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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #f0f0f3 100%);
  color: #2c3e50;
  min-height: 100vh;
  line-height: 1.6;
}

/* Typography */
h1 {
  font-weight: 700;
  font-size: 48px;
  line-height: 1.2;
  margin: 0;
}

h2 {
  font-weight: 600;
  font-size: 32px;
  line-height: 1.3;
  color: #2c3e50;
}

h3 {
  font-weight: 600;
  font-size: 24px;
  line-height: 1.4;
  letter-spacing: -0.02em;
  color: #2c3e50;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  color: #1a202c;
  text-align: center;
  margin-bottom: 32px;
  position: relative;
  padding-bottom: 12px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #C62828, #E57373);
  border-radius: 2px;
}

/* Navbar */
.navbar {
  background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
  width: 100%;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 60px;
  min-height: 60px;
}

.navbar-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0 32px;
  height: 100%;
}

.navbar-items {
  display: flex;
  gap: 16px;
}

.navbar-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  color: #FFFFFF;
  text-decoration: none;
  transition: all 0.3s ease;
  border-radius: 8px;
}

.navbar-link:hover {
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.navbar-icon {
  width: 28px;
  height: 28px;
}

/* Main Body */
.app-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

/* Hero Section */
.hero {
  width: 100%;
  padding: 80px 0;
  text-align: center;
  background: white;
  border-radius: 20px;
  margin: 40px 0;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

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

.greeting {
  font-size: 20px;
  color: #5a6c7d;
  margin-bottom: 8px;
  font-weight: 500;
}

.hero-name {
  font-size: 56px;
  font-weight: 800;
  background: linear-gradient(135deg, #C62828 0%, #E57373 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.hero-title {
  font-size: 32px;
  color: #2c3e50;
  margin-bottom: 16px;
  font-weight: 600;
}

.hero-description {
  font-size: 20px;
  color: #5a6c7d;
  line-height: 1.6;
}

/* Skills Section */
.skills {
  width: 100%;
  padding: 48px 32px;
  background: white;
  border-radius: 20px;
  margin: 40px 0;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}

.skill-category h3 {
  color: #2c3e50;
  font-size: 16px;
  margin-bottom: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  color: #2c3e50;
  padding: 6px 12px;
  border-radius: 16px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid #dee2e6;
  transition: all 0.3s ease;
  cursor: default;
}

.skill-tag:hover {
  background: linear-gradient(135deg, #C62828 0%, #E57373 100%);
  color: white;
  border-color: #C62828;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(198, 40, 40, 0.25);
}

/* Experience Section */
.experience {
  width: 100%;
  padding: 60px 0;
  background: white;
  border-radius: 20px;
  margin: 40px 0;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.experience-list {
  list-style: none;
  padding: 0 32px;
  margin: 0;
}

.experience-item {
  width: 100%;
  margin-bottom: 8px;
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.experience-item:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.experience-button {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 24px;
  background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
  border: 2px solid #e9ecef;
  border-radius: 12px;
  cursor: pointer;
  text-align: left;
  transition: all 0.3s ease;
}

.experience-button:hover {
  background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
  border-color: #C62828;
  transform: translateY(-2px);
}

.experience-left {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 12px;
}

.company-name {
  font-weight: 700;
  font-size: 22px;
  color: #1a202c;
  margin: 0;
}

.company-name.active {
  color: #C62828;
}

.company-role {
  background: linear-gradient(135deg, #C62828 0%, #E57373 100%);
  color: white;
  border: none;
  border-radius: 20px;
  padding: 6px 16px;
}

.company-role p {
  font-weight: 600;
  font-size: 14px;
  line-height: 1.4;
  margin: 0;
}

.experience-right p {
  font-weight: 600;
  font-size: 16px;
  color: #5a6c7d;
  margin: 0;
}

.experience-details {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out;
  background: #f8f9fa;
  border-radius: 0 0 12px 12px;
}

.experience-details.open {
  max-height: 1000px;
  transition: max-height 0.6s ease-in;
  margin-top: -12px;
}

.experience-content {
  padding: 24px 32px;
}

.experience-content p {
  font-size: 16px;
  line-height: 1.7;
  color: #4a5568;
  margin: 0 0 12px 0;
}

.divider {
  display: none;
}

/* Contact Section */
.contact {
  width: 100%;
  padding: 48px 32px;
  text-align: center;
  background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
  margin-top: 60px;
}

.contact-title {
  font-size: 28px;
  font-weight: 700;
  color: white;
  margin-bottom: 12px;
}

.contact-subtitle {
  font-size: 16px;
  color: #ecf0f1;
  margin-bottom: 24px;
}

.contact-button-container {
  display: flex;
  justify-content: center;
}

.contact-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: 50px;
  border: 2px solid white;
  background-color: white;
  color: #2c3e50;
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.contact-button:hover {
  background-color: #C62828;
  border-color: #C62828;
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(198, 40, 40, 0.4);
}

.email-icon {
  width: 18px;
  height: 18px;
}

/* Responsive Design */
@media (min-width: 1024px) {
  .contact {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    margin-top: 0;
  }
  
  body {
    padding-bottom: 200px;
  }
}

@media (min-width: 600px) {
  .experience-button {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .experience-left {
    margin-bottom: 0;
  }
}

@media (max-width: 768px) {
  .hero-name {
    font-size: 40px;
  }

  .hero-title {
    font-size: 24px;
  }

  .hero-description {
    font-size: 16px;
  }

  .section-title {
    font-size: 28px;
  }

  .skills-grid {
    grid-template-columns: 1fr;
    padding: 0 24px;
  }

  .experience-list {
    padding: 0 16px;
  }

  .experience-button {
    padding: 20px;
  }

  .experience-content {
    padding: 20px 24px;
  }

  .app-body {
    padding: 0 16px;
  }

  .navbar-container {
    padding: 0 16px;
  }

  .contact-title {
    font-size: 28px;
  }

  .contact-subtitle {
    font-size: 16px;
  }
}