/* ==========================================================================
   1. CORE RESET & VARIABLES
   ========================================================================== */
:root {
    --color-dark: #212121;
    --color-dark-bg: #1a1a1a;
    --color-accent: #0693e3;
    --color-light-gray: #f4f6f8;
    --color-text-main: #333333;
    --color-text-muted: #666666;
    --font-sans: 'Inter', sans-serif;
    --font-serif: 'Cardo', serif;
}

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

body {
    font-family: var(--font-sans);
    color: var(--color-text-main);
    background-color: #ffffff;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* ==========================================================================
   2. NAVIGATION HEADER
   ========================================================================== */
header {
    background-color: var(--color-dark);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo a {
    text-decoration: none;
    font-size: 22px;
}

.brand-main {
    color: #ffffff;
    font-weight: 700;
}

.brand-sub {
    color: var(--color-accent);
    font-weight: 300;
}

.nav-links a {
    color: #ffffff;
    text-decoration: none;
    margin-left: 25px;
    font-size: 14px;
    font-weight: 600;
    transition: color 0.3s ease;
}

.nav-links a:hover, 
.nav-links a.active {
    color: var(--color-accent);
}

/* ==========================================================================
   3. SPLIT HERO BANNER (Standard Locked Video Dimensions)
   ========================================================================== */
.split-hero {
    background-color: var(--color-dark-bg);
    padding: 80px 0;
    color: #ffffff;
}

.split-hero-flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

/* Typography Adjustments for Split Layout */
.hero-text-side {
    flex: 1;
    text-align: left;
}

.hero-text-side h1 {
    font-family: var(--font-serif);
    font-size: 42px;
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: 15px;
}

.tagline {
    font-size: 22px;
    color: var(--color-accent);
    margin-bottom: 25px;
    font-weight: 300;
}

.lead-text {
    margin-bottom: 35px;
    font-size: 16px;
    color: #cccccc;
    font-weight: 300;
}

/* Video Frame Side and Sizing Rules */
.hero-video-side {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.video-frame-container {
    width: 100%;
    max-width: 560px; /* Standard presentation container window width */
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    background: #000000;
    line-height: 0; /* Clear baseline rendering alignments */
}

.standard-video-player {
    width: 100%;
    height: auto;
    display: block;
}

/* ==========================================================================
   4. INTERACTIVE CTAs / BUTTON SYSTEMS
   ========================================================================== */
.cta-group {
    display: flex;
    justify-content: flex-start;
    gap: 15px;
}

.btn {
    display: inline-block;
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--color-accent);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: #057ec2;
}

.btn-secondary {
    border: 2px solid #ffffff;
    color: #ffffff;
}

.btn-secondary:hover {
    background-color: #ffffff;
    color: var(--color-dark);
}

/* ==========================================================================
   5. FEATURES GRID CONTENT
   ========================================================================== */
.features {
    padding: 80px 0;
    background-color: var(--color-light-gray);
}

.grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: #ffffff;
    padding: 40px 30px;
    border-radius: 6px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    text-align: center;
}

.card-icon {
    font-size: 36px;
    margin-bottom: 15px;
}

.feature-card h3 {
    margin-bottom: 15px;
    font-size: 20px;
    color: var(--color-dark);
}

.feature-card p {
    color: var(--color-text-muted);
    font-size: 15px;
}

/* ==========================================================================
   6. GLOBAL STRUCTURAL FOOTER
   ========================================================================== */
footer {
    background-color: var(--color-dark-bg);
    color: #888888;
    padding: 50px 0;
    text-align: center;
    font-size: 14px;
}

.footer-content p {
    margin-bottom: 10px;
}

footer a {
    color: var(--color-accent);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* ==========================================================================
   7. MOBILE RESPONSIVE MEDIA CONTROLS
   ========================================================================== */
@media (max-width: 992px) {
    .split-hero-flex {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }

    .hero-text-side {
        text-align: center;
    }

    .cta-group {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .header-flex {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-links a {
        margin: 0 10px;
    }

    .hero-content h1 {
        font-size: 32px;
    }
    
    .tagline {
        font-size: 20px;
    }
    
    .cta-group {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }

    .btn {
        display: block;
        width: 100%;
        max-width: 280px;
        text-align: center;
    }
}