/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Inter", "Segoe UI", sans-serif;
}

html {
  scroll-behavior: smooth;
}

/* Root Colors */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --secondary: #a78bfa;
  --accent: #ec4899;
  --dark: #0f172a;
  --dark-light: #1e293b;
  --text-gray: #64748b;
  --light: #f8fafc;
}

/* Body */
body {
  background: #ffffff;
  color: var(--dark);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Animated Background */
.bg-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.floating-shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.3;
  animation: float 25s infinite ease-in-out;
}

.shape-1 {
  width: 500px;
  height: 500px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  top: -100px;
  left: -100px;
  animation-delay: 0s;
}

.shape-2 {
  width: 400px;
  height: 400px;
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  top: 40%;
  right: -100px;
  animation-delay: 7s;
}

.shape-3 {
  width: 350px;
  height: 350px;
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  bottom: -100px;
  left: 30%;
  animation-delay: 14s;
}

@keyframes float {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(100px, -100px) scale(1.1);
  }
  66% {
    transform: translate(-100px, 100px) scale(0.9);
  }
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 25px 80px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(99, 102, 241, 0.1);
  transition: all 0.3s ease;
}

.navbar.scrolled {
  padding: 18px 80px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
  background: rgba(255, 255, 255, 0.95);
}

.logo {
  font-size: 2rem;
  font-weight: 900;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  cursor: pointer;
  transition: transform 0.3s ease;
  letter-spacing: -1px;
}

.logo:hover {
  transform: scale(1.05);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 40px;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--dark);
  font-weight: 600;
  font-size: 0.95rem;
  position: relative;
  transition: color 0.3s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -5px;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transition: all 0.3s ease;
  transform: translateX(-50%);
  border-radius: 2px;
}

.nav-links a:hover {
  color: var(--primary);
}

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

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

.hero-content {
  max-width: 900px;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: 10px 24px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 50px;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 30px;
  animation: fadeInDown 1s ease;
}

.hero h1 {
  font-size: 4.5rem;
  font-weight: 900;
  margin-bottom: 25px;
  line-height: 1.1;
  animation: fadeInUp 1s ease 0.2s backwards;
}

.hero h1 span {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.4rem;
  color: var(--text-gray);
  margin-bottom: 20px;
  font-weight: 500;
  animation: fadeInUp 1s ease 0.4s backwards;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-gray);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.8;
  animation: fadeInUp 1s ease 0.6s backwards;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease 0.8s backwards;
}

/* Buttons */
.btn {
  padding: 16px 40px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.2);
  transition: left 0.5s ease;
}

.btn:hover::before {
  left: 100%;
}

.btn.primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  box-shadow: 0 10px 40px rgba(102, 126, 234, 0.4);
}

.btn.primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 50px rgba(102, 126, 234, 0.5);
}

.btn.outline {
  border: 2px solid var(--primary);
  color: var(--primary);
  background: white;
}

.btn.outline:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

.scroll-indicator::after {
  content: "↓";
  font-size: 2rem;
  color: var(--primary);
}

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

/* Sections */
.section {
  max-width: 1200px;
  margin: auto;
  padding: 100px 40px;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 70px;
}

.section-label {
  display: inline-block;
  padding: 8px 20px;
  background: rgba(99, 102, 241, 0.1);
  border-radius: 50px;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 15px;
}

.section h2 {
  font-size: 3rem;
  font-weight: 900;
  color: var(--dark);
  margin-bottom: 20px;
}

.section-text {
  max-width: 700px;
  margin: 0 auto;
  font-size: 1.15rem;
  color: var(--text-gray);
  line-height: 1.8;
}

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image {
  width: 100%;
  aspect-ratio: 1;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 30px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(102, 126, 234, 0.3);
}

.about-image::before {
  content: "BD";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 8rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.2);
}

.about-text {
  text-align: left;
}

.about-text h2 {
  text-align: left;
  margin-bottom: 25px;
}

.about-text p {
  color: var(--text-gray);
  margin-bottom: 20px;
  font-size: 1.05rem;
  line-height: 1.8;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 40px;
}

.stat-item {
  text-align: center;
  padding: 25px;
  background: rgba(99, 102, 241, 0.05);
  border-radius: 20px;
  transition: transform 0.3s ease;
}

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

.stat-number {
  font-size: 2.5rem;
  font-weight: 900;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  margin-bottom: 5px;
}

.stat-label {
  color: var(--text-gray);
  font-size: 0.9rem;
  font-weight: 600;
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 25px;
  margin-top: 50px;
}

.skill {
  background: white;
  padding: 35px 25px;
  border-radius: 24px;
  text-align: center;
  font-weight: 700;
  font-size: 1.05rem;
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.08);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  border: 2px solid transparent;
}

.skill::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}

.skill:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 60px rgba(102, 126, 234, 0.25);
  border-color: rgba(99, 102, 241, 0.2);
}

.skill:hover::before {
  transform: scaleX(1);
}

.skill-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
  display: block;
}

/* Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 40px;
  margin-top: 50px;
}

.project-card {
  background: white;
  border-radius: 30px;
  overflow: hidden;
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.08);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 2px solid transparent;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 25px 70px rgba(102, 126, 234, 0.25);
  border-color: rgba(99, 102, 241, 0.2);
}

.project-image {
  width: 100%;
  height: 220px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  position: relative;
  overflow: hidden;
}

.project-image::before {
  content: "🚀";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 4rem;
  opacity: 0.3;
}

.project-content {
  padding: 35px;
}

.project-card h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 15px;
  color: var(--dark);
}

.project-card p {
  color: var(--text-gray);
  margin-bottom: 25px;
  line-height: 1.7;
  font-size: 1rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.tag {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 50px;
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  transition: all 0.3s ease;
}

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

.project-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: gap 0.3s ease;
}

.project-link:hover {
  gap: 12px;
}

/* Contact Section */
.contact-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.contact-box {
  background: white;
  padding: 60px 50px;
  border-radius: 30px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
  margin-top: 40px;
}

.email-display {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--dark);
  margin: 30px 0;
  padding: 25px;
  background: rgba(99, 102, 241, 0.05);
  border-radius: 20px;
  transition: all 0.3s ease;
}

.email-display:hover {
  background: rgba(99, 102, 241, 0.1);
  transform: scale(1.02);
}

.email-icon {
  font-size: 2rem;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 35px;
}

.social-link {
  width: 55px;
  height: 55px;
  border-radius: 50%;
  background: white;
  border: 2px solid rgba(99, 102, 241, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  transition: all 0.3s ease;
  text-decoration: none;
}

.social-link:hover {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-color: transparent;
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

/* Footer */
footer {
  background: var(--dark);
  color: white;
  text-align: center;
  padding: 50px 40px;
  margin-top: 100px;
}

footer p {
  font-size: 1rem;
  opacity: 0.8;
}

footer a {
  color: var(--secondary);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

footer a:hover {
  color: white;
}

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

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

/* Responsive Design */
@media (max-width: 1024px) {
  .about-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-text h2 {
    text-align: center;
  }

  .about-image {
    max-width: 400px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: 20px 30px;
  }

  .nav-links {
    gap: 25px;
    font-size: 0.9rem;
  }

  .hero h1 {
    font-size: 3rem;
  }

  .hero-subtitle {
    font-size: 1.2rem;
  }

  .section h2 {
    font-size: 2.2rem;
  }

  .stats {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .navbar {
    flex-direction: column;
    gap: 20px;
    padding: 20px;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
  }

  .hero {
    padding: 100px 20px 60px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

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

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

  .section {
    padding: 60px 20px;
  }

  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
  }
}