/*variables*/
:root {
    --colour-blue: #0d6efd;
    --colour-darkblue: #08439a;
    --colour-grey: #6c757d;
    --colour-white: #ffffff;
    --colour-darkgrey: #333;
    --colour-glass: #ffffff07;
    --colour-tint: rgba(255, 255, 255, 0.3);

    --colour-background: #f8f9fa;
    --colour-border: #dee2e6;
    --colour-border-light: #e9ecef;
    --colour-text: #212529;
    --colour-text-muted: #6c757d;
    --colour-star-active: #ffc107;

    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 1rem;
    --radius-pill: 50rem;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.10);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-darkblue-small: 0 0 0 3px rgba(13, 110, 253, 0.15);

    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    --font-base: 'Source Sans 3', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --line-height-base: 1.6;
    --line-height-tight: 1.3;

    --z-sidebar: 100;
    --z-overlay: 200;
    --z-modal: 300;
    --z-tooltip: 400;
    --z-scroll-top: 500;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-base);
    font-size: var(--font-size-md);
    line-height: var(--line-height-base);
    color: var(--colour-text);
    background-color: var(--colour-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
    color: var(--colour-darkblue);
    text-decoration: underline;
}

h1, h2, h3, h4, h5, h6 {
    line-height: var(--line-height-tight);
    font-weight: 700;
    margin-top: 0;
    margin-bottom: var(--space-sm);
}

p {
    margin-top: 0;
    margin-bottom: var(--space-md);
}

small,
.text-sm {
    font-size: var(--font-size-sm);
}

.text-muted {
    color: var(--colour-text-muted) !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}