:root {
  /* Dark Theme (Default) */
  --bg-color: #121212;
  --text-color: #e0e0e0;
  --nav-bg: #1f1f1f;
  --accent-color: #bb86fc;
  --nav-text: #ffffff;
  --card-bg: #1e1e1e;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

/* Light Theme Override */
body:has(#theme-toggle:checked) {
  --bg-color: #f5f5f5;
  --text-color: #212121;
  --nav-bg: #ffffff;
  --accent-color: #6200ee;
  --nav-text: #000000;
  --card-bg: #ffffff;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Navbar Styling */
nav {
  background-color: var(--nav-bg);
  color: var(--nav-text);
  padding: 1rem 2rem;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
  text-transform: lowercase;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 0.5rem;
  align-items: center;
  grid-column: 2;
}

.nav-links li:not(:last-child)::after {
  content: "//";
  margin-left: 0.5rem;
  opacity: 0.5;
}

.nav-links a {
  text-decoration: none;
  color: inherit;
  font-weight: 500;
  transition: color 0.3s;
}

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

/* Custom Tooltip for links with a title */
.nav-links a[title] {
  position: relative;
}

.nav-links a[title]::before {
  content: attr(title);
  position: absolute;
  bottom: -35px;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background-color: var(--nav-bg);
  color: var(--nav-text);
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 0.75rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 1001;
}

.nav-links a[title]:hover::before {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

body:has(#theme-toggle:checked) .nav-links a[title]::before {
  background-color: #fff;
  color: #000;
  border-color: rgba(0, 0, 0, 0.1);
}

.theme-switch-wrapper {
  display: flex;
  align-items: center;
  grid-column: 3;
  justify-self: end;
}

#theme-toggle {
  display: none;
}

.theme-switch-label {
  cursor: pointer;
  padding: 5px;
  background-color: #333;
  width: 50px;
  height: 26px;
  border-radius: 50px;
  position: relative;
  transition: background-color 0.3s;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.theme-switch-label svg {
  width: 14px;
  height: 14px;
  z-index: 1;
  transition: opacity 0.3s;
}

.sun-icon {
  color: #ffb100;
  opacity: 0;
  margin-left: 4px;
}

.moon-icon {
  color: #f5f5f5;
  opacity: 1;
  margin-right: 4px;
}

body:has(#theme-toggle:checked) .sun-icon {
  opacity: 1;
}

body:has(#theme-toggle:checked) .moon-icon {
  opacity: 0;
}

.theme-switch-label::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  background-color: #fff;
  border-radius: 50%;
  transition: transform 0.3s;
  z-index: 2;
}

body:has(#theme-toggle:checked) .theme-switch-label {
  background-color: var(--accent-color);
}

body:has(#theme-toggle:checked) .theme-switch-label::after {
  transform: translateX(24px);
}

/* Tech Stack Refinement */
.tech-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.tech-category h4 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.8rem;
  opacity: 0.7;
  color: var(--accent-color);
}

.tech-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.tech-pill {
  background-color: var(--card-bg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.3s ease;
  cursor: default;
}

.tech-pill:hover {
  border-color: var(--accent-color);
  background-color: rgba(187, 134, 252, 0.1);
  transform: translateY(-2px);
}

body:has(#theme-toggle:checked) .tech-pill {
  border-color: rgba(0, 0, 0, 0.1);
  background-color: #fff;
}

body:has(#theme-toggle:checked) .tech-pill:hover {
  background-color: rgba(98, 0, 238, 0.05);
  border-color: var(--accent-color);
}

/* Layout with Sidebar */
.page-layout {
  display: grid;
  grid-template-columns: 1fr 800px 1fr;
  max-width: 1400px;
  margin: 2rem auto;
  gap: 2rem;
  padding: 0 1rem;
  flex: 1;
  width: 100%;
}

main {
  grid-column: 2;
  width: 100%;
  text-align: left;
}

.sidebar {
  grid-column: 1;
  justify-self: end;
  min-width: 250px;
  max-width: 300px;
  height: fit-content;
  position: sticky;
  top: 6rem; /* Increased to stay below the sticky navbar */
}

.sidebar h1 {
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
}

.sidebar p strong {
  font-size: 0.9rem;
  opacity: 0.8;
}

.sidebar-info {
  margin-top: 1.5rem;
  width: 100%;
}

.sidebar-info p {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.6rem;
  font-size: 0.85rem;
  line-height: 1.2;
}

.sidebar-icon {
  width: 1rem;
  height: 1rem;
  color: var(--accent-color);
  flex-shrink: 0;
}

/* Responsiveness for Sidebar */
@media (max-width: 1200px) {
  .page-layout {
    display: flex;
    flex-direction: column;
    max-width: 800px;
    margin: 1rem auto;
  }
  .sidebar {
    order: 1;
    max-width: 100%;
    width: 100%;
  }
  main {
    order: 2;
  }
  .sidebar .card {
    position: static;
  }
}

.card {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 8px;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

h1, h2, .section-title {
  color: var(--accent-color);
  margin-bottom: 1rem;
  text-align: center;
  width: 100%;
  text-transform: uppercase;
  letter-spacing: 2px;
}

h2, .section-title {
  margin-top: 2rem;
}

.hero-image {
  width: 100%;
  height: auto;
  margin-bottom: 2rem;
  opacity: 0.9;
  transition: opacity 0.3s;
  border-radius: 4px;
}

body:has(#theme-toggle:checked) .hero-image {
  filter: invert(1) hue-rotate(180deg);
}

.hero-image:hover {
  opacity: 1;
}

.card ul {
  list-style-type: none;
  padding-left: 0;
}

.card li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
}

.card li::before {
  content: "•";
  color: var(--accent-color);
  position: absolute;
  left: 0;
  font-weight: bold;
}

.cv-section {
  margin-bottom: 2rem;
}

.cv-item {
  margin-bottom: 1.5rem;
}

.cv-item h3 {
  margin-bottom: 0.25rem;
}

.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 1rem;
  width: 100%;
}

/* 2 columns (50% each) on medium and large screens */
@media (min-width: 650px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.project-card {
  background-color: rgba(255, 255, 255, 0.03);
  padding: 1rem;
  border-radius: 6px;
  border-left: 3px solid var(--accent-color);
  transition: transform 0.2s;
}

.project-card:hover {
  transform: translateY(-2px);
}

.project-card h4 {
  margin-bottom: 0.5rem;
  font-size: 1rem;
  color: var(--accent-color);
}

.project-card p {
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
  line-height: 1.4;
}

.tag-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag {
  background-color: var(--accent-color);
  color: var(--nav-bg);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: bold;
  text-transform: uppercase;
}

body:has(#theme-toggle:checked) .project-card {
  background-color: rgba(0, 0, 0, 0.03);
}

body:has(#theme-toggle:checked) .tag {
  color: #fff;
}

footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.9rem;
  opacity: 0.7;
}

/* Responsiveness */
@media (max-width: 600px) {
  nav {
    flex-direction: column;
    gap: 1rem;
  }
  .nav-links {
    gap: 1rem;
  }
}