/* ── rtcdev ─────────────────────────────────────────────
   Type: Instrument Serif (display) + IBM Plex Mono (everything else)
   ─────────────────────────────────────────────────────── */

:root {
	--ink:        #0e0d0c;
	--ink-2:      #161513;
	--paper:      #ece7de;
	--paper-dim:  #9a938a;
	--paper-faint:#5c564e;
	/* Accent — change these three together to re-skin the whole page. */
	--signal:     #7fb2e0;
	--signal-dim: #40668c;
	--signal-rgb: 127, 178, 224;
	--rule:       #2a2724;

	--mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
	--display: "Instrument Serif", Georgia, "Times New Roman", serif;

	--gutter: clamp(1.25rem, 5vw, 5.5rem);
	--measure: 68rem;
	--ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
	scroll-behavior: smooth;
	scroll-padding-top: 6rem;
	-webkit-text-size-adjust: 100%;
}

body {
	margin: 0;
	background-color: var(--ink);
	background-image:
		radial-gradient(120% 80% at 12% -10%, rgba(var(--signal-rgb), 0.10), transparent 62%),
		radial-gradient(90% 70% at 100% 0%, rgba(158, 116, 82, 0.09), transparent 60%),
		linear-gradient(var(--rule) 1px, transparent 1px),
		linear-gradient(90deg, var(--rule) 1px, transparent 1px);
	background-size: auto, auto, 100% 5.5rem, 5.5rem 100%;
	background-attachment: fixed;
	color: var(--paper);
	font-family: var(--mono);
	font-weight: 300;
	font-size: 15px;
	line-height: 1.7;
	overflow-x: hidden;
}

/* faint film grain over the whole page */
.grain {
	position: fixed;
	inset: -50%;
	pointer-events: none;
	z-index: 100;
	opacity: 0.035;
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
}

a { color: inherit; }

::selection { background: var(--signal); color: var(--ink); }

:focus-visible {
	outline: 2px solid var(--signal);
	outline-offset: 3px;
}

/* ── Masthead ─────────────────────────────────────────── */

.masthead {
	position: sticky;
	top: 0;
	z-index: 50;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1rem;
	padding: 1.1rem var(--gutter);
	border-bottom: 1px solid transparent;
	transition: background 0.4s var(--ease), border-color 0.4s var(--ease), padding 0.4s var(--ease);
}

.masthead.is-stuck {
	background: rgba(14, 13, 12, 0.82);
	backdrop-filter: blur(14px) saturate(140%);
	-webkit-backdrop-filter: blur(14px) saturate(140%);
	border-bottom-color: var(--rule);
	padding-block: 0.7rem;
}

.wordmark {
	font-size: 1.05rem;
	font-weight: 500;
	letter-spacing: 0.02em;
	text-decoration: none;
	white-space: nowrap;
}
.wordmark__mark { color: var(--paper); }
.wordmark__dim  { color: var(--signal); }
.wordmark__blink {
	color: var(--signal);
	animation: blink 1.15s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.nav {
	display: flex;
	align-items: center;
	gap: clamp(0.9rem, 2.5vw, 2.25rem);
	font-size: 0.8rem;
	letter-spacing: 0.06em;
	text-transform: uppercase;
}

.nav a {
	position: relative;
	text-decoration: none;
	color: var(--paper-dim);
	padding-block: 0.25rem;
	transition: color 0.25s var(--ease);
}
.nav a::after {
	content: "";
	position: absolute;
	left: 0; right: 100%; bottom: 0;
	height: 1px;
	background: var(--signal);
	transition: right 0.35s var(--ease);
}
.nav a:hover,
.nav a.is-active { color: var(--paper); }
.nav a:hover::after,
.nav a.is-active::after { right: 0; }

.nav__out { display: inline-flex; align-items: center; gap: 0.4em; }
.nav__out svg { transition: transform 0.3s var(--ease); }
.nav__out:hover svg { transform: translate(2px, -2px); }

/* ── Hero ─────────────────────────────────────────────── */

.hero {
	max-width: var(--measure);
	margin: 0 auto;
	padding: clamp(4.5rem, 14vh, 9rem) var(--gutter) clamp(5rem, 12vh, 8rem);
}

.hero__eyebrow {
	margin: 0 0 clamp(1.5rem, 4vh, 2.5rem);
	font-size: 0.76rem;
	letter-spacing: 0.22em;
	text-transform: uppercase;
	color: var(--paper-dim);
}

.hero__title {
	margin: 0;
	font-family: var(--display);
	font-weight: 400;
	font-size: clamp(3.2rem, 12vw, 8.5rem);
	line-height: 0.92;
	letter-spacing: -0.02em;
}
.hero__title span { display: block; }
.hero__em { padding-left: clamp(0.5rem, 8vw, 6rem); }
.hero__em em {
	color: var(--signal);
	font-style: italic;
}

.hero__body {
	max-width: 40ch;
	margin: clamp(2rem, 5vh, 3rem) 0 0 auto;
	color: var(--paper-dim);
	font-size: 0.95rem;
	line-height: 1.85;
}

.hero__meta {
	display: flex;
	align-items: center;
	gap: 1.25rem;
	margin-top: clamp(2.5rem, 6vh, 4rem);
}

.btn {
	display: inline-block;
	padding: 0.7rem 1.4rem;
	border: 1px solid var(--signal);
	color: var(--signal);
	font-size: 0.78rem;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	text-decoration: none;
	background: linear-gradient(var(--signal), var(--signal)) no-repeat left center / 0% 100%;
	transition: background-size 0.4s var(--ease), color 0.3s var(--ease);
}
.btn:hover {
	background-size: 100% 100%;
	color: var(--ink);
}

.hero__rule {
	flex: 1;
	height: 1px;
	background: linear-gradient(90deg, var(--rule), transparent);
}

.hero__stamp {
	font-size: 0.72rem;
	letter-spacing: 0.2em;
	text-transform: uppercase;
	color: var(--paper-faint);
}

/* ── Sections ─────────────────────────────────────────── */

.section {
	max-width: var(--measure);
	margin: 0 auto;
	padding: clamp(3.5rem, 9vh, 6.5rem) var(--gutter);
	border-top: 1px solid var(--rule);
}

.section__head {
	margin-bottom: clamp(2rem, 5vh, 3.5rem);
}

.section__title {
	margin: 0;
	font-family: var(--display);
	font-weight: 400;
	font-size: clamp(2.2rem, 6vw, 3.6rem);
	line-height: 1;
	letter-spacing: -0.015em;
}

.section__note {
	margin: 0.75rem 0 0;
	max-width: 46ch;
	color: var(--paper-faint);
	font-size: 0.82rem;
}

/* ── Hosted apps ──────────────────────────────────────── */

.apps {
	list-style: none;
	margin: 0;
	padding: 0;
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr));
	gap: 1px;
	background: var(--rule);
	border: 1px solid var(--rule);
}

.app { position: relative; isolation: isolate; }

.app > a,
.app > div {
	display: block;
	height: 100%;
	padding: 1.75rem;
	background: var(--ink);
	text-decoration: none;
	transition: background 0.35s var(--ease);
}

.app > a:hover { background: var(--ink-2); }

.app__status {
	display: inline-flex;
	align-items: center;
	gap: 0.5em;
	font-size: 0.68rem;
	letter-spacing: 0.2em;
	text-transform: uppercase;
	color: var(--signal);
}
.app__status i {
	width: 6px;
	height: 6px;
	border-radius: 50%;
	background: var(--signal);
	box-shadow: 0 0 0 0 rgba(var(--signal-rgb), 0.6);
	animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
	70%  { box-shadow: 0 0 0 7px rgba(var(--signal-rgb), 0); }
	100% { box-shadow: 0 0 0 0 rgba(var(--signal-rgb), 0); }
}

.app__name {
	margin: 0.9rem 0 0;
	font-family: var(--display);
	font-weight: 400;
	font-size: clamp(1.6rem, 3.4vw, 2.2rem);
	line-height: 1.1;
	letter-spacing: -0.01em;
	transition: color 0.3s var(--ease);
}
.app > a:hover .app__name { color: var(--signal); }

.app__desc {
	margin: 0.6rem 0 1.75rem;
	max-width: 34ch;
	color: var(--paper-faint);
	font-size: 0.83rem;
	line-height: 1.7;
	transition: color 0.3s var(--ease);
}
.app > a:hover .app__desc { color: var(--paper-dim); }

.app__host {
	display: inline-flex;
	align-items: center;
	gap: 0.5em;
	font-size: 0.75rem;
	letter-spacing: 0.04em;
	color: var(--paper-dim);
	border-bottom: 1px solid var(--rule);
	padding-bottom: 0.3rem;
	transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}
.app > a:hover .app__host { color: var(--signal); border-color: var(--signal-dim); }
.app__host svg { transition: transform 0.3s var(--ease); }
.app > a:hover .app__host svg { transform: translate(2px, -2px); }

/* Placeholder slot for whatever gets deployed next. */
.app--soon > div { opacity: 0.4; }
.app--soon .app__name { color: var(--paper-dim); }
.app__status--soon { color: var(--paper-faint); }

.more-link {
	display: inline-flex;
	align-items: center;
	gap: 0.5em;
	margin-top: 2rem;
	font-size: 0.78rem;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--paper-dim);
	text-decoration: none;
	border-bottom: 1px solid var(--rule);
	padding-bottom: 0.35rem;
	transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}
.more-link:hover { color: var(--signal); border-color: var(--signal); }
.more-link svg { transition: transform 0.3s var(--ease); }
.more-link:hover svg { transform: translate(2px, -2px); }

/* ── Footer ───────────────────────────────────────────── */

.footer {
	display: grid;
	grid-template-columns: minmax(0, 1fr) auto;
	align-items: start;
	gap: 1.5rem 3rem;
	max-width: var(--measure);
	margin: 0 auto;
	padding: clamp(3rem, 7vh, 4.5rem) var(--gutter) 3rem;
	border-top: 1px solid var(--rule);
}

.footer__id p { margin: 0; }

.footer__name {
	font-family: var(--display);
	font-size: clamp(1.5rem, 3.6vw, 2.1rem);
	line-height: 1.15;
	letter-spacing: -0.01em;
}

.footer__role {
	margin-top: 0.4rem !important;
	color: var(--paper-dim);
	font-size: 0.85rem;
}

.footer__note {
	margin-top: 0.15rem !important;
	color: var(--paper-faint);
	font-size: 0.82rem;
}

.footer__links {
	display: flex;
	gap: 1.5rem;
	list-style: none;
	margin: 0;
	padding: 0;
	font-size: 0.76rem;
	letter-spacing: 0.14em;
	text-transform: uppercase;
}
.footer__links a {
	text-decoration: none;
	color: var(--paper-dim);
	border-bottom: 1px solid var(--rule);
	padding-bottom: 0.3rem;
	transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.footer__links a:hover { color: var(--signal); border-color: var(--signal-dim); }

.footer__top {
	grid-column: 2;
	justify-self: end;
	font-size: 0.72rem;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--paper-faint);
	text-decoration: none;
	transition: color 0.25s var(--ease);
}
.footer__top:hover { color: var(--signal); }

/* ── Reveal on scroll ─────────────────────────────────── */

.reveal {
	opacity: 0;
	transform: translateY(16px);
	transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible {
	opacity: 1;
	transform: none;
}

/* ── Responsive ───────────────────────────────────────── */

@media (max-width: 860px) {
	.hero__body { margin-left: 0; }
}

@media (max-width: 700px) {
	body { background-size: auto, auto, 100% 4rem, 4rem 100%; }

	.nav { gap: 1.1rem; font-size: 0.72rem; }

	.hero__em { padding-left: 0; }
	.hero__meta { flex-wrap: wrap; }
	.hero__rule { display: none; }

	.app > a,
	.app > div { padding: 1.5rem 1.25rem; }

	.footer { grid-template-columns: 1fr; }
	.footer__links { flex-wrap: wrap; gap: 1rem 1.5rem; }
	.footer__top { grid-column: 1; justify-self: start; }
}

@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	*, *::before, *::after {
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.01ms !important;
	}
	.reveal { opacity: 1; transform: none; }
}