/* ==========================================================================
   RETRO 3-DIGIT RANDOM GENERATOR - STYLES (Random.ooo)
   ========================================================================== */

:root {
  --bg-color: #050608;
  --digit-color: #ffffff;
  --glow-color: rgba(255, 255, 255, 0.85);
  --glow-ambient: rgba(255, 255, 255, 0.3);
  --border-color: rgba(255, 255, 255, 0.08);
  --box-bg: rgba(255, 255, 255, 0.015);
  --font-retro: 'Share Tech Mono', 'Space Mono', 'Chakra Petch', 'VT323', monospace;
}

/* Phosphor CRT Color Themes */
body.theme-white {
  --digit-color: #ffffff;
  --glow-color: rgba(255, 255, 255, 0.9);
  --glow-ambient: rgba(255, 255, 255, 0.35);
  --theme-dot: #ffffff;
}

body.theme-amber {
  --digit-color: #ffb400;
  --glow-color: rgba(255, 180, 0, 0.95);
  --glow-ambient: rgba(255, 140, 0, 0.45);
  --border-color: rgba(255, 180, 0, 0.15);
  --box-bg: rgba(255, 180, 0, 0.02);
  --theme-dot: #ffb400;
}

body.theme-green {
  --digit-color: #39ff14;
  --glow-color: rgba(57, 255, 20, 0.95);
  --glow-ambient: rgba(20, 200, 40, 0.45);
  --border-color: rgba(57, 255, 20, 0.15);
  --box-bg: rgba(57, 255, 20, 0.02);
  --theme-dot: #39ff14;
}

body.theme-cyan {
  --digit-color: #00f0ff;
  --glow-color: rgba(0, 240, 255, 0.95);
  --glow-ambient: rgba(0, 180, 255, 0.45);
  --border-color: rgba(0, 240, 255, 0.15);
  --box-bg: rgba(0, 240, 255, 0.02);
  --theme-dot: #00f0ff;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

html, body {
  width: 100vw;
  height: 100dvh;
  min-height: 100dvh;
  overflow: hidden;
  background-color: var(--bg-color);
  background-image: 
    radial-gradient(ellipse at center, #0e1118 0%, #050608 70%, #000000 100%);
  color: var(--digit-color);
  font-family: var(--font-retro);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   AUTHENTIC 80s CRT POWER-ON BEAM ANIMATION
   ========================================================================== */

.crt-power-beam {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100dvh;
  background: #000000;
  z-index: 100;
  pointer-events: none;
  animation: crt-turn-on 0.65s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

@keyframes crt-turn-on {
  0% {
    transform: scale(1, 0.003);
    opacity: 1;
    filter: brightness(20);
    background: var(--digit-color);
  }
  35% {
    transform: scale(1, 0.003);
    opacity: 1;
    filter: brightness(10);
    background: var(--digit-color);
  }
  70% {
    transform: scale(1, 1);
    opacity: 0.9;
    filter: brightness(1.5);
    background: transparent;
  }
  100% {
    transform: scale(1, 1);
    opacity: 0;
    filter: brightness(1);
    visibility: hidden;
    background: transparent;
  }
}

/* ==========================================================================
   CRT SCANLINES & VIGNETTE OVERLAY
   ========================================================================== */

.crt-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100dvh;
  pointer-events: none;
  z-index: 20;
  background: radial-gradient(circle at center, transparent 55%, rgba(0, 0, 0, 0.8) 100%);
  box-shadow: inset 0 0 100px rgba(0, 0, 0, 0.9);
}

.scanlines {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100dvh;
  pointer-events: none;
  z-index: 21;
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0),
    rgba(255, 255, 255, 0) 50%,
    rgba(0, 0, 0, 0.32) 50%,
    rgba(0, 0, 0, 0.32)
  );
  background-size: 100% 4px;
  opacity: 0.7;
}

/* Subtle CRT phosphor flicker */
@keyframes screen-flicker {
  0% { opacity: 0.985; }
  50% { opacity: 1; }
  52% { opacity: 0.97; }
  54% { opacity: 1; }
  85% { opacity: 0.985; }
  100% { opacity: 1; }
}

body {
  animation: screen-flicker 0.18s infinite;
}

/* ==========================================================================
   TOP TITLE HEADER
   ========================================================================== */

.site-header {
  position: fixed;
  top: clamp(16px, 3vh, 32px);
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 25;
  pointer-events: none;
}

.site-title {
  font-family: var(--font-retro);
  font-size: clamp(13px, 2vw, 20px);
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--digit-color);
  text-shadow: 
    0 0 10px var(--glow-color),
    0 0 25px var(--glow-ambient);
  margin: 0;
  padding: 0;
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

/* ==========================================================================
   MAIN 3-DIGIT DISPLAY
   ========================================================================== */

.display-container {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  gap: clamp(8px, 2.5vw, 40px);
  z-index: 10;
  padding: 2vw;
  font-size: min(29vw, 68vh);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

.digit-box {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 0.68em;
  height: 1.1em;
  position: relative;
  overflow: hidden;
  text-align: center;
  background: var(--box-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 
    inset 0 0 20px rgba(0, 0, 0, 0.8),
    0 0 15px var(--glow-ambient);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
}

.digit {
  display: inline-block;
  font-weight: 700;
  color: var(--digit-color);
  text-shadow: 
    0 0 12px var(--glow-color),
    0 0 35px var(--glow-ambient),
    0 0 75px var(--glow-ambient);
  will-change: transform, filter, opacity;
  transform: translateZ(0);
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

/* Rolling Animation State */
.digit-box.rolling {
  border-color: var(--glow-color);
  box-shadow: 
    inset 0 0 25px var(--glow-ambient),
    0 0 30px var(--glow-ambient);
}

.digit-box.rolling .digit {
  filter: blur(2px);
  opacity: 0.85;
  animation: retro-scramble-jitter 0.06s infinite alternate;
}

@keyframes retro-scramble-jitter {
  0% { transform: translateY(-3%) scaleY(1.04); }
  100% { transform: translateY(3%) scaleY(0.96); }
}

/* Lock-in Pop Animation */
.digit-box.locked .digit {
  animation: digit-snap 0.32s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes digit-snap {
  0% {
    transform: scale(1.16) translateY(-2%);
    filter: blur(0) brightness(2.2);
    text-shadow: 
      0 0 25px var(--digit-color),
      0 0 60px var(--glow-color),
      0 0 100px var(--glow-ambient);
  }
  100% {
    transform: scale(1) translateY(0);
    filter: blur(0) brightness(1);
    text-shadow: 
      0 0 12px var(--glow-color),
      0 0 35px var(--glow-ambient),
      0 0 75px var(--glow-ambient);
  }
}

/* ==========================================================================
   RETRO TOAST HUD NOTIFICATION
   ========================================================================== */

.toast-hud {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  background: rgba(5, 6, 8, 0.94);
  border: 1px solid var(--glow-color);
  box-shadow: 0 0 30px var(--glow-ambient);
  color: var(--digit-color);
  font-family: var(--font-retro);
  font-size: clamp(12px, 1.8vw, 18px);
  letter-spacing: 0.2em;
  padding: 12px 24px;
  border-radius: 6px;
  z-index: 50;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast-hud.show {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

/* ==========================================================================
   FOOTER & TOOLBAR CONTROLS
   ========================================================================== */

.hint-bar {
  position: fixed;
  bottom: clamp(16px, 3vh, 32px);
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 clamp(16px, 4vw, 40px);
  z-index: 25;
  opacity: 0.4;
  transition: opacity 0.3s ease;
  pointer-events: auto;
}

body:hover .hint-bar {
  opacity: 0.85;
}

.hint-text {
  font-size: clamp(10px, 1.2vw, 13px);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--digit-color);
  text-shadow: 0 0 8px var(--glow-ambient);
}

.action-buttons {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tool-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 4px;
  color: var(--digit-color);
  padding: 5px 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: all 0.2s ease;
}

.tool-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--glow-color);
  box-shadow: 0 0 10px var(--glow-ambient);
  transform: translateY(-1px);
}

.tool-btn:active {
  transform: translateY(1px);
}

/* Color dot indicator in theme switcher */
.color-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--theme-dot, #ffffff);
  box-shadow: 0 0 6px var(--glow-color);
}

.sound-toggle.muted svg {
  opacity: 0.4;
}

.sound-toggle.muted::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 2px;
  background-color: #ff5555;
  transform: rotate(45deg);
}

/* ==========================================================================
   MOBILE & PORTRAIT ADAPTATION
   ========================================================================== */

@media (max-aspect-ratio: 1/1) {
  .display-container {
    font-size: min(30vw, 40vh);
    gap: clamp(6px, 2vw, 20px);
  }
}