:root {
    --bg-top: #f8fbfd;
    --bg-bottom: #ecf1f5;
    --surface: rgba(255, 255, 255, 0.88);
    --surface-solid: #ffffff;
    --surface-soft: rgba(247, 250, 252, 0.95);
    --border: rgba(15, 23, 42, 0.08);
    --text: #17212b;
    --muted: #5d6a79;
    --accent: #176b5a;
    --accent-strong: #0f4f42;
    --accent-soft: #edf7f4;
    --shadow: 0 24px 60px rgba(15, 23, 42, 0.08);
    --shadow-soft: 0 10px 24px rgba(15, 23, 42, 0.06);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    color: var(--text);
    font-family: "Pretendard Variable", "Pretendard", "Noto Sans KR", "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at top left, rgba(23, 107, 90, 0.14), transparent 28rem),
        radial-gradient(circle at top right, rgba(37, 99, 235, 0.10), transparent 24rem),
        linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image: linear-gradient(rgba(255, 255, 255, 0.18) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.18) 1px, transparent 1px);
    background-size: 32px 32px;
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.2), transparent 75%);
}

a {
    color: var(--accent);
    transition: color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

a:hover,
a:focus {
    color: var(--accent-strong);
    text-decoration: none;
}

.container {
    max-width: 1100px;
}

.main {
    min-height: calc(100vh - 220px);
    padding-top: 28px;
    padding-bottom: 24px;
}

.site-nav-shell.navbar {
    margin: 20px auto 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.78);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(16px);
}

.site-nav-shell .container {
    width: 100%;
}

.site-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    height: auto;
    padding: 16px 0;
    color: var(--text) !important;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.site-avatar,
.hero-avatar {
    object-fit: cover;
    border: 1px solid rgba(23, 107, 90, 0.18);
    box-shadow: 0 12px 24px rgba(23, 107, 90, 0.12);
}

.site-avatar {
    width: 40px;
    height: 40px;
    border-radius: 14px;
}

.site-nav-shell .navbar-toggle {
    margin-top: 18px;
    margin-right: 0;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface-solid);
}

.site-nav-shell .navbar-toggle .icon-bar {
    background-color: var(--text);
}

.site-nav-shell .navbar-nav > li {
    min-width: 0;
}

.site-nav-shell .navbar-nav > li > a {
    margin: 11px 0 11px 8px;
    padding: 12px 18px;
    border-radius: 14px;
    color: var(--muted) !important;
    font-weight: 600;
}

.site-nav-shell .navbar-nav > li.active > a,
.site-nav-shell .navbar-nav > li.active > a:hover,
.site-nav-shell .navbar-nav > li.active > a:focus,
.site-nav-shell .navbar-nav > li > a:hover,
.site-nav-shell .navbar-nav > li > a:focus {
    color: var(--accent) !important;
    background: var(--accent-soft);
}

.hero-card,
.section-card,
.article-card,
.comments-card,
.footer-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface);
    box-shadow: var(--shadow);
    backdrop-filter: blur(16px);
}

.hero-card {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 24px;
    overflow: hidden;
    padding: 40px;
    position: relative;
}

.hero-card::after {
    content: "";
    position: absolute;
    right: -80px;
    bottom: -90px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(23, 107, 90, 0.18), transparent 68%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
}

.hero-tag,
.section-label {
    margin: 0 0 12px;
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.hero-copy > :last-child {
    margin-bottom: 0;
}

.hero-copy h1 {
    margin: 0 0 14px;
    font-size: clamp(38px, 7vw, 62px);
    font-weight: 800;
    letter-spacing: -0.05em;
}

.hero-copy p {
    margin: 0;
    max-width: 560px;
    color: var(--muted);
    font-size: 18px;
    line-height: 1.8;
}

.hero-focus {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 22px;
    flex-wrap: wrap;
}

.hero-focus-label {
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.hero-focus-links {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.focus-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 10px 14px;
    border: 1px solid rgba(23, 107, 90, 0.16);
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.focus-chip:hover,
.focus-chip:focus {
    background: var(--accent);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 12px 24px rgba(23, 107, 90, 0.18);
}

.hero-actions {
    display: flex;
    gap: 12px;
    margin-top: 26px;
    flex-wrap: wrap;
}

.tag-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 22px;
}

.tag-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface-solid);
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.tag-chip span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.06);
    color: inherit;
    font-size: 11px;
}

.tag-chip:hover,
.tag-chip:focus {
    color: var(--accent);
    background: var(--accent-soft);
    border-color: rgba(23, 107, 90, 0.18);
}

.tag-chip.is-active {
    color: #fff;
    background: var(--accent);
    border-color: transparent;
    box-shadow: 0 12px 24px rgba(23, 107, 90, 0.18);
}

.tag-chip.is-active span {
    background: rgba(255, 255, 255, 0.18);
}

.button-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 118px;
    padding: 12px 18px;
    border-radius: 999px;
    background: var(--accent);
    color: #fff !important;
    font-weight: 700;
    box-shadow: 0 12px 24px rgba(23, 107, 90, 0.18);
}

.button-link:hover,
.button-link:focus {
    transform: translateY(-1px);
    box-shadow: 0 16px 30px rgba(23, 107, 90, 0.22);
}

.button-link-secondary {
    background: var(--surface-solid);
    color: var(--text) !important;
    border: 1px solid var(--border);
    box-shadow: none;
}

.hero-aside {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 220px;
}

.hero-avatar {
    width: 180px;
    height: 180px;
    border-radius: 36px;
}

.section-card,
.article-card,
.comments-card {
    padding: 28px 30px;
}

.section-card {
    margin-top: 28px;
}

.section-header {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 18px;
}

.section-title {
    margin: 0;
    font-size: 30px;
    font-weight: 700;
    letter-spacing: -0.04em;
}

.section-count {
    color: var(--muted);
    font-weight: 600;
}

.post-list-body {
    display: grid;
    gap: 14px;
}

.post-list-item {
    display: block;
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-soft);
    box-shadow: var(--shadow-soft);
}

.post-list-item:hover,
.post-list-item:focus {
    transform: translateY(-2px);
    box-shadow: 0 18px 36px rgba(15, 23, 42, 0.08);
}

.post-list-meta {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 12px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.post-pill {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
}

.post-list-item h3 {
    margin: 0;
    color: var(--text);
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.content-shell {
    max-width: 860px;
    margin: 0 auto;
}

.content-shell > * + * {
    margin-top: 20px;
}

.page-header h1,
.post-header h1 {
    margin: 0;
    font-size: clamp(32px, 5vw, 46px);
    font-weight: 800;
    letter-spacing: -0.05em;
}

.post-header-meta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin: 12px 0 0;
    color: var(--muted);
    font-weight: 600;
}

.post-header-meta span + span::before {
    content: "•";
    margin-right: 12px;
}

.post-tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.page-content {
    margin-top: 24px;
    font-size: 17px;
    line-height: 1.8;
}

.page-content > :last-child {
    margin-bottom: 0;
}

.page-content h2,
.page-content h3,
.page-content h4 {
    margin-top: 34px;
    margin-bottom: 12px;
    color: var(--text);
    font-weight: 700;
    letter-spacing: -0.03em;
}

.page-content h2 {
    font-size: 30px;
}

.page-content h3 {
    font-size: 24px;
}

.page-content h4 {
    font-size: 20px;
}

.page-content img {
    display: block;
    max-width: 100%;
    margin: 24px auto;
    border-radius: 18px;
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.12);
}

.page-content pre {
    margin: 20px 0;
    padding: 18px 20px;
    overflow: auto;
    border-radius: 18px;
    border: 1px solid rgba(148, 163, 184, 0.16);
    background: linear-gradient(180deg, #0f172a 0%, #111827 100%);
    box-shadow: 0 18px 40px rgba(2, 6, 23, 0.24);
    color: #e5eefc;
}

.page-content pre::-webkit-scrollbar {
    height: 10px;
}

.page-content pre::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: rgba(148, 163, 184, 0.35);
}

.page-content pre code {
    padding: 0;
    font-size: 14px;
    line-height: 1.75;
    font-family: "JetBrains Mono", "Fira Code", "SFMono-Regular", Consolas, monospace;
    background: transparent;
}

.page-content code {
    padding: 2px 6px;
    border-radius: 8px;
    background: rgba(15, 23, 42, 0.06);
    color: var(--accent-strong);
}

.page-content pre code,
.page-content pre .hljs {
    color: #e5eefc;
    background: transparent !important;
}

.page-content .hljs {
    display: block;
    overflow-x: auto;
    padding: 0;
    background: transparent !important;
    color: #e5eefc;
}

.page-content .hljs-comment,
.page-content .hljs-quote {
    color: #94a3b8 !important;
}

.page-content .hljs-keyword,
.page-content .hljs-selector-tag,
.page-content .hljs-title.function_,
.page-content .hljs-built_in {
    color: #7dd3fc !important;
}

.page-content .hljs-string,
.page-content .hljs-attr,
.page-content .hljs-template-variable {
    color: #fde68a !important;
}

.page-content .hljs-number,
.page-content .hljs-literal,
.page-content .hljs-symbol {
    color: #f9a8d4 !important;
}

.page-content .hljs-title,
.page-content .hljs-section,
.page-content .hljs-type {
    color: #86efac !important;
}

.page-content table {
    width: 100%;
    margin: 24px 0;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: var(--surface-solid);
}

.page-content thead {
    background: #e8f0f7;
}

.page-content th,
.page-content td {
    padding: 12px 14px;
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
    vertical-align: top;
}

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

.page-content blockquote {
    margin: 24px 0;
    padding: 18px 20px 18px 22px;
    border-left: 4px solid var(--accent);
    border-radius: 0 18px 18px 0;
    background: var(--accent-soft);
    color: #25403b;
}

.page-content ul,
.page-content ol {
    padding-left: 22px;
}

.toc-list {
    margin: 0 0 28px;
    padding: 18px 22px;
    border: 1px solid rgba(23, 107, 90, 0.12);
    border-radius: 18px;
    background: var(--accent-soft);
}

.toc-list,
.toc-list ul {
    list-style: none;
}

.toc-list > li + li,
.toc-list ul > li + li {
    margin-top: 8px;
}

.toc-list ul {
    padding-left: 16px;
    margin-top: 10px;
}

.comments-card:empty {
    display: none;
}

.comment {
    margin-top: 0;
}

footer {
    margin-top: 40px;
    margin-bottom: 24px;
    color: var(--muted);
}

footer .container {
    display: flex;
    justify-content: flex-end;
}

.footer-card {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 18px;
    width: fit-content;
    max-width: 100%;
    margin-left: auto;
    padding: 24px 28px;
}

.footer-links {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}

.footer-links a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-weight: 600;
}

.icon svg {
    display: inline-block;
    width: 16px;
    height: 16px;
    vertical-align: middle;
}

@media (max-width: 767px) {
    .main {
        padding-top: 18px;
    }

    .site-nav-shell.navbar {
        margin-top: 12px;
        border-radius: 18px;
    }

    .site-nav-shell .navbar-brand {
        padding-left: 15px;
    }

    .site-nav-shell .navbar-nav {
        margin: 0;
        padding: 6px 12px 16px;
    }

    .site-nav-shell .navbar-nav > li > a {
        margin: 4px 0;
    }

    .hero-card,
    .section-card,
    .article-card,
    .comments-card {
        padding: 22px 20px;
        border-radius: 22px;
    }

    .hero-card {
        gap: 16px;
    }

    .hero-copy h1 {
        font-size: 42px;
    }

    .hero-copy p,
    .page-content {
        font-size: 16px;
    }

    .hero-focus {
        gap: 10px;
    }

    .section-header,
    .footer-card {
        flex-direction: column;
        align-items: flex-start;
    }

    footer .container {
        display: block;
    }

    .footer-card {
        width: 100%;
    }

    .tag-filter {
        gap: 8px;
    }

    .tag-chip {
        font-size: 12px;
    }

    .section-title {
        font-size: 24px;
    }

    .post-list-item {
        padding: 20px;
    }

    .post-list-item h3 {
        font-size: 21px;
    }

    .post-header-meta span + span::before {
        margin-right: 8px;
    }
}