/* ============================================================
   TEMA DARK ULTRA MODERNO — CodeSnippets()
   Paleta escura, glassmorphism, neon accents, tipografia limpa
   ============================================================ */

/* ── Variáveis ── */
:root {
    --du-bg: #0a0a0f;
    --du-bg-secondary: #0f0f1a;
    --du-bg-tertiary: #161622;
    --du-bg-card: rgba(22, 22, 34, 0.8);
    --du-bg-glass: rgba(22, 22, 34, 0.6);
    --du-bg-navbar: rgba(10, 10, 15, 0.85);
    --du-cyan: #00d4ff;
    --du-cyan-dim: rgba(0, 212, 255, 0.15);
    --du-purple: #a855f7;
    --du-purple-dim: rgba(168, 85, 247, 0.15);
    --du-emerald: #34d399;
    --du-emerald-dim: rgba(52, 211, 153, 0.15);
    --du-amber: #fbbf24;
    --du-amber-dim: rgba(251, 191, 36, 0.15);
    --du-rose: #f43f5e;
    --du-text: #e2e8f0;
    --du-text-secondary: #94a3b8;
    --du-text-muted: #64748b;
    --du-border: rgba(148, 163, 184, 0.1);
    --du-border-hover: rgba(0, 212, 255, 0.3);
    --du-gradient-1: linear-gradient(135deg, var(--du-cyan), var(--du-purple));
    --du-gradient-2: linear-gradient(135deg, var(--du-emerald), var(--du-cyan));
    --du-gradient-3: linear-gradient(135deg, var(--du-amber), var(--du-rose));
    --du-shadow-glow: 0 0 20px rgba(0, 212, 255, 0.15);
    --du-shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
    --du-code-bg: #0d1117;
    --du-radius: 12px;
    --du-radius-sm: 8px;
}

/* ── Body ── */
body {
    background-color: var(--du-bg);
    background-image:
        radial-gradient(ellipse at 15% 25%, rgba(0, 212, 255, 0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 85% 75%, rgba(168, 85, 247, 0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(52, 211, 153, 0.015) 0%, transparent 70%);
    color: var(--du-text);
    font-family: 'Inter', sans-serif;
    line-height: 1.7;
}

/* ── Headings ── */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--du-text);
}

h1 {
    font-size: 2.5rem;
    background: var(--du-gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-info {
    color: var(--du-cyan) !important;
}

/* ── Navbar ── */
.navbar {
    background: var(--du-bg-navbar) !important;
    backdrop-filter: blur(20px) saturate(1.8);
    -webkit-backdrop-filter: blur(20px) saturate(1.8);
    border-bottom: 1px solid var(--du-border);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.3);
    padding: 0.6rem 1rem;
}

.navbar-brand {
    font-family: 'Fira Code', monospace;
    font-weight: 700;
    font-size: 1.35rem;
    background: var(--du-gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-brand span {
    -webkit-text-fill-color: initial;
    color: var(--du-purple);
}

.navbar-nav .nav-link {
    color: var(--du-text-secondary) !important;
    margin: 0 0.15rem;
    padding: 0.5rem 0.875rem;
    border-radius: var(--du-radius-sm);
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.25s ease;
    position: relative;
}

.navbar-nav .nav-link:hover {
    color: var(--du-text) !important;
    background-color: var(--du-bg-glass);
}

.navbar-nav .nav-link.active {
    color: var(--du-cyan) !important;
    background-color: var(--du-cyan-dim);
}

.navbar-nav .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50%;
    height: 2px;
    background: var(--du-gradient-1);
    border-radius: 2px;
}

.navbar-toggler {
    border-color: var(--du-border);
    color: var(--du-text);
}

.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='%2394a3b8' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ── Search Bar ── */
.search-bar {
    position: relative;
}

.search-bar input {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--du-border);
    color: var(--du-text);
    padding-right: 2.5rem;
    border-radius: var(--du-radius-sm);
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.search-bar input:focus {
    background-color: rgba(0, 212, 255, 0.05);
    border-color: var(--du-cyan);
    box-shadow: 0 0 0 3px var(--du-cyan-dim);
    color: var(--du-text);
}

.search-bar input::placeholder {
    color: var(--du-text-muted) !important;
    opacity: 1 !important;
}

.search-bar button {
    position: absolute;
    right: 8px;
    top: 6px;
    background: none;
    border: none;
    color: var(--du-text-muted);
    cursor: pointer;
    transition: color 0.2s;
}

.search-bar button:hover {
    color: var(--du-cyan);
}

/* ── Article Cards ── */
.article-card {
    background: var(--du-bg-card);
    border: 1px solid var(--du-border);
    border-radius: var(--du-radius);
    overflow: hidden;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--du-shadow-card);
    backdrop-filter: blur(4px);
}

.article-card:hover {
    transform: translateY(-6px) scale(1.01);
    border-color: var(--du-border-hover);
    box-shadow: var(--du-shadow-card), var(--du-shadow-glow);
}

.article-card .card-header {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(168, 85, 247, 0.05));
    border-bottom: 1px solid var(--du-border);
    color: var(--du-cyan);
    font-family: 'Fira Code', monospace;
    padding: 0.75rem 1rem;
}

.article-card .card-header a {
    color: var(--du-text-secondary);
    transition: color 0.2s;
}

.article-card .card-header a:hover {
    color: var(--du-cyan);
}

.article-card .card-body {
    padding: 1.25rem;
}

.article-card .card-title {
    color: var(--du-text);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.article-card .card-title a {
    color: var(--du-text) !important;
    transition: color 0.2s;
}

.article-card .card-title a:hover {
    color: var(--du-cyan) !important;
}

.article-card .card-text {
    color: var(--du-text-secondary);
    margin-bottom: 1rem;
}

.article-card .card-footer {
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid var(--du-border);
    color: var(--du-text-muted);
    font-size: 0.85rem;
    padding: 0.75rem 1rem;
}

/* ── Tags ── */
.article-tag {
    display: inline-block;
    background: rgba(0, 212, 255, 0.08);
    color: var(--du-cyan);
    padding: 0.2rem 0.55rem;
    border-radius: 6px;
    font-size: 0.78rem;
    margin-right: 0.4rem;
    margin-bottom: 0.4rem;
    font-family: 'Fira Code', monospace;
    border: 1px solid rgba(0, 212, 255, 0.15);
    transition: all 0.2s;
}

.article-tag:hover {
    background: var(--du-cyan-dim);
    border-color: rgba(0, 212, 255, 0.3);
}

.article-tag.react {
    background: rgba(0, 212, 255, 0.1);
    color: var(--du-cyan);
    border-color: rgba(0, 212, 255, 0.2);
}

.article-tag.node {
    background: var(--du-emerald-dim);
    color: var(--du-emerald);
    border-color: rgba(52, 211, 153, 0.2);
}

.article-tag.javascript {
    background: var(--du-amber-dim);
    color: var(--du-amber);
    border-color: rgba(251, 191, 36, 0.2);
}

.article-tag.python {
    background: rgba(0, 212, 255, 0.1);
    color: var(--du-cyan);
    border-color: rgba(0, 212, 255, 0.2);
}

/* ── Buttons ── */
.btn {
    font-weight: 600;
    letter-spacing: 0.3px;
    border-radius: var(--du-radius-sm);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--du-gradient-1);
    border: none;
    color: #fff;
    box-shadow: 0 4px 14px rgba(0, 212, 255, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(0, 212, 255, 0.35);
    color: #fff;
}

.btn-outline-light {
    border-color: var(--du-border);
    color: var(--du-text-secondary);
}

.btn-outline-light:hover {
    border-color: var(--du-cyan);
    background: var(--du-cyan-dim);
    color: var(--du-cyan);
}

/* ─── Article Content (Post View) ─── */
.article-content {
    background: var(--du-bg-card);
    border: 1px solid var(--du-border);
    border-radius: var(--du-radius);
    padding: 2rem;
    backdrop-filter: blur(4px);
}

.article-title {
    color: var(--du-text);
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 0.75rem;
    background: none;
    -webkit-text-fill-color: initial;
    -webkit-background-clip: initial;
    background-clip: initial;
}

.article-meta {
    color: var(--du-text-muted);
    font-size: 0.9rem;
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--du-border);
}

.article-body {
    color: var(--du-text);
    font-size: 1.05rem;
    line-height: 1.8;
}

.article-body p {
    margin-bottom: 1.25rem;
}

.article-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--du-radius-sm);
    border: 1px solid var(--du-border);
}

.article-body ul,
.article-body ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

.article-body li {
    margin-bottom: 0.5rem;
}

.article-share {
    border-top: 1px solid var(--du-border);
    padding-top: 1.5rem;
}

.article-share .social-icons a {
    border-color: var(--du-border);
    color: var(--du-text-muted);
}

.article-share .social-icons a:hover {
    border-color: var(--du-cyan);
    color: var(--du-cyan);
}

/* ─── Sidebar ─── */
.sidebar-section {
    background: var(--du-bg-card);
    border: 1px solid var(--du-border);
    border-radius: var(--du-radius);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
    backdrop-filter: blur(4px);
}

.sidebar-section h4,
.sidebar-section h5 {
    color: var(--du-cyan);
    font-size: 0.95rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--du-cyan-dim);
}

.sidebar-section p {
    color: var(--du-text-secondary);
    font-size: 0.9rem;
}

.related-articles h3 {
    font-family: 'Fira Code', monospace;
    color: var(--du-text-secondary);
    font-size: 1.25rem;
}

/* ── Footer ── */
footer {
    background: var(--du-bg-secondary);
    border-top: 1px solid var(--du-border);
    padding-top: 3rem;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--du-gradient-1);
    opacity: 0.3;
}

footer h5 {
    color: var(--du-cyan);
    font-weight: 700;
    margin-bottom: 1rem;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

footer a {
    color: var(--du-text-secondary);
    text-decoration: none;
    transition: color 0.2s;
    font-size: 0.9rem;
}

footer a:hover {
    color: var(--du-cyan);
    text-decoration: none;
}

footer p {
    color: var(--du-text-muted);
    font-size: 0.9rem;
}

.social-icons a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border: 1px solid var(--du-border);
    border-radius: 50%;
    color: var(--du-text-muted);
    margin-right: 0.5rem;
    transition: all 0.3s ease;
}

.social-icons a:hover {
    border-color: var(--du-cyan);
    background: var(--du-cyan-dim);
    color: var(--du-cyan);
    transform: translateY(-2px);
}

.footer-bottom {
    background: rgba(0, 0, 0, 0.2);
    padding: 1.2rem 0;
    margin-top: 2rem;
    border-top: 1px solid var(--du-border);
}

.footer-bottom p {
    color: var(--du-text-muted);
    font-size: 0.85rem;
}

/* ── Links gerais ── */
a {
    color: var(--du-cyan);
    transition: color 0.2s;
}

a:hover {
    color: var(--du-purple);
}

/* ── Border highlight ── */
.border-bottom {
    border-color: var(--du-border) !important;
}

/* ── "Você sabia?" box ── */
#voce-sabia {
    background: var(--du-bg-card) !important;
    backdrop-filter: blur(8px);
    border-left: 4px solid var(--du-cyan) !important;
    border-radius: var(--du-radius-sm) !important;
    color: var(--du-text) !important;
    box-shadow: var(--du-shadow-card);
}

#voce-sabia strong {
    background: var(--du-gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ── Cards de quiz ── */
.bg-white.rounded {
    background: var(--du-bg-card) !important;
    border: 1px solid var(--du-border);
    border-radius: var(--du-radius-sm) !important;
    backdrop-filter: blur(4px);
    transition: all 0.3s;
}

.bg-white.rounded:hover {
    border-color: var(--du-border-hover);
    box-shadow: var(--du-shadow-glow);
}

.bg-white.rounded a {
    color: var(--du-text-secondary) !important;
}

.bg-white.rounded a:hover {
    color: var(--du-cyan) !important;
}

/* ── Pagination ── */
.pagination {
    margin-top: 2rem;
}

.page-item:not(.active) .page-link {
    background: transparent;
    border-color: var(--du-border);
    color: var(--du-text-secondary);
    border-radius: var(--du-radius-sm);
    margin: 0 2px;
    transition: all 0.2s;
}

.page-item.active .page-link {
    background: var(--du-gradient-1);
    border: none;
    color: #fff;
    box-shadow: 0 4px 14px rgba(0, 212, 255, 0.3);
}

.page-item:not(.active) .page-link:hover {
    background: var(--du-cyan-dim);
    border-color: var(--du-cyan);
    color: var(--du-cyan);
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--du-bg); }
::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--du-cyan), var(--du-purple));
    border-radius: 4px;
    opacity: 0.5;
}
::-webkit-scrollbar-thumb:hover { opacity: 1; }

/* ── Text com gradiente ── */
.text-gradient {
    background: var(--du-gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ── Table ── */
.table {
    border: 1px solid var(--du-border);
    background: transparent;
    color: var(--du-text);
}

.table thead th {
    border-bottom: 2px solid var(--du-border);
    background: rgba(0, 212, 255, 0.05);
    color: var(--du-cyan);
    font-weight: 600;
}

/* ── Code blocks ── */
pre, code {
    font-family: 'Fira Code', monospace;
}

code {
    background: rgba(0, 212, 255, 0.08);
    color: var(--du-cyan);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.875em;
}

pre {
    background: var(--du-code-bg);
    border: 1px solid var(--du-border);
    border-radius: var(--du-radius-sm);
    padding: 1.25rem;
    overflow-x: auto;
}

pre code {
    border: none;
    padding: 0;
    background: transparent;
    color: var(--du-text);
}

/* ── Blockquote ── */
blockquote {
    border-left: 3px solid var(--du-cyan);
    padding-left: 1.25rem;
    margin: 1.5rem 0;
    color: var(--du-text-secondary);
    font-style: italic;
}

/* ── Badges ── */
.badge {
    font-weight: 500;
    letter-spacing: 0.5px;
    padding: 0.3rem 0.6rem;
}

.badge.bg-info {
    background: var(--du-cyan-dim) !important;
    color: var(--du-cyan) !important;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.badge.bg-success {
    background: var(--du-emerald-dim) !important;
    color: var(--du-emerald) !important;
    border: 1px solid rgba(52, 211, 153, 0.2);
}

.badge.bg-danger {
    background: rgba(244, 63, 94, 0.1) !important;
    color: var(--du-rose) !important;
    border: 1px solid rgba(244, 63, 94, 0.2);
}

.badge.bg-warning {
    background: var(--du-amber-dim) !important;
    color: var(--du-amber) !important;
    border: 1px solid rgba(251, 191, 36, 0.2);
}

/* ── Horizontal Rule ── */
hr {
    border-color: var(--du-border);
    opacity: 0.5;
}

/* ── Selection ── */
::selection {
    background: rgba(0, 212, 255, 0.3);
    color: #fff;
}

/* ── Glow Effects ── */
.glow-cyan {
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
}

.glow-purple {
    box-shadow: 0 0 20px rgba(168, 85, 247, 0.15);
}

/* ── Loading shimmer (para cards enquanto carregam) ── */
@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}