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

:root{
  --bg:#0a192f;
  --bg-light:#112240;
  --accent:#64ffda;
  --text:#ccd6f6;
  --text-dim:#8892b0;
  --white:#e6f1ff;
  --font:'Space Grotesk','Segoe UI',system-ui,-apple-system,sans-serif;
  --font-display:'Syne','Space Grotesk',system-ui,sans-serif;
  --max-w:900px;
}

html{scroll-behavior:smooth;font-size:16px;overflow-x:hidden}

body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  overflow-x:hidden;
}

a{color:var(--accent);text-decoration:none;transition:opacity .2s}
a:hover{opacity:.8}

/* ── Canvas background ─────────────────────── */
#bg-canvas{
  position:fixed;
  inset:0;
  width:100%;
  height:100%;
  z-index:0;
  pointer-events:none;
}

/* ── Header / Nav ──────────────────────────── */
header{
  position:fixed;top:0;left:0;right:0;
  z-index:10;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  background:rgba(10,25,47,.75);
  border-bottom:1px solid rgba(100,255,218,.08);
}
nav{
  max-width:var(--max-w);
  margin:auto;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:1rem 1.5rem;
  position:relative;
}
.nav-links{
  display:flex;
  gap:2rem;
}
.nav-links a{
  color:var(--text-dim);
  font-size:.875rem;
  letter-spacing:.04em;
  text-transform:uppercase;
  transition:color .2s;
}
.nav-links a:hover{color:var(--accent);opacity:1}

/* Hamburger toggle – hidden on desktop */
.nav-toggle{
  display:none;
  background:none;
  border:none;
  cursor:pointer;
  padding:.5rem;
  z-index:11;
}
.hamburger,
.hamburger::before,
.hamburger::after{
  display:block;
  width:24px;
  height:2px;
  background:var(--text);
  border-radius:2px;
  transition:transform .3s ease,opacity .3s ease;
  position:relative;
}
.hamburger::before,
.hamburger::after{
  content:'';
  position:absolute;
  left:0;
  width:24px;
}
.hamburger::before{top:-7px}
.hamburger::after{top:7px}

/* Active hamburger → X */
.nav-toggle[aria-expanded="true"] .hamburger{background:transparent}
.nav-toggle[aria-expanded="true"] .hamburger::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .hamburger::after{top:0;transform:rotate(-45deg)}

/* ── Sections ──────────────────────────────── */
section{
  position:relative;
  z-index:1;
  padding:6rem 1.5rem;
}
.container{
  max-width:var(--max-w);
  margin:auto;
}
h2{
  font-size:1.75rem;
  color:var(--white);
  margin-bottom:2rem;
  display:flex;
  align-items:center;
  gap:.75rem;
}
h2::after{
  content:'';
  flex:1;
  height:1px;
  background:rgba(100,255,218,.15);
}

/* ── Hero ──────────────────────────────────── */
#hero{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
}
.hero-content h1{
  font-family:var(--font-display);
  font-size:clamp(2.5rem,6vw,4.5rem);
  font-weight:800;
  color:var(--white);
  letter-spacing:-.02em;
  margin-bottom:.5rem;
  transition:text-shadow .4s,transform .4s,letter-spacing .4s;
  cursor:default;
  position:relative;
}
.hero-content h1:hover{
  text-shadow:
    0 0 10px rgba(100,255,218,.6),
    0 0 30px rgba(100,255,218,.4),
    0 0 60px rgba(100,255,218,.2),
    0 0 100px rgba(100,255,218,.1);
  transform:scale(1.06);
  letter-spacing:.04em;
}
.hero-content h1::after{
  content:'';
  position:absolute;
  bottom:-.1em;
  left:50%;
  width:0;
  height:3px;
  background:var(--accent);
  border-radius:2px;
  transition:width .4s ease,left .4s ease;
  box-shadow:0 0 12px var(--accent);
}
.hero-content h1:hover::after{
  width:100%;
  left:0;
}
.tagline{
  font-size:1.15rem;
  color:var(--text-dim);
  margin-bottom:2rem;
}
.social-links{
  display:flex;
  gap:1.25rem;
  justify-content:center;
}
.social-links a{
  color:var(--text-dim);
  transition:color .2s,transform .2s;
}
.social-links a:hover{
  color:var(--accent);
  transform:translateY(-3px);
  opacity:1;
}

/* ── About ─────────────────────────────────── */
#about p{margin-bottom:1rem}
.cv-note{
  color:var(--accent);
  font-style:italic;
}

/* ── Certifications ────────────────────────── */
.cert-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:1.5rem;
}
.cert-card{
  display:flex;
  flex-direction:column;
  align-items:center;
  text-align:center;
  background:var(--bg-light);
  border:1px solid rgba(100,255,218,.1);
  border-radius:12px;
  padding:2rem 1.5rem;
  transition:transform .35s ease,border-color .35s,box-shadow .35s,background .35s;
  position:relative;
  overflow:hidden;
}
.cert-card::before{
  content:'';
  position:absolute;
  inset:-2px;
  border-radius:14px;
  background:conic-gradient(from 0deg,transparent,var(--accent),transparent 30%);
  opacity:0;
  transition:opacity .4s;
  z-index:-1;
}
.cert-card:hover::before{
  opacity:1;
  animation:borderSpin 3s linear infinite;
}
@keyframes borderSpin{
  from{background:conic-gradient(from 0deg,transparent,var(--accent),transparent 30%)}
  to{background:conic-gradient(from 360deg,transparent,var(--accent),transparent 30%)}
}
.cert-card:hover{
  transform:translateY(-8px) scale(1.04);
  border-color:var(--accent);
  box-shadow:
    0 10px 40px rgba(100,255,218,.15),
    0 0 20px rgba(100,255,218,.08),
    inset 0 0 30px rgba(100,255,218,.03);
  background:linear-gradient(135deg,var(--bg-light),rgba(100,255,218,.05));
  opacity:1;
}
.cert-icon{
  color:var(--accent);
  margin-bottom:1rem;
}
.cert-card h3{
  color:var(--white);
  font-size:1rem;
  margin-bottom:.75rem;
}
.cert-link{
  font-size:.8rem;
  color:var(--text-dim);
}

/* ── Experience ────────────────────────────── */
.experience-summary{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(160px,1fr));
  gap:1.5rem;
  margin-bottom:2rem;
}
.exp-item{
  text-align:center;
  padding:1.5rem 1rem;
  background:var(--bg-light);
  border-radius:12px;
  border:1px solid rgba(100,255,218,.1);
  transition:transform .35s ease,border-color .35s,box-shadow .35s,background .35s;
  position:relative;
  overflow:hidden;
}
.exp-item::after{
  content:'';
  position:absolute;
  top:50%;left:50%;
  width:0;height:0;
  background:radial-gradient(circle,rgba(100,255,218,.08) 0%,transparent 70%);
  border-radius:50%;
  transition:width .5s ease,height .5s ease,top .5s ease,left .5s ease;
}
.exp-item:hover::after{
  width:300px;height:300px;
  top:calc(50% - 150px);left:calc(50% - 150px);
}
.exp-item:hover{
  transform:translateY(-8px) scale(1.04);
  border-color:var(--accent);
  box-shadow:
    0 12px 40px rgba(100,255,218,.15),
    0 0 20px rgba(100,255,218,.06);
  background:linear-gradient(135deg,var(--bg-light),rgba(100,255,218,.04));
}
.exp-number{
  display:block;
  font-size:2rem;
  font-weight:700;
  color:var(--accent);
  margin-bottom:.25rem;
}
.exp-label{
  font-size:.85rem;
  color:var(--text-dim);
}
.experience-detail{
  text-align:center;
  color:var(--text-dim);
}

/* ── Contact ───────────────────────────────── */
#contact{text-align:center}
#contact p{margin-bottom:2rem;color:var(--text-dim)}

#contact-form{
  max-width:500px;
  margin:auto;
}
.form-group{margin-bottom:1rem}

#contact-form input,
#contact-form textarea{
  width:100%;
  padding:.85rem 1rem;
  background:var(--bg-light);
  border:1px solid rgba(100,255,218,.15);
  border-radius:8px;
  color:var(--text);
  font-family:var(--font);
  font-size:.95rem;
  transition:border-color .2s;
}
#contact-form input:focus,
#contact-form textarea:focus{
  outline:none;
  border-color:var(--accent);
}
#contact-form input::placeholder,
#contact-form textarea::placeholder{
  color:var(--text-dim);
}

#contact-form button{
  padding:.85rem 2.5rem;
  background:transparent;
  border:1px solid var(--accent);
  color:var(--accent);
  border-radius:8px;
  font-size:.95rem;
  cursor:pointer;
  transition:background .2s,color .2s;
}
#contact-form button:hover{
  background:rgba(100,255,218,.1);
}

/* ── Footer ────────────────────────────────── */
footer{
  position:relative;
  z-index:1;
  text-align:center;
  padding:2rem 1rem;
  color:var(--text-dim);
  font-size:.8rem;
}

/* ── Scroll Reveal Animations ──────────────── */
.reveal{
  opacity:0;
  transform:translateY(40px);
  transition:opacity .8s ease,transform .8s ease;
}
.reveal.visible{
  opacity:1;
  transform:translateY(0);
}

/* Word-by-word reveal for split text */
.word{
  display:inline-block;
  opacity:0;
  transform:translateY(25px);
  transition:opacity .5s ease,transform .5s ease;
  margin-right:.25em;
}
.word.visible{
  opacity:1;
  transform:translateY(0);
}

/* Stagger delays for words (set via JS custom property) */
.reveal-words.visible .word{
  opacity:1;
  transform:translateY(0);
}

/* Slide-in variants */
.reveal-left{
  opacity:0;
  transform:translateX(-50px);
  transition:opacity .8s ease,transform .8s ease;
}
.reveal-left.visible{
  opacity:1;
  transform:translateX(0);
}
.reveal-right{
  opacity:0;
  transform:translateX(50px);
  transition:opacity .8s ease,transform .8s ease;
}
.reveal-right.visible{
  opacity:1;
  transform:translateX(0);
}

/* Scale-in variant */
.reveal-scale{
  opacity:0;
  transform:scale(.85);
  transition:opacity .6s ease,transform .6s ease;
}
.reveal-scale.visible{
  opacity:1;
  transform:scale(1);
}

/* ── Responsive ────────────────────────────── */

/* Tablet */
@media(max-width:768px){
  section{padding:5rem 1.25rem}
  h2{font-size:1.5rem}
  .cert-grid{grid-template-columns:1fr}
  .experience-summary{grid-template-columns:repeat(auto-fit,minmax(140px,1fr))}
  .tagline{font-size:1rem}
}

/* Mobile */
@media(max-width:600px){
  /* Hamburger nav */
  .nav-toggle{display:block;position:absolute;right:1rem;top:50%;transform:translateY(-50%);z-index:12}
  header.nav-open{
    bottom:0;
    backdrop-filter:none;
    -webkit-backdrop-filter:none;
    background:rgba(10,25,47,.97);
  }
  header.nav-open nav{
    height:100vh;
    align-items:center;
    justify-content:center;
  }
  nav{justify-content:center}
  .nav-links{
    display:none;
    flex-direction:column;
    align-items:center;
    gap:2.5rem;
  }
  .nav-links.open{display:flex}
  .nav-links a{font-size:1.25rem}

  section{padding:4rem 1rem}
  h2{font-size:1.35rem}
  .tagline{font-size:.95rem}
  .social-links svg{width:24px;height:24px}
  .cert-grid{grid-template-columns:1fr;gap:1rem}
  .cert-card{padding:1.5rem 1rem}
  .cert-icon svg{width:36px;height:36px}
  .experience-summary{grid-template-columns:1fr;gap:1rem}
  .exp-item{padding:1.25rem .75rem}
  .exp-number{font-size:1.6rem}
  #contact-form{max-width:100%}
  #contact-form button{width:100%;padding:.85rem 1rem}
  footer{padding:1.5rem .75rem}
}

/* Small mobile */
@media(max-width:380px){
  section{padding:3.5rem .75rem}
  .hero-content h1{letter-spacing:-.03em}
  .social-links{gap:.75rem}
  .cert-card h3{font-size:.9rem}
  .exp-label{font-size:.8rem}
}