/* =========================================================
   PORTFOLIO SYSTEM
   Visual direction: engineering field notebook / technical dossier.
   No external font or framework dependencies.
   ========================================================= */

:root {
  --paper: #f2efe5;
  --paper-deep: #e5e0d2;
  --ink: #171b22;
  --ink-soft: #363c46;
  --muted: #6c716f;
  --rule: rgba(23, 27, 34, 0.22);
  --rule-strong: rgba(23, 27, 34, 0.62);
  --signal: #ee4f2a;
  --signal-soft: rgba(238, 79, 42, 0.12);
  --blueprint: #2349c3;
  --blueprint-soft: rgba(35, 73, 195, 0.08);
  --success: #0b7358;
  --warning: #a15800;
  --header-height: 70px;
  --rail-width: 78px;
  --content-max: 1320px;
  --gutter: clamp(1.1rem, 3vw, 3.25rem);
  --serif: Iowan Old Style, Baskerville, "Times New Roman", Times, serif;
  --sans: "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

html[data-theme="night"] {
  --paper: #12171d;
  --paper-deep: #1b222a;
  --ink: #e9e5da;
  --ink-soft: #c3c0b8;
  --muted: #858c92;
  --rule: rgba(233, 229, 218, 0.18);
  --rule-strong: rgba(233, 229, 218, 0.54);
  --signal: #ff6b43;
  --signal-soft: rgba(255, 107, 67, 0.13);
  --blueprint: #7f9cff;
  --blueprint-soft: rgba(127, 156, 255, 0.1);
  --success: #65d9b2;
  --warning: #f0b75f;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.55;
  transition:
    background-color 220ms ease,
    color 220ms ease;
}

body.menu-open {
  overflow: hidden;
}

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

button {
  color: inherit;
  font: inherit;
}

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

.skip-link {
  position: fixed;
  top: 0.8rem;
  left: 0.8rem;
  z-index: 1000;
  padding: 0.65rem 0.8rem;
  transform: translateY(-160%);
  border: 1px solid var(--ink);
  background: var(--paper);
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
}

.skip-link:focus {
  transform: translateY(0);
}

.page-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--rule) 1px, transparent 1px),
    linear-gradient(to bottom, var(--rule) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.13;
}

.page-grid::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--paper);
  mask-image: linear-gradient(to bottom, transparent 0, #000 24rem, #000 100%);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: var(--header-height);
  display: grid;
  grid-template-columns: minmax(260px, 1fr) auto auto;
  align-items: center;
  gap: 2rem;
  padding: 0 var(--gutter) 0 calc(var(--rail-width) + var(--gutter));
  border-bottom: 1px solid var(--rule-strong);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(12px);
}

.header-id {
  min-width: 0;
  display: flex;
  align-items: baseline;
  gap: 1.2rem;
}

.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  font-family: var(--mono);
  font-size: 0.79rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.wordmark-index {
  color: var(--signal);
}

.header-role {
  overflow: hidden;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 1.45rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.desktop-nav a {
  position: relative;
  padding: 0.4rem 0;
}

.desktop-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left;
  background: var(--signal);
  transition: transform 160ms ease;
}

.desktop-nav a:hover::after,
.desktop-nav a:focus-visible::after,
.desktop-nav a.is-active::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.plain-button {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--rule);
  border-radius: 0;
  background: transparent;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
}

.plain-button:hover,
.plain-button:focus-visible {
  border-color: var(--signal);
  color: var(--signal);
}

.mobile-menu-toggle {
  display: none;
}

.mobile-nav {
  display: none;
}

.margin-rail {
  position: fixed;
  top: var(--header-height);
  bottom: 0;
  left: 0;
  z-index: 90;
  width: var(--rail-width);
  display: flex;
  flex-direction: column;
  align-items: center;
  border-right: 1px solid var(--rule-strong);
  background: var(--paper);
}

.rail-title,
.rail-year {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.rail-title {
  margin-top: 1.2rem;
  color: var(--signal);
}

.rail-year {
  margin-top: auto;
  margin-bottom: 1.2rem;
  color: var(--muted);
}

.margin-rail ol {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.margin-rail a {
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  border: 1px solid var(--rule);
  color: transparent;
  font-size: 0;
}

.margin-rail a::before {
  content: counter(list-item, decimal-leading-zero);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.58rem;
}

.margin-rail a:hover,
.margin-rail a:focus-visible,
.margin-rail a.is-active {
  border-color: var(--signal);
  background: var(--signal);
}

.margin-rail a:hover::before,
.margin-rail a:focus-visible::before,
.margin-rail a.is-active::before {
  color: #fff;
}

main,
.site-footer {
  margin-left: var(--rail-width);
}

.hero,
.case-file,
.work-log,
.capabilities,
.fit,
.contact {
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.hero {
  min-height: calc(100vh - var(--header-height));
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding-top: 1.1rem;
  padding-bottom: 1.1rem;
}

.hero-kicker {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--rule);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(320px, 0.65fr);
  gap: clamp(3rem, 8vw, 8rem);
  align-items: center;
  padding: clamp(4rem, 10vh, 8rem) 0;
}

.section-code {
  margin: 0 0 1.4rem;
  color: var(--signal);
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.hero h1,
.case-intro h2,
.capability-intro h2,
.fit-statement h2,
.contact-content h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.045em;
}

.hero h1 {
  max-width: 970px;
  font-size: clamp(3.25rem, 7.2vw, 7.6rem);
  line-height: 0.88;
}

.hero h1 em {
  display: block;
  margin-top: 0.1em;
  color: var(--blueprint);
  font-style: italic;
}

.hero-deck {
  max-width: 760px;
  margin: 2.2rem 0 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.8vw, 1.25rem);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.signal-link {
  min-width: 220px;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem;
  border-top: 2px solid var(--signal);
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.signal-link:hover,
.signal-link:focus-visible {
  background: var(--signal);
  color: #fff;
}

.signal-link-muted {
  border-top-color: var(--blueprint);
}

.signal-link-muted:hover,
.signal-link-muted:focus-visible {
  background: var(--blueprint);
}

[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.43;
}

.hero-spec {
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}

.spec-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--rule);
}

.spec-row span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.66rem;
  text-transform: uppercase;
}

.spec-row strong {
  text-align: right;
  font-family: var(--mono);
  font-size: 0.72rem;
}

.spec-note {
  padding: 1rem 0;
}

.spec-note > span {
  color: var(--signal);
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 800;
  text-transform: uppercase;
}

.spec-note p {
  margin: 0.45rem 0 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.hero-footer {
  display: flex;
  overflow: hidden;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
}

.hero-footer span {
  flex: 1;
  padding: 0.55rem 0.9rem;
  border-right: 1px solid var(--rule);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.61rem;
  text-align: center;
}

.section-rule {
  padding-top: clamp(5.5rem, 10vw, 10rem);
  padding-bottom: clamp(5.5rem, 10vw, 10rem);
  border-top: 1px solid var(--rule-strong);
}

.section-marker {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: clamp(2.8rem, 6vw, 5.5rem);
}

.section-marker .section-code {
  margin: 0;
}

.section-marker > span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  text-align: right;
  text-transform: uppercase;
}

.case-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.7fr);
  gap: clamp(3rem, 8vw, 8rem);
  align-items: end;
}

.case-intro h2,
.capability-intro h2,
.fit-statement h2,
.contact-content h2 {
  font-size: clamp(2.7rem, 5.4vw, 5.8rem);
  line-height: 0.95;
}

.case-intro p,
.capability-intro p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.03rem;
}

.system-plate {
  margin-top: 4rem;
  border: 1px solid var(--rule-strong);
  background:
    linear-gradient(var(--blueprint-soft), var(--blueprint-soft)),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 23px,
      var(--rule) 24px
    );
}

.plate-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--rule-strong);
  font-family: var(--mono);
  font-size: 0.63rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.plate-header span:last-child {
  color: var(--muted);
}

.topology {
  min-height: 390px;
  display: grid;
  grid-template-columns: 170px minmax(110px, 1fr) 190px minmax(110px, 1fr) minmax(360px, 1.8fr);
  align-items: center;
  gap: 0.7rem;
  padding: clamp(1.2rem, 4vw, 3rem);
  overflow-x: auto;
}

.topology-column {
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.node {
  position: relative;
  min-width: 130px;
  padding: 0.8rem;
  border: 1px solid var(--rule-strong);
  background: var(--paper);
  box-shadow: 5px 5px 0 var(--blueprint-soft);
}

.node-heavy {
  border-width: 2px;
}

.node-index {
  position: absolute;
  top: 0.35rem;
  right: 0.45rem;
  color: var(--signal);
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 800;
}

.node strong,
.node small {
  display: block;
  font-family: var(--mono);
}

.node strong {
  padding-right: 1rem;
  font-size: 0.72rem;
}

.node small {
  margin-top: 0.3rem;
  color: var(--muted);
  font-size: 0.6rem;
}

.wire {
  position: relative;
  background: var(--blueprint);
}

.wire::before,
.wire::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  border: 1px solid var(--blueprint);
  background: var(--paper);
}

.wire-horizontal {
  width: 100%;
  height: 1px;
}

.wire-horizontal::before {
  left: 0;
  top: -3px;
}

.wire-horizontal::after {
  right: 0;
  top: -3px;
}

.wire-vertical {
  width: 1px;
  height: 55px;
  margin-inline: auto;
}

.wire-vertical::before {
  top: 0;
  left: -3px;
}

.wire-vertical::after {
  bottom: 0;
  left: -3px;
}

.wire-group {
  min-width: 110px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.56rem;
  text-align: center;
  text-transform: uppercase;
}

.wire-group span {
  display: block;
  margin-bottom: 0.55rem;
}

.cluster-box {
  min-width: 360px;
  padding: 1rem;
  border: 2px solid var(--blueprint);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
}

.cluster-label {
  display: block;
  margin-bottom: 0.8rem;
  color: var(--blueprint);
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 800;
}

.cluster-nodes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
}

.cluster-nodes .node {
  min-width: 0;
  box-shadow: none;
}

.storage-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 0.65rem;
  border: 1px solid var(--rule-strong);
}

.storage-row span {
  padding: 0.55rem 0.25rem;
  font-family: var(--mono);
  font-size: 0.55rem;
  text-align: center;
}

.storage-row span + span {
  border-left: 1px solid var(--rule-strong);
}

.data-plane {
  margin-top: 0.65rem;
  padding: 0.7rem;
  border: 1px dashed var(--rule-strong);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.58rem;
  text-align: center;
}

.case-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2rem, 5vw, 5rem);
  margin-top: 4rem;
}

.case-column {
  border-top: 3px solid var(--ink);
}

.column-label {
  margin: 0;
  padding-top: 0.8rem;
  color: var(--signal);
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.case-column h3 {
  max-width: 520px;
  margin: 1.2rem 0 2rem;
  font-family: var(--serif);
  font-size: clamp(1.9rem, 3vw, 3rem);
  font-weight: 400;
  line-height: 1;
}

.ruled-list {
  margin: 0;
  padding: 0;
  border-bottom: 1px solid var(--rule);
  list-style: none;
}

.ruled-list li {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 0.8rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--rule);
}

.ruled-list li > span {
  color: var(--blueprint);
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 800;
}

.ruled-list p {
  margin: 0;
  color: var(--ink-soft);
}

.trace-panel {
  margin-top: 4rem;
  border: 1px solid var(--rule-strong);
  background: #10141a;
  color: #e8e5db;
}

.trace-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.07em;
}

.trace-state {
  color: #ffb86a;
}

.trace-panel pre {
  margin: 0;
  padding: clamp(1rem, 3vw, 1.8rem);
  overflow-x: auto;
  font-family: var(--mono);
  font-size: clamp(0.72rem, 1.3vw, 0.9rem);
  line-height: 1.85;
}

.trace-muted {
  color: #74808e;
}

.trace-ok {
  color: #6ee7b7;
}

.trace-warn {
  color: #ffb86a;
}

.trace-live {
  color: #8fa8ff;
}

.confidentiality-note {
  max-width: 760px;
  margin: 1.1rem 0 0 auto;
  padding-left: 1rem;
  border-left: 3px solid var(--signal);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.logbook {
  border-top: 2px solid var(--ink);
}

.log-entry {
  display: grid;
  grid-template-columns: 72px minmax(200px, 0.75fr) minmax(300px, 1.25fr) minmax(160px, 0.6fr) 80px;
  gap: 1.2rem;
  align-items: start;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--rule);
}

.log-index,
.log-title > p,
.log-tech,
.log-status {
  font-family: var(--mono);
}

.log-index {
  color: var(--signal);
  font-size: 0.7rem;
  font-weight: 800;
}

.log-title > p {
  margin: 0 0 0.45rem;
  color: var(--muted);
  font-size: 0.61rem;
  text-transform: uppercase;
}

.log-title h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 400;
  line-height: 1.05;
}

.log-description p {
  margin: 0;
  color: var(--ink-soft);
}

.log-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.log-tech span {
  padding: 0.2rem 0.35rem;
  border: 1px solid var(--rule);
  font-size: 0.56rem;
}

.log-status {
  color: var(--blueprint);
  font-size: 0.61rem;
  font-weight: 800;
  text-align: right;
  text-transform: uppercase;
}

.capability-intro {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 0.6fr);
  gap: clamp(3rem, 8vw, 8rem);
  align-items: end;
  margin-bottom: 4rem;
}

.capability-matrix {
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}

.matrix-row {
  display: grid;
  grid-template-columns: minmax(180px, 0.7fr) minmax(300px, 1.7fr) minmax(150px, 0.55fr);
  gap: 1.5rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--rule);
}

.matrix-row:last-child {
  border-bottom: 0;
}

.matrix-head {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.61rem;
  text-transform: uppercase;
}

.matrix-row strong {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 400;
}

.matrix-row > span:nth-child(2) {
  color: var(--ink-soft);
}

.level {
  align-self: start;
  justify-self: end;
  padding: 0.25rem 0.4rem;
  border: 1px solid var(--rule-strong);
  font-family: var(--mono);
  font-size: 0.58rem;
  text-align: center;
  text-transform: uppercase;
}

.level-strong {
  border-color: var(--success);
  color: var(--success);
}

.level-depth {
  border-color: var(--blueprint);
  color: var(--blueprint);
}

.tool-band {
  display: flex;
  flex-wrap: wrap;
  margin-top: 3rem;
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}

.tool-band span {
  flex: 1 0 auto;
  padding: 0.65rem 0.8rem;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.6rem;
  text-align: center;
}

.fit-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(360px, 1.15fr);
  gap: clamp(3rem, 8vw, 8rem);
}

.fit-statement {
  position: sticky;
  top: calc(var(--header-height) + 2rem);
  align-self: start;
}

.fit-list {
  border-top: 2px solid var(--ink);
}

.fit-list article {
  display: grid;
  grid-template-columns: 40px 180px 1fr;
  gap: 1.2rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--rule);
}

.fit-list article > span {
  color: var(--signal);
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 800;
}

.fit-list h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1.05;
}

.fit-list p {
  margin: 0;
  color: var(--ink-soft);
}

.contact {
  position: relative;
  min-height: 620px;
  display: grid;
  grid-template-columns: 1fr minmax(180px, 0.35fr);
  gap: 4rem;
  align-items: center;
  overflow: hidden;
}

.contact::before {
  content: "";
  position: absolute;
  top: 15%;
  right: 4%;
  width: 300px;
  height: 300px;
  border: 1px solid var(--rule);
  border-radius: 50%;
  pointer-events: none;
}

.contact::after {
  content: "";
  position: absolute;
  top: calc(15% + 50px);
  right: calc(4% + 50px);
  width: 200px;
  height: 200px;
  border: 1px dashed var(--rule-strong);
  border-radius: 50%;
  pointer-events: none;
}

.contact-content {
  position: relative;
  z-index: 2;
  max-width: 850px;
}

.contact-content h2 {
  max-width: 850px;
}

.contact-content > p:not(.section-code) {
  max-width: 680px;
  margin: 1.5rem 0 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.contact-actions {
  margin-top: 2.5rem;
}

.contact-primary {
  display: flex;
  max-width: 680px;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
  border-top: 2px solid var(--signal);
  border-bottom: 1px solid var(--rule);
  color: var(--signal);
  font-family: var(--mono);
  font-size: clamp(1rem, 2vw, 1.4rem);
  overflow-wrap: anywhere;
}

.contact-primary:hover,
.contact-primary:focus-visible {
  padding-inline: 0.8rem;
  background: var(--signal);
  color: #fff;
}

.contact-secondary {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.contact-secondary a,
.copy-email {
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--rule);
  background: transparent;
  font-family: var(--mono);
  font-size: 0.65rem;
  text-transform: uppercase;
}

.contact-secondary a:hover,
.contact-secondary a:focus-visible,
.copy-email:hover,
.copy-email:focus-visible {
  border-color: var(--blueprint);
  color: var(--blueprint);
}

.copy-email {
  margin-top: 0.7rem;
  cursor: pointer;
}

.contact-stamp {
  position: relative;
  z-index: 2;
  width: 180px;
  height: 180px;
  display: grid;
  place-content: center;
  justify-self: end;
  border: 4px double var(--signal);
  border-radius: 50%;
  color: var(--signal);
  text-align: center;
  transform: rotate(-8deg);
}

.contact-stamp span {
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: 0.06em;
}

.contact-stamp small {
  display: block;
  max-width: 120px;
  margin-top: 0.4rem;
  font-family: var(--mono);
  font-size: 0.52rem;
}

.site-footer {
  max-width: calc(var(--content-max) + var(--rail-width));
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-right: auto;
  margin-left: var(--rail-width);
  padding: 1.2rem var(--gutter);
  border-top: 1px solid var(--rule-strong);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.62rem;
  text-transform: uppercase;
}

.copy-toast {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 300;
  padding: 0.75rem 0.9rem;
  transform: translateY(150%);
  border: 1px solid var(--rule-strong);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.66rem;
  transition: transform 180ms ease;
}

.copy-toast.is-visible {
  transform: translateY(0);
}

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

/* =========================================================
   Responsive
   ========================================================= */

@media (max-width: 1120px) {
  .desktop-nav {
    display: none;
  }

  .mobile-menu-toggle {
    display: inline-flex;
  }

  .mobile-nav {
    position: absolute;
    top: var(--header-height);
    right: 0;
    left: var(--rail-width);
    display: none;
    grid-template-columns: repeat(2, 1fr);
    border-bottom: 1px solid var(--rule-strong);
    background: var(--paper);
  }

  .mobile-nav.is-open {
    display: grid;
  }

  .mobile-nav a {
    padding: 1rem var(--gutter);
    border-right: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    font-family: var(--mono);
    font-size: 0.68rem;
    text-transform: uppercase;
  }

  .topology {
    grid-template-columns: 160px 100px 180px 100px 360px;
  }

  .log-entry {
    grid-template-columns: 60px minmax(180px, 0.8fr) minmax(260px, 1.2fr) 110px;
  }

  .log-tech {
    grid-column: 2 / 4;
  }

  .log-status {
    grid-column: 4;
    grid-row: 1;
  }
}

@media (max-width: 880px) {
  :root {
    --rail-width: 46px;
  }

  .site-header {
    padding-left: calc(var(--rail-width) + var(--gutter));
  }

  .header-role {
    display: none;
  }

  .theme-label {
    display: none;
  }

  .hero-layout,
  .case-intro,
  .capability-intro,
  .fit-layout {
    grid-template-columns: 1fr;
  }

  .hero-spec {
    max-width: 640px;
  }

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

  .fit-statement {
    position: static;
  }

  .matrix-row {
    grid-template-columns: 180px 1fr;
  }

  .matrix-row > :last-child {
    grid-column: 2;
    justify-self: start;
  }

  .matrix-head > :last-child {
    display: none;
  }

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

  .contact-stamp {
    justify-self: start;
    order: -1;
    width: 130px;
    height: 130px;
  }

  .contact::before,
  .contact::after {
    display: none;
  }
}

@media (max-width: 680px) {
  :root {
    --header-height: 62px;
  }

  .site-header {
    grid-template-columns: 1fr auto;
    gap: 0.6rem;
  }

  .wordmark {
    max-width: 180px;
  }

  .header-actions {
    gap: 0.4rem;
  }

  .plain-button {
    padding: 0.45rem;
  }

  .mobile-nav {
    left: 0;
    grid-template-columns: 1fr;
  }

  .margin-rail {
    display: none;
  }

  main,
  .site-footer {
    margin-left: 0;
  }

  .site-header {
    padding-left: var(--gutter);
  }

  .hero h1 {
    font-size: clamp(3.4rem, 18vw, 5.7rem);
  }

  .hero-layout {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  .hero-kicker span:nth-child(2) {
    display: none;
  }

  .hero-footer {
    overflow-x: auto;
  }

  .hero-footer span {
    min-width: 120px;
  }

  .section-marker {
    flex-direction: column;
    gap: 0.5rem;
  }

  .section-marker > span {
    text-align: left;
  }

  .system-plate {
    margin-right: calc(var(--gutter) * -1);
    margin-left: calc(var(--gutter) * -1);
    border-right: 0;
    border-left: 0;
  }

  .log-entry {
    grid-template-columns: 50px 1fr;
    gap: 0.8rem;
  }

  .log-title,
  .log-description,
  .log-tech,
  .log-status {
    grid-column: 2;
  }

  .log-status {
    grid-row: auto;
    justify-self: start;
    text-align: left;
  }

  .matrix-row,
  .matrix-head {
    grid-template-columns: 1fr;
    gap: 0.55rem;
  }

  .matrix-row > :last-child {
    grid-column: 1;
  }

  .matrix-head {
    display: none;
  }

  .fit-list article {
    grid-template-columns: 32px 1fr;
  }

  .fit-list p {
    grid-column: 2;
  }

  .contact-primary {
    font-size: 0.9rem;
  }

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

@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;
  }
}