/* Charchitron Consultancy (OPC) Private Limited — corporate site styles */

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f5f6f8;
  --color-text: #1c2430;
  --color-text-muted: #4a5568;
  --color-border: #e2e5ea;
  --color-primary: #1a2b4c;
  --color-primary-dark: #0f1a30;
  --color-accent: #2f5d9c;
  --max-width: 960px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 16px;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header / Nav */

header.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 24px;
}

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

.brand-name {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-primary);
  text-decoration: none;
}

.brand-name:hover {
  text-decoration: none;
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

nav.main-nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
}

nav.main-nav a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
}

nav.main-nav a.active {
  color: var(--color-accent);
  font-weight: 600;
}

/* Hero */

.hero {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding: 64px 0 56px;
}

.hero h1 {
  font-size: 2rem;
  margin: 0 0 14px;
  color: var(--color-primary);
}

.hero p.lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 700px;
  margin: 0;
}

/* Page header for interior pages */

.page-header {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.page-header h1 {
  margin: 0 0 8px;
  font-size: 1.75rem;
  color: var(--color-primary);
}

.page-header p {
  margin: 0;
  color: var(--color-text-muted);
}

/* Main content */

main {
  padding: 48px 0 64px;
}

main .container > section + section {
  margin-top: 40px;
}

h2 {
  font-size: 1.35rem;
  color: var(--color-primary);
  margin: 0 0 12px;
}

h3 {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin: 24px 0 8px;
}

p {
  margin: 0 0 14px;
  color: var(--color-text);
}

ul, ol {
  margin: 0 0 14px;
  padding-left: 22px;
}

li {
  margin-bottom: 6px;
}

.card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 28px 30px;
}

.fact-table {
  width: 100%;
  border-collapse: collapse;
  margin: 8px 0 20px;
}

.fact-table tr {
  border-bottom: 1px solid var(--color-border);
}

.fact-table tr:last-child {
  border-bottom: none;
}

.fact-table th, .fact-table td {
  text-align: left;
  padding: 10px 12px 10px 0;
  vertical-align: top;
  font-size: 0.95rem;
}

.fact-table th {
  width: 220px;
  color: var(--color-text-muted);
  font-weight: 600;
}

.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  padding: 11px 22px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
}

.btn:hover {
  background: var(--color-primary-dark);
  text-decoration: none;
}

.btn-secondary {
  display: inline-block;
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  padding: 10px 21px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  text-decoration: none;
}

.cta-row {
  display: flex;
  gap: 14px;
  margin-top: 20px;
  flex-wrap: wrap;
}

/* Footer */

footer.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  padding: 36px 0 28px;
  font-size: 0.87rem;
  color: var(--color-text-muted);
}

footer.site-footer .footer-legal {
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

footer.site-footer p {
  margin: 0 0 4px;
  color: var(--color-text-muted);
}

footer.site-footer .footer-links {
  margin-top: 16px;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

footer.site-footer .footer-links a {
  color: var(--color-text-muted);
}

footer.site-footer .footer-cols {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

footer.site-footer .footer-copy {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

/* Responsive */

@media (max-width: 640px) {
  .nav-wrap {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  nav.main-nav ul {
    gap: 18px;
    flex-wrap: wrap;
  }

  .hero {
    padding: 44px 0 40px;
  }

  .hero h1 {
    font-size: 1.6rem;
  }

  .footer-cols {
    flex-direction: column;
  }
}