/* matrixrain — Pure Minimalist Stylesheet */
:root {
  --matrix-green: #00ff66;
  --matrix-dim: #003b15;
  --bg-black: #000000;
  --text-main: #e8faed;
  --text-muted: #5b7e68;
  --font-mono: "SF Mono", "Fira Code", "Cascadia Code", "Roboto Mono", "Courier New", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
  -webkit-user-select: none;
}

html, body {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background-color: var(--bg-black);
  color: var(--text-main);
  font-family: var(--font-mono);
  position: relative;
}

/* Fullscreen Canvas */
#matrix-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  z-index: 1;
  background: var(--bg-black);
}

/* HUD Top Header */
.hud-top {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  transition: opacity 0.4s ease, transform 0.4s ease;
  pointer-events: auto;
}

.hud-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: default;
}

.prompt {
  color: var(--matrix-green);
  font-size: 1.15rem;
  font-weight: 700;
  text-shadow: 0 0 10px rgba(0, 255, 102, 0.7);
}

.brand-title {
  color: #ffffff;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.3px;
  opacity: 0.95;
}

.hud-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.hud-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.95rem;
  background: rgba(10, 20, 14, 0.65);
  border: 1px solid rgba(0, 255, 102, 0.28);
  border-radius: 9999px;
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.hud-btn:hover {
  background: rgba(0, 255, 102, 0.12);
  border-color: var(--matrix-green);
  color: #ffffff;
  box-shadow: 0 0 14px rgba(0, 255, 102, 0.35);
  transform: translateY(-1px);
}

.hud-icon {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

/* HUD Bottom Bar */
.hud-bottom {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  transition: opacity 0.4s ease, transform 0.4s ease;
  pointer-events: auto;
}

.hud-themes {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.theme-dot {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background-color: var(--dot-color);
  cursor: pointer;
  opacity: 0.45;
  transition: all 0.2s ease;
  outline: none;
}

.theme-dot:hover {
  opacity: 0.85;
  transform: scale(1.2);
}

.theme-dot.active {
  opacity: 1;
  border-color: #ffffff;
  box-shadow: 0 0 10px var(--dot-color);
  transform: scale(1.2);
}

.hud-privacy {
  margin-left: 0.5rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.75rem;
  opacity: 0.5;
  transition: opacity 0.2s ease;
}

.hud-privacy:hover {
  opacity: 1;
  color: var(--text-main);
}

.hud-hints {
  color: var(--text-muted);
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  opacity: 0.7;
}

.hud-hints .sep {
  opacity: 0.4;
}

.hud-tools {
  display: flex;
  align-items: center;
}

.hud-icon-btn {
  background: rgba(10, 20, 14, 0.65);
  border: 1px solid rgba(0, 255, 102, 0.25);
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 0.35rem 0.65rem;
  cursor: pointer;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all 0.2s ease;
  outline: none;
}

.hud-icon-btn:hover {
  border-color: var(--matrix-green);
  color: #ffffff;
  box-shadow: 0 0 10px rgba(0, 255, 102, 0.3);
}

/* Zen Screensaver Auto-Hide Mode */
body.hud-hidden {
  cursor: none;
}

body.hud-hidden .hud-top {
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
}

body.hud-hidden .hud-bottom {
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
}

/* Responsive adjustments for mobile devices */
@media (max-width: 768px) {
  .hud-top {
    padding: 1rem 1.25rem;
    flex-direction: column;
    gap: 0.85rem;
    align-items: flex-start;
  }

  .hud-actions {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .hud-btn {
    padding: 0.35rem 0.75rem;
    font-size: 0.78rem;
  }

  .hud-bottom {
    padding: 1rem 1.25rem;
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .hud-hints {
    display: none;
  }
}