/* 
   Autonomous Defenses - Cyber-Tactical Design System 
   Aesthetic: Dark, Secure, Professional, High-Tech
*/

:root {
    /* Colors */
    --bg-dark: #050505;
    --bg-panel: #0f1216;
    --bg-card: rgba(20, 25, 30, 0.7);
    
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent-primary: #00f3ff; /* Electric Blue - Tech/Trust */
    --accent-secondary: #ff4500; /* Safety Orange - Alert/Action */
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    
    --border-color: #334155;
    --border-glow: rgba(0, 243, 255, 0.3);

    /* Typography */
    --font-heading: 'Orbitron', 'Chakra Petch', sans-serif; /* Tactical/Tech */
    --font-body: 'Inter', system-ui, -apple-system, sans-serif; /* Professional/Readable */

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;

    /* Effects */
    --shadow-glow: 0 0 15px rgba(0, 243, 255, 0.15);
    --glass-blur: blur(10px);
    --transition-fast: 0.2s ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        linear-gradient(rgba(5, 5, 5, 0.95), rgba(5, 5, 5, 0.95)),
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%231e293b' fill-opacity='0.2'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 3.5rem; line-height: 1.1; }
h2 { font-size: 2.5rem; color: var(--accent-primary); }
h3 { font-size: 1.75rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: #fff;
    text-shadow: 0 0 8px var(--accent-primary);
}

/* Utilities */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.text-center { text-align: center; }
.text-accent { color: var(--accent-primary); }
.text-warning { color: var(--accent-secondary); }

/* Components */

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-heading);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}

.btn-primary {
    background-color: rgba(0, 243, 255, 0.1);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.btn-primary:hover {
    background-color: var(--accent-primary);
    color: var(--bg-dark);
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.4);
}

.btn-secondary {
    background-color: rgba(255, 69, 0, 0.1);
    border-color: var(--accent-secondary);
    color: var(--accent-secondary);
}

.btn-secondary:hover {
    background-color: var(--accent-secondary);
    color: #fff;
    box-shadow: 0 0 20px rgba(255, 69, 0, 0.4);
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    backdrop-filter: var(--glass-blur);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 20px; height: 20px;
    border-top: 2px solid var(--accent-primary);
    border-left: 2px solid var(--accent-primary);
    opacity: 0.5;
}

.card::after {
    content: '';
    position: absolute;
    bottom: 0; right: 0; width: 20px; height: 20px;
    border-bottom: 2px solid var(--accent-primary);
    border-right: 2px solid var(--accent-primary);
    opacity: 0.5;
}

.card:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(5, 5, 5, 0.9);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 1rem 0;
    backdrop-filter: blur(10px);
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.1em;
}

.logo span { color: var(--accent-primary); }

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-links a {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 80px; /* Navbar offset */
    background: radial-gradient(circle at center, rgba(0, 243, 255, 0.05) 0%, transparent 70%);
}

.hero-content {
    max-width: 800px;
    text-align: center;
    z-index: 1;
}

.hero h1 {
    text-shadow: 0 0 20px rgba(0, 0, 0, 0.8);
    margin-bottom: var(--spacing-lg);
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Section Styles */
section {
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title h2 {
    display: inline-block;
    border-bottom: 2px solid var(--accent-secondary);
    padding-bottom: var(--spacing-xs);
}

/* Grid */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

/* Footer */
footer {
    background: var(--bg-panel);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.copyright {
    margin-top: var(--spacing-lg);
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .nav-links {
        display: none; /* Mobile menu to be implemented if needed, simple stack for now */
    }
}