/* --- Global Reset & Root Variables --- */
:root {
  --bg-color: #1A1A1A;
  --bg-alternate: #222222; /* For alternating sections */
  --text-color: #E0E0E0;
  --accent-color: #007BFF; /* Electric Blue */
  --card-color: #252525;
  --border-color: #333;

  /* NEW Plyr Player Variables */
  --plyr-color-main: var(--accent-color);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Roboto", "Segoe UI", sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
}

img, svg {
  max-width: 100%;
  display: block;
}

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

h1, h2, h3 {
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.2rem; color: var(--accent-color); }
h3 { font-size: 1.5rem; }

/* --- Reusable Container --- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 1.5rem; /* Increased padding for separation */
}

/* Section Separation */
section:nth-of-type(odd) {
  background-color: var(--bg-alternate);
}

main section:nth-of-type(odd) {
  background-color: var(--bg-alternate);
}
main section:nth-of-type(even) {
  background-color: var(--bg-color);
}


/* --- Navigation Bar --- */
.navbar {
  position: sticky;
  top: 0;
  width: 100%;
  background-color: var(--bg-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  z-index: 1000;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}

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

.nav-menu {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text-color);
  font-weight: 500;
  transition: color 0.3s ease;
}

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

/* Mobile Nav Toggle (Hamburger) */
.nav-toggle {
  display: none;
  font-size: 1.5rem;
  background: none;
  border: none;
  color: var(--text-color);
  cursor: pointer;
}

/* --- Hero Section (with texture) --- */
.hero {
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 1.5rem;
  background-image: linear-gradient(rgba(26, 26, 26, 0.8), rgba(26, 26, 26, 0.8)), url('images/subtle-texture.png');
  background-size: cover;
  background-position: center;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 0.5rem;
}
.hero-subtitle {
  font-size: 1.5rem;
  font-weight: 300;
  margin-bottom: 1rem;
}
.hero-bio {
  font-size: 1.1rem;
  max-width: 600px;
  margin-bottom: 2rem;
}

.btn {
  display: inline-block;
  background-color: var(--accent-color);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 5px;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: background-color 0.3s ease;
}
.btn:hover {
  background-color: #0056b3;
}

/* --- About Section (reversed) --- */
.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr; /* Text left, image right */
  gap: 3rem;
  align-items: center;
}

.about-links {
  margin-top: 1.5rem;
  display: flex;
  gap: 1.5rem;
}
.about-links a {
  font-size: 2rem;
  transition: color 0.3s ease;
}
.about-links a:hover {
  color: #fff;
}

/* Headshot Styling */
.headshot-wrapper {
  position: relative;
  width: 250px;
  height: 250px;
  justify-self: center;
}
.about-headshot {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}
/* Animated Border */
.headshot-wrapper::before {
  content: '';
  position: absolute;
  top: -5px; left: -5px;
  width: calc(100% + 10px);
  height: calc(100% + 10px);
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    #007BFF, #FF00FF, #00FF00, #FFFF00, #007BFF
  );
  animation: spin 3s linear infinite;
  z-index: -1;
}
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* --- Skills Section (Cards) --- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}
.skill-card {
  background-color: var(--card-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.skill-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 15px rgba(0, 123, 255, 0.1);
}
.skill-card h3 {
  color: var(--accent-color);
  border-bottom: 2px solid var(--accent-color);
  padding-bottom: 0.5rem;
}
.skill-card ul {
  list-style: none;
  padding-top: 1rem;
}
.skill-card li {
  margin-bottom: 0.5rem;
  position: relative;
  padding-left: 1.5rem;
}
.skill-card li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent-color);
}

/* --- Projects Section (Sequential) --- */
.project-block {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2.5rem;
  align-items: center;
  margin-bottom: 4.5rem; /* Space between projects */
}
.project-block:last-child {
  margin-bottom: 0;
}
.project-svg-container {
  padding: 2rem;
  background-color: var(--card-color);
  border-radius: 8px;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
}
.project-svg {
  width: 100%;
  height: auto;
  max-width: 200px; /* control max size */
  fill: var(--accent-color);
}

/* Reverse layout for even-numbered projects */
main section#projects .project-block:nth-of-type(even) {
  grid-template-columns: 2fr 1fr;
}
main section#projects .project-block:nth-of-type(even) .project-svg-container {
  grid-column: 2;
}
main section#projects .project-block:nth-of-type(even) .project-content {
  grid-column: 1;
  grid-row: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}
.project-tag {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 0.25rem 0.75rem;
  border-radius: 15px;
  font-size: 0.8rem;
}

/* --- Education Section --- */
.education-entry {
  padding: 1.5rem;
  border-left: 4px solid var(--accent-color);
  background-color: var(--card-color);
  border-radius: 0 8px 8px 0;
}
.education-entry p {
  margin: 0;
}
.education-entry h3 {
  margin-bottom: 0.25rem;
}

/* --- Contact Section --- */
#contact {
  text-align: center;
}
.contact-links {
  margin-top: 1.5rem;
  display: flex;
  justify-content: center;
  gap: 2rem;
}
.contact-links a {
  font-size: 2.5rem;
  transition: color 0.3s ease;
}
.contact-links a:hover {
  color: #fff;
}

/* --- Articles & Videos Page --- */
.page-hero {
  padding: 4rem 1.5rem;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}
.page-hero h1 {
  color: var(--accent-color);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.article-card {
  background-color: var(--card-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.article-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 15px rgba(0, 123, 255, 0.1);
}
.card-thumbnail {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background-color: #333;
}
.card-content {
  padding: 1.5rem;
}
.card-content .btn {
  margin-top: 1rem;
}

/* --- NEW Video Page Styling --- */
.video-card {
  position: relative;
  background-color: var(--card-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

/* This makes the Plyr player have sharp corners to match the card */
.video-card .plyr {
  border-radius: 0;
}

.video-info {
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.video-info h3 {
  font-size: 1.2rem;
  margin: 0;
}
.video-share-btn {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 1.25rem;
  cursor: pointer;
  transition: color 0.3s ease;
}
.video-share-btn:hover {
  color: var(--accent-color);
}
/* Tooltip for 'Link Copied' */
.tooltip {
  position: relative;
  display: inline-block;
}
.tooltip .tooltiptext {
  visibility: hidden;
  width: 120px;
  background-color: var(--accent-color);
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 5px 0;
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  margin-left: -60px;
  opacity: 0;
  transition: opacity 0.3s;
}
.tooltip .tooltiptext::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: var(--accent-color) transparent transparent transparent;
}
.tooltip.show .tooltiptext {
  visibility: visible;
  opacity: 1;
}

/* --- Article Page --- */
.article-content {
  max-width: 800px;
}
.article-content p,
.article-content ul,
.article-content ol {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}
.article-content ul,
.article-content ol {
  margin-left: 2rem;
}
.article-content li {
  margin-bottom: 0.5rem;
}
.article-content h3 {
  color: var(--accent-color);
  margin-top: 2rem;
  margin-bottom: 1rem;
}
.article-list-styled {
  list-style: none;
  padding-left: 1rem;
}
.article-list-styled li {
  position: relative;
  padding-left: 1rem;
}

/* --- Mobile Responsiveness --- */
@media (max-width: 768px) {
  h1 { font-size: 2.5rem; }
  .hero h1 { font-size: 2.8rem; }
  .hero-subtitle { font-size: 1.2rem; }

  .nav-menu {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 65px; /* Height of navbar */
    left: 0;
    width: 100%;
    background-color: var(--card-color);
    padding: 1rem;
  }
  .nav-menu.active {
    display: flex;
  }
  .nav-toggle {
    display: block;
  }

  .about-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .about-content {
    order: 2; /* Text comes after image */
  }
  .headshot-wrapper {
    order: 1; /* Image comes first */
    margin-bottom: 2rem;
  }
  .about-links {
    justify-content: center;
  }

  .project-block,
  main section#projects .project-block:nth-of-type(even) {
    grid-template-columns: 1fr;
  }
  main section#projects .project-block:nth-of-type(even) .project-svg-container {
    grid-column: 1;
  }
  main section#projects .project-block:nth-of-type(even) .project-content {
    grid-column: 1;
    grid-row: 2;
  }
  .project-svg-container {
    max-width: 250px;
    margin: 0 auto;
  }
}