:root {
  --primary-color: #002957;
  --secondary-color: #6c757d; 
  --text-color: #343a40; 
  --secondary-text-color: #6c757d;
  --background-color: #f4f7fa; 
  --light-background: #ffffff;
  --card-background: #ffffff;
  --border-color: #e9ecef; 
  --shadow-light: rgba(0, 0, 0, 0.08); 
  --transition-speed: 0.3s;
  --accent-color: #285e8e; 
  --gradient-start: #002957; 
  --gradient-end: #016a78; 
  --project-hover-scale: 1.03; 
  --project-hover-shadow: rgba(0, 0, 0, 0.2); 
  --header-bg: #ffffff; 
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--background-color);
  transition: background-color var(--transition-speed) ease,
    color var(--transition-speed) ease;
  cursor: none; /* Hide default cursor */
}

.back-to-top-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: linear-gradient(
    45deg,
    var(--gradient-start),
    var(--gradient-end)
  ); 
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: none;
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  opacity: 0;
  transform: scale(0.8);
  transition: opacity var(--transition-speed) ease,
    transform var(--transition-speed) ease,
    background var(--transition-speed) ease; 
  z-index: 900;
}

.back-to-top-btn:hover {
  background: linear-gradient(
    45deg,
    var(--gradient-end),
    var(--gradient-start)
  ); 
  color: #fff;
  transform: scale(1.1);
}
.bouncing-dots {
  display: flex;
  align-items: center;
  justify-content: center;
}

.dot {
  width: 15px;
  height: 15px;
  background-color: var(--primary-color);
  border-radius: 50%;
  margin: 0 5px;
  animation: bounce 1.4s infinite ease-in-out both;
}

.dot:nth-child(1) {
  animation-delay: -0.32s;
}
.dot:nth-child(2) {
  animation-delay: -0.16s;
}
.dot:nth-child(3) {
  animation-delay: 0s;
}

@keyframes bounce {
  0%,
  80%,
  100% {
    transform: scale(0);
  }
  40% {
    transform: scale(1);
  }
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section-padding {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 60px;
  position: relative;
  color: var(--primary-color);
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--gradient-start),
    var(--gradient-end)
  ); 
  border-radius: 2px;
}


.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: #fff;
  backdrop-filter: blur(10px);
  z-index: 1000;
  box-shadow: 0 2px 10px var(--shadow-light);
  transition: background-color var(--transition-speed) ease;
}
.header img {
  width: 70px;
}
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  gap: 1rem;
}

.language-switch {
  display: flex;
  align-items: center;
}

.language-select {
  border: 1px solid rgba(0, 0, 0, 0.12);
  background-color: #ffffff;
  color: var(--text-color);
  border-radius: 999px;
  padding: 10px 16px;
  cursor: pointer;
  font-weight: 600;
  transition: all var(--transition-speed) ease;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  min-width: 110px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%23002f5c' d='M0 0l5 6 5-6z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 10px 6px;
}

.language-select:hover {
  border-color: rgba(0, 0, 0, 0.18);
}

.language-select:focus {
  outline: none;
  box-shadow: 0 0 0 4px rgba(2, 41, 97, 0.08);
}

.logo {
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--primary-color);
  text-decoration: none;
  display: flex;
  justify-content: center;
  align-items: center;
}

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  flex: 1;
  min-width: 0;
}

.nav-links li {
  margin-left: 30px;
}

.language-switch {
  margin-left: auto;
}

.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  transition: color var(--transition-speed) ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  width: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--gradient-start),
    var(--gradient-end)
  );
  bottom: -5px;
  left: 0;
  transition: width var(--transition-speed) ease;
}

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

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


.hamburger {
  display: none;
  cursor: pointer;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 20px;
}

.hamburger .bar {
  height: 3px;
  width: 100%;
  background-color: var(--text-color);
  border-radius: 5px;
  transition: all var(--transition-speed) ease;
}


.hero-section {
  position: relative;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  overflow: hidden;
  color: #fff;
}

.hero-background-parallax {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url("image/bg.png") no-repeat center center/cover;
  transform: scale(1.1);
  z-index: -1;
}

.hero-content {
  z-index: 1;
  width: 800px;
  padding: 20px;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 10px;
}

.hero-title {
  font-size: 3.5rem;
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero-title .highlight {
  color: #0040ff;
}

.hero-description {
  font-size: 1.3rem;
  margin-bottom: 40px !important;
  min-height: 2em;
  width: 600px;
  margin: 0 auto;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(
    45deg,
    var(--gradient-start),
    var(--gradient-end)
  );
  color: #fff;
  padding: 15px 30px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.1rem;
  transition: transform var(--transition-speed) ease,
    background var(--transition-speed) ease,
    box-shadow var(--transition-speed) ease;
  box-shadow: 0 5px 15px rgba(0, 123, 255, 0.4);
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.cta-button:hover {
  transform: translateY(-5px);
  background: linear-gradient(
    45deg,
    var(--gradient-end),
    var(--gradient-start)
  ); 
  box-shadow: 0 8px 20px rgba(0, 123, 255, 0.6);
}
.text-center {
  text-align: center;
}
.about-section {
  background-color: var(--background-color);
}

.about-content {
  display: flex;
  align-items: center;
  gap: 40px;
}

.about-image {
  flex: 1;
  text-align: center;
}

.about-image img {
  max-width: 350px;
  border-radius: 10px;
  box-shadow: 0 10px 30px var(--shadow-light);
  transition: transform var(--transition-speed) ease;
}

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

.about-text {
  flex: 2;
  font-size: 1.1rem;
  line-height: 1.8;
}

.about-text p {
  margin-bottom: 15px;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-text strong {
  color: var(--primary-color);
}


.skills-section {
  background-color: var(--light-background);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.skill-item {
  background-color: var(--card-background);
  padding: 30px;
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 5px 15px var(--shadow-light);
  transition: transform var(--transition-speed) ease,
    box-shadow var(--transition-speed) ease,
    border-color var(--transition-speed) ease;
  border: 1px solid var(--border-color);
  cursor: pointer;
}

.skill-item:hover {
  transform: translateY(-15px) scale(1.04);
  box-shadow: 0 18px 40px rgba(74, 144, 226, 0.25); 
  border-color: var(--primary-color);
}

.skill-item i {
  font-size: 3.2em;
  color: var(--primary-color);
  margin-bottom: 18px;
  transition: color 0.3s ease, transform 0.3s ease;
}
.skill-item:hover i {
  color: var(--accent-color);
  transform: rotateY(360deg);
}
.skill-item h3 {
  margin-bottom: 10px;
  font-size: 1.6rem;
  color: var(--text-color);
}

.skill-item p {
  font-size: 1.05rem;
  color: var(--secondary-color);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(
    3,
    1fr
  ); 
  gap: 30px;
  min-height: 400px;
}

.project-item {
  background-color: var(--card-background);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px var(--shadow-light);
  transition: transform var(--transition-speed) ease,
    box-shadow var(--transition-speed) ease;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  position: relative;
}

.project-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.project-item:hover {
  transform: translateY(-10px) scale(var(--project-hover-scale)); 
  box-shadow: 0 15px 30px var(--project-hover-shadow); 
}

.project-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  object-position: top;
  display: block;
  transition: object-position 30s ease-in-out;
}

.project-item:hover img {
  object-position: bottom;
}

.project-info {
  padding: 20px;
}

.project-info h3 {
  font-size: 1.5rem;
  margin-bottom: 10px;
  color: var(--primary-color);
}

.project-info p {
  font-size: 0.95rem;
  color: var(--secondary-color);
  margin-bottom: 15px;
}

.project-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: color var(--transition-speed) ease;
}

.project-link i {
  font-size: 1.1rem;
}

.project-link:hover {
  color: var(--accent-color);
}


.filter-buttons {
  text-align: center;
  margin-bottom: 40px;
}

.filter-button {
  background-color: var(--card-background);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  padding: 10px 20px;
  margin: 0 10px;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 500;
  transition: all var(--transition-speed) ease;
}

.filter-button:hover {
  background: linear-gradient(
    45deg,
    var(--gradient-start),
    var(--gradient-end)
  ); 
  color: #fff;
  border-color: transparent;
}

.filter-button.active {
  background: linear-gradient(
    45deg,
    var(--gradient-start),
    var(--gradient-end)
  ); 
  color: #fff;
  border-color: transparent;
  box-shadow: 0 3px 8px rgba(74, 144, 226, 0.3); 
}


#loadMoreProjects {
  margin-top: 40px;
  min-width: 220px;
  display: inline-flex; 
  align-items: center;
  justify-content: center;
  border-radius: 99px;
  padding: 20px;
  background: linear-gradient(
    45deg,
    var(--gradient-start),
    var(--gradient-end)
  ); 
  color: #fff;
  border: none; /* Ensure no border */
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  transition: all var(--transition-speed) ease;
}
#loadMoreProjects:hover {
  background: linear-gradient(
    45deg,
    var(--gradient-end),
    var(--gradient-start)
  ); 
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

#loadMoreProjects .button-text {
  transition: opacity 0.3s ease, transform 0.3s ease;
}

#loadMoreProjects .button-icon {
  transition: opacity 0.3s ease, transform 0.3s ease;
  margin-left: 8px; 
}

#loadMoreProjects.loading .button-text,
#loadMoreProjects.loading .button-icon {
  opacity: 0;
  transform: translateX(-20px);
}

#loadMoreProjects .loading-spinner {
  position: absolute;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top: 4px solid #fff;
  border-radius: 50%;
  width: 30px;
  height: 30px;
  animation: spin 1s linear infinite;
  opacity: 0;
  transform: scale(0);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

#loadMoreProjects.loading .loading-spinner {
  opacity: 1;
  transform: scale(1);
}


.contact-section {
  background-color: var(--light-background);
  text-align: center;
}

.contact-intro {
  font-size: 1.1rem;
  margin-bottom: 50px;
  color: var(--secondary-color);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-bottom: 50px;
}

.contact-card {
  background-color: var(--card-background);
  padding: 35px 25px;
  border-radius: 15px;
  box-shadow: 0 8px 25px var(--shadow-light);
  transition: transform var(--transition-speed) ease,
    box-shadow var(--transition-speed) ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  border: 1px solid var(--border-color);
}

.contact-card:hover {
  transform: translateY(-15px) scale(1.02);
  box-shadow: 0 15px 40px rgba(74, 144, 226, 0.2); 
  border-color: var(--primary-color);
}

.contact-card .icon-wrapper {
  width: 70px;
  height: 70px;
  background: linear-gradient(
    45deg,
    var(--gradient-start),
    var(--gradient-end)
  ); 
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 25px;
  transition: background var(--transition-speed) ease,
   transform var(--transition-speed) ease;
  box-shadow: 0 5px 15px rgba(74, 144, 226, 0.4); 
}

.contact-card:hover .icon-wrapper {
  background: linear-gradient(
    45deg,
    var(--gradient-end),
    var(--gradient-start)
  ); 
  transform: rotateY(360deg);
}

.contact-card .icon-wrapper i {
  font-size: 2.5rem;
  color: #fff;
}

.contact-card h3 {
  font-size: 1.6rem; 
  margin-bottom: 12px;
  color: var(--text-color);
}

.contact-card p {
  font-size: 1rem;
  color: var(--secondary-color);
}

.contact-card a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-speed) ease,
    text-decoration var(--transition-speed) ease;
}

.contact-card a:hover {
  text-decoration: underline;
  color: var(--accent-color);
}

.contact-outro {
  font-size: 1.1rem; 
  color: var(--secondary-color);
  margin-top: 40px; 
}


.footer {
  background-color: var(--header-bg);
  color: var(--text-color);
  text-align: center;
  padding: 25px 0;
  font-size: 0.9rem;
  border-top: 1px solid var(--border-color);
}


.dark-mode-toggle {
  position: fixed;
  bottom: 25px;
  right: 25px;
  background-color: var(--card-background);
  color: var(--primary-color);
  border: 1px solid var(--border-color);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 0 5px 15px var(--shadow-light);
  transition: background-color var(--transition-speed) ease,
    color var(--transition-speed) ease, transform var(--transition-speed) ease;
  z-index: 1001;
}

.dark-mode-toggle:hover {
  transform: scale(1.1);
}


#preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--background-color);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
}

.loader {
  border: 8px solid var(--border-color);
  border-top: 8px solid var(--primary-color);
  border-radius: 50%;
  width: 60px;
  height: 60px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}


.custom-cursor,
.custom-cursor-follower {
  position: fixed;
  top: 0;
  left: 0;
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: 9999;
}

.custom-cursor {
  width: 8px;
  height: 8px;
  background-color: var(--primary-color);
}

.custom-cursor-follower {
  width: 30px;
  height: 30px;
  border: 1px solid var(--primary-color);
  background-color: rgba(36, 99, 170, 0.697);
}

@media (max-width: 992px) {
  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    background-color: #fff;
    position: absolute;
    top: 60px;
    left: 0;
    padding: 20px 0;
    box-shadow: 0 5px 10px var(--shadow-light);
  }

  .nav-links.active {
    display: flex;
  }

  .language-switch {
    order: 3;
    width: 100%;
    justify-content: center;
    margin-top: 15px;
  }

  .hero-description {
    width: 100% !important;
  }
  .nav-links li {
    margin: 10px 0;
    text-align: center;
  }

  .hamburger {
    display: flex;
  }

  .hero-title {
    font-size: 2.8rem;
  }

  .hero-description {
    font-size: 1.1rem;
  }

  .cta-button {
    padding: 12px 25px;
    font-size: 1rem;
  }

  .about-content {
    flex-direction: column;
    text-align: center;
  }

  .about-image {
    margin-bottom: 30px;
  }

  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
  .contact-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }

  .projects-grid {
    grid-template-columns: repeat(
      auto-fit,
      minmax(300px, 1fr)
    ); 
  }
}

@media (max-width: 768px) {
  .section-title {
    font-size: 2rem;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .cta-button {
    padding: 12px 25px;
    font-size: 1rem;
  }

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

  .contact-card {
    padding: 30px 20px;
  }

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

@media (max-width: 576px) {
  .navbar {
    padding: 10px 15px;
  }

  .logo {
    font-size: 1.5rem;
  }

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

  .hero-description {
    font-size: 1rem;
  }

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

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

  .filter-button {
    margin: 5px;
    padding: 8px 15px;
  }
}
.project-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(
    45deg,
    var(--gradient-start),
    var(--gradient-end)
  );
  color: #fff;
  padding: 10px 20px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-speed) ease;
  box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
  border: none;
}

.project-link:hover {
  transform: translateY(-3px);
  background: linear-gradient(
    45deg,
    var(--gradient-end),
    var(--gradient-start)
  );
  box-shadow: 0 6px 18px rgba(74, 144, 226, 0.4);
  color: #fff;
}

.project-link i {
  font-size: 1rem;
  color: #fff;
  transition: transform var(--transition-speed) ease;
}