:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-color: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    background-image:
        radial-gradient(at 0% 0%, hsla(253, 16%, 7%, 1) 0, transparent 50%),
        radial-gradient(at 50% 0%, hsla(225, 39%, 30%, 1) 0, transparent 50%),
        radial-gradient(at 100% 0%, hsla(339, 49%, 30%, 1) 0, transparent 50%);
    background-attachment: fixed;
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 2rem;
    box-sizing: border-box;
}

.chart-container {
    background-color: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 3rem;
    width: 100%;
    max-width: 600px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s ease;
    animation: fadeIn 0.8s ease-out;
}

.chart-container:hover {
    transform: translateY(-8px);
    box-shadow: 0 30px 60px -10px rgba(0, 0, 0, 0.6), 0 0 25px rgba(56, 189, 248, 0.15);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

h1 {
    margin-top: 0;
    font-size: 2.25rem;
    font-weight: 600;
    text-align: center;
    background: linear-gradient(135deg, #e0f2fe 0%, #38bdf8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

p.subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    font-weight: 300;
    font-size: 1.1rem;
}

.canvas-wrapper {
    position: relative;
    height: 380px;
    width: 100%;
}

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    padding: 1.25rem;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 100;
    flex-wrap: wrap;
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

nav a:hover,
nav a.active {
    color: var(--accent);
}