/* public/css/style.css */
/* ===== CSS VARIABLES ===== */
:root {
  /* Colors */
  --color-primary: #333;
  --color-primary-dark: #212529;
  --color-secondary: #666;
  --color-text: var(--color-primary);
  --color-text-light: #555;
  --color-text-lighter: #6c757d;
  --color-text-muted: #777;
  --color-background: #fff;
  --color-background-shaded: #f5f5f5;
  --color-box-shadow2: rgba(0, 0, 0, 0.1);
  --color-border: #eee;
  --color-border-light: #ddd;
  --color-border-lighter: #e0e0e0;
  --color-error: #ff3860;
  --color-error-dark: #721c24;
  --color-error-background: #f8d7da;
  --color-error-border: #f5c6cb;
  --color-success: #4CAF50;
  --color-success-dark: #45a049;
  --color-link-focus: #0066cc;
  --color-icon-bg: #e9ecef;
  --color-icon-text: #495057;

  /* Typography */
  --font-family-headings: "Helvetica", Arial;
  --font-family-base: "Avenir Light", Arial;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-xs: 0.8rem;
  --font-size-md: 0.95rem;
  --font-size-lg: 1.1rem;
  --font-size-xl: 1.2rem;
  --font-size-xxl: 1.3rem;
  --font-size-xxxl: 1.5rem;
  --font-size-display: 2rem;
  --font-size-display-lg: 2.2rem;
  --font-size-display-xl: 2.5rem;
  --line-height-base: 1.6;
  --line-height-relaxed: 1.8;

  /* Heading Font Sizes */
  --font-size-h1: 88px;
  --font-size-h2: 72px;
  --font-size-h3: 50px;
  --font-size-h4: 40px;
  --font-size-h5: 28px;
  --font-size-h6: 22px;

  /* Paragraph Font Sizes */
  --font-size-p1: 20px;
  --font-size-p2: 18px;
  --font-size-p3: 15px;

  /* Spacing */
  --spacing-xs: 5px;
  --spacing-sm: 10px;
  --spacing-md: 15px;
  --spacing-lg: 20px;
  --spacing-xl: 30px;
  --spacing-xxl: 40px;
  --spacing-xxxl: 50px;
  --spacing-section: 60px;

  /* Layout */
  --container-width: 85%;
  --container-max-width: 1200px;
  --container-padding: 0 15px;
  --input-width-medium: 250px;
  --border-radius-sm: 3px;
  --border-radius: 12px;
  --border-radius-lg: 8px;
  --border-radius-circle: 50%;
  --box-shadow: 0 2px 4px var(--color-box-shadow2);
  --box-shadow-lg: 0 4px 10px var(--color-box-shadow2);
  --padding: 1.25rem;

  /* Breakpoints */
  --breakpoint-md: 768px;

  /* Transitions */
  --transition-standard: 0.3s ease;
  --transition-fast: 0.2s ease;
}

/* ===== BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Heading Styles */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-headings), sans-serif;
  margin-bottom: var(--spacing-md);
  font-weight: normal;
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }
h4 { font-size: var(--font-size-h4); }
h5 { font-size: var(--font-size-h5); }
h6 { font-size: var(--font-size-h6); }

/* Paragraph Styles */
p {
  font-family: var(--font-family-base), sans-serif;
  font-size: var(--font-size-p3); /* Default paragraph size p3 */
  margin-bottom: var(--spacing-md);
}

/* Update body font */
body {
  font-family: var(--font-family-base), sans-serif;
  font-size: var(--font-size-p3); /* Body text uses p3 size */
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-background);
}

.container {
  width: var(--container-width);
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: var(--container-padding);
}

/* ===== HEADER STYLES ===== */
header {
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--color-border);
}

.site-title {
  display: inline-block;
  font-family: var(--font-family-headings), sans-serif;
  font-size: var(--font-size-h3); /* Using h3 size for site title */
  font-weight: 500;
  letter-spacing: 1px;
}

.site-title a {
  color: var(--color-text);
  text-decoration: none;
}

.search-container {
  float: right;
  margin-top: var(--spacing-sm);
}

.search-container input[type="text"] {
  padding: var(--spacing-xs) var(--spacing-md);
  width: var(--input-width-medium);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-sm);
  outline: none;
}

.search-container button {
  background: transparent;
  border: none;
  cursor: pointer;
}

/* Search Results Styling */
.search-result {
  margin-bottom: var(--padding);
  padding: var(--padding);
  border-radius: var(--border-radius-lg);
  background-color: var(--color-background-shaded);
  box-shadow: 0 2px 4px var(--color-box-shadow2);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.search-result:hover {
  transform: translateY(-2px);
  box-shadow: var(--box-shadow);
}

.search-result h5 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  color: var(--color-primary);
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.search-result a {
  text-decoration: none;
  color: var(--color-link-focus);
}

.search-result a:hover h5 {
  color: var(--color-link-focus);
  text-decoration: underline;
}

.search-result p {
  margin-bottom: 0;
  color: var(--color-primary);
  font-size: var(--font-size-md);
  line-height: var(--line-height-base);
}

/* No Results Message */
.no-results {
  padding: var(--padding);
  text-align: center;
  color: var(--color-secondary);
  font-style: italic;
  background-color: var(--color-background-shaded);
  border-radius: var(--border-radius-lg);
}

/* Error Message */
.error {
  padding: var(--spacing-sm);
  color: var(--color-error);
  background-color: var(--color-error-background);
  border: 1px solid var(--color-error-border);
  border-radius: var(--border-radius-lg);
  font-weight: 500;
}


/* ===== NAVIGATION STYLES ===== */
nav {
  padding: var(--spacing-md) 0;
  text-align: center;
}

.nav-menu {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
}

.nav-menu a {
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--font-size-md);
  transition: color var(--transition-fast);
}

.nav-menu li {
  margin: 0 var(--spacing-lg);
}

.nav-menu li a {
  font-family: var(--font-family-base), sans-serif; /* Avenir Light */
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--font-size-p3); /* p3 size for navigation */
  transition: color var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-link-focus);
}

/* ===== Mobile Navigation ===== */
.site-nav {
  position: sticky;
  top: 0;
  background-color: var(--color-background);
  z-index: 1000;
  transition: transform var(--transition-standard);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-xxxl);
  cursor: pointer;
  position: absolute;
  right: var(--spacing-md);
  top: var(--spacing-sm);
  z-index: 1010;
  color: var(--color-primary);
  padding: 5px;
}

.hamburger-icon {
  font-size: var(--font-size-xxxl);
  line-height: 1;
  display: block; /* Make sure the icon is displayed */
}

/* ===== HERO SECTION STYLES ===== */
.hero {
  padding: var(--spacing-xxxl) 0;
  text-align: center;
}

.profile-container {
  margin-bottom: var(--spacing-xl);
}

.profile-image {
  width: 250px;
  height: 250px;
  overflow: hidden;
  border-radius: var(--border-radius-circle);
  margin: 0 auto;
}

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

.intro {
  max-width: 800px;
  margin: 0 auto;
}

.intro h2 {
  font-size: var(--font-size-display-xl);
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
}

.intro h3 {
  font-size: var(--font-size-xxxl);
  margin-bottom: var(--spacing-lg);
  font-weight: normal;
}

.intro p {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-light);
}

/* ===== WORK EXPERIENCE SECTION STYLES ===== */
.jobs {
  margin-top: var(--spacing-section);
}

.jobs h2 {
  font-family: var(--font-family-headings), sans-serif; /* Helvetica */
  font-size: var(--font-size-h4); /* h4 for work jobs header */
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.subtitle {
  font-family: var(--font-family-base), sans-serif; /* Avenir Light */
  text-align: center;
  font-size: var(--font-size-p1); /* p1 for subtitle */
  margin-bottom: var(--spacing-sm);
}

.job-item {
  display: grid;
  grid-template-columns: 1fr 1fr 3fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xxxl);
}

.job-left h3 {
  font-family: var(--font-family-headings), sans-serif; /* Helvetica */
  font-size: var(--font-size-h6); /* h6 for job left */
}

.job-middle p {
  font-family: var(--font-family-base), sans-serif; /* Avenir Light */
  font-size: var(--font-size-p2); /* p2 for job middle */
}

.job-right ul {
  list-style-type: disc;
  padding-left: var(--spacing-lg);
}

.job-right li {
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-base);
}

.job-divider {
  width: 100%;
  height: 0;
  background-color: black;
  margin: 30px 0;
}

/* ===== RESEARCH PAGE STYLES ===== */
.research-header {
  font-family: var(--font-family-headings), sans-serif;
  font-size: var(--font-size-h4);
  text-align: center;
  margin-bottom: var(--spacing-xxxl);
}

.research-header h4 {
  font-family: var(--font-family-headings), sans-serif;
  font-size: var(--font-size-h4);
  margin-bottom: 0;
}

.research-header p {
  font-family: var(--font-family-base), sans-serif;
  font-size: var(--font-size-p3);
  display: block;
}

.research-topics {
  max-width: 1000px;
  margin: 0 auto;
}

.research-topic {
  display: grid;
  grid-template-columns: 1fr 2.5fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-section);
}

.topic-title h6 {
  font-family: var(--font-family-headings), sans-serif;
  font-size: var(--font-size-h6);
}

.topic-details ul {
  list-style-type: disc;
  padding-left: var(--spacing-lg);
}

.topic-details li {
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-base);
}

/* ===== PROJECT STYLES ===== */
.project-block {
  margin: 3rem 0;
}

.project-divider {
  width: 100%;
  height: 1px;
  background-color: var(--color-primary);
  margin: 30px 0;
}

.project-content {
  display: flex;
  align-items: center;
  gap: 2rem;
}

/* Explicitly set the direction based on class */
.left-aligned {
  flex-direction: row;
}

.right-aligned {
  flex-direction: row-reverse;
}

.project-image {
  flex: 1;
  max-width: 40%;
}

.project-image img {
  width: 100%;
  height: auto;
  max-height: 300px;
  object-fit: contain;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--box-shadow-lg);
}

.project-image a {
  display: block;
  transition: opacity var(--transition-standard);
}

.project-image a:hover {
  opacity: 0.9;
}

.project-image a:focus {
  outline: 3px solid var(--color-link-focus);
  outline-offset: 3px;
}

.project-text {
  flex: 1;
  padding: var(--spacing-sm);
  margin-bottom: 0;
}

/* ===== Resume PAGE STYLES ===== */
.resume-container {
  max-width: 1000px;
  margin: 2rem auto;
  padding: 0 var(--spacing-sm);
}

.pdf-viewer {
  width: 100%;
  height: 800px;
  border: 1px solid var(--color-border-lighter);
  box-shadow: var(--box-shadow);
  overflow: hidden;
  border-radius: var(--border-radius);
}

.pdf-viewer iframe {
  border: none;
}

.resume-actions {
  margin-bottom: var(--spacing-sm);
  text-align: center;
}

.download-button {
  display: inline-block;
  padding: 0.5rem 1rem;
  background-color: var(--color-success);
  color: white;
  text-decoration: none;
  border-radius: var(--border-radius);
  font-weight: bold;
  transition: background-color var(--transition-standard);
}

.download-button:hover {
  background-color: var(--color-success-dark);
}

/* ===== FOOTER STYLES ===== */
footer {
  padding: var(--spacing-lg) 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-xxxl);
  color: var(--color-text-muted);
}

.social-icons {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.social-icons a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-circle);
  background-color: var(--color-icon-bg);
  color: var(--color-icon-text);
  transition: all var(--transition-fast);
}

.social-icons a:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-background);
  transform: translateY(-3px);
}

.copyright {
  font-size: var(--font-size-sm);
  color: var(--color-text-lighter);
}

/* ===== RESPONSIVE STYLES ===== */
@media (max-width: 768px) {
  /* Header responsive */
  .site-title {
    font-size: var(--font-size-display);
    display: block;
    text-align: center;
  }

  .search-container {
    float: none;
    text-align: center;
    margin-top: var(--spacing-lg);
  }

  /* Navigation responsive */
  .menu-toggle {
    display: block;
  }

  /* Basic hamburger icon using spans */
  .hamburger-icon {
    position: relative;
    display: block;
    width: 24px;
    height: 18px;
  }

  .hamburger-icon:before,
  .hamburger-icon:after,
  .hamburger-icon span {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-primary);
    transition: all var(--transition-standard);
  }

  .hamburger-icon:before {
    top: 8px;
  }

  .hamburger-icon span {
    top: 8px;
  }

  .hamburger-icon:after {
    bottom: 0;
  }

  /* X animation when menu is active */
  .nav-menu.active + .menu-toggle .hamburger-icon:before,
  .menu-toggle.active .hamburger-icon:before {
    transform: translateY(8px) rotate(45deg);
  }

  .nav-menu.active + .menu-toggle .hamburger-icon span,
  .menu-toggle.active .hamburger-icon span {
    opacity: 0;
  }

  .nav-menu.active + .menu-toggle .hamburger-icon:after,
  .menu-toggle.active .hamburger-icon:after {
    transform: translateY(-8px) rotate(-45deg);
  }

  .nav-menu {
    flex-direction: column;
    position: fixed;
    right: -100%;
    width: 80%;
    max-width: 300px;
    background-color: var(--color-background);
    box-shadow: var(--box-shadow);
    transition: right var(--transition-standard);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-md);
    z-index: 1000;
  }

  .nav-menu.active {
    /*display: flex;*/
    right: 0;
  }

  .nav-menu li {
    margin: var(--spacing-xs) 0;
  }

  /* Ensure main content doesn't overlap with menu */
  main {
    position: relative;
    transition: transform var(--transition-standard);
  }

  body:has(.nav-menu.active) main {
    transform: translateX(-250px); /* Push content when menu is open */
  }

  /* Hero responsive */
  .profile-image {
    width: 180px;
    height: 180px;
  }

  /* Job responsive */
  .job-item {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }

  .job-left, .job-middle, .job-right {
    margin-bottom: var(--spacing-md);
  }

  /* Research responsive */
  .research-topic {
    grid-template-columns: 1fr;
    gap: var(--spacing-xs);
  }

  .topic-title {
    margin-bottom: var(--spacing-xs);
  }

  .research-header h2 {
    font-size: var(--font-size-display);
  }

  /* Projects responsive */
  .project-block .project-content {
    flex-direction: column;
    gap: 1.5rem;
  }

  .left-aligned, .right-aligned {
    flex-direction: column;
  }

  .project-image {
    max-width: 100%;
  }

  .project-text {
    width: 100%; /* Make text take full width */
  }

  /* resume page responsive */
  .pdf-viewer {
    height: 600px;
  }

  .search-result {
    padding: var(--font-size-base);
  }

  .search-result h5 {
    font-size: var(--font-size-lg);
  }

}