/* Layout and components for the plain pages, in the style of rustymagnets.com.
   Colours come from css/theme.css, the header from css/nav.css. */

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

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

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

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "Source Sans 3", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    font-size: 1.125rem;   /* Source Sans runs small, so 18px reads like 17px */
    line-height: 1.6;
    overflow-x: hidden;
}

/* The header sticks to the top on these pages. The placeholder keeps its
   space (and colour) while navbar.html loads, so the page does not jump. */
#nav-placeholder {
    position: sticky;
    top: 0;
    z-index: 10000;
    min-height: var(--header-height);
    background: var(--header-bg);
}

#nav-placeholder .site-header {
    position: relative;
}

/* Components set their own display, which would otherwise beat the hidden attribute */
[hidden] {
    display: none !important;
}

img {
    max-width: 100%;
    height: auto;
}

a {
    color: var(--link);
    text-underline-offset: 0.15em;
}

a:hover {
    text-decoration-thickness: 2px;
}

:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

h1, h2, h3, h4 {
    line-height: 1.25;
    margin: 0 0 0.6em;
}

/* Page and section headings in the serif; smaller headings stay in the sans */
h1, h2 {
    font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
    font-weight: 700;
    letter-spacing: -0.01em;
}

h3, h4 {
    font-weight: 600;
}

h2 {
    font-size: clamp(1.6rem, 1.3rem + 1.2vw, 2.1rem);
}

h2::after {
    content: "";
    display: block;
    width: 3rem;
    height: 4px;
    margin-top: 0.4rem;
    border-radius: 2px;
    background: var(--accent);
}

.center h2::after {
    margin-left: auto;
    margin-right: auto;
}

h3 {
    font-size: 1.25rem;
}

p {
    margin: 0 0 1em;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 16px;
}

/* Two widths only, both starting at the container's left edge:
   --measure for running text (about 70 characters a line), and the full
   container for plots, tables and card grids. */
:root {
    --measure: 42rem;
}

.section .container > p {
    max-width: var(--measure);
}

.center {
    text-align: center;
}

.center .container > p {
    margin-left: auto;
    margin-right: auto;
}

/* BUTTONS */

.button {
    display: inline-block;
    padding: 0.6rem 1.15rem;
    border-radius: 999px;
    background: var(--accent);
    color: var(--accent-text);
    font-weight: 600;
    text-decoration: none;
    overflow-wrap: anywhere;
}

.button:hover {
    filter: brightness(1.08);
}

/* Outlined button on page backgrounds */
.button-outline {
    background: transparent;
    color: var(--accent-strong);
    box-shadow: inset 0 0 0 2px var(--accent);
}

button.button {
    border: 0;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
}

.button-ghost {
    background: transparent;
    color: #ffffff;
    box-shadow: inset 0 0 0 2px #ffffff;
}

/* HERO */

.hero {
    position: relative;
    color: #ffffff;
    background: var(--header-bg) url("../media/main_banner_crop.png") center / cover no-repeat;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--hero-overlay);
}

.hero-inner {
    position: relative;
    max-width: 1100px;
    margin: 0 auto;
    padding: clamp(3rem, 8vw, 6rem) 16px;
}

.hero h1 {
    font-size: clamp(2.1rem, 1.4rem + 3.5vw, 3.6rem);
    max-width: 18ch;
}

.hero-lead {
    font-size: clamp(1.1rem, 1rem + 0.6vw, 1.35rem);
    max-width: 40em;
}

.hero-meta {
    opacity: 0.92;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

/* SECTIONS */

.section {
    padding: clamp(2.5rem, 6vw, 4rem) 0;
}

.section-alt {
    background: var(--surface-alt);
}

/* Title band at the top of pages without a hero */
.page-title {
    padding: 2.5rem 0 1rem;
    background: var(--surface-alt);
}

.page-title h1 {
    font-size: clamp(2rem, 1.5rem + 2vw, 2.75rem);
}

.page-title p {
    max-width: var(--measure);
    color: var(--muted);
}

/* CARDS (shared look) */

.feature-card,
.person {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: background-color 0.15s ease, box-shadow 0.15s ease;
}

/* Highlight the card under the pointer, or holding keyboard focus */
.feature-card:focus-within,
.person:focus-within {
    background: var(--surface-hover);
}

@media (hover: hover) {
    .feature-card:hover,
    .person:hover {
        background: var(--surface-hover);
        box-shadow: var(--shadow), 0 6px 18px rgba(0, 0, 0, 0.08);
    }
}

/* FEATURES: two cards across on wide screens, one on phones */

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 420px), 1fr));
    gap: 1.5rem;
    margin-top: 1.75rem;
}

.feature-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* White in both themes, so the screenshots stay readable in dark mode */
.feature-figure {
    aspect-ratio: 16 / 10;
    margin: 0;
    overflow: hidden;
    background: #ffffff;
    border-bottom: 1px solid var(--border);
}

.feature-figure img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 0.75rem;
}

/* Screenshots with empty space below are cropped from the top instead */
.feature-figure-top img {
    object-fit: cover;
    object-position: top left;
    padding: 0;
}

.feature-text {
    padding: 1.25rem 1.5rem 0.5rem;
}

.feature-text p {
    color: var(--muted);
}

/* PEOPLE */

.people-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 420px), 1fr));
    gap: 1.25rem;
    margin-top: 1.75rem;
}

.person {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 1.1rem 1.25rem;
}

.person-photo {
    flex: none;
    width: 88px;
    height: 88px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--surface-alt);
}

.person-text {
    min-width: 0;
}

.person-name {
    font-size: 1.1rem;
    margin-bottom: 0.15rem;
}

.person-role {
    color: var(--accent-strong);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.4rem;
}

.person-description {
    font-size: 0.95rem;
}

.person-description p:last-child {
    margin-bottom: 0;
}

/* Long bios are cut to about four lines until Read more is pressed (see js/site.js) */
.clamp:not(.clamp-open) {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
    line-clamp: 4;
    overflow: hidden;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    margin-top: 0.4rem;
    padding: 0;
    border: 0;
    background: none;
    color: var(--accent-strong);
    font: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
}

.read-more svg {
    transition: transform 0.15s ease;
}

.read-more[aria-expanded="true"] svg {
    transform: rotate(180deg);
}

@media (max-width: 480px) {
    .person {
        flex-direction: column;
    }
}

/* FUNDING */

/* White in both themes, so the coloured logo stays readable in dark mode */
.funder-logo {
    display: inline-block;
    margin-top: 0.5rem;
    padding: 1rem 1.5rem;
    background: #ffffff;
    border-radius: 12px;
}

.funder-logo img {
    display: block;
    width: 220px;
}

/* FOOTER (markup in footer.html) */

.site-footer {
    padding: 2rem 0;
    background: var(--header-bg);
    color: var(--header-text);
    font-size: 0.95rem;
}

.site-footer p {
    margin: 0.25rem 0;
}

.site-footer .footer-small {
    opacity: 0.85;
    font-size: 0.875rem;
}

.site-footer a {
    color: var(--header-text);
}

.site-footer :focus-visible {
    outline-color: #ffffff;
}

/* Three columns on wide screens (contact, site links, links elsewhere), stacked on phones */
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
    gap: 1.5rem 2.5rem;
}

.footer-title {
    font-weight: 700;
    margin-bottom: 0.5rem !important;
}

.site-footer address {
    font-style: normal;
    line-height: 1.6;
}

.footer-links {
    margin: 0;
    padding: 0;
    list-style: none;
}

.footer-links li + li {
    margin-top: 0.3rem;
}

.footer-bottom {
    margin-top: 1.75rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.18);
}