/* styles.css - versión moderna con menú deslizante y animaciones */
/* Colores: gris metálico (#b0b0b0), gris oscuro (#1f1f1f), azul eléctrico (#007BFF) */

:root{
  --metal-gray: #b0b0b0;
  --dark: #1f1f1f;
  --blue: #007BFF;
  --blue-600: #0056b3;
  --bg: #f6f8fb;
  --radius: 12px;
  --shadow: 0 8px 30px rgba(15,20,30,0.08);
}

*{box-sizing:border-box}
body{font-family: 'Poppins', system-ui, -apple-system, 'Segoe UI', Roboto, Arial; margin:0; background:var(--bg); color:var(--dark); -webkit-font-smoothing:antialiased;}

.site-header{display:flex;align-items:center;justify-content:space-between;padding:18px 28px;background:linear-gradient(90deg,var(--dark),var(--blue));color:white;position:sticky;top:0;z-index:40;box-shadow:var(--shadow);}
.brand{display:flex;align-items:center;gap:14px}
.logo{height:56px;border-radius:8px;background:rgba(255,255,255,0.06);padding:6px}
.site-header h1{margin:0;font-size:20px;letter-spacing:0.6px}

.nav-desktop{display:flex;gap:18px}
.nav-desktop a{color:white;text-decoration:none;font-weight:600;transition:color .2s}
.nav-desktop a:hover{color:var(--metal-gray)}

/* Hamburger */
.hamburger{display:none;background:none;border:0;cursor:pointer;padding:8px;width:48px;height:48px;align-items:center;justify-content:center}
.hamburger .line{display:block;width:22px;height:2px;background:white;border-radius:2px;transition:all .35s ease}
.hamburger .line1{transform-origin:left top}
.hamburger.open .line1{transform:translateY(7px) rotate(45deg)}
.hamburger.open .line2{opacity:0;transform:scaleX(0)}
.hamburger.open .line3{transform:translateY(-7px) rotate(-45deg)}

/* Side menu */
.side-menu{position:fixed;top:0;right:-360px;width:320px;height:100vh;background:linear-gradient(180deg,white, #f7fbff);box-shadow:-12px 0 30px rgba(10,20,40,0.12);z-index:50;padding:30px;transition:right .35s ease}
.side-menu.open{right:0}
.side-nav{display:flex;flex-direction:column;gap:14px}
.side-link{font-weight:700;color:var(--dark);text-decoration:none;padding:10px;border-radius:8px}
.side-contact{margin-top:20px;color:#555;font-size:14px}

/* Overlay */
.overlay{position:fixed;inset:0;background:rgba(10,10,10,0.45);z-index:45;opacity:0;transition:opacity .3s;pointer-events:none}
.overlay.show{opacity:1;pointer-events:auto}

/* Hero */
.hero{max-width:1200px;margin:34px auto;display:grid;grid-template-columns:1fr 1fr;gap:28px;padding:0 20px;align-items:center}
.hero-text{background:white;padding:28px;border-radius:var(--radius);box-shadow:var(--shadow)}
.hero-text h2{color:var(--blue);margin:0 0 10px;font-size:28px}
.hero-text p{color:#444;line-height:1.6}
.hero-img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow)}

/* Sections */
.section-title{text-align:center;margin:48px 0 18px;font-size:24px;color:var(--dark)}
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;padding:0 20px 40px;max-width:1200px;margin:0 auto}
.gallery img{width:100%;height:220px;object-fit:cover;border-radius:10px;box-shadow:0 6px 20px rgba(12,20,30,0.06);transition:transform .35s,opacity .6s;opacity:0;transform:translateY(20px)}
.gallery img.visible{opacity:1;transform:translateY(0)}

.services{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;padding:0 20px 40px;max-width:1200px;margin:0 auto}
.service{background:white;padding:18px;border-radius:12px;box-shadow:0 6px 20px rgba(12,20,30,0.06);opacity:0;transform:translateY(18px);transition:all .6s}
.service.visible{opacity:1;transform:translateY(0)}
.service h3{color:var(--blue);margin-top:0}

/* Contact form */
.contact-section{max-width:900px;margin:30px auto;padding:0 20px}
.contact-form{display:grid;gap:12px;background:white;padding:20px;border-radius:12px;box-shadow:var(--shadow)}
.contact-form label{display:block;font-weight:600;color:#333}
.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea{width:100%;padding:10px;border:1px solid #e6e9ef;border-radius:8px;font-size:15px}
.form-actions{text-align:right}
.btn-submit{background:var(--blue);color:white;padding:12px 20px;border-radius:8px;border:0;font-weight:700;cursor:pointer;transition:background .25s}
.btn-submit:hover{background:var(--blue-600)}

/* Alerts */
.alert{padding:12px;border-radius:8px;margin-bottom:12px;font-weight:600}
.alert.success{background:#e6f7ee;color:#0b6b32}
.alert.error{background:#fdecea;color:#8a1515}

/* Footer */
footer{background:var(--dark);color:#ddd;padding:24px 18px;margin-top:40px}
.footer-inner{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;gap:20px;align-items:center;flex-wrap:wrap}
.footer-inner a{color:var(--blue);text-decoration:none;font-weight:600}
.copyright{text-align:center;color:#aaa;margin-top:12px}

/* Animations */
.fade-in{opacity:0;transform:translateY(18px);transition:all .9s ease-out}
.fade-in.visible{opacity:1;transform:none}

/* Responsive */
@media (max-width:900px){
  .nav-desktop{display:none}
  .hamburger{display:flex}
  .hero{grid-template-columns:1fr;gap:18px;padding:0 16px}
  .hero-img{height:260px;object-fit:cover}
  .gallery img{height:160px}
  .side-menu{width:85vw;right:-100vw}
}