/* ============================================================
   C&M Networks — site styles
   Editorial, print-inspired system: paper & ink, hairline
   rules, letterspaced caps. Light/dark via [data-theme].
   ============================================================ */

:root,
:root[data-theme="light"] {
  color-scheme: light;
  --paper: #efece3;
  --paper-2: #e8e4d6;
  --ink: #181512;
  --muted: #655d4e;
  --line: #d3cdba;
  --line-strong: #181512;
  --accent: #a8431f;
  --font-body: "Archivo", system-ui, -apple-system, "Helvetica Neue", sans-serif;
  --font-serif: "Instrument Serif", Georgia, serif;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #161310;
  --paper-2: #1d1915;
  --ink: #ece7da;
  --muted: #a59c88;
  --line: #353027;
  --line-strong: #ece7da;
  --accent: #d97e48;
}

/* ---------- Reset & base ---------- */

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

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.25s ease, color 0.25s ease;
}

h1,
h2,
h3 {
  font-family: var(--font-body);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 1.25rem;
}

h1 {
  font-size: clamp(2.6rem, 6.5vw, 5rem);
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.9rem, 3.6vw, 3rem);
}

h3 {
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 1rem;
}

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

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

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

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

.container {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 3rem);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  font-weight: 600;
  padding: 0.7rem 1.1rem;
}

.skip-link:focus {
  left: 0;
}

/* Letterspaced caps — the "NETWORKS" of the logo */
.label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Italic serif accent for headline words */
.serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  letter-spacing: 0;
}

.lede {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--muted);
  max-width: 58ch;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.95rem 1.8rem;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.btn:hover {
  background: var(--ink);
  color: var(--paper);
}

.btn-solid {
  background: var(--ink);
  color: var(--paper);
}

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

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2.25rem;
}

.text-link {
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.text-link:hover {
  color: var(--accent);
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--line-strong);
  transition: background-color 0.25s ease;
}

.header-grid {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 76px;
}

/* Stacked wordmark, as in the logo */
.brand {
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
}

.brand-mark {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.brand-word {
  font-size: 0.5rem;
  font-weight: 600;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  margin-top: 0.3rem;
  color: var(--muted);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.9rem;
}

.site-nav a {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.3rem 0;
  transition: color 0.15s ease;
}

.site-nav a:hover {
  color: var(--ink);
}

.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom: 2px solid var(--ink);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle,
.nav-toggle {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--ink);
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.theme-toggle:hover,
.nav-toggle:hover {
  background: var(--ink);
  color: var(--paper);
}

/* moon shows in light mode, sun in dark */
.theme-toggle .icon-sun {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

.nav-toggle {
  display: none;
}

.nav-toggle .icon-close {
  display: none;
}

.nav-toggle.open .icon-close {
  display: block;
}

.nav-toggle.open .icon-menu {
  display: none;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(4rem, 9vw, 7.5rem) 0 clamp(3rem, 6vw, 5rem);
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 880px;
}

.hero .label {
  margin-bottom: 1.5rem;
}

/* Oversized outlined ampersand — brand motif */
.big-amp {
  position: absolute;
  right: -4rem;
  top: -5rem;
  z-index: 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(18rem, 36vw, 32rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--line);
  pointer-events: none;
  user-select: none;
}

.hero-sub {
  padding: clamp(3.5rem, 7vw, 5.5rem) 0 clamp(2.5rem, 5vw, 4rem);
}

.hero-sub h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
}

/* ---------- Stat row ---------- */

.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  margin-top: clamp(2.5rem, 5vw, 4rem);
}

.stat {
  padding: 1.5rem 1.5rem 1.5rem 0;
  border-left: 1px solid var(--line);
  padding-left: 1.5rem;
}

.stat:first-child {
  border-left: 0;
  padding-left: 0;
}

.stat-num {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 0.4rem;
}

/* ---------- Ticker ---------- */

.ticker {
  overflow: hidden;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  padding: 0.85rem 0;
}

.ticker-track {
  display: flex;
  gap: 0;
  width: max-content;
  animation: ticker 36s linear infinite;
}

.ticker-track span {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  white-space: nowrap;
  padding-right: 3.5rem;
}

.ticker-track span::after {
  content: "·";
  color: var(--accent);
  margin-left: 3.5rem;
}

@keyframes ticker {
  to {
    transform: translateX(-50%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .ticker-track {
    animation: none;
  }
}

/* ---------- Sections ---------- */

.section {
  padding: clamp(3.5rem, 7vw, 6rem) 0;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 1.25rem;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

.section-head .num {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.3rem;
  color: var(--accent);
}

.section-head h2 {
  margin: 0;
}

.section-head .label {
  margin-left: auto;
  text-align: right;
}

/* ---------- Index rows (services as a table of contents) ---------- */

.index-list {
  border-top: 1px solid var(--line-strong);
}

.index-row {
  display: grid;
  grid-template-columns: 4.5rem 1.1fr 1.6fr auto;
  gap: 1.5rem;
  align-items: baseline;
  padding: 1.9rem 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left 0.2s ease;
}

.index-list .index-row:last-child {
  border-bottom: 1px solid var(--line-strong);
}

a.index-row:hover {
  padding-left: 0.75rem;
}

a.index-row:hover .row-arrow {
  color: var(--accent);
}

.row-num {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--muted);
}

.row-title {
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.row-body {
  color: var(--muted);
  margin: 0;
}

.row-meta {
  display: block;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 0.75rem;
}

.row-arrow {
  font-size: 1.4rem;
  line-height: 1;
  transition: color 0.15s ease;
}

/* ---------- Split (editorial two-column) ---------- */

.split {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.split-sticky {
  position: sticky;
  top: 100px;
}

.split p {
  color: var(--muted);
}

.split h2 {
  color: var(--ink);
}

/* ---------- Point list (numbered arguments) ---------- */

.point-list li {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 1.25rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
}

.point-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.point-list .num {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--accent);
  font-size: 1.1rem;
}

.point-list h3 {
  margin-bottom: 0.4rem;
}

.point-list p {
  color: var(--muted);
  margin: 0;
}

/* ---------- Spec list (definition table) ---------- */

.spec-list {
  border: 1px solid var(--line-strong);
  padding: 0 1.75rem;
}

.spec-list div {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}

.spec-list div:last-child {
  border-bottom: 0;
}

.spec-list dt {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  align-self: center;
}

.spec-list dd {
  margin: 0;
  font-weight: 500;
}

/* ---------- Steps ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.step {
  padding: 1.75rem 1.5rem 1.75rem 0;
  border-left: 1px solid var(--line);
  padding-left: 1.5rem;
}

.step:first-child {
  border-left: 0;
  padding-left: 0;
}

.step-num {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 2rem;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.9rem;
}

.step h3 {
  font-size: 1.02rem;
  margin-bottom: 0.4rem;
}

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

/* ---------- Check list ---------- */

.check-list li {
  position: relative;
  padding: 0.55rem 0 0.55rem 1.6rem;
  color: var(--muted);
}

.check-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ---------- Inverted CTA block ---------- */

.invert {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(3.5rem, 7vw, 6rem) 0;
}

.invert .label {
  display: block;
  margin-bottom: 1.5rem;
}

.invert .label,
.invert p {
  color: color-mix(in srgb, var(--paper) 72%, var(--ink));
}

.invert h2 {
  color: var(--paper);
  max-width: 22ch;
}

.invert .btn {
  border-color: var(--paper);
  color: var(--paper);
}

.invert .btn:hover {
  background: var(--paper);
  color: var(--ink);
}

/* ---------- Aside note ---------- */

.aside-note {
  border-left: 2px solid var(--ink);
  padding: 0.35rem 0 0.35rem 1.25rem;
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 70ch;
}

/* ---------- Videos ---------- */

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem clamp(1.5rem, 3vw, 2.5rem);
}

.video {
  border-top: 1px solid var(--line-strong);
  padding-top: 1.25rem;
}

.video-frame {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  display: block;
  background: #000;
  margin-top: 1rem;
}

.video h3 {
  margin-bottom: 0.35rem;
}

.video p {
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---------- Forms ---------- */

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
}

.field-full {
  grid-column: 1 / -1;
}

.field label {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.field .req {
  color: var(--accent);
}

input,
select,
textarea {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  padding: 0.85rem 1rem;
}

textarea {
  min-height: 160px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--ink);
  outline-offset: 0;
}

.form-status {
  color: var(--accent);
  font-size: 0.95rem;
  min-height: 1.4em;
  margin-top: 0.9rem;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line-strong);
  padding-top: clamp(2.5rem, 5vw, 4rem);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.footer-col h3 {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.1rem;
}

.footer-col li {
  margin-bottom: 0.6rem;
  font-size: 0.95rem;
}

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

.footer-mark {
  font-size: clamp(5rem, 17vw, 13rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 0.95;
  margin-top: clamp(2rem, 5vw, 3.5rem);
  border-bottom: 1px solid var(--line);
}

.footer-mark span {
  display: block;
  font-size: clamp(0.8rem, 2.4vw, 1.6rem);
  font-weight: 600;
  letter-spacing: 0.52em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0.5rem 0 1.5rem;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 2rem;
  padding: 1.4rem 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.footer-bottom p {
  margin: 0;
}

/* ---------- 404 ---------- */

.error-wrap {
  min-height: 55vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 5rem 0;
}

.error-code {
  font-size: clamp(6rem, 18vw, 11rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
}

/* ---------- Responsive ---------- */

@media (max-width: 960px) {
  .nav-toggle {
    display: grid;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: calc(-1 * clamp(1.25rem, 4vw, 3rem));
    right: calc(-1 * clamp(1.25rem, 4vw, 3rem));
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line-strong);
    padding: 0 clamp(1.25rem, 4vw, 3rem) 1rem;
  }

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

  .site-nav a {
    padding: 1rem 0;
    border-top: 1px solid var(--line);
    font-size: 0.8rem;
  }

  .site-nav a[aria-current="page"] {
    border-bottom: 0;
    color: var(--accent);
  }

  .split {
    grid-template-columns: 1fr;
  }

  .split-sticky {
    position: static;
  }

  .steps {
    grid-template-columns: 1fr 1fr;
  }

  .step {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--line);
  }

  .step:first-child,
  .step:nth-child(2) {
    border-top: 0;
  }

  .stat-row {
    grid-template-columns: 1fr 1fr;
  }

  .stat {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--line);
  }

  .stat:first-child,
  .stat:nth-child(2) {
    border-top: 0;
  }

  .index-row {
    grid-template-columns: 3rem 1fr auto;
  }

  .index-row .row-body {
    grid-column: 2 / 3;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .video-grid {
    grid-template-columns: 1fr;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .index-row {
    grid-template-columns: 1fr auto;
    gap: 0.5rem 1rem;
  }

  .row-num {
    grid-column: 1 / -1;
  }

  .index-row .row-body {
    grid-column: 1 / 2;
  }

  .spec-list div {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .section-head {
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
  }

  .section-head .label {
    margin-left: 0;
    text-align: left;
  }
}

@media (max-width: 520px) {
  .steps {
    grid-template-columns: 1fr;
  }

  .step:nth-child(2) {
    border-top: 1px solid var(--line);
  }

  .stat-row {
    grid-template-columns: 1fr;
  }

  .stat:nth-child(2) {
    border-top: 1px solid var(--line);
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}