/* Yan Rooven Andrew Portfolio — style.css */
/* ===== Base & Reset ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --accent:#00d4ff;
  --accent2:#7b2ff7;
  --accent3:#0fb9b1;
  --bg-primary:#0a0a1a;
  --bg-secondary:#12122a;
  --bg-card:rgba(255,255,255,0.06);
  --bg-card-hover:rgba(255,255,255,0.10);
  --border-card:rgba(255,255,255,0.12);
  --text-primary:#e8e8f0;
  --text-secondary:#a0a0b8;
  --text-muted:#6a6a80;
  --gradient-main:linear-gradient(135deg,#0a0a1a 0%,#1a1040 30%,#0d1a30 60%,#0a0a1a 100%);
  --gradient-accent:linear-gradient(135deg,#00d4ff,#7b2ff7);
  --gradient-hero:linear-gradient(135deg,rgba(0,212,255,0.15),rgba(123,47,247,0.15));
  --glass-blur:20px;
  --radius:16px;
  --radius-sm:8px;
  --transition:0.3s cubic-bezier(0.4,0,0.2,1);
  --font-main:'Inter',system-ui,-apple-system,sans-serif;
  --font-display:'Space Grotesk','Inter',sans-serif;
  /* Responsive spacing scale */
  --space-xs:clamp(4px,0.5vw,8px);
  --space-sm:clamp(8px,1vw,16px);
  --space-md:clamp(16px,2vw,28px);
  --space-lg:clamp(24px,3vw,40px);
  --space-xl:clamp(32px,4vw,60px);
  --space-section:clamp(48px,6vw,80px);
  /* Responsive font scale */
  --fs-xs:clamp(0.7rem,0.65rem+0.25vw,0.8rem);
  --fs-sm:clamp(0.8rem,0.75rem+0.25vw,0.9rem);
  --fs-base:clamp(0.9rem,0.85rem+0.25vw,1rem);
  --fs-md:clamp(1rem,0.9rem+0.5vw,1.15rem);
  --fs-lg:clamp(1.2rem,1rem+0.5vw,1.5rem);
  --fs-xl:clamp(1.5rem,1.2rem+0.8vw,2rem);
  --fs-hero:clamp(2rem,1.5rem+2.5vw,4.5rem);
  --fs-section:clamp(1.5rem,1.2rem+0.8vw,2.5rem);
  /* Touch target */
  --touch-min:44px;
}
html{scroll-behavior:smooth;font-size:16px;scroll-padding-top:80px}
body{
  font-family:var(--font-main);
  background:var(--bg-primary);
  color:var(--text-primary);
  line-height:1.7;
  overflow-x:hidden;
  background:var(--gradient-main);
  min-height:100vh;
}
a{color:var(--accent);text-decoration:none;transition:color var(--transition)}
a:hover{color:#fff}
strong{color:var(--accent)}
::selection{background:var(--accent);color:#000}

#particles{position:fixed;top:0;left:0;width:100%;height:100%;z-index:0;pointer-events:none}

.glass-card{
  background:var(--bg-card);
  border:1px solid var(--border-card);
  border-radius:var(--radius);
  backdrop-filter:blur(var(--glass-blur));
  -webkit-backdrop-filter:blur(var(--glass-blur));
  padding:clamp(16px,2vw,28px);
  transition:transform var(--transition),background var(--transition),box-shadow var(--transition);
}
.glass-card:hover{
  background:var(--bg-card-hover);
  transform:translateY(-4px);
  box-shadow:0 8px 32px rgba(0,212,255,0.12),0 2px 8px rgba(123,47,247,0.08);
}

/* ===== Navigation ===== */
#navbar{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:16px clamp(16px,3vw,40px);
  background:rgba(10,10,26,0.85);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,0.06);
  transition:padding var(--transition),background var(--transition);
}
#navbar.scrolled{padding:10px clamp(16px,3vw,40px);background:rgba(10,10,26,0.95)}
.nav-logo{font-family:var(--font-display);font-weight:700;font-size:1.3rem;color:var(--accent)}
.logo-bracket{color:var(--accent2);opacity:0.7}
.nav-links{display:flex;list-style:none;gap:8px}
.nav-link{
  padding:8px 16px;font-size:0.85rem;font-weight:500;color:var(--text-secondary);
  border-radius:var(--radius-sm);transition:all var(--transition);
  min-height:var(--touch-min);
  display:flex;align-items:center;
}
.nav-link:hover,.nav-link.active{color:var(--accent);background:rgba(0,212,255,0.08)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;min-width:var(--touch-min);min-height:var(--touch-min);align-items:center;justify-content:center;z-index:101}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--text-primary);transition:var(--transition);border-radius:2px}

/* ===== Hero ===== */
#hero{
  position:relative;z-index:1;
  min-height:100vh;display:flex;align-items:center;justify-content:center;gap:var(--space-xl);
  padding:clamp(80px,10vw,120px) var(--space-lg) clamp(48px,6vw,80px);
  background:var(--gradient-hero);
}
.hero-content{flex:1;max-width:650px}
.hero-visual{flex:1;max-width:450px}

.hero-badge{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 20px;font-size:var(--fs-sm);font-weight:500;
  background:rgba(0,212,255,0.1);border:1px solid rgba(0,212,255,0.25);
  border-radius:50px;color:var(--accent);margin-bottom:var(--space-sm);
}
.badge-pulse{
  width:10px;height:10px;border-radius:50%;background:var(--accent);
  animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:0.5;transform:scale(0.8)}}

.hero-name{font-family:var(--font-display);font-size:var(--fs-hero);font-weight:800;line-height:1.1;margin-bottom:var(--space-sm)}
.name-line{display:block;opacity:0;animation:slideIn 0.8s ease forwards}
.name-line:nth-child(1){animation-delay:0.2s}
.name-line:nth-child(2){animation-delay:0.4s}
.name-line:nth-child(3){animation-delay:0.6s}
.name-line.accent{color:var(--accent);text-shadow:0 0 30px rgba(0,212,255,0.3)}
@keyframes slideIn{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}

.hero-title{display:flex;align-items:center;gap:16px;font-size:var(--fs-md);color:var(--text-secondary);margin-bottom:var(--space-xs);flex-wrap:wrap}
.title-separator{color:var(--accent2);font-weight:300}
.hero-location{font-size:var(--fs-base);color:var(--text-muted);margin-bottom:var(--space-md)}

.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:var(--space-lg)}

.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:clamp(12px,1.5vw,14px) clamp(20px,2vw,28px);
  font-size:var(--fs-base);font-weight:600;font-family:var(--font-main);
  border-radius:var(--radius-sm);border:none;cursor:pointer;
  transition:all var(--transition);position:relative;overflow:hidden;
  min-height:var(--touch-min);
}
.btn-primary{
  background:var(--gradient-accent);color:#fff;
  box-shadow:0 4px 16px rgba(0,212,255,0.25);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(0,212,255,0.35)}
.btn-secondary{
  background:var(--bg-card);color:var(--accent);
  border:1px solid rgba(0,212,255,0.3);
}
.btn-secondary:hover{background:rgba(0,212,255,0.1);transform:translateY(-2px)}

.hero-stats{display:flex;gap:var(--space-lg)}
.stat{text-align:center}
.stat-number{font-family:var(--font-display);font-size:clamp(1.4rem,1.2rem+0.5vw,1.8rem);font-weight:700;color:var(--accent);display:block}
.stat-label{font-size:var(--fs-xs);color:var(--text-muted)}

.code-window{
  background:rgba(10,10,26,0.8);border:1px solid rgba(255,255,255,0.1);
  border-radius:var(--radius);overflow:hidden;
  box-shadow:0 8px 32px rgba(0,0,0,0.4),0 0 60px rgba(0,212,255,0.06);
  animation:float 6s ease-in-out infinite;
  max-width:100%;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.code-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 16px;background:rgba(255,255,255,0.04);border-bottom:1px solid rgba(255,255,255,0.06);
}
.code-dots{display:flex;gap:6px}
.dot{width:12px;height:12px;border-radius:50%}
.dot.red{background:#ff5f57}.dot.yellow{background:#ffbd2e}.dot.green{background:#28c840}
.code-title{font-size:0.75rem;color:var(--text-muted)}
.code-body{padding:clamp(12px,1.5vw,20px) clamp(14px,2vw,24px)}
.code-body pre{font-family:'JetBrains Mono',monospace;font-size:clamp(0.7rem,0.65rem+0.2vw,0.85rem);line-height:1.8;color:var(--text-secondary);white-space:pre-wrap;word-break:break-word}
.code-keyword{color:#c678dd}.code-var{color:#e06c75}.code-prop{color:#61afef}.code-string{color:#98c379}

/* ===== Sections ===== */
.section-container{max-width:1100px;margin:0 auto;padding:var(--space-section) var(--space-lg)}
section{position:relative;z-index:1}
.section-header{text-align:center;margin-bottom:clamp(32px,4vw,48px)}
.section-tag{
  font-size:var(--fs-xs);font-weight:600;letter-spacing:3px;text-transform:uppercase;
  color:var(--accent);background:rgba(0,212,255,0.1);
  padding:6px 16px;border-radius:50px;display:inline-block;margin-bottom:var(--space-sm);
}
.section-title{font-family:var(--font-display);font-size:var(--fs-section);font-weight:700;margin-bottom:8px}
.section-line{width:60px;height:3px;background:var(--gradient-accent);margin:16px auto 0;border-radius:2px}

/* ===== About ===== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-md)}
.about-intro{font-size:var(--fs-md);margin-bottom:var(--space-sm)}
.about-highlights{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-xs);margin-top:var(--space-md)}
.highlight{display:flex;align-items:center;gap:10px;padding:10px 14px;background:rgba(0,212,255,0.06);border-radius:var(--radius-sm);min-height:var(--touch-min)}
.highlight-icon{font-size:1.2rem}
.about-details{display:flex;flex-direction:column;gap:var(--space-sm)}
.detail-item{display:flex;justify-content:space-between;padding:var(--space-xs) 0;border-bottom:1px solid rgba(255,255,255,0.06);min-height:36px;align-items:center}
.detail-label{font-size:var(--fs-sm);color:var(--text-muted);font-weight:500}
.detail-value{font-size:var(--fs-base);font-weight:500}
.detail-value.accent{color:var(--accent)}

/* ===== Skills ===== */
.skills-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-md)}
.skill-category-header{display:flex;align-items:center;gap:10px;margin-bottom:var(--space-sm)}
.skill-icon{font-size:1.5rem}
.skill-category-header h3{font-size:var(--fs-lg);font-weight:600}
.skill-tags{display:flex;flex-wrap:wrap;gap:8px}
.skill-tag{
  padding:6px 14px;font-size:var(--fs-sm);font-weight:500;
  background:rgba(0,212,255,0.08);border:1px solid rgba(0,212,255,0.2);
  border-radius:50px;color:var(--text-primary);
  transition:all var(--transition);position:relative;
  min-height:var(--touch-min);
  display:inline-flex;align-items:center;
}
.skill-tag:hover{
  background:rgba(0,212,255,0.15);border-color:var(--accent);color:var(--accent);
  transform:translateY(-2px);
}

/* ===== Projects ===== */
.projects-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-md)}
.project-card{overflow:hidden;cursor:pointer}
.project-card[data-featured="true"]{grid-column:span 1}
.project-image{position:relative;overflow:hidden;border-radius:12px;margin:clamp(-16px,-2vw,-28px) clamp(-16px,-2vw,-28px) var(--space-sm);height:clamp(120px,15vw,180px)}
.project-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center}
.project-emoji{font-size:clamp(2rem,3vw,3rem);opacity:0.8}
.project-overlay{
  position:absolute;top:0;left:0;right:0;bottom:0;
  background:rgba(0,0,0,0.3);display:flex;align-items:center;justify-content:center;
  opacity:0;transition:opacity var(--transition);
}
.project-card:hover .project-overlay{opacity:1}
.project-category{font-size:0.8rem;font-weight:600;padding:6px 16px;background:rgba(0,212,255,0.2);border-radius:50px;color:#fff}
.project-info h3{font-size:var(--fs-lg);font-weight:700;margin-bottom:8px}
.project-info p{font-size:var(--fs-base);color:var(--text-secondary);margin-bottom:14px}
.project-tech{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:var(--space-sm)}
.project-tech span{
  font-size:var(--fs-xs);padding:3px 10px;background:rgba(123,47,247,0.15);
  border:1px solid rgba(123,47,247,0.25);border-radius:50px;color:var(--accent2);
}
.project-links{display:flex;gap:8px}
.project-link{
  display:flex;align-items:center;justify-content:center;
  width:var(--touch-min);height:var(--touch-min);background:rgba(255,255,255,0.06);border-radius:var(--radius-sm);
  color:var(--text-secondary);transition:all var(--transition);
}
.project-link:hover{background:var(--accent);color:#000}

/* ===== Education Timeline ===== */
.education-timeline{display:flex;flex-direction:column;gap:var(--space-md);position:relative}
.timeline-item{display:flex;align-items:flex-start;gap:var(--space-md);position:relative;flex-wrap:wrap}
.timeline-icon{font-size:2rem;flex-shrink:0;width:60px;height:60px;display:flex;align-items:center;justify-content:center;background:rgba(0,212,255,0.1);border-radius:var(--radius-sm)}
.timeline-content{flex:1;min-width:0}
.timeline-content h3{font-size:var(--fs-lg);font-weight:700;margin-bottom:4px}
.timeline-content h4{font-size:var(--fs-base);color:var(--accent);font-weight:500;margin-bottom:8px}
.timeline-content p{font-size:var(--fs-base);color:var(--text-secondary)}
.timeline-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:var(--space-sm)}
.timeline-tag{font-size:var(--fs-xs);padding:3px 10px;background:rgba(0,212,255,0.08);border:1px solid rgba(0,212,255,0.2);border-radius:50px;color:var(--accent)}
.timeline-date{font-size:var(--fs-sm);color:var(--text-muted);font-weight:500;flex-shrink:0;white-space:nowrap}
.timeline-item.current{border:1px solid rgba(0,212,255,0.3)}
.timeline-item.current .timeline-icon{background:rgba(0,212,255,0.2)}

/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-md)}
.contact-info{display:flex;flex-direction:column;gap:var(--space-sm)}
.contact-item{display:flex;align-items:center;gap:16px;padding:var(--space-sm) 0;border-bottom:1px solid rgba(255,255,255,0.06);min-height:var(--touch-min)}
.contact-icon{font-size:1.5rem;flex-shrink:0}
.contact-item h4{font-size:var(--fs-sm);color:var(--text-muted);margin-bottom:2px}
.contact-cta{text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center}
.contact-cta h3{font-size:var(--fs-xl);font-weight:700;margin-bottom:var(--space-sm)}
.contact-cta p{font-size:var(--fs-base);color:var(--text-secondary);margin-bottom:var(--space-lg)}
.contact-buttons{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}

/* ===== Footer ===== */
#footer{
  position:relative;z-index:1;text-align:center;
  padding:var(--space-lg) var(--space-lg);border-top:1px solid rgba(255,255,255,0.06);
  background:rgba(10,10,26,0.5);
}
.footer-logo{font-family:var(--font-display);font-size:1.3rem;font-weight:700;color:var(--accent);margin-bottom:8px}
#footer p{font-size:var(--fs-base);color:var(--text-secondary)}
.footer-location{font-size:var(--fs-sm);color:var(--text-muted)}
.footer-links{display:flex;gap:16px;justify-content:center;margin-top:var(--space-sm)}
.footer-links a{color:var(--text-muted);transition:color var(--transition);min-width:var(--touch-min);min-height:var(--touch-min);display:inline-flex;align-items:center;justify-content:center}
.footer-links a:hover{color:var(--accent)}
.footer-copy{font-size:var(--fs-xs);color:var(--text-muted);margin-top:var(--space-sm)}

.reveal{opacity:0;transform:translateY(30px);transition:opacity 0.6s ease,transform 0.6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ============================================================
   RESPONSIVE BREAKPOINTS
   Base styles serve 1440px+ (large desktop)
   ============================================================ */

/* ===== 1441px+ : Large Desktop — base styles above ===== */

/* ===== 1200px : Laptop ===== */
@media(max-width:1200px){
  .section-container{max-width:960px}
  #hero{gap:var(--space-lg)}
  .hero-content{max-width:550px}
  .hero-visual{max-width:380px}
}

/* ===== 1024px : Small Laptop ===== */
@media(max-width:1024px){
  .skills-grid{grid-template-columns:repeat(2,1fr)}
  .section-container{max-width:860px}
  .hero-content{max-width:500px}
  .hero-visual{max-width:360px}
  .about-highlights{grid-template-columns:1fr 1fr}
}

/* ===== 768px : Tablet ===== */
@media(max-width:768px){
  /* Navigation mobile menu */
  #navbar{padding:12px var(--space-md)}
  .nav-links{
    display:none;position:fixed;top:0;left:0;right:0;bottom:0;
    background:rgba(10,10,26,0.98);
    flex-direction:column;align-items:center;justify-content:center;gap:16px;
    z-index:99;transition:opacity var(--transition);
  }
  .nav-links.open{display:flex}
  .nav-toggle{display:flex}
  .nav-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
  .nav-toggle.active span:nth-child(2){opacity:0}
  .nav-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
  .nav-link{font-size:1.1rem;padding:12px 24px;min-height:var(--touch-min)}

  /* Hero — stack vertically, code window above text */
  #hero{flex-direction:column;padding:clamp(80px,10vw,100px) var(--space-md) clamp(40px,5vw,60px);gap:var(--space-lg)}
  .hero-content,.hero-visual{max-width:100%}
  .hero-visual{order:-1}
  .hero-stats{gap:var(--space-md)}
  .hero-actions{justify-content:center}

  /* Section padding */
  .section-container{padding:clamp(40px,5vw,60px) var(--space-md)}

  /* Grids — single column on tablet/mobile */
  .about-grid{grid-template-columns:1fr}
  .about-highlights{grid-template-columns:1fr 1fr}
  .skills-grid{grid-template-columns:1fr 1fr}
  .projects-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}

  /* Timeline adjustments */
  .timeline-item{flex-direction:column;gap:var(--space-sm)}
  .timeline-date{order:-1}
  .timeline-icon{width:48px;height:48px;font-size:1.5rem}

  /* Code window */
  .code-window{font-size:0.75rem}
  .code-body{padding:12px 14px}
  .code-body pre{font-size:0.7rem;line-height:1.6}

  /* Detail items wrap nicely */
  .detail-item{flex-wrap:wrap;gap:4px}
  .detail-label{font-size:var(--fs-sm)}
  .detail-value{font-size:var(--fs-sm)}

  /* Contact CTA */
  .contact-cta h3{font-size:var(--fs-lg)}
}

/* ===== 480px : Mobile ===== */
@media(max-width:480px){
  /* Tighter navbar */
  #navbar{padding:10px var(--space-sm)}
  #navbar.scrolled{padding:8px var(--space-sm)}

  /* Hero tighter */
  #hero{padding:90px var(--space-sm) 40px;gap:var(--space-md)}
  .hero-badge{font-size:0.75rem;padding:6px 14px;gap:6px}
  .hero-title{flex-direction:column;gap:8px;align-items:flex-start}
  .title-separator{display:none}
  .hero-actions{flex-direction:column;width:100%;align-items:stretch}
  .btn{width:100%;justify-content:center}

  /* Stats stacked */
  .hero-stats{flex-direction:column;gap:var(--space-sm);align-items:flex-start}
  .stat{text-align:left;display:flex;align-items:center;gap:8px}
  .stat-number{font-size:1.4rem}
  .stat-label{font-size:0.7rem}

  /* Section container tighter */
  .section-container{padding:clamp(32px,4vw,48px) var(--space-sm)}

  /* About highlights single column */
  .about-highlights{grid-template-columns:1fr}

  /* Skills single column */
  .skills-grid{grid-template-columns:1fr}

  /* Project image shorter */
  .project-image{height:120px}

  /* Glass card padding tighter */
  .glass-card{padding:clamp(12px,1.5vw,16px)}
  .project-image{margin:-12px -12px var(--space-sm)}

  /* Detail items */
  .detail-item{padding:6px 0}

  /* Footer tighter */
  #footer{padding:var(--space-md) var(--space-sm)}
  .footer-links a{min-width:var(--touch-min);min-height:var(--touch-min)}

  /* Contact buttons */
  .contact-buttons{flex-direction:column;width:100%}
  .contact-buttons .btn{width:100%;justify-content:center}
}

/* ===== 320px : Small Mobile ===== */
@media(max-width:320px){
  html{font-size:14px;scroll-padding-top:60px}
  #navbar{padding:8px 12px}
  .nav-logo{font-size:1.1rem}
  #hero{padding:80px 12px 32px;min-height:auto}
  .hero-badge{font-size:0.7rem;padding:4px 10px}
  .hero-name{font-size:1.8rem}
  .hero-location{font-size:0.85rem}
  .hero-actions{gap:10px}
  .section-container{padding:32px 12px}
  .glass-card{padding:12px;border-radius:var(--radius-sm)}
  .project-image{height:100px;margin:-12px -12px 12px}
  .project-emoji{font-size:1.8rem}
  .code-body{padding:8px 10px}
  .code-body pre{font-size:0.65rem;line-height:1.5}
  .stat-number{font-size:1.2rem}
  .stat-label{font-size:0.65rem}
  .skill-tag{padding:4px 10px;font-size:0.7rem}
  .timeline-icon{width:40px;height:40px;font-size:1.2rem}
  .timeline-content h3{font-size:1rem}
  .timeline-content h4{font-size:0.85rem}
  .timeline-content p{font-size:0.8rem}
  .contact-cta h3{font-size:1.2rem}
  #footer{padding:24px 12px}
}

/* ===== Landscape phones — wider but short ===== */
@media(max-width:768px) and (orientation:landscape){
  #hero{min-height:auto;padding:80px var(--space-md) 40px}
  .hero-visual{order:0;max-width:50%}
  .hero-content{max-width:50%}
  #hero{flex-direction:row}
  .skills-grid{grid-template-columns:repeat(2,1fr)}
  .projects-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr 1fr}
}

/* ===== Hover disable for touch devices ===== */
@media(hover:none){
  .glass-card:hover{transform:none;box-shadow:none;background:var(--bg-card)}
  .project-card:hover .project-overlay{opacity:1}
  .skill-tag:hover{transform:none}
  .project-overlay{opacity:1}
}