/* Sphere Construction — mock site styles */

:root {
  --ink: #141a21;
  --ink-soft: #1f2730;
  --accent: #c3c8ce;
  --accent-deep: #12356b;
  --paper: #ffffff;
  --stone: #f1f3f5;
  --silver: #b9bec4;
  --text: #333333;
  --muted: #646b73;
  --line: rgba(120, 132, 145, 0.4);
  --display: "Forum", "Times New Roman", serif;
  --body: "Poppins", "Helvetica Neue", Arial, sans-serif;
  --header-h: 104px;
  --wrap: 1240px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--text);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.25;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0 0 1.2em; }
p:last-child { margin-bottom: 0; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 32px;
}

.eyebrow {
  font-family: var(--display);
  font-variant: small-caps;
  font-size: 19px;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.title {
  font-size: clamp(26px, 3.2vw, 40px);
  text-transform: uppercase;
}

.lead {
  max-width: 820px;
  margin: 22px auto 0;
}

.center { text-align: center; }

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

.btn {
  display: inline-block;
  padding: 15px 34px;
  border: 2px solid currentColor;
  font-family: var(--body);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: transparent;
  color: inherit;
  cursor: pointer;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}
.btn:hover, .btn:focus-visible { background: var(--accent); border-color: var(--accent); color: var(--ink); }
.btn--accent { border-color: var(--accent-deep); color: var(--accent-deep); }
.btn--accent:hover, .btn--accent:focus-visible { background: var(--accent-deep); border-color: var(--accent-deep); color: #fff; }
.btn--solid { background: var(--accent); border-color: var(--accent); color: var(--ink); }
.btn--solid:hover, .btn--solid:focus-visible { background: transparent; color: var(--accent); }

.btn-row { display: flex; flex-wrap: wrap; gap: 18px; }
.center .btn-row, .btn-row.center { justify-content: center; }

/* ---------- Header ---------- */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--header-h);
  color: #fff;
  transition: background 0.3s, box-shadow 0.3s, height 0.3s;
}
.site-header.is-solid {
  background: var(--ink);
  box-shadow: 0 2px 18px rgba(0, 0, 0, 0.35);
  --header-h: 90px;
}
.site-header__inner {
  height: 100%;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 0 32px;
}
.nav { display: flex; justify-content: space-evenly; gap: 20px; }
.nav a {
  font-family: var(--display);
  font-size: 18px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.2s;
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--accent); border-color: var(--accent); }

.logo { display: flex; flex-direction: column; align-items: center; gap: 6px; line-height: 1; color: #fff; }
.logo img { width: 55px; height: 55px; transition: width 0.3s, height 0.3s; }
.logo__text { display: flex; flex-direction: column; align-items: center; }
.site-header.is-solid .logo { gap: 4px; }
.site-header.is-solid .logo img { width: 36px; height: 36px; }
.logo__name { font-family: var(--display); font-size: 22px; letter-spacing: 0.22em; padding-left: 0.22em; }
.logo__sub {
  margin-top: 5px;
  /* The left padding balances the letter-spacing after the last letter, so the word sits centred. */
  padding-left: 0.42em;
  font-size: 9.5px; letter-spacing: 0.42em; text-transform: uppercase; color: var(--silver);
}

.menu-toggle {
  display: none;
  justify-self: end;
  width: 44px; height: 44px;
  background: none; border: 0; cursor: pointer;
  color: #fff;
}
.menu-toggle span { display: block; width: 26px; height: 2px; margin: 6px auto; background: currentColor; transition: transform 0.25s, opacity 0.25s; }
.menu-open .menu-toggle span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.menu-open .menu-toggle span:nth-child(2) { opacity: 0; }
.menu-open .menu-toggle span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

.mobile-menu {
  position: fixed; inset: 0; z-index: 40;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 22px;
  background: var(--ink);
  color: #fff;
  opacity: 0; visibility: hidden;
  transition: opacity 0.25s, visibility 0.25s;
}
.menu-open .mobile-menu { opacity: 1; visibility: visible; }
.mobile-menu a { font-family: var(--display); font-size: 22px; letter-spacing: 0.14em; text-transform: uppercase; }
.mobile-menu a[aria-current="page"] { color: var(--accent); }

/* ---------- Cover (the photo banner at the top of each page) ---------- */

.cover {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  padding: calc(var(--header-h) + 40px) 0 90px;
  color: #fff;
  background: var(--ink) center / cover no-repeat;
}
.cover::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(14, 18, 24, 0.72) 0%, rgba(14, 18, 24, 0.25) 35%, rgba(14, 18, 24, 0.7) 100%);
}
.cover > .wrap { position: relative; }
.cover__box {
  display: inline-block;
  max-width: 720px;
  padding: 26px 30px;
  background: rgba(30, 37, 46, 0.86);
  margin-bottom: 30px;
}
.cover__kicker { font-family: var(--display); font-size: 21px; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 10px; }
.cover__title { font-size: clamp(30px, 4.4vw, 50px); text-transform: uppercase; }
.cover__text { font-family: var(--display); font-variant: small-caps; font-size: 23px; line-height: 1.5; margin-top: 14px; text-wrap: pretty; }

/* Home cover: a wide text box centred on the page, 160px above the cover's
   bottom edge, with the buttons centred beneath it. */
@media (min-width: 641px) {
  .cover { padding-bottom: 66px; }
  .cover > .wrap { max-width: none; padding: 0 64px; display: flex; flex-direction: column; align-items: center; }
  .cover__box { max-width: 900px; margin-bottom: 37px; text-align: center; }
  .cover .btn-row { gap: 20px; justify-content: center; }
}

.page-cover {
  position: relative;
  min-height: 32vh;
  display: flex; align-items: flex-end;
  padding: calc(var(--header-h) + 60px) 0 64px;
  color: #fff;
  background: var(--ink) center / cover no-repeat;
}
.page-cover::before { content: ""; position: absolute; inset: 0; background: rgba(14, 18, 24, 0.68); }
.page-cover > .wrap { position: relative; }
.page-cover h1 { font-size: clamp(32px, 5vw, 56px); text-transform: uppercase; }
.page-cover p { max-width: 640px; margin-top: 14px; }
.page-cover .eyebrow { color: var(--accent); }

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

.section { padding: 96px 0; }
.section--dark { background: var(--ink); color: #fff; }
.section--stone { background: var(--stone); }
.section--dark .eyebrow { color: var(--accent); }
.section__head { margin-bottom: 56px; }

/* Image tiles with overlaid label */
.tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.tile {
  position: relative;
  display: flex; align-items: center; justify-content: center;
  aspect-ratio: 3 / 4.4;
  overflow: hidden;
  background: var(--ink-soft);
  color: #fff;
  text-align: center;
}
.tile img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.tile::after { content: ""; position: absolute; inset: 0; background: rgba(14, 18, 24, 0.42); transition: background 0.3s; }
.tile:hover img { transform: scale(1.06); }
.tile:hover::after { background: rgba(14, 18, 24, 0.62); }
.tile__label { position: relative; z-index: 1; padding: 0 16px; }
.tile__label h3 { font-size: 23px; text-transform: uppercase; }
.tile__label span {
  display: block; margin-top: 10px;
  font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent);
  opacity: 0; transform: translateY(6px); transition: opacity 0.3s, transform 0.3s;
}
.tile:hover .tile__label span, .tile:focus-visible .tile__label span { opacity: 1; transform: none; }

/* Split image / text */
.split { display: grid; grid-template-columns: 5fr 6fr; gap: 72px; align-items: center; }
.split--flip > :first-child { order: 2; }
.split__media { background: var(--stone); }
.split__media img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; }
.split__media--wide img { aspect-ratio: 4 / 3; }
.split h2 { font-size: clamp(24px, 2.6vw, 32px); text-transform: uppercase; margin-bottom: 4px; }
.split .sub { font-family: var(--display); font-variant: small-caps; font-size: 19px; color: var(--accent-deep); margin-bottom: 22px; }
.split .btn { margin-top: 28px; }

.checklist { list-style: none; margin: 20px 0 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 6px 24px; }
.checklist li { position: relative; padding-left: 22px; font-size: 14px; }
.checklist li::before { content: ""; position: absolute; left: 0; top: 0.75em; width: 10px; height: 1px; background: var(--accent-deep); }

.service-row + .service-row { margin-top: 110px; }
.service-row { scroll-margin-top: 120px; }

/* Bordered feature cards */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.card {
  padding: 30px 26px 34px;
  background: #fff;
  color: var(--text);
  border: 5px solid var(--accent);
}
.card h3 { font-size: 21px; text-transform: uppercase; margin-bottom: 14px; }
.card p { font-size: 14px; line-height: 1.75; }

/* Numbered points: a heading block on the left, a numbered list on the right */
.points { display: grid; grid-template-columns: 5fr 7fr; gap: 88px; align-items: start; }
.points__head { position: sticky; top: 130px; }
.points__head .title { margin-bottom: 20px; }
.points__head p:not(.eyebrow) { max-width: 44ch; color: rgba(255, 255, 255, 0.82); }
.points__head .btn { margin-top: 32px; }
.points__list { list-style: none; margin: 0; padding: 0; counter-reset: point; }
.points__list li {
  counter-increment: point;
  display: grid; grid-template-columns: 96px 1fr; gap: 24px; align-items: start;
  padding: 34px 0;
  border-top: 1px solid rgba(195, 200, 206, 0.28);
}
.points__list li:last-child { border-bottom: 1px solid rgba(195, 200, 206, 0.28); }
.points__list li::before {
  content: counter(point, decimal-leading-zero);
  font-family: var(--display); font-size: 58px; line-height: 0.9; color: var(--accent);
}
.points__list h3 { font-size: 24px; text-transform: uppercase; margin-bottom: 10px; }
.points__list p { font-size: 14px; line-height: 1.8; color: rgba(255, 255, 255, 0.82); max-width: 58ch; }

/* Testimonials */
.quotes {
  position: relative;
  padding: 120px 0;
  color: #fff;
  text-align: center;
  background: var(--ink) center / cover no-repeat;
}
.quotes::before { content: ""; position: absolute; inset: 0; background: rgba(14, 18, 24, 0.8); }
.quotes > .wrap { position: relative; }
.quotes__head { display: inline-block; padding: 20px 44px; background: rgba(44, 52, 62, 0.85); margin-bottom: 44px; }
.quotes__head h2 { font-size: 22px; text-transform: uppercase; }
.quotes__head p { font-size: 13px; margin-top: 6px; }
.quote { display: none; max-width: 860px; margin: 0 auto; }
.quote.is-active { display: block; animation: fade 0.5s ease; }
.quote blockquote { margin: 0 0 22px; font-size: 17px; line-height: 1.9; }
.quote cite { font-family: var(--display); font-style: normal; font-size: 17px; letter-spacing: 0.1em; color: var(--accent); }
.quote small { display: block; margin-top: 4px; font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; opacity: 0.75; }
.quotes__nav { display: flex; justify-content: center; align-items: center; gap: 14px; margin-top: 40px; }
.arrow {
  width: 46px; height: 46px;
  border: 1px solid #fff; background: transparent; color: #fff;
  font-size: 18px; cursor: pointer; transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.arrow:hover, .arrow:focus-visible { background: var(--accent); border-color: var(--accent); color: var(--ink); }

@keyframes fade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* Projects */
.projects { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.project {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--ink-soft);
  color: #fff;
}
.project img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.project::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(14, 18, 24, 0) 40%, rgba(14, 18, 24, 0.85) 100%); }
.project:hover img { transform: scale(1.05); }
.project__info { position: absolute; left: 22px; right: 22px; bottom: 18px; z-index: 1; }
.project__info h3 { font-size: 19px; text-transform: uppercase; }
.project__info p { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; margin: 4px 0 0; }
.project__tag {
  position: absolute; top: 16px; left: 16px; z-index: 1;
  padding: 4px 12px;
  background: var(--accent); color: var(--ink);
  font-size: 11px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
}
.project[hidden] { display: none; }

.filters { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 44px; }
.filter {
  padding: 10px 22px;
  border: 1px solid var(--line); background: transparent; color: var(--text);
  font-family: var(--body); font-size: 12px; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase;
  cursor: pointer; transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.filter:hover { border-color: var(--accent-deep); }
.filter.is-active { background: var(--ink); border-color: var(--ink); color: #fff; }

/* Process steps */
.steps { counter-reset: step; max-width: 900px; margin: 0 auto; }
.step {
  counter-increment: step;
  display: grid; grid-template-columns: 110px 1fr; gap: 28px;
  padding: 38px 0;
  border-top: 1px solid var(--line);
}
.step:last-child { border-bottom: 1px solid var(--line); }
.step::before { content: counter(step, decimal-leading-zero); font-family: var(--display); font-size: 54px; line-height: 1; color: var(--accent); }
.step h3 { font-size: 22px; text-transform: uppercase; margin-bottom: 10px; }
.step .when { font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent-deep); margin-top: 12px; }

.faq { max-width: 900px; margin: 0 auto; }
.faq details { border-top: 1px solid rgba(255, 255, 255, 0.18); }
.faq details:last-child { border-bottom: 1px solid rgba(255, 255, 255, 0.18); }
.faq summary {
  display: flex; justify-content: space-between; align-items: center; gap: 20px;
  padding: 22px 0;
  font-family: var(--display); font-size: 18px; letter-spacing: 0.06em;
  cursor: pointer; list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 24px; color: var(--accent); transition: transform 0.2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 40px 24px 0; font-size: 14px; opacity: 0.85; }

/* Team */
.team { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.member { text-align: center; }
.member__photo {
  display: flex; align-items: center; justify-content: center;
  aspect-ratio: 1; margin-bottom: 18px;
  background: var(--ink); color: var(--accent);
  font-family: var(--display); font-size: 44px; letter-spacing: 0.08em;
  border: 5px solid var(--accent);
}
.member h3 { font-size: 18px; text-transform: uppercase; }
.member p { font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-deep); }

/* Review cards */
.reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.review { margin: 0; padding: 32px 28px; background: #fff; border: 1px solid var(--line); display: flex; flex-direction: column; }
.review .stars { color: var(--accent-deep); letter-spacing: 0.3em; margin-bottom: 14px; }
.review blockquote { margin: 0 0 22px; font-size: 14px; flex: 1; }
.review cite { font-family: var(--display); font-style: normal; font-size: 16px; letter-spacing: 0.08em; }
.review small { display: block; font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }

/* CTA band */
.cta {
  position: relative;
  padding: 130px 0;
  color: #fff; text-align: center;
  background: var(--ink) center / cover no-repeat;
}
.cta::before { content: ""; position: absolute; inset: 0; background: rgba(14, 18, 24, 0.72); }
.cta > .wrap { position: relative; }
.cta h2 { font-size: clamp(28px, 3.6vw, 44px); text-transform: uppercase; }
.cta p { max-width: 640px; margin: 18px auto 32px; }

/* Contact */
.contact { display: grid; grid-template-columns: 6fr 4fr; gap: 72px; align-items: start; }
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 11px; font-weight: 600; letter-spacing: 0.16em; text-transform: uppercase; }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid #c8ced4; border-radius: 0;
  background: #fff; color: var(--text);
  font: inherit; font-size: 14px; letter-spacing: 0.02em;
}
.field textarea { min-height: 150px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--accent-deep); outline-offset: 0; border-color: var(--accent-deep); }
.form__note { grid-column: 1 / -1; font-size: 12px; color: var(--muted); }
.form__done { grid-column: 1 / -1; padding: 16px 18px; background: var(--stone); border-left: 4px solid var(--accent-deep); font-size: 14px; }

.info-card { padding: 36px 32px; background: var(--ink); color: #fff; border: 5px solid var(--accent); }
.info-card h3 { font-size: 20px; text-transform: uppercase; color: var(--accent); margin: 26px 0 8px; }
.info-card h3:first-child { margin-top: 0; }
.info-card p, .info-card a { font-size: 14px; }
.info-card a:hover { color: var(--accent); }

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

.site-footer { background: var(--ink); color: #fff; padding: 72px 0 0; font-size: 14px; }
.site-footer__grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 48px; }
.site-footer .logo { flex-direction: row; align-items: center; gap: 14px; }
.site-footer .logo img { width: 66px; height: 66px; }
.site-footer .logo__text { align-items: center; }
.site-footer h4 { font-family: var(--body); font-size: 14px; font-weight: 500; letter-spacing: 0.1em; margin-bottom: 16px; color: var(--accent); }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 8px; }
.site-footer a:hover { color: var(--accent); }
.site-footer__blurb { margin-top: 20px; max-width: 280px; opacity: 0.75; font-size: 13px; }
.site-footer__legal {
  margin-top: 60px; padding: 22px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px;
  font-size: 12px; opacity: 0.7;
}

/* ---------- Scroll reveal ---------- */

.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-in { opacity: 1; transform: none; }

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

/* ---------- Responsive ---------- */

@media (max-width: 1080px) {
  .tiles, .cards, .team { grid-template-columns: repeat(2, 1fr); }
  .tile { aspect-ratio: 4 / 3; }
  .projects, .reviews { grid-template-columns: repeat(2, 1fr); }
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
  .split, .contact { gap: 48px; }
}

@media (max-width: 900px) {
  :root { --header-h: 76px; }
  .site-header.is-solid { --header-h: 76px; } /* the phone header keeps one height when scrolled */
  .site-header__inner { grid-template-columns: 1fr auto; padding: 0 20px; }
  .site-header .nav { display: none; }
  .site-header .logo, .site-header.is-solid .logo { flex-direction: row; gap: 10px; }
  .site-header .logo img, .site-header.is-solid .logo img { width: 44px; height: 44px; }
  .site-header .logo__text { align-items: center; }
  .menu-toggle { display: block; }
  .split, .contact { grid-template-columns: 1fr; }
  .points { grid-template-columns: 1fr; gap: 40px; }
  .points__head { position: static; }
  .split--flip > :first-child { order: 0; }
  .split__media img { aspect-ratio: 4 / 3; }
  .section { padding: 72px 0; }
  .service-row + .service-row { margin-top: 72px; }
}

@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
  .tiles, .cards, .projects, .reviews, .form, .checklist { grid-template-columns: 1fr; }
  .team { grid-template-columns: 1fr 1fr; }
  .site-footer__grid { grid-template-columns: 1fr; gap: 36px; }
  .cover { padding-bottom: 56px; }
  .cover__box { padding: 20px; }
  .cover__kicker { font-size: 18px; }
  .cover__text { font-size: 20px; }
  .step { grid-template-columns: 1fr; gap: 8px; }
  .points__list li { grid-template-columns: 1fr; gap: 10px; padding: 28px 0; }
  .points__list li::before { font-size: 44px; }
  .btn { width: 100%; text-align: center; }
  .quotes__head { padding: 18px 22px; }
}