/* ============================================================
   Identity · MD3 定制版（无阴影 / 受控圆角 / 动态色彩）
   ============================================================ */

:root {
  /* 圆角规范 */
  --radius-small: 4px;
  --radius-medium: 8px;
  --radius-large: 12px;

  /* MD3 色彩 Token（亮色） */
  --md-sys-color-primary: #6750A4;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #EADDFF;
  --md-sys-color-on-primary-container: #21005D;
  --md-sys-color-secondary: #625B71;
  --md-sys-color-on-secondary: #FFFFFF;
  --md-sys-color-secondary-container: #E8DEF8;
  --md-sys-color-on-secondary-container: #1D192B;
  --md-sys-color-tertiary: #7D5260;
  --md-sys-color-error: #B3261E;
  --md-sys-color-on-error: #FFFFFF;
  --md-sys-color-error-container: #F9DEDC;
  --md-sys-color-background: #FEF7FF;
  --md-sys-color-on-background: #1D1B20;
  --md-sys-color-surface: #FFFBFE;
  --md-sys-color-on-surface: #1C1B1F;
  --md-sys-color-surface-variant: #E7E0EC;
  --md-sys-color-on-surface-variant: #49454F;
  --md-sys-color-outline: #79747E;
  --md-sys-color-outline-variant: #CAC4D0;
  --md-sys-color-inverse-surface: #313033;
  --md-sys-color-inverse-on-surface: #F4EFF4;

  /* 无阴影 */
  --md-sys-elevation-0: none;
  --md-sys-elevation-1: none;
  --md-sys-elevation-2: none;

  /* 布局 */
  --sidebar-width: 260px;
  --font-family: "Roboto", "Segoe UI", "PingFang SC", "Microsoft YaHei",
    "Noto Sans CJK SC", system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --md-sys-color-primary: #D0BCFF;
    --md-sys-color-on-primary: #381E72;
    --md-sys-color-primary-container: #4F378B;
    --md-sys-color-on-primary-container: #EADDFF;
    --md-sys-color-secondary: #CCC2DC;
    --md-sys-color-on-secondary: #332D41;
    --md-sys-color-secondary-container: #4A4458;
    --md-sys-color-on-secondary-container: #E8DEF8;
    --md-sys-color-tertiary: #EFB8C8;
    --md-sys-color-error: #F2B8B5;
    --md-sys-color-on-error: #601410;
    --md-sys-color-error-container: #8C1D18;
    --md-sys-color-background: #141218;
    --md-sys-color-on-background: #E6E0E9;
    --md-sys-color-surface: #1C1B1F;
    --md-sys-color-on-surface: #E6E1E5;
    --md-sys-color-surface-variant: #49454F;
    --md-sys-color-on-surface-variant: #CAC4D0;
    --md-sys-color-outline: #938F99;
    --md-sys-color-outline-variant: #49454F;
    --md-sys-color-inverse-surface: #E6E1E5;
    --md-sys-color-inverse-on-surface: #313033;
  }
}

/* 用户可选配色（覆盖系统偏好） */
body[data-theme='light'] {
  --md-sys-color-primary: #6750A4;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #EADDFF;
  --md-sys-color-on-primary-container: #21005D;
  --md-sys-color-secondary: #625B71;
  --md-sys-color-on-secondary: #FFFFFF;
  --md-sys-color-secondary-container: #E8DEF8;
  --md-sys-color-on-secondary-container: #1D192B;
  --md-sys-color-tertiary: #7D5260;
  --md-sys-color-error: #B3261E;
  --md-sys-color-on-error: #FFFFFF;
  --md-sys-color-error-container: #F9DEDC;
  --md-sys-color-background: #FEF7FF;
  --md-sys-color-on-background: #1D1B20;
  --md-sys-color-surface: #FFFBFE;
  --md-sys-color-on-surface: #1C1B1F;
  --md-sys-color-surface-variant: #E7E0EC;
  --md-sys-color-on-surface-variant: #49454F;
  --md-sys-color-outline: #79747E;
  --md-sys-color-outline-variant: #CAC4D0;
  --md-sys-color-inverse-surface: #313033;
  --md-sys-color-inverse-on-surface: #F4EFF4;
}

body[data-theme='dark'] {
  --md-sys-color-primary: #D0BCFF;
  --md-sys-color-on-primary: #381E72;
  --md-sys-color-primary-container: #4F378B;
  --md-sys-color-on-primary-container: #EADDFF;
  --md-sys-color-secondary: #CCC2DC;
  --md-sys-color-on-secondary: #332D41;
  --md-sys-color-secondary-container: #4A4458;
  --md-sys-color-on-secondary-container: #E8DEF8;
  --md-sys-color-tertiary: #EFB8C8;
  --md-sys-color-error: #F2B8B5;
  --md-sys-color-on-error: #601410;
  --md-sys-color-error-container: #8C1D18;
  --md-sys-color-background: #141218;
  --md-sys-color-on-background: #E6E0E9;
  --md-sys-color-surface: #1C1B1F;
  --md-sys-color-on-surface: #E6E1E5;
  --md-sys-color-surface-variant: #49454F;
  --md-sys-color-on-surface-variant: #CAC4D0;
  --md-sys-color-outline: #938F99;
  --md-sys-color-outline-variant: #49454F;
  --md-sys-color-inverse-surface: #E6E1E5;
  --md-sys-color-inverse-on-surface: #313033;
}

/* 主色调色板 */
body[data-color='blue'] {
  --md-sys-color-primary: #0061A4;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #CFE5FF;
  --md-sys-color-on-primary-container: #001D31;
  --md-sys-color-secondary: #535F70;
  --md-sys-color-secondary-container: #D7E3F8;
  --md-sys-color-on-secondary-container: #101C2B;
  --md-sys-color-tertiary: #695778;
  --md-sys-color-tertiary-container: #F0DBFF;
  --md-sys-color-on-tertiary-container: #231530;
  --md-sys-color-background: #F8FAFF;
  --md-sys-color-on-background: #191C20;
  --md-sys-color-surface: #FBFCFF;
  --md-sys-color-on-surface: #191C20;
  --md-sys-color-surface-variant: #E0E2EC;
  --md-sys-color-on-surface-variant: #44474F;
  --md-sys-color-outline: #74777F;
  --md-sys-color-outline-variant: #C4C6D0;
  --md-sys-color-inverse-surface: #2E3136;
  --md-sys-color-inverse-on-surface: #F0F1F6;
}
body[data-color='teal'] {
  --md-sys-color-primary: #00696E;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #9CF1F7;
  --md-sys-color-on-primary-container: #002021;
  --md-sys-color-secondary: #4A6365;
  --md-sys-color-secondary-container: #CDE8EA;
  --md-sys-color-on-secondary-container: #051F21;
  --md-sys-color-tertiary: #505F7D;
  --md-sys-color-tertiary-container: #D6E3FF;
  --md-sys-color-on-tertiary-container: #0B1B37;
  --md-sys-color-background: #F7FAFB;
  --md-sys-color-on-background: #171D1D;
  --md-sys-color-surface: #FAFDFD;
  --md-sys-color-on-surface: #171D1D;
  --md-sys-color-surface-variant: #DBE4E5;
  --md-sys-color-on-surface-variant: #3F4949;
  --md-sys-color-outline: #6F797A;
  --md-sys-color-outline-variant: #BFC9CA;
  --md-sys-color-inverse-surface: #2D3232;
  --md-sys-color-inverse-on-surface: #EFF1F1;
}
body[data-color='green'] {
  --md-sys-color-primary: #006D40;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #9CF5BC;
  --md-sys-color-on-primary-container: #00210F;
  --md-sys-color-secondary: #51634F;
  --md-sys-color-secondary-container: #D4E8CF;
  --md-sys-color-on-secondary-container: #0F1F10;
  --md-sys-color-tertiary: #39656B;
  --md-sys-color-tertiary-container: #BCEBF2;
  --md-sys-color-on-tertiary-container: #001F24;
  --md-sys-color-background: #F7FBF6;
  --md-sys-color-on-background: #171D16;
  --md-sys-color-surface: #FAFDF8;
  --md-sys-color-on-surface: #171D16;
  --md-sys-color-surface-variant: #DEE5DA;
  --md-sys-color-on-surface-variant: #41493F;
  --md-sys-color-outline: #71796E;
  --md-sys-color-outline-variant: #C1C9BD;
  --md-sys-color-inverse-surface: #2E332C;
  --md-sys-color-inverse-on-surface: #EFF1E9;
}
body[data-color='rose'] {
  --md-sys-color-primary: #BA1A5B;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #FFD9E2;
  --md-sys-color-on-primary-container: #3F001D;
  --md-sys-color-secondary: #74565F;
  --md-sys-color-secondary-container: #FFD9E2;
  --md-sys-color-on-secondary-container: #2B151C;
  --md-sys-color-tertiary: #7C5634;
  --md-sys-color-tertiary-container: #FFDBC5;
  --md-sys-color-on-tertiary-container: #2E1500;
  --md-sys-color-background: #FDF8F9;
  --md-sys-color-on-background: #201A1C;
  --md-sys-color-surface: #FEFBFC;
  --md-sys-color-on-surface: #201A1C;
  --md-sys-color-surface-variant: #E9E0E3;
  --md-sys-color-on-surface-variant: #4F4547;
  --md-sys-color-outline: #827477;
  --md-sys-color-outline-variant: #D3C3C6;
  --md-sys-color-inverse-surface: #342F30;
  --md-sys-color-inverse-on-surface: #FBEFF1;
}
body[data-color='orange'] {
  --md-sys-color-primary: #8B5000;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #FFDDB7;
  --md-sys-color-on-primary-container: #2E1600;
  --md-sys-color-secondary: #6F5B40;
  --md-sys-color-on-secondary: #FFFFFF;
  --md-sys-color-secondary-container: #FBDFBD;
  --md-sys-color-on-secondary-container: #26190A;
  --md-sys-color-tertiary: #536540;
  --md-sys-color-tertiary-container: #D6EABA;
  --md-sys-color-on-tertiary-container: #111F04;
  --md-sys-color-background: #FDF8F3;
  --md-sys-color-on-background: #1F1B16;
  --md-sys-color-surface: #FFFBF7;
  --md-sys-color-on-surface: #1F1B16;
  --md-sys-color-surface-variant: #F0E4D7;
  --md-sys-color-on-surface-variant: #4E463E;
  --md-sys-color-outline: #7F766D;
  --md-sys-color-outline-variant: #D1C5B9;
  --md-sys-color-inverse-surface: #342F29;
  --md-sys-color-inverse-on-surface: #F9EFE6;
}

/* 深色模式下的色板（明暗搭配同色调，次级颜色一并生效） */
body[data-theme='dark'][data-color='blue'] {
  --md-sys-color-primary: #A6C8FF;
  --md-sys-color-on-primary: #003258;
  --md-sys-color-primary-container: #00497D;
  --md-sys-color-on-primary-container: #CFE5FF;
  --md-sys-color-secondary: #BAC8DA;
  --md-sys-color-on-secondary: #253140;
  --md-sys-color-secondary-container: #3B4857;
  --md-sys-color-on-secondary-container: #D7E3F8;
  --md-sys-color-tertiary: #D9BDF2;
  --md-sys-color-tertiary-container: #54466A;
  --md-sys-color-on-tertiary-container: #F0DBFF;
  --md-sys-color-background: #111418;
  --md-sys-color-on-background: #E2E2E9;
  --md-sys-color-surface: #191C20;
  --md-sys-color-on-surface: #E2E2E9;
  --md-sys-color-surface-variant: #44474F;
  --md-sys-color-on-surface-variant: #C4C6D0;
  --md-sys-color-outline: #8E9099;
  --md-sys-color-outline-variant: #44474F;
  --md-sys-color-inverse-surface: #E2E2E9;
  --md-sys-color-inverse-on-surface: #2E3136;
}
body[data-theme='dark'][data-color='teal'] {
  --md-sys-color-primary: #82D3D8;
  --md-sys-color-on-primary: #003739;
  --md-sys-color-primary-container: #004F53;
  --md-sys-color-on-primary-container: #9CF1F7;
  --md-sys-color-secondary: #B1CCCD;
  --md-sys-color-on-secondary: #1D3436;
  --md-sys-color-secondary-container: #384B4C;
  --md-sys-color-on-secondary-container: #CDE8EA;
  --md-sys-color-tertiary: #B8C7E8;
  --md-sys-color-tertiary-container: #414F6D;
  --md-sys-color-on-tertiary-container: #D6E3FF;
  --md-sys-color-background: #0F1414;
  --md-sys-color-on-background: #DFE4E4;
  --md-sys-color-surface: #171C1C;
  --md-sys-color-on-surface: #DFE4E4;
  --md-sys-color-surface-variant: #3F4949;
  --md-sys-color-on-surface-variant: #BFC9CA;
  --md-sys-color-outline: #8A9494;
  --md-sys-color-outline-variant: #3F4949;
  --md-sys-color-inverse-surface: #DFE4E4;
  --md-sys-color-inverse-on-surface: #2D3232;
}
body[data-theme='dark'][data-color='green'] {
  --md-sys-color-primary: #7DD99D;
  --md-sys-color-on-primary: #00391E;
  --md-sys-color-primary-container: #005232;
  --md-sys-color-on-primary-container: #9CF5BC;
  --md-sys-color-secondary: #B8CCB3;
  --md-sys-color-on-secondary: #243424;
  --md-sys-color-secondary-container: #3A4B39;
  --md-sys-color-on-secondary-container: #D4E8CF;
  --md-sys-color-tertiary: #99CCD3;
  --md-sys-color-tertiary-container: #334D52;
  --md-sys-color-on-tertiary-container: #BCEBF2;
  --md-sys-color-background: #101411;
  --md-sys-color-on-background: #E0E4DD;
  --md-sys-color-surface: #181D18;
  --md-sys-color-on-surface: #E0E4DD;
  --md-sys-color-surface-variant: #41493F;
  --md-sys-color-on-surface-variant: #C1C9BD;
  --md-sys-color-outline: #8B9388;
  --md-sys-color-outline-variant: #41493F;
  --md-sys-color-inverse-surface: #E0E4DD;
  --md-sys-color-inverse-on-surface: #2E332C;
}
body[data-theme='dark'][data-color='rose'] {
  --md-sys-color-primary: #FFB1C8;
  --md-sys-color-on-primary: #65002B;
  --md-sys-color-primary-container: #8E0045;
  --md-sys-color-on-primary-container: #FFD9E2;
  --md-sys-color-secondary: #E1BDC7;
  --md-sys-color-on-secondary: #422932;
  --md-sys-color-secondary-container: #5B3F48;
  --md-sys-color-on-secondary-container: #FFD9E2;
  --md-sys-color-tertiary: #E2C1A0;
  --md-sys-color-tertiary-container: #6A4A2C;
  --md-sys-color-on-tertiary-container: #FFDBC5;
  --md-sys-color-background: #151113;
  --md-sys-color-on-background: #EDE0E3;
  --md-sys-color-surface: #1D191B;
  --md-sys-color-on-surface: #EDE0E3;
  --md-sys-color-surface-variant: #4F4547;
  --md-sys-color-on-surface-variant: #D3C3C6;
  --md-sys-color-outline: #9E8D90;
  --md-sys-color-outline-variant: #4F4547;
  --md-sys-color-inverse-surface: #EDE0E3;
  --md-sys-color-inverse-on-surface: #342F30;
}
body[data-theme='dark'][data-color='orange'] {
  --md-sys-color-primary: #FFB871;
  --md-sys-color-on-primary: #4A2800;
  --md-sys-color-primary-container: #6B3C00;
  --md-sys-color-on-primary-container: #FFDDB7;
  --md-sys-color-secondary: #DCC6A9;
  --md-sys-color-on-secondary: #3D3020;
  --md-sys-color-secondary-container: #554638;
  --md-sys-color-on-secondary-container: #FBDFBD;
  --md-sys-color-tertiary: #B5CC99;
  --md-sys-color-tertiary-container: #3F4E2E;
  --md-sys-color-on-tertiary-container: #D6EABA;
  --md-sys-color-background: #16120D;
  --md-sys-color-on-background: #EFE9E2;
  --md-sys-color-surface: #1E1A15;
  --md-sys-color-on-surface: #EFE9E2;
  --md-sys-color-surface-variant: #4E463E;
  --md-sys-color-on-surface-variant: #D1C5B9;
  --md-sys-color-outline: #9A9188;
  --md-sys-color-outline-variant: #4E463E;
  --md-sys-color-inverse-surface: #EFE9E2;
  --md-sys-color-inverse-on-surface: #342F29;
}

* { box-sizing: border-box; margin: 0; padding: 0; box-shadow: none !important; }

html, body { height: 100%; }

body {
  font-family: var(--font-family);
  font-size: 14px;
  line-height: 1.6;
  background: var(--md-sys-color-background);
  color: var(--md-sys-color-on-background);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--md-sys-color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { font-weight: 500; color: var(--md-sys-color-on-surface); }
h1 { font-size: 28px; } h2 { font-size: 22px; } h3 { font-size: 18px; } h4 { font-size: 16px; }

/* ---------- 布局 ---------- */
.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--md-sys-color-surface);
  border-right: 1px solid var(--md-sys-color-outline-variant);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 64px;
  padding: 0 20px;
  font-size: 20px;
  font-weight: 500;
  color: var(--md-sys-color-primary);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}
.sidebar .brand .material-symbols-outlined { font-size: 26px; }

.sidebar .nav { padding: 12px 10px; flex: 1; overflow-y: auto; }
.sidebar .nav-label {
  padding: 10px 14px 4px;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--md-sys-color-on-surface-variant);
}
.sidebar .nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-small);
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 2px;
}
.sidebar .nav a:hover { background: var(--md-sys-color-surface-variant); text-decoration: none; }
.sidebar .nav a.active {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}
.sidebar .nav a .material-symbols-outlined { font-size: 20px; }

.sidebar .user-box {
  height: 73px;
  padding: 0 20px;
  border-top: 1px solid var(--md-sys-color-outline-variant);
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px;
}
.sidebar .user-box .uname {
  font-weight: 500;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.main { flex: 1; padding: 28px 32px; min-width: 0; max-width: 1200px; }
.main.narrow { max-width: 720px; margin: 0 auto; width: 100%; }

.page-title { margin-bottom: 20px; display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.page-title h1 { display: flex; align-items: center; gap: 10px; }

/* ---------- 组件 ---------- */
.md-button {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 24px;
  border-radius: var(--radius-small);
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  transition: filter 0.2s;
  text-decoration: none !important;
}
.md-button:hover { filter: brightness(0.92); }
.md-button:disabled { opacity: 0.5; cursor: not-allowed; }

.md-button.tonal {
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}
.md-button.outlined {
  background: transparent;
  color: var(--md-sys-color-primary);
  border: 1px solid var(--md-sys-color-outline);
}
.md-button.text {
  background: transparent;
  color: var(--md-sys-color-primary);
  padding: 8px 12px;
}
.md-button.danger { background: var(--md-sys-color-error); color: var(--md-sys-color-on-error); }
.md-button.small { padding: 6px 14px; font-size: 13px; }

.md-card {
  padding: 16px;
  border-radius: var(--radius-medium);
  background: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline-variant);
}

.md-dialog {
  padding: 24px;
  border-radius: var(--radius-large);
  background: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline);
  max-width: 560px;
  width: 100%;
}

.md-field {
  display: block;
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-small);
  border: 1px solid var(--md-sys-color-outline);
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  font-family: inherit;
  font-size: 14px;
  transition: border-color 0.2s;
}
.md-field:focus { outline: none; border-color: var(--md-sys-color-primary); }
textarea.md-field { resize: vertical; min-height: 90px; }

.md-label { display: block; margin: 14px 0 6px; font-size: 13px; color: var(--md-sys-color-on-surface-variant); }

.md-tag {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 10px;
  border-radius: var(--radius-small);
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  font-size: 12px;
}
.md-tag.green { background: #D7EDDD; color: #1B5E20; }
.md-tag.red { background: var(--md-sys-color-error-container); color: var(--md-sys-color-on-error-container); }
.md-tag.blue { background: #D6E4FF; color: #0B3B8C; }
.md-tag.grey { background: var(--md-sys-color-surface-variant); color: var(--md-sys-color-on-surface-variant); }
@media (prefers-color-scheme: dark) {
  .md-tag.green { background: #1B5E20; color: #D7EDDD; }
  .md-tag.blue { background: #0B3B8C; color: #D6E4FF; }
}

.md-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-small);
  border: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  font-size: 13px;
}
.md-chip.active {
  background: var(--md-sys-color-secondary-container);
  border-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

/* 列表 / 表格 */
.md-list { display: flex; flex-direction: column; gap: 10px; }
.md-list-item {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius-medium);
  border: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface);
  text-decoration: none !important;
  transition: border-color 0.2s;
}
.md-list-item:hover { border-color: var(--md-sys-color-primary); }
.md-list-item .title { font-weight: 500; color: var(--md-sys-color-on-surface); }
.md-list-item .desc { font-size: 13px; color: var(--md-sys-color-on-surface-variant); margin-top: 2px; }
.md-list-item .meta { display: flex; gap: 8px; align-items: center; flex-shrink: 0; }

.md-table { width: 100%; border-collapse: collapse; }
.md-table th {
  text-align: left; padding: 10px 12px;
  font-size: 12px; font-weight: 500; letter-spacing: 0.5px;
  color: var(--md-sys-color-on-surface-variant);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  white-space: nowrap;
}
.md-table td { padding: 10px 12px; border-bottom: 1px solid var(--md-sys-color-outline-variant); }
.md-table tr:hover td { background: var(--md-sys-color-surface-variant); }
.md-table .actions { display: flex; gap: 6px; justify-content: flex-end; }

/* 消息气泡 */
.message {
  display: flex; gap: 12px; margin-bottom: 12px;
  animation: msg-in 0.25s ease;
}
@keyframes msg-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; } }
.message .avatar {
  width: 36px; height: 36px; flex-shrink: 0;
  border-radius: var(--radius-medium);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  background: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface-variant);
  user-select: none;
}
.message.user .avatar { background: var(--md-sys-color-primary); color: var(--md-sys-color-on-primary); }
.message .bubble {
  padding: 10px 14px;
  border-radius: var(--radius-medium);
  background: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline-variant);
  max-width: 760px;
  min-width: 0;
  word-break: break-word;
}
.message.user { flex-direction: row-reverse; }
.message.user .bubble { background: var(--md-sys-color-primary-container); border-color: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container); }
.message .bubble img.attach { max-width: 320px; border-radius: var(--radius-small); display: block; margin-bottom: 6px; }

.message .bubble pre {
  background: var(--md-sys-color-inverse-surface);
  color: var(--md-sys-color-inverse-on-surface);
  padding: 12px;
  border-radius: var(--radius-small);
  overflow-x: auto;
  margin: 8px 0;
  font-size: 13px;
}
.message .bubble code { font-family: "Cascadia Code", Consolas, monospace; font-size: 13px; }
.message .bubble :not(pre) > code {
  background: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface-variant);
  padding: 1px 6px;
  border-radius: var(--radius-small);
}
.message .bubble blockquote {
  border-left: 3px solid var(--md-sys-color-primary);
  padding-left: 12px;
  margin: 8px 0;
  color: var(--md-sys-color-on-surface-variant);
}
.message .bubble ul, .message .bubble ol { padding-left: 20px; margin: 6px 0; }
.message .bubble table { border-collapse: collapse; margin: 8px 0; }
.message .bubble th, .message .bubble td { border: 1px solid var(--md-sys-color-outline-variant); padding: 6px 10px; }
.message .bubble h1, .message .bubble h2, .message .bubble h3 { margin: 10px 0 6px; }
.message .bubble p { margin: 6px 0; }

/* 聊天页 */
.chat-layout { display: flex; height: 100vh; }
.chat-main {
  flex: 1; display: flex; flex-direction: column;
  min-width: 0; height: 100vh;
}
.chat-header {
  display: flex; align-items: center; gap: 12px;
  height: 64px;
  padding: 0 20px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface);
}
.chat-body { flex: 1; overflow-y: auto; padding: 24px 20px; }
.chat-body .inner { max-width: 860px; margin: 0 auto; }
.chat-empty {
  text-align: center; color: var(--md-sys-color-on-surface-variant);
  padding: 60px 20px;
}
.chat-empty .material-symbols-outlined { font-size: 56px; opacity: 0.5; display: block; margin-bottom: 12px; }
.chat-input-bar {
  border-top: 1px solid var(--md-sys-color-outline-variant);
  padding: 14px 20px;
  background: var(--md-sys-color-surface);
}
.chat-input-bar .inner { max-width: 860px; margin: 0 auto; display: flex; gap: 10px; align-items: flex-end; }
.chat-input-bar textarea { flex: 1; min-height: 44px; max-height: 180px; }
.chat-error {
  display: none;
  max-width: 860px; margin: 0 auto 8px;
  font-size: 13px;
  padding: 8px 12px;
  border-radius: var(--radius-small);
  background: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
}
.chat-error.show { display: block; animation: msg-in 0.2s ease; }
.attach-strip {
  display: flex; flex-wrap: wrap; gap: 6px;
  max-width: 860px; margin: 0 auto 8px;
}
.attach-strip:empty { display: none; }
.attach-strip img.attach {
  width: 56px; height: 56px;
  object-fit: cover;
  border-radius: var(--radius-small);
  border: 1px solid var(--md-sys-color-outline-variant);
}
.message .avatar .material-symbols-outlined { font-size: 20px; }
.message .bubble .typing-indicator {
  display: inline-flex; gap: 5px; align-items: center; padding: 6px 2px;
}
.message .bubble .typing-indicator span {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--md-sys-color-on-surface-variant);
  animation: typing-bounce 1.2s infinite ease-in-out;
}
.message .bubble .typing-indicator span:nth-child(2) { animation-delay: 0.15s; }
.message .bubble .typing-indicator span:nth-child(3) { animation-delay: 0.3s; }
@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-4px); opacity: 1; }
}
.streaming-cursor::after {
  content: "▋";
  color: var(--md-sys-color-primary);
  animation: blink 1s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* 工具条 */
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; align-items: center; }
.spacer { flex: 1; }

/* 状态 / 提示 */
.flash-wrap { position: fixed; top: 16px; right: 16px; z-index: 100; display: flex; flex-direction: column; gap: 8px; }
.flash {
  padding: 12px 18px;
  border-radius: var(--radius-medium);
  background: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline-variant);
  max-width: 360px;
  animation: msg-in 0.3s ease;
}
.flash.success { border-color: #2E7D32; color: #2E7D32; }
.flash.error { border-color: var(--md-sys-color-error); color: var(--md-sys-color-error); }
.flash.info { border-color: var(--md-sys-color-primary); color: var(--md-sys-color-primary); }

.empty-hint { text-align: center; padding: 48px 20px; color: var(--md-sys-color-on-surface-variant); }
.empty-hint .material-symbols-outlined { font-size: 48px; opacity: 0.5; display: block; margin-bottom: 10px; }

.pagination { display: flex; gap: 6px; justify-content: center; margin-top: 20px; align-items: center; }
.pagination a, .pagination span {
  padding: 6px 12px; border-radius: var(--radius-small);
  border: 1px solid var(--md-sys-color-outline-variant);
  color: var(--md-sys-color-on-surface-variant);
  font-size: 13px; text-decoration: none !important;
}
.pagination a:hover { border-color: var(--md-sys-color-primary); color: var(--md-sys-color-primary); }
.pagination .current { background: var(--md-sys-color-primary); color: var(--md-sys-color-on-primary); border-color: var(--md-sys-color-primary); }

/* 表单 */
.form-card { max-width: 460px; margin: 40px auto; }
.form-card h2 { text-align: center; margin-bottom: 6px; }
.form-sub { text-align: center; color: var(--md-sys-color-on-surface-variant); margin-bottom: 20px; font-size: 13px; }
.form-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 18px; }
.form-row { display: flex; gap: 12px; }
.form-row > * { flex: 1; }

/* 统计卡片 */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat-card {
  padding: 16px; border-radius: var(--radius-medium);
  border: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface);
}
.stat-card .num { font-size: 26px; font-weight: 500; color: var(--md-sys-color-primary); }
.stat-card .label { font-size: 13px; color: var(--md-sys-color-on-surface-variant); }

/* 网格 */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.grid-item { padding: 16px; border-radius: var(--radius-medium); border: 1px solid var(--md-sys-color-outline-variant); background: var(--md-sys-color-surface); display: flex; flex-direction: column; gap: 8px; }
.grid-item .title { font-weight: 500; }
.grid-item .desc { font-size: 13px; color: var(--md-sys-color-on-surface-variant); flex: 1; }
.grid-item .foot { display: flex; gap: 8px; align-items: center; }

/* 会话列表 */
.session-item .preview { font-size: 13px; color: var(--md-sys-color-on-surface-variant); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 对话框 */
.modal-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,0.4);
  display: none; align-items: center; justify-content: center; z-index: 50; padding: 20px;
}
.modal-mask.show { display: flex; }
.modal-mask .md-dialog { animation: msg-in 0.2s ease; }

/* Markdown 渲染容器 */
.markdown { word-break: break-word; }

/* 工具状态行 */
.tool-line {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--md-sys-color-on-surface-variant);
  background: var(--md-sys-color-surface-variant);
  border-radius: var(--radius-small);
  padding: 3px 10px;
  margin-bottom: 8px;
}

/* 上传区 */
.upload-zone {
  border: 1px dashed var(--md-sys-color-outline);
  border-radius: var(--radius-medium);
  padding: 32px;
  text-align: center;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  transition: border-color 0.2s;
}
.upload-zone:hover, .upload-zone.dragover { border-color: var(--md-sys-color-primary); color: var(--md-sys-color-primary); }

/* 小工具 */
.muted { color: var(--md-sys-color-on-surface-variant); font-size: 13px; }
.text-ellipsis { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; } .mb-24 { margin-bottom: 24px; }
.flex { display: flex; gap: 8px; align-items: center; }
.flex-col { display: flex; flex-direction: column; gap: 8px; }
.wrap { flex-wrap: wrap; }
.center { text-align: center; }

.monospace { font-family: "Cascadia Code", Consolas, monospace; }

/* ---------- 头像 ---------- */
.avatar-mini {
  width: 36px; height: 36px; flex-shrink: 0;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--md-sys-color-outline-variant);
}
.avatar-mini-placeholder {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; flex-shrink: 0;
  border-radius: 50%;
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}
.avatar-mini-placeholder .material-symbols-outlined { font-size: 20px; }
.avatar-m { width: 44px; height: 44px; border-radius: var(--radius-medium); object-fit: cover; flex-shrink: 0; }
.avatar-m.avatar-mini-placeholder { width: 44px; height: 44px; font-size: 22px; }
.avatar-l { width: 44px; height: 44px; border-radius: var(--radius-medium); object-fit: cover; }
.avatar-l.avatar-mini-placeholder { width: 44px; height: 44px; }
.avatar-xl { width: 72px; height: 72px; border-radius: var(--radius-medium); object-fit: cover; flex-shrink: 0; }
.avatar-xl.avatar-mini-placeholder { width: 72px; height: 72px; }
.avatar-xl.avatar-mini-placeholder .material-symbols-outlined { font-size: 32px; }
.message .avatar img {
  width: 100%; height: 100%;
  border-radius: inherit;
  object-fit: cover;
}

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--md-sys-color-surface-variant);
  border-radius: 8px;
  border: 2px solid transparent;
  background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover { background: var(--md-sys-color-outline-variant); }
::-webkit-scrollbar-corner { background: transparent; }
* { scrollbar-width: thin; scrollbar-color: var(--md-sys-color-outline-variant) transparent; }

/* 表格横向滚动容器 */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin-bottom: 12px; }
.table-scroll .md-table { min-width: 640px; }

/* ---------- 移动端菜单按钮 ---------- */
.menu-btn {
  display: none;
  align-items: center; justify-content: center;
  width: 40px; height: 40px;
  border-radius: var(--radius-medium);
  border: none;
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  flex-shrink: 0;
}
.menu-btn .material-symbols-outlined { font-size: 22px; }

.sidebar-mask {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 204;
}
.sidebar-mask.show { display: block; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  body.nav-open { overflow: hidden; }

  .menu-btn { display: inline-flex; }
  .chat-header .menu-btn { position: static; }

  .layout .sidebar {
    position: fixed; top: 0; left: -280px; bottom: 0;
    width: min(280px, 85vw);
    z-index: 210;
    transition: left 0.25s ease;
  }
  .layout .sidebar.open { left: 0; }
  .chat-layout .sidebar {
    position: fixed; top: 0; left: -280px; bottom: 0;
    width: min(280px, 85vw);
    z-index: 210;
    transition: left 0.25s ease;
  }
  .chat-layout .sidebar.open { left: 0; }

  .main { padding: calc(12px + env(safe-area-inset-top)) 14px 28px; }

  .chat-header { height: auto; padding: 10px 12px; gap: 8px; }
  .chat-header a.md-button { display: none; }
  .chat-body { padding: 16px 12px; }
  .chat-input-bar { padding: 10px 12px; padding-bottom: calc(10px + env(safe-area-inset-bottom)); }
  .chat-input-bar textarea { font-size: 14px; }
  .message { gap: 8px; margin-bottom: 8px; }
  .message .avatar { width: 30px; height: 30px; font-size: 15px; }
  .message .avatar .material-symbols-outlined { font-size: 15px; }
  .message .bubble { max-width: 86%; padding: 10px 12px; }
  .message .bubble img.attach { max-width: 100%; }

  .form-row { flex-direction: column; gap: 8px; }
  .form-card { margin: 20px auto; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .grid { grid-template-columns: 1fr; }
  .grid .grid-item { grid-column: auto !important; }
  .md-list-item { padding: 12px 12px; gap: 10px; flex-wrap: wrap; }
  .md-list-item .meta { flex-wrap: wrap; }
  .toolbar { gap: 6px; }
  .page-title { gap: 8px; }
  .flash-wrap { top: 12px; right: 12px; left: 12px; }
  .flash { max-width: none; }
  .md-button { padding: 10px 18px; }
  .pagination { flex-wrap: wrap; }
}

@media (min-width: 861px) {
  .menu-btn, .sidebar-mask { display: none !important; }
}

/* ---------- ����ɫ��ѡ�� ---------- */
.theme-swatch { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; padding: 6px 10px; border: 1px solid var(--md-sys-color-outline-variant); border-radius: var(--radius-large); color: var(--md-sys-color-on-surface); }
.theme-swatch:has(input:checked) { border-color: var(--md-sys-color-primary); background: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container); }
.theme-swatch-circle { width: 16px; height: 16px; border-radius: 50%; flex-shrink: 0; border: 1px solid rgba(0,0,0,0.15); }