/* ==========================================================================
   Layout
   Page atmosphere (fixed gradient orbs + grain), sticky header / nav,
   hero, section rhythm, footer structure, scroll progress, back-to-top.
   Structural only — component styling lives in components.css.
   ========================================================================== */

/* --- Page atmosphere --- */
body::before
{
    content: "";
    position: fixed;
    inset: -20% -10% auto;
    height: 70vh;
    background:
        radial-gradient(46% 60% at 18% 12%, var(--glow-a), transparent 62%),
        radial-gradient(40% 55% at 82% 4%, var(--glow-b), transparent 60%);
    pointer-events: none;
    z-index: 1;
    filter: blur(6px);
    animation: drift 26s ease-in-out infinite alternate;
}

body::after
{
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    opacity: var(--grain-opacity);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

@keyframes drift
{
    from { transform: translate3d(-2%, 0, 0) scale(1); }
    to   { transform: translate3d(3%, 4%, 0) scale(1.08); }
}

/* --- Scroll progress --- */
.scroll-progress
{
    position: fixed;
    top: 0; left: 0;
    height: 2px;
    width: 0;
    z-index: 9998;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-bright), var(--color-gold));
    box-shadow: 0 0 12px var(--color-accent-glow);
    transition: width 0.1s linear;
}

/* --- Header / navigation --- */
.site-header
{
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    height: var(--header-h);
    display: flex;
    align-items: center;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.site-header.is-scrolled
{
    background: var(--color-surface-glass);
    backdrop-filter: blur(14px) saturate(140%);
    -webkit-backdrop-filter: blur(14px) saturate(140%);
    border-bottom-color: var(--color-border);
}

/* Three-track grid: logo hard left, menu dead-centre in the bar, drawer
   toggle hard right. The empty 1fr side tracks are what actually centre
   the menu — so it stays centred on desktop even though the toggle is
   display:none there, and on mobile the fixed drawer collapses the
   middle track to zero width without pulling the toggle off the right. */
.nav-inner
{
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 20px;
}
.nav-inner > nav { justify-self: center; }

.nav-logo
{
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-primary);
    white-space: nowrap;
    transition: var(--transition);
}
.nav-logo span { color: var(--color-accent); }
.nav-logo:hover { color: var(--color-accent); }

.nav-links
{
    display: flex;
    align-items: center;
    gap: clamp(14px, 2.4vw, 34px);
}

.nav-link
{
    position: relative;
    font-size: var(--fs-sm);
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    padding-block: 6px;
    transition: var(--transition);
}
.nav-link::after
{
    content: "";
    position: absolute;
    left: 0; bottom: 0;
    width: 0; height: 1.5px;
    background: var(--color-accent);
    transition: width 0.3s ease;
}
.nav-link:hover,
.nav-link.is-active { color: var(--color-text-primary); }
.nav-link:hover::after,
.nav-link.is-active::after { width: 100%; }

/* --- Theme toggle --- */
.theme-toggle
{
    position: relative;
    width: 36px; height: 36px;
    display: grid;
    place-items: center;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background: var(--color-surface-glass);
    color: var(--color-text-secondary);
    transition: var(--transition);
}
.theme-toggle:hover
{
    color: var(--color-accent);
    border-color: var(--color-accent);
    transform: rotate(18deg);
}
.theme-toggle .icon { width: 16px; height: 16px; position: absolute; transition: opacity 0.25s ease, transform 0.35s ease; }
.theme-toggle .icon-sun  { opacity: 1; transform: scale(1); }
.theme-toggle .icon-moon { opacity: 0; transform: scale(0.5) rotate(-60deg); }
.theme-toggle.is-light .icon-sun  { opacity: 0; transform: scale(0.5) rotate(60deg); }
.theme-toggle.is-light .icon-moon { opacity: 1; transform: scale(1) rotate(0); }

/* --- Mobile toggle (hidden on desktop) --- */
.nav-toggle
{
    display: none;
    position: relative;
    width: 40px; height: 40px;
    justify-self: end;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    place-items: center;
}
.nav-toggle .icon { width: 20px; height: 20px; position: absolute; transition: var(--transition); }
.nav-toggle .icon-close { opacity: 0; transform: rotate(-90deg) scale(0.6); }
.nav-toggle[aria-expanded="true"] .icon-menu  { opacity: 0; transform: rotate(90deg) scale(0.6); }
.nav-toggle[aria-expanded="true"] .icon-close { opacity: 1; transform: none; }

/* --- Hero --- */
.hero
{
    position: relative;
    z-index: 2;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(var(--header-h) + 48px) 0 72px;
    overflow: hidden;
}

.hero-glow
{
    position: absolute;
    top: 50%; left: 50%;
    width: min(760px, 92vw);
    aspect-ratio: 1;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, var(--color-accent-glow), transparent 66%);
    opacity: 0.4;
    filter: blur(40px);
    z-index: -1;
    animation: pulse 7s ease-in-out infinite;
}

/* Album art layered behind the shadow/glow at the top of the page.
   One pseudo-element carries three background layers, painted back to
   front: the 3000x3000 cover, a top/bottom fade that dissolves it into
   the page background, and a soft core scrim that keeps the logotype
   readable where it sits. z-index -3 puts it under .hero-glow (-1) and
   under the content, so the glow still blooms over the art. */
.hero::before
{
    content: "";
    position: absolute;
    inset: 0;
    z-index: -3;
    pointer-events: none;
    background-image:
        radial-gradient(58% 46% at 50% 46%, var(--hero-scrim), transparent 72%),
        linear-gradient(180deg,
            var(--color-bg-deep) 0%,
            transparent 26%,
            transparent 54%,
            var(--color-bg-deep) 100%),
        url("../images/Jarvik%26Company_Rise_Again_3000x3000_extended.png?0002");
    background-position: center, center, center 34%;
    background-size: auto, auto, cover;
    background-repeat: no-repeat;
}

@keyframes pulse
{
    0%, 100% { opacity: 0.28; transform: translate(-50%, -50%) scale(1); }
    50%      { opacity: 0.5;  transform: translate(-50%, -50%) scale(1.07); }
}

.hero-inner { position: relative; }

.logo
{
    font-size: clamp(2.4rem, 8vw, 5.4rem);
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--color-text-primary);
    text-indent: 0.22em;
    line-height: 1.1;
    text-shadow: 0 0 26px var(--color-accent-glow);
    animation: glowPulse 4.5s ease-in-out infinite;
}
.logo .amp { color: var(--color-accent); }

@keyframes glowPulse
{
    0%, 100% { text-shadow: 0 0 22px var(--color-accent-glow); }
    50%      { text-shadow: 0 0 46px var(--color-accent-glow), 0 0 90px var(--color-accent-glow); }
}

.hero-desc
{
    max-width: 620px;
    margin: 26px auto 0;
    color: var(--color-text-primary);
    font-size: clamp(1rem, 2vw, 1.16rem);
    font-weight: 700;
    letter-spacing: 0.01em;
    text-shadow: 0 1px 18px var(--color-accent-glow);
}

.hero-actions
{
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    margin-top: 38px;
}

.scroll-cue
{
    position: absolute;
    bottom: 28px; left: 50%;
    transform: translateX(-50%);
    width: 26px; height: 42px;
    border: 1.5px solid var(--color-border-strong);
    border-radius: 999px;
    display: grid;
    justify-items: center;
    padding-top: 8px;
    transition: var(--transition);
}
.scroll-cue span
{
    width: 3px; height: 8px;
    border-radius: 999px;
    background: var(--color-accent);
    animation: cue 1.8s ease-in-out infinite;
}
.scroll-cue:hover { border-color: var(--color-accent); }

@keyframes cue
{
    0%   { opacity: 0; transform: translateY(-4px); }
    40%  { opacity: 1; }
    100% { opacity: 0; transform: translateY(14px); }
}

/* --- Footer --- */
.footer
{
    position: relative;
    z-index: 2;
    background: var(--color-bg-primary);
    border-top: 1px solid var(--color-border-glow);
    padding-block: clamp(64px, 8vw, 96px);
    text-align: center;
}
.footer .section-title { font-size: clamp(1.7rem, 3.6vw, 2.5rem); }

.footer-copy
{
    margin-top: 34px;
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
    letter-spacing: 0.06em;
}

/* --- Back to top --- */
.back-to-top
{
    position: fixed;
    right: 22px; bottom: 22px;
    z-index: 9998;
    width: 46px; height: 46px;
    display: grid;
    place-items: center;
    border-radius: 999px;
    background: var(--color-surface-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    opacity: 0;
    visibility: hidden;
    transform: translateY(14px);
    transition: var(--transition);
}
.back-to-top .icon { width: 18px; height: 18px; }
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.back-to-top:hover
{
    color: var(--color-bg-deep);
    background: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-3px);
}