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

:root {
  --bg: #000;
  --fg: #fff;
  --pad: 18px;
}

body {
  font-family: Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
}

/* Topbar */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding: 18px var(--pad);
  z-index: 10;
  display: flex;
  justify-content: center;
  transition: transform 260ms ease, opacity 260ms ease;
}

.topbar.hide {
  transform: translateY(-10px);
  opacity: 0;
}

/* centered nav */
.nav {
  display: inline-flex;
  gap: 14px;
  align-items: center;
}

/* BIG pills: white with inner black border */
.pill {
  border: 0;
  background: #fff;
  color: #000;
  cursor: pointer;
  padding: 16px 22px;
  border-radius: 999px;
  font-size: 15px;
  letter-spacing: 0.02em;
  text-transform: lowercase;

  /* inner border */
  box-shadow: inset 0 0 0 2px #000;
  transition: transform 170ms ease, opacity 170ms ease;
}

.pill:hover { transform: translateY(-1px); }
.pill:active { transform: translateY(0); opacity: 0.85; }

/* page stage */
.stage {
  min-height: 200vh; /* gives you scroll so the hide effect is visible */
  display: grid;
  place-items: center;
  padding: 110px var(--pad) 40px;
}

.mark {
  font-size: 13px;
  letter-spacing: 0.10em;
  text-transform: lowercase;
  opacity: 0.45;
}

.spacer {
  height: 120vh; /* extra empty space so scroll feels intentional */
}

/* Window modal */
.modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(0,0,0,0.55);
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease;
  z-index: 20;
}

.modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.window {
  width: min(520px, calc(100vw - 28px));
  border-radius: 18px;
  background: #fff;
  color: #000;
  box-shadow: 0 22px 70px rgba(0,0,0,0.35);
  overflow: hidden;
  transform: translateY(10px);
  transition: transform 220ms ease;
}

.modal.is-open .window {
  transform: translateY(0);
}

.titlebar {
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px 0 14px;
  box-shadow: inset 0 -1px 0 rgba(0,0,0,0.12);
}

.title {
  font-size: 13px;
  letter-spacing: 0.04em;
  opacity: 0.75;
  text-transform: uppercase;
}

.close {
  width: 36px;
  height: 30px;
  border: 0;
  background: transparent;
  color: #000;
  cursor: pointer;
  border-radius: 10px;
  font-size: 22px;
  line-height: 1;
  opacity: 0.6;
  transition: background 160ms ease, opacity 160ms ease;
}

.close:hover {
  opacity: 1;
  background: rgba(0,0,0,0.06);
}

.content {
  padding: 22px 18px 20px;
  text-align: center;
}

.big {
  font-size: 16px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.small {
  margin-top: 10px;
  font-size: 13px;
  opacity: 0.65;
}

/* Mobile */
@media (max-width: 600px) {
  :root { --pad: 14px; }
  .nav { gap: 10px; }
  .pill { padding: 14px 18px; font-size: 14px; }
  .stage { padding-top: 104px; }
}