/* =========================================================================
   backend-development.net
   Palette grounded in security tooling: deep-slate IDE background, amber-CRT
   primary, Ghidra-teal secondary. Type: IBM Plex Mono (display/code) + Sans.
   ========================================================================= */

:root {
  --bg:         #0c1018;
  --bg-alt:     #0f141d;
  --surface:    #141a25;
  --surface-2:  #1a2130;
  --border:     #232c3d;
  --border-2:   #2d3850;

  --text:       #d6dbe4;
  --text-dim:   #8893a6;
  --text-faint: #5b6577;

  --amber:      #ffb02e;   /* primary accent — CRT phosphor */
  --amber-dim:  #c98a26;
  --teal:       #4ec9b0;   /* secondary — tags, links-in-prose */
  --teal-dim:   #3a9c87;
  --red:        #f0635b;   /* destructive / warnings only */

  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;

  --measure: 70ch;
  --wrap: 880px;
  --radius: 6px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 50% -200px, rgba(255,176,46,0.05), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 24px;
}

a { color: var(--amber); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.comment { color: var(--text-faint); font-family: var(--mono); }
.mono-faint { font-family: var(--mono); color: var(--text-faint); font-size: 0.85rem; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--amber); color: #000; padding: 8px 14px; z-index: 100;
  font-family: var(--mono);
}
.skip-link:focus { left: 12px; top: 12px; }

/* ---- Top bar ----------------------------------------------------------- */

.topbar {
  border-bottom: 1px solid var(--border);
  background: rgba(12,16,24,0.85);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 50;
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 60px; flex-wrap: wrap;
}
.brand {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--text);
  display: inline-flex; align-items: center; gap: 8px;
  white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.prompt-user { color: var(--teal); }
.prompt-at, .prompt-path { color: var(--text-faint); }
.prompt-host { color: var(--amber); }
.brand-cmd { color: var(--text-dim); }
.cursor {
  display: inline-block; width: 8px; height: 1.05em;
  background: var(--amber); margin-left: 2px; transform: translateY(2px);
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.nav { display: flex; align-items: center; gap: 18px; font-family: var(--mono); font-size: 0.85rem; }
.nav a { color: var(--text-dim); }
.nav a:hover { color: var(--amber); text-decoration: none; }

.inline-form { display: inline; margin: 0; }
.linkbtn {
  background: none; border: none; padding: 0; cursor: pointer;
  font-family: var(--mono); font-size: 0.85rem; color: var(--text-dim);
}
.linkbtn:hover { color: var(--amber); }
.linkbtn-danger:hover { color: var(--red); }

/* ---- Flashes ----------------------------------------------------------- */

.flashes { margin-top: 18px; }
.flash {
  font-family: var(--mono); font-size: 0.85rem;
  padding: 10px 14px; border-radius: var(--radius);
  border: 1px solid var(--border-2); margin-bottom: 8px;
}
.flash::before { content: "› "; color: var(--text-faint); }
.flash-ok    { border-color: var(--teal-dim); color: var(--teal); background: rgba(78,201,176,0.06); }
.flash-error { border-color: var(--red); color: var(--red); background: rgba(240,99,91,0.06); }

main { flex: 1 0 auto; padding-block: 40px 64px; }

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

.hero { margin-bottom: 36px; }
.hero-title {
  font-family: var(--mono); font-weight: 700;
  font-size: clamp(1.7rem, 4.5vw, 2.5rem);
  letter-spacing: -0.5px; margin: 0 0 8px;
  color: var(--text);
}
.hero-title::before { content: "// "; color: var(--amber); }
.hero-tagline { color: var(--text-dim); margin: 0; max-width: 60ch; }

.filter-note { font-family: var(--mono); font-size: 0.85rem; color: var(--text-dim); margin-top: 16px; }
.clear-filter { margin-left: 8px; }

/* ---- Listing (hexdump-flavored directory of posts) --------------------- */

.listing { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--border); }
.entry {
  border-bottom: 1px solid var(--border);
  padding: 22px 0;
  position: relative;
}
.entry-link {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 18px;
  color: inherit;
}
.entry-link:hover { text-decoration: none; }
.entry-gutter {
  font-family: var(--mono); font-size: 0.8rem; color: var(--text-faint);
  padding-top: 4px; letter-spacing: 0.5px;
  border-right: 1px solid var(--border); 
}
.entry:hover .entry-gutter { color: var(--amber); }
.entry-body { min-width: 0; }
.entry-meta {
  font-family: var(--mono); font-size: 0.78rem; color: var(--text-faint);
  display: flex; align-items: center; gap: 10px; margin-bottom: 5px;
}
.entry-title {
  display: block;
  font-family: var(--mono); font-weight: 600;
  font-size: 1.18rem; color: var(--text); line-height: 1.35;
  margin-bottom: 6px;
}
.entry:hover .entry-title { color: var(--amber); }
.entry-excerpt { display: block; color: var(--text-dim); font-size: 0.95rem; }
.entry-tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0 0 calc(5.5rem + 18px); }

/* chips */
.chip {
  font-family: var(--mono); font-size: 0.72rem;
  color: var(--teal); border: 1px solid var(--border-2);
  padding: 2px 8px; border-radius: 100px; background: var(--surface);
  white-space: nowrap;
}
.chip:hover { border-color: var(--teal-dim); text-decoration: none; }
.chip-active { color: var(--amber); border-color: var(--amber-dim); }

.badge-draft {
  font-family: var(--mono); font-size: 0.68rem; color: var(--red);
  border: 1px solid var(--red); border-radius: 100px; padding: 1px 7px;
  text-transform: uppercase; letter-spacing: 0.5px;
}

.entry-views { color: var(--teal-dim); white-space: nowrap; }
.entry-views::before { content: "· "; color: var(--border-2); }

/* ---- Empty / error states --------------------------------------------- */

.empty { padding: 48px 0; }
.empty-line { font-family: var(--mono); margin: 0 0 8px; }
.empty-msg { color: var(--text-dim); margin: 0; }
.error-page { text-align: left; }
.error-code { font-family: var(--mono); color: var(--amber); font-size: 1.1rem; margin: 6px 0 14px; }

/* ---- Article ----------------------------------------------------------- */

.article { max-width: var(--measure); }
.article-head { margin-bottom: 30px; padding-bottom: 22px; border-bottom: 1px solid var(--border); }
.article-path { margin: 0 0 12px; font-size: 0.85rem; }
.article-title {
  font-family: var(--mono); font-weight: 700;
  font-size: clamp(1.6rem, 4vw, 2.3rem); line-height: 1.2;
  letter-spacing: -0.5px; margin: 0 0 14px; color: var(--text);
}
.article-meta {
  font-family: var(--mono); font-size: 0.82rem; color: var(--text-faint);
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.article-meta a { color: var(--text-dim); }
.article-meta a:hover { color: var(--amber); }
.sep { color: var(--border-2); }
.article-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }

.back { margin-top: 48px; font-family: var(--mono); font-size: 0.85rem; }

/* ---- Prose (rendered markdown) ---------------------------------------- */

.prose { color: var(--text); font-size: 1.02rem; }
.prose > *:first-child { margin-top: 0; }
.prose p { margin: 0 0 1.15em; }
.prose h2, .prose h3, .prose h4 {
  font-family: var(--mono); color: var(--text);
  line-height: 1.3; margin: 1.9em 0 0.6em; scroll-margin-top: 80px;
}
.prose h2 { font-size: 1.5rem; padding-bottom: 0.3em; border-bottom: 1px solid var(--border); }
.prose h2::before { content: "## "; color: var(--amber); }
.prose h3 { font-size: 1.22rem; }
.prose h3::before { content: "### "; color: var(--amber-dim); }
.prose h4 { font-size: 1.05rem; color: var(--text-dim); }
.prose a { color: var(--teal); text-decoration: underline; text-underline-offset: 2px; text-decoration-color: var(--teal-dim); }
.prose a:hover { color: var(--amber); text-decoration-color: var(--amber); }
.prose strong { color: #fff; font-weight: 600; }
.prose ul, .prose ol { margin: 0 0 1.15em; padding-left: 1.4em; }
.prose li { margin: 0.35em 0; }
.prose ul li::marker { color: var(--amber); }
.prose ol li::marker { color: var(--amber); font-family: var(--mono); }
.prose blockquote {
  margin: 1.4em 0; padding: 0.4em 1.1em;
  border-left: 3px solid var(--amber-dim);
  background: var(--surface); color: var(--text-dim); border-radius: 0 var(--radius) var(--radius) 0;
}
.prose blockquote p:last-child { margin-bottom: 0; }
.prose hr { border: none; border-top: 1px solid var(--border); margin: 2.4em 0; }
.prose img { max-width: 100%; height: auto; border-radius: var(--radius); border: 1px solid var(--border); }

/* inline code */
.prose code {
  font-family: var(--mono); font-size: 0.88em;
  background: var(--surface-2); color: var(--amber);
  padding: 0.12em 0.4em; border-radius: 4px; border: 1px solid var(--border);
}

/* code blocks (pygments wraps in .highlight) */
.prose pre, .preview-pane pre { margin: 1.5em 0; }
.highlight {
  background: var(--bg-alt) !important;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow-x: auto;
  position: relative;
}
.highlight pre {
  margin: 0; padding: 16px 18px;
  font-family: var(--mono); font-size: 0.86rem; line-height: 1.55;
  background: transparent !important;
}
.highlight code { background: none; border: none; padding: 0; color: inherit; font-size: inherit; }

/* tables in prose */
.prose table { width: 100%; border-collapse: collapse; margin: 1.5em 0; font-size: 0.92rem; }
.prose th, .prose td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
.prose th { background: var(--surface); font-family: var(--mono); color: var(--text); }
.prose tr:nth-child(even) td { background: var(--surface); }

/* ---- Forms / auth / editor -------------------------------------------- */

.auth { max-width: 380px; margin: 24px auto; }
.auth-prompt { margin: 0 0 10px; font-size: 0.85rem; }
.auth-title { font-family: var(--mono); font-size: 1.5rem; margin: 0 0 24px; }
.auth-title::before { content: "$ "; color: var(--amber); }

.form { display: flex; flex-direction: column; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field-label { font-family: var(--mono); font-size: 0.82rem; color: var(--text-dim); }
.field-hint { color: var(--text-faint); font-weight: 400; }

input[type="text"], input[type="password"], textarea {
  width: 100%; font-family: var(--mono); font-size: 0.92rem;
  background: var(--bg-alt); color: var(--text);
  border: 1px solid var(--border-2); border-radius: var(--radius);
  padding: 11px 13px; line-height: 1.5;
}
input:focus, textarea:focus {
  outline: none; border-color: var(--amber);
  box-shadow: 0 0 0 3px rgba(255,176,46,0.12);
}
textarea { resize: vertical; min-height: 280px; tab-size: 2; }
::placeholder { color: var(--text-faint); }

.checkbox { display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 0.88rem; color: var(--text-dim); cursor: pointer; }
.checkbox input { width: 16px; height: 16px; accent-color: var(--amber); }

.btn {
  font-family: var(--mono); font-size: 0.88rem; font-weight: 600;
  padding: 10px 20px; border-radius: var(--radius); cursor: pointer;
  border: 1px solid transparent; display: inline-block;
}
.btn-primary { background: var(--amber); color: #15100a; border-color: var(--amber); }
.btn-primary:hover { background: #ffbe54; text-decoration: none; }
.btn-ghost { background: transparent; color: var(--text-dim); border-color: var(--border-2); }
.btn-ghost:hover { color: var(--text); border-color: var(--text-faint); text-decoration: none; }
.form-actions { display: flex; gap: 12px; align-items: center; }

/* editor */
.editor-head, .admin-head { margin-bottom: 26px; }
.editor-title, .admin-title { font-family: var(--mono); font-size: 1.6rem; margin: 6px 0 0; }
.editor-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.preview-pane {
  margin-top: 14px; padding: 20px;
  border: 1px dashed var(--border-2); border-radius: var(--radius);
  background: var(--surface);
}

/* admin */
.admin-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; margin-top: 8px; }
.admin-table th {
  text-align: left; font-family: var(--mono); font-size: 0.75rem;
  text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-faint);
  padding: 10px 12px; border-bottom: 1px solid var(--border-2);
}
.admin-table td { padding: 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.admin-table tr:hover td { background: var(--surface); }
.col-id { width: 4.5rem; }
.col-status { width: 6rem; font-family: var(--mono); font-size: 0.82rem; color: var(--text-dim); white-space: nowrap; }
.col-date { width: 7rem; }
.col-views { width: 5rem; font-family: var(--mono); font-size: 0.82rem; color: var(--text-faint); }
.col-actions { text-align: right; white-space: nowrap; }
.col-actions .linkbtn { margin-left: 14px; }
.dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; margin-right: 7px; vertical-align: middle; }
.dot-live { background: var(--teal); box-shadow: 0 0 6px var(--teal); }
.dot-draft { background: var(--text-faint); }

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

.footer { border-top: 1px solid var(--border); padding-block: 22px; margin-top: auto; }
.footer-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 0.78rem; }

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

@media (max-width: 620px) {
  .wrap { padding-inline: 18px; }
  .entry-link { grid-template-columns: 1fr; gap: 6px; }
  .entry-gutter { border-right: none; padding-top: 0; }
  .entry-tags { margin-left: 0; }
  .nav { gap: 14px; }
  .brand-cmd, .cursor { display: none; }
  .col-date, .col-id, .col-views { display: none; }
  .footer-inner { flex-direction: column; gap: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; }
  * { scroll-behavior: auto; }
}

/* keyboard focus visibility */
:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }