/* Main CSS for Bellapu Ravvala Sricharan's Resume Website - Black & White Professional Theme */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700&family=Roboto:wght@300;400;500;700&display=swap');

/* Base Styles */
:root {
  --primary-color: #000000;
  --secondary-color: #333333;
  --accent-color: #666666;
  --light-color: #ffffff;
  --gray-color: #aaaaaa;
  --border-color: #dddddd;
  --success-color: #2e7d32;
  --section-padding: 5rem 0;
  --transition-speed: 0.3s;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  cursor: none; /* Hide default cursor */
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--primary-color);
  background-color: var(--light-color);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

a {
  text-decoration: none;
  color: var(--primary-color);
  transition: all var(--transition-speed) ease;
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 0;
  cursor: none;
  transition: all var(--transition-speed) ease;
  font-weight: 500;
  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: all 0.5s ease;
}

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

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

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

.section {
  padding: var(--section-padding);
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.section-title h2 {
  font-size: 2.5rem;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 2px;
  background-color: var(--primary-color);
}

/* Custom Cursor */
.cursor {
  width: 20px;
  height: 20px;
  border: 2px solid var(--primary-color);
  border-radius: 50%;
  position: fixed;
  transform: translate(-50%, -50%);
  pointer-events: none;
  transition: all 0.1s ease;
  z-index: 9999;
  backdrop-filter: invert(100%);
}

.cursor-dot {
  width: 4px;
  height: 4px;
  background-color: var(--primary-color);
  border-radius: 50%;
  position: fixed;
  transform: translate(-50%, -50%);
  pointer-events: none;
  transition: all 0.15s ease-out;
  z-index: 10000;
}

.expand {
  transform: translate(-50%, -50%) scale(2);
  background: rgba(0, 0, 0, 0.1);
  border: 1px solid var(--primary-color);
}

/* Header Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  transition: all var(--transition-speed) ease;
}

.header.scrolled {
  padding: 0.5rem 0;
  background-color: rgba(255, 255, 255, 0.98);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
  position: relative;
  overflow: hidden;
}

.logo::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width 0.5s ease;
}

.logo:hover::after {
  width: 100%;
}

.nav-menu {
  display: flex;
  list-style: none;
}

.nav-item {
  margin-left: 2rem;
}

.nav-link {
  font-weight: 500;
  color: var(--primary-color);
  position: relative;
  padding: 5px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.hamburger {
  display: none;
  cursor: none;
}

.hamburger .bar {
  display: block;
  width: 25px;
  height: 2px;
  margin: 5px auto;
  background-color: var(--primary-color);
  transition: all 0.3s ease;
}

.hamburger.active .bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active .bar:nth-child(2) {
  opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero Section */
.hero {
  height: 100vh;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.9), rgba(51, 51, 51, 0.9)), url('../images/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  color: white;
  display: flex;
  align-items: center;
  text-align: center;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    45deg,
    rgba(0, 0, 0, 0.03),
    rgba(0, 0, 0, 0.03) 10px,
    rgba(0, 0, 0, 0) 10px,
    rgba(0, 0, 0, 0) 20px
  );
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  color: white;
  position: relative;
  display: inline-block;
}

.hero-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 50%;
  height: 2px;
  background-color: white;
}

.hero-subtitle {
  font-size: 1.5rem;
  margin-bottom: 2rem;
  color: rgba(255, 255, 255, 0.9);
}

.hero-btns {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

/* About Section */
.about-content {
  display: flex;
  align-items: center;
  gap: 3rem;
}

.about-img {
  flex: 1;
  border-radius: 0;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  position: relative;
  transition: all 0.5s ease;
}

.about-img:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.about-img img {
  width: 100%;
  height: auto;
  display: block;
  transition: all 0.5s ease;
}

.about-img:hover img {
  transform: scale(1.05);
}

.about-text {
  flex: 1;
}

.about-text p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 0;
  background-color: var(--primary-color);
  color: white;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

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

.social-link:hover::before {
  left: 100%;
}

.social-link:hover {
  transform: translateY(-5px);
}

/* Education Section */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::after {
  content: '';
  position: absolute;
  width: 2px;
  background-color: var(--primary-color);
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -1px;
}

.timeline-item {
  padding: 10px 40px;
  position: relative;
  width: 50%;
  transition: all 0.5s ease;
}

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

.timeline-item::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  background-color: var(--light-color);
  border: 2px solid var(--primary-color);
  border-radius: 50%;
  top: 15px;
  z-index: 1;
  transition: all 0.3s ease;
}

.timeline-item:hover::after {
  background-color: var(--primary-color);
  transform: scale(1.2);
}

.timeline-item.left {
  left: 0;
}

.timeline-item.right {
  left: 50%;
}

.timeline-item.left::after {
  right: -10px;
}

.timeline-item.right::after {
  left: -10px;
}

.timeline-content {
  padding: 20px;
  background-color: white;
  border: 1px solid var(--border-color);
  border-radius: 0;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.timeline-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0;
  background-color: rgba(0, 0, 0, 0.02);
  transition: height 0.5s ease;
  z-index: 0;
}

.timeline-content:hover::before {
  height: 100%;
}

.timeline-logo {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin-bottom: 1rem;
  transition: all 0.3s ease;
}

.timeline-content:hover .timeline-logo {
  transform: scale(1.1);
}

.timeline-date {
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.timeline-title {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  position: relative;
  z-index: 1;
}

.timeline-location {
  font-style: italic;
  color: var(--accent-color);
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

/* Experience Section */
.experience-item {
  margin-bottom: 3rem;
  padding: 2rem;
  background-color: white;
  border: 1px solid var(--border-color);
  border-radius: 0;
  box-shadow: 0 3px 15px rgba(0, 0, 0, 0.05);
  transition: all 0.5s ease;
  position: relative;
  overflow: hidden;
}

.experience-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 0;
  background-color: var(--primary-color);
  transition: height 0.5s ease;
}

.experience-item:hover::before {
  height: 100%;
}

.experience-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.experience-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.experience-logo {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin-bottom: 1rem;
  transition: all 0.3s ease;
}

.experience-item:hover .experience-logo {
  transform: scale(1.1);
}

.experience-company {
  font-size: 1.3rem;
  font-weight: 600;
}

.experience-duration {
  color: var(--primary-color);
  font-weight: 500;
}

.experience-position {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.experience-location {
  color: var(--accent-color);
  font-style: italic;
  margin-bottom: 1rem;
}

/* Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.project-card {
  background-color: white;
  border: 1px solid var(--border-color);
  border-radius: 0;
  overflow: hidden;
  box-shadow: 0 3px 15px rgba(0, 0, 0, 0.05);
  transition: all 0.5s ease;
  position: relative;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0;
  background-color: rgba(0, 0, 0, 0.02);
  transition: height 0.5s ease;
  z-index: 0;
}

.project-card:hover::before {
  height: 100%;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.project-img {
  width: 100%;
  height: 200px;
  background-color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2rem;
  transition: all 0.5s ease;
  position: relative;
  overflow: hidden;
}

.project-img i {
  transition: all 0.5s ease;
}

.project-card:hover .project-img i {
  transform: scale(1.2);
}

.project-content {
  padding: 1.5rem;
  position: relative;
  z-index: 1;
}

.project-title {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  position: relative;
  display: inline-block;
}

.project-title::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width 0.5s ease;
}

.project-card:hover .project-title::after {
  width: 100%;
}

.project-tech {
  color: var(--primary-color);
  font-weight: 500;
  margin-bottom: 1rem;
}

.project-description {
  margin-bottom: 1.5rem;
}

/* Skills Section */
.skills-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 2rem;
}

.skill-category {
  margin-bottom: 2rem;
}

.skill-category-title {
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
  color: var(--primary-color);
  position: relative;
  display: inline-block;
}

.skill-category-title::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 50px;
  height: 2px;
  background-color: var(--primary-color);
  transition: width 0.5s ease;
}

.skill-category:hover .skill-category-title::after {
  width: 100%;
}

.skill-item {
  margin-bottom: 1.5rem;
  position: relative;
}

.skill-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.skill-name {
  font-weight: 500;
}

.skill-bar {
  height: 8px;
  background-color: var(--border-color);
  border-radius: 0;
  overflow: hidden;
  position: relative;
}

.skill-progress {
  height: 100%;
  background-color: var(--primary-color);
  border-radius: 0;
  transition: width 1.5s ease;
  position: relative;
}

.skill-progress::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 5px;
  height: 100%;
  background-color: var(--light-color);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
  100% {
    opacity: 1;
  }
}

/* Awards Section */
.awards-list {
  max-width: 800px;
  margin: 0 auto;
}

.award-item {
  background-color: white;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 0;
  box-shadow: 0 3px 15px rgba(0, 0, 0, 0.05);
  margin-bottom: 2rem;
  transition: all 0.5s ease;
  position: relative;
  overflow: hidden;
}

.award-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 0;
  background-color: var(--primary-color);
  transition: height 0.5s ease;
}

.award-item:hover::before {
  height: 100%;
}

.award-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.award-title {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.award-issuer {
  color: var(--accent-color);
  font-style: italic;
}

/* Certificates Section */
.certificates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 2rem;
}

.certificate-card {
  background-color: white;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 0;
  box-shadow: 0 3px 15px rgba(0, 0, 0, 0.05);
  transition: all 0.5s ease;
  position: relative;
  overflow: hidden;
}

.certificate-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0;
  background-color: rgba(0, 0, 0, 0.02);
  transition: height 0.5s ease;
  z-index: 0;
}

.certificate-card:hover::before {
  height: 100%;
}

.certificate-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.certificate-title {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  position: relative;
  z-index: 1;
}

.certificate-issuer {
  color: var(--accent-color);
  font-style: italic;
  position: relative;
  z-index: 1;
}

/* Contact Section */
.contact-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 3rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all 0.3s ease;
}

.contact-item:hover {
  transform: translateX(10px);
}

.contact-icon {
  width: 50px;
  height: 50px;
  background-color: var(--primary-color);
  border-radius: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
  transition: all 0.3s ease;
}

.contact-item:hover .contact-icon {
  transform: rotate(360deg);
}

.contact-text h3 {
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
}

.contact-form {
  background-color: white;
  padding: 2rem;
  border: 1px solid var(--border-color);
  border-radius: 0;
  box-shadow: 0 3px 15px rgba(0, 0, 0, 0.05);
}

.form-group {
  margin-bottom: 1.5rem;
  position: relative;
}

.form-control {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid var(--border-color);
  border-radius: 0;
  font-family: inherit;
  font-size: 1rem;
  transition: all 0.3s ease;
  background-color: transparent;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.1);
}

.form-control::placeholder {
  color: var(--accent-color);
  opacity: 0.7;
}

textarea.form-control {
  resize: vertical;
  min-height: 150px;
}

/* Footer */
.footer {
  background-color: var(--primary-color);
  color: white;
  padding: 3rem 0;
  text-align: center;
}

.footer-content {
  max-width: 600px;
  margin: 0 auto;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 2rem 0;
}

.footer-social a {
  color: white;
  font-size: 1.5rem;
  transition: all 0.3s ease;
  position: relative;
}

.footer-social a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: white;
  transition: width 0.3s ease;
}

.footer-social a:hover::after {
  width: 100%;
}

.footer-text {
  color: rgba(255, 255, 255, 0.7);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background-color: var(--primary-color);
  color: white;
  border-radius: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: none;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 999;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--secondary-color);
  transform: translateY(-5px);
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1s ease, transform 1s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 {
  transition-delay: 0.2s;
}

.delay-2 {
  transition-delay: 0.4s;
}

.delay-3 {
  transition-delay: 0.6s;
}

/* Hover Effects */
.hover-lift {
  transition: transform 0.3s ease;
}

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

.hover-scale {
  transition: transform 0.3s ease;
}

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

.hover-rotate {
  transition: transform 0.5s ease;
}

.hover-rotate:hover {
  transform: rotate(5deg);
}

/* Responsive Styles */
@media screen and (max-width: 992px) {
  .about-content {
    flex-direction: column;
  }
  
  .timeline::after {
    left: 31px;
  }
  
  .timeline-item {
    width: 100%;
    padding-left: 70px;
    padding-right: 25px;
  }
  
  .timeline-item.right {
    left: 0;
  }
  
  .timeline-item.left::after,
  .timeline-item.right::after {
    left: 21px;
  }
}

@media screen and (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background-color: white;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    transition: all 0.3s ease;
    z-index: 999;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-item {
    margin: 0;
  }
  
  .hamburger {
    display: block;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.2rem;
  }
  
  .section-title h2 {
    font-size: 2rem;
  }
  
  .cursor, .cursor-dot {
    display: none;
  }
  
  * {
    cursor: auto !important;
  }
}

@media screen and (max-width: 576px) {
  .hero-btns {
    flex-direction: column;
    gap: 1rem;
  }
  
  .experience-header {
    flex-direction: column;
    gap: 0.5rem;
  }
}