.contact-board {
  position: fixed; right: env(safe-area-inset-right, 0px);
  bottom: max(24px, env(safe-area-inset-bottom)); z-index: 90;
  width: min(390px, calc(100vw - 32px)); color: #10110e;
  perspective: 850px;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}
.contact-board[hidden] { display: none; }
body.intro-open .contact-board, body.menu-open .contact-board { visibility: hidden; pointer-events: none; }
.contact-board-tab {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  writing-mode: vertical-rl; width: 38px; height: 126px; box-sizing: border-box;
  margin-left: auto; padding: 12px 9px; border: 0; border-radius: 3px 0 0 3px;
  background: #e84632; color: #10110e; font: 600 13px/1.1 "Helvetica Neue", Helvetica, Arial, sans-serif;
  cursor: pointer; box-shadow: 0 6px 24px #0002;
  transform-origin: right center;
  backface-visibility: hidden;
  transition: transform .55s cubic-bezier(.3,.1,.2,1), opacity .3s ease, background .2s;
}
.contact-board-tab:hover { background: #f47e27; transform: translateX(-3px); }
.contact-board.is-open .contact-board-tab { transform: rotateY(105deg); opacity: 0; pointer-events: none; }
.contact-board.is-open .contact-board-tab:focus-visible { transform: none; opacity: 1; pointer-events: auto; }
.contact-board-tab span { font-size: 19px; }
.contact-board-panel {
  position: absolute; bottom: 0; right: 12px; width: calc(100% - 12px); box-sizing: border-box;
  padding: 30px 28px 22px; border-radius: 6px 6px 0 6px;
  background: #f1edde; box-shadow: 0 12px 45px #0003;
  opacity: 0; visibility: hidden; transform: translateY(28px);
  transition: opacity .4s ease, transform .5s cubic-bezier(.2,.8,.2,1), visibility .5s;
  max-height: calc(100svh - 112px); overflow-y: auto; overscroll-behavior: contain;
}
.contact-board.is-open .contact-board-panel { opacity: 1; visibility: visible; transform: none; }
.contact-board-label, .contact-board-note { display: block; font: 11px/1.4 monospace; letter-spacing: .06em; text-transform: uppercase; }
.contact-board-label { color: #a52c1e; padding-right: 26px; }
.contact-board-handle { width: calc(100% - 26px); padding: 0; border: 0; background: none; text-align: left; cursor: grab; touch-action: none; user-select: none; }
.contact-board-handle span { float: right; font-size: 18px; line-height: .8; opacity: .6; }
.contact-board.is-dragging .contact-board-handle { cursor: grabbing; }
.contact-board.is-dragging { user-select: none; }
.contact-board.is-floating { right: auto; bottom: auto; }
.contact-board.is-floating .contact-board-panel { border-radius: 6px; bottom: 0; right: 0; width: 100%; }
.contact-board-panel h2 { font-size: 52px; line-height: 1; letter-spacing: -.065em; margin: 20px 0 14px; font-weight: 600; }
.contact-board-panel p { font-size: 17px; line-height: 1.4; margin: 0 0 24px; }
.contact-board-close { position: absolute; top: 13px; right: 13px; width: 36px; height: 36px; border: 0; background: transparent; color: inherit; font: 28px/1 sans-serif; cursor: pointer; }
.contact-board-link { display: block; position: relative; padding: 15px 24px 15px 0; border-top: 1px solid #10110e40; color: inherit; text-decoration: none; }
.contact-board-link span { display: block; font-size: 12px; margin-bottom: 6px; }
.contact-board-link strong { font-size: 17px; font-weight: 500; overflow-wrap: anywhere; }
.contact-board-link i { position: absolute; right: 0; top: 25px; font-size: 23px; font-style: normal; }
.contact-board-link:hover strong { text-decoration: underline; text-underline-offset: 4px; }
.contact-board-note { margin-top: 18px; font-size: 10px; }
.contact-board button:focus-visible, .contact-board a:focus-visible { outline: 2px solid #a52c1e; outline-offset: 4px; }
@media (max-width: 600px) {
  .contact-board { right: env(safe-area-inset-right, 0px); bottom: max(16px, env(safe-area-inset-bottom)); width: min(350px, calc(100vw - 32px)); }
  .contact-board-panel { padding: 26px 22px 20px; }
  .contact-board-tab { padding: 12px 9px; font-size: 13px; }
}
@media (prefers-reduced-motion: reduce) { .contact-board *, .contact-board-tab { transition: none; } }