/* === IA Al Día — Blog Design === */
:root {
    --bg: #0a0a0f;
    --bg2: #111118;
    --bg3: #1a1a2e;
    --text: #e2e8f0;
    --text2: #94a3b8;
    --text3: #64748b;
    --accent: #3b82f6;
    --accent2: #2563eb;
    --accent-glow: rgba(59, 130, 246, .15);
    --border: #1e293b;
    --border2: #334155;
    --radius: 12px;
    --radius-sm: 8px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: #60a5fa; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

/* === HEADER === */
.header {
    border-bottom: 1px solid var(--border);
    background: var(--bg2);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.logo { font-size: 1.25rem; font-weight: 700; color: var(--text); }
.logo span { color: var(--accent); }
.logo:hover { color: var(--text); }
.logo small {
    font-size: .7rem;
    font-weight: 400;
    color: var(--text3);
    display: block;
}
.nav { display: flex; align-items: center; gap: 1.5rem; }
.nav a { color: var(--text2); font-size: .9rem; font-weight: 500; }
.nav a:hover { color: var(--text); }

/* === HERO === */
.hero {
    padding: 3rem 0 2rem;
    text-align: center;
}
.hero h1 { font-size: 2.5rem; font-weight: 800; background: linear-gradient(135deg, #60a5fa, #a78bfa); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { color: var(--text2); margin-top: .5rem; font-size: 1.05rem; }

/* === SEARCH === */
.search-box {
    max-width: 480px;
    margin: 1.5rem auto 0;
    position: relative;
}
.search-box input {
    width: 100%;
    padding: .75rem 1rem .75rem 2.8rem;
    background: var(--bg3);
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    color: var(--text);
    font-size: .95rem;
    outline: none;
    transition: border .2s, box-shadow .2s;
}
.search-box input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.search-box .icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text3);
}

/* === LAYOUT === */
.layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2.5rem;
    padding-top: 1rem;
}

/* === POSTS LIST === */
.posts-list { display: flex; flex-direction: column; gap: 1.25rem; }
.post-card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: border .2s, transform .15s;
}
.post-card:hover { border-color: var(--border2); transform: translateY(-1px); }
.post-card .meta {
    display: flex;
    align-items: center;
    gap: .75rem;
    margin-bottom: .5rem;
    font-size: .82rem;
    color: var(--text3);
}
.post-card .meta .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--text3); }
.post-card .meta .tag {
    display: inline-block;
    padding: .1rem .6rem;
    background: var(--accent-glow);
    color: var(--accent);
    border-radius: 999px;
    font-size: .75rem;
    font-weight: 500;
}
.post-card h2 { font-size: 1.2rem; font-weight: 600; margin-bottom: .5rem; }
.post-card h2 a { color: var(--text); }
.post-card h2 a:hover { color: var(--accent); }
.post-card .excerpt {
    color: var(--text2);
    font-size: .92rem;
    line-height: 1.6;
}
.post-card .read-more {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    margin-top: .75rem;
    font-size: .88rem;
    font-weight: 500;
    color: var(--accent);
}

/* === PAGINATION === */
.pagination {
    display: flex;
    justify-content: center;
    gap: .5rem;
    margin-top: 2rem;
}
.pagination a, .pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 .75rem;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: .9rem;
    color: var(--text2);
    transition: all .2s;
}
.pagination a:hover { background: var(--bg3); border-color: var(--accent); color: var(--accent); }
.pagination .active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* === SIDEBAR === */
.sidebar {
    position: sticky;
    top: 88px;
    align-self: start;
}
.sidebar-section {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}
.sidebar-section h3 {
    font-size: .85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--text3);
    margin-bottom: 1rem;
}
.sidebar-section p { color: var(--text2); font-size: .9rem; line-height: 1.6; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: .5rem; }
.tag-cloud a {
    display: inline-block;
    padding: .25rem .75rem;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: .8rem;
    color: var(--text2);
    transition: all .2s;
}
.tag-cloud a:hover { background: var(--accent-glow); border-color: var(--accent); color: var(--accent); }
.tag-cloud .count { color: var(--text3); font-size: .75rem; }

/* === POST PAGE === */
.post-page { max-width: 800px; }
.post-header { margin-bottom: 2rem; }
.post-header .back {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    color: var(--text3);
    font-size: .88rem;
    margin-bottom: 1rem;
}
.post-header .back:hover { color: var(--accent); }
.post-header h1 { font-size: 2rem; font-weight: 700; line-height: 1.3; margin-bottom: .75rem; }
.post-header .meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .75rem;
    color: var(--text3);
    font-size: .88rem;
}
.post-header .tags { display: flex; flex-wrap: wrap; gap: .5rem; }
.post-header .tags a {
    padding: .15rem .6rem;
    background: var(--accent-glow);
    color: var(--accent);
    border-radius: 999px;
    font-size: .78rem;
    font-weight: 500;
}
.post-content {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text2);
}
.post-content p { margin-bottom: 1.25rem; }
.post-content a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.post-content a:hover { color: #60a5fa; }
.post-content strong { color: var(--text); font-weight: 600; }
.post-content blockquote {
    border-left: 3px solid var(--accent);
    padding: .75rem 0 .75rem 1.25rem;
    margin: 1.5rem 0;
    background: var(--bg3);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text2);
    font-style: italic;
}
.post-content ul, .post-content ol { margin: 1rem 0; padding-left: 1.5rem; }
.post-content li { margin-bottom: .5rem; }
.post-content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2rem 0;
}
.post-content code {
    background: var(--bg3);
    padding: .15rem .4rem;
    border-radius: 4px;
    font-family: var(--mono);
    font-size: .9em;
}
.post-content pre {
    background: #0d0d1a;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    overflow-x: auto;
    margin: 1.5rem 0;
}
.post-content pre code {
    background: none;
    padding: 0;
    font-size: .9rem;
    line-height: 1.6;
}
.post-footer {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}
.post-footer .source {
    color: var(--text3);
    font-size: .85rem;
}
.post-footer .source a { color: var(--accent); }

/* === EMPTY STATE === */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text3);
}
.empty-state .icon { font-size: 3rem; margin-bottom: 1rem; }
.empty-state h2 { color: var(--text2); font-weight: 600; margin-bottom: .5rem; }

/* === FOOTER === */
.footer {
    margin-top: 4rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text3);
    font-size: .85rem;
}

/* === RESPONSIVE === */
@media (max-width: 900px) {
    .layout { grid-template-columns: 1fr; }
    .sidebar { position: static; }
    .hero h1 { font-size: 1.8rem; }
    .post-header h1 { font-size: 1.5rem; }
}
@media (max-width: 600px) {
    .header-inner { height: 56px; }
    .logo { font-size: 1.1rem; }
    .nav { gap: 1rem; }
    .post-card { padding: 1.25rem; }
}