:root {
  --primary: #1a73e8;
  --primary-dark: #0d47a1;
  --secondary: #34a853;
  --accent: #fbbc05;
  --dark: #202124;
  --light: #f8f9fa;
  --gray: #5f6368;
  --light-gray: #dadce0;
  --card-bg: #ffffff;
  --section-bg: #f1f3f4;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --transition: all 0.3s ease;
}

.dark-mode {
  --primary: #8ab4f8;
  --primary-dark: #669df6;
  --secondary: #81c995;
  --accent: #fdd663;
  --dark: #e8eaed;
  --light: #202124;
  --gray: #9aa0a6;
  --light-gray: #3c4043;
  --card-bg: #292a2d;
  --section-bg: #202124;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Roboto", sans-serif;
  color: var(--dark);
  background-color: var(--light);
  line-height: 1.6;
  transition: var(--transition);
}

h1,
h2,
h3,
h4 {
  font-family: "Poppins", sans-serif;
  font-weight: 600;
  line-height: 1.3;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

section {
  padding: 80px 0;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 20px;
  position: relative;
  color: var(--primary);
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -10px;
  width: 70px;
  height: 4px;
  background-color: var(--accent);
  border-radius: 2px;
}

.section-title.center {
  text-align: center;
}

.section-title.center::after {
  left: 50%;
  transform: translateX(-50%);
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow);
  z-index: 1000;
  transition: var(--transition);
}

.dark-mode header {
  background-color: rgba(41, 42, 45, 0.95);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
}

.logo {
  display: flex;
  flex-direction: column;
}

.logo h1 {
  font-size: 1.8rem;
  color: var(--primary);
}

.logo p {
  font-size: 0.9rem;
  color: var(--gray);
}

nav ul {
  display: flex;
  list-style: none;
}

nav ul li {
  margin-left: 30px;
}

nav ul li a {
  text-decoration: none;
  color: var(--dark);
  font-weight: 500;
  font-size: 1rem;
  transition: var(--transition);
  position: relative;
}

.dark-mode nav ul li a {
  color: var(--dark);
}

nav ul li a:hover {
  color: var(--primary);
}

nav ul li a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  transition: var(--transition);
}

nav ul li a:hover::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--primary);
  cursor: pointer;
}

.theme-toggle {
  background: none;
  border: none;
  font-size: 1.2rem;
  color: var(--primary);
  cursor: pointer;
  margin-left: 20px;
}

/* Hero Section */
.hero {
  padding-top: 150px;
  background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
  position: relative;
  overflow: hidden;
}

.dark-mode .hero {
  background: linear-gradient(135deg, #202124 0%, #292a2d 100%);
}

.hero .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.hero-content {
  flex: 1;
  min-width: 300px;
  padding-right: 30px;
}

.hero-image {
  flex: 1;
  min-width: 300px;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 10px;
  color: var(--primary-dark);
}

.hero h2 {
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: var(--gray);
  font-weight: 400;
}

.hero p {
  font-size: 1.1rem;
  margin-bottom: 30px;
  color: var(--gray);
  max-width: 600px;
}

.hero-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 30px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--gray);
}

.contact-item i {
  color: var(--primary);
}

.hero-buttons {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--primary);
  color: white;
  text-decoration: none;
  border-radius: 5px;
  font-weight: 500;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn:hover {
  background-color: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 6px 15px rgba(26, 115, 232, 0.2);
}

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

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

.profile-img {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  object-fit: cover;
  border: 8px solid white;
  box-shadow: var(--shadow);
}

.social-links {
  display: flex;
  gap: 15px;
  margin-top: 30px;
}

.social-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  background-color: white;
  border-radius: 50%;
  color: var(--primary);
  font-size: 1.2rem;
  transition: var(--transition);
  text-decoration: none;
  box-shadow: var(--shadow);
}

.social-icon:hover {
  transform: translateY(-5px);
  background-color: var(--primary);
  color: white;
}

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

.about-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
  align-items: center;
}

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

.personal-details {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.details-title {
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: var(--primary);
}

.detail-item {
  display: flex;
  margin-bottom: 15px;
}

.detail-label {
  font-weight: 600;
  min-width: 150px;
  color: var(--dark);
}

.dark-mode .detail-label {
  color: var(--dark);
}

.detail-value {
  color: var(--gray);
}

/* Projects Section */
.projects {
  background-color: var(--light);
}

.projects-filter {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 8px 20px;
  background-color: transparent;
  border: 2px solid var(--light-gray);
  color: var(--gray);
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
}

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

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

.project-card {
  background-color: var(--card-bg);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

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

.project-content {
  padding: 25px;
}

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

.project-desc {
  color: var(--gray);
  margin-bottom: 20px;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tech-tag {
  background-color: rgba(26, 115, 232, 0.1);
  color: var(--primary);
  padding: 5px 12px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* Skills Section */
.skills {
  background-color: var(--section-bg);
}

.skills-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.skill-category {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.skill-category h3 {
  font-size: 1.5rem;
  margin-bottom: 25px;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.skill-item {
  margin-bottom: 25px;
}

.skill-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
}

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

.skill-percent {
  color: var(--primary);
  font-weight: 600;
}

.skill-bar {
  height: 10px;
  background-color: var(--light-gray);
  border-radius: 5px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background-color: var(--primary);
  border-radius: 5px;
  width: 0;
  transition: width 1.5s ease;
}

/* Education Section */
.education {
  background-color: var(--light);
}

.education-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.education-card {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  position: relative;
}

.education-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 5px;
  background-color: var(--primary);
  border-radius: 5px 0 0 5px;
}

.edu-icon {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 15px;
}

.edu-title {
  font-size: 1.3rem;
  margin-bottom: 10px;
  color: var(--primary);
}

.edu-institution {
  color: var(--gray);
  margin-bottom: 10px;
  font-weight: 500;
}

.edu-details {
  color: var(--gray);
}

.certifications {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 40px;
  justify-content: center;
}

.cert-card {
  background-color: var(--card-bg);
  padding: 20px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  width: 200px;
}

.cert-logo {
  width: 80px;
  height: 80px;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(26, 115, 232, 0.1);
  border-radius: 10px;
}

.cert-logo i {
  font-size: 2.5rem;
  color: var(--primary);
}

.cert-name {
  font-weight: 600;
  margin-bottom: 5px;
  color: var(--dark);
}

.dark-mode .cert-name {
  color: var(--dark);
}

.cert-date {
  color: var(--gray);
  font-size: 0.9rem;
}

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

.contact-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.contact-info {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.contact-info h3 {
  font-size: 1.5rem;
  margin-bottom: 25px;
  color: var(--primary);
}

.contact-item-large {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  margin-bottom: 25px;
}

.contact-item-large i {
  font-size: 1.3rem;
  color: var(--primary);
  margin-top: 5px;
}

.contact-details h4 {
  margin-bottom: 5px;
  color: var(--dark);
}

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

.contact-details p {
  color: var(--gray);
}

.contact-form {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--dark);
}

.dark-mode .form-group label {
  color: var(--dark);
}

.form-control {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--light-gray);
  border-radius: 5px;
  font-family: "Roboto", sans-serif;
  font-size: 1rem;
  background-color: var(--card-bg);
  color: var(--dark);
  transition: var(--transition);
}

.dark-mode .form-control {
  color: var(--dark);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
}

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

/* Footer */
footer {
  background-color: var(--dark);
  color: white;
  padding: 40px 0 20px;
}

.dark-mode footer {
  background-color: #121212;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 30px;
  margin-bottom: 30px;
}

.footer-logo h3 {
  font-size: 1.8rem;
  color: white;
  margin-bottom: 10px;
}

.footer-logo p {
  color: #ccc;
  max-width: 300px;
}

.footer-links h4 {
  font-size: 1.2rem;
  margin-bottom: 15px;
  color: white;
}

.footer-links ul {
  list-style: none;
}

.footer-links ul li {
  margin-bottom: 8px;
}

.footer-links ul li a {
  color: #ccc;
  text-decoration: none;
  transition: var(--transition);
}

.footer-links ul li a:hover {
  color: var(--primary);
  padding-left: 5px;
}

.footer-social {
  display: flex;
  gap: 15px;
}

.footer-social a {
  color: white;
  font-size: 1.2rem;
  transition: var(--transition);
}

.footer-social a:hover {
  color: var(--primary);
  transform: translateY(-5px);
}

.copyright {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #ccc;
  font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 992px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  .hero h2 {
    font-size: 1.5rem;
  }

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

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: block;
  }

  nav {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    background-color: var(--card-bg);
    padding: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    z-index: 999;
  }

  nav.active {
    left: 0;
  }

  nav ul {
    flex-direction: column;
  }

  nav ul li {
    margin: 0 0 15px 0;
  }

  .header-container {
    padding: 15px;
  }

  .hero {
    padding-top: 120px;
  }

  .hero-content,
  .hero-image {
    flex: 100%;
    padding-right: 0;
    text-align: center;
  }

  .hero-image {
    margin-top: 40px;
  }

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

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

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

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

@media (max-width: 576px) {
  section {
    padding: 60px 0;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero h2 {
    font-size: 1.2rem;
  }

  .profile-img {
    width: 250px;
    height: 250px;
  }

  .btn {
    padding: 10px 20px;
  }
}