/* ========================================
   ULTRA-MINIMAL INFRASTRUCTURE-TECH DESIGN
   ======================================== */

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

:root {
  /* Muted Color Palette */
  --off-white: #fafaf9;
  --sand: #e8e6e1;
  --graphite: #2b2d2e;
  --graphite-light: #525456;
  --graphite-lighter: #8a8c8e;
  --accent: #7d8d9a;
  --accent-muted: #a8b5c0;
  --border-color: #d4d2cd;
  --shadow-subtle: rgba(0, 0, 0, 0.04);
  --shadow-card: rgba(0, 0, 0, 0.08);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "SF Pro Display", "Segoe UI", system-ui, sans-serif;
  --font-mono: "SF Mono", "Consolas", "Monaco", monospace;

  /* Spacing Scale */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;

  /* Border */
  --border-thin: 1px;
  --radius-sm: 4px;
  --radius-md: 8px;
}

/* Dot Grid Background */
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--graphite);
  background-color: var(--off-white);
  background-image:
    radial-gradient(circle, var(--border-color) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: 0 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Container System */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container--narrow {
  max-width: 800px;
}

.container--full {
  max-width: 100%;
  padding: 0 var(--space-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--graphite);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: var(--space-md);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  margin-bottom: var(--space-sm);
  font-weight: 500;
}

p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--graphite-light);
  margin-bottom: var(--space-sm);
}

.text-sm {
  font-size: 0.875rem;
  color: var(--graphite-lighter);
}

.text-mono {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: -0.01em;
}

/* Hero Section */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl) 0;
  position: relative;
  opacity: 0;
  animation: fadeInUp 1s ease-out forwards;
  animation-delay: 0.2s;
}

.hero__content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.hero__label {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  border: var(--border-thin) solid var(--border-color);
  border-radius: 50px;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--graphite-lighter);
  margin-bottom: var(--space-lg);
  background: var(--off-white);
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  margin-bottom: var(--space-md);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.hero__subtitle {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  color: var(--graphite-light);
  font-weight: 400;
  line-height: 1.6;
  margin-bottom: var(--space-xl);
}

/* Handwritten Accent */
.handwritten {
  position: relative;
  display: inline-block;
}

.handwritten::after {
  content: '';
  position: absolute;
  left: -4px;
  right: -4px;
  bottom: 2px;
  height: 12px;
  background: linear-gradient(90deg, transparent, var(--accent-muted) 50%, transparent);
  opacity: 0.3;
  z-index: -1;
  transform: rotate(-1deg);
}

/* Card Component */
.card {
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(10px);
  border: var(--border-thin) solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: 0 2px 8px var(--shadow-card);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  opacity: 0;
  animation: fadeInUp 0.8s ease-out forwards;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--shadow-card);
  border-color: var(--accent-muted);
}

.card:hover::before {
  opacity: 1;
}

.card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-md);
  opacity: 0.8;
}

.card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--graphite);
}

.card__description {
  font-size: 0.9375rem;
  color: var(--graphite-light);
  line-height: 1.6;
}

/* Projects Grid */
.projects {
  padding: var(--space-3xl) 0;
}

.projects__header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

/* Project Card (Button-style) */
.project-link {
  display: block;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  border: var(--border-thin) solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-xl);
  text-decoration: none;
  color: var(--graphite);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  opacity: 0;
  animation: fadeInUp 0.8s ease-out forwards;
}

.project-link:nth-child(1) { animation-delay: 0.1s; }
.project-link:nth-child(2) { animation-delay: 0.2s; }
.project-link:nth-child(3) { animation-delay: 0.3s; }

.project-link::after {
  content: '→';
  position: absolute;
  right: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  color: var(--accent);
  opacity: 0;
  transition: all 0.3s ease;
}

.project-link:hover {
  transform: translateX(4px);
  border-color: var(--accent);
  box-shadow: 0 4px 16px var(--shadow-card);
  padding-right: calc(var(--space-xl) + 2rem);
}

.project-link:hover::after {
  opacity: 1;
  right: var(--space-lg);
}

.project-link__title {
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--graphite);
  white-space: nowrap;
}

.project-link__meta {
  font-size: 0.875rem;
  color: var(--graphite-lighter);
  font-family: var(--font-mono);
}

/* Button Component */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border: var(--border-thin) solid var(--graphite);
  border-radius: 50px;
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--graphite);
  background: transparent;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--graphite);
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: -1;
}

.btn:hover {
  color: var(--off-white);
  border-color: var(--graphite);
  transform: translateY(-2px);
}

.btn:hover::before {
  transform: translateY(0);
}

.btn--primary {
  border-color: var(--graphite);
  background: var(--graphite);
  color: var(--off-white);
}

.btn--primary::before {
  background: var(--graphite-light);
  transform: translateY(0);
}

.btn--primary:hover {
  border-color: var(--graphite-light);
}

.btn--primary:hover::before {
  transform: translateY(-100%);
}

/* Footer */
.footer {
  padding: var(--space-2xl) 0 var(--space-xl);
  border-top: var(--border-thin) solid var(--border-color);
  margin-top: var(--space-3xl);
}

.footer__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-md);
}

.footer__contact {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border: var(--border-thin) solid var(--border-color);
  border-radius: 50px;
  background: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  color: var(--graphite);
  font-size: 0.9375rem;
  transition: all 0.3s ease;
}

.footer__contact:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 8px var(--shadow-subtle);
  transform: translateY(-2px);
}

.footer__icon {
  width: 20px;
  height: 20px;
  opacity: 0.6;
}

.footer__text {
  font-size: 0.875rem;
  color: var(--graphite-lighter);
  margin-top: var(--space-sm);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Subtle Grid Overlay for Sections */
.section--grid {
  position: relative;
  background-image:
    linear-gradient(var(--border-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: -1px -1px;
}

/* Decorative Element */
.deco-line {
  width: 100%;
  max-width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
  margin: var(--space-lg) auto;
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.pt-lg { padding-top: var(--space-lg); }
.pb-lg { padding-bottom: var(--space-lg); }

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --space-lg: 1.5rem;
    --space-xl: 2.5rem;
    --space-2xl: 4rem;
    --space-3xl: 5rem;
  }

  .hero {
    min-height: 70vh;
    padding: var(--space-2xl) 0;
  }

  .projects__grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .project-link {
    padding: var(--space-md) var(--space-lg);
  }

  .project-link:hover {
    padding-right: var(--space-lg);
  }

  .project-link::after {
    position: static;
    display: block;
    margin-top: var(--space-xs);
    transform: none;
  }

  .project-link:hover::after {
    opacity: 1;
  }
}

/* Print Styles */
@media print {
  body {
    background: white;
  }

  .hero, .projects {
    page-break-inside: avoid;
  }
}

/* Scroll Reveal Enhancement */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Micro-interactions */
.project-link__title {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-link:hover .project-link__title {
  transform: translateX(4px);
}

/* Smooth Scrolling */
html {
  scroll-behavior: smooth;
}

/* Focus Styles for Accessibility */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

/* Selection Color */
::selection {
  background-color: var(--accent-muted);
  color: var(--graphite);
}

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