/* ─────────────────────────────────────────────
   CSS Custom Properties — Light & Dark Themes
───────────────────────────────────────────── */
:root {
  --bg:           #F8FAFC;
  --bg-alt:       #F1F5F9;
  --surface:      #FFFFFF;
  --text:         #0F172A;
  --text-2:       #475569;
  --text-3:       #94A3B8;
  --accent:       #6366F1;
  --accent-2:     #4F46E5;
  --accent-soft:  #EEF2FF;
  --accent-rgb:   99, 102, 241;
  --green:        #10B981;
  --border:       #E2E8F0;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow:    0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -2px rgba(0,0,0,.05);
  --shadow-md: 0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -4px rgba(0,0,0,.05);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,.10), 0 8px 10px -6px rgba(0,0,0,.05);

  --radius:    12px;
  --radius-lg: 20px;
  --ease:      0.3s ease;
  --nav-h:     72px;
}

[data-theme="dark"] {
  --bg:           #0F172A;
  --bg-alt:       #0B1120;
  --surface:      #1E293B;
  --text:         #F1F5F9;
  --text-2:       #94A3B8;
  --text-3:       #475569;
  --accent:       #818CF8;
  --accent-2:     #6366F1;
  --accent-soft:  #1E1B4B;
  --accent-rgb:   129, 140, 248;
  --green:        #34D399;
  --border:       #1E293B;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
  --shadow:    0 4px 6px -1px rgba(0,0,0,.4),  0 2px 4px -2px rgba(0,0,0,.3);
  --shadow-md: 0 10px 15px -3px rgba(0,0,0,.5), 0 4px 6px -4px rgba(0,0,0,.3);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,.6), 0 8px 10px -6px rgba(0,0,0,.4);
}

/* ─────────────────────────────────────────────
   Reset & Base
───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  background: var(--bg);
  color: var(--text);
  transition: background var(--ease), color var(--ease);
  overflow-x: hidden;
}

a    { text-decoration: none; color: inherit; }
ul   { list-style: none; }
img  { max-width: 100%; display: block; }

/* ─────────────────────────────────────────────
   Layout
───────────────────────────────────────────── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section     { padding: 6rem 0; }
.section-alt { background: var(--bg-alt); }

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-label {
  display: block;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .5rem;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
}

/* ─────────────────────────────────────────────
   Buttons
───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1.75rem;
  border-radius: 50px;
  font-size: .95rem;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all .25s ease;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-2);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(var(--accent-rgb), .35);
}

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

/* ─────────────────────────────────────────────
   Navbar
───────────────────────────────────────────── */
.navbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background var(--ease), box-shadow var(--ease);
}

.navbar.scrolled {
  background: rgba(248, 250, 252, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}
[data-theme="dark"] .navbar.scrolled {
  background: rgba(15, 23, 42, 0.85);
}

.nav-container {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -.02em;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-2);
  position: relative;
  transition: color var(--ease);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width .25s ease;
}
.nav-link:hover,
.nav-link.active { color: var(--accent); }
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-2);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  transition: background var(--ease), color var(--ease);
}
.theme-toggle:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

/* Sun visible in light, moon in dark */
.icon-sun  { display: block; }
.icon-moon { display: none;  }
[data-theme="dark"] .icon-sun  { display: none;  }
[data-theme="dark"] .icon-moon { display: block; }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: .3rem;
}
.nav-hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all .3s ease;
}

/* ─────────────────────────────────────────────
   Hero
───────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4rem;
  padding: calc(var(--nav-h) + 3rem) 1.5rem 4rem;
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
}

/* Ambient background blobs */
.hero-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .12;
}
.shape-1 { width: 520px; height: 520px; background: #6366F1; top: -120px; right: -80px;  animation: blob1 9s ease-in-out infinite; }
.shape-2 { width: 420px; height: 420px; background: #8B5CF6; bottom: -60px; left: -80px; animation: blob2 11s ease-in-out infinite; }
.shape-3 { width: 300px; height: 300px; background: #06B6D4; top: 40%; left: 38%;       animation: blob3 7s ease-in-out infinite; }
.shape-4 { width: 220px; height: 220px; background: #F59E0B; bottom: 18%; right: 18%;   animation: blob2 8s ease-in-out infinite 1s reverse; }

@keyframes blob1 { 0%,100%{transform:translate(0,0) scale(1)}  50%{transform:translate(-30px,25px) scale(1.05)} }
@keyframes blob2 { 0%,100%{transform:translate(0,0) scale(1)}  50%{transform:translate(25px,-20px) scale(1.05)} }
@keyframes blob3 { 0%,100%{transform:translate(0,0) scale(1)}  50%{transform:translate(-18px,-25px) scale(.95)} }

/* Hero content */
.hero-content { flex: 1; max-width: 560px; }

.hero-eyebrow {
  display: block;
  font-size: .95rem;
  font-weight: 500;
  color: var(--text-2);
  margin-bottom: .75rem;
}

.hero-name {
  font-size: clamp(2.5rem, 7vw, 4rem);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.1;
  margin-bottom: .75rem;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2.5vw, 1.3rem);
  font-weight: 500;
  font-family: 'Fira Code', monospace;
  color: var(--accent);
  min-height: 2em;
  margin-bottom: 1.25rem;
}

.cursor { color: var(--accent); }
.blink  { animation: blink .8s step-end infinite; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

.hero-bio {
  color: var(--text-2);
  max-width: 460px;
  margin-bottom: 2rem;
}
.hero-bio strong { color: var(--text); }

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.hero-socials { display: flex; gap: .75rem; }

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px; height: 42px;
  border-radius: 50%;
  color: var(--text-2);
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: all .25s ease;
}
.social-link:hover {
  color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* Hero visual / avatar */
.hero-visual {
  position: relative;
  flex-shrink: 0;
}

.avatar-wrap {
  position: relative;
  width: 280px; height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar {
  width: 200px; height: 200px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #8B5CF6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -.02em;
  position: relative;
  z-index: 1;
  box-shadow: 0 20px 40px rgba(var(--accent-rgb), .3);
}

.avatar-img {
  width: 200px; height: 200px;
  border-radius: 50%;
  object-fit: cover;
  position: relative;
  z-index: 1;
}

.avatar-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid rgba(var(--accent-rgb), .3);
  animation: spin 12s linear infinite;
}
.avatar-ring::before {
  content: '';
  position: absolute;
  top: -5px; left: 50%;
  transform: translateX(-50%);
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent);
}
.avatar-ring-2 {
  inset: -20px;
  border-color: rgba(var(--accent-rgb), .12);
  animation: spin 20s linear infinite reverse;
}
@keyframes spin { to { transform: rotate(360deg); } }

.floating-badge {
  position: absolute;
  background: var(--surface);
  border-radius: var(--radius);
  padding: .55rem 1rem;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .8rem;
  font-weight: 600;
  white-space: nowrap;
  border: 1px solid var(--border);
}
.badge-1 { bottom: 10px; left: -30px; animation: bob 4s ease-in-out infinite; }
.badge-2 { top: 10px; right: -30px;   animation: bob 4s ease-in-out infinite .6s; }
@keyframes bob { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }

/* ─────────────────────────────────────────────
   About
───────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about-text p        { color: var(--text-2); margin-bottom: 1rem; }
.about-text strong   { color: var(--text); }

.about-langs {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}
.lang-tag {
  background: var(--accent-soft);
  color: var(--accent);
  padding: .4rem .9rem;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 600;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.stat-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform .25s ease, box-shadow .25s ease;
}
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: .4rem;
}
.stat-label { font-size: .8rem; color: var(--text-2); font-weight: 500; }

/* ─────────────────────────────────────────────
   Skills
───────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.skill-category {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease;
}
.skill-category:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

.skill-cat-title {
  font-size: .85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--text);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.skill-cat-title svg { color: var(--accent); flex-shrink: 0; }

.skill-tags { display: flex; flex-wrap: wrap; gap: .5rem; }

.skill-tag {
  background: var(--bg-alt);
  color: var(--text-2);
  padding: .35rem .85rem;
  border-radius: 50px;
  font-size: .82rem;
  font-weight: 500;
  border: 1px solid var(--border);
  cursor: default;
  transition: all .2s ease;
}
.skill-tag:hover {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: rgba(var(--accent-rgb), .4);
  transform: scale(1.05);
}
.skill-tag-cert {
  background: linear-gradient(135deg, rgba(var(--accent-rgb),.1), rgba(139,92,246,.1));
  color: var(--accent);
  border-color: rgba(var(--accent-rgb), .25);
}

/* ─────────────────────────────────────────────
   Projects
───────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* Center a lone card on the last row when 4 items fill a 3-col grid */
.projects-grid .project-card:last-child:nth-child(3n + 1) {
  grid-column: 2 / 3;
}

.project-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform .3s ease, box-shadow .3s ease;
}
.project-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }

.project-img {
  height: 160px;
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: 1rem;
  overflow: hidden;
}
.project-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: inherit;
  opacity: 0;
  transition: opacity .3s ease;
}
.project-card:hover .project-img::after { opacity: .15; }

.project-img-1 { background: linear-gradient(135deg, #6366F1, #8B5CF6); }
.project-img-2 { background: linear-gradient(135deg, #0EA5E9, #06B6D4); }
.project-img-3 { background: linear-gradient(135deg, #F59E0B, #EF4444); }
.project-img-4 { background: linear-gradient(135deg, #EF4444, #F97316); }
.project-img-5 { background: linear-gradient(135deg, #06B6D4, #10B981); }
.project-img-6 { background: linear-gradient(135deg, #4F46E5, #7C3AED); }

.project-img-label {
  background: rgba(255,255,255,.2);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: .72rem;
  font-weight: 700;
  padding: .3rem .7rem;
  border-radius: 50px;
  letter-spacing: .08em;
  text-transform: uppercase;
  position: relative;
  z-index: 1;
}

.project-body { padding: 1.5rem; }

.project-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: .6rem;
}

.project-desc {
  font-size: .875rem;
  color: var(--text-2);
  line-height: 1.6;
  margin-bottom: 1rem;
}
.project-desc code {
  font-family: 'Fira Code', monospace;
  font-size: .8em;
  background: var(--accent-soft);
  color: var(--accent);
  padding: .1em .4em;
  border-radius: 4px;
}

.project-tech { display: flex; flex-wrap: wrap; gap: .4rem; }

.tech-tag {
  font-size: .75rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  padding: .2rem .6rem;
  border-radius: 50px;
}

/* ─────────────────────────────────────────────
   Timeline / Experience
───────────────────────────────────────────── */
.timeline {
  position: relative;
  padding-left: 2rem;
  max-width: 750px;
  margin: 0 auto;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-item { position: relative; margin-bottom: 2rem; }

.timeline-dot {
  position: absolute;
  left: -2.45rem; top: 1.25rem;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg-alt);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .2);
}
.timeline-dot-service {
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(16,185,129,.2);
}

.timeline-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease;
}
.timeline-card:hover { transform: translateX(4px); box-shadow: var(--shadow-md); }

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.timeline-role    { font-size: 1rem; font-weight: 700; margin-bottom: .2rem; }
.timeline-company { font-size: .875rem; color: var(--accent); font-weight: 500; }

.timeline-date {
  font-size: .78rem;
  font-weight: 600;
  color: var(--text-3);
  background: var(--bg-alt);
  padding: .25rem .7rem;
  border-radius: 50px;
  border: 1px solid var(--border);
  white-space: nowrap;
}

.timeline-duties { list-style: disc; padding-left: 1.25rem; }
.timeline-duties li {
  font-size: .875rem;
  color: var(--text-2);
  margin-bottom: .4rem;
}

/* ─────────────────────────────────────────────
   Education
───────────────────────────────────────────── */
.edu-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  max-width: 750px;
  margin: 0 auto;
  transition: transform .25s ease, box-shadow .25s ease;
}
.edu-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

.edu-icon { font-size: 3rem; flex-shrink: 0; }

.edu-degree { font-size: 1.2rem; font-weight: 800; margin-bottom: .25rem; }
.edu-minor  { font-size: .9rem; color: var(--accent); font-weight: 600; margin-bottom: .5rem; }
.edu-school { font-size: .9rem; color: var(--text-2); margin-bottom: .25rem; }
.edu-date   { font-size: .85rem; color: var(--text-3); margin-bottom: 1.25rem; }

.edu-courses { display: flex; flex-wrap: wrap; gap: .4rem; }
.course-tag {
  font-size: .78rem;
  background: var(--bg-alt);
  color: var(--text-2);
  padding: .25rem .65rem;
  border-radius: 50px;
  border: 1px solid var(--border);
}

/* ─────────────────────────────────────────────
   Contact
───────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
  max-width: 850px;
  margin: 0 auto;
}

.contact-text p { color: var(--text-2); margin-bottom: 1.5rem; }

.contact-links { display: flex; flex-direction: column; gap: .75rem; }

.contact-link {
  display: flex;
  align-items: center;
  gap: .75rem;
  color: var(--text-2);
  font-size: .9rem;
  font-weight: 500;
  transition: color .2s ease;
}
.contact-link:hover { color: var(--accent); }

.contact-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}

.contact-card-label {
  font-size: .78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text-3);
  margin-bottom: 1rem;
}

.opportunity-list { display: flex; flex-direction: column; gap: .75rem; }
.opportunity-list li {
  display: flex;
  align-items: center;
  gap: .75rem;
  font-size: .9rem;
  color: var(--text-2);
  font-weight: 500;
}
.opportunity-list li svg { color: var(--green); flex-shrink: 0; }

/* ─────────────────────────────────────────────
   Footer
───────────────────────────────────────────── */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  text-align: center;
}
.footer p      { font-size: .9rem; color: var(--text-2); }
.footer strong { color: var(--accent); }
.footer-sub    { font-size: .8rem; color: var(--text-3); margin-top: .25rem; }

/* ─────────────────────────────────────────────
   Scroll-reveal animations
───────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .65s ease, transform .65s ease;
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-hero {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp .85s ease forwards;
}
.reveal-hero-right {
  opacity: 0;
  transform: translateX(24px);
  animation: fadeUp .85s ease .25s forwards;
}
@keyframes fadeUp { to { opacity: 1; transform: translate(0,0); } }

/* ─────────────────────────────────────────────
   Responsive
───────────────────────────────────────────── */
@media (max-width: 960px) {
  .hero        { flex-direction: column; text-align: center; gap: 3rem; }
  .hero-cta,
  .hero-socials { justify-content: center; }
  .hero-bio    { max-width: 100%; }
  .about-grid,
  .contact-grid { grid-template-columns: 1fr; }
  .skills-grid  { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--surface);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    box-shadow: var(--shadow-md);
    border-top: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-hamburger  { display: flex; }

  .section { padding: 4rem 0; }
  .about-stats { grid-template-columns: repeat(2,1fr); }
  .edu-card    { flex-direction: column; gap: 1rem; }
  .badge-1,
  .badge-2     { display: none; }
}

@media (max-width: 540px) {
  .projects-grid { grid-template-columns: 1fr; }
  .hero-name     { font-size: 2.5rem; }
}