/* CSS Variables for Light/Dark Theme */
:root {
  /* Light Mode (Default) */
  --bg-color: #ffffff;
  --text-color: #111827;
  --text-muted: #6b7280;
  --text-description: #374151;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --card-bg: #f9fafb;
  --border-color: #e5e7eb;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --header-bg: rgba(255, 255, 255, 0.85);
}

/* Dark Mode */
[data-theme="dark"] {
  --bg-color: #0f172a;
  --text-color: #f8fafc;
  --text-muted: #94a3b8;
  --text-description: #cbd5e1;
  --primary: #60a5fa;
  --primary-hover: #3b82f6;
  --card-bg: #1e293b;
  --border-color: #334155;
  --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.15);
  --header-bg: rgba(15, 23, 42, 0.85);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.7;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.site-container {
  max-width: 1144px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

body > header {
  padding: 1.5rem 0;
  margin-bottom: 3rem;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav .logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-color);
}

nav ul {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  align-items: center;
}

nav ul li a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
}

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

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s, color 0.2s;
}

.theme-toggle:hover {
  background-color: var(--card-bg);
  color: var(--text-color);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* Hide icons based on theme */
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="light"] .icon-moon { display: block; }
[data-theme="light"] .icon-sun { display: none; }

/* Sections & Typography */
.hero {
  padding: 3rem 0 2rem;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 850px;
  margin-bottom: 2rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-color);
}

/* Cards / Minimalist List Items */
.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.3s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--primary);
}

.tag {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 9999px;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-right: 0.4rem;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

/* Mac-style Code Window */
.mac-window {
  background: #1e1e1e;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  border: 1px solid var(--border-color);
}
.mac-header {
  background: #2d2d2d;
  padding: 0.6rem 1rem;
  display: flex;
  gap: 0.4rem;
  align-items: center;
}
.mac-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.mac-dot.red { background: #ff5f56; }
.mac-dot.yellow { background: #ffbd2e; }
.mac-dot.green { background: #27c93f; }
.mac-window pre {
  margin: 0 !important;
  border: none !important;
  border-radius: 0 !important;
  background: transparent !important;
  padding: 1.25rem !important;
}
.mac-window code {
  color: #abb2bf;
}

.post-item {
  padding: 1.5rem 1rem;
  margin: 0 -1rem;
  border-radius: 8px;
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.3s ease, border-color 0.3s ease, opacity 0.3s ease, transform 0.3s ease;
}

.post-item:last-child {
  border-bottom: none;
}

/* Sibling fade effect on hover */
.post-list:hover .post-item {
  opacity: 0.55;
}

.post-list .post-item:hover {
  opacity: 1;
  background-color: var(--card-bg);
  border-bottom-color: transparent;
}

.post-item-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.post-item h2 {
  font-size: 1.25rem;
  font-weight: 600;
}

.post-item p {
  color: var(--text-description);
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

footer {
  margin-top: 5rem;
  padding: 2rem 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border-color);
  transition: border-color 0.3s ease;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }
  .hero p {
    font-size: 1rem;
  }
  .section-title {
    font-size: 1.25rem;
  }
  nav {
    flex-direction: column;
    gap: 1rem;
  }
  nav ul {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }
  .card {
    padding: 1.25rem 1rem !important;
  }
  .post-item-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
  .blog-content h1 {
    font-size: 2rem !important;
  }
  .blog-content h2 {
    font-size: 1.3rem !important;
  }
  .post-header {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }
  .post-date {
    text-align: left;
  }
}

/* Shared Content Typography (Blog & Projects) */
.blog-content h2, .project-content h2 { margin-top: 2.5rem; margin-bottom: 1rem; color: var(--text-color); font-size: 1.5rem; }
.blog-content h3, .project-content h3 { margin-top: 2rem; margin-bottom: 0.75rem; color: var(--text-color); font-size: 1.25rem; }
.blog-content h4, .project-content h4 { margin-top: 1.5rem; margin-bottom: 0.5rem; color: var(--text-color); font-size: 1.1rem; }
.blog-content p, .project-content p { margin-bottom: 1.5rem; line-height: 1.8; }
.blog-content ul, .project-content ul, .blog-content ol, .project-content ol { margin-bottom: 1.5rem; padding-left: 1.5rem; }
.blog-content li, .project-content li { margin-bottom: 0.5rem; }
.blog-content a, .project-content a { color: var(--primary); text-decoration: underline; }
.blog-content pre, .project-content pre { background: var(--card-bg); padding: 1rem; border-radius: 8px; overflow-x: auto; margin-bottom: 1.5rem; border: 1px solid var(--border-color); }
.blog-content code, .project-content code { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 0.9em; }

/* Inline Code Element Styling */
.blog-content :not(pre) > code, 
.project-content :not(pre) > code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9em;
  font-weight: 600;
  background-color: rgba(100, 116, 139, 0.08);
  color: #334155;
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  word-break: break-word;
}

[data-theme="dark"] .blog-content :not(pre) > code,
[data-theme="dark"] .project-content :not(pre) > code {
  background-color: rgba(148, 163, 184, 0.12);
  color: #cbd5e1;
}
.blog-content blockquote, .project-content blockquote { border-left: 4px solid var(--primary); padding-left: 1rem; margin-left: 0; color: var(--text-muted); font-style: italic; margin-bottom: 1.5rem; }

/* Reusable UI Components */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  color: var(--text-muted);
  font-weight: 500;
  text-decoration: none;
}
.post-header {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 0.5rem 1rem;
  margin-bottom: 2.25rem;
}
.post-title-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.post-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-color);
  line-height: 1.2;
}
.post-subtitle {
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text-muted);
  margin: 0;
}
.post-date {
  color: var(--text-muted);
  font-size: 0.95rem;
  text-align: right;
}

/* Blog & Project Index Items */
.post-item h2 { color: var(--text-color); }
.post-item time { color: var(--text-muted); font-size: 0.9rem; }
.post-item p { color: var(--text-description); }
.post-item .tag-container { margin-bottom: 1rem; }
.post-item a.read-more { color: var(--primary); font-weight: 500; font-size: 0.9rem; }
.post-list { list-style: none; display: flex; flex-direction: column; }
.project-list { display: flex; flex-direction: column; gap: 1.5rem; }

/* Content Elements */
.content-divider { margin: 2rem 0; border: none; border-top: 1px solid var(--border-color); }
.section-heading { margin-top: 3rem; border-top: 1px solid var(--border-color); padding-top: 1.5rem; }
.caption-text { font-size: 0.85rem; color: var(--text-muted); font-style: italic; }
.figure-container { text-align: center; margin: 2rem 0; }
.primary-button { display: inline-block; padding: 0.5rem 1rem; background-color: var(--primary); color: white; border-radius: 6px; font-weight: 500; text-decoration: none; }
.project-hero-title { font-size: 2.5rem; font-weight: 700; margin-bottom: 0.5rem; line-height: 1.2; }
.project-hero-desc { color: var(--text-muted); font-size: 1.15rem; margin-bottom: 1.5rem; }
.action-buttons { display: flex; gap: 1rem; }

/* Slide Components */
.tag-row { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.5rem; grid-column: 1 / span 2; }
.pill-tag { padding: 0.2rem 0.6rem; border-radius: 12px; font-size: 0.8rem; font-weight: 600; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; }
.pill-fintech { background-color: rgba(37, 99, 235, 0.08); color: #1e40af; }
.pill-realestate { background-color: rgba(190, 24, 93, 0.08); color: #9d174d; }
.pill-media { background-color: rgba(194, 65, 12, 0.08); color: #9a3412; }
[data-theme="dark"] .pill-fintech { background-color: rgba(59, 130, 246, 0.15); color: #93bbfd; }
[data-theme="dark"] .pill-realestate { background-color: rgba(236, 72, 153, 0.15); color: #f9a8d4; }
[data-theme="dark"] .pill-media { background-color: rgba(249, 115, 22, 0.15); color: #fdba74; }

.metrics-container { display: flex; gap: 2rem; margin: 2rem 0; align-items: center; border-bottom: 1px solid var(--border-color); padding-bottom: 1.5rem; }
.metric-box { display: flex; flex-direction: column; }
.metric-value { font-size: 2.5rem; font-weight: 800; color: #1e1b4b; line-height: 1; margin-bottom: 0.25rem; }
[data-theme="dark"] .metric-value { color: #a5b4fc; }
.metric-label { font-size: 0.75rem; font-weight: 700; color: var(--text-muted); letter-spacing: 0.05em; text-transform: uppercase; }

.competency-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-top: 1rem; }
@media (max-width: 768px) {
  .competency-grid { grid-template-columns: 1fr; }
}

.three-column-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1.5rem;
  margin-top: 1rem;
}
@media (max-width: 992px) {
  .three-column-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .three-column-grid { grid-template-columns: 1fr; }
}
.competency-card { background: var(--card-bg); padding: 1.5rem; border-radius: 8px; border: 1px solid var(--border-color); box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06); }
.competency-card.border-purple { border-top: 3px solid #4338ca; }
.competency-card.border-green { border-top: 3px solid #047857; }
.competency-card.border-orange { border-top: 3px solid #c2410c; }
.competency-card.border-blue { border-top: 3px solid #1d4ed8; }
.competency-card h3 { font-size: 0.9rem; color: var(--text-color); margin-bottom: 0.5rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; display: flex; align-items: center; gap: 0.5rem; }
.competency-card p { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 0; line-height: 1.6; }

/* About / Background Section */
.about-section { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--border-color); }
.experience-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 1rem; color: var(--text-muted); font-size: 1rem; line-height: 1.7; }
.experience-list li { padding-left: 1rem; border-left: 2px solid var(--border-color); }
.experience-list li strong { color: var(--text-color); }

/* Contact Section */
.contact-section { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--border-color); }
.contact-desc { color: var(--text-muted); font-size: 1rem; margin-bottom: 1.5rem; }
.social-links { display: flex; gap: 1rem; flex-wrap: wrap; }
.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.2s, color 0.2s, background-color 0.2s;
}
.social-link:hover {
  border-color: var(--primary);
  color: var(--primary);
  background-color: var(--card-bg);
}
.social-link svg { flex-shrink: 0; }

/* Reusable Responsive Table Styles */
.table-container {
  overflow-x: auto;
  margin-bottom: 2rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
}
.table-container table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 0;
  font-size: 0.95rem;
}
.blog-content th, .project-content th {
  background-color: var(--card-bg);
  color: var(--text-color);
  font-weight: 600;
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 2px solid var(--border-color);
}
.blog-content td, .project-content td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-muted);
}
.blog-content tr:hover td, .project-content tr:hover td {
  color: var(--text-color);
  background-color: rgba(0, 0, 0, 0.015);
}
[data-theme="dark"] .blog-content tr:hover td, 
[data-theme="dark"] .project-content tr:hover td {
  background-color: rgba(255, 255, 255, 0.015);
}
.blog-content td strong, .project-content td strong {
  color: var(--text-color);
}

/* Content Slider Component */
.slider-container {
  position: relative;
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background-color: var(--card-bg);
  margin: 2rem 0;
  box-shadow: var(--shadow);
}
.slider-wrapper {
  display: flex;
  transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
  width: 100%;
}
.slide {
  flex: 0 0 100%;
  width: 100%;
  padding: 2.25rem 2rem;
  box-sizing: border-box;
}
.slide-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.slide-content {
  color: var(--text-description);
  font-size: 1.05rem;
  line-height: 1.7;
}
.slider-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  border-top: 1px solid var(--border-color);
  background-color: rgba(0, 0, 0, 0.015);
}
[data-theme="dark"] .slider-nav {
  background-color: rgba(255, 255, 255, 0.015);
}
.slider-btn {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-color);
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s ease;
}
.slider-btn:hover {
  background-color: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.slider-dots {
  display: flex;
  gap: 0.5rem;
}
.slider-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--border-color);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background-color 0.2s ease, transform 0.2s ease;
}
.slider-dot.active {
  background-color: var(--primary);
  transform: scale(1.2);
}

/* TOC Container Component */
.toc-container {
  margin-bottom: 2.5rem;
}
.toc-container ol {
  list-style-type: decimal !important;
  padding-left: 1.5rem !important;
  margin-bottom: 0 !important;
}
.toc-container li {
  margin-bottom: 0.75rem !important;
}
.toc-container li::marker {
  color: var(--primary);
  font-weight: bold;
}
.toc-container a {
  font-weight: 500;
  color: var(--text-color);
  text-decoration: none !important;
  transition: color 0.2s ease;
}
.toc-container a:hover {
  color: var(--primary) !important;
}