@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;800&display=swap');

:root {
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --text-main: #111827;
    --text-muted: #6b7280;
    --accent: #f97316;
    /* Orange for trend */
    --success: #22c55e;
    /* Green for goal */
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #111827;
        --card-bg: #1f2937;
        --text-main: #f9fafb;
        --text-muted: #9ca3af;
    }
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

.container {
    max-width: 800px;
    width: 100%;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

header h1 {
    font-weight: 800;
    font-size: 2.5rem;
    line-height: 1.2;
    letter-spacing: -0.025em;
    margin-bottom: 0.5rem;
}

header .subtitle {
    font-weight: 600;
    font-size: 1.5rem;
    color: var(--accent);
}

.intro p {
    font-size: 1.125rem;
    color: var(--text-muted);
}

.dashboard {
    margin-top: 1.5rem;
}

.card {
    background-color: var(--card-bg);
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    padding: 1.5rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.chart-container {
    position: relative;
    height: 400px;
    width: 100%;
}

footer {
    margin-top: auto;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(107, 114, 128, 0.2);
}