/* ==================== 变量 ==================== */
:root{
  --fs-scale: 1;

  --fs-nick:    calc(11px * var(--fs-scale));
  --fs-uid:     calc(9px  * var(--fs-scale));
  --fs-date:    calc(11px * var(--fs-scale));
  --fs-year:    calc(9px  * var(--fs-scale));
  --fs-content: calc(13px * var(--fs-scale));
  --fs-time:    calc(11px * var(--fs-scale));
  --fs-ui:      calc(16px * var(--fs-scale));
  --fs-ui-sm:   calc(14px * var(--fs-scale));
  --fs-body:    calc(15px * var(--fs-scale));

  --app-font: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --bg-page:        #efedee;
  --bg-card:        #fff;
  --bg-info:        #fafafa;
  --bg-content:     #fff;
  --bg-divider:     #f5f5f5;
  --bg-avatar:      #ccc;
  --bg-input:       #fafafa;
  --bg-input-focus: #fff;
  --bg-btn:         #444;
  --bg-btn-2:       #eee;
  --bg-track:       #ddd;
  --bg-thumb:       #666;
  --bg-tabbar:      #fff;
  --bg-tab-active:  #f0f0f0;
  --bg-topbar:      rgba(239,237,238,.85);

  --tx-primary:    #000;
  --tx-nick:       #000;
  --tx-uid:        #aaa;
  --tx-date:       #a4a4a4;
  --tx-year:       #c2c2c2;
  --tx-content:    #000;
  --tx-ph:         #ccc;
  --tx-clock:      #d3d3d3;
  --tx-sec:        #999;
  --tx-label:      #666;
  --tx-input:      #333;
  --tx-btn:        #fff;
  --tx-btn-2:      #555;
  --tx-hint:       #aaa;
  --tx-tab:        #777;
  --tx-tab-active: #000;
  --tx-link:       #0a84ff;
  --tx-danger:     #ff3b30;

  --caret: #000;

  --bd-input:       #ddd;
  --bd-input-focus: #aaa;
  --bd-line:        #eee;

  --sh-card:   0 1px 3px rgba(0,0,0,.02);

  --radius-card: 0px;
  --radius-btn:  10px;
}

html.dark{
  --bg-page:        #111;
  --bg-card:        #1c1c1e;
  --bg-info:        #232325;
  --bg-content:     #1c1c1e;
  --bg-divider:     #2a2a2c;
  --bg-avatar:      #333;
  --bg-input:       #2a2a2c;
  --bg-input-focus: #2f2f31;
  --bg-btn:         #f0f0f0;
  --bg-btn-2:       #2f2f31;
  --bg-track:       #3a3a3c;
  --bg-thumb:       #aaa;
  --bg-tabbar:      #1c1c1e;
  --bg-tab-active:  #2f2f31;
  --bg-topbar:      rgba(17,17,17,.85);

  --tx-primary:    #fff;
  --tx-nick:       #fff;
  --tx-uid:        #888;
  --tx-date:       #888;
  --tx-year:       #666;
  --tx-content:    #eaeaea;
  --tx-ph:         #555;
  --tx-clock:      #666;
  --tx-sec:        #888;
  --tx-label:      #aaa;
  --tx-input:      #eee;
  --tx-btn:        #111;
  --tx-btn-2:      #ddd;
  --tx-hint:       #777;
  --tx-tab:        #888;
  --tx-tab-active: #fff;
  --tx-link:       #0a84ff;
  --tx-danger:     #ff453a;

  --caret: #fff;

  --bd-input:       #333;
  --bd-input-focus: #666;
  --bd-line:        #2a2a2c;

  --sh-card:   0 1px 3px rgba(0,0,0,.3);
}

/* ==================== 基础 ==================== */
*{ box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html{ background: var(--bg-page); -webkit-text-size-adjust: 100%; }

body{
  margin: 0;
  min-height: 100vh;
  background: var(--bg-page);
  font-family: var(--app-font);
  color: var(--tx-primary);
  padding-bottom: 76px;
  overflow-x: hidden;
}

/* ==================== 视图切换 ==================== */
.view{ display: none; max-width: 400px; margin: 0 auto; }
.view.active{ display: block; }

/* ==================== 顶栏 ==================== */
.topbar{
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: calc(12px + env(safe-area-inset-top, 0px)) 6px 10px;
  background: var(--bg-topbar);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
}
.topbar-side{
  display: flex;
  align-items: center;
  justify-content: flex-start;
  min-width: 0;
}
.topbar-side.right{ justify-content: flex-end; }
.topbar-title{
  margin: 0;
  font-size: var(--fs-ui);
  font-weight: 600;
  color: var(--tx-primary);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 60vw;
}

.icon-btn{
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--tx-primary);
  cursor: pointer;
  flex: 0 0 auto;
}
.icon-btn:active{ background: var(--bg-input); }
.icon-btn.small{ width: 28px; height: 28px; }

.text-btn{
  border: 0;
  background: transparent;
  font-family: inherit;
  font-size: var(--fs-ui-sm);
  color: var(--tx-label);
  padding: 8px 6px;
  cursor: pointer;
}
.text-btn.primary{ color: var(--tx-link); font-weight: 600; }

/* ==================== 搜索 ==================== */
.search-wrap{ padding: 0 6px 10px; }
.search-input{
  width: 100%;
  padding: 10px 12px;
  font-family: inherit;
  font-size: var(--fs-ui-sm);
  color: var(--tx-input);
  background: var(--bg-input);
  border: 1px solid var(--bd-input);
  border-radius: var(--radius-btn);
  outline: none;
  -webkit-appearance: none;
}
.search-input:focus{
  border-color: var(--bd-input-focus);
  background: var(--bg-input-focus);
}

/* ==================== 列表 ==================== */
.list{
  padding: 4px 6px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

/* ==================== 卡片 ==================== */
.card{
  width: 100%;
  background: var(--bg-card);
  border-radius: var(--radius-card);
  box-shadow: var(--sh-card);
  overflow: hidden;
  cursor: pointer;
}

.card .info{
  background: var(--bg-info);
  padding: 8px 10px 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.card .info-left{
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  flex: 1 1 auto;
}
.card .avatar{
  width: calc(25px * var(--fs-scale));
  height: calc(25px * var(--fs-scale));
  border-radius: 50%;
  object-fit: cover;
  display: block;
  flex: 0 0 auto;
  background: var(--bg-avatar);
}
.card .names{
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  line-height: 1.15;
}
.card .nick{
  font-size: var(--fs-nick);
  color: var(--tx-nick);
  font-weight: 800;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.05em;
}
.card .uid{
  font-size: var(--fs-uid);
  color: var(--tx-uid);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.03em;
}
.card .info-right{
  flex: 0 0 auto;
  align-self: flex-start;
  text-align: right;
  line-height: 1.2;
  padding-top: 2px;
  margin-top: -1px;
}
.card .date{
  font-size: var(--fs-date);
  color: var(--tx-date);
  white-space: nowrap;
}
.card .year{
  font-size: var(--fs-year);
  color: var(--tx-year);
  white-space: nowrap;
}

.card .divider{
  height: 2px;
  background: var(--bg-divider);
}

.card .body{
  background: var(--bg-content);
  padding: 15px 12px 12px;
}

.card .content{
  font-size: var(--fs-content);
  color: var(--tx-content);
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
  display: -webkit-box;
  -webkit-line-clamp: 5;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card.expanded .content{
  display: block;
  -webkit-line-clamp: unset;
  overflow: visible;
}

.expand-btn{
  display: inline-block;
  margin-top: 2px;
  font-size: var(--fs-content);
  color: var(--tx-link);
  background: transparent;
  border: 0;
  padding: 0;
  font-family: inherit;
  cursor: pointer;
  letter-spacing: 0.05em;
}

.card .clock{
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 10px;
  font-size: var(--fs-time);
  user-select: none;
  -webkit-user-select: none;
}
.card .clock-icon{
  width: 1.1em;
  height: 1.1em;
  flex: 0 0 auto;
  display: block;
  background-color: var(--tx-clock);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='2.5' stroke-linecap='round'%3E%3Ccircle cx='12' cy='12' r='9'/%3E%3Cpath d='M12 7.5V12l3 2'/%3E%3C/svg%3E") no-repeat center / contain;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='2.5' stroke-linecap='round'%3E%3Ccircle cx='12' cy='12' r='9'/%3E%3Cpath d='M12 7.5V12l3 2'/%3E%3C/svg%3E") no-repeat center / contain;
}
.card .clock-time{
  font-size: 1em;
  color: var(--tx-clock);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: .3px;
}

/* ==================== 详情页 ==================== */
.detail-body{
  padding: 4px 6px 0;
}
.detail-body .card{ cursor: default; }

.detail-actions{
  display: flex;
  gap: 10px;
  padding: 18px 0 10px;
}
.detail-actions .btn{ flex: 1 1 auto; text-align: center; }

/* ==================== 个人主页 ==================== */
.profile-card{
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 16px 16px;
}
.profile-avatar{
  width: calc(64px * var(--fs-scale));
  height: calc(64px * var(--fs-scale));
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-avatar);
  cursor: default;
  flex: 0 0 auto;
  -webkit-user-drag: none;
  user-select: none;
}
.profile-info{
  flex: 1 1 auto;
  min-width: 0;
}
.profile-nick{
  font-size: calc(18px * var(--fs-scale));
  font-weight: 700;
  color: var(--tx-nick);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
}
.profile-uid{
  font-size: calc(12px * var(--fs-scale));
  color: var(--tx-uid);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.4;
  margin-top: 2px;
}

.profile-bio{
  padding: 0 16px 12px;
  font-size: var(--fs-ui-sm);
  color: var(--tx-label);
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}

.section-bar{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px 6px;
}
.section-label{
  font-size: var(--fs-ui-sm);
  font-weight: 600;
  color: var(--tx-sec);
  letter-spacing: 0.5px;
}

/* ==================== 空状态 ==================== */
.empty-tip{
  text-align: center;
  font-size: var(--fs-ui-sm);
  color: var(--tx-hint);
  padding: 40px 20px;
}

/* ==================== 设置页 ==================== */
.settings-body{ padding-bottom: 20px; }

.setting-section{
  padding: 16px 16px 18px;
  border-bottom: 1px solid var(--bd-line);
}
.setting-title{
  font-size: var(--fs-ui-sm);
  font-weight: 600;
  color: var(--tx-sec);
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.setting-row-btn{
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
  border: 0;
  background: transparent;
  font-family: inherit;
  font-size: var(--fs-ui);
  color: var(--tx-primary);
  cursor: pointer;
  text-align: left;
}
.setting-row-btn .chev{
  font-size: 22px;
  line-height: 1;
  color: var(--tx-hint);
  margin-left: 8px;
}

.switch{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  font-size: var(--fs-ui);
  color: var(--tx-primary);
  padding: 2px 0;
}
.switch input{ position: absolute; opacity: 0; pointer-events: none; }
.switch .track{
  width: 44px; height: 24px;
  border-radius: 12px;
  background: var(--bg-track);
  position: relative;
  transition: background .2s;
  flex: 0 0 auto;
}
.switch .track::after{
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 2px rgba(0,0,0,.2);
  transition: transform .2s;
}
.switch input:checked + .track{ background: #34c759; }
.switch input:checked + .track::after{ transform: translateX(20px); }

#fsRange{
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  border-radius: 2px;
  background: var(--bg-track);
  outline: none;
  display: block;
}
#fsRange::-webkit-slider-thumb{
  -webkit-appearance: none;
  appearance: none;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--bg-thumb);
  cursor: pointer;
}
#fsRange::-moz-range-thumb{
  width: 20px; height: 20px;
  border: 0;
  border-radius: 50%;
  background: var(--bg-thumb);
  cursor: pointer;
}
.range-labels{
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  font-size: var(--fs-ui-sm);
  color: var(--tx-hint);
}

.field{ margin-bottom: 10px; }
.field input[type="text"]{
  width: 100%;
  padding: 10px 12px;
  font-size: var(--fs-ui-sm);
  font-family: inherit;
  color: var(--tx-input);
  background: var(--bg-input);
  border: 1px solid var(--bd-input);
  border-radius: var(--radius-btn);
  outline: none;
  -webkit-appearance: none;
}
.field input[type="text"]:focus{
  border-color: var(--bd-input-focus);
  background: var(--bg-input-focus);
}

.field textarea{
  width: 100%;
  padding: 10px 12px;
  font-size: var(--fs-ui-sm);
  font-family: inherit;
  color: var(--tx-input);
  background: var(--bg-input);
  border: 1px solid var(--bd-input);
  border-radius: var(--radius-btn);
  outline: none;
  resize: vertical;
  min-height: 80px;
  line-height: 1.55;
  -webkit-appearance: none;
}
.field textarea:focus{
  border-color: var(--bd-input-focus);
  background: var(--bg-input-focus);
}

textarea#customCssInput{
  width: 100%;
  padding: 10px 12px;
  font-size: calc(12px * var(--fs-scale));
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
  color: var(--tx-input);
  background: var(--bg-input);
  border: 1px solid var(--bd-input);
  border-radius: var(--radius-btn);
  outline: none;
  resize: vertical;
  min-height: 130px;
  line-height: 1.55;
  -webkit-appearance: none;
}
textarea#customCssInput:focus{
  border-color: var(--bd-input-focus);
  background: var(--bg-input-focus);
}

.btn-row{
  display: flex;
  gap: 10px;
}
.btn{
  display: inline-block;
  padding: 10px 18px;
  font-size: var(--fs-ui-sm);
  font-family: inherit;
  border: 0;
  border-radius: var(--radius-btn);
  background: var(--bg-btn);
  color: var(--tx-btn);
  cursor: pointer;
}
.btn:active{ opacity: .8; }
.btn.secondary{ background: var(--bg-btn-2); color: var(--tx-btn-2); }
.btn.danger{ background: transparent; color: var(--tx-danger); border: 1px solid var(--tx-danger); }
.btn-row .btn{ flex: 1 1 auto; }

.hint{
  font-size: calc(11px * var(--fs-scale));
  color: var(--tx-hint);
  margin-top: 8px;
  line-height: 1.6;
}

/* ==================== 编辑资料页 ==================== */
.edit-profile-body{
  padding-bottom: 20px;
}

.edit-avatar-wrap{
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 22px 16px 18px;
}
.edit-avatar{
  width: calc(80px * var(--fs-scale));
  height: calc(80px * var(--fs-scale));
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-avatar);
  -webkit-user-drag: none;
  user-select: none;
}
.edit-avatar-btn{
  padding: 8px 16px;
  font-family: inherit;
  font-size: var(--fs-ui-sm);
  color: var(--tx-link);
  background: transparent;
  border: 0;
  cursor: pointer;
}
.edit-avatar-btn:active{ opacity: .7; }

/* ==================== 写日记 ==================== */
.compose-body{
  padding: 0 16px 20px;
}
#composeContent{
  width: 100%;
  min-height: 45vh;
  padding: 10px 0;
  font-size: var(--fs-body);
  font-family: inherit;
  color: var(--tx-content);
  background: transparent;
  border: 0;
  outline: none;
  resize: none;
  line-height: 1.7;
  -webkit-appearance: none;
}
#composeContent::placeholder{ color: var(--tx-ph); }

.compose-time-row{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--bd-line);
  font-size: var(--fs-ui-sm);
  color: var(--tx-label);
}
.compose-time-row input[type="datetime-local"]{
  font-family: inherit;
  font-size: var(--fs-ui-sm);
  color: var(--tx-input);
  background: var(--bg-input);
  border: 1px solid var(--bd-input);
  border-radius: 8px;
  padding: 6px 10px;
  outline: none;
  -webkit-appearance: none;
}

/* ==================== 底部 tabbar ==================== */
.tabbar{
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 0;
  width: 100%;
  max-width: 400px;
  z-index: 50;
  display: flex;
  align-items: center;
  padding: 6px 0 max(6px, env(safe-area-inset-bottom));
  background: var(--bg-tabbar);
  border-top: 1px solid var(--bd-line);
}

.tab{
  flex: 1 1 0;
  border: 0;
  background: transparent;
  font-family: inherit;
  font-size: var(--fs-ui-sm);
  color: var(--tx-tab);
  padding: 10px 0;
  cursor: pointer;
  text-align: center;
  white-space: nowrap;
  transition: color .2s;
}
.tab.active{
  color: var(--tx-tab-active);
  font-weight: 600;
}

.tab-plus{
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 8px;
  background: #333;
  color: #fff;
  cursor: pointer;
  flex: 0 0 auto;
  margin: 0 6px;
  transition: transform .15s;
}
.tab-plus:active{ transform: scale(.92); }
.tab-plus svg{ width: 22px; height: 22px; display: block; }

/* ==================== 顶栏昵称+箭头按钮 ==================== */
.topbar-profile-btn{
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  border: 0;
  background: transparent;
  font-family: inherit;
  color: var(--tx-primary);
  cursor: pointer;
  max-width: 60vw;
  min-width: 0;
}
.topbar-profile-btn .topbar-title{
  max-width: none;
  margin: 0;
}
.topbar-profile-btn .topbar-arrow{
  flex: 0 0 auto;
  color: var(--tx-sec);
  display: block;
}
.topbar-profile-btn:active{ opacity: .6; }

/* ==================== 编辑资料页（间距收紧） ==================== */
.edit-profile-body{
  padding-bottom: 20px;
}
.edit-profile-body .setting-section{
  padding: 6px 16px 8px;
}

.edit-avatar-wrap{
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 12px 16px 8px;
}
.edit-avatar{
  width: calc(80px * var(--fs-scale));
  height: calc(80px * var(--fs-scale));
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-avatar);
  cursor: pointer;
  -webkit-user-drag: none;
  user-select: none;
}
.edit-avatar:active{ opacity: .85; }

/* ==================== 头像选择浮层 ==================== */
.sheet-overlay{
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0,0,0,.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s;
}
.sheet-overlay.open{ opacity: 1; pointer-events: auto; }

.sheet{
  position: fixed;
  left: 50%;
  transform: translate(-50%, 100%);
  bottom: 0;
  z-index: 210;
  width: 100%;
  max-width: 400px;
  padding: 8px 8px max(8px, env(safe-area-inset-bottom));
  background: var(--bg-card);
  border-radius: 14px 14px 0 0;
  transition: transform .25s cubic-bezier(.4,0,.2,1);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.sheet.open{ transform: translate(-50%, 0); }

.sheet-btn{
  padding: 14px 16px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  font-family: inherit;
  font-size: var(--fs-ui);
  color: var(--tx-primary);
  text-align: center;
  cursor: pointer;
}
.sheet-btn:active{ background: var(--bg-input); }
.sheet-btn.sheet-cancel{
  color: var(--tx-sec);
  margin-top: 4px;
}

html.dark .sheet{
  background: #1c1c1e;
  border-top: 1px solid #2a2a2c;
}