/* Reset and Base Styles */

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

html {
  scroll-behavior: smooth;
  max-width: 100%;
  overflow-x: hidden;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #ffffff;
  max-width: 100%;
  overflow-x: hidden;
}

/* Custom Properties */
:root {
  --primary-color: #3b82f6;
  --secondary-color: #1e40af;
  --accent-color: #f59e0b;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-dark: #0f172a;
  --border-color: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1),
    0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1),
    0 8px 10px -6px rgb(0 0 0 / 0.1);
  --border-radius: 8px;
  --border-radius-lg: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

/* Utility Classes */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.text-gradient {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--accent-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-red {
  color: #ef4444;
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  font-size: 16px;
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.btn-outline:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary-color);
}

.nav-menu {
  display: flex;
  gap: 32px;
}

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

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: var(--transition);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.bar {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  padding-top: 70px;
}

.hero-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-text {
  animation: fadeInUp 1s ease-out;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.hero-image {
  display: flex;
  justify-content: center;
  position: relative;
  animation: fadeInRight 1s ease-out 0.3s both;
}

.image-container {
  position: relative;
  width: 350px;
  height: 350px;
}

.profile-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  box-shadow: var(--shadow-xl);
  border: 8px solid white;
}

.floating-elements {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.floating-element {
  position: absolute;
  background: white;
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 14px;
  box-shadow: var(--shadow-md);
  animation: float 3s ease-in-out infinite;
}

.floating-element.python {
  top: 20%;
  left: -10%;
  background: linear-gradient(135deg, #3776ab, #ffd43b);
  color: white;
  animation-delay: 0s;
}

.floating-element.php {
  top: 10%;
  right: -15%;
  background: linear-gradient(135deg, #777bb4, #8892bf);
  color: white;
  animation-delay: 0.5s;
}

.floating-element.js {
  bottom: 30%;
  left: -15%;
  background: linear-gradient(135deg, #f7df1e, #ffed4e);
  color: #333;
  animation-delay: 1s;
}

.floating-element.ml {
  bottom: 10%;
  right: -10%;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--accent-color)
  );
  color: white;
  animation-delay: 1.5s;
}

.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-link {
  display: block;
  width: 30px;
  height: 50px;
  border: 2px solid var(--primary-color);
  border-radius: 25px;
  position: relative;
  text-decoration: none;
}

.scroll-down {
  position: absolute;
  top: 8px;
  left: 50%;
  width: 6px;
  height: 6px;
  background: var(--primary-color);
  border-radius: 50%;
  transform: translateX(-50%);
  animation: scrollDown 2s infinite;
}

/* Section Styles */
section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* About Section */
.about {
  background: var(--bg-secondary);
}

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

.about-text p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.7;
}

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

.stat-item {
  text-align: center;
  padding: 20px;
  background: white;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.stat-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 8px;
}

.about-image img {
  width: 100%;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

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

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  margin-bottom: 50px;
  position: relative;
}

.timeline-item:nth-child(odd) {
  flex-direction: row-reverse;
}

.timeline-item:nth-child(odd) .timeline-content {
  margin-right: 30px;
  text-align: right;
}

.timeline-item:nth-child(even) .timeline-content {
  margin-left: 30px;
}

.timeline-dot {
  position: absolute;
  left: 50%;
  width: 16px;
  height: 16px;
  background: var(--primary-color);
  border-radius: 50%;
  border: 4px solid white;
  box-shadow: var(--shadow-md);
  transform: translateX(-50%);
  z-index: 2;
}

.timeline-dot.education {
  background: var(--accent-color);
}

.timeline-content {
  background: white;
  padding: 30px;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  width: calc(50% - 30px);
  transition: var(--transition);
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.timeline-date {
  color: var(--primary-color);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.timeline-content h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 5px;
}

.timeline-content h4 {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 15px;
}

.timeline-content p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 15px;
}

.timeline-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  background: var(--bg-secondary);
  color: var(--primary-color);
  padding: 4px 12px;
  border-radius: 16px;
  font-size: 0.8rem;
  font-weight: 500;
}
/* Tab Navigation */
.tab-navigation {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 50px;
}

.tab-btn {
  padding: 12px 30px;
  border: 2px solid var(--primary-color);
  background: transparent;
  color: var(--primary-color);
  border-radius: 25px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn.active,
.tab-btn:hover {
  background: var(--primary-color);
  color: white;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Mobile responsiveness for tabs */
@media (max-width: 480px) {
  .tab-navigation {
    flex-direction: column;
    align-items: center;
    gap: 15px;
  }

  .tab-btn {
    width: 200px;
  }
}

/* Projects Section */
.projects {
  background: var(--bg-secondary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.project-card {
  background: white;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.project-card.featured {
  grid-column: span 2;
}

.project-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.project-card.featured .project-image {
  height: 250px;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}
/*  specifically target Kazi Kazini logo */
.project-image img[alt*="Kazi Kazini"] {
  object-fit: contain !important;
  background: white;
  padding: 20px;
}

.project-card:hover .project-image img {
  transform: scale(1.1);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-links {
  display: flex;
  gap: 15px;
}

.project-link {
  width: 50px;
  height: 50px;
  background: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

.project-link:hover {
  background: var(--primary-color);
  color: white;
  transform: scale(1.1);
}

.project-content {
  padding: 25px;
}

.project-category {
  color: var(--primary-color);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.project-content h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 15px;
}

.project-content p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.tech-tag {
  background: var(--bg-secondary);
  color: var(--primary-color);
  padding: 6px 12px;
  border-radius: 16px;
  font-size: 0.8rem;
  font-weight: 500;
}

.project-features h4 {
  color: var(--text-primary);
  font-size: 1rem;
  margin-bottom: 10px;
}

.project-features ul {
  list-style: none;
  padding: 0;
}

.project-features li {
  color: var(--text-secondary);
  margin-bottom: 8px;
  padding-left: 20px;
  position: relative;
}

.project-features li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

/* Skills Section */
.skills-content {
  display: grid;
  gap: 40px;
}

.skill-category h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  color: var(--text-primary);
  margin-bottom: 25px;
}

.skill-category h3 i {
  color: var(--primary-color);
}

.skill-items {
  display: grid;
  gap: 20px;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: 20px;
}

.skill-name {
  min-width: 120px;
  font-weight: 500;
  color: var(--text-primary);
}

.skill-bar {
  flex: 1;
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--accent-color)
  );
  border-radius: 4px;
  width: 0;
  transition: width 1s ease-out;
}

.skill-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 15px;
}

.certifications {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.cert-item {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 20px;
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.cert-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.cert-item i {
  font-size: 1.5rem;
  color: var(--primary-color);
}

/* Contact Section */
.contact {
  background: var(--bg-secondary);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-bottom: 50px;
}

.contact-info {
  display: grid;
  gap: 30px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 25px;
  background: white;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.contact-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

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

.contact-details h3 {
  color: var(--text-primary);
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.contact-details p {
  color: var(--text-secondary);
  margin-bottom: 5px;
}

.contact-form {
  background: white;
  padding: 40px;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 25px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 15px;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 16px;
  transition: var(--transition);
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

.social-link {
  width: 50px;
  height: 50px;
  background: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  text-decoration: none;
  font-size: 1.2rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.social-link:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* Footer */
.footer {
  background: var(--bg-dark);
  color: white;
  padding: 30px 0;
  text-align: center;
}

.footer-content p {
  margin-bottom: 5px;
  color: #9ca3af;
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
  z-index: 1000;
}

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

.back-to-top:hover {
  background: var(--secondary-color);
  transform: translateY(-3px);
}

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

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes scrollDown {
  0% {
    transform: translateX(-50%) translateY(0);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: translateX(-50%) translateY(20px);
    opacity: 0;
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: white;
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: var(--shadow-lg);
    padding: 20px 0;
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-toggle {
    display: flex;
  }

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

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

  .nav-toggle.active .bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
  .scroll-indicator {
    bottom: 16px; /* More space above About section */
  }
  .hero-buttons {
    margin-bottom: 20px;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero-content > div:first-child {
    order: 2;
  }

  .hero-content > div:last-child {
    order: 1;
  }

  .image-container {
    width: 280px;
    height: 280px;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    flex-direction: column;
    padding-left: 50px;
  }

  .timeline-item:nth-child(odd) {
    flex-direction: column;
  }

  .timeline-item:nth-child(odd) .timeline-content {
    margin-right: 0;
    text-align: left;
  }

  .timeline-item:nth-child(even) .timeline-content {
    margin-left: 0;
  }

  .timeline-dot {
    left: 20px;
    transform: translateX(-50%);
  }

  .timeline-content {
    width: 100%;
    margin-left: 0 !important;
    margin-right: 0 !important;
  }

  .project-card.featured {
    grid-column: span 1;
  }

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

  .contact-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-buttons {
    justify-content: center;
  }

  .skill-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .skill-name {
    min-width: auto;
  }

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

  section {
    padding: 60px 0;
  }

  .contact {
    width: 100%;
    overflow-x: hidden;
  }

  .contact-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
    width: 100%;
    padding: 0 15px;
    box-sizing: border-box;
  }

  .contact-info,
  .contact-form {
    width: 100%;
    box-sizing: border-box;
  }

  .contact-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 15px;
  }

  .form-group input,
  .form-group textarea {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }

  .hero-title {
    font-size: 2rem;
  }

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

  .section-title {
    font-size: 1.8rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .image-container {
    width: 250px;
    height: 250px;
  }

  .floating-element {
    font-size: 12px;
    padding: 6px 12px;
  }

  .timeline-content {
    padding: 20px;
  }

  .project-content {
    padding: 20px;
  }

  .contact-content {
    padding: 0 2px;
  }
  .contact-item {
    /* width: 100%; */
    /* margin-right: 4px; */
    box-sizing: border-box;
  }

  .contact-form {
    padding: 8px;
  }

  .form-group input,
  .form-group textarea {
    font-size: 15px;
  }
}