:root {
    --primary-color: #6750A4;
    --on-primary-color: #FFFFFF;
    --secondary-color: #E8DEF8;
    --on-secondary-color: #1D192B;
    --surface-color: #FFFBFE;
    --on-surface-color: #1C1B1F;
    --background-color: #FFFBFE;
    --on-background-color: #1C1B1F;
    --error-color: #B3261E;
    --on-error-color: #FFFFFF;
    --outline-color: #79747E;
    
    --elevation-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --elevation-2: 0 3px 6px rgba(0,0,0,0.15), 0 2px 4px rgba(0,0,0,0.12);
    --elevation-3: 0 10px 20px rgba(0,0,0,0.15), 0 3px 6px rgba(0,0,0,0.10);

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--on-background-color);
    background-color: var(--background-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }

/* Header Styles */
header {
    background-color: var(--surface-color);
    box-shadow: var(--elevation-1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 2rem;
}

.nav-links a {
    color: var(--on-surface-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--on-surface-color);
    cursor: pointer;
}

/* Button Styles */
.button {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.button-primary {
    background-color: var(--primary-color);
    color: var(--on-primary-color);
}

.button-primary:hover {
    background-color: #7B65B5;
}

/* Hero Section */
#hero {
    background-color: var(--secondary-color);
    color: var(--on-secondary-color);
    padding: 8rem 0 4rem;
    text-align: center;
}

#hero h1 {
    margin-bottom: 1rem;
}

#hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

/* Card Styles */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.card {
    background-color: var(--surface-color);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--elevation-1);
}

.card:hover {
    box-shadow: var(--elevation-3);
}

.card .material-icons {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Features Section */
#features {
    background-color: var(--background-color);
    padding: 4rem 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.feature {
    text-align: center;
}

.feature .material-icons {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Clients Section */
#clients {
    background-color: var(--surface-color);
    padding: 4rem 0;
}

.client-logos {
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
}

.client-logos img {
    max-width: 120px;
    margin: 1rem;
    filter: grayscale(0%);
    transition: var(--transition);
    opacity: 0.6;
}

.client-logos img:hover {
    filter: grayscale(0%);
    opacity: 1;
}

/* Contact Section */
#contact {
    background-color: var(--background-color);
    padding: 4rem 0;
}

#contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    position: relative;
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--outline-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group label {
    position: absolute;
    left: 0.75rem;
    top: 0.75rem;
    color: var(--outline-color);
    transition: var(--transition);
    pointer-events: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
}

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -0.5rem;
    left: 0.5rem;
    font-size: 0.8rem;
    background-color: var(--background-color);
    padding: 0 0.25rem;
    color: var(--primary-color);
}

/* Footer Styles */
footer {
    background-color: var(--surface-color);
    color: var(--on-surface-color);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--on-surface-color);
    text-decoration: none;
    transition: var(--transition);
}

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

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icons a {
    color: var(--primary-color);
    font-size: 1.5rem;
    transition: var(--transition);
}

.social-icons a:hover {
    color: var(--on-surface-color);
}

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

/* Responsive Design */
@media screen and (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--surface-color);
        flex-direction: column;
        padding: 1rem 0;
        box-shadow: var(--elevation-2);
    }

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

    .nav-links li {
        margin: 0.5rem 0;
    }

    .menu-toggle {
        display: block;
    }

    #hero {
        padding: 6rem 0 3rem;
    }

    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}