/* Shared styles for NullSocket's static pages (/about/, /guide/, 404). The game itself uses style.css. */
:root {
  --bg: #04060b; --bg2: #070b14; --panel: #0a101c; --line: rgba(57,255,136,.18);
  --fg: #dff7ea; --dim: #9db3c2; --mute: #6b8191;
  --acc: #39ff88; --acc2: #29e6ff; --mag: #ff2bd6; --warn: #ffb800; --ink: #02140a;
  --disp: "Orbitron", system-ui, sans-serif; --mono: "Share Tech Mono", ui-monospace, Menlo, monospace;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background-image:
    radial-gradient(900px 480px at 15% -10%, rgba(57,255,136,.10), transparent 60%),
    radial-gradient(700px 420px at 100% 0%, rgba(41,230,255,.07), transparent 60%),
    linear-gradient(rgba(41,230,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(41,230,255,.035) 1px, transparent 1px);
  background-size: auto, auto, 40px 40px, 40px 40px;
}
a { color: var(--acc2); }
a:hover { color: var(--acc); }
:focus-visible { outline: 2px solid var(--acc); outline-offset: 3px; border-radius: 4px; }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }

/* header */
.top { position: sticky; top: 0; z-index: 5; background: rgba(4,6,11,.86); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 18px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--fg); font: 900 1.05rem/1 var(--disp); letter-spacing: .06em; text-transform: uppercase; }
.brand b { color: var(--acc); font-weight: 900; }
.brand .mark { width: 32px; height: 32px; border-radius: 8px; background: #0b0f0c; border: 1px solid var(--acc); display: grid; place-items: center; color: #7cffa0; font: 700 .95rem/1 var(--mono); }
.top nav { margin-left: auto; display: flex; align-items: center; gap: 18px; font-size: .92rem; }
.top nav a { color: var(--dim); text-decoration: none; }
.top nav a:hover, .top nav a[aria-current="page"] { color: var(--fg); }
.top nav a, .btn { white-space: nowrap; }
@media (max-width: 560px) { .top nav a.hide-sm { display: none; } .top nav { gap: 14px; } }
@media (max-width: 420px) { .brand { font-size: .92rem; } .brand .mark { width: 28px; height: 28px; } .top nav a:not(.btn):not([aria-current]) { display: none; } }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 10px; font: 700 .95rem/1 var(--disp); letter-spacing: .06em; text-transform: uppercase; text-decoration: none; border: 1px solid var(--acc); }
.btn.primary { background: var(--acc); color: var(--ink); box-shadow: 0 0 24px rgba(57,255,136,.35); }
.btn.primary:hover { color: var(--ink); background: #5dffa0; }
.btn.ghost { color: var(--acc); background: transparent; }
.btn.ghost:hover { background: rgba(57,255,136,.08); color: var(--acc); }
.btn.sm { padding: 9px 14px; font-size: .78rem; }

/* hero */
.hero { padding: 64px 0 36px; display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; }
@media (max-width: 820px) { .hero { grid-template-columns: 1fr; padding-top: 40px; } }
.kicker { font: 1rem/1.3 var(--mono); color: var(--acc2); letter-spacing: .08em; margin: 0 0 14px; }
h1 { font: 900 clamp(2rem, 6vw, 3.3rem)/1.08 var(--disp); letter-spacing: .02em; margin: 0 0 18px; }
h1 em { font-style: normal; color: var(--acc); text-shadow: 0 0 22px rgba(57,255,136,.55); }
.lead { font-size: 1.15rem; color: var(--dim); margin: 0 0 26px; max-width: 34em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0 0; padding: 0; list-style: none; }
.chips li { font: .85rem/1 var(--mono); color: var(--fg); border: 1px solid var(--line); background: var(--bg2); padding: 7px 10px; border-radius: 999px; }

/* terminal */
.term { background: var(--panel); border: 1px solid rgba(57,255,136,.45); border-radius: 14px; box-shadow: 0 0 40px rgba(57,255,136,.08); overflow: hidden; }
.term .bar { display: flex; gap: 7px; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.term .bar i { width: 11px; height: 11px; border-radius: 50%; background: #ff3b5c; }
.term .bar i:nth-child(2) { background: var(--warn); } .term .bar i:nth-child(3) { background: var(--acc); }
.term pre { margin: 0; padding: 16px 18px 20px; font: .95rem/1.75 var(--mono); color: var(--fg); white-space: pre-wrap; }
.term .c { color: var(--acc2); } .term .ok { color: var(--acc); } .term .m { color: var(--mag); } .term .d { color: var(--mute); }
.cursor { display: inline-block; width: .6em; height: 1.05em; background: var(--acc); vertical-align: -.15em; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .cursor { animation: none; } }

/* sections */
section { padding: 40px 0; }
h2 { font: 800 clamp(1.35rem, 3.6vw, 1.85rem)/1.2 var(--disp); letter-spacing: .03em; margin: 0 0 14px; }
h2 .n { color: var(--acc); font-family: var(--mono); margin-right: 10px; }
h3 { font: 700 1.05rem/1.3 var(--disp); letter-spacing: .03em; margin: 0 0 8px; color: var(--fg); }
p { margin: 0 0 14px; }
.sub { color: var(--dim); max-width: 44em; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 14px; margin-top: 20px; }
.card { background: var(--bg2); border: 1px solid var(--line); border-radius: 14px; padding: 20px; }
.card p { color: var(--dim); font-size: .97rem; margin: 0; }
.card .ico { font: 1.2rem/1 var(--mono); color: var(--acc); display: block; margin-bottom: 10px; }
code, .ip { font-family: var(--mono); color: var(--acc2); background: rgba(41,230,255,.08); padding: 1px 6px; border-radius: 5px; font-size: .95em; }

/* loop */
.loop { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 20px 0 6px; padding: 0; list-style: none; font: .95rem/1 var(--mono); }
.loop li { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.loop li + li::before { content: "→"; color: var(--acc); margin: 0 10px 0 -2px; }

/* guide */
.toc { background: var(--bg2); border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; margin: 8px 0 10px; }
.toc ol { margin: 6px 0 0; padding-left: 1.3em; columns: 2; column-gap: 32px; }
@media (max-width: 640px) { .toc ol { columns: 1; } }
.toc a { color: var(--fg); text-decoration: none; } .toc a:hover { color: var(--acc); }
.step { border-left: 2px solid var(--line); padding: 4px 0 4px 22px; margin: 0 0 6px; scroll-margin-top: 80px; }
.step ul { margin: 0 0 14px; padding-left: 1.2em; color: var(--dim); }
.step li { margin: 4px 0; }
.tip { border: 1px solid rgba(41,230,255,.35); background: rgba(41,230,255,.06); border-radius: 12px; padding: 12px 16px; color: var(--fg); font-size: .96rem; margin: 6px 0 16px; }
.tip b { color: var(--acc2); font-family: var(--mono); font-weight: 400; }

/* faq */
details { background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; margin: 10px 0; }
summary { cursor: pointer; padding: 16px 18px; font-weight: 600; list-style: none; display: flex; gap: 12px; align-items: baseline; }
summary::-webkit-details-marker { display: none; }
summary::before { content: "+"; color: var(--acc); font-family: var(--mono); }
details[open] summary::before { content: "−"; }
details .a { padding: 0 18px 16px 42px; color: var(--dim); }

/* banner + footer */
.banner { text-align: center; background: linear-gradient(135deg, rgba(57,255,136,.10), rgba(41,230,255,.06)); border: 1px solid rgba(57,255,136,.35); border-radius: 18px; padding: 34px 20px; margin: 20px 0 50px; }
.banner p { color: var(--dim); }
footer { border-top: 1px solid var(--line); padding: 26px 0 40px; color: var(--mute); font-size: .88rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 10px 22px; align-items: center; }
footer nav { display: flex; gap: 18px; margin-left: auto; }
footer a { color: var(--dim); text-decoration: none; } footer a:hover { color: var(--acc); }

/* 404 */
.nf { min-height: 70vh; display: grid; place-items: center; text-align: center; padding: 40px 0; }
.nf .code { font: 900 clamp(4rem, 18vw, 8rem)/1 var(--disp); color: var(--acc); text-shadow: 0 0 30px rgba(57,255,136,.5); margin: 0; }