.hanoi-main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 64px 0 90px;
}

.hanoi-hero-card {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 28px;
  align-items: center;
  margin-bottom: 28px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background:
    radial-gradient(circle at 12% 10%, rgba(215, 239, 114, .42), transparent 28%),
    radial-gradient(circle at 86% 12%, rgba(30, 89, 61, .12), transparent 24%),
    linear-gradient(135deg, rgba(255, 253, 248, .96), rgba(242, 243, 233, .92));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hanoi-hero-card:before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(30, 89, 61, .12) 1px, transparent 1px);
  background-size: 22px 22px;
  mask-image: linear-gradient(90deg, rgba(0,0,0,.35), transparent 78%);
  pointer-events: none;
}

.hanoi-hero-copy,
.hanoi-hero-visual {
  position: relative;
  z-index: 1;
}

.hanoi-hero-copy h1 {
  margin: 16px 0 12px;
  font: 600 clamp(42px, 5vw, 62px)/1.02 Georgia, "Songti SC", serif;
  letter-spacing: -2px;
}

.hanoi-hero-copy p {
  max-width: 640px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
  margin: 0;
}

.hanoi-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.hanoi-hero-tags span {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .72);
  color: var(--green);
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 800;
}

.hanoi-hero-visual {
  min-height: 210px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, .72), rgba(238, 241, 231, .88)),
    radial-gradient(circle at 50% 0%, rgba(215, 239, 114, .42), transparent 46%);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  align-items: end;
  padding: 22px 18px 34px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .7), 0 16px 34px rgba(23, 34, 28, .08);
}

.mini-tower {
  position: relative;
  height: 150px;
}

.mini-tower i {
  position: absolute;
  left: 50%;
  bottom: 12px;
  width: 5px;
  height: 118px;
  transform: translateX(-50%);
  border-radius: 99px;
  background: linear-gradient(180deg, #aeb8b4, #73817c);
}

.mini-tower b {
  position: absolute;
  left: 6%;
  right: 6%;
  bottom: 8px;
  height: 9px;
  border-radius: 999px;
  background: #82908a;
}

.mini-tower span {
  position: relative;
  z-index: 1;
  display: block;
  width: var(--w);
  height: 16px;
  margin: 0 auto 5px;
  top: 86px;
  border-radius: 999px;
  background: var(--c);
  box-shadow: 0 5px 12px rgba(23, 34, 28, .13);
}

.mini-tower.active {
  filter: saturate(1.08);
}

.hanoi-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 24px;
  align-items: stretch;
}

.hanoi-board-panel {
  padding: 26px;
  position: relative;
  overflow: hidden;
}

.hanoi-board-panel:before {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  right: -160px;
  top: -170px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(215, 239, 114, .42), transparent 65%);
  pointer-events: none;
}

.hanoi-board-top {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.hanoi-board-top h2 {
  margin: 8px 0 0;
  font: 500 32px/1.1 Georgia, "Songti SC", serif;
  letter-spacing: -1px;
}

.hanoi-progress-wrap {
  min-width: 210px;
  display: grid;
  gap: 8px;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  text-align: right;
}

.hanoi-progress-wrap i {
  display: block;
  height: 8px;
  border-radius: 999px;
  background: #e4e6dd;
  overflow: hidden;
}

.hanoi-progress-wrap b {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--green), #70a86a, var(--lime));
  transition: width .25s ease;
}

.hanoi-board {
  position: relative;
  min-height: 430px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  align-items: end;
  border-radius: 22px;
  background:
    radial-gradient(circle at 50% 0%, rgba(215, 239, 114, .32), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, .9), rgba(238, 241, 231, .94)),
    radial-gradient(circle at 20px 20px, rgba(30, 89, 61, .08) 2px, transparent 2px) 0 0/22px 22px;
  border: 1px solid var(--line);
  padding: 24px 18px 42px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .78), 0 24px 50px rgba(23, 34, 28, .08);
  overflow: hidden;
}

.hanoi-board:after {
  content: "";
  position: absolute;
  left: 4%;
  right: 4%;
  bottom: 54px;
  height: 26px;
  border-radius: 50%;
  background: radial-gradient(ellipse at center, rgba(23, 34, 28, .12), transparent 68%);
  pointer-events: none;
}

.hanoi-board.complete {
  box-shadow: inset 0 0 0 2px rgba(215, 239, 114, .9), 0 26px 56px rgba(30, 89, 61, .16);
}

.tower {
  position: relative;
  min-height: 360px;
  border: 0;
  background: transparent;
  cursor: pointer;
  border-radius: 18px;
  outline: none;
  transition: background .18s ease, box-shadow .18s ease, transform .18s ease;
}

.tower:hover,
.tower.selected {
  background: rgba(255, 255, 255, .5);
  box-shadow: inset 0 0 0 1px rgba(30, 89, 61, .08);
}

.tower.hint {
  box-shadow: inset 0 0 0 2px rgba(30, 89, 61, .34), 0 12px 24px rgba(30, 89, 61, .08);
  background: rgba(215, 239, 114, .2);
}

.tower-stick {
  position: absolute;
  left: 50%;
  bottom: 34px;
  width: 6px;
  height: 285px;
  border-radius: 999px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, #b2bbb7, #73817c);
  box-shadow: 0 8px 20px rgba(23, 34, 28, .12);
}

.tower-base {
  position: absolute;
  left: 8%;
  right: 8%;
  bottom: 28px;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(180deg, #a8b2ae, #74837c);
  box-shadow: 0 8px 14px rgba(23, 34, 28, .14);
}

.tower-label {
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  color: var(--green);
  background: rgba(255, 255, 255, .72);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  font: 800 12px ui-monospace, monospace;
}

.tower-stack {
  position: absolute;
  left: 50%;
  bottom: 40px;
  width: min(90%, 240px);
  transform: translateX(-50%);
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  gap: 4px;
  pointer-events: none;
  z-index: 2;
}

.hanoi-disk {
  height: 25px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: rgba(21, 32, 25, .84);
  font: 800 11px ui-monospace, monospace;
  border: 1px solid rgba(23, 34, 28, .16);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .54), 0 6px 13px rgba(23, 34, 28, .15);
  transition: transform .18s ease, filter .18s ease;
}

.tower.selected .hanoi-disk:last-child {
  transform: translateY(-8px);
  filter: brightness(1.05);
}

.hanoi-status {
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(135deg, #fffdf8, #f2f3e9);
  color: var(--green);
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.6;
  box-shadow: 0 10px 28px rgba(23, 34, 28, .05);
}

.hanoi-rules {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 12px;
}

.hanoi-rules span {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, .58);
  color: var(--muted);
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.5;
}

.hanoi-rules b {
  color: var(--green);
  font: 800 10px ui-monospace, monospace;
  margin-right: 7px;
}

.hanoi-settings {
  padding: 24px;
  align-self: start;
  position: sticky;
  top: 94px;
}

.hanoi-field {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
  margin: 18px 0;
}

.hanoi-field b {
  color: var(--green);
}

.hanoi-field select,
.hanoi-field input[type="range"] {
  width: 100%;
}

.hanoi-field select {
  border: 1px solid var(--line);
  background: #faf9f4;
  border-radius: 11px;
  padding: 11px 12px;
  outline: none;
}

.hanoi-field input[type="range"] {
  accent-color: var(--green);
}

.hanoi-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 20px 0;
}

.hanoi-stats div {
  border: 1px solid var(--line);
  background: linear-gradient(135deg, #f2f3e9, #fffdf8);
  border-radius: 14px;
  padding: 14px;
}

.hanoi-stats strong {
  display: block;
  color: var(--green);
  font: 600 26px Georgia, serif;
}

.hanoi-stats span {
  color: var(--muted);
  font-size: 11px;
}

.hanoi-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.hanoi-actions .primary-btn {
  width: 100%;
  grid-column: 1 / -1;
}

.hanoi-actions .ghost-btn {
  width: 100%;
  text-align: center;
  border-radius: 10px;
  background: rgba(255, 255, 255, .55);
}

.hanoi-actions .danger {
  color: var(--red);
}

.hanoi-note {
  margin-top: 18px;
  padding: 15px;
  border-radius: 14px;
  background: linear-gradient(135deg, #fff4cf, #fffaf0);
  color: #725d19;
  font-size: 12px;
  line-height: 1.65;
  border: 1px solid rgba(114, 93, 25, .12);
}

.hanoi-note p {
  margin: 6px 0 0;
}

@media (max-width: 980px) {
  .hanoi-main {
    margin-left: 20px;
    margin-right: 20px;
  }

  .hanoi-hero-card {
    grid-template-columns: 1fr;
    padding: 26px;
  }

  .hanoi-hero-visual {
    min-height: 170px;
  }

  .mini-tower {
    height: 120px;
  }

  .hanoi-shell {
    grid-template-columns: 1fr;
  }

  .hanoi-settings {
    position: static;
  }

  .hanoi-board-top {
    align-items: start;
    flex-direction: column;
  }

  .hanoi-progress-wrap {
    width: 100%;
    min-width: 0;
    text-align: left;
  }
}

@media (max-width: 680px) {
  .hanoi-hero-card {
    padding: 22px;
    border-radius: 18px;
  }

  .hanoi-hero-copy h1 {
    font-size: 40px;
    letter-spacing: -1px;
  }

  .hanoi-hero-copy p {
    font-size: 14px;
  }

  .hanoi-hero-visual {
    display: none;
  }

  .hanoi-board {
    gap: 6px;
    padding-left: 6px;
    padding-right: 6px;
  }

  .hanoi-board-panel {
    padding: 14px;
  }

  .hanoi-disk {
    height: 21px;
    font-size: 10px;
  }

  .hanoi-rules {
    grid-template-columns: 1fr;
  }

  .hanoi-actions {
    grid-template-columns: 1fr;
  }
}