/* Токены */
:root {
	--color-bg: #f7f7f5;
	--color-surface: #ffffff;
	--color-text: #1d1d1f;
	--color-muted: #5f5f66;
	--color-line: #dcdcd8;
	--color-accent: #2f6299;
	--color-accent-soft: #e8eff7;
	--color-note: #fff4e0;
	--color-focus: #f0a500;
	--color-screen: #1f2733;
	--color-a: #2f6299;
	--color-b: #c2410c;

	--font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
	--font-size: 1.0625rem;
	--line-height: 1.6;

	--space-xs: 0.25rem;
	--space-s: 0.5rem;
	--space-m: 1rem;
	--space-l: 1.5rem;
	--space-xl: 2.5rem;

	--radius-s: 0.375rem;
	--radius-m: 0.875rem;
	--container: 58rem;
	--gutter: 1rem;
}

@media (prefers-color-scheme: dark) {
	:root {
		--color-bg: #121214;
		--color-surface: #1b1b1e;
		--color-text: #ececee;
		--color-muted: #a3a3ab;
		--color-line: #2e2e33;
		--color-accent: #8bb8ea;
		--color-accent-soft: #1f2a36;
		--color-note: #3a2e17;
		--color-screen: #0b0e13;
		--color-a: #8bb8ea;
		--color-b: #fb923c;
	}
}

/* База */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
	margin: 0;
	background: var(--color-bg);
	color: var(--color-text);
	font: var(--font-size)/var(--line-height) var(--font-base);
}
a { color: var(--color-accent); text-underline-offset: 0.15em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; border-radius: 2px; }
h1, h2, h3 { line-height: 1.25; }
[hidden] { display: none !important; }
@media (prefers-reduced-motion: reduce) {
	* { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

/* container */
.container { max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }

/* skip-link */
.skip-link {
	position: absolute; left: var(--gutter); top: -3rem; z-index: 10;
	padding: var(--space-s) var(--space-m);
	background: var(--color-surface); color: var(--color-text);
	border-radius: var(--radius-s);
}
.skip-link:focus { top: var(--space-s); }

/* site-header */
.site-header { background: var(--color-surface); border-bottom: 1px solid var(--color-line); }
.site-header__inner {
	display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
	gap: var(--space-s) var(--space-l); padding-block: var(--space-m);
}

/* logo */
.logo { font-weight: 700; font-size: 1.2rem; color: var(--color-text); text-decoration: none; }
.logo__accent { color: var(--color-accent); }

/* nav */
.nav__list { display: flex; flex-wrap: wrap; gap: var(--space-xs) var(--space-l); margin: 0; padding: 0; list-style: none; }
.nav__link { display: inline-block; padding-block: var(--space-xs); color: var(--color-muted); text-decoration: none; font-size: 0.95rem; }
.nav__link:hover { color: var(--color-text); }
.nav__link--current { color: var(--color-text); font-weight: 600; box-shadow: inset 0 -2px 0 var(--color-accent); }

/* page */
.page { padding-block: var(--space-xl); }

/* hero */
.hero__title { font-size: clamp(1.6rem, 4vw + 0.5rem, 2.1rem); margin: 0 0 var(--space-m); }
.hero__lead { font-size: 1.15rem; color: var(--color-muted); margin: 0 0 var(--space-l); }

/* section */
.section { margin-top: var(--space-xl); }
.section__title { font-size: 1.45rem; margin: 0 0 var(--space-m); }
.section__text { margin: 0 0 var(--space-m); }

/* cards */
.cards {
	display: grid; grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
	gap: var(--space-m); margin: 0; padding: 0; list-style: none;
}

/* card */
.card {
	height: 100%; padding: var(--space-m) var(--space-l);
	background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius-m);
}
.card__year { display: block; font-size: 0.875rem; color: var(--color-muted); }
.card__title { font-size: 1.15rem; margin: 0 0 var(--space-s); }
.card__link { color: inherit; }
.card__text { margin: 0; }
.card__list { margin: 0; padding-left: 1.2rem; }
.card__tags { display: flex; flex-wrap: wrap; gap: var(--space-xs); margin: var(--space-s) 0 0; padding: 0; list-style: none; }

/* tag */
.tag { padding: 0 var(--space-s); border-radius: var(--radius-s); background: var(--color-accent-soft); font-size: 0.85rem; }

/* spec-table */
.spec-table {
	overflow-x: auto; background: var(--color-surface);
	border: 1px solid var(--color-line); border-radius: var(--radius-m);
}
.spec-table__table { width: 100%; min-width: 48rem; border-collapse: collapse; font-size: 0.95rem; }
.spec-table__caption { padding: var(--space-m); text-align: left; font-weight: 600; }
.spec-table__head, .spec-table__cell {
	padding: 0.6rem 0.6rem; text-align: left; vertical-align: baseline;
	border-top: 1px solid var(--color-line); white-space: nowrap;
}
.spec-table__head { font-weight: 600; background: var(--color-accent-soft); }
.spec-table__head--row { background: none; white-space: normal; min-width: 7rem; }
.spec-table__cell--wide { white-space: normal; min-width: 8rem; }

/* timeline */
.timeline { margin: 0; padding: 0; list-style: none; border-left: 2px solid var(--color-line); }
.timeline__item { position: relative; padding: 0 0 var(--space-m) var(--space-l); }
.timeline__item::before {
	content: ""; position: absolute; left: -0.45rem; top: 0.45rem;
	width: 0.75rem; height: 0.75rem; border-radius: 50%; background: var(--color-accent);
}
.timeline__item--rumor::before { background: var(--color-surface); border: 2px solid var(--color-muted); }
.timeline__date { display: block; font-size: 0.875rem; color: var(--color-muted); }
.timeline__label { font-weight: 600; color: var(--color-muted); }

/* note */
.note { margin: 0; padding: var(--space-m) var(--space-l); border-radius: var(--radius-m); background: var(--color-note); }

/* silhouette: контур устройства, рисуется site.js */
.silhouette { display: block; width: 100%; height: auto; overflow: visible; }
.silhouette__body { fill: var(--color-surface); stroke: var(--color-text); stroke-width: 1.5px; vector-effect: non-scaling-stroke; }
.silhouette__screen { fill: var(--color-screen); }
.silhouette__button { fill: none; stroke: var(--color-muted); stroke-width: 1.2px; vector-effect: non-scaling-stroke; }
.silhouette__ring { fill: none; stroke: var(--color-accent); stroke-width: 1.2px; vector-effect: non-scaling-stroke; }
.silhouette__key { fill: var(--color-text); }
.silhouette__camera { fill: var(--color-muted); }
.silhouette--a .silhouette__body, .silhouette--b .silhouette__body,
.silhouette--a .silhouette__screen, .silhouette--b .silhouette__screen { fill: none; stroke-width: 2px; vector-effect: non-scaling-stroke; }
.silhouette--a .silhouette__body, .silhouette--a .silhouette__screen { stroke: var(--color-a); }
.silhouette--b .silhouette__body, .silhouette--b .silhouette__screen { stroke: var(--color-b); stroke-dasharray: 6 4; }
.silhouette--a :is(.silhouette__button, .silhouette__ring, .silhouette__key, .silhouette__camera) { display: none; }
.silhouette--b :is(.silhouette__button, .silhouette__ring, .silhouette__key, .silhouette__camera) { display: none; }
.silhouette--leaving { position: absolute; inset: 0; opacity: 0; transition: opacity 0.4s ease; }

/* card: силуэт в карточке поколения */
.card__figure { width: 4.5rem; margin: 0 0 var(--space-s); }

/* roadmap: хронология и силуэт, который следует за ней */
.roadmap { display: grid; gap: var(--space-xl); }
.roadmap__figure { display: none; }
@media (min-width: 50rem) {
	.roadmap { grid-template-columns: 1fr 12rem; align-items: start; }
	.js .roadmap__figure { display: block; position: sticky; top: var(--space-xl); }
}
.roadmap__stage { position: relative; }
.roadmap__stage > .silhouette { animation: silhouette-in 0.4s ease; }
@keyframes silhouette-in { from { opacity: 0; } to { opacity: 1; } }
.roadmap__caption { margin: var(--space-s) 0 0; color: var(--color-muted); font-size: 0.9rem; text-align: center; }
.timeline__item--active::before { box-shadow: 0 0 0 4px var(--color-accent-soft); }

/* compare: сравнение двух моделей */
.compare { margin: 0 0 var(--space-xl); padding: var(--space-l); background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius-m); }
.compare__title { font-size: 1.25rem; margin: 0 0 var(--space-m); }
.compare__controls { display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: var(--space-m); }
.compare__field { display: grid; gap: var(--space-xs); font-weight: 600; }
.compare__select { font: inherit; font-weight: 400; padding: var(--space-s); border: 1px solid var(--color-line); border-radius: var(--radius-s); background: var(--color-bg); color: var(--color-text); }
.compare__field--a .compare__swatch { background: var(--color-a); }
.compare__field--b .compare__swatch { background: var(--color-b); }
.compare__swatch { display: inline-block; width: 0.75rem; height: 0.75rem; margin-right: var(--space-xs); border-radius: 50%; }
.compare__summary { margin: var(--space-m) 0; color: var(--color-muted); }
.compare__body { display: grid; gap: var(--space-l); }
@media (min-width: 45rem) { .compare__body { grid-template-columns: 1fr 10rem; align-items: start; } }
.compare__list { margin: 0; }
.compare__row { display: grid; grid-template-columns: 9rem 1fr 1fr; gap: var(--space-s); padding: var(--space-s) 0; border-top: 1px solid var(--color-line); }
.compare__row--diff { background: var(--color-accent-soft); }
.compare__row--diff .compare__param { font-weight: 600; }
.compare__param { color: var(--color-muted); padding-left: var(--space-s); }
.compare__value { margin: 0; }
.compare__stack { display: grid; max-width: 10rem; margin-inline: auto; }
.compare__stack > .silhouette { grid-area: 1 / 1; }
@media (max-width: 35rem) { .compare__row { grid-template-columns: 1fr 1fr; } .compare__param { grid-column: 1 / -1; padding-left: 0; } }

/* size: примерка в реальном размере */
.size { display: grid; gap: var(--space-l); }
.size__step { min-width: 0; overflow: hidden; padding: var(--space-l); background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius-m); }
.size__title { font-size: 1.15rem; margin: 0 0 var(--space-s); }
.size__text { margin: 0 0 var(--space-m); }
.size__range { width: 100%; max-width: 30rem; accent-color: var(--color-accent); }
.size__card { margin-top: var(--space-m); border: 2px dashed var(--color-accent); border-radius: 3mm; }
.size__picker { display: grid; gap: var(--space-xs); margin: 0 0 var(--space-m); padding: 0; border: 0; }
.size__legend { font-weight: 600; margin-bottom: var(--space-s); padding: 0; }
.size__option { display: flex; gap: var(--space-s); align-items: center; }
.size__radio, .size__checkbox { accent-color: var(--color-accent); width: 1.1rem; height: 1.1rem; }
.size__stage { position: relative; overflow: hidden; }
.size__stage > .silhouette { position: absolute; top: 0; left: 0; }
.size__stage--landscape > .silhouette { transform-origin: top left; transform: rotate(-90deg) translateX(-100%); }
.size__label { margin: var(--space-m) 0 0; color: var(--color-muted); }

/* facts: «а вы знали» */
.facts__item { border-left: 3px solid var(--color-accent); }

/* reveal: плавное появление, только при включённом JS */
.js .reveal { opacity: 0; transform: translateY(0.75rem); transition: opacity 0.5s ease, transform 0.5s ease; }
.js .reveal--visible { opacity: 1; transform: none; }

/* noscript */
.noscript { margin: 0 0 var(--space-l); padding: var(--space-m); border-radius: var(--radius-m); background: var(--color-note); }

/* site-footer */
.site-footer { border-top: 1px solid var(--color-line); color: var(--color-muted); font-size: 0.9rem; }
.site-footer__inner { padding-block: var(--space-l); }
.site-footer__text { margin: var(--space-xs) 0; }

@media (max-width: 35rem) {
	.site-header__inner { flex-direction: column; align-items: flex-start; }
	.hero__lead { font-size: 1.05rem; }
	.card { padding: var(--space-m); }
}