:root {
  --color-bg: #fafafa;
  --color-text: #444;
  --color-text-strong: #111;
  --color-text-medium: #333;
  --color-text-muted: #666;
  --color-text-em: #1a1a1a;
  --color-border: #e8e8e8;
  --color-highlight: #dceee3;
  --color-lang-active: #e4f0e8;
  --color-lang-active-border: #b8d4c4;
  --radius-sm: 6px;
  --radius-md: 8px;
}

html:not(.i18n-ready) body {
  visibility: hidden;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

::selection {
  background: var(--color-highlight);
  color: var(--color-text-strong);
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding:
    max(3.75rem, calc(1.25rem + env(safe-area-inset-top, 0px)))
    max(1.25rem, env(safe-area-inset-right, 0px))
    max(1.25rem, env(safe-area-inset-bottom, 0px))
    max(1.25rem, env(safe-area-inset-left, 0px));
  font-family: "Plus Jakarta Sans", system-ui, sans-serif;
  font-size: clamp(0.9375rem, 2.5vw, 1rem);
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

main {
  width: 100%;
  max-width: min(34rem, 100%);
  text-align: center;
}

.lang {
  position: fixed;
  top: max(1rem, env(safe-area-inset-top, 0px));
  right: max(1rem, env(safe-area-inset-right, 0px));
  z-index: 10;
}

.lang-track {
  position: relative;
  display: flex;
  padding: 4px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

.lang-slider {
  position: absolute;
  top: 4px;
  left: 4px;
  width: calc((100% - 8px) / 3);
  height: calc(100% - 8px);
  background: var(--color-lang-active);
  border: 1px solid var(--color-lang-active-border);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 3px rgba(90, 130, 100, 0.15);
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
  pointer-events: none;
}

.lang button {
  position: relative;
  z-index: 1;
  flex: 1;
  min-width: 2.25rem;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: clamp(0.625rem, 2vw, 0.6875rem);
  font-weight: 500;
  letter-spacing: 0.05em;
  padding: 0.38rem 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color 0.4s ease, font-weight 0.4s ease;
}

.lang button:hover {
  color: var(--color-text-strong);
}

.lang button.active {
  color: var(--color-text-strong);
  font-weight: 600;
}

h1 {
  font-size: clamp(1.5rem, 5vw + 0.5rem, 2.5rem);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: clamp(1.25rem, 4vw, 2rem);
  color: var(--color-text-strong);
  text-wrap: balance;
}

.hl {
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  background: linear-gradient(to top, var(--color-highlight) 45%, transparent 45%);
  padding: 0 0.1em;
}

.em {
  font-weight: 500;
  color: var(--color-text-em);
}

.soft {
  font-style: italic;
  color: var(--color-text-muted);
}

.text {
  text-align: left;
  border-left: 2px solid var(--color-border);
  padding-left: clamp(0.875rem, 3vw, 1.25rem);
}

.text p {
  margin-bottom: clamp(1rem, 3vw, 1.25rem);
}

.text p:last-child {
  margin-bottom: 0;
}

.lead {
  font-size: clamp(1rem, 2.5vw, 1.05rem);
  color: var(--color-text-medium);
}

@media (max-width: 360px) {
  body {
    padding-top: max(3.25rem, calc(0.875rem + env(safe-area-inset-top, 0px)));
    padding-left: max(0.875rem, env(safe-area-inset-left, 0px));
    padding-right: max(0.875rem, env(safe-area-inset-right, 0px));
  }

  .lang button {
    min-width: 2rem;
    padding: 0.35rem 0.4rem;
  }
}

@media (max-width: 480px) {
  body {
    align-items: flex-start;
    padding-top: max(3.5rem, calc(1rem + env(safe-area-inset-top, 0px)));
  }
}

@media (max-height: 520px) and (orientation: landscape) {
  body {
    align-items: flex-start;
    padding-top: max(3.25rem, calc(0.875rem + env(safe-area-inset-top, 0px)));
    padding-bottom: 1rem;
  }

  h1 {
    margin-bottom: 1rem;
  }

  .text p {
    margin-bottom: 0.875rem;
  }
}

@media (min-width: 768px) {
  main {
    max-width: 36rem;
  }
}

@media (min-width: 1200px) {
  body {
    font-size: 1.0625rem;
  }

  main {
    max-width: 38rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lang-slider,
  .lang button {
    transition: none;
  }
}