:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #dbeafe;
    --color-accent: #38bdf8;
    --color-bg: #f8fafc;
    --color-panel: #ffffff;
    --color-text: #0f172a;
    --color-muted: #64748b;
    --color-border: #e2e8f0;
    --color-success: #16a34a;
    --color-success-bg: #dcfce7;
    --color-error: #dc2626;
    --color-error-bg: #fee2e2;
    --radius: 0.75rem;
    --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.06);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
}

h1, h2, h3 {
    line-height: 1.25;
    margin: 0 0 0.75em;
}

h1 {
    font-size: 1.5rem;
    color: var(--color-muted);
}

h2 {
    font-size: 1.1rem;
    color: var(--color-muted);
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

p {
    margin: 0 0 1em;
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

img {
    max-width: 100%;
    display: block;
}

button {
    font: inherit;
}

:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}