/* PLC Pocket — HMI/panel landing. Dark industrial, live-signal accent. */
:root {
  --bg: #0b1417;
  --bg2: #0e1b20;
  --panel: #12242a;
  --panel2: #162c33;
  --line: #21363e;
  --ink: #eaf1f2;
  --dim: #8aa1a9;
  --signal: #31d0ba;
  --signal-dim: #1c7a6e;
  --amber: #f5a623;
  --brown: #c7895c;
  --blue: #4fa3e3;
  --maxw: 1160px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: "Inter", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  /* faint oscilloscope grid */
  background-image:
    linear-gradient(rgba(49, 208, 186, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(49, 208, 186, 0.035) 1px, transparent 1px);
  background-size: 40px 40px;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.mono { font-family: "IBM Plex Mono", monospace; }
.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--signal);
  text-transform: uppercase;
}
h1, h2, h3 { font-family: "Space Grotesk", sans-serif; font-weight: 600; letter-spacing: -0.01em; }

/* ── Nav ─────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 20, 23, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; gap: 22px; height: 62px; }
.brand {
  font-family: "IBM Plex Mono", monospace;
  font-weight: 600; letter-spacing: 0.1em; font-size: 0.9rem;
  display: flex; align-items: center; gap: 9px;
}
.brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 10px var(--signal); }
.nav nav { margin-left: auto; display: flex; align-items: center; gap: 24px; }
.nav nav a { color: var(--dim); text-decoration: none; font-size: 0.9rem; }
.nav nav a:hover { color: var(--ink); }
.nav .navcta {
  background: var(--signal); color: #04231f; font-weight: 600;
  padding: 8px 16px; border-radius: 9px; font-size: 0.88rem;
}
.nav .navcta:hover { color: #04231f; filter: brightness(1.08); }
.lang { font-family: "IBM Plex Mono", monospace; font-size: 0.8rem; border: 1px solid var(--line); padding: 4px 9px; border-radius: 7px; }

/* ── Hero ────────────────────────────────────────── */
.hero { padding: 76px 0 56px; }
.hero .wrap { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(2.3rem, 5vw, 3.7rem); line-height: 1.04; margin: 18px 0 20px; }
.hero h1 .accent { color: var(--signal); }
.hero .sub { color: var(--dim); font-size: 1.08rem; max-width: 46ch; }
.hero .btns { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.btn { font-family: "Space Grotesk", sans-serif; font-weight: 600; text-decoration: none; padding: 13px 22px; border-radius: 10px; font-size: 1rem; display: inline-flex; align-items: center; gap: 8px; transition: transform 0.12s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--signal); color: #04231f; }
.btn-ghost { border: 1px solid var(--line); color: var(--ink); }
.btn-ghost:hover { border-color: var(--signal); }
.hero .platforms { margin-top: 18px; font-family: "IBM Plex Mono", monospace; font-size: 0.76rem; color: var(--dim); }

/* Phone mockup with a live signal screen */
.device { justify-self: center; width: 260px; }
.phone {
  border: 2px solid #2b444d; border-radius: 30px; background: #0a1013;
  padding: 12px; box-shadow: 0 30px 70px rgba(0,0,0,0.5), 0 0 0 1px rgba(49,208,186,0.08);
}
.phone .screen { border-radius: 20px; overflow: hidden; background: var(--bg2); }
.phone .app-bar { display: flex; align-items: center; justify-content: space-between; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.phone .app-bar b { font-family: "Space Grotesk", sans-serif; font-size: 0.9rem; }
.phone .app-bar .pro { font-family: "IBM Plex Mono", monospace; font-size: 0.6rem; background: rgba(245,166,35,0.16); color: var(--amber); padding: 2px 6px; border-radius: 6px; }
.phone .scope { padding: 12px 14px 6px; }
.phone .scope .label { font-family: "IBM Plex Mono", monospace; font-size: 0.62rem; color: var(--dim); display: flex; justify-content: space-between; }
.scope-box { height: 92px; border: 1px solid var(--line); border-radius: 8px; margin-top: 6px; overflow: hidden; position: relative; background:
  linear-gradient(rgba(49,208,186,0.06) 1px, transparent 1px),
  linear-gradient(90deg, rgba(49,208,186,0.06) 1px, transparent 1px);
  background-size: 16px 16px; }
.scope-svg { position: absolute; inset: 0; width: 200%; height: 100%; animation: scroll 6s linear infinite; }
@keyframes scroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.phone .mini-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 10px 14px 16px; }
.phone .tile { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 9px; }
.phone .tile .ic { width: 22px; height: 22px; border-radius: 6px; background: rgba(49,208,186,0.14); display: grid; place-items: center; color: var(--signal); font-size: 12px; }
.phone .tile .tl { font-size: 0.66rem; margin-top: 6px; color: var(--ink); }
.phone .tile .ts { font-size: 0.56rem; color: var(--dim); }

/* ── Section scaffold ────────────────────────────── */
.section { padding: 66px 0; border-top: 1px solid var(--line); }
.sec-tag { font-family: "IBM Plex Mono", monospace; font-size: 0.72rem; letter-spacing: 0.14em; color: var(--signal); }
.sec-h { font-size: clamp(1.5rem, 3.4vw, 2.2rem); margin: 8px 0 6px; }
.sec-lead { color: var(--dim); max-width: 56ch; }

/* ── Tools ───────────────────────────────────────── */
.cats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 32px; }
.cat { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 22px; transition: border-color 0.15s ease, transform 0.15s ease; }
.cat:hover { transform: translateY(-3px); border-color: var(--catc, var(--signal)); }
.cat .code { font-family: "IBM Plex Mono", monospace; font-size: 0.7rem; letter-spacing: 0.1em; color: var(--catc, var(--signal)); }
.cat h3 { font-size: 1.15rem; margin: 6px 0 12px; }
.cat ul { list-style: none; display: flex; flex-wrap: wrap; gap: 7px; }
.cat li { font-size: 0.82rem; color: var(--dim); background: var(--bg2); border: 1px solid var(--line); border-radius: 20px; padding: 4px 11px; }
.cat li.pro::after { content: "PRO"; font-family: "IBM Plex Mono", monospace; font-size: 0.56rem; color: var(--amber); margin-left: 6px; }

/* ── Browser band ────────────────────────────────── */
.band { background: var(--bg2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.band .wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; padding: 56px 24px; }
.band h2 { font-size: 1.7rem; margin-bottom: 12px; }
.band p { color: var(--dim); }
.wire-legend { display: flex; gap: 18px; margin-top: 20px; font-family: "IBM Plex Mono", monospace; font-size: 0.74rem; color: var(--dim); }
.wire-legend span { display: inline-flex; align-items: center; gap: 7px; }
.wire-legend i { width: 14px; height: 3px; border-radius: 2px; display: inline-block; }

/* ── Academy ─────────────────────────────────────── */
.lessons { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 30px; }
.lessons a { display: block; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; text-decoration: none; color: var(--ink); transition: border-color 0.15s ease; }
.lessons a:hover { border-color: var(--signal); }
.lessons a b { font-family: "Space Grotesk", sans-serif; font-weight: 600; font-size: 0.98rem; }
.lessons a small { display: block; color: var(--dim); font-size: 0.82rem; margin-top: 4px; }
.lessons a .go { font-family: "IBM Plex Mono", monospace; font-size: 0.7rem; color: var(--signal); }

/* ── Pricing ─────────────────────────────────────── */
.prices { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 32px; max-width: 820px; }
.price { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 28px; }
.price.pro { border-color: var(--amber); box-shadow: 0 0 0 1px rgba(245,166,35,0.25), 0 20px 50px rgba(0,0,0,0.35); }
.price .plan { font-family: "IBM Plex Mono", monospace; font-size: 0.74rem; letter-spacing: 0.12em; color: var(--dim); }
.price.pro .plan { color: var(--amber); }
.price .amt { font-family: "Space Grotesk", sans-serif; font-size: 2rem; font-weight: 600; margin: 8px 0 2px; }
.price .amt small { font-size: 0.9rem; color: var(--dim); font-weight: 400; }
.price ul { list-style: none; margin: 18px 0 22px; }
.price li { font-size: 0.9rem; padding: 6px 0 6px 24px; position: relative; color: var(--ink); }
.price li::before { content: "✓"; position: absolute; left: 0; color: var(--signal); }
.price.pro li::before { color: var(--amber); }
.price .btn { width: 100%; justify-content: center; }
.price .note { font-family: "IBM Plex Mono", monospace; font-size: 0.68rem; color: var(--dim); margin-top: 10px; text-align: center; }

/* ── Footer ──────────────────────────────────────── */
.foot { border-top: 1px solid var(--line); padding: 30px 0; }
.foot .wrap { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; font-family: "IBM Plex Mono", monospace; font-size: 0.76rem; color: var(--dim); }
.foot a { color: var(--dim); text-decoration: none; }
.foot a:hover { color: var(--signal); }

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 860px) {
  .hero .wrap, .band .wrap { grid-template-columns: 1fr; }
  .device { grid-row: 1; margin-bottom: 12px; }
  .cats, .lessons, .prices { grid-template-columns: 1fr; }
  .nav nav a:not(.navcta):not(.lang) { display: none; }
}
@media (prefers-reduced-motion: reduce) { .scope-svg { animation: none; } }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; }