:root {
    --bg-color: #fdfdfd;
    --text-primary: #000000;
    --text-secondary: #000000;
    --accent-color: #000;
    --card-bg: #fff;
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 10px 40px rgba(0, 0, 0, 0.05);
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
    font-family: 'Be Vietnam Pro', sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 900px;
    position: relative;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: #fff;
    border: 2px solid #f0f0f0;
    border-radius: 99px;
    color: var(--text-secondary);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
    position: absolute;
    top: -80px;
    left: 0;
}

@media (hover: hover) {
    .back-link:hover {
        color: var(--text-primary);
        border-color: #000;
        transform: translateX(-4px);
        box-shadow: 0 6px 15px rgba(0, 0, 0, 0.05);
    }
}

.content-wrapper {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: stretch;
    gap: 40px;
    background: #fff;
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.qr-card {
    flex: 0 0 320px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: #fbfbfb;
    padding: 2rem;
    border-radius: var(--radius-md);
}

.qr-frame {
    background: #fff;
    padding: 15px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
}

.qr-image {
    width: 200px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 8px;
}

.download-btn {
    display: none;
    align-items: center;
    gap: 10px;
    background: #000;
    color: #fff;
    border: none;
    border-radius: 99px;
    padding: 12px 24px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    width: 100%;
    justify-content: center;
}

@media (hover: hover) {
    .download-btn:hover {
        background: #333;
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    }
}

.info-list {
    flex: 1;
    min-width: 300px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding-top: 10px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 16px;
    border-radius: var(--radius-md);
    border: 2px solid #f0f0f0;
    background: #fbfbfb;
    transition: var(--transition);
}

@media (hover: hover) {
    .info-item:hover {
        border-color: #000;
        background: #fff;
        box-shadow: var(--shadow-sm);
    }
}

.icon-box {
    width: 48px;
    height: 48px;
    background: #fff;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    color: var(--text-primary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
}

.info-text h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.info-text p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.account-select {
    width: 100%;
    padding: 14px 20px;
    border-radius: 12px;
    border: 2px solid #f0f0f0;
    background: #fff;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    appearance: none;
    background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23000000%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
    background-repeat: no-repeat;
    background-position: right 20px center;
    background-size: 12px;
}

@media (hover: hover) {
    .account-select:hover {
        border-color: #000;
    }
}

.account-select:focus {
    outline: none;
    border-color: #000;
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

@media (max-width: 768px) {
    .container {
        padding-top: 60px;
    }

    .back-link {
        top: 0;
        left: 20px;
    }

    .content-wrapper {
        flex-direction: column;
        padding: 1.5rem;
        gap: 2rem;
    }

    .qr-card,
    .info-list {
        width: 100%;
        flex: auto;
    }
}

.copy-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 4px;
    border-radius: 4px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (hover: hover) {
    .copy-btn:hover {
        color: var(--text-primary);
        background-color: rgba(0, 0, 0, 0.05);
    }
}

.copy-btn.copied {
    color: #000;
}

.copy-btn i {
    font-size: 0.9rem;
}