/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary-blue: #4A90E2;
    --light-blue: #7FB3E8;
    --dark-blue: #2E5C8A;
    --white: #FAFAFA;
    --off-white: #F5F5F5;
    --black: #1A1A1A;
    --dark-gray: #2D2D2D;
    --light-gray: #E0E0E0;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #4A90E2 0%, #7FB3E8 100%);
    --gradient-dark: linear-gradient(135deg, #2E5C8A 0%, #4A90E2 100%);
    --gradient-light: linear-gradient(135deg, rgba(74, 144, 226, 0.1) 0%, rgba(127, 179, 232, 0.1) 100%);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-family: 'Poppins', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--black);
    background-color: var(--white);
    overflow-x: hidden;
}

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

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--primary-blue);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.logo:hover {
    transform: scale(1.05);
}

.logo i {
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--black);
    font-weight: 500;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-link:hover {
    color: var(--primary-blue);
}

.nav-link:hover::after {
    width: 100%;
}

.btn-demo-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.btn-demo-nav:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--primary-blue);
    border-radius: 3px;
    transition: all var(--transition-base);
}

/* ===== SECTIONS ===== */
section {
    padding: var(--spacing-xl) 0;
}

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

.section-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: var(--gradient-light);
    color: var(--primary-blue);
    border-radius: 50px;
    font-weight: 600;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
    border: 2px solid rgba(74, 144, 226, 0.2);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--dark-gray);
    max-width: 600px;
    margin: 0 auto;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== BUTTONS ===== */
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    background: transparent;
    color: var(--primary-blue);
    text-decoration: none;
    border: 2px solid var(--primary-blue);
    border-radius: 50px;
    font-weight: 600;
    transition: all var(--transition-base);
}

.btn-secondary:hover {
    background: var(--primary-blue);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--dark-gray);
    color: var(--white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-brand .logo {
    color: white;
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    color: var(--light-gray);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--light-gray);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--light-blue);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--light-gray);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .navbar {
        padding: 0;
        box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    }
    
    .nav-container {
        padding: 1.25rem var(--spacing-md);
    }
    
    .logo {
        font-size: 1.5rem;
        font-weight: 900;
    }
    
    .logo i {
        font-size: 1.75rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: white;
        width: 100%;
        padding: var(--spacing-lg) var(--spacing-md);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
        transition: left var(--transition-base);
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        width: 100%;
        text-align: center;
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--off-white);
    }
    
    .nav-menu li:last-child {
        border-bottom: none;
    }
    
    .nav-menu a {
        font-size: 1.1rem;
        padding: 0.75rem 1.5rem;
        display: block;
        width: 100%;
    }
    
    .hamburger {
        display: flex;
        width: 35px;
        height: 35px;
    }
    
    .hamburger span {
        height: 3px;
    }
    
    .nav-cta {
        display: none;
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .navbar {
        box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    }
    
    .nav-container {
        padding: 1rem var(--spacing-sm);
    }
    
    .logo {
        font-size: 1.35rem;
    }
    
    .logo i {
        font-size: 1.5rem;
    }
    
    .nav-menu {
        top: 65px;
        padding: var(--spacing-md);
    }
    
    .nav-menu a {
        font-size: 1rem;
        padding: 0.65rem 1rem;
    }
    
    .hamburger {
        width: 32px;
        height: 32px;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
}