/* LUPO blog shared styles. Mirrors the design tokens used inline in
   index.html so the blog reads as part of the same premium dark surface,
   without duplicating the homepage's full inline CSS on every post. */

:root {
    --text-primary: #f5f5f7;
    --text-secondary: #a1a1a6;
    --text-tertiary: rgba(255, 255, 255, 0.5);
    --bg-primary: #000000;
    --bg-secondary: #161617;
    --accent: #2997ff;
    --accent-hover: #409cff;
    --purple: #a78bfa;
    --border: rgba(255, 255, 255, 0.08);
    --gradient-purple: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    font-weight: 400;
    letter-spacing: -0.011em;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

a { color: inherit; text-decoration: none; }

/* Subtle background wash, matches the homepage feel without being heavy */
.animated-bg {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: -1;
    opacity: 0.025;
    background:
        radial-gradient(circle at 20% 50%, var(--accent) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, #764ba2 0%, transparent 50%);
}

/* ── Nav (matches index.html) ─────────────────────────────────────── */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    background: rgba(0, 0, 0, 0.72);
    border-bottom: 1px solid var(--border);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 22px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 21px;
    font-weight: 600;
    letter-spacing: 0.2px;
    cursor: pointer;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
    font-weight: 500;
    letter-spacing: -0.022em; /* freeze nav width — matches every other page */
}

.nav-link:hover { color: var(--text-primary); }
.nav-link.is-active { color: var(--text-primary); }

.nav-login-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 18px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: -0.01em;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-login-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.nav-login-btn svg { width: 16px; height: 16px; opacity: 0.9; }

/* ── Generic helpers ──────────────────────────────────────────────── */
main {
    padding-top: 52px;
    position: relative;
    z-index: 1;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ── Blog index hero ──────────────────────────────────────────────── */
.blog-hero {
    padding: 80px 24px 60px;
    max-width: 1100px;
    margin: 0 auto;
    text-align: left;
}

.blog-hero-eyebrow {
    display: inline-block;
    padding: 7px 16px;
    border: 1px solid rgba(167, 139, 250, 0.28);
    border-radius: 999px;
    background: rgba(167, 139, 250, 0.08);
    font-size: 12px;
    font-weight: 600;
    color: var(--purple);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 28px;
}

.blog-hero-title {
    font-size: 64px;
    font-weight: 600;
    letter-spacing: -0.022em;
    line-height: 1.05;
    margin-bottom: 22px;
    background: linear-gradient(180deg, var(--text-primary) 0%, rgba(255, 255, 255, 0.72) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    max-width: 900px;
}

.blog-hero-subtitle {
    font-size: 20px;
    line-height: 1.5;
    color: var(--text-secondary);
    max-width: 760px;
}

/* ── Blog index grid ──────────────────────────────────────────────── */
.blog-grid {
    max-width: 1100px;
    margin: 0 auto 80px;
    padding: 0 24px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.blog-card {
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(255, 255, 255, 0.09);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.015) 100%),
        var(--bg-primary);
    border-radius: 18px;
    padding: 32px;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.04),
        0 1px 2px rgba(0, 0, 0, 0.4),
        0 8px 24px rgba(0, 0, 0, 0.18);
    transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
    color: inherit;
    text-decoration: none;
}

.blog-card:hover {
    border-color: rgba(167, 139, 250, 0.32);
    background:
        linear-gradient(180deg, rgba(167, 139, 250, 0.07) 0%, rgba(118, 75, 162, 0.025) 100%),
        var(--bg-primary);
    transform: translateY(-2px);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.06),
        0 4px 12px rgba(167, 139, 250, 0.08),
        0 12px 32px rgba(0, 0, 0, 0.28);
}

.blog-card-featured {
    grid-column: 1 / -1;
    padding: 48px;
    border-color: rgba(167, 139, 250, 0.18);
    background:
        radial-gradient(ellipse at top left, rgba(167, 139, 250, 0.08) 0%, transparent 60%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.045) 0%, rgba(255, 255, 255, 0.018) 100%),
        var(--bg-primary);
}

.blog-card-featured:hover {
    border-color: rgba(167, 139, 250, 0.4);
    background:
        radial-gradient(ellipse at top left, rgba(167, 139, 250, 0.12) 0%, transparent 60%),
        linear-gradient(180deg, rgba(167, 139, 250, 0.08) 0%, rgba(118, 75, 162, 0.03) 100%),
        var(--bg-primary);
}

.blog-card-eyebrow {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 11px;
    font-weight: 600;
    color: var(--purple);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.blog-card-eyebrow .dot {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.55;
}

.blog-card h2 {
    font-size: 26px;
    font-weight: 600;
    letter-spacing: -0.018em;
    line-height: 1.18;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.blog-card-featured h2 {
    font-size: 36px;
    line-height: 1.1;
}

.blog-card p {
    font-size: 15.5px;
    line-height: 1.55;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.blog-card-featured p {
    font-size: 17px;
    max-width: 720px;
}

.blog-card-arrow {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--accent);
    transition: gap 0.2s ease;
}

.blog-card:hover .blog-card-arrow { gap: 10px; }

/* Blog-index bottom CTA */
.blog-index-cta {
    max-width: 1100px;
    width: calc(100% - 48px);
    margin: 0 auto 120px;
    padding: 56px 32px;
    text-align: center;
    border: 1px solid rgba(167, 139, 250, 0.18);
    background: rgba(118, 75, 162, 0.05);
    border-radius: 18px;
}

.blog-index-cta-eyebrow {
    font-size: 11px;
    font-weight: 600;
    color: var(--purple);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 14px;
}

.blog-index-cta h2 {
    font-size: 32px;
    font-weight: 600;
    letter-spacing: -0.018em;
    line-height: 1.18;
    margin-bottom: 14px;
    background: linear-gradient(180deg, var(--text-primary) 0%, rgba(255, 255, 255, 0.72) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.blog-index-cta p {
    font-size: 17px;
    line-height: 1.5;
    color: var(--text-secondary);
    max-width: 580px;
    margin: 0 auto 26px;
}

/* ── Article page ─────────────────────────────────────────────────── */
.article {
    max-width: 760px;
    margin: 0 auto;
    padding: 60px 24px 80px;
}

.article-header {
    margin-bottom: 40px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 36px;
}

.article-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 11px;
    font-weight: 600;
    color: var(--purple);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 24px;
}

.article-eyebrow .dot {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.55;
}

.article-title {
    font-size: 44px;
    font-weight: 600;
    letter-spacing: -0.022em;
    line-height: 1.1;
    margin-bottom: 22px;
    background: linear-gradient(180deg, var(--text-primary) 0%, rgba(255, 255, 255, 0.72) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.article-summary {
    font-size: 19px;
    line-height: 1.5;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.article-meta {
    font-size: 13px;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: 0.005em;
}

.article-meta .dot {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.55;
}

/* Article body typography */
.article-body {
    color: var(--text-primary);
}

.article-body p,
.article-body ul,
.article-body ol {
    font-size: 17px;
    line-height: 1.62;
    color: rgba(255, 255, 255, 0.88);
    margin-bottom: 22px;
}

.article-body p strong {
    color: var(--text-primary);
    font-weight: 600;
}

.article-body h2 {
    font-size: 26px;
    font-weight: 600;
    letter-spacing: -0.015em;
    line-height: 1.2;
    margin: 48px 0 16px;
    color: var(--text-primary);
}

.article-body h3 {
    font-size: 19px;
    font-weight: 600;
    letter-spacing: -0.005em;
    line-height: 1.3;
    margin: 32px 0 12px;
    color: var(--text-primary);
}

.article-body ul,
.article-body ol {
    padding-left: 24px;
}

.article-body li { margin-bottom: 10px; }

.article-body blockquote {
    margin: 28px 0;
    padding: 18px 24px;
    border-left: 3px solid rgba(167, 139, 250, 0.55);
    background: rgba(255, 255, 255, 0.025);
    border-radius: 0 12px 12px 0;
    font-size: 17px;
    line-height: 1.55;
    color: var(--text-primary);
}

.article-body a {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-color: rgba(41, 151, 255, 0.4);
    text-underline-offset: 3px;
}

.article-body a:hover { text-decoration-color: var(--accent); }

.article-body code {
    background: rgba(255, 255, 255, 0.08);
    padding: 1px 6px;
    border-radius: 4px;
    font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, monospace;
    font-size: 0.92em;
}

/* Sources block */
.article-sources {
    margin-top: 56px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.article-sources h3 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 18px;
}

.article-sources ol {
    padding-left: 20px;
    margin: 0;
}

.article-sources li {
    font-size: 14px;
    line-height: 1.55;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.article-sources a {
    color: var(--text-primary);
    text-decoration: underline;
    text-decoration-color: rgba(255, 255, 255, 0.22);
    text-underline-offset: 2px;
}

.article-sources a:hover {
    color: var(--accent);
    text-decoration-color: var(--accent);
}

/* Article bottom CTA */
.article-cta {
    margin-top: 64px;
    padding: 36px;
    border: 1px solid rgba(167, 139, 250, 0.22);
    background: rgba(118, 75, 162, 0.06);
    border-radius: 18px;
    text-align: center;
}

.article-cta-eyebrow {
    font-size: 11px;
    font-weight: 600;
    color: var(--purple);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 14px;
}

.article-cta h2 {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -0.018em;
    line-height: 1.18;
    margin-bottom: 14px;
    color: var(--text-primary);
}

.article-cta p {
    font-size: 16.5px;
    line-height: 1.5;
    color: var(--text-secondary);
    max-width: 540px;
    margin: 0 auto 26px;
}

/* Primary button (matches homepage) */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 999px;
    font-size: 16px;
    font-weight: 500;
    letter-spacing: -0.011em;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 0 4px 20px rgba(41, 151, 255, 0.3);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(41, 151, 255, 0.4);
}

.btn-primary svg { width: 18px; height: 18px; }

/* Related articles */
.article-related {
    margin-top: 64px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.article-related h3 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 22px;
}

.article-related-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.article-related-item {
    display: block;
    padding: 22px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.02);
    color: inherit;
    text-decoration: none;
    transition: border-color 0.25s ease, background 0.25s ease;
}

.article-related-item:hover {
    border-color: rgba(167, 139, 250, 0.25);
    background: rgba(118, 75, 162, 0.05);
}

.article-related-item-eyebrow {
    font-size: 10px;
    font-weight: 600;
    color: var(--purple);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.article-related-item h4 {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.32;
    color: var(--text-primary);
    letter-spacing: -0.005em;
}

/* ── Footer (matches index.html) ──────────────────────────────────── */
footer {
    border-top: 1px solid var(--border);
    padding: 30px 40px;
    background: linear-gradient(to bottom, var(--bg-primary), var(--bg-secondary));
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-left-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.2px;
}

.footer-text {
    font-size: 13px;
    color: var(--text-secondary);
}

.footer-address {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.35);
    line-height: 1.55;
}

.footer-links-container {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 4px;
}

.footer-links-container a {
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
    white-space: nowrap;
}

.footer-links-container a:hover { color: var(--text-primary); }

.footer-right-section {
    display: flex;
    align-items: flex-end;
}

/* ── Mobile responsive ────────────────────────────────────────────── */
@media (max-width: 980px) {
    .blog-grid { grid-template-columns: 1fr; }
    .blog-card-featured { padding: 32px; }
    .blog-card-featured h2 { font-size: 30px; }
    .article-related-list { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-login-btn { padding: 7px 14px; font-size: 13px; }
    .nav-login-btn svg { width: 14px; height: 14px; }

    .blog-hero { padding: 56px 20px 40px; }
    .blog-hero-title { font-size: 38px; }
    .blog-hero-subtitle { font-size: 17px; }
    .blog-hero-eyebrow { font-size: 11px; padding: 6px 14px; margin-bottom: 22px; }

    .blog-grid { padding: 0 20px; gap: 16px; margin-bottom: 60px; }
    .blog-card { padding: 24px; }
    .blog-card-featured { padding: 28px; }
    .blog-card h2 { font-size: 22px; }
    .blog-card-featured h2 { font-size: 26px; }
    .blog-card p { font-size: 15px; }

    .blog-index-cta {
        padding: 36px 22px;
        margin-bottom: 80px;
    }
    .blog-index-cta h2 { font-size: 24px; }
    .blog-index-cta p { font-size: 15.5px; }

    .article { padding: 40px 20px 60px; }
    .article-title { font-size: 30px; }
    .article-summary { font-size: 17px; }
    .article-body p,
    .article-body ul,
    .article-body ol { font-size: 16px; }
    .article-body h2 { font-size: 22px; margin: 36px 0 12px; }
    .article-body h3 { font-size: 17px; }
    .article-body blockquote { font-size: 16px; padding: 14px 18px; }
    .article-cta { padding: 26px 22px; }
    .article-cta h2 { font-size: 22px; }
    .article-cta p { font-size: 15px; }

    footer { padding: 24px 20px; }
    .footer-content { flex-direction: column; }
    .footer-logo { font-size: 16px; }
}