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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-app);
    min-height: 100vh;
    overflow-x: hidden;
    position: fixed;
    width: 100%;
    height: 100%;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.3;
    margin: 0;
}

h2 { font-size: var(--font-size-lg); }
h3 { font-size: var(--font-size-base); }

p {
    margin: 0 0 var(--spacing-md) 0;
    line-height: 1.6;
}

ul, ol {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

strong {
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

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

::selection {
    background-color: var(--color-primary);
    color: white;
}