:root{
    --bg: #F8EFD4;
    --yellow: #E2BE4E;
    --sage: #A7C796;
    --brown: #6B4F3F;
    --soft-brown: #C69C72;
    --ink: #333333;
    --white: #ffffff;
}

* { box-sizing: border-box; }
html { height: 100%; }
body {
    min-height: 100svh;
    font-family: 'Segoe UI', Tahoma, sans-serif;
    background-color: var(--bg);
    color: var(--ink);
    margin: 0;
    display: flex;
    flex-direction: column;
}

header,
header .nav-bar {
    flex: 0 0 auto;
    background-color: var(--brown);
    color: var(--white);
    border-bottom: 4px solid var(--soft-brown);
}

.nav-bar {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.9rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-title { margin: 0; font-size: 1.6rem; line-height: 1; }
.site-title a { color: var(--white); text-decoration: none; }

nav ul {
    list-style: none; margin: 0; padding: 0; display: flex; gap: 1rem;
}
nav a {
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    padding: 0.4rem 0.5rem;
    border-radius: 6px;
}
nav a:hover { background: rgba(255,255,255,0.12); }

footer {
    flex: 0 0 auto;
    background-color: var(--brown);
    color: var(--white);
    margin-top: 2rem;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.2rem 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

main { flex: 1 0 auto; }

.hello {
    max-width: 1200px;
    margin: 1rem auto;
    background-color: var(--yellow);
    color: var(--white);
    padding: 1rem;
    border-radius: 10px;
}

.layout-3col {
    max-width: 1200px;
    margin: 1rem auto 2rem;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: 240px minmax(540px, 720px) 240px;
    gap: 1.25rem;
}

.sidebar-left, .sidebar-right {
    position: sticky;
    top: 0.75rem;
    align-self: start;
}

.sidebar-right > *:not(:last-child) {
    margin-bottom: 1rem;
}

.sidebar-title {
    margin: 0 0 0.6rem;
    font-size: 1rem;
    color: var(--brown);
}

.category-list {
    list-style: none; margin: 0; padding: 0;
    display: grid; gap: 0.35rem;
}

.category-list a {
    display: block;
    background: var(--bg);
    border-left: 4px solid var(--soft-brown);
    padding: 0.5rem 0.6rem;
    text-decoration: none;
    color: var(--brown);
    border-radius: 6px;
}
.category-list a:hover { background: #f4e7c6; }

.placeholder,
.widget-item {
    background: var(--bg);
    border-left: 4px solid var(--sage);
    padding: 0.75rem;
    border-radius: 6px;
    color: #555;
}

.blog-list.compact {
    display: grid;
    gap: 0.9rem;
}

.post-card {
    background: none;
    border-radius: 10px;
    overflow: hidden;
    border: none;
    box-shadow: none;
}

.post-link { display: block; text-decoration: none; color: inherit; }

.post-titlebar {
    background: var(--brown);
    color: var(--white);
    padding: 0.7rem 0.9rem;
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
}
.post-title {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 700;
}
.post-date {
    opacity: 0.9;
    font-size: 0.85rem;
}

.post-abstract {
    background: #FFF8EA;
    padding: 0.8rem 0.9rem;
    height: 4.8rem;
    overflow: hidden;
    border: 1px solid rgba(0,0,0,0.06);
    border-top: none;
    border-radius: 0 0 10px 10px;
}
.post-abstract p {
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-content {
    background: none;
    border: none;
    box-shadow: none;
    border-radius: 10px;
    overflow: hidden;
}

.post-content .post-titlebar {
    background: var(--brown);
    color: var(--white);
    padding: 0.9rem 1rem;
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
}
.post-content .post-title { margin: 0; font-size: 1.3rem; font-weight: 800; }
.post-content .post-date { opacity: 0.9; font-size: 0.9rem; }

.post-abstract--single {
    background: #FFF8EA;
    padding: 0.8rem 1rem;
    margin: 0;
    border: 1px solid rgba(0,0,0,0.06);
    border-bottom: none;
    border-radius: 0;
}

.post-body {
    background: #FFF8EA;
    padding: 1rem 1.1rem 1.2rem;
    color: #2a1f18;
    line-height: 1.6;
    font-size: 1rem;

    border: 1px solid rgba(0,0,0,0.06);
    border-top: none;
    border-radius: 0 0 10px 10px;
}

.post-body a {
    color: #4a3224;
    text-decoration: underline;
}
.post-body a:hover { color: #2a1f18; }

.post-body h1,
.post-body h2,
.post-body h3,
.post-body h4,
.post-body h5,
.post-body h6 {
    color: #1f150f;
    font-weight: 700;
    margin-top: 1.2rem;
    margin-bottom: 0.6rem;
}
.post-body img { max-width: 100%; height: auto; border-radius: 8px; }
.post-body pre { overflow: auto; padding: 0.75rem; background: #fff7ee; border-radius: 8px; }
.post-body code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; }

.lang-dropdown {
    position: relative;
}

.lang-dropdown .lang-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--brown);
    border-radius: 6px;
    list-style: none;
    padding: 0;
    margin: 0;
    min-width: 100%;
    z-index: 20;
}

.lang-dropdown .lang-menu li a {
    display: block;
    padding: 0.45rem 0.6rem;
    color: var(--white);
    text-decoration: none;
}

.lang-dropdown .lang-menu li a:hover {
    background: rgba(255,255,255,0.12);
}

.lang-dropdown:hover .lang-menu {
    display: block;
}

.category-list a.active {
    background: #f4e7c6;
    border-left-color: var(--brown);
    font-weight: 700;
}
.category-list a.all-link {
    opacity: 0.85;
}
.category-list a.all-link:hover { opacity: 1; }

.muted { opacity: 0.6; }

@media (max-width: 1080px) {
    .layout-3col {
        grid-template-columns: 220px 1fr 220px;
    }
}
@media (max-width: 860px) {
    .layout-3col {
        grid-template-columns: 1fr;
    }
    .sidebar-left, .sidebar-right {
        position: static;
    }
}