:root {
  color-scheme: dark;
  --ink: #f8f3e7;
  --muted: #b8c6bd;
  --panel: rgba(13, 22, 19, 0.78);
  --panel-strong: rgba(6, 14, 12, 0.9);
  --line: rgba(248, 243, 231, 0.18);
  --accent: #e6ff72;
  --accent-ink: #172017;
  --danger: #ff8f70;
  font-family: "Avenir Next", "Trebuchet MS", Verdana, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 30% 20%, rgba(230, 255, 114, 0.12), transparent 34%),
    linear-gradient(145deg, #07100e 0%, #17231e 52%, #101619 100%);
  color: var(--ink);
}

button,
input {
  font: inherit;
}

.stage {
  position: relative;
  width: 100vw;
  height: 100dvh;
  min-height: 100vh;
  overflow: hidden;
}

#camera {
  display: none;
}

#output {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: #07100e;
  object-fit: cover;
}

.permission-panel {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: center;
  gap: 16px;
  padding: 28px;
  background:
    linear-gradient(rgba(7, 16, 14, 0.35), rgba(7, 16, 14, 0.7)),
    repeating-linear-gradient(90deg, rgba(248, 243, 231, 0.035) 0 1px, transparent 1px 26px);
  transition: opacity 180ms ease, visibility 180ms ease;
  z-index: 4;
}

.permission-panel.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  max-width: 680px;
  margin: 0;
  font-size: clamp(2.4rem, 9vw, 5.6rem);
  line-height: 0.92;
  letter-spacing: 0;
}

#statusText {
  max-width: 560px;
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.5;
}

.primary-action,
.button-row button,
.mode-button {
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: rgba(248, 243, 231, 0.08);
  cursor: pointer;
  min-height: 44px;
}

.primary-action {
  width: min(100%, 260px);
  border-color: transparent;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 800;
}

.controls {
  position: absolute;
  left: max(12px, env(safe-area-inset-left));
  right: max(12px, env(safe-area-inset-right));
  bottom: max(12px, env(safe-area-inset-bottom));
  z-index: 3;
  display: grid;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  backdrop-filter: blur(18px) saturate(1.25);
  box-shadow: 0 18px 70px rgba(0, 0, 0, 0.28);
}

.mode-toggle {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.mode-button {
  padding: 0 8px;
  font-weight: 800;
  font-size: 0.9rem;
  line-height: 1.05;
}

.mode-button.active {
  border-color: transparent;
  background: var(--accent);
  color: var(--accent-ink);
}

.control-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

label {
  display: grid;
  gap: 5px;
  min-width: 0;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr 0.7fr;
  gap: 8px;
}

.button-row button {
  padding: 0 10px;
  background: var(--panel-strong);
}

.button-row .save-action {
  border-color: rgba(230, 255, 114, 0.34);
}

.button-row .stop-action {
  color: var(--danger);
}

@media (min-width: 820px) {
  .controls {
    left: 50%;
    right: auto;
    width: min(940px, calc(100vw - 32px));
    transform: translateX(-50%);
    grid-template-columns: 300px 1fr 260px;
    align-items: center;
  }

  .button-row {
    grid-template-columns: 1fr 1fr 0.7fr;
  }
}

@media (max-width: 430px) {
  .permission-panel {
    padding: 22px;
    padding-bottom: 210px;
  }

  .control-grid {
    grid-template-columns: 1fr;
  }
}