/* =========================================================
   HYDUR Group — design tokens
   Palette & type extracted from hydur.co.uk (Shopify theme):
   ink #121212, paper #FFFFFF, mist #F3F3F3, charcoal #242833,
   accent (used sparingly) #A51C1F. Headings: Bodoni Moda.
   Body: Montserrat.
   ========================================================= */

:root {
  --color-ink: 18, 18, 18;
  --color-paper: 255, 255, 255;
  --color-mist: 243, 243, 243;
  --color-mist-line: 223, 223, 223;
  --color-charcoal: 36, 40, 51;
  --color-charcoal-contrast: 47, 52, 66;
  --color-accent: 165, 28, 31;

  --font-heading: "Bodoni Moda", Georgia, "Times New Roman", serif;
  --font-body: "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --container-max: 1180px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6.5rem;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 400;
  color: rgb(var(--color-ink));
  background-color: rgb(var(--color-paper));
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.15;
  margin: 0 0 var(--space-2);
}

p {
  margin: 0 0 var(--space-2);
}

/* Visible focus states for keyboard navigation */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid rgb(var(--color-ink));
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  background: rgb(var(--color-paper));
  color: rgb(var(--color-ink));
  padding: var(--space-2) var(--space-3);
  border: 1px solid rgb(var(--color-ink));
}

.skip-link:focus {
  left: var(--space-2);
  top: var(--space-2);
}

/* ---------- Layout helpers ---------- */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.section {
  padding-block: var(--space-6);
}

.section--tight {
  padding-block: var(--space-5);
}

.section--mist {
  background-color: rgb(var(--color-mist));
}

.section--charcoal {
  background-color: rgb(var(--color-charcoal));
  color: rgb(var(--color-paper));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgb(var(--color-accent));
  margin-bottom: var(--space-2);
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 2rem;
  height: 1px;
  background: rgb(var(--color-accent));
}

.section--charcoal .eyebrow {
  color: rgb(var(--color-paper) / 0.7);
}

.section--charcoal .eyebrow::before {
  background: rgb(var(--color-paper) / 0.5);
}

h1 {
  font-size: clamp(2.4rem, 5vw + 1rem, 4.2rem);
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(1.8rem, 2.6vw + 1rem, 2.75rem);
}

h3 {
  font-size: clamp(1.25rem, 1.2vw + 1rem, 1.6rem);
}

.lede {
  font-size: clamp(1.05rem, 0.6vw + 1rem, 1.25rem);
  color: rgb(var(--color-ink) / 0.7);
  max-width: 46rem;
}

.section--charcoal .lede {
  color: rgb(var(--color-paper) / 0.75);
}

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

.text-center .lede {
  margin-inline: auto;
}

.measure {
  max-width: 42rem;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.95rem 1.9rem;
  border: 1px solid rgb(var(--color-ink));
  background: rgb(var(--color-ink));
  color: rgb(var(--color-paper));
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
  white-space: nowrap;
}

.btn:hover {
  background: rgb(var(--color-paper));
  color: rgb(var(--color-ink));
}

.btn--secondary {
  background: transparent;
  color: rgb(var(--color-ink));
}

.btn--secondary:hover {
  background: rgb(var(--color-ink));
  color: rgb(var(--color-paper));
}

.section--charcoal .btn {
  border-color: rgb(var(--color-paper));
  background: rgb(var(--color-paper));
  color: rgb(var(--color-ink));
}

.section--charcoal .btn:hover {
  background: transparent;
  color: rgb(var(--color-paper));
}

.section--charcoal .btn--secondary {
  background: transparent;
  color: rgb(var(--color-paper));
}

.section--charcoal .btn--secondary:hover {
  background: rgb(var(--color-paper));
  color: rgb(var(--color-ink));
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 1px solid currentColor;
  padding-bottom: 0.15rem;
  transition: gap 0.2s var(--ease), opacity 0.2s var(--ease);
}

.link-arrow:hover {
  gap: 0.85rem;
  opacity: 0.75;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgb(var(--color-paper));
  border-bottom: 1px solid rgb(var(--color-mist-line));
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1.15rem;
}

.wordmark {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  letter-spacing: 0.06em;
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.wordmark span.sub {
  font-family: var(--font-body);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgb(var(--color-ink) / 0.55);
  margin-top: 0.3rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.main-nav__links {
  display: flex;
  gap: var(--space-4);
}

.main-nav__links a {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding-block: 0.35rem;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.main-nav__links a:hover,
.main-nav__links a[aria-current="page"] {
  border-color: rgb(var(--color-ink));
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.4rem;
  height: 2.4rem;
  border: 1px solid rgb(var(--color-ink));
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 1px;
  background: rgb(var(--color-ink));
  margin-inline: auto;
  width: 1.1rem;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

/* ---------- Footer ---------- */
.site-footer {
  background: rgb(var(--color-charcoal));
  color: rgb(var(--color-paper) / 0.85);
}

.site-footer a:hover {
  color: rgb(var(--color-paper));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-4);
  padding-block: var(--space-5) var(--space-4);
}

.footer-grid .wordmark {
  color: rgb(var(--color-paper));
}

.footer-grid .wordmark span.sub {
  color: rgb(var(--color-paper) / 0.55);
}

.footer-col h4 {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgb(var(--color-paper) / 0.55);
  margin-bottom: var(--space-2);
}

.footer-col ul li {
  margin-bottom: 0.6rem;
  font-size: 0.92rem;
}

.footer-note {
  font-size: 0.9rem;
  color: rgb(var(--color-paper) / 0.65);
  max-width: 26rem;
  margin-top: var(--space-2);
}

.footer-bottom {
  border-top: 1px solid rgb(var(--color-paper) / 0.15);
  padding-block: var(--space-3);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: space-between;
  font-size: 0.8rem;
  color: rgb(var(--color-paper) / 0.55);
}

.footer-bottom a {
  color: rgb(var(--color-paper) / 0.55);
}

/* ---------- Hero ---------- */
.hero {
  padding-block: var(--space-6) var(--space-5);
}

.hero__grid {
  display: grid;
  gap: var(--space-4);
}

/* ---------- Grid systems ---------- */
.grid {
  display: grid;
  gap: var(--space-3);
}

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

.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

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

/* ---------- Cards ---------- */
.card {
  background: rgb(var(--color-paper));
  border: 1px solid rgb(var(--color-mist-line));
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px rgb(var(--color-ink) / 0.08);
}

.card__tag {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgb(var(--color-accent));
  margin-bottom: var(--space-2);
}

.card__mark {
  font-family: var(--font-heading);
  font-size: 1.7rem;
  margin-bottom: 0.6rem;
}

.card p {
  color: rgb(var(--color-ink) / 0.7);
  flex-grow: 1;
}

.card .link-arrow {
  margin-top: var(--space-2);
}

/* Portfolio detail cards (larger, with anchor offset for sticky header) */
.company {
  scroll-margin-top: 6.5rem;
  border: 1px solid rgb(var(--color-mist-line));
  padding: var(--space-5);
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--space-4);
  align-items: center;
}

.company + .company {
  margin-top: var(--space-3);
}

.company__mark {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3vw, 2.8rem);
}

.company__locations {
  font-size: 0.85rem;
  color: rgb(var(--color-ink) / 0.6);
  margin-top: var(--space-2);
}

/* ---------- Values ---------- */
.value {
  border-top: 1px solid rgb(var(--color-mist-line));
  padding-top: var(--space-3);
}

.value__index {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: rgb(var(--color-accent));
  margin-bottom: var(--space-1);
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  align-items: start;
}

.contact-point {
  padding-block: var(--space-2);
  border-bottom: 1px solid rgb(var(--color-mist-line));
}

.contact-point h4 {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgb(var(--color-ink) / 0.55);
  margin-bottom: 0.4rem;
}

.contact-point a {
  font-size: 1.1rem;
  font-weight: 600;
}

.contact-point a:hover {
  text-decoration: underline;
}

.form-field {
  margin-bottom: var(--space-3);
}

.form-field label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  color: rgb(var(--color-ink) / 0.65);
}

.form-field input,
.form-field textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.85rem 1rem;
  border: 1px solid rgb(var(--color-mist-line));
  background: rgb(var(--color-mist));
  color: rgb(var(--color-ink));
}

.form-field textarea {
  min-height: 8rem;
  resize: vertical;
}

.form-note {
  font-size: 0.85rem;
  color: rgb(var(--color-ink) / 0.55);
  margin-top: var(--space-2);
}

/* ---------- Stats strip ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  border-top: 1px solid rgb(var(--color-mist-line));
  border-bottom: 1px solid rgb(var(--color-mist-line));
  padding-block: var(--space-3);
}

.stats dt {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 2vw, 2.2rem);
}

.stats dd {
  margin: 0.3rem 0 0;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgb(var(--color-ink) / 0.55);
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 960px) {
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .company {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

@media (max-width: 720px) {
  .grid--3,
  .grid--2 {
    grid-template-columns: 1fr;
  }

  .stats {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav__links {
    position: fixed;
    inset: 4.4rem 0 0 0;
    background: rgb(var(--color-paper));
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--space-3);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
  }

  .main-nav__links a {
    width: 100%;
    padding-block: var(--space-2);
    border-bottom: 1px solid rgb(var(--color-mist-line));
  }

  .site-header.is-open .main-nav__links {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .site-header.is-open .nav-toggle span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .site-header.is-open .nav-toggle span:nth-child(2) {
    opacity: 0;
  }

  .site-header.is-open .nav-toggle span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

@media (max-width: 560px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
  }
}