/* Material Design 3 Color Tokens - 2024年规范 */
:root {
  /* Primary Colors - 主色系统 */
  --md-sys-color-primary: #6750A4;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #EADDFF;
  --md-sys-color-on-primary-container: #21005D;

  /* Secondary Colors - 辅助色系统 */
  --md-sys-color-secondary: #625B71;
  --md-sys-color-on-secondary: #FFFFFF;
  --md-sys-color-secondary-container: #E8DEF8;
  --md-sys-color-on-secondary-container: #1D192B;

  /* Tertiary Colors - 第三色系统 */
  --md-sys-color-tertiary: #7D5260;
  --md-sys-color-on-tertiary: #FFFFFF;
  --md-sys-color-tertiary-container: #FFD8E4;
  --md-sys-color-on-tertiary-container: #31111D;

  /* Error Colors - 错误色系统 */
  --md-sys-color-error: #BA1A1A;
  --md-sys-color-on-error: #FFFFFF;
  --md-sys-color-error-container: #FFDAD6;
  --md-sys-color-on-error-container: #410002;

  /* Neutral Colors - 中性色系统 */
  --md-sys-color-background: #FFFBFE;
  --md-sys-color-on-background: #1C1B1F;
  --md-sys-color-surface: #FFFBFE;
  --md-sys-color-on-surface: #1C1B1F;
  --md-sys-color-surface-variant: #E7E0EC;
  --md-sys-color-on-surface-variant: #49454F;
  
  /* Outline Colors - 轮廓色 */
  --md-sys-color-outline: #79747E;
  --md-sys-color-outline-variant: #CAC4D0;
  
  /* Additional System Colors */
  --md-sys-color-surface-tint: #6750A4;
  --md-sys-color-inverse-surface: #313033;
  --md-sys-color-inverse-on-surface: #F4EFF4;
  --md-sys-color-inverse-primary: #D0BCFF;
  --md-sys-color-scrim: #000000;
  --md-sys-color-shadow: #000000;

  /* Elevation Shadows */
  --md-sys-elevation-level0: none;
  --md-sys-elevation-level1: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 1px 3px 1px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-level2: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 2px 6px 2px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-level3: 0px 1px 3px 0px rgba(0, 0, 0, 0.3), 0px 4px 8px 3px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-level4: 0px 2px 3px 0px rgba(0, 0, 0, 0.3), 0px 6px 10px 4px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-level5: 0px 4px 4px 0px rgba(0, 0, 0, 0.3), 0px 8px 12px 6px rgba(0, 0, 0, 0.15);

  /* Typography */
  --md-sys-typescale-display-large-font: 'Roboto';
  --md-sys-typescale-display-large-weight: 400;
  --md-sys-typescale-display-large-size: 57px;
  --md-sys-typescale-display-large-line-height: 64px;

  --md-sys-typescale-headline-large-font: 'Roboto';
  --md-sys-typescale-headline-large-weight: 400;
  --md-sys-typescale-headline-large-size: 32px;
  --md-sys-typescale-headline-large-line-height: 40px;

  --md-sys-typescale-title-large-font: 'Roboto';
  --md-sys-typescale-title-large-weight: 400;
  --md-sys-typescale-title-large-size: 22px;
  --md-sys-typescale-title-large-line-height: 28px;

  --md-sys-typescale-body-large-font: 'Roboto';
  --md-sys-typescale-body-large-weight: 400;
  --md-sys-typescale-body-large-size: 16px;
  --md-sys-typescale-body-large-line-height: 24px;

  --md-sys-typescale-label-large-font: 'Roboto';
  --md-sys-typescale-label-large-weight: 500;
  --md-sys-typescale-label-large-size: 14px;
  --md-sys-typescale-label-large-line-height: 20px;

  /* Shape */
  --md-sys-shape-corner-none: 0px;
  --md-sys-shape-corner-extra-small: 4px;
  --md-sys-shape-corner-small: 8px;
  --md-sys-shape-corner-medium: 12px;
  --md-sys-shape-corner-large: 16px;
  --md-sys-shape-corner-extra-large: 28px;
  --md-sys-shape-corner-full: 9999px;
}

/* Dark Mode Color Tokens - Material Design 3 黑暗模式 */
[data-theme="dark"] {
  /* Primary Colors - 主色系统 */
  --md-sys-color-primary: #D0BCFF;
  --md-sys-color-on-primary: #381E72;
  --md-sys-color-primary-container: #4F378B;
  --md-sys-color-on-primary-container: #EADDFF;

  /* Secondary Colors - 辅助色系统 */
  --md-sys-color-secondary: #CCC2DC;
  --md-sys-color-on-secondary: #332D41;
  --md-sys-color-secondary-container: #4A4458;
  --md-sys-color-on-secondary-container: #E8DEF8;

  /* Tertiary Colors - 第三色系统 */
  --md-sys-color-tertiary: #EFB8C8;
  --md-sys-color-on-tertiary: #492532;
  --md-sys-color-tertiary-container: #633B48;
  --md-sys-color-on-tertiary-container: #FFD8E4;

  /* Error Colors - 错误色系统 */
  --md-sys-color-error: #FFB4AB;
  --md-sys-color-on-error: #690005;
  --md-sys-color-error-container: #93000A;
  --md-sys-color-on-error-container: #FFDAD6;

  /* Neutral Colors - 中性色系统 (使用真正的黑色背景) */
  --md-sys-color-background: #000000;
  --md-sys-color-on-background: #E6E1E5;
  --md-sys-color-surface: #000000;
  --md-sys-color-on-surface: #E6E1E5;
  --md-sys-color-surface-variant: #1A1A1A;
  --md-sys-color-on-surface-variant: #CAC4D0;
  
  /* Outline Colors - 轮廓色 */
  --md-sys-color-outline: #938F99;
  --md-sys-color-outline-variant: #49454F;
  
  /* Additional System Colors */
  --md-sys-color-surface-tint: #D0BCFF;
  --md-sys-color-inverse-surface: #E6E1E5;
  --md-sys-color-inverse-on-surface: #313033;
  --md-sys-color-inverse-primary: #6750A4;
  --md-sys-color-scrim: #000000;
  --md-sys-color-shadow: #000000;

  /* Dark Mode Elevation Shadows */
  --md-sys-elevation-level1: 0px 1px 2px 0px rgba(255, 255, 255, 0.1), 0px 1px 3px 1px rgba(255, 255, 255, 0.05);
  --md-sys-elevation-level2: 0px 1px 2px 0px rgba(255, 255, 255, 0.1), 0px 2px 6px 2px rgba(255, 255, 255, 0.05);
  --md-sys-elevation-level3: 0px 1px 3px 0px rgba(255, 255, 255, 0.1), 0px 4px 8px 3px rgba(255, 255, 255, 0.05);
  --md-sys-elevation-level4: 0px 2px 3px 0px rgba(255, 255, 255, 0.1), 0px 6px 10px 4px rgba(255, 255, 255, 0.05);
  --md-sys-elevation-level5: 0px 4px 4px 0px rgba(255, 255, 255, 0.1), 0px 8px 12px 6px rgba(255, 255, 255, 0.05);
}

/* Button Components */
.md-button {
  font-family: var(--md-sys-typescale-label-large-font);
  font-weight: var(--md-sys-typescale-label-large-weight);
  font-size: var(--md-sys-typescale-label-large-size);
  line-height: var(--md-sys-typescale-label-large-line-height);
  padding: 10px 24px;
  border-radius: var(--md-sys-shape-corner-full);
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
  position: relative;
  overflow: hidden;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.md-button.filled {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  box-shadow: var(--md-sys-elevation-level0);
}

.md-button.filled:hover {
  box-shadow: var(--md-sys-elevation-level1);
}

.md-button.outlined {
  background-color: transparent;
  color: var(--md-sys-color-primary);
  border: 1px solid var(--md-sys-color-outline);
}

.md-button.outlined:hover {
  background-color: rgba(103, 80, 164, 0.08);
}

.md-button.text {
  background-color: transparent;
  color: var(--md-sys-color-primary);
}

.md-button.text:hover {
  background-color: rgba(103, 80, 164, 0.08);
}

.md-button.elevated {
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-primary);
  box-shadow: var(--md-sys-elevation-level1);
}

.md-button.elevated:hover {
  box-shadow: var(--md-sys-elevation-level2);
}

.md-button.tonal {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.md-button.tonal:hover {
  box-shadow: var(--md-sys-elevation-level1);
}

/* Card Components */
.md-card {
  border-radius: var(--md-sys-shape-corner-medium);
  padding: 16px;
  transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
  position: relative;
  overflow: hidden;
}

.md-card.filled {
  background-color: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface-variant);
}

.md-card.elevated {
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  box-shadow: var(--md-sys-elevation-level1);
}

.md-card.elevated:hover {
  box-shadow: var(--md-sys-elevation-level2);
}

.md-card.outlined {
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  border: 1px solid var(--md-sys-color-outline-variant);
}

.md-card h3 {
  font-family: var(--md-sys-typescale-title-large-font);
  font-weight: var(--md-sys-typescale-title-large-weight);
  font-size: var(--md-sys-typescale-title-large-size);
  line-height: var(--md-sys-typescale-title-large-line-height);
  margin: 0 0 8px 0;
}

.md-card p {
  font-family: var(--md-sys-typescale-body-large-font);
  font-weight: var(--md-sys-typescale-body-large-weight);
  font-size: var(--md-sys-typescale-body-large-size);
  line-height: var(--md-sys-typescale-body-large-line-height);
  margin: 0 0 16px 0;
  opacity: 0.8;
}

/* Text Field Components */
.md-textfield {
  position: relative;
  margin: 16px 0;
}

.md-textfield input,
.md-textfield textarea {
  width: 100%;
  padding: 16px 16px 16px 16px;
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-corner-small);
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  font-family: var(--md-sys-typescale-body-large-font);
  font-size: var(--md-sys-typescale-body-large-size);
  line-height: var(--md-sys-typescale-body-large-line-height);
  transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
  outline: none;
  box-sizing: border-box;
}

.md-textfield input:focus,
.md-textfield textarea:focus {
  border-color: var(--md-sys-color-primary);
  border-width: 2px;
  padding: 15px 15px 15px 15px;
}

.md-textfield label {
  position: absolute;
  left: 16px;
  top: 16px;
  color: var(--md-sys-color-on-surface-variant);
  font-family: var(--md-sys-typescale-body-large-font);
  font-size: var(--md-sys-typescale-body-large-size);
  transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
  pointer-events: none;
  background-color: var(--md-sys-color-surface);
  padding: 0 4px;
}

.md-textfield input:focus + label,
.md-textfield input:not(:placeholder-shown) + label,
.md-textfield textarea:focus + label,
.md-textfield textarea:not(:placeholder-shown) + label {
  top: -8px;
  left: 12px;
  font-size: 12px;
  color: var(--md-sys-color-primary);
}

.md-textfield textarea {
  resize: vertical;
  min-height: 100px;
}

/* Navigation and Layout */
.app-bar {
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  padding: 16px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--md-sys-shape-corner-full);
  color: var(--md-sys-color-on-surface);
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
}

.nav-item:hover {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.nav-item.active {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

/* Utility Classes */
.surface {
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
}

.primary-container {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.secondary-container {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.tertiary-container {
  background-color: var(--md-sys-color-tertiary-container);
  color: var(--md-sys-color-on-tertiary-container);
}

.error-container {
  background-color: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
}

/* Typography Classes */
.display-large {
  font-family: var(--md-sys-typescale-display-large-font);
  font-weight: var(--md-sys-typescale-display-large-weight);
  font-size: var(--md-sys-typescale-display-large-size);
  line-height: var(--md-sys-typescale-display-large-line-height);
}

.headline-large {
  font-family: var(--md-sys-typescale-headline-large-font);
  font-weight: var(--md-sys-typescale-headline-large-weight);
  font-size: var(--md-sys-typescale-headline-large-size);
  line-height: var(--md-sys-typescale-headline-large-line-height);
}

.title-large {
  font-family: var(--md-sys-typescale-title-large-font);
  font-weight: var(--md-sys-typescale-title-large-weight);
  font-size: var(--md-sys-typescale-title-large-size);
  line-height: var(--md-sys-typescale-title-large-line-height);
}

.body-large {
  font-family: var(--md-sys-typescale-body-large-font);
  font-weight: var(--md-sys-typescale-body-large-weight);
  font-size: var(--md-sys-typescale-body-large-size);
  line-height: var(--md-sys-typescale-body-large-line-height);
}

.label-large {
  font-family: var(--md-sys-typescale-label-large-font);
  font-weight: var(--md-sys-typescale-label-large-weight);
  font-size: var(--md-sys-typescale-label-large-size);
  line-height: var(--md-sys-typescale-label-large-line-height);
}