/* ============================================================
   PETRO SLU — WEBSITE STYLESHEET
   Edit colours at the top under :root
   ============================================================ */

/* Self-hosted Helvetica Medium */
@font-face {
  font-family: 'Helvetica Medium';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/helvetica-medium.woff2') format('woff2');
}

:root {
  --black:   #0a0a0a;
  --white:   #f5f5f0;
  --mid:     #888;
  --border:  #d0d0c8;
  --accent:  #e6c300;   /* ← yellow accent */
  --font-display: 'Helvetica Medium', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-body:    'SF Mono', 'Menlo', 'Monaco', 'Consolas', 'Liberation Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--white);
  color: var(--black);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ── UTILITIES ─────────────────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ── NAV ────────────────────────────────────────────────────── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 40px; height: 80px;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s;
}
nav.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,.07); }

.nav-logo img { height: 28px; display: block; }

.nav-links {
  display: flex; gap: 36px; list-style: none;
}
.nav-links a {
  font-family: var(--font-display);
  font-size: 13px; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase;
  text-decoration: none; color: var(--black);
  position: relative; padding-bottom: 4px;
  transition: color .2s;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: 0; left: 0;
  width: 0; height: 2px; background: var(--accent);
  transition: width .25s ease;
}
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }
.nav-links a.active { color: var(--accent); }

.lang-switcher {
  display: flex; gap: 8px; align-items: center;
}
.lang-btn {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
  background: none; border: 1px solid var(--black);
  color: var(--black); cursor: pointer;
  padding: 4px 8px; transition: all .2s;
}
.lang-btn.active, .lang-btn:hover {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--black);
}

.nav-hamburger {
  display: none; background: none; border: none;
  cursor: pointer; flex-direction: column; gap: 5px; padding: 4px;
}
.nav-hamburger span {
  display: block; width: 24px; height: 2px; background: var(--black);
  transition: all .3s;
}

/* ── HERO ───────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex; align-items: flex-end;
  padding: 120px 40px 80px;
  background: var(--black);
  position: relative; overflow: hidden;
}

.hero-bg {
  position: absolute; inset: 0;
  background: var(--black);
}
/* If you add a hero image, it shows behind the overlay */
.hero-bg-img {
  position: absolute; inset: 0;
  object-fit: cover; width: 100%; height: 100%;
  opacity: .6;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(160deg, transparent 30%, rgba(10,10,10,.9) 100%);
}
/* Diagonal accent line */
.hero::before {
  content: '';
  position: absolute; top: 0; right: 120px;
  width: 2px; height: 100%;
  background: var(--accent);
  transform: skewX(-4deg);
  opacity: .7;
}

.hero-content { position: relative; z-index: 1; max-width: 900px; }

.hero-label {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 600;
  letter-spacing: .25em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 24px;
  display: flex; align-items: center; gap: 12px;
}
.hero-label::before {
  content: ''; display: block;
  width: 40px; height: 1px; background: var(--accent);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(56px, 8vw, 100px);
  font-weight: 900; line-height: .95;
  letter-spacing: -.03em;
  color: var(--white);
  margin-bottom: 32px;
}
.hero h1 em {
  font-style: normal; color: var(--accent);
}

.hero-sub {
  font-size: 13px; font-weight: 400;
  color: rgba(245,245,240,.65);
  max-width: 520px; margin-bottom: 48px;
  line-height: 1.9;
}

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-size: 13px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  text-decoration: none; padding: 14px 32px;
  border: 2px solid var(--white); color: var(--white);
  transition: all .25s; position: relative; overflow: hidden;
}
.btn::before {
  content: ''; position: absolute; inset: 0;
  background: var(--white); transform: translateX(-100%);
  transition: transform .25s ease;
}
.btn:hover::before { transform: translateX(0); }
.btn span { position: relative; z-index: 1; }
.btn:hover span { color: var(--black); }
.btn:hover { border-color: var(--white); }

.btn-accent {
  border-color: var(--accent); 
}
.btn-accent::before { background: var(--accent); }
.btn-accent span { color: var(--black); }
.btn-accent:hover span { color: var(--white); }

/* ── SECTIONS ───────────────────────────────────────────────── */
section { padding: 100px 40px; }

.section-label {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 600;
  letter-spacing: .25em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 16px;
  display: flex; align-items: center; gap: 12px;
}
.section-label::before {
  content: ''; display: block;
  width: 32px; height: 1px; background: var(--accent);
}

h2 {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 900; line-height: 1;
  letter-spacing: -.02em;
}

h3 {
  font-family: var(--font-display);
  font-size: 22px; font-weight: 900;
  letter-spacing: -.01em;
}

/* ── HOME: INTRO STRIP ───────────────────────────────────────── */
.intro {
  background: var(--white);
  padding: 80px 40px;
  border-bottom: 1px solid var(--border);
}
.intro-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px;
  align-items: center;
}
.intro-left h2 { margin-bottom: 24px; }
.intro-right p { color: #777; font-weight: 400; font-size: 13px; line-height: 1.9; }

/* ── HOME: SERVICES GRID ─────────────────────────────────────── */
.services-preview {
  background: var(--black); color: var(--white);
  padding: 100px 40px;
}
.services-grid {
  max-width: 1200px; margin: 60px auto 0;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px;
}
.service-card {
  padding: 48px 36px;
  border: 1px solid rgba(255,255,255,.08);
  transition: background .25s;
  position: relative; overflow: hidden;
}
.service-card::before {
  content: ''; position: absolute; top: 0; left: 0;
  width: 3px; height: 0; background: var(--accent);
  transition: height .3s ease;
}
.service-card:hover { background: rgba(255,255,255,.04); }
.service-card:hover::before { height: 100%; }
.service-num {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 700;
  letter-spacing: .2em; color: var(--accent);
  margin-bottom: 20px;
}
.service-card h3 { color: var(--white); margin-bottom: 14px; font-size: 20px; }
.service-card p { color: rgba(245,245,240,.35); font-size: 13px; font-weight: 400; line-height: 1.9; }

/* ── HOME: IMAGE SECTION ─────────────────────────────────────── */
.image-feature {
  padding: 0; overflow: hidden;
  display: grid; grid-template-columns: 1fr 1fr; min-height: 500px;
}
.image-feature-img {
  background: #1a1a1a;
  min-height: 500px;
  overflow: hidden;
}
.image-feature-img img {
  width: 100%; height: 100%; object-fit: cover;
  min-height: 500px;
}
.image-feature-text {
  padding: 80px 60px; background: var(--black); color: var(--white);
  display: flex; flex-direction: column; justify-content: center;
}
.image-feature-text .section-label { margin-bottom: 24px; }
.image-feature-text h2 { color: var(--white); margin-bottom: 24px; }
.image-feature-text p { color: rgba(245,245,240,.35); font-weight: 400; font-size: 13px; margin-bottom: 36px; line-height: 1.9; }

/* ── ABOUT PAGE ──────────────────────────────────────────────── */
.page-hero {
  padding: 180px 40px 80px;
  background: var(--black); color: var(--white);
  position: relative; overflow: hidden;
}
.page-hero::after {
  content: ''; position: absolute; bottom: -1px; left: 0; right: 0;
  height: 80px;
  background: var(--white);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}
.page-hero-inner { max-width: 1200px; margin: 0 auto; }
.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(48px, 7vw, 88px);
  font-weight: 900; line-height: .95; letter-spacing: -.03em;
}
.page-hero p {
  font-size: 13px; font-weight: 400; color: rgba(245,245,240,.4);
  max-width: 600px; margin-top: 24px; line-height: 1.9;
}

.about-content { max-width: 1200px; margin: 0 auto; }
.about-grid {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 80px;
  align-items: start; margin-bottom: 80px;
}
.about-img-wrap {
  aspect-ratio: 4/5;
  background: #e0e0d8;
  overflow: hidden; position: relative;
}
.about-img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.about-img-wrap .img-placeholder {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 12px;
  color: #999; font-family: var(--font-display);
  font-size: 12px; letter-spacing: .2em; text-transform: uppercase;
}
.about-img-wrap .img-placeholder svg { opacity: .3; }
.about-text h2 { margin-bottom: 24px; }
.about-text p { color: #777; margin-bottom: 18px; font-weight: 400; font-size: 13px; line-height: 1.9; }
.about-text strong { font-weight: 500; color: var(--black); }

.stats-row {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0; border-top: 1px solid var(--border);
  border-left: 1px solid var(--border);
  margin-top: 80px;
}
.stat-item {
  padding: 40px 32px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stat-num {
  font-family: var(--font-display);
  font-size: 48px; font-weight: 900; line-height: 1;
  letter-spacing: -.02em; color: var(--black);
}
.stat-label {
  font-size: 13px; font-weight: 400; color: var(--mid); margin-top: 8px;
}

/* ── SERVICES PAGE ───────────────────────────────────────────── */
.services-list { max-width: 1200px; margin: 0 auto; }
.service-row {
  display: grid; grid-template-columns: 80px 1fr 1fr; gap: 48px;
  padding: 56px 0; border-bottom: 1px solid var(--border);
  align-items: start;
}
.service-row:first-child { border-top: 1px solid var(--border); }
.service-row-num {
  font-family: var(--font-display);
  font-size: 13px; font-weight: 700; letter-spacing: .15em;
  color: var(--accent); padding-top: 6px;
}
.service-row h3 { font-size: 28px; line-height: 1.1; }
.service-row p { color: #777; font-weight: 400; font-size: 13px; line-height: 1.9; }
.service-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.tag {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase;
  padding: 5px 12px; border: 1px solid var(--border); color: var(--mid);
}

/* ── CONTACT PAGE ────────────────────────────────────────────── */
.contact-section { max-width: 1200px; margin: 0 auto; }
.contact-grid {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 80px;
}
.contact-info h2 { margin-bottom: 32px; }
.contact-detail { margin-bottom: 32px; }
.contact-detail-label {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 700; letter-spacing: .2em; text-transform: uppercase;
  color: var(--mid); margin-bottom: 8px;
}
.contact-detail a, .contact-detail p {
  font-size: 15px; font-weight: 400; color: var(--black); text-decoration: none;
}
.contact-detail a:hover { color: var(--accent); }

.contact-form { display: flex; flex-direction: column; gap: 24px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 700; letter-spacing: .15em; text-transform: uppercase;
  color: var(--mid);
}
.form-group input,
.form-group textarea,
.form-group select {
  background: transparent; border: none;
  border-bottom: 1px solid var(--border);
  padding: 12px 0; font-family: var(--font-body);
  font-size: 16px; color: var(--black);
  outline: none; transition: border-color .2s;
  width: 100%;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { border-color: var(--black); }
.form-group textarea { resize: vertical; min-height: 120px; }

.btn-submit {
  font-family: var(--font-display);
  font-size: 13px; font-weight: 700; letter-spacing: .15em; text-transform: uppercase;
  padding: 16px 40px; background: var(--black); color: var(--white);
  border: 2px solid var(--black); cursor: pointer;
  transition: all .25s; align-self: flex-start;
}
.btn-submit:hover { background: transparent; color: var(--black); }

/* ── FOOTER ──────────────────────────────────────────────────── */
footer {
  background: var(--black); color: rgba(245,245,240,.5);
  padding: 60px 40px;
}
.footer-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; flex-direction: column; align-items: center;
  text-align: center; gap: 32px;
}
.footer-logo img { height: 28px; opacity: .7; }
.footer-copy { font-size: 13px; font-weight: 300; }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; justify-content: center; }
.footer-links a {
  font-family: var(--font-display);
  font-size: 11px; letter-spacing: .15em; text-transform: uppercase;
  color: rgba(245,245,240,.4); text-decoration: none; transition: color .2s;
}
.footer-links a:hover { color: var(--white); }

/* ── LANGUAGE VISIBILITY ─────────────────────────────────────── */
[data-lang]:not(.lang-btn) { display: none; }
[data-lang].visible { display: block; }
/* For inline/flex elements */
[data-lang].visible-flex { display: flex; }

/* ── RESPONSIVE ──────────────────────────────────────────────── */
@media (max-width: 900px) {
  nav { padding: 0 20px; }
  .nav-links { display: none; flex-direction: column; gap: 0;
    position: fixed; top: 80px; left: 0; right: 0;
    background: var(--white); padding: 20px 0;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-links li a { display: block; padding: 14px 24px; }
  .nav-hamburger { display: flex; }

  .hero { padding: 140px 24px 64px; }
  section { padding: 64px 24px; }
  .intro-inner { grid-template-columns: 1fr; gap: 40px; }
  .services-grid { grid-template-columns: 1fr; }
  .image-feature { grid-template-columns: 1fr; }
  .image-feature-img { min-height: 300px; }
  .image-feature-text { padding: 48px 32px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .service-row { grid-template-columns: 1fr; gap: 16px; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .who-grid { grid-template-columns: 1fr !important; }
  .footer-inner { flex-direction: column; align-items: center; }
  .page-hero { padding: 140px 24px 60px; }
}

@media (max-width: 480px) {
  .stats-row { grid-template-columns: 1fr; }
  .stat-num { font-size: 40px; }
}