/* ============================================================
   LARSA INTERNATIONAL PETROLEUM — Corporate Website Stylesheet
   Dark corporate theme
   Palette:
     Page background   #0A1626 (deep navy, near black)
     Section alternate #0E1D31
     Surface (cards)   #13243A
     Gold              #B49A68  /  bright gold #D9C28F
     Headings          #FFFFFF  /  body text #C9D2DC
   ============================================================ */

:root {
  --bg: #0A1626;
  --bg-alt: #0E1D31;
  --surface: #13243A;
  --surface-deep: #071120;
  --navy: #102238;
  --white: #FFFFFF;
  --gold: #B49A68;
  --gold-bright: #D9C28F;
  --gold-soft: rgba(180, 154, 104, 0.4);
  --text: #C9D2DC;
  --text-muted: #93A1B1;
  --border: rgba(255, 255, 255, 0.09);

  --font-serif: "Playfair Display", "Georgia", "Times New Roman", serif;
  --font-sans: "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;

  --container: 1140px;
  --radius: 10px;
  --radius-img: 14px;
  --shadow-soft: 0 12px 34px rgba(0, 0, 0, 0.35);
  --transition: 0.3s ease;
}

/* ---------- Reset & base ---------- */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--gold-bright);
  text-decoration: none;
  transition: color var(--transition);
}

ul {
  list-style: none;
}

/* Accessibility */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--gold);
  color: var(--navy);
  padding: 0.6rem 1.2rem;
  z-index: 2000;
}

.skip-link:focus {
  left: 0;
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* ---------- Typography ---------- */

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--white);
  line-height: 1.25;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.3rem); }
h3 { font-size: 1.25rem; }

p {
  margin-bottom: 1rem;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1rem;
}

.lead {
  font-size: 1.12rem;
  color: var(--text-muted);
}

/* ---------- Layout helpers ---------- */

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5.5rem 0;
}

.section--grey {
  background-color: var(--bg-alt);
}

.section--navy {
  background-color: var(--bg-alt);
}

.section-head {
  max-width: 720px;
  margin-bottom: 3rem;
}

.section-head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.gold-rule {
  width: 56px;
  height: 2px;
  background: var(--gold);
  border: 0;
  margin: 1.2rem 0 1.5rem;
}

.section-head--center .gold-rule {
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.95rem 2.2rem;
  border: 1px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

.btn--primary {
  background-color: var(--gold);
  color: #0A1626;
  border-color: var(--gold);
}

.btn--primary:hover {
  background-color: var(--gold-bright);
  border-color: var(--gold-bright);
  color: #0A1626;
}

.btn--gold {
  background-color: transparent;
  color: var(--gold-bright);
  border-color: var(--gold);
}

.btn--gold:hover {
  background-color: var(--gold);
  color: #0A1626;
}

.btn--light {
  background-color: var(--white);
  color: var(--navy);
  border-color: var(--white);
}

.btn--light:hover {
  background-color: transparent;
  color: var(--white);
}

/* ---------- Header & navigation ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(7, 17, 32, 0.97);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}

.site-header.is-scrolled {
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.45);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  gap: 2rem;
}

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

.brand-mark {
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.26em;
  color: var(--gold-bright);
}

.brand-sub {
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.33em;
  text-transform: uppercase;
  color: var(--gold);
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 2.2rem;
}

.site-nav a {
  position: relative;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
  padding: 0.4rem 0;
}

.site-nav a:hover {
  color: var(--white);
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background-color: var(--gold);
  transition: width var(--transition);
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  width: 100%;
}

.site-nav a.is-active {
  color: var(--white);
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background-color: var(--gold-bright);
  margin: 6px 0;
  transition: transform var(--transition), opacity var(--transition);
}

/* ---------- Hero (home) ---------- */

.hero {
  position: relative;
  background-color: var(--bg);
  color: var(--white);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(7, 17, 32, 0.88) 0%, rgba(7, 17, 32, 0.55) 60%, rgba(7, 17, 32, 0.35) 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  padding: 9rem 0 10rem;
  max-width: 680px;
}

.hero h1 {
  color: var(--white);
  margin-bottom: 1.4rem;
}

.hero .eyebrow {
  margin-bottom: 1.4rem;
  color: var(--gold-bright);
}

.hero-lead {
  font-size: 1.1rem;
  color: var(--text);
  margin-bottom: 2.4rem;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ---------- Page header (subpages) ---------- */

.page-header {
  position: relative;
  background-color: var(--bg-alt);
  color: var(--white);
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.page-header--photo {
  background-size: cover;
  background-position: center;
}

.page-header-inner {
  position: relative;
  padding: 5rem 0 4.5rem;
  max-width: 760px;
}

.page-header h1 {
  color: var(--white);
  margin-bottom: 1rem;
}

.page-header p {
  color: var(--text);
  font-size: 1.08rem;
  margin-bottom: 0;
}

/* ---------- Cards & grids ---------- */

.grid {
  display: grid;
  gap: 1.75rem;
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-top: 2px solid var(--gold);
  border-radius: var(--radius);
  padding: 2.2rem 1.9rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-soft);
  transform: translateY(-3px);
}

.card h3 {
  margin-bottom: 0.7rem;
}

.card p {
  color: var(--text-muted);
  font-size: 0.96rem;
  margin-bottom: 0;
}

.card-icon {
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--gold-soft);
  border-radius: 50%;
  margin-bottom: 1.4rem;
  color: var(--gold-bright);
}

/* ---------- Split section (text + figure) ---------- */

.split {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.split-figure {
  border: 1px solid var(--border);
  border-radius: var(--radius-img);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.split-figure svg,
.split-figure img {
  width: 100%;
  height: auto;
}

/* ---------- Product rows ---------- */

.product-row {
  display: grid;
  grid-template-columns: 72px 1fr 180px;
  gap: 1.8rem;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
  padding: 2rem 2.2rem;
  margin-bottom: 1.4rem;
  transition: box-shadow var(--transition);
}

.product-row:hover {
  box-shadow: var(--shadow-soft);
}

.product-row h3 {
  margin-bottom: 0.5rem;
}

.product-row p {
  color: var(--text-muted);
  margin-bottom: 0;
  font-size: 0.98rem;
}

.product-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--gold-bright);
}

.product-thumb {
  width: 180px;
  height: 126px;
  object-fit: cover;
  border-radius: var(--radius-img);
  border: 1px solid var(--border);
}

/* ---------- Figure band (wide in-page photo) ---------- */

.figure-band {
  border-radius: var(--radius-img);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  margin-top: 2.6rem;
}

.figure-band img {
  width: 100%;
  height: 340px;
  object-fit: cover;
}

/* ---------- Commercial relationships ---------- */

.partner-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.75rem;
  max-width: 880px;
  margin: 0 auto;
}

.partner-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 2px solid var(--gold);
  border-radius: var(--radius);
  padding: 2.2rem 1.9rem;
  text-align: center;
}

.partner-card .partner-name {
  font-family: var(--font-serif);
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gold-bright);
  display: block;
}

.partner-card .partner-full {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold);
  margin-top: 0.5rem;
}

.partner-card .partner-country {
  display: block;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

/* ---------- Notice / disclaimer band ---------- */

.notice {
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  border-left: 3px solid var(--gold);
  padding: 1.6rem 2rem;
  border-radius: var(--radius);
}

.notice p {
  margin-bottom: 0;
  color: var(--text-muted);
  font-size: 0.93rem;
}

.notice strong {
  color: var(--text);
}

/* ---------- CTA band ---------- */

.cta-band {
  background-color: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  color: var(--white);
  text-align: center;
  padding: 5rem 0;
}

.cta-band h2 {
  color: var(--white);
  margin-bottom: 1rem;
}

.cta-band p {
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 2.2rem;
}

/* ---------- Contact page ---------- */

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 4rem;
  align-items: start;
}

.contact-info h3 {
  margin-bottom: 1.2rem;
}

.contact-item {
  display: flex;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
}

.contact-item:last-child {
  border-bottom: 0;
}

.contact-item-icon {
  color: var(--gold);
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.contact-item strong {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 0.15rem;
}

.contact-item span,
.contact-item a {
  color: var(--text-muted);
  font-size: 0.97rem;
}

.contact-item a:hover {
  color: var(--gold-bright);
}

.placeholder-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold-bright);
  border: 1px dashed var(--gold-soft);
  border-radius: 4px;
  padding: 0.1rem 0.55rem;
}

/* Form */

.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 2px solid var(--gold);
  border-radius: var(--radius);
  padding: 2.5rem;
  box-shadow: var(--shadow-soft);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.3rem;
}

.form-group {
  margin-bottom: 1.3rem;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 0.45rem;
}

.form-group .required {
  color: var(--gold-bright);
}

.form-group input,
.form-group textarea {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 0.97rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.8rem 1rem;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--gold);
}

.form-group input.has-error,
.form-group textarea.has-error {
  border-color: #C96A52;
}

.error-message {
  display: none;
  font-size: 0.82rem;
  color: #C96A52;
  margin-top: 0.35rem;
}

.error-message.is-visible {
  display: block;
}

.form-status {
  display: none;
  margin-top: 1.4rem;
  padding: 1.1rem 1.4rem;
  border-radius: var(--radius);
  font-size: 0.93rem;
  line-height: 1.6;
}

.form-status.is-visible {
  display: block;
}

.form-status--info {
  background: var(--bg-alt);
  border-left: 3px solid var(--gold);
  color: var(--text);
}

.form-preview-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 1.2rem;
  margin-bottom: 0;
}

.form-preview-note strong {
  color: var(--text);
}

/* ---------- Footer ---------- */

.site-footer {
  background-color: var(--surface-deep);
  border-top: 1px solid var(--border);
  color: var(--text);
  padding: 4.5rem 0 0;
}

.footer-brand .brand-name {
  color: var(--gold-bright);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.2fr;
  gap: 3rem;
  padding-bottom: 3rem;
}

.footer-brand p {
  font-size: 0.93rem;
  margin-top: 1.2rem;
  max-width: 360px;
  color: var(--text-muted);
}

.footer-heading {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.3rem;
}

.site-footer ul li {
  margin-bottom: 0.65rem;
}

.site-footer a {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.site-footer a:hover {
  color: var(--gold-bright);
}

.footer-contact li {
  font-size: 0.95rem;
  margin-bottom: 0.65rem;
  color: var(--text-muted);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 1.6rem 0;
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: #6E7E8F;
}

/* ---------- Reveal animation ---------- */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 960px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .split,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-inner { padding: 6.5rem 0 7.5rem; }
}

@media (max-width: 760px) {
  .section { padding: 4rem 0; }

  .grid--2,
  .grid--3 { grid-template-columns: 1fr; }

  .form-row { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: 2.2rem; }

  .product-row {
    grid-template-columns: 1fr;
    gap: 1.1rem;
  }

  .product-thumb {
    width: 100%;
    height: 170px;
  }

  .partner-cards {
    grid-template-columns: 1fr;
  }

  .figure-band img {
    height: 220px;
  }

  /* Mobile navigation */
  .nav-toggle { display: block; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface-deep);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.5);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }

  .site-nav.is-open {
    max-height: 360px;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 0.8rem 1.5rem 1.4rem;
  }

  .site-nav li {
    width: 100%;
  }

  .site-nav a {
    display: block;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--border);
  }

  .site-nav li:last-child a {
    border-bottom: 0;
  }

  .nav-toggle.is-open span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .nav-toggle.is-open span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle.is-open span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .brand-name { font-size: 1.1rem; letter-spacing: 0.2em; }
  .brand-sub { font-size: 0.52rem; letter-spacing: 0.26em; }
}