:root {
  color: #6d5b4e;
  background: #f5efe6;
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC",
    "Microsoft YaHei", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background: #f5efe6;
  color: #6d5b4e;
}

button,
textarea,
input {
  font: inherit;
}

button {
  border: 1px solid #d7cab9;
  border-radius: 7px;
  background: #fffdf9;
  color: #6d5b4e;
  cursor: pointer;
}

button:hover {
  border-color: #bda98f;
  background: #fff8ee;
}

.app-shell {
  width: min(1480px, calc(100vw - 40px));
  margin: 0 auto;
  padding: 28px 0 40px;
}

.app-header {
  margin-bottom: 18px;
}

.eyebrow,
.status {
  color: #8d7b6d;
}

.eyebrow {
  margin: 0 0 3px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: 42px;
  line-height: 1;
  letter-spacing: 0;
}

.page {
  display: block;
}

.is-hidden {
  display: none;
}

.panel,
.preview-panel {
  border: 1px solid #d7cab9;
  background: #fffdf9;
  box-shadow: 0 2px 14px rgba(109, 91, 78, 0.08);
}

.panel {
  border-radius: 8px;
  padding: 16px;
}

.input-panel {
  width: min(760px, 100%);
}

.input-label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 700;
}

textarea {
  width: 100%;
  min-height: 240px;
  resize: vertical;
  border: 1px solid #d7cab9;
  border-radius: 7px;
  padding: 12px;
  background: #ffffff;
  color: #4f4238;
  line-height: 1.55;
}

textarea:focus,
input:focus,
button:focus-visible {
  outline: 2px solid #a7b8b4;
  outline-offset: 2px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.button-row button {
  min-height: 34px;
  padding: 7px 10px;
  font-size: 13px;
  font-weight: 650;
}

.primary-button {
  background: #6d5b4e;
  border-color: #6d5b4e;
  color: #fffdf9;
}

.primary-button:hover {
  background: #594a40;
  border-color: #594a40;
}

.palette-strip {
  display: grid;
  grid-template-columns: repeat(8, minmax(78px, 1fr));
  gap: 6px;
  margin-bottom: 12px;
  overflow-x: auto;
}

.palette-swatch {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 5px 6px;
  border: 1px solid #d7cab9;
  border-radius: 0;
  color: #6d5b4e;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.05;
  text-align: center;
}

.status {
  min-height: 20px;
  margin: 10px 0 0;
  font-size: 13px;
}

.bottom-actions {
  display: flex;
  justify-content: center;
  margin-top: 16px;
}

.bottom-actions button {
  min-height: 36px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 650;
}

.preview-surface {
  min-height: 74vh;
  padding: 28px;
  overflow: auto;
  background: #ffffff;
}

.tile-board {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  align-content: flex-start;
  gap: var(--tile-gap);
  min-width: min-content;
}

.tile-board br {
  flex-basis: 100%;
  width: 0;
  height: 0;
}

.tile-stack {
  display: inline-flex;
  flex-direction: column;
  align-items: stretch;
  gap: 6px;
}

.tile {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: var(--tile-size);
  height: var(--tile-size);
  padding: var(--tile-padding);
  border-radius: var(--tile-radius);
  border: 1px solid #c7b7a2;
  color: #6d5b4e;
  cursor: pointer;
  line-height: 1;
}

.tile:hover {
  filter: saturate(1.07);
}

.tile:focus-visible {
  outline: 2px solid #a7b8b4;
  outline-offset: 2px;
}

.hanzi {
  color: #1f1a17;
  font-size: var(--hanzi-size);
  font-weight: 600;
  line-height: 0.96;
  letter-spacing: 0;
}

.pinyin {
  min-height: calc(var(--pinyin-size) + 8px);
  margin-top: calc(var(--tile-padding) * 0.38);
  padding: 3px 5px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: #1f1a17;
  font-size: var(--pinyin-size);
  font-weight: 550;
  line-height: 1;
}

.pinyin.has-alternates {
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 4px;
}

.pinyin:hover {
  background: rgba(255, 255, 255, 0.58);
}

.copy-tile {
  min-height: 28px;
  padding: 4px 8px;
  border-color: #d7cab9;
  background: #fffdf9;
  color: #6d5b4e;
  font-size: 12px;
  font-weight: 700;
}

@media (max-width: 980px) {
  .app-shell {
    width: min(100vw - 24px, 760px);
    padding-top: 18px;
  }

  .preview-panel {
    min-height: 54vh;
  }

  .preview-surface {
    min-height: 54vh;
    padding: 18px;
  }

}