:root {
  color-scheme: dark;
  --screen: oklch(0.075 0.012 145);
  --screen-raised: oklch(0.105 0.018 145);
  --phosphor: oklch(0.83 0.22 142);
  --phosphor-bright: oklch(0.91 0.18 142);
  --phosphor-dim: oklch(0.62 0.145 142);
  --phosphor-faint: oklch(0.35 0.075 142);
  --warning: oklch(0.86 0.19 102);
  --error: oklch(0.72 0.2 28);
  --shadow: color-mix(in oklch, var(--phosphor) 35%, transparent);
  --terminal-font: "Courier New", Courier, ui-monospace, monospace;
  --page-pad: clamp(0.85rem, 2.8vw, 2.2rem);
  --content-width: 70ch;
}

body.amber-mode {
  --phosphor: oklch(0.82 0.17 78);
  --phosphor-bright: oklch(0.9 0.14 82);
  --phosphor-dim: oklch(0.63 0.13 76);
  --phosphor-faint: oklch(0.37 0.075 73);
  --warning: oklch(0.84 0.18 105);
}

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

html {
  min-width: 320px;
  background: var(--screen);
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--screen);
  color: var(--phosphor);
  font-family: var(--terminal-font);
  font-size: clamp(0.98rem, 0.92rem + 0.22vw, 1.08rem);
  line-height: 1.62;
  text-shadow: 0 0 0.24rem var(--shadow);
}

body.effects-on {
  background-image: radial-gradient(ellipse at center, var(--screen-raised) 0%, var(--screen) 68%);
}

.crt-effects {
  display: none;
}

body.effects-on .crt-effects {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: block;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 2px,
    oklch(0.02 0 0 / 0.2) 3px
  );
  box-shadow: inset 0 0 10rem oklch(0.01 0 0 / 0.82);
  opacity: 0.54;
  pointer-events: none;
}

body.readable-mode,
body.readable-mode * {
  text-shadow: none;
}

body.readable-mode .crt-effects {
  display: none;
}

a {
  color: var(--phosphor-bright);
  text-decoration-color: var(--phosphor-dim);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--warning);
  text-decoration-color: currentColor;
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

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

::selection {
  background: var(--phosphor);
  color: var(--screen);
  text-shadow: none;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.5rem 0.75rem;
  background: var(--phosphor);
  color: var(--screen);
  transform: translateY(-180%);
  text-shadow: none;
}

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

.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;
}

.terminal-chassis {
  width: min(100%, 76rem);
  min-height: 100vh;
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 2.4rem) var(--page-pad) 1rem;
}

.terminal-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem 2rem;
  align-items: baseline;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--phosphor-dim);
  font-size: 0.78rem;
  letter-spacing: 0.045em;
}

.terminal-header p {
  margin: 0;
  color: var(--phosphor-dim);
}

.terminal-id {
  color: var(--phosphor-bright);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.terminal-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.8rem;
  justify-content: flex-end;
}

.terminal-controls button {
  min-height: 2rem;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--phosphor-dim);
  cursor: pointer;
  font-size: 0.72rem;
}

.terminal-controls button:hover,
.terminal-controls button[aria-pressed="true"] {
  color: var(--warning);
}

.terminal-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem clamp(0.65rem, 2vw, 1.4rem);
  padding: 0.7rem 0;
  border-bottom: 1px dashed var(--phosphor-faint);
}

.terminal-nav a {
  display: inline-flex;
  min-height: 2.3rem;
  align-items: center;
  color: var(--phosphor);
  font-size: 0.83rem;
  font-weight: 700;
  text-decoration: none;
}

.terminal-nav a:hover,
.terminal-nav a[aria-current="page"] {
  color: var(--warning);
}

.terminal-nav a[aria-current="page"]::after {
  content: "_";
  animation: blink 1s steps(2, jump-none) infinite;
}

.terminal-status {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding: 0.48rem 0;
  color: var(--phosphor-dim);
  font-size: 0.72rem;
}

.terminal-status span:first-child {
  color: var(--phosphor-bright);
}

.terminal-output {
  min-height: 61vh;
  padding: clamp(2rem, 6vw, 4.6rem) 0 clamp(2.5rem, 6vw, 4.8rem);
}

.boot-record {
  display: grid;
  max-width: var(--content-width);
  margin-bottom: clamp(2.5rem, 6vw, 4.2rem);
  color: var(--phosphor-dim);
  font-size: 0.76rem;
  line-height: 1.75;
}

.js .terminal-screen:not(.is-active) {
  display: none;
}

.terminal-screen {
  max-width: var(--content-width);
}

.terminal-screen h1,
.terminal-screen h2,
.blog-terminal h1,
.article-terminal h1 {
  max-width: 28ch;
  margin: 0.35rem 0 1.5rem;
  color: var(--phosphor-bright);
  font-size: clamp(1.55rem, 1.18rem + 1.6vw, 2.65rem);
  line-height: 1.15;
  letter-spacing: 0.025em;
}

.terminal-screen h3 {
  margin: 0.2rem 0 0.45rem;
  color: var(--phosphor-bright);
  font-size: 1rem;
}

.terminal-screen p {
  margin: 1rem 0;
}

.command-echo,
.path-line {
  color: var(--warning);
  font-size: 0.82rem;
}

.terminal-lede {
  color: var(--phosphor-bright);
  font-size: clamp(1.08rem, 1rem + 0.34vw, 1.3rem);
  line-height: 1.55;
}

.terminal-block {
  margin: clamp(2rem, 5vw, 3.2rem) 0;
  padding: 1rem 0;
  border-top: 1px solid var(--phosphor-dim);
  border-bottom: 1px solid var(--phosphor-dim);
}

.output-label {
  color: var(--warning);
  font-weight: 700;
}

.terminal-list {
  padding: 0;
  margin: 0.8rem 0;
  list-style: none;
}

.terminal-list li {
  display: grid;
  grid-template-columns: 2.7rem 1fr;
  gap: 0.5rem;
  margin: 0.55rem 0;
}

.terminal-list li > span {
  color: var(--phosphor-dim);
}

.terminal-choice {
  margin-top: 2rem !important;
  color: var(--phosphor-dim);
}

.terminal-choice > span {
  color: var(--warning);
}

.terminal-record {
  margin: 2rem 0;
}

.terminal-record div {
  display: grid;
  grid-template-columns: minmax(10rem, 0.35fr) 1fr;
  gap: 1rem;
  padding: 0.72rem 0;
  border-top: 1px dotted var(--phosphor-faint);
}

.terminal-record div:last-child {
  border-bottom: 1px dotted var(--phosphor-faint);
}

.terminal-record dt {
  color: var(--warning);
  font-weight: 700;
}

.terminal-record dd {
  margin: 0;
}

.work-file {
  padding: 1.35rem 0 1.6rem;
  border-top: 1px dotted var(--phosphor-faint);
}

.work-file:last-of-type {
  border-bottom: 1px dotted var(--phosphor-faint);
}

.work-file > p:first-child {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin: 0 0 0.55rem;
  color: var(--phosphor-dim);
  font-size: 0.76rem;
}

.work-file > p:first-child span {
  color: var(--warning);
  font-weight: 700;
}

.work-file > p:last-child {
  margin: 0;
}

.contact-command {
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: 1rem;
  padding: 0.7rem 0;
  margin: 0 !important;
  border-top: 1px dotted var(--phosphor-faint);
}

.contact-command:last-of-type {
  border-bottom: 1px dotted var(--phosphor-faint);
}

.contact-command span {
  color: var(--warning);
}

.terminal-cursor-line {
  margin: 3rem 0 0;
  color: var(--phosphor-dim);
  font-size: 0.8rem;
}

.terminal-output.is-receiving .terminal-cursor-line {
  visibility: hidden;
}

.terminal-output [data-transmission-pending] {
  visibility: hidden;
}

.block-cursor,
.receive-cursor {
  display: inline-block;
  width: 0.65em;
  height: 1.1em;
  margin-left: 0.35rem;
  background: var(--phosphor);
  vertical-align: -0.15em;
  animation: blink 1s steps(2, jump-none) infinite;
  box-shadow: 0 0 0.4rem var(--shadow);
}

.receive-cursor {
  margin-left: 0.08em;
}

.terminal-prompt {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.55rem;
  align-items: center;
  padding: 0.72rem 0;
  border-top: 1px solid var(--phosphor-dim);
  border-bottom: 1px solid var(--phosphor-dim);
}

.terminal-prompt label {
  color: var(--warning);
  white-space: nowrap;
}

.terminal-prompt input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--phosphor-bright);
  caret-color: var(--phosphor-bright);
}

.terminal-prompt input::placeholder {
  color: var(--phosphor-faint);
}

.terminal-prompt button {
  min-height: 2.35rem;
  padding: 0 0.55rem;
  border: 1px solid var(--phosphor-dim);
  background: transparent;
  cursor: pointer;
  font-size: 0.72rem;
}

.terminal-prompt button:hover {
  border-color: var(--warning);
  color: var(--warning);
}

.command-response {
  min-height: 1.7rem;
  margin: 0;
  padding: 0.45rem 0;
  color: var(--warning);
  font-size: 0.78rem;
}

.terminal-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding-top: 0.7rem;
  color: var(--phosphor-dim);
  font-size: 0.68rem;
}

/* Field notes directory */

.blog-terminal,
.article-terminal {
  max-width: var(--content-width);
  min-height: 68vh;
  padding: clamp(2.5rem, 7vw, 5rem) 0;
}

.directory-summary {
  margin: 1.5rem 0 2.5rem;
  color: var(--phosphor-bright);
}

.directory-list {
  padding: 0;
  margin: 2.5rem 0;
  border-top: 1px solid var(--phosphor-dim);
  list-style: none;
}

.directory-entry {
  display: grid;
  grid-template-columns: 7rem 6rem 1fr;
  gap: 0.75rem 1rem;
  padding: 1.15rem 0;
  border-bottom: 1px dotted var(--phosphor-faint);
}

.directory-entry time,
.directory-entry .file-data {
  color: var(--phosphor-dim);
  font-size: 0.78rem;
}

.directory-entry h2 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.5;
}

.directory-entry p {
  grid-column: 3;
  margin: 0.35rem 0 0;
  color: var(--phosphor-dim);
  font-size: 0.9rem;
}

.directory-footer {
  color: var(--phosphor-dim);
  font-size: 0.82rem;
}

.directory-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin-top: 2rem;
}

/* Article text file */

.article-terminal {
  max-width: 76ch;
}

.article-head {
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--phosphor-dim);
}

.article-head .article-dek {
  color: var(--phosphor-bright);
  font-size: clamp(1.05rem, 1rem + 0.3vw, 1.25rem);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
  color: var(--phosphor-dim);
  font-size: 0.78rem;
}

.prose {
  padding: clamp(2rem, 5vw, 3.5rem) 0;
}

.prose p,
.prose li {
  max-width: 70ch;
}

.prose p {
  margin: 1.15rem 0;
}

.prose h2 {
  margin: 3.2rem 0 1.2rem;
  color: var(--warning);
  font-size: clamp(1.1rem, 1rem + 0.45vw, 1.4rem);
  line-height: 1.35;
}

.prose h2::before {
  content: ":: ";
  color: var(--phosphor-dim);
}

.prose ul {
  padding-left: 1.3rem;
}

.prose li {
  margin: 0.65rem 0;
}

.prose blockquote {
  margin: 2rem 0;
  padding: 1rem 0;
  border-top: 1px solid var(--phosphor-dim);
  border-bottom: 1px solid var(--phosphor-dim);
  color: var(--phosphor-bright);
}

.prose blockquote p::before {
  content: "> ";
  color: var(--warning);
}

.terminal-example {
  overflow-x: auto;
  margin: 2rem 0;
  padding: 1rem;
  border: 1px solid var(--phosphor-dim);
  background: oklch(0.055 0.01 145);
  color: var(--phosphor-bright);
  white-space: pre-wrap;
}

.terminal-example code {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
}

.article-end {
  padding-top: 1.5rem;
  border-top: 1px solid var(--phosphor-dim);
}

@keyframes blink {
  0%, 45% { opacity: 1; }
  46%, 100% { opacity: 0; }
}

@media (max-width: 760px) {
  .terminal-header {
    grid-template-columns: 1fr;
    gap: 0.3rem;
  }

  .terminal-controls {
    justify-content: flex-start;
  }

  .terminal-nav {
    gap: 0 0.8rem;
  }

  .terminal-nav a {
    font-size: 0.76rem;
  }

  .terminal-status span:last-child {
    display: none;
  }

  .terminal-record div,
  .contact-command,
  .directory-entry {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }

  .directory-entry p {
    grid-column: 1;
  }

  .terminal-prompt {
    grid-template-columns: auto 1fr;
  }

  .terminal-prompt button {
    grid-column: 1 / -1;
    width: 100%;
  }

  .terminal-footer span:last-child {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media print {
  :root,
  body.amber-mode {
    --screen: oklch(0.985 0.005 100);
    --phosphor: oklch(0.2 0.02 145);
    --phosphor-bright: oklch(0.13 0.02 145);
    --phosphor-dim: oklch(0.35 0.035 145);
    --phosphor-faint: oklch(0.7 0.02 145);
    --warning: oklch(0.35 0.11 60);
  }

  .crt-effects,
  .terminal-controls,
  .terminal-prompt,
  .command-response {
    display: none !important;
  }

  body,
  body * {
    text-shadow: none !important;
  }
}