/* ==========================================================================
   Modern Minimalist Personal Site - brn5ite.com
   ========================================================================== */

/* CSS Reset & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #ffffff;
  --color-secondary: #f8f9fa;
  --color-text: #1a1a1a;
  --color-text-light: #6b7280;
  --color-accent: #374151;
  --color-border: #e5e7eb;
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --container-max-width: 1200px;
  --border-radius: 8px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-light);
}

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

a:hover {
  opacity: 0.7;
}

/* Layout Components */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-2xl) 0;
}

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

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  font-weight: 500;
  color: var(--color-text);
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  z-index: 100;
  transition: var(--transition);
}

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

.nav-brand {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: #4a5568;
  letter-spacing: -0.02em;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

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

.nav-links a {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: #374151;
  transition: var(--transition);
}

.nav-links a:hover {
  color: #1a1a1a;
}

/* Hero Section */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)),
              url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 800"><defs><filter id="noise"><feTurbulence baseFrequency="0.9" numOctaves="4" result="noise"/><feColorMatrix values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.1 0"/></filter></defs><rect width="100%" height="100%" fill="%23f5f5f5"/><path d="M0,400 Q300,200 600,400 T1200,400 L1200,800 L0,800 Z" fill="%23e5e5e5"/><path d="M0,500 Q400,300 800,500 T1200,500 L1200,800 L0,800 Z" fill="%23d5d5d5"/><rect width="100%" height="100%" filter="url(%23noise)"/></svg>') center/cover;
  color: var(--color-primary);
}

.hero-content {
  text-align: center;
  max-width: 600px;
  padding: 0 var(--spacing-md);
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 400;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.02em;
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.7);
  color: #ffffff;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  font-weight: 400;
  margin-bottom: var(--spacing-xl);
  opacity: 0.95;
  text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.6);
  color: #ffffff;
}

.btn-primary {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background: rgba(255, 255, 255, 0.15);
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--border-radius);
  color: #ffffff;
  font-weight: 600;
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: var(--transition);
  backdrop-filter: blur(10px);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.btn-primary:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 1);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

/* About Section */
.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-content p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

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

.skill-category h3 {
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.skill-category ul {
  list-style: none;
}

.skill-category li {
  padding: var(--spacing-xs) 0;
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
}

/* Interests Section */
.interests-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.interest-item {
  text-align: center;
  padding: var(--spacing-lg);
}

.interest-item h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

/* Contact Section */
.contact-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-content p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xl);
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.contact-link {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text-light);
  font-weight: 500;
  font-size: var(--font-size-sm);
  transition: var(--transition);
}

.contact-link:hover {
  border-color: var(--color-text);
  color: var(--color-text);
  transform: translateY(-2px);
}

/* Footer */
.footer {
  background-color: var(--color-text);
  color: var(--color-primary);
  text-align: center;
  padding: var(--spacing-lg) 0;
}

.footer p {
  color: rgba(0, 0, 0, 0.7);
  font-size: var(--font-size-sm);
}

/* Selection Styles */
::selection {
  background: var(--color-text);
  color: var(--color-primary);
}

::-moz-selection {
  background: var(--color-text);
  color: var(--color-primary);
}

/* ==========================================================================
   Responsive Design - Mobile First
   ========================================================================== */

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav {
    padding: var(--spacing-sm);
  }

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

  .nav-links a {
    font-size: var(--font-size-sm);
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: var(--font-size-lg);
  }

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

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

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

  .contact-links {
    flex-direction: column;
    align-items: center;
  }

  .contact-link {
    width: 200px;
    text-align: center;
  }
}

/* Tablet */
@media (min-width: 769px) and (max-width: 1024px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

/* Desktop */
@media (min-width: 1025px) {
  .hero-title {
    font-size: 4rem;
  }

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

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

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #1a1a1a;
    --color-secondary: #2d2d2d;
    --color-text: #ffffff;
    --color-text-light: #a1a1aa;
    --color-border: #374151;
  }

  .header {
    background: rgba(26, 26, 26, 0.95);
  }

  .nav-links a:hover {
    color: #d1d5db;
  }

  .hero {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)),
                url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 800"><defs><filter id="noise"><feTurbulence baseFrequency="0.9" numOctaves="4" result="noise"/><feColorMatrix values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.1 0"/></filter></defs><rect width="100%" height="100%" fill="%23333"/><path d="M0,400 Q300,200 600,400 T1200,400 L1200,800 L0,800 Z" fill="%23444"/><path d="M0,500 Q400,300 800,500 T1200,500 L1200,800 L0,800 Z" fill="%23555"/><rect width="100%" height="100%" filter="url(%23noise)"/></svg>') center/cover;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Focus Styles for Accessibility */
a:focus,
button:focus,
.btn-primary:focus {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
}

/* ==========================================================================
   Print styles.
   Inlined to avoid the additional HTTP request:
   https://www.phpied.com/delay-loading-your-print-css/
   ========================================================================== */

@media print {
  *,
  *::before,
  *::after {
    background: #fff !important;
    color: #000 !important;
    /* Black prints faster */
    box-shadow: none !important;
    text-shadow: none !important;
  }

  a,
  a:visited {
    text-decoration: underline;
  }

  a[href]::after {
    content: " (" attr(href) ")";
  }

  abbr[title]::after {
    content: " (" attr(title) ")";
  }

  /*
   * Don't show links that are fragment identifiers,
   * or use the `javascript:` pseudo protocol
   */
  a[href^="#"]::after,
  a[href^="javascript:"]::after {
    content: "";
  }

  pre {
    white-space: pre-wrap !important;
  }

  pre,
  blockquote {
    border: 1px solid #999;
    page-break-inside: avoid;
  }

  tr,
  img {
    page-break-inside: avoid;
  }

  p,
  h2,
  h3 {
    orphans: 3;
    widows: 3;
  }

  h2,
  h3 {
    page-break-after: avoid;
  }
}