/* ── Shared blog styles ─────────────────────────────────────────────────────
   Design tokens match main site exactly.
   Nav + Footer use Tailwind (tailwind.css loaded alongside).
   This file handles blog-specific layout, cards, hero, prose.
   ───────────────────────────────────────────────────────────────────────── */

/* ── Mobile nav — pure CSS control (no Tailwind breakpoint dependency) ───── */

#mobile-nav {
    display: none;
    flex-direction: column;
    background: #0a0a0a;
    border-top: 1px solid rgba(255,255,255,0.05);
    padding: 16px 24px 20px;
    gap: 4px;
}
#mobile-nav.is-open { display: flex; }

@media (min-width: 768px) {
    #mobile-nav    { display: none !important; }
    .nav-toggle    { display: none !important; }
}

:root {
    --color-bg-primary:    #0a0a0a;
    --color-bg-secondary:  #141414;
    --color-bg-card:       #111111;
    --color-text-primary:  #f0f7f3;
    --color-text-secondary:#b0c4b8;
    --color-text-tertiary: #6e9e82;
    --color-accent:        #52C37E;
    --color-accent2:       #2ABFAA;
    --color-accent-hover:  #45B870;
    --color-border:        rgba(255,255,255,0.06);
    --color-border-card:   rgba(255,255,255,0.07);
    --color-border-accent: rgba(82,195,126,0.25);
    --color-danger:        #ff6b6b;
    --font-primary:  'DM Sans', sans-serif;
    --font-display:  'Syne', sans-serif;
    --font-mono:     'IBM Plex Mono', monospace;
    --nav-h: 70px;
}

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

body {
    font-family: var(--font-primary);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    margin: 0;
    -webkit-font-smoothing: antialiased;
    line-height: 1.6;
}

/* ── Hero ────────────────────────────────────────────────────────────────── */

.blog-hero {
    position: relative;
    border-bottom: 1px solid var(--color-border);
    padding-top: var(--nav-h); /* offset for fixed nav — no arbitrary Tailwind needed */
}

.blog-hero-content {
    padding: 64px 24px 72px;
    max-width: 1280px;
    margin: 0 auto;
    position: relative;
    z-index: 10;
}

.blog-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px;
    border-radius: 9999px;
    border: 1px solid rgba(82,195,126,0.3);
    background: rgba(82,195,126,0.05);
    color: var(--color-accent);
    font-family: var(--font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 24px;
}

.blog-hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 6vw, 4rem);
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin: 0 0 20px;
}

.blog-hero-sub {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 520px;
    line-height: 1.65;
    margin: 0;
}

@media (max-width: 640px) {
    .blog-hero-content { padding: 48px 20px 56px; }
    .blog-hero-title   { font-size: 2rem; }
}

.blog-hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% 0%, rgba(82,195,126,0.07) 0%, transparent 70%),
        radial-gradient(ellipse 40% 40% at 80% 60%, rgba(42,191,170,0.04) 0%, transparent 60%);
    pointer-events: none;
}

/* ── Blog grid ───────────────────────────────────────────────────────────── */

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
    padding-top: 20px;
}

@media (max-width: 640px) {
    .blog-grid { grid-template-columns: 1fr; gap: 16px; }
}

/* ── Blog card ───────────────────────────────────────────────────────────── */

.blog-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-card);
    border-radius: 14px;
    padding: 28px 30px 24px;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
    overflow: hidden;
    transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.blog-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(82,195,126,0.04) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.blog-card:hover {
    border-color: var(--color-border-accent);
    transform: translateY(-3px);
    box-shadow: 0 0 0 1px rgba(82,195,126,0.08), 0 20px 48px rgba(0,0,0,0.36);
}

.blog-card:hover::before { opacity: 1; }

/* Top accent line on hover */
.blog-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent2));
    opacity: 0;
    transition: opacity 0.2s;
}
.blog-card:hover::after { opacity: 1; }

/* ── Card internals ── */

.blog-card-top {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}

.blog-category {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    background: rgba(82,195,126,0.08);
    border: 1px solid rgba(82,195,126,0.18);
    border-radius: 4px;
    padding: 2px 8px;
}

.blog-date {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
}

.blog-card-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text-primary);
    margin: 0 0 10px;
    letter-spacing: -0.01em;
}

.blog-card-excerpt {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.65;
    margin: 0;
    flex: 1;
}

.blog-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.read-more {
    font-size: 0.825rem;
    font-weight: 600;
    color: var(--color-accent);
    display: flex;
    align-items: center;
    gap: 5px;
    transition: gap 0.15s;
}
.blog-card:hover .read-more { gap: 8px; }

.blog-read-time {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-text-tertiary);
}

/* ── Skeleton loader ─────────────────────────────────────────────────────── */

.skeleton {
    background: linear-gradient(90deg,
        #1a1a1a 25%,
        #222 50%,
        #1a1a1a 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    display: block;
}
@keyframes shimmer {
    0%   { background-position:  200% 0; }
    100% { background-position: -200% 0; }
}
.skeleton-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-card);
    border-radius: 14px;
    padding: 28px 30px 24px;
}

/* ── State messages ──────────────────────────────────────────────────────── */

.empty-state,
.error-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
    color: var(--color-text-secondary);
}
.empty-state strong {
    display: block;
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--color-text-primary);
    margin-bottom: 8px;
}
.error-state strong {
    display: block;
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--color-danger);
    margin-bottom: 8px;
}

/* ── Post page ───────────────────────────────────────────────────────────── */

.post-loading {
    min-height: 100vh;
}
.post-loading-inner {
    max-width: 740px;
    margin: 0 auto;
    padding: 64px 24px;
    display: grid;
    gap: 0;
}

.post-wrapper {
    max-width: 740px;
    margin: 0 auto;
    padding: 40px 24px 96px;
}

/* Breadcrumb */
.post-breadcrumb {
    margin-bottom: 32px;
}
.post-breadcrumb a {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: color 0.15s;
}
.post-breadcrumb a:hover { color: var(--color-accent); }

/* Category badge on post */
.post-category-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    background: rgba(82,195,126,0.08);
    border: 1px solid rgba(82,195,126,0.18);
    border-radius: 4px;
    padding: 3px 10px;
    margin-bottom: 18px;
}

.post-header {
    margin-bottom: 40px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--color-border);
}

.post-title {
    font-family: var(--font-display);
    font-size: clamp(1.9rem, 4.5vw, 2.75rem);
    font-weight: 700;
    line-height: 1.12;
    letter-spacing: -0.02em;
    margin: 0 0 20px;
    color: var(--color-text-primary);
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
}
.post-meta .dot { color: rgba(255,255,255,0.15); }
.post-meta .author { color: var(--color-text-primary); font-weight: 500; }
.post-meta .date { font-family: var(--font-mono); font-size: 0.8rem; color: var(--color-text-tertiary); }
.post-meta .read-time { font-family: var(--font-mono); font-size: 0.8rem; color: var(--color-text-tertiary); }
.post-meta .category {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--color-accent);
    background: rgba(82,195,126,0.08);
    border: 1px solid rgba(82,195,126,0.15);
    border-radius: 3px;
    padding: 1px 6px;
}

/* Post footer nav */
.post-footer-nav {
    margin-top: 56px;
    padding-top: 28px;
    border-top: 1px solid var(--color-border);
}
.post-back-link {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--color-text-tertiary);
    text-decoration: none;
    transition: color 0.15s;
}
.post-back-link:hover { color: var(--color-accent); }

/* ── Post error ──────────────────────────────────────────────────────────── */

.post-error {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.post-error-inner {
    text-align: center;
    padding: 40px 24px;
    max-width: 420px;
}
.post-error-icon {
    font-family: var(--font-mono);
    font-size: 3rem;
    font-weight: 700;
    color: rgba(255,255,255,0.06);
    margin-bottom: 16px;
    line-height: 1;
}
.post-error-inner strong {
    display: block;
    font-family: var(--font-display);
    font-size: 1.4rem;
    color: var(--color-text-primary);
    margin-bottom: 10px;
}
.post-error-inner p {
    color: var(--color-text-secondary);
    margin-bottom: 28px;
    font-size: 0.95rem;
}
.post-error-link {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--color-accent);
    text-decoration: none;
    border: 1px solid rgba(82,195,126,0.25);
    border-radius: 6px;
    padding: 8px 18px;
    transition: background 0.15s, border-color 0.15s;
}
.post-error-link:hover {
    background: rgba(82,195,126,0.08);
    border-color: rgba(82,195,126,0.4);
}

/* ── Prose ───────────────────────────────────────────────────────────────── */

.prose {
    color: var(--color-text-secondary);
    line-height: 1.8;
    font-size: 1.05rem;
}
.prose h1,
.prose h2,
.prose h3,
.prose h4 {
    font-family: var(--font-display);
    color: var(--color-text-primary);
    line-height: 1.2;
    letter-spacing: -0.01em;
    margin: 2.2em 0 0.7em;
}
.prose h1 { font-size: 1.9rem; margin-top: 0; }
.prose h2 {
    font-size: 1.4rem;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--color-border);
}
.prose h3 { font-size: 1.15rem; }
.prose h4 { font-size: 1rem; color: var(--color-text-secondary); font-weight: 600; }

.prose p { margin: 0 0 1.4em; }

.prose a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: rgba(82,195,126,0.4);
    transition: color 0.15s, text-decoration-color 0.15s;
}
.prose a:hover {
    color: var(--color-accent-hover);
    text-decoration-color: var(--color-accent);
}

.prose strong { color: var(--color-text-primary); font-weight: 600; }
.prose em { font-style: italic; color: var(--color-text-primary); }

.prose code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: rgba(82,195,126,0.07);
    color: var(--color-accent);
    padding: 2px 7px;
    border-radius: 4px;
    border: 1px solid rgba(82,195,126,0.14);
}

.prose pre {
    background: #0e0e0e;
    border: 1px solid rgba(255,255,255,0.07);
    border-radius: 10px;
    padding: 22px 26px;
    overflow-x: auto;
    margin: 1.75em 0;
    position: relative;
}
.prose pre::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent2));
    border-radius: 10px 10px 0 0;
    opacity: 0.5;
}
.prose pre code {
    background: transparent;
    border: none;
    padding: 0;
    font-size: 0.88em;
    color: #c9d1c8;
    border-radius: 0;
}

.prose ul,
.prose ol {
    padding-left: 1.6em;
    margin: 0 0 1.4em;
}
.prose li { margin-bottom: 0.5em; }
.prose li::marker { color: var(--color-accent); }

.prose blockquote {
    border-left: 3px solid var(--color-accent);
    margin: 1.75em 0;
    padding: 10px 0 10px 22px;
    color: var(--color-text-tertiary);
    font-style: italic;
    background: rgba(82,195,126,0.03);
    border-radius: 0 6px 6px 0;
}
.prose blockquote p { margin: 0; }

.prose hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 2.5em 0;
}

.prose img {
    max-width: 100%;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    display: block;
    margin: 1.5em auto;
}

.prose figure { margin: 2em 0; }
.prose figcaption {
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    margin-top: 10px;
    font-family: var(--font-mono);
}

.prose table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.75em 0;
    font-size: 0.93em;
}
.prose th,
.prose td {
    padding: 10px 16px;
    border: 1px solid rgba(255,255,255,0.07);
    text-align: left;
}
.prose th {
    background: #141414;
    color: var(--color-text-primary);
    font-weight: 600;
    font-family: var(--font-mono);
    font-size: 0.8em;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.prose td { color: var(--color-text-secondary); }
.prose tr:nth-child(even) td { background: rgba(255,255,255,0.015); }

/* ── Responsive ──────────────────────────────────────────────────────────── */

@media (max-width: 768px) {
    .post-wrapper { padding: 32px 20px 72px; }
    .post-title { font-size: 1.75rem; }
    .prose { font-size: 1rem; }
    .prose pre { padding: 16px 18px; }
}