/* Russell Tech LLC — design system */
@import url("fonts.css");

:root {
  --bg: #050505;
  --bg-elev: #0a0a0a;
  --bg-card: rgba(255, 255, 255, 0.035);
  --ink: #f4f4f1;
  --ink-soft: #d6d6d0;
  --ink-muted: #9a9a94;
  --ink-dim: #6e6e68;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.18);
  --glass: rgba(8, 8, 8, 0.58);
  --glass-strong: rgba(10, 10, 10, 0.78);
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
  --font-display: "Instrument Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-body: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --pad: clamp(1.25rem, 4vw, 3.75rem);
  --gutter: clamp(1rem, 3vw, 2rem);
  --max: 1180px;
  --max-wide: 1360px;
  --header-h: 4.5rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --radius: 14px;
}

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

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
}

img,
video,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: 0;
  cursor: pointer;
}

::selection {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
}

:focus-visible {
  outline: 1px solid #fff;
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  background: #fff;
  color: #111;
  padding: 0.6rem 0.9rem;
}

.skip-link:focus {
  top: 1rem;
}

/* Header */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--pad);
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease), backdrop-filter 0.4s var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: var(--glass-strong);
  border-bottom-color: var(--line);
  backdrop-filter: blur(22px) saturate(1.2);
  -webkit-backdrop-filter: blur(22px) saturate(1.2);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
}

.logo img,
.logo svg {
  width: 18px;
  height: 18px;
}

.logo-llc {
  color: var(--ink-dim);
  letter-spacing: 0.14em;
  font-weight: 500;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav a:not(.btn) {
  font-size: 0.86rem;
  color: var(--ink-soft);
  letter-spacing: 0.01em;
  transition: color 0.2s ease;
}

.nav a:not(.btn):hover,
.nav a.is-active:not(.btn) {
  color: var(--ink);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  position: relative;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  position: absolute;
  left: 11px;
  width: 20px;
  height: 1px;
  background: var(--ink);
  transition: transform 0.25s var(--ease), opacity 0.2s ease;
}

.nav-toggle span {
  top: 20px;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  left: 0;
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] span {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] span::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 3rem;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #111;
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform 0.25s var(--ease), background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  background: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
}

.btn-sm {
  min-height: 2.35rem;
  padding: 0.45rem 0.95rem;
  font-size: 0.8rem;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Layout */

.wrap {
  width: min(var(--max), calc(100% - var(--pad) * 2));
  margin-inline: auto;
}

.wrap-wide {
  width: min(var(--max-wide), calc(100% - var(--pad) * 2));
  margin-inline: auto;
}

.section {
  padding: clamp(4.5rem, 10vw, 8rem) 0;
}

.section-tight {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
}

.kicker {
  margin: 0 0 0.85rem;
  color: var(--ink-muted);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
}

.display {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 0.96;
}

h1.display {
  font-size: clamp(3.1rem, 8.4vw, 6.8rem);
}

h2.display {
  font-size: clamp(2.1rem, 5vw, 4rem);
}

h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.lede {
  max-width: 38rem;
  color: var(--ink-soft);
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.55;
}

.muted {
  color: var(--ink-muted);
}

.rule {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 0;
}

/* Hero */

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.08);
  animation: kenburns 28s var(--ease) forwards;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(5, 5, 5, 0.28) 0%, rgba(5, 5, 5, 0.12) 32%, rgba(5, 5, 5, 0.72) 78%, #050505 100%),
    linear-gradient(90deg, rgba(5, 5, 5, 0.35), transparent 48%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(var(--max-wide), calc(100% - var(--pad) * 2));
  margin: 0 auto;
  padding: 0 0 clamp(3.5rem, 8vw, 6rem);
}

.hero-content .display {
  max-width: 14ch;
}

.hero-content .lede {
  margin: 1.4rem 0 2rem;
  max-width: 34rem;
}

.hero-meta {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1.1rem;
  color: var(--ink-soft);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.scroll-hint {
  position: absolute;
  right: var(--pad);
  bottom: 2rem;
  z-index: 1;
  color: var(--ink-muted);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

/* Value */

.value {
  border-top: 1px solid var(--line);
}

.value-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(2rem, 6vw, 6rem);
  align-items: start;
}

.value p {
  margin: 0 0 1.1rem;
  color: var(--ink-soft);
  font-size: 1.12rem;
}

/* Pillars */

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2.5rem;
}

.pillar {
  position: relative;
  min-height: 28rem;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-elev);
}

.pillar img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.1s var(--ease);
}

.pillar:hover img {
  transform: scale(1.05);
}

.pillar::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 5, 5, 0.1) 10%, rgba(5, 5, 5, 0.88) 100%);
}

.pillar-body {
  position: absolute;
  inset: auto 0 0;
  z-index: 1;
  padding: 1.4rem 1.35rem 1.5rem;
}

.pillar-index {
  color: var(--ink-dim);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
}

.pillar h3 {
  margin: 0.35rem 0 0.45rem;
  font-size: 1.45rem;
}

.pillar p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.more {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
}

.more span {
  display: inline-block;
  transition: transform 0.25s var(--ease);
}

.pillar:hover .more span,
.media-card:hover .more span,
.text-link:hover span {
  transform: translateX(4px);
}

/* Featured */

.featured {
  position: relative;
  overflow: hidden;
}

.featured-media {
  position: relative;
  min-height: clamp(28rem, 62vw, 46rem);
  border: 1px solid var(--line);
}

.featured-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.featured-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(5, 5, 5, 0.86) 0%, rgba(5, 5, 5, 0.45) 46%, rgba(5, 5, 5, 0.18) 100%);
}

.featured-panel {
  position: absolute;
  inset: auto auto 0 0;
  z-index: 1;
  width: min(38rem, 100%);
  padding: clamp(1.5rem, 4vw, 3.2rem);
}

.featured-panel .lede {
  margin: 1rem 0 1.5rem;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.5rem 0 1.75rem;
}

.stat dt {
  color: var(--ink-muted);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.stat dd {
  margin: 0.25rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2vw, 1.7rem);
  letter-spacing: -0.03em;
}

/* Credibility */

.cred-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.cred {
  padding: 1.5rem 1.4rem;
  border: 1px solid var(--line);
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.cred strong {
  display: block;
  margin-bottom: 0.45rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
}

.cred p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.95rem;
}

/* CTA band */

.cta-band {
  position: relative;
  overflow: hidden;
  min-height: 28rem;
  display: grid;
  align-items: end;
}

.cta-band img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cta-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 5, 5, 0.2), rgba(5, 5, 5, 0.86));
}

.cta-band .wrap {
  position: relative;
  z-index: 1;
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

/* Page hero */

.page-hero {
  position: relative;
  min-height: 72svh;
  display: grid;
  align-items: end;
  overflow: hidden;
}

.page-hero.short {
  min-height: 58svh;
}

.page-hero-content {
  position: relative;
  z-index: 1;
  width: min(var(--max), calc(100% - var(--pad) * 2));
  margin: 0 auto;
  padding: 0 0 clamp(2.8rem, 6vw, 4.5rem);
}

.page-hero-content .display {
  max-width: 16ch;
}

.page-hero-content .lede {
  margin-top: 1.1rem;
}

/* Split / prose */

.split {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(2rem, 6vw, 6rem);
  align-items: start;
}

.split-media img {
  width: 100%;
  height: 100%;
  min-height: 24rem;
  object-fit: cover;
  border: 1px solid var(--line);
}

.prose p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.prose p:last-child {
  margin-bottom: 0;
}

.list-plain {
  margin: 0;
  padding: 0;
  list-style: none;
}

.list-plain li {
  padding: 0.95rem 0;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
}

.list-plain strong {
  display: block;
  color: var(--ink);
  margin-bottom: 0.2rem;
}

/* Cards / work */

.work-grid {
  display: grid;
  gap: 1rem;
}

.media-card {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  min-height: 26rem;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-elev);
}

.media-card.compact {
  grid-template-columns: 1fr 1fr;
  min-height: 20rem;
}

.media-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-card-body {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(1.4rem, 3vw, 2.2rem);
  background: var(--bg-card);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.media-card p {
  color: var(--ink-muted);
}

/* Specs / case */

.spec-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.spec {
  background: var(--bg);
  padding: 1.4rem 1.2rem;
}

.spec dt {
  color: var(--ink-muted);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.spec dd {
  margin: 0.45rem 0 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.layer-table {
  width: 100%;
  border-collapse: collapse;
}

.layer-table th,
.layer-table td {
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-size: 0.95rem;
}

.layer-table th {
  color: var(--ink-dim);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 500;
}

.layer-table td {
  color: var(--ink-soft);
}

.layer-table td:first-child {
  color: var(--ink);
  font-weight: 500;
}

.stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  padding: 0.38rem 0.7rem;
  border: 1px solid var(--line-strong);
  color: var(--ink-soft);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

/* Form */

.form {
  display: grid;
  gap: 1rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

label {
  display: grid;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--ink-muted);
}

input,
select,
textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line-strong);
  padding: 0.85rem 0.9rem;
  outline: none;
  transition: border-color 0.2s ease, background 0.2s ease;
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(255, 255, 255, 0.45);
  background: rgba(255, 255, 255, 0.05);
}

textarea {
  min-height: 8.5rem;
  resize: vertical;
}

.form-note {
  margin: 0;
  color: var(--ink-dim);
  font-size: 0.85rem;
}

.form-success {
  display: none;
  padding: 1.2rem 1.3rem;
  border: 1px solid var(--line-strong);
  background: var(--bg-card);
}

.form-success.is-visible {
  display: block;
}

.check {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.check input {
  width: auto;
  margin-top: 0.25rem;
}

.contact-aside {
  padding: 1.6rem 1.5rem;
  border: 1px solid var(--line);
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.contact-aside a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Footer */

.site-footer {
  padding: 3.5rem 0 2rem;
  border-top: 1px solid var(--line);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 0.8fr;
  gap: 2rem;
}

.footer-brand {
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
}

.footer-col h4 {
  margin: 0 0 0.85rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-dim);
  font-weight: 500;
}

.footer-col a {
  display: block;
  margin: 0.4rem 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.footer-col a:hover {
  color: var(--ink);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  color: var(--ink-dim);
  font-size: 0.8rem;
}

/* Reveal */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.9s var(--ease) forwards;
}

.d1 { animation-delay: 0.08s; }
.d2 { animation-delay: 0.16s; }
.d3 { animation-delay: 0.24s; }
.d4 { animation-delay: 0.32s; }

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes kenburns {
  to {
    transform: scale(1);
  }
}

/* Mobile drawer */

@media (max-width: 880px) {
  .nav-toggle {
    display: block;
  }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem var(--pad) 1.2rem;
    background: var(--glass-strong);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--line);
  }

  .nav .btn {
    margin-top: 0.9rem;
    width: fit-content;
  }

  .value-grid,
  .pillar-grid,
  .cred-grid,
  .split,
  .media-card,
  .media-card.compact,
  .spec-grid,
  .form-row,
  .footer-top,
  .stat-row {
    grid-template-columns: 1fr;
  }

  .pillar {
    min-height: 22rem;
  }

  .featured-media::after {
    background: linear-gradient(180deg, rgba(5, 5, 5, 0.15), rgba(5, 5, 5, 0.9));
  }

  .featured-panel {
    width: 100%;
  }

  .hero-content .display,
  .page-hero-content .display {
    max-width: none;
  }

  .scroll-hint {
    display: none;
  }

  .footer-bottom {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero-media img,
  .reveal,
  .pillar img {
    animation: none;
    transform: none;
    opacity: 1;
  }
}

@media print {
  .site-header,
  .site-footer,
  .nav-toggle,
  .btn-row,
  .cta-band {
    display: none !important;
  }

  body {
    background: #fff;
    color: #111;
  }

  .page-hero {
    min-height: auto;
    padding-top: 1rem;
  }

  .prose p,
  .layer-table td,
  .muted {
    color: #222;
  }
}