/* ============================================
   ASHISH KUMAR - WORLD-CLASS PORTFOLIO
   Design System & Homepage Styles
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800;900&display=swap');

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-glass: rgba(255, 255, 255, 0.06);
  --bg-glass-hover: rgba(255, 255, 255, 0.1);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(124, 58, 237, 0.4);

  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b8;
  --text-muted: #6b6b80;

  --accent-green: #00ffab;
  --accent-purple: #7c3aed;
  --accent-gold: #ffae00;
  --accent-blue: #3b82f6;
  --accent-pink: #ec4899;

  --gradient-main: linear-gradient(135deg, #7c3aed 0%, #00ffab 50%, #3b82f6 100%);
  --gradient-hero: linear-gradient(135deg, #7c3aed 0%, #ec4899 50%, #ffae00 100%);
  --gradient-card: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(0, 255, 171, 0.05));

  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(124, 58, 237, 0.2);

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent-purple), var(--accent-green));
  border-radius: 4px;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* --- Animated Background --- */
.bg-animated {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  z-index: -2;
  overflow: hidden;
  background: var(--bg-primary);
}

.bg-animated::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(124, 58, 237, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(0, 255, 171, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 60% 80%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 40% 30%, rgba(236, 72, 153, 0.06) 0%, transparent 50%);
  animation: bgFloat 20s ease-in-out infinite;
}

@keyframes bgFloat {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  25% { transform: translate(2%, -2%) rotate(1deg); }
  50% { transform: translate(-1%, 3%) rotate(-1deg); }
  75% { transform: translate(-3%, -1%) rotate(0.5deg); }
}

#particles-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  z-index: -1;
  pointer-events: none;
}

/* --- Glassmorphism Navbar --- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 40px;
  transition: var(--transition-smooth);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  z-index: 1001;
}

.nav-logo img {
  width: 48px;
  height: 48px;
  object-fit: contain;
  filter: drop-shadow(0 0 8px rgba(124, 58, 237, 0.3));
}

.nav-logo span {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 18px;
  border-radius: 50px;
  transition: var(--transition-fast);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: var(--bg-glass);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--gradient-main);
  border-radius: 2px;
}

.nav-links a i {
  margin-right: 6px;
  font-size: 0.85rem;
}

/* GitHub nav button special styling */
.nav-links a.nav-github {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  margin-left: 8px;
}

.nav-links a.nav-github:hover {
  border-color: var(--accent-purple);
  box-shadow: 0 0 15px rgba(124, 58, 237, 0.2);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  z-index: 1001;
  gap: 5px;
  padding: 10px;
}

.hamburger span {
  width: 28px;
  height: 2.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-smooth);
  transform-origin: right;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(-45deg) translate(1px, -1px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
  transform: translateX(10px);
}

.hamburger.active span:nth-child(3) {
  transform: rotate(45deg) translate(1px, 1px);
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 40px 80px;
  position: relative;
}

.hero-container {
  max-width: 1300px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
}

.hero-content {
  flex: 1;
  max-width: 650px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px 6px 8px;
  border-radius: 50px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  font-size: 0.85rem;
  color: var(--accent-green);
  margin-bottom: 28px;
  animation: fadeInUp 0.8s ease forwards;
  opacity: 0;
}

.hero-badge .dot {
  width: 8px; height: 8px;
  background: var(--accent-green);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-greeting {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
  animation: fadeInUp 0.8s 0.1s ease forwards;
  opacity: 0;
}

.hero-greeting .wave {
  display: inline-block;
  animation: wave-hand 2.5s infinite;
  transform-origin: 70% 70%;
  font-size: 1.5rem;
}

@keyframes wave-hand {
  0% { transform: rotate(0deg); }
  10% { transform: rotate(14deg); }
  20% { transform: rotate(-8deg); }
  30% { transform: rotate(14deg); }
  40% { transform: rotate(-4deg); }
  50% { transform: rotate(10deg); }
  60% { transform: rotate(0deg); }
  100% { transform: rotate(0deg); }
}

.hero-name {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 5vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 16px;
  animation: fadeInUp 0.8s 0.2s ease forwards;
  opacity: 0;
}

.hero-name .gradient-text {
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% auto;
  animation: gradient-shift 4s linear infinite;
}

@keyframes gradient-shift {
  0% { background-position: 0% center; }
  50% { background-position: 100% center; }
  100% { background-position: 0% center; }
}

.hero-typewriter-wrapper {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 32px;
  min-height: 2.5rem;
  animation: fadeInUp 0.8s 0.3s ease forwards;
  opacity: 0;
}

.hero-typewriter-wrapper .typed-text {
  color: var(--accent-green);
}

.hero-typewriter-wrapper .cursor {
  display: inline-block;
  width: 3px;
  height: 1.6rem;
  background: var(--accent-green);
  margin-left: 2px;
  vertical-align: middle;
  animation: blink-cursor 0.8s steps(2) infinite;
}

@keyframes blink-cursor {
  0% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 520px;
  animation: fadeInUp 0.8s 0.4s ease forwards;
  opacity: 0;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s 0.5s ease forwards;
  opacity: 0;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: var(--gradient-main);
  color: var(--bg-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  opacity: 0;
  transition: var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(124, 58, 237, 0.4), 0 0 60px rgba(0, 255, 171, 0.1);
}

.btn-primary:hover::before { opacity: 1; }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1.5px solid var(--border-glass);
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
}

.btn-secondary:hover {
  border-color: var(--accent-purple);
  background: var(--bg-glass);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* Hero Avatar */
.hero-visual {
  flex: 0 0 auto;
  position: relative;
  animation: fadeInUp 0.8s 0.3s ease forwards;
  opacity: 0;
}

.avatar-container {
  position: relative;
  width: 380px;
  height: 380px;
}

.avatar-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid transparent;
  background:
    linear-gradient(var(--bg-primary), var(--bg-primary)) padding-box,
    var(--gradient-main) border-box;
  animation: ring-rotate 8s linear infinite;
}

.avatar-ring::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: var(--gradient-main);
  opacity: 0.15;
  filter: blur(20px);
  animation: ring-glow 4s ease-in-out infinite;
}

@keyframes ring-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes ring-glow {
  0%, 100% { opacity: 0.15; }
  50% { opacity: 0.3; }
}

.avatar-image {
  position: absolute;
  inset: 15px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--bg-secondary);
}

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

/* Floating orbit dots */
.orbit-dot {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  animation: orbit 6s linear infinite;
}

.orbit-dot:nth-child(1) {
  background: var(--accent-green);
  top: 30px; left: 50%;
  animation-delay: 0s;
  box-shadow: 0 0 10px var(--accent-green);
}

.orbit-dot:nth-child(2) {
  background: var(--accent-purple);
  bottom: 30px; right: 20%;
  animation-delay: -2s;
  box-shadow: 0 0 10px var(--accent-purple);
}

.orbit-dot:nth-child(3) {
  background: var(--accent-gold);
  top: 50%; left: 10px;
  animation-delay: -4s;
  box-shadow: 0 0 10px var(--accent-gold);
}

@keyframes orbit {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.8; }
  25% { transform: translateY(-10px) scale(1.1); opacity: 1; }
  50% { transform: translateY(0) scale(1); opacity: 0.6; }
  75% { transform: translateY(10px) scale(0.9); opacity: 1; }
}

/* --- Stats Section --- */
.stats-section {
  padding: 40px 40px 80px;
  position: relative;
}

.stats-grid {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  text-align: center;
  padding: 32px 16px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  transition: var(--transition-smooth);
}

.stat-card:hover {
  background: var(--bg-glass-hover);
  border-color: var(--accent-purple);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* --- Footer --- */
.footer {
  position: relative;
  padding: 60px 40px 30px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-glass);
}

.footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-main);
}

.footer-content {
  max-width: 1300px;
  margin: 0 auto;
  text-align: center;
}

.footer h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.footer p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.footer-socials {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
}

.footer-socials a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  font-size: 1.1rem;
  color: var(--text-secondary);
  transition: var(--transition-smooth);
}

.footer-socials a:hover {
  color: var(--text-primary);
  border-color: var(--accent-purple);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.footer-socials a:nth-child(1):hover { border-color: #333; color: #fff; }
.footer-socials a:nth-child(2):hover { border-color: #0077b5; color: #0077b5; }
.footer-socials a:nth-child(3):hover { border-color: #E4405F; color: #E4405F; }

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-glass);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Scroll Reveal Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0.05s; }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 0.15s; }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 0.2s; }

.reveal-stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* --- Page Transition --- */
.page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.page-loader.loaded {
  opacity: 0;
}

.loader-spinner {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid var(--border-glass);
  border-top-color: var(--accent-purple);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .hero-container {
    flex-direction: column-reverse;
    text-align: center;
  }
  .hero-content {
    max-width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .hero-description { text-align: center; }
  .avatar-container { width: 280px; height: 280px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .navbar { padding: 0 20px; }
  .nav-container { height: 70px; }

  .hamburger { display: flex; }

  .nav-links {
    position: fixed;
    top: 0; right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    padding: 40px;
    transition: var(--transition-smooth);
    border-left: 1px solid var(--border-glass);
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links a {
    font-size: 1.1rem;
    padding: 14px 24px;
    width: 100%;
    text-align: left;
    border-radius: var(--radius-md);
  }

  .hero {
    padding: 100px 20px 60px;
    min-height: auto;
  }

  .hero-name {
    font-size: 2.2rem;
  }

  .avatar-container { width: 220px; height: 220px; }

  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary, .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .stats-section { padding: 20px 20px 60px; }
  .stats-grid { gap: 12px; }
  .stat-card { padding: 24px 12px; }
  .stat-number { font-size: 1.8rem; }

  .footer { padding: 40px 20px 20px; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-number { font-size: 1.5rem; }
}