/* Reset & Base */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
    font-family: 'Helvetica Neue', Helvetica, Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif; 
    background: #ffffff; 
    color: #111111; 
    line-height: 1.6; 
    min-height: 100vh; 
    overflow-x: hidden; 
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* Theme Variables */
:root {
    --bg-main: #ffffff;
    --text-main: #000000;
    --barcode-black: #1a1a1a;
    --scanner-green: #00ff41;
    --scanner-red: #ff003c;
    --gray-light: #f5f5f5;
    --gray-dark: #333333;
    --mono-font: 'Courier New', Courier, monospace;
}

/* Navigation */
.navbar { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    padding: 15px 5%; 
    background: var(--bg-main); 
    border-bottom: 2px solid var(--barcode-black); 
    position: sticky; 
    top: 0; 
    z-index: 100; 
}
.nav-logo { 
    font-size: 24px; 
    font-weight: 900; 
    color: var(--barcode-black);
    font-family: var(--mono-font);
    letter-spacing: -1px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.nav-logo::before {
    content: '||| || | |';
    font-weight: normal;
    letter-spacing: 1px;
}
.nav-links { display: flex; gap: 30px; align-items: center; font-weight: bold; }
.nav-links a { color: var(--text-main); transition: color 0.2s; text-transform: uppercase; font-family: var(--mono-font); font-size: 14px;}
.nav-links a:hover { color: var(--scanner-red); }
.btn-download-nav { 
    padding: 8px 24px; 
    background: var(--barcode-black); 
    color: #fff !important; 
    border-radius: 0; 
    transition: all 0.2s; 
    border: 1px solid var(--barcode-black);
}
.btn-download-nav:hover { 
    background: var(--scanner-green); 
    color: var(--barcode-black) !important;
    border-color: var(--scanner-green);
}

/* Hero Section - Dynamic Barcode */
.hero-wrapper {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-main);
    overflow: hidden;
    padding: 40px 5%;
}

.barcode-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    opacity: 0.1;
    z-index: 0;
    pointer-events: none;
}

.barcode-svg {
    width: 100%;
    height: 100%;
}

.hero-content { 
    z-index: 3; 
    max-width: 1000px; 
    text-align: center;
    background: rgba(255, 255, 255, 0.9);
    padding: 60px 40px;
    border: 4px solid var(--barcode-black);
    position: relative;
}

/* Scanner Line Animation */
.hero-content::after {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 3px;
    background: var(--scanner-red);
    box-shadow: 0 0 15px var(--scanner-red), 0 0 30px var(--scanner-red);
    animation: scanLine 4s infinite linear;
    z-index: 10;
    pointer-events: none;
}

@keyframes scanLine {
    0% { top: 0; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

/* Creative Barcode Plane Graphic */
.barcode-plane-graphic {
    margin: 0 auto 30px;
    width: 200px;
    height: 120px;
    position: relative;
}

.hero h1 { 
    font-size: 38px; /* Adjusted for longer title */
    margin-bottom: 20px; 
    line-height: 1.3; 
    color: var(--barcode-black);
    font-weight: 900;
    text-transform: uppercase;
}
.hero p { 
    font-size: 18px; 
    margin-bottom: 40px; 
    color: var(--gray-dark);
    font-family: var(--mono-font);
}

.hero-buttons { display: flex; gap: 20px; justify-content: center; margin-bottom: 40px; flex-wrap: wrap; }
.btn-barcode { 
    padding: 15px 35px; 
    font-size: 16px; 
    font-weight: bold; 
    background: #fff; 
    color: var(--barcode-black); 
    border: 3px solid var(--barcode-black);
    font-family: var(--mono-font);
    text-transform: uppercase;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
}
.btn-barcode::before {
    content: '|||| | || |||';
    position: absolute;
    bottom: -15px; left: 50%;
    transform: translateX(-50%);
    font-size: 12px;
    opacity: 0;
    transition: all 0.2s;
}
.btn-barcode:hover { 
    background: var(--barcode-black); 
    color: #fff; 
    padding-bottom: 25px;
    padding-top: 5px;
}
.btn-barcode:hover::before {
    bottom: 2px;
    opacity: 1;
}

.btn-barcode-solid { 
    padding: 15px 35px; 
    font-size: 16px; 
    font-weight: bold; 
    background: var(--barcode-black); 
    color: #fff; 
    border: 3px solid var(--barcode-black);
    font-family: var(--mono-font);
    text-transform: uppercase;
    transition: all 0.2s;
}
.btn-barcode-solid:hover { 
    background: var(--scanner-green); 
    color: var(--barcode-black); 
    border-color: var(--scanner-green);
}

.hero-images { 
    display: flex; 
    justify-content: center; 
    gap: 20px; 
    z-index: 3; 
    align-items: flex-end; 
    margin-top: 30px;
}
.hero-images img { 
    max-width: 28%; 
    border: 2px solid var(--barcode-black);
    filter: grayscale(100%);
    transition: all 0.3s; 
}
.hero-images img:hover { 
    filter: grayscale(0%);
    transform: scale(1.05);
    box-shadow: 10px 10px 0 var(--barcode-black);
}

/* Features Section */
.features { padding: 100px 5%; background: var(--gray-light); border-top: 2px solid var(--barcode-black); border-bottom: 2px solid var(--barcode-black); }
.section-title { text-align: center; font-size: 36px; margin-bottom: 60px; color: var(--barcode-black); font-weight: 900; text-transform: uppercase; }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; max-width: 1200px; margin: 0 auto; }

.feature-card { 
    padding: 40px 30px; 
    text-align: center; 
    background: #fff;
    border: 2px solid var(--barcode-black);
    transition: all 0.2s; 
    position: relative;
}
.feature-card::after {
    content: '|| | ||| |';
    position: absolute;
    bottom: 10px; right: 15px;
    font-family: var(--mono-font);
    font-size: 12px;
    color: #ccc;
}
.feature-card:hover { 
    transform: translate(-5px, -5px); 
    box-shadow: 8px 8px 0 var(--barcode-black); 
}
.feature-card h3 { color: var(--barcode-black); font-size: 22px; margin-bottom: 15px; font-family: var(--mono-font); font-weight: bold; }
.feature-card p { color: var(--gray-dark); }

/* Blog Section */
.blog { padding: 100px 5%; background: #fff; }
.blog-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; max-width: 1100px; margin: 0 auto; }
.blog-card { 
    display: flex; 
    flex-direction: column; 
    background: var(--gray-light);
    border: 2px solid var(--barcode-black);
    transition: all 0.2s;
}
.blog-card:hover { box-shadow: 8px 8px 0 var(--scanner-green); }
.blog-card img { width: 100%; height: 260px; object-fit: cover; border-bottom: 2px solid var(--barcode-black); filter: grayscale(100%); transition: filter 0.3s;}
.blog-card:hover img { filter: grayscale(0%); }
.blog-content { padding: 30px; }
.blog-date { display: inline-block; margin-bottom: 15px; font-size: 14px; color: #fff; background: var(--barcode-black); padding: 2px 8px; font-family: var(--mono-font); }
.blog-content h3 { font-size: 22px; margin-bottom: 15px; color: var(--barcode-black); font-weight: bold; }
.blog-content p { color: var(--gray-dark); margin-bottom: 0; }
.btn-more { 
    display: block; 
    width: 220px; 
    margin: 60px auto 0; 
    text-align: center; 
    padding: 15px; 
    background: var(--barcode-black);
    color: #fff; 
    font-weight: bold; 
    font-family: var(--mono-font);
    text-transform: uppercase;
    transition: all 0.2s; 
}
.btn-more:hover { background: var(--scanner-red); }

/* FAQ Section */
.faq { padding: 100px 5%; max-width: 900px; margin: 0 auto; background: var(--bg-main); margin-bottom: 80px; }
.faq-item { 
    background: #fff; 
    margin-bottom: 20px; 
    padding: 25px 30px; 
    border: 2px solid var(--barcode-black);
    position: relative;
}
.faq-item::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0; width: 6px;
    background: var(--barcode-black);
    transition: background 0.3s;
}
.faq-item:hover::before { background: var(--scanner-green); }
.faq-question { font-size: 18px; font-weight: bold; color: var(--barcode-black); margin-bottom: 12px; font-family: var(--mono-font);}
.faq-question::before { content: 'Q: '; color: var(--scanner-red); }
.faq-answer { color: var(--gray-dark); font-size: 15px; }

/* Footer */
.footer { background: var(--barcode-black); padding: 80px 5% 30px; color: #fff; }
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; max-width: 1200px; margin: 0 auto 50px; }
.footer-col h4 { font-size: 18px; color: #fff; margin-bottom: 25px; font-weight: bold; font-family: var(--mono-font); text-transform: uppercase;}
.footer-col ul li { margin-bottom: 15px; }
.footer-col ul li a { color: #999; transition: color 0.2s; font-family: var(--mono-font); font-size: 14px;}
.footer-col ul li a:hover { color: var(--scanner-green); }
.footer-bottom { text-align: center; padding-top: 30px; border-top: 1px dashed #555; color: #777; font-size: 14px; font-family: var(--mono-font);}

/* Download Page Grid */
.download-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 30px; max-width: 1100px; margin: 60px auto; padding: 0 5%; }
.download-card { padding: 40px 30px; text-align: center; background: #fff; border: 2px solid var(--barcode-black); transition: all 0.2s;}
.download-card:hover { transform: translateY(-5px); box-shadow: 8px 8px 0 var(--barcode-black); }
.download-card h3 { font-size: 22px; margin-bottom: 15px; color: var(--barcode-black); font-family: var(--mono-font); font-weight: bold;}
.download-card p { color: var(--gray-dark); margin-bottom: 30px; font-size: 15px; }
.btn-dl-card { display: inline-block; padding: 12px 30px; background: var(--barcode-black); color: #fff; font-weight: bold; font-family: var(--mono-font); transition: all 0.2s; text-transform: uppercase;}
.btn-dl-card:hover { background: var(--scanner-green); color: var(--barcode-black); }

/* Page specific headers */
.page-header { 
    padding: 100px 5% 60px; 
    text-align: center; 
    background: var(--gray-light);
    border-bottom: 2px solid var(--barcode-black);
    position: relative;
}
.page-header-content {
    position: relative;
    z-index: 2;
    color: var(--barcode-black);
    max-width: 800px;
    margin: 0 auto;
}
.page-header h1 { font-size: 38px; margin-bottom: 20px; font-weight: 900; text-transform: uppercase; line-height: 1.3;}
.page-header p { font-size: 18px; color: var(--gray-dark); font-family: var(--mono-font); }

/* === perf: reduce motion & lower GPU cost === */
.feature-card,
.blog-card,
.hero-content,
.glass-panel,
.pearl-card {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}
.navbar {
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}

/* perf: limit decorative infinite layers on mid/low-end devices */
@media (max-width: 768px) {
    .bubble:nth-child(n+3),
    .tiny-plane:nth-child(n+3),
    .bg-shard:nth-child(n+4),
    .orb:nth-child(n+2) {
        display: none !important;
    }
}