:root {
  --primary-color: #E6F2FF;
  --secondary-color: #1E3A8A;
  --text-color: #333;
  --bg-color: #fff;
  --dark-bg: #374151;
  --dark-text: #f3f4f6;
  --transition: all 0.3s ease;
}

/* Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: var(--transition);
  line-height: 1.6;
}

body.dark {
  background-color: var(--dark-bg);
  color: var(--dark-text);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--primary-color);
}

::-webkit-scrollbar-thumb {
  background: var(--secondary-color);
  border-radius: 10px;
}

.dark ::-webkit-scrollbar-track {
  background: #4b5563;
}

.dark ::-webkit-scrollbar-thumb {
  background: #1e40af;
}

/* Navigation */
.nasdev-navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.9);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  transition: var(--transition);
}

.dark .nasdev-navbar {
  background-color: rgba(55, 65, 81, 0.9);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.nasdev-brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--secondary-color);
  text-decoration: none;
}

.nasdev-brand span {
  color: black;
}

.dark .nasdev-brand {
  color: var(--primary-color);
}

.nasdev-nav-links {
  display: flex;
  gap: 2rem;
}

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

.dark .nasdev-nav-link {
  color: var(--dark-text);
}

.nasdev-nav-link:hover {
  color: var(--secondary-color);
}

.dark .nasdev-nav-link:hover {
  color: var(--primary-color);
}

.nasdev-nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -5px;
  left: 0;
  background-color: var(--secondary-color);
  transition: var(--transition);
}

.dark .nasdev-nav-link::after {
  background-color: var(--primary-color);
}

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

.nasdev-theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--text-color);
  transition: var(--transition);
  position: absolute;
  left: 40%;
}

.dark .nasdev-theme-toggle {
  color: var(--dark-text);
}

.nasdev-theme-toggle:hover {
  transform: rotate(30deg);
}

.nasdev-hamburger {
  display: none;
  cursor: pointer;
  font-size: 1.5rem;
}

/* Hero Section */
.nasdev-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 0 5%;
  background-color: var(--primary-color);
  position: relative;
  overflow: hidden;
}

.dark .nasdev-hero {
  background-color: #1e3a8a20;
}

.nasdev-hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 3rem;
}

.nasdev-hero-text {
  flex: 1;
}

.nasdev-hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nasdev-profile-img {
  width: 350px;
  height: 350px;
  border-radius: 50%;
  object-fit: cover;
  border: 5px solid var(--bg-color);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
}

.dark .nasdev-profile-img {
  border-color: var(--dark-bg);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.nasdev-hero-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--secondary-color);
}

.dark .nasdev-hero-title {
  color: var(--primary-color);
}

.nasdev-typewriter {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 1.5rem;
  height: 3rem;
}

.dark .nasdev-typewriter {
  color: var(--dark-text);
}

.nasdev-hero-bio {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  max-width: 600px;
  opacity: 0.9;
}

.nasdev-social-links {
  display: flex;
  gap: 1.5rem;
  margin-top: 2rem;
}

.nasdev-social-link {
  font-size: 1.5rem;
  color: var(--secondary-color);
  transition: var(--transition);
}

.dark .nasdev-social-link {
  color: var(--primary-color);
}

.nasdev-social-link:hover {
  transform: translateY(-5px);
  color: var(--text-color);
}

.dark .nasdev-social-link:hover {
  color: var(--dark-text);
}

/* About Section */
.nasdev-about {
  padding: 5rem 5%;
  background-color: var(--bg-color);
}

.dark .nasdev-about {
  background-color: var(--dark-bg);
}

.nasdev-section-title {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--secondary-color);
  position: relative;
}

.dark .nasdev-section-title {
  color: var(--primary-color);
}

.nasdev-section-title::after {
  content: '';
  position: absolute;
  width: 80px;
  height: 3px;
  background-color: var(--secondary-color);
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
}

.dark .nasdev-section-title::after {
  background-color: var(--primary-color);
}

.nasdev-about-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.nasdev-about-text {
  margin-bottom: 3rem;
  font-size: 1.1rem;
  line-height: 1.8;
}

.nasdev-stats {
  display: flex;
  justify-content: space-around;
  width: 100%;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.nasdev-stat-card {
  background-color: var(--primary-color);
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  min-width: 200px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

.dark .nasdev-stat-card {
  background-color: #1e3a8a20;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.nasdev-stat-card:hover {
  transform: translateY(-10px);
}

.nasdev-stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--secondary-color);
  margin-bottom: 0.5rem;
}

.dark .nasdev-stat-number {
  color: var(--primary-color);
}

.nasdev-stat-label {
  font-size: 1rem;
  color: var(--text-color);
  opacity: 0.8;
}

.dark .nasdev-stat-label {
  color: var(--dark-text);
}

/* Skills Section */
.nasdev-skills {
  padding: 5rem 5%;
  background-color: var(--primary-color);
}

.dark .nasdev-skills {
  background-color: #1e3a8a20;
}

.nasdev-skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.nasdev-skill-card {
  background-color: var(--bg-color);
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
  position: relative;
  cursor: pointer;
}

.dark .nasdev-skill-card {
  background-color: var(--dark-bg);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.nasdev-skill-card:hover {
  transform: translateY(-5px);
}

.nasdev-skill-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--secondary-color);
}

.dark .nasdev-skill-icon {
  color: var(--primary-color);
}

.nasdev-skill-name {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.nasdev-skill-tooltip {
  position: absolute;
  bottom: -50px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--secondary-color);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  font-size: 0.9rem;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  width: 80%;
  z-index: 10;
}

.dark .nasdev-skill-tooltip {
  background-color: var(--primary-color);
  color: var(--dark-bg);
}

.nasdev-skill-card:hover .nasdev-skill-tooltip {
  opacity: 1;
  visibility: visible;
  bottom: -40px;
}

/* Projects Section */
.nasdev-projects {
  padding: 5rem 5%;
  background-color: var(--bg-color);
}

.dark .nasdev-projects {
  background-color: var(--dark-bg);
}

.nasdev-projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.nasdev-project-card {
  background-color: var(--primary-color);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

.dark .nasdev-project-card {
  background-color: #1e3a8a20;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

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

.dark .nasdev-project-card:hover {
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

.nasdev-project-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.nasdev-project-content {
  padding: 1.5rem;
}

.nasdev-project-title {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: var(--secondary-color);
}

.dark .nasdev-project-title {
  color: var(--primary-color);
}

.nasdev-project-description {
  margin-bottom: 1.5rem;
  color: var(--text-color);
}

.dark .nasdev-project-description {
  color: var(--dark-text);
}

.nasdev-project-tech {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.nasdev-tech-icon {
  font-size: 1.5rem;
  color: var(--secondary-color);
}

.dark .nasdev-tech-icon {
  color: var(--primary-color);
}

.nasdev-project-buttons {
  display: flex;
  gap: 1rem;
}

.nasdev-project-btn {
  padding: 0.5rem 1rem;
  border-radius: 5px;
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nasdev-project-btn-primary {
  background-color: var(--secondary-color);
  color: white;
}

.dark .nasdev-project-btn-primary {
  background-color: var(--primary-color);
  color: var(--dark-bg);
}

.nasdev-project-btn-secondary {
  background-color: transparent;
  border: 1px solid var(--secondary-color);
  color: var(--secondary-color);
}

.dark .nasdev-project-btn-secondary {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.nasdev-project-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
}

/* Contact Section */
.nasdev-contact {
  padding: 5rem 5%;
  background-color: var(--primary-color);
}

.dark .nasdev-contact {
  background-color: #1e3a8a20;
}

.nasdev-contact-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 3rem;
  max-width: 1200px;
  margin: 0 auto;
}

.nasdev-contact-form {
  background-color: var(--bg-color);
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.dark .nasdev-contact-form {
  background-color: var(--dark-bg);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

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

.nasdev-form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-color);
}

.dark .nasdev-form-label {
  color: var(--dark-text);
}

.nasdev-form-input,
.nasdev-form-textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 1rem;
  transition: var(--transition);
  background-color: var(--bg-color);
  color: var(--text-color);
}

.dark .nasdev-form-input,
.dark .nasdev-form-textarea {
  background-color: #4b5563;
  border-color: #6b7280;
  color: var(--dark-text);
}

.nasdev-form-input:focus,
.nasdev-form-textarea:focus {
  outline: none;
  border-color: var(--secondary-color);
  box-shadow: 0 0 0 2px rgba(30, 58, 138, 0.2);
}

.dark .nasdev-form-input:focus,
.dark .nasdev-form-textarea:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(230, 242, 255, 0.2);
}

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

.nasdev-submit-btn {
  background-color: var(--secondary-color);
  color: white;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 5px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.dark .nasdev-submit-btn {
  background-color: var(--primary-color);
  color: var(--dark-bg);
}

.nasdev-submit-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.nasdev-contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

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

.nasdev-contact-method {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nasdev-contact-icon {
  font-size: 1.5rem;
  color: var(--secondary-color);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: rgba(30, 58, 138, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.dark .nasdev-contact-icon {
  color: var(--primary-color);
  background-color: rgba(230, 242, 255, 0.1);
}

.nasdev-contact-method:hover .nasdev-contact-icon {
  background-color: var(--secondary-color);
  color: white;
  transform: scale(1.1);
}

.dark .nasdev-contact-method:hover .nasdev-contact-icon {
  background-color: var(--primary-color);
  color: var(--dark-bg);
}

.nasdev-contact-details h4 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
  color: var(--secondary-color);
}

.dark .nasdev-contact-details h4 {
  color: var(--primary-color);
}

.nasdev-contact-details p {
  color: var(--text-color);
  opacity: 0.8;
}

.dark .nasdev-contact-details p {
  color: var(--dark-text);
}

.nasdev-map {
  height: 250px;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.dark .nasdev-map {
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.nasdev-map iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* Footer */
.nasdev-footer {
  background-color: var(--secondary-color);
  color: white;
  text-align: center;
  padding: 2rem 5%;
}

.dark .nasdev-footer {
  background-color: #1e1b4b;
}

.nasdev-footer-content {
  max-width: 800px;
  margin: 0 auto;
}

.nasdev-footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin: 1.5rem 0;
}

.nasdev-footer-link {
  color: white;
  text-decoration: none;
  transition: var(--transition);
}

.nasdev-footer-link:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

.nasdev-copyright {
  opacity: 0.8;
  font-size: 0.9rem;
}

/* Utility Components */
.nasdev-back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background-color: var(--secondary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  left: 50%;
}

.suampeng {
  position: absolute;
  left: 120%;
  top: 20%;
}

.dark .nasdev-back-to-top {
  background-color: var(--primary-color);
  color: var(--dark-bg);
}

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

.nasdev-back-to-top:hover {
  transform: translateY(-5px);
}

.nasdev-download-cv {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  background-color: var(--secondary-color);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  z-index: 999;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.dark .nasdev-download-cv {
  background-color: var(--primary-color);
  color: var(--dark-bg);
}

.nasdev-download-cv:hover {
  transform: translateY(-5px);
}

.nasdev-scroll-indicator {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background-color: var(--secondary-color);
  z-index: 1000;
  transition: width 0.3s ease;
}

.dark .nasdev-scroll-indicator {
  background-color: var(--primary-color);
}

/* Animations */
@keyframes float {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-15px);
  }
  100% {
    transform: translateY(0px);
  }
}

.nasdev-float {
  animation: float 6s ease-in-out infinite;
}

/* Particle Background */
.nasdev-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: hidden;
}

.nasdev-particle {
  position: absolute;
  background-color: rgba(30, 58, 138, 0.1);
  border-radius: 50%;
  animation: float 15s infinite linear;
}

.dark .nasdev-particle {
  background-color: rgba(230, 242, 255, 0.1);
}

/* Typewriter Effect */
.nasdev-typewriter-cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background-color: var(--secondary-color);
  margin-left: 2px;
  animation: blink 1s infinite;
}

.dark .nasdev-typewriter-cursor {
  background-color: var(--primary-color);
}

@keyframes blink {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

/* Chatbot Styles */
.nasyuwa-chatbot-container {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  width: 80%;
  height: 500px;
  margin: 20px auto;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  background-color: #f9f9f9;
  display: flex;
  flex-direction: column;
}

.nasyuwa-chatbot-header {
  background-color: skyblue;
  color: white;
  padding: 8px 12px;
  font-size: 0.9em;
  font-weight: bold;
}

.nasyuwa-chatbot-messages {
  flex-grow: 1;
  overflow-y: auto;
  padding: 8px;
  font-size: 0.8em;
  color: black;
}

.nasyuwa-chatbot-input-area {
  display: flex;
  padding: 5px;
  border-top: 1px solid #e0e0e0;
  background-color: white;
}

#nasyuwa-user-input {
  flex-grow: 1;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 5px;
  font-size: 0.8em;
}

#nasyuwa-send-btn {
  background-color: skyblue;
  color: white;
  border: none;
  border-radius: 4px;
  padding: 5px 10px;
  margin-left: 5px;
  cursor: pointer;
  font-size: 0.8em;
}

.nasyuwa-message {
  margin-bottom: 5px;
  padding: 4px 6px;
  border-radius: 4px;
  font-size: 0.8em;
  line-height: 1.3;
}

.nasyuwa-user-message {
  background-color: #e3f2fd;
  align-self: flex-end;
  max-width: 80%;
}

.nasyuwa-bot-message {
  background-color: #f1f1f1;
  align-self: flex-start;
  max-width: 80%;
}

/* Responsive Design */
@media (max-width: 992px) {
  .nasdev-hero-content {
    flex-direction: column-reverse;
    text-align: center;
  }

  .nasdev-social-links {
    justify-content: center;
  }

  .nasdev-profile-img {
    width: 250px;
    height: 250px;
    margin-bottom: 2rem;
  }

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

  .nasdev-typewriter {
    font-size: 1.5rem;
    height: 2.5rem;
  }
}

@media (max-width: 768px) {
  .nasdev-nav-links {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background-color: var(--bg-color);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3rem;
    transition: var(--transition);
    z-index: 999;
  }

  .dark .nasdev-nav-links {
    background-color: var(--dark-bg);
  }

  .nasdev-nav-links.active {
    left: 0;
  }

  .nasdev-hamburger {
    display: block;
    position: absolute;
    left: 60%;
  }

  .nasdev-stats {
    flex-direction: column;
    align-items: center;
  }

  .nasdev-stat-card {
    width: 100%;
  }

  .nasdev-skills-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 576px) {
  .nasdev-hero-title {
    font-size: 1.8rem;
  }

  .nasdev-typewriter {
    font-size: 1.3rem;
    height: 2rem;
  }

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

  .nasdev-project-buttons {
    flex-direction: column;
  }

  .nasdev-download-cv {
    bottom: 6rem;
  }
}