/* --- Monochrome High-End (Black & White) --- */
:root {
	--bg: #0a0a0a;
	--bg-2: #0a0a0a;
	--panel: rgba(255,255,255,0.04);
	--panel-2: rgba(255,255,255,0.06);
	--border: rgba(255,255,255,0.12);
	--text: #f0f0f0;
	--muted: #b5b5b5;

	--primary: #ffffff;
	--primary-press: #e6e6e6;

	--radius: 14px;
	--shadow: 0 6px 24px rgba(0,0,0,0.35);
	--shadow-sm: 0 2px 10px rgba(0,0,0,0.25);
	--container: 1200px;

	/* Liquid Glass vars */
	--tint-color: 255,255,255;
	--tint-opacity: 0.11;
	--tint-opacity-active: 0.25;
	--frost-blur: 14px;
	--inner-shadow-color: rgba(255,255,255,0.7);
	--inner-shadow-blur: 6px;
	--inner-shadow-spread: -1px;
	--outer-shadow-blur: 32px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
	margin: 0;
	font-family: ui-sans-serif, -apple-system, Segoe UI, Roboto, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Helvetica, Arial, sans-serif;
	color: var(--text);
	background: var(--bg);
	overflow-x: hidden;
	scroll-behavior: smooth;
}

.aurora { display: none; }
@keyframes float {
	from { transform: translateY(-10px) translateX(-10px) scale(1); }
	to { transform: translateY(20px) translateX(10px) scale(1.05); }
}
@keyframes spin { to { transform: rotate(360deg); } }

.container { width: min(100% - 32px, var(--container)); margin: 0 auto; }
.glass {
	backdrop-filter: blur(10px) saturate(140%);
	background: rgba(255,255,255,.04);
	border: 1px solid var(--border);
}

/* Intro Loader */
#loader {
	position: fixed; inset: 0; z-index: 999;
	background: var(--bg);
	display: grid; place-items: center;
}
.loader-inner { display: grid; gap: 10px; text-align: center; }
.loader-mark { font-weight: 800; letter-spacing: .4px; font-size: clamp(22px, 3vw, 28px); color: var(--text); }
.loader-sub { color: var(--muted); font-size: 12px; letter-spacing: 2px; text-transform: uppercase; }

header { position: sticky; top: 0; z-index: 50; backdrop-filter: none; background: transparent; border: 0 !important; box-shadow: none !important; outline: 0; }
header.glass { background: transparent; border-bottom: 0; isolation: isolate; overflow: hidden; --header-tint: 0; border: 0 !important; box-shadow: none !important; }
header.glass::before, header.glass::after { box-shadow: none !important; border: 0 !important; }
header.glass::before { content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 0; background-color: rgba(var(--tint-color), var(--header-tint)); transition: background-color .35s ease; }
header.glass::after { content: ""; position: absolute; inset: 0; pointer-events: none; z-index: -1; backdrop-filter: blur(var(--frost-blur)) saturate(140%); -webkit-backdrop-filter: blur(var(--frost-blur)) saturate(140%); background: radial-gradient(220px 220px at var(--px,50%) var(--py,50%), rgba(255,255,255,.22), rgba(255,255,255,0) 60%), linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,0) 45%); mix-blend-mode: screen; opacity: 0; transition: opacity .25s ease; }
header.glass.glass-active { --header-tint: var(--tint-opacity); }
header.glass.glass-active::after { opacity: 1; }

.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
	width: 36px; height: 36px; border-radius: 12px;
	box-shadow: var(--shadow-sm);
	position: relative; overflow: hidden;
	background: url('icon.png?v=1') center/contain no-repeat;
	background-color: transparent;
}
.logo img { width: 100%; height: 100%; object-fit: contain; display: block; }
.logo::after { content: none; }
.brand-name { font-weight: 700; letter-spacing: .2px; }

.menu { display: flex; align-items: center; gap: 14px; position: relative; }
/* Liquid slider background under nav links */
.menu .slider-bg {
	position: absolute; top: 50%; left: 0; transform: translateY(-50%);
	height: 40px; width: 0;
	border-radius: 12px;
	z-index: 0; pointer-events: none;
	background-color: rgba(var(--tint-color), var(--tint-opacity));
	box-shadow: inset 0 0 var(--inner-shadow-blur) var(--inner-shadow-spread) var(--inner-shadow-color);
	opacity: 0;
	transition: transform .5s cubic-bezier(.4,1.5,.5,1), width .5s cubic-bezier(.4,0,.5,1), height .5s cubic-bezier(.4,1.5,.5,1), background-color .35s ease, opacity .25s ease;
}
.menu.hovering .slider-bg { opacity: 1; }
.menu .slider-bg.is-squashing { height: 36px; }

.menu a {
	color: var(--muted); text-decoration: none; font-size: 14px; padding: 10px 12px; border-radius: 12px;
	transition: color .2s, background .2s, transform .2s;
	position: relative; z-index: 1;
}
.menu a:hover {
	color: var(--text);
	background: var(--panel);
	transform: translateY(-1px);
}
.menu a.active { color: var(--text); }
.lang-toggle, .menu-toggle, .btn {
	appearance: none; border: 0; outline: 0; cursor: pointer;
	border-radius: 12px; font-weight: 600; font-size: 14px;
}
.lang-toggle {
	color: var(--muted);
	background: transparent;
	padding: 10px 12px;
	box-shadow: none;
	border: 0;
	position: relative;
	z-index: 1;
	transition: color .2s, background .2s, transform .2s;
}
.lang-toggle::after { content: none; }
.lang-toggle:hover {
	color: var(--text);
	background: var(--panel);
	transform: translateY(-1px);
}
.lang-toggle:active {
	background: rgba(255,255,255,0.06);
	transform: translateY(0);
}
.menu-toggle {
	background: transparent; color: var(--text);
	border: 1px solid var(--border); padding: 8px 10px; display: none;
}

/* Hero */
.hero { position: relative; z-index: 1; padding: 96px 0 48px; min-height: 88vh; display: grid; align-content: center; }
.hero::before { background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,0) 50%); }
.badge {
	display: inline-flex; align-items: center; gap: 8px;
	padding: 6px 10px; border-radius: 999px; font-size: 12px; color: var(--text);
	background: rgba(255,255,255,.06);
	border: 1px solid var(--border);
	box-shadow: inset 0 2px 12px rgba(255,255,255,.18);
}
.hero h1 {
	font-size: clamp(40px, 6.4vw, 80px);
	line-height: 1.06; margin: 16px 0;
	color: var(--text);
	font-weight: 800;
	letter-spacing: .4px;
}
.hero .sub {
	color: var(--muted);
	font-size: clamp(15px, 1.4vw, 18px);
	max-width: 780px;
}
.cta { display: flex; gap: 12px; align-items: center; margin-top: 22px; }
.btn {
	background: var(--primary);
	color: #0a0a0a;
	padding: 12px 18px; box-shadow: var(--shadow-sm);
	transition: transform .15s ease, box-shadow .2s ease, opacity .2s ease;
	position: relative; overflow: hidden;
	transform: translateZ(0);
}
.btn::before { content: none; }
.btn:hover {
	transform: translateY(-2px);
	box-shadow: 0 8px 28px rgba(0,0,0,0.4);
}
.btn:active { transform: translateY(0); background: var(--primary-press); }
.btn-ghost {
	background: transparent; color: var(--text);
	border: 1px solid var(--border);
}
.btn-ghost:hover { background: rgba(255,255,255,0.04); border-color: rgba(255,255,255,0.22); }
.btn-ghost:active { background: rgba(255,255,255,0.06); }

.btn-liquid {
	background: transparent;
	color: var(--text);
	border: 1px solid var(--border);
	position: relative;
	isolation: isolate;
	backdrop-filter: blur(var(--frost-blur)) saturate(140%);
	-webkit-backdrop-filter: blur(var(--frost-blur)) saturate(140%);
	overflow: hidden;
}
.btn-liquid::before {
	content: "";
	position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
	box-shadow: inset 0 0 var(--inner-shadow-blur) var(--inner-shadow-spread) var(--inner-shadow-color);
	background-color: rgba(var(--tint-color), var(--tint-opacity));
	transition: background-color .35s ease;
	z-index: 0;
}
.btn-liquid::after {
	content: "";
	position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
	background:
		radial-gradient(140px 140px at var(--px,50%) var(--py,50%), rgba(255,255,255,.26), rgba(255,255,255,0) 60%),
		linear-gradient(180deg, rgba(255,255,255,.18), rgba(255,255,255,0) 45%);
	mix-blend-mode: screen;
	opacity: 0;
	transition: opacity .25s ease;
	z-index: -1;
}
.btn-liquid:hover::before { background-color: rgba(var(--tint-color), var(--tint-opacity-active)); }
.btn-liquid:hover::after { opacity: .95; }
.btn-liquid:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(0,0,0,0.4); }
.btn-liquid:active { transform: translateY(0); }

/* Sections */
section { padding: 78px 0; position: relative; z-index: 1; }
.section-head { margin-bottom: 28px; }
.eyebrow { font-size: 12px; color: var(--muted); letter-spacing: .8px; text-transform: uppercase; }
.section-title {
	margin: 8px 0; font-size: clamp(22px, 3vw, 32px);
	color: var(--text);
	font-weight: 700;
}
.section-sub { color: var(--muted); max-width: 780px; }

/* Grid + Cards */
.grid {
	display: grid;
	grid-template-columns: repeat(12, 1fr);
	gap: 16px;
}
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-12 { grid-column: span 12; }

/* Liquid Glass Card */
.card {
	position: relative;
	border-radius: var(--radius);
	padding: 18px;
	background: transparent;
	border: 1px solid transparent;
	box-shadow: 0 6px var(--outer-shadow-blur) rgba(0, 0, 0, 0.2);
	transition: transform .25s ease, box-shadow .25s ease, opacity .25s ease, filter .25s ease;
	overflow: hidden;
	isolation: isolate;
	transform: translateZ(0);
}
.card > * { position: relative; z-index: 1; }
.card::before {
	content: "";
	position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
	box-shadow: inset 0 0 var(--inner-shadow-blur) var(--inner-shadow-spread) var(--inner-shadow-color);
	background-color: rgba(var(--tint-color), var(--tint-opacity));
	transition: background-color .35s ease;
	z-index: 0;
}
.card::after {
	content: "";
	position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
	backdrop-filter: blur(var(--frost-blur));
	-webkit-backdrop-filter: blur(var(--frost-blur));
	background:
		radial-gradient(180px 180px at var(--px,50%) var(--py,50%), rgba(255,255,255,.26), rgba(255,255,255,0) 60%),
		linear-gradient(180deg, rgba(255,255,255,.18), rgba(255,255,255,0) 45%);
	mix-blend-mode: screen;
	opacity: 0;
	transition: opacity .25s ease;
	z-index: -1;
}

.card:hover {
	transform: translateY(-6px) scale(1.02);
	box-shadow: 0 14px 38px rgba(0,0,0,0.5);
	animation: jelly .6s ease-out;
}
.card:hover::before { background-color: rgba(var(--tint-color), var(--tint-opacity-active)); }
.card:hover::after { opacity: .95; }

@keyframes jelly {
	0% { transform: translateY(-6px) scale(1.02, 1.02); }
	30% { transform: translateY(-6px) scale(1.04, 0.98); }
	55% { transform: translateY(-6px) scale(0.98, 1.03); }
	75% { transform: translateY(-6px) scale(1.02, 0.99); }
	100% { transform: translateY(-6px) scale(1.02, 1.02); }
}

/* Card inner content */
.card .icon {
	width: 44px; height: 44px; border-radius: 12px;
	display: grid; place-items: center; color: #0a0a0a;
	background: var(--primary);
	box-shadow: none;
}
.card h3 { margin: 12px 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }

.list { display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }
.list-item { display: flex; gap: 10px; align-items: center; color: var(--muted); font-size: 14px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--primary); box-shadow: none; }

/* Form */
.form { display: grid; grid-template-columns: repeat(12, 1fr); gap: 12px; }
.field { grid-column: span 6; display: flex; flex-direction: column; gap: 6px; }
.field-full { grid-column: span 12; }
label { font-size: 12px; color: var(--muted); }
input, textarea {
	background: rgba(255,255,255,0.04);
	border: 1px solid var(--border);
	color: var(--text);
	padding: 12px 14px; border-radius: 12px; outline: none;
	transition: border-color .2s, box-shadow .2s;
	font-family: inherit; font-size: 14px;
}
input:focus, textarea:focus {
	border-color: #e0e0e0;
	box-shadow: 0 0 0 4px rgba(255,255,255,.12);
}
textarea { min-height: 120px; resize: vertical; }

/* Footer */
footer { padding: 28px 0 40px; }
.footer-grid {
	display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px; align-items: center;
}
/* Enlarge only the footer logo */
footer .logo { width: 48px; height: 48px; }
.socials { display: flex; gap: 10px; }
.socials a {
	width: 36px; height: 36px; display: grid; place-items: center;
	background: rgba(255,255,255,0.04); border: 1px solid var(--border);
	border-radius: 10px; color: var(--text);
	transition: transform .2s, background .2s, border-color .2s;
}
.socials a:hover {
	transform: translateY(-2px);
	background: rgba(255,255,255,0.06);
	border-color: rgba(255,255,255,0.22);
}
.copy { color: var(--muted); font-size: 13px; text-align: right; }

/* Reveal on scroll (subtle) */
.reveal { opacity: 0; transform: translateY(8px); transition: opacity .45s ease, transform .45s ease; }
.reveal.show { opacity: 1; transform: translateY(0); }

/* Floating Back-to-Top (Liquid Glass) */
.back-to-top {
	position: fixed; right: 22px; bottom: 24px; z-index: 60;
	width: 44px; height: 44px; border-radius: var(--radius);
	border: 1px solid var(--border);
	background: transparent;
	display: grid; place-items: center;
	color: var(--text);
	box-shadow: var(--shadow-sm);
	backdrop-filter: blur(var(--frost-blur)) saturate(140%);
	-webkit-backdrop-filter: blur(var(--frost-blur)) saturate(140%);
	overflow: hidden;
	opacity: 0; transform: translateY(12px) scale(.96);
	pointer-events: none;
	transition: opacity .25s ease, transform .25s ease, box-shadow .25s ease;
	isolation: isolate;
}
.back-to-top::before {
	content: "";
	position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
	box-shadow: inset 0 0 var(--inner-shadow-blur) var(--inner-shadow-spread) var(--inner-shadow-color);
	background-color: rgba(var(--tint-color), var(--tint-opacity));
	transition: background-color .35s ease;
	z-index: 0;
}
.back-to-top::after {
	content: "";
	position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
	backdrop-filter: blur(var(--frost-blur));
	-webkit-backdrop-filter: blur(var(--frost-blur));
	background:
		radial-gradient(120px 120px at var(--px,50%) var(--py,50%), rgba(255,255,255,.26), rgba(255,255,255,0) 60%),
		linear-gradient(180deg, rgba(255,255,255,.18), rgba(255,255,255,0) 45%);
	mix-blend-mode: screen;
	opacity: 0;
	transition: opacity .25s ease;
	z-index: -1;
}
.back-to-top:hover {
	transform: translateY(0) scale(1.04);
	box-shadow: 0 10px 28px rgba(0,0,0,0.45);
}
.back-to-top:hover::before { background-color: rgba(var(--tint-color), var(--tint-opacity-active)); }
.back-to-top:hover::after { opacity: .95; }
.back-to-top.show { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }

/* Responsive */
@media (max-width: 960px) {
	.menu-toggle { display: inline-flex; }
	.menu {
		display: none; position: absolute; top: 68px; right: 16px; left: 16px; padding: 12px;
		background: rgba(10,10,10,0.92); border: 1px solid var(--border); border-radius: 14px; flex-direction: column; z-index: 40;
		backdrop-filter: blur(14px) saturate(160%);
		box-shadow: var(--shadow);
	}
	.menu.open { display: flex; }
	.menu .slider-bg { display: none; }
	.col-3 { grid-column: span 6; }
	.col-4 { grid-column: span 6; }
	.col-6 { grid-column: span 12; }
}
@media (max-width: 640px) {
	.hero { padding: 88px 0 40px; min-height: 72vh; }
	.col-3, .col-4, .col-6 { grid-column: span 12; }
	.cta { flex-direction: column; align-items: flex-start; }
	.copy { text-align: left; }
	.field { grid-column: span 12; }
	.back-to-top { right: 16px; bottom: 18px; width: 42px; height: 42px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
	* { animation: none !important; transition: none !important; }
}

/* Scrollbar - monochrome */
* { scrollbar-width: thin; scrollbar-color: rgba(255,255,255,.6) transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,.75); border-radius: 999px; border: 2px solid rgba(10,10,10,.55); }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,.95); }

/* Hide global scrollbar but keep scrolling */
html, body { -ms-overflow-style: none; scrollbar-width: none; }
html::-webkit-scrollbar, body::-webkit-scrollbar { width: 0; height: 0; }

/* Liquid Glass Inputs */
.input-liquid {
	position: relative;
	border-radius: 12px;
	padding: 6px 10px;
	border: 1px solid var(--border);
	background: transparent;
	backdrop-filter: blur(var(--frost-blur)) saturate(140%);
	-webkit-backdrop-filter: blur(var(--frost-blur)) saturate(140%);
	isolation: isolate;
	overflow: hidden;
	transition: box-shadow .25s ease, transform .2s ease;
}
.input-liquid::before {
	content: "";
	position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
	box-shadow: inset 0 0 var(--inner-shadow-blur) var(--inner-shadow-spread) var(--inner-shadow-color);
	background-color: rgba(var(--tint-color), var(--tint-opacity));
	transition: background-color .35s ease;
	z-index: 0;
}
.input-liquid::after {
	content: "";
	position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
	background:
		radial-gradient(160px 160px at var(--px,50%) var(--py,50%), rgba(255,255,255,.26), rgba(255,255,255,0) 60%),
		linear-gradient(180deg, rgba(255,255,255,.18), rgba(255,255,255,0) 45%);
	mix-blend-mode: screen;
	opacity: 0;
	transition: opacity .25s ease;
	z-index: -1;
}
.input-liquid:hover::before { background-color: rgba(var(--tint-color), var(--tint-opacity-active)); }
.input-liquid:hover::after { opacity: .9; }
.input-liquid:focus-within { box-shadow: 0 0 0 4px rgba(255,255,255,.12); }
.input-liquid:focus-within::before { background-color: rgba(var(--tint-color), var(--tint-opacity-active)); }

.input-liquid input,
.input-liquid textarea {
	appearance: none;
	-webkit-appearance: none;
	background: transparent;
	border: 0 !important;
	outline: none;
	box-shadow: none !important;
	-webkit-box-shadow: none !important;
	background-clip: padding-box;
	padding: 0;
	margin: 0;
	width: 100%;
	color: var(--text);
	font: inherit;
	line-height: 1.4;
	resize: none;
}
.input-liquid input { min-height: 32px; }
.input-liquid textarea { min-height: 110px; }
.input-liquid input::placeholder,
.input-liquid textarea::placeholder { color: var(--muted); }