/* ============================================================
   selfdevapp.ru — дизайн-система v3
   Стекло, градиентные пятна, крупные скругления, тёмная/светлая тема
   Без внешних зависимостей и без color-mix()
   ============================================================ */

:root {
	--bg: #06070c;
	--surface: rgba(255, 255, 255, .05);
	--surface-2: rgba(255, 255, 255, .07);
	--surface-solid: #11151f;
	--text: #eef2f8;
	--text-soft: #c3cddf;
	--muted: #8b97ae;
	--border: rgba(255, 255, 255, .10);
	--border-strong: rgba(255, 255, 255, .18);
	--accent: #6a8dff;
	--accent-2: #a86bff;
	--accent-soft: rgba(106, 141, 255, .16);
	--success: #3ad29f;
	--glass: rgba(10, 12, 20, .62);
	--orb-1: rgba(106, 141, 255, .38);
	--orb-2: rgba(168, 107, 255, .32);
	--orb-3: rgba(58, 210, 159, .16);
	--radius: 26px;
	--radius-sm: 14px;
	--shadow: 0 26px 70px rgba(0, 0, 0, .55);
	--glow: 0 18px 46px rgba(106, 141, 255, .30);
	--max: 1120px;
}

@media (prefers-color-scheme: light) {
	:root:not([data-theme="dark"]) {
		--bg: #f6f8fd;
		--surface: rgba(255, 255, 255, .66);
		--surface-2: rgba(255, 255, 255, .82);
		--surface-solid: #ffffff;
		--text: #0f1420;
		--text-soft: #39425a;
		--muted: #5f6b83;
		--border: rgba(15, 20, 32, .10);
		--border-strong: rgba(15, 20, 32, .16);
		--accent-soft: rgba(106, 141, 255, .12);
		--glass: rgba(255, 255, 255, .72);
		--orb-1: rgba(106, 141, 255, .26);
		--orb-2: rgba(168, 107, 255, .20);
		--orb-3: rgba(58, 210, 159, .14);
		--shadow: 0 26px 70px rgba(15, 20, 32, .14);
		--glow: 0 18px 46px rgba(106, 141, 255, .22);
	}
}

:root[data-theme="light"] {
	--bg: #f6f8fd;
	--surface: rgba(255, 255, 255, .66);
	--surface-2: rgba(255, 255, 255, .82);
	--surface-solid: #ffffff;
	--text: #0f1420;
	--text-soft: #39425a;
	--muted: #5f6b83;
	--border: rgba(15, 20, 32, .10);
	--border-strong: rgba(15, 20, 32, .16);
	--accent-soft: rgba(106, 141, 255, .12);
	--glass: rgba(255, 255, 255, .72);
	--orb-1: rgba(106, 141, 255, .26);
	--orb-2: rgba(168, 107, 255, .20);
	--orb-3: rgba(58, 210, 159, .14);
	--shadow: 0 26px 70px rgba(15, 20, 32, .14);
	--glow: 0 18px 46px rgba(106, 141, 255, .22);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
	position: relative;
	margin: 0;
	min-height: 100%;
	overflow-x: hidden;
	color: var(--text);
	font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Ubuntu, "Helvetica Neue", sans-serif;
	-webkit-font-smoothing: antialiased;
	background: var(--bg);
}

/* градиентные пятна на фоне */
body::before {
	content: "";
	position: fixed;
	inset: -25%;
	z-index: -1;
	pointer-events: none;
	background:
		radial-gradient(38% 38% at 16% 10%, var(--orb-1), transparent 70%),
		radial-gradient(34% 34% at 84% 6%, var(--orb-2), transparent 70%),
		radial-gradient(32% 32% at 62% 88%, var(--orb-3), transparent 70%);
	filter: blur(30px);
	animation: drift 30s ease-in-out infinite alternate;
}

@keyframes drift {
	from { transform: translate3d(-2%, -1%, 0) scale(1); }
	to { transform: translate3d(3%, 2%, 0) scale(1.08); }
}

a { color: var(--accent); text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 22px; }

:focus-visible {
	outline: 2px solid var(--accent);
	outline-offset: 3px;
	border-radius: 8px;
}

/* ---------- шапка ---------- */

.top {
	position: sticky;
	top: 0;
	z-index: 40;
	background: var(--glass);
	-webkit-backdrop-filter: blur(18px) saturate(140%);
	backdrop-filter: blur(18px) saturate(140%);
	border-bottom: 1px solid var(--border);
}

.top-in {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 16px;
	min-height: 66px;
}

.logo {
	display: inline-flex;
	align-items: center;
	gap: 11px;
	font-weight: 650;
	font-size: 17px;
	letter-spacing: -.01em;
	color: var(--text);
}

.logo-mark {
	width: 34px;
	height: 34px;
	border-radius: 11px;
	display: grid;
	place-items: center;
	font-size: 15px;
	font-weight: 700;
	color: #fff;
	background: linear-gradient(140deg, var(--accent), var(--accent-2));
	box-shadow: 0 8px 22px rgba(106, 141, 255, .40);
}

.top-right { display: flex; align-items: center; gap: 14px; }

.nav { display: flex; align-items: center; gap: 20px; font-size: 15px; }
.nav a { color: var(--muted); transition: color .15s ease; }
.nav a:hover, .nav a.active { color: var(--text); }

.theme {
	width: 38px;
	height: 38px;
	display: grid;
	place-items: center;
	border: 1px solid var(--border-strong);
	border-radius: 12px;
	background: var(--surface);
	color: var(--muted);
	cursor: pointer;
	transition: color .16s ease, border-color .16s ease, transform .16s ease;
}

.theme:hover { color: var(--text); border-color: var(--accent); transform: translateY(-1px); }
.theme svg { width: 18px; height: 18px; }
.theme .i-moon { display: none; }
.theme[data-current="light"] .i-sun { display: none; }
.theme[data-current="light"] .i-moon { display: block; }

/* ---------- герой ---------- */

.hero { padding: 90px 0 40px; max-width: 820px; }

.eyebrow {
	display: inline-flex;
	align-items: center;
	gap: 9px;
	margin-bottom: 24px;
	padding: 8px 15px;
	border: 1px solid var(--border-strong);
	border-radius: 999px;
	background: var(--surface);
	-webkit-backdrop-filter: blur(10px);
	backdrop-filter: blur(10px);
	color: var(--muted);
	font-size: 13.5px;
}

.dot {
	width: 7px;
	height: 7px;
	border-radius: 50%;
	background: var(--success);
	box-shadow: 0 0 0 4px rgba(58, 210, 159, .18);
}

.hero h1 {
	margin: 0 0 20px;
	font-size: clamp(34px, 6.2vw, 58px);
	line-height: 1.06;
	letter-spacing: -.032em;
	font-weight: 700;
}

.grad {
	background: linear-gradient(100deg, var(--accent), var(--accent-2));
	-webkit-background-clip: text;
	background-clip: text;
	color: transparent;
}

.hero p {
	margin: 0 0 32px;
	max-width: 640px;
	color: var(--muted);
	font-size: clamp(16px, 2.2vw, 18.5px);
}

.cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

/* ---------- кнопки ---------- */

.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 9px;
	padding: 13px 24px;
	border: 1px solid transparent;
	border-radius: 999px;
	font-size: 15px;
	font-weight: 600;
	color: #fff;
	cursor: pointer;
	background: linear-gradient(120deg, var(--accent), var(--accent-2));
	box-shadow: var(--glow);
	transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
}

.btn:hover { transform: translateY(-2px); filter: brightness(1.07); }
.btn:active { transform: translateY(0); }

.btn-line {
	background: var(--surface);
	border-color: var(--border-strong);
	color: var(--text);
	box-shadow: none;
	-webkit-backdrop-filter: blur(10px);
	backdrop-filter: blur(10px);
}

.btn-line:hover { border-color: var(--accent); color: var(--accent); }

.btn[aria-disabled="true"] {
	background: var(--surface-2);
	color: var(--muted);
	box-shadow: none;
	cursor: default;
	pointer-events: none;
	border-color: var(--border);
}

.btn-sm { padding: 9px 17px; font-size: 14px; }

.arrow { transition: transform .18s ease; }
.btn:hover .arrow, .doc:hover .arrow { transform: translateX(3px); }

/* ---------- секции ---------- */

.sec-head {
	display: flex;
	align-items: baseline;
	justify-content: space-between;
	gap: 16px;
	margin: 64px 0 22px;
}

.sec-head h2 { margin: 0; font-size: clamp(22px, 3.4vw, 30px); letter-spacing: -.02em; }
.sec-head .more { color: var(--muted); font-size: 15px; }
.sec-head .more:hover { color: var(--accent); }

/* ---------- карточки приложений ---------- */

.grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
	gap: 18px;
}

.card {
	position: relative;
	display: flex;
	flex-direction: column;
	gap: 16px;
	padding: 24px;
	border: 1px solid var(--border);
	border-radius: var(--radius);
	background: var(--surface);
	-webkit-backdrop-filter: blur(16px);
	backdrop-filter: blur(16px);
	overflow: hidden;
	transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}

.card::before {
	content: "";
	position: absolute;
	inset: 0 0 auto 0;
	height: 1px;
	background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
}

.card::after {
	content: "";
	position: absolute;
	top: 0;
	left: -45%;
	width: 45%;
	height: 100%;
	pointer-events: none;
	opacity: 0;
	background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .10), transparent);
	transform: skewX(-18deg);
}

.card:hover {
	transform: translateY(-4px);
	border-color: var(--border-strong);
	box-shadow: var(--shadow);
}

.card:hover::after { opacity: 1; animation: shine .95s ease; }

@keyframes shine {
	from { left: -45%; }
	to { left: 125%; }
}

.card-head { display: flex; gap: 16px; align-items: center; }

.icon {
	flex: 0 0 auto;
	width: 64px;
	height: 64px;
	border-radius: 19px;
	overflow: hidden;
	display: grid;
	place-items: center;
	font-size: 24px;
	font-weight: 700;
	color: #fff;
	background: linear-gradient(140deg, var(--accent), var(--accent-2));
	box-shadow: 0 12px 28px rgba(0, 0, 0, .38);
	transition: transform .25s ease;
}

.card:hover .icon { transform: scale(1.04) rotate(-2deg); }
.icon img { width: 100%; height: 100%; object-fit: cover; }

.card h3 { margin: 0; font-size: 19px; letter-spacing: -.012em; }
.card h3 a { color: var(--text); }
.card h3 a:hover { color: var(--accent); }

.tagline { margin: 3px 0 0; color: var(--muted); font-size: 14.5px; }
.desc { margin: 0; color: var(--text-soft); font-size: 15px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
	padding: 5px 12px;
	border: 1px solid var(--border);
	border-radius: 999px;
	background: var(--surface-2);
	color: var(--muted);
	font-size: 12.5px;
	white-space: nowrap;
}

.actions { margin-top: auto; display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

.link-quiet { color: var(--muted); font-size: 14px; }
.link-quiet:hover { color: var(--accent); }

/* ---------- избранное приложение ---------- */

.feature {
	display: grid;
	grid-template-columns: auto 1fr;
	gap: 30px;
	align-items: center;
	padding: 34px;
	border: 1px solid var(--border-strong);
	border-radius: var(--radius);
	background: linear-gradient(150deg, var(--accent-soft), transparent 58%), var(--surface);
	-webkit-backdrop-filter: blur(18px);
	backdrop-filter: blur(18px);
	box-shadow: var(--shadow);
}

.feature .icon { width: 112px; height: 112px; border-radius: 28px; font-size: 40px; }
.feature h2 { margin: 0 0 8px; font-size: clamp(24px, 3.8vw, 34px); letter-spacing: -.022em; }
.feature .tagline { font-size: 17px; margin-bottom: 16px; }
.feature .desc { max-width: 640px; margin-bottom: 22px; }

/* ---------- плитки на лендинге ---------- */

.tiles {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
	gap: 14px;
	margin-top: 20px;
}

.tile {
	display: flex;
	flex-direction: column;
	gap: 4px;
	padding: 20px;
	border: 1px solid var(--border);
	border-radius: var(--radius-sm);
	background: var(--surface);
	-webkit-backdrop-filter: blur(14px);
	backdrop-filter: blur(14px);
	transition: border-color .18s ease, transform .18s ease;
}

.tile:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.tile-ico { font-size: 20px; margin-bottom: 2px; }
.tile strong { font-size: 15.5px; letter-spacing: -.01em; }
.tile span { color: var(--muted); font-size: 14px; }

/* ---------- страница приложения ---------- */

.crumbs { padding: 28px 0 0; color: var(--muted); font-size: 14.5px; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--accent); }
.crumbs span { margin: 0 8px; opacity: .5; }

.app-top { display: flex; flex-wrap: wrap; gap: 26px; align-items: center; padding: 34px 0 12px; }
.app-top .icon { width: 104px; height: 104px; border-radius: 26px; font-size: 36px; }
.app-top h1 { margin: 0 0 8px; font-size: clamp(27px, 4.6vw, 40px); letter-spacing: -.028em; }
.app-top .tagline { font-size: 17.5px; margin-bottom: 16px; }

.panel {
	margin: 22px 0;
	padding: 26px;
	border: 1px solid var(--border);
	border-radius: var(--radius);
	background: var(--surface);
	-webkit-backdrop-filter: blur(16px);
	backdrop-filter: blur(16px);
}

.panel h2 { margin: 0 0 14px; font-size: 20px; letter-spacing: -.012em; }
.panel p { color: var(--text-soft); }
.panel p:last-child { margin-bottom: 0; }
.panel ul { margin: 0; padding-left: 20px; color: var(--text-soft); }
.panel li { margin: 7px 0; }

/* ---------- галерея скриншотов в макете телефона ---------- */

.gallery {
	display: flex;
	gap: 18px;
	overflow-x: auto;
	padding: 6px 4px 16px;
	scroll-snap-type: x mandatory;
	-webkit-overflow-scrolling: touch;
}

.gallery::-webkit-scrollbar { height: 8px; }
.gallery::-webkit-scrollbar-track { background: var(--surface-2); border-radius: 999px; }
.gallery::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 999px; }

.phone {
	flex: 0 0 auto;
	width: 212px;
	padding: 9px;
	border-radius: 32px;
	scroll-snap-align: start;
	border: 1px solid var(--border-strong);
	background: linear-gradient(160deg, rgba(255, 255, 255, .16), rgba(255, 255, 255, .03));
	box-shadow: var(--shadow);
	transition: transform .25s ease;
}

.phone:hover { transform: translateY(-4px); }

.phone-scr {
	position: relative;
	aspect-ratio: 9 / 16;
	border-radius: 24px;
	overflow: hidden;
	display: grid;
	place-items: center;
	padding: 12px;
	background: var(--surface-2);
	color: var(--muted);
	font-size: 13px;
	text-align: center;
}

.phone-scr::before {
	content: "";
	position: absolute;
	top: 9px;
	left: 50%;
	transform: translateX(-50%);
	width: 54px;
	height: 6px;
	border-radius: 999px;
	background: rgba(150, 160, 180, .35);
	z-index: 2;
}

.phone img { width: 100%; height: 100%; object-fit: cover; border-radius: 24px; }

.gallery-hint { color: var(--muted); font-size: 13.5px; margin: 0 0 12px; }

/* ---------- документы ---------- */

.docs { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; }

.doc {
	display: block;
	padding: 20px;
	border: 1px solid var(--border);
	border-radius: var(--radius-sm);
	background: var(--surface-2);
	color: var(--text);
	transition: border-color .18s ease, transform .18s ease;
}

.doc:hover { border-color: var(--accent); transform: translateY(-2px); }
.doc strong { display: block; margin-bottom: 5px; font-size: 16px; }
.doc span { color: var(--muted); font-size: 14px; }

/* ---------- ссылки для RuStore ---------- */

.url-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 12px; }

code {
	font: 13.5px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
	padding: 9px 12px;
	border: 1px solid var(--border);
	border-radius: 11px;
	background: var(--surface-2);
	color: var(--text);
	word-break: break-all;
}

.copy {
	padding: 9px 14px;
	border: 1px solid var(--border);
	border-radius: 11px;
	background: var(--surface-2);
	color: var(--muted);
	font-size: 13px;
	cursor: pointer;
	transition: border-color .15s ease, color .15s ease;
}

.copy:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- документы (текст) ---------- */

.prose { max-width: 810px; padding: 20px 0 70px; }
.prose h1 { margin: 22px 0 12px; font-size: clamp(26px, 4.6vw, 36px); letter-spacing: -.028em; }
.prose h2 { margin: 38px 0 10px; font-size: 20px; letter-spacing: -.012em; }
.prose p, .prose li { color: var(--text-soft); }
.prose ul { padding-left: 22px; }
.prose li { margin: 5px 0; }
.prose .meta { color: var(--muted); font-size: 14.5px; }

.note {
	margin: 22px 0;
	padding: 16px 18px;
	border: 1px solid var(--border);
	border-left: 3px solid var(--accent);
	border-radius: var(--radius-sm);
	background: var(--surface);
	color: var(--muted);
	font-size: 14.5px;
}

/* ---------- подвал ---------- */

.foot {
	margin-top: 80px;
	border-top: 1px solid var(--border);
	background: var(--glass);
	-webkit-backdrop-filter: blur(14px);
	backdrop-filter: blur(14px);
}

.foot-in {
	display: flex;
	flex-wrap: wrap;
	gap: 14px;
	justify-content: space-between;
	padding: 28px 0 36px;
	color: var(--muted);
	font-size: 14.5px;
}

.foot-in a { color: var(--muted); }
.foot-in a:hover { color: var(--accent); }
.foot-links { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }

/* ---------- появление ---------- */

@keyframes riseIn {
	from { opacity: 0; transform: translateY(16px); }
	to { opacity: 1; transform: none; }
}

.rise { animation: riseIn .65s cubic-bezier(.2, .7, .2, 1) both; }
.rise-1 { animation-delay: .06s; }
.rise-2 { animation-delay: .13s; }
.rise-3 { animation-delay: .20s; }

@media (prefers-reduced-motion: reduce) {
	body::before { animation: none; }
	.rise { animation: none; }
	.card:hover, .btn:hover, .phone:hover, .icon { transform: none; }
	.card:hover::after { animation: none; opacity: 0; }
}

/* ---------- адаптив ---------- */

@media (max-width: 720px) {
	.hero { padding: 52px 0 32px; }
	.feature { grid-template-columns: 1fr; gap: 22px; padding: 24px; }
	.feature .icon { width: 88px; height: 88px; font-size: 32px; }
	.sec-head { margin-top: 46px; }
	.app-top .icon { width: 80px; height: 80px; border-radius: 22px; font-size: 30px; }
	.panel { padding: 20px; }
	.phone { width: 176px; }
	.nav a { font-size: 14.5px; }
}