/* ==========================================================================
   KUSH AGARWAL | PORTFOLIO DESIGN SYSTEM & STYLESHEET
   Features: Hero 3D Bot Centerpiece, Real LeetCode (kush0809) Heatmap, Light/Dark Modes,
   5-Project Interactive Carousel Slider, Interactive AI Assistant Floating Chatbot Widget
   ========================================================================== */

:root {
  /* Dark Theme Color Palette */
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(31, 41, 55, 0.8);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(6, 182, 212, 0.4);

  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-heading: #ffffff;

  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-violet: #8b5cf6;
  --accent-blue: #3b82f6;

  --gradient-primary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #8b5cf6 100%);
  --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  --gradient-leetcode: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', var(--font-sans);
  --font-mono: 'Fira Code', monospace;

  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
}

/* Light Theme Variable Overrides */
body.light-mode {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.8);
  --bg-card-hover: rgba(241, 245, 249, 0.9);
  --border-color: rgba(0, 0, 0, 0.08);
  --border-glow: rgba(6, 182, 212, 0.6);

  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-heading: #0f172a;

  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.08);
}

/* Global Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  outline: none;
  border: none;
  text-decoration: none;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-heading);
  letter-spacing: -0.02em;
}

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

.gradient-leetcode {
  background: var(--gradient-leetcode);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* Preloader */
.loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: var(--bg-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-spinner {
  width: 60px;
  height: 60px;
  border: 4px solid var(--border-color);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 1s infinite linear;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Scroll Progress Bar */
.progress-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: transparent;
  z-index: 1001;
}

.progress-bar {
  height: 4px;
  background: var(--gradient-primary);
  width: 0%;
  transition: width 0.1s ease-out;
}

/* Header & Navigation Bar */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.2rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  background: rgba(11, 15, 25, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-smooth);
}

body.light-mode header {
  background: rgba(255, 255, 255, 0.85);
}

header .logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-heading);
}

.logo-avatar {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.4);
}

nav.navbar ul {
  display: flex;
  list-style: none;
  gap: 1.8rem;
}

nav.navbar ul li a {
  color: var(--text-main);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition-smooth);
  position: relative;
  padding: 0.3rem 0;
}

nav.navbar ul li a:hover,
nav.navbar ul li a.active {
  color: var(--accent-cyan);
}

nav.navbar ul li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition-smooth);
  border-radius: 2px;
}

nav.navbar ul li a:hover::after,
nav.navbar ul li a.active::after {
  width: 100%;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Theme Switcher Toggle Button */
.theme-switch {
  position: relative;
  display: inline-block;
  width: 54px;
  height: 28px;
}

.theme-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  transition: .4s;
  border-radius: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 6px;
}

.slider .sun-icon { color: #f59e0b; font-size: 13px; }
.slider .moon-icon { color: #94a3b8; font-size: 13px; }

.slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 4px;
  bottom: 3px;
  background-color: var(--accent-cyan);
  transition: .4s;
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-cyan);
}

input:checked + .slider:before {
  transform: translateX(25px);
  background-color: #f59e0b;
  box-shadow: 0 0 8px #f59e0b;
}

#menu-btn {
  font-size: 1.5rem;
  color: var(--text-main);
  cursor: pointer;
  display: none;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  padding: 8rem 5% 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  gap: 2rem;
}

#particles-js {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.hero-content {
  max-width: 650px;
  z-index: 2;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: 30px;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.hero-typing {
  font-size: 1.4rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
  min-height: 2.2rem;
}

.hero-typing .typed-text {
  color: var(--accent-cyan);
  font-weight: 600;
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1.2rem;
  margin-bottom: 2.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-primary {
  background: var(--gradient-primary);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(6, 182, 212, 0.5);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-3px);
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  font-size: 1.1rem;
  transition: var(--transition-smooth);
}

.social-icon:hover {
  background: var(--gradient-primary);
  color: #ffffff;
  border-color: transparent;
  transform: translateY(-4px) rotate(8deg);
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.4);
}

/* Hero 3D Bot Centerpiece (Positioned in Hero Section) */
.hero-bot-container {
  flex: 1;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
}

.hero-bot-speech {
  background: var(--bg-card);
  border: 1px solid var(--accent-cyan);
  padding: 0.65rem 1.2rem;
  border-radius: 20px;
  border-bottom-left-radius: 4px;
  font-size: 0.85rem;
  color: var(--accent-cyan);
  margin-bottom: 1.2rem;
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.25);
  animation: floatSpeech 4s ease-in-out infinite;
  text-align: center;
  backdrop-filter: blur(10px);
}

@keyframes floatSpeech {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

.hero-bot-card {
  width: 100%;
  max-width: 360px;
  aspect-ratio: 1/1;
  border-radius: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--glass-shadow), 0 0 35px rgba(6, 182, 212, 0.15);
  backdrop-filter: blur(16px);
  cursor: pointer;
  transition: transform 0.15s ease-out, border-color 0.3s ease;
  position: relative;
  overflow: hidden;
}

.hero-bot-card:hover {
  border-color: var(--accent-cyan);
  box-shadow: var(--glass-shadow), 0 0 45px rgba(6, 182, 212, 0.35);
}

.hero-bot-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 20px;
  filter: drop-shadow(0 10px 20px rgba(0,0,0,0.5));
  animation: botHoverPulse 3s ease-in-out infinite alternate;
}

@keyframes botHoverPulse {
  0% { transform: scale(1); }
  100% { transform: scale(1.03); }
}

/* Systems & Network Mindset Section */
.systems-section,
.about,
.tech-stack-section,
.projects,
.leetcode-section,
.cert-achieve-section,
.contact {
  padding: 5rem 5%;
  position: relative;
  z-index: 2;
}

.section-heading {
  font-size: 2.3rem;
  text-align: center;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto 3rem;
}

.systems-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr 1fr;
  gap: 1.5rem;
}

.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  backdrop-filter: blur(12px);
  transition: var(--transition-smooth);
}

.info-card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--glass-shadow);
  transform: translateY(-4px);
}

.profile-highlight-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.profile-avatar-wrapper {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  padding: 4px;
  background: var(--gradient-primary);
  margin-bottom: 1rem;
}

.profile-avatar-wrapper img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

.network-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.8rem;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* Network Nodes Canvas Card */
.network-globe-card {
  position: relative;
  overflow: hidden;
  min-height: 260px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

#network-nodes-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.network-globe-content {
  position: relative;
  z-index: 2;
  background: linear-gradient(180deg, transparent 0%, rgba(11, 15, 25, 0.9) 100%);
  padding: 1rem;
  border-radius: var(--radius-md);
}

.social-grid-boxes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}

.social-box-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-main);
  transition: var(--transition-smooth);
  font-size: 0.85rem;
}

.social-box-item i {
  font-size: 1.4rem;
  color: var(--accent-cyan);
}

.social-box-item:hover {
  border-color: var(--accent-cyan);
  transform: scale(1.05);
}

/* About Me Section */
.about-container {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 3rem;
  align-items: center;
}

.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--glass-shadow);
  position: relative;
}

.about-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: var(--transition-smooth);
}

.about-image:hover img {
  transform: scale(1.03);
}

.about-content h3 {
  font-size: 2rem;
  margin-bottom: 0.3rem;
}

.about-role-tag {
  color: var(--accent-cyan);
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-block;
  margin-bottom: 1.2rem;
}

.about-text {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 1.8rem;
}

.about-meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin-bottom: 2rem;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.meta-item i {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.meta-item div span {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.meta-item div strong {
  font-size: 0.9rem;
  color: var(--text-heading);
}

/* Tech Stack Floating Bubble Cloud */
.tech-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1.8rem;
  max-width: 950px;
  margin: 0 auto;
  padding: 2rem 0;
  perspective: 1000px;
}

.tech-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.bubble-float {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  transition: var(--transition-smooth);
  animation: floatBubble 5s ease-in-out infinite alternate;
}

.size-xl .bubble-float { width: 100px; height: 100px; }
.size-lg .bubble-float { width: 85px; height: 85px; }
.size-md .bubble-float { width: 72px; height: 72px; }
.size-sm .bubble-float { width: 60px; height: 60px; }

@keyframes floatBubble {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(4deg); }
  100% { transform: translateY(5px) rotate(-3deg); }
}

.tech-item:hover .bubble-float {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 25px rgba(6, 182, 212, 0.5);
  transform: scale(1.15) translateY(-8px);
}

.tech-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition-smooth);
}

.tech-item:hover .tech-name {
  color: var(--accent-cyan);
}

/* ==========================================================================
   FEATURED PROJECTS INTERACTIVE SLIDING CAROUSEL (5 PROJECTS TRACK)
   ========================================================================== */
.projects-carousel-wrapper {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  font-size: 1.3rem;
  cursor: pointer;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  transition: var(--transition-smooth);
}

.carousel-btn:hover {
  background: var(--accent-cyan);
  color: #ffffff;
  box-shadow: 0 0 25px rgba(6, 182, 212, 0.6);
  transform: translateY(-50%) scale(1.1);
}

.prev-btn { left: -20px; }
.next-btn { right: -20px; }

.projects-carousel-track {
  display: flex;
  gap: 1.8rem;
  overflow-x: auto;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  padding: 1.5rem 0.5rem;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.projects-carousel-track::-webkit-scrollbar {
  display: none;
}

.project-card {
  flex: 0 0 calc(33.333% - 1.2rem);
  min-width: 320px;
  scroll-snap-align: start;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(12px);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  border-color: var(--accent-cyan);
  box-shadow: var(--glass-shadow), 0 0 30px rgba(6, 182, 212, 0.2);
  transform: translateY(-6px);
}

.project-image {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.project-card:hover .project-image img {
  transform: scale(1.06);
}

.project-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 0.3rem 0.75rem;
  background: rgba(11, 15, 25, 0.85);
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  backdrop-filter: blur(8px);
}

.project-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.project-title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.project-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.project-bullets {
  list-style: none;
  margin-bottom: 1.2rem;
}

.project-bullets li {
  font-size: 0.82rem;
  color: var(--text-muted);
  position: relative;
  padding-left: 1.2rem;
  margin-bottom: 0.4rem;
}

.project-bullets li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
  margin-bottom: 1.2rem;
}

.tag-pill {
  padding: 0.2rem 0.6rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--text-main);
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.carousel-dots .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--border-color);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.carousel-dots .dot.active {
  background: var(--accent-cyan);
  width: 28px;
  border-radius: 10px;
  box-shadow: 0 0 10px var(--accent-cyan);
}

/* LeetCode Live Section (@kush0809) */
.leetcode-container {
  max-width: 950px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.lc-live-card-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  backdrop-filter: blur(12px);
  text-align: center;
}

.lc-live-embed-img {
  width: 100%;
  max-width: 850px;
  height: auto;
  border-radius: var(--radius-md);
  margin-top: 1rem;
  transition: var(--transition-smooth);
  box-shadow: var(--glass-shadow);
}

.lc-live-embed-img:hover {
  transform: scale(1.01);
  box-shadow: 0 0 30px rgba(245, 158, 11, 0.3);
}

/* Certifications Grid */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  gap: 1.2rem;
  align-items: flex-start;
  backdrop-filter: blur(12px);
  transition: var(--transition-smooth);
}

.cert-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
}

.cert-icon-wrapper {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

/* Contact Section */
.contact-container {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 2.5rem;
  max-width: 950px;
  margin: 0 auto;
}

.contact-info-box {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.contact-card-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  backdrop-filter: blur(12px);
}

.contact-card-item i {
  font-size: 1.3rem;
  color: var(--accent-cyan);
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(12px);
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.8rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}

.form-control:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.3);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

/* ==========================================================================
   INTERACTIVE AI ASSISTANT FLOATING CHATBOT WIDGET STYLES
   ========================================================================== */
.chatbot-widget {
  position: fixed;
  bottom: 25px;
  right: 90px;
  z-index: 999;
}

.chatbot-toggle-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.4rem;
  border-radius: 30px;
  background: var(--gradient-primary);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.45);
  transition: var(--transition-smooth);
  position: relative;
}

.chatbot-toggle-btn:hover {
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 8px 25px rgba(6, 182, 212, 0.6);
}

.chatbot-icon {
  font-size: 1.2rem;
}

.chatbot-pulse-dot {
  width: 10px;
  height: 10px;
  background-color: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-emerald);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Glassmorphic Chat Drawer Window */
.chatbot-drawer {
  position: absolute;
  bottom: 60px;
  right: 0;
  width: 380px;
  height: 520px;
  background: rgba(17, 24, 39, 0.94);
  border: 1px solid var(--accent-cyan);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6), 0 0 25px rgba(6, 182, 212, 0.3);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.95);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
}

body.light-mode .chatbot-drawer {
  background: rgba(255, 255, 255, 0.95);
}

.chatbot-drawer.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.chatbot-header {
  padding: 1rem 1.2rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chatbot-header-info {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.chatbot-sticker {
  width: 58px;
  height: 58px;
  flex: 0 0 58px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(251, 146, 60, 0.8);
  box-shadow: 0 4px 14px rgba(251, 146, 60, 0.35);
  animation: chatbotStickerFloat 3s ease-in-out infinite;
}

.chatbot-sticker img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center;
}

@keyframes chatbotStickerFloat {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(-3px) rotate(2deg); }
}

.chatbot-header-info h4 {
  font-size: 0.95rem;
  margin-bottom: 0.1rem;
}

.online-indicator {
  font-size: 0.72rem;
  color: var(--accent-emerald);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.chatbot-close-btn {
  background: transparent;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.chatbot-close-btn:hover {
  color: var(--text-heading);
  transform: rotate(90deg);
}

/* Chat Messages Container */
.chatbot-messages {
  flex: 1;
  padding: 1rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-cyan) transparent;
}

.chatbot-messages::-webkit-scrollbar {
  width: 4px;
}

.chatbot-messages::-webkit-scrollbar-thumb {
  background: var(--accent-cyan);
  border-radius: 4px;
}

.chat-message {
  display: flex;
  max-width: 85%;
  font-size: 0.85rem;
  line-height: 1.45;
  animation: fadeInMsg 0.3s ease;
}

@keyframes fadeInMsg {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-message.bot-message {
  align-self: flex-start;
}

.chat-message.user-message {
  align-self: flex-end;
}

.msg-content {
  padding: 0.75rem 1rem;
  border-radius: 16px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.15);
}

.bot-message .msg-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-bottom-left-radius: 4px;
}

.user-message .msg-content {
  background: var(--gradient-primary);
  color: #ffffff;
  border-bottom-right-radius: 4px;
}

/* Chips Prompt Suggestions */
.chatbot-chips {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding: 0.5rem 0.8rem;
  border-top: 1px solid var(--border-color);
  background: rgba(0,0,0,0.1);
  scrollbar-width: none;
}

.chatbot-chips::-webkit-scrollbar {
  display: none;
}

.chip-btn {
  white-space: nowrap;
  padding: 0.3rem 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--accent-cyan);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.chip-btn:hover {
  background: var(--accent-cyan);
  color: #ffffff;
  border-color: transparent;
}

/* Chat Input Field Form */
.chatbot-input-area {
  padding: 0.75rem;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 0.5rem;
}

.chatbot-input-area input {
  flex: 1;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 0.6rem 1rem;
  color: var(--text-main);
  font-size: 0.85rem;
  outline: none;
}

.chatbot-input-area input:focus {
  border-color: var(--accent-cyan);
}

.chatbot-input-area button {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.chatbot-input-area button:hover {
  transform: scale(1.08);
}

/* Footer & Scroll Top */
footer {
  text-align: center;
  padding: 2rem 5%;
  border-top: 1px solid var(--border-color);
  font-size: 0.9rem;
  color: var(--text-muted);
}

#scroll-top {
  position: fixed;
  bottom: 25px;
  right: 25px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.4);
}

#scroll-top.visible {
  opacity: 1;
  visibility: visible;
}

#scroll-top:hover {
  transform: translateY(-4px);
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero {
    flex-direction: column;
    text-align: center;
    padding-top: 7rem;
  }
  .hero-content { max-width: 100%; }
  .hero-actions { justify-content: center; }
  .social-links { justify-content: center; }
  .systems-grid { grid-template-columns: 1fr; }
  .about-container { grid-template-columns: 1fr; }
  .contact-container { grid-template-columns: 1fr; }
  .project-card { flex: 0 0 calc(50% - 1rem); }
}

@media (max-width: 768px) {
  #menu-btn { display: block; }
  header nav.navbar {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
    transition: 0.4s ease;
  }
  header nav.navbar.active {
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  }
  header nav.navbar ul {
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.2rem;
  }
  .hero-title { font-size: 2.5rem; }
  .project-card { flex: 0 0 100%; }
  .prev-btn { left: 0px; }
  .next-btn { right: 0px; }
  .chatbot-drawer { width: 320px; right: -40px; }
}