* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; }

/* Fixed nav */
.topnav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  background: rgba(240,240,240,0.5);
  backdrop-filter: blur(10px);
}
.topnav__inner {
  display: flex;
  gap: 18px;
  padding: 14px 18px;
  border-bottom: 1px solid rgba(0,0,0,0.08);
}
.topnav__link {
  color: rgb(90,0,255);
  text-decoration: none;
  font-weight: 500;
}
.topnav__link:hover { text-decoration: underline; }
.topnav__link--active { text-decoration: underline; }

/* Hero (full viewport) */
.hero {
  height: 100vh;
  width: 100%;
  position: relative;
  padding-top: 5px; /* prevents nav overlap */
}
.hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.hero__overlay {
  position: absolute;
  left: 18px;
  bottom: 30px;
  color: white;
  text-shadow: 0 6px 20px rgba(0,0,0,0.45);
}
.hero__title { margin: 0 0 6px 0; font-size: clamp(32px, 5vw, 64px); }
.hero__subtitle { margin: 0; font-size: clamp(14px, 2vw, 18px); opacity: 0.95; }

/* Feed rows (full width, no cards, no borders) */
.feed { width: 100%; }

.row {
  width: 100%;
  min-height: 70vh;
  display: flex;
}
.row--reverse { flex-direction: row-reverse; }

/* alternating backgrounds */
.row--dark {
  background: #000;
  color: #fff;
}

.row--light {
  background: #fff;
  color: #000;
}

.row__media, .row__text {
  width: 50%;
  min-height: 70vh;
}

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

.row__text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 48px;
}

.row__title { margin: 0 0 12px 0; font-size: clamp(22px, 2.5vw, 36px); }
.row__desc { margin: 0 0 18px 0; font-size: 18px; opacity: 0.8; }
.row__content { font-size: 16px; line-height: 1.8; max-width: 60ch; }
.row__meta { margin-top: 24px; opacity: 0.6; font-size: 14px; }

.row__title,
.row__desc,
.row__content,
.row__meta {
  color: inherit;
}

.media-fallback { width: 100%; height: 100%; background: #eee; }

.empty { padding: 120px 18px; }

.footer { padding: 40px 18px; }
.footer a { color: #111; }

/* Mobile: stack */
@media (max-width: 900px) {
  .row, .row--reverse { flex-direction: column; }
  .row__media, .row__text { width: 100%; min-height: auto; }
  .row__media img, .row__media video { height: 55vh; }
  .row__text { padding: 24px; }
}