:root{
    --bg:#fff;
    --ink:#000;
    --muted: rgba(0,0,0,.55);
    --line: rgba(0,0,0,.22);
    --line2: rgba(0,0,0,.14);
    --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    --sans: Arial, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box;}
html,body{height:100%;}
body{
    background: var(--bg);
    color: var(--ink);
    font-family: var(--sans);
    overflow-x:hidden;
}

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

/* top nav */
.top-nav{
    position:fixed;
    top:18px;
    left:18px;
    right:18px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    z-index:20;
}
.top-nav .nav-right{display:flex; gap:12px; align-items:center;}
.nav-btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-width: 150px;
    height: 56px;
    padding: 0 18px;
    border: 2px solid var(--ink);
    background: transparent;
    color: var(--ink);
    text-decoration:none;
    font-size: 14px;
    letter-spacing:.4px;
    user-select:none;
    transition: transform .12s ease, background .2s ease, opacity .2s ease;
}
.nav-btn:hover{ background: rgba(0,0,0,.04); transform: translateY(-1px); }
.nav-btn:active{ transform: translateY(0); opacity:.85; }

.shell{
    position:relative;
    z-index:5;
    width:min(1100px, calc(100vw - 40px));
    margin: 0 auto;
    padding: 110px 0 44px;
}

.mono{ font-family: var(--mono); letter-spacing:.6px; }

/* hero */
.hero{
    position:relative;
    padding: 26px 24px 22px;
    border: 1px solid var(--line);
    background: rgba(255,255,255,.78);
    backdrop-filter: blur(4px);
}
.kicker{
    font-size: 12px;
    text-transform: uppercase;
    color: var(--muted);
}
.title{
    margin-top:10px;
    font-size: clamp(28px, 4.2vw, 56px);
    line-height: 1.02;
    font-weight: 700;
    letter-spacing: .4px;
}
.title-sub{
    display:block;
    margin-top: 6px;
    font-size: clamp(18px, 2.2vw, 26px);
    font-weight: 400;
    color: var(--muted);
}
.meta{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin-top: 14px;
}
.pill{
    font-size: 12px;
    padding: 6px 10px;
    border: 1px solid var(--line);
    background: rgba(255,255,255,.65);
}
.lead{
    margin-top: 14px;
    max-width: 86ch;
    color: rgba(0,0,0,.72);
    line-height: 1.7;
}

/* scanline */
.scanline{
    pointer-events:none;
    position:absolute;
    inset:0;
    opacity:.18;
    background:
            repeating-linear-gradient(
                    to bottom,
                    rgba(0,0,0,.08) 0px,
                    rgba(0,0,0,.08) 1px,
                    transparent 1px,
                    transparent 7px
            );
    mask-image: linear-gradient(to bottom, transparent, #000 15%, #000 85%, transparent);
}

/* panels */
.panel{
    border: 1px solid var(--line);
    background: rgba(255,255,255,.78);
    backdrop-filter: blur(4px);
}
.panel-head{
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    gap:12px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--line2);
}
.panel-title{
    font-family: var(--mono);
    text-transform: uppercase;
    letter-spacing: 1.6px;
    font-size: 12px;
}
.panel-tag{
    font-family: var(--mono);
    font-size: 12px;
    color: var(--muted);
}
.copy{
    padding: 16px 16px 18px;
    line-height: 1.78;
    color: rgba(0,0,0,.78);
}
.copy p{ margin: 0 0 14px; }
.copy p:last-child{ margin-bottom:0; }

.copy .drop{
    font-size: 16px;
    color: rgba(0,0,0,.82);
}

.h2{
    margin: 20px 0 10px;
    font-family: var(--mono);
    letter-spacing: 1.2px;
    text-transform: uppercase;
    font-size: 13px;
}

.emph{
    border-left: 3px solid var(--ink);
    padding-left: 12px;
}
.warn{
    border-left: 3px solid rgba(0,0,0,.55);
    padding-left: 12px;
    color: rgba(0,0,0,.8);
}
.quiet{ color: rgba(0,0,0,.64); }

/* bullets */
.bullets{
    margin: 10px 0 14px 18px;
    padding: 0;
}
.bullets li{ margin: 6px 0; }

/* rail */
.rail{ margin-top: 16px; }
.rail-grid{
    padding: 12px 12px 14px;
    display:grid;
    grid-template-columns: repeat(6, minmax(120px, 1fr));
    gap: 10px;
}
.rail-item{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    padding: 12px 12px;
    border: 1px solid var(--line2);
    text-decoration:none;
    color: var(--ink);
    background: rgba(255,255,255,.65);
    transition: transform .12s ease, background .2s ease;
}
.rail-item:hover{ transform: translateY(-1px); background: rgba(0,0,0,.03); }
.rail-item.active{ border-color: var(--ink); }
.rail-code{ font-size: 12px; color: rgba(0,0,0,.6); }
.rail-name{ font-size: 13px; }
.rail-note{
    padding: 0 16px 14px;
    color: rgba(0,0,0,.55);
}

/* layout grid */
.grid{
    margin-top: 16px;
    display:grid;
    grid-template-columns: 1.35fr .65fr;
    gap: 14px;
}
.stack{ display:flex; flex-direction:column; gap:14px; }

.divider{
    height:1px;
    background: var(--line2);
    margin: 14px 0;
}

.small{
    font-size: 12.5px;
    color: rgba(0,0,0,.62);
}

/* artifacts */
.artifacts{
    list-style:none;
    padding:0;
    margin:0 0 10px;
    display:flex;
    flex-direction:column;
    gap:10px;
}
.artifact{
    border: 1px solid var(--line2);
    background: rgba(255,255,255,.65);
    padding: 10px 10px;
    transition: transform .12s ease, background .2s ease, border-color .2s ease, opacity .35s ease;
}
.artifact-head{
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: rgba(0,0,0,.72);
}
.artifact-desc{
    margin-top: 6px;
    font-size: 13px;
    color: rgba(0,0,0,.70);
    line-height: 1.55;
}
.artifact.active{
    border-color: var(--ink);
    background: rgba(0,0,0,.03);
    transform: translateY(-1px);
}
.artifact.decayed{
    opacity: .25;
    filter: blur(.2px);
}

/* actions */
.actions{
    display:flex;
    flex-direction:column;
    gap:10px;
    margin-top: 12px;
}
.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    height: 52px;
    border: 2px solid var(--ink);
    text-decoration:none;
    color: var(--ink);
    background: rgba(255,255,255,.72);
    font-size: 14px;
    transition: transform .12s ease, background .2s ease, opacity .2s ease;
}
.btn:hover{ background: rgba(0,0,0,.04); transform: translateY(-1px); }
.btn:active{ transform: translateY(0); opacity:.86; }
.btn.ghost{ background: transparent; }

/* footer */
.foot{ margin-top: 18px; padding: 18px 2px 0; }
.foot-line{ height:1px; background: var(--line); }
.foot-row{
    display:flex;
    justify-content:space-between;
    gap:12px;
    padding: 12px 2px 0;
    color: rgba(0,0,0,.55);
    font-size: 12px;
}

/* reveal */
.reveal{
    opacity:0;
    transform: translateY(8px);
    transition: opacity .6s ease, transform .6s ease;
}
.reveal.is-in{ opacity:1; transform: translateY(0); }

/* responsive */
@media (max-width: 980px){
    .rail-grid{ grid-template-columns: repeat(3, minmax(140px, 1fr)); }
    .grid{ grid-template-columns: 1fr; }
    .nav-btn{ min-width: 130px; height: 52px; }
}
@media (max-width: 560px){
    .top-nav{ top:12px; left:12px; right:12px; }
    .nav-btn{ min-width: 110px; height: 48px; font-size: 13px; padding: 0 12px;}
    .shell{ width: calc(100vw - 24px); padding-top: 92px; }
    .rail-grid{ grid-template-columns: repeat(2, minmax(140px, 1fr)); }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
    .scanline{ display:none; }
    .reveal{ transition:none; }
    .nav-btn, .btn, .rail-item, .artifact{ transition:none; }
}