@keyframes g42FadeIn {
  from {
    opacity: 0;
    transform: scale(0.82);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

svg * {
  transform-box: fill-box;
  transform-origin: center;
}

:root {
  --font-family-sans: ui-sans-serif, system-ui, sans-serif;
  --transition-speed: 120ms;
  /* Spacing */
  --size-button: 36px;
  --size-icon: 14px;
  --size-icon-sm: 16px;
  --gap-header: 20px;
  --padding-header: 15px 20px;
  --padding-button: 6px 12px;
  --padding-tooltip: 11px 15px;
  --padding-pill: 2px 6px;
  /* Border & Radius */
  --border-radius: 6px;
  --border-radius-lg: 10px;
  --border-width: 1px;
  --border-width-thick: 1.8px;
  /* Backdrop */
  --backdrop-blur: 10px;
  --backdrop-blur-sm: 8px;
  /* Z-index */
  --z-header: 1000;
  --z-tooltip: 100;
}

/* Dark theme (default) */
[data-theme="dark"] {
  --color-primary: #1ae0c8;
  --color-accent: #0a0e1a;
  --color-dark: #051a14;
  --color-text: #7ab5b0;
  --color-border: rgba(26, 224, 200, 0.3);
  --color-background: linear-gradient(135deg, #0a0e1a 0%, #0f1729 50%, #0a0e1a 100%);
  --color-header-bg: rgba(6, 16, 34, 0.95);
  --color-tooltip-bg: rgba(6, 16, 34, 0.97);
  --color-pill-bg: rgba(26, 224, 200, 0.1);
  --color-footer: rgba(26, 224, 200, 0.3);
  --color-tag-label: #3d8a80;
  --color-node-text: #000000;
}

/* Light theme */
[data-theme="light"] {
  --color-primary: #0d9488;
  --color-accent: #f8fafc;
  --color-dark: #f1f5f9;
  --color-text: #475569;
  --color-border: rgba(13, 148, 136, 0.3);
  --color-background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #f8fafc 100%);
  --color-header-bg: rgba(248, 250, 252, 0.95);
  --color-tooltip-bg: rgba(248, 250, 252, 0.97);
  --color-pill-bg: rgba(13, 148, 136, 0.1);
  --color-footer: rgba(13, 148, 136, 0.3);
  --color-tag-label: #0f766e;
  --color-node-text: #000000;
}

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

html,
body {
  width: 100%;
  height: 100%;
  background: var(--color-background);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  font-family: var(--font-family-sans);
  color: var(--color-primary);
}

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  background: var(--color-header-bg);
  backdrop-filter: blur(var(--backdrop-blur));
  -webkit-backdrop-filter: blur(var(--backdrop-blur));
  border-bottom: var(--border-width) solid var(--color-border);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--padding-header);
  max-width: 1200px;
  margin: 0 auto;
}

.header-left .header-title {
  color: var(--color-primary);
  font-size: clamp(14px, 2.5vw, 18px);
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  opacity: 0.8;
}

.header-link {
  text-decoration: none;
}

.header-right {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--gap-header);
}

.email-link,
.button {
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: clamp(12px, 2vw, 14px);
  font-weight: 500;
  padding: var(--padding-button);
  height: var(--size-button);
  cursor: pointer;
  transition: color var(--transition-speed), border-color var(--transition-speed), opacity 300ms ease, transform 300ms ease;
}

.email-link {
  color: var(--color-text);
  text-decoration: none;
}

.email-link:hover,
.button:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

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

.button.hiding {
  opacity: 0;
  transform: scale(0.8);
  pointer-events: none;
}

.button svg,
.email-icon {
  width: var(--size-icon);
  height: var(--size-icon);
  flex-shrink: 0;
}

#theme-btn {
  position: relative;
  width: var(--size-button);
  height: var(--size-button);
  display: flex;
  align-items: center;
  justify-content: center;
}

#theme-btn svg {
  transition: opacity var(--transition-speed);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: var(--size-icon-sm);
  height: var(--size-icon-sm);
}

#replay-btn {
  width: var(--size-button);
  height: var(--size-button);
  display: flex;
  align-items: center;
  justify-content: center;
}

#replay-btn svg {
  width: var(--size-icon-sm);
  height: var(--size-icon-sm);
}

[data-theme="dark"] #theme-btn .sun-icon {
  opacity: 0;
}

[data-theme="light"] #theme-btn .moon-icon {
  opacity: 0;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

svg {
  display: block;
  width: 100%;
  height: 100%;
}

.nd {
  cursor: pointer;
  transition: opacity var(--transition-speed);
}

.nd circle {
  transition: opacity var(--transition-speed);
}

.nd:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

#tip {
  position: fixed;
  background: var(--color-tooltip-bg);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--padding-tooltip);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-speed);
  max-width: 220px;
  z-index: var(--z-tooltip);
  backdrop-filter: blur(var(--backdrop-blur-sm));
  -webkit-backdrop-filter: blur(var(--backdrop-blur-sm));
}

.tn {
  font:
    700 13px/1.3 var(--font-family-sans);
  color: var(--color-primary);
  margin-bottom: 3px;
}

.tl {
  font:
    600 9px/1 var(--font-family-sans);
  color: var(--color-tag-label);
  margin-bottom: 7px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
}

.td {
  font:
    400 11px/1.6 var(--font-family-sans);
  color: var(--color-text);
}

.pill {
  padding: var(--padding-pill);
  border-radius: var(--border-radius);
  font-size: 8px;
  font-weight: 700;
}

footer {
  margin-top: clamp(12px, 3vw, 20px);
  font-size: clamp(10px, 2vw, 12px);
  color: var(--color-footer);
  letter-spacing: 2px;
  text-transform: uppercase;
  text-align: center;
}

@media (max-width: 480px) {
  #tip {
    max-width: 180px;
    font-size: 10px;
  }
  .header-content {
    padding: 12px 15px;
    flex-direction: column;
    gap: 10px;
    align-items: flex-start;
  }
  .email-link {
    font-size: 11px;
  }
  .email-icon {
    width: 14px;
    height: 14px;
  }
}

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