/* ============ VARIABLES ============ */
:root{
  --bg: #070a12;
  --bg-alt: #0c1120;
  --surface: rgba(255,255,255,0.04);
  --surface-strong: rgba(255,255,255,0.07);
  --border: rgba(255,255,255,0.09);
  --text: #e7ecf7;
  --text-dim: #93a0bd;
  --cyan: #22d3ee;
  --purple: #a855f7;
  --green: #34d399;
  --gradient: linear-gradient(135deg, var(--cyan), var(--purple));
  --shadow-glow: 0 0 40px rgba(34,211,238,0.15);
  --radius: 18px;
  --transition: 0.35s cubic-bezier(.4,0,.2,1);
}

*{ margin:0; padding:0; box-sizing:border-box; }

html{ scroll-behavior:smooth; }

body{
  background: var(--bg);
  color: var(--text);
  font-family:'Inter', sans-serif;
  overflow-x:hidden;
  line-height:1.6;
}

h1,h2,h3,.brand{ font-family:'Space Grotesk', sans-serif; }

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

.container{
  width:min(1180px, 92%);
  margin-inline:auto;
}

::selection{ background: var(--purple); color:#fff; }

/* scrollbar */
::-webkit-scrollbar{ width:10px; }
::-webkit-scrollbar-track{ background: var(--bg); }
::-webkit-scrollbar-thumb{ background: linear-gradient(var(--cyan), var(--purple)); border-radius:10px; }

/* ============ PRELOADER ============ */
.preloader{
  position:fixed; inset:0; background:var(--bg);
  display:flex; align-items:center; justify-content:center;
  z-index:9999; transition: opacity .5s ease, visibility .5s ease;
}
.preloader.hide{ opacity:0; visibility:hidden; }
.preloader-ring{
  width:56px; height:56px; border-radius:50%;
  border:3px solid rgba(255,255,255,0.1);
  border-top-color: var(--cyan);
  border-right-color: var(--purple);
  animation: spin 0.9s linear infinite;
}
@keyframes spin{ to{ transform:rotate(360deg); } }

/* ============ SCROLL PROGRESS ============ */
.scroll-progress{
  position:fixed; top:0; left:0; height:3px;
  background: var(--gradient);
  width:0%; z-index:1001;
  box-shadow:0 0 10px var(--cyan);
}

/* ============ NAVBAR ============ */
.navbar{
  position:fixed; top:0; left:0; right:0; z-index:900;
  padding:18px 0; transition: var(--transition);
}
.navbar.scrolled{
  padding:12px 0;
  background: rgba(7,10,18,0.75);
  backdrop-filter: blur(16px);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  width:min(1180px, 92%); margin-inline:auto;
  display:flex; align-items:center; justify-content:space-between; gap:24px;
}
.brand{ font-weight:700; font-size:1.25rem; letter-spacing:0.5px; white-space:nowrap; }
.brand .bracket{ color: var(--text-dim); }
.brand .accent{ background: var(--gradient); -webkit-background-clip:text; background-clip:text; color:transparent; }

.nav-links{ display:flex; gap:28px; }
.nav-link{
  font-size:0.92rem; color: var(--text-dim); position:relative; padding:4px 0;
  transition: color var(--transition);
}
.nav-link::after{
  content:''; position:absolute; left:0; bottom:-2px; width:0; height:2px;
  background: var(--gradient); transition: width var(--transition);
}
.nav-link:hover, .nav-link.active-link{ color: var(--text); }
.nav-link:hover::after, .nav-link.active-link::after{ width:100%; }

.nav-cta{ white-space:nowrap; }
.menu-toggle{
  display:none; background:none; border:none; color:var(--text); font-size:1.7rem; cursor:pointer;
}

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:12px 26px; border-radius:50px; font-weight:600; font-size:0.92rem;
  transition: var(--transition); cursor:pointer; border:1px solid transparent;
}
.btn-primary{
  background: var(--gradient); color:#04121a;
  box-shadow: 0 8px 24px rgba(34,211,238,0.25);
}
.btn-primary:hover{ transform: translateY(-3px); box-shadow: 0 12px 30px rgba(168,85,247,0.35); }
.btn-ghost{ border-color: var(--border); color:var(--text); }
.btn-ghost:hover{ border-color: var(--cyan); color:var(--cyan); transform: translateY(-3px); }
.btn-outline{ border:1px solid var(--border); padding:9px 20px; font-size:0.85rem; }
.btn-outline:hover{ border-color:var(--cyan); color:var(--cyan); }

/* ============ MOBILE MENU ============ */
.mobile-menu{
  position:fixed; inset:0; z-index:1000;
  background: linear-gradient(160deg, #0a0f1e, #070a12 60%);
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:40px;
  transform: translateY(-100%); transition: transform .5s cubic-bezier(.65,0,.35,1);
}
.mobile-menu.open{ transform: translateY(0); }
.menu-close{
  position:absolute; top:26px; right:26px;
  background: var(--surface); border:1px solid var(--border); color:var(--text);
  width:46px; height:46px; border-radius:50%; font-size:1.6rem; cursor:pointer;
  display:flex; align-items:center; justify-content:center;
  transition: var(--transition);
}
.menu-close:hover{ background: var(--gradient); color:#04121a; transform: rotate(90deg); }
.mobile-nav{ display:flex; flex-direction:column; align-items:center; gap:22px; }
.mobile-nav a{ font-size:1.6rem; font-weight:600; font-family:'Space Grotesk', sans-serif; color:var(--text-dim); transition: color var(--transition); }
.mobile-nav a:hover{ color:var(--text); background: var(--gradient); -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent; }
.mobile-socials{ display:flex; gap:26px; font-size:1.6rem; }
.mobile-socials a{ color:var(--text-dim); transition: var(--transition); }
.mobile-socials a:hover{ color: var(--cyan); transform: translateY(-4px); }

/* ============ HERO ============ */
.hero{
  position:relative; min-height:100vh; display:flex; align-items:center;
  overflow:hidden; padding-top:90px;
}
#netCanvas{ position:absolute; inset:0; z-index:0; opacity:0.6; }
.hero-glow{
  position:absolute; border-radius:50%; filter:blur(90px); z-index:0; pointer-events:none;
}
.glow-1{ width:420px; height:420px; background:var(--cyan); opacity:0.15; top:-100px; right:-100px; }
.glow-2{ width:420px; height:420px; background:var(--purple); opacity:0.15; bottom:-120px; left:-100px; }

.hero-content{ position:relative; z-index:1; max-width:820px; }
.hero-overline{ color:var(--cyan); font-weight:600; letter-spacing:2px; text-transform:uppercase; font-size:0.85rem; margin-bottom:14px; }
.hero-name{ font-size:clamp(2.2rem, 6vw, 3.8rem); font-weight:700; line-height:1.1; margin-bottom:14px; }
.hero-role{ font-size:clamp(1.1rem, 3vw, 1.6rem); font-weight:600; margin-bottom:20px;
  background: var(--gradient); -webkit-background-clip:text; background-clip:text; color:transparent; min-height:2.2rem; }
.cursor-blink{ animation: blink 0.9s steps(1) infinite; color:var(--cyan); -webkit-text-fill-color:var(--cyan); }
@keyframes blink{ 50%{ opacity:0; } }
.hero-tagline{ color:var(--text-dim); font-size:1.05rem; max-width:600px; margin-bottom:34px; }
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; margin-bottom:36px; }
.hero-socials{ display:flex; gap:18px; font-size:1.4rem; }
.hero-socials a{ color:var(--text-dim); transition: var(--transition); }
.hero-socials a:hover{ color:var(--cyan); transform: translateY(-4px); }

.scroll-cue{
  position:absolute; bottom:28px; left:50%; transform:translateX(-50%);
  font-size:1.8rem; color:var(--text-dim); animation: bounce 2s infinite; z-index:1;
}
@keyframes bounce{ 0%,100%{ transform:translate(-50%,0);} 50%{ transform:translate(-50%,10px);} }

/* ============ REVEAL ANIMATIONS ============ */
.reveal-up, .reveal-left, .reveal-right{
  opacity:0; transition: opacity .8s ease var(--d,0s), transform .8s cubic-bezier(.2,.7,.3,1) var(--d,0s);
}
.reveal-up{ transform: translateY(36px); }
.reveal-left{ transform: translateX(-50px); }
.reveal-right{ transform: translateX(50px); }
.reveal-up.in-view, .reveal-left.in-view, .reveal-right.in-view{ opacity:1; transform: translate(0,0); }

/* ============ SECTIONS ============ */
.section{ padding:120px 0; position:relative; }
.section-alt{ background: var(--bg-alt); }
.section-tag{ color:var(--cyan); font-weight:600; letter-spacing:2px; text-transform:uppercase; font-size:0.8rem; margin-bottom:10px; text-align:center; }
.section-title{ font-size:clamp(1.8rem,4vw,2.6rem); font-weight:700; text-align:center; margin-bottom:64px; }

/* ============ ABOUT ============ */
.about-grid{ display:grid; grid-template-columns: 0.8fr 1.2fr; gap:60px; align-items:center; }
.about-photo-wrap{ position:relative; justify-self:center; }
.photo-ring{
  position:absolute; inset:-18px; border-radius:28px; background: var(--gradient);
  opacity:0.5; filter:blur(20px); animation: pulse 4s ease-in-out infinite;
}
@keyframes pulse{ 0%,100%{ opacity:0.35;} 50%{ opacity:0.6;} }
.about-photo{
  position:relative; width:320px; height:380px; object-fit:cover; border-radius:24px;
  border:1px solid var(--border); box-shadow: var(--shadow-glow);
}
.badge-chip{
  position:absolute; bottom:-18px; left:50%; transform:translateX(-50%);
  background: var(--surface-strong); backdrop-filter: blur(10px);
  border:1px solid var(--border); padding:10px 20px; border-radius:50px;
  font-size:0.85rem; white-space:nowrap; font-weight:600;
}
.about-text p{ color:var(--text-dim); margin-bottom:16px; }
.about-text strong{ color:var(--text); }

.about-stats{ display:grid; grid-template-columns: repeat(4,1fr); gap:14px; margin:32px 0; }
.stat-box{
  background: var(--surface); border:1px solid var(--border); border-radius:14px;
  padding:18px 8px; text-align:center; transition: var(--transition);
}
.stat-box:hover{ border-color: var(--cyan); transform: translateY(-4px); }
.stat-num{ display:block; font-size:1.7rem; font-weight:700; font-family:'Space Grotesk',sans-serif;
  background: var(--gradient); -webkit-background-clip:text; background-clip:text; color:transparent; }
.stat-label{ font-size:0.75rem; color:var(--text-dim); }

.about-info-grid{ display:grid; grid-template-columns: 1fr 1fr; gap:12px; }
.about-info-grid div{ display:flex; align-items:center; gap:8px; color:var(--text-dim); font-size:0.9rem; }
.about-info-grid i{ color:var(--cyan); font-size:1.1rem; }

/* ============ SKILLS ============ */
.skills-grid{ display:grid; grid-template-columns: repeat(auto-fit, minmax(280px,1fr)); gap:24px; }
.skill-card{
  background: var(--surface); border:1px solid var(--border); border-radius:var(--radius);
  padding:30px; transition: var(--transition);
}
.skill-card:hover{ transform: translateY(-6px); border-color: var(--cyan); box-shadow: var(--shadow-glow); }
.skill-icon{
  width:52px; height:52px; border-radius:14px; background: var(--gradient);
  display:flex; align-items:center; justify-content:center; font-size:1.5rem; color:#04121a; margin-bottom:16px;
}
.skill-card h3{ margin-bottom:14px; font-size:1.1rem; }
.chip-row{ display:flex; flex-wrap:wrap; gap:8px; }
.chip{
  background: var(--surface-strong); border:1px solid var(--border); color:var(--text-dim);
  padding:6px 14px; border-radius:50px; font-size:0.78rem; transition: var(--transition);
}
.chip:hover{ color:var(--text); border-color:var(--purple); transform: translateY(-2px); }

/* ============ TIMELINE ============ */
.timeline{ position:relative; max-width:800px; margin-inline:auto; padding-left:32px; }
.timeline::before{
  content:''; position:absolute; left:16px; top:0; bottom:0; width:2px;
  background: linear-gradient(var(--cyan), var(--purple));
  opacity:0.3;
}
.timeline-item{ position:relative; padding-bottom:44px; padding-left:34px; }
.timeline-item:last-child{ padding-bottom:0; }
.timeline-dot{
  position:absolute; left:-32px; top:0; width:36px; height:36px; border-radius:50%;
  background: var(--bg); border:2px solid var(--cyan); display:flex; align-items:center; justify-content:center;
  color: var(--cyan); font-size:1.1rem; z-index:1;
}
.timeline-card{
  background: var(--surface); border:1px solid var(--border); border-radius:var(--radius);
  padding:24px 28px; transition: var(--transition);
}
.timeline-card:hover{ border-color:var(--purple); transform: translateX(6px); }
.timeline-date{ font-size:0.78rem; color:var(--cyan); font-weight:600; letter-spacing:1px; text-transform:uppercase; }
.timeline-card h3{ margin:8px 0 4px; font-size:1.15rem; }
.timeline-org{ color:var(--text-dim); font-size:0.9rem; margin-bottom:12px; }
.timeline-card ul{ display:flex; flex-direction:column; gap:6px; }
.timeline-card li{ color:var(--text-dim); font-size:0.9rem; padding-left:18px; position:relative; }
.timeline-card li::before{ content:'▹'; position:absolute; left:0; color:var(--cyan); }

/* ============ PROJECTS ============ */
.projects-grid{ display:grid; grid-template-columns: repeat(auto-fit, minmax(280px,1fr)); gap:26px; }
.project-card{
  position:relative; background: var(--surface); border:1px solid var(--border);
  border-radius:var(--radius); padding:30px; overflow:hidden; transition: var(--transition);
}
.project-card:hover{ transform: translateY(-8px); border-color:var(--cyan); box-shadow: var(--shadow-glow); }
.project-glow{
  position:absolute; width:180px; height:180px; background: var(--purple); opacity:0.15;
  filter:blur(60px); top:-60px; right:-60px; pointer-events:none;
}
.project-icon{
  width:52px; height:52px; border-radius:14px; background: var(--surface-strong);
  border:1px solid var(--border); display:flex; align-items:center; justify-content:center;
  font-size:1.5rem; color:var(--cyan); margin-bottom:18px;
}
.project-card h3{ font-size:1.2rem; margin-bottom:4px; }
.project-sub{ color:var(--text-dim); font-size:0.85rem; margin-bottom:14px; }
.project-card .chip-row{ margin-bottom:16px; }
.project-card ul{ display:flex; flex-direction:column; gap:8px; margin-bottom:20px; }
.project-card li{ color:var(--text-dim); font-size:0.88rem; padding-left:18px; position:relative; }
.project-card li::before{ content:'▹'; position:absolute; left:0; color:var(--purple); }
.project-link{ display:inline-flex; align-items:center; gap:8px; font-weight:600; font-size:0.9rem; color:var(--cyan); }
.project-link:hover{ gap:12px; }

/* ============ CERTIFICATIONS ============ */
.certs-grid{ display:grid; grid-template-columns: repeat(auto-fit, minmax(260px,1fr)); gap:18px; }
.cert-card{
  display:flex; align-items:center; gap:14px; background: var(--surface); border:1px solid var(--border);
  border-radius:14px; padding:18px 20px; transition: var(--transition);
}
.cert-card:hover{ border-color:var(--green); transform: translateY(-4px); }
.cert-card i{ font-size:1.6rem; color:var(--green); flex-shrink:0; }
.cert-card span{ font-size:0.92rem; color:var(--text-dim); }
.cert-card em{ color: var(--purple); font-style:normal; }

/* ============ CONTACT ============ */
.contact-intro{ text-align:center; color:var(--text-dim); max-width:560px; margin:-40px auto 50px; }
.contact-grid{ display:grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap:22px; }
.contact-card{
  background: var(--surface); border:1px solid var(--border); border-radius:var(--radius);
  padding:32px 20px; text-align:center; transition: var(--transition);
}
.contact-card:hover{ transform: translateY(-8px); border-color:var(--cyan); box-shadow: var(--shadow-glow); }
.contact-card i{ font-size:2rem; color:var(--cyan); margin-bottom:14px; }
.contact-card h3{ font-size:1rem; margin-bottom:6px; }
.contact-card span{ color:var(--text-dim); font-size:0.85rem; word-break:break-word; }

/* ============ FOOTER ============ */
.footer{ text-align:center; padding:30px 0; border-top:1px solid var(--border); color:var(--text-dim); font-size:0.85rem; }
.footer i{ color:var(--purple); }

/* ============ BACK TO TOP ============ */
.back-to-top{
  position:fixed; bottom:28px; right:28px; width:48px; height:48px; border-radius:50%;
  background: var(--gradient); color:#04121a; border:none; font-size:1.3rem; cursor:pointer;
  display:flex; align-items:center; justify-content:center; z-index:500;
  opacity:0; visibility:hidden; transform: translateY(20px);
  transition: var(--transition); box-shadow: 0 8px 24px rgba(34,211,238,0.3);
}
.back-to-top.show{ opacity:1; visibility:visible; transform: translateY(0); }
.back-to-top:hover{ transform: translateY(-4px) scale(1.05); }

/* ============ RESPONSIVE ============ */
@media (max-width: 900px){
  .nav-links, .nav-cta{ display:none; }
  .menu-toggle{ display:block; }
  .about-grid{ grid-template-columns: 1fr; }
  .about-info-grid{ grid-template-columns: 1fr; }
}

@media (max-width: 600px){
  .section{ padding:80px 0; }
  .about-stats{ grid-template-columns: repeat(2,1fr); }
  .about-photo{ width:100%; max-width:280px; height:320px; }
  .hero-actions{ flex-direction:column; align-items:flex-start; }
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.01ms !important; animation-iteration-count:1 !important; transition-duration:0.01ms !important; scroll-behavior:auto !important; }
}