/* 内容聚合 · 阅读端 v2
   设计原则：阅读优先 —— 层次分明、来源可辨识、双主题可手动切换
   结构：桌面左栏 + 时间线；移动单列 + 底部切页 */

/* ============ 设计令牌 ============ */

:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --panel-2: #f8f9fb;
  --panel-3: #eef0f4;
  --line: #e3e6eb;
  --line-soft: #ecEEf3;
  --fg: #191c21;
  --fg-2: #555c68;
  --fg-3: #8a92a0;
  --accent: #4b5fd6;
  --accent-strong: #3a4cc0;
  --accent-soft: #eceffc;
  --star: #de8f1f;
  --danger: #d5453a;
  --ok: #1f9d61;
  --shadow-sm: 0 1px 2px rgba(18, 24, 40, .05);
  --shadow: 0 2px 4px rgba(18, 24, 40, .05), 0 14px 34px rgba(18, 24, 40, .09);
  --radius: 16px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
          "Noto Sans CJK SC", sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #101216;
    --panel: #1a1d24;
    --panel-2: #15181e;
    --panel-3: #22262f;
    --line: #272c36;
    --line-soft: #1f242d;
    --fg: #e9ebf0;
    --fg-2: #a6adbb;
    --fg-3: #737c8b;
    --accent: #8294ff;
    --accent-strong: #9aa9ff;
    --accent-soft: #232a44;
    --star: #eab04d;
    --danger: #ff8073;
    --ok: #46c98a;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .35);
    --shadow: 0 2px 4px rgba(0, 0, 0, .35), 0 16px 40px rgba(0, 0, 0, .45);
    color-scheme: dark;
  }
}

/* 手动切换：data-theme 覆盖系统偏好 */
:root[data-theme="dark"] {
  --bg: #101216;
  --panel: #1a1d24;
  --panel-2: #15181e;
  --panel-3: #22262f;
  --line: #272c36;
  --line-soft: #1f242d;
  --fg: #e9ebf0;
  --fg-2: #a6adbb;
  --fg-3: #737c8b;
  --accent: #8294ff;
  --accent-strong: #9aa9ff;
  --accent-soft: #232a44;
  --star: #eab04d;
  --danger: #ff8073;
  --ok: #46c98a;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .35);
  --shadow: 0 2px 4px rgba(0, 0, 0, .35), 0 16px 40px rgba(0, 0, 0, .45);
  color-scheme: dark;
}

:root[data-theme="light"] { color-scheme: light; }

* { box-sizing: border-box; }

/* hidden 属性永远生效，防止任何 display 规则将其覆盖 */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "tnum" 0;
}

body { overscroll-behavior-y: none; transition: background .25s ease, color .25s ease; }

button, input { font-family: inherit; font-size: inherit; color: inherit; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}

/* 滚动条 */
* { scrollbar-width: thin; scrollbar-color: var(--line) transparent; }
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-thumb { background: var(--line); border-radius: 8px; }
*::-webkit-scrollbar-track { background: transparent; }

/* ============ 骨架 ============ */

.shell {
  display: flex;
  min-height: 100vh;
  align-items: stretch;
}

/* ============ 侧栏（桌面） ============ */

.sidebar {
  flex: 0 0 252px;
  width: 252px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px 14px 16px;
  border-right: 1px solid var(--line);
  background: var(--panel-2);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 2px 8px 18px;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  flex: none;
  background:
    radial-gradient(120% 120% at 20% 15%, color-mix(in srgb, var(--accent) 55%, #9fd8ff), var(--accent) 58%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .22), 0 3px 10px color-mix(in srgb, var(--accent) 35%, transparent);
}

.brand-text { display: flex; flex-direction: column; line-height: 1.3; min-width: 0; }
.brand-text strong { font-size: 15px; font-weight: 700; letter-spacing: .3px; }
.brand-text em {
  font-style: normal;
  font-size: 11px;
  color: var(--fg-3);
  white-space: nowrap;
  overflow: hidden;
  text-shadow: none;
  text-overflow: ellipsis;
}

.nav { display: flex; flex-direction: column; gap: 2px; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 11px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
  color: var(--fg-2);
  transition: background .15s, color .15s;
}

.nav-item svg { width: 17px; height: 17px; opacity: .85; }
.nav-item:hover { background: var(--panel-3); color: var(--fg); }
.nav-item.is-active { background: var(--accent-soft); color: var(--accent-strong); font-weight: 600; }
.nav-item.is-active svg { opacity: 1; }
.nav-label { font-size: 14px; flex: 1; text-align: left; }

.count {
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--fg-3);
  min-width: 20px;
  text-align: right;
}

.nav-item.is-active .count { color: var(--accent-strong); font-weight: 700; }
.nav-item .count[data-zero="1"] { visibility: hidden; }

.side-label {
  margin: 20px 11px 4px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--fg-3);
  text-transform: uppercase;
}

.sources { display: flex; flex-direction: column; gap: 1px; }

.source-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 11px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
  color: var(--fg-2);
  text-align: left;
  transition: background .15s, color .15s;
}

.source-item:hover { background: var(--panel-3); color: var(--fg); }
.source-item.is-active { background: var(--accent-soft); color: var(--accent-strong); font-weight: 600; }

.src-dot {
  width: 9px;
  height: 9px;
  border-radius: 4px;
  flex: none;
  background: hsl(var(--h, 220), 62%, 55%);
  box-shadow: 0 0 0 3px hsl(var(--h, 220), 62%, 55%, .15);
}

.source-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13.5px;
}

.side-empty { padding: 6px 11px; color: var(--fg-3); font-size: 13px; }

.side-foot { margin-top: auto; padding-top: 16px; }

.link-btn {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: transparent;
  color: var(--fg-2);
  cursor: pointer;
  font-size: 13px;
  transition: color .15s, border-color .15s;
}

.link-btn:hover { color: var(--fg); border-color: var(--fg-3); }

/* ============ 主区 ============ */

.main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line-soft);
}

.search {
  position: relative;
  flex: 1;
  max-width: 480px;
  display: flex;
  align-items: center;
}

.search svg {
  position: absolute;
  left: 13px;
  color: var(--fg-3);
  width: 17px;
  height: 17px;
  pointer-events: none;
}

.search input {
  width: 100%;
  padding: 9px 34px 9px 38px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}

.search input:focus {
  border-color: color-mix(in srgb, var(--accent) 55%, transparent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.search input::-webkit-search-cancel-button { display: none; }

.clear-btn {
  position: absolute;
  right: 6px;
  width: 24px;
  height: 24px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--fg-3);
  cursor: pointer;
  font-size: 17px;
  line-height: 1;
}

.clear-btn:hover { background: var(--panel-3); color: var(--fg); }

.topbar-spacer { flex: 1; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 37px;
  height: 37px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--panel);
  color: var(--fg-2);
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s, transform .12s;
}

.icon-btn:hover { color: var(--fg); border-color: var(--fg-3); }
.icon-btn:active { transform: scale(.94); }
.icon-btn.is-on { color: var(--accent-strong); border-color: color-mix(in srgb, var(--accent) 45%, transparent); background: var(--accent-soft); }
.icon-btn.is-on svg { fill: currentColor; }
.icon-btn.danger:hover { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 50%, transparent); }
.icon-btn.spin svg { animation: spin .8s linear infinite; }

@keyframes spin { to { transform: rotate(360deg); } }

/* 移动端来源 chips */
.chips {
  display: none;
  gap: 8px;
  padding: 12px 16px 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.chips::-webkit-scrollbar { display: none; }

.chip {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
  color: var(--fg-2);
  cursor: pointer;
  font-size: 13px;
  white-space: nowrap;
}

.chip .src-dot { width: 7px; height: 7px; border-radius: 3px; box-shadow: none; }

.chip.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

.chip.is-active .src-dot { background: rgba(255,255,255,.85); }

.statusline {
  padding: 12px 28px 0;
  font-size: 12.5px;
  color: var(--fg-3);
  min-height: 20px;
}

/* ============ 时间线 ============ */

.timeline {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 10px 28px 48px;
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
}

.day-sep {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 18px 0 2px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--fg-3);
}

.day-sep::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

/* 卡片：左侧来源色条 + meta 上移 + 标题加大 */

.card {
  position: relative;
  display: block;
  width: 100%;
  text-align: left;
  padding: 14px 17px 13px 19px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: transform .14s ease, box-shadow .18s ease, border-color .18s ease;
  overflow: hidden;
}

/* 来源色条 */
.card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 3px;
  border-radius: 3px;
  background: hsl(var(--h, 220), 62%, 55%);
  opacity: .85;
}

.card:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  border-color: color-mix(in srgb, var(--accent) 22%, var(--line));
}
.card:active { transform: translateY(0); }

.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 5px;
  font-size: 12px;
  color: var(--fg-3);
}

.src-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-weight: 600;
  color: hsl(var(--h, 220), 55%, 46%);
}

.src-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: hsl(var(--h, 220), 62%, 55%);
}

:root[data-theme="dark"] .src-badge,
.dark .src-badge { color: hsl(var(--h, 220), 75%, 72%); }

.card-time { font-variant-numeric: tabular-nums; }

.card-title {
  margin: 0;
  font-size: 16.5px;
  font-weight: 650;
  line-height: 1.45;
  letter-spacing: .2px;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.card.is-read .card-title { font-weight: 500; color: var(--fg-2); }

.card-summary {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--fg-2);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.card-foot {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  min-height: 22px;
}

.tag {
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 11.5px;
  color: var(--fg-3);
  background: var(--panel-3);
  border: 0;
}

.card-size { font-size: 11.5px; color: var(--fg-3); margin-left: auto; font-variant-numeric: tabular-nums; }

.star-btn {
  border: 0;
  background: transparent;
  color: var(--fg-3);
  cursor: pointer;
  padding: 2px;
  display: inline-flex;
  border-radius: 6px;
  transition: color .15s, transform .12s;
}

.star-btn:hover { color: var(--star); transform: scale(1.1); }
.star-btn svg { width: 16px; height: 16px; }
.star-btn.is-on { color: var(--star); }
.star-btn.is-on svg { fill: currentColor; }

/* 骨架屏 */
.skeleton {
  height: 108px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(100deg, var(--panel) 30%, var(--panel-3) 50%, var(--panel) 70%);
  background-size: 260% 100%;
  animation: shimmer 1.4s linear infinite;
}

@keyframes shimmer { from { background-position: 130% 0; } to { background-position: -30% 0; } }

/* 空态 */
.empty {
  padding: 72px 20px;
  text-align: center;
  color: var(--fg-3);
}

.empty svg {
  width: 52px;
  height: 52px;
  stroke-width: 1.2;
  color: var(--fg-3);
  opacity: .55;
  margin-bottom: 14px;
}

.empty strong { display: block; font-size: 15.5px; color: var(--fg-2); margin-bottom: 6px; font-weight: 600; }
.empty p { margin: 0; font-size: 13.5px; max-width: 320px; margin-inline: auto; }

.list-foot { display: flex; justify-content: center; padding: 10px 0 34px; }

.more-btn {
  padding: 8px 22px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
  color: var(--fg-2);
  cursor: pointer;
  font-size: 13px;
  transition: color .15s, border-color .15s;
}

.more-btn:hover { color: var(--fg); border-color: var(--fg-3); }

/* ============ 底部切页（移动） ============ */

.tabbar { display: none; }

/* ============ 阅读器 ============ */

.reader {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  animation: rise .18s ease;
}

@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.reader-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.reader-head { flex: 1; min-width: 0; display: flex; flex-direction: column; line-height: 1.35; }
.reader-head strong { font-size: 14.5px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.reader-head span { font-size: 12px; color: var(--fg-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.reader-actions { display: flex; gap: 6px; flex: none; }

.reader iframe {
  flex: 1;
  width: 100%;
  border: 0;
  background: #fff;
}

/* ============ 提示条 ============ */

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 14px);
  z-index: 60;
  padding: 9px 18px;
  border-radius: 22px;
  background: color-mix(in srgb, var(--fg) 90%, transparent);
  color: var(--bg);
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s, transform .2s;
  max-width: 82vw;
  text-align: center;
}

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

/* ============ 响应式 ============ */

@media (max-width: 900px) {
  .sidebar { display: none; }
  .chips { display: flex; }
  .statusline { padding: 10px 16px 0; }
  .timeline { padding: 8px 16px 96px; gap: 10px; }
  .topbar { padding: 12px 16px; }
  .reader-head strong { font-size: 14px; }

  .tabbar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 30;
    display: flex;
    padding: 6px 8px calc(6px + env(safe-area-inset-bottom));
    gap: 4px;
    background: color-mix(in srgb, var(--panel) 92%, transparent);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-top: 1px solid var(--line);
  }

  .tab-item {
    flex: 1;
    padding: 9px 0;
    border: 0;
    border-radius: 10px;
    background: transparent;
    color: var(--fg-3);
    cursor: pointer;
    font-size: 13px;
  }

  .tab-item.is-active { color: var(--accent-strong); background: var(--accent-soft); font-weight: 600; }
}

@media (max-width: 420px) {
  .card { padding: 13px 14px 12px 16px; }
  .card-title { font-size: 15.5px; }
  .card-size { display: none; }
}

/* ============ 登录页 ============ */

.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.auth-card {
  width: 100%;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 32px 28px 28px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.auth-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  margin-bottom: 2px;
  background: radial-gradient(120% 120% at 20% 15%, color-mix(in srgb, var(--accent) 55%, #9fd8ff), var(--accent) 58%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .22);
}
.auth-card h1 { margin: 0; font-size: 19px; font-weight: 600; letter-spacing: .2px; }
.auth-sub { margin: 0; color: var(--fg-3); font-size: 13px; }
.auth-field { display: block; }

.auth-field input {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--panel-2);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}

.auth-field input:focus {
  border-color: color-mix(in srgb, var(--accent) 55%, transparent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.auth-btn {
  padding: 11px;
  border: 0;
  border-radius: 11px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .15s;
}

.auth-btn:hover { opacity: .92; }
.auth-btn:disabled { opacity: .6; cursor: default; }

.auth-error { margin: 0; font-size: 13px; color: var(--danger); }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}