:root {
  /* Colors */
  --btn-bg-primary: #267361;
  --btn-bg-primary-hover: #267361;
  --btn-bg-primary-active: #353030;

  --btn-text-light: #fefcfb;
  --btn-text-dark: #267361;

  --btn-border-primary: #267361;
  --btn-border-ghost: #e9e9e9;
  --btn-border-ghost-hover: #ececec;
  --btn-border-ghost-active: #e1e1e1;

  --btn-bg-ghost-hover: #ececec;
  --btn-bg-ghost-active: #e1e1e1;

  /* Disabled */
  --btn-bg-disabled: #cccccc;
  --btn-text-disabled: #888888;
  --btn-border-disabled: #cccccc;

  /* Focus */
  --btn-focus-ring: 3px solid #a9a9a9;
  --btn-focus-offset: 2px;

  /* Layout */
  --btn-py: 12px;
  --btn-px: 16px;
  --btn-py-lg: 16px;
  --btn-px-lg: 24px;
  --btn-radius: 50px;
  --btn-gap: 8px;
  --btn-max-height: 52px;
  --btn-icon-size: 18px;
  --btn-tertiary-px: 4px;

  /* Typography */
  --btn-font-family: var(--font-body);
  --btn-font-size: 0.889rem;
  --btn-font-weight: var(--font-weight-bold);
  --btn-line-height: 1;

  /* Shadow */
  --btn-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  --btn-shadow-none: none;

  /* Motion */
  --btn-transition:
    background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease,
    transform 0.25s ease, box-shadow 0.25s ease;
}

/* Base */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--btn-gap);
  padding: var(--btn-py) var(--btn-px);
  max-height: var(--btn-max-height);
  border: 2px solid transparent;
  border-radius: var(--btn-radius);
  font-family: var(--btn-font-family);
  font-size: var(--btn-font-size);
  font-weight: var(--btn-font-weight);
  line-height: var(--btn-line-height);
  white-space: nowrap;
  text-decoration: none;
  vertical-align: middle;
  cursor: pointer;
  user-select: none;
  transition: var(--btn-transition);
  -webkit-tap-highlight-color: transparent;
  z-index: 999;
}

.btn:focus {
  outline: none;
}

.btn:focus-visible {
  outline: var(--btn-focus-ring);
  outline-offset: var(--btn-focus-offset);
}

.btn .btn-icon {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  width: var(--btn-icon-size);
  height: var(--btn-icon-size);
  transition:
    transform 0.25s ease,
    color 0.25s ease;
}

.btn:hover .btn-icon.animate {
  transform: translateX(4px);
}

/* Filled */
.btn--filled {
  background-color: var(--btn-bg-primary);
  color: var(--btn-text-light);
  border-color: var(--btn-border-primary);
  box-shadow: var(--btn-shadow);
}

.btn--filled .btn-icon {
  color: currentColor;
}

.btn--filled:hover {
  background-color: var(--btn-bg-primary-hover);
  border-color: var(--btn-bg-primary-hover);
}

.btn--filled:active {
  background-color: var(--btn-bg-primary-active);
  border-color: var(--btn-bg-primary-active);
  transition: none;
}

/* Outline */
.btn--outline {
  background-color: transparent;
  color: var(--btn-text-dark);
  border-color: var(--btn-border-primary);
  box-shadow: var(--btn-shadow-none);
}

.btn--outline .btn-icon {
  color: currentColor;
}

.btn--outline:hover {
  background-color: var(--btn-bg-primary);
  border-color: var(--btn-bg-primary);
  color: var(--btn-text-light);
}

.btn--outline:active {
  background-color: var(--btn-bg-primary-active);
  border-color: var(--btn-bg-primary-active);
  color: var(--btn-text-light);
  transition: none;
}

/* Ghost */
.btn--ghost {
  background-color: transparent;
  color: var(--btn-text-dark);
  border-color: var(--btn-border-ghost);
  box-shadow: var(--btn-shadow-none);
}

.btn--ghost .btn-icon {
  color: currentColor;
}

.btn--ghost:hover {
  background-color: var(--btn-bg-ghost-hover);
  border-color: var(--btn-border-ghost-hover);
}

.btn--ghost:active {
  background-color: var(--btn-bg-ghost-active);
  border-color: var(--btn-border-ghost-active);
  transition: none;
}

/* Tertiary */
.btn--tertiary {
  background-color: transparent;
  color: var(--btn-text-dark);
  border-color: transparent;
  box-shadow: var(--btn-shadow-none);
  padding-inline: var(--btn-tertiary-px);
}

.btn--tertiary .btn-icon {
  color: currentColor;
}

.btn--tertiary:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.btn--tertiary:active {
  opacity: 0.7;
  transition: none;
}

/* Disabled */
.btn:disabled,
.btn[aria-disabled="true"] {
  background-color: var(--btn-bg-disabled) !important;
  border-color: var(--btn-border-disabled) !important;
  color: var(--btn-text-disabled) !important;
  box-shadow: none !important;
  text-decoration: none !important;
  cursor: default !important;
  pointer-events: none;
  transform: none !important;
}

.btn:disabled .btn-icon,
.btn[aria-disabled="true"] .btn-icon {
  color: var(--btn-text-disabled) !important;
}

/* Touch */
@media (hover: none) {
  .btn--filled:hover {
    background-color: var(--btn-bg-primary);
    border-color: var(--btn-bg-primary);
  }

  .btn--outline:hover {
    background-color: transparent;
    border-color: var(--btn-border-primary);
    color: var(--btn-text-dark);
  }

  .btn--ghost:hover {
    background-color: transparent;
    border-color: var(--btn-border-ghost);
  }

  .btn--tertiary:hover {
    text-decoration: none;
  }

  .btn:hover .btn-icon.animate {
    transform: none;
  }
}

@media (min-width: 768px) {
  .btn {
    padding: var(--btn-py-lg) var(--btn-px-lg);
    font-size: 1rem;
  }
}