/**
 * 高雅简约 UI · 平滑过渡 + 全局面板动效
 */

body {
  background: var(--bg);
}

.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--line);
}

.sidebar-head {
  padding: 18px 16px 14px;
  border-bottom: 1px solid var(--line);
}
.sidebar-head::before,
.sidebar-head::after {
  content: none !important;
  display: none !important;
}
.sidebar-head h1 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.theme-toggle-track {
  border-radius: 999px;
  width: 56px;
  height: 28px;
  background: var(--surface-2);
  border-color: var(--line);
  transition:
    background var(--motion) var(--ease-soft),
    border-color var(--motion) var(--ease-soft);
}
.theme-toggle-knob {
  border-radius: 50%;
  width: 22px;
  height: 22px;
  top: 2px;
  left: 2px;
  border: 0;
  box-shadow: 0 1px 4px var(--shadow);
  background: var(--surface);
  transition:
    transform 0.5s var(--ease-out),
    background-color var(--motion) var(--ease-soft),
    box-shadow var(--motion) var(--ease-soft);
}
.theme-toggle-icon {
  transition:
    opacity 0.45s var(--ease-soft),
    color 0.45s var(--ease-soft),
    transform 0.45s var(--ease-out);
}
[data-theme="dark"] .theme-toggle-knob {
  transform: translateX(28px);
}
[data-theme="light"] .theme-toggle-sun {
  color: #c98520;
}
[data-theme="dark"] .theme-toggle-moon {
  color: var(--brand-sakura-soft);
}

.nav {
  padding: 8px 0 10px;
}
.nav-btn {
  width: 100%;
  margin: 0;
  height: 36px;
  padding: 0 16px;
  border-left: 2px solid transparent;
  border-radius: 0;
  letter-spacing: 0.01em;
  font-size: 13px;
  font-weight: 500;
  clip-path: none !important;
  box-shadow: none !important;
  transition:
    color var(--motion) var(--ease-soft),
    background var(--motion) var(--ease-soft),
    border-color var(--motion) var(--ease-soft),
    transform var(--motion-fast) var(--ease-out);
}
.nav-btn::before {
  content: none !important;
  display: none !important;
}
.nav-btn:hover {
  color: var(--text);
  background: var(--surface-2);
}
.nav-btn.active {
  color: var(--text);
  background: var(--accent-bg);
  border-left-color: var(--accent);
  font-weight: 600;
}
.nav-btn:active {
  transform: scale(0.985);
}

.nav-group-body {
  transition: grid-template-rows var(--motion) var(--ease-out), opacity var(--motion) var(--ease-soft);
}
.nav-group-chevron {
  transition: transform var(--motion) var(--ease-out);
}

.nav-scrollbar {
  flex-basis: 8px;
  width: 8px;
  background: color-mix(in srgb, var(--muted) 12%, transparent);
}
.nav-scrollbar-thumb {
  border-radius: 999px;
  background: color-mix(in srgb, var(--muted) 48%, transparent);
  border: 0;
  left: 1px;
  right: 1px;
  transition: background var(--motion-fast) var(--ease-soft);
}
.nav-scrollbar-thumb:active {
  background: color-mix(in srgb, var(--muted) 62%, transparent);
}

.sidebar-foot {
  border-top: 1px solid var(--line);
  background: transparent;
}

.app-topbar {
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  min-height: 52px;
}
.app-topbar::after {
  content: none !important;
  display: none !important;
}

.topbar-song-chip {
  border-radius: var(--radius);
  clip-path: none !important;
  background: var(--surface-2);
  transition:
    border-color var(--motion) var(--ease-soft),
    background var(--motion) var(--ease-soft),
    transform var(--motion-fast) var(--ease-out),
    box-shadow var(--motion) var(--ease-soft);
}
.topbar-song-chip:hover,
.topbar-song-chip.is-open {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
}

.topbar-song-detail {
  transition:
    opacity var(--motion) var(--ease-out),
    transform var(--motion) var(--ease-out),
    visibility var(--motion) !important;
  transform: translateY(-8px) scale(0.98);
}
.topbar-song-detail.is-open {
  transform: none;
}

.session-user-trigger {
  transition:
    background var(--motion) var(--ease-soft),
    border-color var(--motion) var(--ease-soft),
    transform var(--motion-fast) var(--ease-out);
}
.session-user-menu {
  transition:
    opacity var(--motion) var(--ease-out),
    transform var(--motion) var(--ease-out),
    visibility var(--motion) !important;
  transform: translateY(-8px) scale(0.98);
}
.session-user-row.is-open .session-user-menu {
  transform: none;
}
.session-user-menu-item {
  transition:
    background var(--motion-fast) var(--ease-soft),
    color var(--motion-fast) var(--ease-soft),
    transform var(--motion-fast) var(--ease-out);
}

.main::before {
  content: none !important;
  display: none !important;
}

.panel-head {
  margin-bottom: 16px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.panel-head::before {
  content: none !important;
  display: none !important;
}
.panel-head h2 {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0;
}

.panel.active,
.panel-chat.active {
  animation: elegant-panel-in 280ms var(--ease-soft) both;
}
/* 切页仅面板淡入，子块不再错峰上弹 */
.panel.active.is-content-ready > *:not(.panel-readonly-banner) {
  animation: none;
}
.panel-chat.active > *,
.panel-chat.active.is-content-ready > * {
  animation: none;
}

/* 数据区文字/列表更替时柔和过渡，避免生硬闪现 */
.status-line,
.info-grid,
.hint,
.muted,
.ov-billboard,
.ov-presence-list,
.ov-live-feed,
.ov-hitokoto-text,
.table-wrap,
#ovNowPlaying,
#ovLiveRoom,
#ovObs,
#ovDanmaku,
#ovAnnounce,
#ovLyricsWall,
#ovSelectedAccounts {
  transition:
    opacity 220ms var(--ease-soft),
    color 220ms var(--ease-soft);
}

@keyframes elegant-panel-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes elegant-rise {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes elegant-pop {
  from {
    opacity: 0;
    transform: translate3d(0, 10px, 0) scale(0.97);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
@keyframes elegant-toast-in {
  from {
    opacity: 0;
    transform: translate3d(0, -10px, 0);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.card {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 14px 16px;
  box-shadow: none;
  clip-path: none !important;
  transition:
    border-color var(--motion) var(--ease-soft),
    box-shadow var(--motion) var(--ease-soft),
    background-color var(--motion) var(--ease-soft),
    transform var(--motion-fast) var(--ease-out);
}
.card::before,
.card::after {
  content: none !important;
  display: none !important;
}
.card:hover {
  border-color: color-mix(in srgb, var(--accent) 22%, var(--line));
  box-shadow: 0 10px 28px var(--shadow);
}
html.la-wall-on .card:hover {
  border-color: var(--line);
  box-shadow: none !important;
}
.card h3 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
  color: var(--text);
}

.btn,
.bar-btn,
.auth-tab,
.ov-quote-tab,
.theme-seg button {
  transition:
    background var(--motion) var(--ease-soft),
    border-color var(--motion) var(--ease-soft),
    color var(--motion) var(--ease-soft),
    transform var(--motion-fast) var(--ease-out),
    box-shadow var(--motion) var(--ease-soft),
    opacity var(--motion-fast) var(--ease-soft) !important;
}
.btn {
  border-radius: var(--radius);
  letter-spacing: 0;
  font-weight: 600;
  clip-path: none !important;
  box-shadow: none;
}
.btn:hover {
  box-shadow: none;
}
.btn:active,
.bar-btn:active,
.auth-tab:active,
.ov-quote-tab:active {
  transform: scale(0.97);
}
.btn.ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}
.btn.ghost:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
  background: var(--accent-bg);
  color: var(--text);
}

input:not([type="checkbox"]):not([type="radio"]):not([type="range"]),
select,
textarea {
  border-radius: var(--radius) !important;
  transition:
    border-color var(--motion) var(--ease-soft),
    box-shadow var(--motion) var(--ease-soft),
    background-color var(--motion) var(--ease-soft) !important;
}
input:not([type="checkbox"]):not([type="radio"]):not([type="range"]):focus,
select:focus,
textarea:focus {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line)) !important;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 14%, transparent);
  outline: none;
}

/* 弹层 / 对话框 */
.auth-gate,
.confirm-modal,
.disconnect-modal,
.user-profile-modal,
.chat-image-lightbox,
.sc-disclaimer-modal,
.chat-disclaimer-modal,
.collab-notice-modal {
  transition:
    opacity var(--motion) var(--ease-soft),
    visibility var(--motion),
    backdrop-filter var(--motion) var(--ease-soft) !important;
}
.auth-gate {
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px);
}
.auth-gate-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: 0 16px 48px var(--shadow);
  overflow: hidden;
}
.auth-gate-card::before {
  content: none !important;
  display: none !important;
}
.auth-gate-card h1 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0;
}
.auth-gate.is-open .auth-gate-card,
.confirm-modal.is-open .confirm-dialog,
.disconnect-modal.is-open .disconnect-dialog,
.user-profile-modal.is-open .user-profile-dialog,
.sc-disclaimer-modal.is-open .confirm-dialog,
.sc-disclaimer-modal.is-open .sc-disclaimer-dialog,
.chat-disclaimer-modal.is-open .chat-disclaimer-dialog,
.collab-notice-modal.is-open .collab-notice-card {
  animation: elegant-pop var(--motion) var(--ease-out) both;
}

.mobile-bar {
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.mobile-bar-title {
  letter-spacing: 0;
  font-weight: 600;
}

.version-update-toast:not(.hidden),
.pm-toast:not(.hidden),
.presence-login-toast:not(.hidden) {
  animation: elegant-toast-in var(--motion) var(--ease-out) both;
  border-radius: var(--radius);
}

.sidebar-backdrop {
  transition:
    opacity var(--motion) var(--ease-soft),
    visibility var(--motion) !important;
}

/* 滑块开关更跟手 */
input[type="checkbox"] {
  transition:
    background-color var(--motion) var(--ease-out),
    border-color var(--motion) var(--ease-out),
    box-shadow var(--motion-fast) var(--ease-soft) !important;
}
input[type="checkbox"]::before,
input[type="checkbox"]::after {
  transition: transform var(--motion) var(--ease-out) !important;
}

.health {
  transition:
    background-color var(--motion) var(--ease-soft),
    color var(--motion) var(--ease-soft),
    border-color var(--motion) var(--ease-soft);
}

.ov-quote-tab,
.auth-tab {
  transition:
    background var(--motion) var(--ease-soft),
    color var(--motion) var(--ease-soft),
    border-color var(--motion) var(--ease-soft),
    transform var(--motion-fast) var(--ease-out) !important;
}

@media (max-width: 768px) {
  .sidebar {
    transition: transform var(--motion-slow) var(--ease-out) !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .panel.active,
  .panel-chat.active,
  .panel.active.is-content-ready > *,
  .auth-gate.is-open .auth-gate-card,
  .confirm-modal.is-open .confirm-dialog,
  .version-update-toast:not(.hidden),
  .pm-toast:not(.hidden),
  .presence-login-toast:not(.hidden) {
    animation: none !important;
  }
}