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

:root {
  --bg-primary: #0F172A;
  --bg-card: #1E293B;
  --color-primary: #3B82F6;
  --color-primary-hover: #2563EB;
  --text-primary: #FFFFFF;
  --text-secondary: #94A3B8;
  --font-family: 'Inter', sans-serif;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px; /* offset for fixed navbar */
}

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

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

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

/* ========================================
   CONTAINER
   ======================================== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: background var(--transition);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-menu {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

/* Hamburger button (hidden on desktop) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

/* ========================================
   SECTION TITLE
   ======================================== */
.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 48px;
  text-align: center;
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
  width: 100%;
}

.hero-content {
  flex: 1;
}

.hero-greeting {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.hero-name {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--text-primary), var(--color-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 500px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.availability {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.availability span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #34D399;
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.12);
}

.hero-photo-wrapper {
  flex-shrink: 0;
}

.hero-photo {
  width: 250px;
  height: 250px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid rgba(59, 130, 246, 0.4);
  box-shadow: 0 0 40px rgba(59, 130, 246, 0.15);
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about {
  padding: 100px 0;
}

.about-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.about-content p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 16px;
}

.about-content p:last-child {
  margin-bottom: 0;
}

/* ========================================
   EXPERIENCE, EDUCATION & ACHIEVEMENTS
   ======================================== */
.experience,
.education,
.achievements {
  padding: 100px 0;
}

.education,
.achievements {
  background: rgba(30, 41, 59, 0.22);
}

.section-kicker {
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-align: center;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-kicker + .section-title {
  margin-bottom: 44px;
}

.timeline {
  max-width: 850px;
  margin: 0 auto;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 12px;
  width: 1px;
  background: rgba(59, 130, 246, 0.35);
}

.timeline-item {
  position: relative;
  padding-left: 46px;
}

.timeline-item + .timeline-item {
  margin-top: 28px;
}

.timeline-marker {
  position: absolute;
  left: 5px;
  top: 28px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.35);
}

.timeline-content,
.education-card,
.achievement-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 16px;
}

.timeline-content {
  padding: 26px 28px;
}

.timeline-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.timeline-heading h3,
.achievement-card h3 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.timeline-heading p,
.achievement-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

time {
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
}

.timeline-content ul {
  margin: 20px 0 0 18px;
  list-style: disc;
  color: var(--text-secondary);
}

.timeline-content li + li {
  margin-top: 7px;
}

.education-card {
  display: flex;
  gap: 24px;
  max-width: 850px;
  margin: 0 auto;
  padding: 30px;
}

.education-card + .education-card {
  margin-top: 20px;
}

.education-icon {
  display: grid;
  place-items: center;
  flex: 0 0 46px;
  height: 46px;
  border-radius: 12px;
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-primary);
  font-size: 1.75rem;
  font-weight: 700;
}

.education-main { flex: 1; }

.education-description {
  margin-top: 20px;
  color: var(--text-secondary);
  font-size: 0.94rem;
}

.education-highlights {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 26px;
}

.education-highlights p {
  padding: 14px;
  border-left: 2px solid rgba(59, 130, 246, 0.5);
  background: rgba(15, 23, 42, 0.45);
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.education-highlights strong { color: var(--text-primary); }

.education-link {
  display: inline-block;
  margin-top: 20px;
  color: var(--color-primary);
  font-size: 0.88rem;
  font-weight: 600;
}

.education-link:hover { color: #93C5FD; }

.education-link span { margin-left: 3px; }

.achievement-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.achievement-card {
  min-height: 210px;
  padding: 24px;
  transition: transform var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
}

.achievement-card:hover {
  transform: translateY(-4px);
  border-color: rgba(59, 130, 246, 0.55);
}

.achievement-icon {
  display: block;
  margin-bottom: 20px;
  color: var(--color-primary);
  font-size: 1.5rem;
}

.achievement-card time {
  display: block;
  margin-top: 16px;
}

.achievement-link {
  margin-top: auto;
  padding-top: 16px;
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 600;
}

.achievement-link:hover {
  color: #93C5FD;
}

.achievement-link span {
  margin-left: 3px;
}

/* ========================================
   SKILLS SECTION
   ======================================== */
.skills {
  padding: 100px 0;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
  max-width: 800px;
  margin: 0 auto;
}

.skill-card {
  background: var(--bg-card);
  padding: 24px 16px;
  border-radius: 12px;
  text-align: center;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all var(--transition);
}

.skill-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

/* ========================================
   PROJECTS SECTION
   ======================================== */
.projects {
  padding: 100px 0;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-4px);
}

.project-image {
  width: 100%;
  height: 200px;
  background: rgba(59, 130, 246, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-image-rag,
.project-image-bacteria,
.project-image-people,
.project-image-fire,
.project-image-nutrition {
  position: relative;
  overflow: hidden;
}

.project-image-rag { background: linear-gradient(135deg, #1D4ED8, #0F172A); }
.project-image-bacteria { background: linear-gradient(135deg, #047857, #1E293B); }
.project-image-people { background: linear-gradient(135deg, #0E7490, #1E293B); }
.project-image-fire { background: linear-gradient(135deg, #C2410C, #1E293B); }
.project-image-nutrition { background: linear-gradient(135deg, #4F46E5, #1E293B); }

.project-image-rag::before,
.project-image-bacteria::before,
.project-image-people::before,
.project-image-fire::before,
.project-image-nutrition::before {
  content: '';
  position: absolute;
  width: 180px;
  height: 180px;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 50%;
  transform: translate(50px, -50px);
}

.project-image span {
  position: relative;
  color: rgba(255,255,255,0.9);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.project-placeholder {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.project-info {
  padding: 24px;
  display: flex;
  flex: 1;
  flex-direction: column;
}

.project-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.project-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 16px;
  line-height: 1.5;
}

.project-label {
  margin-bottom: 8px;
  color: var(--color-primary);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.project-result {
  margin-top: auto;
  padding-top: 15px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: #BFDBFE;
  font-size: 0.86rem;
  font-weight: 500;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.project-tech span {
  background: rgba(59, 130, 246, 0.1);
  color: var(--color-primary);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

.project-links {
  display: flex;
  gap: 12px;
  margin-top: 0;
  padding-top: 20px;
}

.project-links .btn {
  padding: 8px 20px;
  font-size: 0.85rem;
}

.demo-link span {
  margin-left: 4px;
  font-size: 1rem;
}

.coming-soon {
    max-width: 700px;
    margin: 40px auto;
    padding: 70px 50px;

    text-align: center;

    background: rgba(255,255,255,0.04);
    backdrop-filter: blur(10px);

    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 20px;

    box-shadow: 0 15px 40px rgba(0,0,0,.25);

    transition: .3s;
}

.coming-soon:hover{
    transform: translateY(-6px);
    border-color:#60a5fa;
}

.coming-icon{
    font-size:3.5rem;
    margin-bottom:20px;
}

.coming-soon h3{
    color:#ffffff;
    font-size:2.2rem;
    margin-bottom:20px;
}

.coming-soon p{
    color:#94a3b8;
    font-size:1.05rem;
    line-height:1.8;
    max-width:520px;
    margin:auto;
}

.coming-badge{
    display:inline-block;
    margin-top:30px;

    padding:10px 20px;

    border-radius:50px;

    background:#2563eb;
    color:white;

    font-size:.9rem;
    font-weight:600;

    letter-spacing:.5px;
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact {
  padding: 100px 0;
}

.contact-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-text {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 16px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
  padding: 10px 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
}

.contact-link:hover {
  color: var(--text-primary);
  border-color: var(--color-primary);
}

.contact-icon {
  width: 20px;
  height: 20px;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  padding: 32px 0;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* ========================================
   FADE-IN ANIMATION
   ======================================== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   RESPONSIVE: TABLET (max-width: 768px)
   ======================================== */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.98);
    flex-direction: column;
    align-items: center;
    padding: 24px 0;
    gap: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

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

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

  .hero-actions,
  .availability {
    justify-content: center;
  }

  .hero-name {
    font-size: 2.8rem;
  }

  .hero-title {
    font-size: 1.3rem;
  }

  .hero-photo {
    width: 200px;
    height: 200px;
  }

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

  .achievement-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ========================================
   RESPONSIVE: MOBILE (max-width: 480px)
   ======================================== */
@media (max-width: 480px) {
  .hero-name {
    font-size: 2.2rem;
  }

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

  .hero-description {
    font-size: 1rem;
  }

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

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

  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-links {
    flex-direction: column;
  }

  .timeline-heading {
    flex-direction: column;
    gap: 6px;
  }

  .timeline-content,
  .education-card {
    padding: 22px;
  }

  .education-card {
    flex-direction: column;
    gap: 16px;
  }

  .education-highlights,
  .achievement-grid {
    grid-template-columns: 1fr;
  }
}