/* 亮色变量 */
:root {
  --md-primary: #0061a4;
  --md-on-primary: #ffffff;
  --md-primary-container: #d1e4ff;
  --md-on-primary-container: #001d36;
  --md-secondary: #535f70;
  --md-on-secondary: #ffffff;
  --md-secondary-container: #d7e3f7;
  --md-on-secondary-container: #101c2b;
  --md-tertiary: #6b5778;
  --md-error: #ba1a1a;
  --md-on-error: #ffffff;
  --md-error-container: #ffdad6;
  --md-on-error-container: #410002;

  --md-background: #fdfcff;
  --md-on-background: #1a1c1e;
  --md-surface: #fdfcff;
  --md-surface-dim: #d8dae0;
  --md-surface-bright: #fdfcff;
  --md-surface-container-lowest: #ffffff;
  --md-surface-container-low: #f4f6fa;
  --md-surface-container: #eef0f4;
  --md-surface-container-high: #e9ebee;
  --md-surface-container-highest: #e3e5e9;
  --md-on-surface: #1a1c1e;
  --md-on-surface-variant: #42474e;
  --md-outline: #72777f;
  --md-outline-variant: #c2c7cf;

  --md-scrim: #000000;
  --md-shadow-color: rgba(0, 0, 0, 0.15);

  /* 圆角 */
  --md-shape-xs: 4px;
  --md-shape-sm: 8px;
  --md-shape-md: 12px;
  --md-shape-lg: 16px;
  --md-shape-xl: 28px;

  /* 过渡 */
  --md-easing: cubic-bezier(0.2, 0, 0, 1);
  --md-duration: 0.2s;
}

/* 暗色变量 */
@media (prefers-color-scheme: dark) {
  :root {
    --md-primary: #9ecaff;
    --md-on-primary: #003258;
    --md-primary-container: #004a77;
    --md-on-primary-container: #d1e4ff;
    --md-secondary: #bbc7db;
    --md-on-secondary: #253140;
    --md-secondary-container: #3b4857;
    --md-on-secondary-container: #d7e3f7;
    --md-tertiary: #d7c0e4;
    --md-error: #ffb4ab;
    --md-on-error: #690005;
    --md-error-container: #93000a;
    --md-on-error-container: #ffdad6;

    --md-background: #0e1419;
    --md-on-background: #e2e2e6;
    --md-surface: #0e1419;
    --md-surface-dim: #0e1419;
    --md-surface-bright: #343a40;
    --md-surface-container-lowest: #090f13;
    --md-surface-container-low: #161c22;
    --md-surface-container: #1b2127;
    --md-surface-container-high: #252b31;
    --md-surface-container-highest: #30363c;
    --md-on-surface: #e2e2e6;
    --md-on-surface-variant: #c2c7cf;
    --md-outline: #8b9199;
    --md-outline-variant: #42474e;
  }
}

/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
}

html {
  background: var(--md-background);
}

body {
  font-family: "Roboto", "Noto Sans SC", system-ui, -apple-system, "Segoe UI",
    sans-serif;
  background: var(--md-background);
  color: var(--md-on-background);
  line-height: 1.5;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* 应用栏 */
.appbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--md-surface-container);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  box-shadow: 0 1px 0 var(--md-outline-variant);
}

.appbar-title {
  font-size: 1.125rem;
  font-weight: 500;
  flex: 1;
}

/* 图标按钮 */
.icon-btn {
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  border-radius: 50%;
  color: var(--md-on-surface-variant);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background var(--md-duration) var(--md-easing);
  flex-shrink: 0;
}

.icon-btn:hover {
  background: var(--md-surface-container-highest);
}

.icon-btn:active {
  background: var(--md-surface-container-high);
}

.icon-btn svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* 主区域 */
.main {
  flex: 1;
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: 8px 16px 64px;
}

/* 文本输入框 */
.text-field {
  position: relative;
  margin-bottom: 16px;
}

.text-field input {
  width: 100%;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-xs);
  background: var(--md-surface-container-highest);
  color: var(--md-on-surface);
  font-size: 1rem;
  padding: 16px;
  outline: none;
  transition: border-color var(--md-duration) var(--md-easing);
  font-family: inherit;
}

.text-field input:hover {
  border-color: var(--md-on-surface);
}

.text-field input:focus {
  border: 2px solid var(--md-primary);
  padding: 15px;
}

.text-field label {
  position: absolute;
  top: -8px;
  left: 12px;
  font-size: 0.75rem;
  background: var(--md-background);
  padding: 0 4px;
  color: var(--md-on-surface-variant);
  pointer-events: none;
  transition: color var(--md-duration) var(--md-easing);
}

.text-field input:focus + label {
  color: var(--md-primary);
}

/* 按钮 */
.btn {
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.1px;
  border: none;
  border-radius: var(--md-shape-xl);
  padding: 10px 24px;
  min-height: 40px;
  cursor: pointer;
  transition: box-shadow var(--md-duration) var(--md-easing),
    background var(--md-duration) var(--md-easing);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.38;
  pointer-events: none;
}

.btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* 填充按钮（主操作） */
.btn-filled {
  background: var(--md-primary);
  color: var(--md-on-primary);
}

.btn-filled:not(:disabled):hover {
  box-shadow: 0 1px 3px 1px var(--md-shadow-color),
    0 1px 2px 0 var(--md-shadow-color);
}

/* 浅色按钮（次要操作） */
.btn-tonal {
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
}

/* 文本按钮 */
.btn-text {
  background: transparent;
  color: var(--md-primary);
}

.btn-text:not(:disabled):hover {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
}

/* 分段按钮 */
.segmented {
  display: inline-flex;
  border: 1px solid var(--md-outline);
  border-radius: var(--md-shape-xl);
  overflow: hidden;
  height: 40px;
  background: var(--md-surface);
}

.segmented button {
  font-family: inherit;
  font-size: 0.875rem;
  border: none;
  background: transparent;
  color: var(--md-on-surface);
  padding: 0 16px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background var(--md-duration) var(--md-easing);
  border-left: 1px solid var(--md-outline);
}

.segmented button:first-child {
  border-left: none;
}

.segmented button:hover {
  background: var(--md-surface-container-high);
}

.segmented button.selected {
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
}

.segmented button svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
  opacity: 0;
  transition: opacity var(--md-duration) var(--md-easing);
}

.segmented button.selected svg {
  opacity: 1;
}

/* 行布局 */
.row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.row-center {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.spacer {
  flex: 1;
}

/* Chip */
.chip {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 12px;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-sm);
  font-size: 0.8125rem;
  background: var(--md-surface-container-low);
  color: var(--md-on-surface-variant);
}

/* 区块标题 */
.section-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--md-on-surface-variant);
  margin: 20px 0 12px;
}

/* 使用指南 */
.howto {
  margin: 16px 0;
  padding: 12px 16px;
  background: var(--md-surface-container-low);
  border-radius: var(--md-shape-md);
}

.howto-step {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 0.875rem;
  color: var(--md-on-surface-variant);
  line-height: 1.5;
}

.howto-step:last-child {
  margin-bottom: 0;
}

.howto-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  font-size: 0.75rem;
  font-weight: 600;
  flex-shrink: 0;
}

/* 推荐网格 */
.pack-grid {
  columns: 180px;
  column-gap: 12px;
}

.pack-card {
  break-inside: avoid;
  margin-bottom: 12px;
  background: var(--md-surface-container-low);
  border-radius: var(--md-shape-md);
  overflow: hidden;
  cursor: pointer;
  transition: background var(--md-duration) var(--md-easing),
    box-shadow var(--md-duration) var(--md-easing);
}

.pack-card:hover {
  background: var(--md-surface-container);
  box-shadow: 0 1px 3px var(--md-shadow-color);
}

.pack-card-cover {
  height: 120px;
  background: var(--md-surface-container);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pack-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.pack-card-name {
  padding: 8px 12px 0;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--md-on-surface);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pack-card-info {
  padding-bottom: 10px;
}

.pack-card-desc {
  padding: 2px 12px 0;
  font-size: 0.75rem;
  color: var(--md-on-surface-variant);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.pack-card-tags {
  padding: 6px 12px 0;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

/* 模式切换 */
.mode-switch {
  width: 100%;
  height: 44px;
  margin-bottom: 4px;
}
.mode-switch button {
  flex: 1;
  justify-content: center;
}

/* 搜索结果 */
.search-note {
  font-size: 0.8125rem;
  color: var(--md-on-surface-variant);
  margin-bottom: 12px;
}

.search-results {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.search-empty {
  text-align: center;
  color: var(--md-on-surface-variant);
  padding: 32px 0;
  font-size: 0.9375rem;
}

.search-item {
  display: flex;
  gap: 12px;
  padding: 12px;
  background: var(--md-surface-container-low);
  border-radius: var(--md-shape-md);
  cursor: pointer;
  transition: background var(--md-duration) var(--md-easing);
}

.search-item:hover {
  background: var(--md-surface-container);
}

.search-item:active {
  background: var(--md-surface-container-high);
}

.search-item-cover {
  width: 56px;
  height: 56px;
  border-radius: var(--md-shape-sm);
  background: var(--md-surface-container-high);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.search-item-cover img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.cover-placeholder {
  font-size: 0.875rem;
  color: var(--md-on-surface-variant);
  opacity: 0.5;
}

.search-item-body {
  flex: 1;
  min-width: 0;
}

.search-item-main {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 2px;
}

.search-item-name {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--md-on-surface);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-item-id {
  font-size: 0.75rem;
  color: var(--md-on-surface-variant);
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

.search-item-desc {
  font-size: 0.8125rem;
  color: var(--md-on-surface-variant);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin: 0;
}

.search-item-tags {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.chip-sm {
  height: 24px;
  padding: 0 8px;
  font-size: 0.6875rem;
  border-radius: 6px;
}

/* 类型标签 */
.type-label {
  font-size: 0.875rem;
  color: var(--md-on-surface-variant);
  margin-right: 4px;
}

/* 信息卡片 */
.card {
  background: var(--md-surface-container-low);
  border-radius: var(--md-shape-md);
  padding: 20px;
  margin: 16px 0;
}

.info-head {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 4px;
}

.info-title {
  font-size: 1.5rem;
  font-weight: 400;
  flex: 1;
  line-height: 1.3;
}

.info-desc {
  color: var(--md-on-surface-variant);
  margin: 8px 0 16px;
  font-size: 0.9375rem;
}

.info-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}

/* 表情网格 */
.emoji-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(84px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.emoji-cell {
  background: var(--md-surface-container);
  border-radius: var(--md-shape-md);
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.emoji-cell img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.emoji-cell .label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.5));
  color: #fff;
  font-size: 0.6875rem;
  text-align: center;
  padding: 12px 2px 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.emoji-cell .placeholder {
  color: var(--md-on-surface-variant);
  font-size: 0.75rem;
}

/* 进度条 */
.progress {
  height: 4px;
  background: var(--md-surface-container-highest);
  border-radius: 2px;
  overflow: hidden;
  margin: 16px 0;
  display: none;
}

.progress.active {
  display: block;
}

.progress-bar {
  height: 100%;
  background: var(--md-primary);
  border-radius: 2px;
  width: 0;
  transition: width 0.3s var(--md-easing);
}

.progress-label {
  font-size: 0.8125rem;
  color: var(--md-on-surface-variant);
  text-align: center;
  display: none;
  margin-bottom: 8px;
}

.progress-label.active {
  display: block;
}

/* Snackbar */
.snackbar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  opacity: 0;
  visibility: hidden;
  background: var(--md-on-surface);
  color: var(--md-surface);
  padding: 14px 16px;
  border-radius: var(--md-shape-xs);
  font-size: 0.875rem;
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.2), 0 9px 12px rgba(0, 0, 0, 0.15);
  z-index: 1000;
  max-width: 90vw;
  transition: transform var(--md-duration) var(--md-easing),
    opacity var(--md-duration) var(--md-easing),
    visibility var(--md-duration);
}

.snackbar.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* 设置对话框 */
.scrim {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--md-duration) var(--md-easing);
}

.scrim.show {
  opacity: 1;
  pointer-events: auto;
}

.dialog {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  background: var(--md-surface-container-high);
  border-radius: var(--md-shape-xl);
  padding: 24px;
  width: min(420px, 92vw);
  z-index: 201;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--md-duration) var(--md-easing),
    transform var(--md-duration) var(--md-easing);
}

.dialog.show {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, -50%) scale(1);
}

.dialog-title {
  font-size: 1.25rem;
  font-weight: 400;
  margin-bottom: 16px;
}

.dialog-body {
  color: var(--md-on-surface-variant);
  font-size: 0.875rem;
  margin-bottom: 24px;
  line-height: 1.6;
}

.dialog-body input {
  width: 100%;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-xs);
  background: var(--md-surface-container-highest);
  color: var(--md-on-surface);
  font-size: 0.875rem;
  padding: 12px;
  outline: none;
  font-family: inherit;
  margin-top: 8px;
}

.dialog-body input:focus {
  border: 2px solid var(--md-primary);
  padding: 11px;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* 空状态 */
.placeholder-hero {
  text-align: center;
  padding: 48px 16px;
  color: var(--md-on-surface-variant);
}

.placeholder-hero svg {
  width: 64px;
  height: 64px;
  fill: var(--md-outline);
  margin-bottom: 16px;
  opacity: 0.6;
}

.placeholder-hero h2 {
  font-weight: 400;
  font-size: 1.25rem;
  margin-bottom: 8px;
  color: var(--md-on-surface);
}

.placeholder-hero p {
  font-size: 0.875rem;
  max-width: 420px;
  margin: 0 auto;
  line-height: 1.6;
}

/* 页脚 */
.footer {
  text-align: center;
  padding: 16px;
  padding-bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  font-size: 0.6875rem;
  color: var(--md-on-surface-variant);
}

.footer a {
  color: var(--md-primary);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

.disclaimer {
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.5;
}

.credits {
  margin-top: 4px;
}

/* 工具类 */
.hidden {
  display: none !important;
}

/* 响应式 */
@media (max-width: 600px) {
  .appbar {
    padding: 6px 10px;
  }
  .appbar-title {
    font-size: 1rem;
  }
  .main {
    padding: 6px 10px 48px;
  }
  .mode-switch {
    height: 40px;
  }
  .mode-switch button {
    font-size: 0.8125rem;
    padding: 0 10px;
  }
  .mode-switch button svg {
    width: 16px;
    height: 16px;
  }
  .text-field input {
    padding: 14px;
    font-size: 0.9375rem;
  }
  .text-field input:focus {
    padding: 13px;
  }
  .pack-grid {
    columns: 140px;
    column-gap: 8px;
  }
  .pack-card-cover {
    height: 90px;
  }
  .pack-card-name {
    font-size: 0.8125rem;
    padding: 6px 10px 0;
  }
  .pack-card-desc {
    padding: 2px 10px 0;
    font-size: 0.6875rem;
  }
  .pack-card-tags {
    padding: 4px 10px 0;
  }
  .pack-card-info {
    padding-bottom: 8px;
  }
  .search-item {
    padding: 10px;
    gap: 10px;
  }
  .search-item-cover {
    width: 48px;
    height: 48px;
  }
  .search-item-name {
    font-size: 0.875rem;
  }
  .search-item-desc {
    font-size: 0.75rem;
  }
  .search-item-tags {
    margin-top: 4px;
  }
  .info-title {
    font-size: 1.125rem;
  }
  .emoji-grid {
    grid-template-columns: repeat(auto-fill, minmax(64px, 1fr));
    gap: 6px;
  }
  .emoji-cell .label {
    font-size: 0.625rem;
    padding: 8px 2px 3px;
  }
  .row-center {
    gap: 8px;
  }
  .type-label {
    font-size: 0.8125rem;
  }
  .segmented button {
    font-size: 0.8125rem;
    padding: 0 12px;
  }
  .btn {
    padding: 8px 16px;
    font-size: 0.8125rem;
    min-height: 36px;
  }
  .card {
    padding: 14px;
  }
  .footer {
    padding: 12px;
    font-size: 0.625rem;
  }
}