/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
    scroll-padding-top: 4rem;
}
::selection {
    background: rgba(187, 154, 247, 0.3);
    color: #c0caf5;
}
body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 17px;
    font-weight: 400;
    line-height: 1.7;
    color: #c0caf5;
    background-color: #1a1b26;
}
p {
    margin-top: 0;
    margin-bottom: 1rem;
}
ul, ol {
    margin-top: 0;
    margin-bottom: 1rem;
}
img {
    max-width: 100%;
    height: auto;
}

/* ===== Layout ===== */
.site-container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ===== Links ===== */
a {
    color: #7aa2f7;
    text-decoration: underline;
    text-decoration-color: transparent;
    text-underline-offset: 3px;
    transition: color 0.2s, text-decoration-color 0.2s;
}
a:hover {
    color: #bb9af7;
    text-decoration-color: #bb9af7;
}

/* ===== Headings ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    position: relative;
}
h1 { font-size: 1.75rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.15rem; }
h4 { font-size: 1rem; }
h5 { font-size: 0.9rem; }

/* ===== Navbar ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1020;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    height: 56px;
    background: rgba(31, 35, 53, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid #3b4261;
}
.navbar-brand-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    flex-shrink: 0;
}
.ncw-logo {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}
.navbar-brand-name {
    color: #c0caf5;
    font-weight: 600;
    font-size: 1.1rem;
    white-space: nowrap;
}
.navbar-toggler {
    display: none;
    background: none;
    border: 1px solid #3b4261;
    color: #c0caf5;
    padding: 0.25rem 0.5rem;
    font-size: 1.25rem;
    cursor: pointer;
    border-radius: 6px;
    line-height: 1;
}
.navbar-toggler-icon {
    display: inline-block;
    width: 1.5em;
    height: 1.5em;
    vertical-align: middle;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23c0caf5' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 100%;
}
.navbar-collapse {
    display: flex;
    align-items: center;
}
.navbar-nav {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 0.25rem;
}
.nav-item {
    position: relative;
}
.nav-link {
    display: block;
    color: #787c99;
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    transition: color 0.2s;
}
.nav-link::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0.75rem;
    right: 0.75rem;
    height: 2px;
    background: #7aa2f7;
    transform: scaleX(0);
    transition: transform 0.2s ease;
}
.nav-link:hover {
    color: #c0caf5;
}
.nav-link:hover::after {
    transform: scaleX(1);
}
@media (max-width: 767.98px) {
    .navbar {
        flex-wrap: wrap;
        height: auto;
        padding: 0.5rem 1rem;
    }
    .navbar-toggler {
        display: block;
    }
    .navbar-collapse {
        display: none;
        flex-basis: 100%;
        width: 100%;
    }
    .navbar-collapse.show {
        display: flex;
    }
    .navbar-nav {
        flex-direction: column;
        width: 100%;
        padding: 0.5rem 0;
    }
    .nav-link::after {
        display: none;
    }
}

/* ===== Dropdowns ===== */
.dropdown-toggle::after {
    display: inline-block;
    margin-left: 0.3em;
    vertical-align: 0.15em;
    content: "";
    border-top: 0.3em solid;
    border-right: 0.3em solid transparent;
    border-left: 0.3em solid transparent;
    opacity: 0.6;
}
.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    min-width: 14rem;
    padding: 0.5rem;
    background-color: #24283b;
    border: 1px solid #3b4261;
    border-radius: 8px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}
.dropdown-menu.show {
    display: block;
}
@media (min-width: 768px) {
    .nav-item.dropdown:hover > .dropdown-menu {
        display: block;
    }
}
@media (max-width: 767.98px) {
    .dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        background-color: transparent;
        padding-left: 1rem;
    }
}
.dropdown-item {
    display: block;
    padding: 0.4rem 0.75rem;
    color: #c0caf5;
    text-decoration: none;
    white-space: nowrap;
    border-radius: 6px;
    font-size: 0.9rem;
    transition: background-color 0.15s;
}
.dropdown-item:hover {
    background-color: rgba(122, 162, 247, 0.1);
    color: #7aa2f7;
}
.dropdown-divider {
    height: 0;
    margin: 0.4rem 0;
    overflow: hidden;
    border-top: 1px solid #3b4261;
}

/* ===== Cards ===== */
.card {
    position: relative;
    display: flex;
    flex-direction: column;
    background-color: #24283b;
    border: 1px solid #3b4261;
    border-radius: 12px;
    margin-top: 0.75rem;
    overflow: hidden;
}
.card-header {
    padding: 0.6rem 1rem;
    background-color: rgba(59, 66, 97, 0.3);
    border-bottom: 1px solid #3b4261;
    font-weight: 600;
    font-size: 0.9rem;
    color: #787c99;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.card-body {
    padding: 0.75rem 1rem;
}
.card.card-body {
    padding: 0.75rem 1rem;
}

/* ===== TOC (inline) ===== */
.toc-inline {
    margin: 1.5rem 0;
}
.toc-inline nav#TableOfContents ul {
    margin: 0;
    padding-left: 1.25rem;
}
.toc-inline nav#TableOfContents > ul {
    padding-left: 0;
    list-style: none;
}
.toc-inline nav#TableOfContents li {
    margin: 0.2rem 0;
}
.toc-inline nav#TableOfContents li > ul {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.3s ease, opacity 0.3s ease;
}
.toc-inline nav#TableOfContents li:hover > ul {
    max-height: 20rem;
    opacity: 1;
}
.toc-inline nav#TableOfContents a {
    color: #787c99;
    font-size: 0.9rem;
}
.toc-inline nav#TableOfContents a:hover {
    color: #7aa2f7;
}

/* ===== Social sharing (horizontal row) ===== */
.share-row {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    padding: 1rem 0;
    margin-top: 2rem;
    border-top: 1px solid #3b4261;
}
.share-row a {
    color: #787c99;
    text-decoration: none;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: color 0.2s;
}
.share-row a:hover {
    color: #7aa2f7;
}

/* ===== Article section list ===== */
.section-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
}
.section-list li {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    padding: 0.5rem 0;
    border-bottom: 1px dotted #3b4261;
}
.section-list li:last-child {
    border-bottom: none;
}
.section-date {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: #9ece6a;
    white-space: nowrap;
    flex-shrink: 0;
}
.section-title a {
    color: #c0caf5;
}
.section-title a:hover {
    color: #7aa2f7;
}

/* ===== Blockquotes ===== */
blockquote {
    display: block;
    background-color: rgba(122, 162, 247, 0.05);
    padding: 0.75rem 1.25rem;
    margin: 1rem 0;
    border-left: 3px solid #7aa2f7;
    border-radius: 0 8px 8px 0;
    color: #a9b1d6;
}
blockquote p:last-child {
    margin-bottom: 0;
}

/* ===== Code ===== */
pre {
    padding: 1rem 1.25rem;
    margin: 1rem 0;
    font-size: 14px;
    line-height: 1.6;
    color: #c0caf5;
    background-color: #1f2335;
    border: none;
    border-left: 3px solid #7aa2f7;
    border-radius: 8px;
    overflow-x: auto;
}
pre code {
    white-space: pre;
    color: inherit;
    background: none;
    padding: 0;
    font-size: inherit;
}
code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85em;
    color: #ff9e64;
    background-color: rgba(255, 158, 100, 0.1);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    word-wrap: break-word;
}

/* ===== Tables ===== */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.95rem;
}
thead td, th {
    padding: 0.5rem 0.75rem;
    font-weight: 600;
    background-color: #1f2335;
    border: 1px solid #3b4261;
    color: #c0caf5;
}
tbody td {
    padding: 0.5rem 0.75rem;
    border: 1px solid #3b4261;
}
tbody tr:nth-child(odd) {
    background-color: #1f2335;
}
tbody tr:nth-child(even) {
    background-color: #24283b;
}

/* ===== Header anchor links ===== */
.header-link {
    position: absolute;
    left: -1.25em;
    opacity: 0;
    transition: opacity 0.2s ease-in-out 0.1s;
    color: #3b4261;
    text-decoration: none;
}
h2:hover .header-link,
h3:hover .header-link,
h4:hover .header-link,
h5:hover .header-link,
h6:hover .header-link {
    opacity: 1;
    color: #7aa2f7;
}

/* ===== Footer ===== */
footer {
    margin-top: 3rem;
    padding: 1.5rem 0;
    border-top: 1px solid #3b4261;
    font-size: 0.85rem;
    color: #787c99;
}
footer a {
    color: #787c99;
}
footer a:hover {
    color: #7aa2f7;
}

/* ===== Utilities ===== */
.float-right {
    float: right;
    margin-left: 1.5rem;
    margin-bottom: 1rem;
    max-width: 18rem;
}
.pre-scrollable {
    max-height: 30rem;
    overflow-y: auto;
}
.heart {
    color: #e31b23;
}

/* ===== Inline SVG icons ===== */
.icon {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: -0.125em;
    fill: currentColor;
}

/* ===== Sidebar shortcode (float-right card) ===== */
.card.float-right {
    max-width: 18rem;
}

/* ===== Dates/meta ===== */
.meta, time {
    color: #9ece6a;
    font-size: 0.9rem;
}

/* ===== Menu (legacy class) ===== */
.menu {
    font-size: 0.9rem;
}

/* ===== Responsive ===== */
@media (max-width: 767.98px) {
    body {
        font-size: 16px;
    }
    .site-container {
        padding: 0 1rem;
    }
    h1 { font-size: 1.5rem; }
    .float-right {
        float: none;
        max-width: 100%;
        margin-left: 0;
    }
    .section-list li {
        flex-direction: column;
        gap: 0.25rem;
    }
}

/* ===== Light mode fallback ===== */
@media (prefers-color-scheme: light) {
    body {
        background-color: #fafaf9;
        color: #1c1917;
    }
    ::selection {
        background: rgba(37, 99, 235, 0.2);
        color: #1c1917;
    }
    a {
        color: #2563eb;
    }
    a:hover {
        color: #1d4ed8;
        text-decoration-color: #1d4ed8;
    }
    .navbar {
        background: rgba(250, 250, 249, 0.85);
        border-bottom-color: #e7e5e4;
    }
    .navbar-brand-name {
        color: #1c1917;
    }
    .navbar-toggler {
        border-color: #e7e5e4;
        color: #1c1917;
    }
    .navbar-toggler-icon {
        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%231c1917' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }
    .nav-link {
        color: #78716c;
    }
    .nav-link:hover {
        color: #1c1917;
    }
    .nav-link::after {
        background: #2563eb;
    }
    .dropdown-menu {
        background-color: #f3f2ef;
        border-color: #e7e5e4;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    }
    .dropdown-item {
        color: #1c1917;
    }
    .dropdown-item:hover {
        background-color: rgba(37, 99, 235, 0.08);
        color: #2563eb;
    }
    .dropdown-divider {
        border-top-color: #e7e5e4;
    }
    .card {
        background-color: #f3f2ef;
        border-color: #e7e5e4;
    }
    .card-header {
        background-color: rgba(231, 229, 228, 0.4);
        border-bottom-color: #e7e5e4;
        color: #78716c;
    }
    .toc-inline nav#TableOfContents a {
        color: #78716c;
    }
    .toc-inline nav#TableOfContents a:hover {
        color: #2563eb;
    }
    .share-row {
        border-top-color: #e7e5e4;
    }
    .share-row a {
        color: #78716c;
    }
    .share-row a:hover {
        color: #2563eb;
    }
    .section-list li {
        border-bottom-color: #e7e5e4;
    }
    .section-title a {
        color: #1c1917;
    }
    .section-title a:hover {
        color: #2563eb;
    }
    blockquote {
        background-color: rgba(37, 99, 235, 0.04);
        border-left-color: #2563eb;
        color: #44403c;
    }
    pre {
        background-color: #f3f2ef;
        border-left-color: #2563eb;
        color: #1c1917;
    }
    code {
        color: #dc2626;
        background-color: rgba(220, 38, 38, 0.08);
    }
    pre code {
        color: inherit;
        background: none;
    }
    thead td, th {
        background-color: #f3f2ef;
        border-color: #e7e5e4;
        color: #1c1917;
    }
    tbody td {
        border-color: #e7e5e4;
    }
    tbody tr:nth-child(odd) {
        background-color: #f3f2ef;
    }
    tbody tr:nth-child(even) {
        background-color: #fafaf9;
    }
    .header-link {
        color: #e7e5e4;
    }
    h2:hover .header-link,
    h3:hover .header-link,
    h4:hover .header-link,
    h5:hover .header-link,
    h6:hover .header-link {
        color: #2563eb;
    }
    footer {
        border-top-color: #e7e5e4;
        color: #78716c;
    }
    footer a {
        color: #78716c;
    }
    footer a:hover {
        color: #2563eb;
    }
    @media (max-width: 767.98px) {
        .dropdown-menu .dropdown-item {
            color: #1c1917;
        }
    }
}

/* Light-mode mobile dropdown overrides (must be outside nested @media) */
@media (prefers-color-scheme: light) and (max-width: 767.98px) {
    .dropdown-menu {
        background-color: transparent;
    }
    .dropdown-menu .dropdown-item {
        color: #44403c;
    }
    .dropdown-menu .dropdown-item:hover {
        color: #2563eb;
        background-color: transparent;
    }
}