/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-bg: #0a0a0a;
  --color-bg-secondary: #0a0a0a; /* Glassmorphism handles nav */
  --color-text: #fafafa;
  --color-text-secondary: #a1a1aa;
  --color-accent: #512BD4; /* .NET Purple */
  --color-accent-hover: #6A4AE6; /* Lighter Purple */
  --color-border: #27272a;
  --color-card-bg: #171717;
  --spacing-unit: 1rem;
  --max-width: 1100px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
    "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
    sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

h1 {
  font-size: 3.5rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.5rem;
  margin-bottom: calc(var(--spacing-unit) * 1.5);
}

h3 {
  font-size: 1.5rem;
  color: var(--color-accent);
}

p {
  margin-bottom: var(--spacing-unit);
  color: var(--color-text-secondary);
}

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

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

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 calc(var(--spacing-unit) * 2);
}

/* Navigation Bar */
.navbar {
  background-color: rgba(10, 10, 10, 0.7); /* Translucent background */
  border-bottom: 1px solid rgba(39, 39, 42, 0.6);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-unit);
  padding-bottom: var(--spacing-unit);
}

.nav-brand {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-accent);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: calc(var(--spacing-unit) * 2);
}

.nav-menu a {
  color: var(--color-text-secondary);
  font-weight: 500;
  transition: var(--transition);
}

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

.hamburger {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  gap: 5px;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 2px;
  transition: var(--transition);
}

/* Hero Section */
.hero {
  padding: calc(var(--spacing-unit) * 10) 0 calc(var(--spacing-unit) * 8);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(81, 43, 212, 0.15) 0%, transparent 70%);
  z-index: -1;
}

.hero h1 {
  background: linear-gradient(135deg, var(--color-text), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-unit);
}

.hero-title {
  font-size: 1.75rem;
  color: var(--color-text);
  margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: calc(var(--spacing-unit) * 2);
}

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

/* Buttons */
.btn {
  padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5);
  border: 1px solid var(--color-accent);
  border-radius: 8px;
  font-weight: 600;
  transition: var(--transition);
  display: inline-block;
  cursor: pointer;
  letter-spacing: 0.02em;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #fff;
  box-shadow: 0 4px 14px 0 rgba(81, 43, 212, 0.39);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  box-shadow: 0 6px 20px rgba(81, 43, 212, 0.23);
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

/* Sections */
.section {
  padding: calc(var(--spacing-unit) * 6) 0;
  border-top: 1px solid var(--color-border);
}

.section:first-of-type {
  border-top: none;
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: calc(var(--spacing-unit) * 2);
}

.skill-category {
  background-color: var(--color-card-bg);
  padding: calc(var(--spacing-unit) * 2);
  border-radius: 12px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.skill-category:hover {
  border-color: rgba(81, 43, 212, 0.5);
  transform: translateY(-4px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.skill-category h3 {
  margin-top: 0;
  color: var(--color-text);
  font-size: 1.25rem;
}

.skill-items {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--spacing-unit) * 0.75);
}

.skill-tag {
  background-color: rgba(81, 43, 212, 0.15);
  color: #c4b5fd; /* Light purple for better contrast against dark background */
  padding: calc(var(--spacing-unit) * 0.4) calc(var(--spacing-unit) * 1);
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid rgba(81, 43, 212, 0.4);
}

/* Experience Section */
.experience-list {
  display: grid;
  gap: calc(var(--spacing-unit) * 2);
  position: relative;
}

.experience-item {
  background-color: var(--color-card-bg);
  padding: calc(var(--spacing-unit) * 2);
  border-radius: 12px;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  transition: var(--transition);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.experience-item:hover {
  transform: translateX(6px);
  border-color: rgba(81, 43, 212, 0.5);
  border-left: 4px solid var(--color-accent);
}

.experience-item h3 {
  margin-bottom: calc(var(--spacing-unit) * 0.25);
  color: var(--color-text);
}

.experience-company {
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: calc(var(--spacing-unit) * 0.25);
}

.experience-period {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-unit);
}

/* Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: calc(var(--spacing-unit) * 2);
}

.project-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: calc(var(--spacing-unit) * 2);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.project-card:hover {
  border-color: rgba(81, 43, 212, 0.5);
  transform: translateY(-6px);
  box-shadow: 0 12px 24px -10px rgba(81, 43, 212, 0.25);
}

.project-name {
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.project-description {
  flex-grow: 1;
  margin-bottom: var(--spacing-unit);
}

.project-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  padding-top: var(--spacing-unit);
  border-top: 1px solid var(--color-border);
}

.project-link {
  color: var(--color-accent);
  font-weight: 600;
}

.project-link:hover {
  color: var(--color-accent-hover);
}

/* Utility Classes */
.loading {
  text-align: center;
  padding: calc(var(--spacing-unit) * 4) 0;
  color: var(--color-text-secondary);
}

.error {
  background-color: rgba(255, 100, 100, 0.1);
  border: 1px solid rgba(255, 100, 100, 0.3);
  color: #ff6464;
  padding: calc(var(--spacing-unit) * 1.5);
  border-radius: 8px;
  text-align: center;
}

/* Footer */
.footer {
  border-top: 1px solid var(--color-border);
  padding: calc(var(--spacing-unit) * 3) 0;
  text-align: center;
  background-color: var(--color-bg-secondary);
}

.footer p {
  margin-bottom: 0;
  color: var(--color-text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 1.875rem;
  }

  .nav-menu {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(10px, 10px);
  }

  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }

  .hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }

  .nav-menu.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-unit);
    gap: var(--spacing-unit);
  }

  .nav-menu.active a {
    display: block;
    padding: calc(var(--spacing-unit) * 0.75) 0;
  }

  .hero {
    padding: calc(var(--spacing-unit) * 4) 0;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-title {
    font-size: 1.25rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-contact {
    gap: calc(var(--spacing-unit) * 0.75);
  }

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

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

  .section {
    padding: calc(var(--spacing-unit) * 4) 0;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-unit: 0.875rem;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.375rem;
  }

  .btn {
    font-size: 0.875rem;
    padding: calc(var(--spacing-unit) * 0.6) calc(var(--spacing-unit) * 1.2);
  }

  .hero-contact {
    flex-direction: column;
  }

  .hero-contact .btn {
    width: 100%;
  }
}