/* 
   Creative Portfolio Style Guide (Clean Flat Minimal Theme)
   Author: Nikhil Chandra Roy
   Focus: Minimalist Crisp Roboto Theme (Solid Backgrounds, Colorful Visuals, Better Zig-Zag Projects)
*/

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

:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --accent-purple: #6d28d9;
  --accent-cyan: #0e7490;
  --accent-pink: #be185d;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px 0 rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --font-sans: 'Roboto', sans-serif;
  --font-title: 'Roboto', sans-serif;
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-sans);
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
}

body {
  overflow-x: hidden;
  position: relative;
  background-color: var(--bg-primary);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-purple);
}

/* Helper classes for colorful icons */
.icon-python { color: #3776ab; }
.icon-js { color: #eab308; }
.icon-react { color: #0ea5e9; }
.icon-django { color: #15803d; }
.icon-node { color: #22c55e; }
.icon-sql { color: #06b6d4; }
.icon-ai { color: #db2777; }
.icon-git { color: #f43f5e; }
.icon-api { color: #a855f7; }

.icon-pink { color: #ec4899; }
.icon-purple { color: #8b5cf6; }
.icon-cyan { color: #06b6d4; }
.icon-green { color: #10b981; }
.icon-orange { color: #f97316; }
.icon-blue { color: #3b82f6; }
.icon-yellow { color: #eab308; }

/* Flat Card Utility */
.glass-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  border-radius: 16px;
  transition: var(--transition-smooth);
}

.glass-card:hover {
  border-color: #cbd5e1;
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* Text Styling */
.gradient-text {
  color: var(--text-primary);
  font-family: var(--font-title);
}

.gradient-text-alt {
  color: var(--accent-purple);
}

h1, h2, h3, h4 {
  font-family: var(--font-title);
  color: var(--text-primary);
  font-weight: 700;
}

p {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 1.05rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-cyan);
  margin-bottom: 0.5rem;
}

/* Hero Section (Single Column Layout) */
.hero {
  min-height: 85vh;
  position: relative;
  display: flex;
  align-items: center;
  padding: 6rem 2rem 4rem;
  max-width: 850px;
  margin: 0 auto;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  align-items: flex-start;
  width: 100%;
}

/* Flex header row - avatar and name on same line */
.hero-header-row {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  width: 100%;
  flex-wrap: wrap; /* wraps on small screens to prevent clipping */
}

/* Small Avatar next to Name */
.hero-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  padding: 3px;
  background: #ffffff;
  border: 2px solid var(--accent-purple);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
  flex-shrink: 0; /* keeps picture round */
}

.hero-avatar:hover {
  transform: rotate(5deg) scale(1.05);
  border-color: var(--accent-cyan);
}

.hero-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  background: var(--bg-secondary);
}

.hero-welcome {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--accent-cyan);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.hero-welcome span {
  width: 25px;
  height: 2px;
  background: var(--accent-cyan);
}

.hero h1 {
  font-size: 4rem;
  line-height: 1.1;
  letter-spacing: -1px;
  color: var(--text-primary);
  font-weight: 900;
}

.hero-subtitle {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-purple);
  margin-top: 0.2rem;
}

.hero p {
  max-width: 500px;
}

.hero-ctas {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  margin-top: 1rem;
}

/* Creative & Larger Primary button style */
.btn-primary.creative-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1.2rem 2.8rem;
  border-radius: 50px;
  background: var(--accent-purple);
  color: #ffffff;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
  transition: var(--transition-smooth);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(109, 40, 217, 0.25);
  position: relative;
}

.btn-primary.creative-btn::after {
  content: '';
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border: 2px solid var(--accent-purple);
  border-radius: 50px;
  opacity: 0.8;
  pointer-events: none;
  animation: pulseRing 2s cubic-bezier(0.25, 0, 0, 1) infinite;
}

@keyframes pulseRing {
  0% { transform: scale(0.96); opacity: 0.8; }
  100% { transform: scale(1.15); opacity: 0; }
}

.btn-primary.creative-btn:hover {
  background: #5b21b6;
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 10px 25px rgba(109, 40, 217, 0.4);
}

.btn-primary.creative-btn:hover i {
  animation: wobbleIcon 0.6s ease infinite alternate;
}

@keyframes wobbleIcon {
  0% { transform: rotate(-10deg) scale(1.15); }
  100% { transform: rotate(10deg) scale(1.15); }
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1.1rem 2.2rem;
  border-radius: 50px;
  background: #ffffff;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.05rem;
  transition: var(--transition-smooth);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: #cbd5e1;
  transform: translateY(-2px);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
  font-size: 0.75rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  text-decoration: none;
  z-index: 10;
}

.mouse-icon {
  width: 18px;
  height: 30px;
  border: 2px solid var(--text-secondary);
  border-radius: 9px;
  display: flex;
  justify-content: center;
  padding-top: 4px;
}

.mouse-wheel {
  width: 3px;
  height: 6px;
  background-color: var(--accent-cyan);
  border-radius: 1.5px;
  animation: scrollWheel 1.5s infinite;
}

@keyframes scrollWheel {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(10px); opacity: 0; }
}

/* Sections Styles */
.section {
  position: relative;
  padding: 5rem 2rem;
  z-index: 2;
}

.section-container {
  max-width: 1100px;
  margin: 0 auto;
}

/* Alternating Zig-Zag Project Showcase */
.project-showcase-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
  margin-bottom: 4rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
}

.project-showcase-row:last-child {
  margin-bottom: 0;
}

.project-showcase-row:hover {
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}

.project-showcase-img {
  width: 100%;
  height: 260px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  position: relative;
}

.project-showcase-img picture {
  display: block;
  width: 100%;
  height: 100%;
}

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

.project-showcase-img::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 40%;
  background: linear-gradient(to top, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 0) 100%);
  pointer-events: none;
  z-index: 1;
}

.project-showcase-row:hover .project-showcase-img img {
  transform: scale(1.03);
}

.project-showcase-tag {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: #ffffff;
  z-index: 2;
}

.tag-bella { background: var(--accent-purple); }
.tag-ocean { background: var(--accent-cyan); }
.tag-burger { background: var(--accent-pink); }

.project-showcase-details {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.project-showcase-details h4 {
  font-size: 1.7rem;
  color: var(--text-primary);
  font-weight: 700;
}

.project-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-tag {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

.project-link-btn {
  align-self: flex-start;
  padding: 0.7rem 1.4rem;
  border-radius: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-smooth);
}

.project-showcase-row:hover .project-link-btn {
  background: var(--accent-purple);
  color: #ffffff;
  border-color: var(--accent-purple);
}

@media (min-width: 992px) {
  .project-showcase-row {
    grid-template-columns: 1.15fr 0.85fr;
  }
  
  .project-showcase-row.reverse {
    grid-template-columns: 0.85fr 1.15fr;
  }
  
  .project-showcase-row.reverse .project-showcase-details {
    order: 1;
  }
  
  .project-showcase-row.reverse .project-showcase-img {
    order: 2;
  }
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 3rem 2rem;
  z-index: 2;
  position: relative;
  text-align: center;
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.footer-logo {
  font-family: var(--font-title);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
}

.footer-socials {
  display: flex;
  gap: 1.2rem;
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 1.1rem;
  transition: var(--transition-smooth);
}

.social-link:hover {
  background: var(--accent-purple);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
}

.footer p {
  font-size: 0.85rem;
}

/* WhatsApp Floating Button */
.whatsapp-widget {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 99;
}

.whatsapp-link {
  width: 55px;
  height: 55px;
  border-radius: 50%;
  background: #25D366;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.6rem;
  text-decoration: none;
  box-shadow: 0 2px 10px rgba(37, 211, 102, 0.3);
  transition: var(--transition-smooth);
  animation: pulseWhatsapp 2s infinite;
}

.whatsapp-link:hover {
  transform: scale(1.1);
  background: #20ba5a;
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
  animation: none;
}

@keyframes pulseWhatsapp {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.5); }
  70% { transform: scale(1.05); box-shadow: 0 0 0 10px rgba(37, 211, 102, 0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

/* Scroll reveal triggers */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Responsive adjust */
@media (max-width: 991px) {
  .hero {
    text-align: center;
    justify-content: center;
    padding-top: 5rem;
  }

  .hero-content {
    align-items: center;
  }

  .hero-header-row {
    justify-content: center;
    gap: 1rem;
  }

  .hero h1 {
    font-size: 3rem;
  }
  
  .hero p {
    margin: 0 auto;
  }
  
  .project-showcase-row {
    grid-template-columns: 1fr !important;
    text-align: center;
    padding: 1.5rem;
    gap: 2rem;
  }
  
  .project-link-btn {
    align-self: center;
  }
  
  .project-tech-tags {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero-avatar {
    width: 70px;
    height: 70px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }
  
  .hero-subtitle {
    font-size: 1.3rem;
  }
  
  .hero-ctas {
    flex-direction: column;
    width: 100%;
    gap: 0.8rem;
  }
  
  .btn-primary.creative-btn, .btn-secondary {
    width: 100%;
    justify-content: center;
  }
  
  .project-showcase-img {
    height: 200px;
  }
}