:root {
  --bg: #0c3444;
  --bg-deep: #071820;
  --olive: #485f31;
  --navy: #002b69;
  --text: #f4f6f5;
  --muted: #b7c4c2;
  --accent: #d5e3b4;
  --shadow: #0c3444;
  --radius: 24px;
  --max: 1120px;
  --font: "Inter", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-weight: 400;
  color: var(--text);
  background: var(--bg-deep);
  line-height: 1.5;
}

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

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

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3 {
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 0.75rem;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

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

p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 200px;
  padding: 0.9rem 1.4rem;
  border: 0;
  border-radius: 999px;
  background: var(--accent);
  color: var(--bg-deep);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}

.button:hover {
  text-decoration: none;
  filter: brightness(1.05);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: linear-gradient(42deg, #000 0%, var(--olive) 50%, var(--navy) 100%);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 0;
}

.logo img {
  width: 148px;
}

.site-nav {
  display: flex;
  gap: 1.5rem;
}

.site-nav a {
  color: var(--text);
  font-weight: 600;
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.menu-button span {
  display: block;
  height: 2px;
  margin: 6px 8px;
  background: var(--text);
}

.hero {
  position: relative;
  padding: 4.5rem 0;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-color: #173c36;
  background-image:
    linear-gradient(rgba(17, 34, 41, 0.78), rgba(17, 34, 41, 0.78)),
    url("/images/math-background.png?v=2");
  background-position: center;
  background-size: auto, contain;
  background-repeat: no-repeat;
}

.hero-grid,
.about-grid,
.contact-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
}

.hero-photo img,
.about-photo img {
  width: min(100%, 402px);
  margin-left: auto;
  border-radius: var(--radius);
  box-shadow: -24px -24px 0 0 var(--shadow);
}

.about,
.prices {
  padding: 5rem 0;
  background: linear-gradient(42deg, #000 0%, var(--olive) 50%, var(--navy) 100%);
}

.about-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.about-list h3 {
  font-size: 1.15rem;
}

.services,
.contact {
  padding: 5rem 0;
  background: var(--bg);
}

.section-lead {
  margin-bottom: 2rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.card {
  padding: 2rem 1.5rem;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
}

.price {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  margin: 0.5rem 0;
}

.reviews {
  padding: 5rem 0;
  background: var(--bg-deep);
}

.reviews-slider {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
}

.reviews-viewport {
  grid-column: 2;
  min-width: 0;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
}

.reviews-viewport::-webkit-scrollbar {
  display: none;
}

.reviews-track {
  display: flex;
  gap: 1.25rem;
}

.review-card {
  flex: 0 0 calc((100% - 2.5rem) / 3);
  display: grid;
  grid-template-rows: 1fr auto;
  place-items: center;
  min-width: 0;
  min-height: 420px;
  margin: 0;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  scroll-snap-align: start;
}

.review-card img {
  width: auto;
  max-width: 100%;
  max-height: 392px;
  object-fit: contain;
  object-position: center;
  border-radius: 16px;
  background: #fff;
  cursor: zoom-in;
}

.reviews-arrow {
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg-deep);
  cursor: pointer;
  position: relative;
}

.reviews-arrow::before {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 10px;
  height: 10px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
}

.reviews-arrow-prev::before {
  transform: translateX(2px) rotate(-135deg);
}

.reviews-arrow-next::before {
  transform: translateX(-2px) rotate(45deg);
}

.reviews-arrow:disabled {
  opacity: 0.35;
  cursor: default;
}

.reviews-arrow-prev { grid-column: 1; grid-row: 1; }
.reviews-arrow-next { grid-column: 3; grid-row: 1; }
.reviews-viewport { grid-row: 1; }
.reviews-arrow[hidden] { display: none; }
.review-card:only-child { margin-inline: auto; }
.review-link { display: grid; place-items: center; width: 100%; min-width: 0; border-radius: 16px; }
.review-card figcaption { margin-top: 0.75rem; color: var(--muted); text-align: center; }

.lightbox {
  width: fit-content;
  max-width: min(calc(100% - 2rem), 900px);
  max-height: calc(100dvh - 2rem);
  padding: 1rem;
  border: 0;
  border-radius: 16px;
  color: var(--text);
  background: var(--bg-deep);
}
.lightbox::backdrop { background: rgba(7, 24, 32, 0.88); }
.lightbox img { max-height: calc(100dvh - 8rem); width: auto; max-width: 100%; margin: auto; object-fit: contain; }
.lightbox-close { display: block; margin: 0 0 1rem auto; padding: 0.5rem 1rem; border: 0; border-radius: 999px; background: var(--accent); color: var(--bg-deep); font: inherit; cursor: pointer; }
body.review-open { overflow: hidden; }

.contact-details {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.contact-actions {
  display: grid;
  gap: 1rem;
}

.contact-actions p { margin: 0; }
.button-secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
a:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
section[id], main[id] { scroll-margin-top: 110px; }
.skip-link { position: fixed; top: -100px; left: 1rem; z-index: 30; padding: 1rem; background: var(--bg-deep); }
.skip-link:focus { top: 1rem; }

.site-footer {
  padding: 2.5rem 0;
  background: var(--bg);
  text-align: center;
}

.site-footer p {
  margin: 0.2rem 0;
}

@media (max-width: 900px) {
  .review-card { flex-basis: calc((100% - 1.25rem) / 2); }

  .menu-button {
    display: block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-deep);
    padding: 0.5rem 1.25rem 1rem;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 0.7rem 0;
  }

  .hero-grid,
  .about-grid,
  .contact-grid,
  .cards {
    grid-template-columns: 1fr;
  }

  .hero-photo img,
  .about-photo img {
    margin: 0 auto;
    width: 70%;
  }

  .about-photo {
    order: -1;
  }
}

@media (max-width: 575px) {
  .review-card { flex-basis: 100%; }
  .reviews-slider { gap: 0.25rem; }
  .reviews-arrow { width: 32px; height: 32px; }

  .hero-photo img,
  .about-photo img {
    width: 92%;
    box-shadow: -12px -12px 0 0 var(--shadow);
  }

  .button {
    width: 100%;
  }
}

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