:root {
    /* MD3 Colors - Green Theme */
    --md-primary: #2e7d32;
    --md-on-primary: #FFFFFF;
    --md-primary-container: #b8e6b9;
    --md-on-primary-container: #005006;
    --md-secondary: #466c48;
    --md-on-secondary: #FFFFFF;
    --md-surface: #fbfdf7;
    --md-surface-variant: #dde5db;
    --md-on-surface: #191c18;
    --md-on-surface-variant: #414942;
    --md-outline: #727971;
    --md-error: #be3920;
    
    /* Elevation */
    --md-elevation-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.14);
    --md-elevation-2: 0 3px 6px rgba(0,0,0,0.15), 0 2px 4px rgba(0,0,0,0.12);
}

.md3-text-field {
    padding: 12px 16px;
    border-radius: 4px;
    border: 1px solid var(--md-outline);
    background: var(--md-surface);
    color: var(--md-on-surface);
    font-family: Roboto, sans-serif;
    font-size: 16px;
    transition: border-color 0.2s;
}

.md3-text-field:focus {
    outline: none;
    border-color: var(--md-primary);
}

.md3-button {
    padding: 10px 24px;
    border-radius: 20px;
    border: none;
    background: var(--md-primary);
    color: var(--md-on-primary);
    font-family: Roboto, sans-serif;
    font-weight: 500;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.1px;
    cursor: pointer;
    transition: background 0.2s;
    text-decoration: none; /* 添加这一行 */
}

.md3-button:hover {
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
}

.md3-card {
    background: var(--md-surface);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--md-elevation-1);
    transition: box-shadow 0.2s;
}

.md3-card:hover {
    box-shadow: var(--md-elevation-2);
}

.md3-label {
    color: var(--md-on-surface-variant);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
}