:root {
  --green: #00ff66;
  --green-core: #b5ffb5;
  --black: #000;
  --dark-green: #001400;
  --caliper-color: #ffdd00;
  --red: #ff3333;
  --glass-dark: rgba(0, 0, 0, 0.82);
  --glass-deep: rgba(0, 25, 0, 0.96);
  --blur: 12px;
  --radius: 14px;
  --transition: 0.3s ease;
  --glow: 0 0 18px rgba(0, 255, 136, 0.4);
  --shadow-inset: inset 0 0 8px rgba(0, 255, 136, 0.2);
  --gradient-green: linear-gradient(145deg, #00ff88 0%, #004422 100%);
  --panel-glass: linear-gradient(145deg, rgba(0,30,0,.8), rgba(0,0,0,.95));
}

@media (prefers-color-scheme: light) {
  :root {
    --black: #f0f0f0;
    --green: #00994a;
    --dark-green: #003300;
    --red: #c00;
  }
}

/* ---------- GLOBAL RESET ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  font-size: 16px;
  scroll-behavior: smooth;
}
body {
  font-family: "Share Tech Mono", monospace;
  background: radial-gradient(circle at 50% 40%, #001200 0%, #000 100%);
  background-attachment: fixed;
  color: var(--green);
  min-height: 100vh;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
  transition: background var(--transition);
}

/* ---------- CRT TEXTURE ---------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    rgba(255,255,255,0.015) 0 1px,
    transparent 1px 2px
  );
  mix-blend-mode: overlay;
  opacity: 0.25;
  pointer-events: none;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(0,255,128,0.05), transparent 70%);
  opacity: 0.6;
  pointer-events: none;
  z-index: 0;
}

/* ---------- CANVAS ---------- */
canvas {
  width: 100vw;
  height: 100vh;
  display: block;
  transform: perspective(1200px) rotateX(2deg) scale(1.015);
  filter: drop-shadow(0 0 10px var(--green));
  cursor: crosshair;
  user-select: none;
  touch-action: none;
  z-index: 1;
}

/* ---------- UI PANEL ---------- */
#ui {
  position: fixed;
  bottom:2rem;
  left: 0%;
  width: 100vw;
  max-width: 100vw;
  background: var(--panel-glass);
  border: 1px solid rgba(0,255,136,0.25);
  border-radius:0;
  backdrop-filter: blur(var(--blur)) saturate(1.3);
  box-shadow: 0 -4px 30px rgba(0,255,136,0.25), inset 0 0 10px rgba(0,255,136,0.08);
  display: flex;
  justify-content: space-around;
  align-items: center;
  gap: clamp(4px, 1vw, 10px);
  padding: clamp(8px, 2vw, 14px) clamp(12px, 4vw, 24px);
  z-index: 20;
  animation: fadeUp 1s ease-out forwards;
}

#ui button, #ui select {
  background: var(--dark-green);
  color: var(--green);
  border: 1px solid var(--green);
  border-radius: 10px;
  padding: clamp(8px, 2vw, 12px) clamp(10px, 4vw, 18px);
  font-size: clamp(0.8rem, 2vw, 1rem);
  box-shadow: var(--shadow-inset), 0 0 10px rgba(0,255,136,0.15);
  transition: all 0.25s ease;
  margin:0;
}
#ui button:hover, #ui select:hover {
  background: var(--green);
  color: var(--black);
  box-shadow: 0 0 15px var(--green);
  transform: translateY(-1px);
}
button.active {
  background: var(--green);
  color: var(--black);
  box-shadow: 0 0 18px var(--green);
}

/* ---------- INFO PANEL ---------- */
.info-display {
  position: absolute;
  top: 4rem;
  left: 0%;

  width: 100vw;
  max-width: 100vw;
  background: var(--panel-glass);
  border-bottom: 1px solid rgba(0,255,136,0.25);
  
  border-radius:0;
  padding: 1rem 1.5rem;
  text-align: center;
  box-shadow: 0 0 25px rgba(0,255,136,0.25), inset 0 0 10px rgba(0,255,136,0.1);
  color: var(--green);
  backdrop-filter: blur(var(--blur));
  animation: fadeUp 0.8s ease-out forwards;
  z-index: 10;
  margin:0;
}

/* ---------- LOGO & HR INDICATOR ---------- */
.logo-display {
  position: absolute;
  top: 1.2rem;
  left: 1.2rem;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--green);
  text-shadow: 0 0 10px var(--green);
  z-index: 15;
}

#hrIndicator {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 15px var(--red);
  opacity: 0;
  transition: opacity 0.1s;
  z-index: 16;
}
#hrIndicator.beat { opacity: 1; }

/* ---------- DERIVAÇÃO ---------- */
#derivacao {
  position: absolute;
  bottom: 30%;
  right: 1rem;
  background: rgba(0,15,0,0.9);
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--green);
  font-size: clamp(0.7rem, 2vw, 0.9rem);
  box-shadow: inset 0 0 8px rgba(0,255,136,0.1);
  text-shadow: 0 0 4px var(--green);
  backdrop-filter: blur(8px);
}

/* ---------- SELECT ---------- */
.select-wrapper {
  position: relative;
  display: inline-block;
  width: 100%;
}
.select-wrapper select {
  appearance: none;
  width: 100%;
  padding: 10px 42px 10px 14px;
  font-family: inherit;
  font-size: clamp(0.8rem, 1.8vw, 1rem);
  color: var(--green);
  background: rgba(0, 20, 0, 0.65);
  border: 1px solid rgba(0, 255, 136, 0.3);
  border-radius: var(--radius);
  cursor: pointer;
  box-shadow: inset 0 0 10px rgba(0, 255, 136, 0.15);
  text-shadow: 0 0 3px rgba(0,255,0,0.5);
  transition: all var(--transition);
}
.select-wrapper i {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--green);
  pointer-events: none;
  text-shadow: 0 0 8px var(--green);
  transition: transform 0.3s ease, filter 0.3s ease;
}
.select-wrapper:focus-within i {
  transform: translateY(-50%) rotate(180deg);
  filter: drop-shadow(0 0 6px var(--green));
}

/* ---------- TEXT NEON ---------- */
h1, h2, h3, .info-display strong {
  background: linear-gradient(to top, var(--green) 0%, var(--green-core) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 12px var(--green-core);
}

/* ---------- ANIMAÇÕES ---------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes ambientGlow {
  0%,100% { text-shadow: 0 0 10px var(--green), 0 0 18px var(--green-core); }
  50% { text-shadow: 0 0 5px var(--green), 0 0 10px var(--green-core); }
}
body, .info-display, .logo-display { animation: ambientGlow 6s ease-in-out infinite alternate; }

/* ---------- RESPONSIVIDADE ---------- */
@media (max-width: 768px) {
  .info-display {

    width: 100vw;
    padding: 0.8rem 1rem;
    font-size: 0.95rem;
  }
  #ui {
    flex-direction: row;
    flex-wrap: wrap;
    width: 100vw;
    bottom: 0px;
    font-size: 0.9rem;
  }
  #ui button, #ui select {
    flex: 1 1 45%;
    padding: 0.6rem 0.8rem;
  }
}
@media (min-width: 1024px) {
  .info-display {
    width: 100vw;
    font-size: 1.2rem;
    padding: 1.5rem 2rem;
  }
  #ui { width: 100vw; bottom: 2rem; }
  #ui button, #ui select { font-size: 1rem; }
}