:root {
  color-scheme: light;
  --bg: #f7f3ec;
  --surface: #fffaf2;
  --surface-strong: #ffffff;
  --ink: #191816;
  --muted: #686157;
  --line: #ded4c4;
  --header-bg: rgba(247, 243, 236, 0.9);
  --overlay-bg: #132a35;
  --soft-band: #d8e6f1;
  --tag-bg: #d8e6f1;
  --contact-text: rgba(255, 255, 255, 0.74);
  --primary-50: #d8e6f1;
  --primary-100: #b9ced9;
  --primary-200: #9bb3c1;
  --primary-300: #7a9aaa;
  --primary-400: #64889b;
  --primary-500: #4a7489;
  --primary-600: #3d6578;
  --primary-700: #2f5161;
  --primary-800: #213e4c;
  --primary-900: #132a35;
  --red: #b6422f;
  --gold: #c18a2d;
  --shadow: 0 18px 50px rgba(25, 24, 22, 0.1);
  --radius: 8px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #132a35;
  --surface: #213e4c;
  --surface-strong: #2f5161;
  --ink: #f7f3ec;
  --muted: #b9ced9;
  --line: rgba(216, 230, 241, 0.22);
  --header-bg: rgba(19, 42, 53, 0.9);
  --overlay-bg: #0d2029;
  --soft-band: #213e4c;
  --tag-bg: rgba(216, 230, 241, 0.12);
  --contact-text: rgba(216, 230, 241, 0.78);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.22);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

body.nav-open {
  overflow: hidden;
}

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

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

button {
  font: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: 12px 18px;
  background: var(--header-bg);
  border-bottom: 1px solid rgba(222, 212, 196, 0.8);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-size: 0.95rem;
  font-weight: 800;
}

.brand span:last-child {
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  color: #fff;
  background: var(--primary-900);
  border-radius: 50%;
  font-size: 0.78rem;
  letter-spacing: 0;
}

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.theme-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 6px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 850;
}

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 44px;
  padding: 5px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 850;
}

.language-switch__option {
  min-width: 38px;
  padding: 7px 10px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.76rem;
  text-align: center;
  transition:
    background 180ms ease,
    color 180ms ease;
}

.language-switch__option.is-active {
  color: #fff;
  background: var(--primary-700);
}

.theme-switch__track {
  position: relative;
  width: 42px;
  height: 26px;
  background: var(--primary-100);
  border: 1px solid var(--primary-300);
  border-radius: 999px;
  transition:
    background 180ms ease,
    border-color 180ms ease;
}

.theme-switch__thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: var(--surface-strong);
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(19, 42, 53, 0.24);
  transition: transform 180ms ease;
}

.theme-switch__text {
  display: none;
  min-width: 34px;
  font-size: 0.78rem;
}

:root[data-theme="dark"] .theme-switch__track {
  background: var(--primary-700);
  border-color: var(--primary-400);
}

:root[data-theme="dark"] .theme-switch__thumb {
  transform: translateX(16px);
}

.menu-button {
  position: relative;
  z-index: 30;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 50%;
}

.menu-button__bars,
.menu-button__bars::before,
.menu-button__bars::after {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  transition:
    transform 180ms ease,
    opacity 180ms ease;
}

.menu-button__bars::before,
.menu-button__bars::after {
  content: "";
  position: absolute;
}

.menu-button__bars::before {
  transform: translateY(-6px);
}

.menu-button__bars::after {
  transform: translateY(6px);
}

.menu-button[aria-expanded="true"] .menu-button__bars {
  transform: rotate(45deg);
}

.menu-button[aria-expanded="true"] .menu-button__bars::before {
  opacity: 0;
}

.menu-button[aria-expanded="true"] .menu-button__bars::after {
  transform: rotate(90deg);
}

.site-nav {
  position: fixed;
  inset: 0;
  display: grid;
  align-content: center;
  gap: 8px;
  padding: 86px 22px 32px;
  background: var(--overlay-bg);
  color: #fff;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

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

.site-nav a {
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  font-size: clamp(1.55rem, 11vw, 3.1rem);
  font-weight: 850;
}

.hero {
  display: grid;
  gap: 26px;
  padding: 40px 18px 28px;
}

.hero__content {
  display: grid;
  gap: 18px;
}

.eyebrow {
  margin: 0;
  color: var(--red);
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 980px;
  margin-bottom: 0;
  font-size: clamp(2.45rem, 15vw, 5.4rem);
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(2rem, 10vw, 4rem);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.2rem;
  line-height: 1.12;
  letter-spacing: 0;
}

.hero__lead {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.04rem;
}

.hero__actions,
.contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 16px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-weight: 800;
}

.button--primary {
  color: #fff;
  background: var(--primary-900);
  border-color: var(--primary-900);
}

:root[data-theme="dark"] .button--primary {
  color: var(--primary-900);
  background: var(--primary-50);
  border-color: var(--primary-50);
}

.button--ghost {
  color: var(--ink);
  background: transparent;
}

.hero-visual {
  width: min(100%, 560px);
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

:root[data-theme="dark"] .hero-visual {
  background: var(--surface);
}

.section {
  padding: 56px 18px;
}

.intro {
  padding-top: 20px;
  padding-bottom: 34px;
}

.intro p {
  max-width: 860px;
  margin: 0;
  font-size: clamp(1.28rem, 7vw, 2.6rem);
  line-height: 1.12;
  font-weight: 760;
}

.section-heading {
  display: grid;
  gap: 10px;
  margin-bottom: 24px;
}

.area-list,
.case-list {
  display: grid;
  gap: 14px;
}

.area-card,
.case-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.area-card {
  padding: 20px;
}

.area-card__index {
  display: inline-flex;
  margin-bottom: 24px;
  color: var(--primary-700);
  font-size: 0.82rem;
  font-weight: 900;
}

.area-card p,
.case-card p,
.method li,
.contact p {
  color: var(--muted);
}

.filter-bar {
  display: flex;
  gap: 8px;
  margin: 0 -18px 18px;
  padding: 0 18px 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.filter-bar::-webkit-scrollbar {
  display: none;
}

.filter-button {
  flex: 0 0 auto;
  min-height: 40px;
  padding: 9px 14px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 800;
}

.filter-button.is-active {
  color: #fff;
  background: var(--primary-700);
  border-color: var(--primary-700);
}

.case-card {
  display: grid;
}

.case-card.is-hidden {
  display: none;
}

.case-card__media {
  min-height: 168px;
  background-color: #ddd1bd;
  background-position: center;
  background-size: cover;
}

.case-card__media--product {
  background-image:
    linear-gradient(135deg, rgba(19, 42, 53, 0.94), rgba(74, 116, 137, 0.2)),
    url("assets/product-pattern.svg");
}

.case-card__media--ux {
  background-image:
    linear-gradient(135deg, rgba(47, 81, 97, 0.9), rgba(216, 230, 241, 0.08)),
    url("assets/ux-pattern.svg");
}

.case-card__media--graphic {
  background-image:
    linear-gradient(135deg, rgba(182, 66, 47, 0.88), rgba(193, 138, 45, 0.2)),
    url("assets/graphic-pattern.svg");
}

.case-card__body {
  padding: 18px;
}

.case-card__type {
  margin-bottom: 8px;
  color: var(--primary-700);
  font-size: 0.78rem;
  font-weight: 850;
  text-transform: uppercase;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 18px 0 0;
  list-style: none;
}

.tag-list li {
  padding: 6px 9px;
  background: var(--tag-bg);
  border-radius: 999px;
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 800;
}

.method {
  background: var(--soft-band);
}

.timeline {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
  counter-reset: step;
}

.timeline li {
  position: relative;
  padding: 18px 18px 18px 54px;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  border: 1px solid rgba(47, 81, 97, 0.22);
  border-radius: var(--radius);
}

.timeline li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 16px;
  top: 18px;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  color: #fff;
  background: var(--primary-700);
  border-radius: 50%;
  font-size: 0.78rem;
  font-weight: 850;
}

.timeline span {
  display: block;
  margin-bottom: 4px;
  color: var(--ink);
  font-weight: 850;
}

.contact {
  display: grid;
  gap: 22px;
  margin: 18px;
  padding: 28px 20px;
  color: #fff;
  background: var(--primary-900);
  border-radius: var(--radius);
}

.contact .eyebrow {
  color: #f3b24a;
}

.contact h2 {
  margin: 8px 0 14px;
  font-size: clamp(2rem, 10vw, 3.5rem);
}

.contact p {
  margin-bottom: 0;
  color: var(--contact-text);
}

.contact .button {
  border-color: rgba(255, 255, 255, 0.5);
}

.contact .button--primary {
  color: var(--primary-900);
  background: #fff;
}

.contact .button--ghost {
  color: #fff;
}

.site-footer {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 28px 18px;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (min-width: 760px) {
  .site-header {
    padding: 14px 32px;
  }

  .theme-switch {
    padding-right: 10px;
  }

  .theme-switch__text {
    display: inline;
  }

  .menu-button {
    display: none;
  }

  body.nav-open {
    overflow: auto;
  }

  .site-nav {
    position: static;
    display: flex;
    align-items: center;
    gap: 22px;
    padding: 0;
    color: var(--ink);
    background: transparent;
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .site-nav a {
    padding: 0;
    border-bottom: 0;
    font-size: 0.92rem;
    font-weight: 760;
  }

  .hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.72fr);
    align-items: end;
    min-height: calc(100svh - 64px);
    padding: 68px 32px 44px;
  }

  .section {
    padding: 78px 32px;
  }

  .intro {
    padding-top: 42px;
  }

  .area-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .filter-bar {
    margin-right: 0;
    margin-left: 0;
    padding-right: 0;
    padding-left: 0;
  }

  .case-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .case-card {
    grid-template-rows: 220px 1fr;
  }

  .timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .contact {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    margin: 32px;
    padding: 42px;
  }

  .contact__actions {
    justify-content: flex-end;
  }

  .site-footer {
    flex-direction: row;
    justify-content: space-between;
    padding: 34px 32px;
  }
}

@media (min-width: 1120px) {
  .site-header,
  .hero,
  .section,
  .site-footer {
    padding-right: max(48px, calc((100vw - 1180px) / 2));
    padding-left: max(48px, calc((100vw - 1180px) / 2));
  }

  .contact {
    max-width: 1180px;
    margin-right: auto;
    margin-left: auto;
  }
}