/* ==========================================================
   LX Infrastructure — inspired by the Birla Estates aesthetic
   Deep navy + warm gold + generous whitespace
   ========================================================== */

:root {
  --navy: #0f2137;
  --navy-2: #16304d;
  --gold: #c9a24b;
  --gold-soft: #e5cf9a;
  --ink: #22303e;
  --muted: #5c6b7a;
  --paper: #faf8f4;
  --white: #ffffff;
  --line: #e6e0d4;
  --shadow: 0 18px 45px rgba(15, 33, 55, 0.14);
  --radius: 6px;
  --font-display: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --font-body: "Jost", "Segoe UI", Helvetica, Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }

.container { width: min(1180px, 92%); margin: 0 auto; }
.section { padding: clamp(64px, 9vw, 120px) 0; }

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; color: var(--navy); line-height: 1.12; }
h1 { font-size: clamp(2.4rem, 6.5vw, 4.6rem); }
h2 { font-size: clamp(1.9rem, 4.2vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2.4vw, 1.55rem); }

.eyebrow {
  font-size: 0.78rem; letter-spacing: 0.32em; text-transform: uppercase;
  color: var(--gold); font-weight: 500; margin-bottom: 14px;
}
.section-head { max-width: 720px; margin: 0 auto clamp(36px, 6vw, 64px); text-align: center; }
.section-sub { color: var(--muted); margin-top: 16px; font-size: 1.02rem; }
.section-head.light h2 { color: var(--white); }
.section-head.light .section-sub { color: rgba(255,255,255,0.72); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 15px 36px; font-size: 0.82rem; font-weight: 500;
  letter-spacing: 0.22em; text-transform: uppercase; border-radius: 2px;
  border: 1px solid transparent; cursor: pointer;
  transition: all 0.35s ease;
}
.btn-gold { background: var(--gold); color: var(--navy); border-color: var(--gold); }
.btn-gold:hover { background: transparent; color: var(--gold); }
.btn-outline { border-color: rgba(255,255,255,0.65); color: var(--white); }
.btn-outline:hover { background: var(--white); color: var(--navy); }
.btn-navy { background: var(--navy); color: var(--white); border-color: var(--navy); }
.btn-navy:hover { background: transparent; color: var(--navy); }
.btn-block { width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  padding: 22px 0; transition: all 0.4s ease;
}
.site-header.scrolled {
  background: rgba(15, 33, 55, 0.96); backdrop-filter: blur(10px);
  padding: 12px 0; box-shadow: 0 6px 24px rgba(0,0,0,0.18);
}
.header-inner {
  width: min(1280px, 94%); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 44px; height: 44px; flex: 0 0 44px; display: grid; place-items: center;
  background: var(--gold); color: var(--navy);
  font-family: var(--font-display); font-weight: 700; font-size: 1.3rem;
  border-radius: 4px; letter-spacing: 0.02em;
}
.brand-text {
  font-family: var(--font-display); font-size: 1.35rem; font-weight: 600;
  color: var(--white); letter-spacing: 0.04em; white-space: nowrap;
}
.brand-text em { font-style: normal; color: var(--gold-soft); font-weight: 400; }

.main-nav { display: flex; align-items: center; gap: clamp(18px, 2.6vw, 36px); }
.main-nav a {
  color: rgba(255,255,255,0.85); font-size: 0.8rem; font-weight: 400;
  letter-spacing: 0.18em; text-transform: uppercase; position: relative;
  padding: 6px 0; transition: color 0.3s;
}
.main-nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 0;
  background: var(--gold); transition: width 0.3s ease;
}
.main-nav a:hover, .main-nav a.active { color: var(--white); }
.main-nav a:hover::after, .main-nav a.active::after { width: 100%; }
.main-nav .nav-cta {
  border: 1px solid var(--gold); color: var(--gold); padding: 10px 22px; border-radius: 2px;
}
.main-nav .nav-cta::after { display: none; }
.main-nav .nav-cta:hover { background: var(--gold); color: var(--navy); }

.nav-toggle {
  display: none; background: none; border: 0; cursor: pointer;
  width: 42px; height: 42px; flex-direction: column; justify-content: center;
  align-items: center; gap: 6px; z-index: 110;
}
.nav-toggle span {
  display: block; width: 26px; height: 2px; background: var(--white);
  transition: all 0.35s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero, .page-hero { position: relative; display: flex; align-items: center; justify-content: center; text-align: center; }
.hero { min-height: 100svh; }
.page-hero { min-height: 62svh; padding-top: 90px; }
.hero-bg { position: absolute; inset: 0; overflow: hidden; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; animation: heroZoom 18s ease-out forwards; }
@keyframes heroZoom { from { transform: scale(1.12); } to { transform: scale(1); } }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(15,33,55,0.72) 0%, rgba(15,33,55,0.45) 45%, rgba(15,33,55,0.82) 100%);
}
.hero-content, .page-hero-content { position: relative; z-index: 2; width: min(900px, 92%); padding: 120px 0 80px; }
.hero-kicker {
  color: var(--gold-soft); letter-spacing: 0.34em; text-transform: uppercase;
  font-size: 0.74rem; font-weight: 500; margin-bottom: 22px;
}
.hero h1, .page-hero h1 { color: var(--white); }
.hero h1 span, .page-hero h1 span { color: var(--gold-soft); font-style: italic; font-weight: 500; }
.hero-sub {
  color: rgba(255,255,255,0.82); max-width: 640px; margin: 26px auto 38px;
  font-size: clamp(0.98rem, 1.6vw, 1.12rem);
}
.hero-actions { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }
.hero-scroll {
  position: absolute; bottom: 34px; left: 50%; transform: translateX(-50%);
  width: 26px; height: 44px; border: 1px solid rgba(255,255,255,0.55); border-radius: 14px;
  z-index: 2;
}
.hero-scroll span {
  position: absolute; top: 8px; left: 50%; width: 3px; height: 9px; margin-left: -1.5px;
  background: var(--gold); border-radius: 2px; animation: scrollDot 1.8s ease-in-out infinite;
}
@keyframes scrollDot { 0% {opacity:0; transform:translateY(0);} 40% {opacity:1;} 100% {opacity:0; transform:translateY(14px);} }

/* ---------- Stats ---------- */
.stats { background: var(--navy); padding: clamp(44px, 6vw, 70px) 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; text-align: center; }
.stat-num, .stat-plus {
  font-family: var(--font-display); font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  font-weight: 600; color: var(--gold);
}
.stat p { color: rgba(255,255,255,0.75); font-size: 0.86rem; letter-spacing: 0.14em; text-transform: uppercase; margin-top: 6px; }

/* ---------- Expertise ---------- */
.expertise-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3vw, 34px); }
.exp-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.exp-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.exp-img { overflow: hidden; aspect-ratio: 16 / 10; }
.exp-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s ease; }
.exp-card:hover .exp-img img { transform: scale(1.07); }
.exp-body { padding: 26px 26px 30px; }
.exp-body h3 { margin-bottom: 10px; }
.exp-body p { color: var(--muted); font-size: 0.95rem; }

/* ---------- Projects ---------- */
.projects { background: var(--white); }
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); grid-auto-rows: 250px; gap: clamp(16px, 2.4vw, 26px); }
.project-card {
  position: relative; overflow: hidden; border-radius: var(--radius); display: block;
}
.project-card.large { grid-column: span 2; grid-row: span 2; }
.project-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s ease; }
.project-card:hover img { transform: scale(1.06); }
.project-card::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(15,33,55,0) 35%, rgba(15,33,55,0.88) 100%);
}
.project-info { position: absolute; left: 24px; right: 24px; bottom: 20px; z-index: 2; color: var(--white); }
.project-info h3 { color: var(--white); margin: 8px 0 2px; }
.project-info p { font-size: 0.86rem; color: rgba(255,255,255,0.78); }
.tag {
  display: inline-block; font-size: 0.66rem; letter-spacing: 0.24em; text-transform: uppercase;
  background: rgba(201,162,75,0.92); color: var(--navy); padding: 5px 12px; border-radius: 2px; font-weight: 500;
}

/* ---------- Legacy ---------- */
.legacy-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 6vw, 80px); align-items: center; }
.legacy-img { position: relative; }
.legacy-img > img { border-radius: var(--radius); box-shadow: var(--shadow); aspect-ratio: 4 / 5; object-fit: cover; width: 100%; }
.legacy-badge {
  position: absolute; right: -18px; bottom: 40px; background: var(--gold); color: var(--navy);
  padding: 22px 26px; border-radius: 4px; display: flex; align-items: center; gap: 14px;
  box-shadow: var(--shadow);
}
.legacy-badge strong { font-family: var(--font-display); font-size: 2.4rem; font-weight: 700; line-height: 1; }
.legacy-badge span { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 500; line-height: 1.5; }
.legacy-text h2 { margin-bottom: 22px; }
.legacy-text p { color: var(--muted); margin-bottom: 18px; }
.legacy-text .btn { margin-top: 10px; }

/* ---------- Philosophy ---------- */
.philosophy {
  background:
    linear-gradient(rgba(15,33,55,0.93), rgba(15,33,55,0.95)),
    url("https://images.unsplash.com/photo-1486718448742-163732cd1544?w=1600&q=60&auto=format&fit=crop") center/cover fixed;
}
.pillars { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(22px, 3vw, 36px); }
.pillar { border-top: 1px solid rgba(201,162,75,0.4); padding-top: 26px; }
.pillar-num { font-family: var(--font-display); font-size: 1.1rem; color: var(--gold); letter-spacing: 0.1em; }
.pillar h3 { color: var(--white); margin: 12px 0 10px; }
.pillar p { color: rgba(255,255,255,0.68); font-size: 0.93rem; }

/* ---------- Testimonials ---------- */
.testi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3vw, 32px); }
.testi {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 30px; position: relative;
}
.testi::before {
  content: "\201C"; font-family: var(--font-display); font-size: 4.4rem; color: var(--gold);
  position: absolute; top: -6px; left: 22px; opacity: 0.55; line-height: 1;
}
.testi p { color: var(--ink); font-size: 0.98rem; margin-bottom: 18px; padding-top: 18px; }
.testi footer { color: var(--gold); font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase; font-weight: 500; }

/* ---------- Contact ---------- */
.contact { background: var(--white); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(36px, 6vw, 80px); align-items: start; }
.contact-text h2 { margin-bottom: 18px; }
.contact-text > p { color: var(--muted); margin-bottom: 28px; }
.contact-list { list-style: none; }
.contact-list li { padding: 14px 0; border-bottom: 1px solid var(--line); color: var(--muted); }
.contact-list strong {
  display: block; font-size: 0.72rem; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--navy); font-weight: 500; margin-bottom: 2px;
}
.contact-form {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(26px, 4vw, 44px);
}
.contact-form label {
  display: block; font-size: 0.72rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--navy); font-weight: 500; margin-bottom: 18px;
}
.contact-form input, .contact-form select, .contact-form textarea {
  width: 100%; margin-top: 8px; padding: 13px 15px; font-family: var(--font-body);
  font-size: 0.96rem; color: var(--ink); background: var(--white);
  border: 1px solid var(--line); border-radius: 3px; outline: none;
  transition: border-color 0.3s;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-color: var(--gold); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-note { margin-top: 14px; font-size: 0.9rem; color: var(--gold); text-align: center; letter-spacing: 0.04em; }

/* ---------- Directors ---------- */
.directors { background: var(--white); }
.directors-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(24px, 3.5vw, 44px); }
.director-card {
  text-align: center; background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 44px 30px 38px; transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.director-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.director-photo {
  width: 148px; height: 148px; margin: 0 auto 24px; border-radius: 50%;
  overflow: hidden; position: relative; border: 3px solid var(--gold);
  background: var(--navy); display: grid; place-items: center;
}
.director-photo img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; z-index: 2; }
.director-initials {
  font-family: var(--font-display); font-size: 2.6rem; font-weight: 600; color: var(--gold);
  letter-spacing: 0.06em;
}
.director-card h3 { margin-bottom: 4px; }
.director-role {
  color: var(--gold); font-size: 0.74rem; letter-spacing: 0.28em; text-transform: uppercase;
  font-weight: 500; margin-bottom: 16px;
}
.director-bio { color: var(--muted); font-size: 0.93rem; }
.helper-note {
  text-align: center; margin-top: 34px; color: var(--muted); font-size: 0.85rem;
}
.helper-note code { background: var(--line); padding: 2px 7px; border-radius: 3px; font-size: 0.8rem; }
.helper-note.light { color: rgba(255,255,255,0.6); }
.helper-note.light code { background: rgba(255,255,255,0.14); color: var(--gold-soft); }

/* ---------- Licenses ---------- */
.licenses { background: var(--navy); }
.licenses-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3vw, 32px); }
.license-card { margin: 0; }
.license-img {
  aspect-ratio: 3 / 4; background: var(--navy-2); border: 1px solid rgba(201,162,75,0.35);
  border-radius: var(--radius); overflow: hidden; display: grid; place-items: center;
  position: relative; transition: transform 0.4s ease, border-color 0.4s ease;
}
.license-card:hover .license-img { transform: translateY(-6px); border-color: var(--gold); }
.license-img img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; z-index: 2; cursor: zoom-in; }
.license-placeholder {
  color: rgba(255,255,255,0.45); font-size: 0.82rem; letter-spacing: 0.22em;
  text-transform: uppercase; text-align: center; line-height: 2;
}
.license-card figcaption {
  margin-top: 14px; text-align: center; color: rgba(255,255,255,0.85);
  font-size: 0.82rem; letter-spacing: 0.18em; text-transform: uppercase; font-weight: 400;
}
.license-card.pending .license-img { border-style: dashed; }

/* License lightbox */
.lightbox {
  position: fixed; inset: 0; z-index: 200; background: rgba(15,33,55,0.94);
  display: grid; place-items: center; padding: 4vw; cursor: zoom-out;
  opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
}
.lightbox.open { opacity: 1; pointer-events: auto; }
.lightbox img { max-width: 100%; max-height: 92svh; border-radius: 4px; box-shadow: 0 30px 80px rgba(0,0,0,0.5); }

/* ---------- CTA strip ---------- */
.cta-strip { background: var(--gold); padding: clamp(40px, 6vw, 64px) 0; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 26px; flex-wrap: wrap; }
.cta-inner h2 { color: var(--navy); }
.cta-strip .btn-gold { background: var(--navy); color: var(--white); border-color: var(--navy); }
.cta-strip .btn-gold:hover { background: transparent; color: var(--navy); }

/* ---------- Footer ---------- */
.site-footer { background: #0a1830; color: rgba(255,255,255,0.72); }
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: clamp(30px, 4vw, 60px);
  padding: clamp(50px, 7vw, 80px) 0 40px;
}
.footer-brand p { margin-top: 18px; font-size: 0.92rem; line-height: 1.9; }
.footer-col h4 {
  color: var(--gold); font-family: var(--font-body); font-weight: 500; font-size: 0.78rem;
  letter-spacing: 0.26em; text-transform: uppercase; margin-bottom: 18px;
}
.footer-col a { display: block; padding: 6px 0; font-size: 0.94rem; transition: color 0.3s; }
.footer-col a:hover { color: var(--gold-soft); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1); padding: 22px 0; text-align: center;
  font-size: 0.82rem; color: rgba(255,255,255,0.45);
}

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-bg img { animation: none; }
  html { scroll-behavior: auto; }
}

/* ==========================================================
   RESPONSIVE — tablet & mobile
   ========================================================== */
@media (max-width: 1024px) {
  .expertise-grid, .testi-grid, .licenses-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 230px; }
  .project-card.large { grid-column: span 2; grid-row: span 1; }
  .directors-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .philosophy { background-attachment: scroll; }
  .pillars { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed; inset: 0; background: rgba(15, 33, 55, 0.98);
    flex-direction: column; justify-content: center; gap: 30px;
    transform: translateX(100%); transition: transform 0.45s cubic-bezier(0.7, 0, 0.3, 1);
    z-index: 105;
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav a { font-size: 1rem; }
  body.nav-locked { overflow: hidden; }

  .legacy-grid, .contact-grid { grid-template-columns: 1fr; }
  .legacy-img { max-width: 480px; }
  .legacy-badge { right: 10px; }
  .directors-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 34px 16px; }
  .cta-inner { justify-content: center; text-align: center; }
}

@media (max-width: 560px) {
  .expertise-grid, .testi-grid, .projects-grid { grid-template-columns: 1fr; }
  .licenses-grid { grid-template-columns: repeat(2, 1fr); }
  .project-card.large { grid-column: span 1; }
  .projects-grid { grid-auto-rows: 240px; }
  .pillars { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .footer-grid { grid-template-columns: 1fr; text-align: center; }
  .brand-text { font-size: 1.15rem; }
  .hero-actions .btn { width: 100%; text-align: center; }
  .btn { padding: 14px 28px; }
}