/* =====================================================================
   AFG SERVICES — Engenharia Elétrica
   Dark industrial / control-room aesthetic
   Barlow Condensed + Manrope + JetBrains Mono
   Primary: Amber #f5a623 (alta tensão) · Secondary: Blue #2d9cdb (digital)
   ===================================================================== */

:root {
  /* depth layers */
  --void:        #080b10;
  --panel:       #0c1018;
  --surface:     #111826;
  --surface-mid: #162130;

  /* borders */
  --wire:        rgba(60, 130, 200, 0.12);
  --wire-mid:    rgba(60, 130, 200, 0.22);
  --wire-strong: rgba(60, 130, 200, 0.38);
  --wire-amber:  rgba(245, 166, 35, 0.38);

  /* text */
  --ink:         #dde9f2;
  --ink-soft:    #6e8fa8;
  --ink-faint:   #3a5268;

  /* accent — electrical (amber / alta tensão) */
  --amber:       #f5a623;
  --amber-dim:   rgba(245, 166, 35, 0.08);
  --amber-shade: #c8841a;

  /* accent — digital / automation (blue) */
  --blue:        #2d9cdb;
  --blue-dim:    rgba(45, 156, 219, 0.08);

  /* type */
  --font-display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --font-body:    "Manrope", system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", "Menlo", "Consolas", monospace;

  /* layout */
  --shell:        min(1240px, calc(100vw - 3rem));
  --shell-narrow: min(960px, calc(100vw - 3rem));
  --hairline:     1px solid var(--wire);
  --hairline-mid: 1px solid var(--wire-mid);
  --hairline-strong: 1px solid var(--wire-strong);
}

/* ----- reset ----- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  background-color: var(--void);
  background-image:
    linear-gradient(rgba(45, 100, 180, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 100, 180, 0.055) 1px, transparent 1px),
    linear-gradient(rgba(45, 100, 180, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 100, 180, 0.022) 1px, transparent 1px);
  background-size: 160px 160px, 160px 160px, 40px 40px, 40px 40px;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
}

::selection {
  background: var(--amber);
  color: var(--void);
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; }
ul, ol { list-style: none; margin: 0; padding: 0; }
p { margin: 0; }

h1, h2, h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 0.93;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

h1 em, h2 em, h3 em {
  font-style: italic;
  font-weight: 400;
  color: var(--amber);
  text-transform: none;
  letter-spacing: -0.02em;
}

/* ----- typography utilities ----- */
.eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.ix {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--amber);
  text-transform: uppercase;
}

/* ----- skip link ----- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 1000;
  padding: 0.7rem 1rem;
  background: var(--amber);
  color: var(--void);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
}
.skip-link:focus { top: 1rem; }

/* =====================================================================
   BUTTONS
   ===================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.82rem 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background: transparent;
  color: var(--ink-soft);
  border: var(--hairline-mid);
  cursor: pointer;
  transition: background 220ms ease, color 220ms ease, border-color 220ms ease, transform 200ms ease;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--amber-dim);
  transform: translateX(-100%);
  transition: transform 300ms cubic-bezier(0.65, 0, 0.35, 1);
}

.btn:hover::before, .btn:focus-visible::before { transform: translateX(0); }

.btn:hover, .btn:focus-visible {
  border-color: var(--amber);
  color: var(--amber);
  transform: translateY(-1px);
}

.btn:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.btn--primary {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--void);
  font-weight: 600;
}

.btn--primary::before { background: rgba(0, 0, 0, 0.12); }

.btn--primary:hover, .btn--primary:focus-visible {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--void);
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn--ghost { border-color: var(--wire-mid); color: var(--ink-soft); }

.btn--ghost:hover, .btn--ghost:focus-visible {
  color: var(--ink);
  border-color: var(--wire-strong);
}

/* =====================================================================
   MASTHEAD
   ===================================================================== */
.masthead {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(8, 11, 16, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: var(--hairline-mid);
}

/* amber signal line across top */
.masthead::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--amber) 0%, rgba(245, 166, 35, 0.3) 50%, transparent 100%);
}

.masthead__inner {
  width: var(--shell);
  margin-inline: auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.5rem;
  padding: 0.9rem 0;
}

.masthead__brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.masthead__brand strong {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink);
  white-space: nowrap;
}

.brand-mark {
  color: var(--amber);
  font-style: normal;
}

.brand-mono {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
  white-space: nowrap;
  padding: 0.22rem 0.5rem;
  border: var(--hairline);
  background: var(--panel);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: end;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.site-nav > a {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  transition: color 200ms ease;
}

.site-nav > a:hover, .site-nav > a:focus-visible { color: var(--ink); }

.site-nav .nav__index {
  color: var(--amber);
  font-size: 0.62rem;
}

.site-nav .nav__cta {
  background: var(--amber);
  color: var(--void);
  padding: 0.52rem 1rem;
  letter-spacing: 0.16em;
  font-weight: 600;
  transition: filter 200ms ease, transform 200ms ease;
}

.site-nav .nav__cta:hover, .site-nav .nav__cta:focus-visible {
  filter: brightness(1.12);
  color: var(--void);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 2.4rem;
  height: 2.4rem;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: var(--panel);
  border: var(--hairline-mid);
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  width: 1.1rem;
  height: 1px;
  background: var(--amber);
}

/* =====================================================================
   HERO — §00
   ===================================================================== */
.hero {
  position: relative;
  width: var(--shell);
  margin-inline: auto;
  padding: 5rem 0 6rem;
  border-bottom: var(--hairline-mid);
}

/* technical readout bar */
.hero::before {
  content: "SYS: ONLINE · REV. 04/2026 · STATUS: OPERACIONAL · CERT. CREA/PB · EST. 26.12.1996";
  display: block;
  margin-bottom: 3.2rem;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--amber);
  opacity: 0.55;
  border-top: 1px solid var(--wire-amber);
  padding-top: 0.65rem;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.hero__layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 1fr);
  gap: 4rem;
  align-items: end;
}

.hero__lead { min-width: 0; }

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 2rem;
  padding: 0.48rem 0.85rem;
  border: var(--hairline-mid);
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* status indicator dot */
.hero__eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 8px var(--amber), 0 0 16px rgba(245, 166, 35, 0.4);
  flex-shrink: 0;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(3.2rem, 9vw, 8.2rem);
  line-height: 0.88;
  letter-spacing: -0.02em;
  margin-bottom: 1.8rem;
}

.hero__lede {
  max-width: 52ch;
  font-size: clamp(1rem, 1.4vw, 1.1rem);
  line-height: 1.68;
  color: var(--ink-soft);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.5rem;
}

/* engineering drawing title block */
.spec {
  border: 1px solid var(--wire-strong);
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  box-shadow:
    0 0 0 1px var(--wire),
    0 24px 48px -20px rgba(0, 0, 0, 0.6);
}

.spec__head,
.spec__foot {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 1rem;
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.spec__head {
  background: var(--amber);
  color: var(--void);
  font-weight: 700;
}

.spec__foot {
  background: var(--surface);
  color: var(--ink-faint);
  border-top: var(--hairline-mid);
}

.spec dl { margin: 0; }

.spec__row {
  display: grid;
  grid-template-columns: 9rem 1fr;
  border-top: var(--hairline-mid);
}

.spec__row dt {
  margin: 0;
  padding: 0.62rem 0.9rem;
  border-right: var(--hairline-mid);
  background: var(--surface);
  font-size: 0.6rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
  align-self: stretch;
}

.spec__row dd {
  margin: 0;
  padding: 0.62rem 1rem;
  font-family: var(--font-body);
  font-size: 0.94rem;
  font-weight: 500;
  line-height: 1.3;
  color: var(--ink);
}

/* engineering drawing crosshairs */
.crosshair {
  position: absolute;
  width: 20px;
  height: 20px;
  pointer-events: none;
  z-index: 1;
}

.crosshair::before,
.crosshair::after {
  content: "";
  position: absolute;
  background: var(--amber);
}

.crosshair::before {
  top: 50%; left: 0; right: 0;
  height: 1px;
  transform: translateY(-0.5px);
  box-shadow: 0 0 6px rgba(245, 166, 35, 0.6);
}

.crosshair::after {
  left: 50%; top: 0; bottom: 0;
  width: 1px;
  transform: translateX(-0.5px);
  box-shadow: 0 0 6px rgba(245, 166, 35, 0.6);
}

.crosshair--tl { top: 1.2rem; left: -10px; }
.crosshair--tr { top: 1.2rem; right: -10px; }
.crosshair--bl { bottom: 1.2rem; left: -10px; }
.crosshair--br { bottom: 1.2rem; right: -10px; }

/* =====================================================================
   CHAPTER framework
   ===================================================================== */
.chapter {
  position: relative;
  width: var(--shell);
  margin-inline: auto;
  padding: 5.5rem 0 6rem;
  border-bottom: var(--hairline);
}

.chapter:last-of-type { border-bottom: 0; }

.chapter__head {
  display: grid;
  grid-template-columns: 6rem minmax(0, 1fr);
  column-gap: 2.4rem;
  row-gap: 0.6rem;
  margin-bottom: 3.5rem;
}

.chapter__index {
  grid-column: 1;
  grid-row: 1 / span 3;
  align-self: start;
  padding-top: 0.6rem;
  border-top: 2px solid var(--amber);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  font-feature-settings: "tnum" 1;
}

/* digital/automation sections use blue index */
[data-section="digital"] .chapter__index {
  border-top-color: var(--blue);
  color: var(--blue);
}

.chapter__head .eyebrow { grid-column: 2; }

.chapter__head h2 {
  grid-column: 2;
  font-size: clamp(2.4rem, 5.5vw, 4.8rem);
  line-height: 0.91;
  letter-spacing: -0.01em;
  max-width: 20ch;
  margin-top: 0.4rem;
}

.chapter__head .chapter__lede {
  grid-column: 2;
  margin-top: 1.4rem;
  max-width: 60ch;
  font-size: 1.05rem;
  line-height: 1.62;
  color: var(--ink-soft);
}

/* italic emphasis delayed reveal */
.js .chapter__head h2 em,
.js .hero h1 em {
  opacity: 0;
  transition: opacity 700ms ease 540ms;
}

.js .chapter__head.is-visible h2 em,
.js .hero__lead.is-visible h1 em { opacity: 1; }

/* ----- inverse chapter (Diferenciais) ----- */
.chapter--inverse {
  width: 100vw;
  margin-inline: calc(50% - 50vw);
  padding: 0;
  border-bottom: 0;
  border-top: var(--hairline-mid);
  border-bottom: var(--hairline-mid);
  background: var(--surface);
  overflow: hidden;
}

/* diagonal hatching overlay */
.chapter--inverse::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 12px,
    rgba(245, 166, 35, 0.012) 12px,
    rgba(245, 166, 35, 0.012) 13px
  );
  pointer-events: none;
  z-index: 0;
}

.chapter--inverse__inner {
  width: var(--shell);
  margin-inline: auto;
  padding: 6rem 0;
  position: relative;
  z-index: 1;
}

.chapter--inverse .eyebrow,
.chapter--inverse .chapter__lede { color: var(--ink-soft); }

.chapter--inverse .chapter__index {
  color: var(--amber);
  border-top-color: var(--amber);
}

.chapter--inverse h2 em { color: var(--amber); }

/* ----- two-column body ----- */
.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 4rem;
  align-items: start;
}

.prose p {
  max-width: 56ch;
  font-size: 1.02rem;
  line-height: 1.72;
  color: var(--ink-soft);
  margin-bottom: 1.2rem;
}
.prose p:last-child { margin-bottom: 0; }

/* ----- ledger panel (sobre) ----- */
.ledger {
  border: var(--hairline-mid);
  background: var(--panel);
}

.ledger__label {
  margin: 0;
  padding: 0.62rem 1rem;
  background: var(--amber);
  color: var(--void);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  font-weight: 700;
}

.ledger dl { margin: 0; }

.ledger dl > div {
  display: grid;
  grid-template-columns: 9rem 1fr;
  border-top: var(--hairline);
}

.ledger dt {
  margin: 0;
  padding: 0.62rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border-right: var(--hairline);
  background: var(--surface);
}

.ledger dd {
  margin: 0;
  padding: 0.62rem 1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.3;
  color: var(--ink);
}

/* =====================================================================
   REGISTER — engineering services (§02, §03)
   ===================================================================== */
.register { border-top: 2px solid var(--wire-mid); }

.register__row {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1.25fr) minmax(0, 1.5fr);
  column-gap: 2.4rem;
  row-gap: 0.4rem;
  padding: 2rem 0;
  border-bottom: var(--hairline);
  align-items: baseline;
  position: relative;
  transition: background 240ms ease;
}

/* amber sweep line on hover */
.register__row::after {
  content: "";
  position: absolute;
  left: 0; top: -1px;
  width: 0; height: 2px;
  background: var(--amber);
  transition: width 360ms cubic-bezier(0.65, 0, 0.35, 1);
}

.register__row:hover { background: var(--amber-dim); }
.register__row:hover::after { width: 100%; }

/* digital section rows use blue */
[data-section="digital"] .register__row::after { background: var(--blue); }
[data-section="digital"] .register__row:hover { background: var(--blue-dim); }

.register__index {
  align-self: start;
  padding-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--amber);
  font-feature-settings: "tnum" 1;
}

[data-section="digital"] .register__index { color: var(--blue); }

.register__head { min-width: 0; }

.register__tag {
  display: inline-block;
  margin-bottom: 0.55rem;
  padding: 0.18rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--void);
  background: var(--blue);
  font-weight: 700;
}

.register__head h3 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  max-width: 22ch;
  color: var(--ink);
}

.register__body {
  font-size: 0.98rem;
  line-height: 1.65;
  color: var(--ink-soft);
  max-width: 52ch;
}

/* =====================================================================
   CATALOG — applications (§04)
   ===================================================================== */
.catalog {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 2px solid var(--wire-mid);
  border-left: var(--hairline);
}

.catalog li {
  position: relative;
  padding: 1.2rem 1.2rem 1.2rem 2.6rem;
  font-family: var(--font-body);
  font-size: 0.96rem;
  line-height: 1.3;
  color: var(--ink-soft);
  border-bottom: var(--hairline);
  border-right: var(--hairline);
  transition: background 200ms ease, color 200ms ease;
}

.catalog li:hover {
  background: var(--blue-dim);
  color: var(--ink);
}

.catalog li::before {
  content: "+";
  position: absolute;
  left: 1rem; top: 1.2rem;
  color: var(--blue);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 1rem;
  line-height: 1;
}

/* =====================================================================
   PHASES — process (§05)
   ===================================================================== */
.phases {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 2px solid var(--wire-mid);
  position: relative;
}

.phase {
  position: relative;
  padding: 2.2rem 2rem 2.2rem 0;
  border-right: var(--hairline);
}

.phase:last-child { border-right: none; }
.phase + .phase { padding-left: 2rem; }

/* arrow connector */
.phase + .phase::before {
  content: "→";
  position: absolute;
  left: -0.65rem; top: 2.4rem;
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  opacity: 0.5;
}

.phase__num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 6vw, 5.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--amber);
  margin-bottom: 0.8rem;
  opacity: 0.2;
  font-feature-settings: "tnum" 1;
}

.phase h3 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 0.65rem;
  max-width: 16ch;
  color: var(--ink);
}

.phase p {
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.62;
  max-width: 32ch;
}

/* =====================================================================
   AUDIENCE — para quem é (§06)
   ===================================================================== */
.audience {
  border-top: 2px solid var(--wire-mid);
  counter-reset: aud;
}

.audience li {
  position: relative;
  padding: 1.1rem 0 1.1rem 3.5rem;
  border-bottom: var(--hairline);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--ink-soft);
  counter-increment: aud;
  transition: color 200ms ease, background 200ms ease;
}

.audience li:hover {
  color: var(--ink);
  background: var(--amber-dim);
  padding-left: 3.5rem;
}

.audience li::before {
  content: counter(aud, decimal-leading-zero);
  position: absolute;
  left: 0; top: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--amber);
  font-feature-settings: "tnum" 1;
}

/* =====================================================================
   MARKETS — atuação engenharia (§07)
   ===================================================================== */
.markets {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 2px solid var(--wire-mid);
}

.markets li {
  position: relative;
  padding: 2.5rem;
  border-right: var(--hairline);
  transition: background 240ms ease;
}

.markets li:last-child { border-right: none; }
.markets li:hover { background: var(--amber-dim); }

.markets li > span {
  display: block;
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--amber);
  font-feature-settings: "tnum" 1;
}

.markets h3 {
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 0.85rem;
  color: var(--ink);
}

.markets p {
  color: var(--ink-soft);
  font-size: 0.96rem;
  line-height: 1.65;
  max-width: 32ch;
}

/* =====================================================================
   ADVANTAGE — diferenciais inverse (§08)
   ===================================================================== */
.advantage { border-top: var(--hairline-mid); }

.advantage li {
  position: relative;
  padding: 1.1rem 0 1.1rem 2rem;
  border-bottom: var(--hairline);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.35;
  color: var(--ink-soft);
  transition: color 200ms ease;
}

.advantage li:hover { color: var(--ink); }

.advantage li::before {
  content: "⚡";
  position: absolute;
  left: 0; top: 1.15rem;
  color: var(--amber);
  font-size: 0.78rem;
}

/* =====================================================================
   LEADERSHIP (§09)
   ===================================================================== */
.leadership {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 4rem;
  align-items: start;
}

.leadership__media {
  margin: 0;
  position: relative;
  border: var(--hairline-strong);
  background: var(--surface);
  aspect-ratio: 4 / 5;
  overflow: hidden;
}

/* corner register marks */
.leadership__media::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 22px; height: 22px;
  border-top: 2px solid var(--amber);
  border-left: 2px solid var(--amber);
  z-index: 2;
  pointer-events: none;
}

.leadership__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.25) contrast(1.06);
  opacity: 0.88;
}

.leadership__media.is-placeholder img { display: none; }

.leadership__media.is-placeholder::before {
  content: "Eng. Jose Natal\AGonella Jr.";
  white-space: pre;
  position: absolute;
  inset: auto 1.4rem 1.6rem 1.4rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  text-transform: uppercase;
  line-height: 1.05;
  color: var(--ink);
  border: none;
  width: auto; height: auto;
}

.leadership__media figcaption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 0.52rem 0.85rem;
  background: rgba(8, 11, 16, 0.9);
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border-top: 1px solid var(--wire-amber);
}

.leadership__body { padding-top: 1rem; }

.leadership__name {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  line-height: 1;
  margin-bottom: 1.4rem;
  color: var(--ink);
}

.leadership__body p {
  margin-bottom: 1.1rem;
  color: var(--ink-soft);
  font-size: 1.02rem;
  line-height: 1.7;
  max-width: 52ch;
}
.leadership__body p:last-child { margin-bottom: 0; }

/* =====================================================================
   CONTACT (§10)
   ===================================================================== */
.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 4rem;
  align-items: start;
}

.contact__copy > p {
  margin-bottom: 2rem;
  color: var(--ink-soft);
  font-size: 1.02rem;
  line-height: 1.7;
  max-width: 52ch;
}

.contact__details { border-top: 2px solid var(--wire-mid); }

.contact__details li {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 1.5rem;
  padding: 0.9rem 0;
  border-bottom: var(--hairline);
  font-size: 1rem;
  line-height: 1.35;
}

.contact__details li > span:first-child {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
  align-self: start;
  padding-top: 0.2rem;
}

.contact__details a {
  color: var(--ink);
  transition: color 200ms ease;
}
.contact__details a:hover, .contact__details a:focus-visible { color: var(--amber); }

/* form */
.contact__form {
  border: var(--hairline-mid);
  background: var(--panel);
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  box-shadow: 0 24px 48px -20px rgba(0, 0, 0, 0.5);
  position: relative;
}

/* amber corner accent */
.contact__form::before {
  content: "";
  position: absolute;
  top: -1px; left: -1px;
  width: 24px; height: 24px;
  border-top: 2px solid var(--amber);
  border-left: 2px solid var(--amber);
  pointer-events: none;
}

.form__heading {
  margin: 0 0 0.4rem;
  padding-bottom: 0.7rem;
  border-bottom: var(--hairline-mid);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field > span {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.field input,
.field textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--surface);
  border: var(--hairline);
  color: var(--ink);
  resize: vertical;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--ink-faint);
  font-style: italic;
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--amber);
  box-shadow: 0 0 0 2px rgba(245, 166, 35, 0.12);
}

.field textarea { min-height: 6.5rem; }

.form__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.4rem;
}

.form__note {
  margin: 0.2rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  line-height: 1.55;
  color: var(--ink-faint);
}

/* =====================================================================
   COLOPHON (footer)
   ===================================================================== */
.colophon {
  background: var(--panel);
  color: var(--ink-soft);
  padding: 4.5rem 0 2rem;
  border-top: 2px solid var(--wire-mid);
  position: relative;
}

/* amber gradient top border */
.colophon::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--amber) 0%, rgba(245, 166, 35, 0.2) 40%, transparent 70%);
}

.colophon__inner {
  width: var(--shell);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1.1fr 1.1fr 1fr;
  gap: 3rem;
}

.colophon__band strong {
  display: block;
  margin-bottom: 0.7rem;
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.colophon__band strong span { color: var(--amber); }

.colophon__band p {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  line-height: 1.75;
  color: var(--ink-faint);
}

.colophon__band a {
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  transition: color 200ms ease, border-color 200ms ease;
}
.colophon__band a:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.colophon__nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem 1rem;
}

.colophon__nav a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  transition: color 200ms ease;
}
.colophon__nav a:hover { color: var(--amber); }

.colophon__note {
  width: var(--shell);
  margin: 3.5rem auto 0;
  padding-top: 1.2rem;
  border-top: var(--hairline);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* =====================================================================
   HERO SCHEMATIC — technical circuit diagram
   ===================================================================== */
.hero__schematic {
  border: var(--hairline-mid);
  background: var(--panel);
  box-shadow:
    0 0 0 1px var(--wire),
    0 24px 48px -20px rgba(0, 0, 0, 0.6),
    inset 0 0 80px rgba(245, 166, 35, 0.02);
  overflow: hidden;
}

.schematic {
  display: block;
  width: 100%;
  height: auto;
}

.schematic .s-stroke {
  stroke: var(--ink-soft);
  fill: none;
  stroke-width: 1;
}

.schematic .s-soft {
  stroke: var(--ink-faint);
  fill: none;
  stroke-width: 0.8;
  stroke-dasharray: 4 3;
}

.schematic .s-accent {
  stroke: var(--amber);
  fill: none;
  stroke-width: 1.5;
}

.schematic .s-dot {
  fill: var(--ink-soft);
}

.schematic .s-dot-accent {
  fill: var(--amber);
}

.schematic .s-text {
  font-family: "JetBrains Mono", monospace;
  font-size: 8px;
  fill: var(--ink-faint);
  letter-spacing: 0.08em;
}

/* =====================================================================
   PORTFOLIO — projetos executados (§ 02.A)
   ===================================================================== */
.portfolio {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 2px solid var(--wire-mid);
}

.case {
  display: flex;
  flex-direction: column;
  border-right: var(--hairline);
  border-bottom: var(--hairline);
  transition: background 220ms ease;
  text-decoration: none;
  color: inherit;
}

.case:nth-child(2n)   { border-right: none; }
.case:nth-child(3),
.case:nth-child(4)    { border-bottom: none; }

.case:hover { background: var(--amber-dim); }

.case__img {
  position: relative;
  border-bottom: var(--hairline);
  overflow: hidden;
  background: var(--surface);
}

.case__img svg {
  display: block;
  width: 100%;
  height: auto;
}

.case__tag {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  padding: 0.18rem 0.6rem;
  background: var(--amber);
  color: var(--void);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 700;
}

.case__body {
  padding: 1.5rem;
  flex: 1;
}

.case__loc {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.5rem;
}

.case__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  line-height: 1.05;
  color: var(--ink);
  margin: 0 0 0.6rem;
}

.case__desc {
  font-size: 0.9rem;
  line-height: 1.62;
  color: var(--ink-soft);
  margin: 0;
}

/* =====================================================================
   ANIMATION CONTRACT — IntersectionObserver reveal
   ===================================================================== */
.js .hero__lead,
.js .hero__schematic,
.js .chapter__head,
.js .register__row,
.js .catalog,
.js .phase,
.js .audience,
.js .markets li,
.js .advantage,
.js .leadership__media,
.js .leadership__body,
.js .contact__copy,
.js .contact__form,
.js .case {
  opacity: 0;
  transform: translateY(18px);
}

.js .hero__lead.is-visible,
.js .hero__schematic.is-visible,
.js .chapter__head.is-visible,
.js .register__row.is-visible,
.js .catalog.is-visible,
.js .phase.is-visible,
.js .audience.is-visible,
.js .markets li.is-visible,
.js .advantage.is-visible,
.js .leadership__media.is-visible,
.js .leadership__body.is-visible,
.js .contact__copy.is-visible,
.js .contact__form.is-visible,
.js .case.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 640ms ease, transform 640ms ease;
}

.js .case:nth-child(2).is-visible { transition-delay: 80ms; }
.js .case:nth-child(3).is-visible { transition-delay: 40ms; }
.js .case:nth-child(4).is-visible { transition-delay: 120ms; }

/* stagger register rows */
.js .register__row:nth-child(2).is-visible { transition-delay: 60ms; }
.js .register__row:nth-child(3).is-visible { transition-delay: 120ms; }
.js .register__row:nth-child(4).is-visible { transition-delay: 180ms; }
.js .register__row:nth-child(5).is-visible { transition-delay: 240ms; }

/* stagger phases */
.js .phase:nth-child(2).is-visible { transition-delay: 80ms; }
.js .phase:nth-child(3).is-visible { transition-delay: 160ms; }
.js .phase:nth-child(4).is-visible { transition-delay: 240ms; }

/* stagger markets */
.js .markets li:nth-child(2).is-visible { transition-delay: 80ms; }
.js .markets li:nth-child(3).is-visible { transition-delay: 160ms; }

/* =====================================================================
   RESPONSIVE
   ===================================================================== */
@media (max-width: 1080px) {
  .hero__layout {
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: stretch;
  }

  .two-col,
  .leadership,
  .contact {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .catalog,
  .markets {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .portfolio {
    grid-template-columns: 1fr;
  }

  .case:nth-child(2n)   { border-right: none; }
  .case:nth-child(3),
  .case:nth-child(4)    { border-bottom: var(--hairline); }
  .case:last-child      { border-bottom: none; }

  .phases {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;
  }

  .phase {
    border-bottom: var(--hairline);
    padding: 2rem;
  }

  .phase:nth-child(2n) { border-right: none; }
  .phase + .phase::before { display: none; }
  .phase + .phase { padding-left: 2rem; }

  .register__row {
    grid-template-columns: 4rem minmax(0, 1.1fr) minmax(0, 1.4fr);
    column-gap: 1.5rem;
  }

  .chapter__head {
    grid-template-columns: 5rem minmax(0, 1fr);
    column-gap: 1.5rem;
  }
}

@media (max-width: 720px) {
  :root {
    --shell: calc(100vw - 1.6rem);
    --shell-narrow: var(--shell);
  }

  body { font-size: 16px; }

  .masthead__inner {
    grid-template-columns: 1fr auto;
    padding: 0.8rem 0;
  }

  .masthead__brand { flex-wrap: wrap; gap: 0.4rem 0.7rem; }
  .masthead__brand strong { font-size: 1.3rem; }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    grid-column: 1 / -1;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-top: 0.4rem;
    margin-top: 0.5rem;
    border-top: var(--hairline);
    background: var(--panel);
  }

  .site-nav.is-open { display: flex; }

  .site-nav > a {
    padding: 0.85rem 0;
    border-bottom: var(--hairline);
  }

  .site-nav .nav__cta {
    margin-top: 0.5rem;
    padding: 0.75rem 1rem;
    text-align: center;
    justify-content: center;
  }

  .hero { padding: 3rem 0 4rem; }

  .hero::before {
    font-size: 0.58rem;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    margin-bottom: 2.4rem;
  }

  .hero h1 { font-size: clamp(2.8rem, 12vw, 5rem); }

  .crosshair--tl, .crosshair--tr { top: 0.8rem; }
  .crosshair--bl, .crosshair--br { bottom: 0.8rem; }

  .spec__row { grid-template-columns: 6rem 1fr; }
  .ledger dl > div { grid-template-columns: 7rem 1fr; }

  .chapter { padding: 4rem 0 4.5rem; }
  .chapter--inverse__inner { padding: 4rem 0; }

  .chapter__head {
    grid-template-columns: 1fr;
    column-gap: 0;
    row-gap: 0.5rem;
    margin-bottom: 2.4rem;
  }

  .chapter__index { grid-row: auto; max-width: 4rem; }

  .chapter__head .eyebrow,
  .chapter__head h2,
  .chapter__head .chapter__lede { grid-column: 1; }

  .register__row {
    grid-template-columns: 1fr;
    gap: 0.5rem;
    padding: 1.6rem 0;
  }

  .register__index { padding-top: 0; }

  .catalog { grid-template-columns: 1fr; }

  .phases {
    grid-template-columns: 1fr;
  }

  .phase { border-right: none; }

  .markets,
  .colophon__inner {
    grid-template-columns: 1fr;
  }

  .markets li { border-right: none; border-bottom: var(--hairline); }
  .markets li:last-child { border-bottom: none; }

  .colophon__inner { gap: 2.4rem; }
  .colophon__nav { grid-template-columns: repeat(2, 1fr); }

  .contact__details li {
    grid-template-columns: 6rem 1fr;
    gap: 1rem;
  }

  .contact__form { padding: 1.4rem; }
  .form__actions .btn { flex: 1 1 auto; }
}

/* =====================================================================
   prefers-reduced-motion
   ===================================================================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }

  .js .hero__lead,
  .js .hero__schematic,
  .js .chapter__head,
  .js .register__row,
  .js .catalog,
  .js .phase,
  .js .audience,
  .js .markets li,
  .js .advantage,
  .js .leadership__media,
  .js .leadership__body,
  .js .contact__copy,
  .js .contact__form,
  .js .case,
  .js .chapter__head h2 em,
  .js .hero h1 em {
    opacity: 1;
    transform: none;
  }
}