/* Navigation Bar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: background var(--transition-base);
}

.dark-mode .navbar {
    background: rgba(15, 23, 42, 0.95);
    border-bottom: 1px solid var(--border-dark);
}

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) 0;
}

.navbar-logo {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
}

.navbar-menu {
    display: flex;
    gap: var(--space-xl);
    list-style: none;
    align-items: center;
}

.navbar-link {
    font-weight: 500;
    color: var(--text-dark);
    transition: color var(--transition-base);
    position: relative;
}

.navbar-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-base);
}

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

.dark-mode .navbar-link {
    color: var(--text-light);
}

.dark-mode-toggle {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    transition: transform var(--transition-base);
}

.dark-mode-toggle:hover {
    transform: rotate(180deg);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: var(--text-dark);
}

.dark-mode .mobile-menu-btn {
    color: var(--text-light);
}

/* Hero Section */
.hero {
    padding: var(--space-3xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(37, 99, 235, 0.1), transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(139, 92, 246, 0.1), transparent 50%);
    z-index: -1;
}

.hero-title {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-muted);
    margin-bottom: var(--space-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: var(--space-lg);
    justify-content: center;
    flex-wrap: wrap;
}

/* Features Grid */
.features {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
}

.feature-card {
    text-align: center;
    padding: var(--space-2xl);
    background: var(--bg-lighter);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transition: transform var(--transition-base);
    transform-origin: left;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.dark-mode .feature-card {
    background: var(--bg-darker);
    border: 1px solid var(--border-dark);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--space-lg);
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.feature-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-md);
}

.feature-description {
    color: var(--text-muted);
    margin: 0;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: var(--text-light);
    padding: var(--space-3xl) 0 var(--space-xl);
    margin-top: var(--space-3xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-section h3 {
    margin-bottom: var(--space-lg);
    color: var(--text-light);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    color: var(--text-muted);
    transition: color var(--transition-base);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-dark);
    color: var(--text-muted);
}

/* Responsive Mobile Menu */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }

    .navbar-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-lighter);
        padding: var(--space-lg);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

    .dark-mode .navbar-menu {
        background: var(--bg-darker);
    }

    .navbar-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }
}