/* sites/shared/letterpress-button.css
 * Day0 v2 button family. Ported from 信笾旅诗/tokens.js (template DESIGN.md).
 * Three variants: default (.lv-btn), primary (.lv-btn.primary), ghost
 * (.lv-btn.ghost). Hover/focus/active states follow the letterpress idiom —
 * subtle ink-stamp depression, no glow, no flat 'modern' fill swap.
 *
 * Depends on tokens.css being loaded first.
 */

.lv-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0.32em;
  color: var(--color-ink);
  background: var(--color-paper-2);
  border: 0.5px solid var(--color-rule);
  border-radius: 2px;
  box-shadow:
    inset 0 0 0 0.5px rgba(255, 250, 235, 0.7),
    0 1px 0 rgba(42, 37, 32, 0.06);
  cursor: pointer;
  transition:
    transform var(--duration-feedback) var(--ease-out-expo),
    box-shadow var(--duration-feedback) var(--ease-out-expo),
    background-color var(--duration-feedback) var(--ease-out-expo);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.lv-btn:hover {
  background: var(--color-paper-3);
}

.lv-btn:focus-visible {
  outline: 2px solid var(--color-ink);
  outline-offset: 3px;
}

.lv-btn:active {
  transform: translateY(1px);
  box-shadow:
    inset 0 1px 2px rgba(42, 37, 32, 0.18),
    0 0 0 rgba(42, 37, 32, 0);
}

.lv-btn[disabled],
.lv-btn[aria-disabled="true"] {
  opacity: 0.42;
  cursor: not-allowed;
  transform: none;
}

.lv-btn.primary {
  color: var(--color-paper);
  background: var(--color-ink);
  border-color: var(--color-ink);
  box-shadow: 0 1px 0 rgba(42, 37, 32, 0.18);
}

.lv-btn.primary:hover {
  background: #1f1b16;
}

.lv-btn.primary:active {
  background: #1a1612;
}

.lv-btn.ghost {
  background: transparent;
  border-color: var(--color-rule);
  color: var(--color-ink-2);
}

.lv-btn.ghost:hover {
  background: rgba(42, 37, 32, 0.04);
  color: var(--color-ink);
}

@media (prefers-reduced-motion: reduce) {
  .lv-btn,
  .lv-btn:hover,
  .lv-btn:active {
    transition: none;
    transform: none;
  }
}