.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

body.message-dialog-open,
body.puzzle-dialog-open {
  overflow: hidden;
}

.message-tree {
  position: relative;
  overflow: clip;
  color: #f7fbf5;
  background:
    radial-gradient(circle at 50% 2%, rgba(64, 176, 210, 0.3), transparent 27%),
    linear-gradient(180deg, #111113 0, #071a22 11%, #08271f 62%, #071711 100%);
}

.message-tree::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  opacity: 0.54;
  background-image:
    radial-gradient(circle at 18% 7%, rgba(255, 255, 255, 0.74) 0 1px, transparent 1.8px),
    radial-gradient(circle at 77% 15%, rgba(255, 255, 255, 0.5) 0 1px, transparent 1.8px),
    radial-gradient(circle at 36% 24%, rgba(154, 224, 255, 0.44) 0 1px, transparent 2px);
  background-size: 190px 230px, 280px 310px, 360px 410px;
}

.message-tree-intro {
  position: relative;
  z-index: 4;
  padding-top: clamp(110px, 12vw, 180px);
}

.message-tree-heading {
  max-width: 920px;
}

.message-tree-heading h2 {
  margin: 0;
  font-size: clamp(4rem, 9vw, 9rem);
  font-weight: 600;
  letter-spacing: -0.065em;
  line-height: 0.96;
}

.message-tree-heading h2 span[aria-hidden="true"] {
  display: inline-block;
  margin-inline: 0;
  color: #8edb61;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1em;
  font-weight: 400;
  line-height: 0.9;
  transform: translateY(-0.03em) rotate(-5deg);
}

.message-tree-question {
  margin: 38px 0 0;
  font-size: clamp(1.35rem, 2.8vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -0.025em;
}

.message-tree-aside {
  max-width: 680px;
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: clamp(1rem, 1.8vw, 1.2rem);
}

.message-review-note {
  display: flex;
  max-width: 760px;
  align-items: center;
  gap: 18px;
  margin-top: 44px;
  padding: 18px 22px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.075);
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
}

.message-review-note-mark {
  display: grid;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  color: #102217;
  background: #a9e96f;
  font-weight: 800;
}

.message-review-note p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
}

.message-review-note strong {
  color: #fff;
}

.message-tree-shell {
  position: relative;
  z-index: 2;
  width: min(1420px, 100%);
  height: 3100px;
  margin: 18px auto 0;
}

.message-tree-art {
  position: absolute;
  inset: 0;
  background: url("../assets/images/message-tree-v3.webp") center top / 100% 100% no-repeat;
  filter: drop-shadow(0 50px 70px rgba(0, 0, 0, 0.32));
}

.message-tag-layer {
  position: absolute;
  z-index: 5;
  inset: 0;
}

.message-tag {
  position: absolute;
  left: var(--tag-x);
  top: var(--tag-y);
  width: 70px;
  height: 122px;
  padding: 0;
  border: 0;
  color: #3b2518;
  background: transparent;
  cursor: pointer;
  transform: translate(-50%, -4px);
  transform-origin: 50% -28px;
}

.message-tag::before {
  position: absolute;
  top: -31px;
  left: 50%;
  width: 2px;
  height: 35px;
  content: "";
  background: linear-gradient(90deg, #b9893e, #f2d78c, #9b6e2b);
  box-shadow: 0 0 8px rgba(255, 221, 124, 0.36);
  transform: translateX(-50%);
}

.message-tag::after {
  position: absolute;
  top: -34px;
  left: 50%;
  width: 10px;
  height: 10px;
  border: 2px solid rgba(255, 246, 199, 0.88);
  border-radius: 50%;
  content: "";
  background: #d9ab4c;
  box-shadow: 0 0 0 4px rgba(255, 215, 109, 0.13), 0 0 15px rgba(255, 215, 109, 0.48);
  transform: translateX(-50%);
}

.message-tag-inner {
  position: relative;
  display: grid;
  width: 100%;
  height: 100%;
  place-items: center;
  overflow: hidden;
  padding: 15px 10px 12px;
  border: 2px solid #d8b966;
  border-radius: 10px 10px 20px 20px;
  background:
    linear-gradient(110deg, transparent 18%, rgba(255, 255, 255, 0.62) 44%, transparent 67%),
    linear-gradient(180deg, #fff9de, #eadba8 58%, #cab172 100%);
  box-shadow:
    0 16px 30px rgba(0, 0, 0, 0.28),
    inset 0 0 0 3px rgba(24, 70, 45, 0.2),
    inset 0 1px rgba(255, 255, 255, 0.9);
  transition: filter 320ms ease, transform 320ms cubic-bezier(0.2, 0.78, 0.22, 1), box-shadow 320ms ease;
}

.message-tag:nth-child(3n + 2) .message-tag-inner {
  background:
    linear-gradient(110deg, transparent 18%, rgba(255, 255, 255, 0.56) 44%, transparent 67%),
    linear-gradient(180deg, #e8f1d7, #c3d29c 58%, #93aa69 100%);
}

.message-tag:nth-child(4n) .message-tag-inner {
  background:
    linear-gradient(110deg, transparent 18%, rgba(255, 255, 255, 0.62) 44%, transparent 67%),
    linear-gradient(180deg, #e5f3ed, #b9d8ca 58%, #82ae9a 100%);
}

.message-tag-name {
  display: block;
  max-height: 92px;
  color: #183c2b;
  font-family: "STKaiti", "KaiTi", "PingFang SC", serif;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.15;
  text-shadow: 0 1px rgba(255, 255, 255, 0.56);
  writing-mode: vertical-rl;
  text-orientation: upright;
}

.message-tag:hover,
.message-tag:focus-visible {
  z-index: 15;
  outline: none;
}

.message-tag:hover .message-tag-inner,
.message-tag:focus-visible .message-tag-inner {
  filter: saturate(1.06) brightness(1.05);
  box-shadow:
    0 24px 42px rgba(0, 0, 0, 0.35),
    0 0 0 3px rgba(255, 225, 139, 0.28),
    inset 0 0 0 3px rgba(24, 70, 45, 0.18);
  transform: translateY(-7px) scale(1.035);
}

.message-tree-loading {
  position: absolute;
  z-index: 6;
  top: 120px;
  left: 50%;
  margin: 0;
  color: rgba(255, 255, 255, 0.62);
  transform: translateX(-50%);
}

.message-form-wrap {
  position: relative;
  z-index: 8;
  padding-bottom: clamp(100px, 12vw, 170px);
}

.message-form {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(420px, 1fr);
  gap: clamp(42px, 7vw, 100px);
  padding: clamp(32px, 6vw, 74px);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 38px;
  color: var(--ink);
  background: rgba(251, 251, 253, 0.96);
  box-shadow: 0 34px 100px rgba(0, 0, 0, 0.3);
}

.message-form-copy h3 {
  max-width: 430px;
  margin: 12px 0 20px;
  font-size: clamp(2.3rem, 5vw, 4.8rem);
  font-weight: 600;
  letter-spacing: -0.05em;
  line-height: 1.02;
}

.message-form-copy > p:last-child {
  max-width: 430px;
  margin: 0;
  color: var(--muted);
}

.message-form-fields {
  display: grid;
  gap: 22px;
}

.message-field {
  display: grid;
  gap: 9px;
}

.message-field > span {
  display: flex;
  justify-content: space-between;
  color: #313136;
  font-size: 0.92rem;
  font-weight: 650;
}

.message-field small,
.message-field b {
  color: var(--soft-muted);
  font-size: 0.94rem;
  font-weight: 600;
}

.message-field input,
.message-field textarea {
  width: 100%;
  border: 1px solid rgba(29, 29, 31, 0.13);
  border-radius: 18px;
  outline: none;
  color: var(--ink);
  background: #fff;
  font: inherit;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.message-field input {
  height: 56px;
  padding: 0 17px;
}

.message-field textarea {
  min-height: 116px;
  padding: 15px 17px;
  resize: vertical;
}

.message-field input:focus,
.message-field textarea:focus {
  border-color: rgba(0, 113, 227, 0.66);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
}

.message-field.is-invalid input,
.message-field.is-invalid textarea {
  border-color: #c94136;
  box-shadow: 0 0 0 4px rgba(201, 65, 54, 0.09);
}

.message-form-status {
  min-height: 22px;
  margin: -3px 0 -4px;
  color: #b3372d;
  font-size: 0.86rem;
}

.message-form-status.is-success {
  color: #24723f;
}

.message-save-button {
  display: flex;
  width: min(170px, 100%);
  min-height: 48px;
  align-items: center;
  justify-content: center;
  justify-self: center;
  padding: 0 28px;
  border: 0;
  border-radius: 999px;
  color: #fff;
  background: #173f2c;
  cursor: pointer;
  transition: background 180ms ease, transform 180ms ease;
}

.message-save-button:hover,
.message-save-button:focus-visible {
  background: #1f583b;
  transform: translateY(-2px);
}

.message-save-button:disabled {
  cursor: wait;
  opacity: 0.64;
  transform: none;
}

.message-review-toast {
  position: fixed;
  z-index: 180;
  top: calc(var(--header-height) + 16px);
  left: 50%;
  display: grid;
  width: min(620px, calc(100% - 32px));
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 13px 14px 13px 18px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 18px;
  color: #fff;
  background: rgba(15, 54, 36, 0.92);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.26);
  backdrop-filter: blur(18px);
  transform: translate(-50%, -18px);
  opacity: 0;
  transition: opacity 240ms ease, transform 240ms ease;
}

.message-review-toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.message-review-toast > span {
  padding: 5px 9px;
  border-radius: 999px;
  color: #173f2c;
  background: #bce98c;
  font-size: 0.7rem;
  font-weight: 750;
  white-space: nowrap;
}

.message-review-toast p {
  margin: 0;
  font-size: 0.86rem;
}

.message-review-toast button {
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 50%;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  cursor: pointer;
}

.message-dialog,
.puzzle-dialog {
  position: fixed;
  z-index: 220;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  visibility: hidden;
  background: rgba(4, 12, 9, 0.66);
  opacity: 0;
  backdrop-filter: blur(16px);
  transition: opacity 180ms ease, visibility 180ms ease;
}

.message-dialog.is-open,
.puzzle-dialog.is-open {
  visibility: visible;
  opacity: 1;
}

.message-dialog-panel {
  position: relative;
  width: min(480px, 100%);
  min-height: 320px;
  padding: 70px 48px 45px;
  border: 1px solid rgba(92, 47, 20, 0.18);
  border-radius: 22px 22px 34px 34px;
  color: #432817;
  background:
    linear-gradient(90deg, rgba(96, 47, 16, 0.04) 1px, transparent 1px) 0 0 / 24px 100%,
    linear-gradient(180deg, #fff2c4, #efbd6b 70%, #d5834c);
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.45), inset 0 1px rgba(255, 255, 255, 0.8);
  transform: translateY(18px) rotate(-1deg);
  transition: transform 220ms ease;
}

.message-dialog.is-open .message-dialog-panel,
.puzzle-dialog.is-open .puzzle-dialog-panel {
  transform: translateY(0) rotate(0);
}

.message-dialog-knot {
  position: absolute;
  top: 26px;
  left: 50%;
  width: 14px;
  height: 14px;
  border: 4px solid rgba(106, 58, 27, 0.74);
  border-radius: 50%;
  transform: translateX(-50%);
}

.message-dialog-label {
  margin: 0 0 12px;
  color: rgba(67, 40, 23, 0.62);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.message-dialog-panel h3 {
  margin: 0;
  font-family: "STKaiti", "KaiTi", serif;
  font-size: 2rem;
}

.message-dialog-panel > p:last-child {
  margin: 26px 0 0;
  font-family: "STKaiti", "KaiTi", serif;
  font-size: clamp(1.25rem, 4vw, 1.65rem);
  line-height: 1.65;
}

.message-dialog-close,
.puzzle-dialog-close {
  position: absolute;
  z-index: 4;
  top: 15px;
  right: 15px;
  width: 38px;
  height: 38px;
  border: 0;
  border-radius: 50%;
  color: currentColor;
  background: rgba(255, 255, 255, 0.22);
  cursor: pointer;
}

.puzzle-dialog-panel {
  position: relative;
  width: min(760px, 100%);
  padding: clamp(24px, 5vw, 42px);
  border: 1px solid rgba(255, 255, 255, 0.84);
  border-radius: 32px;
  color: var(--ink);
  background: linear-gradient(155deg, #ffffff 0%, #f6f8fb 62%, #edf3f4 100%);
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.46), inset 0 1px rgba(255, 255, 255, 0.9);
  transform: translateY(18px);
  transition: transform 220ms ease;
}

.puzzle-kicker {
  display: inline-block;
  margin: 0 0 14px;
  padding: 7px 11px;
  border: 1px solid #d6e5ec;
  border-radius: 999px;
  color: #466573;
  background: #edf5f9;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.puzzle-dialog-panel h3 {
  margin: 0;
  font-size: clamp(1.5rem, 4vw, 2.3rem);
  letter-spacing: -0.035em;
}

.puzzle-dialog-tip {
  margin: 10px 0 22px;
  color: var(--muted);
  font-size: 0.9rem;
}

.puzzle-scene {
  position: relative;
  aspect-ratio: 2.25 / 1;
  overflow: hidden;
  border-radius: 22px;
  background-color: #c7d8e1;
  background-position: center;
  background-size: 100% 100%;
  box-shadow: 0 19px 42px rgba(35, 60, 71, 0.19), inset 0 0 0 4px #fff;
  isolation: isolate;
}

.puzzle-scene::after {
  position: absolute;
  z-index: 1;
  inset: 0;
  pointer-events: none;
  content: "";
  background: linear-gradient(180deg, transparent 64%, rgba(3, 18, 25, 0.2));
}

.puzzle-scene-name {
  position: absolute;
  z-index: 3;
  bottom: 14px;
  left: 17px;
  padding: 7px 11px;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 999px;
  color: #fff;
  background: rgba(10, 29, 38, 0.38);
  font-size: 0.73rem;
  letter-spacing: 0.08em;
  backdrop-filter: blur(8px);
}

.puzzle-gap,
.puzzle-piece {
  position: absolute;
  z-index: 2;
  top: var(--piece-y, 40%);
  width: var(--piece-size, 58px);
  height: var(--piece-size, 58px);
  clip-path: polygon(4% 4%, 34% 4%, 35% 10%, 40% 3%, 46% 0, 54% 0, 60% 3%, 65% 10%, 66% 4%, 96% 4%, 96% 34%, 90% 35%, 97% 40%, 100% 46%, 100% 54%, 97% 60%, 90% 65%, 96% 66%, 96% 96%, 66% 96%, 65% 90%, 60% 97%, 54% 100%, 46% 100%, 40% 97%, 35% 90%, 34% 96%, 4% 96%, 4% 66%, 10% 65%, 3% 60%, 0 54%, 0 46%, 3% 40%, 10% 35%, 4% 34%);
}

.puzzle-gap {
  left: var(--target-x, 68%);
  background: linear-gradient(145deg, rgba(8, 23, 33, 0.72), rgba(30, 53, 61, 0.5));
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.96), inset 0 10px 18px rgba(0, 0, 0, 0.28);
  filter: drop-shadow(0 0 2px rgba(255, 255, 255, 0.9));
  transition: opacity 220ms ease;
}

.puzzle-piece {
  left: var(--piece-left, 12px);
  background-image: var(--scene-image);
  background-repeat: no-repeat;
  filter: drop-shadow(0 0 1px rgba(255, 255, 255, 0.95)) drop-shadow(0 9px 10px rgba(3, 19, 27, 0.46));
  transition: filter 180ms ease, opacity 180ms ease;
}

.puzzle-scene.is-success .puzzle-piece {
  filter: drop-shadow(0 0 12px rgba(184, 255, 196, 0.92));
}

.puzzle-scene.is-success .puzzle-gap {
  opacity: 0;
}

.puzzle-scene.is-unavailable .puzzle-gap,
.puzzle-scene.is-unavailable .puzzle-piece {
  opacity: 0;
}

.puzzle-scene.is-failed {
  animation: puzzle-shake 260ms ease;
}

@keyframes puzzle-shake {
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.puzzle-slider {
  position: relative;
  height: 58px;
  margin-top: 18px;
  overflow: hidden;
  border-radius: 999px;
  color: #74828a;
  background: linear-gradient(180deg, #e6edf0, #e9edf0);
  text-align: center;
  line-height: 58px;
  user-select: none;
  touch-action: none;
}

.puzzle-slider::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--slider-progress, 58px);
  content: "";
  border-radius: inherit;
  background: linear-gradient(90deg, rgba(0, 113, 227, 0.26), rgba(0, 113, 227, 0.08));
}

.puzzle-slider button {
  position: absolute;
  top: 0;
  left: var(--handle-left, 0px);
  width: 68px;
  height: 58px;
  border: 0;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(145deg, #1885ef, #0063d2);
  box-shadow: 0 8px 20px rgba(0, 113, 227, 0.28), inset 0 1px rgba(255, 255, 255, 0.38);
  cursor: grab;
  font-size: 1.25rem;
  touch-action: none;
}

.puzzle-slider button:active {
  cursor: grabbing;
}

.puzzle-slider button:focus-visible {
  outline: 3px solid #173f2c;
  outline-offset: -4px;
}

.puzzle-slider button:disabled {
  cursor: default;
}

.puzzle-actions {
  display: flex;
  min-height: 38px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 10px;
}

.puzzle-refresh {
  padding: 7px 0;
  border: 0;
  color: var(--blue);
  background: transparent;
  cursor: pointer;
}

.puzzle-actions p {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: right;
}

.puzzle-actions p.is-error { color: #b3372d; }
.puzzle-actions p.is-success { color: #24723f; }

.turnstile-slot {
  margin-top: 14px;
}

.turnstile-status {
  min-height: 1.4em;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.turnstile-status.is-error { color: #b3372d; }
.turnstile-status.is-success { color: #24723f; }

.turnstile-retry {
  margin-top: 6px;
  padding: 0;
  border: 0;
  background: none;
  color: #0d64ad;
  font: inherit;
  font-size: 0.85rem;
  text-decoration: underline;
  cursor: pointer;
}

@media (max-width: 900px) {
  .message-tree-shell {
    height: 4200px;
  }

  .message-form {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .message-tree-intro {
    padding-top: 96px;
  }

  .message-tree-heading h2 {
    font-size: clamp(3.7rem, 19vw, 5.4rem);
  }

  .message-tree-question {
    margin-top: 30px;
  }

  .message-review-note {
    align-items: flex-start;
    padding: 16px;
  }

  .message-tree-shell {
    height: 5000px;
  }

  .message-tag {
    width: 58px;
    height: 108px;
  }

  .message-tag-name {
    max-height: 82px;
    font-size: 12px;
  }

  .message-form-wrap {
    width: calc(100% - 28px);
  }

  .message-form {
    gap: 32px;
    padding: 28px 20px;
    border-radius: 28px;
  }

  .message-form-copy h3 {
    font-size: 2.55rem;
  }

  .message-review-toast {
    grid-template-columns: 1fr auto;
  }

  .message-review-toast > span {
    display: none;
  }

  .message-dialog,
  .puzzle-dialog {
    align-items: end;
    padding: 12px;
  }

  .message-dialog-panel,
  .puzzle-dialog-panel {
    width: 100%;
    max-height: calc(100svh - 24px);
    overflow-y: auto;
    border-radius: 24px;
  }

  .message-dialog-panel {
    min-height: 300px;
    padding: 65px 28px 36px;
  }

  .puzzle-dialog-panel {
    padding: 26px 18px 20px;
  }

  .puzzle-scene {
    border-radius: 14px;
  }

}

@media (prefers-reduced-motion: reduce) {
  .message-tag,
  .message-tag:hover,
  .message-tag:focus-visible,
  .message-tag-inner,
  .message-review-toast,
  .message-dialog,
  .puzzle-dialog,
  .puzzle-gap,
  .puzzle-piece {
    animation: none !important;
    transition: none !important;
  }
}