:root {
    --sky-blue: #7ec0ee;
    --aqua: #00c0ff;
    --glass-white: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px rgba(0, 192, 255, 0.2);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #7ec0ee, #00c0ff);
    color: #333;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background-attachment: fixed;
}

.glass-panel {
    background: var(--glass-white);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    padding: 2rem;
    margin: 1rem;
}

.btn-aero {
    background: linear-gradient(to bottom, #7ec0ee, #00a8ff);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 24px;
    color: white;
    padding: 12px 24px;
    font-weight: bold;
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
    box-shadow: 0 4px 15px rgba(0, 192, 255, 0.3);
    transition: all 0.3s ease;
}

.btn-aero:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 192, 255, 0.4);
}

.aero-icon {
    width: 64px;
    height: 64px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin: 0 auto 1rem;
}

.aero-icon i {
    font-size: 32px;
    color: var(--aqua);
}

h1, h2, h3 {
    color: #0066cc;
    text-shadow: 0 1px 1px rgba(255, 255, 255, 0.8);
}

/* Windows Vista/7 style scrollbar */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(to bottom, #7ec0ee, #00a8ff);
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

/* Bubble elements */
.bubble {
    position: absolute;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: float 15s infinite ease-in-out;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}