:root {
  /* Colors */
  --color-text: #0f0f0f;
  --color-background: #fafafa;
  --color-highlight: #00a0dc;
  --color-highlight-dark: #0077b2;
  --color-sentry: #352d56;
  --color-text-muted: #666666;
  --color-border: rgba(0, 0, 0, 0.1);
  --color-interactive: var(--color-highlight);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 0.75rem;
  --spacing-lg: 1rem;
  --spacing-xl: 1.5rem;

  /* Typography */
  --font-size-base: 1rem;
  --font-size-lg: 1.5rem;
  --font-size-xl: 4rem;
  --font-size-xxl: 6rem;
  --line-height-base: 0.7;
  --letter-spacing-wide: 0.05em;

  /* Layout */
  --container-max-width: 800px;
  --menu-height: 3rem;
  --title-height: 6rem;
  --content-width: 90%;
  --content-max-width: 600px;

  /* Icons */
  --icon-size-sm: 1.5rem;
  --icon-size-md: 1.75rem;
  --icon-size-lg: 2.5rem;

  /* Transitions */
  --transition-duration: 0.25s;
  --transition-timing: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-all: all var(--transition-duration) var(--transition-timing);

  /* Animations */
  --scale-hover: 1.1;
  --scale-active: 0.95;
  --translate-hover: -2px;

  /* Border radius */
  --border-radius: 4px;
  --border-radius-lg: 8px;

  /* Focus outline */
  --focus-outline-width: 2px;
  --focus-outline-offset: 2px;

  /* Z-index layers */
  --z-menu: 1000;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);

  /* Interactive elements */
  --interactive-opacity: 0.8;
  --interactive-opacity-hover: 1;
  --interactive-scale: 1.1;
  --interactive-scale-active: 0.95;
  --interactive-translate: -2px;
}

[data-theme="dark"] {
  --color-text: #fafafa;
  --color-background: #0f0f0f;
  --color-text-muted: #a0a0a0;
  --color-border: rgba(255, 255, 255, 0.1);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

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

body {
  color: var(--color-text);
  background-color: var(--color-background);
  font-family: "BioRhyme", serif;
  line-height: 1.5;
  transition: background-color var(--transition-duration)
      var(--transition-timing),
    color var(--transition-duration) var(--transition-timing);
}

img {
  filter: invert(0%) sepia(13%) saturate(4428%) hue-rotate(222deg)
    brightness(87%) contrast(88%);
  transition: filter var(--transition-duration) var(--transition-timing);
}

[data-theme="dark"] img {
  filter: invert(100%);
}

/* Base interactive styles */
button,
a {
  transition: var(--transition-all);
  opacity: var(--interactive-opacity);
}

button:hover,
a:hover {
  opacity: var(--interactive-opacity-hover);
}

button:active,
a:active {
  transform: scale(var(--interactive-scale-active));
}

button:focus,
a:focus {
  outline: none;
}

button:focus-visible,
a:focus-visible {
  outline: var(--focus-outline-width) solid var(--color-interactive);
  outline-offset: var(--focus-outline-offset);
  border-radius: var(--border-radius);
}

/* Remove default button styles */
button {
  background: none;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

/* Link styles */
a {
  text-decoration: none;
  color: var(--color-text);
}

a:hover {
  color: var(--color-interactive);
}

/* Icon link styles */
#icons a {
  padding: var(--spacing-xs);
  border-radius: var(--border-radius);
}

#icons a:hover {
  transform: translateY(var(--interactive-translate));
}

/* Menu button styles */
#menu button {
  background: none;
  border: none;
  padding: var(--spacing-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-all);
  opacity: 0.8;
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius);
}

#menu button img {
  width: 24px;
  height: 24px;
}

#menu button:hover {
  opacity: 1;
  transform: scale(var(--interactive-scale));
}

#menu button:active {
  transform: scale(var(--interactive-scale-active));
}

#menu button:focus {
  outline: none;
}

#menu button:focus-visible {
  outline: var(--focus-outline-width) solid var(--color-interactive);
  outline-offset: var(--focus-outline-offset);
  border-radius: var(--border-radius);
}

/* Phonetic button styles */
#title #phonetic button {
  margin-top: var(--spacing-xs);
}

#title #phonetic button:hover {
  transform: scale(var(--interactive-scale));
}

/* Remove duplicate styles */
#title #phonetic button:focus,
#menu button:focus,
#icons a:focus {
  outline: none;
}

#title #phonetic button:focus-visible,
#menu button:focus-visible,
#icons a:focus-visible {
  outline: var(--focus-outline-width) solid var(--color-interactive);
  outline-offset: var(--focus-outline-offset);
  border-radius: var(--border-radius);
}

#main {
  min-height: 100vh;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-md);
}

#hero {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: var(--spacing-md);
  max-width: var(--container-max-width);
  text-align: center;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
}

#title {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  position: relative;
  height: var(--title-height);
  margin-bottom: var(--spacing-md);
  cursor: pointer;
}

#title #phonetic {
  position: absolute;
  opacity: 0;
  transition: opacity var(--transition-duration);
  display: flex;
  gap: var(--spacing-xs);
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius);
  top: 0;
  left: 0;
  height: 100%;
}

#title #phonetic h1 {
  margin: 0.5rem 0;
  font-size: var(--font-size-xl);
  line-height: var(--line-height-base);
  padding: 0.4rem;
  padding-bottom: 0.6rem;
  white-space: nowrap;
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-wide);
}

#title #phonetic img {
  margin-top: var(--spacing-xs);
  height: var(--icon-size-lg);
}

#title #phonetic button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--spacing-xs);
  transition: var(--transition-all);
  opacity: 0.8;
}

#title #phonetic button:hover {
  opacity: 1;
  transform: scale(var(--scale-hover));
}

#title #phonetic button:active {
  transform: scale(var(--scale-active));
}

#title #phonetic button:focus {
  outline: none;
}

#title #phonetic button:focus-visible {
  outline: var(--focus-outline-width) solid var(--color-highlight);
  outline-offset: var(--focus-outline-offset);
  border-radius: var(--border-radius);
}

#title #ogi {
  margin: 0;
  font-size: var(--font-size-xxl);
  line-height: var(--line-height-base);
  padding: 0.4rem;
  padding-bottom: 1rem;
  opacity: 1;
  transition: opacity var(--transition-duration);
  letter-spacing: var(--letter-spacing-wide);
  text-shadow: var(--shadow-sm);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

#title:hover #ogi {
  opacity: 0;
}

#title:hover #phonetic {
  opacity: 1;
}

#hero h2 {
  font-size: var(--font-size-lg);
  margin: 0;
  font-family: "Roboto", sans-serif;
  font-weight: 300;
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
}

#icons {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  padding: var(--spacing-sm);
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-sm);
}

#icons a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xs);
  border-radius: var(--border-radius);
  transition: var(--transition-all);
  opacity: 0.8;
}

#icons a:hover {
  opacity: 1;
  transform: translateY(var(--translate-hover));
}

#icons a img {
  width: var(--icon-size-md);
  height: var(--icon-size-md);
  transition: var(--transition-all);
}

#menu {
  position: fixed;
  top: 0;
  width: 100%;
  height: var(--menu-height);
  display: flex;
  justify-content: flex-end;
  background-color: var(--color-background);
  z-index: var(--z-menu);
  transition: background-color var(--transition-duration)
    var(--transition-timing);
}

@media (max-width: 768px) {
  #title #phonetic h1 {
    font-size: calc(var(--font-size-xl) * 0.75);
  }

  #title #ogi {
    font-size: calc(var(--font-size-xxl) * 0.75);
  }

  #hero h2 {
    font-size: calc(var(--font-size-lg) * 0.8);
  }

  #icons {
    gap: var(--spacing-md);
  }
}

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

  #title #phonetic,
  #title #ogi,
  #icons a img,
  #menu button,
  #title #phonetic button {
    transition: none !important;
  }

  #title:hover #ogi,
  #title:hover #phonetic,
  #icons a:hover img,
  #menu button:hover,
  #title #phonetic button:hover {
    transform: none !important;
  }
}