/* TokenSail — Base: reset, typography, layout shell, atmosphere */

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

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

/* hidden 全局属性硬保障: 防止作者样式 (如 .field{display:flex}) 覆盖 [hidden],
   否则带 hidden 的 .field 元素 (如登录页 #twofaField) 会对所有用户可见。 */
[hidden] { display: none !important; }

body {
  font-family: var(--font-ui);
  font-size: var(--fs-base);
  line-height: 1.55;
  color: var(--text);
  background: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ---- Deep-sea atmosphere: mesh gradients + grain ---- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 600px at 12% -5%, rgba(79,209,197,0.10), transparent 60%),
    radial-gradient(800px 700px at 92% 8%, rgba(122,162,247,0.08), transparent 55%),
    radial-gradient(1000px 800px at 70% 110%, rgba(167,139,250,0.06), transparent 60%),
    var(--ink);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.035;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: var(--fw-semi); line-height: 1.15; letter-spacing: -0.01em; }

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }
ul { list-style: none; }

.mono { font-family: var(--font-mono); font-feature-settings: "tnum" 1; }
.dim { color: var(--text-dim); }
.faint { color: var(--text-faint); }
.accent { color: var(--accent); }
.warn { color: var(--warn); }
.danger { color: var(--danger); }
.nowrap { white-space: nowrap; }
.right { text-align: right; }
.center { text-align: center; }

/* ---- App shell ---- */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid var(--line-soft);
  background: linear-gradient(180deg, color-mix(in srgb, var(--panel) 92%, transparent), color-mix(in srgb, var(--ink) 92%, transparent));
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  padding: var(--s-5) var(--s-4);
  z-index: 30;
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-2) var(--s-2) var(--s-6);
}
.brand-mark {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  box-shadow: var(--glow-accent);
  flex-shrink: 0;
}
.brand-mark svg { width: 20px; height: 20px; }
.brand-name { font-family: var(--font-display); font-weight: var(--fw-bold); font-size: var(--fs-lg); letter-spacing: -0.02em; }
.brand-name b { color: var(--accent); font-weight: var(--fw-bold); }

.nav-group-label {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-mute);
  padding: var(--s-4) var(--s-3) var(--s-2);
}
.nav-item {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: 10px var(--s-3);
  border-radius: var(--r-sm);
  color: var(--text-dim);
  font-weight: var(--fw-med);
  font-size: var(--fs-md);
  transition: background var(--dur-fast), color var(--dur-fast);
  position: relative;
}
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; opacity: 0.85; }
.nav-item:hover { background: var(--panel-2); color: var(--text); }
.nav-item.active { color: var(--text); background: var(--panel-hi); }
.nav-item.active::before {
  content: "";
  position: absolute; left: 0; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 20px;
  border-radius: 0 3px 3px 0;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}
.sidebar-foot { margin-top: auto; padding-top: var(--s-4); }
.balance-mini {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: var(--s-3) var(--s-4);
  background: var(--panel-2);
}
.balance-mini .lbl { font-size: var(--fs-xs); color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.08em; }
.balance-mini .val { font-family: var(--font-mono); font-size: var(--fs-lg); color: var(--accent); font-weight: var(--fw-semi); }

/* ---- Main column ---- */
.main { display: flex; flex-direction: column; min-width: 0; }

.topbar {
  position: sticky;
  top: 0;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: var(--s-4);
  padding: 0 var(--s-7);
  border-bottom: 1px solid var(--line-soft);
  background: color-mix(in srgb, var(--ink) 70%, transparent);
  backdrop-filter: blur(14px);
  z-index: 20;
}
.topbar .crumbs { font-size: var(--fs-sm); color: var(--text-dim); }
.topbar .crumbs b { color: var(--text); font-weight: var(--fw-semi); }
.topbar-spacer { flex: 1; }
.menu-toggle { display: none; }

.content { padding: var(--s-7); max-width: var(--content-max); width: 100%; margin: 0 auto; flex: 1; }

.page-head { margin-bottom: var(--s-6); }
.page-head h1 { font-size: var(--fs-2xl); margin-bottom: var(--s-2); }
.page-head p { color: var(--text-dim); max-width: 60ch; }
.page-head-row { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--s-4); flex-wrap: wrap; }

/* ---- Grid primitives ---- */
.grid { display: grid; gap: var(--s-5); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }

/* ---- Lang switch ---- */
.lang-switch { display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: var(--r-sm); overflow: hidden; width: fit-content; }
.lang-switch button { padding: 6px 14px; font-size: var(--fs-sm); font-weight: var(--fw-med); color: var(--text-dim); border-bottom: 1px solid var(--line); text-align: left; }
.lang-switch button:last-child { border-bottom: none; }
.lang-switch button.active { background: var(--accent); color: var(--ink); }

/* ---- 主题切换按钮（亮 ↔ 暗） ---- */
.theme-toggle {
  width: 34px; height: 34px; flex-shrink: 0;
  display: grid; place-items: center;
  border: 1px solid var(--line); border-radius: 50%;
  color: var(--text-dim); background: transparent;
  transition: color var(--dur-fast), border-color var(--dur-fast), background var(--dur-fast), transform var(--dur-fast);
}
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); background: var(--panel-hi); }
.theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.theme-toggle:active { transform: scale(0.9); }
@media (prefers-reduced-motion: no-preference) {
  @keyframes ts-theme-pop {
    0% { transform: rotate(-75deg) scale(0.55); opacity: 0.3; }
    100% { transform: rotate(0deg) scale(1); opacity: 1; }
  }
  .theme-toggle svg.pop { animation: ts-theme-pop var(--dur) var(--ease-out); }
}

/* ---- 语言下拉（i18n Language Switcher：文字徽章 + 点击展开；地缘政治中立，不用国旗） ---- */
.lang-dd { position: relative; display: inline-flex; }
.lang-dd-trigger {
  display: inline-flex; align-items: center; gap: 7px;
  height: 34px; padding: 0 9px;
  border: 1px solid var(--line); border-radius: var(--r-pill);
  color: var(--text-dim); background: transparent; cursor: pointer;
  transition: color var(--dur-fast), border-color var(--dur-fast), background var(--dur-fast), box-shadow var(--dur-fast);
}
.lang-dd-trigger:hover { color: var(--accent); border-color: var(--accent); background: var(--panel-hi); }
.lang-dd-trigger:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
/* 文字徽章（短码圆形 badge，替代国旗——语言≠国家，规避领土争议风险） */
.lang-dd-badge {
  display: inline-flex; align-items: center; justify-content: center;
  flex-shrink: 0; width: 20px; height: 20px; border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  color: var(--accent);
  font-size: 9px; font-weight: var(--fw-bold);
  line-height: 1; letter-spacing: 0.02em;
  transition: transform var(--dur-fast) var(--ease-out);
}
.lang-dd-trigger:hover .lang-dd-badge { transform: scale(1.12); }
.lang-dd-chev { display: inline-flex; width: 12px; height: 12px; opacity: 0.6; transition: transform var(--dur) var(--ease-out); }
.lang-dd-chev svg { width: 100%; height: 100%; }
.lang-dd.open .lang-dd-chev { transform: rotate(180deg); }
.lang-dd.open .lang-dd-trigger {
  color: var(--accent); border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* 面板：右上角锚点弹性展开 */
.lang-dd-panel {
  position: absolute; right: 0; top: calc(100% + 8px); z-index: 60;
  min-width: 224px; padding: 6px;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--r-md);
  box-shadow: var(--shadow-md);
  opacity: 0; visibility: hidden;
  transform: translateY(-6px) scale(0.97); transform-origin: top right;
  transition: opacity var(--dur-fast) ease, transform var(--dur-fast) var(--ease-out),
              visibility 0s linear var(--dur-fast);
}
.lang-dd.open .lang-dd-panel {
  opacity: 1; visibility: visible; transform: translateY(0) scale(1);
  transition: opacity var(--dur-fast) ease, transform var(--dur) var(--ease-out), visibility 0s;
}
.lang-dd-head {
  display: flex; align-items: center; gap: 6px;
  margin-bottom: 5px; padding: 7px 10px 8px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 10px; font-weight: var(--fw-bold);
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-mute);
}
.lang-dd-head svg { width: 12px; height: 12px; }
.lang-dd-item {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 8px 10px; border-radius: var(--r-sm); text-align: left;
  color: var(--text-dim); cursor: pointer;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.lang-dd-item + .lang-dd-item { margin-top: 2px; }
.lang-dd-item:hover, .lang-dd-item:focus-visible { background: var(--panel-hi); color: var(--text); outline: none; }
.lang-dd-item .lang-dd-badge {
  width: 24px; height: 24px; font-size: 10px; font-weight: var(--fw-semi);
  font-family: var(--font-mono);
  border-color: var(--line); background: var(--panel-2); color: var(--text-dim);
}
.lang-dd-label { flex: 1; font-size: var(--fs-sm); font-weight: var(--fw-med); }
.lang-dd-short { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; color: var(--text-mute); }
.lang-dd-check { display: inline-flex; width: 14px; height: 14px; color: var(--accent); opacity: 0; transform: scale(0.4); transition: opacity var(--dur-fast), transform var(--dur) var(--ease-out); }
.lang-dd-check svg { width: 100%; height: 100%; stroke-width: 2.4; }
.lang-dd-item.active { background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--text); }
.lang-dd-item.active .lang-dd-check { opacity: 1; transform: scale(1); }

/* 列表项级联浮现（22ms/项） */
@media (prefers-reduced-motion: no-preference) {
  .lang-dd.open .lang-dd-item { animation: ts-lang-item-in 0.26s var(--ease-out) both; animation-delay: calc(var(--i, 0) * 22ms); }
  @keyframes ts-lang-item-in { from { opacity: 0; transform: translateX(6px); } to { opacity: 1; transform: none; } }
}
/* 移动端：面板不溢出屏幕 */
@media (max-width: 480px) {
  .lang-dd-panel { min-width: 196px; right: -8px; }
}

/* ---- Avatar / user ---- */
.user-chip { display: flex; align-items: center; gap: var(--s-3); padding: 5px 6px 5px 12px; border: 1px solid var(--line); border-radius: var(--r-pill); }
.user-chip .ava { width: 28px; height: 28px; border-radius: 50%; background: linear-gradient(135deg, var(--violet), var(--info)); display: grid; place-items: center; font-size: var(--fs-sm); font-weight: var(--fw-bold); color: var(--ink); }
.user-chip .uname { font-size: var(--fs-sm); font-weight: var(--fw-med); }

/* ---- Responsive ---- */
@media (max-width: 1080px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .col-span-3 { grid-column: span 2; }
}
@media (max-width: 860px) {
  :root { --sidebar-w: 0px; }
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; left: 0; top: 0; width: 264px;
    transform: translateX(-100%);
    transition: transform var(--dur) var(--ease);
  }
  .sidebar.open { transform: translateX(0); }
  .menu-toggle { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid var(--line); border-radius: var(--r-sm); }
  .scrim { position: fixed; inset: 0; background: rgba(0,0,0,0.55); opacity: 0; pointer-events: none; transition: opacity var(--dur); z-index: 25; }
  .scrim.show { opacity: 1; pointer-events: auto; }
  .content { padding: var(--s-5); }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .col-span-2, .col-span-3 { grid-column: span 1; }
  .topbar { padding: 0 var(--s-5); }
}

/* ---- A11y ---- */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* Skip Link — 无障碍跳过导航 */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 9999;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: var(--accent, #4FD1C5);
  border-radius: 6px;
  text-decoration: none;
  opacity: 0;
  pointer-events: none;
}
.skip-link:focus {
  top: 16px;
  opacity: 1;
  pointer-events: auto;
  outline: 2px solid var(--accent, #4FD1C5);
  outline-offset: 2px;
}