/* ==========================================================================
   Layout and components. No colours or font names in this file:
   they all come from the variables in theme.css.
   ========================================================================== */

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

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

body {
  margin: 0;
  background: var(--bg-page);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  overflow-wrap: break-word;
}

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

h1,
h2,
h3 {
  margin: 0 0 0.5em;
  color: var(--text-heading);
  font-family: var(--font-heading);
  font-weight: var(--heading-weight);
  letter-spacing: var(--heading-tracking);
  line-height: 1.15;
}

h1 {
  font-size: clamp(2.25rem, 5.5vw, 3.75rem);
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
}

h3 {
  font-size: 1.25rem;
  line-height: 1.3;
}

p {
  margin: 0 0 1em;
}

a {
  color: var(--accent-2-text);
  text-underline-offset: 0.18em;
}

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

:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
  border-radius: 4px;
}

ul {
  padding-left: 1.25em;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition: none !important;
  }
}

/* Utilities ---------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

.container--narrow {
  max-width: 760px;
}

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

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 700;
  border-radius: 0 0 8px 8px;
}

.skip-link:focus {
  top: 0;
}

/* Header and navigation ---------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg-header);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--card-border);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  margin-right: auto;
  color: var(--text-heading);
  text-decoration: none;
  line-height: 1.2;
}

.brand__name {
  display: block;
  font-family: var(--font-heading);
  font-weight: var(--heading-weight);
  font-size: 1.3rem;
  letter-spacing: var(--heading-tracking);
}

.brand__role {
  display: block;
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  display: inline-block;
  padding: 8px 12px;
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-btn);
}

.site-nav a:hover {
  background: var(--accent-2-soft);
}

.site-nav a[aria-current="page"] {
  color: var(--accent-2-text);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.35em;
}

.site-nav .nav-cta {
  margin-left: 6px;
  padding: 8px 18px;
  background: var(--accent);
  color: var(--on-accent);
}

.site-nav .nav-cta:hover,
.site-nav .nav-cta[aria-current="page"] {
  background: var(--accent-hover);
  color: var(--on-accent);
}

/* Theme switch: shows the icon of the theme it switches to. */
.theme-switch {
  display: none;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--card-border);
  border-radius: 50%;
  background: transparent;
  color: var(--text-heading);
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.js .theme-switch {
  display: inline-flex;
}

.theme-switch:hover {
  background: var(--accent-2-soft);
}

.theme-switch__icon {
  width: 22px;
  height: 22px;
}

.theme-switch__icon--leaf {
  display: var(--switch-icon-leaf);
}

.theme-switch__icon--wave {
  display: var(--switch-icon-wave);
}

@media (max-width: 560px) {
  /* Phones: name and theme switch on the first row, links below. */
  .theme-switch {
    order: 1;
  }

  .site-nav {
    order: 2;
    width: 100%;
  }

  .site-nav ul {
    justify-content: space-between;
  }

  .site-nav a {
    padding: 8px 6px;
    font-size: 0.9375rem;
  }

  /* On phones the "Book a visit" button gets its own full-width row. */
  .site-nav li:last-child {
    flex-basis: 100%;
  }

  .site-nav .nav-cta {
    display: block;
    margin: 4px 0 0;
    padding: 10px 12px;
    text-align: center;
  }
}

/* Buttons ------------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 24px;
  border: 2px solid transparent;
  border-radius: var(--radius-btn);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--accent);
}

/* Pin the text colour in every state so no section's link colour can override it. */
.btn--primary,
.btn--primary:link,
.btn--primary:visited,
.btn--primary:hover,
.btn--primary:focus,
.btn--primary:active {
  color: var(--on-accent);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--accent-hover);
}

.btn--secondary {
  background: transparent;
  border-color: currentColor;
}

.btn--secondary,
.btn--secondary:link,
.btn--secondary:visited,
.btn--secondary:hover,
.btn--secondary:focus,
.btn--secondary:active {
  color: var(--text-heading);
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
  background: var(--accent-2-soft);
}

/* Outline buttons on the hero and page headers (dark in forest, light in ocean). */
.hero .btn--secondary,
.hero .btn--secondary:link,
.hero .btn--secondary:visited,
.hero .btn--secondary:hover,
.hero .btn--secondary:focus,
.hero .btn--secondary:active,
.page-header .btn--secondary,
.page-header .btn--secondary:link,
.page-header .btn--secondary:visited,
.page-header .btn--secondary:hover,
.page-header .btn--secondary:focus,
.page-header .btn--secondary:active {
  color: var(--text-hero);
}

.hero .btn--secondary:hover,
.hero .btn--secondary:focus-visible,
.page-header .btn--secondary:hover,
.page-header .btn--secondary:focus-visible {
  background: var(--hero-btn-hover);
}

/* Outline buttons on dark sections and the footer. */
.on-dark .btn--secondary,
.on-dark .btn--secondary:link,
.on-dark .btn--secondary:visited,
.on-dark .btn--secondary:hover,
.on-dark .btn--secondary:focus,
.on-dark .btn--secondary:active {
  color: var(--text-on-dark);
}

.on-dark .btn--secondary:hover,
.on-dark .btn--secondary:focus-visible {
  background: var(--bg-dark-card);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 1.5rem;
}

/* Sections ----------------------------------------------------------------- */

.section {
  padding: clamp(56px, 8vw, 96px) 0;
}

.section--a {
  background: var(--bg-section-a);
}

.section--b {
  background: var(--bg-section-b);
}

.section--c {
  background: var(--bg-section-c);
}

.on-dark {
  background: var(--bg-dark);
  color: var(--text-on-dark);
}

.on-dark h2,
.on-dark h3 {
  color: var(--text-on-dark);
}

.on-dark a:not(.btn) {
  color: var(--accent-on-dark);
}

.on-dark :focus-visible {
  outline-color: var(--focus-ring-on-dark);
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent-text);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.on-dark .eyebrow {
  color: var(--accent-on-dark);
}

.hero .eyebrow {
  color: var(--accent-on-hero);
}

.section-intro {
  max-width: 680px;
  margin-bottom: 2.5rem;
}

.lead {
  font-size: 1.1875rem;
  color: var(--text-muted);
}

.on-dark .lead,
.on-dark .muted {
  color: var(--text-on-dark-muted);
}

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

.small {
  font-size: 0.9375rem;
}

/* Page header (inner pages) ------------------------------------------------ */

.page-header {
  padding: clamp(48px, 7vw, 80px) 0 clamp(40px, 6vw, 64px);
  background: var(--bg-hero);
  color: var(--text-hero);
}

.page-header h1 {
  color: var(--text-hero);
  font-size: clamp(2rem, 4.5vw, 3rem);
}

.page-header .lead {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--text-hero-muted);
}

.page-header .eyebrow {
  color: var(--accent-on-hero);
}

/* Hero --------------------------------------------------------------------- */

.hero {
  padding: clamp(48px, 8vw, 104px) 0;
  background: var(--bg-hero);
  color: var(--text-hero);
}

.hero__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

@media (min-width: 860px) {
  .hero__grid {
    grid-template-columns: 1.35fr 1fr;
    gap: 64px;
  }
}

.hero h1 {
  color: var(--text-hero);
}

.hero .lead {
  max-width: 600px;
  color: var(--text-hero-muted);
}

.hero__credential {
  margin-top: 1.75rem;
  font-size: 0.9375rem;
  color: var(--text-hero-muted);
}

/* Photo -------------------------------------------------------------------- */

.photo {
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius-photo);
  background: var(--accent-2-soft);
}

.photo--small {
  max-width: 320px;
}

/* Cards -------------------------------------------------------------------- */

.grid {
  display: grid;
  gap: 20px;
}

@media (min-width: 640px) {
  .grid--2,
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.card {
  padding: 28px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-card);
  box-shadow: var(--card-shadow);
}

.card > :last-child {
  margin-bottom: 0;
}

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

.card--accent {
  border-left: 5px solid var(--accent);
}

.on-dark .card {
  background: var(--bg-dark-card);
  border-color: var(--dark-card-border);
  box-shadow: none;
}

.on-dark .card p {
  color: var(--text-on-dark-muted);
}

.on-dark .card--accent {
  border-left-color: var(--accent);
}

.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  border-radius: 14px;
  background: var(--accent-2-soft);
  color: var(--accent-2-text);
}

.icon svg {
  width: 26px;
  height: 26px;
}

.card__meta {
  margin-bottom: 0.75rem;
  color: var(--accent-text);
  font-size: 0.875rem;
  font-weight: 700;
}

.on-dark .card__meta {
  color: var(--accent-on-dark);
}

/* Two-column text + media -------------------------------------------------- */

.split {
  display: grid;
  gap: 40px;
  align-items: center;
}

@media (min-width: 860px) {
  .split {
    grid-template-columns: 1fr 1.4fr;
    gap: 64px;
  }
}

/* Lists -------------------------------------------------------------------- */

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

.check-list li {
  position: relative;
  margin-bottom: 0.9rem;
  padding-left: 32px;
}

.check-list li::before {
  content: "";
  position: absolute;
  top: 0.55em;
  left: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
}

.details {
  margin: 1rem 0 0;
}

.details div {
  margin-bottom: 0.75rem;
}

.details dt {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-text);
}

.on-dark .details dt {
  color: var(--accent-on-dark);
}

.details dd {
  margin: 0;
}

/* Talk entries ------------------------------------------------------------- */

.talk {
  display: grid;
  gap: 24px;
}

@media (min-width: 860px) {
  .talk {
    grid-template-columns: 1.5fr 1fr;
    gap: 40px;
  }
}

.talk h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.talk__subtitle {
  display: block;
  margin-top: 0.25em;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.6em;
  font-weight: 600;
  letter-spacing: 0;
}

.tag {
  display: inline-block;
  margin: 0 6px 6px 0;
  padding: 4px 12px;
  border-radius: var(--radius-btn);
  background: var(--accent-2-soft);
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
}

/* Notice box --------------------------------------------------------------- */

.notice {
  padding: 18px 22px;
  border-radius: var(--radius-card);
  background: var(--accent-soft);
  color: var(--text);
}

.notice > :last-child {
  margin-bottom: 0;
}

/* CTA band ----------------------------------------------------------------- */

.cta {
  text-align: center;
}

.cta .section-intro {
  margin: 0 auto;
}

.cta .btn-row {
  justify-content: center;
}

/* Footer ------------------------------------------------------------------- */

.site-footer {
  padding: 56px 0 32px;
  font-size: 0.9375rem;
}

.site-footer__grid {
  display: grid;
  gap: 32px;
}

@media (min-width: 760px) {
  .site-footer__grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

.site-footer h2 {
  margin-bottom: 0.75rem;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-on-dark);
}

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

.site-footer li {
  margin-bottom: 0.4rem;
}

.site-footer__name {
  margin-bottom: 0.25rem;
  font-family: var(--font-heading);
  font-weight: var(--heading-weight);
  font-size: 1.25rem;
}

.site-footer__disclaimer {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--dark-card-border);
  color: var(--text-on-dark-muted);
}

.site-footer__disclaimer p {
  margin-bottom: 0.5rem;
}