* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #f5f7fb;
    color: #172033;
}

.app {
    max-width: 600px;
    margin: auto;
    padding: 16px;
}

.header {
    background: white;
    border-radius: 20px;
    padding: 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 20px rgba(0,0,0,.05);
}

.header h1 {
    margin: 0;
    font-size: 21px;
}

.header p {
    margin: 5px 0 0;
    color: #7b8497;
    font-size: 13px;
}

.user {
    background: #eef4ff;
    color: #2563eb;
    padding: 9px 13px;
    border-radius: 12px;
    font-size: 13px;
}

.hero {
    margin: 16px 0;
    padding: 22px;
    border-radius: 20px;
    background: white;
    box-shadow: 0 4px 20px rgba(0,0,0,.05);
}

.hero h2 {
    margin: 0 0 7px;
}

.hero p {
    margin: 0;
    color: #7b8497;
}

h3 {
    margin: 20px 4px 12px;
}

.products {
    display: grid;
    gap: 12px;
}

.product {
    background: white;
    border-radius: 18px;
    padding: 17px;
    box-shadow: 0 4px 20px rgba(0,0,0,.05);
}

.product-name {
    font-size: 17px;
    font-weight: 700;
}

.product-description {
    color: #7b8497;
    font-size: 13px;
    margin-top: 7px;
}

.product-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 15px;
}

.price {
    font-weight: 700;
    color: #2563eb;
}

.buy-btn {
    border: 0;
    background: #2563eb;
    color: white;
    padding: 10px 17px;
    border-radius: 12px;
    font-size: 14px;
    cursor: pointer;
}

.loading {
    text-align: center;
    padding: 30px;
    color: #7b8497;
}