:root,
[data-theme="dark"] {
  --font-pixel: 'Press Start 2P', monospace;
  --font-ui: 'Silkscreen', 'Press Start 2P', monospace;
  --font-mono: 'Space Mono', monospace;
  --font-digital: 'VT323', monospace;

  /* 16-Bit Dark Palette (SNES / Mad TV Night Studio) */
  --retro-bg: #0c101a;
  --retro-bg-pattern: #131926;
  --retro-window-bg: #1a2236;
  --retro-window-inner: #101624;
  --retro-card-bg: #182033;
  --retro-card-hover: #222c44;
  
  --retro-bevel-light: #44567e;
  --retro-bevel-dark: #07090f;
  --retro-border: #28354f;

  --retro-titlebar-bg: linear-gradient(90deg, #1c396c 0%, #2f599e 50%, #172d54 100%);
  --retro-titlebar-text: #f8fafc;
  --retro-titlebar-stripes: repeating-linear-gradient(90deg, #244882, #244882 4px, #162f59 4px, #162f59 8px);

  --retro-text-main: #f1f5f9;
  --retro-text-dim: #94a3b8;
  --retro-text-muted: #64748b;

  --retro-accent-amber: #fbbf24;
  --retro-accent-cyan: #00f0ff;
  --retro-accent-green: #10b981;
  --retro-accent-red: #f43f5e;
  --retro-accent-purple: #c084fc;

  --retro-shadow: 3px 3px 0px #05070c;
  --retro-shadow-lg: 6px 6px 0px #04060a;
  --retro-grid-line: rgba(255, 255, 255, 0.08);

  --chart-grid-color: rgba(255, 255, 255, 0.08);
  --chart-text-color: #94a3b8;
}

[data-theme="light"] {
  --font-pixel: 'Press Start 2P', monospace;
  --font-ui: 'Silkscreen', 'Press Start 2P', monospace;
  --font-mono: 'Space Mono', monospace;
  --font-digital: 'VT323', monospace;

  /* 16-Bit Bright Palette (Amiga Workbench / Windows 95 / SNES Day Mode) */
  --retro-bg: #b8bec9;
  --retro-bg-pattern: #c8ceda;
  --retro-window-bg: #d4d8e2;
  --retro-window-inner: #f1f4f9;
  --retro-card-bg: #dde2ed;
  --retro-card-hover: #eaf0fa;

  --retro-bevel-light: #ffffff;
  --retro-bevel-dark: #586173;
  --retro-border: #4d576a;

  --retro-titlebar-bg: linear-gradient(90deg, #0a246a 0%, #1d50b5 60%, #081e54 100%);
  --retro-titlebar-text: #ffffff;
  --retro-titlebar-stripes: repeating-linear-gradient(90deg, #103387, #103387 4px, #071c4f 4px, #071c4f 8px);

  --retro-text-main: #0f172a;
  --retro-text-dim: #334155;
  --retro-text-muted: #64748b;

  --retro-accent-amber: #b45309;
  --retro-accent-cyan: #0284c7;
  --retro-accent-green: #047857;
  --retro-accent-red: #be123c;
  --retro-accent-purple: #7e22ce;

  --retro-shadow: 3px 3px 0px #50596b;
  --retro-shadow-lg: 6px 6px 0px #404857;
  --retro-grid-line: rgba(0, 0, 0, 0.1);

  --chart-grid-color: rgba(0, 0, 0, 0.1);
  --chart-text-color: #334155;
}

html, body {
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
  box-sizing: border-box;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-mono);
  background-color: var(--retro-bg);
  color: var(--retro-text-main);
  min-height: 100vh;
  min-height: -webkit-fill-available;
  position: relative;
  background-image: 
    radial-gradient(var(--retro-bg-pattern) 15%, transparent 16%),
    radial-gradient(var(--retro-bg-pattern) 15%, transparent 16%);
  background-size: 16px 16px;
  background-position: 0 0, 8px 8px;
  transition: background-color 0.2s ease, color 0.2s ease;
  -webkit-font-smoothing: antialiased;
}

/* Optional CRT Scanlines Layer */
.crt-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  background: linear-gradient(
    rgba(18, 16, 16, 0) 50%, 
    rgba(0, 0, 0, 0.18) 50%
  ), linear-gradient(
    90deg,
    rgba(255, 0, 0, 0.015),
    rgba(0, 255, 0, 0.01),
    rgba(0, 0, 255, 0.015)
  );
  background-size: 100% 3px, 6px 100%;
  opacity: 0.6;
}

/* Base Container with Safe Area Support */
.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0.6rem 0.6rem 3rem 0.6rem;
  padding-left: max(0.6rem, env(safe-area-inset-left));
  padding-right: max(0.6rem, env(safe-area-inset-right));
  padding-bottom: max(3rem, env(safe-area-inset-bottom));
  box-sizing: border-box;
}

/* 16-Bit Retro Window Component */
.retro-window {
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  background-color: var(--retro-window-bg);
  border-top: 3px solid var(--retro-bevel-light);
  border-left: 3px solid var(--retro-bevel-light);
  border-right: 3px solid var(--retro-bevel-dark);
  border-bottom: 3px solid var(--retro-bevel-dark);
  box-shadow: var(--retro-shadow);
  margin-bottom: 1.15rem;
}

.retro-window-header {
  background: var(--retro-titlebar-bg);
  color: var(--retro-titlebar-text);
  padding: 0.35rem 0.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 2px solid var(--retro-bevel-dark);
  font-family: var(--font-pixel);
  font-size: clamp(0.58rem, 2.2vw, 0.7rem);
  letter-spacing: 0.04em;
  user-select: none;
  gap: 0.4rem;
  box-sizing: border-box;
}

.retro-window-title {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 700;
  text-transform: uppercase;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.retro-window-controls {
  display: flex;
  gap: 0.25rem;
  flex-shrink: 0;
}

.retro-btn-box {
  width: 22px;
  height: 22px;
  min-width: 22px;
  background: var(--retro-window-bg);
  border-top: 2px solid var(--retro-bevel-light);
  border-left: 2px solid var(--retro-bevel-light);
  border-right: 2px solid var(--retro-bevel-dark);
  border-bottom: 2px solid var(--retro-bevel-dark);
  color: var(--retro-text-main);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-family: var(--font-pixel);
  cursor: pointer;
  line-height: 1;
  user-select: none;
  touch-action: manipulation;
}

.retro-btn-box:active {
  border-top: 2px solid var(--retro-bevel-dark);
  border-left: 2px solid var(--retro-bevel-dark);
  border-right: 2px solid var(--retro-bevel-light);
  border-bottom: 2px solid var(--retro-bevel-light);
  transform: translate(1px, 1px);
}

.retro-window-content {
  padding: 0.75rem;
  box-sizing: border-box;
}

/* Inset Retro Wells */
.retro-well {
  background: var(--retro-window-inner);
  border-top: 2px solid var(--retro-bevel-dark);
  border-left: 2px solid var(--retro-bevel-dark);
  border-right: 2px solid var(--retro-bevel-light);
  border-bottom: 2px solid var(--retro-bevel-light);
  padding: 0.45rem;
  box-sizing: border-box;
}

/* 16-Bit Interactive Buttons */
.retro-btn {
  font-family: var(--font-ui);
  font-size: clamp(0.62rem, 2.2vw, 0.72rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.4rem 0.65rem;
  background-color: var(--retro-window-bg);
  color: var(--retro-text-main);
  border-top: 2px solid var(--retro-bevel-light);
  border-left: 2px solid var(--retro-bevel-light);
  border-right: 2px solid var(--retro-bevel-dark);
  border-bottom: 2px solid var(--retro-bevel-dark);
  box-shadow: 2px 2px 0px rgba(0,0,0,0.3);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  transition: background-color 0.1s ease;
  user-select: none;
  touch-action: manipulation;
  white-space: nowrap;
}

.retro-btn:hover {
  background-color: var(--retro-card-hover);
}

.retro-btn:active,
.retro-btn.active {
  border-top: 2px solid var(--retro-bevel-dark);
  border-left: 2px solid var(--retro-bevel-dark);
  border-right: 2px solid var(--retro-bevel-light);
  border-bottom: 2px solid var(--retro-bevel-light);
  box-shadow: inset 1px 1px 0px rgba(0,0,0,0.5);
  transform: translate(1px, 1px);
}

.retro-btn.btn-accent {
  background-color: var(--retro-accent-amber);
  color: #000000;
  border-color: #fde68a #92400e #92400e #fde68a;
}

/* Group Headers */
.group-section {
  margin-bottom: 1.15rem;
  width: 100%;
  box-sizing: border-box;
}

.group-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem;
  margin-bottom: 0.45rem;
  padding: 0.35rem 0.55rem;
  background: var(--retro-window-bg);
  border-top: 2px solid var(--retro-bevel-light);
  border-left: 2px solid var(--retro-bevel-light);
  border-right: 2px solid var(--retro-bevel-dark);
  border-bottom: 2px solid var(--retro-bevel-dark);
  box-sizing: border-box;
  flex-wrap: wrap;
}

.group-title {
  font-family: var(--font-pixel);
  font-size: clamp(0.58rem, 2.2vw, 0.72rem);
  font-weight: 700;
  color: var(--retro-text-main);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.group-hint {
  font-family: var(--font-ui);
  font-size: 0.58rem;
  color: var(--retro-text-dim);
}

/* Top-Down Metric List Stack */
.metrics-list-stack {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

/* Status Badges */
.retro-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.15rem 0.4rem;
  font-family: var(--font-ui);
  font-size: clamp(0.52rem, 1.8vw, 0.62rem);
  font-weight: 700;
  border-top: 2px solid var(--retro-bevel-dark);
  border-left: 2px solid var(--retro-bevel-dark);
  border-right: 2px solid var(--retro-bevel-light);
  border-bottom: 2px solid var(--retro-bevel-light);
  background: var(--retro-window-inner);
  color: var(--retro-text-main);
  text-transform: uppercase;
  white-space: nowrap;
}

.retro-badge.badge-green {
  color: var(--retro-accent-green);
  border-color: #064e3b #34d399 #34d399 #064e3b;
}

.retro-badge.badge-amber {
  color: var(--retro-accent-amber);
  border-color: #78350f #fbbf24 #fbbf24 #78350f;
}

.retro-badge.badge-cyan {
  color: var(--retro-accent-cyan);
  border-color: #0c4a6e #38bdf8 #38bdf8 #0c4a6e;
}

.retro-badge.badge-red {
  color: var(--retro-accent-red);
  border-color: #881337 #fb7185 #fb7185 #881337;
}

/* Flashing Blinker for Live Status */
.retro-blinker {
  display: inline-block;
  width: 7px;
  height: 7px;
  min-width: 7px;
  background-color: var(--retro-accent-green);
  animation: retroBlink 1s steps(2, start) infinite;
}

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

/* App Footer */
.app-footer {
  margin-top: 1.25rem;
  padding-top: 0.75rem;
  border-top: 2px solid var(--retro-bevel-dark);
  font-family: var(--font-ui);
  font-size: clamp(0.52rem, 1.8vw, 0.65rem);
  color: var(--retro-text-dim);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

@media (max-width: 640px) {
  .container {
    padding: 0.4rem 0.4rem 2rem 0.4rem;
  }
  .group-hint {
    display: none;
  }
}