/*
====================================================
GUFO TECH WEBSITE - LEVEL 4 PREMIUM CSS
Version: V4.0
Reusable base stylesheet for the main website and future subpages.

Image paths used in HTML/CSS:
/imagenes/logo.png
/imagenes/service-web-design.jpg
/imagenes/service-dynamic-websites.jpg
/imagenes/service-custom-apps.jpg
/imagenes/service-software.jpg
/imagenes/why-gufo-tech.jpg
/imagenes/parallax-why.jpg
/imagenes/parallax-contact.jpg
====================================================
*/

/* ====================================================
   1. DESIGN TOKENS
==================================================== */
:root{
    --bg-main:#07111f;
    --bg-soft:#0c1b30;
    --bg-card:rgba(12,30,54,.72);
    --blue-primary:#3aa8ff;
    --blue-soft:#7cc7ff;
    --blue-deep:#0b5ea8;
    --cyan:#39f0ff;
    --white:#ffffff;
    --text:#eaf6ff;
    --muted:rgba(234,246,255,.72);
    --line:rgba(130,200,255,.18);
    --shadow:0 25px 80px rgba(0,0,0,.45);
    --radius-lg:34px;
    --radius-md:22px;
    --container:min(1180px,92%);
}

/* ====================================================
   2. RESET + BASE
==================================================== */
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
    font-family:Arial, Helvetica, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(58,168,255,.18), transparent 28%),
        linear-gradient(135deg,#07111f,#0b1b32 45%,#102744);
    color:var(--text);
    overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{text-decoration:none;color:inherit;}
section{position:relative;}

/* ====================================================
   3. REUSABLE COMPONENTS
==================================================== */
.section{width:var(--container);margin:auto;padding:110px 0;}
.section-header{text-align:center;max-width:820px;margin:0 auto 50px;}
.section-kicker{
    display:inline-block;
    margin-bottom:14px;
    color:var(--cyan);
    text-transform:uppercase;
    letter-spacing:2px;
    font-size:.78rem;
    font-weight:800;
}
.section-header h2,.text-card h2,.security-card h2,.contact-card h2{
    font-size:clamp(2.2rem,5vw,4.3rem);
    line-height:1;
    letter-spacing:-2px;
    margin-bottom:18px;
}
.section-header p,.text-card p,.security-card p,.contact-card p{
    color:var(--muted);
    line-height:1.8;
    font-size:1.05rem;
}
.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-height:52px;
    padding:0 24px;
    border-radius:999px;
    font-weight:800;
    letter-spacing:.3px;
    transition:.3s ease;
    border:1px solid transparent;
}
.btn-primary{
    background:linear-gradient(135deg,var(--blue-primary),var(--cyan));
    color:#03111f;
    box-shadow:0 14px 40px rgba(58,168,255,.28);
}
.btn-primary:hover{transform:translateY(-4px);box-shadow:0 20px 55px rgba(58,168,255,.42);}
.btn-outline{
    border-color:rgba(255,255,255,.22);
    color:var(--text);
    background:rgba(255,255,255,.06);
    backdrop-filter:blur(12px);
}
.btn-outline:hover{border-color:var(--blue-soft);transform:translateY(-4px);}

/* ====================================================
   4. STICKY NAVIGATION
==================================================== */
.site-header{
    position:fixed;
    top:0;left:0;width:100%;
    z-index:1000;
    transition:.3s ease;
}
.site-header.scrolled{
    background:rgba(5,14,27,.78);
    backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);
}
.navbar{
    width:var(--container);
    height:78px;
    margin:auto;
    display:flex;
    align-items:center;
    justify-content:space-between;
}
.nav-logo{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:.4px;}
.nav-logo img{width:44px;height:44px;object-fit:contain;filter:drop-shadow(0 0 18px rgba(58,168,255,.4));}
.nav-menu{display:flex;align-items:center;gap:8px;list-style:none;}
.nav-menu a{
    display:block;
    padding:10px 14px;
    border-radius:999px;
    color:rgba(234,246,255,.82);
    font-size:.92rem;
    transition:.25s ease;
}
.nav-menu a:hover{background:rgba(255,255,255,.08);color:var(--white);}
.nav-menu .nav-cta{background:rgba(58,168,255,.18);border:1px solid rgba(58,168,255,.28);color:var(--white);}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;}
.nav-toggle span{display:block;width:28px;height:2px;background:var(--white);margin:6px 0;border-radius:4px;}

/* ====================================================
   5. HERO LEVEL 4
==================================================== */
.hero{
    min-height:100vh;
    display:grid;
    place-items:center;
    text-align:center;
    overflow:hidden;
    padding:120px 20px 80px;
    background:
        linear-gradient(rgba(5,15,30,.55), rgba(5,15,30,.72)),
        radial-gradient(circle at 50% 30%, rgba(58,168,255,.22), transparent 38%),
        linear-gradient(135deg,#06101d,#0b1d37 50%,#12305a);
}
.tech-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:0;}
.hero::before{
    content:"";
    position:absolute;inset:0;
    background-image:radial-gradient(rgba(255,255,255,.42) 1px, transparent 1px);
    background-size:70px 70px;
    opacity:.13;
    animation:starDrift 28s linear infinite;
    z-index:1;
}
.hero-glow{position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;z-index:1;}
.hero-glow-one{width:360px;height:360px;background:rgba(58,168,255,.35);top:16%;left:8%;}
.hero-glow-two{width:420px;height:420px;background:rgba(57,240,255,.18);right:8%;bottom:12%;}
.hero-content{position:relative;z-index:2;max-width:980px;}
.hero-logo{
    width:clamp(180px,25vw,330px);
    margin:0 auto 28px;
    filter:drop-shadow(0 0 38px rgba(58,168,255,.48));
    animation:logoFloat 6s ease-in-out infinite;
}
.eyebrow{color:var(--cyan);text-transform:uppercase;letter-spacing:2.5px;font-weight:900;font-size:.82rem;margin-bottom:16px;}
.hero h1{font-size:clamp(2.6rem,7vw,6.9rem);line-height:.92;letter-spacing:-4px;margin-bottom:24px;}
.hero-description{max-width:850px;margin:0 auto;color:rgba(234,246,255,.78);font-size:clamp(1rem,2vw,1.22rem);line-height:1.8;}
.hero-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;margin-top:34px;}
.scroll-indicator{position:absolute;z-index:3;bottom:24px;left:50%;transform:translateX(-50%);width:30px;height:48px;border:1px solid rgba(255,255,255,.28);border-radius:999px;}
.scroll-indicator span{position:absolute;top:10px;left:50%;width:5px;height:5px;border-radius:50%;background:var(--cyan);transform:translateX(-50%);animation:scrollDot 1.7s infinite;}

/* ====================================================
   6. INTERACTIVE SERVICE PANELS
==================================================== */
.service-panels{display:flex;gap:14px;min-height:650px;}
.service-panel{
    position:relative;
    flex:1;
    overflow:hidden;
    border-radius:var(--radius-lg);
    border:1px solid var(--line);
    background-image:
    linear-gradient(135deg,rgba(5,15,30,.55),rgba(8,25,48,.88)),
    var(--panel-image);

    background-position:
    center,
    center center;

    background-size:
    cover,
    100% 100%;

    background-repeat:
    no-repeat,
    no-repeat;
    cursor:pointer;
    transition:flex .7s cubic-bezier(.2,.8,.2,1), transform .35s ease, box-shadow .35s ease;
    box-shadow:0 14px 45px rgba(0,0,0,.25);
}
.service-panel.active,.service-panel:hover{flex:4;transform:translateY(-8px);box-shadow:var(--shadow);}
.panel-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,15,30,.18),rgba(4,12,24,.92));z-index:1;}
.vertical-title{
    position:absolute;top:50%;left:50%;z-index:2;
    transform:translate(-50%,-50%) rotate(180deg);
    writing-mode:vertical-rl;
    font-size:clamp(2.2rem,4vw,3.8rem);
    font-weight:950;
    letter-spacing:-1px;
    color:rgba(255,255,255,.92);
    transition:.35s ease;
    text-shadow:0 0 25px rgba(58,168,255,.25);
}
.service-panel.active .vertical-title,.service-panel:hover .vertical-title{opacity:.08;}
.panel-content{
    position:absolute;left:36px;right:36px;bottom:36px;z-index:3;
    opacity:0;transform:translateY(28px);transition:.45s ease;
    max-width:520px;
}
.service-panel.active .panel-content,.service-panel:hover .panel-content{opacity:1;transform:none;}
.panel-content span{color:var(--cyan);text-transform:uppercase;letter-spacing:1.6px;font-size:.78rem;font-weight:900;}
.panel-content h3{font-size:clamp(2rem,4vw,3.5rem);line-height:1;margin:10px 0 16px;}
.panel-content p{color:rgba(234,246,255,.78);line-height:1.8;}
.panel-tags{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 24px;}
.panel-tags small{padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.12);}
.panel-btn{display:inline-flex;padding:12px 18px;border-radius:999px;background:rgba(58,168,255,.18);border:1px solid rgba(58,168,255,.36);font-weight:800;transition:.25s;}
.panel-btn:hover{background:var(--blue-primary);color:#03111f;}

/* ====================================================
   7. PARALLAX + WHY SECTION
==================================================== */
.parallax-section,.contact-section{overflow:hidden;padding:120px 0;}
.parallax-bg{position:absolute;inset:0;background-attachment:fixed;background-position:center;background-size:cover;opacity:.28;z-index:0;}
.parallax-why{background-image:linear-gradient(rgba(3,10,20,.6),rgba(3,10,20,.8)),url('../../imagenes/parallax-why.png');}
.parallax-contact{background-image:linear-gradient(rgba(3,10,20,.5),rgba(3,10,20,.8)),url('../../imagenes/parallax-why.png');}
.section-grid{position:relative;z-index:1;width:var(--container);margin:auto;display:grid;grid-template-columns:1fr 1.1fr;gap:44px;align-items:center;}
.visual-card,.text-card,.contact-card,.security-card{
    background:var(--bg-card);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow);
    backdrop-filter:blur(16px);
}
.visual-card{
    padding:6px;
}

.visual-card img{
    width:100%;
    border-radius:26px;
    display:block;
}
.text-card{padding:44px;}
.feature-list{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.feature-list span{padding:12px 14px;border-radius:999px;background:rgba(58,168,255,.12);border:1px solid rgba(58,168,255,.22);font-weight:800;}

/* ====================================================
   8. SPECIALTIES, DEMOS, PROCESS
==================================================== */
/* ====================================================
   DEMO PROJECTS PARALLAX
==================================================== */

.parallax-demo{
    position:relative;
    overflow:hidden;
}

.parallax-demo::before{
    content:"";
    position:absolute;
    inset:0;

    background:
        linear-gradient(
            rgba(3,10,20,.85),
            rgba(3,10,20,.90)
        ),
        url('../../imagenes/parallax-demo.png');

    background-size:cover;
    background-position:center;
    background-attachment:fixed;

    opacity:.35;
    z-index:0;
}

.parallax-demo > *{
    position:relative;
    z-index:1;
}
.specialty-grid,.process-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.specialty-grid article,.process-grid div{
    padding:28px;
    border-radius:var(--radius-md);
    background:linear-gradient(145deg,rgba(255,255,255,.08),rgba(255,255,255,.025));
    border:1px solid var(--line);
    transition:.3s ease;
}
.specialty-grid article:hover,.process-grid div:hover{transform:translateY(-6px);border-color:rgba(58,168,255,.4);}
.specialty-grid h3,.process-grid h3{font-size:1.25rem;margin-bottom:10px;}
.specialty-grid p,.process-grid p{color:var(--muted);line-height:1.7;}
.process-grid span{display:inline-block;color:var(--cyan);font-size:2rem;font-weight:950;margin-bottom:16px;}
.demo-buttons{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.demo-btn{
    min-height:110px;
    display:grid;place-items:center;
    text-align:center;
    border-radius:var(--radius-md);
    background:linear-gradient(135deg,rgba(58,168,255,.16),rgba(57,240,255,.06));
    border:1px solid rgba(58,168,255,.25);
    font-weight:900;
    transition:.3s ease;
}
.demo-btn:hover{transform:translateY(-6px) scale(1.02);background:linear-gradient(135deg,rgba(58,168,255,.34),rgba(57,240,255,.12));}

/* ====================================================
   9. GUFO SECURITY + CONTACT
==================================================== */
.security-section{width:var(--container);margin:auto;padding:20px 0 110px;}
.security-card{padding:42px;display:flex;align-items:center;justify-content:space-between;gap:32px;}
.security-card > div{max-width:760px;}
.contact-card{position:relative;z-index:1;width:min(900px,92%);margin:auto;text-align:center;padding:58px 34px;}
.email-link{display:inline-block;margin-top:18px;font-size:1.3rem;color:var(--cyan);font-weight:900;}
.contact-actions{margin-top:28px;}
.footer{text-align:center;padding:26px;color:rgba(234,246,255,.65);border-top:1px solid var(--line);background:rgba(3,10,20,.45);}

/* ====================================================
   10. ANIMATIONS
==================================================== */
@keyframes logoFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
@keyframes starDrift{from{transform:translateY(0)}to{transform:translateY(-70px)}}
@keyframes scrollDot{0%{opacity:1;transform:translate(-50%,0)}100%{opacity:0;transform:translate(-50%,22px)}}

/* ====================================================
   11. RESPONSIVE DESIGN
==================================================== */
@media(max-width:980px){
    .nav-toggle{display:block;}
    .nav-menu{
        position:absolute;top:78px;left:4%;right:4%;
        display:none;flex-direction:column;align-items:stretch;
        padding:18px;
        background:rgba(5,14,27,.94);
        border:1px solid var(--line);
        border-radius:22px;
        backdrop-filter:blur(18px);
    }
    .nav-menu.open{display:flex;}
    .nav-menu a{text-align:center;padding:14px;}
    .service-panels{flex-direction:column;min-height:auto;}
    .service-panel{height:430px;flex:none;transform:none!important;}
    .service-panel.active,.service-panel:hover{flex:none;}
    .vertical-title{writing-mode:horizontal-tb;transform:translate(-50%,-50%);font-size:2.2rem;opacity:.1;}
    .panel-content{opacity:1;transform:none;left:24px;right:24px;bottom:24px;}
    .section-grid{grid-template-columns:1fr;}
    .specialty-grid,.process-grid{grid-template-columns:1fr 1fr;}
    .demo-buttons{grid-template-columns:1fr 1fr;}
    .security-card{flex-direction:column;align-items:flex-start;}
    .parallax-bg{background-attachment:scroll;}
    .parallax-demo::before{
    background-attachment:scroll;
}
}

@media(max-width:620px){
    .navbar{height:72px;}
    .hero{padding-top:110px;}
    .hero h1{letter-spacing:-2px;}
    .hero-actions{flex-direction:column;align-items:center;}
    .btn{width:100%;max-width:320px;}
    .section{padding:80px 0;}
    .service-panel{height:460px;border-radius:24px;}
    .panel-content h3{font-size:2rem;}
    .specialty-grid,.process-grid,.demo-buttons{grid-template-columns:1fr;}
    .text-card,.security-card,.contact-card{padding:28px;}
    .visual-card img{min-height:260px;}
}

/* ====================================================
   12. ACCESSIBILITY: REDUCED MOTION
==================================================== */
@media(prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
}