:root {
  --bg-a: #081218;
  --bg-b: #0e1f2a;
  --card: rgba(9, 21, 29, 0.9);
  --line: rgba(161, 206, 227, 0.25);
  --line-strong: rgba(161, 206, 227, 0.45);
  --ink: #ebf7ff;
  --muted: #a2c0d2;
  --accent: #5ff0cf;
  --accent-2: #79b9ff;
  --warn: #ffd394;
  --danger: #ff9c9c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Segoe UI Variable Text", "Trebuchet MS", sans-serif;
  background: radial-gradient(circle at 12% 10%, rgba(121, 185, 255, 0.22), transparent 26%),
    radial-gradient(circle at 86% 14%, rgba(95, 240, 207, 0.2), transparent 28%),
    linear-gradient(172deg, var(--bg-a), var(--bg-b));
}

.hidden {
  display: none !important;
}

.home-page {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(2, 8, 12, 0.76);
  backdrop-filter: blur(4px);
}

.home-card {
  width: min(880px, 95vw);
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: rgba(5, 14, 20, 0.95);
  box-shadow: 0 24px 44px rgba(0, 0, 0, 0.38);
}

.home-banner {
  width: 100%;
  height: clamp(130px, 25vw, 230px);
  object-fit: cover;
  display: block;
}

.home-content {
  display: grid;
  gap: 10px;
  padding: 16px;
}

.home-content h1 {
  margin: 0;
  font-size: 1.5rem;
}

.home-content p {
  margin: 0;
  color: var(--muted);
}

.home-logo {
  width: 76px;
  height: 76px;
  border-radius: 12px;
  border: 1px solid var(--line);
  object-fit: cover;
}

.remember-row {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

#enter-btn {
  width: fit-content;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink);
  background: linear-gradient(120deg, rgba(95, 240, 207, 0.25), rgba(121, 185, 255, 0.28));
  padding: 9px 18px;
  font-weight: 700;
  cursor: pointer;
}

.app-shell {
  max-width: 1320px;
  margin: 0 auto;
  padding: 14px;
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 12px;
}

.hero {
  grid-column: 1 / 3;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
  padding: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-logo {
  width: 54px;
  height: 54px;
  border-radius: 11px;
  object-fit: cover;
  border: 1px solid var(--line);
}

.hero-copy h2 {
  margin: 0;
  letter-spacing: 0.06em;
}

.hero-copy p {
  margin: 2px 0 0;
  color: var(--muted);
}

.stage-card,
.control-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
}

.stage-card {
  min-height: 620px;
  padding: 10px;
}

.mirror-stage {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  border-radius: 12px;
  background: #000;
  transform: scaleX(-1);
}

#input-video,
#overlay-canvas,
.mini-window-host,
.startup-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

#input-video {
  object-fit: cover;
}

.mini-window-host {
  pointer-events: none;
}

.mini-gesture-window {
  position: absolute;
  top: 14px;
  right: 14px;
  width: min(250px, 42%);
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  background: rgba(7, 15, 20, 0.9);
  overflow: hidden;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.42);
  transform: scaleX(-1);
  opacity: 1;
  transition: opacity 120ms ease, transform 120ms ease;
}

.mini-gesture-window.switching {
  opacity: 0.2;
  transform: scaleX(-1) scale(0.93);
}

.mini-gesture-image {
  display: block;
  width: 100%;
  height: 150px;
  object-fit: cover;
}

.mini-gesture-title {
  padding: 8px 10px 0;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

.mini-gesture-hint {
  padding: 5px 10px 10px;
  color: var(--muted);
  font-size: 0.76rem;
}

.startup-overlay {
  display: grid;
  place-items: center;
  background: rgba(2, 8, 12, 0.52);
  backdrop-filter: blur(2px);
  transform: scaleX(-1);
}

.startup-text {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 10px 16px;
  background: rgba(6, 16, 23, 0.9);
  color: var(--ink);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
}

.control-card {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 12px;
}

.control-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 8px;
  align-items: center;
}

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

.settings-btn {
  width: 100%;
}

.toggle-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
}

label {
  color: var(--muted);
  font-size: 0.83rem;
}

select,
button {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(5, 13, 19, 0.95);
  color: var(--ink);
  padding: 9px 10px;
  font-size: 0.83rem;
}

button {
  cursor: pointer;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.status-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px;
  background: rgba(3, 11, 16, 0.62);
}

.status-line {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 6px;
}

.status-line:first-child {
  margin-top: 0;
}

.status-label {
  color: var(--muted);
  font-size: 0.82rem;
}

.status-value {
  font-weight: 600;
  color: var(--accent);
}

.status-message {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.4;
  color: var(--muted);
}

.status-message.warning {
  color: var(--warn);
}

.status-message.error {
  color: var(--danger);
}

.modal-sheet {
  position: fixed;
  inset: 0;
  z-index: 55;
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(2, 8, 12, 0.7);
  backdrop-filter: blur(3px);
}

.sheet-card {
  width: min(540px, 94vw);
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: rgba(6, 16, 23, 0.96);
  padding: 14px;
  display: grid;
  gap: 10px;
}

.sheet-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
}

.sheet-head h3 {
  margin: 0;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.88rem;
  color: var(--accent);
}

.privacy-note,
.version-row,
.support-status {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.support-status.warning {
  color: var(--warn);
}

.support-status.error {
  color: var(--danger);
}

.tour-card {
  width: min(500px, 92vw);
}

.tour-card h3 {
  margin: 0;
}

.tour-card p {
  margin: 0;
  color: var(--muted);
}

@media (max-width: 1080px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .hero {
    grid-column: auto;
  }

  .stage-card {
    min-height: 430px;
  }
}

@media (max-width: 740px) {
  .app-shell {
    padding: 10px;
  }

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

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