/* ── CSS Variables ── */
:root {
  --accent: #31677D;
  --accent-light: #4a8fa8;
  --accent-dim: #1e4a5c;
  --accent-glow: rgba(49,103,125,0.25);

  --bg: #0d1117;
  --bg-2: #131920;
  --bg-3: #1a2430;
  --surface: #1e2d3d;
  --surface-2: #243344;
  --border: rgba(49,103,125,0.2);
  --border-strong: rgba(49,103,125,0.45);

  --text-primary: #f0f4f8;
  --text-secondary: #8fa8b8;
  --text-muted: #5a7080;

  --nav-h: 70px;
  --radius: 12px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

[data-theme="light"] {
  --bg: #f2f5f7;
  --bg-2: #e8eef2;
  --bg-3: #dce5eb;
  --surface: #ffffff;
  --surface-2: #eaf0f5;
  --border: rgba(49,103,125,0.15);
  --border-strong: rgba(49,103,125,0.4);
  --text-primary: #0d1a24;
  --text-secondary: #3d6070;
  --text-muted: #7a9aaa;
}

/* ── Reset ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;font-size:16px;}
body{
  font-family:'DM Sans',sans-serif;
  background:var(--bg);
  color:var(--text-primary);
  line-height:1.6;
  transition:background var(--transition),color var(--transition);
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none;}
ul{list-style:none;}
img{max-width:100%;display:block;}
button{cursor:pointer;border:none;background:none;font-family:inherit;}

/* ── Noise overlay ── */
body::before{
  content:'';
  position:fixed;inset:0;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events:none;z-index:0;opacity:.4;
}

/* ── NAV ── */
nav{
  position:fixed;top:0;left:0;right:0;
  height:var(--nav-h);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 clamp(1.5rem,5vw,4rem);
  background:rgba(13,17,23,0.8);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  z-index:100;
  transition:background var(--transition),border-color var(--transition);
}
[data-theme="light"] nav{background:rgba(242,245,247,0.85);}

.nav-logo{
  font-family:'Bebas Neue',sans-serif;
  font-size:1.6rem;
  letter-spacing:2px;
  color:var(--accent-light);
}
.nav-logo span{color:var(--text-primary);}

.nav-links{
  display:flex;gap:2rem;align-items:center;
}
.nav-links a{
  font-size:0.78rem;font-weight:600;letter-spacing:1.5px;
  text-transform:uppercase;color:var(--text-secondary);
  position:relative;transition:color var(--transition);
}
.nav-links a::after{
  content:'';position:absolute;bottom:-4px;left:0;width:0;height:1px;
  background:var(--accent-light);transition:width var(--transition);
}
.nav-links a:hover{color:var(--text-primary);}
.nav-links a:hover::after{width:100%;}

.nav-controls{display:flex;gap:0.5rem;align-items:center;}

.ctrl-btn{
  width:38px;height:38px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--border-strong);
  color:var(--text-secondary);
  font-size:0.7rem;font-weight:700;letter-spacing:0.5px;
  transition:all var(--transition);
  background:var(--surface);
}
.ctrl-btn:hover{
  background:var(--accent);color:#fff;
  border-color:var(--accent);transform:scale(1.08);
}
.ctrl-btn svg{width:16px;height:16px;fill:currentColor;}

/* hamburger */
.hamburger{
  display:none;flex-direction:column;gap:5px;
  width:38px;height:38px;align-items:center;justify-content:center;
}
.hamburger span{display:block;width:22px;height:2px;background:var(--text-secondary);transition:all var(--transition);}

/* ── SECTIONS ── */
section{position:relative;z-index:1;}

/* ── HERO ── */
#hero{
  min-height:100vh;
  display:grid;
  grid-template-columns:1fr 1fr;
  padding-top:var(--nav-h);
}
.hero-left{
  display:flex;flex-direction:column;justify-content:center;
  padding:clamp(3rem,8vw,6rem) clamp(1.5rem,5vw,4rem) clamp(3rem,8vw,6rem) clamp(1.5rem,7vw,6rem);
}
.hero-tag{
  display:inline-flex;align-items:center;gap:0.5rem;
  font-family:'JetBrains Mono',monospace;
  font-size:0.7rem;letter-spacing:2px;text-transform:uppercase;
  color:var(--accent-light);margin-bottom:1.5rem;
}
.hero-tag::before{content:'▶';font-size:0.6rem;}

.hero-name{
  font-family:'Bebas Neue',sans-serif;
  font-size:clamp(4rem,9vw,8rem);
  line-height:.95;
  color:var(--text-primary);
  margin-bottom:1rem;
  letter-spacing:-1px;
}
.hero-name em{
  font-style:normal;
  -webkit-text-stroke:2px var(--accent-light);
  color:transparent;
}

.hero-sub{
  font-size:clamp(1rem,2vw,1.2rem);
  color:var(--text-secondary);
  max-width:480px;
  margin-bottom:2.5rem;
  font-weight:300;
  line-height:1.7;
}
.hero-sub strong{color:var(--accent-light);font-weight:600;}

.hero-cta{
  display:flex;gap:1rem;align-items:center;flex-wrap:wrap;
  margin-bottom:3rem;
}
.btn-primary{
  display:inline-flex;align-items:center;gap:0.6rem;
  background:var(--accent);color:#fff;
  padding:.85rem 2rem;border-radius:4px;
  font-weight:600;font-size:0.85rem;letter-spacing:1px;text-transform:uppercase;
  transition:all var(--transition);
  border:1px solid var(--accent);
}
.btn-primary:hover{background:var(--accent-light);border-color:var(--accent-light);transform:translateY(-2px);box-shadow:0 8px 24px var(--accent-glow);}
.btn-secondary{
  display:inline-flex;align-items:center;gap:0.6rem;
  border:1px solid var(--border-strong);color:var(--text-secondary);
  padding:.85rem 2rem;border-radius:4px;
  font-weight:600;font-size:0.85rem;letter-spacing:1px;text-transform:uppercase;
  transition:all var(--transition);
}
.btn-secondary:hover{border-color:var(--accent-light);color:var(--text-primary);transform:translateY(-2px);}

.hero-socials{display:flex;gap:0.75rem;}
.hero-social{
  width:42px;height:42px;border-radius:50%;
  border:1px solid var(--border-strong);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-secondary);
  transition:all var(--transition);
}
.hero-social:hover{
  border-color:var(--accent-light);color:var(--accent-light);
  background:var(--accent-glow);transform:translateY(-3px);
}
.hero-social svg{width:16px;height:16px;fill:currentColor;}

/* hero right — photo */
.hero-right{
  position:relative;
  display:flex;align-items:flex-end;justify-content:center;
  overflow:hidden;
}
.hero-photo-wrap{
  position:relative;width:100%;height:100%;
  background:linear-gradient(135deg,var(--bg-3) 0%,var(--bg-2) 100%);
}
.hero-photo-wrap::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(to right,var(--bg) 0%,transparent 30%);
  pointer-events:none;z-index:1;
}
.hero-photo-placeholder{
  width:100%;height:100%;min-height:500px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  color:var(--text-muted);gap:1rem;
  font-family:'JetBrains Mono',monospace;font-size:0.75rem;
  position:relative;z-index:0;
}
.photo-icon{
  width:80px;height:80px;border-radius:50%;
  border:2px dashed var(--border-strong);
  display:flex;align-items:center;justify-content:center;
  font-size:2rem;
}

.hero-photo-wrap img.hero-photo-img{
  width:100%;height:100%;object-fit:cover;display:block;position:relative;z-index:0;
}
.photo-change-btn{
  position:absolute;top:1rem;left:1rem;z-index:3;padding:0.4rem 0.6rem;border-radius:6px;background:var(--surface);border:1px solid var(--border-strong);color:var(--text-secondary);font-weight:600;font-size:0.8rem;cursor:pointer;backdrop-filter:blur(6px);
}
.hero-badge{
  position:absolute;bottom:2.5rem;right:2.5rem;z-index:2;
  background:var(--surface);border:1px solid var(--border-strong);
  border-radius:8px;padding:1rem 1.5rem;
  display:flex;flex-direction:column;gap:0.25rem;
  backdrop-filter:blur(8px);
}
.hero-badge-num{
  font-family:'Bebas Neue',sans-serif;font-size:2.2rem;
  color:var(--accent-light);line-height:1;
}
.hero-badge-txt{font-size:0.7rem;color:var(--text-muted);letter-spacing:1px;text-transform:uppercase;}

/* ── DIVIDER ── */
.section-divider{
  width:60px;height:3px;background:var(--accent);
  margin-bottom:1rem;
}

/* ── Section header ── */
.section-header{margin-bottom:clamp(2.5rem,5vw,4rem);}
.section-label{
  font-family:'JetBrains Mono',monospace;
  font-size:0.7rem;letter-spacing:3px;text-transform:uppercase;
  color:var(--accent-light);margin-bottom:0.75rem;display:block;
}
.section-title{
  font-family:'Bebas Neue',sans-serif;
  font-size:clamp(2.5rem,5vw,4rem);
  line-height:1;color:var(--text-primary);
  letter-spacing:1px;
}

.container{
  max-width:1200px;margin:0 auto;
  padding:clamp(4rem,8vw,7rem) clamp(1.5rem,5vw,4rem);
}

/* ── PROJECTS ── */
#projects{background:var(--bg-2);}

.projects-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:1.5rem;
}
.project-horizontal{
  display:flex;align-items:stretch;gap:1rem;
  background:var(--surface);border:1px solid var(--border);
  border-radius:16px;overflow:hidden;padding:0;transition:all var(--transition);
}
.project-horizontal:hover{border-color:var(--accent);transform:translateY(-6px);box-shadow:0 20px 40px rgba(0,0,0,.35);}
.project-horizontal .project-content{padding:1.5rem;flex:1;display:flex;flex-direction:column;gap:0.6rem;}
.project-horizontal .project-media{width:45%;min-width:220px;display:flex;align-items:center;justify-content:center;overflow:hidden;background:linear-gradient(180deg,var(--bg-3),var(--surface-2));}
.project-horizontal .project-media img{width:100%;height:100%;object-fit:cover;border-left:1px solid var(--border);}
.project-horizontal .project-tag-pill{position:absolute;top:1rem;left:1rem;}
.project-horizontal .project-footer{padding:1rem 1.5rem;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;}

@media(min-width:900px){
  .projects-grid{grid-template-columns:repeat(2,1fr);} 
}
@media(max-width:900px){
  .project-horizontal{flex-direction:column;}
  .project-horizontal .project-media{width:100%;min-height:180px;border-left:none;border-top:1px solid var(--border);}
  .project-horizontal .project-media img{border-left:none}
}
.project-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
  transition:all var(--transition);
  display:flex;flex-direction:column;
}
.project-card:hover{
  border-color:var(--accent);
  transform:translateY(-6px);
  box-shadow:0 20px 40px rgba(0,0,0,.35),0 0 0 1px var(--accent-dim);
}
.project-top{
  height:180px;
  background:linear-gradient(135deg,var(--bg-3),var(--surface-2));
  display:flex;align-items:center;justify-content:center;
  position:relative;overflow:hidden;
}
.project-top::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(circle at 70% 30%,var(--accent-glow),transparent 60%);
}
.project-icon{font-size:3rem;z-index:1;position:relative;}
.project-tag-pill{
  position:absolute;top:1rem;left:1rem;
  background:var(--accent-dim);border:1px solid var(--accent);
  color:var(--accent-light);font-size:0.65rem;font-weight:600;
  letter-spacing:1px;text-transform:uppercase;
  padding:.25rem .7rem;border-radius:100px;
  font-family:'JetBrains Mono',monospace;
}
.project-body{padding:1.5rem;flex:1;display:flex;flex-direction:column;gap:0.75rem;}
.project-title{
  font-size:1.05rem;font-weight:600;color:var(--text-primary);
}
.project-desc{font-size:0.85rem;color:var(--text-secondary);line-height:1.6;flex:1;}
.project-footer{
  display:flex;align-items:center;justify-content:space-between;
  padding:1rem 1.5rem;
  border-top:1px solid var(--border);
}
.tech-tags{display:flex;gap:0.4rem;flex-wrap:wrap;}
.tech-tag{
  font-family:'JetBrains Mono',monospace;
  font-size:0.65rem;letter-spacing:.5px;
  padding:.2rem .55rem;border-radius:4px;
  background:var(--bg-3);color:var(--text-muted);
  border:1px solid var(--border);
}
.project-link{
  width:32px;height:32px;border-radius:50%;
  border:1px solid var(--border-strong);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-muted);transition:all var(--transition);
  flex-shrink:0;
}
.project-link:hover{border-color:var(--accent);color:var(--accent-light);}
.project-link svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2;}

/* ── SKILLS / TECNOLOGÍAS ── */
#skills{background:var(--bg);}

.tech-categories{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:1.5rem;
}
.tech-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:1.75rem;
  transition:border-color var(--transition),transform var(--transition);
}
.tech-card:hover{border-color:var(--accent);transform:translateY(-4px);}

.tech-card-title{
  font-family:'Bebas Neue',sans-serif;
  font-size:1.5rem;letter-spacing:1px;
  color:var(--accent-light);
  margin-bottom:1.5rem;
  padding-bottom:.75rem;
  border-bottom:1px solid var(--border);
}
.tech-icons-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1.25rem 0.75rem;
}
.tech-item{
  display:flex;flex-direction:column;align-items:center;gap:.5rem;
  cursor:default;
}
.tech-item-icon{
  width:52px;height:52px;border-radius:10px;
  background:var(--bg-3);border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  font-size:1.6rem;
  transition:all var(--transition);
}
.tech-item:hover .tech-item-icon{
  border-color:var(--accent);
  background:var(--surface-2);
  transform:translateY(-3px);
  box-shadow:0 6px 18px var(--accent-glow);
}
.tech-item-name{
  font-size:.68rem;font-weight:500;
  color:var(--text-muted);text-align:center;
  letter-spacing:.3px;
  transition:color var(--transition);
}
.tech-item:hover .tech-item-name{color:var(--text-secondary);}

/* SVG icons inside tech items */
.tech-item-icon svg{width:28px;height:28px;}

@media(max-width:768px){
  .tech-categories{grid-template-columns:1fr;}
  .tech-icons-grid{grid-template-columns:repeat(3,1fr);}
}

/* ── ABOUT ── */
#about{background:var(--bg-2);}

.about-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center;
}
.about-text p{
  font-size:clamp(.9rem,1.5vw,1rem);
  color:var(--text-secondary);line-height:1.8;margin-bottom:1rem;
}
.about-text p strong{color:var(--accent-light);}

.about-stats{
  display:grid;grid-template-columns:1fr 1fr;gap:1rem;
}
.stat-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:1.5rem;
  transition:all var(--transition);
}
.stat-card:hover{border-color:var(--accent);transform:translateY(-3px);}
.stat-num{
  font-family:'Bebas Neue',sans-serif;font-size:2.8rem;
  color:var(--accent-light);line-height:1;
}
.stat-label{font-size:.75rem;color:var(--text-muted);letter-spacing:1px;text-transform:uppercase;margin-top:.25rem;}

/* ── CONTACT ── */
#contact{background:var(--bg);}

.contact-inner{
  max-width:700px;margin:0 auto;text-align:center;
}
.contact-inner .section-divider{margin:0 auto 1rem;}
.contact-headline{
  font-family:'Bebas Neue',sans-serif;
  font-size:clamp(2.5rem,6vw,5rem);
  line-height:1;color:var(--text-primary);
  margin-bottom:1rem;
}
.contact-headline em{font-style:normal;color:var(--accent-light);}
.contact-sub{font-size:.95rem;color:var(--text-secondary);margin-bottom:2.5rem;line-height:1.7;}
.contact-links{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;}
.contact-link{
  display:flex;align-items:center;gap:.6rem;
  padding:.8rem 1.6rem;border-radius:6px;
  border:1px solid var(--border-strong);color:var(--text-secondary);
  font-size:.8rem;font-weight:600;letter-spacing:1px;text-transform:uppercase;
  transition:all var(--transition);
}
.contact-link svg{width:16px;height:16px;fill:currentColor;flex-shrink:0;}
.contact-link:hover{border-color:var(--accent);color:var(--accent-light);transform:translateY(-2px);}
.contact-link.primary{background:var(--accent);border-color:var(--accent);color:#fff;}
.contact-link.primary:hover{background:var(--accent-light);border-color:var(--accent-light);}

/* ── FOOTER ── */
footer{
  border-top:1px solid var(--border);
  padding:1.5rem clamp(1.5rem,5vw,4rem);
  display:flex;justify-content:space-between;align-items:center;
  background:var(--bg);position:relative;z-index:1;flex-wrap:wrap;gap:1rem;
}
.footer-copy{font-size:.75rem;color:var(--text-muted);font-family:'JetBrains Mono',monospace;}
.footer-socials{display:flex;gap:.6rem;}
.footer-social{
  width:34px;height:34px;border-radius:50%;
  border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-muted);transition:all var(--transition);
}
.footer-social:hover{border-color:var(--accent);color:var(--accent-light);}
.footer-social svg{width:14px;height:14px;fill:currentColor;}

/* ── FADE-IN ANIMATION ── */
.fade-up{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease;}
.fade-up.visible{opacity:1;transform:none;}

/* ── MOBILE NAV ── */
@media(max-width:768px){
  .nav-links{display:none;position:fixed;top:var(--nav-h);left:0;right:0;
    flex-direction:column;background:var(--bg-2);padding:2rem;gap:1.5rem;
    border-bottom:1px solid var(--border);}
  .nav-links.open{display:flex;}
  .hamburger{display:flex;}

  #hero{grid-template-columns:1fr;}
  .hero-right{display:none;}
  .hero-left{padding:3rem 1.5rem;}

  .about-grid{grid-template-columns:1fr;gap:2.5rem;}
  .projects-grid{grid-template-columns:1fr;}
  .contact-links{flex-direction:column;align-items:center;}
  footer{flex-direction:column;text-align:center;}
}
@media(min-width:769px) and (max-width:1024px){
  #hero{grid-template-columns:1fr 1fr;}
  .hero-name{font-size:clamp(3rem,7vw,6rem);}
}