/* ============================================
   COLOR PALETTE
   ============================================ */
:root {
  --primary-blue: #142d4c;
  --secondary-blue: #385170;
  --accent-teal: #9fd3c7;
  --light-teal: #b6e1e0;
  --off-white: #fcfafa;
  --dark-gray: #222831;
  --medium-gray: #393e46;
  --light-gray: #606470;
  
  /* Functional colors */
  --bg-primary: var(--primary-blue);
  --bg-secondary: var(--secondary-blue);
  --bg-dark: #0f1f33;
  --text-primary: var(--off-white);
  --text-secondary: var(--light-teal);
  --accent: var(--accent-teal);
  --accent-hover: var(--light-teal);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Poppins', sans-serif;
  
  /* Transitions */
  --transition: all 0.3s ease;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

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

a:hover {
  color: var(--accent-hover);
}

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

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-xl) 0;
  position: relative;
}

.section-dark {
  background-color: var(--bg-secondary);
}

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  position: relative;
  display: inline-block;
  width: 100%;
}

.section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  margin: var(--spacing-sm) auto 0;
  border-radius: 2px;
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(20, 45, 76, 0.95);
  backdrop-filter: blur(10px);
  padding: var(--spacing-sm) 0;
  z-index: 1000;
  transition: var(--transition);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

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

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--font-heading);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-link {
  color: var(--text-primary);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 4px;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--accent);
  background-color: rgba(159, 211, 199, 0.1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--accent);
  margin: 3px 0;
  transition: var(--transition);
  border-radius: 2px;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-dark) 100%);
  padding-top: 80px;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  animation: fadeInUp 1s ease;
}

.hero-title {
  font-size: 4rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  animation: fadeInUp 1s ease 0.2s backwards;
}

.hero-subtitle {
  font-size: 2rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  animation: fadeInUp 1s ease 0.4s backwards;
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 1s ease 0.6s backwards;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 1s ease 0.8s backwards;
  flex-wrap: wrap;
}

.btn {
  padding: 0.875rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  border: 2px solid transparent;
  cursor: pointer;
  display: inline-block;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--bg-primary);
  border-color: var(--accent);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(159, 211, 199, 0.3);
}

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

.btn-secondary:hover {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(252, 250, 250, 0.2);
}

.hero-social {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  animation: fadeInUp 1s ease 1s backwards;
}

.hero-social a {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: rgba(159, 211, 199, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.hero-social a i {
  font-size: 1.5rem;
  color: var(--accent);
}

.hero-social a:hover {
  background-color: var(--accent);
  transform: translateY(-5px);
}

.hero-social a:hover i {
  color: var(--bg-primary);
}

.hero-scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

.hero-scroll a {
  font-size: 2rem;
  color: var(--accent);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-content {
  max-width: 1100px;
  margin: 0 auto;
}

.about-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--spacing-lg);
  align-items: start;
}

.about-photo {
  position: relative;
}

.profile-photo {
  width: 100%;
  height: auto;
  border-radius: 15px;
  border: 4px solid var(--accent);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: var(--transition);
}

.profile-photo:hover {
  transform: scale(1.03);
  box-shadow: 0 15px 40px rgba(159, 211, 199, 0.4);
}

.about-text {
  background-color: rgba(56, 81, 112, 0.3);
  padding: var(--spacing-lg);
  border-radius: 10px;
  border-left: 4px solid var(--accent);
}

.about-story {
  font-size: 1.125rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
  white-space: pre-line;
}

.about-text p {
  font-size: 1.125rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

.about-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 2px solid rgba(159, 211, 199, 0.2);
}

.info-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1rem;
}

.info-item i {
  color: var(--accent);
  font-size: 1.25rem;
  min-width: 30px;
}

.info-item a {
  color: var(--text-secondary);
  word-break: break-word;
}

.info-item a:hover {
  color: var(--accent);
}

/* ============================================
   TIMELINE (EXPERIENCE)
   ============================================ */
.timeline {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--spacing-md) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--accent), var(--accent-hover));
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.timeline-item:nth-child(odd) .timeline-content {
  grid-column: 1;
}

.timeline-item:nth-child(even) .timeline-content {
  grid-column: 2;
}

.timeline-content {
  background-color: rgba(20, 45, 76, 0.5);
  padding: var(--spacing-md);
  border-radius: 10px;
  border: 2px solid rgba(159, 211, 199, 0.2);
  transition: var(--transition);
  position: relative;
}

.timeline-content:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(159, 211, 199, 0.2);
}

.timeline-marker {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 20px;
  background-color: var(--accent);
  border: 4px solid var(--bg-secondary);
  border-radius: 50%;
  z-index: 1;
  top: 30px;
}

.timeline-item.current .timeline-marker {
  animation: pulse 2s infinite;
}

.job-title {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: var(--spacing-xs);
}

.job-company {
  font-size: 1.125rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.job-period {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  font-style: italic;
}

.job-period .current-badge {
  display: inline-block;
  background-color: var(--accent);
  color: var(--bg-primary);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-left: var(--spacing-xs);
  font-style: normal;
}

.job-achievements {
  list-style: none;
  padding: 0;
}

.job-achievements li {
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: var(--spacing-xs);
  color: var(--text-secondary);
  line-height: 1.6;
}

.job-achievements li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 1.25rem;
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills-container {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  gap: var(--spacing-md);
}

.skill-category {
  background-color: rgba(56, 81, 112, 0.3);
  padding: var(--spacing-md);
  border-radius: 10px;
  border-left: 4px solid var(--accent);
  transition: var(--transition);
}

.skill-category:hover {
  transform: translateX(10px);
  border-left-width: 8px;
}

.skill-category h3 {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: var(--spacing-md);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.skill-tag {
  background-color: rgba(159, 211, 199, 0.1);
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.875rem;
  border: 1px solid rgba(159, 211, 199, 0.3);
  transition: var(--transition);
}

.skill-tag:hover {
  background-color: var(--accent);
  color: var(--bg-primary);
  transform: translateY(-2px);
  border-color: var(--accent);
}

/* ============================================
   EDUCATION SECTION
   ============================================ */
.education-container {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  gap: var(--spacing-lg);
}

.education-item {
  background-color: rgba(20, 45, 76, 0.5);
  padding: var(--spacing-lg);
  border-radius: 10px;
  border: 2px solid rgba(159, 211, 199, 0.2);
  transition: var(--transition);
}

.education-item:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(159, 211, 199, 0.2);
}

.education-degree {
  font-size: 1.75rem;
  color: var(--accent);
  margin-bottom: var(--spacing-xs);
}

.education-school {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.education-meta {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.education-meta span {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.education-meta i {
  color: var(--accent);
}

.education-details {
  list-style: none;
  padding: 0;
}

.education-details li {
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: var(--spacing-xs);
  color: var(--text-secondary);
  line-height: 1.6;
}

.education-details li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 1.25rem;
}

/* ============================================
   LANGUAGES SECTION
   ============================================ */
.languages-container {
  max-width: 700px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.language-item {
  background-color: rgba(56, 81, 112, 0.3);
  padding: var(--spacing-md);
  border-radius: 10px;
  text-align: center;
  border: 2px solid rgba(159, 211, 199, 0.2);
  transition: var(--transition);
}

.language-item:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
}

.language-name {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
}

.language-level {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.contact-text {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
}

.contact-methods {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.contact-card {
  background-color: rgba(20, 45, 76, 0.5);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 8px;
  border: 2px solid rgba(159, 211, 199, 0.2);
  transition: var(--transition);
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-primary);
}

.contact-card:hover {
  border-color: var(--accent);
  background-color: var(--accent);
  color: var(--bg-primary);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(159, 211, 199, 0.3);
}

.contact-card i {
  font-size: 1.25rem;
  min-width: 20px;
}

.contact-card span {
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background-color: var(--bg-dark);
  padding: var(--spacing-lg) 0;
  text-align: center;
  border-top: 2px solid rgba(159, 211, 199, 0.2);
}

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

.footer-content p {
  margin: var(--spacing-xs) 0;
}

.footer-subtext {
  font-size: 0.875rem;
  opacity: 0.7;
}

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

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: translateX(-50%) scale(1);
    box-shadow: 0 0 0 0 rgba(159, 211, 199, 0.7);
  }
  50% {
    transform: translateX(-50%) scale(1.1);
    box-shadow: 0 0 0 10px rgba(159, 211, 199, 0);
  }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
  /* Navigation */
  .nav-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: rgba(20, 45, 76, 0.98);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 27px rgba(0, 0, 0, 0.5);
    padding: var(--spacing-md);
    gap: 0;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-link {
    display: block;
    padding: var(--spacing-sm);
    margin: var(--spacing-xs) 0;
  }
  
  /* Hero */
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.5rem;
  }
  
  .hero-tagline {
    font-size: 1rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  /* Section titles */
  .section-title {
    font-size: 2rem;
  }
  
  /* Timeline */
  .timeline::before {
    left: 0;
  }
  
  .timeline-item {
    grid-template-columns: 1fr;
  }
  
  .timeline-item:nth-child(odd) .timeline-content,
  .timeline-item:nth-child(even) .timeline-content {
    grid-column: 1;
    margin-left: 30px;
  }
  
  .timeline-marker {
    left: 0;
    transform: translateX(0);
  }
  
  /* About section */
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .about-photo {
    max-width: 250px;
    margin: 0 auto;
  }
  
  /* Spacing */
  .section {
    padding: var(--spacing-lg) 0;
  }
  
  :root {
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1.25rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .about-text,
  .education-item {
    padding: var(--spacing-md);
  }
  
  .job-title,
  .education-degree {
    font-size: 1.25rem;
  }
  
  .contact-card {
    width: 100%;
    justify-content: center;
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center {
  text-align: center;
}

.text-accent {
  color: var(--accent);
}

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }