/* DCTECH Website Styles */

/* --- CSS Custom Properties --- */
:root {
  --color-primary: #0d47a1;
  --color-primary-light: #1565c0;
  --color-accent: #00acc1;
  --color-accent-light: #26c6da;
  --color-dark: #1a1a2e;
  --color-text: #333;
  --color-text-light: #666;
  --color-bg: #fff;
  --color-bg-alt: #f5f7fa;
  --color-bg-dark: #0d1b2a;
  --color-border: #e0e0e0;
  --color-white: #fff;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.12);
  --shadow-md: 0 4px 16px rgba(0,0,0,.1);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.12);
  --radius: 8px;
  --max-width: 1200px;
  --nav-height: 72px;
}

/* --- Reset --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);color:var(--color-text);line-height:1.6;background:var(--color-bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--color-primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--color-accent)}
ul{list-style:none}

/* --- Typography --- */
h1,h2,h3,h4{color:var(--color-dark);line-height:1.3}
h1{font-size:2.5rem;font-weight:800}
h2{font-size:2rem;font-weight:700}
h3{font-size:1.5rem;font-weight:600}
h4{font-size:1.125rem;font-weight:600}
p{margin-bottom:1rem}

/* --- Utility --- */
.container{max-width:var(--max-width);margin:0 auto;padding:0 1.5rem}
.section{padding:5rem 0}
.section-title{text-align:center;margin-bottom:3rem}
.section-title h2{position:relative;display:inline-block}
.section-title h2::after{content:"";display:block;width:60px;height:3px;background:var(--color-accent);margin:.75rem auto 0;border-radius:2px}
.section-title p{color:var(--color-text-light);max-width:600px;margin:1rem auto 0}
.btn{display:inline-block;padding:.75rem 1.75rem;font-weight:600;border-radius:var(--radius);transition:all .25s;cursor:pointer;border:none;font-size:1rem}
.btn-primary{background:var(--color-primary);color:var(--color-white)}
.btn-primary:hover{background:var(--color-primary-light);color:var(--color-white);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-outline{background:transparent;color:var(--color-primary);border:2px solid var(--color-primary)}
.btn-outline:hover{background:var(--color-primary);color:var(--color-white)}
.btn-white{background:var(--color-white);color:var(--color-primary)}
.btn-white:hover{background:#e8e8e8;color:var(--color-primary)}

/* --- Navigation --- */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);border-bottom:1px solid var(--color-border);height:var(--nav-height);transition:box-shadow .3s}
.nav.scrolled{box-shadow:var(--shadow-sm)}
.nav .container{display:flex;align-items:center;justify-content:space-between;height:100%}
.nav-logo img{height:40px;width:auto}
.nav-links{display:flex;align-items:center;gap:2rem}
.nav-links a{color:var(--color-dark);font-weight:500;font-size:.95rem;position:relative}
.nav-links a:hover,.nav-links a.active{color:var(--color-primary)}
.nav-links a::after{content:"";position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--color-primary);transition:width .25s}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.lang-toggle{display:inline-flex;align-items:center;gap:4px;padding:6px 14px;font-size:.85rem;font-weight:600;color:var(--color-primary);background:transparent;border:1.5px solid var(--color-primary);border-radius:20px;cursor:pointer;transition:all .25s;white-space:nowrap}
.lang-toggle:hover{background:var(--color-primary);color:var(--color-white)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px;background:none;border:none}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--color-dark);transition:all .3s}
.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)}

/* --- Hero --- */
.hero{min-height:100vh;display:flex;align-items:center;position:relative;overflow:hidden;background:linear-gradient(135deg, var(--color-bg-dark) 0%, #162447 50%, var(--color-primary) 100%)}
.hero::before{content:"";position:absolute;inset:0;background:url('../images/hero-bg.png') center/cover no-repeat;opacity:.15}
.hero-content{position:relative;z-index:1;text-align:center;color:var(--color-white);padding:2rem 0;width:100%}
.hero-logo{margin-bottom:1.5rem}
.hero-logo img{height:60px;width:auto;margin:0 auto;filter:brightness(0) invert(1)}
.hero h1{font-size:3rem;color:var(--color-white);margin-bottom:1rem}
.hero .tagline{font-size:1.25rem;color:rgba(255,255,255,.85);max-width:600px;margin:0 auto 2rem;letter-spacing:.05em;font-weight:300}
.hero .hero-buttons{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}
.hero-scroll{position:absolute;bottom:2rem;left:50%;transform:translateX(-50%);color:rgba(255,255,255,.6);font-size:.85rem;animation:bounce 2s infinite;cursor:pointer}
@keyframes bounce{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(8px)}}

/* Page hero (inner pages, shorter) */
.page-hero{padding:8rem 0 4rem;background:linear-gradient(135deg, var(--color-bg-dark) 0%, #162447 50%, var(--color-primary) 100%);color:var(--color-white);text-align:center}
.page-hero h1{color:var(--color-white)}
.page-hero p{color:rgba(255,255,255,.8);max-width:600px;margin:1rem auto 0}

/* --- Cards --- */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem}
.card{background:var(--color-white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .3s,box-shadow .3s;border:1px solid var(--color-border)}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.card-img{width:100%;height:220px;object-fit:cover;background:var(--color-bg-alt)}
.card-body{padding:1.5rem}
.card-body h3{margin-bottom:.5rem}
.card-body p{color:var(--color-text-light);font-size:.95rem;margin-bottom:1rem}

/* --- About section --- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center}
.about-img{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg)}
.about-text h2{margin-bottom:1.5rem}
.about-text p{margin-bottom:1rem;color:var(--color-text-light)}

/* --- Features list --- */
.feature-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem}
.feature-item{text-align:center;padding:2rem}
.feature-icon{width:64px;height:64px;margin:0 auto 1rem;background:var(--color-bg-alt);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem}
.feature-item h3{margin-bottom:.5rem}
.feature-item p{color:var(--color-text-light);font-size:.95rem}

/* --- Certifications --- */
.cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem;max-width:800px;margin:0 auto}
.cert-item{text-align:center;padding:2rem;background:var(--color-bg-alt);border-radius:var(--radius)}
.cert-item img{height:100px;width:auto;margin:0 auto 1rem;object-fit:contain}
.cert-item p{font-weight:600;color:var(--color-dark);margin-bottom:0}

/* --- Product detail --- */
.product-variant{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:start;padding:3rem 0;border-bottom:1px solid var(--color-border)}
.product-variant:last-child{border-bottom:none}
.product-variant:nth-child(even){direction:rtl}
.product-variant:nth-child(even) .variant-content{direction:ltr}
.variant-content h2{color:var(--color-primary);margin-bottom:1rem}
.variant-content h4{color:var(--color-accent);margin:1.25rem 0 .5rem;text-transform:uppercase;font-size:.85rem;letter-spacing:.05em}
.variant-content p{color:var(--color-text-light)}
.variant-img img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow-md);background:var(--color-bg-alt)}
.variant-dim{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1rem}
.variant-dim img{width:100%;border-radius:6px;box-shadow:var(--shadow-sm)}

/* --- Contact --- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:start}
.contact-addresses{display:flex;flex-direction:column;gap:1.5rem}
.contact-card{background:var(--color-bg-alt);padding:1.5rem;border-radius:var(--radius);border-left:4px solid var(--color-accent)}
.contact-card h4{margin-bottom:.5rem}
.contact-card p{color:var(--color-text-light);margin-bottom:0;font-size:.95rem}
.contact-info-item{display:flex;align-items:center;gap:.75rem;margin-bottom:1rem}
.contact-info-icon{width:40px;height:40px;background:var(--color-primary);color:var(--color-white);border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:1.1rem}

/* --- Video grid --- */
.video-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}
.video-card{background:var(--color-white);padding:.75rem;border-radius:var(--radius);box-shadow:var(--shadow-sm);border:1px solid var(--color-border)}

/* --- Location map --- */
.location-section{background:var(--color-bg-alt)}

/* --- Footer --- */
.footer{background:var(--color-bg-dark);color:rgba(255,255,255,.7);padding:4rem 0 2rem}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:3rem;margin-bottom:3rem}
.footer-logo img{height:36px;width:auto;margin-bottom:1rem;filter:brightness(0) invert(1)}
.footer h4{color:var(--color-white);margin-bottom:1rem;font-size:1rem}
.footer p,.footer a{font-size:.9rem;line-height:1.8}
.footer a{color:rgba(255,255,255,.6)}
.footer a:hover{color:var(--color-accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:1.5rem;text-align:center;font-size:.85rem}

/* --- Responsive --- */
@media(max-width:1024px){
  .about-grid{grid-template-columns:1fr;gap:2rem}
  .contact-grid{grid-template-columns:1fr;gap:2rem}
  .product-variant{grid-template-columns:1fr;gap:2rem}
  .product-variant:nth-child(even){direction:ltr}
}

@media(max-width:768px){
  h1{font-size:2rem}
  h2{font-size:1.5rem}
  .hero h1{font-size:2rem}
  .hero .tagline{font-size:1rem}
  .hero-logo img{height:44px}
  .nav-links{position:fixed;top:var(--nav-height);left:0;right:0;background:var(--color-white);flex-direction:column;padding:1.5rem;gap:1rem;border-bottom:1px solid var(--color-border);transform:translateY(-120%);transition:transform .3s;box-shadow:var(--shadow-md)}
  .nav-links.open{transform:translateY(0);display:flex}
  .nav-links .lang-toggle{margin-top:.5rem}
  .nav-toggle{display:flex}
  .section{padding:3rem 0}
  .footer-grid{grid-template-columns:1fr;gap:2rem}
  .cert-grid{grid-template-columns:1fr 1fr}
  .feature-list{grid-template-columns:1fr 1fr}
}

@media(max-width:480px){
  .cert-grid{grid-template-columns:1fr}
  .feature-list{grid-template-columns:1fr}
  .variant-dim{grid-template-columns:1fr}
}