@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,300;0,400;0,600;0,700;1,400;1,600&display=swap');

:root {
  /* Pastel Light Mode Palette */
  --bg-color: #fafcfc;
  --card-bg: #ffffff;
  --sidebar-bg: #e6f0ed;
  --border-color: #cbd5e1;
  --text-primary: #2d3748;
  --text-secondary: #4a5568;
  --accent-color: #a3c4bc; /* Soft mint green */
  --hover-bg: #d5eae3;     /* Stronger mint highlight */
  
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  --font-main: 'Inter', sans-serif;
  --transition-speed: 0.3s;
}

[data-theme="dark"] {
  --bg-color: #121619;
  --card-bg: #1c2227;
  --sidebar-bg: #232c32;
  --border-color: #2b363d;
  --text-primary: #e2e8f0;
  --text-secondary: #a0aec0;
  --accent-color: #a3c4bc;
  --hover-bg: #3b4952;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-primary);
  display: flex;
  min-height: 100vh;
  line-height: 1.6;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

/* Theme Toggle */
.theme-toggle {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 0.5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

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

/* Typography styles */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  font-weight: 700;
}

a, a:link, a:visited {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  position: relative;
  transition: color var(--transition-speed);
}
a:active, a:focus {
  color: var(--text-primary);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

/* 2-Column Desktop Layout */
.layout-container {
  display: flex;
  width: 100%;
}

.sidebar {
  width: 320px;
  background-color: var(--sidebar-bg);
  padding: var(--spacing-xl) 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  border-right: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.profile-container {
  text-align: center;
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.profile-circle {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  overflow: hidden;
  background-color: var(--bg-color);
  border: 4px solid var(--accent-color);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.profile-circle img, .profile-circle svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.profile-name {
  font-size: 1.5rem;
  letter-spacing: 0.5px;
  color: var(--text-primary);
}

.main-nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  gap: var(--spacing-sm);
}

.main-nav a {
  font-size: 1.25rem;
  padding: 4px 8px;
  width: auto;
  text-align: center;
  display: inline-block;
  z-index: 1;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  width: 100%;
  height: 6px;
  background-color: var(--accent-color);
  opacity: 0;
  z-index: -1;
  transition: opacity var(--transition-speed), height var(--transition-speed) ease;
}

.main-nav a:hover::after, .main-nav a.active::after {
  opacity: 0.4;
  height: 100%;
}

.main-nav a:hover, .main-nav a.active {
  color: var(--accent-color);
}

.social-links {
  margin-top: 1rem;
}

.social-links a {
  color: var(--text-secondary);
  transition: color var(--transition-speed), transform var(--transition-speed);
}

.social-links a::after {
  display: none; /* remove pastel underline highlight from icon links */
}

.social-links a:hover {
  color: var(--accent-color);
  transform: scale(1.15);
}

.content {
  flex: 1;
  padding: var(--spacing-xl) 5vw;
  max-width: 900px;
  margin: 0 auto;
}

/* Hover Highlight Effect for Content Links */
.content a {
  display: inline-block;
  z-index: 1;
}

/* Content generic lists */
.content ul, .content ol {
  padding-left: 1.5rem;
  margin-bottom: var(--spacing-md);
}

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

.content a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  width: 100%;
  height: 6px;
  background-color: var(--accent-color);
  opacity: 0.4;
  z-index: -1;
  transition: height var(--transition-speed) ease;
}

.content a:hover::after {
  height: 100%;
  opacity: 0.6;
}

.content a.gumroad-button::after {
  display: none !important;
}

/* Lists styling for blogs */
.post-list {
  list-style: none;
  padding-left: 0;
}

.post-list li {
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05); /* Slight shadow to differentiate from dark bg */
  transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
}

.post-list li:hover {
  background-color: var(--sidebar-bg); /* subtle color shift */
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
}

.post-list a {
  font-size: 1.2rem;
}

.post-list a::after {
  background-color: var(--hover-bg);
}

/* About Page Specific Styles */
.section-heading {
  margin-top: 3rem;
  border-bottom: 2px solid rgba(163, 196, 188, 0.4); /* 40% opacity version of var(--accent-color) */
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
}

.achievements-list {
  padding-left: 1.5rem;
  margin-bottom: 2rem;
  color: var(--text-secondary);
}
.achievements-list li {
  margin-bottom: 0.5rem;
}

.experience-card, .education-card {
  display: flex;
  gap: 2rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap; /* allow responsive wrapping */
}

.experience-meta {
  flex: 0 0 200px; /* fixed width for the left column (Logo + Company text) */
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.company-logo {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  flex-shrink: 0;
  object-fit: cover;
}

.meta-text {
  display: flex;
  flex-direction: column;
}

.meta-text strong {
  color: var(--text-primary);
  font-size: 1.1rem;
}

.meta-text .tenure {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.experience-details {
  flex: 1;
  min-width: 300px; /* forces column wrap cleanly onto a new row on mobile */
}

.experience-details h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  font-size: 1.3rem;
}

.experience-details ul {
  padding-left: 1.2rem;
}

.experience-details li {
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

/* Mobile Responsiveness */
@media screen and (max-width: 768px) {
  body {
    flex-direction: column;
  }
  
  .layout-container {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
    padding: var(--spacing-md);
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
  }
  
  .profile-container {
    margin-bottom: var(--spacing-sm);
  }

  .social-links {
    margin-top: 0.5rem;
  }
  
  .profile-circle {
    width: 100px;
    height: 100px;
    border-width: 3px;
  }
  
  .main-nav {
    flex-direction: row;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap; /* allow wrapping instead of awkward pushing if tight */
  }
  
  .main-nav a {
    font-size: 1.1rem;
    padding: 4px 6px;
  }
  
  .content {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  /* Adjust experience & education layout for mobile */
  .experience-card, .education-card {
    gap: 1rem;
  }
  
  .experience-meta {
    flex: 1 1 100%;
  }
}