/* ==========================================================================
   CSS Variables & Reset
   ========================================================================== */
   :root {
    /* Premium Blue Palette */
    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-200: #bfdbfe;
    --blue-300: #93c5fd;
    --blue-400: #60a5fa;
    --blue-500: #3b82f6; /* Primary */
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;
    --blue-800: #1e40af;
    --blue-900: #1e3a8a; /* Navy background */
    --blue-950: #172554;
    
    /* Grays / Neutrals */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Semantic Colors */
    --success: #10b981;
    --danger: #ef4444;
    
    /* Design Tokens */
    --font-main: 'Inter', sans-serif;
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --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-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-blue: 0 10px 15px -3px rgba(59, 130, 246, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--gray-800);
    line-height: 1.6;
    background-color: var(--gray-50);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.text-center { text-align: center; }
.text-blue { color: var(--blue-600); }
.text-white { color: #ffffff; }
.text-gray-400 { color: var(--gray-400); }
.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }
.w-full { width: 100%; }
.bg-light { background-color: #ffffff; }

.section {
    padding: 6rem 0;
}

.section-header {
    max-width: 600px;
    margin: 0 auto 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.section-header p {
    color: var(--gray-500);
    font-size: 1.125rem;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--blue-600), var(--blue-700));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-blue);
    background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
}

.btn-outline {
    background: transparent;
    color: var(--blue-100);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
    color: white;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    border-radius: 10px;
}

/* ==========================================================================
   Navbar
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    box-shadow: var(--shadow-sm);
}

.navbar.scrolled .logo,
.navbar.scrolled .nav-links a,
.navbar.scrolled .mobile-menu-btn {
    color: var(--gray-900);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
    letter-spacing: -0.5px;
}

.logo-icon {
    width: 28px;
    height: 28px;
}

.navbar.scrolled .logo-icon {
    color: var(--blue-600);
}

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

.nav-links a {
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: white;
}

.navbar.scrolled .nav-links a {
    color: var(--gray-600);
}

.navbar.scrolled .nav-links a:hover {
    color: var(--blue-600);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    cursor: pointer;
}

.mobile-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: white;
    padding: 1rem 2rem;
    box-shadow: var(--shadow-md);
}

.mobile-nav.active {
    display: block;
}

.mobile-nav-links li {
    margin: 1rem 0;
}

.mobile-nav-links a {
    color: var(--gray-800);
    font-weight: 500;
    display: block;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    position: relative;
    padding: 12rem 0 6rem;
    background-color: var(--blue-950);
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(59, 130, 246, 0.15) 0%, transparent 50%);
    overflow: hidden;
    color: white;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(59, 130, 246, 0.2);
    border: 1px solid rgba(96, 165, 250, 0.3);
    color: var(--blue-200);
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero h1 span {
    color: var(--blue-400);
}

.hero p {
    font-size: 1.25rem;
    color: var(--gray-300);
    margin-bottom: 2.5rem;
    max-width: 90%;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 2rem;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--gray-300);
}

.hero-image-wrapper {
    position: relative;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: var(--transition);
}

.hero-image-wrapper:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.hero-image {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    display: block;
    border: 4px solid rgba(255, 255, 255, 0.1);
}

.glass-effect {
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0));
    backdrop-filter: blur(10px);
    border-radius: 24px;
    z-index: -1;
}

/* ==========================================================================
   Problem & Solution Section
   ========================================================================== */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.card {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 3rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
}

.card h3 {
    font-size: 1.5rem;
    margin: 1.5rem 0;
    color: var(--gray-900);
}

.card-icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon-wrapper i {
    width: 30px;
    height: 30px;
}

.danger-bg {
    background-color: #fee2e2;
    color: var(--danger);
}

.primary-bg {
    background-color: var(--blue-100);
    color: var(--blue-600);
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    color: var(--gray-600);
}

.card-danger .feature-list i {
    color: var(--danger);
}

.card-primary .feature-list i {
    color: var(--success);
}

.card-primary {
    border: 2px solid var(--blue-500);
    box-shadow: var(--shadow-blue);
}

/* ==========================================================================
   Features Section
   ========================================================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--blue-300);
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: var(--blue-50);
    color: var(--blue-600);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-icon i {
    width: 24px;
    height: 24px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.feature-card p {
    color: var(--gray-600);
    font-size: 0.95rem;
}

/* ==========================================================================
   CTA Section
   ========================================================================== */
.cta-section {
    background-color: var(--blue-900);
    color: white;
    position: relative;
    overflow: hidden;
}

.cta-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-section p {
    color: var(--blue-200);
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.125rem;
}

.cta-pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(59, 130, 246, 0); }
    100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: var(--gray-900);
    color: var(--gray-400);
    padding: 4rem 0 2rem;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    color: white;
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
}

.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-col ul a:hover {
    color: white;
}

.brand-col p {
    margin-top: 1rem;
    max-width: 300px;
}

.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: 2rem;
    text-align: center;
    font-size: 0.875rem;
}

/* ==========================================================================
   Animations & Responsive
   ========================================================================== */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 {
    transition-delay: 0.2s;
}

@media (max-width: 992px) {
    .hero-container, .comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .hero {
        padding: 8rem 0 4rem;
        text-align: center;
    }
    
    .hero p {
        margin: 0 auto 2rem;
    }

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

    .hero-stats {
        justify-content: center;
        margin-bottom: 3rem;
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-links, .nav-actions {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }

    .section {
        padding: 4rem 0;
    }
}