/* ===========================
   Global / Typography
   =========================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swap');

:root {
  --header-height: 5rem; /* Define header height */
  --bg-primary: #f9fafb; /* Off-white background */
  --text-primary: #374151; /* Dark gray for text */
  --accent: #6b7280; /* Light gray for secondary text */
  --border: #e5e7eb; /* Light gray for borders */
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; min-height: 100vh; }
body {
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  color: var(--text-primary);
  line-height: 1.6;
  background-color: var(--bg-primary);
  background-image: none; /* Remove background image and watermark */
}

/* ===========================
   Header / Nav
   =========================== */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  background-color: #e0e3e6;
  border: 1px solid #d1d5db;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  z-index: 1000;
  padding: 1.5rem 2rem;
  height: var(--header-height); /* Set explicit height */
  display: flex;
  justify-content: space-between;
  align-items: center;
}
header.header-sticky { position: sticky; }
header.header-sticky { position: sticky; }
header h1 {
  font-family: 'Roboto', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}
header nav {
  display: flex;
  gap: 1.5rem;
}
header nav a {
  color: var(--text-primary);
  text-decoration: none;
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  padding: 0.25rem;
}
header nav a:focus { outline: 2px solid var(--text-primary); }
header nav a:hover { color: var(--accent); }
header.header-hidden { transform: translateY(-100%); opacity: 0; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}
.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}
.hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translateY(8px);
}
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translateY(-8px);
}

/* Mobile nav */
.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--bg-primary);
  position: absolute;
  top: 60px; left: 0; right: 0;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  transform: translateY(-20px);
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.mobile-nav.show {
  display: flex;
  transform: translateY(0);
  opacity: 1;
}
.mobile-nav a {
  padding: 0.75rem 0;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
}
.mobile-nav a:hover { color: var(--accent); }

/* Show hamburger only on mobile */
@media (max-width: 768px) {
  header nav { display: none; }
  .hamburger { display: flex; }
  header h1 { font-size: 1.2rem; }
  header { padding: 1rem; }
}

/* ===========================
   Sections
   =========================== */
main {
  max-width: 1200px;
  margin: calc(var(--header-height) + 0.5rem) auto 2rem; /* Dynamic margin */
  padding: 0 2rem;
}

/* Replace or adjust in existing hero */
.hero {
  min-height: 200px;
  text-align: center;
  padding: 1rem 0; /* Reduced from 2rem 0 to 1rem 0 */
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}
section {
  padding: 2rem 0;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}
h2 {
  font-family: 'Roboto', sans-serif;
  font-size: 1.8rem;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  font-weight: 700;
}
.social-title { font-family: 'Roboto', sans-serif; font-size: 1.8rem; color: var(--text-primary); margin-bottom: 1.5rem; font-weight: 700; }

/* ===========================
   About Section
   =========================== */
.about-container {
  display: flex;
  align-items: flex-start;
  gap: 3rem;
}
.about-photo {
  width: 300px;
  height: 300px;
  object-fit: cover;
  border-radius: 8px;
}
.about-text { flex: 1; }
.about-tagline { font-size: 1.2rem; font-weight: 500; margin-bottom: 1rem; }
@media (max-width: 768px) {
  .about-container { flex-direction: column; text-align: center; }
  .about-photo { width: 100%; height: auto; }
}

/* ===========================
   Project Details
   =========================== */
.project-details {
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 1.5rem;
}
/* Existing or updated .project-details img */
.project-details img {
  width: 100%;
  max-width: 600px;
  height: auto;
  margin: 1rem 0;
  border-radius: 8px;
  cursor: zoom-in;
  image-rendering: -webkit-optimize-contrast;
  object-fit: contain;
  transition: transform 0.3s ease, max-width 0.3s ease; /* Smooth transition for enlarge */
}

/* New class for enlarged state */
.project-details img.enlarged {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 90vw; /* Limits to 90% of viewport width */
  max-height: 90vh; /* Limits to 90% of viewport height */
  z-index: 1000;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
  cursor: zoom-out; /* Indicates click to revert */
}

/* ===========================
   Modal (for images)
   =========================== */
.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0; top: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.75);
  justify-content: center;
  align-items: center;
}
.modal-open { display: flex; }
.modal-content {
  max-width: 90%;
  max-height: 90%;
  border-radius: 8px;
}
.modal-close {
  position: absolute;
  top: 20px; right: 30px;
  font-size: 2rem;
  color: white;
  background: transparent;
  border: none;
  cursor: pointer;
}

/* ===========================
   Social Page Embeds (FIXED)
   =========================== */
.social-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  justify-items: center;
}
.social-card {
  width: 100%;
  max-width: 420px;
  height: 520px;
  display: flex;
  justify-content: center;
  align-items: stretch;
  overflow: hidden;
  border: 1px solid var(--border);
}
.social-card blockquote.instagram-media {
  flex: 1;
  width: 100% !important;
  height: 100% !important;
}
.linkedin-card iframe {
  height: 100%;
  width: 100%;
  border: 0;
}
/* Instagram embeds: always visible, dynamic height */
.social-card blockquote.instagram-media,
.social-card iframe[src*="instagram.com"] {
  width: 100% !important;
  max-width: 540px;
  border: 0 !important;
  margin: auto;
  opacity: 1 !important;
  height: auto !important;
}
/* Strava + LinkedIn fade in smoothly after load */
.linkedin-card iframe,
.strava-embed-placeholder iframe {
  opacity: 0;
  transition: opacity 0.5s ease-in;
}
.social-card.loaded iframe,
.social-card.loaded .strava-embed-placeholder iframe {
  opacity: 1;
}
/* Mobile adjustments */
@media (max-width: 480px) {
  .social-card {
    width: 100%;
    min-height: 300px;
  }
}
@media (prefers-reduced-motion) {
  .social-card iframe,
  .strava-embed-placeholder iframe { transition: none; }
}

/* ===========================
   Footer
   =========================== */
footer {
  text-align: center;
  padding: 2rem 0;
  color: var(--accent);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
}
.backup-note { font-size: 0.8rem; margin-top: 0.5rem; }

/* ===========================
   Books Page
   =========================== */
/* Replace or adjust in existing .book-details section */
.book-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); /* Default for small screens */
  gap: 2rem;
  margin-bottom: 1.5rem;
}
.book-details img {
  max-width: 200px;
  height: 300px; /* Fixed height for uniformity */
  object-fit: cover; /* Crops to fit while preserving aspect ratio */
  margin: 1rem 0;
  border-radius: 8px;
}
.book-details h3 {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}
.book-description {
  font-size: 0.9rem;
  color: var(--accent);
}

/* Media Queries for Side-by-Side */
@media (min-width: 640px) {
  .book-details {
    grid-template-columns: repeat(2, 1fr); /* Two columns on tablets and up */
  }
}

@media (min-width: 1024px) {
  .book-details {
    grid-template-columns: repeat(3, 1fr); /* Three columns on desktops */
  }
}

/* ===========================
   Contact Form
   =========================== */
.contact-form {
  display: grid;
  gap: 1.5rem;
  max-width: 600px;
  margin: 0 auto 2rem;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
}
.contact-form textarea { height: 120px; resize: vertical; }
.contact-form .btn {
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
  transition: background 0.2s ease;
}
.contact-form .btn:hover { background: var(--accent); }
.contact-text {
  margin-top: 2rem;
  margin-bottom: 1rem;
  text-align: center;
}