:root{
  --navy-950:#0d1b2e;
  --navy-900:#122236;
  --navy-800:#1b2f47;
  --blue-600:#3564b4;
  --blue-500:#4a7bd1;
  --blue-100:#e7edf9;
  --sand-400:#d9a44e;
  --sand-500:#c7893a;
  --ink-900:#141a22;
  --ink-600:#4c5866;
  --ink-400:#7e807d;
  --paper-0:#ffffff;
  --paper-50:#f7f8fa;
  --paper-100:#eef1f5;
  --line-200:#e2e6ec;
  --shadow-soft:0 20px 45px -25px rgba(13,27,46,.35);
  --radius-lg:20px;
  --radius-md:14px;
  --maxw:1120px;
  --font-display:"Fraunces", Georgia, serif;
  --font-body:"Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink-900);
  background:var(--paper-0);
  -webkit-font-smoothing:antialiased;
  line-height:1.55;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3{font-family:var(--font-display);margin:0;line-height:1.15;color:var(--navy-950)}
p{margin:0}

.container{max-width:var(--maxw);margin-inline:auto;padding-inline:24px}

.bg-grid{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:
    linear-gradient(rgba(53,100,180,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53,100,180,.05) 1px, transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 70% 55% at 50% 0%, black 30%, transparent 75%);
}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.78);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line-200);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{font-family:var(--font-display);font-weight:600;font-size:1.15rem;color:var(--navy-950);letter-spacing:.01em}
.brand span{color:var(--blue-600)}
.nav-links{display:flex;align-items:center;gap:2rem}
.nav-links a{
  font-size:.92rem;font-weight:500;color:var(--ink-600);
  transition:color .2s ease;
}
.nav-links a:hover{color:var(--navy-950)}
.nav-cta{
  background:var(--navy-950);color:#fff !important;
  padding:.55rem 1.1rem;border-radius:999px;
}
.nav-cta:hover{background:var(--blue-600) !important}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:22px;height:2px;background:var(--navy-950);border-radius:2px}

/* ---------- Hero ---------- */
.hero{padding:6.5rem 24px 5rem;max-width:920px}
.eyebrow{
  font-size:.8rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--blue-600);margin-bottom:1.1rem;
}
.hero h1{
  font-size:clamp(2.1rem, 4.4vw, 3.4rem);
  font-weight:600;letter-spacing:-.01em;
  max-width:16ch;
}
.hero-lead{
  margin-top:1.4rem;font-size:1.08rem;color:var(--ink-600);max-width:56ch;
}
.hero-actions{display:flex;gap:1rem;margin-top:2.2rem;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.85rem 1.5rem;border-radius:999px;font-weight:600;font-size:.94rem;
  transition:transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn-primary{background:var(--navy-950);color:#fff}
.btn-primary:hover{background:var(--blue-600);transform:translateY(-2px);box-shadow:var(--shadow-soft)}
.btn-ghost{background:transparent;color:var(--navy-950);border:1.5px solid var(--line-200)}
.btn-ghost:hover{border-color:var(--blue-600);color:var(--blue-600);transform:translateY(-2px)}

.hero-stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1.5rem;margin-top:3.5rem;padding-top:2rem;border-top:1px solid var(--line-200);
  max-width:640px;
}
.hero-stats dt{font-size:.72rem;text-transform:uppercase;letter-spacing:.09em;color:var(--ink-400);font-weight:700}
.hero-stats dd{margin:.35rem 0 0;font-size:.92rem;font-weight:600;color:var(--navy-950)}

/* ---------- Sections ---------- */
.section{padding:5.5rem 24px}
.section-head{max-width:640px;margin-bottom:3rem}
.tag{
  display:inline-block;font-size:.76rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  color:var(--sand-500);margin-bottom:.8rem;
}
.section-head h2{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:600}
.section-sub{margin-top:.7rem;color:var(--ink-600);font-size:.98rem}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:start}
.about-text{font-size:1.05rem;color:var(--ink-600)}
.about-cards{display:flex;flex-direction:column;gap:1rem}
.card{
  background:var(--paper-50);border:1px solid var(--line-200);border-radius:var(--radius-md);
  padding:1.4rem 1.5rem;transition:transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-soft);border-color:var(--blue-500)}
.card h3{font-size:1.02rem;font-weight:600;margin-bottom:.5rem}
.card p{font-size:.92rem;color:var(--ink-600)}

/* ---------- Timeline ---------- */
.timeline{position:relative;max-width:820px;padding-left:2.2rem;border-left:2px solid var(--line-200)}
.timeline-item{position:relative;padding-bottom:3rem}
.timeline-item:last-child{padding-bottom:0}
.timeline-marker{
  position:absolute;left:-2.44rem;top:.35rem;width:12px;height:12px;border-radius:50%;
  background:var(--blue-600);box-shadow:0 0 0 5px var(--blue-100);
}
.timeline-meta{display:flex;gap:.9rem;align-items:center;margin-bottom:.4rem}
.timeline-period{
  font-size:.78rem;font-weight:700;color:var(--blue-600);letter-spacing:.03em;
  background:var(--blue-100);padding:.2rem .65rem;border-radius:999px;
}
.timeline-place{font-size:.82rem;color:var(--ink-400)}
.timeline-content h3{font-size:1.2rem;font-weight:600}
.timeline-org{color:var(--sand-500);font-weight:600;font-size:.92rem;margin-top:.15rem}
.timeline-content ul{margin-top:.9rem;display:flex;flex-direction:column;gap:.55rem}
.timeline-content li{
  font-size:.94rem;color:var(--ink-600);padding-left:1.1rem;position:relative;
}
.timeline-content li::before{
  content:"";position:absolute;left:0;top:.55em;width:5px;height:5px;border-radius:50%;background:var(--sand-400);
}
.timeline-content li strong{color:var(--navy-950)}

/* ---------- Skills graph ---------- */
.graph-wrap{
  position:relative;background:var(--navy-950);border-radius:var(--radius-lg);
  padding:1.5rem;overflow:hidden;
}
#skillsGraph{width:100%;height:auto;display:block}
.graph-tooltip{
  position:absolute;pointer-events:none;background:#fff;color:var(--navy-950);
  padding:.4rem .7rem;border-radius:8px;font-size:.82rem;font-weight:600;
  box-shadow:0 10px 25px -10px rgba(0,0,0,.4);transform:translate(-50%,-125%);
  white-space:nowrap;z-index:5;
}

.skills-fallback{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem;margin-top:2rem;
}
.skill-col{
  background:var(--paper-50);border:1px solid var(--line-200);border-radius:var(--radius-md);padding:1.4rem 1.5rem;
}
.skill-col h3{font-size:.86rem;text-transform:uppercase;letter-spacing:.06em;color:var(--blue-600);margin-bottom:.9rem}
.skill-col li{font-size:.92rem;color:var(--ink-600);padding:.3rem 0;border-bottom:1px dashed var(--line-200)}
.skill-col li:last-child{border-bottom:none}

/* ---------- Education ---------- */
.edu-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem}
.edu-col{display:flex;flex-direction:column;gap:1.5rem}
.edu-card h3{font-size:1.02rem;font-weight:600}
.edu-spec{color:var(--sand-500);font-weight:600;font-size:.88rem;margin-top:.3rem}
.edu-meta{color:var(--ink-400);font-size:.85rem;margin-top:.4rem}
.cert-card{height:100%}
.cert-list{display:flex;flex-direction:column;gap:.8rem;margin-top:.9rem}
.cert-list li{font-size:.92rem;color:var(--ink-600);padding-left:1.1rem;position:relative}
.cert-list li::before{content:"";position:absolute;left:0;top:.55em;width:5px;height:5px;border-radius:50%;background:var(--blue-600)}
.cert-list li strong{color:var(--navy-950)}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-950);color:#fff;padding:3.5rem 24px 1.5rem;margin-top:3rem}
.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1.5rem}
.footer-name{font-family:var(--font-display);font-size:1.2rem;font-weight:600}
.footer-role{color:#9fb0c6;font-size:.9rem;margin-top:.3rem}
.footer-email{
  font-weight:600;font-size:1rem;padding:.75rem 1.4rem;border:1.5px solid rgba(255,255,255,.25);
  border-radius:999px;transition:background .2s ease, border-color .2s ease;
}
.footer-email:hover{background:var(--blue-600);border-color:var(--blue-600)}
.footer-copy{text-align:center;color:#6f83a0;font-size:.78rem;margin-top:2.5rem}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease, transform .7s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ---------- Responsive ---------- */
@media (max-width:860px){
  .about-grid,.edu-grid{grid-template-columns:1fr}
  .skills-fallback{grid-template-columns:1fr}
  .hero{padding-top:5.5rem}
}
@media (max-width:720px){
  .nav-toggle{display:flex}
  .nav-links{
    position:absolute;top:72px;left:0;right:0;
    background:#fff;border-bottom:1px solid var(--line-200);
    flex-direction:column;align-items:flex-start;gap:0;
    max-height:0;overflow:hidden;transition:max-height .3s ease;
  }
  .nav-links.open{max-height:340px}
  .nav-links li{width:100%}
  .nav-links a{display:block;padding:1rem 24px;width:100%}
  .nav-cta{border-radius:0;text-align:center}
  .hero-stats{grid-template-columns:1fr}
  .footer-inner{flex-direction:column;align-items:flex-start}
}