/* Reusable components: buttons, cards, chips, form controls. */

/* -------------------- Buttons -------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: var(--sp-4) var(--sp-6);
  min-height: 52px;
  font-weight: 700;
  letter-spacing: -0.005em;
  border: var(--border) solid transparent;
  transition: background var(--dur-2) var(--ease),
    color var(--dur-2) var(--ease),
    border-color var(--dur-2) var(--ease),
    transform var(--dur-1) var(--ease);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: var(--bright-blue);
  color: var(--deep-navy);
  border-color: var(--bright-blue);
}

.btn--primary:hover {
  background: var(--bright-blue-hover);
  border-color: var(--bright-blue-hover);
}

.btn--primary:focus-visible {
  outline-offset: 3px;
}

.btn--ghost-dark {
  background: transparent;
  color: var(--cream);
  border-color: var(--line-dark-strong);
}

.btn--ghost-dark:hover {
  border-color: var(--bright-blue);
  color: var(--bright-blue);
}

.btn--ghost-light {
  background: transparent;
  color: var(--deep-navy);
  border-color: var(--deep-navy);
}

.btn--ghost-light:hover {
  background: var(--deep-navy);
  color: var(--cream);
}

.btn--solid-dark {
  background: var(--deep-navy);
  color: var(--cream);
  border-color: var(--deep-navy);
}

.btn--solid-dark:hover {
  background: var(--charcoal);
}

.btn--lg {
  min-height: 60px;
  padding-inline: var(--sp-8);
  font-size: var(--fs-body-lg);
}

.btn--block {
  width: 100%;
}

.btn .arrow {
  display: inline-block;
  transition: transform var(--dur-2) var(--ease);
}

.btn:hover .arrow {
  transform: translateX(4px);
}

.btn[disabled],
.btn[aria-busy="true"] {
  opacity: 0.65;
  cursor: not-allowed;
  pointer-events: none;
}

/* Inline text arrow link */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-weight: 600;
  color: var(--bright-blue);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color var(--dur-2) var(--ease);
}

.link-arrow:hover {
  border-bottom-color: currentColor;
}

.on-light .link-arrow {
  color: var(--steel);
}

/* -------------------- Chips -------------------- */

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  font-size: var(--fs-body-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  border: var(--border) solid var(--line-dark-strong);
  color: var(--cream);
  background: rgba(255, 255, 255, 0.03);
}

.chip::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--bright-blue);
  box-shadow: 0 0 10px var(--glow);
  flex-shrink: 0;
}

.on-light .chip {
  border-color: var(--line-light-strong);
  color: var(--text);
  background: #ffffff;
}

.on-light .chip::before {
  background: var(--steel);
  box-shadow: none;
}

/* -------------------- Cards -------------------- */

.card {
  padding: var(--sp-6);
  border: var(--border) solid var(--line, var(--line-light));
  background: var(--surface-raised, #fff);
  color: var(--fg, var(--text));
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  transition: transform var(--dur-2) var(--ease),
    border-color var(--dur-2) var(--ease);
}

.on-dark .card {
  background: var(--surface-navy-raised);
  border-color: var(--line-dark);
}

.on-dark .card:hover {
  border-color: var(--bright-blue);
  transform: translateY(-2px);
}

.on-light .card {
  background: #ffffff;
  border-color: var(--line-light-strong);
  box-shadow: var(--shadow-hard-sm);
  transition: transform var(--dur-2) var(--ease),
    box-shadow var(--dur-2) var(--ease);
}

.on-light .card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 var(--deep-navy);
}

.card__eyebrow {
  font-size: var(--fs-eyebrow);
  text-transform: uppercase;
  letter-spacing: var(--ls-eyebrow);
  color: var(--fg-dim, var(--text-light));
  font-weight: 600;
}

.on-dark .card__eyebrow {
  color: var(--bright-blue);
}

.card__title {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.card__body {
  font-size: var(--fs-body);
  color: var(--fg-dim, var(--text-light));
  line-height: 1.55;
}

.card__list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-top: var(--sp-2);
}

.card__list li {
  display: flex;
  gap: var(--sp-2);
  font-size: var(--fs-body-sm);
  color: var(--fg-dim, var(--text-light));
  line-height: 1.5;
}

.card__list li::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--bright-blue);
  margin-top: 0.65em;
  flex-shrink: 0;
}

/* Step card (How it works) */
.step-card {
  position: relative;
  padding: var(--sp-6);
  padding-top: var(--sp-12);
  border: var(--border) solid var(--line, var(--line-light));
  background: var(--surface-raised);
  min-height: 220px;
}

.on-dark .step-card {
  background: transparent;
  border-color: var(--line-dark);
}

.step-card__num {
  position: absolute;
  top: var(--sp-4);
  left: var(--sp-6);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--bright-blue);
  font-weight: 600;
}

.step-card__label {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.015em;
}

.step-card__body {
  margin-top: var(--sp-3);
  color: var(--fg-dim, var(--text-light));
  font-size: var(--fs-body);
  line-height: 1.55;
}

/* -------------------- Form controls -------------------- */

.radio-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-4) var(--sp-5);
  min-height: 60px;
  border: var(--border) solid var(--line-light-strong);
  background: #ffffff;
  cursor: pointer;
  transition: border-color var(--dur-1) var(--ease),
    background var(--dur-1) var(--ease),
    box-shadow var(--dur-1) var(--ease);
  font-weight: 500;
  color: var(--text);
  line-height: 1.3;
}

.radio-card:hover {
  border-color: var(--deep-navy);
}

.radio-card input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.radio-card__dot {
  width: 18px;
  height: 18px;
  border: 2px solid var(--line-light-strong);
  flex-shrink: 0;
  display: inline-grid;
  place-items: center;
  transition: border-color var(--dur-1) var(--ease);
}

.radio-card__dot::after {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--bright-blue);
  transform: scale(0);
  transition: transform var(--dur-1) var(--ease);
}

.radio-card:has(input:checked) {
  border-color: var(--deep-navy);
  background: var(--cream);
  box-shadow: 4px 4px 0 var(--deep-navy);
  transform: translate(-2px, -2px);
}

.radio-card:has(input:checked) .radio-card__dot {
  border-color: var(--deep-navy);
  background: var(--deep-navy);
}

.radio-card:has(input:checked) .radio-card__dot::after {
  transform: scale(1);
}

.radio-card input:focus-visible ~ .radio-card__label,
.radio-card:has(input:focus-visible) {
  outline: 2px solid var(--bright-blue);
  outline-offset: 2px;
}

.text-input {
  display: block;
  width: 100%;
  padding: var(--sp-4) var(--sp-4);
  min-height: 56px;
  border: var(--border) solid var(--line-light-strong);
  background: #ffffff;
  font-size: var(--fs-body);
  transition: border-color var(--dur-1) var(--ease);
}

.text-input:focus {
  border-color: var(--deep-navy);
  outline: 2px solid var(--bright-blue);
  outline-offset: 2px;
}

.text-input[aria-invalid="true"] {
  border-color: var(--ember);
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.field__label {
  font-size: var(--fs-body-sm);
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0;
}

.field__hint {
  font-size: 0.8125rem;
  color: var(--text-light);
}

.field__error {
  font-size: 0.8125rem;
  color: var(--ember);
  font-weight: 600;
  min-height: 1em;
}

.fieldset-stack {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  border: 0;
  padding: 0;
  margin: 0;
}

.fieldset-stack legend {
  font-size: var(--fs-body-sm);
  font-weight: 600;
  color: var(--text-light);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--sp-3);
  padding: 0;
}

/* -------------------- Spinner -------------------- */

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  animation: spin 0.9s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* -------------------- Divider -------------------- */

.divider {
  height: 1px;
  background: var(--line, var(--line-light));
  border: 0;
  margin: 0;
}