/* 
 * LunaStudy 全局重置样式
 * 基于现代CSS重置最佳实践
 */

/* 全局基础重置 */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* HTML和Body基础设置 */
html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--ls-text-primary);
    background-color: var(--ls-bg-primary);
    transition: var(--ls-transition);
    min-height: 100vh;
}

/* 移除默认样式 */
h1, h2, h3, h4, h5, h6 {
    margin: 0;
    font-weight: 600;
    line-height: 1.2;
    color: var(--ls-text-primary);
}

p {
    margin: 0;
    color: var(--ls-text-primary);
}

a {
    color: var(--ls-primary);
    text-decoration: none;
    transition: var(--ls-transition-fast);
}

a:hover {
    color: var(--ls-primary-hover);
}

ul, ol {
    list-style: none;
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

button {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
    cursor: pointer;
    border: none;
    background: none;
    padding: 0;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
}

/* 可访问性增强 */
:focus-visible {
    outline: 2px solid var(--ls-primary);
    outline-offset: 2px;
}

/* 打印样式 */
@media print {
    * {
        background: transparent !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
}