:root {
  --white: #ffffff;
  --light-blue: #e3f2fd;
  --blue-100: #bbdefb;
  --blue-200: #90caf9;
  --blue-300: #64b5f6;
  --blue-400: #42a5f5;
  --blue-500: #2196f3;
  --black: #212121;
  --grey-100: #f5f5f5;
  --grey-200: #eeeeee;
  --grey-300: #e0e0e0;
  --grey-400: #bdbdbd;
  --grey-500: #9e9e9e;
  --error-red: #ff3333;
  --success-green: #4caf50;
  --warning-orange: #ff9800;
  --accent-teal: #009688;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4rem;
  --space-8: 6rem;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);

  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-full: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  --container-width: 1200px;
  --container-padding: 0 var(--space-3);

  --z-header: 1000;
  --z-dropdown: 900;
  --z-modal: 800;
  --z-tooltip: 700;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: "Poppins", sans-serif;
  background-color: var(--light-blue);
  color: var(--black);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-normal);
}

button {
  background: none;
  border: none;
  font-family: inherit;
  cursor: pointer;
}

ul,
ol {
  list-style: none;
}

input,
textarea,
button {
  font: inherit;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-3);
}

h1 {
  font-size: 3rem;
}
h2 {
  font-size: 2.25rem;
}
h3 {
  font-size: 1.5rem;
}
h4 {
  font-size: 1.25rem;
}
h5 {
  font-size: 1rem;
}
h6 {
  font-size: 0.875rem;
}

p {
  margin-bottom: var(--space-3);
}

.pre-title {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--blue-400);
  font-weight: 500;
  margin-bottom: var(--space-2);
}

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

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--white);
  box-shadow: var(--shadow-sm);
  z-index: var(--z-header);
  transition: background-color var(--transition-normal),
    box-shadow var(--transition-normal);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo a {
  display: flex;
  align-items: center;
  font-weight: 700;
  font-size: 1.5rem;
}

.logo-text {
  color: var(--black);
}
.logo-highlight {
  color: var(--blue-500);
}

.nav-links {
  display: flex;
  gap: var(--space-4);
}

.nav-links a {
  color: var(--black);
  font-weight: 500;
  padding: var(--space-2);
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background-color: var(--blue-500);
  transition: width var(--transition-normal), left var(--transition-normal);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
  left: 0;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}

.mobile-menu-btn span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--black);
  transition: transform var(--transition-normal);
}

.mobile-menu-open .mobile-menu-btn span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.mobile-menu-open .mobile-menu-btn span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-open .mobile-menu-btn span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.hero-section {
  padding-top: 120px;
  padding-bottom: var(--space-7);
  background: linear-gradient(
    135deg,
    var(--light-blue) 0%,
    var(--blue-100) 100%
  );
  position: relative;
  overflow: hidden;
}

.hero-section::after {
  content: "";
  position: absolute;
  bottom: -10%;
  left: 0;
  width: 100%;
  height: 20%;
  background-color: var(--white);
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
  z-index: 1;
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  position: relative;
  z-index: 2;
}

.hero-text {
  flex: 1;
  max-width: 600px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--blue-500);
  margin-bottom: var(--space-3);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--grey-500);
  margin-bottom: var(--space-4);
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-weight: 500;
  transition: all var(--transition-normal);
  text-align: center;
}

.btn-primary {
  background-color: var(--blue-500);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background-color: var(--blue-400);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background-color: transparent;
  color: var(--blue-500);
  border: 2px solid var(--blue-500);
}

.btn-outline:hover {
  background-color: var(--blue-500);
  color: var(--white);
  transform: translateY(-2px);
}

.about-section {
  background-color: var(--white);
  position: relative;
  z-index: 2;
  padding: var(--space-7) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.section-header h2 {
  color: var(--blue-500);
  margin-bottom: var(--space-2);
}

.section-divider {
  width: 60px;
  height: 3px;
  background-color: var(--blue-300);
  margin: 0 auto;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-6);
  align-items: center;
}

.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transform: perspective(1000px) rotateY(-5deg);
  transition: transform var(--transition-normal);
}

.about-image:hover {
  transform: perspective(1000px) rotateY(0);
}

.about-image img {
  width: 100%;
  height: auto;
  transition: transform var(--transition-slow);
}

.about-image:hover img {
  transform: scale(1.05);
}

.about-text p {
  color: var(--grey-500);
  font-size: 1.05rem;
  margin-bottom: var(--space-4);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.stat-card {
  background-color: var(--white);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--blue-500);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  transition: transform var(--transition-normal),
    box-shadow var(--transition-normal);
}

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

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--blue-100);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background-position: center;
  background-repeat: no-repeat;
  background-size: 24px;
}

.experience-section {
  background-color: var(--light-blue);
  position: relative;
  padding: var(--space-7) 0;
}

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

.timeline::before {
  content: "";
  position: absolute;
  width: 3px;
  background-color: var(--blue-300);
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.timeline-item {
  padding: var(--space-3) 0;
  position: relative;
  width: 50%;
  z-index: 2;
}

.timeline-item:nth-child(odd) {
  left: 0;
}
.timeline-item:nth-child(even) {
  left: 50%;
}

.timeline-dot {
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--blue-500);
  top: 30px;
  z-index: 3;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal),
    background-color var(--transition-normal);
}

.timeline-item:nth-child(odd) .timeline-dot {
  right: -8px;
}
.timeline-item:nth-child(even) .timeline-dot {
  left: -8px;
}

.timeline-item:hover .timeline-dot {
  transform: scale(1.2);
  background-color: var(--blue-400);
}

.timeline-content {
  padding: var(--space-4);
  background-color: var(--white);
  border-radius: var(--radius-md);
  position: relative;
  max-width: 90%;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal),
    box-shadow var(--transition-normal);
}

.timeline-item:nth-child(odd) .timeline-content {
  margin-right: var(--space-4);
  margin-left: auto;
}

.timeline-item:nth-child(even) .timeline-content {
  margin-left: var(--space-4);
}

.contact-section {
  background-color: var(--light-blue);
  position: relative;
  padding: var(--space-7) 0;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
}

.contact-card {
  background-color: var(--white);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: transform var(--transition-normal),
    box-shadow var(--transition-normal);
}

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

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--blue-100);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
  background-position: center;
  background-repeat: no-repeat;
  background-size: 24px;
  transition: background-color var(--transition-normal);
}

.contact-card:hover .contact-icon {
  background-color: var(--blue-200);
}

.footer {
  background-color: var(--white);
  padding-top: var(--space-6);
  padding-bottom: var(--space-3);
  box-shadow: 0 -1px 3px rgba(0, 0, 0, 0.05);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-5);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-logo {
  font-weight: 700;
  font-size: 1.5rem;
  margin-bottom: var(--space-2);
}

.footer-brand p {
  color: var(--grey-500);
  margin-bottom: 0;
}

.footer-links h3,
.footer-social h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-3);
  color: var(--black);
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-links ul li a {
  color: var(--grey-500);
  transition: color var(--transition-normal), transform var(--transition-normal);
  display: inline-block;
}

.footer-links ul li a:hover {
  color: var(--blue-500);
  transform: translateX(5px);
}

.social-icons {
  display: flex;
  gap: var(--space-3);
}

.social-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--grey-200);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-normal),
    transform var(--transition-normal);
  background-position: center;
  background-repeat: no-repeat;
  background-size: 20px;
}

.social-icon:hover {
  background-color: var(--blue-100);
  transform: translateY(-5px);
}

.footer-bottom {
  text-align: center;
  margin-top: var(--space-5);
  padding-top: var(--space-3);
  border-top: 1px solid var(--grey-200);
}

.footer-bottom p {
  color: var(--grey-500);
  font-size: 0.875rem;
  margin-bottom: 0;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

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

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

.fade-in {
  animation: fadeIn 1s ease forwards;
}
.slide-up {
  animation: slideUp 0.8s ease forwards;
}
.slide-in {
  animation: slideIn 0.8s ease forwards;
}
.float {
  animation: float 3s ease-in-out infinite;
}

@media (max-width: 1200px) {
  .container {
    max-width: 992px;
  }
  .hero-title {
    font-size: 3rem;
  }
}

@media (max-width: 992px) {
  .container {
    max-width: 768px;
  }

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

  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .about-image {
    max-width: 500px;
    margin: 0 auto;
  }
}

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

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background-color: var(--white);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-5);
    transition: right var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }

  .mobile-menu-open .nav-links {
    right: 0;
  }

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

  .timeline::before {
    left: 40px;
  }

  .timeline-item {
    width: 100%;
    padding-left: 70px;
  }

  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    left: 0;
  }

  .timeline-item:nth-child(odd) .timeline-dot,
  .timeline-item:nth-child(even) .timeline-dot {
    left: 32px;
  }

  .timeline-item:nth-child(odd) .timeline-content,
  .timeline-item:nth-child(even) .timeline-content {
    margin-left: 0;
    margin-right: 0;
    max-width: 100%;
  }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-links ul {
    align-items: center;
  }
  .social-icons {
    justify-content: center;
  }
}

@media (max-width: 576px) {
  .stats-grid,
  .contact-info {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
    gap: var(--space-3);
  }

  .btn {
    width: 100%;
  }
}

.contact-form-container {
  background-color: var(--white);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  box-shadow: var(--shadow-lg);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--grey-500);
}

.form-group input,
.form-group textarea {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--grey-300);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-normal),
    box-shadow var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--blue-300);
  box-shadow: 0 0 0 2px rgba(33, 150, 243, 0.2);
}

.form-group input.error,
.form-group textarea.error {
  border-color: var(--error-red);
}

.error-message {
  color: var(--error-red);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.success-message {
  text-align: center;
  padding: var(--space-4);
  background-color: var(--success-green);
  color: var(--white);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.form-submit {
  background-color: var(--blue-500);
  color: var(--white);
  padding: var(--space-3) var(--space-4);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition-normal),
    transform var(--transition-normal);
}

.form-submit:hover {
  background-color: var(--blue-400);
  transform: translateY(-2px);
}

.form-submit:disabled {
  background-color: var(--grey-300);
  cursor: not-allowed;
}

.form-submit.loading {
  position: relative;
  color: transparent;
}

.form-submit.loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--white);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 768px) {
  .contact-form-container {
    padding: var(--space-4);
  }

  .form-group input,
  .form-group textarea {
    font-size: 16px; 
  }
}

@media (max-width: 480px) {
  .contact-form-container {
    padding: var(--space-3);
  }

  .form-submit {
    width: 100%;
  }
}