/* ============================================
   SANCTUM SECURITY - LUXURY BRAND DESIGN SYSTEM
   Technology Should Empower People, Not Control Them
   ============================================ */

/* ============================================
   CSS CUSTOM PROPERTIES - DESIGN TOKENS
   ============================================ */

:root {
  /* Color Palette - Luxury Brand Colors */
  --color-primary: #D4936A;        /* Warm copper - Hermès-inspired */
  --color-accent: #7B9A7E;         /* Sage green - natural, grounded */
  --color-terminal: #5BAF7F;       /* Terminal green - technical heritage */
  --color-bg-dark: #1C1C1C;        /* Deep charcoal - sophisticated */
  --color-bg-card: #252525;        /* Card background */
  --color-text-primary: #F8F6F1;   /* Off-white - luxury paper */
  --color-text-secondary: #C4C1B8; /* Muted text */
  --color-border: #3A3A3A;         /* Subtle borders */

  /* Typography Scale */
  --font-serif: 'Georgia', 'Times New Roman', serif; /* Fallback for luxury serif */
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Font Sizes - Fluid Typography */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --text-2xl: clamp(2rem, 1.6rem + 2vw, 3rem);
  --text-3xl: clamp(2.5rem, 2rem + 2.5vw, 4rem);

  /* Spacing Scale */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-2xl: 8rem;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 800px;
  --container-wide: 1400px;

  /* Animation */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text-primary);
  background-color: var(--color-bg-dark);
  overflow-x: hidden;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  line-height: 1.2;
  font-weight: 400;
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--text-3xl);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--text-2xl);
  letter-spacing: -0.01em;
}

h3 {
  font-size: var(--text-xl);
}

h4 {
  font-size: var(--text-lg);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
}

p {
  margin-bottom: var(--space-sm);
  max-width: 65ch;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--color-accent);
}

strong {
  color: var(--color-primary);
  font-weight: 600;
}

em {
  font-style: italic;
  color: var(--color-text-secondary);
}

/* ============================================
   LAYOUT COMPONENTS
   ============================================ */

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

.container--narrow {
  max-width: var(--container-narrow);
}

.container--wide {
  max-width: var(--container-wide);
}

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

/* Generous whitespace - Hermès principle */
.section-spacing {
  padding: var(--space-2xl) 0;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(28, 28, 28, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--color-border);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  max-width: var(--container-wide);
  margin: 0 auto;
}

.logo {
  height: 40px;
  width: auto;
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
  transition: color var(--transition-base);
}

.nav-links a:hover {
  color: var(--color-primary);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding-top: var(--space-2xl);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(212, 147, 106, 0.05), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(123, 154, 126, 0.05), transparent 40%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-logo {
  width: 200px;
  height: auto;
  margin-bottom: var(--space-lg);
  filter: drop-shadow(0 4px 16px rgba(0, 0, 0, 0.3));
}

.hero-tagline {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  font-style: italic;
  max-width: 600px;
  margin: 0 auto var(--space-lg);
}

.hero-cta {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: all var(--transition-base);
  cursor: pointer;
}

.hero-cta:hover {
  background: var(--color-primary);
  color: var(--color-bg-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ============================================
   CARDS & CONTENT BLOCKS
   ============================================ */

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}

/* Three column layout for service offerings */
.service-grid--three-col {
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  max-width: var(--container-wide);
  margin-left: auto;
  margin-right: auto;
  gap: var(--space-xl);
}

.service-grid--three-col .card {
  padding: var(--space-md);
}

.service-grid--three-col .card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-xs);
}

.service-grid--three-col .card h4 {
  font-size: var(--text-sm);
  margin-bottom: var(--space-md);
}

.service-grid--three-col .card p {
  font-size: var(--text-sm);
  line-height: 1.6;
}

.service-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  transition: all var(--transition-slow);
}

.service-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.service-card h3 {
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.service-card p {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

/* ============================================
   SECTION HEADERS
   ============================================ */

.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-terminal);
  margin-bottom: var(--space-xs);
}

.section-title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  margin-bottom: var(--space-sm);
}

.section-description {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-xl) 0 var(--space-md);
  margin-top: var(--space-2xl);
}

.footer-content {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.footer-logo {
  height: 30px;
  width: auto;
  opacity: 0.6;
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.footer-copy {
  width: 100%;
  text-align: center;
  margin-top: var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   TERMINAL EFFECTS (Micro-interactions)
   ============================================ */

.terminal-cursor::after {
  content: '▋';
  color: var(--color-terminal);
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* Circuit board texture (subtle background) */
.circuit-pattern {
  background-image:
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px),
    linear-gradient(var(--color-border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.03;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
  nav {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .nav-links {
    gap: var(--space-md);
  }

  .hero-logo {
    width: 150px;
  }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-terminal { color: var(--color-terminal); }
.text-center { text-align: center; }
.mb-lg { margin-bottom: var(--space-lg); }
.mt-lg { margin-top: var(--space-lg); }