/* ========== CSS 变量 ========== */
:root {
    --color-primary: #1890FF;
    --color-primary-hover: #40A9FF;
    --color-primary-active: #096DD9;
    --color-primary-bg: #E6F7FF;
    
    --color-success: #52C41A;
    --color-success-bg: #F6FFED;
    --color-warning: #FAAD14;
    --color-warning-bg: #FFFBE6;
    --color-error: #FF4D4F;
    --color-error-bg: #FFF2F0;
    
    --color-bg-page: #F0F2F5;
    --color-bg-container: #FFFFFF;
    --color-border: #D9D9D9;
    --color-border-light: #F0F0F0;
    
    --color-text-primary: #262626;
    --color-text-secondary: #595959;
    --color-text-tertiary: #8C8C8C;
    
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.03), 0 1px 6px rgba(0,0,0,0.02);
    --shadow-md: 0 3px 6px rgba(0,0,0,0.04), 0 6px 16px rgba(0,0,0,0.08);
    
    --border-radius: 4px;
    --border-radius-lg: 8px;
    
    --transition-base: 0.2s ease-in-out;
}

[data-theme="dark"] {
    --color-primary: #177DDC;
    --color-bg-page: #141414;
    --color-bg-container: #1F1F1F;
    --color-border: #434343;
    --color-border-light: #303030;
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #A6A6A6;
    --color-text-tertiary: #6B6B6B;
}

/* ========== 基础样式 ========== */
html {
    font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--color-text-primary);
    background-color: var(--color-bg-page);
    margin: 0;
    padding: 0;
    margin-bottom: 60px;
}

/* ========== 组件覆盖 ========== */
.btn-primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.card {
    background-color: var(--color-bg-container);
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--color-border-light);
    font-weight: 500;
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

.table {
    --bs-table-bg: var(--color-bg-container);
}

.table thead th {
    background-color: #FAFAFA;
    font-weight: 500;
    color: var(--color-text-secondary);
}

/* ========== 工具类 ========== */
.text-primary { color: var(--color-primary) !important; }
.text-success { color: var(--color-success) !important; }
.text-warning { color: var(--color-warning) !important; }
.text-danger { color: var(--color-error) !important; }

.bg-primary-light { background-color: var(--color-primary-bg) !important; }

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
  color: var(--bs-secondary-color);
  text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
  text-align: start;
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}