/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Custom Color Theme */
  --color-text: #e2e8f0;
  --color-text-secondary: #94a3b8;
  --color-bg: #0f0f23;
  --color-bg-alt: #1a1a2e;
  --color-bg-deep: #16213e;
  --color-bg-overlay: rgba(15, 15, 35, 0.95);

  --color-primary: #65a6fb;
  --color-primary-rgba: rgba(101, 166, 251, 0.3);
  --color-primary-light: rgba(101, 166, 251, 0.1);
  --color-primary-border: rgba(101, 166, 251, 0.2);

  --color-secondary: #9333ea;
  --color-accent-green: #10b981;
  --color-accent-orange: #f59e0b;

  --color-card-bg: rgba(15, 15, 35, 0.8);
  --color-section-bg: rgba(26, 26, 46, 0.5);
  --color-form-bg: rgba(15, 15, 35, 0.6);
  --color-form-input-bg: rgba(15, 15, 35, 0.8);
  --color-footer-bg: rgba(15, 15, 35, 0.9);

  --color-shadow: rgba(101, 166, 251, 0.3);
  --color-shadow-hover: rgba(101, 166, 251, 0.4);

  /* Light theme overrides */
  --light-bg-primary: #ffffff;
  --light-bg-secondary: #f8fafc;
  --light-text-primary: #1e293b;
  --light-text-secondary: #64748b;
  --light-border-color: #e2e8f0;
  --light-card-bg: #ffffff;
  --light-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --light-shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* Light theme */
body.light-theme {
  --color-text: var(--light-text-primary);
  --color-text-secondary: var(--light-text-secondary);
  --color-bg: var(--light-bg-primary);
  --color-bg-alt: var(--light-bg-secondary);
  --color-bg-deep: var(--light-bg-secondary);
  --color-bg-overlay: rgba(248, 250, 252, 0.95);
  --color-card-bg: var(--light-card-bg);
  --color-section-bg: var(--light-bg-secondary);
  --color-form-bg: var(--light-card-bg);
  --color-form-input-bg: var(--light-bg-primary);
  --color-footer-bg: var(--light-bg-primary);
  --color-shadow: var(--light-shadow);
  --color-shadow-hover: var(--light-shadow-lg);
}

body {
  font-family: "Inter", sans-serif;
  background: linear-gradient(
    135deg,
    var(--color-bg) 0%,
    var(--color-bg-alt) 50%,
    var(--color-bg-deep) 100%
  );
  color: var(--color-text);
  line-height: 1.6;
  transition: all 0.3s ease;
  min-height: 100vh;
}

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

/* Reveal Animation System */
.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.8s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Loader */
.loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-content {
  text-align: center;
}

.loader-logo .logo-text {
  font-size: 3rem;
  font-weight: 700;
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-secondary)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 2rem;
}

.loader-spinner {
  position: relative;
  width: 60px;
  height: 60px;
  margin: 0 auto 1rem;
}

.spinner-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  border: 3px solid transparent;
  border-top: 3px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.spinner-ring:nth-child(2) {
  width: 80%;
  height: 80%;
  top: 10%;
  left: 10%;
  border-top-color: var(--color-secondary);
  animation-duration: 1.5s;
}

.spinner-ring:nth-child(3) {
  width: 60%;
  height: 60%;
  top: 20%;
  left: 20%;
  border-top-color: var(--color-accent-green);
  animation-duration: 2s;
}

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

.loader-text {
  color: var(--color-text-secondary);
  font-weight: 500;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--color-bg-overlay);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-primary-border);
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}

.nav-logo img {
  width: 2.6rem;
  height: 2.6rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

.theme-toggle {
  background: var(--color-primary-light);
  border: 2px solid var(--color-primary-border);
  color: var(--color-text);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-rgba);
  transform: scale(1.1);
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--color-text);
  margin: 3px 0;
  transition: 0.3s;
  border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translateY(6px);
}

.hamburger.active span:nth-child(2) {
  transform: rotate(-45deg) translateY(-6px);
}

.hamburger.active span:nth-child(3) {
  opacity: 0;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 80px;
  background: linear-gradient(
    145deg,
    var(--color-bg) 0%,
    var(--color-bg-deep) 50%,
    var(--color-bg-alt) 100%
  );
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
      600px circle at 50% 50%,
      rgba(101, 166, 251, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      400px circle at 20% 80%,
      rgba(147, 51, 234, 0.1) 0%,
      transparent 50%
    );
  opacity: 0.1;
  z-index: 1;
}

.hero-content {
  max-width: 800px;
  position: relative;
  z-index: 2;
}

.hero-title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.gradient-text {
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-secondary) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-shift 2s ease-in-out infinite;
}

@keyframes gradient-shift {
  0%,
  100% {
    filter: hue-rotate(0deg);
  }
  50% {
    filter: hue-rotate(30deg);
  }
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 1rem;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: 3rem;
  line-height: 1.7;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 2rem;
  border-radius: 0.75rem;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--color-shadow-hover);
}

.btn-secondary {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--color-shadow);
}

.scroll-down {
  position: absolute;
  bottom: 1rem;
  text-align: center;
  opacity: 1;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.scroll-down.hidden {
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
}

.mouse {
  width: 25px;
  height: 50px;
  border: 2px solid var(--color-secondary);
  position: relative;
  border-radius: 1.5rem;
}

.mouse ::before {
  content: "";
  width: 4px;
  height: 10px;
  background: var(--color-primary);
  border-radius: 2px;
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll 1.5s infinite;
}

@keyframes scroll {
  0% {
    opacity: 1;
    top: 10px;
  }
  50% {
    opacity: 0.5;
    top: 20px;
  }
  100% {
    opacity: 0;
    top: 30px;
  }
}

/* Sections */
section {
  padding: 5rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--color-text), var(--color-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
}

/* About Section */
.about {
  background: var(--color-section-bg);
  backdrop-filter: blur(10px);
}

.about-content {
  align-items: center;
}

.about-text p {
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1.5rem;
}

.stat-item {
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--color-card-bg);
  border-radius: 1rem;
  /* box-shadow: 0 8px 32px var(--color-shadow); */
  border: 1px solid var(--color-primary-border);
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.stat-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px var(--color-shadow-hover);
  border-color: var(--color-primary);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-accent-green)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--color-text-secondary);
  font-weight: 500;
}

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

.skill-category {
  background: var(--color-card-bg);
  padding: 2rem;
  border-radius: 1rem;
  /* box-shadow: 0 8px 32px var(--color-shadow); */
  border: 1px solid var(--color-primary-border);
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.skill-category:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px var(--color-shadow-hover);
  border-color: var(--color-primary);
}

.category-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

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

.category-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

.skill-items {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  background: var(--color-bg-deep);
  border-radius: 0.75rem;
  border: 2px solid var(--color-primary-border);
  transition: all 0.3s ease;
}

.skill-item:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 8px 25px var(--color-shadow);
  background: var(--color-primary-light);
}

.skill-item i {
  font-size: 1rem;
  color: var(--color-primary);
  transition: all 0.3s ease;
}

.skill-item span {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
}

/* Experience Section */
.experience {
  background: var(--color-section-bg);
  backdrop-filter: blur(10px);
}

.timeline-item {
  max-width: 800px;
  margin: 0 auto;
  background: var(--color-card-bg);
  padding: 2.5rem;
  border-radius: 1rem;
  /* box-shadow: 0 8px 32px var(--color-shadow); */
  border: 1px solid var(--color-primary-border);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.timeline-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px var(--color-shadow-hover);
  border-color: var(--color-primary);
}

.timeline-header h3 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.company {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.duration {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  background: var(--color-primary-light);
  padding: 0.5rem 1rem;
  border-radius: 2rem;
  display: inline-block;
  margin-bottom: 1.5rem;
  border: 1px solid var(--color-primary-border);
}

.timeline-description ul {
  list-style: none;
}

.timeline-description li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 0.5rem 0;
}

.timeline-description li i {
  color: var(--color-primary);
  margin-top: 4px;
  flex-shrink: 0;
  width: 20px;
}

/* Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--color-card-bg);
  border-radius: 1rem;
  padding: 2rem;
  /* box-shadow: 0 8px 32px var(--color-shadow); */
  border: 1px solid var(--color-primary-border);
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px var(--color-shadow-hover);
  border-color: var(--color-primary);
}

.project-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

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

.project-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

.project-description {
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tech-tag {
  background: var(--color-primary-light);
  color: var(--color-primary);
  padding: 0.25rem 0.75rem;
  border-radius: 2rem;
  font-size: 0.75rem;
  border: 1px solid var(--color-primary-border);
  font-weight: 500;
}

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

.project-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-primary-border);
}

.project-link:hover {
  background: var(--color-primary-light);
  color: var(--color-secondary);
  transform: translateX(4px);
}

/* Contact Section */
.contact {
  background: var(--color-section-bg);
  backdrop-filter: blur(10px);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

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

.contact-item {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--color-card-bg);
  border-radius: 1rem;
  /* box-shadow: 0 8px 32px var(--color-shadow); */
  border: 1px solid var(--color-primary-border);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.contact-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px var(--color-shadow-hover);
  border-color: var(--color-primary);
}

.contact-item i {
  font-size: 1.25rem;
  color: var(--color-primary);
  width: 50px;
  text-align: center;
}

.contact-item h4 {
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--color-text);
}

.contact-item p {
  color: var(--color-text-secondary);
}

.social-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: var(--color-card-bg);
  color: var(--color-primary);
  border-radius: 0.4rem;
  text-decoration: none;
  cursor: pointer;
  font-size: 1.3rem;
  transition: all 0.3s ease;
  border: 1px solid var(--color-primary-border);
  padding: 0 2rem;
}

.social-link::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 120%; /* position above the icon */
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  padding: 5px 8px;
  border-radius: 5px;
  font-size: 12px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.social-link::before {
  content: "";
  position: absolute;
  bottom: 110%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 5px;
  border-style: solid;
  border-color: rgba(0, 0, 0, 0.8) transparent transparent transparent;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.social-link:hover {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-secondary)
  );
  color: white;
  transform: translateY(-2px) scale(1.1);
  box-shadow: 0 8px 25px var(--color-shadow);
}

.social-link:hover::after,
.social-link:hover::before {
  opacity: 1;
  transform: translateX(-50%) translateY(-3px);
}

.contact-form {
  background: var(--color-form-bg);
  padding: 3rem;
  border-radius: 1rem;
  /* box-shadow: 0 8px 32px var(--color-shadow); */
  border: 1px solid var(--color-primary-border);
  backdrop-filter: blur(10px);
}

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem 1.5rem;
  border: 2px solid var(--color-primary-border);
  border-radius: 0.75rem;
  background: var(--color-form-input-bg);
  color: var(--color-text);
  font-family: "Inter", sans-serif;
  font-size: 1rem;
  transition: all 0.3s ease;
}

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

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

/* Footer */
.footer {
  background: var(--color-footer-bg);
  border-top: 1px solid var(--color-primary-border);
  padding: 2rem 0;
  text-align: center;
  backdrop-filter: blur(10px);
}

.footer p {
  color: var(--color-text-secondary);
}

/* Mobile Responsive */
@media (max-width: 865px) {
  .hamburger {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 75px;
    left: -100%;
    flex-direction: column;
    background: var(--color-bg-overlay);
    width: 50%;
    text-align: center;
    transition: 0.3s;
    border-top: 1px solid var(--color-primary-border);
    padding: 2rem 0;
    backdrop-filter: blur(20px);
  }

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

  .nav-menu .nav-link {
    padding: 0.8rem 2rem;
    display: block;
    font-size: 1.125rem;
    margin: 0.5rem 0;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .scroll-down {
    bottom: 2rem;
  }

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

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

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 250px;
    justify-content: center;
  }

  .skill-items {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  }

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

@media (max-width: 480px) {
  .hero {
    min-height: 95vh;
  }

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

  .section-title {
    font-size: 1.75rem;
  }

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

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

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

  .project-link {
    padding: 0.2rem 0.5rem;
  }

  .ext-links {
    font-size: 1rem;
  }
}

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

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

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

.reveal.fade-up {
  animation: fadeInUp 0.8s ease-out;
}

.reveal.fade-left {
  animation: fadeInLeft 0.8s ease-out;
}

.reveal.fade-right {
  animation: fadeInRight 0.8s ease-out;
}