:root {
  --stage-width: 3840;
  --stage-height: 2160;

  --bg: #000028;
  --text: #ffffff;
  --nav-bg: rgba(255, 255, 255, 0.08);
  --nav-border: rgba(255, 255, 255, 0.14);
  --overlay-bg: rgba(0, 0, 40, 0.98);
  --hover: rgba(255, 255, 255, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* Fixed logical stage, scaled by JS */
.stage {
  position: absolute;
  top: 50%;
  left: 50%;
  width: calc(var(--stage-width) * 1px);
  height: calc(var(--stage-height) * 1px);
  overflow: hidden;
  background: var(--bg);
  transform: translate(-50%, -50%);
  transform-origin: center center;
}

/* Future video layer */
.video-container {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    url("../graphic/Placeholder.svg") center center / cover no-repeat,
    #000028;
}

.video-container video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-tint {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: rgba(0, 0, 40, 0.14);
  pointer-events: none;
}

.page {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  padding: 64px 72px;
}

.heading img {
  height: 72px;
  width: auto;
  display: block;
}

.bottom-nav {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 88px;
  z-index: 3;

  display: flex;
  justify-content: space-between;
  align-items: center;

  padding: 32px 56px;
  background: var(--nav-bg);
  border-top: 1px solid var(--nav-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.nav-title {
  font-size: 42px;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.01em;
}

.maximize-btn {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #fff;
  padding: 18px 26px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 34px;
  font-weight: 600;
  transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.maximize-btn:hover {
  background: var(--hover);
  border-color: rgba(255, 255, 255, 0.28);
  transform: translateY(-1px);
}

.maximize-btn svg {
  width: 38px;
  height: 38px;
  display: block;
}

.overlay {
  position: absolute;
  inset: 0;
  z-index: 20;

  display: flex;
  align-items: center;
  justify-content: center;
  padding: 64px;

  background: rgba(0, 0, 40, 0.72);

  opacity: 0;
  visibility: hidden;
  pointer-events: none;

  transform: translateY(140px);
  transition:
    opacity 0.45s ease,
    transform 0.45s ease,
    visibility 0.45s ease;
}

.overlay.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.overlay-content {
  position: relative;
  width: 100%;
  height: 100%;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.04);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);

  opacity: 0;
  transform: translateY(80px);
  transition:
    opacity 0.45s ease,
    transform 0.45s ease;
}

.overlay.active .overlay-content {
  opacity: 1;
  transform: translateY(0);
}

.overlay-text {
  font-size: 96px;
  font-weight: 700;
  text-align: center;
  opacity: 0.9;
}

.close-btn {
  position: absolute;
  top: 32px;
  right: 32px;
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  padding: 18px 24px;
  cursor: pointer;
  font-size: 32px;
  font-weight: 600;
}

.close-btn:hover {
  background: var(--hover);
}