:root {
  --bg: #060807;
  --bg-raise: #0c1410;
  --fg: #e7ffe8;
  --muted: #8eae96;
  --accent: #3dff6e;
  --accent-hot: #b6ffc9;
  --accent-soft: #3dff6e44;
  --card: #0a120ecc;
  --line: #3dff6e33;
  --warn: #ff6b7a;
  --font-text: "Courier New", Courier, monospace;
  --font-mono: "Courier New", Courier, monospace;
  --measure: 72rem;
  --read: 56rem;
  --gap: 1.15rem;
  --pad: 1.4rem;
  --glow: 0 0 18px var(--accent-soft);
  --curve: 1.6rem 2.4rem 1.3rem 2.1rem;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(42rem 26rem at 8% -8%, #1dff6a2e, transparent 62%),
    radial-gradient(36rem 24rem at 100% 0%, #00ffaa18, transparent 58%),
    radial-gradient(28rem 20rem at 70% 110%, #063318, transparent 55%),
    var(--bg);
  color: var(--fg);
  font: 1.05rem/1.65 var(--font-text);
}

body::before {
  content: "";
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 4;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0 3px,
    #00000014 3px 4px
  );
}

::selection { background: var(--accent); color: #041208; }

img { max-width: 100%; height: auto; }

a {
  color: var(--accent);
  text-decoration: none;
  text-shadow: var(--glow);
}

a:hover, a:focus-visible {
  color: var(--accent-hot);
  text-shadow: 0 0 14px var(--accent);
}

header, footer {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap) var(--pad);
  align-items: center;
  justify-content: space-between;
  padding: var(--pad) calc(var(--pad) + .4rem);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .08em;
}

header {
  position: sticky;
  top: 0;
  z-index: 3;
  background: linear-gradient(#060807e6, #060807cc);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 #3dff6e40, 0 12px 40px #00000055;
}

footer { color: var(--muted); }

.brand {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-style: normal;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  text-shadow: 0 0 16px var(--accent);
  background-image: none;
  padding: 0;
}

nav { display: flex; flex-wrap: wrap; gap: .35rem .4rem; align-items: center; }

nav a, header a {
  color: var(--muted);
  text-shadow: none;
  padding: .2rem .55rem;
  border-radius: 999px;
}

nav a:hover, nav a:focus-visible {
  color: var(--accent-hot);
  text-shadow: var(--glow);
}

nav a[aria-current="page"] {
  color: #041208;
  background: var(--accent);
  text-shadow: none;
  box-shadow: 0 0 18px var(--accent-soft);
}

main {
  width: min(var(--measure), calc(100% - 2 * var(--pad)));
  margin: calc(var(--gap) * 3) auto calc(var(--gap) * 5);
  position: relative;
  z-index: 1;
  flex: 1 0 auto;
}

h1, h2, h3 {
  color: var(--accent);
  font-weight: 500;
  line-height: 1.2;
  text-shadow: 0 0 22px #3dff6e55;
}

h1 { font-size: 2.6rem; margin: 0 0 1.2rem; }
h2 { font-size: 1.45rem; }
h3 { font-size: 1.15rem; }

p, ul, ol { margin: 0 0 var(--gap); }
.muted { color: var(--muted); }
.warn, .warn b { color: var(--warn); text-shadow: 0 0 12px #ff6b7a55; }

form, .prose { display: grid; gap: var(--gap); }
#preview[hidden], #content[hidden] { display: none !important; }
label, .field { display: grid; gap: .35rem; font-family: var(--font-mono); font-size: .85rem; letter-spacing: .04em; }

input, textarea, button, .btn {
  font: .95rem/1.4 var(--font-mono);
  color: var(--fg);
  background: #041208cc;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: .6rem .9rem;
}

textarea {
  min-height: 8rem;
  width: 100%;
  border-radius: 1.2rem;
}

#content { min-height: 18rem; }

.tabs { display: flex; flex-wrap: wrap; gap: .35rem; }

.tabs button {
  padding: .25rem .7rem;
  font-size: .78rem;
  color: var(--accent);
  background: transparent;
  border: 1px solid var(--line);
  box-shadow: none;
}

.tabs button[aria-pressed="true"] {
  color: #041208;
  background: var(--accent);
  outline: 0;
}

button, .btn {
  color: #041208;
  background: var(--accent);
  border: 0;
  text-decoration: none;
  cursor: pointer;
  display: inline-block;
  width: fit-content;
  letter-spacing: .06em;
  text-shadow: none;
  box-shadow: 0 0 18px var(--accent-soft);
}

button:hover, .btn:hover, button:focus-visible, .btn:focus-visible {
  background: var(--accent-hot);
  color: #041208;
  box-shadow: 0 0 26px var(--accent);
}

button[aria-pressed="true"] {
  outline: 2px solid var(--accent-hot);
  outline-offset: 2px;
}

.prose :is(pre, code) {
  font-family: var(--font-mono);
  background: #041208;
  border-radius: .6rem;
}

.gate {
  width: min(22rem, 100%);
  margin: 8vh auto 0;
  padding: 1.5rem 1.3rem 1.3rem;
  border: 1px solid var(--line);
  border-radius: var(--curve);
  background:
    linear-gradient(160deg, #3dff6e18, transparent 46%),
    var(--card);
  box-shadow: inset 0 1px 0 #ffffff14, 0 18px 40px #00000066;
}

.gate h1 { margin-bottom: .6rem; font-size: 1.8rem; }
.gate form { gap: .85rem; }
.gate button { width: 100%; }

@media (max-width: 40rem) {
  :root { --pad: .85rem; }
  header, footer { padding: .8rem; letter-spacing: .04em; }
  nav { gap: .15rem; }
  nav a { padding: .15rem .4rem; }
  h1 { font-size: 1.85rem; }
}