/* ==========================================================
   WOPR TERMINAL — burtlao.com
   WarGames (1983) inspired CRT terminal design system
   ========================================================== */

/* ── CSS Variables ── */
:root {
  /* Phosphor Green (default) */
  --phosphor: #33ff33;
  --phosphor-dim: #1a9e1a;
  --phosphor-dark: #0a3d0a;
  --phosphor-glow: rgba(51, 255, 51, 0.35);
  --phosphor-glow-strong: rgba(51, 255, 51, 0.6);

  /* Amber (alternate) */
  --amber: #ffb000;
  --amber-dim: #9e6d00;
  --amber-dark: #3d2a00;
  --amber-glow: rgba(255, 176, 0, 0.35);
  --amber-glow-strong: rgba(255, 176, 0, 0.6);

  /* DEFCON Red (easter egg) */
  --defcon-red: #ff1a1a;
  --defcon-glow: rgba(255, 26, 26, 0.4);

  /* Active theme colors (overridden by .amber class) */
  --text: var(--phosphor);
  --text-dim: var(--phosphor-dim);
  --text-dark: var(--phosphor-dark);
  --glow: var(--phosphor-glow);
  --glow-strong: var(--phosphor-glow-strong);

  /* Backgrounds */
  --bg-page: #000000;
  --bg-screen: #020a02;
  --bg-bezel: #1a1a1a;
  --bg-bezel-edge: #111111;

  /* Typography */
  --font: 'VT323', 'Courier New', monospace;
  --font-size: 19px;
  --font-size-mobile: 15px;
  --line-height: 1.45;

  /* Timing */
  --flicker-speed: 0.08s;
  --scanline-opacity: 0.12;
}

/* ── Amber Theme ── */
body.amber {
  --text: var(--amber);
  --text-dim: var(--amber-dim);
  --text-dark: var(--amber-dark);
  --glow: var(--amber-glow);
  --glow-strong: var(--amber-glow-strong);
  --bg-screen: #0a0802;
}

/* ── DEFCON Mode (Konami Code) ── */
body.defcon {
  --text: var(--defcon-red);
  --text-dim: #991010;
  --text-dark: #3d0a0a;
  --glow: var(--defcon-glow);
  --glow-strong: rgba(255, 26, 26, 0.6);
  --bg-screen: #0a0202;
}

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

/* ── Base ── */
html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-page);
  font-family: var(--font);
  font-size: var(--font-size);
  line-height: var(--line-height);
  color: var(--text);
  -webkit-font-smoothing: none;
  -moz-osx-font-smoothing: unset;
}

/* ── CRT Monitor Frame ── */
#crt-frame {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

/* ── CRT Screen Container ── */
#crt-screen {
  position: relative;
  width: 100%;
  max-width: 960px;
  height: calc(100vh - 100px);
  background: var(--bg-screen);
  border: 3px solid #222;
  border-radius: 18px;
  overflow: hidden;
  display: flex;
  flex-direction: column;

  /* CRT glow */
  box-shadow:
    inset 0 0 80px rgba(0, 0, 0, 0.6),
    0 0 20px var(--glow),
    0 0 60px var(--glow),
    0 0 120px rgba(51, 255, 51, 0.08);

  animation: flicker 8s infinite;
}

body.amber #crt-screen {
  box-shadow:
    inset 0 0 80px rgba(0, 0, 0, 0.6),
    0 0 20px var(--glow),
    0 0 60px var(--glow),
    0 0 120px rgba(255, 176, 0, 0.08);
}

body.defcon #crt-screen {
  box-shadow:
    inset 0 0 80px rgba(0, 0, 0, 0.6),
    0 0 20px var(--defcon-glow),
    0 0 60px var(--defcon-glow),
    0 0 120px rgba(255, 26, 26, 0.15);
  animation: flicker 8s infinite, defcon-pulse 1.5s ease-in-out infinite;
}

/* ── Scanlines Overlay ── */
#crt-screen::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 1px,
    rgba(0, 0, 0, var(--scanline-opacity)) 1px,
    rgba(0, 0, 0, var(--scanline-opacity)) 2px
  );
  pointer-events: none;
  z-index: 10;
}

/* ── Vignette Overlay ── */
#crt-screen::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at center,
    transparent 50%,
    rgba(0, 0, 0, 0.45) 85%,
    rgba(0, 0, 0, 0.8) 100%
  );
  pointer-events: none;
  z-index: 11;
}

/* ── Terminal Output Area ── */
#terminal-output {
  flex: 1;
  overflow-y: auto;
  padding: 28px 32px 8px;
  white-space: pre-wrap;
  word-wrap: break-word;
  font-size: var(--font-size);
  line-height: var(--line-height);
  color: var(--text);
  text-shadow:
    0 0 5px var(--glow),
    0 0 15px var(--glow);
  z-index: 5;
  scrollbar-width: thin;
  scrollbar-color: var(--text-dark) transparent;
}

#terminal-output::-webkit-scrollbar {
  width: 6px;
}

#terminal-output::-webkit-scrollbar-track {
  background: transparent;
}

#terminal-output::-webkit-scrollbar-thumb {
  background: var(--text-dark);
  border-radius: 3px;
}

/* ── Terminal Links ── */
#terminal-output a,
.terminal-link {
  color: var(--text);
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 3px;
  cursor: pointer;
  transition: text-shadow 0.2s;
}

#terminal-output a:hover,
.terminal-link:hover {
  text-shadow:
    0 0 8px var(--glow-strong),
    0 0 20px var(--glow-strong);
}

/* ── Input Line ── */
#input-line {
  display: flex;
  align-items: center;
  padding: 8px 32px 20px;
  z-index: 5;
  flex-shrink: 0;
}

#prompt {
  color: var(--text);
  text-shadow: 0 0 5px var(--glow);
  margin-right: 4px;
  user-select: none;
}

#terminal-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--font);
  font-size: var(--font-size);
  line-height: var(--line-height);
  caret-color: transparent;
  text-shadow: 0 0 5px var(--glow);
  -webkit-font-smoothing: none;
}

#terminal-input::selection {
  background: var(--text-dark);
  color: var(--text);
}

/* ── Blinking Block Cursor ── */
#cursor {
  color: var(--text);
  text-shadow: 0 0 5px var(--glow);
  animation: blink-cursor 1s step-end infinite;
  user-select: none;
}

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

/* ── CRT Monitor Base ── */
#crt-base {
  width: 100%;
  max-width: 960px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 24px;
  background: linear-gradient(180deg, #222 0%, #1a1a1a 50%, #111 100%);
  border-radius: 0 0 12px 12px;
  border: 2px solid #222;
  border-top: none;
}

.power-led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text);
  box-shadow: 0 0 6px var(--glow-strong), 0 0 12px var(--glow);
  animation: led-pulse 3s ease-in-out infinite;
}

@keyframes led-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.crt-label {
  font-family: var(--font);
  font-size: 12px;
  color: #555;
  letter-spacing: 3px;
  text-transform: uppercase;
  user-select: none;
}

/* ── Screen Flicker Animation ── */
@keyframes flicker {
  0% { opacity: 1; }
  3% { opacity: 0.97; }
  6% { opacity: 1; }
  7% { opacity: 0.95; }
  8% { opacity: 1; }
  48% { opacity: 1; }
  50% { opacity: 0.98; }
  52% { opacity: 1; }
  97% { opacity: 1; }
  98% { opacity: 0.96; }
  100% { opacity: 1; }
}

/* ── DEFCON Pulse Animation ── */
@keyframes defcon-pulse {
  0%, 100% {
    box-shadow:
      inset 0 0 80px rgba(0, 0, 0, 0.6),
      0 0 20px var(--defcon-glow),
      0 0 60px var(--defcon-glow);
  }
  50% {
    box-shadow:
      inset 0 0 80px rgba(0, 0, 0, 0.6),
      0 0 30px var(--defcon-glow),
      0 0 90px var(--defcon-glow),
      0 0 140px rgba(255, 26, 26, 0.2);
  }
}

/* ── CRT Warm-Up Animation ── */
@keyframes warmup {
  0% {
    filter: brightness(0);
    transform: scaleY(0.005);
  }
  20% {
    filter: brightness(0.3);
    transform: scaleY(0.005);
  }
  40% {
    filter: brightness(0.5);
    transform: scaleY(1);
  }
  60% {
    filter: brightness(0.7);
  }
  100% {
    filter: brightness(1);
    transform: scaleY(1);
  }
}

#crt-screen.warming-up {
  animation: warmup 2s ease-out forwards;
}

/* ── Glitch Effect (for Konami code) ── */
@keyframes glitch {
  0% { transform: translate(0); }
  10% { transform: translate(-3px, 2px); }
  20% { transform: translate(3px, -1px); }
  30% { transform: translate(-1px, 3px); }
  40% { transform: translate(2px, -2px); }
  50% { transform: translate(-2px, 1px); }
  60% { transform: translate(3px, 3px); }
  70% { transform: translate(-3px, -2px); }
  80% { transform: translate(1px, 2px); }
  90% { transform: translate(-1px, -1px); }
  100% { transform: translate(0); }
}

#crt-screen.glitch {
  animation: glitch 0.3s linear infinite;
}

/* ── Screen Flash ── */
@keyframes screen-flash {
  0% { background: var(--bg-screen); }
  50% { background: rgba(255, 255, 255, 0.15); }
  100% { background: var(--bg-screen); }
}

#crt-screen.flash {
  animation: screen-flash 0.15s ease-out;
}

/* ── Skip Boot Button ── */
#skip-boot {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: transparent;
  border: 1px solid var(--text-dim);
  color: var(--text-dim);
  font-family: var(--font);
  font-size: 14px;
  padding: 6px 16px;
  cursor: pointer;
  z-index: 100;
  letter-spacing: 2px;
  transition: all 0.3s;
  opacity: 0.5;
}

#skip-boot:hover {
  opacity: 1;
  border-color: var(--text);
  color: var(--text);
  text-shadow: 0 0 8px var(--glow);
  box-shadow: 0 0 10px var(--glow);
}

#skip-boot.hidden {
  display: none;
}

/* ── Voice Button ── */
#voice-btn {
  position: fixed;
  top: 20px;
  right: 20px;
  background: transparent;
  border: 1px solid var(--text-dark);
  color: var(--text-dim);
  font-family: var(--font);
  font-size: 20px;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 100;
  border-radius: 4px;
  transition: all 0.3s;
  opacity: 0.4;
}

#voice-btn:hover {
  opacity: 1;
  border-color: var(--text);
  text-shadow: 0 0 8px var(--glow);
  box-shadow: 0 0 10px var(--glow);
}

#voice-btn.active {
  opacity: 1;
  color: var(--text);
  border-color: var(--text);
  box-shadow: 0 0 10px var(--glow);
}

/* ── Mobile Command Bar ── */
#mobile-commands {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(10, 10, 10, 0.95);
  border-top: 1px solid var(--text-dark);
  padding: 8px;
  z-index: 50;
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  backdrop-filter: blur(8px);
}

#mobile-commands button {
  display: inline-block;
  background: transparent;
  border: 1px solid var(--text-dark);
  color: var(--text-dim);
  font-family: var(--font);
  font-size: 13px;
  padding: 6px 12px;
  margin: 2px 4px;
  cursor: pointer;
  border-radius: 3px;
  transition: all 0.2s;
  letter-spacing: 1px;
}

#mobile-commands button:hover,
#mobile-commands button:active {
  border-color: var(--text);
  color: var(--text);
  text-shadow: 0 0 5px var(--glow);
}

/* ── Highlighted / Emphasized Text ── */
.text-bright {
  color: var(--text);
  text-shadow:
    0 0 8px var(--glow-strong),
    0 0 20px var(--glow);
}

.text-dim {
  color: var(--text-dim);
  text-shadow: none;
}

.text-header {
  color: var(--text);
  text-shadow:
    0 0 10px var(--glow-strong),
    0 0 25px var(--glow),
    0 0 50px var(--glow);
}

/* ── Typing cursor for boot sequence ── */
.typing-cursor::after {
  content: '█';
  animation: blink-cursor 1s step-end infinite;
}

/* ── Screen Reader Only ── */
.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;
}

/* ── Noise texture (subtle) ── */
#crt-screen {
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  background-color: var(--bg-screen);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  :root {
    --font-size: var(--font-size-mobile);
  }

  #crt-frame {
    padding: 8px;
  }

  #crt-screen {
    border-radius: 10px;
    height: calc(100vh - 130px);
  }

  #terminal-output {
    padding: 16px 16px 6px;
  }

  #input-line {
    padding: 6px 16px 12px;
  }

  #crt-base {
    border-radius: 0 0 8px 8px;
    padding: 8px 16px;
  }

  #mobile-commands {
    display: block;
  }

  #skip-boot {
    bottom: 70px;
    right: 16px;
  }
}

@media (max-width: 480px) {
  #crt-screen {
    border-radius: 6px;
    border-width: 2px;
    height: calc(100vh - 120px);
  }

  #terminal-output {
    padding: 12px 12px 4px;
  }

  #input-line {
    padding: 4px 12px 10px;
  }
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  #crt-screen {
    animation: none !important;
  }

  #crt-screen.warming-up {
    animation: none !important;
    filter: brightness(1);
    transform: scaleY(1);
  }

  #crt-screen.glitch {
    animation: none !important;
  }

  #cursor {
    animation: none !important;
    opacity: 1;
  }

  .power-led {
    animation: none !important;
  }

  #crt-screen::before {
    opacity: 0.5;
  }
}

/* ── Print Styles ── */
@media print {
  #crt-screen::before,
  #crt-screen::after {
    display: none;
  }

  #crt-screen {
    box-shadow: none;
    border: 1px solid #333;
    animation: none;
  }

  #terminal-output {
    color: #000;
    text-shadow: none;
  }
}