:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --text-main: #1f2937;
    --text-secondary: #6b7280;
    --bg-body: #f3f4f6;
    --bg-card: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    background-image: linear-gradient(rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.85)), url('./bg.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    display: flex;
    justify-content: center;
    min-height: 100vh;
    color: var(--text-main);
    line-height: 1.5;
}

.container {
    width: 100%;
    max-width: 480px;
    background-color: var(--bg-card);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 24px;
    box-shadow: var(--shadow-lg);
}

.header {
    display: flex;
    align-items: center;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 16px;
    font-size: 14px;
    font-weight: 600;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
    border: 2px solid #fff;
}

.title {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.025em;
}

.feature-box {
    background: linear-gradient(135deg, #f9fafb 0%, #f3f4f6 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    margin-bottom: 32px;
    text-align: center;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-main);
    box-shadow: inset 0 2px 4px 0 rgba(0, 0, 0, 0.02);
}

.section-card {
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 32px;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.section-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary-color);
    width: 100%;
    text-align: center;
    color: var(--text-main);
}

.action-btn {
    width: 100%;
    padding: 16px 20px;
    margin-bottom: 16px;
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
    text-decoration: none;
    text-align: center;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.action-btn:hover {
    background-color: #f9fafb;
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.action-btn:active {
    transform: translateY(0);
}

.info-box {
    width: 100%;
    background-color: #eff6ff;
    border: 1px solid #dbeafe;
    color: #1e40af;
    padding: 16px;
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 500;
    margin-top: 8px;
}

.preview-btn {
    align-self: center;
    background-color: var(--text-main);
    color: #fff;
    border: none;
    padding: 12px 32px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 32px;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-md);
}

.preview-btn:hover {
    background-color: #000;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.image-area {
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-shadow: var(--shadow-md);
}

.preview-img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    display: block;
}

.apple-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    width: 100%;
}

.option-card {
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.option-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.option-img-box {
    width: 100%;
    aspect-ratio: 4/3;
    background-color: #f3f4f6;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #9ca3af;
}

.option-text {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
}

.text-center { text-align: center; }
.mb-4 { margin-bottom: 16px; }
.mb-8 { margin-bottom: 32px; }