:root {
    --paper: #FAFAFA;
    --ink: #18181B;
    --sub: #52525B;
    --faint: #A1A1AA;
    --line: #E4E4E7;
    --card: #FFFFFF;
    --accent: #18181B;
    --accent-2: #52525B;
    --accent-ink: #FFFFFF;
    --dot-opacity: 0.06;
}

::selection {
    background-color: var(--accent-2);
    color: var(--accent-ink);
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--paper);
    background-image:
        radial-gradient(circle at 1px 1px, rgba(127, 127, 127, var(--dot-opacity)) 1px, transparent 0);
    background-size: 22px 22px;
    font-family: 'Inter', sans-serif;
    color: var(--ink);
    transition: background-color 200ms ease, color 200ms ease;
}

.mono {
    font-family: 'IBM Plex Mono', monospace;
}

.marker {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    letter-spacing: 0.06em;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.marker::before {
    content: "//";
    color: var(--faint);
}

.chip {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.02em;
    border: 1px solid var(--line);
    background: var(--card);
    color: var(--sub);
    padding: 0.2rem 0.55rem;
    border-radius: 0.3rem;
    user-select: none;
}

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 0.6rem;
    transition: border-color 150ms ease, box-shadow 150ms ease, background-color 200ms ease;
}

.card:hover {
    border-color: var(--accent);
    box-shadow: 0 1px 0 0 var(--accent);
}

.tl-dot {
    width: 9px;
    height: 9px;
    border-radius: 9999px;
    background: var(--paper);
    border: 2px solid var(--accent);
    transition: background-color 200ms ease;
}

.tl-line {
    width: 1px;
    background: var(--line);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--accent);
    color: var(--accent-ink);
    font-weight: 600;
    font-size: 0.875rem;
    padding: 0.6rem 1.1rem;
    border-radius: 0.6rem;
    min-height: 44px;
    transition: opacity 150ms ease, transform 150ms ease;
}

.btn-primary:hover {
    opacity: 0.9;
}

.btn-primary:active {
    transform: scale(0.98);
}

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



@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        scroll-behavior: auto !important;
    }
}

@media print {
    body {
        background-image: none;
    }

    .no-print {
        display: none !important;
    }
}