/*
Theme Name: n8n Việt Nam
Theme URI: https://n8n.ac.vn/
Author: n8n.ac.vn
Author URI: https://n8n.ac.vn/
Description: Custom theme cho trang affiliate + education n8n automation. Clean, developer-friendly, mobile-first.
Version: 9.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 7.4
License: GPL v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: n8n-ac-vn
Tags: affiliate, blog, custom-menu, featured-images
*/

/* ===== CSS VARIABLES ===== */
:root{
    --primary:#ff6d5a;
    --primary-dark:#e5563f;
    --secondary:#1a1a2e;
    --accent:#e94560;
    --bg:#f5f5f7;
    --white:#ffffff;
    --text-dark:#2d2d3a;
    --text-body:#4a4a5a;
    --text-light:#8888a0;
    --border:#e2e2ea;
    --code-bg:#1e1e2e;
    --code-text:#e2e8f0;
    --green:#22c55e;
    --shadow-sm:0 1px 3px rgba(0,0,0,.06);
    --shadow:0 4px 16px rgba(26,26,46,.08);
    --shadow-lg:0 12px 32px rgba(26,26,46,.12);
    --radius:10px;
    --radius-lg:16px;
    --container:1100px;
    --font-heading:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
    --font-body:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
    --font-code:'JetBrains Mono','Fira Code',monospace;
    --header-h:68px;
}

/* ===== RESET ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-body);font-size:16px;line-height:1.7;color:var(--text-body);background:var(--bg);-webkit-font-smoothing:antialiased}
img,svg,video{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark)}
ul,ol{list-style:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea,select{font:inherit}
h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);color:var(--text-dark);line-height:1.3;font-weight:700;margin-bottom:.6em}
h1{font-size:clamp(1.8rem,4vw,2.6rem)}
h2{font-size:clamp(1.4rem,3vw,2rem)}
h3{font-size:clamp(1.15rem,2.4vw,1.45rem)}
h4{font-size:1.1rem}
p{margin-bottom:1em}

/* ===== LAYOUT ===== */
.container{max-width:var(--container);margin:0 auto;padding:0 20px}
.section{padding:60px 0}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{position:relative;display:inline-block;padding-bottom:12px}
.section-title h2::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:50px;height:3px;background:var(--primary);border-radius:2px}
.section-title p{color:var(--text-body);max-width:600px;margin:12px auto 0}

/* ===== TOP BAR ===== */
.top-bar{background:var(--secondary);color:rgba(255,255,255,.85);font-size:.82rem;padding:8px 0;text-align:center}
.top-bar strong{color:var(--primary)}

/* ===== HEADER ===== */
.site-header{position:sticky;top:0;z-index:100;background:var(--white);border-bottom:1px solid var(--border);transition:box-shadow .25s}
.site-header.scrolled{box-shadow:var(--shadow-sm)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}
.site-logo{font-family:var(--font-heading);font-size:1.35rem;font-weight:800;color:var(--secondary);letter-spacing:-.5px}
.site-logo span{color:var(--primary)}

/* ===== NAV ===== */
.main-navigation ul{display:flex;gap:26px;align-items:center}
.main-navigation a{color:var(--text-dark);font-weight:500;font-size:.92rem;position:relative;padding:6px 0}
.main-navigation a::after{content:'';position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--primary);transition:width .25s}
.main-navigation a:hover::after,.main-nav .current-menu-item>a::after,.main-nav .current_page_item>a::after{width:100%}
.menu-toggle{display:none;width:40px;height:40px;flex-direction:column;justify-content:center;align-items:center;gap:5px}
.menu-toggle span{width:22px;height:2px;background:var(--text-dark);transition:.3s}
.menu-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle.active span:nth-child(2){opacity:0}
.menu-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== HERO ===== */
.hero{background:linear-gradient(135deg,var(--secondary) 0%,#16213e 100%);color:#fff;padding:80px 0 90px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 20% 30%,rgba(255,109,90,.12) 0%,transparent 50%),radial-gradient(circle at 80% 70%,rgba(233,69,96,.08) 0%,transparent 50%)}
.hero-content{position:relative;z-index:1;max-width:750px;margin:0 auto;padding:0 20px}
.hero h1{color:#fff;margin-bottom:16px}
.hero .lead{font-size:1.1rem;opacity:.9;margin-bottom:28px;max-width:600px;margin-left:auto;margin-right:auto}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-badge{display:inline-block;margin-bottom:18px;padding:6px 16px;background:rgba(255,109,90,.15);border:1px solid rgba(255,109,90,.3);border-radius:50px;font-size:.82rem;color:var(--primary);font-weight:600}

/* ===== BUTTONS ===== */
.btn{display:inline-block;padding:12px 26px;border-radius:8px;font-weight:600;font-size:.95rem;transition:all .25s;cursor:pointer;text-align:center;border:2px solid transparent}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 14px rgba(255,109,90,.3)}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 6px 20px rgba(255,109,90,.4)}
.btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.btn-outline:hover{background:#fff;color:var(--secondary);border-color:#fff}
.btn-secondary{background:var(--secondary);color:#fff}
.btn-secondary:hover{background:#12122a;color:#fff}
.btn-sm{padding:8px 18px;font-size:.85rem}
.btn-lg{padding:15px 34px;font-size:1.05rem}
.btn-block{display:block;width:100%}

/* ===== CARDS ===== */
.card{background:var(--white);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--secondary);display:block;position:relative}
.card-thumb img{width:100%!important;height:100%!important;object-fit:cover!important;position:absolute;top:0;left:0;transition:transform .4s}
.card:hover .card-thumb img{transform:scale(1.04)}
.card-body{padding:22px}
.card-meta{font-size:.78rem;color:var(--text-light);margin-bottom:10px;text-transform:uppercase;letter-spacing:.5px}
.card-title{font-size:1.1rem;margin-bottom:10px}
.card-title a{color:var(--text-dark)}
.card-title a:hover{color:var(--primary)}
.card-excerpt{font-size:.9rem;margin-bottom:0;color:var(--text-body)}

/* ===== GRIDS ===== */
.grid-3{display:grid;grid-template-columns:1fr;gap:24px}
.grid-2{display:grid;grid-template-columns:1fr;gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}

/* ===== FEATURES ===== */
.feature-card{background:var(--white);padding:32px 24px;border-radius:var(--radius-lg);text-align:center;box-shadow:var(--shadow);border-top:3px solid var(--primary);transition:transform .25s}
.feature-card:hover{transform:translateY(-4px)}
.feature-card .icon{width:56px;height:56px;margin:0 auto 16px;background:rgba(255,109,90,.1);border-radius:14px;display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:1.5rem}
.feature-card h3{margin-bottom:8px;font-size:1.05rem}
.feature-card p{font-size:.9rem;margin-bottom:0}

/* ===== BREADCRUMBS ===== */
.breadcrumbs{padding:14px 0;font-size:.84rem;color:var(--text-light);background:var(--white);border-bottom:1px solid var(--border)}
.breadcrumbs a{color:var(--primary)}
.breadcrumbs .sep{margin:0 8px;opacity:.5}

/* ===== SINGLE POST ===== */
.single-layout{display:grid;grid-template-columns:1fr;gap:36px;padding:36px 0 60px}
.entry-header{margin-bottom:24px}
.entry-title{margin-bottom:12px}
.entry-meta{font-size:.84rem;color:var(--text-light)}
.entry-meta span{margin-right:14px}
.entry-thumbnail{margin-bottom:28px;border-radius:var(--radius-lg);overflow:hidden;aspect-ratio:16/9;position:relative}
.entry-thumbnail img{width:100%!important;height:100%!important;object-fit:cover!important;position:absolute;top:0;left:0}
.entry-content{font-size:1.02rem}
.entry-content h2{margin-top:1.6em;padding-bottom:8px;border-bottom:2px solid var(--border)}
.entry-content h3{margin-top:1.4em}
.entry-content img{border-radius:var(--radius);margin:1.2em 0}
.entry-content blockquote{border-left:4px solid var(--primary);padding:12px 20px;background:rgba(255,109,90,.04);margin:1.2em 0;font-style:italic;border-radius:0 8px 8px 0}
.entry-content ul,.entry-content ol{margin:0 0 1em 1.4em;list-style:disc}
.entry-content ol{list-style:decimal}
.entry-content li{margin-bottom:.4em}
.entry-content code{font-family:var(--font-code);background:var(--code-bg);color:var(--code-text);padding:2px 8px;border-radius:4px;font-size:.88em}
.entry-content pre{background:var(--code-bg);color:var(--code-text);padding:20px;border-radius:var(--radius);overflow-x:auto;margin:1.2em 0;font-family:var(--font-code);font-size:.88rem;line-height:1.6}
.entry-content pre code{background:none;padding:0;color:inherit}
.entry-content a{color:var(--primary);text-decoration:underline;text-decoration-color:rgba(255,109,90,.3);text-underline-offset:2px}
.entry-content a:hover{text-decoration-color:var(--primary)}
.entry-content table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:.92rem}
.entry-content th,.entry-content td{padding:10px 14px;border:1px solid var(--border);text-align:left}
.entry-content th{background:var(--secondary);color:#fff;font-weight:600}
.entry-content tr:nth-child(even){background:rgba(0,0,0,.02)}

/* ===== ARCHIVE ===== */
.archive-header{background:var(--white);padding:50px 0;text-align:center;border-bottom:1px solid var(--border)}
.archive-header h1{margin-bottom:8px}
.archive-header p{color:var(--text-body);max-width:600px;margin:0 auto}

/* ===== SIDEBAR ===== */
.sidebar{background:var(--white);padding:24px;border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}
.widget{margin-bottom:30px}
.widget:last-child{margin-bottom:0}
.widget-title{font-size:1.05rem;margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid var(--primary)}

/* ===== FOOTER ===== */
.site-footer{background:var(--secondary);color:rgba(255,255,255,.7);padding:60px 0 0;margin-top:60px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px;margin-bottom:40px}
.footer-col h4{color:#fff;margin-bottom:16px;font-size:1.05rem}
.footer-col p,.footer-col a{font-size:.88rem;color:rgba(255,255,255,.7)}
.footer-col a:hover{color:var(--primary)}
.footer-col ul li{margin-bottom:8px}
.footer-disclaimer{font-size:.78rem;opacity:.55;text-align:center;margin-bottom:16px;line-height:1.6}
.footer-bottom{text-align:center;padding:20px 0;border-top:1px solid rgba(255,255,255,.1);font-size:.84rem}

/* ===== SEARCH ===== */
.search-form{display:flex;gap:8px}
.search-form input[type=search]{flex:1;padding:10px 14px;border:1px solid var(--border);border-radius:8px;background:var(--bg)}
.search-form button{padding:10px 18px;background:var(--primary);color:#fff;border-radius:8px;font-weight:600}
.search-form button:hover{background:var(--primary-dark)}

/* ===== 404 ===== */
.error-404{text-align:center;padding:80px 0}
.error-404 .big{font-size:7rem;font-family:var(--font-heading);color:var(--primary);line-height:1;margin-bottom:10px;font-weight:800}

/* ===== CTA SHORTCODE ===== */
.n8n-cta-wrap{text-align:center;margin:28px 0}
.n8n-cta{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff!important;font-weight:700;border-radius:10px;text-decoration:none!important;font-size:1rem;box-shadow:0 4px 16px rgba(255,109,90,.35);transition:transform .2s,box-shadow .2s}
.n8n-cta:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(255,109,90,.45);color:#fff!important}
.n8n-cta svg{width:18px;height:18px;flex-shrink:0}
.n8n-cta-trust{font-size:.72rem;color:var(--text-light);margin-top:6px;text-align:center}

/* ===== PAGINATION ===== */
.pagination{display:flex;gap:6px;justify-content:center;margin-top:40px}
.pagination a,.pagination span{padding:8px 14px;border-radius:6px;font-size:.9rem;font-weight:500}
.pagination a{background:var(--white);color:var(--text-dark);border:1px solid var(--border)}
.pagination a:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.pagination .current{background:var(--primary);color:#fff}

/* ===== UTILITIES ===== */
.text-center{text-align:center}
.mt-0{margin-top:0}
.mb-0{margin-bottom:0}

/* ===== RESPONSIVE: TABLET ===== */
@media(min-width:600px){
    .grid-3{grid-template-columns:repeat(2,1fr)}
    .grid-2{grid-template-columns:repeat(2,1fr)}
    .grid-4{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:repeat(2,1fr)}
}

/* ===== RESPONSIVE: DESKTOP ===== */
@media(min-width:900px){
    .grid-3{grid-template-columns:repeat(3,1fr)}
    .grid-4{grid-template-columns:repeat(4,1fr)}
    .footer-grid{grid-template-columns:2fr 1fr 1fr}
    .single-layout.has-sidebar{grid-template-columns:1fr 300px}
}

/* ===== RESPONSIVE: MOBILE NAV ===== */
@media(max-width:899px){
    .menu-toggle{display:flex}
    .main-navigation{position:fixed;top:var(--header-h);left:0;right:0;background:var(--white);box-shadow:var(--shadow);max-height:0;overflow:hidden;transition:max-height .3s}
    .main-navigation.open{max-height:80vh}
    .main-navigation ul{flex-direction:column;gap:0;padding:10px 20px}
    .main-navigation li{border-bottom:1px solid var(--border)}
    .main-navigation li:last-child{border-bottom:none}
    .main-navigation a{display:block;padding:14px 0}
    .hero{padding:50px 0 60px}
}

/* ===== FLOATING WIDGET ===== */
.n8n-float{position:fixed;bottom:24px;right:24px;z-index:190;opacity:0;transform:translateY(20px);transition:all .4s;pointer-events:none;display:flex;flex-direction:column;align-items:center;gap:10px}
.n8n-float.show{opacity:1;transform:translateY(0);pointer-events:auto}
.n8n-float-btn{width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(0,0,0,.2);cursor:pointer;transition:transform .2s;text-decoration:none}
.n8n-float-btn:hover{transform:scale(1.1)}
.n8n-float-cloud{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff}
.n8n-float-hosting{background:var(--secondary);color:#fff}

/* ===== EXIT INTENT POPUP ===== */
.n8n-exit-overlay{display:none;position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,.6);align-items:center;justify-content:center}
.n8n-exit-overlay.show{display:flex}
.n8n-exit-box{background:#fff;border-radius:20px;padding:40px 36px;max-width:440px;width:90%;text-align:center;position:relative;animation:qfadein .3s;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.n8n-exit-box h3{font-family:var(--font-heading);color:var(--secondary);font-size:1.35rem;margin:0 0 12px}
.n8n-exit-box p{color:var(--text-body);margin:0 0 24px;font-size:.95rem}
.n8n-exit-close{position:absolute;top:12px;right:16px;background:none;border:none;font-size:1.5rem;color:#999;cursor:pointer}
.n8n-exit-close:hover{color:#333}
.n8n-exit-cta{display:inline-flex;align-items:center;gap:8px;padding:16px 32px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-weight:700;border-radius:10px;text-decoration:none;font-size:1.05rem;box-shadow:0 4px 16px rgba(255,109,90,.35);transition:transform .2s}
.n8n-exit-cta:hover{transform:translateY(-2px);color:#fff}
.n8n-exit-proof{margin-top:14px;font-size:.82rem;color:#999}
@media(max-width:899px){.n8n-exit-overlay{display:none!important}}

/* ===== SOCIAL PROOF ===== */
.n8n-social-proof{position:fixed;bottom:24px;left:24px;z-index:180;width:320px;max-width:90vw;background:#fff;border-radius:10px;box-shadow:0 6px 24px rgba(0,0,0,.12);border-left:4px solid var(--primary);padding:14px 16px;display:flex;align-items:center;gap:12px;transform:translateX(-120%);opacity:0;transition:transform .4s,opacity .4s;pointer-events:none}
.n8n-social-proof.show{transform:translateX(0);opacity:1;pointer-events:auto}
.n8n-social-proof .sp-avatar{width:40px;height:40px;border-radius:50%;background:rgba(255,109,90,.1);color:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;flex-shrink:0}
.n8n-social-proof .sp-body{flex:1;min-width:0}
.n8n-social-proof .sp-name{font-size:.82rem;font-weight:600;color:var(--text-dark)}
.n8n-social-proof .sp-action{font-size:.78rem;color:var(--text-body);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.n8n-social-proof .sp-time{font-size:.7rem;color:var(--text-light);margin-top:2px}
.n8n-social-proof .sp-check{color:var(--green);font-size:.75rem;flex-shrink:0}

/* ===== STICKY CTA MOBILE ===== */
.sticky-cta{display:none;position:fixed;bottom:0;left:0;right:0;z-index:200;background:var(--white);box-shadow:0 -4px 20px rgba(0,0,0,.1);padding:10px 16px;align-items:center;gap:10px}
.sticky-cta.visible{display:flex}
.sticky-cta .info{flex:1;min-width:0}
.sticky-cta .info .name{font-size:.82rem;font-weight:600;color:var(--text-dark);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sticky-cta .btn{flex-shrink:0;white-space:nowrap}

/* ===== KEYFRAMES ===== */
@keyframes qfadein{from{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}
/* ===== MOBILE RESPONSIVE FIX v2 ===== */
html, body {
    overflow-x: hidden !important;
    max-width: 100vw !important;
}
*, *::before, *::after {
    box-sizing: border-box;
}
img, video, iframe, embed, object {
    max-width: 100% !important;
    height: auto !important;
}
pre, code {
    overflow-x: auto;
    white-space: pre-wrap !important;
    word-break: break-all !important;
}
table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    max-width: 100%;
}

@media (max-width: 768px) {
    /* Sidebar xuống dưới content */
    .single-layout.has-sidebar {
        display: block !important;
        grid-template-columns: 1fr !important;
    }
    .single-layout .content-area {
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
    }
    .single-layout .sidebar {
        width: 100% !important;
        max-width: 100% !important;
        margin-top: 2rem;
    }
    /* Container padding */
    .container,
    .site-main,
    .content-area,
    .entry-content,
    .entry-header,
    .entry-thumbnail {
        padding-left: 0.3rem !important;
        padding-right: 0.3rem !important;
        max-width: 100vw !important;
        overflow-x: hidden !important;
    }
    /* Tiêu đề nhỏ lại */
    .entry-title, h1 {
        font-size: 1.5rem !important;
        line-height: 1.3 !important;
        word-wrap: break-word !important;
    }
    h2 { font-size: 1.25rem !important; }
    h3 { font-size: 1.1rem !important; }
    /* Ảnh fit */
    .entry-thumbnail img,
    .entry-content img,
    .post-thumbnail img {
        width: 100% !important;
        height: auto !important;
        border-radius: 8px;
    }
    /* Related posts 1 cột */
    .grid-3 {
        grid-template-columns: 1fr !important;
    }
    /* Card images */
    .card-thumb img {
        width: 100% !important;
        height: auto !important;
    }
    /* Breadcrumb wrap */
    .breadcrumbs {
        font-size: 0.8rem;
        padding: 8px 1rem !important;
    }
    .breadcrumbs .container {
        padding: 0 !important;
    }
    /* CTA inline không tràn */
    .n8n-cta-wrap {
        max-width: 100% !important;
    }
    .n8n-cta {
        max-width: 100% !important;
        box-sizing: border-box !important;
    }
}