html, body { height: 100%; margin: 0; background: #0b1a2b; }
.landing { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1.5rem; padding: 1rem; }
.landing[hidden], .viewer[hidden] { display: none; }
.landing-image { max-width: 100%; max-height: 75vh; object-fit: contain; }
.landing-actions { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; }
.landing-actions .btn { width: 12rem; }
.viewer { position: fixed; inset: 0; display: flex; flex-direction: column; background: #fff; }
.viewer-bar { display: flex; justify-content: space-between; padding: .4rem .6rem; background: #0b1a2b; }
.viewer iframe { flex: 1; width: 100%; border: 0; }
.landing-lang { position: fixed; top: .6rem; right: .8rem; color: #8fa3b8; font-size: .9rem; z-index: 1; }
.landing-lang a { color: #cfe0f2; text-decoration: none; }
.landing-lang a:hover { text-decoration: underline; }