:root {
  --bg: #0c0f14;
  --bg-elevated: #141a22;
  --text: #eef2f7;
  --text-muted: #9aa8b8;
  --border: rgba(255, 255, 255, 0.08);
  --accent: #5b8def;
  --accent-vocab: #6ee7b7;
  --accent-workout: #fb923c;
  --accent-otg: #60a5fa;
  --accent-peak: #c084fc;
  --radius: 20px;
  --shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "DM Sans", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(91, 141, 239, 0.18), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(110, 231, 183, 0.08), transparent),
    var(--bg);
}

.page {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 2rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

.top-bar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 1.25rem;
}

.lang-picker {
  position: relative;
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.7rem;
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.lang-toggle:hover,
.lang-toggle[aria-expanded="true"] {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.16);
}

.lang-icon {
  width: 1rem;
  height: 1rem;
  display: block;
  object-fit: contain;
  flex-shrink: 0;
  filter: brightness(0) invert(1);
  opacity: 0.65;
  transition: opacity 0.15s ease;
}

.lang-toggle:hover .lang-icon,
.lang-toggle[aria-expanded="true"] .lang-icon {
  opacity: 1;
}

.lang-menu {
  position: absolute;
  top: calc(100% + 0.45rem);
  right: 0;
  z-index: 20;
  min-width: 10.5rem;
  margin: 0;
  padding: 0.35rem;
  list-style: none;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

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

.lang-option {
  display: block;
  width: 100%;
  padding: 0.55rem 0.7rem;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  text-align: left;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: color 0.15s ease, background 0.15s ease;
}

.lang-option:hover,
.lang-option--active {
  color: var(--text);
  background: rgba(91, 141, 239, 0.12);
}

.hero {
  margin-bottom: 3rem;
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.brand-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  flex-shrink: 0;
  box-shadow: 0 10px 28px rgba(91, 141, 239, 0.28);
}

.brand-name {
  margin: 0;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  margin: 0 0 1rem;
  font-family: "DM Sans", system-ui, -apple-system, sans-serif;
  font-size: clamp(1.875rem, 3.8vw, 2.625rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.hero h1 em {
  font-style: normal;
  font-weight: 600;
  color: var(--accent);
}

.hero-lead {
  margin: 0;
  max-width: 40rem;
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text-muted);
}

.apps {
  display: grid;
  gap: 1.25rem;
  flex: 1;
}

@media (min-width: 640px) {
  .apps {
    grid-template-columns: repeat(2, 1fr);
    align-items: stretch;
  }
}

@media (min-width: 1040px) {
  .apps {
    grid-template-columns: repeat(4, 1fr);
  }
}

.app-card {
  container-type: inline-size;
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.app-card:hover {
  transform: translateY(-3px);
}

.app-card[data-app="vocab"]:hover {
  border-color: rgba(110, 231, 183, 0.35);
}

.app-card[data-app="workout"]:hover {
  border-color: rgba(251, 146, 60, 0.35);
}

.app-card[data-app="otg"]:hover {
  border-color: rgba(96, 165, 250, 0.35);
}

.app-card[data-app="peak"]:hover {
  border-color: rgba(192, 132, 252, 0.35);
}

.app-card--soon {
  opacity: 0.92;
}

.app-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.app-icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  flex-shrink: 0;
}

.app-card[data-app="workout"] .app-icon {
  box-shadow: 0 10px 28px rgba(251, 146, 60, 0.28);
}

.app-card[data-app="vocab"] .app-icon {
  box-shadow: 0 10px 28px rgba(110, 231, 183, 0.28);
}

.app-card[data-app="otg"] .app-icon {
  box-shadow: 0 10px 28px rgba(96, 165, 250, 0.28);
}

.app-card[data-app="peak"] .app-icon {
  box-shadow: 0 10px 28px rgba(192, 132, 252, 0.28);
}

.app-card h2 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.3;
}

.coming-soon-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.coming-soon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 0.42rem 0.75rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  color: #e9d5ff;
  background: rgba(192, 132, 252, 0.15);
  border: 1px solid rgba(192, 132, 252, 0.35);
  border-radius: 10px;
}

.app-category {
  margin: 0.2rem 0 0;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
}

.app-description {
  margin: 0 0 1.5rem;
  flex: 1;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--text-muted);
}

.store-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem;
  width: 100%;
}

.store-btn {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  padding: 0.42rem 0.35rem;
  font-size: 0.7rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #1d1d1f;
  background: #f5f5f7;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.store-icon {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

.store-btn-text--short {
  display: none;
}

@container (max-width: 260px) {
  .store-btn-text--long {
    display: none;
  }

  .store-btn-text--short {
    display: inline;
  }
}

.store-btn:hover {
  background: #ffffff;
  transform: translateY(-1px);
}

.store-btn--play:hover {
  border-color: rgba(52, 168, 83, 0.45);
}

.store-btn--apple:hover {
  border-color: rgba(29, 29, 31, 0.2);
}

.store-btn--soon {
  cursor: default;
  pointer-events: none;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border);
}

.store-btn--soon.store-btn--apple .store-icon {
  opacity: 0.9;
  filter: brightness(0) invert(1);
}

.store-btn--soon.store-btn--play .store-icon {
  opacity: 0.55;
}

.store-btn--soon.store-btn--web .store-icon {
  opacity: 0.55;
}

.store-btn--soon.store-btn--mac .store-icon {
  opacity: 0.55;
}

.store-btn--soon:hover {
  transform: none;
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border);
}

.app-card--expandable {
  cursor: pointer;
}

.app-card--expandable:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.app-card--active {
  transform: translateY(-3px);
}

.app-card--active[data-app="vocab"] {
  border-color: rgba(110, 231, 183, 0.55);
  box-shadow: 0 24px 48px rgba(110, 231, 183, 0.12);
}

.app-card--active[data-app="workout"] {
  border-color: rgba(251, 146, 60, 0.55);
  box-shadow: 0 24px 48px rgba(251, 146, 60, 0.12);
}

.app-card--active[data-app="otg"] {
  border-color: rgba(96, 165, 250, 0.55);
  box-shadow: 0 24px 48px rgba(96, 165, 250, 0.12);
}

.app-detail {
  margin-top: 1.5rem;
}

.app-detail[hidden] {
  display: none;
}

.app-detail-inner {
  padding: 1.75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.app-detail[data-app="vocab"] .app-detail-inner {
  border-color: rgba(110, 231, 183, 0.35);
}

.app-detail[data-app="workout"] .app-detail-inner {
  border-color: rgba(251, 146, 60, 0.35);
}

.app-detail[data-app="otg"] .app-detail-inner {
  border-color: rgba(96, 165, 250, 0.35);
}

.app-detail-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.app-detail-heading {
  flex: 1;
  min-width: 0;
}

.app-detail-icon {
  width: 88px;
  height: 88px;
  border-radius: 22px;
}

.app-detail[data-app="workout"] .app-detail-icon {
  box-shadow: 0 10px 28px rgba(251, 146, 60, 0.28);
}

.app-detail[data-app="vocab"] .app-detail-icon {
  box-shadow: 0 10px 28px rgba(110, 231, 183, 0.28);
}

.app-detail[data-app="otg"] .app-detail-icon {
  box-shadow: 0 10px 28px rgba(96, 165, 250, 0.28);
}

.app-detail-heading h2 {
  margin: 0;
  font-size: clamp(1.25rem, 2.5vw, 1.6rem);
  font-weight: 600;
  line-height: 1.25;
}

.app-detail-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.app-detail-close svg {
  width: 1.1rem;
  height: 1.1rem;
  fill: currentColor;
}

.app-detail-close:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.16);
}

.app-detail-summary {
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.app-detail-highlights {
  margin: 0 0 1.5rem;
  padding-left: 1.2rem;
  color: var(--text);
}

.app-detail-highlights li {
  margin-bottom: 0.45rem;
  line-height: 1.5;
}

.app-detail-highlights li:last-child {
  margin-bottom: 0;
}

.app-detail-screenshots {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.25rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.app-screenshot {
  margin: 0;
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.app-screenshot img {
  display: block;
  height: min(420px, 52vh);
  width: auto;
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
}

.store-links--detail {
  max-width: 22rem;
}

.store-links--quad {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.store-btn--web {
  background: rgba(91, 141, 239, 0.12);
  border-color: rgba(91, 141, 239, 0.35);
  color: #93c5fd;
}

.store-btn--web:hover {
  background: rgba(91, 141, 239, 0.2);
  border-color: rgba(91, 141, 239, 0.5);
  color: #bfdbfe;
}

.store-btn--web.store-btn--soon {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border);
  color: var(--text-muted);
}

.store-btn--web.store-btn--soon:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border);
  color: var(--text-muted);
  transform: none;
}

.store-btn--mac {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.16);
  color: #e5e7eb;
}

.store-btn--mac:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.22);
  color: #f9fafb;
}

.store-btn--mac.store-btn--soon {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border);
  color: var(--text-muted);
}

.store-btn--mac.store-btn--soon:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border);
  color: var(--text-muted);
  transform: none;
}

@media (max-width: 639px) {
  .app-detail-inner {
    padding: 1.25rem;
  }

  .app-screenshot img {
    height: min(360px, 48vh);
  }
}

.footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.footer-name {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-link svg {
  width: 1.1rem;
  height: 1.1rem;
  fill: currentColor;
}

.footer-link:hover {
  color: #8ab4ff;
}