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

:root {
  --bg: #0f0f1a;
  --surface: #1a1a2e;
  --border: #2a2a4a;
  --text: #e0e0e0;
  --accent: #00d4ff;
  --accent-hover: #00b8e6;
  --control-bg: #16213e;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ---- Hidden webcam video ---- */
#webcam {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

/* ---- Controls header ---- */
#controls {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

#controls-bar {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.6rem 1rem;
}

#controls h1 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--accent);
  white-space: nowrap;
}

#btn-menu {
  display: none;
  margin-left: auto;
  background: transparent;
  color: var(--text);
  font-size: 1.3rem;
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--border);
}

#controls-drawer {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0 1rem 0.6rem;
  flex-wrap: wrap;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.control-group label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #8888aa;
  white-space: nowrap;
}

/* ---- Buttons ---- */
button {
  background: var(--accent);
  color: #000;
  border: none;
  padding: 0.4rem 0.9rem;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

button:hover {
  background: var(--accent-hover);
}

button:disabled {
  opacity: 0.35;
  cursor: default;
}

button:disabled:hover {
  background: var(--accent);
}

/* ---- Range sliders ---- */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 90px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: var(--accent);
  border: none;
  border-radius: 50%;
  cursor: pointer;
}

.control-group span {
  font-size: 0.75rem;
  min-width: 2rem;
  color: #8888aa;
}

/* ---- Select ---- */
select {
  background: var(--control-bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
  font-size: 0.78rem;
  cursor: pointer;
}

select:focus {
  outline: 1px solid var(--accent);
}

/* ---- Toggles / checkboxes ---- */
.toggles {
  gap: 0.8rem;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  cursor: pointer;
  color: var(--text);
}

.toggle-label input[type="checkbox"] {
  accent-color: var(--accent);
  width: 15px;
  height: 15px;
  cursor: pointer;
}

/* ---- ASCII output area ---- */
#output-area {
  flex: 1;
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
}

#ascii-output {
  font-family: "Courier New", Courier, monospace;
  font-size: 8px;
  line-height: 1;
  letter-spacing: 0.05em;
  white-space: pre;
  color: var(--text);
  user-select: text;
}

/* ---- Responsive ---- */
@media (max-width: 700px) {
  #controls-bar {
    padding: 0.5rem 0.6rem;
  }

  #btn-menu {
    display: inline-block;
  }

  #controls-drawer {
    display: none;
    gap: 0.6rem;
    padding: 0.4rem 0.6rem 0.6rem;
  }

  #controls-drawer.open {
    display: flex;
  }

  input[type="range"] {
    width: 60px;
  }

  #controls h1 {
    font-size: 0.95rem;
  }
}