/* VirexaCore Technologies - Premium Corporate Design System */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Color Palette - Premium, Trustworthy, Dynamic */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc; /* Cool gray - very light */
    --text-primary: #1e293b; /* Slate 800 */
    --text-secondary: #475569; /* Slate 600 */
    --text-muted: #94a3b8; /* Slate 400 */
    
    /* Brand Colors */
    --accent: #4f46e5; /* Indigo 600 - Dynamic Blue/Purple */
    --accent-dark: #4338ca; /* Indigo 700 */
    --accent-light: #818cf8; /* Indigo 400 */
    --accent-glow: rgba(79, 70, 229, 0.15);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%); /* Indigo to Violet */
    --gradient-surface: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    
    /* UI Elements */
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-glow: 0 0 15px rgba(79, 70, 229, 0.2);
    
    /* Spacing */
    --space-sm: 0.75rem;
    --space-md: 1.5rem;
    --space-lg: 3rem;
    --space-xl: 5rem;
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
}

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

body {
    font-family: var(--font-primary);
    font-family: var(--font-primary);
    background: linear-gradient(180deg, #ffffff 0%, #f0f4ff 100%) fixed; /* Soothing light gradient */
    color: var(--text-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

ul {
    list-style: none;
}

/* Layout Utilities */
.container {
    max-width: 1200px; /* Slightly wider for modern feel */
    margin: 0 auto;
    padding: 0 var(--space-md);
}

section {
    padding: var(--space-xl) 0;
    position: relative;
}

.bg-secondary {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

/* Typography Enhancements */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }

p { 
    margin-bottom: var(--space-md); 
    color: var(--text-secondary);
    font-size: 1.05rem; 
}

.lead {
    font-size: 1.25rem;
    max-width: 45ch;
    color: var(--text-secondary);
}

/* Buttons - Premium Feel */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    background: var(--gradient-primary); /* Gradient background */
    color: white;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-md);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

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

.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.8rem 1.7rem; /* Compelnsate for border */
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background-color: rgba(79, 70, 229, 0.05);
}

/* Header & Nav */
header {
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.85); /* Proper glassmorphism background */
    backdrop-filter: blur(12px);
    z-index: 1000;
    transition: box-shadow 0.3s ease;
}

header.scrolled {
    box-shadow: var(--shadow-sm);
}

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

.logo {
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent; /* Gradient Text Logo */
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
    border-radius: 2px;
}

.nav-links a:hover::after, .nav-links a.active::after {
    width: 100%;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

/* Cards & Grid Items */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-light);
}

.card h3 {
    color: var(--accent);
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

/* Forms - Modern & Accessible */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-input, .form-textarea {
    width: 100%;
    padding: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all 0.2s ease;
    background-color: #fafafa;
}

.form-input:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow); /* Glow effect */
    background-color: white;
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* Alert / Feedback Messages */
.alert {
    padding: 1rem;
    border-radius: var(--radius-sm);
    margin-top: 1rem;
    font-size: 0.95rem;
    display: none; /* Hidden by default */
}

.alert-success {
    background-color: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background-color: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* Footer */
footer {
    background-color: #f1f5f9; /* Slightly darker than secondary */
    padding: var(--space-xl) 0 var(--space-lg);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.footer-col a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: color 0.2s;
    display: inline-block;
    padding: 2px 0;
}

.footer-col a:hover {
    color: var(--accent);
    transform: translateX(4px);
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Hero Section Specifics */
.hero {
    display: flex;
    align-items: center;
    padding: calc(var(--space-xl) * 1.5) 0;
    background: radial-gradient(circle at top right, rgba(79, 70, 229, 0.05), transparent 40%),
                radial-gradient(circle at bottom left, rgba(124, 58, 237, 0.05), transparent 40%);
}

.hero h1 {
    font-size: 3.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
}

/* Button Loading State */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn-loading::after {
    content: "";
    position: absolute;
    width: 1.25em;
    height: 1.25em;
    border: 2px solid white;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 0.8s linear infinite;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: white;
        flex-direction: column;
        gap: 0;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        padding: 0.5rem 0;
    }

    .nav-links a {
        padding: 1rem 2rem;
    }
    
    .nav-links a::after {
        display: none;
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        padding: var(--space-xl) 0;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        margin-left: auto;
        margin-right: auto;
    }
}