/* ================================================================
   CSS CUSTOM PROPERTIES
   ================================================================ */
:root {
  --bg:           #0A0F1E;
  --surface:      #111827;
  --accent:       #00F5D4;
  --accent-2:     #7C3AED;
  --text:         #F1F5F9;
  --text-muted:   #94A3B8;
  --border-glow:  rgba(0,245,212,0.2);
  --glass-bg:     rgba(255,255,255,0.03);
  --glass-border: 1px solid rgba(0,245,212,0.15);
  --font-sans:    'Inter', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
  --ease:         cubic-bezier(0.4, 0, 0.2, 1);
  --transition:   0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --radius:       12px;
}

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

/* ================================================================
   CUSTOM CURSOR
   ================================================================ */
.cursor-dot {
  position: fixed; top: 0; left: 0;
  width: 10px; height: 10px;
  background: var(--accent);
  border-radius: 50%;
  pointer-events: none; z-index: 9999;
  transform: translate(-50%, -50%);
  transition: width .2s, height .2s, background .2s;
  box-shadow: 0 0 12px var(--accent), 0 0 24px var(--accent);
  will-change: transform;
}
.cursor-trail {
  position: fixed; top: 0; left: 0;
  width: 32px; height: 32px;
  border: 1.5px solid rgba(0,245,212,.5);
  border-radius: 50%;
  pointer-events: none; z-index: 9998;
  transform: translate(-50%, -50%);
  will-change: transform;
}
body:has(a:hover) .cursor-dot,
body:has(button:hover) .cursor-dot {
  width: 16px; height: 16px;
  background: var(--accent-2);
  box-shadow: 0 0 16px var(--accent-2), 0 0 30px var(--accent-2);
}

/* ================================================================
   TOAST
   ================================================================ */
.toast {
  position: fixed; bottom: 2rem; left: 50%;
  transform: translateX(-50%) translateY(120px);
  background: var(--surface);
  color: var(--accent);
  border: var(--glass-border);
  padding: .75rem 1.75rem;
  border-radius: 50px;
  font-size: .88rem;
  font-family: var(--font-mono);
  z-index: 9000;
  backdrop-filter: blur(12px);
  transition: transform .4s cubic-bezier(.34,1.56,.64,1);
  pointer-events: none;
  box-shadow: 0 8px 32px rgba(0,0,0,.4);
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* ================================================================
   NAVBAR
   ================================================================ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1.5rem 0;
  transition: padding var(--transition), background var(--transition),
              backdrop-filter var(--transition), box-shadow var(--transition);
}
.navbar.scrolled {
  padding: .8rem 0;
  background: rgba(10,15,30,.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border-glow);
}
.nav-container {
  max-width: 1200px; margin: 0 auto;
  padding: 0 2rem;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.4rem; font-weight: 700;
  color: var(--accent);
  letter-spacing: .05em;
  text-shadow: 0 0 20px rgba(0,245,212,.5);
  transition: text-shadow var(--transition);
}
.nav-logo:hover { text-shadow: 0 0 40px rgba(0,245,212,.9); }
.nav-links {
  display: flex; align-items: center; gap: 2.5rem;
}
.nav-link {
  font-size: .88rem; font-weight: 500;
  color: var(--text-muted);
  position: relative;
  letter-spacing: .06em;
  text-transform: uppercase;
  transition: color var(--transition);
}
.nav-link::after {
  content: ''; position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav-link:hover,
.nav-link.active { color: var(--accent); }
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

.nav-hamburger {
  display: none; flex-direction: column;
  gap: 5px; background: none; border: none;
  padding: 4px; cursor: none; z-index: 1001;
}
.nav-hamburger span {
  display: block; width: 24px; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: var(--transition);
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ================================================================
   HERO
   ================================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
#particle-canvas {
  position: absolute; inset: 0; z-index: 0;
}
.hero-content {
  position: relative; z-index: 1;
  text-align: center; padding: 0 1.5rem;
  max-width: 820px;
}
.hero-greeting {
  font-family: var(--font-mono);
  font-size: .95rem; color: var(--accent);
  letter-spacing: .22em; text-transform: uppercase;
  margin-bottom: .75rem;
  opacity: 0; animation: fadeSlideUp .8s .2s forwards;
}
.hero-name {
  font-size: clamp(2.8rem, 8vw, 6.5rem);
  font-weight: 900; line-height: 1.05;
  background: linear-gradient(135deg, var(--accent) 0%, #5eead4 40%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.25rem;
  opacity: 0; animation: fadeSlideUp .8s .4s forwards;
}
.hero-typewriter {
  font-family: var(--font-mono);
  font-size: clamp(.95rem, 2.5vw, 1.35rem);
  color: var(--text-muted);
  height: 2em; margin-bottom: 1.25rem;
  opacity: 0; animation: fadeSlideUp .8s .6s forwards;
}
.typewriter-cursor {
  color: var(--accent); animation: blink 1s step-end infinite;
}
@keyframes blink { 0%,100% { opacity:1; } 50% { opacity:0; } }

.hero-tagline {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-muted); margin-bottom: 2.5rem;
  opacity: 0; animation: fadeSlideUp .8s .8s forwards;
}
.hero-ctas {
  display: flex; gap: 1rem; justify-content: center;
  flex-wrap: wrap; margin-bottom: 2.5rem;
  opacity: 0; animation: fadeSlideUp .8s 1s forwards;
}
.hero-socials {
  display: flex; gap: 1.25rem; justify-content: center;
  opacity: 0; animation: fadeSlideUp .8s 1.2s forwards;
}
.social-icon {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border-glow);
  border-radius: 50%; color: var(--text-muted);
  transition: var(--transition);
}
.social-icon svg { width: 20px; height: 20px; }
.social-icon:hover {
  border-color: var(--accent); color: var(--accent);
  box-shadow: 0 0 16px rgba(0,245,212,.3);
  transform: translateY(-3px);
}

/* scroll indicator */
.scroll-indicator {
  position: absolute; bottom: 2.5rem; left: 50%;
  transform: translateX(-50%); z-index: 1;
  display: flex; align-items: center; justify-content: center;
}
.scroll-chevron {
  width: 22px; height: 22px;
  border-right: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(45deg);
  animation: scrollBounce 1.6s ease-in-out infinite;
  opacity: .7;
}
@keyframes scrollBounce {
  0%,100% { transform: rotate(45deg) translateY(0); opacity:.7; }
  50%      { transform: rotate(45deg) translateY(7px); opacity:1; }
}

/* ================================================================
   BUTTONS
   ================================================================ */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .82rem 2rem; border-radius: 50px;
  font-weight: 600; font-size: .95rem;
  border: none; transition: transform var(--transition), box-shadow var(--transition);
  letter-spacing: .03em; font-family: var(--font-sans);
}
.btn:hover { transform: translateY(-2px) scale(1.03); }
.btn-primary {
  background: var(--accent); color: var(--bg);
  box-shadow: 0 4px 20px rgba(0,245,212,.25);
}
.btn-primary:hover { box-shadow: 0 8px 32px rgba(0,245,212,.5); }
.btn-secondary {
  background: transparent; color: var(--text);
  border: 1px solid var(--border-glow);
}
.btn-secondary:hover {
  border-color: var(--accent); color: var(--accent);
  box-shadow: 0 4px 20px rgba(0,245,212,.15);
}
.btn-sm { padding: .48rem 1.2rem; font-size: .83rem; }
.btn-glow {
  font-family: var(--font-mono);
  animation: pulseGlow 2.5s ease-in-out infinite;
}
@keyframes pulseGlow {
  0%,100% { box-shadow: 0 4px 20px rgba(0,245,212,.25); }
  50%      { box-shadow: 0 4px 48px rgba(0,245,212,.7), 0 0 80px rgba(0,245,212,.15); }
}

/* ================================================================
   SECTIONS
   ================================================================ */
.section { padding: 7rem 0; }
.section-alt { background: var(--surface); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

.section-title {
  text-align: center;
  font-size: clamp(1.8rem, 5vw, 2.7rem);
  font-weight: 800; margin-bottom: 4rem;
  position: relative; color: var(--text);
}
.section-title::after {
  content: ''; position: absolute;
  bottom: -12px; left: 50%; transform: translateX(-50%);
  width: 48px; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 2px;
}

/* ================================================================
   ABOUT
   ================================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 5rem; align-items: center;
}
.about-avatar-wrap { display: flex; justify-content: center; }
.avatar-ring {
  position: relative;
  width: 280px; height: 280px;
  border-radius: 50%; padding: 4px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  animation: ringHue 6s linear infinite;
}
.avatar-ring::before {
  content: ''; position: absolute;
  inset: -12px; border-radius: 50%;
  border: 1px solid rgba(0,245,212,.3);
  animation: ringPulse 3s ease-in-out infinite;
}
.avatar-ring::after {
  content: ''; position: absolute;
  inset: -24px; border-radius: 50%;
  border: 1px solid rgba(124,58,237,.2);
  animation: ringPulse 3s 1.5s ease-in-out infinite;
}
@keyframes ringHue   { from { filter: hue-rotate(0deg); } to { filter: hue-rotate(360deg); } }
@keyframes ringPulse { 0%,100% { opacity:.3; transform:scale(1); } 50% { opacity:.8; transform:scale(1.05); } }
.avatar-img {
  width: 100%; height: 100%;
  border-radius: 50%; object-fit: cover;
}

.about-text p { color: var(--text-muted); margin-bottom: 1.25rem; }
.about-lead { font-size: 1.12rem !important; color: var(--text) !important; font-weight: 500; }
.about-text strong { color: var(--accent); }

.about-stats {
  display: grid; grid-template-columns: repeat(4,1fr);
  gap: 1.5rem; margin-top: 2.5rem;
  padding-top: 2rem; border-top: 1px solid var(--border-glow);
}
.stat { text-align: center; }
.stat-number {
  font-size: 2.2rem; font-weight: 800;
  color: var(--accent); font-family: var(--font-mono);
  display: block; line-height: 1;
}
.stat-plus { color: var(--accent); font-size: 1.5rem; font-weight: 800; }
.stat-label {
  display: block; font-size: .77rem;
  color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .1em; margin-top: .3rem;
}

/* ================================================================
   SKILLS
   ================================================================ */
.skills-grid {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 2rem;
}
.skills-category {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: var(--glass-border);
  border-radius: var(--radius); padding: 2rem;
  transition: transform var(--transition), box-shadow var(--transition);
}
.skills-category:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 48px rgba(0,245,212,.07);
}
.skills-cat-title {
  font-size: 1.05rem; font-weight: 700;
  color: var(--text); margin-bottom: 1.5rem;
  display: flex; align-items: center; gap: .5rem;
}
.cat-icon { font-size: 1.15rem; }
.skill-badges { display: flex; flex-wrap: wrap; gap: .55rem; }
.badge {
  display: inline-block;
  padding: .38rem .9rem;
  background: rgba(0,245,212,.05);
  border: 1px solid rgba(0,245,212,.18);
  border-radius: 50px;
  font-size: .78rem; font-weight: 500;
  color: var(--accent); font-family: var(--font-mono);
  opacity: 0; transform: translateY(10px);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition), opacity var(--transition);
}
.badge.visible { opacity: 1; transform: translateY(0); }
.badge:hover {
  background: rgba(0,245,212,.14);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,245,212,.2);
}

/* ================================================================
   PROJECTS
   ================================================================ */
.projects-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 2rem; }
.project-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: var(--glass-border);
  border-radius: var(--radius); overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  transform-style: preserve-3d;
  will-change: transform;
}
.project-card:hover {
  box-shadow: 0 24px 64px rgba(0,245,212,.12), 0 0 0 1px rgba(0,245,212,.3);
  border-color: rgba(0,245,212,.35);
}
.project-image {
  position: relative; overflow: hidden;
  aspect-ratio: 16/9;
}
.project-image img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .5s var(--ease), filter .5s var(--ease);
}
.project-card:hover .project-image img {
  transform: scale(1.08); filter: blur(3px) brightness(.7);
}
.project-overlay {
  position: absolute; inset: 0;
  background: rgba(10,15,30,.88);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 1.25rem; padding: 1.5rem;
  opacity: 0; transform: translateY(16px);
  transition: opacity .4s, transform .4s;
  text-align: center;
}
.project-overlay p { color: var(--text-muted); font-size: .88rem; margin: 0; }
.project-card:hover .project-overlay { opacity: 1; transform: translateY(0); }
.project-links { display: flex; gap: .75rem; }
.project-info { padding: 1.2rem 1.5rem; }
.project-info h3 {
  font-size: 1.05rem; font-weight: 700;
  color: var(--text); margin-bottom: .7rem;
}
.project-tags { display: flex; flex-wrap: wrap; gap: .45rem; }
.project-tags span {
  font-size: .73rem; font-family: var(--font-mono);
  color: var(--accent-2);
  background: rgba(124,58,237,.1);
  border: 1px solid rgba(124,58,237,.25);
  padding: .22rem .62rem; border-radius: 50px;
}

/* ================================================================
   TIMELINE
   ================================================================ */
.timeline { position: relative; max-width: 820px; margin: 0 auto; }
.timeline::before {
  content: ''; position: absolute;
  left: 24px; top: 0; bottom: 0; width: 1px;
  background: linear-gradient(to bottom, transparent, var(--accent), var(--accent-2), transparent);
}
.timeline-item {
  position: relative; padding-left: 72px;
  margin-bottom: 3rem;
  opacity: 0; transform: translateX(-28px);
  transition: opacity .65s var(--ease), transform .65s var(--ease);
}
.timeline-item.visible { opacity: 1; transform: translateX(0); }
.timeline-dot {
  position: absolute; left: 16px; top: 22px;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--accent); border: 3px solid var(--bg);
  box-shadow: 0 0 0 2px var(--accent), 0 0 18px rgba(0,245,212,.5);
  z-index: 1;
  transition: transform var(--transition), box-shadow var(--transition);
}
.timeline-item:hover .timeline-dot {
  transform: scale(1.5);
  box-shadow: 0 0 0 3px var(--accent), 0 0 28px rgba(0,245,212,.7);
}
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: var(--glass-border);
  border-radius: var(--radius); padding: 1.75rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.glass-card:hover {
  border-color: rgba(0,245,212,.35);
  box-shadow: 0 8px 32px rgba(0,245,212,.07);
}
.timeline-date {
  font-family: var(--font-mono); font-size: .78rem;
  color: var(--accent); letter-spacing: .05em;
  display: block; margin-bottom: .5rem;
}
.timeline-content h3 {
  font-size: 1.15rem; font-weight: 700;
  color: var(--text); margin-bottom: .25rem;
}
.timeline-content h4 {
  font-size: .92rem; font-weight: 500;
  color: var(--text-muted); margin-bottom: 1rem;
}
.timeline-content ul { margin-bottom: 1.25rem; }
.timeline-content ul li {
  position: relative; padding-left: 1.25rem;
  color: var(--text-muted); font-size: .88rem;
  margin-bottom: .5rem;
}
.timeline-content ul li::before {
  content: '\2192'; position: absolute;
  left: 0; color: var(--accent); font-size: .8rem;
}
.timeline-content strong { color: var(--text); }
.timeline-tech { display: flex; flex-wrap: wrap; gap: .45rem; }
.timeline-tech span {
  font-size: .73rem; font-family: var(--font-mono);
  color: var(--text-muted);
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  padding: .2rem .6rem; border-radius: 4px;
}

/* ================================================================
   EDUCATION / CONFERENCES GRID
   ================================================================ */
.edu-grid {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 1.75rem; margin-top: 5rem;
}
.edu-card { text-align: center; padding: 2rem 1.5rem; }
.edu-icon { font-size: 2rem; margin-bottom: .75rem; display: block; }
.edu-card h3 { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: .5rem; }
.edu-card p { color: var(--text-muted); font-size: .88rem; margin: 0; }
.edu-certs { color: var(--accent) !important; font-family: var(--font-mono); font-size: .78rem !important; margin-top: .4rem !important; }

/* ================================================================
   CONTACT
   ================================================================ */
.contact-section { text-align: center; }
.contact-lead {
  color: var(--text-muted); font-size: 1.08rem;
  max-width: 520px; margin: 0 auto 2.5rem;
}
.contact-hint {
  color: var(--text-muted); font-size: .78rem;
  margin-top: .75rem; font-family: var(--font-mono);
  letter-spacing: .06em; opacity: .7;
}
.contact-socials {
  display: flex; justify-content: center; gap: 1rem; margin-top: 3rem;
}
.social-btn {
  display: inline-flex; align-items: center; gap: .6rem;
  padding: .7rem 1.6rem;
  border: 1px solid var(--border-glow);
  border-radius: 50px; color: var(--text-muted);
  font-size: .9rem; font-weight: 500;
  transition: var(--transition);
}
.social-btn svg { width: 18px; height: 18px; }
.social-btn:hover {
  border-color: var(--accent); color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,245,212,.15);
}

/* ================================================================
   FOOTER
   ================================================================ */
.footer {
  padding: 2rem 0; text-align: center;
  border-top: 1px solid var(--border-glow);
  color: var(--text-muted); font-size: .82rem;
  font-family: var(--font-mono);
}

/* ================================================================
   SCROLL REVEAL
   ================================================================ */
.reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ================================================================
   KEYFRAMES
   ================================================================ */
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 1024px) {
  .about-stats    { grid-template-columns: repeat(2,1fr); }
  .skills-grid    { grid-template-columns: 1fr 1fr; }
  .projects-grid  { grid-template-columns: 1fr 1fr; }
  .edu-grid       { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .cursor-dot, .cursor-trail { display: none; }
  body { cursor: auto; }
  button { cursor: pointer; }

  .nav-links {
    position: fixed; top: 0; right: -100%;
    height: 100vh; width: 260px;
    background: rgba(10,15,30,.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center; align-items: center;
    gap: 2.5rem;
    transition: right .4s var(--ease);
    border-left: var(--glass-border);
  }
  .nav-links.open { right: 0; }
  .nav-link { font-size: 1.1rem; }
  .nav-hamburger { display: flex; }

  .about-grid       { grid-template-columns: 1fr; gap: 3rem; }
  .about-stats      { grid-template-columns: repeat(2,1fr); }
  .skills-grid      { grid-template-columns: 1fr; }
  .projects-grid    { grid-template-columns: 1fr; }
  .edu-grid         { grid-template-columns: 1fr; }
  .hero-ctas        { flex-direction: column; align-items: center; }
  .contact-socials  { flex-direction: column; align-items: center; }
}
@media (max-width: 480px) {
  .section       { padding: 5rem 0; }
  .avatar-ring   { width: 220px; height: 220px; }
  .timeline::before { left: 12px; }
  .timeline-item    { padding-left: 48px; }
  .timeline-dot     { left: 4px; }
  .about-stats   { grid-template-columns: repeat(2,1fr); gap: 1rem; }
}

/* ================================================================
   REDUCED MOTION
   ================================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .cursor-dot, .cursor-trail { display: none; }
  body { cursor: auto; }
  button { cursor: pointer; }
}