/* Generated by scripts/preview-styles.mjs; edit src/styles/global.css. */

/* ==========================================================================
   CTAO Science Portal: content page mockup
   Colours and type follow the CTAO Brand Guidelines (April 2024).
   The editor preview (public/admin/preview.css) is generated from the
   hero, prose and button sections below by scripts/preview-styles.mjs.
   ========================================================================== */

/* Fonts
   ========================================================================== */

@font-face {
  font-family: "Inter";
  font-weight: 400 700;
  font-display: swap;
  src: url("/assets/fonts/inter-latin.woff2") format("woff2");
}

@font-face {
  font-family: "Space Grotesk";
  font-weight: 500 700;
  font-display: swap;
  src: url("/assets/fonts/space-grotesk-latin.woff2") format("woff2");
}

/* Tokens
   ========================================================================== */

:root {
  /* Brand main colours (D.2.1) */
  --galaxy-blue: #00004a;
  --cherenkov-blue: #00e4d8;
  --moon-gray: #f5f5f5;

  /* Brand secondary colours (D.2.2) */
  --white: #ffffff;
  --cosmic-azure: #007aff;
  --interstellar-indigo: #00009c;

  /* Text */
  --text: #111111;
  --text-muted: #555555;
  /* Cosmic Azure at 84% brightness: 5.4:1 on white, 3.5:1 against body text */
  --link: #0066d6;

  /* Type: Inter for everything, Space Grotesk for headlines (D.3) */
  --font-body: "Inter", Arial, sans-serif;
  --font-head: "Space Grotesk", Arial, sans-serif;

  /* Layout */
  --content-width: 85rem;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --header-height: 7rem;
  --header-height-scrolled: 5rem;
  /* Large decorative corners (hero, header, search panel): grows with the
     viewport instead of switching at breakpoints */
  --radius-lg: min(15vw, 180px);
  --radius-sm: 15px;
  /* How far photos are pulled up into the hero */
  --hero-overlap: clamp(6rem, 11.25vw, 9rem);
  /* Dropdown submenus (Example, language) */
  --radius-menu: 8px;
  --transition: 0.3s ease-in-out;

  /* Film grain tile over the hero background, also hides gradient banding */
  --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='.05'/%3E%3C/svg%3E");
}

/* Base
   ========================================================================== */

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

html {
  scroll-padding-top: var(--header-height-scrolled);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

body.no-scroll {
  overflow: hidden;
}

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

a {
  color: var(--link);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

button {
  padding: 0;
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

/* Focus ring: Link blue on light backgrounds, Cherenkov Blue on dark ones */
:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 3px;
}

.site-header :focus-visible,
.page-hero :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--cherenkov-blue);
}

/* Utilities
   ========================================================================== */

.container {
  width: min(100% - 2 * var(--gutter), var(--content-width));
  margin-inline: auto;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -4rem;
  left: 1rem;
  z-index: 100;
  padding: 0.5rem 1rem;
  color: var(--galaxy-blue);
  background: var(--white);
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  top: 1rem;
}

.arrow {
  display: inline-block;
  transition: transform 0.25s ease;
}

a:hover .arrow,
button:hover .arrow {
  transform: translateX(4px);
}

@keyframes panel-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

/* Page hero
   ========================================================================== */

.page-hero {
  margin-top: calc(-1 * var(--header-height));
  padding: calc(var(--header-height) + 3rem) 0 calc(var(--hero-overlap) + 3rem);
  color: var(--white);
  background: var(--grain), var(--galaxy-blue);
  border-bottom-right-radius: var(--radius-lg);
}

/* Pages without a photo: no room needed for the figure to overlap */
.page-hero--compact {
  padding-bottom: 4rem;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 1rem;
  padding: 0;
  font-size: 0.875rem;
  list-style: none;
}

.breadcrumb li + li::before {
  content: "›";
  margin-right: 0.5rem;
  color: rgba(255, 255, 255, 0.5);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a:hover {
  color: var(--white);
}

.breadcrumb [aria-current] {
  font-weight: 500;
  color: var(--white);
}

/* Headline: Space Grotesk medium, white on dark (D.3.4) */
.page-hero__title {
  max-width: 24ch;
  margin: 0 0 1.25rem;
  font-family: var(--font-head);
  font-size: clamp(2rem, 5vw, 3.75rem);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.02em;
  text-wrap: balance;
  overflow-wrap: anywhere;
}

.page-hero__lead {
  max-width: 70ch;
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 500;
  line-height: 1.4;
}

/* Photo pulled up over the hero; flat, no shadow */
.page-figure {
  margin: calc(-1 * var(--hero-overlap)) 0 4rem;
}

.page-figure img {
  width: 100%;
  border-radius: var(--radius-sm);
}

.page-figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Two photos side by side (Home), pulled up over the hero together; they
   stack by themselves once each would be narrower than 18rem */
.page-figures {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
  gap: 1.5rem;
  margin: calc(-1 * var(--hero-overlap)) 0 4rem;
}

.page-figures .page-figure {
  margin: 0;
}

/* Same shape for both photos, whatever the uploads' proportions */
.page-figures img {
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* Prose
   ========================================================================== */

.prose {
  padding-bottom: 5rem;
  overflow-wrap: anywhere;
}

.prose--no-image {
  padding-top: 4rem;
}

.prose > * {
  max-width: 64rem;
}

/* Galaxy Blue headline on light background (D.3.4) */
.prose h2 {
  margin: 3rem 0 1rem;
  font-family: var(--font-head);
  font-size: clamp(1.75rem, 3vw, 2.375rem);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--galaxy-blue);
}

.prose h2:first-child {
  margin-top: 0;
}

.prose p {
  margin: 0 0 1.25rem;
  font-size: 1.0625rem;
  line-height: 1.6;
}

/* Text links: colour only at rest, underline on hover and focus */
.prose a:not(.btn):hover,
.prose a:not(.btn):focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

/* Cherenkov Blue fails contrast as text on white, so it is the accent bar */
.prose .highlight,
.prose blockquote {
  margin: 2.5rem 0;
  padding-left: 1.5rem;
  font-size: 1.375rem;
  font-weight: 500;
  line-height: 1.35;
  color: var(--galaxy-blue);
  border-left: 4px solid var(--cherenkov-blue);
}

.prose blockquote p {
  font-size: inherit;
  line-height: inherit;
}

.prose h3,
.prose h4,
.prose h5,
.prose h6 {
  font-family: var(--font-head);
  color: var(--galaxy-blue);
}

.prose li {
  margin-bottom: 0.5rem;
}

.prose img {
  border-radius: var(--radius-sm);
}

.prose pre {
  padding: 1rem;
  overflow-x: auto;
  background: var(--moon-gray);
}

.prose code {
  overflow-wrap: normal;
}

.prose table {
  display: block;
  overflow-x: auto;
  border-collapse: collapse;
}

.prose th,
.prose td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid #ddd;
}

.prose hr {
  margin: 2rem 0;
  border: 0;
  border-top: 1px solid #ddd;
}

/* Placeholder pages: empty body until their content exists */
.placeholder-body {
  min-height: 12rem;
}

/* Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  height: 2.75rem;
  padding: 0 1.5rem;
  font-size: 0.9375rem;
  font-weight: 700;
  border-radius: 999px;
}

/* Underline the label only: a flex container would pass it on to the arrow */
.btn:hover,
.btn:focus-visible {
  text-decoration: none;
}

.btn:hover .btn__label,
.btn:focus-visible .btn__label {
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.btn--primary {
  color: var(--white);
  background: linear-gradient(
    90deg,
    var(--galaxy-blue) 0%,
    var(--cosmic-azure) 70%,
    var(--cherenkov-blue) 100%
  );
}

.btn--primary:hover {
  filter: brightness(1.1);
}

/* Preferences
   ========================================================================== */

/* Windows High Contrast: drop the decorative hero background behind system text */
@media (forced-colors: active) {
  .page-hero {
    background-image: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

/* Preview frame
   ========================================================================== */

/* There is no site header above the hero */
.page-hero {
  margin-top: 0;
  padding-top: 3rem;
}