/* Modern Blue Theme: Professional blue palette with modern minimal styling */

/* Typography - Inter for body, Poppins for headings */
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Poppins:wght@500;600;700&display=swap");
@import url("https://fonts.googleapis.com/css?family=Source+Code+Pro:300,400,500,700");

/* ============================================
   CSS Custom Properties
   ============================================ */
:root {
  /* Primary Blues */
  --mb-primary-900: #0a2540;
  --mb-primary-700: #1a4971;
  --mb-primary-500: #2563eb;
  --mb-primary-400: #3b82f6;
  --mb-primary-300: #60a5fa;
  --mb-primary-200: #93c5fd;
  --mb-primary-100: #dbeafe;
  --mb-primary-50: #eff6ff;

  /* Neutrals */
  --mb-white: #ffffff;
  --mb-gray-50: #f8fafc;
  --mb-gray-100: #f1f5f9;
  --mb-gray-200: #e2e8f0;
  --mb-gray-400: #94a3b8;
  --mb-gray-600: #475569;
  --mb-gray-900: #0f172a;

  /* Shadows */
  --mb-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --mb-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --mb-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --mb-shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Transitions */
  --mb-transition-fast: 150ms ease;
  --mb-transition-base: 250ms ease;

  /* Bootstrap overrides */
  --bs-font-sans-serif: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --bs-link-color: var(--mb-primary-500);
  --bs-link-hover-color: var(--mb-primary-700);

  /* TechFolio theme variables */
  --tf-pill-bg: var(--mb-primary-500);
  --tf-icon-fill: var(--mb-primary-500);
  --tf-page-bg-color: var(--mb-white);
  --tf-footer-bg-color: var(--mb-gray-50);
  --tf-projects-bg-color: var(--mb-gray-50);
}

/* ============================================
   Base Styles
   ============================================ */
html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--mb-white);
  color: var(--mb-gray-900);
  line-height: 1.7;
}

a {
  text-decoration: none;
  color: var(--mb-primary-500);
  transition: color var(--mb-transition-fast);
}

a:hover {
  color: var(--mb-primary-700);
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Poppins', var(--bs-font-sans-serif);
  color: var(--mb-primary-900);
  font-weight: 600;
  letter-spacing: -0.025em;
}

.display-4 {
  font-weight: 700;
  color: var(--mb-primary-900);
}

.lead {
  color: var(--mb-gray-600);
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
  background: rgba(255, 255, 255, 0.95) !important;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--mb-shadow-sm);
  padding: 1rem 0;
  transition: all var(--mb-transition-base);
}

.navbar-brand {
  font-family: 'Poppins', var(--bs-font-sans-serif);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--mb-primary-900) !important;
  transition: color var(--mb-transition-fast);
}

.navbar-brand:hover {
  color: var(--mb-primary-500) !important;
}

.nav-link {
  color: var(--mb-gray-600) !important;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  position: relative;
  transition: color var(--mb-transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--mb-primary-500);
  transition: all var(--mb-transition-fast);
  transform: translateX(-50%);
}

.nav-link:hover {
  color: var(--mb-primary-500) !important;
}

.nav-link:hover::after {
  width: 80%;
}

/* ============================================
   Hero Section
   ============================================ */
.hero-section {
  background: linear-gradient(135deg, var(--mb-primary-50) 0%, var(--mb-white) 100%);
  padding: 4rem 0;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, var(--mb-primary-100) 0%, transparent 60%);
  opacity: 0.6;
  pointer-events: none;
}

/* Profile Image */
.rounded-circle {
  border: 4px solid var(--mb-white) !important;
  box-shadow: var(--mb-shadow-xl), 0 0 0 8px var(--mb-primary-100);
  transition: transform var(--mb-transition-base), box-shadow var(--mb-transition-base);
}

.rounded-circle:hover {
  transform: scale(1.03);
  box-shadow: var(--mb-shadow-xl), 0 0 0 12px var(--mb-primary-100);
}

/* Hero Typography Animation */
.hero-animate {
  animation: fadeInUp 0.6s ease-out both;
}

.hero-animate-1 { animation-delay: 0s; }
.hero-animate-2 { animation-delay: 0.1s; }
.hero-animate-3 { animation-delay: 0.2s; }
.hero-animate-4 { animation-delay: 0.3s; }
.hero-animate-5 { animation-delay: 0.4s; }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   Social Icons
   ============================================ */
.tf-social {
  display: inline-block;
  fill: var(--mb-primary-500);
  height: 1.5em;
  vertical-align: -0.1em;
  width: 1.5em;
  transition: all var(--mb-transition-fast);
}

.social-icon-wrapper {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--mb-white);
  box-shadow: var(--mb-shadow-md);
  transition: all var(--mb-transition-base);
}

.social-icon-wrapper:hover {
  background: var(--mb-primary-500);
  transform: translateY(-3px);
  box-shadow: var(--mb-shadow-lg);
}

.social-icon-wrapper:hover .tf-social {
  fill: var(--mb-white);
}

/* ============================================
   Cards
   ============================================ */
.card {
  border: 1px solid var(--mb-gray-200);
  border-radius: 12px;
  overflow: hidden;
  transition: all var(--mb-transition-base);
  background: var(--mb-white);
  box-shadow: var(--mb-shadow-sm);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--mb-shadow-lg);
  border-color: var(--mb-primary-200);
}

.card-body {
  padding: 1.5rem;
}

.card-title {
  font-family: 'Poppins', var(--bs-font-sans-serif);
  color: var(--mb-primary-900);
  font-weight: 600;
}

.card-text {
  color: var(--mb-gray-600);
  line-height: 1.7;
}

/* ============================================
   Badges / Pills
   ============================================ */
.badge.rounded-pill {
  background-color: var(--mb-primary-500) !important;
  font-weight: 500;
  padding: 0.4em 0.8em;
  transition: all var(--mb-transition-fast);
}

.badge.rounded-pill:hover {
  background-color: var(--mb-primary-700) !important;
  transform: scale(1.05);
}

/* Interest tags styling */
.interest-tag {
  display: inline-block;
  background: var(--mb-primary-100);
  color: var(--mb-primary-700);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  margin: 0.15rem;
  transition: all var(--mb-transition-fast);
}

.interest-tag:hover {
  background: var(--mb-primary-500);
  color: var(--mb-white);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  font-weight: 500;
  padding: 0.625rem 1.25rem;
  border-radius: 8px;
  transition: all var(--mb-transition-base);
}

.btn-outline-dark {
  color: var(--mb-primary-500);
  border-color: var(--mb-primary-500);
  background: transparent;
}

.btn-outline-dark:hover {
  color: var(--mb-white);
  background-color: var(--mb-primary-500);
  border-color: var(--mb-primary-500);
  transform: translateY(-2px);
  box-shadow: var(--mb-shadow-md);
}

/* ============================================
   Sections
   ============================================ */
#projects {
  background-color: var(--mb-gray-50);
  padding: 4rem 0;
}

#essays {
  padding: 4rem 0;
}

.section-title {
  font-family: 'Poppins', var(--bs-font-sans-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--mb-primary-900);
  margin-bottom: 2rem;
}

/* ============================================
   Footer
   ============================================ */
footer.navbar {
  background: var(--mb-gray-50) !important;
  border-top: 1px solid var(--mb-gray-200) !important;
  padding: 1.5rem 0;
}

footer .nav-link {
  color: var(--mb-gray-600) !important;
}

footer .nav-link:hover {
  color: var(--mb-primary-500) !important;
}

/* ============================================
   Utilities
   ============================================ */
.bg-gradient {
  background: linear-gradient(135deg, var(--mb-primary-50) 0%, var(--mb-white) 100%) !important;
}

hr {
  border-color: var(--mb-gray-200);
  opacity: 1;
}

/* Resume page enhancements */
.resume-section {
  padding: 1.5rem 0;
}

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 991.98px) {
  .rounded-circle {
    margin-bottom: 2rem;
  }

  .display-4 {
    font-size: 2rem;
  }
}

@media (max-width: 575.98px) {
  .social-icon-wrapper {
    width: 40px;
    height: 40px;
  }

  .display-4 {
    font-size: 1.75rem;
  }
}