/* 
  Vajradium - Global Style System v2 (IBM/Minimalist Aesthetic)
  Colors: Pure White, Off-White, Deep Charcoal, Accents
  Aesthetic: Light, Ultra-Modern, Sophisticated, Highly Legible, Finesse
  Typography: IBM Plex Sans & IBM Plex Mono
*/

/* --- CSS Variables & Theming --- */
:root {
  /* Core Colors */
  --pure-white: #FFFFFF;
  --off-white: #f8f9fa;
  /* Very subtle gray for section differentiation */
  --border-light: #e0e0e0;

  /* Text Colors */
  --text-main: #161616;
  /* Deep charcoal for high contrast, but not #000 */
  --text-muted: #525252;
  --text-light: #f4f4f4;

  /* Accents */
  --accent-blue: #0f62fe;
  /* IBM Blue */
  --deep-blue: #051c2c;
  /* For rare dark footers/headers */

  /* Typography */
  --font-primary: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  /* Spacing (Generous) */
  --spacing-xs: 0.5rem;
  /* 8px */
  --spacing-sm: 1rem;
  /* 16px */
  --spacing-md: 2.5rem;
  /* 40px */
  --spacing-lg: 5rem;
  /* 80px */
  --spacing-xl: 10rem;
  /* 160px */

  /* Geometry (Absolute Sharp Edges, Thin lines) */
  --radius: 0px;
  --border-thin: 1px solid var(--border-light);

  /* Layout */
  --max-width: 1200px;

  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
}

/* --- Resets & Base --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  color: var(--text-main);
  background-color: var(--pure-white);
  line-height: 1.6;
  font-weight: 300;
  /* Lighter base weight for elegance */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Typography --- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-primary);
  font-weight: 300;
  /* Finesse in headings */
  line-height: 1.1;
  color: var(--text-main);
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: clamp(3rem, 6vw, 5rem);
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  letter-spacing: -0.02em;
}

h3 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 400;
}

h4 {
  font-size: 1.25rem;
  font-weight: 500;
}

p {
  margin-bottom: var(--spacing-md);
  font-size: 1.125rem;
  font-weight: 300;
  line-height: 1.7;
}

.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: var(--spacing-sm);
  display: block;
}

.text-muted {
  color: var(--text-muted);
}

.text-center {
  text-align: center;
}

/* --- Layout Utilities --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.section {
  padding: var(--spacing-lg) 0;
}

.section-xl {
  padding: var(--spacing-xl) 0;
}

.bg-white {
  background-color: var(--pure-white);
}

.bg-off-white {
  background-color: var(--off-white);
}

.bg-dark {
  background-color: var(--deep-blue);
  color: var(--pure-white);
}

.bg-dark h2,
.bg-dark h3,
.bg-dark p {
  color: var(--pure-white);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }

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

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* --- Components --- */

/* Thin Buttons (Sharp Corners) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  font-family: var(--font-primary);
  font-weight: 400;
  text-decoration: none;
  border-radius: var(--radius);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--accent-blue);
  color: #FFFFFF !important;
}

.btn-primary:hover {
  background-color: var(--deep-blue);
  color: #FFFFFF !important;
}

.btn-outline {
  background-color: transparent;
  color: var(--text-main);
  border-color: var(--text-main);
}

.btn-outline:hover {
  background-color: var(--text-main);
  color: var(--pure-white);
}

/* Trust Bar / Certifications */
.trust-bar {
  background-color: var(--off-white);
  color: var(--text-muted);
  padding: 0.5rem 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-bottom: var(--border-thin);
}

.trust-item {
  display: inline-block;
  margin: 0 1rem;
}

/* Navigation - Ultra Minimal */
.navbar {
  background-color: var(--pure-white);
  border-bottom: var(--border-thin);
  padding: 0.5rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: var(--transition);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-main);
  text-decoration: none;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 2.5rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo {
  height: 64px;
  width: auto;
  display: block;
}

.brand-text {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: 0.1em;
  padding-top: 5px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 400;
  font-size: 0.95rem;
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-blue);
}

/* Mobile Menu Toggle */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-main);
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--pure-white);
    padding: 2rem;
    border-bottom: var(--border-thin);
    box-shadow: 0 10px 10px rgba(0,0,0,0.05);
    align-items: flex-start;
  }
  
  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: block;
    margin-left: auto;
  }
  
  .brand-logo {
    height: 48px;
  }
  
  .brand-text {
    font-size: 1rem;
  }
  
  .section {
    padding: var(--spacing-md) 0;
  }
  
  h1 {
    font-size: 2.5rem;
  }
  
  .hero-content {
    text-align: left;
  }
  
  .navbar {
    padding: 0.5rem 0;
  }
}

/* Minimalist Cards */
.card {
  background-color: transparent;
  padding: var(--spacing-md);
  border-top: var(--border-thin);
  /* Top line logic only for clean grid */
  border-left: var(--border-thin);
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

/* Add right border to last item in row, bottom border to last row */
.grid-4 .card:nth-child(4n) {
  border-right: var(--border-thin);
}

.grid-4 .card:nth-last-child(-n+4) {
  border-bottom: var(--border-thin);
}

.card:hover {
  background-color: var(--off-white);
}

.card-icon {
  font-size: 2.5rem;
  color: var(--pure-white);
  background-color: var(--accent-blue);
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  margin-bottom: var(--spacing-md);
  transition: var(--transition);
}

.card:hover .card-icon {
  background-color: var(--deep-blue);
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-xs);
}

.card-body {
  flex-grow: 1;
  font-size: 1rem;
}

.card-link {
  margin-top: var(--spacing-sm);
  display: inline-flex;
  align-items: center;
  font-weight: 500;
  color: var(--accent-blue);
  text-decoration: none;
  transition: var(--transition);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
}

.card-link i {
  margin-left: 0.5rem;
  transition: transform 0.3s ease;
}

.card-link:hover i {
  transform: translateX(5px);
}

/* Typography Focused Hero Section */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  position: relative;
  background-color: var(--pure-white);
  color: var(--text-main);
  border-bottom: var(--border-thin);
}

.hero-content {
  max-width: 900px;
}

/* Image framing (sharp edges, thin borders) */
.img-fluid {
  max-width: 100%;
  height: auto;
  display: block;
}

.content-image {
  border: var(--border-thin);
  filter: grayscale(20%);
  /* Slightly mute images for corporate feel */
  transition: var(--transition);
}

.content-image:hover {
  filter: grayscale(0%);
}

/* Detail Section formatting */
.detail-block {
  border-left: 1px solid var(--accent-blue);
  padding-left: 1.5rem;
  margin-bottom: 2rem;
}

.detail-block h4 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

/* Footer Minimal */
.footer {
  background-color: var(--off-white);
  color: var(--text-main);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  border-top: var(--border-thin);
  font-size: 0.9rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
  .footer-top {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-col h4 {
  color: var(--text-main);
  margin-bottom: var(--spacing-sm);
  font-size: 1.25rem;
}

.footer-col p {
  color: var(--text-muted);
  max-width: 400px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent-blue);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-md);
  border-top: var(--border-thin);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
}

/* Content specific util */
.large-p {
  font-size: 1.5rem;
  font-weight: 300;
  line-height: 1.5;
  color: var(--text-muted);
}

/* Dropdown Menu styling */
.navbar .dropdown {
  position: relative;
}

.navbar .dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--pure-white);
  border: var(--border-thin);
  border-top: 3px solid var(--accent-blue);
  min-width: 220px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  z-index: 100;
  padding: 0.5rem 0;
}

@media (min-width: 769px) {
  .navbar .dropdown:hover .dropdown-menu {
    display: block;
  }
}

.navbar .dropdown-menu a {
  display: block;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--off-white);
}

.navbar .dropdown-menu a:last-child {
  border-bottom: none;
}

.navbar .dropdown-menu a:hover {
  background-color: var(--off-white);
  color: var(--accent-blue);
  padding-left: 1.75rem;
}

@media (max-width: 768px) {
  .navbar .dropdown-menu {
    position: static;
    box-shadow: none;
    border: none;
    border-left: 2px solid var(--accent-blue);
    padding: 0;
    margin-top: 1rem;
    margin-left: 1rem;
    min-width: auto;
  }

  .navbar .dropdown.active .dropdown-menu {
    display: block;
  }
}