/**
 * Core Enterprise AI Infrastructure Architecture Stylesheet
 * Brand Context: B2B Strict Corporate Palette with Deep Blue Interactive Controls
 */

 :root {
    --bg-dark: #07090e;
    --surface-card: #0f131a;
    --border-glow: #161f30;
    --accent-neon: #00ff66; /* Blackwell Tech Highlight */
    --accent-hover: #00cd52;
    --text-primary: #f0f4f8;
    --text-muted: #8ba2b5;
    
    /* Strict Corporate Blue Interactive Elements */
    --btn-blue-base: #111e36;
    --btn-blue-border: #1e3554;
    --btn-blue-hover: #182d52;

    /* Radial Deep Blue Core Viewport Filters */
    --hero-gradient: radial-gradient(100% 100% at 50% 0%, #111e36 0%, #07090e 100%);
    --monster-glow: radial-gradient(100% 100% at 50% 0%, #152642 0%, #0f131a 100%);
}

* { 
    box-sizing: border-box; 
    margin: 0; 
    padding: 0; 
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", Roboto, Helvetica, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container { 
    width: 100%; 
    max-width: 1200px; 
    margin: 0 auto; 
    padding: 0 24px; 
}

span { 
    color: var(--accent-neon); 
}

/* Premium High-Tier Deep Blue Corporate Buttons Configuration */
.btn {
    display: inline-block;
    background-color: var(--btn-blue-base);
    color: var(--text-primary);
    font-weight: 600;
    padding: 16px 36px;
    border-radius: 6px;
    text-decoration: none;
    border: 1px solid var(--btn-blue-border);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: none;
    box-shadow: 0 4px 12px rgba(17, 30, 54, 0.3);
}

.btn:hover { 
    background-color: var(--btn-blue-hover);
    border-color: var(--accent-neon); /* Glow transition execution */
    transform: translateY(-1px); 
    box-shadow: 0 6px 20px rgba(0, 255, 102, 0.15);
}

.btn:active {
    transform: translateY(0);
}

/* Header & Context Navigation Module */
.main-header { 
    padding: 24px 0; 
    border-bottom: 1px solid var(--border-glow); 
    background: rgba(7, 9, 14, 0.8); 
    backdrop-filter: blur(12px); 
    position: sticky; 
    top: 0; 
    z-index: 100; 
}

.header-wrap { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
}

.logo { 
    font-weight: 800; 
    font-size: 1.25rem; 
    letter-spacing: 0.5px; 
}

.nav-links { 
    display: flex; 
    gap: 32px; 
    list-style: none; 
}

.nav-links a { 
    text-decoration: none; 
    color: var(--text-muted); 
    font-size: 0.95rem; 
    font-weight: 500; 
    transition: color 0.2s; 
}

.nav-links a:hover { 
    color: var(--text-primary); 
}

/* Dynamic Language Controllers */
.lang-selector { 
    display: flex; 
    gap: 6px; 
}

.lang-btn { 
    background: transparent; 
    border: 1px solid var(--border-glow); 
    color: var(--text-muted); 
    padding: 6px 10px; 
    font-size: 0.75rem; 
    font-weight: 700; 
    border-radius: 4px; 
    cursor: pointer; 
    transition: all 0.2s; 
}

.lang-btn:hover { 
    border-color: var(--text-primary); 
    color: var(--text-primary); 
}

.lang-btn.active { 
    border-color: var(--accent-neon); 
    color: var(--accent-neon); 
    background: rgba(0, 255, 102, 0.05); 
}

/* Hero Interface with Original True Blue Ambient Glow */
.hero { 
    padding: 160px 0 120px 0; 
    text-align: center; 
    background: var(--bg-dark) var(--hero-gradient) no-repeat top center;
    background-size: 100% 100%;
}

.hero-badge { 
    display: inline-block; 
    padding: 6px 16px; 
    background: rgba(0, 255, 102, 0.08); 
    border: 1px solid rgba(0, 255, 102, 0.2); 
    border-radius: 20px; 
    font-size: 0.85rem; 
    font-weight: 600; 
    color: var(--accent-neon); 
    margin-bottom: 24px; 
    letter-spacing: 0.5px; 
}

.hero h1 { 
    font-size: 3.5rem; 
    font-weight: 800; 
    line-height: 1.15; 
    margin-bottom: 24px; 
    letter-spacing: -1px; 
}

.hero p { 
    font-size: 1.2rem; 
    color: var(--text-muted); 
    max-width: 760px; 
    margin: 0 auto 40px auto; 
}

.hero-sub_cta { 
    display: block; 
    font-size: 0.85rem; 
    color: var(--text-muted); 
    margin-top: 16px; 
}

/* Technical Specification Matrix Grid */
.specs { 
    padding: 100px 0; 
    border-bottom: 1px solid var(--border-glow); 
}

.section-title { 
    text-align: center; 
    font-size: 2.25rem; 
    font-weight: 800; 
    margin-bottom: 60px; 
}

.specs-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); 
    gap: 32px; 
}

.spec-card { 
    background: var(--surface-card); 
    border: 1px solid var(--border-glow); 
    padding: 32px; 
    border-radius: 8px; 
    transition: border-color 0.2s, transform 0.2s; 
}

.spec-card:hover { 
    border-color: rgba(0, 255, 102, 0.3); 
    transform: translateY(-2px);
}

.spec-card h3 { 
    font-size: 1.25rem; 
    margin-bottom: 12px; 
}

.spec-card p { 
    color: var(--text-muted); 
    font-size: 0.95rem; 
}

/* Infrastructure Node Compliance Matrix Area */
.security { 
    padding: 100px 0; 
    background: #0b0e14; 
    border-bottom: 1px solid var(--border-glow); 
}

/* Pricing Grid Architecture with Perfect Button Alignment */
.pricing { 
    padding: 100px 0; 
}

.pricing-grid { 
    display: flex; 
    gap: 32px; 
    justify-content: center; 
    flex-wrap: wrap; 
    margin-top: 48px; 
}

.pricing-card { 
    background: var(--surface-card); 
    border: 1px solid var(--border-glow); 
    padding: 48px 40px; 
    border-radius: 8px; 
    width: 100%; 
    max-width: 440px; 
    display: flex;
    flex-direction: column;
    transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s; 
}

.pricing-card:hover { 
    transform: translateY(-4px); 
    border-color: rgba(0, 255, 102, 0.3); 
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5); 
}

/* Active B2B Card State with Deep Blue Tech Border Glow */
.pricing-card.premium { 
    background: var(--surface-card) var(--monster-glow) no-repeat top center;
    border-color: #1a2a40; 
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3); 
}

.pricing-card.premium:hover { 
    border-color: rgba(0, 255, 102, 0.4);
    box-shadow: 0 12px 40px rgba(0, 255, 102, 0.08); 
}

.pricing-card h3 { 
    font-size: 1.5rem; 
    margin-bottom: 16px; 
}

.price { 
    font-size: 3rem; 
    font-weight: 800; 
    margin-bottom: 32px; 
}

.price span { 
    font-size: 1.1rem; 
    color: var(--text-muted); 
    font-weight: 500; 
}

.pricing-card ul { 
    list-style: none; 
    margin-bottom: 40px; 
}

.pricing-card li { 
    padding: 10px 0; 
    border-bottom: 1px solid rgba(255,255,255,0.03); 
    color: var(--text-muted); 
    font-size: 0.95rem; 
}

.pricing-card li::before { 
    content: "✓ "; 
    color: var(--accent-neon); 
    margin-right: 8px; 
}

.pricing-card .btn {
    display: block;
    text-align: center;
    margin-top: auto; 
}

/* Secure Enterprise Messaging Layer Block with Symmetrical Blue Space Inversion */
.contact { 
    padding: 120px 0; 
    text-align: center; 
    background: var(--bg-dark) var(--hero-gradient) no-repeat top center; 
    background-size: 100% 100%; 
    border-top: 1px solid var(--border-glow); 
}

.contact p { 
    color: var(--text-muted); 
    max-width: 640px; 
    margin: 0 auto 40px auto; 
    font-size: 1.1rem; 
}

/* Sovereign Governance Footer Structures */
.main-footer { 
    padding: 48px 0; 
    border-top: 1px solid var(--border-glow); 
    font-size: 0.85rem; 
    color: var(--text-muted); 
}

.footer-wrap { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    flex-wrap: wrap; 
    gap: 24px; 
}

.footer-disclaimer { 
    font-size: 0.75rem; 
    color: rgba(139, 162, 181, 0.4); 
    margin-top: 24px; 
    line-height: 1.5; 
    text-align: justify; 
}