/* MoBiGo: green phosphor, scanlines, pixels. */
:root {
  --bg: #030803;
  --panel: #061206;
  --line: #134d22;
  --dim: #1f8a3e;
  --mid: #2fd35a;
  --fg: #39ff6a;
  --hot: #b6ffcb;
  --glow: 0 0 2px rgba(57, 255, 106, .9), 0 0 10px rgba(57, 255, 106, .45);
  --glow-soft: 0 0 6px rgba(57, 255, 106, .35);
  --pixel: "Press Start 2P", ui-monospace, monospace;
  --term: "VT323", ui-monospace, Menlo, monospace;
  --gutter: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 22px/1.35 var(--term);
  text-shadow: var(--glow-soft);
  -webkit-font-smoothing: none;
  overflow-x: hidden;
}
a { color: var(--hot); text-decoration: none; border-bottom: 2px dotted var(--dim); }
a:hover, a:focus-visible { color: var(--bg); background: var(--fg); border-bottom-color: var(--fg); text-shadow: none; }
:focus-visible { outline: 3px solid var(--hot); outline-offset: 3px; }
::selection { background: var(--fg); color: var(--bg); text-shadow: none; }
img { max-width: 100%; display: block; }
code, pre, kbd { font-family: var(--term); }

/* ---------- CRT overlay ---------- */
.crt::before, .crt::after { content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 50; }
.crt::before {
  background: repeating-linear-gradient(to bottom, rgba(0,0,0,0) 0, rgba(0,0,0,0) 2px, rgba(0,0,0,.28) 3px, rgba(0,0,0,0) 4px);
}
.crt::after {
  background: radial-gradient(ellipse at center, rgba(0,0,0,0) 55%, rgba(0,0,0,.55) 100%);
  animation: flicker 6s infinite steps(1);
}
@keyframes flicker { 0%, 100% { opacity: 1; } 47% { opacity: .92; } 48% { opacity: 1; } 83% { opacity: .95; } }
body:not(.crt) { text-shadow: none; }

/* ---------- Layout ---------- */
.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 var(--gutter); }
section { padding: 72px 0; border-top: 2px dashed var(--line); }
h1, h2, h3 { font-family: var(--pixel); font-weight: 400; line-height: 1.5; margin: 0 0 20px; text-shadow: var(--glow); }
h2 { font-size: 20px; }
h2::before { content: "> "; color: var(--dim); }
h3 { font-size: 13px; color: var(--hot); }
p { margin: 0 0 16px; }
.muted { color: var(--mid); }
.dim { color: var(--dim); }

/* ---------- Top bar ---------- */
.topbar { position: sticky; top: 0; z-index: 40; background: rgba(3, 8, 3, .92); border-bottom: 2px solid var(--line); backdrop-filter: blur(2px); }
.topbar .wrap { display: flex; align-items: center; gap: 18px; min-height: 56px; }
.brand { font-family: var(--pixel); font-size: 13px; color: var(--fg); border: 0; display: flex; align-items: center; gap: 10px; }
.brand .mascot { width: 18px; height: auto; }
.brand:hover { background: none; color: var(--hot); }
.nav { display: flex; gap: 18px; margin-left: auto; flex-wrap: wrap; }
.nav a { border: 0; color: var(--mid); }
.nav a:hover { color: var(--bg); }
.crt-toggle {
  font: 16px var(--term); color: var(--fg); background: transparent; border: 2px solid var(--dim);
  padding: 2px 8px; cursor: pointer; text-shadow: inherit;
}
.crt-toggle:hover { background: var(--fg); color: var(--bg); }
@media (max-width: 640px) {
  .nav { display: none; }
  .crt-toggle { margin-left: auto; }
}

/* ---------- Hero ---------- */
.hero { padding: 64px 0 56px; border-top: 0; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 40px; align-items: center; }
.logo { width: 100%; max-width: 620px; height: auto; color: var(--fg); filter: drop-shadow(0 0 6px rgba(57,255,106,.6)); }
.tagline { font-family: var(--pixel); font-size: 14px; line-height: 1.8; margin: 28px 0 18px; color: var(--hot); }
.lede { font-size: 26px; max-width: 34ch; }
.cursor { display: inline-block; width: .6em; height: 1em; background: var(--fg); vertical-align: -0.12em; margin-left: 4px; animation: blink 1s steps(1) infinite; box-shadow: var(--glow); }
@keyframes blink { 50% { opacity: 0; } }
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.btn {
  font-family: var(--pixel); font-size: 12px; padding: 14px 18px; border: 3px solid var(--fg);
  color: var(--fg); background: transparent; box-shadow: 4px 4px 0 var(--dim); display: inline-block;
}
.btn:hover, .btn:focus-visible { background: var(--fg); color: var(--bg); border-color: var(--fg); transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--dim); }
.btn.primary { background: var(--fg); color: var(--bg); text-shadow: none; }
.btn.primary:hover { background: var(--hot); }
.mascot-wrap { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.mascot-wrap .mascot { width: 100%; max-width: 200px; height: auto; filter: drop-shadow(0 0 8px rgba(57,255,106,.5)); }
.mascot .m-body, .mascot .m-eyes, .mascot .m-smile { fill: var(--fg); }
.mascot .m-screen { fill: #0b2a12; }
.mascot .m-eyes { animation: eyes 5s infinite; transform-origin: 7px 5.9px; }
@keyframes eyes { 0%, 92%, 100% { transform: scaleY(1); } 94%, 96% { transform: scaleY(.15); } }
.badge { font-family: var(--pixel); font-size: 10px; border: 2px solid var(--dim); padding: 6px 8px; color: var(--mid); }
@media (max-width: 760px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); }
  .mascot-wrap { order: -1; flex-direction: row; justify-content: flex-start; }
  .mascot-wrap .mascot { max-width: 72px; }
  .lede { font-size: 22px; }
  .tagline { font-size: 11px; }
}

/* ---------- Panels, terminal, code ---------- */
.panel { background: var(--panel); border: 2px solid var(--line); box-shadow: 6px 6px 0 #020502; }
.panel-head { display: flex; align-items: center; gap: 10px; padding: 6px 12px; border-bottom: 2px solid var(--line); color: var(--dim); font-size: 18px; }
.panel-head .dots { letter-spacing: 3px; }
.panel-head .title { margin-left: auto; }
.terminal pre, .code pre {
  margin: 0; padding: 16px; font-size: 20px; line-height: 1.35; overflow-x: auto; white-space: pre;
}
.terminal { min-height: 380px; }
.t-prompt { color: var(--dim); }
.t-cmd { color: var(--hot); }
.t-ok { color: var(--fg); }
.t-out { color: var(--mid); }
.copy {
  margin-left: auto; font: 16px var(--term); color: var(--mid); background: transparent;
  border: 2px solid var(--line); padding: 0 8px; cursor: pointer; text-shadow: inherit;
}
.copy:hover { color: var(--bg); background: var(--fg); border-color: var(--fg); }
.k { color: var(--hot); }
.s { color: #9dffb9; }
.c { color: var(--dim); }
.f { color: var(--fg); text-decoration: underline dotted var(--dim); }

/* ---------- Diagram ---------- */
.stack { padding: 16px; display: grid; }
.layer { border: 2px solid var(--fg); padding: 10px 12px; display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 12px; align-items: baseline; }
.layer b { font-family: var(--pixel); font-weight: 400; font-size: 10px; color: var(--hot); }
.layer span { color: var(--mid); }
.layer.core { background: var(--fg); color: var(--bg); text-shadow: none; box-shadow: 0 0 14px rgba(57,255,106,.45); }
.layer.core b, .layer.core span { color: var(--bg); }
.link { text-align: center; color: var(--dim); font-size: 18px; padding: 2px 0; }
.link::before { content: "| "; }
.link::after { content: " |"; }
.diagram { font-size: clamp(13px, 3.4vw, 20px); line-height: 1.25; }
.split { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 32px; align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: minmax(0, 1fr); } }
.steps { list-style: none; padding: 0; margin: 0; counter-reset: s; }
.steps li { counter-increment: s; padding-left: 52px; position: relative; margin-bottom: 18px; }
.steps li::before {
  content: counter(s, decimal-leading-zero); position: absolute; left: 0; top: 0;
  font-family: var(--pixel); font-size: 12px; color: var(--bg); background: var(--fg); padding: 5px 6px; text-shadow: none;
}

/* ---------- Features ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.card { padding: 18px; border: 2px solid var(--line); background: var(--panel); }
.card h3::before { content: "◆ "; color: var(--fg); }
.card p { color: var(--mid); margin: 0; }

/* ---------- Phones ---------- */
.phones { display: flex; gap: 28px; flex-wrap: wrap; align-items: flex-start; }
.phone { width: 230px; max-width: 46%; border: 3px solid var(--fg); padding: 10px 8px 22px; background: #020502; box-shadow: 0 0 18px rgba(57,255,106,.25), 6px 6px 0 var(--line); position: relative; }
.phone::after { content: ""; position: absolute; left: 50%; bottom: 7px; width: 26px; height: 6px; margin-left: -13px; background: var(--dim); }
.phone img { filter: grayscale(1) sepia(1) hue-rotate(68deg) saturate(3.2) brightness(.82) contrast(1.15); image-rendering: auto; }
.crt .phone img { filter: grayscale(1) sepia(1) hue-rotate(68deg) saturate(3.2) brightness(.82) contrast(1.15) drop-shadow(0 0 2px rgba(57,255,106,.5)); }
.phone figcaption { font-size: 18px; color: var(--mid); margin-top: 8px; text-align: center; }
.phone-copy { flex: 1 1 280px; }

/* ---------- Roadmap ---------- */
.roadmap { list-style: none; padding: 0; margin: 0; }
.roadmap li { padding: 6px 0; border-bottom: 1px dashed var(--line); }
.roadmap .done::before { content: "[X] "; color: var(--fg); }
.roadmap .next::before { content: "[>] "; color: var(--hot); }
.roadmap .todo::before { content: "[ ] "; color: var(--dim); }
.roadmap .todo { color: var(--mid); }

.notice { border: 2px dashed var(--hot); padding: 14px 16px; color: var(--hot); margin: 0 0 24px; }
.notice strong { font-family: var(--pixel); font-size: 11px; display: block; margin-bottom: 6px; }

/* ---------- Footer ---------- */
footer { border-top: 2px solid var(--line); padding: 32px 0 48px; color: var(--dim); font-size: 18px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; }

/* ---------- Boot screen ---------- */
.boot {
  position: fixed; inset: 0; z-index: 60; background: var(--bg); padding: 32px var(--gutter);
  font-size: 22px; color: var(--fg); cursor: pointer; transition: opacity .35s steps(4);
}
.boot pre { margin: 0; font-family: var(--term); white-space: pre-wrap; }
.boot.done { opacity: 0; pointer-events: none; }
.boot .skip { position: absolute; right: var(--gutter); bottom: 24px; color: var(--dim); font-size: 18px; }

/* ---------- Docs ---------- */
.docs { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 40px; padding: 40px 0 72px; }
.docs nav { position: sticky; top: 80px; align-self: start; display: grid; gap: 6px; font-size: 20px; }
.docs nav a { border: 0; color: var(--mid); }
.docs nav a:hover { color: var(--bg); }
.docs article section { padding: 32px 0; }
.docs article section:first-child { border-top: 0; padding-top: 0; }
.docs table { width: 100%; border-collapse: collapse; margin: 0 0 16px; font-size: 20px; }
.docs th, .docs td { text-align: left; padding: 6px 10px; border: 1px solid var(--line); vertical-align: top; }
.docs th { color: var(--hot); background: var(--panel); font-weight: 400; }
.docs code { color: var(--hot); }
.docs .code { margin: 0 0 18px; }
.table-scroll { overflow-x: auto; }
@media (max-width: 760px) {
  .docs { grid-template-columns: minmax(0, 1fr); }
  .docs nav { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (prefers-reduced-motion: reduce) {
  .crt::after, .cursor, .mascot .m-eyes { animation: none; }
  html { scroll-behavior: auto; }
}