/* ==========================================================================
   BASE & GLOBAL STYLES
   ========================================================================== */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  background-color: var(--bg-app);
  color: var(--text-primary);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--bg-app);
  color: var(--text-primary);
}

/* 打开弹层时锁定背景滚动。
   注意：不使用 touch-action:none —— iOS Safari 上若类名残留，
   页面会彻底无法触摸滚动（"滑不动"bug 的帮凶之一） */
body.modal-open {
  overflow: hidden !important;
  overscroll-behavior: contain;
}

/* 屏幕亮度/护眼遮罩层：全局覆盖但不拦截任何点击 */
#screenDimLayer {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
}
#screenDimLayer .dim-black,
#screenDimLayer .dim-tint {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.2s ease;
}
#screenDimLayer .dim-black { background: #000000; }
#screenDimLayer .dim-tint { background: rgba(142, 192, 128, 0.16); }

button {
  font-family: inherit;
}

input, select {
  font-family: inherit;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

::selection {
  background-color: var(--accent-gold-subtle);
  color: var(--text-primary);
}

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

/* Form Controls */
input[type="range"] {
  accent-color: var(--accent-gold);
  cursor: pointer;
}

.select-field {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  padding-right: 26px !important;
}

.kbd-hint {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  font-size: 10px;
  font-weight: 700;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  border-radius: 4px;
  border: 1px solid var(--border-medium);
  background-color: var(--bg-surface-elevated);
  color: var(--text-muted);
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--accent-gold);
  border-top-color: transparent;
  border-radius: 9999px;
  animation: spin 0.7s linear infinite;
}

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

/* Utilities */
.line-clamp-1 {
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.scrollbar-none::-webkit-scrollbar {
  display: none;
}
.scrollbar-none {
  -ms-overflow-style: none;
  scrollbar-width: none;
}