:root {
    --primary: #0A192F; /* Navy Blue */
    --primary-light: #112240;
    --accent: #00D2FF; /* Electric Blue/Cyan */
    --accent-hover: #00b8e6;
    --text-main: #2d3748;
    --text-muted: #718096;
    --bg-light: #F7FAFC;
    --white: #FFFFFF;
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: var(--text-main);
    background-color: var(--white);
    overflow-x: hidden;
}

/* Typography & Utilitas */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--primary);
}
.text-primary-brand { color: var(--primary); }
.text-accent { color: var(--accent); }
.bg-primary-brand { background-color: var(--primary); }
.bg-light-brand { background-color: var(--bg-light); }

/* Buttons */
.btn-accent {
    background-color: var(--accent);
    color: var(--primary);
    font-weight: 600;
    border-radius: 8px;
    padding: 12px 28px;
    transition: all 0.3s ease;
    border: none;
}
.btn-accent:hover {
    background-color: var(--accent-hover);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 210, 255, 0.3);
}
.btn-outline-light {
    border: 2px solid var(--white);
    font-weight: 600;
    padding: 10px 26px;
    border-radius: 8px;
}

/* Navbar */
.navbar {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
.navbar-brand {
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--primary) !important;
}
.nav-link {
    font-weight: 600;
    color: var(--text-main) !important;
    margin: 0 10px;
}
.nav-link:hover { color: var(--accent) !important; }

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    padding: 120px 0 80px;
}
.hero-section h1 { color: var(--white); }
.hero-section .lead { color: #A0AEC0; }

/* Demo Visual Simulation (CSS Only UI) */
.demo-board {
    background: var(--white);
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    color: var(--primary);
    border-top: 5px solid var(--accent);
}
.demo-number-display {
    background: var(--primary-light);
    color: var(--accent);
    font-size: 3.5rem;
    font-weight: 800;
    text-align: center;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 15px;
    letter-spacing: 2px;
    font-family: monospace;
}

/* Cards */
.feature-card, .step-card {
    background: var(--white);
    border-radius: 12px;
    padding: 30px;
    border: 1px solid #E2E8F0;
    transition: all 0.3s ease;
    height: 100%;
}
.feature-card:hover {
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
    border-color: var(--accent);
    transform: translateY(-5px);
}
.feature-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 20px;
}

/* Floating WA */
.floating-wa {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: #25D366;
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
    z-index: 1000;
    transition: all 0.3s ease;
}
.floating-wa:hover {
    background-color: #128C7E;
    color: white;
    transform: scale(1.1);
}

/* Footer */
.footer { background-color: var(--primary-light); color: #CBD5E0; padding: 60px 0 20px; }
.footer h5 { color: var(--white); }
.footer a { color: #CBD5E0; text-decoration: none; }
.footer a:hover { color: var(--accent); }