/* pro28.com — black / chrome / glossy red, off the logo. */

:root {
  --black: #000;
  --panel: #0b0b0d;
  --panel2: #121216;
  --line: #24242b;
  --line2: #33333d;
  --text: #e9e9ee;
  --dim: #9a9aa6;
  --red: #e8112d;
  --red-hi: #ff3b4e;
  --red-lo: #9d0011;
  --chrome-hi: #ffffff;
  --chrome-mid: #cfd3d8;
  --chrome-lo: #7d838c;
  --font: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  margin: 0;
  background: var(--black);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--red-hi); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- header ---------- */

.top {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px;
  padding: 10px 26px;
  background: rgba(0, 0, 0, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.top::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--red), transparent);
  opacity: .55;
}
.brand img { display: block; height: 46px; width: auto; }
.topnav { display: flex; gap: 22px; font-size: 13px; letter-spacing: .14em; text-transform: uppercase; }
.topnav a { color: var(--dim); }
.topnav a:hover { color: #fff; text-decoration: none; }

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

.hero {
  position: relative;
  padding: 68px 26px 54px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(1100px 380px at 50% -80px, rgba(232, 17, 45, .20), transparent 70%),
    linear-gradient(180deg, #0a0a0c, #000);
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: repeating-linear-gradient(115deg, rgba(255,255,255,.022) 0 2px, transparent 2px 9px);
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 980px; margin: 0 auto; text-align: center; }

.eyebrow {
  margin: 0 0 14px;
  font-size: 12px; letter-spacing: .30em; text-transform: uppercase;
  color: var(--dim);
}
.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(34px, 6vw, 62px);
  line-height: 1.02;
  font-weight: 900;
  font-style: italic;
  letter-spacing: -.02em;
  text-transform: uppercase;
  background: linear-gradient(180deg, var(--chrome-hi) 0%, var(--chrome-mid) 45%, var(--chrome-lo) 56%, #eef1f4 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.lede { max-width: 760px; margin: 0 auto 26px; color: #c3c3cd; font-size: 17px; }

.badges { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.badge {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--line2);
  border-radius: 999px;
  background: #101014;
  color: var(--dim);
  font-size: 12px; letter-spacing: .12em; text-transform: uppercase; font-weight: 600;
}
.badge.red {
  border-color: transparent; color: #fff;
  background: linear-gradient(180deg, var(--red-hi), var(--red) 55%, var(--red-lo));
  box-shadow: 0 0 22px rgba(232, 17, 45, .35);
}
.badge.link { color: var(--dim); }
.badge.link:hover { color: #fff; text-decoration: none; border-color: var(--red); }

/* ---------- classes (above the fold — the point of the page) ---------- */

.hero.tight { padding: 40px 26px 32px; }

.classwrap { max-width: 1320px; margin: 0 auto; padding: 34px 26px 10px; }
.classhead { margin-bottom: 20px; text-align: center; }
.classhead h2 {
  margin: 0 0 6px;
  font-size: clamp(22px, 3vw, 30px); font-weight: 900; font-style: italic;
  text-transform: uppercase; letter-spacing: .01em; color: #fff;
}
.classhead p { margin: 0 auto; max-width: 720px; color: var(--dim); font-size: 15px; }

.classgrid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(272px, 1fr));
  gap: 16px;
}

.klass {
  position: relative;
  padding: 18px 20px 16px;
  background: linear-gradient(180deg, var(--panel2), var(--panel));
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
.klass::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--red-hi), var(--red-lo));
}
.klass:hover { border-color: var(--line2); }
.klass h3 {
  margin: 0;
  font-size: 21px; font-weight: 900; font-style: italic;
  text-transform: uppercase; letter-spacing: .01em;
  background: linear-gradient(180deg, var(--chrome-hi), var(--chrome-mid) 52%, var(--chrome-lo) 53%, #f4f6f8);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.ktag {
  margin: 4px 0 12px;
  font-size: 12px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--red-hi); font-weight: 700;
}

.klass dl { margin: 0; }
.klass dl > div {
  display: grid; grid-template-columns: 92px minmax(0, 1fr); gap: 10px;
  padding: 7px 0;
  border-top: 1px solid var(--line);
}
.klass dl > div:first-child { border-top: 0; }
.klass dt {
  font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase;
  color: #71717d; padding-top: 2px;
}
.klass dd { margin: 0; font-size: 14px; color: #d2d2dc; }

/* ---------- layout ---------- */

.wrap {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 48px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 46px 26px 80px;
}

.toc-inner { position: sticky; top: 92px; }
.toc-h {
  margin: 0 0 12px;
  font-size: 11px; letter-spacing: .26em; text-transform: uppercase; color: var(--dim);
}
.toc a {
  display: block;
  padding: 7px 12px;
  margin-left: -12px;
  border-left: 2px solid var(--line);
  color: var(--dim);
  font-size: 14px;
}
.toc a:hover {
  color: #fff; border-left-color: var(--red);
  background: linear-gradient(90deg, rgba(232,17,45,.10), transparent);
  text-decoration: none;
}

/* ---------- rules ---------- */

.rule {
  padding: 26px 28px;
  margin-bottom: 20px;
  background: linear-gradient(180deg, var(--panel2), var(--panel));
  border: 1px solid var(--line);
  border-radius: 10px;
}
.rule h2 {
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 20px; font-weight: 800; font-style: italic;
  letter-spacing: .01em; text-transform: uppercase;
  color: #fff;
}
.rule h2::before {
  content: ""; display: inline-block;
  width: 4px; height: 17px; margin-right: 11px;
  vertical-align: -2px; border-radius: 2px;
  background: linear-gradient(180deg, var(--red-hi), var(--red-lo));
}
.rule h3 { margin: 22px 0 8px; font-size: 16px; color: #fff; letter-spacing: .04em; text-transform: uppercase; }
.rule h4 { margin: 18px 0 6px; font-size: 14px; color: #d7d7e0; }
.rule p { margin: 0 0 12px; color: #c9c9d3; }
.rule strong { color: #fff; font-weight: 700; }
.rule ul, .rule ol { margin: 0 0 14px; padding-left: 22px; color: #c9c9d3; }
.rule li { margin-bottom: 7px; }
.rule li::marker { color: var(--red); }
.rule hr { border: 0; border-top: 1px solid var(--line); margin: 20px 0; }
.empty { color: var(--dim); }

/* ---------- footer ---------- */

.foot {
  padding: 36px 26px 52px;
  text-align: center;
  border-top: 1px solid var(--line);
  background: #050506;
  color: var(--dim);
  font-size: 13px;
}
.foot > div {
  font-size: 26px; font-weight: 900; font-style: italic; letter-spacing: .02em;
  background: linear-gradient(180deg, #fff, var(--chrome-lo));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.foot > div span {
  background: linear-gradient(180deg, var(--red-hi), var(--red-lo));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.foot p { margin: 8px 0 0; }
.fine { font-size: 12px; color: #63636e; }

@media (max-width: 860px) {
  .wrap { grid-template-columns: 1fr; gap: 26px; padding-top: 30px; }
  .toc-inner { position: static; }
  .toc { display: flex; flex-wrap: wrap; gap: 6px; }
  .brand img { height: 34px; }
}