:root{
  --navy-950:#0a0f1a;
  --navy-900:#0d1420;
  --navy-800:#121b2b;
  --navy-700:#1a2638;
  --green-400:#34d399;
  --green-500:#10b981;
  --green-600:#059669;
  --text-100:#f5f7fa;
  --text-300:#c4cdd8;
  --text-500:#8792a3;
  --border:#223049;
  --radius:16px;
  --max-w:1140px;
  --font-head:'Sora', 'Inter', sans-serif;
  --font-body:'Inter', sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-body);
  background:var(--navy-950);
  color:var(--text-300);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;}
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px;}

/* ===== NAV ===== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(10,15,26,0.7);
  backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:all .3s ease;
}
.nav.scrolled{
  background:rgba(10,15,26,0.92);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  max-width:var(--max-w);margin:0 auto;padding:16px 24px;
  display:flex;align-items:center;justify-content:space-between;
}
.brand{
  font-family:var(--font-head);font-weight:800;font-size:22px;color:var(--text-100);
}
.brand span{color:var(--green-400);}
.nav-links{display:flex;align-items:center;gap:32px;}
.nav-links a{
  font-size:14px;font-weight:500;color:var(--text-300);
  transition:color .2s ease;position:relative;
}
.nav-links a:not(.nav-cta):hover{color:var(--text-100);}
.nav-cta{
  background:var(--green-500);color:var(--navy-950)!important;
  padding:9px 20px;border-radius:999px;font-weight:600!important;
  transition:background .2s ease, transform .2s ease;
}
.nav-cta:hover{background:var(--green-400);transform:translateY(-1px);}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px;}
.nav-toggle span{width:24px;height:2px;background:var(--text-100);border-radius:2px;transition:all .25s ease;}

/* ===== HERO ===== */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  padding-top:90px;overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;
  background:url('assets/hero-bg.jpg') center/cover no-repeat;
  transform:scale(1.05);
}
.hero-overlay{
  position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(10,15,26,0.55) 0%, rgba(10,15,26,0.85) 60%, var(--navy-950) 100%);
}
.hero-content{position:relative;z-index:2;}
.eyebrow{
  color:var(--green-400);font-weight:600;font-size:14px;letter-spacing:.04em;
  margin-bottom:18px;
}
.hero h1{
  font-family:var(--font-head);font-weight:800;color:var(--text-100);
  font-size:clamp(42px,7vw,76px);line-height:1.05;margin-bottom:22px;
  letter-spacing:-0.02em;
}
.hero-sub{
  max-width:620px;font-size:18px;color:var(--text-300);margin-bottom:36px;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:64px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 28px;border-radius:999px;font-weight:600;font-size:15px;
  transition:all .25s ease;cursor:pointer;border:1px solid transparent;
}
.btn-primary{background:var(--green-500);color:var(--navy-950);}
.btn-primary:hover{background:var(--green-400);transform:translateY(-2px);box-shadow:0 10px 30px -10px rgba(16,185,129,.5);}
.btn-ghost{border-color:var(--border);color:var(--text-100);}
.btn-ghost:hover{border-color:var(--green-400);color:var(--green-400);}

.hero-stats{display:flex;gap:48px;flex-wrap:wrap;}
.stat{display:flex;flex-direction:column;}
.stat-num{font-family:var(--font-head);font-size:28px;font-weight:700;color:var(--text-100);}
.stat-label{font-size:13px;color:var(--text-500);margin-top:4px;}

.scroll-down{
  position:absolute;bottom:32px;left:50%;transform:translateX(-50%);
  width:26px;height:42px;border:2px solid var(--text-500);border-radius:20px;
  z-index:2;
}
.scroll-down span{
  position:absolute;top:8px;left:50%;transform:translateX(-50%);
  width:4px;height:8px;background:var(--green-400);border-radius:2px;
  animation:scrollDown 1.8s infinite;
}
@keyframes scrollDown{
  0%{opacity:1;top:8px;}
  70%{opacity:0;top:22px;}
  100%{opacity:0;top:22px;}
}

/* ===== SECTIONS ===== */
.section{padding:120px 0;}
.section-alt{background:var(--navy-900);}
.section-tag{
  color:var(--green-400);font-weight:600;font-size:13px;letter-spacing:.08em;
  text-transform:uppercase;margin-bottom:14px;
}
.section-title{
  font-family:var(--font-head);font-weight:700;color:var(--text-100);
  font-size:clamp(28px,4vw,40px);margin-bottom:48px;max-width:720px;letter-spacing:-0.01em;
}

/* reveal animation */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease, transform .7s ease;}
.reveal.visible{opacity:1;transform:translateY(0);}

/* ===== ABOUT ===== */
.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:56px;align-items:start;}
.about-text p{margin-bottom:20px;font-size:16px;}
.about-highlights{display:flex;flex-direction:column;gap:14px;margin-top:28px;}
.highlight{display:flex;align-items:center;gap:12px;color:var(--text-100);font-weight:500;font-size:15px;}
.dot{width:8px;height:8px;border-radius:50%;background:var(--green-400);flex-shrink:0;}
.about-card{
  background:var(--navy-800);border:1px solid var(--border);border-radius:var(--radius);
  padding:32px;
}
.about-card h3{font-family:var(--font-head);color:var(--text-100);margin-bottom:20px;font-size:18px;}
.facts li{display:flex;flex-direction:column;gap:4px;padding:14px 0;border-top:1px solid var(--border);}
.facts li:first-child{border-top:none;padding-top:0;}
.facts strong{color:var(--text-100);font-size:13px;text-transform:uppercase;letter-spacing:.04em;}
.facts span{font-size:15px;color:var(--text-300);}

/* ===== SKILLS ===== */
.skills-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.skill-card{
  background:var(--navy-800);border:1px solid var(--border);border-radius:var(--radius);
  padding:28px;transition:transform .25s ease, border-color .25s ease;
}
.skill-card:hover{transform:translateY(-4px);border-color:var(--green-500);}
.skill-icon{
  width:44px;height:44px;margin-bottom:18px;color:var(--green-400);
  background:rgba(16,185,129,.1);border-radius:10px;
  display:flex;align-items:center;justify-content:center;
}
.skill-icon svg{width:24px;height:24px;}
.skill-card h3{font-family:var(--font-head);color:var(--text-100);font-size:17px;margin-bottom:10px;}
.skill-card p{font-size:14px;color:var(--text-500);}

/* ===== TIMELINE ===== */
.timeline{position:relative;padding-left:32px;}
.timeline::before{
  content:'';position:absolute;left:5px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(var(--green-500), var(--border));
}
.timeline-item{position:relative;margin-bottom:56px;}
.timeline-item:last-child{margin-bottom:0;}
.timeline-dot{
  position:absolute;left:-32px;top:4px;width:12px;height:12px;border-radius:50%;
  background:var(--green-400);box-shadow:0 0 0 4px rgba(16,185,129,.2);
}
.timeline-date{
  display:inline-block;color:var(--green-400);font-weight:600;font-size:13px;
  letter-spacing:.04em;margin-bottom:8px;
}
.timeline-content h3{font-family:var(--font-head);color:var(--text-100);font-size:20px;margin-bottom:4px;}
.timeline-company{color:var(--text-500);font-size:14px;margin-bottom:16px;font-style:italic;}
.timeline-content ul{display:flex;flex-direction:column;gap:10px;}
.timeline-content li{font-size:15px;position:relative;padding-left:18px;}
.timeline-content li::before{
  content:'';position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;
  background:var(--text-500);
}
.timeline-content li strong{color:var(--text-100);}

/* ===== PROJECTS ===== */
.projects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.project-card{
  background:var(--navy-800);border:1px solid var(--border);border-radius:var(--radius);
  padding:28px;display:flex;flex-direction:column;transition:transform .25s ease, border-color .25s ease;
}
.project-card:hover{transform:translateY(-4px);border-color:var(--green-500);}
.project-tag{
  align-self:flex-start;background:rgba(16,185,129,.12);color:var(--green-400);
  font-size:12px;font-weight:600;padding:5px 12px;border-radius:999px;margin-bottom:16px;
}
.project-card h3{font-family:var(--font-head);color:var(--text-100);font-size:18px;margin-bottom:10px;}
.project-card p{font-size:14px;color:var(--text-500);margin-bottom:20px;flex-grow:1;}
.project-tools{display:flex;gap:8px;flex-wrap:wrap;}
.project-tools span{
  font-size:12px;color:var(--text-300);background:var(--navy-700);
  padding:5px 10px;border-radius:8px;
}

/* ===== CERTIFICATIONS ===== */
.cert-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;}
.cert-badge{
  background:var(--navy-800);border:1px solid var(--border);border-radius:12px;
  padding:20px;font-size:14px;color:var(--text-300);display:flex;flex-direction:column;gap:8px;
  transition:border-color .25s ease;
}
.cert-badge:hover{border-color:var(--green-500);}
.cert-code{
  font-family:var(--font-head);font-weight:700;color:var(--green-400);font-size:16px;
}

/* ===== CONTACT ===== */
.section-contact{text-align:center;}
.contact-container{display:flex;flex-direction:column;align-items:center;}
.contact-sub{max-width:520px;margin:0 auto 40px;font-size:16px;}
.contact-links{display:flex;flex-direction:column;gap:16px;margin-bottom:40px;}
.contact-link{
  display:flex;align-items:center;gap:12px;justify-content:center;
  font-size:17px;color:var(--text-100);font-weight:500;transition:color .2s ease;
}
.contact-link:hover{color:var(--green-400);}
.contact-icon{width:22px;height:22px;display:inline-flex;color:var(--green-400);flex-shrink:0;}
.contact-icon svg{width:100%;height:100%;}
.social-links{display:flex;gap:16px;}
.social-btn{
  border:1px solid var(--border);padding:12px 26px;border-radius:999px;
  font-weight:600;font-size:14px;color:var(--text-100);transition:all .25s ease;
}
.social-btn:hover{border-color:var(--green-400);color:var(--green-400);transform:translateY(-2px);}

/* ===== FOOTER ===== */
.footer{border-top:1px solid var(--border);padding:28px 0;}
.footer-inner{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--text-500);
}

/* ===== RESPONSIVE ===== */
@media (max-width:900px){
  .about-grid{grid-template-columns:1fr;}
  .skills-grid{grid-template-columns:repeat(2,1fr);}
  .projects-grid{grid-template-columns:repeat(2,1fr);}
}

.mobile-menu{display:none;}

@media (max-width:720px){
  .nav-links{display:none;}
  .nav-toggle{display:flex;}
  .nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .nav-toggle.open span:nth-child(2){opacity:0;}
  .nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  .mobile-menu{
    display:block;
    position:fixed;top:0;left:0;right:0;bottom:0;width:100%;height:100%;
    background:var(--navy-950);z-index:90;
    transform:translateX(100%);transition:transform .3s ease;
    overflow-y:auto;
  }
  .mobile-menu.open{transform:translateX(0);}
  .mobile-menu-links{
    display:flex;flex-direction:column;
    padding:110px 28px 40px;gap:28px;
  }
  .mobile-menu-links a{
    font-size:19px;font-weight:600;color:var(--text-100);
  }
  .mobile-menu-links .nav-cta{
    align-self:flex-start;margin-top:8px;
  }

  .skills-grid{grid-template-columns:1fr;}
  .projects-grid{grid-template-columns:1fr;}
  .hero-stats{gap:28px;}
  .section{padding:80px 0;}
  .footer-inner{flex-direction:column;text-align:center;}
}