/* ════════════════════════════════════════════════════════════════════
   Mercury — terminal-contrast theme
   Carbon black ↔ pure white, JetBrains Mono, phosphor-green accents.
   ════════════════════════════════════════════════════════════════════ */

:root {
  --black: #0a0a0a;
  --black-soft: #131313;
  --white: #ffffff;
  --paper: #ffffff;
  --grn: #2bff6f;        /* green on black */
  --grn-ink: #0a8f47;    /* green on white */
  --amber: #ffd24a;      /* warn on black */
  --amber-ink: #a36e00;  /* warn on white */
  --gray: #9a9a9a;
  --gray-dim: #6f6f6f;
  --gray-ink: #555555;
  --line-dark: #222222;
  --max: 980px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--black);
  color: #f4f4f4;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
img { max-width: 100%; }
::selection { background: var(--grn); color: var(--black); }
::-webkit-scrollbar { width: 11px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: #333; border: 2px solid var(--black); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--grn); }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 26px; }
.grn { color: var(--grn); }
.dim { color: var(--gray-dim); }

/* ── reveal-on-scroll ─────────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; } .reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; } .reveal.d4 { transition-delay: .32s; }
.reveal.d5 { transition-delay: .40s; }

/* ── fixed nav ────────────────────────────────────────────────────── */
nav.top {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(10,10,10,.88); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-dark);
}
nav.top .bar { max-width: var(--max); margin: 0 auto; padding: 12px 26px; display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
nav.top .brand { font-weight: 800; font-size: .95rem; color: #fff; display: flex; align-items: center; gap: 9px; }
nav.top .brand .logo { width: 26px; height: 26px; border-radius: 7px; display: block; }
nav.top .brand .v { color: var(--gray-dim); font-weight: 400; }
nav.top .links { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
nav.top .links a { font-size: .76rem; color: var(--gray); position: relative; }
nav.top .links a::after { content: ""; position: absolute; left: 0; bottom: -3px; height: 1px; width: 0; background: var(--grn); transition: width .2s; }
nav.top .links a:hover { color: #fff; }
nav.top .links a:hover::after { width: 100%; }
nav.top .links a.here { color: #fff; }
nav.top .links a.here::after { width: 100%; }
nav.top .navbtn { border: 1px solid var(--grn); color: var(--grn) !important; padding: 7px 15px; border-radius: 6px; transition: background .15s, color .15s; }
nav.top .navbtn:hover { background: var(--grn); color: var(--black) !important; }
nav.top .navbtn:hover::after, nav.top .navbtn::after { width: 0 !important; }

/* ── scanlines on black sections ──────────────────────────────────── */
.scanlines { position: relative; }
.scanlines::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 2;
  background: repeating-linear-gradient(0deg, rgba(255,255,255,.028) 0 1px, transparent 1px 3px);
}
.scanlines > .wrap { position: relative; z-index: 3; }

/* ── hero (index) ─────────────────────────────────────────────────── */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; overflow: hidden; padding: 120px 0 80px; }
.hero .ghost {
  position: absolute; right: -6%; top: 50%; width: clamp(280px, 44vw, 600px);
  opacity: .05; filter: grayscale(1) brightness(2.4); user-select: none; pointer-events: none;
  animation: ghostfloat 9s ease-in-out infinite;
}
@keyframes ghostfloat { 0%,100% { transform: translateY(-52%); } 50% { transform: translateY(-46%); } }
.hero .inner { position: relative; z-index: 3; width: 100%; }
.hero .promptline { font-size: .85rem; color: #8a8a8a; min-height: 1.7em; }
.hero .promptline .p { color: var(--grn); }
.hero .bootout { font-size: .8rem; color: var(--gray-dim); margin: 10px 0 26px; min-height: 5.1em; }
.hero .bootout div { opacity: 0; transform: translateX(-8px); transition: opacity .3s, transform .3s; }
.hero .bootout div.on { opacity: 1; transform: none; }
.hero .bootout .ok { color: var(--grn); font-weight: 700; }
.hero h1 {
  font-size: clamp(2.4rem, 7.4vw, 5rem); font-weight: 800; line-height: 1.04;
  letter-spacing: -0.03em; color: #fff; text-transform: uppercase;
}
.hero h1 .invert { background: #fff; color: var(--black); padding: 0 14px; display: inline-block; }
.typecursor { display: inline-block; width: .52em; height: .95em; background: var(--grn); vertical-align: baseline; margin-left: 6px; animation: blink 1.05s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.hero .lede { color: var(--gray); max-width: 60ch; margin: 28px 0 38px; font-size: .95rem; }
.hero .lede b { color: #f4f4f4; font-weight: 500; }
.hero .sha { margin-top: 20px; font-size: .74rem; color: var(--gray-dim); }
.hero .sha a { color: var(--gray); text-decoration: underline; text-underline-offset: 3px; }
.hero .sha a:hover { color: var(--grn); }
.hero .scrolldown { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); color: var(--gray-dim); font-size: .72rem; letter-spacing: .2em; z-index: 3; animation: bob 1.6s ease-in-out infinite; }
@keyframes bob { 0%,100% { transform: translate(-50%, 0); } 50% { transform: translate(-50%, 8px); } }

/* ── buttons ──────────────────────────────────────────────────────── */
.cta { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 16px 30px; border-radius: 8px;
  font-weight: 700; font-size: .92rem; border: 2px solid #fff;
  transition: transform .12s ease, background .15s, color .15s, box-shadow .15s;
}
.btn:hover { transform: translate(-2px, -2px); }
.btn:active { transform: translate(0, 0); }
.btn.pri { background: #fff; color: var(--black); }
.btn.pri:hover { box-shadow: 5px 5px 0 var(--grn); }
.btn.sec { background: transparent; color: #fff; }
.btn.sec:hover { background: #fff; color: var(--black); box-shadow: 5px 5px 0 var(--grn); }
/* inverse buttons for white sections */
.white .btn { border-color: var(--black); }
.white .btn.pri { background: var(--black); color: #fff; }
.white .btn.pri:hover { box-shadow: 5px 5px 0 var(--grn-ink); }
.white .btn.sec { color: var(--black); }
.white .btn.sec:hover { background: var(--black); color: #fff; box-shadow: 5px 5px 0 var(--grn-ink); }

/* ── marquee ──────────────────────────────────────────────────────── */
.marquee { background: #fff; color: var(--black); border-top: 3px solid var(--black); border-bottom: 3px solid var(--black); overflow: hidden; white-space: nowrap; padding: 13px 0; }
.marquee .inner { display: inline-block; animation: scroll 30s linear infinite; font-weight: 800; font-size: .85rem; letter-spacing: .12em; }
.marquee .inner .grn { color: var(--grn-ink); }
.marquee:hover .inner { animation-play-state: paused; }
@keyframes scroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ── sections ─────────────────────────────────────────────────────── */
section { padding: 110px 0; position: relative; }
section.white { background: #fff; color: var(--black); }
section.black { background: var(--black); color: #f4f4f4; }
section.tight { padding: 80px 0; }
h2.cmd { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
h2.cmd::before { content: "$ "; color: var(--gray-dim); font-weight: 400; }
section.white h2.cmd .grn, .white .grn-ink { color: var(--grn-ink); }
.secout { font-size: .88rem; margin-bottom: 44px; max-width: 64ch; }
section.white .secout { color: var(--gray-ink); }
section.black .secout { color: var(--gray); }

/* page header for subpages (security/faq/privacy) */
.pagehead { padding: 170px 0 80px; background: var(--black); overflow: hidden; }
.pagehead h1 { font-size: clamp(1.9rem, 5.4vw, 3.4rem); font-weight: 800; line-height: 1.1; letter-spacing: -0.025em; color: #fff; text-transform: uppercase; max-width: 24ch; }
.pagehead h1 .invert { background: #fff; color: var(--black); padding: 0 12px; display: inline-block; }
.pagehead .promptline { font-size: .85rem; color: #8a8a8a; margin-bottom: 18px; }
.pagehead .promptline .p { color: var(--grn); }
.pagehead .lede { color: var(--gray); max-width: 62ch; margin-top: 24px; font-size: .92rem; }

/* ── statement + why grid (white) ─────────────────────────────────── */
.statement { font-size: clamp(1.5rem, 4.4vw, 2.7rem); font-weight: 800; line-height: 1.25; text-transform: uppercase; letter-spacing: -0.02em; margin: 0 0 60px; max-width: 26ch; }
.statement .invert { background: var(--black); color: #fff; padding: 2px 14px; display: inline-block; }
.whygrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 0; border: 3px solid var(--black); }
.why { padding: 30px 28px; border: 1.5px solid var(--black); background: #fff; transition: background .18s, color .18s; cursor: default; }
.why .tag { font-size: .7rem; font-weight: 800; letter-spacing: .14em; color: var(--grn-ink); display: block; margin-bottom: 12px; }
.why h3 { font-size: 1rem; font-weight: 800; text-transform: uppercase; margin-bottom: 8px; }
.why p { font-size: .85rem; color: var(--gray-ink); transition: color .18s; }
.why a { text-decoration: underline; text-underline-offset: 3px; }
.why:hover { background: var(--black); color: #fff; }
.why:hover p { color: #b9b9b9; }
.why:hover .tag { color: var(--grn); }

/* ── artifacts + verify (black) ───────────────────────────────────── */
.artifacts { border: 2px solid #fff; }
.arow { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; padding: 24px 26px; border-bottom: 2px solid #fff; transition: background .18s; }
.arow:last-child { border-bottom: none; }
.arow:hover { background: var(--black-soft); }
.ainfo { display: flex; flex-direction: column; gap: 4px; }
.fname { font-weight: 800; font-size: .98rem; color: #fff; }
.fmeta { font-size: .72rem; color: #8a8a8a; }
.fmeta a { color: #b9b9b9; text-decoration: underline; text-underline-offset: 3px; }
.fmeta a:hover { color: var(--grn); }
.get { border: 2px solid #fff; color: #fff; font-weight: 800; font-size: .85rem; padding: 12px 26px; border-radius: 8px; transition: all .15s; white-space: nowrap; }
.get:hover { background: #fff; color: var(--black); box-shadow: 5px 5px 0 var(--grn); transform: translate(-2px,-2px); }
.get.primary { background: #fff; color: var(--black); }
.get.primary:hover { background: var(--grn); border-color: var(--grn); box-shadow: 5px 5px 0 #fff; }
.verify { border: 1px dashed #3a3a3a; border-radius: 10px; margin-top: 40px; padding: 22px 24px; background: #0d0d0d; }
.vtitle { font-size: .72rem; letter-spacing: .14em; color: var(--gray-dim); text-transform: uppercase; margin-bottom: 14px; display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.copybtn { background: transparent; border: 1px solid #3a3a3a; color: var(--gray); border-radius: 6px; padding: 5px 12px; font-size: .7rem; transition: all .15s; }
.copybtn:hover { border-color: var(--grn); color: var(--grn); }
.copybtn.copied { background: var(--grn); border-color: var(--grn); color: var(--black); font-weight: 700; }
.verify pre { font-family: inherit; font-size: .82rem; line-height: 2; color: #c9c9c9; white-space: pre-wrap; word-break: break-word; }
.vcur { width: .5em; height: 1em; }
.okflash { color: var(--grn); font-weight: 800; }
#verify-result.shown { animation: okpulse .5s ease; }
@keyframes okpulse { 0% { text-shadow: 0 0 0 rgba(43,255,111,0); } 40% { text-shadow: 0 0 18px rgba(43,255,111,.9); } 100% { text-shadow: 0 0 0 rgba(43,255,111,0); } }

/* ── status log (white) ───────────────────────────────────────────── */
.statuslog { border: 3px solid var(--black); padding: 10px 26px; background: #fff; }
.sline { display: flex; gap: 18px; align-items: baseline; padding: 16px 0; border-bottom: 1.5px dashed #c9c9c9; }
.sline:last-child { border-bottom: none; }
.stag { flex-shrink: 0; width: 76px; font-weight: 800; font-size: .8rem; }
.stag.ok { color: var(--grn-ink); }
.stag.warn { color: var(--amber-ink); }
.sline p { font-size: .88rem; color: var(--gray-ink); }
.sline b { color: var(--black); font-weight: 700; }

/* ── steps + final cta (black) ────────────────────────────────────── */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 0; border: 2px solid #fff; }
.step { padding: 30px 28px; border: 1px solid #fff; transition: background .18s; }
.step:hover { background: var(--black-soft); }
.snum { color: var(--grn); font-weight: 800; font-size: .8rem; display: block; margin-bottom: 12px; }
.step h3 { font-size: 1rem; font-weight: 800; text-transform: uppercase; margin-bottom: 8px; color: #fff; }
.step p { font-size: .85rem; color: var(--gray); }
.step a { text-decoration: underline; text-underline-offset: 3px; }
.finalcta { text-align: center; margin-top: 90px; }
.bigline { font-size: clamp(1.6rem, 4.4vw, 2.6rem); font-weight: 800; text-transform: uppercase; letter-spacing: -0.02em; color: #fff; margin-bottom: 30px; }

/* ── prose blocks (security page) ─────────────────────────────────── */
.prose { max-width: 70ch; }
.prose p { font-size: .9rem; margin-bottom: 20px; }
section.black .prose p { color: var(--gray); }
section.black .prose b { color: #f4f4f4; font-weight: 700; }
section.white .prose p { color: var(--gray-ink); }
section.white .prose b { color: var(--black); font-weight: 700; }
.prose a { text-decoration: underline; text-underline-offset: 3px; }
section.black .prose a:hover { color: var(--grn); }
section.white .prose a:hover { color: var(--grn-ink); }

/* flow diagram (security page) */
.flow { display: flex; align-items: stretch; gap: 0; flex-wrap: wrap; margin: 30px 0 10px; }
.fnode { flex: 1; min-width: 210px; border: 2px solid var(--black); padding: 20px; margin: 8px 0; background: #fff; }
.fnode .nl { font-size: .66rem; letter-spacing: .16em; text-transform: uppercase; color: var(--grn-ink); font-weight: 800; display: block; margin-bottom: 8px; }
.fnode h3 { font-size: .95rem; font-weight: 800; text-transform: uppercase; margin-bottom: 6px; }
.fnode p { font-size: .78rem; color: var(--gray-ink); }
.fnode.dashed { border-style: dashed; background: transparent; }
.farrow { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 0 12px; min-width: 80px; }
.farrow .ln { color: var(--black); font-weight: 800; white-space: nowrap; }
.farrow .al { font-size: .6rem; color: var(--gray-ink); letter-spacing: .1em; text-transform: uppercase; margin-top: 4px; text-align: center; }
@media (max-width: 860px) { .flow { flex-direction: column; } .farrow { transform: rotate(90deg); padding: 10px 0; } }

/* spec table (security page, black) */
.spec { width: 100%; border-collapse: collapse; font-size: .85rem; }
.spec td { border: 1px solid #333; padding: 14px 16px; vertical-align: top; }
.spec td:first-child { font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--grn); width: 220px; white-space: nowrap; background: #0d0d0d; font-weight: 700; }
.spec td:last-child { color: #b9b9b9; }
.spec td:last-child b { color: #fff; font-weight: 700; }
@media (max-width: 700px) { .spec td:first-child { width: 120px; white-space: normal; } }

/* ── faq accordion (white) ────────────────────────────────────────── */
.faq { border: 3px solid var(--black); }
.faq details { border-bottom: 1.5px solid var(--black); background: #fff; }
.faq details:last-child { border-bottom: none; }
.faq summary { list-style: none; display: flex; gap: 16px; align-items: baseline; padding: 22px 26px; font-weight: 800; font-size: .92rem; text-transform: uppercase; cursor: pointer; transition: background .15s, color .15s; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary .q { color: var(--grn-ink); flex-shrink: 0; font-size: .8rem; transition: transform .2s, color .15s; }
.faq details[open] summary { background: var(--black); color: #fff; }
.faq details[open] summary .q { color: var(--grn); transform: rotate(90deg); }
.faq summary:hover { background: var(--black); color: #fff; }
.faq summary:hover .q { color: var(--grn); }
.faq .a { padding: 22px 26px 26px 58px; font-size: .88rem; color: var(--gray-ink); }
.faq .a p { margin-bottom: 14px; }
.faq .a p:last-child { margin-bottom: 0; }
.faq .a b { color: var(--black); }
.faq .a a { text-decoration: underline; text-underline-offset: 3px; }
.faq .a a:hover { color: var(--grn-ink); }
.faq .a code { background: #f0f0ec; border: 1px solid #ddd; border-radius: 4px; padding: .08em .4em; font-size: .82em; }

/* ── legal prose (privacy page, white) ────────────────────────────── */
.legal { max-width: 74ch; }
.legal .updated { font-size: .74rem; color: var(--gray-ink); letter-spacing: .12em; text-transform: uppercase; margin-bottom: 28px; }
.legal h2 { font-size: 1rem; font-weight: 800; text-transform: uppercase; margin: 44px 0 12px; padding-top: 22px; border-top: 1.5px dashed #c9c9c9; }
.legal h2::before { content: "## "; color: var(--grn-ink); }
.legal p { font-size: .9rem; color: var(--gray-ink); margin-bottom: 16px; }
.legal b { color: var(--black); font-weight: 700; }
.legal a { text-decoration: underline; text-underline-offset: 3px; }
.legal a:hover { color: var(--grn-ink); }
.legal code { background: #f0f0ec; border: 1px solid #ddd; border-radius: 4px; padding: .08em .4em; font-size: .82em; }
.legal ul { margin: 0 0 16px 1.4em; }
.legal li { font-size: .9rem; color: var(--gray-ink); margin-bottom: 8px; }

/* ── footer (white) ───────────────────────────────────────────────── */
footer.site { background: #fff; color: var(--black); border-top: 3px solid var(--black); padding: 26px 0; }
footer.site .frow { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: .78rem; max-width: var(--max); margin: 0 auto; padding: 0 26px; }
footer.site b { font-weight: 800; }
footer.site a { text-decoration: underline; text-underline-offset: 3px; color: var(--gray-ink); }
footer.site a:hover { color: var(--grn-ink); }

/* ── reduced motion ───────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  .marquee .inner, .hero .ghost, .scrolldown, .typecursor { animation: none !important; }
  html { scroll-behavior: auto; }
}