/* ==========================================================================
   Nexus Market — Darknet/Web3 UI (CSS-only)
   File: nexus.css
   ========================================================================== */

:root {
    --bg0: #05090c;
    --bg1: #081219;
    --bg2: #0c1822;
    --bg3: #0b1b26;

    --ink: #e8f6ff;
    --muted: #9dc0cf;
    --ink2: #bfeaff;

    --cyan: #35e1ff;
    --aqua: #00ffd0;
    --amber: #ffd36b;

    --brd: hsla(195, 60%, 80%, .18);
    --glass: linear-gradient(180deg, hsla(195, 100%, 80%, .06), hsla(195, 100%, 80%, .02));

    --cont: min(1340px, 100% - 56px);
    --gap: 22px;
    --pad: 26px;
    --r: 16px;
    --h: 88px;
    --space: 100px;

    --sans: ui-sans-serif, -apple-system, Inter, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans";
    --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Fira Code", monospace;

    --xxl: clamp(48px, 7.5vw, 112px);
    --xl: clamp(30px, 3.6vw, 52px);
    --lg: clamp(20px, 2.2vw, 24px);
    --sm: 13px;
}

/* Base */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: #000;
    color: var(--ink);
    font: 16px/1.65 var(--sans);
    overflow-x: hidden;
}
[id] { scroll-margin-top: calc(var(--h) + 18px); }
a { color: var(--ink2); }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--ink2); outline-offset: 2px; }

/* Monolithic background */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -3;
    pointer-events: none;
    background:
            radial-gradient(1400px 900px at 10% 18%, rgba(0, 255, 208, .12), transparent 60%),
            radial-gradient(1200px 800px at 86% 12%, rgba(53, 225, 255, .18), transparent 64%),
            repeating-linear-gradient(0deg, rgba(255, 255, 255, .03) 0 1px, transparent 1px 3px),
            repeating-linear-gradient(90deg, rgba(255, 255, 255, .02) 0 1px, transparent 1px 3px),
            linear-gradient(180deg, #051017, #061019 50%, #050d14);
    filter: saturate(110%);
}
body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    pointer-events: none;
    opacity: .95;
    background: radial-gradient(1400px 900px at 50% 120%, rgba(0, 0, 0, .72), transparent 60%);
    mix-blend-mode: overlay;
}

/* Layout primitives */
.wrap { width: var(--cont); margin: 0 auto; min-width: 0; }
.space { padding-block: var(--space); }
.space-lg { padding-block: calc(var(--space) + 42px); }
.kicker {
    font: var(--sm)/1 var(--sans);
    letter-spacing: .32em;
    text-transform: uppercase;
    color: var(--muted);
}

/* Header */
header {
    position: sticky;
    top: 0;
    z-index: 60;
    background: rgba(7, 16, 21, .6);
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(160%);
    border-bottom: 1px solid var(--brd);
}
.nx-nav {
    min-height: var(--h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    padding: 10px 0;
}
.brand { display: flex; align-items: center; gap: 14px; }
.sig {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: conic-gradient(from 210deg, var(--aqua), var(--cyan), var(--aqua));
    box-shadow: 0 0 42px rgba(0, 255, 208, .25);
}
.brand strong { letter-spacing: .8px; }
.rail { display: flex; gap: 10px; flex-wrap: wrap; }
.rail a {
    display: inline-block;
    padding: 10px 14px;
    border-radius: 10px;
    border: 1px solid var(--brd);
    color: var(--ink);
    text-decoration: none;
    font-weight: 800;
}
.rail a:hover { background: rgba(255, 255, 255, .07); }

/* Scroll-spy (CSS :has + :in-view) */
body:has(#gate:in-view) .rail a[href="#gate"],
body:has(#ticket:in-view) .rail a[href="#ticket"],
body:has(#pgp:in-view) .rail a[href="#pgp"],
body:has(#adv:in-view) .rail a[href="#adv"],
body:has(#how:in-view) .rail a[href="#how"],
body:has(#prot:in-view) .rail a[href="#prot"],
body:has(#state:in-view) .rail a[href="#state"],
body:has(#faq:in-view) .rail a[href="#faq"] {
    background: linear-gradient(135deg, var(--aqua), var(--cyan));
    color: #031016;
    border-color: transparent;
}

/* HERO — single welcome */
.hero {
    min-height: 90svh;
    display: grid;
    align-items: center;
}
.split {
    display: grid;
    grid-template-columns: .3fr 4fr;
    gap: var(--gap);
}
@media (max-width: 1160px) {
    .split { grid-template-columns: 1fr; }
}
.mast {
    writing-mode: vertical-rl;
    text-orientation: upright;
    letter-spacing: .12em;
    display: grid;
    place-items: center;
    border-right: 1px solid var(--brd);
    padding-right: 12px;
    color: var(--ink2);
    opacity: .88;
}
.deck {
    border: 1px solid var(--brd);
    background: var(--glass);
    border-radius: 0;
    clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
    padding: var(--pad);
    box-shadow: 0 50px 100px rgba(0, 0, 0, .6);
}
h1.title { margin: 0 0 8px; font-size: var(--xxl); line-height: 1.02; }
.title .accent {
    background: linear-gradient(90deg, #fff, var(--ink2), var(--aqua));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 14px 70px rgba(0, 255, 208, .3);
}
.lead { font-size: var(--lg); max-width: 70ch; color: #e6faff; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 14px; }
.btn {
    display: inline-block;
    padding: 12px 16px;
    border-radius: 10px;
    border: 1px solid var(--brd);
    text-decoration: none;
    font-weight: 900;
    color: var(--ink);
}
.btn.primary {
    background: linear-gradient(135deg, var(--aqua), var(--cyan));
    border-color: transparent;
    color: #051015;
}

/* Tickets — onion links */
.tickets {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap);
}
@media (max-width: 1160px) {
    .tickets { grid-template-columns: 1fr; }
}
.ticket {
    position: relative;
    border: 1px solid var(--brd);
    background: var(--glass);
    padding: 18px;
    border-radius: 0;
    clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}
.ticket .top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}
.ticket .meta { color: var(--muted); }
.mono { font-family: var(--mono); }
.addr {
    font: 14px/1.5 var(--mono);
    width: 100%;
    background: #091826;
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: 10px;
    padding: 5px 10px;
    margin-top: 10px;
    color: #e6faff;
    white-space: pre-wrap;
    word-break: break-all;
}
.strip {
    height: 8px;
    border-radius: 6px;
    background: linear-gradient(90deg, var(--aqua), transparent 40%, var(--cyan));
    opacity: .6;
    margin: 10px 0;
}
.copy {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, .18);
    background: rgba(255, 255, 255, .06);
    font: 900 12px/1 var(--sans);
    letter-spacing: .08em;
    text-transform: uppercase;
}

/* PGP certificate (ribbon bottom-right) */
.certificate {
    display: grid;
    grid-template-columns: 1fr .9fr;
    gap: var(--gap);
}
@media (max-width: 1000px) {
    .certificate { grid-template-columns: 1fr; }
}
.sheet {
    border: 1px solid var(--brd);
    border-radius: var(--r);
    background: var(--glass);
    padding: var(--pad);
    position: relative;
    overflow: hidden;
}
.ribbon {
    position: absolute;
    bottom: 60px;
    right: -90px;
    transform: rotate(-35deg);
    background: linear-gradient(135deg, var(--aqua), var(--cyan));
    color: #0b1317;
    padding: 8px 80px;
    font-weight: 900;
    letter-spacing: .18em;
    pointer-events: none;
}
.blocks {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin: 12px 0;
}
.block {
    border: 1px solid var(--brd);
    background: #091826;
    border-radius: 10px;
    padding: 8px 10px;
    font: 600 14px var(--mono);
}
.key {
    max-height: 340px;
    overflow: auto;
    border: 1px solid var(--brd);
    background: #091826;
    border-radius: 12px;
    padding: 12px;
    color: #e6faff;
    font: 13px/1.4 var(--mono);
}

/* Advantages */
.grid4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--gap);
}
@media (max-width: 1160px) {
    .grid4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
    .grid4 { grid-template-columns: 1fr; }
}
.doctrine {
    border: 1px solid var(--brd);
    border-radius: var(--r);
    background: var(--glass);
    padding: var(--pad);
}
.doctrine h3 { margin: 0 0 6px; }

/* How-to timeline */
.timeline {
    border-left: 2px solid var(--brd);
    padding-left: 18px;
    display: grid;
    gap: 12px;
    counter-reset: step;
}
.tl {
    position: relative;
    border: 1px solid var(--brd);
    border-radius: 12px;
    background: var(--glass);
    padding: 14px;
}
.tl::before {
    content: counter(step);
    counter-increment: step;
    position: absolute;
    left: -21px;
    top: -8px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--aqua), var(--cyan));
    color: #031016;
    font: 900 12px var(--sans);
    box-shadow: 0 0 0 3px rgba(0, 255, 208, .28);
}

/* Protocols */
.protos {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--gap);
}
@media (max-width: 980px) {
    .protos { grid-template-columns: 1fr; }
}
.proto {
    border: 1px solid var(--brd);
    border-radius: var(--r);
    background: var(--glass);
    padding: var(--pad);
}
.num {
    display: inline-grid;
    place-items: center;
    width: 24px;
    height: 24px;
    border-radius: 6px;
    background: #0f2e3d;
    color: #b9f3ff;
    font: 900 12px var(--sans);
    margin-right: 10px;
}

/* Status: rail + meters */
.state-wrap {
    display: grid;
    grid-template-columns: .9fr 1.1fr;
    gap: var(--gap);
}
@media (max-width: 980px) {
    .state-wrap { grid-template-columns: 1fr; }
}
.railbox {
    border: 1px solid var(--brd);
    border-radius: var(--r);
    background: var(--glass);
    padding: var(--pad);
}
.chip {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    border: 1px solid var(--brd);
    border-radius: 12px;
    padding: 10px 12px;
    background: #0c1822;
    margin-top: 10px;
}
.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, .2);
    font: 900 12px/1 var(--sans);
}
.badge.ok {
    background: rgba(0, 255, 208, .12);
    color: #bafff1;
    border-color: rgba(0, 255, 208, .26);
}
.badge.slow {
    background: rgba(255, 211, 107, .12);
    color: #fff0cc;
    border-color: rgba(255, 211, 107, .26);
}
.meters {
    border: 1px solid var(--brd);
    border-radius: var(--r);
    background: var(--glass);
    padding: var(--pad);
    display: grid;
    gap: 16px;
}
.meter {
    background: #091826;
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: 12px;
    overflow: hidden;
}
.meter .row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    color: var(--muted);
}
.meter .bar { height: 16px; background: #06131b; }
.meter .bar span {
    display: block;
    height: 100%;
    width: var(--v, 50%);
    background: linear-gradient(90deg, var(--aqua), var(--cyan));
}

.bar{
    margin: 0 10px;
    border: 1px solid var(--brd);
    border-radius: 10px;
}

.bar span {
    border: 1px solid var(--brd);
    border-radius: 10px;
}
.meter .val { font-weight: 900; color: var(--ink); }

/* FAQ + Footer */
details {
    border: 1px solid var(--brd);
    border-radius: var(--r);
    background: var(--glass);
    padding: 14px 16px;
}
summary { cursor: pointer; font-weight: 800; }
details + details { margin-top: 12px; }

footer {
    border-top: 1px solid var(--brd);
    color: var(--muted);
    padding: 56px 0 92px;
    background: linear-gradient(180deg, hsla(195, 100%, 80%, .03), hsla(195, 100%, 80%, .015));
}
.footer {
    display: grid;
    grid-template-columns: 1.2fr .8fr .8fr;
    gap: var(--gap);
}
@media (max-width: 1000px) {
    .footer { grid-template-columns: 1fr; }
}
small.mono { font: 12px/1.6 var(--mono); display: block; margin-top: 10px; }