/* ─────────────────────────────────────────────
   RESET & BASE
───────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: #f4f4f4;
  color: #1a1a1a;
  font-family: 'JetBrains Mono', monospace;
  padding: 32px 40px;
  min-height: 100vh;
}

/* ─────────────────────────────────────────────
   SPEC SHEET CONTAINER
───────────────────────────────────────────── */
.spec-sheet {
  max-width: 1280px;
  margin: 0 auto;
  border: 1px solid #ccc;
}

/* ─────────────────────────────────────────────
   GRID
───────────────────────────────────────────── */
.grid-row {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  align-items: center;
}

.col-2  { grid-column: span 2; }
.col-3  { grid-column: span 3; }
.col-6  { grid-column: span 6; }
.col-8  { grid-column: span 8; }
.col-12 { grid-column: span 12; }

/* ─────────────────────────────────────────────
   BORDERS / RULES
───────────────────────────────────────────── */
.border-bottom { border-bottom: 1px solid #ccc; }
.border-top    { border-top:    1px solid #ccc; }
.border-right  { border-right:  1px solid #ccc; }
.border-left   { border-left:   1px solid #ccc; }

/* ─────────────────────────────────────────────
   HEADER & SUB-HEADER
───────────────────────────────────────────── */
header.grid-row,
.subheader {
  padding: 10px 16px;
}

header.grid-row {
  padding: 14px 16px;
}

.meta {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: #888;
}

.title-center {
  text-align: center;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: #1a1a1a;
}

.text-right  { text-align: right; }
.text-center { text-align: center; }

.subheader .col-3,
.subheader .col-6 {
  padding: 6px 0;
}

/* ─────────────────────────────────────────────
   MAIN CONTENT ROW
───────────────────────────────────────────── */
.main-content {
  align-items: stretch;
}

/* ─────────────────────────────────────────────
   LEFT: NAV COLUMN
───────────────────────────────────────────── */
.nav-col {
  display: flex;
  flex-direction: column;
  padding: 0;
}

.nav-btn {
  display: grid;
  grid-template-columns: 14px 26px 1fr;
  align-items: start;
  column-gap: 8px;
  background: none;
  border: none;
  border-bottom: 1px solid #e4e4e4;
  padding: 18px 16px;
  cursor: pointer;
  text-align: left;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: #999;
  letter-spacing: 0.06em;
  line-height: 1;
  transition: background-color 0.1s, color 0.1s;
  width: 100%;
}

.nav-btn:hover {
  background-color: #ececec;
  color: #1a1a1a;
}

.nav-btn.active {
  color: #1a1a1a;
  background-color: #efefef;
}

.btn-indicator {
  font-size: 0.55rem;
  margin-top: 3px;
  color: #ccc;
  line-height: 1;
}

.nav-btn.active .btn-indicator { color: #1a1a1a; }

.btn-index {
  font-size: 0.62rem;
  color: #bbb;
  margin-top: 1px;
}

.nav-btn.active .btn-index { color: #777; }

.btn-label {
  font-size: 0.7rem;
  font-weight: 400;
  line-height: 1.7;
}

.nav-btn.active .btn-label { font-weight: 700; }

.arabic {
  font-size: 0.82rem;
  letter-spacing: 0.01em;
  direction: rtl;
  display: inline-block;
}

.nav-status {
  margin-top: auto;
  padding: 14px 16px;
  font-size: 0.58rem;
  color: #bbb;
  letter-spacing: 0.1em;
  border-top: 1px solid #e4e4e4;
}

/* ─────────────────────────────────────────────
   CENTER: CANVAS COLUMN
───────────────────────────────────────────── */
.canvas-col {
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #f4f4f4;
  overflow: hidden;
}

/* Force p5 canvas to fill the column */
.canvas-col canvas {
  display: block !important;
  width: 100% !important;
  height: auto !important;
  aspect-ratio: 1 / 1;
}

/* ─────────────────────────────────────────────
   RIGHT: DATA OUTPUT COLUMN
───────────────────────────────────────────── */
.data-col {
  display: flex;
  flex-direction: column;
  padding: 0;
}

.data-output {
  flex: 1;
  padding: 20px 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  line-height: 1.9;
  letter-spacing: 0.04em;
  color: #1a1a1a;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 300px;
}

/* Blinking block cursor appended after content */
.data-output::after {
  content: '▮';
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

.data-meta {
  padding: 12px 16px;
  border-top: 1px solid #e4e4e4;
  font-size: 0.58rem;
  color: #aaa;
  letter-spacing: 0.1em;
  line-height: 2;
}

/* ─────────────────────────────────────────────
   DATA OUTPUT — LINKS & INLINE ELEMENTS
───────────────────────────────────────────── */

/* Links typed by the typewriter */
.data-output a {
  color: inherit;
  font-family: inherit;
  text-decoration: none;
  border-bottom: 1px dashed currentColor;
  transition: background-color 0.12s, color 0.12s, border-color 0.12s;
}

.data-output a:hover {
  background-color: #1a1a1a;
  color: #f4f4f4;
  border-bottom-color: transparent;
  cursor: crosshair;
  padding: 0 2px;
}

/* Arabic output inherits Noto Sans Arabic on links too */
.data-output.lang-ar a {
  font-family: 'Noto Sans Arabic', sans-serif;
}

/* Inline status badge */
.status-active {
  font-weight: 700;
  letter-spacing: 0.08em;
}

/* Dimmed code-comment lines (lines starting with //) */
.data-output .comment {
  color: #aaa;
  font-style: italic;
}

/* ─────────────────────────────────────────────
   LANGUAGE SWITCHER
───────────────────────────────────────────── */
.lang-switcher {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 5px;
}

.lang-prefix {
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  color: #bbb;
}

.lang-sep {
  font-size: 0.55rem;
  color: #ccc;
  letter-spacing: 0;
}

.lang-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: #bbb;
  padding: 2px 3px;
  transition: color 0.1s;
  line-height: 1;
}

.lang-btn::before {
  content: '□ ';
  font-size: 0.48rem;
  vertical-align: middle;
}

.lang-btn:hover { color: #555; }

.lang-btn.active {
  color: #1a1a1a;
  font-weight: 700;
}

.lang-btn.active::before { content: '■ '; }

/* ─────────────────────────────────────────────
   ARABIC / RTL DATA OUTPUT
───────────────────────────────────────────── */

/* Applied to #data-output when AR is active */
.data-output.lang-ar {
  font-family: 'Noto Sans Arabic', sans-serif;
  font-size: 0.95rem;   /* Noto Sans Arabic runs slightly large vs JetBrains Mono */
  line-height: 2.1;
  direction: rtl;
  text-align: right;
  letter-spacing: 0;    /* Arabic text doesn't use letter-spacing */
}

/* Applied to #data-meta-wrap when AR is active */
.data-meta.lang-ar-meta {
  direction: rtl;
  text-align: right;
  font-family: 'Noto Sans Arabic', sans-serif;
  font-size: 0.58rem;
  letter-spacing: 0;
}

/* ─────────────────────────────────────────────
   FOOTER
───────────────────────────────────────────── */
footer.grid-row {
  padding: 12px 16px;
}

/* Header role — wraps gracefully at col-2 width */
#header-role {
  line-height: 1.5;
}

/* Uplink monitor strip in footer */
.uplink-monitor {
  padding: 5px 0;
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  color: #555;
  border-top: 1px solid #e4e4e4;
  animation: uplink-pulse 2s ease-in-out infinite;
  text-align: center;
}

.uplink-monitor.lang-ar-status {
  direction: rtl;
  font-family: 'Noto Sans Arabic', sans-serif;
  letter-spacing: 0;
  font-size: 0.62rem;
}

@keyframes uplink-pulse {
  0%, 100% { opacity: 1;    }
  50%       { opacity: 0.35; }
}

/* Data probe tooltip drawn in p5 — no CSS needed (canvas element) */

.erase-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  color: #bbb;
  padding: 0;
  transition: color 0.15s;
}

.erase-btn:hover { color: #1a1a1a; }

/* ─────────────────────────────────────────────
   REMOTE STATUS BAR
───────────────────────────────────────────── */
.status-bar {
  padding: 5px 16px;
  background-color: #f0f0f0;
}

.status-line {
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  color: #555;
}

/* The blinking [SIGNAL_ACTIVE] part */
.signal-blink {
  animation: blink 1.6s step-end infinite;
}

/* Arabic variant: applied via JS */
.status-line.lang-ar-status {
  direction: rtl;
  text-align: right;
  font-family: 'Noto Sans Arabic', sans-serif;
  letter-spacing: 0;
  font-size: 0.62rem;
}

/* ─────────────────────────────────────────────
   SCANNING SIGNAL LINE
───────────────────────────────────────────── */
#scan-line {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent 0%,
    rgba(26, 26, 26, 0.1) 15%,
    rgba(26, 26, 26, 0.2) 50%,
    rgba(26, 26, 26, 0.1) 85%,
    transparent 100%
  );
  pointer-events: none;
  z-index: 400;
  animation: scan-sweep 13s linear infinite;
  animation-delay: 4s; /* pause before first sweep */
}

@keyframes scan-sweep {
  /* Sweep down over the first 50% of the cycle */
  0%    { transform: translateY(0);     opacity: 0; }
  4%    { opacity: 1; }
  46%   { opacity: 1; }
  50%   { transform: translateY(100vh); opacity: 0; }
  /* Snap back to top silently for the second 50% (pause) */
  50.1% { transform: translateY(0);     opacity: 0; }
  100%  { transform: translateY(0);     opacity: 0; }
}

/* ─────────────────────────────────────────────
   EASTER EGGS
───────────────────────────────────────────── */

/* Full-page ballpoint pen overlay — sits above everything,
   pointer-events: none so links and canvas clicks pass through */
#pen-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 500;
}

/* ASCII rain particles */
.rain-char {
  position: fixed;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: #1a1a1a;
  pointer-events: none;
  user-select: none;
  z-index: 490;
  will-change: top;
}