/* ── Design Tokens ──────────────────────────────────────── */
:root {
  --bg:           #f7f5f0;
  --bg-alt:       #efecea;
  --surface:      #ffffff;
  --surface-dim:  #f0ede8;
  --border:       #e3dfd9;
  --text:         #1a1a1a;
  --text-muted:   #6b6560;
  --text-light:   #9b948d;
  --accent:       #d4732a;
  --accent-light: #f4e5d4;
  --accent-dark:  #b85e1f;
  --isro:         #2a7dd4;
  --shadow-sm:    0 1px 4px rgba(0,0,0,.06);
  --shadow-md:    0 4px 20px rgba(0,0,0,.09);
  --shadow-lg:    0 12px 48px rgba(0,0,0,.12);
  --radius:       14px;
  --radius-sm:    8px;
  --transition:   .25s cubic-bezier(.4,0,.2,1);
}

/* ── Reset & Base ────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

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

/* ── Animation helpers ───────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes scrollPulse {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(8px); opacity: .4; }
}
@keyframes float {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.animate-fade-up { animation: fadeUp .7s ease both; }
.delay-1 { animation-delay: .1s; }
.delay-2 { animation-delay: .2s; }
.delay-3 { animation-delay: .3s; }
.delay-4 { animation-delay: .4s; }
.delay-5 { animation-delay: .5s; }

/* ── Navbar ──────────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(247,245,240,.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}
#navbar.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: 'Outfit', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -1px;
}
.nav-logo .dot { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-links a {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover { color: var(--text); background: var(--surface-dim); }
.nav-links .nav-cta {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}
.nav-links .nav-cta:hover { background: var(--accent-dark); color: #fff; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  border-radius: 8px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 64px; left: 0; right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  z-index: 99;
  padding: 16px 24px 24px;
  transform: translateY(-10px);
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
}
.mobile-menu.open {
  display: block;
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}
.mobile-menu ul { display: flex; flex-direction: column; gap: 4px; }
.mobile-menu a {
  display: block;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}
.mobile-menu a:hover { background: var(--surface-dim); color: var(--text); }

/* ── Hero ─────────────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  padding: 120px 24px 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: .5;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  text-align: center;
  max-width: 860px;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: var(--accent-light);
  border: 1px solid #e8c9a5;
  color: var(--accent-dark);
  border-radius: 20px;
  font-size: .85rem;
  font-weight: 600;
  margin-bottom: 28px;
}

.hero-photo {
  margin-bottom: 24px;
  animation: float 6s ease-in-out infinite;
}
.hero-photo img {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top;
  border: 4px solid var(--surface);
  box-shadow: 0 0 0 3px var(--accent), 0 8px 32px rgba(212,115,42,.2);
  display: block;
  margin: 0 auto;
}

.hero-name {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -2px;
  color: var(--text);
  margin-bottom: 20px;
}

.hero-role {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: .5px;
  margin-bottom: 18px;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.8;
}
.hero-sub strong { color: var(--text); }

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.btn-primary {
  padding: 13px 30px;
  background: var(--accent);
  color: #fff;
  border-radius: 30px;
  font-weight: 600;
  font-size: .95rem;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(212,115,42,.3);
}
.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212,115,42,.4);
}

.btn-outline {
  padding: 13px 30px;
  border: 1.5px solid var(--border);
  color: var(--text-muted);
  border-radius: 30px;
  font-weight: 600;
  font-size: .95rem;
  background: var(--surface);
  transition: border-color var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 36px;
  box-shadow: var(--shadow-sm);
  gap: 0;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 32px;
}
.stat-num {
  font-family: 'Outfit', sans-serif;
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
}
.stat-unit {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
}
.stat-label {
  font-size: .78rem;
  color: var(--text-light);
  margin-top: 4px;
  text-align: center;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
  flex-shrink: 0;
}

.scroll-indicator {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
}
.scroll-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* ── Section shared ──────────────────────────────────────── */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }

.section-label {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.section-title {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 48px;
}

/* ── Tags / Pills ────────────────────────────────────────── */
.tag {
  display: inline-flex;
  padding: 5px 14px;
  background: var(--surface-dim);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: .82rem;
  font-weight: 500;
  color: var(--text-muted);
}
.tag.sm { padding: 3px 10px; font-size: .75rem; }

.pill {
  display: inline-flex;
  padding: 7px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: .85rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}
.pill:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-light); }
.pill.highlight {
  background: var(--accent-light);
  border-color: #e8c9a5;
  color: var(--accent-dark);
}
.pill.highlight:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ── About ───────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 64px;
  align-items: start;
}
.about-text p {
  margin-bottom: 16px;
  color: var(--text-muted);
  font-size: 1.02rem;
  line-height: 1.85;
}
.about-text p strong { color: var(--text); }
.about-text p em { color: var(--accent); font-style: normal; font-weight: 600; }

.about-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}
.about-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1.5px solid var(--border);
  border-radius: 24px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface);
  transition: var(--transition);
}
.about-link svg { width: 16px; height: 16px; }
.about-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.about-card-wrap { position: sticky; top: 100px; }
.about-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 32px;
  transition: box-shadow var(--transition), transform var(--transition);
  animation: float 6s ease-in-out infinite;
}
.about-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); animation: none; }

.card-avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--accent-light);
  box-shadow: 0 0 0 2px var(--accent);
  margin-bottom: 20px;
}
.card-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  display: block;
}
.card-name {
  font-family: 'Outfit', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.card-role {
  font-size: .9rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 8px;
}
.card-loc {
  font-size: .85rem;
  color: var(--text-light);
  margin-bottom: 20px;
}
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* ── Timeline ────────────────────────────────────────────── */
.timeline {
  position: relative;
  padding-left: 28px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border));
}
.tl-item {
  position: relative;
  padding-bottom: 48px;
}
.tl-item:last-child { padding-bottom: 0; }

.tl-dot {
  position: absolute;
  left: -35px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg-alt);
  box-shadow: 0 0 0 2px var(--accent);
}
.tl-dot.isro-dot { background: var(--isro); box-shadow: 0 0 0 2px var(--isro); }

.tl-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.tl-content:hover { box-shadow: var(--shadow-md); transform: translateX(4px); }

.tl-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.tl-company {
  font-family: 'Outfit', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
}
.tl-role {
  font-size: .9rem;
  font-weight: 600;
  color: var(--accent);
  margin-top: 2px;
}
.tl-meta { text-align: right; }
.tl-date {
  display: block;
  font-size: .82rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--surface-dim);
  padding: 3px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  margin-bottom: 4px;
}
.tl-loc {
  display: block;
  font-size: .8rem;
  color: var(--text-light);
  text-align: right;
}

.tl-bullets {
  list-style: disc;
  padding-left: 18px;
  margin-bottom: 16px;
}
.tl-bullets li {
  font-size: .93rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  line-height: 1.65;
}
.tl-bullets li strong { color: var(--text); }
.tl-bullets li em { color: var(--accent); font-style: normal; font-weight: 600; }

.tl-tags { display: flex; flex-wrap: wrap; gap: 6px; }

/* ── Projects ────────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}
.project-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--accent);
}
.project-card.featured {
  grid-column: span 2;
  background: linear-gradient(135deg, #fff 0%, var(--accent-light) 100%);
  border-color: #e8c9a5;
}

.proj-badge {
  position: absolute;
  top: 20px; right: 20px;
  font-size: .72rem;
  font-weight: 700;
  padding: 4px 10px;
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
}
.proj-icon { font-size: 2rem; margin-bottom: 14px; }
.proj-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}
.proj-desc {
  font-size: .92rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  flex: 1;
}
.proj-desc strong { color: var(--text); }

.proj-stats-row {
  display: flex;
  gap: 16px;
  margin-bottom: 14px;
}
.proj-stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: .82rem;
  color: var(--text-muted);
}
.proj-stat span { font-weight: 700; color: var(--accent); font-size: 1.05rem; margin-right: 4px; }

.proj-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }

.proj-impact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
}
.proj-impact span {
  font-size: .82rem;
  color: var(--text-muted);
  padding: 5px 10px;
  background: var(--surface-dim);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.proj-link {
  display: inline-flex;
  align-items: center;
  font-size: .88rem;
  font-weight: 600;
  color: var(--accent);
  margin-top: auto;
  padding-top: 12px;
  transition: gap var(--transition);
}
.proj-link:hover { text-decoration: underline; }

/* ── Achievements ────────────────────────────────────────── */
.ach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.ach-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.ach-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--accent);
}
.ach-icon { font-size: 2rem; margin-bottom: 12px; }
.ach-num {
  font-family: 'Outfit', sans-serif;
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.1;
}
.ach-label {
  font-size: .85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Skills ──────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.skill-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.skill-group:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.skill-group-title {
  font-weight: 700;
  font-size: .95rem;
  color: var(--text);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sg-icon { font-size: 1.1rem; }
.skill-pills { display: flex; flex-wrap: wrap; gap: 8px; }

/* ── Contact ─────────────────────────────────────────────── */
.contact-inner { text-align: center; }
.contact-sub {
  font-size: 1.02rem;
  color: var(--text-muted);
  max-width: 540px;
  margin: -20px auto 48px;
  line-height: 1.8;
}
.contact-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}
.contact-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--accent);
}
.cc-icon { font-size: 1.8rem; }
.cc-label {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-light);
}
.cc-value {
  font-size: .83rem;
  font-weight: 500;
  color: var(--text-muted);
  word-break: break-all;
}

/* ── Footer ──────────────────────────────────────────────── */
footer {
  background: var(--text);
  padding: 28px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
footer .nav-logo { color: #fff; }
footer p {
  font-size: .88rem;
  color: #9a9390;
}
.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a {
  font-size: .88rem;
  color: #9a9390;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }

/* ── Scroll-reveal ──────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-card-wrap { position: static; }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .project-card.featured { grid-column: span 2; }
  .contact-cards { grid-template-columns: repeat(2, 1fr); }
  .ach-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }

  .hero-name { letter-spacing: -1px; }
  .hero-stats { padding: 20px; gap: 0; }
  .stat { padding: 0 16px; }
  .stat-num { font-size: 1.4rem; }

  .projects-grid { grid-template-columns: 1fr; }
  .project-card.featured { grid-column: span 1; }

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

  .tl-header { flex-direction: column; }
  .tl-meta { text-align: left; }

  footer .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-stats { flex-direction: column; gap: 16px; }
  .stat-divider { width: 60px; height: 1px; }
  .ach-grid { grid-template-columns: 1fr; }
  .contact-cards { grid-template-columns: 1fr; }
}