/* global.css
   Brand direction: editorial, French-inspired
   Palette: Ivoire + Ink + Powder Blue + Mauve + Aquamarine
*/

:root {
  /* Brand */
  --color-bg: #fff9f0;
  --color-surface: #ffffff;
  --color-text: #171717;
  --color-text-muted: #6f6a63;

  --color-primary: #aab2ff;
  --color-primary-hover: #8f99f7;
  --color-primary-soft: #eef0ff;
  --color-primary-ink: #4b52c9;

  --color-accent: #eca0ff;
  --color-accent-hover: #e37bff;
  --color-accent-soft: #fbeaff;
  --color-accent-ink: #a238c4;

  --color-coral: #84ffc9;
  --color-coral-soft: #e3fff1;
  --color-coral-ink: #0e9c68;

  --color-border: #e6e0d3;

  /* Semantic */
  --color-success: #2f8f62;
  --color-focus: #171717;

  /* Typography */
  --font-sans:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;

  --font-display:
    "Fraunces", ui-serif, Georgia, "Times New Roman", serif;

  /* Layout */
  --container: 1180px;
  --header-height: 76px;

  /* Radius */
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgb(23 23 23 / 0.05);
  --shadow-md: 0 14px 40px rgb(23 23 23 / 0.08);
  --shadow-lift: 0 18px 50px rgb(23 23 23 / 0.12);

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --transition: 180ms var(--ease);
}

/* ------------------------------
   Reset
------------------------------ */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

button,
input,
textarea,
select {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-decoration-thickness: 0.09em;
  text-underline-offset: 0.18em;
}

::selection {
  background: var(--color-accent-soft);
  color: var(--color-text);
}

/* ------------------------------
   Typography
------------------------------ */

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
}

h1 {
  max-width: 17ch;
  margin-bottom: 22px;
  font-size: clamp(2.5rem, 6vw, 5.25rem);
}

h2 {
  max-width: 16ch;
  margin-bottom: 22px;
  font-size: clamp(2.1rem, 4.5vw, 3.75rem);
}

h3 {
  margin-bottom: 14px;
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
}

p {
  margin-bottom: 1.15em;
}

.lead {
  max-width: 640px;
  font-size: clamp(1.1rem, 1.8vw, 1.35rem);
  line-height: 1.55;
}

.text-muted {
  color: var(--color-text-muted);
}

.highlight {
  display: inline;
  padding: 0 0.12em;
  background:
    linear-gradient(
      transparent 56%,
      var(--color-accent-soft) 56%,
      var(--color-accent-soft) 93%,
      transparent 93%
    );
}

/* ------------------------------
   Tricolor rule (top of page)
------------------------------ */

.tricolor-rule {
  height: 4px;
  background: linear-gradient(
    90deg,
    #1d2f6f 0%,
    #1d2f6f 33.33%,
    #fdfaf3 33.33%,
    #fdfaf3 66.66%,
    #8a1332 66.66%,
    #8a1332 100%
  );
}

/* ------------------------------
   Layout
------------------------------ */

.container {
  width: min(calc(100% - 40px), var(--container));
  margin-inline: auto;
}

.section {
  padding: clamp(72px, 9vw, 130px) 0;
}

.section--tight {
  padding: clamp(48px, 6vw, 84px) 0;
}

.section--lilac {
  background: var(--color-primary-soft);
}

.section--dark {
  background: var(--color-text);
  color: var(--color-bg);
}

.grid {
  display: grid;
  gap: 24px;
}

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

.stack > * + * {
  margin-top: 20px;
}

.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;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: var(--header-height);
  border-bottom: 1px solid rgb(221 216 207 / 0.8);
  background: rgb(255 249 240 / 0.88);
  backdrop-filter: blur(18px);
}

.site-nav {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-size: 1.05rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-links a {
  font-weight: 700;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--color-primary-ink);
}

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

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 21px;
  border: 2px solid var(--color-text);
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  color: var(--color-text);
  box-shadow: 3px 3px 0 var(--color-text);
  font-weight: 800;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    background var(--transition);
}

.button:hover {
  background: var(--color-primary-hover);
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--color-text);
}

.button:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--color-text);
}

.button--accent {
  background: var(--color-accent);
  color: var(--color-text);
}

.button--accent:hover {
  background: var(--color-accent-hover);
}

.button--ghost {
  background: transparent;
  color: var(--color-text);
  box-shadow: none;
}

.button--ghost:hover {
  background: var(--color-primary-soft);
  box-shadow: none;
}

.email-tooltip-wrap {
  position: relative;
  display: inline-flex;
}

.email-tooltip {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 50%;
  z-index: 5;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  background: var(--color-text);
  color: var(--color-bg);
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  opacity: 0;
  transform: translate(-50%, 4px);
  transition:
    opacity var(--transition),
    transform var(--transition);
  pointer-events: none;
}

.email-tooltip::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  border: 5px solid transparent;
  border-top-color: var(--color-text);
  transform: translateX(-50%);
}

.email-tooltip-wrap:hover .email-tooltip,
.email-tooltip-wrap:focus-within .email-tooltip {
  opacity: 1;
  transform: translate(-50%, 0);
}

.button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 4px;
}

/* ------------------------------
   Hero
------------------------------ */

.hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  padding: clamp(76px, 10vw, 150px) 0;
}

.hero::after {
  content: "";
  position: absolute;
  top: 7%;
  right: -7%;
  width: clamp(200px, 30vw, 460px);
  aspect-ratio: 1;
  border-radius: 42% 58% 62% 38% / 44% 35% 65% 56%;
  background: var(--color-primary-soft);
  transform: rotate(11deg);
  z-index: -1;
}

.hero-sticker {
  position: absolute;
  top: 3%;
  right: 1%;
  width: clamp(200px, 24vw, 320px);
  transform: rotate(8deg);
  filter: drop-shadow(0 14px 24px rgb(23 23 23 / 0.18));
  pointer-events: none;
  z-index: 1;
}

.hero__content {
  position: relative;
  max-width: 900px;
}

.hero__actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.hero__tagline {
  font-weight: 600;
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--color-text-muted);
}

h1 em,
h2 em {
  font-style: italic;
  color: var(--color-primary-ink);
  font-weight: 600;
}

/* ------------------------------
   Credentials signal
------------------------------ */

.credentials {
  position: relative;
  z-index: 2;
  padding: 0 0 clamp(10px, 2vw, 28px);
}

.credentials__panel {
  position: relative;
  overflow: hidden;
  padding: 11px;
  border: 1px solid rgb(170 178 255 / 0.5);
  border-radius: 24px;
  background:
    linear-gradient(120deg, rgb(170 178 255 / 0.18), transparent 24%),
    linear-gradient(300deg, rgb(236 160 255 / 0.16), transparent 28%),
    #16151c;
  color: #fff9f0;
  box-shadow:
    0 24px 70px rgb(23 23 23 / 0.16),
    inset 0 1px 0 rgb(255 255 255 / 0.09);
}

.credentials__panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgb(255 255 255 / 0.025) 1px, transparent 1px);
  background-size: 100% 7px;
  pointer-events: none;
}

.credentials__panel::after {
  content: "";
  position: absolute;
  top: -70%;
  left: -16%;
  width: 32%;
  height: 240%;
  background: linear-gradient(90deg, transparent, rgb(255 255 255 / 0.08), transparent);
  transform: rotate(18deg);
  pointer-events: none;
}

.credentials__panel.is-visible::after {
  animation: credentials-scan 7s var(--ease) 700ms infinite;
}

.credentials__signal {
  display: flex;
  gap: 5px;
  padding: 7px 9px 10px;
}

.credentials__signal span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 12px var(--color-primary);
  animation: signal-pulse 2.4s ease-in-out infinite;
}

.credentials__signal span:nth-child(2) {
  background: var(--color-accent);
  box-shadow: 0 0 12px var(--color-accent);
  animation-delay: 180ms;
}

.credentials__signal span:nth-child(3) {
  background: var(--color-coral);
  box-shadow: 0 0 12px var(--color-coral);
  animation-delay: 360ms;
}

.credentials__grid {
  position: relative;
  display: grid;
  grid-template-columns: 0.82fr 1.15fr 1.55fr;
  align-items: stretch;
}

.credential {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: center;
  min-height: 112px;
  padding: 22px clamp(20px, 3vw, 34px);
  border-right: 1px solid rgb(255 255 255 / 0.12);
}

:root.js .credentials__panel .credential {
  opacity: 0;
  transform: translateY(14px);
}

:root.js .credentials__panel.is-visible .credential {
  animation: credential-in 720ms var(--ease) 180ms forwards;
}

:root.js .credentials__panel.is-visible .credential:nth-child(2) {
  animation-delay: 300ms;
}

:root.js .credentials__panel.is-visible .credential:nth-child(3) {
  animation-delay: 420ms;
}

.credential:last-child {
  border-right: 0;
}

.credential__index {
  align-self: start;
  padding-top: 0.32em;
  color: var(--color-primary);
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.credential:nth-child(2) .credential__index {
  color: var(--color-accent);
}

.credential:nth-child(3) .credential__index {
  color: var(--color-coral);
}

.credential__text {
  font-family: var(--font-display);
  font-size: clamp(1.08rem, 1.7vw, 1.42rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

@keyframes credential-in {
  from {
    opacity: 0;
    transform: translateY(14px);
    filter: blur(5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

@keyframes credentials-scan {
  0%,
  8% {
    left: -24%;
    opacity: 0;
  }
  12% {
    opacity: 1;
  }
  28% {
    left: 112%;
    opacity: 0;
  }
  100% {
    left: 112%;
    opacity: 0;
  }
}

@keyframes signal-pulse {
  0%,
  100% {
    opacity: 0.45;
    transform: scale(0.82);
  }
  45% {
    opacity: 1;
    transform: scale(1.18);
  }
}

@media (max-width: 820px) {
  .credentials__grid {
    grid-template-columns: 1fr;
  }

  .credential {
    min-height: 0;
    padding-block: 19px;
    border-right: 0;
    border-bottom: 1px solid rgb(255 255 255 / 0.12);
  }

  .credential:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 860px) {
  .hero::after {
    top: 3%;
    right: -18%;
    opacity: 0.7;
  }
}

@media (max-width: 700px) {
  .hero-sticker {
    position: static;
    display: block;
    width: clamp(84px, 26vw, 140px);
    margin: 0 4px 16px auto;
    transform: rotate(6deg);
  }
}

/* ------------------------------
   Lesson cards
------------------------------ */

.lesson-card {
  position: relative;
  min-height: 100%;
  padding: clamp(28px, 4vw, 42px);
  border: 2px solid var(--color-text);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: 5px 5px 0 var(--color-text);
  overflow: hidden;
  transition:
    transform var(--transition),
    border-color var(--transition),
    box-shadow var(--transition);
}

.lesson-card:hover {
  transform: translateY(-5px);
  border-color: var(--card-accent);
  box-shadow: 8px 10px 0 var(--card-accent);
}

.lesson-card h3 {
  transition: color var(--transition);
}

.lesson-card:hover h3 {
  color: var(--card-accent-ink);
}

.lesson-card__icon {
  display: inline-flex;
  align-items: flex-end;
  height: 64px;
  margin-bottom: 16px;
  transition: transform var(--transition);
}

.lesson-card__icon img {
  display: block;
  height: 64px;
  width: auto;
}

.lesson-card--learn {
  --card-accent: var(--color-coral);
  --card-accent-ink: var(--color-coral-ink);
  --card-accent-soft: var(--color-coral-soft);
}

.lesson-card--study {
  --card-accent: var(--color-primary);
  --card-accent-ink: var(--color-primary-ink);
  --card-accent-soft: var(--color-primary-soft);
}

.lesson-card--work {
  --card-accent: var(--color-accent);
  --card-accent-ink: var(--color-accent-ink);
  --card-accent-soft: var(--color-accent-soft);
}

.lesson-card--learn .lesson-card__icon {
  transform: rotate(-4deg);
}

.lesson-card--study .lesson-card__icon {
  transform: rotate(3deg);
}

.lesson-card--work .lesson-card__icon {
  transform: rotate(-3deg);
}

.lesson-card--learn:hover .lesson-card__icon {
  transform: scale(1.1) rotate(3deg);
}

.lesson-card--study:hover .lesson-card__icon {
  transform: scale(1.1) rotate(-4deg);
}

.lesson-card--work:hover .lesson-card__icon {
  transform: scale(1.1) rotate(4deg);
}

.lesson-card__tagline {
  font-weight: 700;
}

.lesson-card__topics {
  margin-bottom: 0;
  color: var(--card-accent-ink);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.01em;
}

.lesson-card__for {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px dashed var(--color-border);
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.lesson-card__for strong {
  color: var(--color-text);
}

/* ------------------------------
   Approach / methodology section
------------------------------ */

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(28px, 4vw, 48px);
  margin-top: 12px;
}

.benefit h3 {
  margin-bottom: 8px;
}

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

@media (max-width: 760px) {
  .benefits-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

/* ------------------------------
   About / credibility
------------------------------ */

.about-card {
  padding: clamp(30px, 5vw, 60px);
  border-radius: var(--radius-lg);
  background: var(--color-primary);
  color: var(--color-text);
}

.about-card strong {
  color: var(--color-accent-ink);
}

.about-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}

.about-photo {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border: 2px solid var(--color-text);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lift);
}

@media (max-width: 860px) {
  .about-grid {
    grid-template-columns: 1fr;
  }

  .about-photo-wrap {
    max-width: 320px;
    margin-inline: auto;
  }
}

/* ------------------------------
   Pricing
------------------------------ */

.price {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 12px 0 26px;
}

.price__amount {
  font-size: clamp(3rem, 6vw, 5.5rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.06em;
}

.price__meta {
  color: var(--color-text-muted);
  font-weight: 700;
}

.pricing-grid {
  display: grid;
  grid-template-columns: minmax(0, 560px) 1fr;
  gap: clamp(32px, 6vw, 72px);
  align-items: center;
}

@media (max-width: 860px) {
  .pricing-grid {
    grid-template-columns: 1fr;
  }
}

.pricing-card {
  max-width: 560px;
  padding: clamp(30px, 5vw, 52px);
  border: 2px solid var(--color-text);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: 6px 6px 0 var(--color-text);
}

.pricing-next h3 {
  margin-bottom: 24px;
}

.next-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.next-steps li {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding-bottom: 28px;
}

.next-steps li:last-child {
  padding-bottom: 0;
}

.next-steps li:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 36px;
  bottom: 0;
  width: 1.5px;
  background: var(--color-border);
}

.next-steps__num {
  display: inline-flex;
  flex: none;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 2px solid var(--color-text);
  border-radius: 50%;
  background: var(--color-surface);
  font-weight: 800;
  font-size: 0.92rem;
  position: relative;
  z-index: 1;
}

.next-steps__text {
  padding-top: 6px;
  font-weight: 600;
}

.pricing-includes {
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  color: var(--color-text-muted);
}

.pricing-includes li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
}

.pricing-includes li::before {
  content: "•";
  position: absolute;
  left: 2px;
  color: var(--color-text);
  font-size: 1.1em;
  line-height: 1;
}

.pricing-divider {
  height: 1px;
  margin: 26px 0;
  background: var(--color-border);
}

.pricing-free {
  margin-bottom: 26px;
  font-size: 1.05rem;
}

/* ------------------------------
   Final CTA
------------------------------ */

.cta {
  position: relative;
  max-width: 640px;
}

.cta__meta {
  margin-top: 22px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-weight: 600;
}

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

.site-footer {
  padding: 36px 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.94rem;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.footer-grid a {
  font-weight: 700;
  text-decoration: none;
}

.footer-grid a:hover {
  color: var(--color-primary-ink);
}

.footer-credit {
  margin-top: 12px;
  text-align: center;
  font-size: 0.82rem;
  opacity: 0.7;
}

.footer-credit a {
  color: inherit;
  text-decoration: underline;
}

.footer-credit a:hover {
  color: var(--color-primary-ink);
}

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

@media (max-width: 860px) {
  .grid--3 {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none;
  }
}

@media (max-width: 600px) {
  :root {
    --header-height: 66px;
  }

  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .section {
    padding: 68px 0;
  }

  .hero {
    padding: 72px 0 82px;
  }

  .credentials__panel {
    border-radius: 19px;
  }

  .credentials__signal {
    padding-bottom: 6px;
  }

  .credential {
    gap: 11px;
    padding: 16px 14px;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .button {
    width: 100%;
  }

  .lesson-card {
    box-shadow: 4px 4px 0 var(--color-text);
  }

  .lesson-card:hover {
    transform: none;
    box-shadow: 4px 4px 0 var(--color-text);
  }
}

/* ------------------------------
   Skip link
------------------------------ */

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 200;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  background: var(--color-text);
  color: var(--color-bg);
  font-weight: 700;
  text-decoration: none;
  transition: top var(--transition);
}

.skip-link:focus {
  top: 16px;
}

/* ------------------------------
   Decorative: grain overlay
------------------------------ */

.grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.045;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 220px 220px;
}

/* ------------------------------
   Reveal on scroll
------------------------------ */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 700ms var(--ease),
    transform 700ms var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

:root:not(.js) .reveal {
  opacity: 1;
  transform: none;
}

.reveal--1 {
  transition-delay: 60ms;
}

.reveal--2 {
  transition-delay: 140ms;
}

.reveal--3 {
  transition-delay: 220ms;
}

/* ------------------------------
   Header: mobile nav + toggle
------------------------------ */

.nav-cta {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* ------------------------------
   Language switch
------------------------------ */

.lang-switch {
  position: relative;
  display: inline-flex;
  flex: none;
  padding: 3px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
}

.lang-switch::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: calc(50% - 3px);
  height: calc(100% - 6px);
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  transition: transform 260ms var(--ease);
}

.lang-switch.is-en::before {
  transform: translateX(100%);
}

.lang-switch__btn {
  position: relative;
  z-index: 1;
  min-width: 38px;
  padding: 6px 10px;
  border: none;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-text-muted);
  font-weight: 800;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: color var(--transition);
}

.lang-switch__btn.is-active {
  color: var(--color-text);
}

.mobile-nav .lang-switch {
  align-self: flex-start;
}

.nav-links a.is-active {
  color: var(--color-primary-ink);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border: 2px solid var(--color-text);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin-inline: 8px;
  background: var(--color-text);
  transition:
    transform var(--transition),
    opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  border-bottom: 1px solid rgb(221 216 207 / 0.8);
  background: var(--color-bg);
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav .container {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding-block: 24px 28px;
}

.mobile-nav nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-nav a {
  padding: 10px 0;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav > .container > .button {
  align-self: flex-start;
}

@media (max-width: 860px) {
  .nav-cta__button {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }
}

/* ------------------------------
   Language switch: page transition
------------------------------ */

::view-transition-old(root) {
  animation: lang-out 420ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

::view-transition-new(root) {
  animation: lang-in 420ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes lang-out {
  from {
    opacity: 1;
    filter: blur(0);
    transform: scale(1);
  }
  to {
    opacity: 0;
    filter: blur(10px);
    transform: scale(0.98);
  }
}

@keyframes lang-in {
  from {
    opacity: 0;
    filter: blur(10px);
    transform: scale(1.02);
  }
  to {
    opacity: 1;
    filter: blur(0);
    transform: scale(1);
  }
}

/* Fallback for browsers without the View Transitions API */

.lang-fade-out {
  opacity: 0;
  filter: blur(6px);
  transition:
    opacity 200ms var(--ease),
    filter 200ms var(--ease);
}

/* ------------------------------
   Accessibility
------------------------------ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation: none !important;
  }

  .credentials__panel::after {
    display: none;
  }

  .credentials__signal span,
  :root.js .credentials__panel .credential {
    opacity: 1;
    transform: none;
    filter: none;
    animation: none;
  }
}