/* Import Inter font as a fallback */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@200;300;400&family=Playfair+Display:ital,wght@0,400;0,500;1,400&display=swap');

:root {
  /* Sleek Apple-like Dark Mode */
  --bg-darkest: #000000;
  --bg-dark: #151516;
  --bg-medium: #1d1d1f;
  --bg-light: #2c2c2e;
  --accent: #2997ff;
  --accent-hover: #0071e3;
  --text-muted: #94a3b8;
  --text-primary: #f5f5f7;
  --text-bright: #ffffff;

  /* Typography scale */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1.0625rem;
  --font-size-lg: 1.1rem;
  --font-size-xl: 1.4rem;

  /* Radii & shadows */
  --border-radius: 18px;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --box-shadow-hover: 0 12px 30px rgba(0, 0, 0, 0.5);

  /* Motion */
  --transition-speed: 0.3s;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;

  /* Focus ring */
  --focus-ring: 0 0 0 4px rgba(41, 151, 255, 0.3);

  /* Fonts - System fonts */
  --font-headers: 'Playfair Display', serif;
  --font-body: 'Inter', sans-serif;
}

html,
body {
  background-color: var(--bg-darkest);
  color: var(--text-primary);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

h4 {
  margin-left: 1.5rem;
  color: var(--text-muted) !important;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.6;
  font-size: var(--font-size-base);
  letter-spacing: 0.01em;
}

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

main {
  width: 95%;
  max-width: 1024px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.home-page,
.blog-page,
.projects-page {
  max-width: 800px;
  padding: 4rem 1.5rem;
}

/* Navigation - Glassmorphism */
nav {
  font-family: var(--font-body);
  background-color: rgba(0, 0, 0, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding: 0.8rem 1rem;
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: all var(--transition-speed);
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
  max-width: 1024px;
  margin: 0 auto;
}

nav ul li a {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: -0.01em;
  opacity: 0.8;
  transition: opacity var(--transition-speed);
}

nav ul li a:hover {
  opacity: 1;
  color: var(--text-bright);
}

nav ul li.active a {
  color: var(--text-bright);
  opacity: 1;
}

/* Header */
.header,
.page-header {
  padding: 4rem 0 2rem;
  text-align: center;
  color: var(--text-bright);
}

/* Sections & Cards */
section,
article,
.card {
  background-color: var(--bg-medium);
  border-radius: var(--border-radius);
  padding: 2.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--box-shadow);
  transition:
    transform var(--transition-speed),
    box-shadow var(--transition-speed);
}

section:hover,
article:hover,
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--box-shadow-hover);
}

.home-page .blog-section,
.blog-page .blog-post-list {
  background-color: transparent;
  border-radius: 0;
  padding: 0;
  box-shadow: none;
}

.home-page .blog-section:hover,
.blog-page .blog-post-list:hover {
  transform: none;
  box-shadow: none;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-headers);
  color: var(--text-bright);
  margin-bottom: 1rem;
  font-weight: 400;
  letter-spacing: 0.02em;
}

h1 {
  font-size: 3.5rem;
  font-weight: 400;
  font-style: italic;
  letter-spacing: 0.02em;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2.5rem;
  margin-bottom: 1.25rem;
}

h3 {
  font-size: 1.5rem;
}

p,
li,
span {
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.subtitle {
  font-size: 1.5rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: -0.015em;
  margin-bottom: 2rem;
}

/* Links */
a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-speed);
}

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

/* Buttons */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  background: var(--text-bright);
  color: var(--bg-darkest);
  padding: 0.8rem 1.5rem;
  border-radius: 980px;
  text-align: center;
  transition: all var(--transition-speed);
  border: none;
  cursor: pointer;
}

.btn:hover {
  background: var(--text-primary);
  transform: scale(1.02);
  color: var(--bg-darkest);
}

.home-page .btn {
  margin-top: 1rem;
}

/* Blog Posts */
.blog-posts-container,
#blog-posts-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .blog-posts-container {
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  }
}

/* Square Collection for Projects Page */
.projects-page .blog-post-list {
  background-color: transparent;
  padding: 0;
  box-shadow: none;
}

.projects-page #blog-posts-container {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.projects-page .blog-post-card {
  aspect-ratio: 1 / 1;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.projects-page .blog-post-card p {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-post-card {
  background-color: var(--bg-medium);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--box-shadow);
  border: 1px solid rgba(255, 255, 255, 0.04);
  transition: all var(--transition-speed);
  display: flex;
  flex-direction: column;
}

.blog-post-card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--box-shadow-hover);
  background-color: #242426;
}

.blog-post-date {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.blog-post-card h3 {
  margin-bottom: 0.5rem;
  font-size: 1.3rem;
}

.blog-post-card h3 a {
  color: var(--text-bright);
}

.blog-post-card h3 a:hover {
  color: var(--accent);
}

.blog-post-card p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.read-more {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--accent);
  transition: opacity 0.2s;
}
.read-more:hover {
  opacity: 0.8;
  color: var(--accent);
}

/* Footer */
footer {
  background-color: var(--bg-darkest);
  padding: 3rem 1rem;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 4rem;
}

footer p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 0;
}

/* Back to Top */
#backToTop {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--text-bright);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-speed);
  z-index: 100;
}

#backToTop.visible {
  opacity: 1;
  visibility: visible;
}

#backToTop:hover {
  background-color: var(--text-bright);
  color: var(--bg-darkest);
  transform: translateY(-3px);
}

/* Photo Gallery styles */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.photo-item {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--border-radius);
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--box-shadow);
  transition:
    transform var(--transition-speed),
    box-shadow var(--transition-speed);
  background-color: var(--bg-dark);
}

.photo-item:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--box-shadow-hover);
}

.photo-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity var(--transition-speed);
}

.photo-item:hover img {
  opacity: 0.85;
}

/* Full Screen Image Viewer */
#fullScreenImage {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}
#fullScreenImage img {
  max-width: 90vw;
  max-height: 90vh;
  box-shadow: var(--box-shadow);
  border-radius: 8px;
}

/* Forms */
input,
textarea {
  width: 100%;
  padding: 1rem;
  background-color: var(--bg-light);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  color: var(--text-primary);
  font-family: var(--font-body);
  transition: all var(--transition-speed);
}
input:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--focus-ring);
  background-color: var(--bg-medium);
}
label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}
.mb-3 {
  margin-bottom: 1.5rem;
}
form button[type='submit'] {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  background: var(--text-bright);
  color: var(--bg-darkest);
  padding: 0.8rem 1.5rem;
  border-radius: 980px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-speed);
}
form button[type='submit']:hover {
  background: var(--text-primary);
  transform: scale(1.02);
}

/* Code Blocks */
pre,
code {
  font-family: 'SF Mono', 'Menlo', monospace;
  background-color: #1e1e1e;
  border-radius: 12px;
  font-size: 0.9em;
}
pre {
  padding: 1.5rem;
  overflow-x: auto;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Tag Groups */
.tag-group {
  margin-bottom: 2rem;
}
.tag-group h3 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
}
.tag-group ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.tag-group ul li {
  background-color: rgba(255, 255, 255, 0.05);
  padding: 0.5rem 1rem;
  border-radius: 980px;
  font-size: 0.85rem;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Blog detail specific */
.blog-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.blog-tags a {
  background-color: rgba(255, 255, 255, 0.05);
  padding: 0.2rem 0.6rem;
  border-radius: 980px;
  font-size: 0.75rem;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  margin-right: 0.3rem;
}
.blog-tags a:hover {
  background-color: var(--accent);
  color: var(--bg-darkest);
  border-color: var(--accent);
}
.blog-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.blog-author {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.author-image {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
}
.author-info h3 {
  margin-bottom: 0.2rem;
  font-size: 1.1rem;
}
.author-info p {
  margin-bottom: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}
blockquote {
  border-left: 4px solid var(--accent);
  padding-left: 1.5rem;
  margin-left: 0;
  font-style: italic;
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* Focus */
*:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Responsive typography scaling */
@media (min-width: 800px) {
  h1 {
    font-size: 4rem;
  }
}
@media (max-width: 768px) {
  .header {
    padding: 2rem 0;
  }
  h1 {
    font-size: 2.5rem;
  }
  nav ul {
    gap: 1rem;
  }
  .sidebar {
    width: 100% !important;
    height: auto !important;
    position: relative !important;
    border-right: none !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    flex-direction: row !important;
    justify-content: space-between;
    align-items: center;
    padding: 1rem !important;
  }
  .sidebar ul {
    flex-direction: row !important;
    gap: 1rem !important;
  }
  .sidebar-header {
    margin-bottom: 0 !important;
  }
  .sidebar-header h2 {
    font-size: 1.5rem;
    margin: 0;
  }
  .main-content {
    margin-left: 0 !important;
    width: 100% !important;
  }
}

/* Single Page Layout & Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 150px;
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 3rem 1rem;
  z-index: 1000;
}
.sidebar-header {
  margin-bottom: 3rem;
}
.sidebar ul {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.main-content {
  margin-left: 150px;
  width: calc(100% - 150px);
}