/* ============================================================
   SYSMON v2.0 — Pixel / Terminal System Monitor Dashboard
   Blocky, monospace, VT100-inspired aesthetic
   ============================================================ */

/* ── Section 0: Pixel Font Embedding ──────────────────────── */

/* Embedded 5×5 pixel font (bitmap) for authentic terminal feel */
@font-face {
  font-family: 'PixelTerm';
  src: url('data:font/woff2;charset=utf-8;base64,d09GMgABAAAAAAKwAA4AAAAABWAAAAaRAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAP0ZGVE0cYBoEBgQgHwA2ATQHYAIQYQIcATQBAQgSAAEAOw==') format('woff2');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

/* ── Section 1: CSS Custom Properties ─────────────────────── */
:root {
  /* Core palette — terminal phosphor green on black */
  --color-bg: #050505;
  --color-bg-panel: #0a0a0a;
  --color-bg-panel-hover: #0f0f0f;
  --color-surface: #0d0d0d;
  --color-border: #1a1a1a;
  --color-border-glow: #00ff4133;

  /* Terminal phosphor colors */
  --color-green: #00ff41;
  --color-green-dim: #00cc33;
  --color-green-glow: #00ff4166;
  --color-green-dark: #003b00;
  --color-cyan: #00e5ff;
  --color-cyan-dim: #00b8cc;
  --color-cyan-glow: #00e5ff66;
  --color-cyan-dark: #002b33;
  --color-magenta: #ff00ff;
  --color-magenta-dim: #cc00cc;
  --color-magenta-glow: #ff00ff66;
  --color-magenta-dark: #330033;
  --color-yellow: #ffff00;
  --color-yellow-dim: #cccc00;
  --color-yellow-glow: #ffff0066;
  --color-yellow-dark: #333300;
  --color-red: #ff0040;
  --color-red-dim: #cc0033;
  --color-red-glow: #ff004066;
  --color-red-dark: #330000;
  --color-white: #d0d0d0;
  --color-gray: #555555;
  --color-gray-dim: #2a2a2a;
  --text-muted: var(--color-gray);

  /* Typography — MONOSPACE EVERYWHERE */
  --font-mono: 'Courier New', 'Lucida Console', 'Consolas', 'DejaVu Sans Mono', monospace;
  --font-pixel: 'Courier New', monospace;

  /* Spacing */
  --space-0_5: 0.125rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;

  /* Panel — SHARP EDGES */
  --panel-radius: 0;
  --panel-padding: var(--space-2);
  --panel-border-width: 1px;

  /* Bar — PIXELATED */
  --bar-height: 6px;
  --bar-height-sm: 3px;
  --bar-radius: 0;

  /* Transitions */
  --transition-fast: 100ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 400ms ease;

  /* CRT */
  --crt-scanline-opacity: 0.04;
  --flicker-opacity: 0.015;
}

/* ── Section 2: Reset & Base ─────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 14px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: auto;
}

body {
  font-family: var(--font-mono);
  background-color: var(--color-bg);
  color: var(--color-green);
  line-height: 1.4;
  min-height: 100dvh;
  overflow-x: hidden;
  position: relative;
  /* Force pixelated text rendering for terminal look */
  -webkit-font-smoothing: none;
  -moz-osx-font-smoothing: unset;
  text-rendering: optimizeSpeed;
}

/* ── Section 3: CRT Effects ──────────────────────────────── */

/* Scanlines overlay — slightly more visible for retro feel */
.scanlines {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.15) 2px,
    rgba(0, 0, 0, 0.15) 4px
  );
  animation: scanline-shift 8s linear infinite;
}

@keyframes scanline-shift {
  0% { background-position: 0 0; }
  100% { background-position: 0 4px; }
}

/* CRT curvature vignette — stronger edges */
.crt-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9998;
  background: radial-gradient(
    ellipse at center,
    transparent 50%,
    rgba(0, 0, 0, 0.5) 100%
  );
}

/* Subtle flicker */
.flicker {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9997;
  animation: flicker 0.15s infinite;
  opacity: var(--flicker-opacity);
  background: var(--color-green);
}

@keyframes flicker {
  0%, 100% { opacity: var(--flicker-opacity); }
  50% { opacity: 0; }
}

/* ── Section 4: Accessibility — Reduced Motion ───────────── */
@media (prefers-reduced-motion: reduce) {
  .scanlines,
  .flicker {
    display: none;
  }
  .crt-overlay {
    opacity: 0.3;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── Section 5: ASCII Banner ─────────────────────────────── */
.ascii-banner {
  font-family: var(--font-mono);
  font-size: 0.5rem;
  line-height: 1.2;
  color: var(--color-gray-dim);
  padding: var(--space-1) var(--space-2);
  white-space: pre;
  overflow-x: auto;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-panel);
  letter-spacing: 0.05em;
}

.ascii-banner span {
  color: var(--color-green-dim);
}

/* Hide banner on small screens */
@media (max-width: 700px) {
  .ascii-banner {
    display: none;
  }
}

/* ── Section 6: Terminal Header ──────────────────────────── */
.terminal-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 2px solid var(--color-green);
  box-shadow: 0 0 20px var(--color-green-glow),
              0 2px 0 0 var(--color-green-dark);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-1) var(--space-2);
  max-width: 1600px;
  margin: 0 auto;
}

.header-title {
  font-size: 0.85rem;
  font-weight: bold;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-green);
  text-shadow: 0 0 5px var(--color-green-glow),
               0 0 10px var(--color-green-glow);
}

.header-title .accent {
  color: var(--color-cyan);
  text-shadow: 0 0 5px var(--color-cyan-glow),
               0 0 10px var(--color-cyan-glow);
}

.header-meta {
  font-size: 0.65rem;
  color: var(--color-gray);
  letter-spacing: 0.1em;
}

.header-sep {
  margin: 0 var(--space-1);
  color: var(--color-gray-dim);
}

.header-status {
  color: var(--color-green);
}

.header-status::before {
  content: '';
  display: inline-block;
  width: 5px;
  height: 5px;
  background: var(--color-green);
  /* Square dot — no border-radius */
  border-radius: 0;
  margin-right: 3px;
  vertical-align: middle;
  box-shadow: 0 0 4px var(--color-green-glow);
  animation: status-pulse 2s ease-in-out infinite;
}

.header-clock {
  color: var(--color-cyan);
  text-shadow: 0 0 5px var(--color-cyan-glow);
}

@keyframes status-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.header-bar {
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-green) 0px,
    var(--color-green) 8px,
    transparent 8px,
    transparent 12px
  );
  animation: header-bar-shift 2s linear infinite;
  background-size: 200% 100%;
}

@keyframes header-bar-shift {
  0% { background-position: 0% 0%; }
  100% { background-position: 200% 0%; }
}

/* Blinking cursor */
.blink {
  animation: blink 1s step-end infinite;
}

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

/* ── Section 7: Dashboard Grid ──────────────────────────── */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding: var(--space-2);
  max-width: 1600px;
  margin: 0 auto;
}

/* Mobile landscape / small tablet: 2 columns */
@media (min-width: 560px) {
  .dashboard-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Tablet: 3 columns */
@media (min-width: 860px) {
  .dashboard-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Desktop: 4 columns */
@media (min-width: 1100px) {
  .dashboard-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Wide desktop: 5 columns */
@media (min-width: 1400px) {
  .dashboard-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

/* Wide panels span 2 columns */
.panel--wide {
  grid-column: span 2;
}

/* On 5-col grid, wide panels still span 2 */
@media (min-width: 1400px) {
  .panel--wide {
    grid-column: span 2;
  }
}

/* ── Section 8: Metric Panels — BLOCKY TERMINAL STYLE ────── */
.panel {
  background: var(--color-bg-panel);
  border: var(--panel-border-width) solid var(--color-border);
  /* SHARP EDGES — no border-radius */
  border-radius: 0;
  overflow: visible;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
  position: relative;
  /* Terminal window effect — solid border, no glow gradient on top */
}

/* Remove the gradient top bar — replace with ASCII-style border */
.panel::before {
  display: none;
}

/* Panel bottom accent line */
.panel::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-border);
  transition: background var(--transition-fast);
}

.panel:hover {
  border-color: var(--color-green-dim);
  box-shadow: 0 0 8px var(--color-green-glow),
              inset 0 0 1px var(--color-green-glow);
}

/* Panel accent colors — bottom bar */
.panel--cpu::after { background: var(--color-green-dark); }
.panel--memory::after { background: var(--color-cyan-dark); }
.panel--load::after { background: var(--color-yellow-dark); }
.panel--network::after { background: var(--color-green-dark); }
.panel--disk::after { background: var(--color-cyan-dark); }
.panel--uptime::after { background: var(--color-green-dark); }
.panel--processes::after { background: var(--color-magenta-dark); }

.panel--cpu:hover { border-color: var(--color-green-dim); box-shadow: 0 0 8px var(--color-green-glow), inset 0 0 1px var(--color-green-glow); }
.panel--memory:hover { border-color: var(--color-cyan-dim); box-shadow: 0 0 8px var(--color-cyan-glow), inset 0 0 1px var(--color-cyan-glow); }
.panel--load:hover { border-color: var(--color-yellow-dim); box-shadow: 0 0 8px var(--color-yellow-glow), inset 0 0 1px var(--color-yellow-glow); }
.panel--network:hover { border-color: var(--color-green-dim); box-shadow: 0 0 8px var(--color-green-glow), inset 0 0 1px var(--color-green-glow); }
.panel--disk:hover { border-color: var(--color-cyan-dim); box-shadow: 0 0 8px var(--color-cyan-glow), inset 0 0 1px var(--color-cyan-glow); }
.panel--uptime:hover { border-color: var(--color-green-dim); box-shadow: 0 0 8px var(--color-green-glow), inset 0 0 1px var(--color-green-glow); }
.panel--processes:hover { border-color: var(--color-magenta-dim); box-shadow: 0 0 8px var(--color-magenta-glow), inset 0 0 1px var(--color-magenta-glow); }

/* ── Panel Corners (ASCII box-drawing) ───────────────────── */
.panel-corner {
  position: absolute;
  z-index: 2;
  font-size: 0.6rem;
  line-height: 1;
  color: var(--color-green-dim);
  pointer-events: none;
  font-family: var(--font-mono);
}

.panel-corner--tl { top: -1px; left: 2px; }
.panel-corner--tr { top: -1px; right: 2px; }
.panel-corner--bl { bottom: -1px; left: 2px; }
.panel-corner--br { bottom: -1px; right: 2px; }

/* ── Panel Header ────────────────────────────────────────── */
.panel-header {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

/* Terminal prompt character */
.panel-prompt {
  font-size: 0.6rem;
  color: var(--color-green-dim);
  font-weight: bold;
  flex-shrink: 0;
  margin-right: -1px;
}

.panel-icon {
  font-size: 0.7rem;
  color: var(--color-gray);
  width: 16px;
  text-align: center;
  flex-shrink: 0;
}

.panel-label {
  font-size: 0.6rem;
  font-weight: bold;
  letter-spacing: 0.15em;
  text-transform: lowercase;
  color: var(--color-gray);
  flex: 1;
}

.panel-badge {
  font-size: 0.55rem;
  letter-spacing: 0.1em;
  padding: 1px 4px;
  /* SHARP EDGES */
  border-radius: 0;
  border: 1px solid var(--color-green-dim);
  color: var(--color-green);
  background: rgba(0, 255, 65, 0.05);
  flex-shrink: 0;
}

.panel-badge.warning {
  border-color: var(--color-yellow-dim);
  color: var(--color-yellow);
  background: rgba(255, 255, 0, 0.05);
}

.panel-badge.critical {
  border-color: var(--color-red-dim);
  color: var(--color-red);
  background: rgba(255, 0, 64, 0.05);
}

.panel-body {
  padding: var(--space-2);
}

/* ── Section 9: Metric Value Display ─────────────────────── */
.metric-row {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  margin-bottom: var(--space-1);
}

.metric-value {
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--color-green);
  text-shadow: 0 0 10px var(--color-green-glow);
  line-height: 1;
  /* Pixelated text rendering */
  image-rendering: pixelated;
}

.metric-value--sm {
  font-size: 1.3rem;
}

.metric-value--swap {
  color: var(--color-magenta);
  text-shadow: 0 0 10px var(--color-magenta-glow);
}

.metric-unit {
  font-size: 0.7rem;
  color: var(--color-gray);
}

/* ── Section 10: Progress Bars — PIXELATED ───────────────── */
.bar-container {
  width: 100%;
  height: var(--bar-height);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  /* SHARP EDGES */
  border-radius: 0;
  overflow: hidden;
  margin-bottom: var(--space-2);
  position: relative;
}

.bar-container.bar--sm {
  height: var(--bar-height-sm);
}

.bar-fill {
  height: 100%;
  width: 0%;
  /* SHARP EDGES */
  border-radius: 0;
  transition: width var(--transition-normal);
  position: relative;
  /* Pixelated rendering for blocky fill */
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
}

/* Bar glow — solid block instead of gradient fade */
.bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 3px;
  height: 100%;
  background: rgba(255, 255, 255, 0.5);
}

/* Bar color variants — SOLID BLOCK COLORS, no gradient */
.bar--green {
  background: var(--color-green);
  box-shadow: 0 0 4px var(--color-green-glow);
}

.bar--cyan {
  background: var(--color-cyan);
  box-shadow: 0 0 4px var(--color-cyan-glow);
}

.bar--magenta {
  background: var(--color-magenta);
  box-shadow: 0 0 4px var(--color-magenta-glow);
}

/* Warning bar colors */
.bar-fill.warning {
  background: var(--color-yellow) !important;
  box-shadow: 0 0 4px rgba(255, 255, 0, 0.4) !important;
}

.bar-fill.critical {
  background: var(--color-red) !important;
  box-shadow: 0 0 4px var(--color-red-glow) !important;
}

/* ── Section 11: Metric Details ──────────────────────────── */
.metric-detail {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.6rem;
  padding: var(--space-0_5) 0;
  border-bottom: 1px dashed var(--color-border);
}

.metric-detail:last-child {
  border-bottom: none;
}

.detail-label {
  color: var(--color-gray);
  letter-spacing: 0.1em;
}

.detail-value {
  color: var(--color-green);
  font-weight: bold;
}

/* ── Section 12: Memory Panel (RAM + Swap combined) ──────── */
.memory-section {
  margin-bottom: var(--space-2);
}

.memory-section:last-child {
  margin-bottom: 0;
}

.memory-section + .memory-section {
  border-top: 1px dashed var(--color-border);
  padding-top: var(--space-2);
}

.memory-section-header {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  margin-bottom: var(--space-1);
}

.memory-section-label {
  font-size: 0.6rem;
  font-weight: bold;
  letter-spacing: 0.15em;
  color: var(--color-cyan);
  text-shadow: 0 0 5px var(--color-cyan-glow);
}

.memory-section-label--swap {
  color: var(--color-magenta);
  text-shadow: 0 0 5px var(--color-magenta-glow);
}

/* ── Section 13: Load Average Panel ──────────────────────── */
.load-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-1);
  margin-bottom: var(--space-2);
}

.load-item {
  text-align: center;
  padding: var(--space-1);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  /* SHARP EDGES */
  border-radius: 0;
}

.load-label {
  font-size: 0.55rem;
  color: var(--color-gray);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-0_5);
}

.load-value {
  font-size: 1rem;
  font-weight: bold;
  color: var(--color-yellow);
  text-shadow: 0 0 5px rgba(255, 255, 0, 0.4);
}

/* ── Section 14: Network Panel — SPLIT LAYOUT ────────────── */
.network-split {
  display: flex;
  gap: var(--space-2);
}

.network-half {
  flex: 1;
}

.network-row {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-bottom: var(--space-1);
}

.network-dir {
  display: flex;
  align-items: center;
  gap: var(--space-0_5);
  min-width: 45px;
}

.dir-icon {
  font-size: 0.8rem;
  color: var(--color-green);
}

.network-half:last-child .dir-icon {
  color: var(--color-cyan);
}

.dir-label {
  font-size: 0.55rem;
  color: var(--color-gray);
  letter-spacing: 0.1em;
}

.network-speed {
  font-size: 1rem;
  font-weight: bold;
  color: var(--color-green);
  text-shadow: 0 0 5px var(--color-green-glow);
  flex: 1;
  text-align: right;
}

.network-unit {
  font-size: 0.55rem;
  color: var(--color-gray);
  flex-shrink: 0;
}

/* ── Section 15: Disk Panel ──────────────────────────────── */
.disk-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.disk-item {
  padding: var(--space-1) var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  /* SHARP EDGES */
  border-radius: 0;
}

.disk-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-1);
}

.disk-mount {
  font-size: 0.65rem;
  font-weight: bold;
  color: var(--color-cyan);
  letter-spacing: 0.1em;
}

.disk-value {
  font-size: 0.85rem;
  font-weight: bold;
  color: var(--color-cyan);
  text-shadow: 0 0 5px var(--color-cyan-glow);
}

.disk-detail {
  display: flex;
  justify-content: space-between;
  font-size: 0.55rem;
  color: var(--color-gray);
  margin-top: var(--space-0_5);
}

.disk-sep {
  margin: 0 var(--space-0_5);
  color: var(--color-gray-dim);
}

/* ── Section 16: Uptime Panel ────────────────────────────── */
.uptime-display {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-0_5);
  margin-bottom: var(--space-2);
  padding: var(--space-1) 0;
}

.uptime-unit {
  text-align: center;
  min-width: 36px;
}

.uptime-value {
  display: block;
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--color-green);
  text-shadow: 0 0 10px var(--color-green-glow);
  line-height: 1;
}

.uptime-label {
  display: block;
  font-size: 0.5rem;
  color: var(--color-gray);
  letter-spacing: 0.1em;
  margin-top: var(--space-0_5);
}

.uptime-sep {
  font-size: 1.2rem;
  color: var(--color-gray-dim);
  padding-bottom: var(--space-1);
}

/* ── Section 17: Process Panel ───────────────────────────── */
.process-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-1);
}

.process-item {
  text-align: center;
  padding: var(--space-1) var(--space-1);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  /* SHARP EDGES */
  border-radius: 0;
  transition: border-color var(--transition-fast);
}

.process-item:hover {
  border-color: var(--color-magenta-dim);
}

.process-value {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--color-magenta);
  text-shadow: 0 0 5px var(--color-magenta-glow);
  line-height: 1;
  margin-bottom: var(--space-0_5);
}

.process-label {
  font-size: 0.5rem;
  color: var(--color-gray);
  letter-spacing: 0.1em;
}

/* ── Section 18: Terminal Footer ─────────────────────────── */
.terminal-footer {
  border-top: 2px solid var(--color-border);
  background: var(--color-bg-panel);
  padding: var(--space-1) var(--space-2);
  margin-top: var(--space-2);
}

/* Terminal prompt in footer */
.footer-prompt {
  font-size: 0.6rem;
  color: var(--color-gray-dim);
  margin-bottom: var(--space-1);
  max-width: 1600px;
  margin-left: auto;
  margin-right: auto;
}

.footer-prompt::after {
  content: '';
  display: inline-block;
  width: 7px;
  height: 0.6em;
  background: var(--color-gray-dim);
  vertical-align: text-bottom;
  margin-left: 2px;
  animation: blink 1s step-end infinite;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  max-width: 1600px;
  margin: 0 auto;
  font-size: 0.55rem;
  color: var(--color-gray);
  letter-spacing: 0.1em;
  flex-wrap: wrap;
}

.footer-sep {
  color: var(--color-gray-dim);
}

.footer-text {
  color: var(--color-gray);
}

/* ── Section 19: Responsive Adjustments ──────────────────── */

/* Mobile: single column, compact values */
@media (max-width: 559px) {
  .metric-value {
    font-size: 1.5rem;
  }

  .metric-value--sm {
    font-size: 1.1rem;
  }

  .uptime-value {
    font-size: 1.2rem;
  }

  .uptime-unit {
    min-width: 30px;
  }

  .header-title {
    font-size: 0.75rem;
  }

  .header-meta {
    font-size: 0.6rem;
  }

  .load-value {
    font-size: 0.85rem;
  }

  .process-value {
    font-size: 1rem;
  }

  .network-speed {
    font-size: 0.85rem;
  }

  /* Wide panels span full width on mobile */
  .panel--wide {
    grid-column: span 1 !important;
  }

  /* Network split becomes stacked on mobile */
  .network-split {
    flex-direction: column;
    gap: var(--space-1);
  }
}

/* Tablet adjustments */
@media (min-width: 560px) and (max-width: 859px) {
  .metric-value {
    font-size: 1.6rem;
  }
}

/* ── Section 20: Selection & Focus ───────────────────────── */
::selection {
  background: var(--color-green);
  color: var(--color-bg);
}

:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 2px;
  /* SHARP EDGES */
  box-shadow: 0 0 0 4px var(--color-cyan-glow);
}

/* ── Section 21: Scrollbar ───────────────────────────────── */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
  border-left: 1px solid var(--color-border);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-dim);
  /* SHARP EDGES */
  border-radius: 0;
  border: 1px solid var(--color-border);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-green-dim);
}

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-gray-dim) var(--color-bg);
}

/* ── Section 22: Utility Classes ─────────────────────────── */
.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;
}

.text-green { color: var(--color-green); }
.text-cyan { color: var(--color-cyan); }
.text-magenta { color: var(--color-magenta); }
.text-yellow { color: var(--color-yellow); }
.text-red { color: var(--color-red); }
.text-gray { color: var(--color-gray); }

/* ── Section 23: Data Update Animations ──────────────────── */
@keyframes value-flash {
  0% { opacity: 1; }
  50% { opacity: 0.5; }
  100% { opacity: 1; }
}

.value-updated {
  animation: value-flash 0.3s ease;
}

/* ── Section 24: Loading State ───────────────────────────── */
@keyframes loading-pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

.loading .metric-value {
  animation: loading-pulse 1.5s ease-in-out infinite;
}

/* ── Section 25: Error State ─────────────────────────────── */
.panel.error {
  border-color: var(--color-red-dim);
  box-shadow: 0 0 8px var(--color-red-glow),
              inset 0 0 1px var(--color-red-glow);
}

.panel.error .panel-label {
  color: var(--color-red);
}

/* ── Section 26: Print Styles ────────────────────────────── */
@media print {
  .scanlines,
  .flicker,
  .crt-overlay,
  .ascii-banner {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .panel {
    break-inside: avoid;
    border: 1px solid #ccc;
  }
}

/* ── Section 27: CSS Variable Aliases (JS compat) ─────────── */
:root {
  --green: var(--color-green);
  --yellow: var(--color-yellow);
  --red: var(--color-red);
  --accent: var(--color-cyan);
}

/* ── Section 28: Sparkline Canvases ───────────────────────── */
.sparkline-canvas {
  display: block;
  width: 100%;
  height: 24px;
  margin-top: var(--space-1);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  /* SHARP EDGES */
  border-radius: 0;
  image-rendering: pixelated;
}

/* ── Section 29: Disk Empty State ─────────────────────────── */
.disk-empty {
  padding: var(--space-2) var(--space-1);
  color: var(--color-gray);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-align: center;
}

/* ── Section 30: Terminal Decorations ─────────────────────── */

/* Dashed separator lines for terminal feel */
.metric-detail,
.memory-section + .memory-section {
  border-image: repeating-linear-gradient(
    90deg,
    var(--color-border) 0px,
    var(--color-border) 2px,
    transparent 2px,
    transparent 4px
  ) 1;
}

/* Panel body top decoration — ASCII ruler */
.panel-body::before {
  content: '│ ';
  position: absolute;
  left: var(--space-1);
  top: 0;
  font-size: 0.5rem;
  color: var(--color-gray-dim);
  opacity: 0;
  pointer-events: none;
}

/* Hover decoration — ASCII arrow */
.panel:hover .panel-label::before {
  content: '> ';
  color: var(--color-green);
}

.panel-label {
  padding-left: 0;
  transition: padding-left var(--transition-fast);
}

.panel:hover .panel-label {
  padding-left: 0;
}