/* ==========================================================================
   The Terminal — kkarasavvas.com
   Gruvbox-flavored, all-mono. Three-state theming: OS preference applies
   unless the user explicitly chose a theme (data-theme set before paint).
   ========================================================================== */

:root {
  --bg: #fbf1c7;
  --bg-soft: #f2e5bc;
  --ink: #3c3836;
  --muted: #928374;
  --rule: #d5c4a1;
  --green: #79740e;
  --orange: #af3a03;
  --aqua: #427b58;
  --yellow: #b57614;

  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;

  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #1d2021;
  --bg-soft: #282828;
  --ink: #ebdbb2;
  --muted: #928374;
  --rule: #3c3836;
  --green: #b8bb26;
  --orange: #fe8019;
  --aqua: #8ec07c;
  --yellow: #fabd2f;
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1d2021;
    --bg-soft: #282828;
    --ink: #ebdbb2;
    --muted: #928374;
    --rule: #3c3836;
    --green: #b8bb26;
    --orange: #fe8019;
    --aqua: #8ec07c;
    --yellow: #fabd2f;
    color-scheme: dark;
  }
}

/* Base ------------------------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  line-height: 1.7;
  transition: background-color 0.2s ease, color 0.2s ease;
}

a {
  color: var(--orange);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

::selection {
  background: var(--yellow);
  color: var(--bg);
}

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

.container {
  max-width: 50rem;
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.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;
}

/* Status bar (header) ---------------------------------------------------- */

.site-header {
  border-bottom: 1px solid var(--rule);
  background: var(--bg-soft);
  font-size: 0.8125rem;
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding-block: 0.6rem;
}

.wordmark {
  color: var(--green);
  font-weight: 600;
  margin-right: auto;
  white-space: nowrap;
}

.wordmark:hover {
  text-decoration: none;
  color: var(--orange);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

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

.site-nav a::before {
  content: "[";
  color: var(--rule);
}

.site-nav a::after {
  content: "]";
  color: var(--rule);
}

.site-nav a:hover {
  color: var(--orange);
  text-decoration: none;
}

.theme-toggle {
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--muted);
  font: inherit;
  line-height: 1;
  padding: 0.3rem 0.45rem;
  border-radius: 4px;
  cursor: pointer;
}

.theme-toggle:hover {
  color: var(--orange);
  border-color: var(--orange);
}

/* Terminal session (hero) ------------------------------------------------ */

.hero {
  padding-block: 3.5rem 1rem;
}

.cmd {
  margin: 0 0 0.25rem;
  color: var(--muted);
}

.cmd .sh {
  color: var(--green);
  font-weight: 600;
}

.cmd .bin {
  color: var(--ink);
}

.hero h1 {
  font-weight: 600;
  font-size: clamp(1.6rem, 5.2vw, 2.75rem);
  letter-spacing: 0.01em;
  line-height: 1.2;
  margin: 0.25rem 0;
}

.hero .tagline {
  color: var(--aqua);
  margin: 0 0 2rem;
}

.hero .intro {
  max-width: 42rem;
  margin: 0.25rem 0 2rem;
}

.cursor {
  display: inline-block;
  width: 0.6em;
  height: 1.1em;
  vertical-align: text-bottom;
  background: var(--green);
  animation: blink 1.1s steps(1) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

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

section {
  padding-block: 1.75rem;
}

/* Panes (project windows) ------------------------------------------------ */

.panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 1.25rem;
}

.pane {
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--bg-soft);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.pane.wide {
  grid-column: 1 / -1;
}

.pane-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.9rem;
  border-bottom: 1px solid var(--rule);
  font-size: 0.8125rem;
}

.pane-title .dots {
  color: var(--rule);
  letter-spacing: 0.1em;
  line-height: 1;
}

.pane-title .name {
  font-weight: 600;
  color: var(--ink);
}

.pane-title .meta {
  margin-left: auto;
  color: var(--muted);
  text-align: right;
}

.pane img {
  display: block;
  width: 100%;
  aspect-ratio: 5 / 3;
  object-fit: cover;
  object-position: top;
  border-bottom: 1px solid var(--rule);
}

.pane-body {
  padding: 0.9rem 0.9rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  flex: 1;
}

.pane-body p {
  margin: 0;
  font-size: 0.875rem;
}

.pane-body .links {
  margin-top: auto;
  font-size: 0.8125rem;
}

.pane-body .links a {
  white-space: nowrap;
}

.pane-body .links a::before {
  content: "[";
  color: var(--muted);
}

.pane-body .links a::after {
  content: "]";
  color: var(--muted);
}

.pane-body .links a + a {
  margin-left: 0.5rem;
}

.pane .note {
  color: var(--yellow);
  font-style: italic;
}

/* Code pane (python-bitcoin-utils) */

.term-code {
  margin: 0;
  padding: 0.9rem;
  overflow-x: auto;
  font-size: 0.8125rem;
  line-height: 1.65;
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
}

.term-code .c { color: var(--muted); font-style: italic; }
.term-code .k { color: var(--orange); }
.term-code .s { color: var(--green); }
.term-code .f { color: var(--aqua); }

/* Terminal output lists (about, pointers) -------------------------------- */

.about p {
  max-width: 42rem;
}

.pointer {
  margin-top: 1.5rem;
}

.pointer .arrow {
  color: var(--muted);
}

/* Ledger rows (blog index, tag and category pages) ----------------------- */

.ledger {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
}

.ledger > li {
  display: grid;
  grid-template-columns: 12ch 1fr;
  gap: 1.25rem;
  padding-block: 0.7rem;
  border-top: 1px dashed var(--rule);
}

.ledger > li:last-child {
  border-bottom: 1px dashed var(--rule);
}

.ledger .meta {
  font-size: 0.8125rem;
  color: var(--muted);
}

.ledger .meta span {
  display: block;
}

.ledger .entry h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin: 0;
}

.ledger .entry h3 a {
  color: var(--ink);
}

.ledger .entry h3 a:hover {
  color: var(--orange);
  text-decoration: none;
}

/* Prose (blog posts, archive, 404) --------------------------------------- */

.prose {
  padding-block: 0.5rem 3rem;
  max-width: 46rem;
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  font-weight: 600;
  line-height: 1.3;
  margin: 2rem 0 0.75rem;
}

.prose h2 { font-size: 1.15rem; color: var(--yellow); }
.prose h2::before { content: "## "; color: var(--muted); }
.prose h3 { font-size: 1rem; color: var(--aqua); }
.prose h3::before { content: "### "; color: var(--muted); }
.prose h4 { font-size: 0.9375rem; }

.prose img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.prose pre {
  background: var(--bg-soft);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.8125rem;
  line-height: 1.6;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.prose :not(pre) > code {
  background: var(--bg-soft);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 0.05em 0.3em;
}

.prose blockquote {
  margin: 1.25rem 0;
  padding-left: 1rem;
  border-left: 2px solid var(--green);
  color: var(--muted);
}

.prose table {
  border-collapse: collapse;
  display: block;
  overflow-x: auto;
}

.prose th,
.prose td {
  border: 1px solid var(--rule);
  padding: 0.35rem 0.7rem;
  font-size: 0.875rem;
}

.prose hr {
  border: 0;
  border-top: 1px dashed var(--rule);
  margin: 2rem 0;
}

/* Post header ------------------------------------------------------------ */

.post-header {
  padding-block: 2.5rem 0;
}

.post-header h1 {
  font-weight: 600;
  font-size: clamp(1.3rem, 4vw, 1.9rem);
  line-height: 1.3;
  margin: 0 0 0.5rem;
}

.post-header .meta {
  font-size: 0.8125rem;
  color: var(--muted);
}

.post-header .meta a {
  color: var(--muted);
}

.post-header .meta a:hover {
  color: var(--orange);
}

/* Status line (footer) --------------------------------------------------- */

.site-footer {
  margin-top: 3rem;
  border-top: 1px solid var(--rule);
  background: var(--bg-soft);
  font-size: 0.8125rem;
  color: var(--muted);
}

.site-footer .container {
  padding-block: 1.5rem 2rem;
}

.site-footer .section-label {
  margin: 0 0 0.75rem;
  color: var(--green);
  font-weight: 600;
}

.site-footer .section-label::before {
  content: "$ ";
}

.site-footer .social {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  margin-bottom: 1rem;
}

.site-footer .social a::before {
  content: "[";
  color: var(--rule);
}

.site-footer .social a::after {
  content: "]";
  color: var(--rule);
}

.site-footer .copyright {
  margin: 0;
}

/* Motion ----------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }

  .cursor {
    opacity: 1;
  }
}

/* Small screens ---------------------------------------------------------- */

@media (max-width: 44rem) {
  .panes {
    grid-template-columns: 1fr;
  }

  .ledger > li {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }

  .ledger .meta span {
    display: inline;
  }

  .ledger .meta span + span::before {
    content: " / ";
  }

  .hero {
    padding-block: 2.5rem 0.5rem;
  }

  .site-header .container {
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
  }
}