/* GRAND Explorer — site-wide base stylesheet.
 *
 * Loaded by base.html right after Bootstrap, so equal-specificity rules here
 * win over Bootstrap's. Page-specific styling lives in each template.
 *
 * Sizing: the root font-size is 10px, so 1rem = 10px across the site.
 * --unit is the vertical rhythm step and --fs the body text size; both
 * shrink a little on phones.
 */

@import url("https://fonts.googleapis.com/css2?family=DM+Serif+Display&family=DM+Serif+Text&family=Inter:wght@300;400;500;600;700&display=swap");

:root {
    --font-1: "Inter", sans-serif;
    --font-2: "DM Serif Text", serif;
    --font-mono: Consolas, "Andale Mono", Courier, "Courier New", monospace;

    --unit: 3.2rem;
    --fs: 1.8rem;

    /* type sizes, each step x1.2 */
    --fs-xs: calc(var(--fs) / 1.44);
    --fs-sm: calc(var(--fs) / 1.2);
    --fs-md: calc(var(--fs) * 1.2);
    --fs-lg: calc(var(--fs) * 1.44);
    --fs-xl: calc(var(--fs) * 1.728);
    --fs-2xl: calc(var(--fs) * 2.0736);
    --fs-3xl: calc(var(--fs) * 2.48832);
    --fs-4xl: calc(var(--fs) * 2.985984);

    --ink: #000;
    --text: #282828;
    --rule: #eee;
    --soft-bg: #eff0f0;
    --soft-line: #d0d1d1;
    --field-line: #828484;
    --hint: #929393;
    --link: hsl(222, 88%, 33%);
    --link-hover: hsl(358, 65%, 46%);
}

@media screen and (max-width: 600px) {
    :root {
        --unit: 2.8rem;
        --fs: 1.7rem;
    }
}

/* ---- document ---------------------------------------------------- */

html {
    font-size: 62.5%;
    line-height: 1.15;
    box-sizing: border-box;
    -webkit-text-size-adjust: 100%;
}

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

html, body {
    height: 100%;
}

body {
    margin: 0;
    padding: 0;
    background: var(--soft-bg);
    color: var(--text);
    font-family: var(--font-1);
    font-size: var(--fs);
    font-weight: normal;
    line-height: var(--unit);
    overflow-wrap: break-word;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-text-size-adjust: none;
}

main, details { display: block; }
summary { display: list-item; }
template, [hidden] { display: none; }

svg, img, iframe, object {
    max-width: 100%;
    height: auto;
}

img { border-style: none; }

/* Form controls take the page font. */
button, input, optgroup, select, textarea {
    margin: 0;
    font-family: inherit;
    font-size: 100%;
    line-height: 1.15;
}

/* ---- spacing reset: block text elements start flush ---------------- */

div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6,
pre, form, p, blockquote, th, td, fieldset {
    margin: 0;
    padding: 0;
}

p, ul, ol, dl, pre, blockquote, figure, figcaption, table, form, img,
input, textarea, select {
    margin-bottom: var(--unit);
}

/* ---- headings ---------------------------------------------------- */

h1, h2, h3, h4, h5, h6, .h1, .h2, .h3, .h4, .h5, .h6 {
    color: var(--ink);
    font-family: var(--font-2);
    font-style: normal;
    font-weight: 400;
    font-variant-ligatures: common-ligatures;
    text-rendering: optimizeLegibility;
    margin-top: calc(var(--unit) * 2.5);
    margin-bottom: calc(var(--unit) / 2);
}

h1, .h1 {
    font-size: var(--fs-4xl);
    line-height: calc(var(--unit) * 1.875);
    margin-top: calc(var(--unit) * 3);
    margin-bottom: calc(var(--unit) * 0.75);
}

h2, .h2 { font-size: var(--fs-2xl); line-height: calc(var(--unit) * 1.375); }
h3, .h3 { font-size: var(--fs-xl);  line-height: calc(var(--unit) * 1.25); }
h4, .h4 { font-size: var(--fs-lg);  line-height: var(--unit); }

h5, .h5, h6, .h6 { margin-top: calc(var(--unit) * 1.5); }
h5, .h5 { font-size: var(--fs-md); line-height: calc(var(--unit) * 0.875); }

h6, .h6 {
    font-family: var(--font-1);
    font-size: var(--fs-sm);
    font-weight: 600;
    line-height: calc(var(--unit) * 0.75);
    letter-spacing: .2em;
    text-transform: uppercase;
}

@media screen and (max-width: 600px) {
    h1, .h1 {
        font-size: var(--fs-3xl);
        line-height: calc(var(--unit) * 1.75);
    }
}

/* ---- inline text ------------------------------------------------- */

p {
    font-size: inherit;
    text-rendering: optimizeLegibility;
}

a {
    color: var(--link);
    background-color: transparent;
    text-decoration: none;
    line-height: inherit;
    transition: all .3s ease-in-out;
}

a:hover, a:focus, a:active { color: var(--link-hover); }
a:hover, a:active { outline: 0; }

em, i, strong, b {
    font-family: var(--font-1);
    font-size: inherit;
    line-height: inherit;
}

em, i { font-style: italic; }

strong, b {
    color: var(--ink);
    font-weight: 600;
}

small {
    font-size: var(--fs-sm);
    font-weight: 500;
    line-height: calc(var(--unit) / 2);
}

sub, sup {
    font-size: 75%;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
}

sub { bottom: -.25em; }
sup { top: -.5em; }

abbr {
    font-family: var(--font-1);
    font-weight: 400;
    font-variant: small-caps;
    text-transform: lowercase;
    letter-spacing: .1em;
}

abbr[title], dfn[title] {
    border-bottom: 1px dotted;
    text-decoration: none;
    cursor: help;
}

del { text-decoration: line-through; }

mark {
    background: hsl(51, 100%, 80%);
    color: var(--ink);
}

code, kbd, samp, var, pre {
    font-family: var(--font-mono);
}

/* Bootstrap shrinks these to .875em; keep them at the surrounding size. */
pre, kbd, samp { font-size: 1em; }

code {
    margin: 0 .2rem;
    padding: calc((var(--unit) - 1.6rem) / 2 - .1rem) .7rem;
    border: 1px solid var(--soft-line);
    border-radius: 3px;
    background: var(--soft-bg);
    color: var(--text);
    font-size: var(--fs-sm);
    line-height: 1.6rem;
    white-space: nowrap;
}

pre {
    padding: calc(var(--unit) * 0.75) var(--unit) var(--unit);
    background: var(--soft-bg);
    overflow-x: auto;
}

pre > code {
    display: block;
    margin: 0;
    padding: 0;
    border: none;
    line-height: var(--unit);
    white-space: pre;
}

blockquote {
    position: relative;
    padding: var(--unit) calc(var(--unit) * 1.5);
    border-left: 4px solid black;
}

blockquote p {
    color: var(--ink);
    font-family: var(--font-1);
    font-size: var(--fs-lg);
    font-style: normal;
    font-weight: 400;
    line-height: calc(var(--unit) * 1.25);
}

blockquote cite {
    display: block;
    color: var(--hint);
    font-family: var(--font-1);
    font-size: var(--fs-sm);
    font-style: normal;
    font-weight: 400;
    line-height: calc(var(--unit) * 0.75);
}

blockquote cite::before { content: "\2014 \0020"; }
blockquote cite a { color: var(--hint); }

@media screen and (max-width: 400px) {
    blockquote { padding: calc(var(--unit) * 0.75); }
}

figure {
    display: block;
    margin-left: 0;
    margin-right: 0;
}

figure img, p img {
    margin: 0;
    vertical-align: bottom;
}

figure img + figcaption { margin-top: var(--unit); }

figcaption {
    font-size: var(--fs-sm);
    text-align: center;
}

hr {
    clear: both;
    box-sizing: content-box;
    height: 0;
    overflow: visible;
    margin: calc(var(--unit) * 2) 0 calc(var(--unit) * 2 - .1rem);
    border: solid var(--rule);
    border-width: .1rem 0 0;
}

/* ---- lists ------------------------------------------------------- */

ul { list-style: disc; }
ol { list-style: decimal; }
li { display: list-item; }

ul, ol { margin-left: 1.6rem; }
ul li { padding-left: .4rem; }

ul ul, ul ol, ol ol, ol ul {
    margin: 1.6rem 0 1.6rem 1.6rem;
}

dt { margin: 0; color: var(--link); }
dd { margin: 0 0 0 2rem; }

/* ---- tables ------------------------------------------------------ */

table {
    width: 100%;
    max-width: 100%;
    border-width: 0;
    border-collapse: collapse;
    font-family: var(--font-1);
}

th, td {
    padding: calc(var(--unit) / 2) 3.2rem calc(var(--unit) / 2 - .1rem);
    text-align: left;
    border-bottom: 1px solid var(--rule);
}

th {
    padding-bottom: calc(var(--unit) / 2);
    color: var(--ink);
    font-family: var(--font-1);
    font-weight: 600;
}

th:first-child, td:first-child { padding-left: 0; }
th:last-child, td:last-child { padding-right: 0; }

/* ---- forms ------------------------------------------------------- */

button, input { overflow: visible; }
button, select { text-transform: none; }
textarea { overflow: auto; }

button, [type="button"], [type="reset"], [type="submit"] {
    -webkit-appearance: button;
}

::-webkit-file-upload-button {
    -webkit-appearance: button;
    font: inherit;
}

fieldset {
    margin-bottom: calc(var(--unit) / 2);
    border: none;
}

legend {
    display: table;
    max-width: 100%;
    padding: 0;
    white-space: normal;
}

progress { vertical-align: baseline; }

[type="checkbox"], [type="radio"] {
    padding: 0;
}

input[type="checkbox"], input[type="radio"] { display: inline; }

[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
    height: auto;
}

[type="search"] {
    -webkit-appearance: textfield;
    outline-offset: -2px;
}

[type="search"]::-webkit-search-decoration { -webkit-appearance: none; }

/* Text fields: borderless with an underline. */
input[type="email"], input[type="number"], input[type="search"],
input[type="text"], input[type="tel"], input[type="url"],
input[type="password"], textarea, select {
    display: block;
    height: calc(var(--unit) * 2);
    max-width: 100%;
    padding: calc(var(--unit) / 2) 0 calc(var(--unit) / 2 - .1rem);
    border: 0;
    border-bottom: 1px solid var(--field-line);
    outline: none;
    background: transparent;
    color: var(--text);
    font-family: var(--font-1);
    font-size: calc(var(--fs) * 0.7778);
    line-height: var(--unit);
    transition: all .3s ease-in-out;
}

input[type="email"], input[type="number"], input[type="search"],
input[type="text"], input[type="tel"], input[type="url"],
input[type="password"], textarea {
    appearance: none;
}

textarea { min-height: 25.6rem; }

input[type="email"]:focus, input[type="number"]:focus, input[type="search"]:focus,
input[type="text"]:focus, input[type="tel"]:focus, input[type="url"]:focus,
input[type="password"]:focus, textarea:focus, select:focus {
    color: var(--ink);
    border-bottom: 2px solid var(--ink);
}

label, legend {
    display: block;
    margin-bottom: calc(var(--unit) / 2);
    color: var(--ink);
    font-family: var(--font-1);
    font-size: var(--fs-sm);
    font-weight: 700;
    line-height: calc(var(--unit) / 2);
}

label > input[type="checkbox"], label > input[type="radio"] {
    position: relative;
    top: .2rem;
    margin: 0;
}

::placeholder { color: var(--hint); }

/* Keep Chrome's autofill from repainting fields yellow. */
input:-webkit-autofill, input:-webkit-autofill:hover,
textarea:-webkit-autofill,
select:-webkit-autofill, select:-webkit-autofill:hover, select:-webkit-autofill:focus {
    -webkit-text-fill-color: var(--link);
    transition: background-color 5000s ease-in-out 0s;
}

/* ---- buttons ----------------------------------------------------- */

.btn, button, input[type="submit"], input[type="reset"], input[type="button"] {
    display: inline-block;
    height: calc(var(--unit) * 2);
    margin: 0 .4rem 1.6rem 0;
    padding: 0 3.2rem;
    border: .2rem solid var(--soft-line);
    background-color: var(--soft-line);
    color: var(--ink);
    font-family: var(--font-1);
    font-size: var(--fs-xs);
    font-weight: 400;
    line-height: calc(var(--unit) * 2 - .4rem);
    letter-spacing: .4em;
    text-align: center;
    text-decoration: none;
    text-transform: uppercase;
    white-space: nowrap;
    cursor: pointer;
    transition: all .3s;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.btn:hover, button:hover, input[type="submit"]:hover,
input[type="reset"]:hover, input[type="button"]:hover,
.btn:focus-visible, button:focus-visible, input[type="submit"]:focus-visible,
input[type="reset"]:focus-visible, input[type="button"]:focus-visible {
    border-color: var(--ink);
    background-color: var(--ink);
    color: #fff;
    outline: 0;
}

/* ---- layout ------------------------------------------------------ */

/* Full-width, centred flex row (also tames Bootstrap's .row gutters). */
.row {
    display: flex;
    flex-flow: row wrap;
    width: 100%;
    margin: 0 auto;
}

@media screen and (max-width: 800px) {
    .row { width: 90%; }
}

@media screen and (max-width: 600px) {
    .row {
        width: 100%;
        padding-left: 6vw;
        padding-right: 6vw;
    }
}

/* White content band below the fixed navbar. */
.page-section {
    background-color: white;
    padding-top: calc(var(--unit) * 3);
}

@media screen and (max-width: 1200px) {
    .page-section { padding-top: calc(var(--unit) * 5); }
}

@media screen and (max-width: 400px) {
    .page-section { padding-top: calc(var(--unit) * 4.5); }
}