/* ADTEC DIGITAL - Main Stylesheet */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg-dark: #1a1a2e; --bg-darker: #0f0f1e; --bg-section: #16213e;
  --bg-card: #1e2a4a; --accent-blue: #4a90d9; --accent-light: #6db3f2;
  --text-white: #f0f0f0; --text-gray: #b0b8c8; --text-muted: #7a8599;
  --border-color: #2a3a5c; --nav-height: 80px;
}
html { scroll-behavior: smooth; }
body { font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif; background: var(--bg-dark); color: var(--text-white); line-height: 1.6; overflow-x: hidden; }
a { color: var(--accent-light); text-decoration: none; transition: color 0.2s; }
a:hover { color: #fff; }
img { max-width: 100%; height: auto; }

.navbar { position: fixed; top: 0; left: 0; right: 0; height: var(--nav-height); background: rgba(15,15,30,0.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border-color); z-index: 1000; display: flex; align-items: center; justify-content: space-between; padding: 0 40px; }
.nav-logo img { height: 50px; width: auto; }
.nav-logo .logo-placeholder { height: 50px; display: flex; align-items: center; font-size: 1.4rem; font-weight: 700; color: var(--text-white); letter-spacing: 1px; }
.nav-links { display: flex; list-style: none; gap: 8px; align-items: center; }
.nav-links li a { color: var(--text-gray); font-size: 0.9rem; font-weight: 500; text-transform: uppercase; letter-spacing: 1.5px; padding: 8px 16px; border-radius: 4px; transition: all 0.2s; display: block; }
.nav-links li a:hover, .nav-links li a.active { color: #fff; background: rgba(74,144,217,0.15); }
.nav-dropdown { position: relative; }
.dropdown-toggle { cursor: pointer; }
.nav-dropdown .dropdown-menu { display: none; position: absolute; top: 100%; left: 0; background: var(--bg-darker); border: 1px solid var(--border-color); border-radius: 6px; min-width: 280px; padding: 8px 0; margin-top: 4px; box-shadow: 0 10px 40px rgba(0,0,0,0.5); }
.nav-dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu a { display: block; padding: 10px 20px; color: var(--text-gray); font-size: 0.85rem; text-transform: none; letter-spacing: 0.5px; }
.dropdown-menu a:hover { background: rgba(74,144,217,0.1); color: #fff; }
.mobile-toggle { display: none; background: none; border: none; color: var(--text-white); font-size: 1.8rem; cursor: pointer; padding: 4px; }

.hero { position: relative; min-height: 85vh; display: flex; align-items: center; justify-content: center; text-align: center; padding: 120px 40px 80px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(10,10,26,0.85) 0%, rgba(26,26,62,0.8) 40%, rgba(13,27,42,0.85) 100%), url('../images/hero-bg.jpg') center/cover no-repeat; z-index: 0; }
.hero-bg::after { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 20% 50%, rgba(74,144,217,0.08) 0%, transparent 60%), radial-gradient(ellipse at 80% 20%, rgba(74,144,217,0.05) 0%, transparent 50%); }
.hero-bg::before { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(74,144,217,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(74,144,217,0.03) 1px, transparent 1px); background-size: 60px 60px; }
.hero-content { position: relative; z-index: 1; max-width: 900px; }
.hero h1 { font-size: 3rem; font-weight: 700; line-height: 1.15; margin-bottom: 16px; text-transform: uppercase; letter-spacing: 2px; }
.hero h1 span { display: block; color: var(--accent-blue); }
.hero .subtitle { font-size: 1.2rem; color: var(--text-gray); font-style: italic; margin-bottom: 40px; }
.btn { display: inline-block; padding: 14px 36px; background: var(--accent-blue); color: #fff; font-weight: 600; text-transform: uppercase; letter-spacing: 1.5px; border-radius: 4px; font-size: 0.9rem; transition: all 0.3s; border: none; cursor: pointer; }
.btn:hover { background: var(--accent-light); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(74,144,217,0.3); }

.page-header { padding: 140px 40px 60px; text-align: center; background: linear-gradient(135deg, #0a0a1a 0%, #1a1a3e 50%, #0d1b2a 100%); border-bottom: 1px solid var(--border-color); }
.page-header h1 { font-size: 2.4rem; font-weight: 700; text-transform: uppercase; letter-spacing: 2px; margin-bottom: 8px; }
.page-header h1 span { color: var(--accent-blue); }
.page-header .page-subtitle { color: var(--text-gray); font-size: 1.05rem; max-width: 700px; margin: 0 auto; }

.section { padding: 80px 40px; }
.section-alt { background: var(--bg-section); }
.container { max-width: 1200px; margin: 0 auto; }
.section-title { font-size: 1.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 12px; }
.section-title span { color: var(--accent-blue); }
.section-desc { color: var(--text-gray); max-width: 700px; margin: 0 auto 50px; font-size: 1rem; }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.contact-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px; padding: 40px; }
.contact-card h3 { font-size: 1.4rem; margin-bottom: 20px; text-transform: uppercase; letter-spacing: 1px; }
.contact-card p, .contact-card address { color: var(--text-gray); font-style: normal; line-height: 1.8; margin-bottom: 16px; }
.contact-card .contact-link { display: block; color: var(--accent-light); margin-bottom: 10px; font-size: 0.95rem; }

.contact-form { display: flex; flex-direction: column; gap: 14px; margin-top: 20px; }
.contact-form input, .contact-form textarea { background: rgba(255,255,255,0.05); border: 1px solid var(--border-color); color: var(--text-white); padding: 12px 16px; border-radius: 4px; font-size: 0.9rem; font-family: inherit; }
.contact-form input::placeholder, .contact-form textarea::placeholder { color: var(--text-muted); }
.contact-form textarea { resize: vertical; min-height: 100px; }
.contact-form .btn { align-self: flex-start; }

.support-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.support-info p { color: var(--text-gray); margin-bottom: 20px; font-size: 1rem; line-height: 1.8; }
.support-links { display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }
.support-links a { display: flex; align-items: center; gap: 8px; padding: 14px 20px; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 6px; color: var(--text-gray); font-size: 0.9rem; transition: all 0.2s; }
.support-links a:hover { border-color: var(--accent-blue); color: #fff; transform: translateX(4px); }
.support-links a .arrow { margin-left: auto; color: var(--accent-blue); }

.product-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; margin-bottom: 60px; }
.product-intro-text h2 { font-size: 1.05rem; color: var(--text-gray); margin-bottom: 20px; line-height: 1.8; font-weight: 400; }
.features-list { list-style: none; margin-top: 20px; }
.features-list li { padding: 6px 0; color: var(--text-gray); font-size: 0.95rem; }
.features-list li::before { content: '\25B8 '; color: var(--accent-blue); font-weight: 700; }
.product-image-placeholder { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px; padding: 30px; text-align: center; min-height: 200px; display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--text-muted); font-size: 0.85rem; }
.placeholder-label { margin-top: 10px; font-style: italic; }
.product-nav { margin-bottom: 40px; padding: 20px; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px; }
.product-nav h4 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin-bottom: 12px; }
.product-nav a { display: block; padding: 8px 0; color: var(--text-gray); font-size: 0.9rem; border-bottom: 1px solid rgba(255,255,255,0.05); }
.product-nav a:last-child { border-bottom: none; }
.product-nav a:hover, .product-nav a.current { color: var(--accent-light); }

.spec-section { margin-bottom: 50px; }
.spec-section h3 { font-size: 1.3rem; margin-bottom: 20px; padding-bottom: 10px; border-bottom: 1px solid var(--border-color); }
.spec-block { margin-bottom: 30px; }
.spec-block h4 { font-size: 1rem; color: var(--accent-light); margin-bottom: 8px; }
.spec-block p { color: var(--text-gray); font-size: 0.9rem; line-height: 1.8; }
.spec-table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.spec-table th, .spec-table td { text-align: left; padding: 12px 16px; border: 1px solid var(--border-color); font-size: 0.88rem; }
.spec-table th { background: var(--bg-card); color: var(--accent-light); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.spec-table td { color: var(--text-gray); }

.carrier-card { display: grid; grid-template-columns: 280px 1fr; gap: 30px; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px; padding: 30px; margin-bottom: 30px; align-items: center; }
.carrier-card h3 { font-size: 1.3rem; margin-bottom: 4px; color: var(--accent-light); }
.carrier-card h4 { font-size: 0.95rem; color: var(--text-gray); font-weight: 400; margin-bottom: 12px; }
.carrier-card p { color: var(--text-gray); font-size: 0.9rem; }

.config-block { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px; padding: 40px; margin-bottom: 40px; }
.config-block h3 { font-size: 1.2rem; margin-bottom: 16px; }
.config-block p { color: var(--text-gray); font-size: 0.95rem; line-height: 1.8; margin-bottom: 16px; }
.parts-list { list-style: none; margin: 16px 0; }
.parts-list li { color: var(--text-gray); font-size: 0.9rem; padding: 4px 0; }
.parts-list li::before { content: '\2022 '; color: var(--accent-blue); }
.applications-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin: 20px 0; }
.app-box { background: rgba(74,144,217,0.08); border: 1px solid var(--border-color); border-radius: 6px; padding: 14px 20px; color: var(--text-gray); font-size: 0.9rem; text-align: center; }

.downloads-section { margin-bottom: 60px; }
.downloads-section h2 { font-size: 1.5rem; margin-bottom: 20px; padding-bottom: 12px; border-bottom: 2px solid var(--accent-blue); }
.product-download-group { margin-bottom: 36px; }
.product-download-group h3 { font-size: 1.15rem; margin-bottom: 6px; color: var(--accent-light); }
.product-status { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 14px; font-style: italic; }
.download-links { display: flex; flex-wrap: wrap; gap: 10px; }
.download-links a { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 4px; color: var(--text-gray); font-size: 0.85rem; transition: all 0.2s; }
.download-links a:hover { border-color: var(--accent-blue); color: #fff; }

.support-content { max-width: 900px; margin: 0 auto; }
.support-content h2 { font-size: 1.4rem; margin: 40px 0 16px; padding-bottom: 8px; border-bottom: 1px solid var(--border-color); }
.support-content h3 { font-size: 1.1rem; margin: 24px 0 12px; color: var(--accent-light); }
.support-content p { color: var(--text-gray); margin-bottom: 16px; line-height: 1.8; font-size: 0.95rem; }
.support-content ul { color: var(--text-gray); margin: 12px 0 20px 24px; font-size: 0.95rem; line-height: 1.8; }

.partner-region { margin-bottom: 50px; }
.partner-region h3 { font-size: 1.2rem; margin-bottom: 20px; padding-bottom: 8px; border-bottom: 1px solid var(--border-color); }
.partners-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.partner-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 6px; padding: 20px; }
.partner-card h4 { font-size: 1rem; margin-bottom: 8px; }
.partner-card p { color: var(--text-gray); font-size: 0.85rem; line-height: 1.6; }

.footer { background: var(--bg-darker); border-top: 1px solid var(--border-color); padding: 50px 40px 30px; }
.footer-content { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
.footer-text { color: var(--text-muted); font-size: 0.8rem; max-width: 600px; line-height: 1.6; }
.footer-social { display: flex; gap: 12px; }
.footer-social a { display: flex; align-items: center; justify-content: center; width: 38px; height: 38px; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 50%; color: var(--text-gray); font-size: 0.85rem; transition: all 0.2s; }
.footer-social a:hover { border-color: var(--accent-blue); color: #fff; }
.footer-bottom { max-width: 1200px; margin: 30px auto 0; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.05); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-bottom p { color: var(--text-muted); font-size: 0.75rem; }
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a { color: var(--text-muted); font-size: 0.75rem; }

@media (max-width: 900px) {
  .nav-links { display: none; position: fixed; top: var(--nav-height); left: 0; right: 0; background: var(--bg-darker); flex-direction: column; padding: 20px; border-bottom: 1px solid var(--border-color); }
  .nav-links.open { display: flex; }
  .mobile-toggle { display: block; }
  .nav-dropdown .dropdown-menu { position: static; box-shadow: none; border: none; padding-left: 16px; }
  .hero h1 { font-size: 2rem; }
  .contact-grid, .support-grid, .product-intro { grid-template-columns: 1fr; }
  .carrier-card { grid-template-columns: 1fr; }
  .section { padding: 50px 20px; }
  .page-header { padding: 120px 20px 40px; }
  .page-header h1 { font-size: 1.8rem; }
  .navbar { padding: 0 20px; }
}
@media (max-width: 600px) {
  .hero { padding: 100px 20px 60px; min-height: 60vh; }
  .hero h1 { font-size: 1.6rem; }
  .partners-grid { grid-template-columns: 1fr; }
  .download-links { flex-direction: column; }
}