:root {
  --navy-dark: #040a16;
  --navy: #081830;
  --slate: #1c2f45;
  --cyan: #00adb5;
  --sand: #dcbf7a;
  --silver: #e9eef4;
  --white: #ffffff;
  --text-dark: #0b1b2f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--navy-dark);
  color: var(--white);
}

.site-header {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 6vw;
  background: rgba(4, 10, 22, 0.92);
  backdrop-filter: blur(8px);
  z-index: 20;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand {
  display: flex;
  gap: 0.8rem;
  align-items: center;
}

.logo {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.06);
  padding: 6px;
}

.logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 8px;
}

.language-switcher {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--sand);
  position: relative;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.lang-dropdown {
  position: relative;
}

.lang-dropdown button {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  background: #fff;
  border: 1px solid rgba(8, 24, 48, 0.2);
  border-radius: 999px;
  padding: 0.35rem 1rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-dark);
  min-width: 150px;
}

.lang-dropdown button:focus {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.lang-dropdown .lang-label {
  color: var(--text-dark);
}

.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 0.4rem);
  background: #fff;
  border: 1px solid rgba(8, 24, 48, 0.15);
  border-radius: 16px;
  padding: 0.4rem;
  list-style: none;
  margin: 0;
  min-width: 180px;
  box-shadow: 0 20px 40px rgba(2, 8, 24, 0.2);
  display: none;
  z-index: 30;
}

.lang-dropdown[data-open="true"] .lang-menu {
  display: block;
}

.lang-menu li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.7rem;
  border-radius: 12px;
  cursor: pointer;
  color: var(--text-dark);
  font-weight: 500;
}

.lang-menu li:hover {
  background: rgba(8, 24, 48, 0.06);
}

.flag {
  width: 20px;
  height: 14px;
  border-radius: 3px;
  background-size: cover;
  background-position: center;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.1);
}

.flag-en { background-image: url('assets/flag-en.png'); }
.flag-zh { background-image: url('assets/flag-zh.png'); }
.flag-ms { background-image: url('assets/flag-ms.png'); }
.flag-fr { background-image: url('assets/flag-fr.png'); }
.flag-de { background-image: url('assets/flag-de.png'); }
.flag-ru { background-image: url('assets/flag-ru.png'); }

.language-switcher select {
  display: none;
}

.nav a {
  color: var(--white);
  text-decoration: none;
  margin-left: 1rem;
  font-size: 0.95rem;
}

.nav .cta {
  border: 1px solid var(--cyan);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
}

.hero {
  min-height: 80vh;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  padding: 4rem 6vw 3rem;
  background: var(--navy-dark);
}

.hero h1 {
  font-size: clamp(2.4rem, 3.6vw, 3.4rem);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--sand);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 1.5rem 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.4rem;
  border-radius: 999px;
  background: var(--cyan);
  color: var(--navy-dark);
  font-weight: 600;
  text-decoration: none;
}

.link {
  color: var(--sand);
  text-decoration: none;
}

.metrics {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.metric {
  font-size: 1.6rem;
  font-weight: 600;
}

.hero-media {
  border-radius: 20px;
  background-image: linear-gradient(120deg, rgba(0, 0, 0, 0.35), rgba(8, 24, 48, 0.8)), url('assets/hero-tanker.jpg');
  background-size: cover;
  background-position: center;
  min-height: 380px;
}

.media-card {
  border-radius: 20px;
  min-height: 320px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
}

.image-sulphur {
  background-image: linear-gradient(180deg, rgba(8, 24, 48, 0.45), rgba(8, 24, 48, 0.6)), url('assets/supply-terminal.jpg');
}

.image-sts {
  background-image: linear-gradient(180deg, rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.55)), url('assets/operations-sts.jpg');
}

.image-bitumen {
  background-image: linear-gradient(180deg, rgba(8, 24, 48, 0.35), rgba(8, 24, 48, 0.55)), url('assets/products-road.jpg');
}

.image-markets {
  background-image: linear-gradient(180deg, rgba(4, 10, 22, 0.4), rgba(4, 10, 22, 0.7)), url('assets/markets-port.jpg');
}

.image-finance {
  background-image: linear-gradient(180deg, rgba(8, 24, 48, 0.35), rgba(8, 24, 48, 0.65)), url('assets/finance-singapore.jpg');
}

.image-risk {
  background-image: linear-gradient(180deg, rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.65)), url('assets/risk-refinery.jpg');
}

.image-growth {
  background-image: linear-gradient(180deg, rgba(8, 24, 48, 0.35), rgba(8, 24, 48, 0.6)), url('assets/growth-logistics.jpg');
}

.section {
  padding: 4rem 6vw;
  background: var(--silver);
  color: var(--text-dark);
}

.section.dark {
  background: var(--slate);
  color: var(--white);
}

.section h2 {
  margin-top: 0.5rem;
  margin-bottom: 1rem;
  font-size: clamp(1.8rem, 2.5vw, 2.3rem);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
}

.card {
  border-radius: 20px;
  padding: 1.8rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.section:not(.dark) .card {
  background: var(--white);
  border: 1px solid rgba(8, 24, 48, 0.08);
  color: var(--text-dark);
}

.checklist {
  list-style: none;
  padding: 0;
}

.checklist li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.4rem;
}

.checklist li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--cyan);
}

.pill-grid,
.pill-grid li {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.pill-grid span,
.pill-grid li {
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  font-size: 0.92rem;
}

.section:not(.dark) .pill-grid span,
.section:not(.dark) .pill-grid li {
  background: rgba(8, 24, 48, 0.09);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.product-grid article {
  background: var(--navy);
  color: var(--white);
  border-radius: 18px;
  padding: 1.4rem;
}

.section.contact {
  background: var(--navy);
  color: var(--white);
}

.contact-form {
  display: grid;
  gap: 1rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.85rem;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(0, 0, 0, 0.2);
  color: var(--white);
}

.contact-form button {
  border: none;
  border-radius: 999px;
  padding: 0.9rem;
  background: var(--cyan);
  color: var(--navy-dark);
  font-weight: 600;
}

.site-footer {
  padding: 1.5rem 6vw;
  text-align: center;
  background: #030713;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
}

@media (max-width: 900px) {
  .site-header {
    flex-direction: column;
  }
  .nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.6rem;
  }
  .nav a {
    margin: 0;
  }
}