/* ==========================================================================
   Medium C — shared stylesheet
   A single stylesheet is used across all pages (no build step, no framework).
   Sections are ordered: variables > reset > base type > layout helpers >
   header/nav > buttons/forms > page-specific sections > footer > responsive.
   ========================================================================== */

/* ---- Design tokens -------------------------------------------------- */
:root {
  --colour-primary: #2F5DAA;   /* Primary Blue */
  --colour-secondary: #475060; /* Secondary Grey */
  --colour-accent: #8FA3B8;    /* Accent */
  --colour-bg-light: #F5F7F9;  /* Light background */
  --colour-border: #E5E7EB;    /* Borders */
  --colour-white: #FFFFFF;
  --colour-black: #222222;

  --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Helvetica World', Helvetica, Arial, sans-serif;

  --max-width: 1140px;
  --gutter: 1.5rem;

  --radius: 6px;
  --shadow-soft: 0 4px 20px rgba(34, 34, 34, 0.06);

  --transition-fast: 0.2s ease;
  --transition-slow: 0.6s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--colour-black);
  background-color: var(--colour-white);
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  text-decoration: underline;
}

ul,
ol {
  padding-left: 1.25rem;
}

/* Visible, consistent focus state for keyboard users on every interactive element */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--colour-primary);
  outline-offset: 2px;
}

/* Skip link — hidden until focused, first thing in the tab order */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--colour-primary);
  color: var(--colour-white);
  padding: 0.75rem 1.25rem;
  z-index: 1000;
  border-radius: 0 0 var(--radius) 0;
}

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

/* Visually hidden but still available to assistive tech */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---- Typography --------------------------------------------------- */
h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--colour-black);
  margin: 0 0 0.75em;
}

h1 {
  font-size: clamp(2.1rem, 4vw, 3rem);
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

p {
  margin: 0 0 1.25em;
}

.lede {
  font-size: 1.2rem;
  color: var(--colour-secondary);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--colour-primary);
  margin-bottom: 0.75rem;
}

.section-intro {
  max-width: 640px;
  margin: 0 0 2.5rem;
}

/* ---- Layout helpers -------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(3rem, 6vw, 5.5rem);
}

.section--tight {
  padding-block: clamp(2rem, 4vw, 3.5rem);
}

.section--light {
  background-color: var(--colour-bg-light);
}

.section--border-top {
  border-top: 1px solid var(--colour-border);
}

.grid {
  display: grid;
  gap: 2rem;
}

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.text-center {
  text-align: center;
}

.mx-auto {
  margin-inline: auto;
}

/* Simple fade/slide-in used sparingly for a calm, editorial feel */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ---- Buttons ----------------------------------------------------------- */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.btn:hover {
  text-decoration: none;
}

.btn--primary {
  background-color: var(--colour-primary);
  color: var(--colour-white);
  border-color: var(--colour-primary);
}

.btn--primary:hover {
  background-color: #244b8a;
  border-color: #244b8a;
}

.btn--outline {
  background-color: transparent;
  color: var(--colour-primary);
  border-color: var(--colour-primary);
}

.btn--outline:hover {
  background-color: var(--colour-primary);
  color: var(--colour-white);
}

.btn--outline-light {
  background-color: transparent;
  color: var(--colour-white);
  border-color: var(--colour-white);
}

.btn--outline-light:hover {
  background-color: var(--colour-white);
  color: var(--colour-primary);
}

/* ---- Site header / nav -------------------------------------------------- */
.site-header {
  border-bottom: 1px solid var(--colour-border);
  background-color: var(--colour-white);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1.1rem;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--colour-black);
  letter-spacing: 0.01em;
}

.logo:hover {
  text-decoration: none;
  color: var(--colour-primary);
}

.logo span {
  color: var(--colour-primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
  padding: 0.5rem 0.6rem;
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--colour-black);
  margin: 4px 0;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.main-nav__list {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav__list a {
  color: var(--colour-secondary);
  font-weight: 500;
  font-size: 0.98rem;
  padding-block: 0.25rem;
  border-bottom: 2px solid transparent;
}

.main-nav__list a:hover,
.main-nav__list a[aria-current="page"] {
  color: var(--colour-primary);
  text-decoration: none;
  border-bottom-color: var(--colour-primary);
}

.main-nav__list .btn {
  border-bottom: none;
}

/* .main-nav__list a's colour and weight rules would otherwise win (they include the
   <a> type selector) and override the button's white, bold text with the nav link styling */
.main-nav__list a.btn--primary,
.main-nav__list a.btn--primary:hover {
  color: var(--colour-white);
  font-weight: 700;
}

/* ---- Site footer ----------------------------------------------------- */
.site-footer {
  background-color: var(--colour-secondary);
  color: var(--colour-bg-light);
}

.site-footer a {
  color: var(--colour-white);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 2.5rem;
  padding-block: 3.5rem 2rem;
}

.site-footer h2,
.site-footer h3 {
  color: var(--colour-white);
  font-size: 1.05rem;
  margin-bottom: 1rem;
}

.site-footer .logo {
  color: var(--colour-white);
}

.site-footer .logo span {
  color: var(--colour-accent);
}

.site-footer p {
  color: #D6DBE2;
}

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

.site-footer__list li {
  margin-bottom: 0.6rem;
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-block: 1.5rem;
  font-size: 0.85rem;
  color: #B9C1CC;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
}

/* ==========================================================================
   Page-specific sections
   ========================================================================== */

/* ---- Hero (home) ---- */
.hero {
  background-color: var(--colour-bg-light);
  border-bottom: 1px solid var(--colour-border);
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
  padding-block: clamp(3rem, 7vw, 6rem);
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.75rem;
}

.hero__image {
  border-radius: 50%;
  box-shadow: var(--shadow-soft);
  aspect-ratio: 1 / 1;
  object-fit: cover;
  width: 100%;
}

/* ---- Simple page header banner (inner pages) ---- */
.page-header {
  background-color: var(--colour-bg-light);
  border-bottom: 1px solid var(--colour-border);
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.page-header__inner > * {
  max-width: 680px;
}

/* ---- Who we work with: intro text beside a stacked list of tags ---- */
.who-we-work-with {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 3rem;
  /* Items stretch to the row's full height (the default), so the tag list below
     can be spread out with justify-content to match the text column's top and bottom */
}

/* ---- Industry / audience strip ---- */
.audience-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.audience-list--stacked {
  flex-direction: column;
  align-items: stretch;
  justify-content: space-between;
  gap: 0.6rem;
  /* Fills the grid cell (matching the text column's height), then space-between spreads
     the tags so the first and last line up with the top and bottom of that text */
  height: 100%;
}

.audience-list li {
  background-color: var(--colour-white);
  border: 1px solid var(--colour-border);
  border-radius: 999px;
  padding: 0.5rem 1.1rem;
  font-size: 0.92rem;
  color: var(--colour-secondary);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.audience-list li:hover {
  background-color: var(--colour-primary);
  border-color: var(--colour-primary);
  color: var(--colour-white);
}

/* ---- Cards (services teaser, case studies teaser) ---- */
.card {
  background-color: var(--colour-white);
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
  padding: 2rem;
  height: 100%;
}

.card h3 {
  margin-bottom: 0.6rem;
}

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

.card--light {
  background-color: var(--colour-bg-light);
}

/* "What we do" teaser cards: highlight to brand blue on hover, text turns white to stay readable */
.card--hover {
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.card--hover:hover {
  background-color: var(--colour-primary);
  border-color: var(--colour-primary);
  color: var(--colour-white);
}

.card--hover:hover h3,
.card--hover:hover p {
  color: var(--colour-white);
}

/* ---- Founder / "person behind" band ---- */
.founder-band__inner {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 2.75rem;
  align-items: center;
}

.founder-photo {
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  aspect-ratio: 1 / 1;
  object-fit: cover;
  width: 100%;
}

.founder-photo--large {
  aspect-ratio: 4 / 5;
}

.founder-photo--small {
  aspect-ratio: 1 / 1;
  max-width: 220px;
}

.founder-band__quote {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--colour-secondary);
  margin: 0 0 1rem;
}

/* ---- About page founder section ---- */
.founder-section__inner {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 3rem;
  align-items: start;
}

.founder-signature {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  margin-top: 1.5rem;
}

/* ---- Values / process list ---- */
.value-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.75rem;
}

.value-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  align-items: baseline;
}

.value-list .value-number {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  color: var(--colour-accent);
}

/* ---- Process steps (services page) ---- */
.process-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
  display: grid;
  gap: 1.5rem;
}

.process-list li {
  counter-increment: step;
  position: relative;
  padding-left: 3.25rem;
}

.process-list li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background-color: var(--colour-primary);
  color: var(--colour-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
}

/* ---- Testimonial / pull quote ---- */
.pull-quote {
  border-left: 4px solid var(--colour-primary);
  padding-left: 1.5rem;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  color: var(--colour-black);
  margin: 2rem 0;
}

.pull-quote cite {
  display: block;
  font-family: var(--font-body);
  font-style: normal;
  font-size: 0.9rem;
  color: var(--colour-secondary);
  margin-top: 0.75rem;
}

/* ---- Case study cards ---- */
.case-study {
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
  padding: 2.25rem;
  margin-bottom: 2rem;
  background-color: var(--colour-white);
}

.case-study__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.case-study__tag {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--colour-primary);
  background-color: var(--colour-bg-light);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
}

.case-study__results {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 1.5rem 0 0;
  border-top: 1px solid var(--colour-border);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.case-study__results dt {
  font-size: 0.85rem;
  color: var(--colour-secondary);
  margin-bottom: 0.25rem;
}

.case-study__results dd {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--colour-primary);
}

/* ---- CTA band ---- */
.cta-band {
  background-color: var(--colour-primary);
  color: var(--colour-white);
}

.cta-band h2 {
  color: var(--colour-white);
}

.cta-band p {
  color: #DCE6F2;
}

.cta-band__inner {
  text-align: center;
  max-width: 620px;
  margin-inline: auto;
}

/* ---- Forms (contact page) ---- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 0.7fr;
  gap: 3rem;
}

.form-field {
  margin-bottom: 1.4rem;
}

.form-field label {
  display: block;
  font-weight: 700;
  font-size: 0.92rem;
  margin-bottom: 0.4rem;
}

.form-field input,
.form-field textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
  background-color: var(--colour-white);
  color: var(--colour-black);
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--colour-primary);
}

.form-field--required label::after {
  content: " *";
  color: var(--colour-primary);
}

.form-note {
  font-size: 0.85rem;
  color: var(--colour-secondary);
  margin-top: -0.5rem;
  margin-bottom: 1.5rem;
}

/* Honeypot field for Web3Forms — display:none keeps it out of the accessibility
   tree and tab order for real visitors, while bots that fill in every field still trip it */
.honeypot-field {
  display: none;
}

.contact-card {
  background-color: var(--colour-bg-light);
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
  padding: 2rem;
  align-self: start;
}

.contact-card__photo {
  border-radius: var(--radius);
  aspect-ratio: 1 / 1;
  object-fit: cover;
  width: 140px;
  margin-bottom: 1.25rem;
}

.contact-details {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 1.5rem 0 0;
  border-top: 1px solid var(--colour-border);
}

.contact-details li {
  margin-bottom: 0.75rem;
}

.contact-details span {
  display: block;
  font-size: 0.8rem;
  color: var(--colour-secondary);
}

.form-success {
  background-color: var(--colour-bg-light);
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 900px) {
  .hero__inner,
  .founder-band__inner,
  .founder-section__inner,
  .contact-layout,
  .who-we-work-with {
    grid-template-columns: 1fr;
  }

  .hero__image,
  .founder-photo {
    max-width: 420px;
    margin-inline: auto;
  }

  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--colour-white);
    border-bottom: 1px solid var(--colour-border);
    box-shadow: var(--shadow-soft);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-fast);
  }

  .main-nav.is-open {
    max-height: 400px;
  }

  .main-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 1rem var(--gutter) 1.5rem;
  }

  .main-nav__list li {
    width: 100%;
  }

  .main-nav__list a {
    display: block;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--colour-border);
  }

  .main-nav__list a[aria-current="page"] {
    border-bottom: 1px solid var(--colour-border);
  }

  .main-nav__list .btn {
    margin-top: 0.75rem;
    display: inline-block;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    padding-block: 2.5rem 1.5rem;
  }

  .case-study__results {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .case-study {
    padding: 1.5rem;
  }
}