@font-face {
    font-display: swap;
    font-family: 'Inter';
    font-style: normal;
    font-weight: 400;
    src: url('../fonts/inter-v20-cyrillic_latin-regular.woff2') format('woff2');
}

@font-face {
    font-display: swap;
    font-family: 'Inter';
    font-style: italic;
    font-weight: 400;
    src: url('../fonts/inter-v20-cyrillic_latin-italic.woff2') format('woff2');
}

@font-face {
    font-display: swap;
    font-family: 'Inter';
    font-style: normal;
    font-weight: 500;
    src: url('../fonts/inter-v20-cyrillic_latin-500.woff2') format('woff2');
}

@font-face {
    font-display: swap;
    font-family: 'Inter';
    font-style: normal;
    font-weight: 700;
    src: url('../fonts/inter-v20-cyrillic_latin-700.woff2') format('woff2');
}

:root {
    --color-bg-base: #0a0a0a;
    --color-bg-surface: #141414;
    --color-text-primary: #f2f2f2;
    --color-text-secondary: #a1a1aa;
    --color-accent: #00e5ff;
    --color-accent-hover: #00b3cc;
    --color-border: #27272a;
    --font-family-base: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    --font-family-mono: 'JetBrains Mono', 'Fira Code', Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.5rem;
    --font-size-xl: 2.25rem;
    --font-size-xxl: 3.5rem;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;
    --line-height-body: 1.6;
    --line-height-heading: 1.2;
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-xxl: 4rem;
    --space-section: 8rem;
    --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 100%;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--color-bg-base);
    color: var(--color-text-primary);
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-body);
    font-weight: var(--font-weight-regular);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

input,
button,
textarea,
select {
    font: inherit;
    color: inherit;
    background: none;
    border: none;
}

ul,
ol {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--color-text-primary);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-heading);
    overflow-wrap: break-word;
}

h1 {
    font-size: var(--font-size-xxl);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--font-size-xl);
    letter-spacing: -0.01em;
}

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

p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    max-width: 65ch;
}

    p:last-child {
        margin-bottom: 0;
    }

a.text-link {
    color: var(--color-accent);
    position: relative;
}

    a.text-link:hover,
    a.text-link:focus-visible {
        color: var(--color-accent-hover);
    }

::selection {
    background-color: var(--color-accent);
    color: var(--color-bg-base);
}