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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', sans-serif;
    line-height: 1.6;
    color: #1d1d1f;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 122, 122, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 200, 255, 0.2) 0%, transparent 50%),
        linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    background-attachment: fixed;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px;
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 
        0 32px 64px rgba(0, 0, 0, 0.1),
        0 8px 32px rgba(0, 0, 0, 0.05),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
    margin: 20px auto;
    position: relative;
    overflow: hidden;
}

.container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8), transparent);
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
    padding: 20px 0;
}

header h1 {
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #007AFF 0%, #5856D6 50%, #FF2D92 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 15px;
    letter-spacing: -0.02em;
    text-align: center;
}

header p {
    font-size: 2rem;
    color: rgba(29, 29, 31, 0.9);
    font-weight: 700;
    text-align: center;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

header .subtitle {
    font-size: 1.2rem;
    color: rgba(29, 29, 31, 0.6);
    font-weight: 500;
    text-align: center;
    letter-spacing: -0.01em;
    margin-bottom: 0;
}

.demo-notice {
    background: linear-gradient(135deg, #ffeaa7 0%, #fff3cd 100%);
    border: none;
    border-radius: 15px;
    padding: 15px 25px;
    margin: 20px auto;
    max-width: 500px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(255, 234, 167, 0.3);
    backdrop-filter: blur(10px);
}

.demo-notice p {
    margin: 0;
    color: #856404;
    font-size: 14px;
}