:root {
  /* Color Palette */
  --primary: #4f46e5;         
  --primary-hover: #4338ca;
  --secondary: #0ea5e9;        
  --accent: #f59e0b;         
  
  --bg-body: #f8fafc;
  --bg-card: #ffffff;
  --bg-nav: rgba(255, 255, 255, 0.95);
  
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-light: #94a3b8;
  
  --border: #e2e8f0;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  /* Spacing & Layout */
  --container-max: 1100px;
  --section-padding: 5rem 2rem;
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
  scroll-snap-type: y mandatory;
  scroll-padding-bottom: 2rem;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

/*Section Background Colors*/
#home {
  background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
  position: relative;
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 3rem;
  padding-top: 3rem;
  min-height: 22rem;
  padding-bottom: 3rem;
}

#about {
  background: 
    url('./images/photo-1685969116188-ed5ad852a97a.jpg')
    no-repeat center center/cover;
  position: relative;
}

#projects {
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

#contact {
  background: linear-gradient(135deg, #faf5ff 0%, #f3e8ff 100%);
}

/*Typography*/
h1, h2, h3 {
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
  color: var(--text-primary);
  position: relative;
}

h1 { 
  font-size: clamp(2rem, 5vw, 2.75rem); 
  margin-bottom: 1.25rem;
  position: relative;
  display: inline-block;
}

/* Gradient text, Typewriter effect */
.gradient-heading {
  background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
  background-size: 300% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  overflow: hidden;
  border-right: 3px solid var(--primary);
  white-space: nowrap;
  margin: 0 auto;
  animation: 
    typewriter 3.5s steps(25) forwards,
    blinkCursor 0.75s step-end forwards,
    gradientFlow 12s ease infinite;
}

@keyframes typewriter {
  0% { width: 0; }
  100% { width: 100%; }
}

@keyframes blinkCursor {
  0%, 100% { border-color: transparent; }
  50% { border-color: var(--primary); }
}

@keyframes gradientFlow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.emoji {
  display: inline;
  -webkit-text-fill-color: initial;
  text-fill-color: initial;
  background: none;
  -webkit-background-clip: initial;
  background-clip: initial;
  margin-left: 0.1rem;
  animation: none;
}

h2 { 
  font-size: clamp(1.5rem, 4vw, 2rem); 
  position: relative; 
  padding-bottom: 0.75rem; 
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
}

h3 { 
  font-size: 1.25rem; 
  margin: 2rem 0 1rem; 
  color: var(--primary);
  transition: var(--transition);
}

h3:hover {
  transform: translateX(4px);
  text-shadow: 0 2px 8px rgba(79, 70, 229, 0.15);
}

p { 
  margin-bottom: 1rem; 
  color: var(--text-secondary);
}

a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -2px;
  left: 0;
  background: var(--primary);
  transition: var(--transition);
}

a:hover::after { 
  width: 100%; 
}

/*Layout*/
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

main { 
  position: relative; 
  z-index: 1; 
}

section {
  padding: var(--section-padding);
  max-width: 100%;
  margin: 0 auto;
  animation: fadeInUp 0.6s ease-out forwards;
  opacity: 0;
  transform: translateY(20px);
  scroll-snap-align: start;
  min-height: 100vh;
  height: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

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

/*Header & Navigation*/
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-nav);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

nav ul {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  list-style: none;
  padding: 1rem 0;
}

nav a {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 0.5rem 0;
  position: relative;
}

nav a:hover,
nav a:focus {
  color: var(--primary);
}

nav a::after {
  height: 3px;
  border-radius: 3px;
}

/*Home Section*/
.home-image {
  flex-shrink: 0;
  width: clamp(180px, 30vw, 215px);
  height: auto;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--bg-card);
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  position: relative;
  animation: floatImage 6s ease-in-out infinite;
  will-change: transform;
  max-width: 100%;  
}

@keyframes floatImage {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(12px) rotate(1deg); }
}

.home-image:hover {
  transform: scale(1.03) rotate(2deg);
  box-shadow: 0 20px 25px -5px rgba(79, 70, 229, 0.25);
  animation-play-state: paused;
}

.home-content {
  flex: 1;
  min-width: 0;
  width: 100%;
}

.home-content h1 {
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.home-content p {
  margin-bottom: 0.75rem;
  position: relative;
}

.home-content strong {
  color: var(--text-primary);
  font-weight: 600;
  position: relative;
}


/*About Section - Grid Layout*/
#about .about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

/* Card Styles */
#about .about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  padding: 2rem;
  margin-top: 1rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

#about .about-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

#about .about-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
}

#about .about-card:hover::before {
  opacity: 1;
}

/* Card Typography */
#about .about-card h3 {
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 1.25rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

#about .about-card p {
  max-width: 100%;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

/* Skills List */
#about .skills-list {
  list-style: none;
  padding: 0;
  margin: 0 -0.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

#about .skills-list li {
  background: var(--bg-body);
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid var(--border);
  transition: var(--transition);
  white-space: nowrap;
}

#about .skills-list li:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* Background Grid */
#about .background-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

#about .background-item {
  padding: 1.25rem;
  border-left: 3px solid var(--secondary);
  background: var(--bg-body);
  border-radius: 0 8px 8px 0;
  transition: var(--transition);
}

#about .background-item:hover {
  background: white;
  border-left-color: var(--primary);
  transform: translateX(4px);
}

#about .background-item strong {
  display: block;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  font-size: 1.05rem;
}

#about .background-item span {
  display: block;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 0.75rem;
  font-weight: 500;
}

#about .background-item p {
  font-size: 0.95rem;
  margin-bottom: 0;
  line-height: 1.6;
}

#about .about-card.full-width {
  grid-column: 1 / -1;
  margin-top: 2rem;
}

.about-intro {
  max-width: 100%;
  margin: 2rem 0 3rem 0;
  color: var(--text-secondary);
  line-height: 1.7;
}

.about-intro p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

/*Projects Section*/
#projects article {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

#projects article::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition);
}

#projects article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

#projects article:hover::before {
  opacity: 1;
}

#projects h3 {
  margin-top: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

#projects a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 1rem;
  font-weight: 600;
}

#projects a:hover {
  gap: 0.6rem;
}

/*Contact Section*/
#contact ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

#contact ul li a {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-weight: 500;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

#contact ul li a:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

#contact ul li a:hover::after {
  background: white;
}

/*Form Styling*/
form {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  padding: 2rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  max-width: 600px;
  margin-top: 1.5rem;
}

fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

legend {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border);
  width: 100%;
}

label {
  display: flex;
  flex-direction: column;
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.95rem;
}

input[type="text"],
input[type="email"],
input[type="date"],
textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  background: var(--bg-body);
  color: var(--text-primary);
  transition: var(--transition);
  font-family: inherit;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: white;
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-light);
}

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

input[type="submit"] {
  margin-top: 1.5rem;
  width: auto;
  padding: 0.9rem 2rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-md);
}

input[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 20px -4px rgba(79, 70, 229, 0.4);
}

input[type="submit"]:active {
  transform: translateY(0);
}

/*Footer*/
footer {
  text-align: center;
  padding: 2.5rem 2rem 2rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  border-top: 1px solid var(--border);
  background: var(--bg-card);
  scroll-snap-align: end;
  min-height: auto;
}

footer p {
  margin: 0;
}

/*Responsive Design*/
@media (max-width: 992px) {
  #about .about-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 3.5rem 1.5rem;
  }
  
  html {
    scroll-snap-type: y proximity; 
  }
  
  nav ul {
    gap: 1.5rem;
    flex-wrap: wrap;
  }
  
  #home {
    background-attachment: scroll;
    flex-direction: column;
    text-align: center;
    padding-top: 2rem;
    gap: 2rem;
  }

  .home-image {
    margin-bottom: 1rem;
  }
  
  .home-content h1 {
    justify-content: center;
  }
  
  #contact ul {
    justify-content: center;
  }
  
  form {
    padding: 1.5rem;
  }
  
  input[type="submit"] {
    width: 100%;
  }
  
  /* About Grid Responsive */
  #about {
    background-attachment: scroll;
    background-position: left top !important;
    background-size: cover !important;
  }

  #about .about-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  #about .about-card {
    padding: 1.75rem;
  }
  
  #about .background-grid {
    grid-template-columns: 1fr;
  }
  
  #about .skills-list {
    gap: 0.5rem;
  }
  
  #about .skills-list li {
    font-size: 0.85rem;
    padding: 0.4rem 0.9rem;
  }
}

@media (max-width: 480px) {
  nav ul {
    gap: 1rem;
    font-size: 0.9rem;
  }
  
  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.4rem; }
  
  section {
    padding: 2.5rem 1rem;
  }
  
  #about .about-card {
    padding: 1.5rem;
  }
  
  #about .about-card h3 {
    font-size: 1.15rem;
  }
  
  #about .background-item {
    padding: 1rem;
  }
}

/*Accessibility & Focus States*/
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  html {
    scroll-snap-type: none;
  }
  
  #about .about-card,
  #about .about-card::before,
  #about .skills-list li,
  #about .background-item {
    transition: none !important;
    transform: none !important;
  }
}

:focus-visible {
  outline: 3px solid var(--secondary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Focus for cards */
#about .about-card:focus-visible {
  outline: 3px solid var(--secondary);
  outline-offset: 2px;
}