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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

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

/* Header */
.header {
    background: #fff;
    border-bottom: 1px solid #e1e3e6;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo h1 {
    color: #00a76a;
    font-size: 24px;
}

.nav {
    display: flex;
    align-items: center;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

.nav a {
    color: #333;
    text-decoration: none;
    font-size: 16px;
}

.nav a:hover {
    color: #00a76a;
}

.nav-toggle {
    display: none;
    font-size: 24px;
    background: none;
    border: none;
    color: #333;
    cursor: pointer;
}

/* Hero */
.hero {
    background: #fff;
    text-align: center;
    padding: 60px 0;
}

.hero h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 18px;
    color: #666;
    margin-bottom: 30px;
}

.cta-button {
    background: #00a76a;
    color: #fff;
    border: none;
    padding: 12px 24px;
    border-radius: 20px;
    font-size: 16px;
    cursor: pointer;
}

.cta-button:hover {
    background: #008753;
}

/* Features */
.features {
    padding: 60px 0;
}

.features h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.feature-card {
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 16px;
    color: #666;
}

/* Pricing */
.pricing {
    padding: 60px 0;
    background: #e6ebee;
}

.pricing h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.pricing-card {
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.pricing-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.pricing-card .price {
    font-size: 24px;
    color: #00a76a;
    margin-bottom: 20px;
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 20px;
}

.pricing-card ul li {
    font-size: 16px;
    color: #666;
    margin-bottom: 10px;
}

/* Use Cases */
.use-cases {
    padding: 60px 0;
}

.use-cases h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.use-case {
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.use-case h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.use-case p {
    font-size: 16px;
    color: #666;
}

/* Contact */
.contact {
    padding: 60px 0;
    background: #fff;
}

.contact h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 20px;
}

.contact p {
    text-align: center;
    font-size: 18px;
    color: #666;
    margin-bottom: 30px;
}

.contact a {
    color: #00a76a;
    text-decoration: none;
}

.contact form {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact input,
.contact textarea {
    padding: 12px;
    border: 1px solid #e1e3e6;
    border-radius: 8px;
    font-size: 16px;
}

.contact textarea {
    resize: vertical;
    min-height: 100px;
}

/* FAQ */
.faq {
    padding: 60px 0;
}

.faq h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
}

.faq-item {
    max-width: 800px;
    margin: 0 auto 20px;
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.faq-item h3 {
    font-size: 18px;
    margin-bottom: 10px;
}

.faq-item p {
    font-size: 16px;
    color: #666;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: #fff;
    border-radius: 12px;
    width: 400px;
    max-width: 90%;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.modal-header {
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-header h4 {
    font-size: 16px;
    font-weight: 500;
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.file-upload {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 300px;
    overflow-y: auto;
}

.file-list-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #f5f7fa;
    padding: 8px;
    border-radius: 8px;
}

.file-list-item img {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 4px;
}

.file-list-item .file-icon {
    font-size: 24px;
    color: #00a76a;
}

.file-list-item span {
    flex: 1;
    font-size: 13px;
    color: #000;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-list-item button {
    background: none;
    border: none;
    color: #ff3b30;
    font-size: 16px;
    cursor: pointer;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    align-items: center;
}

.modal-footer .file-upload-label {
    display: flex;
    align-items: center;
    background: #f5f7fa;
    border: 1px solid #e1e3e6;
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
}

.modal-footer .file-upload-label input {
    display: none;
}

.modal-footer .file-upload-label span {
    font-size: 14px;
    color: #00a76a;
}

.modal-footer button {
    padding: 8px 16px;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
}

#cancelFileBtn {
    background: #e1e3e6;
    color: #000;
}

#sendFileBtn {
    background: #00a76a;
    color: #fff;
}

#sendFileBtn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

/* Responsive */
@media (max-width: 768px) {
    .nav ul {
        display: none;
        flex-direction: column;
        gap: 10px;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background: #fff;
        padding: 20px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }

    .nav ul.active {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

    .header .container {
        flex-wrap: wrap;
    }

    .hero h2 {
        font-size: 28px;
    }

    .hero p {
        font-size: 16px;
    }
}