/* ============================================================
   NIGHT VAULT — MAIN STYLESHEET
   cost-lonne.eu | CSS prefix: nv-
   ============================================================ */

/* Google Fonts — self-hosted via @import from fonts.googleapis.com */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@700&family=Barlow:wght@400;500&family=IBM+Plex+Mono:wght@400&display=swap');

/* ============================================================
   RESET & BASE
   ============================================================ */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--nv-bg);
    color: var(--nv-text-primary);
    font-family: var(--nv-font-body);
    font-weight: 400;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    transition: background-color var(--nv-transition), color var(--nv-transition);
    min-height: 100vh;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--nv-accent);
    text-decoration: none;
    transition: color var(--nv-transition), opacity var(--nv-transition);
}

a:hover {
    opacity: 0.8;
}

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--nv-font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--nv-text-primary);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.15rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.9rem; }

p {
    margin-bottom: var(--nv-space-md);
    color: var(--nv-text-primary);
}

p:last-child {
    margin-bottom: 0;
}

/* ============================================================
   LAYOUT UTILITIES
   ============================================================ */

.nv-container {
    max-width: var(--nv-max-w, 1060px);
    margin: 0 auto;
    padding: 0 24px;
}

.nv-content-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) var(--nv-sidebar-width);
    gap: var(--nv-space-2xl);
    align-items: start;
}

.nv-content-main {
    min-width: 0;
}

.nv-screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

/* ============================================================
   HEADER
   ============================================================ */

.nv-header {
    background: var(--nv-surface);
    border-bottom: 1px solid var(--nv-border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
    transition: background-color var(--nv-transition), border-color var(--nv-transition);
}

.nv-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 24px;
}

/* Logo */
.nv-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}

.nv-logo-icon {
    width: 34px;
    height: 34px;
    flex-shrink: 0;
}

.nv-logo-wordmark {
    font-family: var(--nv-font-head, var(--nv-font-heading));
    font-weight: 700;
    font-size: 18px;
    letter-spacing: -0.02em;
    color: var(--nv-highlight);
    line-height: 1;
}

.nv-logo-dot {
    color: var(--nv-accent);
}

.nv-logo-sub {
    display: block;
    font-family: var(--nv-font-mono);
    font-size: 9px;
    font-weight: 400;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--nv-accent);
    margin-top: 2px;
}

/* Primary Navigation */
.nv-nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nv-nav-list {
    display: flex;
    align-items: center;
    gap: var(--nv-space-xs);
    list-style: none;
}

.nv-nav-list a {
    display: block;
    padding: 8px 14px;
    font-family: var(--nv-font-body);
    font-size: 13.5px;
    font-weight: 500;
    color: var(--nv-text-secondary);
    text-decoration: none;
    border-radius: var(--nv-radius);
    transition: color 0.15s, background 0.15s;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

.nv-nav-list a:hover,
.nv-nav-list .current-menu-item > a,
.nv-nav-list .current-menu-ancestor > a {
    color: var(--nv-text-primary);
    background: rgba(74, 158, 223, 0.08);
}

.nv-nav-list .current-menu-item > a,
.nv-nav-list .current-menu-ancestor > a {
    color: var(--nv-accent);
}

/* Header actions */
.nv-header-actions {
    display: flex;
    align-items: center;
    gap: var(--nv-space-sm);
    flex-shrink: 0;
}

/* Theme Toggle — pill shape per mockup */
.nv-theme-toggle {
    background: var(--nv-accent-dim);
    border: 1px solid var(--nv-border-accent);
    border-radius: 20px;
    color: var(--nv-accent);
    cursor: pointer;
    font-size: 16px;
    padding: 6px 12px;
    transition: background 0.2s, border-color 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nv-theme-toggle:hover {
    background: var(--nv-accent-dim);
    border-color: var(--nv-accent);
}

.nv-theme-toggle svg {
    width: 16px;
    height: 16px;
}

/* Search toggle */
.nv-search-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: var(--nv-radius-md);
    border: 1px solid var(--nv-border);
    background-color: var(--nv-surface-2);
    color: var(--nv-text-secondary);
    transition: background-color var(--nv-transition), border-color var(--nv-transition);
}

.nv-search-toggle:hover {
    background-color: var(--nv-accent-dim);
    border-color: var(--nv-accent);
}

.nv-search-toggle svg {
    width: 16px;
    height: 16px;
}

/* Mobile nav toggle */
.nv-nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: var(--nv-radius-md);
    border: 1px solid var(--nv-border);
    background-color: var(--nv-surface-2);
    color: var(--nv-text-secondary);
}

/* ============================================================
   FOOTER
   ============================================================ */

/* Footer — mockup style (single row) */
.nv-footer {
    background: var(--nv-surface);
    border-top: 1px solid var(--nv-border);
    padding: 32px 0;
}

.nv-footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.nv-footer-copy {
    font-family: var(--nv-font-mono);
    font-size: 11px;
    color: var(--nv-text-secondary);
    letter-spacing: 0.04em;
}

.nv-footer-links {
    display: flex;
    gap: 20px;
    list-style: none;
}

.nv-footer-links a {
    font-family: var(--nv-font-mono);
    font-size: 11px;
    color: var(--nv-text-secondary);
    text-decoration: none;
    letter-spacing: 0.04em;
    transition: color 0.15s;
}

.nv-footer-links a:hover {
    color: var(--nv-accent);
    opacity: 1;
}

/* ============================================================
   HERO — removed old centered styles, mockup styles below
   ============================================================ */

/* ============================================================
   BUTTONS — base class for non-homepage contexts
   ============================================================ */

.nv-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 22px;
    border-radius: var(--nv-radius);
    font-family: var(--nv-font-body);
    font-size: 14px;
    font-weight: 500;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
}

.nv-btn-secondary {
    background: transparent;
    color: var(--nv-text-primary);
    border-color: var(--nv-border);
}

.nv-btn-secondary:hover {
    background: var(--nv-accent-dim);
    border-color: var(--nv-accent);
    color: var(--nv-accent);
}

/* ============================================================
   CARDS
   ============================================================ */

.nv-card {
    background: var(--nv-surface);
    border: 1px solid var(--nv-border);
    border-radius: var(--nv-radius);
    overflow: hidden;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 0 20px rgba(74, 158, 223, 0.06);
}

.nv-card:hover {
    border-color: var(--nv-border-accent);
    box-shadow: 0 0 28px rgba(74, 158, 223, 0.14);
}

.nv-card-body {
    padding: 20px 22px 24px;
}

.nv-card-body .nv-chip {
    margin-bottom: 12px;
}

.nv-card-meta {
    font-family: var(--nv-font-mono);
    font-size: 11px;
    color: var(--nv-text-secondary);
    letter-spacing: 0.04em;
    display: flex;
    align-items: center;
    gap: 12px;
}

.nv-card-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.nv-card-category {
    font-family: var(--nv-font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--nv-accent);
    text-decoration: none;
}

.nv-card-category:hover {
    opacity: 0.75;
}

.nv-card-date {
    font-family: var(--nv-font-mono);
    font-size: 0.7rem;
    color: var(--nv-text-secondary);
}

.nv-card h3 {
    font-size: 1.1rem;
    margin-bottom: var(--nv-space-sm);
}

.nv-card h3 a {
    color: var(--nv-text-primary);
    text-decoration: none;
    transition: color var(--nv-transition);
}

.nv-card h3 a:hover {
    color: var(--nv-accent);
    opacity: 1;
}

.nv-card-excerpt {
    font-size: 14px;
    color: var(--nv-text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============================================================
   ARTICLE GRID
   ============================================================ */

.nv-article-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--nv-space-lg);
}

.nv-article-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.nv-article-grid .nv-card:first-child {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.nv-article-grid .nv-card:first-child .nv-card-img {
    aspect-ratio: auto;
    height: 100%;
}

/* ============================================================
   SILO NAVIGATION (Homepage)
   ============================================================ */

.nv-silo-nav {
    padding-block: var(--nv-space-2xl);
}

.nv-silo-nav-heading {
    font-size: 0.75rem;
    font-family: var(--nv-font-mono);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--nv-text-secondary);
    margin-bottom: var(--nv-space-lg);
}

.nv-silo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--nv-space-md);
}

.nv-silo-item {
    background-color: var(--nv-surface);
    border: 1px solid var(--nv-border);
    border-radius: var(--nv-radius-lg);
    padding: var(--nv-space-lg);
    text-decoration: none;
    display: flex;
    flex-direction: column;
    gap: var(--nv-space-sm);
    transition: border-color var(--nv-transition), background-color var(--nv-transition), transform 150ms ease;
}

.nv-silo-item:hover {
    border-color: var(--nv-accent);
    background-color: var(--nv-accent-dim);
    transform: translateY(-2px);
    opacity: 1;
}

.nv-silo-icon {
    font-size: 1.5rem;
    line-height: 1;
}

.nv-silo-item h3 {
    font-size: 0.95rem;
    color: var(--nv-text-primary);
    margin: 0;
}

.nv-silo-item p {
    font-size: 0.82rem;
    color: var(--nv-text-secondary);
    margin: 0;
    line-height: 1.5;
}

/* ============================================================
   SECTION HEADERS
   ============================================================ */

.nv-section {
    padding: 60px 0;
}

.nv-section-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 32px;
    gap: 16px;
}

/* ============================================================
   BREADCRUMB
   ============================================================ */

.nv-breadcrumb {
    padding-block: var(--nv-space-md);
    border-bottom: 1px solid var(--nv-border);
    margin-bottom: var(--nv-space-xl);
}

.nv-breadcrumb-list {
    display: flex;
    align-items: center;
    gap: var(--nv-space-xs);
    flex-wrap: wrap;
    list-style: none;
}

.nv-breadcrumb-list li {
    display: flex;
    align-items: center;
    gap: var(--nv-space-xs);
}

.nv-breadcrumb-list li:not(:last-child)::after {
    content: '/';
    color: var(--nv-border);
    font-size: 0.75rem;
}

.nv-breadcrumb-list a {
    font-family: var(--nv-font-mono);
    font-size: 0.75rem;
    color: var(--nv-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.nv-breadcrumb-list a:hover {
    color: var(--nv-accent);
    opacity: 1;
}

.nv-breadcrumb-list li:last-child span {
    font-family: var(--nv-font-mono);
    font-size: 0.75rem;
    color: var(--nv-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================================
   SINGLE ARTICLE
   ============================================================ */

.nv-article-header {
    margin-bottom: var(--nv-space-2xl);
}

.nv-article-header .nv-card-meta {
    margin-bottom: var(--nv-space-lg);
}

.nv-article-header h1 {
    margin-bottom: var(--nv-space-lg);
}

.nv-article-bluf {
    background-color: var(--nv-surface);
    border-left: 3px solid var(--nv-accent);
    border-radius: 0 var(--nv-radius-md) var(--nv-radius-md) 0;
    padding: var(--nv-space-lg) var(--nv-space-xl);
    margin-bottom: var(--nv-space-xl);
}

.nv-article-bluf p {
    font-size: 1.05rem;
    color: var(--nv-text-secondary);
    font-weight: 500;
    margin: 0;
    line-height: 1.65;
}

/* Article body prose */
.nv-article-body {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--nv-text-primary);
}

.nv-article-body h2 {
    margin-top: var(--nv-space-2xl);
    margin-bottom: var(--nv-space-md);
    padding-bottom: var(--nv-space-sm);
    border-bottom: 1px solid var(--nv-border);
}

.nv-article-body h3 {
    margin-top: var(--nv-space-xl);
    margin-bottom: var(--nv-space-sm);
}

.nv-article-body h4 {
    margin-top: var(--nv-space-lg);
    margin-bottom: var(--nv-space-sm);
}

.nv-article-body p {
    margin-bottom: var(--nv-space-md);
}

.nv-article-body ul,
.nv-article-body ol {
    list-style: revert;
    padding-left: 1.5rem;
    margin-bottom: var(--nv-space-md);
}

.nv-article-body li {
    margin-bottom: var(--nv-space-xs);
    color: var(--nv-text-primary);
}

.nv-article-body blockquote {
    border-left: 3px solid var(--nv-accent);
    background-color: var(--nv-surface);
    padding: var(--nv-space-md) var(--nv-space-lg);
    margin: var(--nv-space-xl) 0;
    border-radius: 0 var(--nv-radius-sm) var(--nv-radius-sm) 0;
    font-style: italic;
    color: var(--nv-text-secondary);
}

.nv-article-body code {
    font-family: var(--nv-font-mono);
    font-size: 0.85em;
    background-color: var(--nv-surface-2);
    padding: 0.15em 0.4em;
    border-radius: var(--nv-radius-sm);
    color: var(--nv-highlight);
}

.nv-article-body pre {
    background-color: var(--nv-surface);
    border: 1px solid var(--nv-border);
    border-radius: var(--nv-radius-md);
    padding: var(--nv-space-lg);
    overflow-x: auto;
    margin-block: var(--nv-space-lg);
}

.nv-article-body pre code {
    background: none;
    padding: 0;
    font-size: 0.875rem;
    color: var(--nv-text-primary);
}

.nv-article-body a {
    color: var(--nv-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.nv-article-body img {
    border-radius: var(--nv-radius-md);
    margin-block: var(--nv-space-lg);
}

.nv-article-body table {
    width: 100%;
    border-collapse: collapse;
    margin-block: var(--nv-space-lg);
    font-size: 0.9rem;
}

.nv-article-body th,
.nv-article-body td {
    padding: var(--nv-space-sm) var(--nv-space-md);
    border: 1px solid var(--nv-border);
    text-align: left;
}

.nv-article-body th {
    background-color: var(--nv-surface-2);
    font-family: var(--nv-font-heading);
    font-size: 0.85rem;
}

/* Reading time / meta bar */
.nv-article-meta-bar {
    display: flex;
    align-items: center;
    gap: var(--nv-space-lg);
    padding-block: var(--nv-space-md);
    border-top: 1px solid var(--nv-border);
    border-bottom: 1px solid var(--nv-border);
    margin-bottom: var(--nv-space-xl);
    flex-wrap: wrap;
}

.nv-article-meta-bar span {
    font-family: var(--nv-font-mono);
    font-size: 0.75rem;
    color: var(--nv-text-secondary);
    display: flex;
    align-items: center;
    gap: var(--nv-space-xs);
}

/* ============================================================
   AUTHOR BOX
   ============================================================ */

.nv-author-box {
    background-color: var(--nv-surface);
    border: 1px solid var(--nv-border);
    border-radius: var(--nv-radius-lg);
    padding: var(--nv-space-xl);
    display: grid;
    grid-template-columns: 72px 1fr;
    gap: var(--nv-space-lg);
    align-items: start;
    margin-block: var(--nv-space-2xl);
}

.nv-author-avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: cover;
    background-color: var(--nv-surface-2);
    border: 2px solid var(--nv-border);
}

.nv-author-avatar-placeholder {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background-color: var(--nv-surface-2);
    border: 2px solid var(--nv-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--nv-font-heading);
    font-size: 1.5rem;
    color: var(--nv-accent);
}

.nv-author-info-name {
    font-family: var(--nv-font-heading);
    font-size: 1rem;
    font-weight: 700;
    color: var(--nv-text-primary);
    margin-bottom: var(--nv-space-xs);
}

.nv-author-info-title {
    font-family: var(--nv-font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--nv-accent);
    margin-bottom: var(--nv-space-sm);
}

.nv-author-info-bio {
    font-size: 0.9rem;
    color: var(--nv-text-secondary);
    line-height: 1.65;
    margin: 0;
}

/* ============================================================
   RELATED ARTICLES
   ============================================================ */

.nv-related {
    margin-top: var(--nv-space-2xl);
    padding-top: var(--nv-space-xl);
    border-top: 1px solid var(--nv-border);
}

.nv-related h3 {
    margin-bottom: var(--nv-space-lg);
    font-size: 1.1rem;
    color: var(--nv-text-secondary);
    font-family: var(--nv-font-mono);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.75rem;
}

.nv-related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--nv-space-md);
}

/* ============================================================
   SIDEBAR
   ============================================================ */

.nv-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--nv-space-lg);
    position: sticky;
    top: calc(60px + var(--nv-space-lg));
}

.nv-widget {
    background-color: var(--nv-surface);
    border: 1px solid var(--nv-border);
    border-radius: var(--nv-radius-lg);
    padding: var(--nv-space-lg);
}

.nv-widget-title {
    font-family: var(--nv-font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--nv-text-secondary);
    padding-bottom: var(--nv-space-sm);
    border-bottom: 1px solid var(--nv-border);
    margin-bottom: var(--nv-space-md);
}

.nv-widget-nav li {
    border-bottom: 1px solid var(--nv-border);
}

.nv-widget-nav li:last-child {
    border-bottom: none;
}

.nv-widget-nav a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-block: var(--nv-space-sm);
    font-size: 0.875rem;
    color: var(--nv-text-secondary);
    transition: color var(--nv-transition);
}

.nv-widget-nav a:hover {
    color: var(--nv-accent);
    opacity: 1;
}

/* ============================================================
   ARCHIVE PAGE
   ============================================================ */

.nv-archive-header {
    padding-block: var(--nv-space-2xl);
    border-bottom: 1px solid var(--nv-border);
    margin-bottom: var(--nv-space-xl);
}

.nv-archive-header h1 {
    margin-bottom: var(--nv-space-sm);
}

.nv-archive-description {
    color: var(--nv-text-secondary);
    font-size: 1rem;
    max-width: 640px;
    margin: 0;
}

.nv-archive-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--nv-space-lg);
}

.nv-archive-grid .nv-card h2 {
    font-size: 1.05rem;
    line-height: 1.3;
    margin-bottom: var(--nv-space-sm);
}

.nv-archive-grid .nv-card h2 a {
    color: var(--nv-text-primary);
    text-decoration: none;
    transition: color var(--nv-transition);
}

.nv-archive-grid .nv-card h2 a:hover {
    color: var(--nv-accent);
    opacity: 1;
}

/* ============================================================
   PAGINATION
   ============================================================ */

.nv-pagination {
    display: flex;
    justify-content: center;
    gap: var(--nv-space-sm);
    margin-top: var(--nv-space-2xl);
    padding-top: var(--nv-space-xl);
    border-top: 1px solid var(--nv-border);
}

.nv-pagination a,
.nv-pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding-inline: var(--nv-space-sm);
    border: 1px solid var(--nv-border);
    border-radius: var(--nv-radius-md);
    font-family: var(--nv-font-mono);
    font-size: 0.85rem;
    color: var(--nv-text-secondary);
    transition: border-color var(--nv-transition), color var(--nv-transition), background-color var(--nv-transition);
}

.nv-pagination a:hover {
    border-color: var(--nv-accent);
    color: var(--nv-accent);
    background-color: var(--nv-accent-dim);
    opacity: 1;
}

.nv-pagination .current {
    background-color: var(--nv-accent);
    border-color: var(--nv-accent);
    color: #FFFFFF;
}

/* ============================================================
   SEARCH FORM
   ============================================================ */

.nv-search-form {
    display: flex;
    gap: var(--nv-space-sm);
}

.nv-search-input {
    flex: 1;
    padding: 0.625rem var(--nv-space-md);
    background-color: var(--nv-bg);
    border: 1px solid var(--nv-border);
    border-radius: var(--nv-radius-md);
    color: var(--nv-text-primary);
    font-family: var(--nv-font-body);
    font-size: 0.9rem;
    transition: border-color var(--nv-transition);
    outline: none;
}

.nv-search-input::placeholder {
    color: var(--nv-text-secondary);
}

.nv-search-input:focus {
    border-color: var(--nv-accent);
}

.nv-search-btn {
    padding: 0.625rem var(--nv-space-md);
    background-color: var(--nv-accent);
    border: 1px solid var(--nv-accent);
    border-radius: var(--nv-radius-md);
    color: #FFFFFF;
    font-size: 0.9rem;
    font-family: var(--nv-font-body);
    font-weight: 500;
    cursor: pointer;
    transition: opacity var(--nv-transition);
}

.nv-search-btn:hover {
    opacity: 0.85;
}

/* ============================================================
   PAGE TEMPLATES
   ============================================================ */

.nv-page-header {
    padding-block: var(--nv-space-2xl);
    border-bottom: 1px solid var(--nv-border);
    margin-bottom: var(--nv-space-2xl);
}

.nv-page-header h1 {
    margin-bottom: var(--nv-space-sm);
}

.nv-page-body {
    max-width: var(--nv-content-width);
}

.nv-page-body h2 {
    margin-top: var(--nv-space-2xl);
    margin-bottom: var(--nv-space-md);
}

.nv-page-body h3 {
    margin-top: var(--nv-space-xl);
    margin-bottom: var(--nv-space-sm);
}

.nv-page-body p {
    margin-bottom: var(--nv-space-md);
    color: var(--nv-text-primary);
    line-height: 1.8;
}

.nv-page-body ul,
.nv-page-body ol {
    list-style: revert;
    padding-left: 1.5rem;
    margin-bottom: var(--nv-space-md);
}

.nv-page-body li {
    margin-bottom: var(--nv-space-xs);
}

.nv-page-body a {
    color: var(--nv-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* About page */
.nv-about-intro {
    font-size: 1.1rem;
    color: var(--nv-text-secondary);
    line-height: 1.75;
    margin-bottom: var(--nv-space-2xl);
    padding-bottom: var(--nv-space-2xl);
    border-bottom: 1px solid var(--nv-border);
}

.nv-about-section {
    margin-bottom: var(--nv-space-2xl);
}

.nv-about-highlight {
    background-color: var(--nv-surface);
    border: 1px solid var(--nv-border);
    border-left: 3px solid var(--nv-accent);
    border-radius: 0 var(--nv-radius-md) var(--nv-radius-md) 0;
    padding: var(--nv-space-lg) var(--nv-space-xl);
    margin-block: var(--nv-space-xl);
}

/* Privacy page */
.nv-privacy-section {
    margin-bottom: var(--nv-space-2xl);
}

.nv-privacy-section h2 {
    font-size: 1.25rem;
    margin-bottom: var(--nv-space-md);
    padding-bottom: var(--nv-space-sm);
    border-bottom: 1px solid var(--nv-border);
}

/* ============================================================
   404 PAGE
   ============================================================ */

.nv-404 {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-block: var(--nv-space-3xl);
}

.nv-404-code {
    font-family: var(--nv-font-mono);
    font-size: clamp(5rem, 15vw, 10rem);
    font-weight: 400;
    color: var(--nv-border);
    line-height: 1;
    margin-bottom: var(--nv-space-lg);
    user-select: none;
}

.nv-404 h1 {
    margin-bottom: var(--nv-space-md);
}

.nv-404 p {
    color: var(--nv-text-secondary);
    max-width: 480px;
    margin-bottom: var(--nv-space-xl);
}

/* ============================================================
   DATA LABELS / TAGS
   ============================================================ */

.nv-tag {
    display: inline-flex;
    font-family: var(--nv-font-mono);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--nv-text-secondary);
    background-color: var(--nv-surface-2);
    border: 1px solid var(--nv-border);
    border-radius: var(--nv-radius-sm);
    padding: 0.2em 0.55em;
    text-decoration: none;
    transition: color var(--nv-transition), border-color var(--nv-transition);
}

.nv-tag:hover {
    color: var(--nv-accent);
    border-color: var(--nv-accent);
    background-color: var(--nv-accent-dim);
    opacity: 1;
}

/* ============================================================
   STAT / DATA CALLOUT
   ============================================================ */

.nv-stat-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--nv-space-md);
    margin-block: var(--nv-space-xl);
}

.nv-stat {
    background-color: var(--nv-surface);
    border: 1px solid var(--nv-border);
    border-radius: var(--nv-radius-md);
    padding: var(--nv-space-lg);
    text-align: center;
}

.nv-stat-value {
    font-family: var(--nv-font-heading);
    font-size: 2rem;
    color: var(--nv-accent);
    line-height: 1;
    margin-bottom: var(--nv-space-xs);
}

.nv-stat-label {
    font-size: 0.82rem;
    color: var(--nv-text-secondary);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1024px) {
    .nv-content-wrap {
        grid-template-columns: 1fr;
    }
    .nv-sidebar {
        position: static;
    }
    .nv-article-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .nv-article-grid .nv-card:first-child {
        grid-column: 1 / -1;
        display: block;
    }
    .nv-silo-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nv-container {
        padding: 0 16px;
    }
    .nv-nav {
        display: none;
    }
    .nv-nav.is-open {
        display: flex;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--nv-surface);
        border-bottom: 1px solid var(--nv-border);
        padding: var(--nv-space-md);
        z-index: 99;
    }
    .nv-nav.is-open .nv-nav-list {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
    }
    .nv-nav-toggle {
        display: flex;
    }
    .nv-header {
        position: relative;
    }
    .nv-article-grid {
        grid-template-columns: 1fr;
    }
    .nv-silo-grid {
        grid-template-columns: 1fr;
    }
    .nv-archive-grid {
        grid-template-columns: 1fr;
    }
    .nv-related-grid {
        grid-template-columns: 1fr;
    }
    .nv-author-box {
        grid-template-columns: 1fr;
    }
    .nv-stat-row {
        grid-template-columns: 1fr;
    }
    .nv-footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .nv-hero-actions {
        flex-direction: column;
        align-items: center;
    }
    .nv-hero-actions .nv-btn {
        width: 100%;
        justify-content: center;
    }
}

/* ============================================================
   HOMEPAGE — MOCKUP CLASSES (appended to match mockup_a_night-vault.html)
   ============================================================ */

/* Hero layout overrides for homepage */
.nv-hero {
    position: relative;
    padding: 80px 0 72px;
    overflow: hidden;
}

.nv-hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 70% 60% at 60% 50%, rgba(74, 158, 223, 0.07) 0%, transparent 70%),
        radial-gradient(ellipse 40% 40% at 20% 30%, rgba(100, 149, 237, 0.05) 0%, transparent 60%),
        radial-gradient(ellipse 30% 50% at 85% 70%, rgba(30, 46, 74, 0.6) 0%, transparent 70%),
        linear-gradient(175deg, #0F1629 0%, #080C18 100%);
    z-index: 0;
}

/* Star field */
.nv-stars {
    position: absolute;
    inset: 0;
    z-index: 1;
    overflow: hidden;
}

.nv-star {
    position: absolute;
    background: #E8EDF8;
    border-radius: 50%;
    animation: nv-twinkle 3s ease-in-out infinite;
}

@keyframes nv-twinkle {
    0%, 100% { opacity: 0.2; }
    50%       { opacity: 0.9; }
}

.nv-hero-content {
    position: relative;
    z-index: 2;
    max-width: 680px;
}

.nv-hero-eyebrow {
    font-family: var(--nv-font-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--nv-accent);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nv-hero-eyebrow::after {
    content: '';
    display: block;
    width: 40px;
    height: 1px;
    background: var(--nv-accent);
    opacity: 0.5;
}

.nv-hero-title {
    font-family: var(--nv-font-head), var(--nv-font-heading), sans-serif;
    font-size: clamp(34px, 5vw, 54px);
    font-weight: 700;
    line-height: 1.12;
    letter-spacing: -0.025em;
    color: var(--nv-highlight);
    margin-bottom: 22px;
}

.nv-hero-title em {
    font-style: normal;
    color: var(--nv-accent);
}

.nv-hero-lead {
    font-size: 17px;
    color: var(--nv-text-secondary);
    line-height: 1.7;
    max-width: 560px;
    margin-bottom: 32px;
}

/* Hero actions (override centered default) */
.nv-hero .nv-hero-actions {
    justify-content: flex-start;
}

/* Buttons — mockup variant (standalone, not requiring .nv-btn base) */
.nv-btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--nv-accent);
    color: #080C18;
    font-family: var(--nv-font-body);
    font-weight: 600;
    font-size: 14px;
    padding: 11px 22px;
    border-radius: var(--nv-radius);
    text-decoration: none;
    letter-spacing: 0.01em;
    transition: background 0.15s, transform 0.1s;
    border: none;
}

.nv-btn-primary:hover {
    background: #6BB3E8;
    transform: translateY(-1px);
    opacity: 1;
    color: #080C18;
}

.nv-btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--nv-text-secondary);
    font-family: var(--nv-font-body);
    font-weight: 500;
    font-size: 14px;
    padding: 11px 0;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: color 0.15s, border-color 0.15s;
    background: transparent;
    border-top: none;
    border-left: none;
    border-right: none;
    border-radius: 0;
}

.nv-btn-ghost:hover {
    color: var(--nv-text-primary);
    border-bottom-color: var(--nv-border);
    opacity: 1;
}

/* Hero stat strip */
.nv-hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--nv-border);
    flex-wrap: nowrap;
    overflow-x: auto;
}

.nv-stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
    text-align: left;
}

.nv-stat-value {
    font-family: var(--nv-font-head), var(--nv-font-heading), sans-serif;
    font-size: 26px;
    font-weight: 700;
    color: var(--nv-highlight);
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 0;
}

.nv-stat-label {
    font-family: var(--nv-font-mono);
    font-size: 10px;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--nv-text-secondary);
}

.nv-stat-sep {
    width: 1px;
    height: 32px;
    background: var(--nv-border);
    flex-shrink: 0;
}

/* Section header — mockup style */
.nv-section-title {
    font-family: var(--nv-font-head), var(--nv-font-heading), sans-serif;
    font-size: 22px;
    font-weight: 700;
    color: var(--nv-highlight);
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 12px;
}

.nv-section-title::before {
    content: '';
    display: block;
    width: 3px;
    height: 20px;
    background: var(--nv-accent);
    border-radius: 2px;
    flex-shrink: 0;
}

.nv-section-link {
    font-family: var(--nv-font-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--nv-accent);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.15s;
    white-space: nowrap;
}

.nv-section-link:hover {
    opacity: 1;
}

/* Article grid — 3-column */
.nv-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.nv-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

/* Card image container (div wrapper) */
.nv-card-img {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: var(--nv-surface-2);
    width: 100%;
    flex-shrink: 0;
}

.nv-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Image placeholders */
.nv-img-placeholder {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.nv-img-1 {
    background: linear-gradient(135deg, #0a0e1f 0%, #0e1a35 40%, #162645 70%, #0d1525 100%);
}

.nv-img-1::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 30% 40%, rgba(74, 158, 223, 0.25) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(100, 149, 237, 0.12) 0%, transparent 40%);
}

.nv-img-2 {
    background: linear-gradient(160deg, #080C18 0%, #0f1e36 50%, #152a4a 100%);
}

.nv-img-2::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 50% 30%, rgba(200, 216, 240, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(74, 158, 223, 0.15) 0%, transparent 40%);
}

.nv-img-3 {
    background: linear-gradient(120deg, #060a15 0%, #0c1830 60%, #111e3a 100%);
}

.nv-img-3::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 60% 40%, rgba(138, 155, 191, 0.2) 0%, transparent 45%),
        radial-gradient(circle at 20% 70%, rgba(74, 158, 223, 0.1) 0%, transparent 40%);
}

.nv-img-label {
    position: absolute;
    bottom: 12px;
    left: 12px;
    z-index: 2;
    font-family: var(--nv-font-mono);
    font-size: 10px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(200, 216, 240, 0.5);
    background: rgba(8, 12, 24, 0.6);
    padding: 3px 7px;
    border-radius: 2px;
}

/* Chip / tag */
.nv-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--nv-font-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--nv-accent);
    background: var(--nv-accent-dim);
    border: 1px solid var(--nv-border-accent);
    border-radius: 3px;
    padding: 3px 9px;
    line-height: 1;
    margin-bottom: 12px;
}

.nv-chip-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--nv-accent);
    flex-shrink: 0;
}

/* Card title */
.nv-card-title {
    font-family: var(--nv-font-head), var(--nv-font-heading), sans-serif;
    font-size: 17px;
    font-weight: 600;
    color: var(--nv-highlight);
    line-height: 1.35;
    margin-bottom: 10px;
}

.nv-card-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.15s;
}

.nv-card-title a:hover {
    color: var(--nv-accent);
    opacity: 1;
}

/* Read more link */
.nv-read-more {
    font-family: var(--nv-font-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.06em;
    color: var(--nv-accent);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    opacity: 0.85;
    transition: opacity 0.15s, gap 0.15s;
    white-space: nowrap;
}

.nv-read-more:hover {
    opacity: 1;
    gap: 8px;
}

/* Category Rubric Bar */
.nv-rubric-bar {
    background: var(--nv-surface);
    border: 1px solid var(--nv-border);
    border-radius: var(--nv-radius);
    padding: 28px 32px;
    margin-bottom: 60px;
}

.nv-rubric-title {
    font-family: var(--nv-font-mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--nv-text-secondary);
    margin-bottom: 18px;
}

.nv-rubric-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 10px;
}

.nv-rubric-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 16px 12px;
    background: var(--nv-bg);
    border: 1px solid var(--nv-border);
    border-radius: var(--nv-radius);
    text-decoration: none;
    transition: border-color 0.15s, background 0.15s;
    cursor: pointer;
}

.nv-rubric-item:hover {
    border-color: var(--nv-border-accent);
    background: var(--nv-accent-glow);
    opacity: 1;
}

.nv-rubric-icon {
    font-size: 22px;
    line-height: 1;
}

.nv-rubric-label {
    font-family: var(--nv-font-mono);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--nv-text-secondary);
    text-align: center;
    line-height: 1.3;
}

.nv-rubric-count {
    font-family: var(--nv-font-mono);
    font-size: 10px;
    color: var(--nv-accent);
    opacity: 0.7;
}

/* Light mode star dimming */
[data-theme="light"] .nv-stars { opacity: 0.15; }

/* ── Responsive additions for new grid classes ── */
@media (max-width: 900px) {
    .nv-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    .nv-rubric-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 640px) {
    .nv-grid-3,
    .nv-grid-2 {
        grid-template-columns: 1fr;
    }
    .nv-rubric-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .nv-hero {
        padding: 52px 0 48px;
    }
    .nv-hero-stats {
        flex-wrap: wrap;
        gap: 20px;
    }
    .nv-stat-sep {
        display: none;
    }
    .nv-rubric-bar {
        padding: 20px 16px;
    }
}

/* ============================================================
   PRINT
   ============================================================ */

@media print {
    .nv-header,
    .nv-footer,
    .nv-sidebar,
    .nv-theme-toggle,
    .nv-related {
        display: none !important;
    }
    body {
        background: #fff;
        color: #000;
    }
}