:root {
  color-scheme: light;
  --app-bg: #f6f8fb;
  --app-bg-soft: #eef3f8;
  --app-surface: #ffffff;
  --app-surface-soft: #f8fafc;
  --app-text: #1f2937;
  --app-muted: #64748b;
  --app-faint: #94a3b8;
  --app-line: #d9e2ec;
  --app-line-strong: #b9c6d4;
  --app-primary: #3867a8;
  --app-primary-hover: #2f568c;
  --app-primary-soft: #e8f1fb;
  --app-danger: #d04437;
  --app-success: #2f7d54;
  --app-warning: #9a6a17;
  --app-on-primary: #ffffff;
  --app-overlay: rgba(15, 23, 42, 0.34);
  --app-glass: rgba(255, 255, 255, 0.9);
  --app-shadow: 0 12px 34px rgba(15, 23, 42, 0.08);
  --app-shadow-sm: 0 4px 14px rgba(15, 23, 42, 0.06);
  --radius: 8px;
  --radius-sm: 6px;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;

  --bg: var(--app-bg);
  --bg-2: var(--app-bg-soft);
  --surface: var(--app-surface);
  --surface-2: var(--app-surface-soft);
  --surface-3: var(--app-primary-soft);
  --line: var(--app-line);
  --line-strong: var(--app-line-strong);
  --text: var(--app-text);
  --muted: var(--app-muted);
  --faint: var(--app-faint);
  --red: var(--app-danger);
  --red-2: #e0584d;
  --gold: #916b22;
  --ok: var(--app-success);
  --warn: var(--app-warning);
  --bad: var(--app-danger);
  --shadow: var(--app-shadow);

  --if-bg: var(--app-bg);
  --if-panel: var(--app-surface);
  --if-panel-2: var(--app-surface-soft);
  --if-panel-3: var(--app-primary-soft);
  --if-line: var(--app-line);
  --if-line-strong: var(--app-line-strong);
  --if-text: var(--app-text);
  --if-muted: var(--app-muted);
  --if-faint: var(--app-faint);
  --if-red: var(--app-danger);
  --if-red-2: var(--app-danger);
  --if-gold: var(--gold);
  --if-ok: var(--app-success);
  --if-bad: var(--app-danger);
  --if-radius: var(--radius);
  --font-ui-1: var(--font);
  --text-light: var(--app-muted);
  --border-light: var(--app-line);
  --border-hover: var(--app-primary);
  --shadow-base: var(--app-shadow-sm);
  --shadow-hover: var(--app-shadow);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --app-bg: #0f172a;
  --app-bg-soft: #111c31;
  --app-surface: #172033;
  --app-surface-soft: #1d2940;
  --app-text: #e5edf7;
  --app-muted: #a0aec0;
  --app-faint: #718096;
  --app-line: #334155;
  --app-line-strong: #475569;
  --app-primary: #8fb7ee;
  --app-primary-hover: #b5d0f5;
  --app-primary-soft: #203550;
  --app-danger: #f06b61;
  --app-success: #8bd2a9;
  --app-warning: #e6bd6a;
  --app-on-primary: #0b1628;
  --app-overlay: rgba(2, 6, 23, 0.68);
  --app-glass: rgba(23, 32, 51, 0.94);
  --app-shadow: 0 18px 44px rgba(0, 0, 0, 0.28);
  --app-shadow-sm: 0 8px 22px rgba(0, 0, 0, 0.22);
}

* {
  box-sizing: border-box;
  letter-spacing: 0;
}

html,
body,
body * {
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

input,
textarea,
select,
[contenteditable="true"],
[contenteditable=""] {
  -webkit-user-select: text;
  user-select: text;
  -webkit-touch-callout: default;
}

html {
  min-height: 100%;
  background: var(--app-bg);
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--app-text);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0) 260px),
    var(--app-bg);
  font-family: var(--font);
  line-height: 1.55;
  overflow-x: hidden;
}

:root[data-theme="dark"] body {
  background:
    linear-gradient(180deg, rgba(148, 163, 184, 0.06), rgba(15, 23, 42, 0) 280px),
    var(--app-bg);
}

a {
  color: inherit;
}

img {
  max-width: 100%;
}

.app-shell {
  min-height: 100vh;
  padding-bottom: 48px;
}

.app-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 64px;
  padding: 12px clamp(16px, 4vw, 34px);
  background: color-mix(in srgb, var(--app-surface) 94%, transparent);
  border-bottom: 1px solid var(--app-line);
  box-shadow: var(--app-shadow-sm);
  backdrop-filter: blur(14px);
}

.app-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  min-width: 0;
  color: var(--app-text);
  text-decoration: none;
  font-weight: 700;
}

.app-brand-mark {
  width: 22px;
  height: 22px;
  display: inline-block;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--app-primary), #73a5d8);
  box-shadow: none;
}

.app-brand-avatar {
  width: 38px;
  height: 38px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--app-line);
  background: var(--app-surface-soft);
}

.app-brand-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.app-nav-toggle {
  display: none;
  width: 42px;
  height: 38px;
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-direction: column;
  padding: 0;
  color: var(--app-text);
  background: var(--app-surface-soft);
  border: 1px solid var(--app-line);
  border-radius: var(--radius);
}

.app-nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--app-text);
}

.app-nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: thin;
}

.app-nav-links a,
.app-nav-group-toggle,
.app-user,
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  min-height: 36px;
  padding: 8px 12px;
  color: var(--app-text);
  background: var(--app-surface-soft);
  border: 1px solid var(--app-line);
  border-radius: var(--radius);
  box-shadow: none;
  text-decoration: none;
  font: inherit;
  font-size: 0.92rem;
  line-height: 1.1;
  cursor: pointer;
}

.app-nav-links a:hover,
.app-nav-links a[aria-current="page"],
.app-nav-group-toggle:hover,
.theme-toggle:hover {
  color: var(--app-primary);
  background: var(--app-primary-soft);
  border-color: var(--app-primary);
}

.app-nav-group {
  position: relative;
  display: inline-flex;
  flex: 0 0 auto;
}

.app-nav-group-toggle {
  gap: 7px;
}

.app-nav-group-toggle::after {
  content: "";
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid var(--app-muted);
}

.app-nav-submenu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 130;
  min-width: 156px;
  display: none;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 8px;
  background: var(--app-surface);
  border: 1px solid var(--app-line);
  border-radius: var(--radius);
  box-shadow: var(--app-shadow);
}

.app-nav-group:hover .app-nav-submenu,
.app-nav-group.is-open .app-nav-submenu {
  display: grid;
}

.theme-toggle {
  gap: 6px;
  white-space: nowrap;
}

.theme-toggle::before {
  content: "☀";
  font-size: 0.95rem;
}

:root[data-theme="dark"] .theme-toggle::before {
  content: "☾";
}

.theme-toggle-floating {
  position: fixed;
  right: 14px;
  bottom: 14px;
  z-index: 5000;
}

.app-main {
  width: min(1220px, calc(100vw - 28px));
  margin: 0 auto;
  padding: clamp(18px, 3vw, 34px) 0;
}

.app-page,
.content,
.content-container {
  color: var(--app-text);
  background: var(--app-surface);
  border: 1px solid var(--app-line);
  border-radius: var(--radius);
  box-shadow: var(--app-shadow);
}

.app-page {
  padding: clamp(18px, 2.6vw, 30px);
}

.app-body-admin .app-page,
.app-body-online .app-page {
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
}

.app-page-header {
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--app-line);
}

.app-page-header:empty {
  display: none;
}

.app-page-content {
  min-width: 0;
}

.app-footer {
  padding: 18px;
  color: var(--app-muted);
  text-align: center;
}

.app-flash,
.flash,
.flash-message,
.alert,
.message {
  margin: 0 0 16px;
  padding: 12px 14px;
  color: var(--app-text);
  background: var(--app-primary-soft);
  border: 1px solid var(--app-line);
  border-left: 3px solid var(--app-primary);
  border-radius: var(--radius);
}

.content,
.section-card,
.form-card,
.login-card,
.panel,
.card,
.song-card,
.form-section,
.nav-list {
  color: var(--app-text);
}

.section-card,
.form-card,
.login-card,
.panel,
.card,
.song-card {
  background: var(--app-surface) !important;
  border: 1px solid var(--app-line) !important;
  border-radius: var(--radius) !important;
  box-shadow: var(--app-shadow-sm) !important;
}

.bg-white,
.bg-gray-50,
.bg-slate-50 {
  background-color: var(--app-surface) !important;
}

.text-gray-300,
.text-gray-400,
.text-gray-500,
.text-gray-600,
.text-slate-400,
.text-slate-500,
.text-slate-600 {
  color: var(--app-muted) !important;
}

.text-white {
  color: #fff !important;
}

.text-primary {
  color: var(--app-primary) !important;
}

h1,
h2,
h3,
h4 {
  color: var(--app-text);
  line-height: 1.25;
}

h1 {
  margin: 0;
  font-size: clamp(1.45rem, 3vw, 2.1rem);
}

h2 {
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
}

.page-title,
.section-title,
.form-title,
.result-title,
.login-title,
.changeinfo-title,
.faq-title,
.userptt-title,
.board-title,
.group-title,
.banner-section-title,
.monthly-banner-title,
.char-group-title,
.rating-title,
.song-title,
.course-title {
  color: var(--app-text);
  border-color: var(--app-line);
  text-shadow: none;
}

label,
.label,
.hint,
.meta,
.player-meta,
.detail-label,
.result-label,
.status-text,
.current-info,
.tip-content,
.faq-answer-text,
.announcement-content,
.empty-tip,
.no-data {
  color: var(--app-muted);
}

input,
select,
textarea {
  color: var(--app-text);
  background: var(--app-surface);
  border: 1px solid var(--app-line-strong);
  border-radius: var(--radius);
  box-shadow: none;
  font: inherit;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--app-primary);
  outline: 2px solid color-mix(in srgb, var(--app-primary) 28%, transparent);
  outline-offset: 1px;
}

select option {
  color: var(--app-text);
  background: var(--app-surface);
}

button,
input[type="submit"],
input[type="button"],
.submit-btn,
.refresh-btn,
.search-btn,
.action-btn,
.back-btn,
.btn,
.button,
.tab-button,
.faq-question-btn,
.login-submit-btn,
.changeinfo-submit-btn,
.userptt-function-btn,
.userptt-download-btn,
.monthly-buy-btn,
.reset-banner-btn,
.single-draw-btn,
.ten-draw-btn,
.again-btn,
.makeup-btn,
.filter-chip {
  min-height: 38px;
  color: #fff;
  background: var(--app-primary);
  border: 1px solid var(--app-primary);
  border-radius: var(--radius);
  box-shadow: none;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transform: none;
}

button:hover,
input[type="submit"]:hover,
input[type="button"]:hover,
.submit-btn:hover,
.refresh-btn:hover,
.search-btn:hover,
.action-btn:hover,
.back-btn:hover,
.btn:hover,
.button:hover,
.tab-button:hover,
.faq-question-btn:hover,
.login-submit-btn:hover,
.changeinfo-submit-btn:hover,
.userptt-function-btn:hover,
.userptt-download-btn:hover,
.monthly-buy-btn:hover,
.reset-banner-btn:hover,
.single-draw-btn:hover,
.ten-draw-btn:hover,
.again-btn:hover,
.makeup-btn:hover,
.filter-chip:hover,
.filter-chip.is-active {
  background: var(--app-primary-hover);
  border-color: var(--app-primary-hover);
}

button:disabled,
input[type="submit"]:disabled,
.refresh-btn:disabled {
  color: var(--app-muted);
  background: var(--app-surface-soft);
  border-color: var(--app-line);
  cursor: not-allowed;
}

.delete-btn,
.btn.danger,
.danger {
  background: var(--app-danger) !important;
  border-color: var(--app-danger) !important;
  color: #fff !important;
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--app-line);
  border-radius: var(--radius);
}

.table-scroll table {
  border: 0 !important;
}

table {
  width: 100%;
  color: var(--app-text);
  background: var(--app-surface);
  border: 1px solid var(--app-line);
  border-collapse: collapse;
}

th {
  color: var(--app-muted);
  background: var(--app-surface-soft);
  border-bottom: 1px solid var(--app-line);
}

td {
  color: var(--app-text);
  border-bottom: 1px solid var(--app-line);
}

th,
td {
  padding: 10px 12px;
  text-align: left;
}

tr:hover td {
  background: var(--app-primary-soft);
}

.app-body-admin .container,
.app-body-online .container,
.container {
  width: min(100%, 1080px);
  max-width: 1080px;
  margin: 0 auto;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
}

@media (max-width: 760px) {
  .app-nav {
    align-items: center;
    flex-wrap: wrap;
  }

  .app-nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .app-nav-links {
    flex-basis: 100%;
    display: none;
    align-items: stretch;
    flex-direction: column;
    padding: 10px;
    background: var(--app-surface);
    border: 1px solid var(--app-line);
    border-radius: var(--radius);
    box-shadow: var(--app-shadow);
    overflow: visible;
  }

  .app-nav.is-open .app-nav-links {
    display: flex;
  }

  .app-nav-links a,
  .app-nav-group,
  .app-nav-group-toggle,
  .app-user,
  .theme-toggle {
    width: 100%;
  }

  .app-nav-submenu {
    position: static;
    width: 100%;
    margin-top: 6px;
    box-shadow: none;
  }

  .app-page {
    padding: 16px;
  }
}