/* Main CSS file with root variables and base styles */

:root {
  /* Common variables for all themes */
  --header-height: 70px;
  --footer-border-gradient: linear-gradient(90deg, 
    rgba(33, 150, 243, 0.1) 0%,
    rgba(33, 150, 243, 0.8) 50%,
    rgba(33, 150, 243, 0.1) 100%
  );
  --bs-primary: #2196F3; /* Blue accent color */
  --bs-primary-rgb: 33, 150, 243;
  --bs-primary-hover: #1976D2;
  
  /* Light Theme Colors - More grayscale */
  --light-bg-primary: #e8e8e8; /* Grayscale background */
  --light-bg-secondary: #d9d9d9; /* Slightly darker grayscale */
  --light-text-primary: #000000; /* Pure black text */
  --light-text-secondary: #333333; /* Dark gray secondary text */
  --light-muted: #666666; /* Medium gray for muted text */
  --light-border: rgba(0, 0, 0, 0.12);
  --light-card-bg: #f5f5f5;
  --light-card-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
  --light-hero-overlay: rgba(232, 232, 232, 0.7); /* Grayscale overlay */
  --light-navbar-bg: rgba(232, 232, 232, 0.98); /* Matching navbar to bg */
  --light-dropdown-bg: #f0f0f0;
  --light-footer-bg: #d9d9d9;
  
  /* Dark Theme Colors - Pure white text */
  --dark-bg-primary: #121212;
  --dark-bg-secondary: #1e1e1e;
  --dark-text-primary: #ffffff; /* Pure white text */
  --dark-text-secondary: #cccccc; /* Light gray secondary text */
  --dark-muted: #999999; /* Light gray for muted text */
  --dark-border: rgba(255, 255, 255, 0.1);
  --dark-card-bg: #1e1e1e;
  --dark-card-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.3);
  --dark-hero-overlay: rgba(18, 18, 18, 0.7);
  --dark-navbar-bg: rgba(18, 18, 18, 0.98);
  --dark-dropdown-bg: #212529;
  --dark-footer-bg: #121212;
  
  /* Font properties */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 600;
  --font-weight-extra: 700;
  --letter-spacing-normal: 0.015em;
  --line-height-relaxed: 1.6;
}

/* Enhanced theme application - immediate */
html.dark-theme,
html.dark-theme body,
body.dark-theme {
  --bg-primary: var(--dark-bg-primary);
  --bg-secondary: var(--dark-bg-secondary);
  --text-primary: var(--dark-text-primary);
  --text-secondary: var(--dark-text-secondary);
  --text-muted: var(--dark-muted);
  --border: var(--dark-border);
  --card-bg: var(--dark-card-bg);
  --card-shadow: var(--dark-card-shadow);
  --hero-overlay: var(--dark-hero-overlay);
  --navbar-bg: var(--dark-navbar-bg);
  --dropdown-bg: var(--dark-dropdown-bg);
  --footer-bg: var(--dark-footer-bg);
  
  background-color: #121212 !important;
  color: #ffffff !important;
  
  background-image: 
    radial-gradient(circle at 25% 10%, rgba(33, 150, 243, 0.08) 0%, transparent 50%), 
    radial-gradient(circle at 75% 75%, rgba(33, 150, 243, 0.08) 0%, transparent 50%);
}

/* Light Theme Applied */
html.light-theme,
html.light-theme body,
body.light-theme {
  --bg-primary: var(--light-bg-primary);
  --bg-secondary: var(--light-bg-secondary);
  --text-primary: var(--light-text-primary);
  --text-secondary: var(--light-text-secondary);
  --text-muted: var(--light-muted);
  --border: var(--light-border);
  --card-bg: var(--light-card-bg);
  --card-shadow: var(--light-card-shadow);
  --hero-overlay: var(--light-hero-overlay);
  --navbar-bg: var(--light-navbar-bg);
  --dropdown-bg: var(--light-dropdown-bg);
  --footer-bg: var(--light-footer-bg);
  
  background-color: #e8e8e8 !important;
  color: #000000 !important;
  
  background-image: 
    radial-gradient(circle at 25% 10%, rgba(33, 150, 243, 0.05) 0%, transparent 50%), 
    radial-gradient(circle at 75% 75%, rgba(33, 150, 243, 0.05) 0%, transparent 50%);
}

/* Base Body Styling - Enhanced for readability */
body {
  font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  overflow-x: hidden;
  padding-top: var(--header-height);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
  background-attachment: fixed;
  font-weight: var(--font-weight-normal);
  letter-spacing: var(--letter-spacing-normal);
  line-height: var(--line-height-relaxed);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Force SF Pro for all body content */
body,
p,
.lead,
.about-text,
.section,
.hero-subtitle,
.service-description,
.project-description,
.project-subtitle,
.project-highlights,
.team-role,
.team-bio,
.footer,
.footer-nav a,
.footer-email,
.footer-bottom p,
.btn,
.nav-link,
.dropdown-item,
.ongoing-stats,
.stat-label-small,
.approach-description,
.approach-text,
.contact-input,
.form-label,
.contact-person,
.contact-detail,
.social-btn,
.team-designation {
  font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif !important;
  font-weight: 400 !important;
}

/* Headings use Georgia */
h1, h2, h3, h4, h5, h6,
.section-heading,
.hero-title,
.hero .display-4,
.display-5,
.display-6,
.footer-motto,
.card-title,
.project-title h5,
.ongoing-projects-banner h3,
.service-title,
.approach-title,
.team-name,
.contact-form-title,
.contact-info-title,
.contact-section-title,
.step-number,
.step-number-enhanced {
  font-family: 'Georgia', serif !important;
  font-weight: 550 !important;
  letter-spacing: -0.01em;
}

/* Hero title should be slightly bolder for impact */
.hero-title,
.hero .display-4 {
  font-weight: 600 !important;
}

/* Specific font weights for emphasis */
.fw-bold,
.font-weight-bold {
  font-weight: 550 !important;
}

/* Navbar specific fonts - use SF Pro */
.navbar,
.navbar-nav,
.navbar-nav .nav-link,
.navbar-brand,
.navbar-toggler,
.navbar-brand-full {
  font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif !important;
  font-weight: 500 !important;
}

.navbar-brand-full,
.navbar-brand .navbar-brand-full {
  font-weight: 700 !important;
  letter-spacing: -0.01em;
}

/* Enhanced Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.015em; /* Improved letter spacing */
  line-height: 1.25; /* Better line height */
}

p {
  margin-bottom: 1rem;
  line-height: 1.65; /* Improved readability */
}

.lead {
  font-weight: var(--font-weight-normal);
  line-height: 1.7; /* Enhanced readability for lead text */
}

/* Fix form control colors in light theme */
body.light-theme .form-control {
  background-color: #ffffff;
  color: var(--text-primary);
  border-color: rgba(0, 0, 0, 0.2);
}

body.light-theme .form-control::placeholder {
  color: #6c757d;
}

body.light-theme .form-label {
  color: var(--text-primary);
}

body.light-theme .text-muted {
  color: var(--text-secondary) !important;
}

/* Fix card text colors in light mode */
body.light-theme .card-text {
  color: var(--text-secondary);
}

/* Fix for modal dialogs */
.modal-content {
  background-color: var(--card-bg);
  color: var(--text-primary);
  border-color: var(--border);
}

.modal-header {
  border-bottom-color: var(--border);
}

.modal-footer {
  border-top-color: var(--border);
}

/* Fix for code blocks to ensure proper theme colors */
pre, code {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: 0.25rem;
  padding: 0.125rem 0.25rem;
  font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

pre {
  padding: 1rem;
  margin-bottom: 1rem;
}

/* Custom scrollbar for improved UX */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: #888;
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: #666;
}

/* Make links inside articles more visible */
article a {
  color: var(--bs-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: color 0.2s ease;
}

article a:hover {
  color: var(--bs-primary-hover);
  text-decoration: underline;
}

/* Enhanced section heading styles */
.section-heading {
  position: relative;
  display: inline-block;
  font-weight: 700;
  margin-bottom: 2rem;
  padding-bottom: 0.75rem;
  color: var(--text-primary);
  letter-spacing: -0.02em; /* Improved spacing */
}

/* Light theme text adjustments */
body.light-theme .section-heading {
  color: #333333;
}

body.dark-theme .section-heading {
  color: #ffffff;
}

/* Better text contrast for both themes - ensure subtexts are white */
body.light-theme .service-description,
body.light-theme .approach-description,
body.light-theme .project-subtitle,
body.light-theme .project-highlights li,
body.light-theme .team-designation,
body.light-theme .contact-person,
body.light-theme .contact-detail,
body.light-theme .social-btn {
  color: #000000 !important; /* Black subtexts in light theme */
}

body.dark-theme .service-description,
body.dark-theme .approach-description,
body.dark-theme .project-subtitle,
body.dark-theme .project-highlights li,
body.dark-theme .team-designation,
body.dark-theme .contact-person,
body.dark-theme .contact-detail,
body.dark-theme .social-btn {
  color: #ffffff !important; /* White subtexts in dark theme */
}

/* Enhanced theme-aware styling for logo sections */
body.light-theme .alumni-section .section-heading,
body.light-theme .competitions-section .section-heading {
  color: #333333;
}

body.dark-theme .alumni-section .section-heading,
body.dark-theme .competitions-section .section-heading {
  color: #ffffff;
}

/* Additional utility classes for the about page */
.section-heading {
  position: relative;
  display: inline-block;
  font-weight: 700;
  margin-bottom: 2rem;
  padding-bottom: 0.75rem;
}

.section-heading:after {
  content: '';
  position: absolute;
  width: 60%;
  height: 3px;
  background: linear-gradient(to right, var(--bs-primary), rgba(33, 150, 243, 0.3));
  bottom: 0;
  left: 20%;
  border-radius: 2px;
}

.about-text {
  font-size: 1.15rem;
  line-height: 1.75; /* Better readability */
  color: var(--text-primary);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  font-weight: 400; /* Consistent font weight */
}

/* Remove any stats container styling in main.css */
body.light-theme .stats-container,
body.dark-theme .stats-container {
  background-color: transparent !important;
  border-radius: 0 !important;
  box-shadow: none !important;
}

/* Force white text in BITS Pilani section */
#about-bits-section h1,
#about-bits-section p,
#about-bits-section .lead {
  color: #ffffff !important;
}

/* Fix for anchor links being hidden behind fixed navbar */
#about-bits-section,
#about-bpcc-section {
  scroll-margin-top: 120px; /* Increased from 100px to account for navbar */
  padding-top: 2rem;
}

/* Alternative solution using pseudo-elements for older browsers */
#about-bits-section::before,
#about-bpcc-section::before {
  content: '';
  display: block;
  height: 120px; /* Same as scroll-margin-top */
  margin-top: -120px;
  visibility: hidden;
}