/* --- VARIABLES --- */
:root {
    --c-primary: #004E98;       /* Brand Blue */
    --c-primary-dark: #003366;  /* Dark Blue */
    --c-accent: #EBF5FF;        /* Light Accent */
    --c-bg-body: #FFFFFF;
    --c-bg-footer: #0F172A;
    --c-text-main: #0F172A;
    --c-text-muted: #64748B;
    --c-border: #E2E8F0;
    --font-stack: 'Inter', system-ui, -apple-system, sans-serif;
}

/* --- RESET & BASE --- */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: var(--font-stack);
    background-color: var(--c-bg-body);
    color: var(--c-text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; transition: 0.2s ease; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* --- TYPOGRAPHY --- */
h1, h2, h3, h4, h5 { font-weight: 700; letter-spacing: -0.02em; line-height: 1.2; color: var(--c-text-main); }
h1 { font-size: 3.5rem; margin-bottom: 1.5rem; }
h2 { font-size: 2.5rem; margin-bottom: 1rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.75rem; }
p { margin-bottom: 1.5rem; font-size: 1.05rem; color: #334155; }

/* --- UTILITIES --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; position: relative; }
.section-padding { padding: 6rem 0; }
.text-center { text-align: center; }
.bg-alt { background-color: #F8FAFC; border-top: 1px solid var(--c-border); border-bottom: 1px solid var(--c-border); }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }

/* --- BUTTONS --- */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 4px;
    cursor: pointer;
    text-align: center;
}
.btn-primary {
    background-color: var(--c-primary);
    color: #ffffff !important; /* Force white text */
    border: 1px solid var(--c-primary);
}
.btn-primary:hover { background-color: var(--c-primary-dark); border-color: var(--c-primary-dark); }

.btn-secondary {
    background-color: transparent;
    color: var(--c-primary);
    border: 2px solid var(--c-primary);
}
.btn-secondary:hover { background-color: var(--c-accent); }

/* --- HEADER & NAV --- */
header {
    background-color: #FFFFFF;
    padding: 1rem 0;
    border-bottom: 1px solid var(--c-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}
nav { display: flex; justify-content: space-between; align-items: center; }
.logo-desktop { display: block; max-height: 50px; width: auto; }
.logo-mobile { display: none; max-height: 40px; width: auto; }
.nav-links { display: flex; gap: 2rem; align-items: center; }
.nav-links a { color: var(--c-text-muted); font-size: 0.95rem; font-weight: 600; }
.nav-links a:hover { color: var(--c-primary); }

/* Mobile Menu Button */
.mobile-toggle { display: none; cursor: pointer; font-size: 1.5rem; color: var(--c-primary); }

/* --- HERO SECTION (Split Layout) --- */
.hero { padding: 5rem 0; background: #fff; overflow: hidden; }
.hero-grid { 
    display: grid; 
    grid-template-columns: 1.2fr 0.8fr; /* Text gets more space, Visual gets less */
    gap: 4rem; 
    align-items: center; 
}
.hero-content { max-width: 100%; }
.hero-visual {
    position: relative;
    height: 400px;
    background-image: radial-gradient(var(--c-primary) 1px, transparent 1px);
    background-size: 30px 30px; /* Creates a dot grid */
    opacity: 0.2;
    border: 1px solid var(--c-border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}
/* Abstract "Node" styling overlay */
.hero-visual::after {
    content: '';
    position: absolute;
    width: 60%;
    height: 60%;
    border: 2px solid var(--c-primary);
    border-radius: 50%;
    opacity: 0.5;
}
.hero-visual::before {
    content: '';
    position: absolute;
    width: 30%;
    height: 30%;
    background: var(--c-primary);
    border-radius: 50%;
    opacity: 0.1;
}

.proof-line { 
    border-left: 4px solid var(--c-primary); 
    padding-left: 1.5rem; 
    margin-bottom: 2.5rem; 
    font-weight: 600;
    color: var(--c-text-main);
    background: #F8FAFC;
    padding: 1rem 1rem 1rem 1.5rem;
    border-radius: 0 4px 4px 0;
}
.hero-btns { display: flex; gap: 1rem; }

/* --- CARDS --- */
.card {
    background-color: #fff;
    border: 1px solid var(--c-border);
    padding: 2.5rem;
    border-radius: 6px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}
.card:hover { transform: translateY(-3px); border-color: var(--c-primary); }
.card-label { 
    font-size: 0.75rem; 
    text-transform: uppercase; 
    letter-spacing: 1px; 
    color: var(--c-primary); 
    font-weight: 700; 
    display: block; 
    margin-bottom: 0.75rem;
    background: var(--c-accent);
    padding: 4px 8px;
    width: fit-content;
    border-radius: 4px;
}

/* --- STATS GRID --- */
.stats-grid { 
    display: grid; 
    grid-template-columns: repeat(4, 1fr); 
    gap: 2rem; 
    border-top: 1px solid var(--c-border); 
    padding-top: 3rem; 
    margin-top: 4rem; 
}
.stat-box h3 { font-size: 3rem; color: var(--c-primary); margin-bottom: 0rem; }
.stat-box p { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 1px; color: var(--c-text-muted); font-weight: 600; }

/* --- PROCESS --- */
.process-item {
    padding-left: 2rem;
    border-left: 3px solid var(--c-border);
    padding-bottom: 3rem;
    position: relative;
}
.process-item:last-child { border-left: none; }
.process-number {
    position: absolute;
    left: -1.1rem;
    top: 0;
    background: var(--c-primary);
    color: white;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    text-align: center;
    line-height: 2rem;
    font-weight: bold;
}

/* --- FORMS --- */
input, textarea, select {
    width: 100%;
    padding: 1rem;
    background: #FFFFFF;
    border: 1px solid #CBD5E1;
    color: var(--c-text-main);
    margin-bottom: 1rem;
    font-family: inherit;
    border-radius: 4px;
}
input:focus, textarea:focus { outline: 2px solid var(--c-primary); border-color: var(--c-primary); }

/* --- FOOTER --- */
footer { padding: 4rem 0; background-color: var(--c-bg-footer); color: #94A3B8; font-size: 0.9rem; }
footer h4 { color: white; }
footer a { color: #94A3B8; }
footer a:hover { color: white; }

/* --- RESPONSIVE --- */
@media (max-width: 900px) {
    h1 { font-size: 2.5rem; }
    .hero-grid { grid-template-columns: 1fr; gap: 2rem; }
    .hero-visual { display: none; } /* Hide abstract visual on mobile to save space */
    .grid-2, .grid-3 { grid-template-columns: 1fr; gap: 2rem; }
    
    /* Stats Grid fix */
    .stats-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
    
    /* Mobile Menu Logic */
    .mobile-toggle { display: block; }
    .nav-links {
        display: none; /* Hidden by default */
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 2rem;
        border-bottom: 1px solid var(--c-border);
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    }
    .nav-links.active { display: flex; }
    .nav-links a { font-size: 1.1rem; padding: 0.5rem 0; }
    
    .logo-desktop { display: none; }
    .logo-mobile { display: block; }
}