/* ============================================================
   KARPPOVIK — Guia de instalação e manutenção (página dedicada)
   ============================================================ */
@import url("karppovik-brand.css");
:root {
  --bg: #050507;
  --bg-2: #0b0b0f;
  --line: rgba(255, 255, 255, 0.08);
  --line-2: rgba(255, 255, 255, 0.14);
  --txt: #f5f5f7;
  --txt-2: #a8a8b3;
  --txt-3: #6a6a76;
  --red: #e10600;
  --red-2: #ff1f3a;
  --amber: #ffb020;
  --grad-red: linear-gradient(135deg, #ff1f3a 0%, #b80000 100%);
  --f-display: "Orbitron", system-ui, sans-serif;
  --f-head: "Rajdhani", system-ui, sans-serif;
  --f-body: "Inter", system-ui, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, monospace;
  --pad-x: clamp(20px, 4vw, 60px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
*::selection { background: var(--red); color: #fff; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  min-height: 100svh;
  background: var(--bg);
  color: var(--txt);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  display: flex;
  flex-direction: column;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

/* Technical grid backdrop */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 20%, transparent 80%);
  pointer-events: none;
  z-index: 0;
}

/* ===== Nav ===== */
.kpv-manual-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px var(--pad-x);
  border-bottom: 1px solid var(--line);
  background: rgba(5, 5, 7, 0.85);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.kpv-manual-nav__back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--f-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--txt-2);
  transition: color 0.3s var(--ease);
}
.kpv-manual-nav__back:hover { color: var(--red-2); }
.kpv-manual-nav__crumbs {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.kpv-manual-nav__parent {
  font-family: var(--f-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--txt-2);
  transition: color 0.3s var(--ease);
}
.kpv-manual-nav__parent:hover { color: var(--red-2); }
.kpv-manual-nav__brand img { width: 116px; height: auto; }

/* ===== Hero ===== */
.kpv-manual-hero {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: clamp(48px, 8vw, 96px) var(--pad-x) clamp(24px, 4vw, 48px);
  max-width: 880px;
  margin: 0 auto;
}
.kpv-manual-hero__eyebrow {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 0.7rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--red-2);
  margin-bottom: 18px;
}
.kpv-manual-hero__title {
  font-family: var(--f-head);
  font-weight: 700;
  font-size: clamp(1.9rem, 5vw, 3.2rem);
  line-height: 1.06;
  text-transform: uppercase;
  letter-spacing: -0.01em;
}
.kpv-manual-hero__title .accent { color: var(--red-2); }
.kpv-manual-hero__intro {
  color: var(--txt-2);
  font-size: clamp(0.98rem, 1.6vw, 1.1rem);
  line-height: 1.7;
  margin-top: 22px;
}

/* ===== Layout ===== */
.kpv-manual-wrap {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(24px, 4vw, 48px) var(--pad-x) clamp(60px, 8vw, 110px);
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

/* ===== Table of contents ===== */
.kpv-manual__toc {
  position: sticky;
  top: 88px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(11, 11, 15, 0.6);
  padding: 22px 20px;
}
.kpv-manual__toc h2 {
  font-family: var(--f-mono);
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--txt-3);
  margin-bottom: 14px;
}
.kpv-manual__toc ol {
  list-style: none;
  counter-reset: toc;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.kpv-manual__toc a {
  counter-increment: toc;
  display: block;
  padding: 8px 10px;
  border-radius: 8px;
  font-family: var(--f-head);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--txt-2);
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}
.kpv-manual__toc a::before {
  content: counter(toc, decimal-leading-zero) " · ";
  color: var(--red-2);
  font-family: var(--f-mono);
  font-size: 0.78rem;
}
.kpv-manual__toc a:hover { background: rgba(255, 31, 58, 0.08); color: var(--txt); }

/* ===== Content ===== */
.kpv-manual { min-width: 0; }
.kpv-manual__section { margin-bottom: clamp(40px, 6vw, 72px); scroll-margin-top: 88px; }
.kpv-manual__section-num {
  font-family: var(--f-mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  color: var(--red-2);
  text-transform: uppercase;
}
.kpv-manual__section h2 {
  font-family: var(--f-head);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.2rem);
  text-transform: uppercase;
  line-height: 1.1;
  margin: 8px 0 18px;
}
.kpv-manual__section h3 {
  font-family: var(--f-head);
  font-weight: 700;
  font-size: clamp(1.15rem, 2.2vw, 1.4rem);
  text-transform: uppercase;
  letter-spacing: 0.01em;
  margin: 32px 0 14px;
  padding: 10px 14px;
  background: rgba(255, 31, 58, 0.06);
  border: 1px solid rgba(255, 31, 58, 0.22);
  border-radius: 4px;
}
.kpv-manual p { color: var(--txt-2); margin: 0 0 16px; }
.kpv-manual strong { color: var(--txt); font-weight: 600; }
.kpv-manual em {
  font-style: normal;
  font-family: var(--f-mono);
  font-size: 0.92em;
  color: var(--red-2);
  letter-spacing: 0.02em;
}

/* Numbered steps */
.kpv-manual__steps {
  list-style: none;
  counter-reset: step;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 0 0 24px;
}
.kpv-manual__steps > li {
  counter-increment: step;
  position: relative;
  padding: 14px 16px 14px 58px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(11, 11, 15, 0.5);
  color: var(--txt-2);
}
.kpv-manual__steps > li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 14px;
  top: 12px;
  font-family: var(--f-mono);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--red-2);
  border: 1px solid var(--line-2);
  border-radius: 7px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
}
.kpv-manual__steps strong { color: var(--txt); }
.kpv-manual__steps ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 10px 0 2px;
  padding-left: 18px;
  color: var(--txt-2);
}
.kpv-manual__steps ul li { margin: 0; }

/* Alerts */
.kpv-manual__alert {
  position: relative;
  border-radius: 12px;
  padding: 16px 18px 16px 50px;
  margin: 20px 0;
  border: 1px solid var(--line-2);
  background: rgba(11, 11, 15, 0.6);
  color: var(--txt-2);
  font-size: 0.95rem;
}
.kpv-manual__alert::before {
  position: absolute;
  left: 16px;
  top: 16px;
  font-size: 1.1rem;
  line-height: 1;
}
.kpv-manual__alert strong { display: block; margin-bottom: 4px; color: var(--txt); font-family: var(--f-head); letter-spacing: 0.04em; text-transform: uppercase; font-size: 0.82rem; }
.kpv-manual__alert--critical {
  border-color: rgba(255, 31, 58, 0.5);
  background: rgba(255, 31, 58, 0.07);
}
.kpv-manual__alert--critical::before { content: "?"; color: var(--red-2); }
.kpv-manual__alert--critical strong { color: var(--red-2); }
.kpv-manual__alert--note {
  border-color: rgba(255, 176, 32, 0.4);
  background: rgba(255, 176, 32, 0.06);
}
.kpv-manual__alert--note::before { content: "?"; color: var(--amber); }
.kpv-manual__alert--note strong { color: var(--amber); }

/* Figures */
.kpv-manual__fig {
  margin: 20px 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(255, 31, 58, 0.06), transparent 70%),
    rgba(7, 7, 10, 0.7);
  overflow: hidden;
}
.kpv-manual__fig img,
.kpv-manual__fig svg { width: 100%; height: auto; display: block; }
.kpv-manual__fig figcaption {
  font-family: var(--f-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--txt-3);
  padding: 10px 16px 14px;
  border-top: 1px solid var(--line);
}
.kpv-manual__fig figcaption b { color: var(--red-2); font-weight: 500; }

/* Frequency cards */
.kpv-manual__freq {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 20px 0;
}
.kpv-manual__freq-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
  background: rgba(11, 11, 15, 0.5);
}
.kpv-manual__freq-card h4 {
  font-family: var(--f-head);
  text-transform: uppercase;
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--txt);
}
.kpv-manual__freq-card p { font-size: 0.9rem; margin: 0; }
.kpv-manual__freq-card .kbd {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 0.78rem;
  color: var(--red-2);
  margin-top: 8px;
}

.kpv-manual__closing {
  margin-top: 24px;
  padding: 18px 20px;
  border: 1px solid rgba(255, 31, 58, 0.28);
  border-radius: 4px;
  background: rgba(255, 31, 58, 0.05);
  color: var(--txt);
  font-family: var(--f-head);
  font-size: 1.05rem;
}

.kpv-manual__cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  padding: 12px 22px;
  border-radius: 10px;
  background: var(--grad-red);
  color: #fff;
  font-family: var(--f-head);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.85rem;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.kpv-manual__cta:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -14px rgba(255, 31, 58, 0.7); }

/* ===== Footer ===== */
.kpv-manual-foot {
  position: relative;
  z-index: 1;
  margin-top: auto;
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  align-items: center;
  text-align: center;
  justify-content: center;
  gap: 10px;
  padding: 28px var(--pad-x);
  border-top: 1px solid var(--line);
  color: var(--txt-3);
  font-size: 0.85rem;
}
.kpv-manual-foot a { color: var(--txt-2); transition: color 0.3s var(--ease); }
.kpv-manual-foot a:hover { color: var(--red-2); }

/* ===== Responsive ===== */
@media (max-width: 860px) {
  .kpv-manual-wrap { grid-template-columns: 1fr; }
  .kpv-manual__toc {
    position: static;
    order: -1;
  }
  .kpv-manual__toc ol { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .kpv-manual__cta { transition: none; }
}