/* ---------- RESET & BASE ---------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --red: #b22222;
    --black: #1e1e1e;
    --white: #f5f5f5;
    --gray-light: #e5e5e5;
    --gray: #7f7f7f;
    --gray-dark: #4a4a4a;
}

body {
    background-color: var(--white);
    font-family:
        "Inter",
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Helvetica,
        Arial,
        sans-serif;
    max-width: 70ch;
    margin: 0 auto;
    padding: 3rem 1.5rem;
    color: var(--black);
    line-height: 1.7;
    font-size: 1.1rem;
    font-weight: 400;
}

/* ---------- HEADINGS ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin: 2.5rem 0 1rem 0;
    color: var(--black);
    text-transform: uppercase;
}

h1 {
    font-size: 3rem;
    margin-top: 1rem;
    letter-spacing: -0.03em;
}

h2 {
    font-size: 2.2rem;
    margin-top: 1rem;
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
    text-transform: none;
    letter-spacing: -0.01em;
}

/* ---------- LINKS ---------- */
a {
    color: var(--black);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 2px solid var(--gray-light);
    transition: border-color 0.1s ease;
}

a:hover {
    border-bottom-color: var(--red);
    color: var(--black);
}

a[href^="http://"]::after,
a[href^="https://"]::after {
    content: '↗';
    padding-left: 0.2em;
    color: var(--gray);
}

/* ---------- HEADER & FOOTER ---------- */
header {
    padding-bottom: 0.75rem;
    text-transform: uppercase;
    font-weight: 800;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    color: var(--gray);
}

footer {
    padding-top: 0.75rem;
    font-size: 0.85rem;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

header > a,
footer > a {
    color: inherit;
    border: none;
    transition: color 0.1s ease;
}

header > a:hover,
footer > a:hover {
    color: var(--red);
}

/* ---------- ARTICLE CONTENT ---------- */
article {
    border-top: 4px solid var(--black);
    border-bottom: 4px solid var(--black);
}

article p {
    margin: 1.5rem 0;
}

/* ---------- FOOTNOTES ---------- */

.footnote-ref {
    font-size: 0.75rem;
    vertical-align: super;
    line-height: 0;
    margin-left: 0.1rem;
    color: var(--gray);
    font-weight: 600;
    text-decoration: none;
    border-bottom: none;
    transition: color 0.1s ease;
}

.footnote-ref:hover {
    color: var(--red);
    border-bottom: none;
}

.footnotes hr {
    margin: 0; 
    border: none;
    border-top: 2px solid var(--gray-light);
    width: 4rem;
}

.footnotes {
    margin-top: 2rem;
    font-size: 0.9rem;
    color: var(--gray);
}

.footnotes ol {
    margin: 0;
    padding-left: 1.2rem;
    list-style-type: decimal;
}

.footnotes li {
    margin: 0.75rem 0;
    padding-left: 0.5rem;
    line-height: 1.5;
}

.footnotes li p {
    margin: 0;
    display: inline;
}

.footnote-back {
    font-size: 0.85rem;
    margin-left: 0.5rem;
    text-decoration: none;
    border-bottom: none;
    color: var(--gray);
    transition: color 0.1s ease;
}

.footnote-back:hover {
    color: var(--red);
    border-bottom: none;
    background-color: transparent;
}

.footnotes li::marker {
    color: var(--gray);
    font-weight: 600;
    font-size: 0.85rem;
}

.footnotes a {
    color: var(--gray);
}

.footnotes a:hover {
    border-bottom: 2px solid var(--gray);
}

/* ---------- NAVIGATION ---------- */
nav {
    padding: 1.5rem 0;
}

nav.nav-top {
    border-top: 2px solid var(--black);
}

nav.nav-bottom {
    border-bottom: 2px solid var(--black);
}

nav p {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    color: var(--gray);
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    margin: 0;
    padding: 0;
}

nav li {
    margin: 0;
    padding: 0;
}

nav a {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.95rem;
    padding: 0.25rem 0;
    border: none;
    background-color: #00000000;
    color: var(--black);
    transition: background-color 0.1s ease;
    transition: color 0.1s ease;
}

nav a:hover {
    color: var(--white);
    background-color: var(--red);
}

/* ---------- HORIZONTAL RULE ---------- */
hr {
    border: none;
    border-top: 1px solid var(--gray-light);
    margin: 2.5rem 0;
}

/* ---------- BUTTONS / CALL-OUTS ---------- */
.button,
strong > a {
    font-weight: 800;
    text-transform: uppercase;
    font-size: 1.1rem;
    padding: 0.4rem 1.2rem;
    background-color: var(--black);
    color: var(--white);
    display: inline-block;
    letter-spacing: 0.03em;
    border-bottom: none;
    transition: background-color 0.1s ease;
}

.button:hover,
strong > a:hover {
    background-color: var(--red);
    color: var(--white);
    border-bottom: none;
}

/* ---------- IMAGES ---------- */
img {
    max-width: 100%;
    height: auto;
    margin: 2rem 0;
    filter: grayscale(100%);
    border: 1px solid var(--gray-light);
    transition: filter 0.1s ease;
}

img:hover {
    filter: grayscale(0%);
}

p > img {
    margin: 0;
}

/* ---------- QUOTES ---------- */
blockquote {
    margin: 1.5rem 0;
    padding: 0rem 2rem;
    background-color: var(--white);
    border-left: 4px solid var(--gray);
    font-style: italic;
    color: var(--gray-dark);
}

/* ---------- LISTS ---------- */
ul,
ol {
    margin: 1.5rem 0;
    padding-left: 1.5rem;
}

li {
    margin: 0.5rem 0;
}

/* ---------- DURATION BADGES ---------- */
.duration,
a + em {
    background-color: var(--gray-light);
    color: var(--gray-dark);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    padding: 0.2rem 0.5rem;
    font-style: normal;
    letter-spacing: 0.02em;
    word-break: keep-all;
}
/* ---------- DIVE DETAILS ---------- */
details.dive {
    margin: 1.5rem 0;
    border: 2px solid var(--gray-light);
    font-size: 0.95rem;
}

details.dive summary {
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--gray-dark);
    cursor: pointer;
    padding: 0.8rem 1.2rem;
    transition: background-color 0.1s ease;
}

details.dive summary:hover {
    background-color: var(--gray-light);
}

details.dive[open] summary {
    border-bottom: 2px solid var(--gray-light);
    margin-bottom: 1rem;
    background-color: var(--gray-light);
}


details.dive ul,
details.dive ol,
details.dive p {
    margin: 0.5rem 0 1rem 0;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
    list-style-type: none;
}

details.dive li {
    margin: 0.5rem 0;
    color: var(--gray-dark);
}

/* ---------- RESPONSIVE ADJUSTMENTS ---------- */
/* @media (max-width: 600px) {
    body {
        padding: 2rem 1rem;
    }

    h1 {
        font-size: 2.4rem;
    }

    h2 {
        font-size: 1.8rem;
    }

    h3 {
        font-size: 1.3rem;
    }

    nav ul {
        flex-direction: column;
        gap: 0.5rem;
    }

    .button,
    a + em {
        display: block;
        text-align: center;
    }
}
*/

@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}