/* ---------------------------------------------------------
   Design tokens
--------------------------------------------------------- */
:root {
  --color-text: #0a0a0a;
  --color-text-strong: #141414;
  --color-text-secondary: #6b6b6b;
  --color-text-muted: #7c7c78;
  --color-text-faint: #9a9a95;
  --color-border: #e6e6e6;
  --color-border-soft: #e8e8e4;
  --color-bg: #ffffff;
  --color-bg-soft: #f7f8fa;
  --color-pink: #f7e4f2;
  --color-blue: #e3f0f6;
  --color-green-bg: #eef6dd;
  --color-green-text: #035700;
  --color-ink: #141414;
  --color-link: #1a56db;
  --color-white: #ffffff;

  --radius-xl: 24px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-pill: 999px;

  --max-width: 1200px;
  --gutter: 24px;

  --shadow-soft: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
  --shadow-nav: 0 2px 12px 0 rgba(0, 0, 0, 0.07);
  --shadow-card: 0 4px 20px 0 rgba(0, 0, 0, 0.1);

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text-strong);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

[hidden] {
  display: none !important;
}

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

h1,
h2,
h3,
h4,
h5,
h6,
p,
dl,
dd {
  margin: 0;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

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

.section {
  padding-block: 120px;
  border-top: 1px solid var(--color-border);
}

@media (max-width: 900px) {
  .section {
    padding-block: 80px;
  }
}

@media (max-width: 600px) {
  .section {
    padding-block: 56px;
  }
}

/* ---------------------------------------------------------
   Nav
--------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 12px var(--gutter);
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-nav);
}

.nav__brand {
  padding: 4px 10px 4px 0;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-muted);
  white-space: nowrap;
  transition: color 0.15s ease;
}

.nav__brand:hover,
.nav__brand.is-active {
  color: var(--color-text-strong);
}

.nav__link {
  padding: 4px 10px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  white-space: nowrap;
  transition: color 0.15s ease;
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--color-text-strong);
}

@media (max-width: 420px) {
  .nav {
    gap: 0;
    padding: 6px 10px;
  }
  .nav__brand {
    padding-right: 8px;
  }
  .nav__link {
    padding: 4px 7px;
    font-size: 11px;
  }
}

/* ---------------------------------------------------------
   Language switch
--------------------------------------------------------- */
.lang-switch {
  position: relative;
}

.lang-switch__button {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: #0a0a0a;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-nav);
}

.lang-switch__label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-white);
  white-space: nowrap;
}

.lang-switch__chevron {
  flex-shrink: 0;
  color: var(--color-white);
}

.lang-switch__menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 10;
  min-width: 100%;
  margin: 0;
  padding: 4px;
  list-style: none;
  background: #0a0a0a;
  border-radius: 12px;
  box-shadow: var(--shadow-nav);
}

.lang-switch__menu[hidden] {
  display: none;
}

.lang-switch__menu li {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-white);
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.lang-switch__menu li:hover {
  background: rgba(255, 255, 255, 0.15);
}

.lang-switch__menu li[aria-selected="true"] {
  background: rgba(255, 255, 255, 0.12);
}

/* ---------------------------------------------------------
   Buttons / tags
--------------------------------------------------------- */
.pill {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: var(--color-white);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
  white-space: nowrap;
  transition: transform 0.18s ease, background-color 0.18s ease, box-shadow 0.18s ease, color 0.18s ease;
}

.pill:hover {
  transform: translateY(-2px);
  background: var(--color-pink);
  color: var(--color-text-strong);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: opacity 0.15s ease, background-color 0.15s ease;
}

.btn--dark {
  background: var(--color-text);
  color: var(--color-white);
}

.btn--dark:hover {
  opacity: 0.85;
}

.btn--outline {
  border: 1px solid var(--color-border);
  color: var(--color-text);
  background: var(--color-white);
}

.btn--outline:hover {
  background: var(--color-bg-soft);
}

.btn--white {
  background: var(--color-white);
  color: var(--color-text-strong);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-link);
}

.link-arrow__arrow {
  transition: transform 0.15s ease;
}

.link-arrow:hover .link-arrow__arrow {
  transform: translateX(2px);
}

/* ---------------------------------------------------------
   Footer
--------------------------------------------------------- */
.site-footer {
  padding: 24px var(--gutter);
  border-top: 1px solid var(--color-border);
}

.site-footer__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  max-width: var(--max-width);
  margin-inline: auto;
}

.site-footer__copy {
  font-size: 12px;
  color: var(--color-text-secondary);
}

.site-footer__links {
  display: flex;
  gap: 24px;
}

.site-footer__links a {
  font-size: 12px;
  color: var(--color-text-secondary);
  transition: color 0.15s ease;
}

.site-footer__links a:hover {
  color: var(--color-text-strong);
}

/* ---------------------------------------------------------
   Section heading
--------------------------------------------------------- */
.section-heading {
  font-size: clamp(28px, 3.2vw, 38.8px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--color-text);
}

.section-subhead {
  padding-top: 8px;
  font-size: 15px;
  color: var(--color-text-secondary);
}