@import url('https://fonts.googleapis.com/css2?family=ZCOOL+KuaiLe&display=swap');

:root {
    --paper: #fefce8;
    --surface: #fffdf3;
    --card: #fff;
    --ink: #3d3422;
    --muted: #8a806d;
    --soft: #fff9e6;
    --line: #5a4a32;
    --border: #3d3422;
    --accent: #5ab85a;
    --accent-ink: #fff;
    --accent-soft: #eafff0;
    --warm: #f5ead0;
    --primary-color: var(--accent);
    --radius: 10px;
    --shadow: 3px 3px 0 rgba(61, 52, 34, 0.12);
    --font-body: 'ZCOOL KuaiLe', cursive, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", Consolas, monospace;
}

[data-theme="dark"] {
    --paper: #242018;
    --surface: #30291f;
    --card: #352d22;
    --ink: #f7edcf;
    --muted: #c8b994;
    --soft: #2d281d;
    --line: #ead59b;
    --border: #ead59b;
    --accent: #79c779;
    --accent-ink: #162113;
    --accent-soft: #203522;
    --warm: #443923;
    --shadow: 3px 3px 0 rgba(0, 0, 0, 0.28);
}

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

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--paper);
    background-image:
        radial-gradient(circle at 20% 80%, rgba(255, 200, 100, 0.11) 0%, transparent 46%),
        radial-gradient(circle at 80% 20%, rgba(100, 180, 255, 0.10) 0%, transparent 44%);
    color: var(--ink);
    font-family: var(--font-body);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

::selection {
    background: #e0c86a;
    color: #3d3422;
}

a {
    color: inherit;
}

button {
    font: inherit;
}

.container {
    width: min(100%, 1180px);
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: color-mix(in srgb, var(--paper) 92%, transparent);
    border-bottom: 2px dashed color-mix(in srgb, var(--line) 25%, transparent);
    backdrop-filter: blur(16px);
}

.header .container {
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--shadow);
    transform: rotate(-2deg);
}

.logo-name {
    display: block;
    font-size: 1.12rem;
    line-height: 1.1;
}

.logo-tagline {
    display: block;
    margin-top: 2px;
    color: var(--muted);
    font-size: 0.78rem;
}

.nav,
.posts-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link,
.theme-toggle,
.tag-dropdown-toggle,
.view-toggle,
.back-btn,
.next-btn {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 7px 14px;
    color: var(--ink);
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: 9px;
    box-shadow: 2px 2px 0 rgba(61, 52, 34, 0.12);
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.theme-toggle,
.tag-dropdown-toggle,
.view-toggle {
    width: 42px;
    padding: 0;
}

.nav-link:hover,
.theme-toggle:hover,
.tag-dropdown-toggle:hover,
.view-toggle:hover,
.back-btn:hover,
.next-btn:hover {
    background: var(--warm);
    transform: rotate(-0.6deg) translateY(-1px);
    box-shadow: 3px 3px 0 rgba(61, 52, 34, 0.16);
}

.nav-link.active,
.tag-dropdown-toggle.active {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--ink);
}

.main {
    flex: 1;
    padding: 28px 0 56px;
}

.hero {
    text-align: center;
    margin: 8px 0 34px;
    padding: 8px 0 0;
}

.hero h2 {
    position: relative;
    display: inline-block;
    font-size: clamp(1.9rem, 7vw, 3rem);
    line-height: 1.2;
    margin-bottom: 14px;
}

.hero h2::after {
    content: '';
    display: block;
    width: 72%;
    height: 3px;
    margin: 9px auto 0;
    background: var(--line);
    border-radius: 2px;
    transform: rotate(-0.5deg);
}

.highlight {
    color: var(--accent);
}

.hero p {
    max-width: 620px;
    margin: 0 auto;
    color: var(--muted);
    font-size: 1rem;
}

.hero-content {
    padding: 0 8px;
}

.posts-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
    padding-bottom: 8px;
    border-bottom: 2.5px solid var(--line);
    border-radius: 4px;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
    font-size: 1.35rem;
}

.section-title::before {
    content: '📚';
    font-size: 1.35rem;
}

.section-count {
    color: var(--muted);
    font-size: 0.78rem;
}

.tag-dropdown {
    position: relative;
}

.tag-dropdown-menu {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    z-index: 200;
    width: min(320px, calc(100vw - 28px));
    min-width: 210px;
    display: none;
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px;
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.tag-dropdown-menu.visible {
    display: flex;
}

.tag-dropdown-menu-item,
.post-tag,
.post-list-tag,
.post-detail-tag {
    display: inline-flex;
    align-items: center;
    border: 1.5px solid color-mix(in srgb, currentColor 42%, transparent);
    border-radius: 8px;
    padding: 2px 10px;
    font-size: 0.82rem;
    line-height: 1.5;
}

.tag-dropdown-menu-item {
    cursor: pointer;
    max-width: 100%;
    white-space: nowrap;
}

.tag-dropdown-menu-item.active {
    background: var(--accent);
    color: var(--accent-ink);
    border-color: var(--accent);
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
    gap: 14px;
}

.post-card,
.skeleton-card {
    position: relative;
    min-height: 230px;
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.post-card:nth-child(3n + 1) {
    transform: rotate(-0.25deg);
}

.post-card:nth-child(3n + 2) {
    transform: rotate(0.2deg);
}

.post-card:hover {
    background: var(--surface);
    transform: rotate(-0.35deg) scale(1.005);
    box-shadow: var(--shadow);
}

.post-card:first-child {
    background: var(--accent-soft);
    border-color: var(--accent);
    border-width: 3px;
}

.post-card:first-child::before {
    content: '最近';
    position: absolute;
    top: -11px;
    right: 14px;
    padding: 2px 10px;
    background: var(--accent);
    color: var(--accent-ink);
    border-radius: 6px;
    font-size: 0.72rem;
    transform: rotate(1deg);
}

.post-card-inner {
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 17px 18px;
}

.post-title {
    margin-bottom: 10px;
    color: var(--ink);
    font-size: 1.16rem;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
}

.post-excerpt {
    flex: 1;
    margin-bottom: 14px;
    color: #5f5a4d;
    font-size: 0.93rem;
    line-height: 1.75;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
    overflow: hidden;
}

[data-theme="dark"] .post-excerpt {
    color: var(--muted);
}

.post-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
    padding-top: 12px;
    border-top: 1.5px dashed color-mix(in srgb, var(--line) 30%, transparent);
}

.post-date,
.post-list-date,
.post-detail-date {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--muted);
    font-size: 0.84rem;
}

.posts-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.post-list-item {
    display: grid;
    grid-template-columns: 1fr auto auto;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.post-list-item:hover {
    transform: translateX(3px) rotate(-0.2deg);
    box-shadow: var(--shadow);
}

.post-list-title {
    min-width: 0;
    color: var(--ink);
    font-size: 1rem;
}

.post-list-tag {
    width: fit-content;
    justify-self: start;
}

.post-content {
    max-width: 1180px;
    margin: 0 auto;
    padding: clamp(24px, 4vw, 48px);
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.post-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 18px;
    border-bottom: 2px dashed color-mix(in srgb, var(--line) 25%, transparent);
}

.post-content h1 {
    margin-bottom: 12px;
    color: var(--ink);
    font-size: clamp(1.7rem, 6vw, 2.5rem);
    line-height: 1.25;
}

.post-content h1::after {
    content: '';
    display: block;
    width: min(420px, 70%);
    height: 3px;
    margin: 10px auto 0;
    background: var(--line);
    border-radius: 2px;
    transform: rotate(-0.5deg);
}

.post-detail-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

.post-content h2 {
    margin: 2rem 0 0.8rem;
    padding-bottom: 4px;
    border-bottom: 2px solid var(--line);
    border-radius: 4px;
    font-size: 1.38rem;
}

.post-content h3 {
    margin: 1.6rem 0 0.65rem;
    font-size: 1.18rem;
}

.post-content p {
    margin-bottom: 1.2rem;
    font-size: 1.02rem;
}

.post-content ul,
.post-content ol {
    margin: 1rem 0 1.2rem;
    padding-left: 1.5rem;
}

.post-content li {
    margin: 0.45rem 0;
}

.post-content a {
    color: #667b25;
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
}

[data-theme="dark"] .post-content a {
    color: #c7df7b;
}

.post-content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 24px auto;
    border: 2px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.post-content blockquote {
    margin: 1.5rem 0;
    padding: 12px 18px;
    background: var(--soft);
    border: 2px dashed #e0c86a;
    border-radius: 12px;
    color: var(--ink);
}

.post-content code {
    padding: 0.12em 0.38em;
    background: var(--warm);
    border: 1px solid color-mix(in srgb, var(--line) 28%, transparent);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.9em;
}

.post-content pre {
    margin: 1.5rem 0;
    padding: 16px;
    overflow-x: auto;
    background: #27251f;
    border: 2px solid var(--border);
    border-radius: 10px;
}

.post-content pre code {
    padding: 0;
    color: #f6e7b0;
    background: transparent;
    border: 0;
}

.table-scroll {
    margin: 1.5rem 0;
    max-width: 100%;
    overflow-x: auto;
    border: 2px solid var(--border);
    border-radius: 12px;
    -webkit-overflow-scrolling: touch;
}

.post-content table {
    width: max-content;
    min-width: 100%;
    margin: 0;
    border-collapse: collapse;
    background: var(--card);
}

.post-content th,
.post-content td {
    padding: 9px 12px;
    border-bottom: 1px solid color-mix(in srgb, var(--line) 18%, transparent);
    text-align: left;
    vertical-align: top;
    max-width: min(34rem, 72vw);
    overflow-wrap: anywhere;
    word-break: break-word;
}

.post-content th {
    background: var(--warm);
}

.post-content tr:last-child td {
    border-bottom: 0;
}

.post-content tr:hover td {
    background: color-mix(in srgb, var(--paper) 70%, var(--card));
}

.back-btn,
.next-btn {
    max-width: 100%;
}

.next-btn {
    text-align: left;
}

.comments-section {
    margin-top: 34px;
    padding-top: 24px;
    border-top: 2px dashed color-mix(in srgb, var(--line) 25%, transparent);
}

.comments-header {
    margin-bottom: 16px;
}

.comments-header h2 {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin: 0;
    border-bottom: 0;
    font-size: 1.24rem;
}

.comments-title-icon {
    flex: 0 0 auto;
    color: var(--accent);
}

.giscus-container {
    min-height: 120px;
}

.comments-setup {
    padding: 14px 16px;
    color: var(--muted);
    background: var(--soft);
    border: 2px dashed color-mix(in srgb, var(--line) 30%, transparent);
    border-radius: 10px;
    font-size: 0.92rem;
}

.footer {
    margin-top: auto;
    padding: 24px 0;
    color: var(--muted);
    text-align: center;
    border-top: 2px dashed color-mix(in srgb, var(--line) 20%, transparent);
}

#backToTop {
    width: 48px !important;
    height: 48px !important;
    right: 24px !important;
    bottom: 24px !important;
    background: var(--card) !important;
    color: var(--ink) !important;
    border: 2px solid var(--border) !important;
    border-radius: 10px !important;
    box-shadow: var(--shadow) !important;
}

#backToTop svg {
    stroke: currentColor !important;
}

.skeleton {
    border-radius: 6px;
    background: linear-gradient(90deg, var(--warm) 25%, var(--soft) 50%, var(--warm) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.2s infinite;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

@media (max-width: 700px) {
    .container {
        padding: 0 14px;
    }

    .header .container {
        height: auto;
        min-height: 64px;
        padding-top: 10px;
        padding-bottom: 10px;
    }

    .logo-text {
        display: none;
    }

    .nav-link {
        padding: 7px 10px;
    }

    .posts-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .tag-dropdown-menu {
        right: auto;
        left: 0;
    }

    .post-list-item {
        grid-template-columns: 1fr;
        gap: 6px;
    }

    .post-list-date {
        justify-content: flex-start;
    }
}

@media (max-width: 420px) {
    .header .container {
        gap: 10px;
    }

    .nav {
        gap: 5px;
    }

    .theme-toggle,
    .tag-dropdown-toggle,
    .view-toggle {
        width: 38px;
        min-height: 38px;
    }

    .post-card-inner {
        padding: 15px;
    }
}