* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Roboto, Arial, sans-serif;
    background: linear-gradient(135deg, #f5f7fa, #e4e9f0);
    color: #2b2b2b;
}

.header {
    background: linear-gradient(135deg, #1f3c88, #274b9f);
    color: white;
    padding: 60px 20px;
    text-align: center;
}

.header h1 {
    margin: 0;
    font-size: 36px;
    font-weight: 600;
}

.header p {
    margin-top: 15px;
    font-size: 18px;
    opacity: 0.95;
}

.container {
    max-width: 1100px;
    margin: -40px auto 40px auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    padding: 40px;
}

.section {
    margin-bottom: 40px;
}

.section h2 {
    font-size: 24px;
    color: #1f3c88;
    margin-bottom: 15px;
}

.section p {
    font-size: 16px;
    line-height: 1.7;
}

.workflow {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.workflow-card {
    background: #f8f9fc;
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid #1f3c88;
}

.workflow-card h3 {
    margin-top: 0;
    font-size: 18px;
}

.demo-box {
    background: #fff7e6;
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid #ff9800;
}

.upload-box {
    margin-top: 15px;
}

.upload-box input,
.upload-box button {
    margin-top: 10px;
}

button {
    background: #1f3c88;
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 6px;
    cursor: not-allowed;
    font-size: 15px;
}

.image-box {
    text-align: center;
    margin-top: 20px;
}

.image-box img {
    max-width: 100%;
    border-radius: 8px;
    border: 1px solid #ccc;
}

.footer {
    text-align: center;
    font-size: 14px;
    color: #666;
    padding-top: 30px;
    border-top: 1px solid #ddd;
}