/* assets/css/style.css */
/* Variables */
:root {
    --hue-color: 200;
    --first-color: hsl(var(--hue-color), 69%, 61%);
    --first-color-second: hsl(var(--hue-color), 69%, 61%);
    --first-color-alt: hsl(var(--hue-color), 57%, 53%);
    --first-color-lighter: hsl(var(--hue-color), 92%, 85%);
    --title-color: hsl(var(--hue-color), 8%, 15%);
    --text-color: hsl(var(--hue-color), 8%, 45%);
    --text-color-light: hsl(var(--hue-color), 8%, 65%);
    --input-color: hsl(var(--hue-color), 70%, 96%);
    --body-color: hsl(var(--hue-color), 60%, 99%);
    --container-color: #fff;
    --scroll-bar-color: hsl(var(--hue-color), 12%, 90%);
    --scroll-thumb-color: hsl(var(--hue-color), 12%, 80%);

    /* Font and typography */
    --body-font: 'Poppins', sans-serif;

    /* 在:root选择器中添加平滑属性 */
    html {
        scroll-behavior: smooth;
    }
}

/* Dark theme */
body.dark-theme {
    --first-color-second: hsl(var(--hue-color), 30%, 8%);
    --title-color: hsl(var(--hue-color), 8%, 95%);
    --text-color: hsl(var(--hue-color), 8%, 75%);
    --input-color: hsl(var(--hue-color), 29%, 16%);
    --body-color: hsl(var(--hue-color), 28%, 12%);
    --container-color: hsl(var(--hue-color), 29%, 16%);
    --scroll-bar-color: hsl(var(--hue-color), 12%, 48%);
    --scroll-thumb-color: hsl(var(--hue-color), 12%, 36%);
}

/* Base */
* {
    box-sizing: border-box;
    padding: 0;
    margin: 0;
}

body {
    font-family: var(--body-font);
    background-color: var(--body-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    transition: .3s;
}

h1, h2, h3, h4 {
    color: var(--title-color);
    font-weight: 600;
}

/* Header */
.header {
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    background-color: var(--body-color);
    box-shadow: 0 1px 4px rgba(0,0,0,.15);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 3.5rem;
    padding: 0 1.5rem;
    max-width: 1024px;
    margin: 0 auto;
}

.nav__logo {
    color: var(--title-color);
    font-weight: 600;
    text-decoration: none;
    font-size: 1.2rem;
}

.nav__btns {
    display: flex;
    align-items: center;
}

.change-theme {
    font-size: 1.25rem;
    color: var(--title-color);
    margin-right: 1rem;
    cursor: pointer;
}

.home__link {
    font-size: 1rem;
    color: var(--first-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    margin-left: 1rem; /* 添加左边距 */
}

.home__link i {
    margin-right: 0.5rem;
}

/* Main content */
.main {
    padding-top: 5rem;
    max-width: 1024px;
    margin: 0 auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

.section {
    padding: 2rem 0 1rem;
}

.section__title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

.section__subtitle {
    display: block;
    font-size: 0.875rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--text-color-light);
}

/* Search form */
.search__form {
    margin-bottom: 2rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
}

.search__input {
    width: 70%;
    padding: 0.75rem;
    border-radius: 0.5rem;
    border: 2px solid var(--input-color);
    background-color: var(--input-color);
    color: var(--text-color);
    font-family: var(--body-font);
    font-size: 0.938rem;
    outline: none;
}

.button {
    display: inline-block;
    background-color: var(--first-color);
    color: #fff;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: .3s;
    font-family: var(--body-font);
}

.button:hover {
    background-color: var(--first-color-alt);
}

/* Cards */
.cards {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.card {
    display: flex;
    align-items: center;
    background-color: var(--container-color);
    padding: 1.25rem;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,.15);
    transition: .3s;
    text-decoration: none;
}

.card:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,.15);
    transform: translateY(-0.25rem);
}

.card img {
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    margin-right: 1rem;
}

.info {
    flex: 1;
}

.title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--title-color);
    display: block;
    margin-bottom: 0.25rem;
}

.description {
    font-size: 0.813rem;
    color: var(--text-color);
}

/* Footer */
.footer {
    padding: 2rem 0;
    margin-top: 2.5rem;
    text-align: center;
}

.footer__copy {
    font-size: 0.75rem;
    color: var(--text-color-light);
}

/* 回到顶部按钮样式 */
.scrolltop {
    position: fixed;
    right: 1rem;
    bottom: -20%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0.5rem;
    background-color: var(--first-color);
    border-radius: 0.5rem;
    z-index: 10;
    transition: .4s;
    opacity: 0.8;
    color: #fff;
    text-decoration: none;
}

.scrolltop:hover {
    opacity: 1;
    transform: translateY(-0.25rem);
}

.scrolltop__icon {
    font-size: 1.5rem;
}

/* 显示回到顶部按钮 */
.show-scroll {
    bottom: 5rem;
}

/* 分区导航样式 */
.section__nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.section__link {
    color: var(--first-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    background-color: var(--container-color);
    transition: .3s;
    box-shadow: 0 1px 2px rgba(0,0,0,.15);
}

.section__link:hover {
    background-color: var(--first-color);
    color: #fff;
    transform: translateY(-0.15rem);
}

/* Media Queries */
@media screen and (max-width: 767px) {
    .cards {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }

    .search__input {
        width: 100%;
    }
}

@media screen and (min-width: 1024px) {
    .main {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}