/* CSS Reset & Variables */
:root {
  /* Dark Theme (Default) */
  --bg-body: #0a0a0a;
  --bg-card: #171717;
  --bg-card-hover: #262626;
  --text-main: #ededed;
  --text-muted: #a1a1aa;
  --accent: #6366f1; /* Indigo 500 */
  --accent-glow: rgba(99, 102, 241, 0.15);
  --border: #262626;
  --border-hover: #404040;

  /* Typography */
  --font-heading: "Outfit", sans-serif;
  --font-body: "Inter", sans-serif;

  /* Spacing */
  --container-width: 900px;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;

  /* Animation */
  --transition: all 0.2s ease-in-out;
}

/* Light Theme Overrides */
body.light-theme {
  --bg-body: #ffffff;
  --bg-card: #f4f4f5;
  --bg-card-hover: #e4e4e7;
  --text-main: #09090b;
  --text-muted: #71717a;
  --accent: #4f46e5;
  --accent-glow: rgba(79, 70, 229, 0.1);
  --border: #e4e4e7;
  --border-hover: #d4d4d8;
}

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

body {
  background-color: var(--bg-body);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

ul {
  list-style: none;
}

header,
main,
footer {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

@media (max-width: 640px) {
  header,
  main,
  footer {
    padding: 0 var(--spacing-md);
  }
}

/* Header */
header {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

nav {
  display: flex;
  gap: var(--spacing-lg); /* Slightly more gap for text */
}

nav a {
  color: var(--text-muted);
  font-size: 1rem; /* Base size for text */
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

nav a i {
  font-size: 1.5rem; /* Larger icons */
}

nav a:hover {
  color: var(--text-main);
  transform: translateY(-2px);
}

@media (max-width: 640px) {
  nav {
    gap: var(--spacing-md);
  }
  nav a span {
    display: none; /* Hide labels on mobile */
  }
  nav a i {
    font-size: 1.25rem;
  }
}

/* Hero Section */
.hero-section {
  padding: var(--spacing-xl) 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  max-width: 600px;
}

.intro-header h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  background: linear-gradient(to right, #fff, #a1a1aa);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--spacing-sm);
}

.subtitle {
  color: var(--accent);
  font-weight: 600;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  letter-spacing: 0.05em;
}

.intro-description {
  color: var(--text-muted);
  font-size: 1.125rem;
  font-weight: 300;
  max-width: 500px;
  margin-top: var(--spacing-sm);
}

@media (max-width: 640px) {
  .hero-section {
    padding: var(--spacing-lg) 0;
  }
  .intro-header h1 {
    font-size: clamp(2rem, 8vw, 2.5rem);
  }
  .intro-description {
    font-size: 1rem;
  }
}

.links-container {
  margin-top: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md); /* Space between Email and Resume buttons */
  flex-wrap: wrap;
}

/* Scroll Reveal Initial States */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

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

.cta-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 500;
  color: var(--text-main);
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
}

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

/* Skills Section */
.skills-section {
  margin-top: var(--spacing-xl);
}

.skills-section h2,
.projects-section h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin-bottom: var(--spacing-lg);
  border-left: 2px solid var(--accent);
  padding-left: var(--spacing-md);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

@media (max-width: 480px) {
  .skills-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
}

.skill-category h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.skill-tags span {
  font-size: 0.875rem;
  background: var(--bg-card);
  padding: 0.25rem 0.75rem;
  border-radius: 999px; /* Pill shape */
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: var(--transition);
  cursor: default;
}

.skill-tags span:hover {
  background: var(--bg-card-hover);
  color: var(--text-main);
  border-color: var(--border-hover);
}

/* Certifications Section */
.certifications-section {
  margin-top: var(--spacing-xl);
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: var(--spacing-md);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--spacing-md);
  transition: var(--transition);
}

.cert-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  background: var(--bg-card-hover);
}

.cert-info h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
  line-height: 1.4;
}

.issuer {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.cert-link {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-bottom: 1px solid transparent;
  width: fit-content;
}

.cert-link:hover {
  color: var(--text-main);
  border-bottom-color: var(--accent);
}

/* Projects Section */
.projects-section {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.cards-grid {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px; /* Smooth corners */
  overflow: hidden;
  display: flex;
  flex-direction: column-reverse; /* Image on top on mobile if we want, but sticking to design */
  transition: var(--transition);
}

@media (min-width: 768px) {
  .project-card {
    flex-direction: row;
    align-items: stretch;
    min-height: 220px;
  }
}

.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.5);
}

.card-content {
  flex: 1;
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.card-header h4 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
}

.date {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: "Courier New", monospace; /* Monospace for date looks techy */
}

.tech-list {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.tech-list span {
  font-size: 0.75rem;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
}

.project-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: var(--spacing-lg);
  flex-grow: 1; /* Pushes links to bottom if needed */
}

.project-links {
  display: flex;
  gap: var(--spacing-md);
}

.project-links a {
  font-size: 0.9rem;
  font-weight: 500;
  border-bottom: 1px solid transparent;
}

.project-links a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.img-div {
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

@media (min-width: 768px) {
  .img-div {
    width: 320px;
    flex-shrink: 0;
  }
}

.big-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.8;
  transition: var(--transition);
}

.project-card:hover .big-img {
  opacity: 1;
  transform: scale(1.05);
}

/* More Projects Section */
.other-projects-section {
  margin-bottom: var(--spacing-xl);
}

.other-projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.small-project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: var(--spacing-lg);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  transition: var(--transition);
}

.small-project-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
}

.small-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.small-project-icon {
  font-size: 1.5rem;
  color: var(--accent);
}

.small-project-links {
  display: flex;
  gap: var(--spacing-md);
  color: var(--text-muted);
}

.small-project-links a:hover {
  color: var(--text-main);
}

.small-project-card h4 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
}

.small-project-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: auto; /* Pushes tech list to bottom */
}

.small-tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: var(--spacing-md);
}

.small-tech-list span {
  font-size: 0.7rem;
  font-family: var(--font-body);
  color: var(--text-muted);
  font-weight: 500;
}

/* Header Navigation Enhancements */
.theme-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  margin-right: var(--spacing-sm);
}

.theme-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-main);
  border-color: var(--border-hover);
}

/* Secondary CTA Link (Resume) */
.cta-link.secondary {
  color: var(--text-muted);
}

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

/* GitHub Stats */
.github-stats-container {
  margin-top: var(--spacing-xl);
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  justify-content: center;
  background: var(--bg-card);
  padding: var(--spacing-lg);
  border-radius: 12px;
  border: 1px solid var(--border);
}

.stats-img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

.stats-img.chart {
  width: 100%;
  padding: var(--spacing-md);
  filter: brightness(0.9) contrast(1.1);
}

@media (max-width: 640px) {
  .github-stats-container {
    padding: var(--spacing-md);
    gap: var(--spacing-md);
  }
  .stats-img.chart {
    padding: 0;
  }
}

/* Footer */
footer {
  text-align: center;
  padding: var(--spacing-xl) 0;
  color: var(--text-muted);
  font-size: 0.875rem;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

footer a {
  color: var(--text-main);
  font-weight: 500;
}

/* Interactive Color Picker (Hidden for minimal look but functional) */
.color-div {
  position: absolute;
  bottom: 2rem;
  right: 2rem;
  background: var(--bg-card);
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  z-index: 100;
}