/* Kodza — Fill Button
   The fill grows from the exact point the pointer enters, and leaves where it exits.
   Everything is tuned with the --kz-fill-* variables. */
.kodza-fill-button {
  --kz-fill-fg: #0a0a0a;
  --kz-fill-bg: transparent;
  --kz-fill-border: rgba(10, 10, 10, 0.9);
  --kz-fill-fill: #0a0a0a;
  --kz-fill-fill-fg: #ffffff;
  --kz-fill-radius: 999px;
  --kz-fill-height: 52px;
  --kz-fill-pad-x: 28px;
  --kz-fill-gap: 10px;
  --kz-fill-duration: 0.65s;
  --kz-fill-ease: cubic-bezier(0.22, 1, 0.36, 1);

  position: relative;
  display: inline-grid;
  height: var(--kz-fill-height);
  padding: 0;
  border: 0;
  border-radius: var(--kz-fill-radius);
  background: var(--kz-fill-bg);
  box-shadow: inset 0 0 0 1.5px var(--kz-fill-border);
  color: var(--kz-fill-fg);
  font: inherit;
  font-weight: 500;
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  overflow: hidden;
  isolation: isolate;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.25s var(--kz-fill-ease);
}

.kodza-fill-button:active {
  transform: scale(0.97);
}

.kodza-fill-button:focus-visible {
  outline: 2px solid var(--kz-fill-fill);
  outline-offset: 3px;
}

/* The content exists twice: underneath (resting colors) and inside the fill
   (inverted colors). The circle reveals the second copy, so the text changes
   color exactly under the edge of the circle. */
.kodza-fill-button__content,
.kodza-fill-button__fill {
  grid-area: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--kz-fill-gap);
  padding: 0 var(--kz-fill-pad-x);
}

.kodza-fill-button__fill {
  background: var(--kz-fill-fill);
  color: var(--kz-fill-fill-fg);
  clip-path: circle(0% at var(--kz-x, 50%) var(--kz-y, 50%));
  transition: clip-path var(--kz-fill-duration) var(--kz-fill-ease);
  pointer-events: none;
}

.kodza-fill-button.is-hover .kodza-fill-button__fill,
.kodza-fill-button:focus-visible .kodza-fill-button__fill {
  clip-path: circle(150% at var(--kz-x, 50%) var(--kz-y, 50%));
}

/* Rolling label: the line leaves through the top, its copy comes in from below */
.kodza-fill-button__label {
  position: relative;
  display: block;
  overflow: hidden;
  line-height: 1.25;
}

.kodza-fill-button__label > span {
  display: block;
  transition: transform var(--kz-fill-duration) var(--kz-fill-ease);
}

.kodza-fill-button__label > span::after {
  content: attr(data-text);
  position: absolute;
  top: 100%;
  left: 0;
}

.kodza-fill-button.is-hover .kodza-fill-button__label > span,
.kodza-fill-button:focus-visible .kodza-fill-button__label > span {
  transform: translateY(-100%);
}

/* Optional arrow: it leaves on the right and comes back from the left */
.kodza-fill-button__icon {
  position: relative;
  display: block;
  width: 1em;
  height: 1em;
  overflow: hidden;
}

.kodza-fill-button__icon svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transition: transform var(--kz-fill-duration) var(--kz-fill-ease);
}

.kodza-fill-button__icon svg + svg {
  transform: translateX(-110%);
}

.kodza-fill-button.is-hover .kodza-fill-button__icon svg,
.kodza-fill-button:focus-visible .kodza-fill-button__icon svg {
  transform: translateX(110%);
}

.kodza-fill-button.is-hover .kodza-fill-button__icon svg + svg,
.kodza-fill-button:focus-visible .kodza-fill-button__icon svg + svg {
  transform: translateX(0);
}

/* Solid variant: the button starts filled, the circle brings the accent color */
.kodza-fill-button--solid {
  --kz-fill-bg: #0a0a0a;
  --kz-fill-fg: #ffffff;
  --kz-fill-border: transparent;
  --kz-fill-fill: #e9e9e6;
  --kz-fill-fill-fg: #0a0a0a;
}

/* Without JavaScript: the button simply swaps colors on hover */
.kodza-fill-button:not(.is-ready):hover {
  background: var(--kz-fill-fill);
  color: var(--kz-fill-fill-fg);
}

@media (prefers-reduced-motion: reduce) {
  .kodza-fill-button,
  .kodza-fill-button__fill,
  .kodza-fill-button__label > span,
  .kodza-fill-button__icon svg {
    transition-duration: 0.01ms;
  }
}

/* Theming example — on a dark background:
.dark-section .kodza-fill-button {
  --kz-fill-fg: #ffffff;
  --kz-fill-border: rgba(255, 255, 255, 0.85);
  --kz-fill-fill: #ffffff;
  --kz-fill-fill-fg: #0a0a0a;
}
*/