/* W9APZ - single stylesheet, no framework, no build step.
   Design tokens up top so restyling is one edit, not fifty. */

:root {
    --bg:        #0d1117;
    --bg-card:   #161b22;
    --bg-code:   #0a0d12;
    --line:      #262d36;
    --text:      #d7dde5;
    --text-dim:  #8b949e;
    --accent:    #f0a202;   /* amber - dial lamp */
    --accent-2:  #3fb950;   /* green - carrier detect */
    --blue:      #6ea8fe;   /* GMRS + club affiliation */
    --violet:    #bc8cff;   /* other people's repeaters */
    --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
    --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
    --radius: 10px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

/* The nav is sticky, so anchor jumps would otherwise park the heading
   underneath it. Offset every jump target by a bit more than nav height. */
[id] { scroll-margin-top: 4.5rem; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

.wrap { width: min(920px, 92vw); margin-inline: auto; }
.mono { font-family: var(--mono); }
.accent { color: var(--accent); }

/* ---------- a11y ---------- */

/* Off-screen until keyboard-focused, then flies in as a real button. */
.skip {
    position: absolute;
    top: .5rem;
    left: .5rem;
    z-index: 20;
    padding: .55rem 1.1rem;
    border-radius: var(--radius);
    background: var(--accent);
    color: #000;
    font-family: var(--mono);
    font-size: .85rem;
    text-decoration: none;
    transform: translateY(-150%);
    transition: transform .15s;
}

.skip:focus { transform: translateY(0); }

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 2px;
}

/* ---------- hero ---------- */

.hero {
    padding: 4.5rem 0 3rem;
    text-align: center;
    background:
        radial-gradient(ellipse at 50% -20%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 60%),
        var(--bg);
    border-bottom: 1px solid var(--line);
}

.eyebrow {
    margin: 0;
    font-family: var(--mono);
    font-size: .78rem;
    letter-spacing: .28em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.call {
    margin: .3rem 0 .2rem;
    font-size: clamp(3rem, 13vw, 6rem);
    font-weight: 800;
    letter-spacing: .06em;
    line-height: 1;
    background: linear-gradient(180deg, #fff 25%, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.tagline { margin: 0 0 1.4rem; color: var(--text-dim); }

.badges { display: flex; gap: .5rem; justify-content: center; flex-wrap: wrap; }

.badge {
    font-family: var(--mono);
    font-size: .75rem;
    padding: .3rem .7rem;
    border: 1px solid var(--line);
    border-radius: 100px;
    color: var(--text-dim);
    background: var(--bg-card);
}

.badge.on { color: var(--accent-2); border-color: rgba(63,185,80,.4); }

/* GMRS is a separate radio service from amateur - styled distinctly so the
   two licences don't read as one. */
.badge.alt { color: var(--blue); border-color: color-mix(in srgb, var(--blue) 35%, transparent); }

.dot {
    display: inline-block;
    width: 7px; height: 7px;
    margin-right: .45rem;
    border-radius: 50%;
    background: var(--accent-2);
    box-shadow: 0 0 8px var(--accent-2);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse { 50% { opacity: .35; } }

/* Respect users who don't want motion. */
@media (prefers-reduced-motion: reduce) {
    .dot { animation: none; }
    html { scroll-behavior: auto; }
    .skip { transition: none; }
}

/* ---------- nav ---------- */

.nav {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(13,17,23,.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}

.nav .wrap { display: flex; gap: 1.6rem; padding: .85rem 0; }

.nav a {
    font-family: var(--mono);
    font-size: .82rem;
    color: var(--text-dim);
    text-decoration: none;
    transition: color .15s;
}

.nav a:hover { color: var(--accent); }

/* ---------- cards ---------- */

main { padding: 2.5rem 0 3rem; }

.card {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1.75rem;
    margin-bottom: 1.5rem;
}

.card h2 {
    margin: 0 0 .9rem;
    font-size: 1.35rem;
    border-bottom: 1px solid var(--line);
    padding-bottom: .6rem;
}

.card h3 {
    margin: 0 0 .5rem;
    font-size: .8rem;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--accent);
}

.card p { margin: 0 0 1rem; }
.card ul { margin: 0; padding-left: 1.1rem; color: var(--text-dim); }
.card li { margin-bottom: .55rem; }
.card li strong { color: var(--text); font-weight: 600; }
h3.spaced { margin-top: 1.25rem; }

/* ---------- spec list ---------- */

.specs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: .9rem;
    margin: 0 0 1.2rem;
}

.specs > div { border-left: 2px solid var(--accent); padding-left: .8rem; }

.specs dt {
    font-size: .7rem;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.specs dd { margin: 0; font-weight: 600; }

/* ---------- misc ---------- */

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.code {
    background: var(--bg-code);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1rem;
    overflow-x: auto;
    font-family: var(--mono);
    font-size: .85rem;
    color: var(--accent-2);
}

.code .c { color: var(--text-dim); }

.btn {
    display: inline-block;
    font-family: var(--mono);
    font-size: .85rem;
    padding: .55rem 1.1rem;
    border: 1px solid var(--accent);
    border-radius: 100px;
    color: var(--accent);
    text-decoration: none;
    transition: background .15s, color .15s;
}

.btn:hover { background: var(--accent); color: #000; }

.btn.ghost { border-color: var(--line); color: var(--text-dim); margin-left: .5rem; }
.btn.ghost:hover { background: transparent; border-color: var(--text-dim); color: var(--text); }

.fine { font-size: .85rem; color: var(--text-dim); }

/* Each affiliation gets its own hue so they read as distinct places rather
   than one continuous wall of text. The hue is a single variable - adding a
   variant means setting --cal and nothing else. */
.callout {
    --cal: var(--accent);
    margin: 1rem 0;
    border: 1px solid color-mix(in srgb, var(--cal) 35%, transparent);
    border-left: 3px solid var(--cal);
    border-radius: var(--radius);
    background: color-mix(in srgb, var(--cal) 7%, transparent);
    padding: 1rem 1.2rem;
}

.callout h3 { margin-top: 0; color: var(--cal); }
.callout p { margin: 0; }
.callout a { color: var(--cal); text-decoration: none; border-bottom: 1px dotted currentColor; }
.callout a:hover { border-bottom-style: solid; }

/* Row of external reference links at the foot of a callout. */
.callout .refs { margin-top: .7rem; font-family: var(--mono); font-size: .78rem; }
.callout .refs a { margin-right: .4rem; }

.callout.alt    { --cal: var(--blue); }
.callout.remote { --cal: var(--violet); }

.links { display: flex; flex-wrap: wrap; gap: 1.4rem; align-items: center; }
.links h2 { width: 100%; }
.links a { color: var(--accent); text-decoration: none; font-family: var(--mono); font-size: .88rem; }
.links a:hover { text-decoration: underline; }

footer {
    border-top: 1px solid var(--line);
    padding: 2rem 0 3rem;
    text-align: center;
    color: var(--text-dim);
}

footer p { margin: .2rem 0; }