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

/*  COLOR SCHEME  */
:root {
  /* Light Mode - Professional Navy & Orange Theme */
  --primary: #1E3A8A;
  --primary-light: #2563EB;
  --primary-dark: #1E40AF;
  --accent: #EA580C;
  --accent-light: #F97316;
  --accent-dark: #C2410C;
  
  --bg-main: #bccfe2;
  --bg-card: #FFFFFF;
  --bg-alt: #F1F5F9;
  
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-light: #64748B;
  --text-white: #FFFFFF;
  
  --border: #E2E8F0;
  --shadow-sm: 0 2px 8px rgba(30, 58, 138, 0.08);
  --shadow-md: 0 4px 16px rgba(30, 58, 138, 0.12);
  --shadow-lg: 0 8px 32px rgba(30, 58, 138, 0.16);
  --shadow-xl: 0 12px 48px rgba(30, 58, 138, 0.2);
  
  --gradient-primary: linear-gradient(135deg, #003b8d 50%, #152269 100%);
  --gradient-accent: linear-gradient(135deg, #0080ff 0%, #277bb8 100%);
  --gradient-card: linear-gradient(135deg, #F8FAFC 0%, #FFFFFF 100%);
}

/*  DARK MODE COLORS  */
#darkmode-toggle:checked ~ * {
  --primary: #2c80ee;
  --primary-light: #2c80ee;
  --primary-dark: #113071;
  --accent: #F97316;
  --accent-light: #FB923C;
  --accent-dark: #EA580C;
  
  --bg-main: #0A0E1A;
  --bg-card: #111827;
  --bg-alt: #1F2937;
  
  --text-primary: #f9f1f1;
  --text-secondary: #CBD5E1;
  --text-light: #94A3B8;
  --text-white: #FFFFFF;
  
  --border: #1F2937;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
  --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.7);
  
  --gradient-primary: linear-gradient(135deg, #14317a 0%, #0f245e 50%, #1E3A8A 100%);
  --gradient-accent: linear-gradient(135deg, #EA580C 0%, #F97316 100%);
  --gradient-card: linear-gradient(135deg, #111827 0%, #1F2937 100%);
}

/*  BASE STYLES  */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Poppins', sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background-color 0.4s ease, color 0.4s ease;
}

/*  DARK MODE TOGGLE  */
.darkmode-toggle {
  display: none;
}

.toggle-label {
  position: fixed;
  top: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  background: var(--bg-card);
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  transition: all 0.3s ease;
  border: 2px solid var(--border);
}

.toggle-label:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

.sun-icon,
.moon-icon {
  font-size: 24px;
  position: absolute;
  transition: all 0.4s ease;
}

.sun-icon {
  color: #F59E0B;
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.moon-icon {
  color: #60A5FA;
  opacity: 0;
  transform: rotate(180deg) scale(0);
}

#darkmode-toggle:checked ~ .toggle-label .sun-icon {
  opacity: 0;
  transform: rotate(180deg) scale(0);
}

#darkmode-toggle:checked ~ .toggle-label .moon-icon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/*  DOWNLOAD CV BUTTON  */
.download-cv {
  position: fixed;
  top: 100px;
  right: 24px;
  padding: 16px 28px;
  background: var(--gradient-accent);
  color: var(--text-white);
  border-radius: 30px;
  text-decoration: none;
  font-weight: 700;
  font-size: 15px;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.3s ease;
  border: none;
  letter-spacing: 0.5px;
}

.download-cv:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.download-cv i {
  font-size: 18px;
}

/*  HERO SECTION  */
.hero {
  background: var(--gradient-primary);
  padding: 100px 30px 80px;
  position: relative;
  overflow: hidden;
}

.hero-bg-pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 1;
}

.hero-photo {
  position: relative;
  flex-shrink: 0;
}

.photo-ring {
  position: absolute;
  top: -10px;
  left: -10px;
  right: -10px;
  bottom: -10px;
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.3);
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero-photo img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  border: 6px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.hero-text {
  flex: 1;
}

.hero-text h1 {
  font-family: 'Playfair Display', serif;
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 12px;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.4rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}

.hero-contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 28px;
}

.hero-contact-row span {
  color: rgba(255, 255, 255, 0.9);
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  backdrop-filter: blur(10px);
}

.hero-contact-row i {
  font-size: 18px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.social-links {
  display: flex;
  gap: 16px;
}

.social-link {
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
  font-size: 20px;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.social-link:hover {
  background: var(--text-white);
  color: var(--primary);
  transform: translateY(-4px);
}

/*  MAIN CONTENT  */
.main-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 60px 30px 80px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

/*  SECTION STYLES  */
.section {
  background: var(--gradient-card);
  border-radius: 20px;
  padding: 40px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.section:hover::before {
  opacity: 1;
}

.section:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.section-icon {
  font-size: 28px;
  color: var(--primary);
  width: 64px;
  height: 64px;
  background: var(--gradient-card);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  border: 2px solid var(--border);
  flex-shrink: 0;
}

.section-title {
  font-family: 'Playfair Display', serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

/*  ABOUT SECTION  */
.about-text {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
  text-align: justify;
}

/*  TIMELINE (EDUCATION)  */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 40px;
  padding-left: 20px;
}

.timeline-item {
  display: flex;
  gap: 24px;
  position: relative;
}

.timeline-marker {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.timeline-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--gradient-accent);
  box-shadow: 0 0 0 4px rgba(234, 88, 12, 0.2);
  position: relative;
  z-index: 2;
  animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 0 0 4px rgba(234, 88, 12, 0.2);
  }
  50% {
    transform: scale(1.1);
    box-shadow: 0 0 0 8px rgba(234, 88, 12, 0.1), 0 0 0 12px rgba(234, 88, 12, 0.05);
  }
}

.timeline-line {
  width: 2px;
  flex: 1;
  background: linear-gradient(to bottom, var(--primary), transparent);
  margin-top: 8px;
}

.timeline-content {
  flex: 1;
  padding-bottom: 20px;
}

.timeline-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--gradient-accent);
  color: var(--text-white);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.timeline-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.4;
}

.institution {
  color: var(--text-secondary);
  font-size: 1rem;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 8px;
  line-height: 1.6;
}

.institution i {
  color: var(--primary);
  font-size: 20px;
  margin-top: 2px;
  flex-shrink: 0;
}

.education-badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary);
    color: white;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    margin-top: 8px;
}



/*  SKILLS SECTION  */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.skill-category h4 {
  font-size: 15px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--text-primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.skill-category h4 i {
  font-size: 22px;
  color: var(--primary);
  width: 32px;
  height: 32px;
  background: var(--bg-alt);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  background: var(--bg-alt);
  border: 2px solid var(--border);
  border-radius: 8px;
  transition: all 0.3s ease;
  cursor: default;
}

.tag:hover {
  background: var(--primary);
  color: var(--text-white);
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

/*  EXPERIENCE SECTION  */
.experience-card {
  padding: 0;
}

.exp-header {
  margin-bottom: 20px;
}

.exp-title-group h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.exp-title-group h3 i {
  color: var(--primary);
  font-size: 28px;
  width: 48px;
  height: 48px;
  background: var(--bg-alt);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.exp-company {
  color: var(--accent);
  font-size: 1rem;
  font-weight: 600;
}

.exp-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 20px;
}

.exp-list li {
  font-size: 1rem;
  color: var(--text-secondary);
  padding-left: 32px;
  position: relative;
  line-height: 1.7;
}

.exp-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.2);
}

/*  PROJECTS SECTION  */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--bg-alt);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.project-card:hover {
  border-color: var(--primary);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.project-card:hover::before {
  transform: scaleX(1);
}

.project-icon {
  width: 70px;
  height: 70px;
  background: var(--gradient-primary);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
}

.project-card:hover .project-icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow: var(--shadow-lg);
}

.project-icon i {
  font-size: 32px;
  color: var(--text-white);
}

.project-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.project-sub {
  font-size: 14px;
  font-style: italic;
  color: var(--text-light);
  margin-bottom: 16px;
}

.project-tech-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.project-tech {
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.08), rgba(37, 99, 235, 0.12));
  border-radius: 20px;
  letter-spacing: 0.5px;
  border: 1px solid rgba(30, 58, 138, 0.15);
  text-transform: uppercase;
}

.project-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.project-card ul li {
  font-size: 15px;
  color: var(--text-secondary);
  padding-left: 24px;
  position: relative;
  line-height: 1.6;
}

.project-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

/*  CONTACT FORM  */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.form-group label {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 2px;
}

.form-group label i {
  color: var(--primary);
  font-size: 18px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.form-group input,
.form-group textarea {
  padding: 14px 18px;
  font-family: 'Poppins', sans-serif;
  font-size: 15px;
  color: var(--text-primary);
  background: var(--bg-alt);
  border: 2px solid var(--border);
  border-radius: 10px;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(45, 106, 106, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.submit-btn {
  padding: 16px 36px;
  font-family: 'Poppins', sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-white);
  background: var(--gradient-accent);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-sm);
}

.submit-btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.submit-btn i {
  font-size: 16px;
}

/*  CONTACT INFO CARDS  */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.contact-card {
  background: var(--bg-alt);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
  transition: all 0.3s ease;
}

.contact-card:hover {
  border-color: var(--primary);
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.contact-icon {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
}

.contact-card:hover .contact-icon {
  transform: scale(1.15);
  box-shadow: var(--shadow-lg);
}

.contact-icon i {
  font-size: 32px;
  color: var(--text-white);
}

.contact-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.contact-card p,
.contact-card a {
  font-size: 15px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.contact-card a:hover {
  color: var(--primary);
}

/*  FOOTER  */
.footer {
  background: var(--gradient-primary);
  padding: 50px 30px;
  text-align: center;
}

.footer-content {
  max-width: 1100px;
  margin: 0 auto;
}

.footer-name {
  font-family: 'Playfair Display', serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 24px;
}

.footer-divider {
  width: 80px;
  height: 3px;
  background: var(--accent);
  margin: 0 auto 24px;
  border-radius: 2px;
}

.footer-copy {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* RESPONSIVE DESIGN  */
@media (max-width: 768px) {
  .toggle-label,
  .download-cv {
    right: 16px;
  }

  .download-cv {
    top: 90px;
    font-size: 14px;
    padding: 12px 20px;
  }

  .hero {
    padding: 80px 20px 60px;
  }

  .hero-inner {
    flex-direction: column;
    text-align: center;
    gap: 40px;
  }

  .hero-photo img {
    width: 160px;
    height: 160px;
  }

  .hero-text h1 {
    font-size: 2.5rem;
  }

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

  .hero-contact-row {
    justify-content: center;
    gap: 16px;
  }

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

  .main-content {
    padding: 40px 20px 60px;
    gap: 32px;
  }

  .section {
    padding: 28px 24px;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

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

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

  .submit-btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero-text h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .hero-contact-row {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .download-cv span {
    display: none;
  }

  .download-cv {
    width: 60px;
    height: 60px;
    padding: 0;
    justify-content: center;
    border-radius: 50%;
  }
}