/* ===============================
   CUSTOM CSS VARIABLES & THEMES
   =============================== */

:root {
  /* Light theme colors */
  --bs-primary: #6366f1;
  --bs-primary-rgb: 99, 102, 241;
  --bs-secondary: #64748b;
  --bs-success: #10b981;
  --bs-danger: #ef4444;
  --bs-warning: #f59e0b;
  --bs-info: #06b6d4;
  
  /* Custom colors */
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  --gradient-secondary: linear-gradient(135deg, #64748b 0%, #475569 100%);
  --glass-bg: rgba(255, 255, 255, 0.15);
  --glass-border: rgba(255, 255, 255, 0.3);
  --backdrop-blur: blur(20px);
  --shadow-light: 0 4px 20px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 8px 30px rgba(0, 0, 0, 0.15);
  --shadow-heavy: 0 15px 50px rgba(0, 0, 0, 0.2);
  
  /* Animation variables */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  --transition-slow: 0.5s ease;
}

[data-bs-theme="dark"] {
  --bs-primary: #818cf8;
  --bs-primary-rgb: 129, 140, 248;
  --bs-secondary: #94a3b8;
  --bs-success: #34d399;
  --glass-bg: rgba(0, 0, 0, 0.25);
  --glass-border: rgba(255, 255, 255, 0.15);
}

/* ===============================
   GLOBAL STYLES
   =============================== */

* {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

.font-code {
  font-family: 'Fira Code', monospace;
}

/* ===============================
   ANIMATED BACKGROUND
   =============================== */

#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  opacity: 0.6;
}

/* ===============================
   NAVIGATION
   =============================== */

.navbar {
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  transition: all var(--transition-medium);
  padding: 1rem 0;
}

.bg-blur {
  background: var(--glass-bg) !important;
  border-bottom: 1px solid var(--glass-border);
}

.navbar-brand {
  font-size: 1.5rem;
  transition: all var(--transition-fast);
}

.navbar-brand:hover {
  transform: scale(1.05);
}

.nav-link {
  font-weight: 500;
  margin: 0 0.5rem;
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--bs-primary);
  transition: all var(--transition-fast);
  transform: translateX(-50%);
}

.nav-link:hover::after {
  width: 100%;
}

/* ===============================
   HERO SECTION
   =============================== */

.hero-section {
  position: relative;
  padding-top: 100px;
}

.hero-content {
  animation: fadeInUp 1s ease;
}

.avatar-container {
  position: relative;
  display: inline-block;
}

.avatar-placeholder {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: white;
  margin: 0 auto;
  box-shadow: var(--shadow-medium);
  transition: all var(--transition-medium);
}

.avatar-placeholder:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-heavy);
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===============================
   GLASS CARDS & COMPONENTS
   =============================== */

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  box-shadow: var(--shadow-light);
  transition: all var(--transition-medium);
}

.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-medium);
}

.bg-section {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border-top: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
}

/* ===============================
   SECTION STYLING
   =============================== */

.section-header h2 {
  position: relative;
  margin-bottom: 1rem;
}

.divider {
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
  margin: 1rem auto 2rem;
}

/* ===============================
   SKILLS SECTION
   =============================== */

.skill-card {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  padding: 2rem 1.5rem;
  text-align: center;
  height: 100%;
  transition: all var(--transition-medium);
}

.skill-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-medium);
}

.skill-icon {
  font-size: 3rem;
  color: var(--bs-primary);
  margin-bottom: 1rem;
  transition: all var(--transition-medium);
}

.skill-card:hover .skill-icon {
  transform: scale(1.1);
  color: var(--bs-success);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 1rem;
}

.skill-tag {
  background: var(--bs-primary);
  color: white;
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.skill-tag:hover {
  background: var(--bs-success);
  transform: scale(1.05);
}

/* ===============================
   PROJECTS SECTION
   =============================== */

.project-card {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  padding: 2rem;
  height: 100%;
  transition: all var(--transition-medium);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: all var(--transition-slow);
}

.project-card:hover::before {
  left: 100%;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-medium);
}

.project-icon {
  font-size: 2.5rem;
  color: var(--bs-primary);
  margin-bottom: 1rem;
  transition: all var(--transition-medium);
}

.project-card:hover .project-icon {
  color: var(--bs-success);
  transform: scale(1.1);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.project-tag {
  background: var(--bs-secondary);
  color: white;
  padding: 0.3rem 0.6rem;
  border-radius: 15px;
  font-size: 0.75rem;
  transition: all var(--transition-fast);
}

.project-tag:hover {
  background: var(--bs-primary);
  transform: scale(1.05);
}

/* ===============================
   CONTACT SECTION
   =============================== */

.contact-card {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  padding: 2rem;
  text-align: center;
  transition: all var(--transition-medium);
}

.contact-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-medium);
}

.contact-icon {
  font-size: 2.5rem;
  color: var(--bs-primary);
  margin-bottom: 1rem;
  transition: all var(--transition-medium);
}

.contact-card:hover .contact-icon {
  color: var(--bs-success);
  transform: scale(1.1);
}

.contact-link {
  color: var(--bs-primary);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.contact-link:hover {
  color: var(--bs-success);
  text-decoration: underline;
}

/* ===============================
   CHATBOT STYLING
   =============================== */

.chatbot-fab {
  position: fixed !important;
  bottom: 2rem !important;
  right: 2rem !important;
  left: auto !important;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  font-size: 1.5rem;
  z-index: 1040;
  box-shadow: var(--shadow-medium);
  transition: all var(--transition-medium);
  animation: pulse 2s infinite;
}


.chatbot-fab:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-heavy);
}

.chatbot-modal-content {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  box-shadow: var(--shadow-heavy);
}

.chatbot-header {
  background: var(--gradient-primary);
  border-radius: 20px 20px 0 0;
  color: white;
  padding: 1.5rem;
}

.chatbot-body {
  padding: 1rem;
  height: calc(100dvh - 150px);
  display: flex;
  flex-direction: column;
}

.chat-log {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
  background: rgba(var(--bs-body-bg-rgb), 0.3);
  border-radius: 10px;
  margin-bottom: 0.5rem;
  scrollbar-width: thin;
}

.chat-log::-webkit-scrollbar {
  width: 6px;
}

.chat-log::-webkit-scrollbar-track {
  background: transparent;
}

.chat-log::-webkit-scrollbar-thumb {
  background: var(--bs-primary);
  border-radius: 3px;
}

.chat-message {
  display: flex;
  margin-bottom: 1rem;
  animation: slideIn 0.3s ease;
}

.chat-message.user {
  justify-content: flex-end;
}

.chat-message.bot {
  justify-content: flex-start;
}

.chat-bubble {
  max-width: 80%;
  padding: 0.8rem 1.2rem;
  border-radius: 20px;
  position: relative;
  word-wrap: break-word;
}

.chat-message.user .chat-bubble {
  background: var(--bs-primary);
  color: white;
  border-bottom-right-radius: 5px;
}

.chat-message.bot .chat-bubble {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-bottom-left-radius: 5px;
}

/* ===============================
   ANIMATIONS
   =============================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(var(--bs-primary-rgb), 0.7);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(var(--bs-primary-rgb), 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(var(--bs-primary-rgb), 0);
  }
}

/* ===============================
   RESPONSIVE DESIGN
   =============================== */

@media (max-width: 768px) {
  .hero-section {
    padding-top: 80px;
  }
  
  .display-4 {
    font-size: 2.5rem;
  }
  
  .display-5 {
    font-size: 2rem;
  }
  
  .skill-card,
  .project-card,
  .contact-card {
    padding: 1.5rem;
  }
  
  .chatbot-fab {
    bottom: 1rem;
    right: 1rem;
    width: 50px;
    height: 50px;
    font-size: 1.25rem;
  }
  
  .modal-lg {
    max-width: 95%;
  }
  
  .navbar-brand {
    font-size: 1.25rem;
  }
  
  .avatar-placeholder {
    width: 100px;
    height: 100px;
    font-size: 3rem;
  }
}

@media (max-width: 576px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  
  .btn {
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
  }
  
  .skill-tags,
  .project-tags {
    justify-content: center;
  }
  
  .d-flex.gap-3 {
    flex-direction: column;
    align-items: center;
  }
  
  .d-flex.gap-3 .btn {
    width: 200px;
  }
}

/* ===============================
   UTILITY CLASSES
   =============================== */

.text-shadow {
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hover-lift {
  transition: all var(--transition-medium);
}

.hover-lift:hover {
  transform: translateY(-5px);
}

.border-gradient {
  border: 2px solid transparent;
  background: linear-gradient(var(--bs-body-bg), var(--bs-body-bg)) padding-box,
              var(--gradient-primary) border-box;
}

/* ===============================
   THEME TOGGLE ENHANCEMENTS
   =============================== */

#themeToggle {
  transition: all var(--transition-medium);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#themeToggle:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 15px rgba(var(--bs-primary-rgb), 0.3);
}

#theme-icon {
  transition: all var(--transition-medium);
}

/* ===============================
   BOOTSTRAP OVERRIDES
   =============================== */

.btn {
  border-radius: 25px;
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: all var(--transition-fast);
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

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

.form-control {
  border-radius: 15px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  transition: all var(--transition-fast);
}

.form-control:focus {
  border-color: var(--bs-primary);
  box-shadow: 0 0 0 0.2rem rgba(var(--bs-primary-rgb), 0.25);
  background: var(--glass-bg);
}

.card {
  border: none;
  transition: all var(--transition-medium);
}

.profile-pic {
  width: 120px; /* adjust size */
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid transparent;
  background-image: linear-gradient(to bottom right, #a64cf4, #ff6ec4); /* match your gradient */
  padding: 3px; /* gradient border spacing */
  display: block;
  margin: auto;
}