*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue:       #0066CC;
  --blue-light: #3399FF;
  --blue-pale:  #E8F2FF;
  --ink:        #0A0C10;
  --ink-2:      #111318;
  --ink-3:      #1A1D26;
  --steel:      #2C3040;
  --silver:     #8A92A6;
  --white:      #F4F5F8;
  --border-d:   rgba(255,255,255,.08);
  --border-l:   #DDE2EC;
  --body-bg:    #F2F4F8;
}

html { scroll-behavior: smooth; }
body {
  font-family: 'Instrument Sans', sans-serif;
  background: var(--ink);
  color: var(--white);
  overflow-x: hidden;
}

/* ── NAV ─────────────────────────────────────────── */
nav {
  position: fixed; top: 0; width: 100%; z-index: 300;
  height: 70px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 5vw;
  background: rgba(10,12,16,.9);
  backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--border-d);
}

.nav-brand { display: flex; align-items: center; gap: 14px; text-decoration: none; }
.nav-emblem {
  width: 40px; height: 40px;
  background: var(--blue);
  display: flex; align-items: center; justify-content: center;
  clip-path: polygon(0 0, 85% 0, 100% 15%, 100% 100%, 15% 100%, 0 85%);
}
.nav-emblem svg { width: 22px; height: 22px; fill: #fff; }
.nav-brand-text { line-height: 1.15; }
.nav-brand-name {
  display: block;
  font-family: 'Syne', sans-serif;
  font-size: 14px; font-weight: 800;
  letter-spacing: .5px; color: var(--white);
}
.nav-brand-sub {
  display: block;
  font-size: 10px; color: var(--silver);
  letter-spacing: 1.5px; text-transform: uppercase;
}

.nav-menu { display: flex; gap: 36px; list-style: none; }
.nav-menu a {
  text-decoration: none; color: var(--silver);
  font-size: 13px; font-weight: 500; letter-spacing: .3px;
  transition: color .2s;
}
.nav-menu a:hover { color: var(--white); }

.nav-cta {
  padding: 10px 26px;
  background: var(--blue); color: #fff;
  border: none; cursor: pointer;
  font-family: 'Syne', sans-serif;
  font-size: 12px; font-weight: 700; letter-spacing: 1px;
  text-transform: uppercase;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: background .2s;
  text-decoration: none; display: inline-block;
}
.nav-cta:hover { background: var(--blue-light); }

/* ── HERO ─────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  position: relative; overflow: hidden;
  display: flex; align-items: center;
  padding: 70px 5vw 0;
}

/* Animated background grid */
.hero-grid {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(var(--border-d) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-d) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 90% at 50% 50%, black 30%, transparent 100%);
}

/* Blue glow orb */
.hero-orb {
  position: absolute; top: 10%; right: -5%;
  width: 700px; height: 700px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,102,204,.25) 0%, transparent 70%);
  z-index: 0; pointer-events: none;
  animation: orbPulse 6s ease-in-out infinite alternate;
}
@keyframes orbPulse {
  from { transform: scale(1); opacity: .8; }
  to   { transform: scale(1.12); opacity: 1; }
}

/* Diagonal accent lines */
.hero-lines {
  position: absolute; right: 0; top: 0; bottom: 0; width: 55%;
  z-index: 0; overflow: hidden;
}
.hero-lines::before, .hero-lines::after {
  content: ''; position: absolute;
  top: -50%; left: 0; right: 0; bottom: -50%;
  border-left: 1px solid rgba(0,102,204,.2);
  transform-origin: center;
}
.hero-lines::before { transform: rotate(-15deg) translateX(40%); }
.hero-lines::after  { transform: rotate(-15deg) translateX(60%); border-color: rgba(0,102,204,.12); }

.hero-content {
  position: relative; z-index: 1;
  max-width: 800px;
  padding: 80px 0;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 7px 16px 7px 10px;
  border: 1px solid rgba(0,102,204,.4);
  background: rgba(0,102,204,.1);
  border-radius: 2px;
  font-size: 11px; font-weight: 600; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--blue-light);
  margin-bottom: 32px;
  animation: fadeUp .5s ease both;
}
.hero-badge-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--blue-light);
  box-shadow: 0 0 8px var(--blue-light);
  animation: blink 2s ease-in-out infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:.3} }

.hero-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(52px, 7.5vw, 116px);
  font-weight: 800;
  line-height: .92; letter-spacing: -2px;
  color: var(--white);
  margin-bottom: 36px;
  animation: fadeUp .55s ease .1s both;
}
.hero-title .accent { color: var(--blue); }
.hero-title .outline {
  -webkit-text-stroke: 1.5px rgba(255,255,255,.3);
  color: transparent;
}

.hero-desc {
  font-size: 18px; line-height: 1.7;
  color: var(--silver); font-weight: 300;
  max-width: 560px; margin-bottom: 48px;
  animation: fadeUp .55s ease .2s both;
}

.hero-actions {
  display: flex; gap: 16px; flex-wrap: wrap;
  animation: fadeUp .55s ease .3s both;
}
.btn-primary {
  padding: 15px 34px;
  background: var(--blue); color: #fff; border: none;
  font-family: 'Syne', sans-serif;
  font-size: 13px; font-weight: 700; letter-spacing: 1px;
  text-transform: uppercase; cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: background .2s, transform .15s;
  text-decoration: none; display: inline-block;
}
.btn-primary:hover { background: var(--blue-light); transform: translateY(-2px); }
.btn-secondary {
  padding: 15px 34px;
  background: transparent; color: var(--silver);
  border: 1px solid var(--border-d);
  font-family: 'Syne', sans-serif;
  font-size: 13px; font-weight: 700; letter-spacing: 1px;
  text-transform: uppercase; cursor: pointer;
  transition: border-color .2s, color .2s;
  text-decoration: none; display: inline-block;
}
.btn-secondary:hover { border-color: var(--blue); color: var(--blue-light); }

/* Stat bar */
.hero-statbar {
  position: absolute; bottom: 0; left: 0; right: 0;
  z-index: 1;
  display: grid; grid-template-columns: repeat(4,1fr);
  border-top: 1px solid var(--border-d);
}
.stat-cell {
  padding: 28px 5vw;
  border-right: 1px solid var(--border-d);
  animation: fadeUp .6s ease both;
}
.stat-cell:nth-child(1){animation-delay:.3s}
.stat-cell:nth-child(2){animation-delay:.4s}
.stat-cell:nth-child(3){animation-delay:.5s}
.stat-cell:nth-child(4){animation-delay:.6s; border-right:none}
.stat-num {
  font-family: 'Syne', sans-serif;
  font-size: 38px; font-weight: 800;
  color: var(--blue-light); line-height: 1;
}
.stat-lbl { font-size: 12px; color: var(--silver); margin-top: 5px; letter-spacing: .5px; }

/* ── ABOUT ────────────────────────────────────────── */
#sobre {
  background: var(--body-bg);
  padding: 120px 5vw;
}
.about-wrap {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: center;
}

.tag-line {
  display: flex; align-items: center; gap: 10px;
  font-size: 11px; font-weight: 600; letter-spacing: 2.5px;
  text-transform: uppercase; color: var(--blue);
  margin-bottom: 18px;
}
.tag-line::before { content: ''; width: 28px; height: 2px; background: var(--blue); }

.section-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(36px, 4vw, 60px);
  font-weight: 800; line-height: .95; letter-spacing: -1px;
  color: var(--ink); margin-bottom: 28px;
}

.about-body p {
  font-size: 16px; line-height: 1.8;
  color: #4A5068; font-weight: 300; margin-bottom: 18px;
}

.about-pillars {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 12px; margin-top: 36px;
}
.pillar {
  padding: 20px 18px;
  background: #fff;
  border: 1px solid var(--border-l);
  border-top: 3px solid var(--blue);
}
.pillar-ttl {
  font-family: 'Syne', sans-serif;
  font-size: 14px; font-weight: 700; color: var(--ink);
  margin-bottom: 6px;
}
.pillar-txt { font-size: 13px; color: #6A7090; line-height: 1.5; }

/* Visual / abstract steel illustration */
.about-visual {
  position: relative;
}
.steel-viz {
  width: 100%; aspect-ratio: 1;
  background: var(--ink-3);
  border: 1px solid rgba(0,102,204,.2);
  position: relative; overflow: hidden;
}
.steel-viz::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 80% 60% at 30% 70%, rgba(0,102,204,.2), transparent);
}
.viz-bars {
  position: absolute; inset: 0;
  display: flex; align-items: flex-end;
  padding: 24px; gap: 8px;
}
.vbar {
  flex: 1; border-radius: 2px 2px 0 0;
  background: linear-gradient(180deg, var(--blue-light), var(--blue));
  opacity: .8;
  animation: grow 1.2s ease both;
}
@keyframes grow { from{height:0 !important} }

.viz-label {
  position: absolute; bottom: 24px; left: 24px; right: 24px;
}
.viz-num {
  font-family: 'Syne', sans-serif;
  font-size: 64px; font-weight: 800;
  color: rgba(255,255,255,.06);
  line-height: 1; letter-spacing: -4px;
}

.about-badge-wrap {
  position: absolute; bottom: -20px; right: -20px;
  width: 130px; height: 130px;
  background: var(--blue);
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center;
}
.about-badge-num {
  font-family: 'Syne', sans-serif;
  font-size: 30px; font-weight: 800; color: #fff; line-height: 1;
}
.about-badge-lbl { font-size: 10px; color: rgba(255,255,255,.75); letter-spacing: .5px; margin-top: 2px; }

/* ── PRODUCTS ─────────────────────────────────────── */
#produtos {
  background: var(--ink-2);
  padding: 120px 5vw;
}
#produtos .section-title { color: var(--white); margin-bottom: 0; }
#produtos .tag-line { color: var(--blue-light); }
#produtos .tag-line::before { background: var(--blue-light); }

.prod-header {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: end; margin-bottom: 64px;
}
.prod-intro { font-size: 16px; color: var(--silver); line-height: 1.7; font-weight: 300; }

.prod-grid {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 1px; background: var(--border-d);
}
.prod-card {
  background: var(--ink-3); padding: 44px 36px;
  position: relative; overflow: hidden;
  transition: background .3s;
}
.prod-card:hover { background: #1f2335; }
.prod-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 2px; background: var(--blue);
  transform: scaleX(0); transform-origin: left;
  transition: transform .4s ease;
}
.prod-card:hover::before { transform: scaleX(1); }

.prod-num {
  font-family: 'Syne', sans-serif;
  font-size: 64px; font-weight: 800;
  color: var(--border-d);
  position: absolute; top: 16px; right: 20px;
  line-height: 1; transition: color .3s;
}
.prod-card:hover .prod-num { color: rgba(0,102,204,.12); }
.prod-icon {
  width: 50px; height: 50px; margin-bottom: 24px;
  border: 1px solid var(--border-d);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; color: var(--blue-light);
}
.prod-title {
  font-family: 'Syne', sans-serif;
  font-size: 20px; font-weight: 700; color: var(--white);
  margin-bottom: 12px; letter-spacing: -.2px;
}
.prod-text { font-size: 14px; color: var(--silver); line-height: 1.7; }

/* ── SUSTAINABILITY ───────────────────────────────── */
#sustentabilidade {
  background: var(--body-bg);
  padding: 120px 5vw;
}
.sus-grid {
  display: grid; grid-template-columns: 1fr 1fr 1fr;
  gap: 28px; margin-top: 64px;
}
.sus-card {
  padding: 40px 32px;
  background: #fff;
  border: 1px solid var(--border-l);
  position: relative;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.sus-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 48px rgba(0,40,100,.08);
  border-color: var(--blue);
}
.sus-icon { font-size: 38px; margin-bottom: 20px; display: block; }
.sus-title {
  font-family: 'Syne', sans-serif;
  font-size: 22px; font-weight: 700; color: var(--ink);
  margin-bottom: 12px;
}
.sus-text { font-size: 14px; color: #5A6080; line-height: 1.7; }
.sus-card-num {
  position: absolute; top: 20px; right: 24px;
  font-family: 'Syne', sans-serif;
  font-size: 11px; font-weight: 700; letter-spacing: 2px;
  color: var(--border-l); text-transform: uppercase;
}

/* ── NUMBERS BAND ─────────────────────────────────── */
.numbers-band {
  background: var(--blue);
  padding: 80px 5vw;
}
.numbers-grid {
  display: grid; grid-template-columns: repeat(4,1fr);
  gap: 1px; background: rgba(255,255,255,.15);
}
.num-cell {
  background: var(--blue); padding: 40px 32px; text-align: center;
}
.num-val {
  font-family: 'Syne', sans-serif;
  font-size: 52px; font-weight: 800; color: #fff; line-height: 1;
}
.num-lbl { font-size: 13px; color: rgba(255,255,255,.7); margin-top: 8px; letter-spacing: .5px; }

/* ── CONTACT ──────────────────────────────────────── */
#contato {
  background: var(--ink);
  padding: 120px 5vw;
  text-align: center; position: relative; overflow: hidden;
}
#contato::before {
  content: 'ARCELORMITTAL';
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  font-family: 'Syne', sans-serif;
  font-size: 14vw; font-weight: 800;
  color: rgba(255,255,255,.02); white-space: nowrap;
  pointer-events: none; letter-spacing: -4px;
}
#contato .section-title { color: var(--white); margin-bottom: 16px; position: relative; }
#contato .tag-line { justify-content: center; color: var(--blue-light); }
#contato .tag-line::before { background: var(--blue-light); }
.contact-sub {
  font-size: 17px; color: var(--silver); max-width: 480px;
  margin: 0 auto 44px; font-weight: 300; line-height: 1.7;
  position: relative;
}

/* ── FOOTER ───────────────────────────────────────── */
footer { background: var(--ink-2); border-top: 1px solid var(--border-d); }

.footer-main {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px; padding: 80px 5vw 64px;
  border-bottom: 1px solid var(--border-d);
}
.footer-desc { font-size: 14px; color: var(--silver); line-height: 1.7; margin-top: 16px; font-weight: 300; }
.footer-addr { margin-top: 24px; font-size: 13px; color: var(--silver); line-height: 1.9; }
.footer-addr strong {
  display: block; font-size: 10px; letter-spacing: 2px;
  text-transform: uppercase; color: var(--blue-light);
  margin-bottom: 6px; font-weight: 600;
}

.footer-col h4 {
  font-family: 'Syne', sans-serif;
  font-size: 11px; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; color: var(--silver);
  margin-bottom: 20px;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 11px; }
.footer-col ul li a {
  text-decoration: none; color: rgba(138,146,166,.6);
  font-size: 14px; transition: color .2s;
}
.footer-col ul li a:hover { color: var(--blue-light); }

.footer-bottom {
  padding: 24px 5vw;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
}
.footer-legal { font-size: 12px; color: rgba(138,146,166,.4); }
.footer-links { display: flex; gap: 24px; }
.footer-links a {
  font-size: 12px; color: rgba(138,146,166,.5);
  text-decoration: none; transition: color .2s;
}
.footer-links a:hover { color: var(--blue-light); }

/* ── ANIMATIONS ───────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── RESPONSIVE ───────────────────────────────────── */
@media (max-width: 1024px) {
  .prod-grid { grid-template-columns: repeat(2,1fr); }
  .sus-grid  { grid-template-columns: 1fr 1fr; }
  .numbers-grid { grid-template-columns: 1fr 1fr; }
  .footer-main { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .about-wrap, .prod-header { grid-template-columns: 1fr; }
  .about-pillars { grid-template-columns: 1fr; }
  .prod-grid { grid-template-columns: 1fr; }
  .sus-grid  { grid-template-columns: 1fr; }
  .hero-statbar { grid-template-columns: 1fr 1fr; }
  .nav-menu { display: none; }
}