/* ===========================
   CSS CUSTOM PROPERTIES — DARK (default)
=========================== */
:root {
  --bg-void: #020408;
  --bg-deep: #060d18;
  --bg-card: rgba(8,18,35,0.7);
  --bg-glass: rgba(13,28,55,0.55);
  --accent-cyan: #00d4ff;
  --accent-blue: #0066ff;
  --accent-purple: #7c3aed;
  --accent-green: #00cc6a;
  --text-primary: #f0f4ff;
  --text-secondary: #8ea6cc;
  --text-muted: #4a6080;
  --glow-cyan: 0 0 40px rgba(0,212,255,0.3),0 0 80px rgba(0,212,255,0.1);
  --border-glass: 1px solid rgba(0,212,255,0.12);
  --nav-bg-scrolled: rgba(2,4,8,0.88);
  --footer-bg: rgba(2,4,8,0.9);
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --radius-card: 20px;
  --transition: all 0.4s cubic-bezier(0.25,0.46,0.45,0.94);
}

/* ===========================
   LIGHT MODE VARIABLES
=========================== */
body.light {
  --bg-void: #f0f4ff;
  --bg-deep: #e4ecfa;
  --bg-card: rgba(255,255,255,0.75);
  --bg-glass: rgba(220,232,255,0.7);
  --accent-cyan: #0099cc;
  --accent-blue: #0055dd;
  --accent-purple: #6d28d9;
  --accent-green: #059652;
  --text-primary: #0a1628;
  --text-secondary: #3a5070;
  --text-muted: #7090b0;
  --glow-cyan: 0 0 30px rgba(0,153,204,0.2),0 0 60px rgba(0,153,204,0.08);
  --border-glass: 1px solid rgba(0,100,200,0.18);
  --nav-bg-scrolled: rgba(240,244,255,0.92);
  --footer-bg: rgba(228,236,250,0.95);
}

/* Light mode: body bg & canvas */
body.light { background: var(--bg-void); }
body.light #bg-canvas { opacity: 0.35; }

/* Light mode: nav */
body.light nav.scrolled { background: var(--nav-bg-scrolled); border-bottom: 1px solid rgba(0,100,200,0.15); }

/* Light mode: hero glow */
body.light .hero-glow { background: radial-gradient(circle,rgba(0,100,220,0.12) 0%,rgba(0,180,255,0.06) 40%,transparent 70%); }

/* Light mode: about section bg */
body.light #about { background: linear-gradient(180deg,transparent,rgba(228,236,250,0.95),rgba(228,236,250,0.95),transparent); }

/* Light mode: project/skills section */
body.light #projects { background: linear-gradient(180deg,transparent,rgba(220,232,255,0.98),rgba(220,232,255,0.98),transparent); }

/* Light mode: card adjustments */
body.light .about-card,
body.light .project-card,
body.light .skill-category,
body.light .cert-card {
  box-shadow: 0 4px 24px rgba(0,60,160,0.08);
}
body.light .about-card:hover,
body.light .project-card:hover,
body.light .skill-category:hover,
body.light .cert-card:hover {
  box-shadow: 0 16px 50px rgba(0,60,160,0.14);
}

/* Light mode: photo ring */
body.light .ring-outer { border-color: rgba(0,100,200,0.25); }
body.light .ring-inner { border-color: rgba(0,100,200,0.15); }
body.light .photo-container { border-color: rgba(0,100,200,0.25); box-shadow: 0 0 50px rgba(0,80,200,0.15),0 30px 80px rgba(0,0,0,0.15); }

/* Light mode: footer */
body.light footer { background: var(--footer-bg); border-top: 1px solid rgba(0,100,200,0.15); }

/* Light mode: about tags */
body.light .about-tag { background: rgba(0,100,200,0.07); border-color: rgba(0,100,200,0.2); }
body.light .about-tag:hover { background: rgba(0,100,200,0.12); }

/* Light mode: tech badges */
body.light .tech-badge { background: rgba(0,100,200,0.07); border-color: rgba(0,100,200,0.18); }

/* Light mode: cert icon */
body.light .cert-icon { background: rgba(109,40,217,0.08); border-color: rgba(109,40,217,0.2); }

/* Light mode: timeline */
body.light .timeline::before { background: linear-gradient(180deg,transparent,var(--accent-blue),var(--accent-cyan),transparent); }
body.light .timeline-item::before { background: var(--accent-blue); box-shadow: 0 0 0 4px rgba(0,100,200,0.15); }
body.light .timeline-year { background: rgba(0,100,200,0.08); border-color: rgba(0,100,200,0.25); }

/* Light mode: section tag line */
body.light .section-tag::before { background: var(--accent-blue); }

/* Light mode: scroll indicator */
body.light .scroll-mouse { border-color: rgba(0,100,200,0.35); }
body.light .scroll-wheel { background: var(--accent-blue); }

/* Light mode: hero badge */
body.light .hero-badge { background: rgba(0,100,200,0.08); border-color: rgba(0,100,200,0.25); color: var(--accent-blue); }
body.light .hero-badge .dot { background: var(--accent-green); }

/* Light mode: cursor */
body.light #cursor { background: var(--accent-blue); }
body.light #cursor-ring { border-color: rgba(0,100,200,0.5); }

/* Light mode: cta glow */
body.light .cta-glow { background: radial-gradient(ellipse at 50% 50%,rgba(0,80,200,0.1) 0%,transparent 70%); }

/* ===========================
   RESET & BASE
=========================== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg-void);color:var(--text-primary);font-family:var(--font-body);font-size:16px;line-height:1.7;overflow-x:hidden;cursor:none}

/* ===========================
   CUSTOM CURSOR
=========================== */
#cursor{position:fixed;top:0;left:0;width:12px;height:12px;background:var(--accent-cyan);border-radius:50%;pointer-events:none;z-index:9999;transform:translate(-50%,-50%);transition:width .3s,height .3s;mix-blend-mode:screen}
#cursor-ring{position:fixed;top:0;left:0;width:40px;height:40px;border:1px solid rgba(0,212,255,0.5);border-radius:50%;pointer-events:none;z-index:9998;transform:translate(-50%,-50%);transition:width .3s,height .3s}
@media(hover:none){#cursor,#cursor-ring{display:none}body{cursor:auto}}

/* ===========================
   CANVAS BG
=========================== */
#bg-canvas{position:fixed;inset:0;z-index:0;pointer-events:none}

/* ===========================
   NAVIGATION
=========================== */
nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:20px 60px;display:flex;justify-content:space-between;align-items:center;transition:var(--transition)}
nav.scrolled{background:rgba(2,4,8,0.88);backdrop-filter:blur(20px);border-bottom:var(--border-glass);padding:14px 60px}
.nav-logo{font-family:var(--font-display);font-weight:800;font-size:1.4rem;letter-spacing:-0.02em;background:linear-gradient(135deg,var(--accent-cyan),var(--accent-blue));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-decoration:none}
.nav-links{display:flex;gap:36px;list-style:none}
.nav-links a{color:var(--text-secondary);text-decoration:none;font-size:0.83rem;font-weight:500;letter-spacing:.05em;text-transform:uppercase;transition:var(--transition);position:relative}
.nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:1px;background:var(--accent-cyan);transition:width .3s}
.nav-links a:hover{color:var(--accent-cyan)}
.nav-links a:hover::after{width:100%}
.nav-cta{background:linear-gradient(135deg,var(--accent-blue),var(--accent-purple));color:white!important;padding:8px 22px;border-radius:100px;font-size:.8rem!important}
.nav-cta::after{display:none!important}
.nav-cta:hover{opacity:.85;transform:translateY(-1px)}
.nav-hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.nav-hamburger span{display:block;width:24px;height:2px;background:var(--text-secondary);border-radius:2px;transition:var(--transition)}

/* ===========================
   THEME TOGGLE
=========================== */
.theme-toggle{position:relative;width:52px;height:28px;background:rgba(0,212,255,0.1);border:1px solid rgba(0,212,255,0.25);border-radius:100px;cursor:pointer;display:flex;align-items:center;padding:3px;transition:var(--transition);flex-shrink:0}
.theme-toggle:hover{border-color:var(--accent-cyan);background:rgba(0,212,255,0.18)}
.theme-toggle-thumb{width:20px;height:20px;background:linear-gradient(135deg,var(--accent-cyan),var(--accent-blue));border-radius:50%;transition:transform 0.35s cubic-bezier(0.34,1.56,0.64,1);display:flex;align-items:center;justify-content:center;font-size:11px;box-shadow:0 2px 8px rgba(0,100,200,0.4)}
.theme-toggle-thumb::after{content:'🌙'}
body.light .theme-toggle{background:rgba(0,100,200,0.1);border-color:rgba(0,100,200,0.3)}
body.light .theme-toggle:hover{background:rgba(0,100,200,0.18);border-color:var(--accent-blue)}
body.light .theme-toggle-thumb{transform:translateX(24px);background:linear-gradient(135deg,#f5c542,#ff8c00);box-shadow:0 2px 8px rgba(255,140,0,0.4)}
body.light .theme-toggle-thumb::after{content:'☀️'}

/* ===========================
   HERO
=========================== */
#hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;overflow:hidden;z-index:1;padding:100px 60px 60px}
.hero-glow{position:absolute;right:15%;top:50%;transform:translateY(-50%);width:600px;height:600px;background:radial-gradient(circle,rgba(0,102,255,0.22) 0%,rgba(0,212,255,0.08) 40%,transparent 70%);border-radius:50%;pointer-events:none;animation:pulseGlow 4s ease-in-out infinite}
@keyframes pulseGlow{0%,100%{opacity:.7;transform:translateY(-50%) scale(1)}50%{opacity:1;transform:translateY(-50%) scale(1.08)}}
.hero-layout{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;max-width:1300px;width:100%;position:relative;z-index:2}
.hero-text{order:1}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(0,212,255,0.08);border:1px solid rgba(0,212,255,0.25);border-radius:100px;padding:6px 16px;font-size:.78rem;color:var(--accent-cyan);font-weight:500;letter-spacing:.05em;margin-bottom:28px;animation:fadeSlideUp .8s ease both}
.hero-badge .dot{width:6px;height:6px;background:var(--accent-green);border-radius:50%;animation:blink 1.5s ease-in-out infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.3}}
.hero-headline{font-family:var(--font-display);font-size:clamp(2.6rem,4.5vw,4rem);font-weight:800;line-height:1.05;letter-spacing:-0.03em;margin-bottom:20px;animation:fadeSlideUp .9s .1s ease both}
.name-highlight{background:linear-gradient(135deg,var(--accent-cyan) 0%,var(--accent-blue) 50%,var(--accent-purple) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-tagline{font-size:1rem;color:var(--text-secondary);max-width:440px;line-height:1.7;margin-bottom:40px;font-weight:300;animation:fadeSlideUp 1s .2s ease both}
.hero-stats{display:flex;gap:36px;margin-bottom:44px;animation:fadeSlideUp 1s .3s ease both}
.stat-item{text-align:left}
.stat-num{font-family:var(--font-display);font-size:2rem;font-weight:800;background:linear-gradient(135deg,var(--accent-cyan),var(--accent-blue));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1}
.stat-label{font-size:.72rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-top:4px}
.hero-ctas{display:flex;gap:16px;flex-wrap:wrap;animation:fadeSlideUp 1s .4s ease both}
.btn-primary{display:inline-flex;align-items:center;gap:10px;background:linear-gradient(135deg,var(--accent-blue),var(--accent-cyan));color:var(--bg-void);font-family:var(--font-display);font-weight:700;font-size:.9rem;padding:14px 28px;border-radius:100px;text-decoration:none;border:none;cursor:pointer;transition:var(--transition);letter-spacing:.02em}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 20px 50px rgba(0,102,255,.4)}
.btn-outline{display:inline-flex;align-items:center;gap:10px;background:transparent;color:var(--text-primary);font-family:var(--font-display);font-weight:600;font-size:.9rem;padding:13px 28px;border-radius:100px;text-decoration:none;border:var(--border-glass);cursor:pointer;transition:var(--transition);backdrop-filter:blur(10px)}
.btn-outline:hover{border-color:var(--accent-cyan);color:var(--accent-cyan);transform:translateY(-3px);box-shadow:var(--glow-cyan)}
.hero-visual{order:2;display:flex;justify-content:center;position:relative}
.hero-image-wrap{position:relative;width:360px;height:440px;animation:fadeSlideUp 1s .2s ease both}
.ring-outer{position:absolute;inset:-30px;border-radius:50%;border:1px solid rgba(0,212,255,0.15);animation:spinRing 20s linear infinite}
.ring-outer::before{content:'';position:absolute;top:-3px;left:50%;width:6px;height:6px;background:var(--accent-cyan);border-radius:50%;box-shadow:var(--glow-cyan);transform:translateX(-50%)}
.ring-inner{position:absolute;inset:-14px;border-radius:50%;border:1px dashed rgba(0,102,255,.2);animation:spinRing 12s linear infinite reverse}
@keyframes spinRing{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}
.photo-container{width:100%;height:100%;border-radius:40px;overflow:hidden;position:relative;border:1px solid rgba(0,212,255,.2);box-shadow:0 0 60px rgba(0,102,255,.2),0 40px 100px rgba(0,0,0,.6)}
.photo-container img{width:100%;height:100%;object-fit:cover;object-position:top center;display:block}
.photo-fallback{width:100%;height:100%;background:linear-gradient(135deg,#0a1628,#0d2347,#1a0a2e);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px}
.photo-fallback .initials{font-family:var(--font-display);font-size:5rem;font-weight:800;background:linear-gradient(135deg,var(--accent-cyan),var(--accent-blue));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1}
.photo-fallback .add-photo-hint{font-size:.75rem;color:var(--text-muted);text-align:center;padding:0 20px}
.photo-container::after{content:'';position:absolute;inset:0;background:linear-gradient(to top,rgba(2,4,8,.5) 0%,transparent 50%);pointer-events:none}
.float-icons{position:absolute;inset:-60px;pointer-events:none}
.float-icon{position:absolute;width:46px;height:46px;background:var(--bg-glass);border:var(--border-glass);border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;backdrop-filter:blur(12px);animation:floatBob var(--dur,4s) ease-in-out infinite;animation-delay:var(--delay,0s);box-shadow:0 8px 30px rgba(0,0,0,.4)}
@keyframes floatBob{0%,100%{transform:translateY(0) rotate(0deg)}50%{transform:translateY(-12px) rotate(3deg)}}
.float-icon:nth-child(1){top:5%;left:-10%;--dur:3.5s;--delay:0s;color:#00d4ff}
.float-icon:nth-child(2){top:20%;right:-12%;--dur:4s;--delay:.5s;color:#7c3aed}
.float-icon:nth-child(3){top:45%;left:-14%;--dur:5s;--delay:1s;color:#00ff88}
.float-icon:nth-child(4){top:65%;right:-8%;--dur:3.8s;--delay:1.5s;color:#ff6b35}
.float-icon:nth-child(5){bottom:10%;left:-5%;--dur:4.5s;--delay:.8s;color:#00d4ff}
.float-icon:nth-child(6){bottom:5%;right:-10%;--dur:3.2s;--delay:.3s;color:#0066ff}
.scroll-indicator{position:absolute;bottom:36px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:8px;z-index:2;animation:fadeIn 1.5s 1s ease both}
.scroll-indicator span{font-size:.7rem;color:var(--text-muted);letter-spacing:.12em;text-transform:uppercase}
.scroll-mouse{width:24px;height:38px;border:1.5px solid rgba(0,212,255,.3);border-radius:12px;display:flex;justify-content:center;padding-top:7px}
.scroll-wheel{width:3px;height:7px;background:var(--accent-cyan);border-radius:2px;animation:scrollWheel 1.8s ease-in-out infinite}
@keyframes scrollWheel{0%{transform:translateY(0);opacity:1}100%{transform:translateY(12px);opacity:0}}

/* ===========================
   SHARED SECTION
=========================== */
section{position:relative;z-index:1}
.section-inner{max-width:1200px;margin:0 auto;padding:100px 60px}
.section-tag{display:inline-flex;align-items:center;gap:8px;font-size:.72rem;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:var(--accent-cyan);margin-bottom:16px}
.section-tag::before{content:'';width:28px;height:1.5px;background:var(--accent-cyan)}
.section-title{font-family:var(--font-display);font-size:clamp(2rem,4vw,3rem);font-weight:800;letter-spacing:-0.03em;line-height:1.1;margin-bottom:16px}
.section-title .accent{background:linear-gradient(135deg,var(--accent-cyan),var(--accent-blue));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.section-subtitle{font-size:1rem;color:var(--text-secondary);max-width:520px;font-weight:300;margin-bottom:60px}
.reveal{opacity:0;transform:translateY(40px);transition:opacity .8s cubic-bezier(.25,.46,.45,.94),transform .8s cubic-bezier(.25,.46,.45,.94)}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-delay-1{transition-delay:.1s}
.reveal-delay-2{transition-delay:.2s}
.reveal-delay-3{transition-delay:.3s}
.reveal-delay-4{transition-delay:.4s}

/* ===========================
   ABOUT
=========================== */
#about{background:linear-gradient(180deg,transparent,rgba(6,13,24,.95),rgba(6,13,24,.95),transparent)}
.about-layout{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.about-description{font-size:1.02rem;color:var(--text-secondary);line-height:1.8;margin-bottom:24px;font-weight:300}
.about-description strong{color:var(--text-primary);font-weight:500}
.about-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.about-tag{padding:7px 16px;background:rgba(0,212,255,.06);border:1px solid rgba(0,212,255,.15);border-radius:100px;font-size:.8rem;color:var(--text-secondary);transition:var(--transition)}
.about-tag:hover{border-color:var(--accent-cyan);color:var(--accent-cyan);background:rgba(0,212,255,.1);transform:translateY(-2px)}
.about-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.about-card{background:var(--bg-card);border:var(--border-glass);border-radius:var(--radius-card);padding:24px;backdrop-filter:blur(20px);transition:var(--transition);cursor:default}
.about-card:hover{border-color:rgba(0,212,255,.3);transform:translateY(-4px);box-shadow:0 20px 60px rgba(0,0,0,.4)}
.about-card-icon{font-size:1.8rem;margin-bottom:12px}
.about-card-title{font-family:var(--font-display);font-size:.9rem;font-weight:700;color:var(--text-primary);margin-bottom:6px}
.about-card-val{font-size:.82rem;color:var(--text-secondary);line-height:1.5}
.about-card.wide{grid-column:span 2}

/* ===========================
   SKILLS
=========================== */
#skills{background:radial-gradient(ellipse at 50% 50%,rgba(0,102,255,.05) 0%,transparent 70%)}
.skills-header{margin-bottom:60px}
.skills-categories{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.skill-category{background:var(--bg-card);border:var(--border-glass);border-radius:var(--radius-card);padding:32px;backdrop-filter:blur(20px);transition:var(--transition);position:relative;overflow:hidden}
.skill-category::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--cat-color,var(--accent-cyan)),transparent);opacity:0;transition:opacity .4s}
.skill-category:hover{transform:translateY(-6px);border-color:rgba(0,212,255,.25);box-shadow:0 30px 80px rgba(0,0,0,.5)}
.skill-category:hover::before{opacity:1}
.skill-cat-header{display:flex;align-items:center;gap:12px;margin-bottom:28px}
.skill-cat-icon{width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;background:rgba(0,212,255,.08);color:var(--cat-color,var(--accent-cyan))}
.skill-cat-title{font-family:var(--font-display);font-size:1rem;font-weight:700;color:var(--text-primary)}
.skill-item{margin-bottom:20px}
.skill-item:last-child{margin-bottom:0}
.skill-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.skill-name{font-size:.85rem;color:var(--text-secondary);display:flex;align-items:center;gap:8px}
.skill-icon{font-size:.9rem}
.skill-pct{font-size:.75rem;color:var(--text-muted);font-family:var(--font-display);font-weight:700}
.skill-bar-bg{height:4px;background:rgba(255,255,255,.05);border-radius:2px;overflow:hidden}
.skill-bar-fill{height:100%;background:linear-gradient(90deg,var(--cat-color,var(--accent-cyan)),rgba(0,212,255,.4));border-radius:2px;width:0;transition:width 1.2s cubic-bezier(.25,.46,.45,.94)}

/* ===========================
   PROJECTS
=========================== */
#projects{background:linear-gradient(180deg,transparent,rgba(6,13,24,.98),rgba(6,13,24,.98),transparent)}
.projects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.project-card.featured{grid-column:span 2}
.project-card{background:var(--bg-card);border:var(--border-glass);border-radius:var(--radius-card);padding:32px;backdrop-filter:blur(20px);transition:var(--transition);position:relative;overflow:hidden;display:flex;flex-direction:column;gap:16px}
.project-card::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(0,102,255,.08),transparent 60%);opacity:0;transition:opacity .4s}
.project-card:hover{transform:translateY(-6px);border-color:rgba(0,212,255,.3);box-shadow:0 30px 80px rgba(0,0,0,.5)}
.project-card:hover::before{opacity:1}
.project-number{font-family:var(--font-display);font-size:.7rem;color:var(--text-muted);letter-spacing:.1em}
.project-title{font-family:var(--font-display);font-size:1.15rem;font-weight:700;color:var(--text-primary);line-height:1.3}
.project-desc{font-size:.87rem;color:var(--text-secondary);line-height:1.7;font-weight:300;flex:1}
.project-tech{display:flex;flex-wrap:wrap;gap:8px}
.tech-badge{padding:4px 12px;background:rgba(0,212,255,.06);border:1px solid rgba(0,212,255,.12);border-radius:100px;font-size:.72rem;color:var(--accent-cyan);font-weight:500}
.project-footer{display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px solid rgba(255,255,255,.05)}
.project-accuracy{font-size:.8rem;color:var(--accent-green);font-weight:600;display:flex;align-items:center;gap:6px}
.project-link{display:inline-flex;align-items:center;gap:6px;font-size:.82rem;color:var(--accent-cyan);text-decoration:none;font-weight:500;transition:var(--transition)}
.project-link:hover{gap:10px}

/* ===========================
   TIMELINE
=========================== */
.timeline{position:relative;padding-left:40px}
.timeline::before{content:'';position:absolute;left:0;top:0;bottom:0;width:1px;background:linear-gradient(180deg,transparent,var(--accent-cyan),var(--accent-blue),transparent)}
.timeline-item{position:relative;margin-bottom:48px}
.timeline-item::before{content:'';position:absolute;left:-44px;top:6px;width:8px;height:8px;background:var(--accent-cyan);border-radius:50%;box-shadow:0 0 0 4px rgba(0,212,255,.15),var(--glow-cyan)}
.timeline-meta{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.timeline-year{font-size:.75rem;font-weight:600;color:var(--accent-cyan);letter-spacing:.05em;background:rgba(0,212,255,.08);padding:3px 10px;border-radius:100px;border:1px solid rgba(0,212,255,.2)}
.timeline-type{font-size:.72rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em}
.timeline-title{font-family:var(--font-display);font-size:1.1rem;font-weight:700;color:var(--text-primary);margin-bottom:4px}
.timeline-org{font-size:.85rem;color:var(--text-secondary);margin-bottom:10px}
.timeline-body{font-size:.87rem;color:var(--text-muted);line-height:1.7}

/* ===========================
   CERTIFICATES
=========================== */
#certificates{background:radial-gradient(ellipse at 30% 50%,rgba(124,58,237,.07) 0%,transparent 60%)}
.certs-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cert-card{background:var(--bg-card);border:var(--border-glass);border-radius:16px;padding:22px;backdrop-filter:blur(12px);transition:var(--transition);display:flex;align-items:flex-start;gap:14px}
.cert-card:hover{border-color:rgba(124,58,237,.35);transform:translateY(-4px);box-shadow:0 20px 50px rgba(0,0,0,.4)}
.cert-icon{flex-shrink:0;width:38px;height:38px;background:rgba(124,58,237,.1);border:1px solid rgba(124,58,237,.2);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1rem;color:#a78bfa}
.cert-title{font-size:.85rem;font-weight:600;color:var(--text-primary);line-height:1.4;margin-bottom:4px}
.cert-org{font-size:.75rem;color:var(--text-muted)}

/* ===========================
   CTA
=========================== */
#cta{text-align:center;overflow:hidden}
.cta-inner{max-width:800px;margin:0 auto;padding:120px 60px;position:relative}
.cta-glow{position:absolute;inset:0;background:radial-gradient(ellipse at 50% 50%,rgba(0,102,255,.2) 0%,transparent 70%);pointer-events:none}
.cta-eyebrow{font-size:.75rem;color:var(--accent-cyan);letter-spacing:.15em;text-transform:uppercase;font-weight:600;margin-bottom:20px}
.cta-headline{font-family:var(--font-display);font-size:clamp(2.5rem,5vw,3.8rem);font-weight:800;letter-spacing:-0.03em;line-height:1.1;margin-bottom:24px}
.gradient-text{background:linear-gradient(135deg,var(--accent-cyan),var(--accent-blue),var(--accent-purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.cta-sub{font-size:1rem;color:var(--text-secondary);font-weight:300;margin-bottom:48px;line-height:1.7}
.cta-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ===========================
   FOOTER
=========================== */
footer{position:relative;z-index:1;border-top:var(--border-glass);background:rgba(2,4,8,.9);backdrop-filter:blur(20px)}
.footer-inner{max-width:1200px;margin:0 auto;padding:40px 60px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px}
.footer-brand{font-family:var(--font-display);font-weight:800;font-size:1.1rem;background:linear-gradient(135deg,var(--accent-cyan),var(--accent-blue));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.footer-contact{display:flex;gap:28px;align-items:center}
.footer-contact a{color:var(--text-secondary);text-decoration:none;font-size:.85rem;display:flex;align-items:center;gap:7px;transition:var(--transition)}
.footer-contact a:hover{color:var(--accent-cyan)}
.footer-social{display:flex;gap:14px}
.social-btn{width:38px;height:38px;border:var(--border-glass);border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);text-decoration:none;font-size:.9rem;transition:var(--transition);background:var(--bg-card);backdrop-filter:blur(10px)}
.social-btn:hover{color:var(--accent-cyan);border-color:rgba(0,212,255,.4);transform:translateY(-3px);box-shadow:var(--glow-cyan)}
.footer-copy{font-size:.75rem;color:var(--text-muted);width:100%;text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,.04)}

/* ===========================
   KEYFRAMES
=========================== */
@keyframes fadeSlideUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

/* ===========================
   RESPONSIVE
=========================== */
@media(max-width:1024px){
  .hero-layout{grid-template-columns:1fr;gap:60px}
  .hero-visual{order:-1}
  .hero-image-wrap{width:260px;height:320px}
  .hero-text{text-align:center}
  .hero-stats{justify-content:center}
  .hero-ctas{justify-content:center}
  .hero-tagline{max-width:100%}
  .about-layout{grid-template-columns:1fr}
  .skills-categories{grid-template-columns:repeat(2,1fr)}
  .projects-grid{grid-template-columns:1fr}
  .project-card.featured{grid-column:span 1}
  .certs-grid{grid-template-columns:repeat(2,1fr)}
  nav{padding:16px 30px}
  nav.scrolled{padding:12px 30px}
  .section-inner{padding:80px 30px}
  #hero{padding:100px 30px 60px}
}
@media(max-width:768px){
  .nav-links{display:none;position:fixed;top:70px;left:0;right:0;background:rgba(2,4,8,.95);backdrop-filter:blur(20px);flex-direction:column;gap:0;border-bottom:var(--border-glass);padding:20px 0}
  body.light .nav-links{background:rgba(240,244,255,0.97)}
  .nav-links.open{display:flex}
  .nav-links li{width:100%}
  .nav-links a{display:block;padding:14px 30px;font-size:.9rem;border-bottom:1px solid rgba(255,255,255,.04)}
  body.light .nav-links a{border-bottom:1px solid rgba(0,0,0,.05)}
  .nav-hamburger{display:flex}
  .hero-glow{display:none}
}
@media(max-width:640px){
  .skills-categories{grid-template-columns:1fr}
  .certs-grid{grid-template-columns:1fr}
  .about-cards{grid-template-columns:1fr}
  .about-card.wide{grid-column:span 1}
  .footer-inner{flex-direction:column;text-align:center}
  .footer-contact{flex-direction:column;gap:12px}
  .cta-inner{padding:80px 24px}
  .section-inner{padding:60px 24px}
  .hero-stats{gap:20px}
}