiz__options { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; margin-bottom: 18px; }
.hpg-quiz__option {
	display: block; width: 100%; text-align: left;
	padding: 14px 16px;
	border: 1px solid var(--hpg-line); border-radius: var(--hpg-radius-sm);
	background: var(--hpg-bg); color: var(--hpg-ink);
	font: inherit; font-size: .95rem; font-weight: 500;
	cursor: pointer;
	transition: border-color .15s ease, background .15s ease;
}
.hpg-quiz__option:hover { border-color: var(--hpg-accent); background: var(--hpg-surface); }
.hpg-quiz__option.is-active {
	border-color: var(--hpg-accent);
	background: var(--hpg-accent-soft);
	color: var(--hpg-accent-ink);
	font-weight: 600;
	box-shadow: 0 0 0 1px var(--hpg-accent) inset;
}
.hpg-quiz__nav { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.hpg-quiz__hint { margin: 10px 0 0; font-size: .85rem; color: var(--hpg-muted); }

/* Roadmap */
.hpg-roadmap__head { display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-end; margin-bottom: 18px; }
.hpg-roadmap__pick { display: grid; gap: 6px; font-size: .87rem; font-weight: 600; color: var(--hpg-ink); }
.hpg-roadmap__pick select { padding: 10px 14px; border: 1px solid var(--hpg-line-strong); border-radius: 10px; background: var(--hpg-bg); color: var(--hpg-ink); font: inherit; }
.hpg-roadmap__progress { flex: 1 1 220px; min-width: 0; }
.hpg-roadmap__progress-label { margin: 8px 0 0; font-family: var(--hpg-mono); font-size: .76rem; color: var(--hpg-muted); }
.hpg-roadmap__timeline { list-style: none; margin: 0; padding: 0 0 0 26px; position: relative; display: grid; gap: 14px; }
.hpg-roadmap__timeline::before { content: ""; position: absolute; left: 5px; top: 8px; bottom: 8px; width: 2px; background: var(--hpg-line); }
.hpg-roadmap__step { position: relative; padding: 16px 18px; border: 1px solid var(--hpg-line); border-radius: var(--hpg-radius-sm); background: var(--hpg-bg); }
.hpg-roadmap__step.is-start { border-color: var(--hpg-accent); box-shadow: 0 0 0 3px var(--hpg-accent-soft); }
.hpg-roadmap__step.is-locked { opacity: .55; }
.hpg-roadmap__dot { position: absolute; left: -26px; top: 22px; width: 12px; height: 12px; border-radius: 50%; background: var(--hpg-accent); border: 2px solid var(--hpg-bg); }
.hpg-roadmap__title { font-size: 1.02rem; margin-bottom: 6px; }
.hpg-roadmap__what, .hpg-roadmap__locked { margin: 0; font-size: .9rem; color: var(--hpg-muted); }
.hpg-roadmap__body { display: grid; gap: 8px; }
.hpg-roadmap__body > .hpg-cta, .hpg-roadmap__body > .hpg-pill { justify-self: start; }
.hpg-toolroot .hpg-cta, .hpg-toolroot .hpg-pill, .hpg-toolroot .hpg-chip { justify-self: start; }

/* Language database */
.hpg-langdb__bar, .hpg-conceptdb__bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
.hpg-langdb__search, .hpg-conceptdb__search { flex: 1 1 220px; padding: 11px 14px; border: 1px solid var(--hpg-line-strong); border-radius: 10px; background: var(--hpg-bg); color: var(--hpg-ink); font: inherit; }
.hpg-langdb__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.hpg-langdb__card { padding: 18px; border: 1px solid var(--hpg-line); border-radius: var(--hpg-radius); background: var(--hpg-bg); }
.hpg-langdb__name { font-size: 1.05rem; margin-bottom: 4px; }
.hpg-langdb__label { margin: 10px 0 4px; font-size: .74rem; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; color: var(--hpg-muted); }
.hpg-langdb__uses { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.hpg-langdb__uses li { padding: 3px 9px; border-radius: 999px; background: var(--hpg-surface-2); font-size: .78rem; }
.hpg-langdb__tags { display: flex; flex-wrap: wrap; gap: 7px; }
.hpg-langdb__tag { padding: 6px 12px; border: 1px solid var(--hpg-line); border-radius: 999px; background: var(--hpg-bg); color: var(--hpg-body); font: inherit; font-size: .82rem; cursor: pointer; }
.hpg-langdb__tag:hover, .hpg-langdb__tag.is-active { border-color: var(--hpg-accent); color: var(--hpg-accent-ink); background: var(--hpg-accent-soft); }
.hpg-langdb__curve { display: inline-block; padding: 3px 10px; border-radius: 999px; background: var(--hpg-accent-soft); color: var(--hpg-accent-ink); font-size: .76rem; font-weight: 600; }
.hpg-langdb__empty { padding: 26px; text-align: center; color: var(--hpg-muted); }

/* Concept explorer */
.hpg-conceptdb__list, .hpg-conceptdb__groups { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.hpg-conceptdb__item { border: 1px solid var(--hpg-line); border-radius: var(--hpg-radius-sm); background: var(--hpg-bg); overflow: hidden; }
.hpg-conceptdb__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; width: 100%; padding: 13px 16px; border: 0; background: none; color: var(--hpg-ink); font: inherit; font-weight: 600; text-align: left; cursor: pointer; }
.hpg-conceptdb__head:hover { background: var(--hpg-surface); }
.hpg-conceptdb__group { font-family: var(--hpg-mono); font-size: .72rem; text-transform: uppercase; letter-spacing: .07em; color: var(--hpg-muted); }
.hpg-conceptdb__detail { padding: 0 16px 16px; font-size: .94rem; }
.hpg-conceptdb__example { margin-top: 10px; }
.hpg-conceptdb__related { margin-top: 10px; font-size: .86rem; color: var(--hpg-muted); }

/* Desk planner */
.hpg-desk__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.hpg-desk__palette-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.hpg-desk__chip { display: inline-flex; align-items: center; gap: 7px; padding: 8px 13px; border: 1px solid var(--hpg-line); border-radius: 999px; background: var(--hpg-bg); color: var(--hpg-body); font: inherit; font-size: .86rem; cursor: pointer; }
.hpg-desk__chip:hover { border-color: var(--hpg-accent); color: var(--hpg-accent-ink); }
.hpg-desk__schematic { display: grid; gap: 12px; }
.hpg-desk__zone { min-height: 90px; padding: 14px; border: 1px dashed var(--hpg-line-strong); border-radius: var(--hpg-radius-sm); background: var(--hpg-surface); }
.hpg-desk__zone-label { margin: 0 0 8px; font-family: var(--hpg-mono); font-size: .72rem; text-transform: uppercase; letter-spacing: .07em; color: var(--hpg-muted); }
.hpg-desk__zone-empty, .hpg-desk__empty { margin: 0; font-size: .87rem; color: var(--hpg-muted); }
.hpg-desk__h { font-size: .95rem; margin-bottom: 10px; }
.hpg-desk__ergonomic, .hpg-desk__bundle { padding: 16px 18px; border: 1px solid var(--hpg-line); border-radius: var(--hpg-radius-sm); background: var(--hpg-bg); }
.hpg-desk__bundle-intro { margin: 0 0 10px; font-size: .9rem; color: var(--hpg-muted); }
.hpg-desk__placed { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border: 1px solid var(--hpg-line); border-radius: 8px; background: var(--hpg-bg); }
.hpg-desk__remove { margin-left: auto; border: 0; background: none; color: var(--hpg-muted); cursor: pointer; font-size: 1.1rem; }

/* Trackers */
.hpg-tracker__summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 12px; }
.hpg-tracker__stat { text-align: center; padding: 14px; border: 1px solid var(--hpg-line); border-radius: var(--hpg-radius-sm); background: var(--hpg-bg); }
.hpg-tracker__entries, .hpg-portfolio__list-wrap { display: grid; gap: 10px; }
.hpg-tracker__row, .hpg-portfolio__card { padding: 14px 16px; border: 1px solid var(--hpg-line); border-radius: var(--hpg-radius-sm); background: var(--hpg-bg); }
.hpg-tracker__meta, .hpg-portfolio__notes { font-size: .85rem; color: var(--hpg-muted); }
.hpg-tracker__delete { border: 0; background: none; color: var(--hpg-muted); cursor: pointer; }
.hpg-portfolio__checks, .hpg-form__field--checks { display: grid; gap: 9px; }
.hpg-portfolio__check, .hpg-form__field--checks label { display: flex; align-items: flex-start; gap: 9px; font-size: .92rem; cursor: pointer; }
.hpg-portfolio__scorebar { height: 8px; border-radius: 999px; background: var(--hpg-surface-2); overflow: hidden; }
.hpg-portfolio__scorebar > * { display: block; height: 100%; background: var(--hpg-accent); border-radius: 999px; }
.hpg-portfolio__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }

/* Time calculator, setup generator, priority finder, project generator */
.hpg-time-calc__grid, .hpg-setup__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; }
.hpg-time-calc__duration { font-size: 1.6rem; font-weight: 700; color: var(--hpg-ink); }
.hpg-time-calc__hint { font-size: .85rem; color: var(--hpg-muted); }
.hpg-time-calc__phase, .hpg-setup__card { padding: 14px 16px; border: 1px solid var(--hpg-line); border-radius: var(--hpg-radius-sm); background: var(--hpg-bg); }
.hpg-setup__why { font-size: .86rem; color: var(--hpg-muted); }
.hpg-priority__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.hpg-priority__item { display: flex; gap: 14px; padding: 14px 16px; border: 1px solid var(--hpg-line); border-radius: var(--hpg-radius-sm); background: var(--hpg-bg); }
.hpg-priority__rank { font-family: var(--hpg-mono); font-weight: 700; color: var(--hpg-accent); }
.hpg-project__readme, .hpg-conceptdb__example {
	background: var(--hpg-code-bg); color: var(--hpg-code-ink);
	border-radius: var(--hpg-radius-sm); padding: 16px;
	font-family: var(--hpg-mono); font-size: .84rem; overflow-x: auto; white-space: pre-wrap;
}
.hpg-project__brief, .hpg-project__result, .hpg-setup__result, .hpg-priority__result, .hpg-time-calc__result, .hpg-debug__result {
	margin-top: 18px; padding: 18px 20px;
	border: 1px solid var(--hpg-line); border-left: 3px solid var(--hpg-accent);
	border-radius: var(--hpg-radius-sm); background: var(--hpg-surface);
}
.hpg-project__ctas, .hpg-project__actions, .hpg-debug__actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 14px; }

/* Debug checklist */
.hpg-debug__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.hpg-debug__row { display: flex; align-items: flex-start; gap: 10px; padding: 12px 14px; border: 1px solid var(--hpg-line); border-radius: var(--hpg-radius-sm); background: var(--hpg-bg); }
.hpg-debug__check { margin-top: 3px; }

/* Product boxes rendered by the tools */
.hpg-product { border: 1px solid var(--hpg-line); border-radius: var(--hpg-radius); padding: 18px; background: var(--hpg-bg); }
.hpg-product__disclosure { font-size: .8rem; color: var(--hpg-muted); margin-top: 10px; }

/* Shared empty state */
.hpg-toolroot .is-empty { padding: 26px; text-align: center; color: var(--hpg-muted); border: 1px dashed var(--hpg-line-strong); border-radius: var(--hpg-radius-sm); }

/* Remaining harvested classes */
.hpg-tracker__actions { display: flex; flex-wrap: wrap; gap: 9px; align-items: center; }
.hpg-time-calc__form { display: grid; gap: 16px; }
.hpg-langdb__head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; margin-bottom: 8px; }
.hpg-conceptdb__name { font-weight: 650; color: var(--hpg-ink); }
.hpg-desk__placed-head { display: flex; align-items: center; gap: 8px; }
.hpg-desk__placed-actions { display: flex; gap: 6px; margin-left: auto; }
.hpg-desk__placed-tip { font-size: .82rem; color: var(--hpg-muted); }
.hpg-desk__move { border: 1px solid var(--hpg-line); background: var(--hpg-bg); border-radius: 6px; cursor: pointer; padding: 2px 7px; }
.hpg-desk__bundle-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.hpg-portfolio__head { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.hpg-portfolio__actions, .hpg-portfolio__links { display: flex; flex-wrap: wrap; gap: 8px; }
.hpg-portfolio__score { font-family: var(--hpg-mono); font-size: .8rem; color: var(--hpg-muted); }
.hpg-tracker__list, .hpg-tracker__concepts { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.hpg-tracker__notes { font-size: .88rem; }
.hpg-conceptdb__list-wrap, .hpg-langdb__grid-wrap, .hpg-desk__palette { display: block; }

.hpg-compare-drawer {
	position: fixed; left: 0; right: 0; bottom: 0; z-index: 70;
	background: var(--hpg-bg);
	border-top: 1px solid var(--hpg-line);
	box-shadow: 0 -8px 30px rgba(16, 20, 34, .12);
	padding: 14px 20px;
	transform: translateY(110%);
	transition: transform .22s ease;
}
.hpg-compare-drawer.is-open { transform: none; }

.hpg-mobile-cta {
	position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 65;
	display: none; align-items: center; justify-content: center;
	padding: 14px; border-radius: 12px;
	background: var(--hpg-accent); color: #fff;
	font-weight: 650; text-decoration: none;
	box-shadow: var(--hpg-shadow-lg);
}
.hpg-mobile-cta.is-on { display: flex; }
@media (min-width: 861px) { .hpg-mobile-cta { display: none !important; } }

.is-picked { border-color: var(--hpg-accent) !important; box-shadow: 0 0 0 3px var(--hpg-accent-soft); }

/* 12. Comments, footer, responsive -------------------------------------- */

.hpg-comments { padding: 40px 0 10px; border-top: 1px solid var(--hpg-line); }
.hpg-comments__title { font-size: 1.3rem; margin-bottom: 18px; }
.hpg-comments__list { list-style: none; margin: 0 0 30px; padding: 0; display: grid; gap: 18px; }
.hpg-comments__list .children { list-style: none; margin: 16px 0 0 22px; padding: 0; display: grid; gap: 16px; }
.hpg-comments .comment-body { padding: 16px 18px; border: 1px solid var(--hpg-line); border-radius: var(--hpg-radius-sm); background: var(--hpg-surface); }
.hpg-comments input[type="text"], .hpg-comments input[type="email"], .hpg-comments input[type="url"], .hpg-comments textarea {
	width: 100%; padding: 11px 14px; font: inherit;
	color: var(--hpg-ink); background: var(--hpg-bg);
	border: 1px solid var(--hpg-line-strong); border-radius: 10px;
}
.hpg-comments .submit { padding: 11px 22px; border: 0; border-radius: 11px; background: var(--hpg-accent); color: #fff; font-weight: 600; cursor: pointer; }

.hpg-footer { background: var(--hpg-surface); border-top: 1px solid var(--hpg-line); padding: 56px 0 30px; margin-top: 0; }
.hpg-footer__top { display: grid; grid-template-columns: 1.5fr repeat(4, 1fr); gap: 34px; }
.hpg-footer__tag { margin: 14px 0 0; font-size: .9rem; color: var(--hpg-muted); max-width: 34ch; }
.hpg-footer__title { font-size: .78rem; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--hpg-ink); margin-bottom: 13px; }
.hpg-footer__col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.hpg-footer__col a { color: var(--hpg-muted); font-size: .91rem; text-decoration: none; }
.hpg-footer__col a:hover { color: var(--hpg-accent-ink); }
.hpg-footer__bottom {
	display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px;
	margin-top: 44px; padding-top: 22px;
	border-top: 1px solid var(--hpg-line);
}
.hpg-footer__copy { margin: 0; font-size: .84rem; color: var(--hpg-muted); max-width: 62ch; }
.hpg-footer__legal-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 18px; }
.hpg-footer__legal-list a { font-size: .84rem; color: var(--hpg-muted); text-decoration: none; }
.hpg-footer__legal-list a:hover { color: var(--hpg-accent-ink); }

@media (max-width: 1080px) {
	.hpg-grid--tools { grid-template-columns: repeat(3, minmax(0, 1fr)); }
	.hpg-footer__top { grid-template-columns: 1fr 1fr 1fr; }
	.hpg-footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 980px) {
	.hpg-hero__inner { grid-template-columns: 1fr; }
	.hpg-hero__art { order: -1; max-width: 560px; }
	.hpg-split { grid-template-columns: 1fr; }
	.hpg-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.hpg-cta-card { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
	body { font-size: 16.5px; }
	.hpg-burger { display: grid; }
	.hpg-header__cta { display: none; }

	.hpg-menu {
		position: fixed; inset: 66px 0 auto;
		max-height: calc(100dvh - 66px);
		overflow-y: auto;
		background: var(--hpg-bg);
		border-bottom: 1px solid var(--hpg-line);
		box-shadow: var(--hpg-shadow-lg);
		padding: 14px 20px 26px;
		display: none;
	}
	.hpg-menu.is-open { display: block; }
	.hpg-menu__list { flex-direction: column; align-items: stretch; gap: 2px; }
	.hpg-menu__link { width: 100%; justify-content: flex-start; padding: 13px 12px; font-size: 1rem; }
	.hpg-menu__toggle { justify-content: space-between; }
	.hpg-menu__panel {
		position: static; opacity: 1; visibility: visible; transform: none;
		border: 0; box-shadow: none; padding: 0 0 6px 12px; min-width: 0;
		display: none; background: none;
	}
	.hpg-menu__panel.is-open { display: block; }
	.hpg-grid--3, .hpg-grid--topics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.hpg-grid--tools { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.hpg-result { grid-template-columns: 1fr; }
	.hpg-result__media { max-width: 320px; }
}

@media (max-width: 620px) {
	:root { --hpg-step: 46px; }
	.hpg-header__inner { gap: 10px; }
	.hpg-brand { flex: 0 1 auto; min-width: 0; }
	.hpg-brand__name { font-size: .95rem; overflow: hidden; text-overflow: ellipsis; }
	.hpg-header__actions { gap: 6px; }
	.hpg-iconbtn { width: 36px; height: 36px; }
	.hpg-wrap { padding-inline: 16px; }
	.hpg-grid--3, .hpg-grid--topics, .hpg-grid--tools, .hpg-steps { grid-template-columns: 1fr; }
	.hpg-footer__top { grid-template-columns: 1fr 1fr; gap: 26px; }
	.hpg-section__head { flex-direction: column; align-items: flex-start; }
	.hpg-section__more { margin-inline-start: 0; }
	.hpg-hero__cta .hpg-btn { flex: 1 1 100%; }
	.hpg-window__badge { right: 8px; bottom: -14px; }
	.hpg-searchform { flex-wrap: wrap; }
	.hpg-searchform__submit { flex: 1; }
	.hpg-article__meta { font-size: .8rem; }
	.hpg-nextcard { flex-wrap: wrap; }
	.hpg-code pre { font-size: .81rem; padding: 15px; }
	.hpg-prose { font-size: 1.02rem; }
}

@media print {
	.hpg-header, .hpg-footer, .hpg-toc, .hpg-nextcard, .hpg-section--cta, .hpg-mobile-cta { display: none !important; }
	body { font-size: 12pt; color: #000; }
}

@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	*, *::before, *::after {
		animation-duration: .001ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: .001ms !important;
	}
}