body {
    margin: 0;
    overflow-x: hidden;
    background-color: #01000a;
    color: #ffffff;
    font-family: 'Inter', sans-serif;
}

#bg-video {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    object-fit: cover;
    z-index: 0;
    pointer-events: none;
}

/* Colour wash that changes with each era */
#tint {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: rgba(255, 106, 26, 0.18);
    transition: background 2s ease;
}

/* Soft dark edges, like looking through a spacecraft window */
#vignette {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: radial-gradient(ellipse at center, transparent 55%, rgba(1, 0, 10, 0.75) 100%);
}

.content-section {
    position: relative;
    z-index: 10;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 2rem;
}

.glass-card {
    background: rgba(10, 8, 30, 0.55);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.125);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #01000a; }
::-webkit-scrollbar-thumb { background: #7303c0; border-radius: 4px; }


/* =====================================================
   TOP NAV (Cosmotrace) - floating pill bar
   [logo] Name [three lines -> X]
   Tap the button: lines become an X and a card drops
   down from the top like a popup.
   ===================================================== */
:root {
    color-scheme: dark;        /* page is already dark: stops phone browsers' auto dark mode from dimming white parts */
    --nav-accent-1: #7c3aed;   /* purple */
    --nav-accent-2: #ec4899;   /* pink   */
    --nav-glass: rgba(10, 8, 30, 0.78);
    --nav-line: rgba(255, 255, 255, 0.10);
}
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
.site-nav, .site-nav * { box-sizing: border-box; }

.site-nav {
    position: fixed;
    top: 14px;
    left: 0;
    right: 0;
    z-index: 40;
    padding: 0 14px;
    pointer-events: none;           /* only the bar / panel catch taps */
}
.nav-bar, .nav-panel { pointer-events: auto; max-width: 720px; margin-left: auto; margin-right: auto; }

.nav-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    height: 64px;
    padding: 0 8px 0 10px;
    border-radius: 999px;
    background: var(--nav-glass);
    border: 1px solid var(--nav-line);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    color: #fff;
    text-decoration: none;
    margin-right: auto;
}
/* round accent chip, same idea as the round icon in the reference */
.nav-logo {
    flex: none;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--nav-accent-1), var(--nav-accent-2));
    box-shadow: 0 0 18px rgba(168, 85, 247, 0.55);
}
.nav-logo img { display: block; width: 24px; height: 24px; object-fit: contain; }
.nav-name {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

/* three lines <-> X */
.nav-toggle {
    flex: none;
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    padding: 0;
    color: #fff;
    background: transparent;
    border: 0;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}
.nav-toggle-lines { position: relative; display: block; width: 24px; height: 18px; color: #fff; }
.nav-toggle-lines span {
    position: absolute;
    left: 0;
    width: 100%;
    height: 2.5px;
    border-radius: 3px;
    background: #ffffff;
    box-shadow: 0 0 0 0.5px rgba(255,255,255,0.35);
    opacity: 1;
    forced-color-adjust: none;
    transition: top 0.3s ease, transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.2s ease;
}
.nav-toggle-lines span:nth-child(1) { top: 0; }
.nav-toggle-lines span:nth-child(2) { top: 7.75px; }
.nav-toggle-lines span:nth-child(3) { top: 15.5px; }
.site-nav.is-open .nav-toggle-lines span:nth-child(1) { top: 7.75px; transform: rotate(45deg); }
.site-nav.is-open .nav-toggle-lines span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.site-nav.is-open .nav-toggle-lines span:nth-child(3) { top: 7.75px; transform: rotate(-45deg); }

/* drop-down card */
.nav-panel {
    margin-top: 10px;
    max-height: calc(100dvh - 104px);
    overflow-y: auto;
    padding: 26px 20px 22px;
    border-radius: 28px;
    background: rgba(10, 8, 30, 0.92);
    border: 1px solid var(--nav-line);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.55);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-18px) scale(0.98);
    transform-origin: top center;
    transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.25s ease, visibility 0s linear 0.35s;
}
.site-nav.is-open .nav-panel {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    transition-delay: 0s;
}
.nav-links { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; align-items: center; gap: 4px; }
.nav-link {
    display: block;
    padding: 14px 18px;
    text-align: center;
    font-size: 1.15rem;
    font-weight: 600;
    color: #9ca3af;
    text-decoration: none;
    border-radius: 14px;
    transition: color 0.2s ease, background 0.2s ease;
}
.nav-link small { display: block; margin-top: 2px; font-size: 0.72rem; font-weight: 500; color: rgba(255,255,255,0.38); }
.nav-link:hover, .nav-link.is-active { color: #fff; background: rgba(255, 255, 255, 0.06); }
.nav-link.is-active { color: #d8b4fe; }

.nav-meta {
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px solid var(--nav-line);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.nav-era { display: flex; flex-direction: column; gap: 2px; }
.nav-era-name { font-size: 0.9rem; font-weight: 600; color: #fff; }
.nav-era-time { font-size: 0.78rem; font-weight: 600; color: #fbbf24; }
.nav-audio {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 10px 16px; border-radius: 999px;
    border: 1px solid rgba(167, 139, 250, 0.4);
    background: rgba(88, 28, 135, 0.35);
    color: #e9d5ff;
    font: 500 0.8rem/1 'Inter', sans-serif;
    cursor: pointer;
}
.nav-audio:hover { background: rgba(107, 33, 168, 0.55); }

/* dim layer behind the open panel */
.nav-backdrop {
    position: fixed; inset: 0; z-index: 39;
    background: rgba(1, 0, 10, 0.55);
    backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px);
    opacity: 0; visibility: hidden;
    transition: opacity 0.3s ease, visibility 0s linear 0.3s;
}
.nav-backdrop.is-open { opacity: 1; visibility: visible; transition-delay: 0s; }

.nav-toggle:focus-visible, .nav-link:focus-visible, .nav-brand:focus-visible,
.nav-audio:focus-visible { outline: 2px solid #c4b5fd; outline-offset: 2px; }

/* small phones: keep everything inside the pill */
@media (max-width: 420px) {
    .site-nav { padding: 0 10px; }
    .nav-bar { gap: 6px; height: 60px; padding: 0 6px 0 8px; }
    .nav-logo { width: 38px; height: 38px; }
    .nav-logo img { width: 22px; height: 22px; }
    .nav-name { font-size: 1.05rem; }
    .nav-toggle { width: 34px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .nav-panel, .nav-backdrop, .nav-toggle-lines span { transition: none; }
}

/* load / error notice */
#load-error { position: relative; z-index: 10; margin: 120px auto; max-width: 520px; padding: 24px; text-align: center; border-radius: 20px; }

/* =====================================================
   FOOTER (content: footer.json)
   ===================================================== */
.site-footer { background: #05040f; color: #9ca3af; font-family: 'Inter', sans-serif; }
.site-footer, .site-footer * { box-sizing: border-box; }
.ft-cta { padding: 72px 20px 64px; text-align: center; border-bottom: 1px solid rgba(255,255,255,0.07);
    background: radial-gradient(ellipse at 50% 0%, rgba(124,58,237,0.18), transparent 65%); }
.ft-cta h2 { margin: 0 0 24px; font-size: clamp(1.5rem, 5vw, 2.4rem); font-weight: 800; letter-spacing: -0.02em; color: #fff; }
.ft-main { max-width: 1100px; margin: 0 auto; padding: 40px 20px 22px; }
.ft-bottom { margin-top: 0; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.07);
    display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 16px; font-size: 0.78rem; }
.ft-heart { color: #ec4899; font-weight: 400; }