/* /portfolio/style.css */
:root {
  /* Color Palette */
  --bg-color: #10141a;
  --surface: #10141a;
  --surface-container-lowest: #0a0e14;
  --surface-container-low: #181c22;
  --surface-container: #1c2026;
  --surface-container-high: #262a31;
  --surface-container-highest: #31353c;

  --primary: #a2c9ff;
  --on-primary: #00315c;
  --primary-container: #58a6ff;
  --on-primary-container: #003a6b;
  --primary-glow: rgba(162, 201, 255, 0.4);

  --outline: #8b919d;
  --outline-variant: #414752;

  --text-primary: #dfe2eb; /* on-surface */
  --text-secondary: #c0c7d4; /* on-surface-variant */
  --text-muted: #8b919d; /* outline */
  
  --glass-bg: rgba(28, 32, 38, 0.7); /* surface-container with opacity */
}

/* Light Mode Overrides */
.light-mode {
  --bg-color: #f8f9fa;
  --surface: #ffffff;
  --surface-container-lowest: #f1f3f5;
  --surface-container-low: #e9ecef;
  --surface-container: #dee2e6;
  --surface-container-high: #ced4da;
  --surface-container-highest: #adb5bd;

  --primary: #0060aa;
  --on-primary: #ffffff;
  --primary-container: #d3e4ff;
  --on-primary-container: #001c38;
  --primary-glow: rgba(0, 96, 170, 0.3);

  --outline: #6c757d;
  --outline-variant: #ced4da;

  --text-primary: #212529;
  --text-secondary: #495057;
  --text-muted: #6c757d;
  
  --glass-bg: rgba(255, 255, 255, 0.7);
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  /* Technical Grid Background */
  background-image: radial-gradient(var(--outline-variant) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center;
  transition: background-color 0.3s ease, color 0.3s ease;
}

::selection {
  background-color: var(--primary-container);
  color: var(--on-primary-container);
}

/* Typography Utilities */
.font-mono {
  font-family: 'JetBrains Mono', monospace;
}

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

/* Base Layout & Elements */
a {
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
}

.max-w-4xl {
  max-width: 56rem;
  margin: 0 auto;
}

/* Header */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background-color: transparent;
  border-bottom: 1px solid rgba(162, 201, 255, 0.1);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
}

.brand:hover {
  text-shadow: 0 0 12px var(--primary-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
}

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

.theme-toggle {
  background: none;
  border: none;
  color: var(--primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.2s, transform 0.1s;
}

.theme-toggle:active {
  opacity: 0.8;
  transform: scale(0.95);
}

/* Main Content Area */
.main-content {
  min-height: 100vh;
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 6rem 1.5rem;
  text-align: center;
  position: relative;
}

/* Decorative SVG Grid Overlay */
.bg-grid-svg {
  position: absolute;
  inset: 0;
  z-index: -10;
  opacity: 0.05;
  pointer-events: none;
  width: 100%;
  height: 100%;
}

/* Circuit Lines Animation/Decoration */
.circuit-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.3;
}

.circuit-line-h {
  position: absolute;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  height: 1px;
  width: 100%;
  opacity: 0.3;
}
.circuit-line-v {
  position: absolute;
  background: linear-gradient(180deg, transparent, var(--outline-variant), transparent);
  width: 1px;
  height: 100%;
  opacity: 0.2;
}

.c-top-1 { top: 25%; left: 0; }
.c-top-2 { top: 75%; left: 0; }
.c-left-1 { left: 25%; top: 0; }
.c-right-1 { right: 25%; top: 0; }

/* Content Elements */
.status-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: var(--surface-container-highest);
  border: 1px solid var(--outline-variant);
  font-size: 0.625rem; /* 10px */
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
}

.title-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.title-line {
  height: 1px;
  width: 3rem;
  background-color: var(--outline-variant);
}

.main-title {
  font-size: 1.5rem;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.title-sub {
  font-size: 1rem;
  opacity: 0.6;
  text-transform: lowercase;
}

.bio-text {
  font-size: 1rem;
  color: rgba(223, 226, 235, 0.9);
  max-width: 42rem;
  margin: 0 auto;
  line-height: 1.75;
  margin-bottom: 2rem;
}

.light-mode .bio-text {
  color: var(--text-primary);
}

.highlight {
  color: var(--primary);
  font-weight: 800;
  background-color: rgba(162, 201, 255, 0.1);
  padding: 0 0.25rem;
  border-radius: 2px;
}

.bio-link {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.bio-link:hover {
  text-shadow: 0 0 8px var(--primary-glow);
}

.tech-tag {
  font-size: 0.75rem;
  border: 1px solid var(--outline-variant);
  padding: 0 0.25rem;
  background-color: var(--surface-container);
}

/* Call to Action */
.cta-container {
  margin-top: 4rem;
  margin-bottom: 2rem;
}

.cta-link {
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
}

.cta-link:hover {
  letter-spacing: 0.1em;
  text-shadow: 0 0 8px var(--primary-glow);
}

.cursor-blink {
  width: 0.5rem;
  height: 1rem;
  background-color: var(--primary);
  animation: blink 1s step-end infinite;
}

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

/* Footer */
.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background-color: transparent;
  border-top: 1px solid rgba(162, 201, 255, 0.1);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.socials {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.social-link {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.social-link:hover {
  color: var(--primary);
}

.social-text {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.footer-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.copyright {
  color: var(--text-muted);
  font-size: 0.625rem;
  text-transform: uppercase;
}

.contact-link {
  color: var(--primary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.contact-link:hover {
  text-decoration: underline;
  text-shadow: 0 0 8px var(--primary-glow);
}

/* Base Mobile Responsive */
@media (max-width: 480px) {
  .nav-links {
    gap: 1rem;
  }
  .brand {
    font-size: 1.1rem;
  }
  .footer {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
  }
  .socials {
    gap: 1rem;
  }
  .footer-meta {
    width: 100%;
    justify-content: center;
  }
  .main-content {
    padding-top: 5rem;
    padding-bottom: 7rem;
  }
}

/* Responsive adjust */
@media (min-width: 768px) {
  .main-title {
    font-size: 2rem;
  }
  .title-sub {
    font-size: 1.125rem;
  }
  .bio-text {
    font-size: 1.125rem;
  }
}