:root {
    --bg-main: #ffffff;
    --text-primary: #000000;
    --text-secondary: #666666;
    --text-placeholder: #999999;
    --button-teal: #9CE3E3;
    --button-blue: #2F9BFF;
    --button-orange: #FFB340;
    --button-purple: #A98CFF;
    --border-color: #000000;
    --modal-bg: rgba(0, 0, 0, 0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Montserrat', sans-serif;
}

body {
    background: var(--bg-main);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
    color: var(--text-primary);
    overflow-y: auto;
}

.container {
    width: 100%;
    max-width: 480px;
    background: var(--bg-main);
    border-radius: 16px;
    border: 2px solid var(--border-color);
    padding: 20px;
    position: relative;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
    margin: auto;
}

.container:hover {
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.15);
}

.profile-card {
    text-align: center;
    margin-bottom: 20px;
}

.profile-image {
    width: 120px;
    height: 120px;
    border-radius: 10px;
    margin-bottom: 10px;
    border: 2px solid var(--border-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.product-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin-bottom: 20px;
}

.product-card {
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 10px;
    text-align: center;
    box-shadow: 4px 4px 0 var(--border-color);
    transition: all 0.2s ease;
    margin-bottom: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    aspect-ratio: 1 / 1;
    position: relative;
}

.product-card:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--border-color);
}

.product-card:active {
    transform: translate(0, 0);
    box-shadow: 2px 2px 0 var(--border-color);
}

.product-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 0;
}

.product-card h3 {
    font-size: 14px; /* Reduced from 16px */
    margin-bottom: 5px;
    width: 100%;
    text-align: center;
    overflow-wrap: break-word;
    word-break: break-word;
}

.product-card p {
    font-size: 14px;
    margin-bottom: 5px;
    width: 100%;
    text-align: center;
    overflow-wrap: break-word;
    word-break: break-word;
    margin-bottom: 2px;
}

.product-card .discount-label {
    position: absolute;
    top: 5px;
    left: 5px;
    background: #FF0000;
    color: white;
    padding: 2px 5px;
    border-radius: 4px;
    font-size: 0.8em;
    font-weight: bold;
}

.buy-button {
    padding: 10px 12px;
    border: 2px solid var(--border-color);
    background: var(--button-blue);
    color: white;
    font-family: 'Helvetica', sans-serif;
    font-size: 14px;
    cursor: pointer;
    position: relative;
    margin-top: 8px;
    border-radius: 8px;
    box-shadow: 4px 4px 0 var(--border-color);
    transition: all 0.2s ease;
    align-self: stretch;
}

.buy-button:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--border-color);
}

.buy-button:active {
    transform: translate(0, 0);
    box-shadow: 2px 2px 0 var(--border-color);
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: var(--modal-bg);
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-main);
    border-radius: 16px;
    border: 2px solid var(--border-color);
    padding: 20px;
    position: relative;
    max-width: 90%;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
    overflow-y: auto;
}

.modal-content:hover {
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.15);
}

.modal-content h2 {
    font-size: 20px;
    margin-bottom: 12px;
    text-align: center;
}

.close-button {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 20px;
    cursor: pointer;
    color: var(--text-secondary);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: normal;
    font-size: 12px;
}

.required {
    color: #FF0000;
    margin-left: 2px;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: none;
    border-bottom: 2px solid var(--border-color);
    font-family: 'Helvetica', sans-serif;
    font-size: 12px;
    background: transparent;
    border-radius: 8px 8px 0 0;
}

.form-group input::placeholder {
    color: var(--text-placeholder);
}

.form-group input:focus {
    outline: none;
    border-color: var(--button-blue);
}

#qrcode {
    margin-top: 16px;
    padding: 16px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 150px;
    position: relative;
    box-shadow: 4px 4px 0 var(--border-color);
    transition: box-shadow 0.3s ease;
}

.qrcode-container:hover {
    box-shadow: 6px 6px 0 var(--border-color);
}

.confirm-payment-button {
    width: 100%;
    padding: 12px;
    background: var(--button-teal);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    font-family: 'Helvetica', sans-serif;
    font-size: 14px;
    cursor: pointer;
    position: relative;
    margin-top: 10px;
    border-radius: 8px;
    box-shadow: 4px 4px 0 var(--border-color);
    transition: all 0.2s ease;
}

.confirm-payment-button:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--border-color);
}

.confirm-payment-button:active {
    transform: translate(0, 0);
    box-shadow: 2px 2px 0 var(--border-color);
}

.generate-button {
    width: 100%;
    padding: 12px;
    background: var(--button-blue);
    color: white;
    border: 2px solid var(--border-color);
    font-family: 'Helvetica', sans-serif;
    font-size: 14px;
    cursor: pointer;
    position: relative;
    margin-top: 10px;
    border-radius: 8px;
    box-shadow: 4px 4px 0 var(--border-color);
    transition: all 0.2s ease;
}

.generate-button:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--border-color);
}

.generate-button:active {
    transform: translate(0, 0);
    box-shadow: 2px 2px 0 var(--border-color);
}

@media (min-width: 768px) {
    body {
        padding: 20px;
    }
    .container {
        padding: 24px;
    }
    .profile-image {
        width: 150px;
        height: 150px;
    }
    .product-list {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
    }
    .product-card {
        padding: 16px;
        margin-bottom: 15px;
    }
    .product-image {
        width: 100%;
        height: 100%;
        margin-bottom: 0;
    }
    .product-card h3 {
        font-size: 16px; /* Reduced from 18px */
    }
    .product-card p {
        font-size: 16px;
    }
    .buy-button {
        padding: 12px 16px;
        margin-top: 10px;
    }
    .modal-content {
        padding: 24px;
        max-width: 400px;
    }
    .modal-content h2 {
        font-size: 24px;
        margin-bottom: 16px;
    }
    .close-button {
        font-size: 24px;
    }
    .form-group {
        margin-bottom: 24px;
    }
    .form-group label {
        margin-bottom: 8px;
        font-size: 14px;
    }
    .form-group input {
        padding: 12px;
        font-size: 14px;
    }
    #qrcode {
        margin-top: 24px;
        padding: 24px;
        min-height: 200px;
    }
    .generate-button {
        padding: 16px;
        font-size: 16px;
        margin-top: 16px;
    }
}