/* ═══════════════════════════════════════════════════════════
   Blog Luxora Digital — Estilos Globales
   Design System heredado de luxoradigital.com
   ═══════════════════════════════════════════════════════════ */

/* ── Reset & Base ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    /* Colors */
    --bg-primary: #050d18;
    --bg-secondary: #0a1628;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-hover: rgba(255, 255, 255, 0.09);
    --text-primary: #fafafa;
    --text-secondary: rgba(250, 250, 250, 0.6);
    --text-tertiary: rgba(250, 250, 250, 0.4);
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);

    /* Brand */
    --magenta: #ff4a63;
    --cyan: #08bec9;
    --purple: #4d1082;
    --gold: #ba8d3c;

    /* Gradients */
    --gradient-brand: linear-gradient(135deg, #ff4a63, #4d1082, #08bec9);
    --gradient-magenta: linear-gradient(135deg, #ff4a63, #4d1082);
    --gradient-cyan: linear-gradient(135deg, #4d1082, #08bec9);

    /* Typography */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Karla', sans-serif;

    /* Spacing */
    --section-padding: clamp(60px, 8vw, 120px);
    --container-max: 1200px;
    --container-narrow: 800px;

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 999px;
}

html, body {
    overflow-x: hidden;
    max-width: 100vw;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 17px;
}

a { color: var(--cyan); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--magenta); }

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

.container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
.container--narrow { max-width: var(--container-narrow); }

/* ── Navigation ── */
.nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(5, 13, 24, 0.85);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: background 0.3s ease;
}

.nav__inner {
    max-width: var(--container-max);
    margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between;
    height: 72px;
}

.nav__logo { display: flex; align-items: center; gap: 10px; font-family: var(--font-heading); font-weight: 800; font-size: 1.4rem; color: var(--text-primary); }
.nav__logo span { background: var(--gradient-brand); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.nav__links { display: flex; align-items: center; gap: 32px; list-style: none; }
.nav__links a { color: var(--text-secondary); font-size: 0.9rem; font-weight: 500; transition: color 0.2s ease; }
.nav__links a:hover { color: var(--text-primary); }

.nav__cta {
    display: inline-flex; align-items: center; gap: 8px;
    background: var(--gradient-brand); color: #fff;
    padding: 10px 24px; border-radius: var(--radius-full);
    font-weight: 600; font-size: 0.9rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 20px rgba(255, 74, 99, 0.3);
}
.nav__cta:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(255, 74, 99, 0.4); color: #fff; }

.nav__hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.nav__hamburger span { width: 24px; height: 2px; background: var(--text-primary); transition: 0.3s ease; border-radius: 2px; }

/* ── Hero (Blog Home) ── */
.hero {
    padding: calc(72px + var(--section-padding)) 0 var(--section-padding);
    text-align: center;
    position: relative; overflow: hidden;
}

.hero::before {
    content: ''; position: absolute; inset: 0; z-index: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(255, 74, 99, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(8, 190, 201, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 0%, rgba(77, 16, 130, 0.12) 0%, transparent 60%);
}

.hero__tag {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(8, 190, 201, 0.08); border: 1px solid rgba(8, 190, 201, 0.2);
    border-radius: var(--radius-full); padding: 6px 16px;
    font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.15em;
    color: var(--cyan); margin-bottom: 24px; position: relative; z-index: 1;
}

.hero__title {
    font-family: var(--font-heading); font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 900; line-height: 1.15; letter-spacing: -0.03em;
    margin-bottom: 20px; position: relative; z-index: 1;
}

.hero__title span {
    background: var(--gradient-brand);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.hero__subtitle {
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    color: var(--text-secondary); max-width: 600px; margin: 0 auto 40px;
    position: relative; z-index: 1;
}

/* ── Category Filters ── */
.filters {
    display: flex; flex-wrap: wrap; justify-content: center; gap: 10px;
    margin-bottom: 48px;
}

.filter-btn {
    background: var(--bg-card); border: 1px solid var(--border);
    color: var(--text-secondary); padding: 8px 20px; border-radius: var(--radius-full);
    font-size: 0.85rem; font-weight: 500; cursor: pointer;
    transition: all 0.2s ease; font-family: var(--font-body);
}
.filter-btn:hover, .filter-btn.active {
    background: rgba(8, 190, 201, 0.1); border-color: rgba(8, 190, 201, 0.3);
    color: var(--cyan);
}

/* ── Blog Grid ── */
.blog-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 28px; margin-bottom: var(--section-padding);
}

/* ── Blog Card ── */
.blog-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg); overflow: hidden;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    display: flex; flex-direction: column;
}
.blog-card:hover {
    transform: translateY(-4px); border-color: var(--border-hover);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.blog-card__image {
    width: 100%; height: 200px; object-fit: cover;
    background: var(--bg-secondary);
}

.blog-card__image--placeholder {
    display: flex; align-items: center; justify-content: center;
    height: 200px; background: var(--bg-secondary);
    font-size: 3rem; opacity: 0.15;
}

.blog-card__body { padding: 24px; flex: 1; display: flex; flex-direction: column; }

.blog-card__meta {
    display: flex; align-items: center; gap: 12px;
    font-size: 0.78rem; color: var(--text-tertiary); margin-bottom: 12px;
}

.blog-card__category {
    background: rgba(255, 74, 99, 0.1); color: var(--magenta);
    padding: 3px 10px; border-radius: var(--radius-full);
    font-weight: 600; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em;
}

.blog-card__title {
    font-family: var(--font-heading); font-size: 1.15rem;
    font-weight: 700; line-height: 1.35; margin-bottom: 10px;
    color: var(--text-primary);
}
.blog-card__title a { color: inherit; }
.blog-card__title a:hover { color: var(--cyan); }

.blog-card__excerpt {
    color: var(--text-secondary); font-size: 0.92rem; line-height: 1.6;
    flex: 1; margin-bottom: 16px;
}

.blog-card__read {
    display: inline-flex; align-items: center; gap: 6px;
    color: var(--cyan); font-weight: 600; font-size: 0.88rem;
    transition: gap 0.2s ease;
}
.blog-card__read:hover { gap: 10px; color: var(--magenta); }

/* ── Article Page ── */
.article-header {
    padding: calc(72px + 60px) 0 40px;
    text-align: center; position: relative;
}
.article-header::before {
    content: ''; position: absolute; inset: 0; z-index: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(77, 16, 130, 0.15) 0%, transparent 60%);
}

.breadcrumb {
    display: flex; align-items: center; justify-content: center; gap: 8px;
    font-size: 0.82rem; color: var(--text-tertiary); margin-bottom: 20px;
    position: relative; z-index: 1;
}
.breadcrumb a { color: var(--text-tertiary); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb__sep { opacity: 0.4; }

.article-header__category {
    display: inline-block;
    background: rgba(255, 74, 99, 0.1); color: var(--magenta);
    padding: 4px 14px; border-radius: var(--radius-full);
    font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em;
    margin-bottom: 16px; position: relative; z-index: 1;
}

.article-header__title {
    font-family: var(--font-heading); font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800; line-height: 1.2; letter-spacing: -0.02em;
    max-width: 800px; margin: 0 auto 16px; position: relative; z-index: 1;
}

.article-header__meta {
    display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap;
    font-size: 0.85rem; color: var(--text-tertiary); position: relative; z-index: 1;
}

/* ── Article Layout ── */
.article-layout {
    display: grid; grid-template-columns: 1fr minmax(0, 240px);
    gap: 48px; max-width: var(--container-max); margin: 0 auto;
    padding: 40px 24px var(--section-padding);
    overflow: hidden;
}

/* ── Article Content ── */
.article-content {
    max-width: var(--container-narrow);
    font-size: 1.05rem; line-height: 1.8;
    overflow-wrap: break-word; word-wrap: break-word;
    min-width: 0;
}

.article-content h2 {
    font-family: var(--font-heading); font-size: 1.6rem;
    font-weight: 700; margin: 48px 0 16px; color: var(--text-primary);
    letter-spacing: -0.01em;
}

.article-content h3 {
    font-family: var(--font-heading); font-size: 1.25rem;
    font-weight: 600; margin: 32px 0 12px; color: var(--text-primary);
}

.article-content p { color: var(--text-secondary); margin-bottom: 20px; }

.article-content ul, .article-content ol {
    color: var(--text-secondary); margin-bottom: 20px; padding-left: 24px;
}
.article-content li { margin-bottom: 8px; }

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

.article-content blockquote {
    border-left: 3px solid var(--cyan); padding: 16px 24px;
    background: rgba(8, 190, 201, 0.05); border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin: 24px 0; font-style: italic; color: var(--text-secondary);
}

.article-content img {
    border-radius: var(--radius-md); margin: 24px 0;
    border: 1px solid var(--border);
}

.article-content a { color: var(--cyan); text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: var(--magenta); }

/* Highlight box */
.highlight-box {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 24px 28px; margin: 28px 0;
}
.highlight-box__title {
    font-family: var(--font-heading); font-weight: 700; font-size: 1rem;
    color: var(--cyan); margin-bottom: 8px;
}

/* Table */
.table-wrapper { overflow-x: auto; margin: 24px 0; -webkit-overflow-scrolling: touch; }
.article-content table {
    width: 100%; border-collapse: collapse; margin: 24px 0;
    font-size: 0.95rem;
}
.article-content th {
    background: rgba(8, 190, 201, 0.08); color: var(--text-primary);
    padding: 12px 16px; text-align: left; font-weight: 600;
    border-bottom: 1px solid var(--border);
}
.article-content td {
    padding: 12px 16px; border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}
.article-content tr:hover td { background: rgba(255, 255, 255, 0.02); }

/* ── Table of Contents (Sidebar) ── */
.toc {
    position: sticky; top: 96px;
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 24px;
}

.toc__title {
    font-family: var(--font-heading); font-size: 0.85rem;
    font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em;
    color: var(--text-tertiary); margin-bottom: 16px;
}

.toc__list { list-style: none; }
.toc__list li { margin-bottom: 8px; }
.toc__list a {
    color: var(--text-tertiary); font-size: 0.85rem;
    transition: color 0.2s ease; display: block;
    padding: 4px 0; border-left: 2px solid transparent; padding-left: 12px;
}
.toc__list a:hover, .toc__list a.active {
    color: var(--cyan); border-left-color: var(--cyan);
}

/* ── CTA Banner ── */
.cta-banner {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-xl); padding: 48px;
    text-align: center; margin: 60px 0;
    position: relative; overflow: hidden;
}
.cta-banner::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(ellipse at center, rgba(77, 16, 130, 0.15) 0%, transparent 70%);
}

.cta-banner__title {
    font-family: var(--font-heading); font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 800; margin-bottom: 12px; position: relative; z-index: 1;
}
.cta-banner__title span {
    background: var(--gradient-brand);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.cta-banner__text {
    color: var(--text-secondary); font-size: 1.05rem;
    max-width: 500px; margin: 0 auto 24px; position: relative; z-index: 1;
}

.cta-banner__btn {
    display: inline-flex; align-items: center; gap: 8px;
    background: var(--gradient-brand); color: #fff;
    padding: 14px 32px; border-radius: var(--radius-full);
    font-weight: 700; font-size: 1rem;
    box-shadow: 0 4px 20px rgba(255, 74, 99, 0.3);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    position: relative; z-index: 1;
}
.cta-banner__btn:hover {
    transform: translateY(-2px); box-shadow: 0 6px 25px rgba(255, 74, 99, 0.4); color: #fff;
}

/* ── Related Posts ── */
.related, .related-posts {
    padding: 60px 0; border-top: 1px solid var(--border);
}
.related__title, .related-posts__title {
    font-family: var(--font-heading); font-size: 1.6rem;
    font-weight: 700; text-align: center; margin-bottom: 36px;
}

.related__grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

/* ── FAQ Section ── */
.faq, .faq-section { margin: 48px 0; }
.faq__title, .faq-section h2 {
    font-family: var(--font-heading); font-size: 1.4rem;
    font-weight: 700; margin-bottom: 24px;
}

.faq__item {
    border: 1px solid var(--border); border-radius: var(--radius-md);
    margin-bottom: 12px; overflow: hidden;
}

.faq__item summary {
    padding: 16px 20px; cursor: pointer; font-weight: 600;
    color: var(--text-primary); list-style: none;
    display: flex; align-items: center; justify-content: space-between;
    transition: color 0.2s ease;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after { content: '+'; font-size: 1.3rem; color: var(--text-tertiary); transition: transform 0.2s ease; }
.faq__item[open] summary::after { content: '-'; color: var(--cyan); }
.faq__item[open] summary { color: var(--cyan); border-bottom: 1px solid var(--border); }

.faq__answer { padding: 16px 20px; color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }

/* ── Footer ── */
.footer {
    background: var(--bg-secondary); border-top: 1px solid var(--border);
    padding: 60px 0 32px;
}

.footer__grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr;
    gap: 48px; margin-bottom: 40px;
}

.footer__brand { font-family: var(--font-heading); font-weight: 800; font-size: 1.3rem; margin-bottom: 12px; }
.footer__brand span { background: var(--gradient-brand); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.footer__desc { color: var(--text-tertiary); font-size: 0.9rem; line-height: 1.6; }

.footer__heading {
    font-family: var(--font-heading); font-size: 0.8rem;
    font-weight: 700; text-transform: uppercase; letter-spacing: 0.12em;
    color: var(--text-tertiary); margin-bottom: 16px;
}

.footer__list { list-style: none; }
.footer__list li { margin-bottom: 10px; }
.footer__list a { color: var(--text-secondary); font-size: 0.9rem; }
.footer__list a:hover { color: var(--cyan); }

.footer__bottom {
    border-top: 1px solid var(--border); padding-top: 24px;
    display: flex; align-items: center; justify-content: space-between;
    font-size: 0.82rem; color: var(--text-tertiary);
}

/* ── Focus States (Accessibility) ── */
:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 3px;
    border-radius: 4px;
}
a:focus-visible { outline-offset: 2px; }
button:focus-visible { outline-offset: 2px; }
.nav__cta:focus-visible, .cta-banner__btn:focus-visible { outline-color: #fff; }
details summary:focus-visible { outline-offset: -2px; }

/* ── Scroll Animations ── */
[data-animate] { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
[data-animate].visible { opacity: 1; transform: translateY(0); }

/* ── Responsive ── */
@media (max-width: 1024px) {
    .article-layout { grid-template-columns: 1fr; overflow: hidden; }
    .article-content { max-width: 100%; }
    .toc { display: none; }
}

@media (min-width: 769px) {
    .nav__links { display: flex !important; }
    .nav__hamburger { display: none !important; }
}

@media (max-width: 768px) {
    .nav__links { display: none; }
    .nav__hamburger { display: flex; }
    .nav__links.open {
        display: flex; flex-direction: column;
        position: fixed; inset: 0; top: 72px;
        background: rgba(5, 13, 24, 0.97); backdrop-filter: blur(20px);
        padding: 40px 24px; gap: 24px; z-index: 99;
    }
    .nav__links.open a { font-size: 1.2rem; }

    .blog-grid { grid-template-columns: 1fr; }
    .related__grid { grid-template-columns: 1fr; }
    .footer__grid { grid-template-columns: 1fr; gap: 32px; }
    .footer__bottom { flex-direction: column; gap: 12px; text-align: center; }
    .cta-banner { padding: 32px 20px; }
    .article-content h2 { font-size: 1.35rem; }
    .article-content { font-size: 0.95rem; }
    .article-header__title { font-size: clamp(1.5rem, 6vw, 2rem); padding: 0 8px; }
    .breadcrumb { font-size: 0.72rem; flex-wrap: wrap; justify-content: center; }
    .article-header__meta { font-size: 0.8rem; }
    .highlight-box { padding: 18px 16px; }
    .faq__item summary { font-size: 0.9rem; padding: 14px 16px; }
    .faq__answer { padding: 14px 16px; font-size: 0.88rem; }
    .related-posts__title { font-size: 1.3rem; }
    .article-layout { padding: 24px 16px var(--section-padding); gap: 24px; }
}