/* --- Base Reset & Theme Variables --- */
:root {
  --bg-primary: #0f172a; /* Slate 900 */
  --bg-secondary: #1e293b; /* Slate 800 */
  --bg-card: rgba(30, 41, 59, 0.7);
  --border-color: #334155; /* Slate 700 */
  --border-focus: #6366f1; /* Indigo 500 */
  --text-primary: #f8fafc; /* Slate 50 */
  --text-secondary: #94a3b8; /* Slate 400 */
  --text-muted: #64748b; /* Slate 500 */
  --accent-primary: #6366f1; /* Indigo 500 */
  --accent-secondary: #14b8a6; /* Teal 500 */
  --accent-hover: #4f46e5;
  --accent-soft: rgba(99, 102, 241, 0.1);
  --success: #10b981;
  --font-sans: "Segoe UI", Arial, sans-serif;
  --font-display: "Arial Narrow", "Avenir Next Condensed", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --max-width: 1100px;
  --max-width-article: 760px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-medium: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Layout Structure --- */
.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem 1.5rem;
}

/* --- Navigation & Header --- */
.site-header {
  border-bottom: 1px solid var(--border-color);
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo {
  text-decoration: none;
  display: flex;
  flex-direction: column;
  transition: opacity var(--transition-fast);
}

.site-logo:hover {
  opacity: 0.9;
}

.logo-bold {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--text-primary);
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, #fff 0%, var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-sub {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-top: -0.2rem;
}

.desktop-nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.desktop-nav a {
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--transition-fast);
}

.desktop-nav a:hover,
.desktop-nav a.active {
  color: var(--text-primary);
}

.desktop-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-primary);
  transition: width var(--transition-fast);
}

.desktop-nav a:hover::after,
.desktop-nav a.active::after {
  width: 100%;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.btn-secondary {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--border-color);
  transform: translateY(-2px);
}

.btn-block {
  display: flex;
  width: 100%;
}

/* --- Badges & Micro-Components --- */
.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.75rem;
  background-color: var(--accent-soft);
  color: var(--accent-primary);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 9999px;
  margin-bottom: 1rem;
}

/* --- Homepage Layout --- */
.homepage-container {
  display: flex;
  flex-direction: column;
  gap: 5rem;
}

.hero-section {
  padding: 2.5rem 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 4rem;
  align-items: center;
}

.hero-title {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  background: linear-gradient(to right, #ffffff, #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  gap: 1rem;
}

.hero-avatar-card {
  perspective: 1000px;
}

.avatar-glass {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  backdrop-filter: blur(12px);
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  transition: transform var(--transition-medium);
}

.avatar-glass:hover {
  transform: translateY(-5px) rotateY(2deg);
}

.avatar-icon {
  width: 90px;
  height: 90px;
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  border-radius: 50%;
  margin: 0 auto 1.5rem auto;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

.avatar-glass h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.avatar-title {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
}

.operator-meta {
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.meta-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}

.meta-label {
  color: var(--text-muted);
}

.meta-val {
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

/* --- Notes Listing Section --- */
.section-header {
  margin-bottom: 3rem;
  border-left: 3px solid var(--accent-secondary);
  padding-left: 1.5rem;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.note-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-medium);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.note-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-focus);
  box-shadow: 0 12px 30px rgba(99, 102, 241, 0.15);
}

.note-image {
  height: 180px;
  position: relative;
  overflow: hidden;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.note-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-medium);
}

.note-card:hover .note-image img {
  transform: scale(1.05);
}

.note-content {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.note-meta {
  display: flex;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.note-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.75rem;
}

.note-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.note-title a:hover {
  color: var(--accent-secondary);
}

.note-summary {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.note-link {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* --- Single Article View --- */
.single-article-container {
  max-width: var(--max-width-article);
  margin: 0 auto;
  padding: 2rem 0;
}

.article-header {
  margin-bottom: 2.5rem;
}

.article-meta {
  display: flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.meta-separator {
  margin: 0 0.5rem;
}

.article-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.article-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  font-weight: 300;
  line-height: 1.4;
}

.article-featured-image {
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 2.5rem;
  border: 1px solid var(--border-color);
  aspect-ratio: 16 / 9;
}

.article-featured-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.75;
  color: #e2e8f0;
}

.article-content p {
  margin-bottom: 1.5rem;
}

.article-content h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem 0;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.article-content h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 2rem 0 0.75rem 0;
  color: var(--text-primary);
}

.article-content ul,
.article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content a {
  color: var(--accent-secondary);
  text-decoration: underline;
  transition: color var(--transition-fast);
}

.article-content a:hover {
  color: var(--accent-primary);
}

.article-content blockquote {
  border-left: 4px solid var(--accent-primary);
  padding: 0.5rem 0 0.5rem 1.5rem;
  margin: 1.5rem 0;
  color: var(--text-secondary);
  font-style: italic;
  background-color: var(--bg-secondary);
  border-radius: 0 8px 8px 0;
}

.article-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.back-link {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.back-link:hover {
  color: var(--text-primary);
}

/* --- List/Section View Layout --- */
.list-container {
  padding: 2rem 0;
}

.list-header {
  margin-bottom: 4rem;
  text-align: center;
}

.list-title {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.list-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  font-weight: 300;
}

/* --- General Pages Layout --- */
.page-container {
  padding: 2rem 0;
}

.page-header {
  margin-bottom: 3rem;
}

.page-title {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.page-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
}

/* --- Contact Page Grid & Form --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: start;
}

.contact-info h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.contact-info p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.info-block {
  margin-bottom: 1.5rem;
}

.info-block strong {
  display: block;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.info-block p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

.contact-form-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2.5rem;
  border-radius: 12px;
  backdrop-filter: blur(12px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.styled-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
}

/* --- About Page Grid --- */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 4rem;
  align-items: start;
}

.about-sidebar {
  position: sticky;
  top: 6rem;
}

.sidebar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.sidebar-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.profile-details {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.profile-details li {
  font-size: 0.95rem;
  display: flex;
  flex-direction: column;
}

.profile-details strong {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.15rem;
}

/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--border-color);
  background-color: #0b0f19;
  padding: 4rem 1.5rem;
  margin-top: auto;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.footer-tagline {
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 450px;
}

.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--text-primary);
}

/* --- Responsive Adjustments --- */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .hero-avatar-card {
    max-width: 400px;
    margin: 0 auto;
    width: 100%;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .about-sidebar {
    position: static;
  }
}

@media (max-width: 600px) {
  .hero-title {
    font-size: 2.25rem;
  }

  .header-container {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .desktop-nav ul {
    gap: 1.25rem;
  }

  .footer-container {
    flex-direction: column;
    gap: 2rem;
    text-align: center;
  }

  .footer-tagline {
    margin: 0 auto;
  }

  .footer-links {
    width: 100%;
  }

  .footer-links ul {
    flex-direction: row;
    justify-content: center;
    gap: 1.5rem;
  }
}