/* ============================================================
   基础样式：reset / 排印 / 按钮 / 面板 / 弹层 / toast
   ============================================================ */
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow-x: clip; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  color: var(--fg);
  background: var(--ink-900);
  line-height: 1.6;
  overflow: hidden;
}
#app { height: 100%; position: relative; }
#fx-layer, #toast-layer { position: fixed; inset: 0; pointer-events: none; z-index: 90; }
#toast-layer { z-index: 120; }

::selection { background: color-mix(in oklab, var(--gold-500) 40%, transparent); }
button { font-family: inherit; cursor: pointer; }
:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: var(--radius-sm); }

h1, h2, h3, .display { font-family: var(--font-display); font-weight: 400; letter-spacing: .04em; }
small, .dim { color: var(--fg-dim); }

/* ---------- 按钮（8 态完备） ---------- */
.btn {
  --btn-bg: linear-gradient(180deg, color-mix(in oklab, var(--ink-600) 90%, black), var(--ink-700));
  position: relative;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 10px 22px;
  font-size: var(--text-md); font-family: var(--font-body); font-weight: 600;
  color: var(--paper-50); letter-spacing: .12em; text-indent: .12em;
  background: var(--btn-bg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1), inset 0 1px 0 rgb(255 255 255 / .06);
  transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast), background var(--dur);
  user-select: none;
}
.btn:hover { background: linear-gradient(180deg, color-mix(in oklab, var(--gold-600) 30%, var(--ink-600)), var(--ink-700)); box-shadow: var(--shadow-gold); transform: translateY(-1px); }
.btn:active, .btn.is-active { transform: translateY(1px) scale(.99); box-shadow: var(--shadow-1); }
.btn:focus-visible { box-shadow: var(--focus-ring), var(--shadow-1); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: .45; cursor: not-allowed; transform: none; box-shadow: none; }
.btn.is-loading { color: transparent; pointer-events: none; }
.btn.is-loading::after {
  content: ''; position: absolute; inset: 0; margin: auto; width: 18px; height: 18px;
  border-radius: 50%; border: 2px solid var(--gold-400); border-top-color: transparent;
  animation: spin .8s linear infinite;
}
.btn.is-error { border-color: var(--danger); color: var(--paper-100); }
.btn.is-success { border-color: var(--ok); }
@keyframes spin { to { transform: rotate(360deg); } }

.btn.primary {
  background: linear-gradient(180deg, var(--cinnabar-400), var(--cinnabar-600));
  border-color: color-mix(in oklab, var(--gold-400) 60%, transparent);
  font-family: var(--font-display); font-size: var(--text-lg);
}
.btn.primary:hover { background: linear-gradient(180deg, color-mix(in oklab, var(--gold-400) 22%, var(--cinnabar-400)), var(--cinnabar-600)); }
.btn.gold {
  background: linear-gradient(180deg, var(--gold-400), var(--gold-600));
  color: #241a06; border-color: color-mix(in oklab, var(--paper-50) 50%, transparent);
  font-family: var(--font-display); font-size: var(--text-lg);
}
.btn.ghost { background: transparent; border-color: var(--line); }
.btn.small { min-height: 34px; padding: 4px 14px; font-size: var(--text-sm); }

/* ---------- 面板 ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
  backdrop-filter: blur(6px);
}
.panel-title {
  font-family: var(--font-display); font-size: var(--text-xl); color: var(--gold-300);
  padding: var(--space-md) var(--space-lg) var(--space-xs);
  letter-spacing: .18em;
}

/* ---------- 模态 ---------- */
.modal-mask {
  position: fixed; inset: 0; z-index: 100;
  background: rgb(4 8 14 / .66); backdrop-filter: blur(4px);
  display: grid; place-items: center;
  animation: fadeIn var(--dur) var(--ease-out);
}
.modal {
  width: min(680px, calc(100vw - 32px)); max-height: min(82vh, 720px);
  display: flex; flex-direction: column;
  background: linear-gradient(180deg, var(--ink-700), var(--ink-800));
  border: 1px solid var(--line-strong); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
  animation: popIn var(--dur-slow) var(--ease-out);
}
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: var(--space-md) var(--space-lg) var(--space-xs); border-bottom: 1px solid var(--line); }
.modal-head h3 { font-size: var(--text-xl); color: var(--gold-300); letter-spacing: .2em; }
.modal-body { padding: var(--space-md) var(--space-lg); overflow: auto; }
.modal-foot { display: flex; gap: var(--space-sm); justify-content: flex-end; padding: var(--space-sm) var(--space-lg) var(--space-md); border-top: 1px solid var(--line); }
@keyframes fadeIn { from { opacity: 0; } }
@keyframes popIn { from { opacity: 0; transform: translateY(14px) scale(.97); } }

/* ---------- toast ---------- */
.toast {
  position: absolute; left: 50%; top: 18%; transform: translateX(-50%);
  padding: 10px 20px; border-radius: var(--radius-md);
  background: color-mix(in oklab, var(--ink-800) 92%, black);
  border: 1px solid var(--line-strong); color: var(--paper-50);
  font-size: var(--text-md); letter-spacing: .06em;
  box-shadow: var(--shadow-2);
  animation: toastIn 2.4s var(--ease-out) forwards;
  white-space: nowrap;
}
.toast.warn { border-color: var(--cinnabar-400); color: #ffd9d0; }
@keyframes toastIn {
  0% { opacity: 0; transform: translate(-50%, -8px); }
  10% { opacity: 1; transform: translate(-50%, 0); }
  82% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, -6px); }
}

/* ---------- 滚动条 ---------- */
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-thumb { background: var(--ink-600); border-radius: 4px; }
*::-webkit-scrollbar-thumb:hover { background: var(--ink-600); }
*::-webkit-scrollbar-track { background: transparent; }

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}