/*
 * uos base — INDUSTRY MATURE. Editorial-tech.
 * IBM Plex throughout. Hairlines, no drop shadows, restrained radii.
 */

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

html {
	font-size: 16px;
	-webkit-text-size-adjust: 100%;
	-moz-text-size-adjust: 100%;
	text-size-adjust: 100%;
	scroll-behavior: smooth;
}

body {
	margin: 0;
	font-family: var(--uos-font-body);
	font-size: var(--uos-body);
	line-height: var(--uos-lh-normal);
	color: var(--uos-ink);
	background-color: var(--uos-paper);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	min-height: 100vh;
	font-feature-settings: 'cv11', 'ss01', 'ss03';
}

/* Headings — IBM Plex, very tight leading, tight tracking on display */
h1, h2, h3, h4, h5, h6 {
	font-family: var(--uos-font-display);
	font-weight: 600;
	color: var(--uos-ink);
	letter-spacing: var(--uos-tracking-tight);
	margin: 0 0 var(--uos-s-4);
	line-height: var(--uos-lh-tight);
}

h1 {
	font-size: var(--uos-h1);
	font-weight: 600;
	letter-spacing: var(--uos-tracking-display);
}
h2 {
	font-size: var(--uos-h2);
	font-weight: 600;
}
h3 {
	font-size: var(--uos-h3);
	font-weight: 600;
}
h4 {
	font-size: 1rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	font-size: var(--uos-tiny);
	color: var(--uos-ink-tertiary);
}

p {
	margin: 0 0 var(--uos-s-4);
	max-width: 65ch;
}
p:last-child { margin-bottom: 0; }

a {
	color: var(--uos-ink);
	text-decoration: underline;
	text-decoration-color: var(--uos-line-strong);
	text-decoration-thickness: 1px;
	text-underline-offset: 3px;
	transition: color var(--uos-dur-fast) var(--uos-ease-out),
		text-decoration-color var(--uos-dur-fast) var(--uos-ease-out);
}
a:hover {
	color: var(--uos-violet);
	text-decoration-color: var(--uos-violet);
}
a:focus-visible {
	outline: 2px solid var(--uos-violet);
	outline-offset: 3px;
}

strong { font-weight: 600; color: var(--uos-ink); }
em { font-style: italic; }

code, pre {
	font-family: var(--uos-font-mono);
	font-size: 0.875em;
}
code {
	background: transparent;
	color: var(--uos-ink);
	padding: 0;
	border: 0;
}

/* Layout helpers — full bleed up to 1920px, then centered.
   This avoids runaway widths on 4K/5K while staying "full width" on
   every realistic desktop / laptop viewport (≥ 1440). */
.uos-container {
	width: 100%;
	max-width: 1920px;
	margin-inline: auto;
	padding-inline: clamp(var(--uos-s-3), 1.5vw, var(--uos-s-5));
}

.uos-container-sm {
	width: 100%;
	max-width: var(--uos-container-sm);
	margin-inline: auto;
	padding-inline: clamp(var(--uos-s-3), 1.5vw, var(--uos-s-5));
}

.uos-container-xs {
	width: 100%;
	max-width: var(--uos-container-xs);
	margin-inline: auto;
	padding-inline: clamp(var(--uos-s-3), 1.5vw, var(--uos-s-5));
}

/* Inner prose constraint: keeps running text at ~72ch max for readability. */
.uos-prose { max-width: 72ch; }

/* Sections — restrained padding, hairlines between */
.uos-section {
	padding-block: clamp(var(--uos-s-10), 7vw, var(--uos-s-16));
	border-top: 1px solid var(--uos-line);
}
.uos-section:first-of-type {
	border-top: 0;
}
.uos-section--alt {
	background: var(--uos-surface-alt);
}
.uos-section--ink {
	background: var(--uos-ink);
	color: var(--uos-paper);
	border-top-color: var(--uos-ink);
}
.uos-section--ink h1,
.uos-section--ink h2,
.uos-section--ink h3 { color: var(--uos-paper); }

/* Section number + kicker — IBM Plex Mono, small caps style */
.uos-kicker {
	display: flex;
	align-items: center;
	gap: var(--uos-s-3);
	font-family: var(--uos-font-mono);
	font-size: var(--uos-tiny);
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--uos-ink-tertiary);
	margin-bottom: var(--uos-s-6);
	font-weight: 500;
}
.uos-kicker__number {
	color: var(--uos-ink);
	font-weight: 600;
}
.uos-kicker__label {
	color: var(--uos-ink-tertiary);
}

/* Display hero — editorial */
.uos-display {
	font-family: var(--uos-font-display);
	font-size: var(--uos-display-1);
	font-weight: 600;
	line-height: var(--uos-lh-display);
	letter-spacing: var(--uos-tracking-display);
	color: var(--uos-ink);
	margin: 0 0 var(--uos-s-6);
	max-width: 18ch;
}

.uos-display-sm {
	font-family: var(--uos-font-display);
	font-size: var(--uos-display-2);
	font-weight: 600;
	line-height: var(--uos-lh-tight);
	letter-spacing: var(--uos-tracking-tight);
	color: var(--uos-ink);
	margin: 0 0 var(--uos-s-5);
}

/* Lead paragraph */
.uos-lead {
	font-size: var(--uos-body-lg);
	line-height: var(--uos-lh-snug);
	color: var(--uos-ink-soft);
	max-width: 60ch;
	font-weight: 400;
}

/* Buttons — restrained, sharp corners, ink color primary */
.uos-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: var(--uos-s-2);
	font-family: var(--uos-font-body);
	font-weight: 500;
	font-size: 0.9375rem;
	padding: 0.6875rem 1.25rem;
	border-radius: var(--uos-r-md);
	border: 1px solid var(--uos-ink);
	cursor: pointer;
	transition: background-color var(--uos-dur-fast) var(--uos-ease-out),
		color var(--uos-dur-fast) var(--uos-ease-out),
		border-color var(--uos-dur-fast) var(--uos-ease-out);
	text-decoration: none;
	white-space: nowrap;
	letter-spacing: -0.005em;
}

.uos-btn--primary {
	background: var(--uos-ink);
	color: var(--uos-paper);
}
.uos-btn--primary:hover {
	background: var(--uos-violet);
	border-color: var(--uos-violet);
	color: #fff;
}

.uos-btn--ghost {
	background: transparent;
	color: var(--uos-ink);
	border-color: var(--uos-line-strong);
}
.uos-btn--ghost:hover {
	border-color: var(--uos-ink);
	background: var(--uos-surface);
}

.uos-btn--link {
	background: transparent;
	color: var(--uos-ink);
	border-color: transparent;
	padding: 0.5rem 0;
	text-decoration: none;
}
.uos-btn--link::after {
	content: ' →';
	transition: transform var(--uos-dur-fast) var(--uos-ease-out);
	display: inline-block;
}
.uos-btn--link:hover {
	color: var(--uos-violet);
}
.uos-btn--link:hover::after {
	transform: translateX(3px);
}

/* Cards — flat with hairline */
.uos-card {
	background: var(--uos-surface);
	border: 1px solid var(--uos-line);
	border-radius: var(--uos-r-md);
	padding: var(--uos-s-5);
	transition: border-color var(--uos-dur) var(--uos-ease-out);
}
.uos-card:hover {
	border-color: var(--uos-ink);
}
.uos-card h3 {
	font-size: 1rem;
	font-weight: 600;
	text-transform: none;
	letter-spacing: var(--uos-tracking-tight);
	color: var(--uos-ink);
	margin-bottom: var(--uos-s-2);
}
.uos-card p {
	color: var(--uos-ink-soft);
	font-size: var(--uos-small);
	line-height: var(--uos-lh-snug);
	margin: 0;
}

/* Mark / tag — mono, tight */
.uos-tag {
	display: inline-block;
	font-family: var(--uos-font-mono);
	font-size: 0.6875rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--uos-ink-tertiary);
	margin-bottom: var(--uos-s-3);
	font-weight: 500;
}

/* Grid */
.uos-grid {
	display: grid;
	gap: var(--uos-s-5);
}
.uos-grid--3 { grid-template-columns: repeat(3, 1fr); }
.uos-grid--2 { grid-template-columns: repeat(2, 1fr); }
.uos-grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 960px) {
	.uos-grid--3,
	.uos-grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
	.uos-grid--3,
	.uos-grid--4,
	.uos-grid--2 { grid-template-columns: 1fr; }
}

/* Adaptive video (landscape on desktop, portrait on mobile) */
.uos-video-l { display: block; }
/* .uos-video-p deprecated: kept as no-op for backwards-compat; do not introduce new usage. */
/* Single-video mode: catalogue + hero now ship one landscape variant per slot. */

/* Hero — editorial split: text on the left, flagship video thumbnail on the right */
.uos-hero-split {
	display: grid;
	grid-template-columns: 1.15fr 1fr;
	gap: var(--uos-s-10);
	align-items: center;
}
.uos-hero-split__text { max-width: 640px; }
.uos-hero-split__media {
	position: relative;
	aspect-ratio: 16 / 9;
	max-height: 520px;
	width: 100%;
	overflow: hidden;
	border-radius: 6px;
	border: 1px solid var(--uos-line);
	background: var(--uos-ink);
}
.uos-hero-split__media > video {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}
@media (max-width: 1100px) {
	.uos-hero-split__media { max-height: 440px; }
}
@media (max-width: 768px) {
	.uos-hero-split {
		grid-template-columns: 1fr;
		gap: var(--uos-s-8);
		text-align: center;
	}
	.uos-hero-split__text { max-width: 720px; margin-inline: auto; }
	.uos-hero-split__text .uos-kicker { justify-content: center; }
	.uos-hero-split .uos-anim[style*="display: flex"] {
		justify-content: center;
		margin-top: var(--uos-s-8);
	}
	.uos-hero-split__media {
		max-height: 300px;
		max-width: 540px;
		margin-inline: auto;
	}
}

/* Media wrapper — holds the optional mute/unmute toggle */
.uos-media-wrap { position: relative; }
.uos-media-wrap > video { display: block; }
.uos-media-toggle {
	position: absolute;
	right: 12px;
	bottom: 12px;
	z-index: 2;
	width: 36px;
	height: 36px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 0;
	background: rgba(10, 10, 10, 0.72);
	color: #ffffff;
	border: 1px solid rgba(255, 255, 255, 0.18);
	border-radius: 999px;
	cursor: pointer;
	transition: background 120ms ease, transform 120ms ease;
	backdrop-filter: blur(6px);
	-webkit-backdrop-filter: blur(6px);
}
.uos-media-toggle:hover { background: rgba(10, 10, 10, 0.9); }
.uos-media-toggle:active { transform: scale(0.94); }
.uos-media-toggle .lucide-icon { display: inline-flex; align-items: center; justify-content: center; }
.uos-media-toggle .icon-unmute { display: none; }
.uos-media-toggle[data-muted="0"] .icon-mute { display: none; }
.uos-media-toggle[data-muted="0"] .icon-unmute { display: inline-flex; }

/* Lucide icon wrapper — flexible inline element with currentColor inheritance. */
.lucide-icon { display: inline-flex; align-items: center; justify-content: center; color: inherit; }
.lucide-icon svg { display: block; }

/* Icon-only button — base for any lucide-styled control. */
.uos-btn--icon { line-height: 0; }

/* App catalogue grid — 4 col desktop, 3 col tablette, 1 col mobile (carrousel swipeable) */
.uos-app-grid {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: var(--uos-s-4);
}
@media (max-width: 1100px) {
	.uos-app-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 800px) {
	.uos-app-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
	/* Mobile: horizontal carousel, peek effect, snap-centered */
	.uos-app-grid {
		grid-template-columns: none;
		display: flex;
		flex-wrap: nowrap;
		overflow-x: auto;
		overflow-y: hidden;
		scroll-snap-type: x mandatory;
		-webkit-overflow-scrolling: touch;
		scrollbar-width: none;
		gap: var(--uos-s-4);
		padding: var(--uos-s-2) clamp(var(--uos-s-4), 5vw, var(--uos-s-5));
		margin-inline: calc(clamp(var(--uos-s-4), 5vw, var(--uos-s-5)) * -1);
		-webkit-mask-image: linear-gradient(to right, transparent 0, black var(--uos-s-6), black calc(100% - var(--uos-s-6)), transparent 100%);
		        mask-image: linear-gradient(to right, transparent 0, black var(--uos-s-6), black calc(100% - var(--uos-s-6)), transparent 100%);
	}
	.uos-app-grid::-webkit-scrollbar { display: none; }
	.uos-app-card {
		flex: 0 0 78%;
		scroll-snap-align: center;
		max-width: 360px;
	}
}

.uos-app-card {
	margin: 0;
	border: 1px solid var(--uos-line);
	border-radius: var(--uos-r-md);
	overflow: hidden;
	background: var(--uos-ink);
	display: flex;
	flex-direction: column;
	transition: border-color var(--uos-dur) var(--uos-ease-out);
}
.uos-app-card:hover {
	border-color: var(--uos-ink);
}
.uos-app-card__video {
	position: relative;
	width: 100%;
	aspect-ratio: 16 / 9;
	background: var(--uos-ink);
	overflow: hidden;
}
.uos-app-card__video video {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}
.uos-app-card__caption {
	padding: var(--uos-s-3) var(--uos-s-4);
	background: var(--uos-surface);
	display: grid;
	grid-template-columns: auto 1fr;
	gap: var(--uos-s-2) var(--uos-s-3);
	align-items: baseline;
	border-top: 1px solid var(--uos-line);
}
.uos-app-card__num {
	grid-row: span 2;
	font-family: var(--uos-font-mono);
	font-size: var(--uos-tiny);
	color: var(--uos-ink-tertiary);
	letter-spacing: 0.08em;
	align-self: start;
	padding-top: 2px;
}
.uos-app-card__name {
	font-family: var(--uos-font-display);
	font-weight: 600;
	font-size: 0.9375rem;
	color: var(--uos-ink);
	letter-spacing: var(--uos-tracking-tight);
}
.uos-app-card__tagline {
	grid-column: 2;
	font-size: var(--uos-small);
	color: var(--uos-ink-soft);
	line-height: 1.4;
}

/* Header / nav — restrained, hairline border */
.uos-nav {
	position: sticky;
	top: 0;
	z-index: 50;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--uos-s-5);
	padding: var(--uos-s-3) clamp(var(--uos-s-4), 4vw, var(--uos-s-6));
	background: rgba(250, 250, 247, 0.85);
	-webkit-backdrop-filter: blur(12px);
	backdrop-filter: blur(12px);
	border-bottom: 1px solid var(--uos-line);
}

.uos-nav__logo {
	display: flex;
	align-items: center;
	gap: var(--uos-s-3);
	font-family: var(--uos-font-display);
	font-weight: 600;
	font-size: 1rem;
	letter-spacing: var(--uos-tracking-tight);
	color: var(--uos-ink);
	text-decoration: none;
}
.uos-nav__logo img,
.uos-nav__logo svg {
	height: 24px;
	width: auto;
	display: block;
}

.uos-nav__links {
	display: flex;
	gap: clamp(var(--uos-s-4), 2vw, var(--uos-s-6));
	font-size: var(--uos-small);
	color: var(--uos-ink-soft);
	font-weight: 500;
}
.uos-nav__links a {
	color: var(--uos-ink-soft);
	text-decoration: none;
}
.uos-nav__links a:hover { color: var(--uos-ink); }

@media (max-width: 860px) {
	.uos-nav__links { display: none; }
}

/* Footer — minimal single-column */
.uos-footer {
	border-top: 1px solid var(--uos-line);
	padding: var(--uos-s-12) clamp(var(--uos-s-4), 5vw, var(--uos-s-6)) var(--uos-s-6);
	font-size: var(--uos-small);
	color: var(--uos-ink-soft);
	background: var(--uos-paper);
}

.uos-footer__inner {
	max-width: var(--uos-container);
	margin-inline: auto;
}

.uos-footer__brand {
	margin-bottom: var(--uos-s-6);
}
.uos-footer__brand-logo {
	display: inline-flex;
	align-items: center;
	gap: var(--uos-s-3);
	font-family: var(--uos-font-display);
	font-weight: 600;
	font-size: 1rem;
	color: var(--uos-ink);
	text-decoration: none;
	letter-spacing: var(--uos-tracking-tight);
	margin-bottom: var(--uos-s-3);
}
.uos-footer__brand-logo img,
.uos-footer__brand-logo svg {
	height: 24px;
	width: auto;
	display: block;
}
.uos-footer__brand p {
	color: var(--uos-ink-soft);
	font-size: var(--uos-small);
	line-height: var(--uos-lh-snug);
	margin: 0;
	max-width: 36ch;
}

.uos-footer__links {
	display: flex;
	flex-wrap: wrap;
	gap: var(--uos-s-3) var(--uos-s-6);
	font-size: var(--uos-small);
	padding-block: var(--uos-s-5);
	border-top: 1px solid var(--uos-line);
	border-bottom: 1px solid var(--uos-line);
	margin-bottom: var(--uos-s-4);
}
.uos-footer__links a {
	color: var(--uos-ink);
	text-decoration: none;
}
.uos-footer__links a:hover {
	color: var(--uos-violet);
}

.uos-footer__bottom {
	display: flex;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: var(--uos-s-3);
	font-size: var(--uos-tiny);
	color: var(--uos-ink-tertiary);
	font-family: var(--uos-font-mono);
}
.uos-footer__bottom a {
	color: var(--uos-ink-tertiary);
	text-decoration: none;
}
.uos-footer__bottom a:hover { color: var(--uos-ink); }

/* Selection */
::selection {
	background: var(--uos-ink);
	color: var(--uos-paper);
}

/* Scrollbar — restrained */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--uos-paper); }
::-webkit-scrollbar-thumb { background: var(--uos-line-strong); }
::-webkit-scrollbar-thumb:hover { background: var(--uos-ink); }

/* Utility — visually hidden but accessible */
.uos-sr-only {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

/* App preview modal — opened on app card click. Wider, not fullscreen, sound on. */
.uos-modal {
	position: fixed;
	inset: 0;
	z-index: 1000;
	display: grid;
	place-items: center;
	padding: clamp(var(--uos-s-4), 4vw, var(--uos-s-8));
}
.uos-modal[hidden] { display: none; }
.uos-modal__backdrop {
	position: absolute;
	inset: 0;
	background: rgba(10, 10, 10, 0.78);
	cursor: pointer;
}
.uos-modal__panel {
	position: relative;
	width: min(78vw, 1100px);
	max-height: 88vh;
	display: flex;
	flex-direction: column;
	gap: var(--uos-s-5);
	padding: var(--uos-s-6);
	background: var(--uos-paper);
	border: 1px solid var(--uos-line);
	border-radius: 8px;
	box-shadow: 0 18px 48px rgba(0, 0, 0, 0.18);
	overflow: hidden;
}
.uos-modal__media {
	position: relative;
	aspect-ratio: 16 / 9;
	width: 100%;
	background: var(--uos-ink);
	border-radius: 6px;
	border: 1px solid var(--uos-line);
	overflow: hidden;
}
.uos-modal__video {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}
.uos-modal__close {
	position: absolute;
	top: 14px;
	right: 14px;
	width: 38px;
	height: 38px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	background: rgba(10, 10, 10, 0.62);
	color: #fff;
	border: 1px solid rgba(255, 255, 255, 0.18);
	border-radius: 999px;
	cursor: pointer;
	font-size: 0;
	padding: 0;
	line-height: 0;
	transition: background 120ms ease, transform 120ms ease;
	z-index: 3;
	backdrop-filter: blur(6px);
	-webkit-backdrop-filter: blur(6px);
}
.uos-modal__close:hover { background: rgba(10, 10, 10, 0.85); }
.uos-modal__close:active { transform: scale(0.94); }
.uos-modal__nav {
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
	width: 44px;
	height: 44px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	background: var(--uos-paper);
	border: 1px solid var(--uos-line);
	border-radius: 999px;
	cursor: pointer;
	color: var(--uos-ink);
	padding: 0;
	line-height: 0;
	transition: background 120ms ease, transform 120ms ease, color 120ms ease;
	z-index: 3;
	box-shadow: 0 6px 16px rgba(0, 0, 0, 0.18);
}
.uos-modal__nav:hover { background: #fff; }
.uos-modal__nav:active { transform: translateY(-50%) scale(0.94); }
.uos-modal__nav--prev { left: -56px; }
.uos-modal__nav--next { right: -56px; }
@media (max-width: 1180px) {
	.uos-modal__nav--prev { left: 8px; }
	.uos-modal__nav--next { right: 8px; }
}
.uos-modal__meta {
	display: flex;
	flex-wrap: wrap;
	align-items: baseline;
	gap: var(--uos-s-3) var(--uos-s-5);
	padding: 0 var(--uos-s-1);
}
.uos-modal__num {
	font-family: var(--uos-font-mono);
	font-size: var(--uos-tiny);
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--uos-ink-tertiary);
}
.uos-modal__name {
	font-family: var(--uos-font-sans);
	font-size: var(--uos-h3);
	font-weight: 600;
	color: var(--uos-ink);
	line-height: 1.2;
}
.uos-modal__tagline {
	font-family: var(--uos-font-sans);
	font-size: var(--uos-body-sm);
	color: var(--uos-ink-secondary);
}

/* App card — cursor signals clickability now that it opens a modal. */
.uos-app-card { cursor: pointer; }

/* Mobiles: modal almost fullscreen, nav arrows inside frame */
@media (max-width: 768px) {
	.uos-modal { padding: var(--uos-s-3); }
	.uos-modal__panel { width: 100%; max-height: 92vh; padding: var(--uos-s-4); }
	.uos-modal__nav { width: 36px; height: 36px; }
}