:root {
    --bg-dark: #0d1117;
    --bg-soft: #10151d;
    --card-bg: #161b22;
    --primary: #58a6ff;
    --primary-2: #7c5cff;
    --accent: #2dd4bf;
    --text-main: #8b949e;
    --text-bright: #c9d1d9;
    --border: #232a35;
    --gradient: linear-gradient(120deg, #58a6ff 0%, #7c5cff 100%);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0; padding: 0; box-sizing: border-box;
}
html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.7;
    overflow-x: hidden;
}

::selection { background: rgba(124,92,255,0.35); color: #fff; }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: #2a323d; border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* Scroll progress */
.scroll-progress {
    position: fixed; top: 0; left: 0; height: 3px; width: 0%;
    background: var(--gradient); z-index: 2000;
    box-shadow: 0 0 12px rgba(88,166,255,0.7);
}

/* Nav */
nav {
    position: fixed; top: 0; width: 100%; padding: 18px 6%;
    background: rgba(13, 17, 23, 0.72); backdrop-filter: blur(14px);
    display: flex; justify-content: space-between; align-items: center;
    z-index: 1000; border-bottom: 1px solid transparent;
    transition: var(--transition);
}
nav.scrolled { padding: 12px 6%; background: rgba(13,17,23,0.92); border-bottom: 1px solid var(--border); box-shadow: 0 8px 30px rgba(0,0,0,0.35); }

.logo { font-family: 'Space Grotesk', sans-serif; font-weight: 700; font-size: 1.15rem; color: #fff; letter-spacing: 0.5px; text-decoration: none; }
.logo span { background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

.nav-links { list-style: none; display: flex; gap: 30px; }
.nav-links a { color: var(--text-bright); text-decoration: none; font-size: 0.92rem; font-weight: 500; position: relative; transition: var(--transition); }
.nav-links a::after { content: ''; position: absolute; left: 0; bottom: -6px; height: 2px; width: 0; background: var(--gradient); transition: var(--transition); }
.nav-links a:hover, .nav-links a.active { color: #fff; }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.nav-cta { display: inline-block; padding: 9px 20px; background: var(--gradient); color: #fff; text-decoration: none; border-radius: 8px; font-size: 0.85rem; font-weight: 600; transition: var(--transition); box-shadow: 0 6px 18px rgba(88,166,255,0.25); }
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(124,92,255,0.4); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 4px; }
.nav-toggle span { width: 26px; height: 2px; background: var(--text-bright); border-radius: 2px; transition: var(--transition); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero */
header {
    position: relative; min-height: 100vh; display: flex; flex-direction: column;
    justify-content: center; align-items: center; text-align: center;
    padding: 130px 8% 70px; overflow: hidden;
    background: radial-gradient(circle at 70% 20%, #1a2030 0%, var(--bg-dark) 70%);
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-glow { position: absolute; top: -10%; left: 55%; width: 700px; height: 700px; background: radial-gradient(circle, rgba(124,92,255,0.22), transparent 60%); filter: blur(20px); animation: floatGlow 12s ease-in-out infinite; }
.hero-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(88,166,255,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(88,166,255,0.05) 1px, transparent 1px); background-size: 42px 42px; mask-image: radial-gradient(circle at center, #000 30%, transparent 78%); }
@keyframes floatGlow { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(-40px, 40px) scale(1.1); } }

.hero-content { position: relative; z-index: 1; display: flex; align-items: center; gap: 60px; max-width: 1150px; width: 100%; }
.hero-text { flex: 1; text-align: left; animation: fadeUp 0.9s ease both; }
.hero-image { flex: 0 0 40%; position: relative; animation: fadeUp 0.9s 0.15s ease both; }

.hero-image-frame { position: relative; border-radius: 20px; padding: 6px; background: var(--gradient); box-shadow: 0 25px 60px rgba(0,0,0,0.55); }
.hero-image-frame::before { content: ''; position: absolute; inset: -2px; border-radius: 22px; background: var(--gradient); filter: blur(22px); opacity: 0.5; z-index: -1; }
.hero-image-frame img { width: 100%; display: block; border-radius: 15px; transition: var(--transition); }
.hero-image:hover .hero-image-frame { transform: translateY(-6px); }

.hero-float-card { position: absolute; bottom: 22px; left: -28px; display: flex; align-items: center; gap: 12px; background: rgba(22,27,34,0.9); backdrop-filter: blur(10px); border: 1px solid var(--border); padding: 12px 18px; border-radius: 14px; box-shadow: 0 14px 30px rgba(0,0,0,0.4); animation: floatCard 4s ease-in-out infinite; }
.hero-float-card i { color: var(--accent); font-size: 1.5rem; }
.hero-float-card strong { display: block; color: #fff; font-size: 0.9rem; }
.hero-float-card small { color: var(--text-main); font-size: 0.75rem; }
@keyframes floatCard { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

.hero-badge { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--border); background: rgba(88,166,255,0.06); color: var(--primary); padding: 7px 16px; border-radius: 30px; font-size: 0.72rem; font-weight: 600; letter-spacing: 0.5px; margin-bottom: 22px; }
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 rgba(45,212,191,0.6); animation: pulse 1.8s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(45,212,191,0.6); } 70% { box-shadow: 0 0 0 10px rgba(45,212,191,0); } 100% { box-shadow: 0 0 0 0 rgba(45,212,191,0); } }

header h1 { font-family: 'Space Grotesk', sans-serif; font-size: clamp(2.6rem, 7vw, 4.6rem); line-height: 1.05; color: #fff; margin-bottom: 14px; letter-spacing: -1px; }
.gradient-text { background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-subtitle { font-size: clamp(1.1rem, 2.5vw, 1.5rem); color: var(--text-bright); font-weight: 600; margin-bottom: 20px; }
.hero-subtitle .sep { color: var(--primary); margin: 0 6px; }
.hero-description { max-width: 620px; margin-bottom: 32px; font-size: 1.02rem; }

.hero-tech { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.hero-tech span { font-size: 0.78rem; color: var(--text-bright); background: rgba(255,255,255,0.03); border: 1px solid var(--border); padding: 6px 14px; border-radius: 20px; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }

/* Stats */
.stats-section { padding: 0 8%; margin-top: -50px; margin-bottom: 40px; position: relative; z-index: 5; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; max-width: 1000px; margin: 0 auto; background: linear-gradient(180deg, rgba(22,27,34,0.9), rgba(16,21,29,0.9)); border: 1px solid var(--border); border-radius: 20px; padding: 36px 24px; backdrop-filter: blur(10px); box-shadow: 0 20px 50px rgba(0,0,0,0.4); }
.stat { text-align: center; position: relative; }
.stat:not(:last-child)::after { content: ''; position: absolute; right: -12px; top: 15%; height: 70%; width: 1px; background: var(--border); }
.stat-number { font-family: 'Space Grotesk', sans-serif; font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 700; background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { font-size: 0.85rem; color: var(--text-main); margin-top: 4px; }

/* Sections */
section { padding: 90px 8%; }
.section-head { max-width: 700px; margin: 0 auto 55px; text-align: center; }
.section-tagline { display: inline-block; font-size: 0.78rem; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--primary); margin-bottom: 12px; }
.section-title { font-family: 'Space Grotesk', sans-serif; color: #fff; font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 14px; letter-spacing: -0.5px; }
.section-desc { color: var(--text-main); font-size: 1.02rem; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 28px; max-width: 1150px; margin: 0 auto; }

/* About */
#about { background: linear-gradient(180deg, var(--bg-dark), var(--bg-soft)); }
.about-wrap { max-width: 1150px; margin: 0 auto; display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 60px; align-items: center; }
.about-visual { position: relative; }
.about-image-frame { position: relative; border-radius: 20px; padding: 6px; background: var(--gradient); box-shadow: 0 25px 55px rgba(0,0,0,0.5); }
.about-image-frame::before { content: ''; position: absolute; inset: -2px; border-radius: 22px; background: var(--gradient); filter: blur(24px); opacity: 0.4; z-index: -1; }
.about-image-frame img { width: 100%; display: block; border-radius: 15px; }
.about-exp-card { position: absolute; right: -22px; bottom: 28px; display: flex; align-items: center; gap: 12px; background: rgba(22,27,34,0.92); backdrop-filter: blur(10px); border: 1px solid var(--border); padding: 16px 20px; border-radius: 16px; box-shadow: 0 16px 34px rgba(0,0,0,0.45); }
.about-exp-num { font-family: 'Space Grotesk', sans-serif; font-size: 2rem; font-weight: 700; background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.about-exp-text { font-size: 0.8rem; color: var(--text-bright); line-height: 1.3; }

.about-body .section-tagline { margin-bottom: 10px; }
.about-body .section-title { margin-bottom: 18px; }
.about-lead { color: var(--text-bright); font-size: 1.1rem; font-weight: 500; margin-bottom: 16px; }
.about-body > p { margin-bottom: 16px; }

.about-edu, .about-skills { margin-top: 26px; }
.about-edu h3, .about-skills h3 { font-family: 'Space Grotesk', sans-serif; color: #fff; font-size: 1.05rem; margin-bottom: 14px; display: flex; align-items: center; gap: 10px; }
.about-edu h3 i, .about-skills h3 i { color: var(--primary); }
.about-edu ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.about-edu li { position: relative; padding-left: 22px; color: var(--text-bright); }
.about-edu li::before { content: '\f19d'; font-family: 'Font Awesome 6 Free'; font-weight: 900; position: absolute; left: 0; top: 2px; color: var(--primary); font-size: 0.85rem; }
.about-edu li strong { color: #fff; }

.skill { margin-bottom: 16px; }
.skill-head { display: flex; justify-content: space-between; font-size: 0.88rem; color: var(--text-bright); margin-bottom: 8px; }
.skill-bar { height: 8px; background: rgba(255,255,255,0.05); border: 1px solid var(--border); border-radius: 20px; overflow: hidden; }
.skill-fill { display: block; height: 100%; width: 0; border-radius: 20px; background: var(--gradient); box-shadow: 0 0 12px rgba(88,166,255,0.5); transition: width 1.3s cubic-bezier(0.4, 0, 0.2, 1); }
.reveal.active .skill-fill { width: var(--pct); }

.about-btns { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }

/* Cards */
.card { position: relative; background: var(--card-bg); padding: 36px; border-radius: 16px; border: 1px solid var(--border); transition: var(--transition); overflow: hidden; }
.card::before { content: ''; position: absolute; inset: 0; border-radius: 16px; padding: 1px; background: var(--gradient); -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0); -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: var(--transition); }
.card:hover { transform: translateY(-8px); box-shadow: 0 18px 40px rgba(0,0,0,0.45); }
.card:hover::before { opacity: 1; }
.card-icon { font-size: 2.6rem; margin-bottom: 18px; display: inline-block; }
.card:hover .card-icon { transform: scale(1.12) rotate(-4deg); transition: var(--transition); }
.card h3 { font-family: 'Space Grotesk', sans-serif; color: #fff; margin-bottom: 14px; font-size: 1.2rem; }

/* Project cards */
.project-card { padding: 0; display: flex; flex-direction: column; }
.project-thumb { position: relative; overflow: hidden; }
.project-thumb img { width: 100%; height: 200px; object-fit: cover; display: block; transition: var(--transition); }
.project-card:hover .project-thumb img { transform: scale(1.06); }
.project-thumb .tag { position: absolute; top: 14px; left: 14px; }
.project-body { padding: 28px; }
.project-icon { font-size: 2.4rem; margin-bottom: 16px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 28px; background: var(--gradient); color: #fff; text-decoration: none; border-radius: 10px; font-weight: 600; font-size: 0.95rem; transition: var(--transition); box-shadow: 0 8px 22px rgba(88,166,255,0.28); }
.btn:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(124,92,255,0.45); }
.btn i { font-size: 0.85rem; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-bright); box-shadow: none; }
.btn-outline:hover { border-color: var(--primary); color: #fff; background: rgba(88,166,255,0.08); box-shadow: none; }
.btn-zalo { background: #0068ff; box-shadow: 0 8px 22px rgba(0,104,255,0.3); }
.hero-btns { display: flex; flex-wrap: wrap; gap: 14px; }

/* Contact */
.contact-box { max-width: 780px; margin: 0 auto; text-align: center; background: linear-gradient(160deg, #171d27, #10151d); border: 1px solid var(--border); border-radius: 24px; padding: 60px 40px; position: relative; overflow: hidden; }
.contact-box::before { content: ''; position: absolute; top: -50%; left: 50%; transform: translateX(-50%); width: 500px; height: 500px; background: radial-gradient(circle, rgba(124,92,255,0.15), transparent 65%); }
.contact-box > * { position: relative; z-index: 1; }
.contact-box h2 { font-family: 'Space Grotesk', sans-serif; color: #fff; font-size: clamp(1.8rem, 4vw, 2.4rem); margin-bottom: 14px; }
.contact-main { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-top: 32px; }

/* Social */
.social-links { margin-top: 34px; display: flex; gap: 18px; justify-content: center; }
.social-links a { width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; border-radius: 12px; background: rgba(255,255,255,0.03); border: 1px solid var(--border); font-size: 1.3rem; color: var(--text-bright); transition: var(--transition); }
.social-links a:hover { transform: translateY(-5px); color: #fff; border-color: var(--primary); }
.social-links a:hover .fa-facebook-f, .fa-facebook-f:hover { color: #1877f2; }
.social-links a:hover .fa-tiktok, .fa-tiktok:hover { color: #ff0050; }
.social-links a:hover .fa-youtube, .fa-youtube:hover { color: #ff0000; }

/* Footer */
footer { padding: 60px 8% 40px; text-align: center; border-top: 1px solid var(--border); font-size: 0.85rem; }
.footer-logo { font-family: 'Space Grotesk', sans-serif; font-weight: 700; font-size: 1.2rem; color: #fff; margin-bottom: 14px; }
.footer-logo span { background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.footer-tagline { margin-top: 8px; font-style: italic; color: var(--primary); }

/* Tags */
.tag { display: inline-block; font-size: 0.7rem; font-weight: 600; background: rgba(13,17,23,0.75); backdrop-filter: blur(6px); color: var(--text-bright); padding: 5px 12px; border-radius: 20px; border: 1px solid var(--border); }
.tag-active { background: var(--gradient); color: #fff; border-color: transparent; }

/* Back to top */
.back-to-top { position: fixed; right: 28px; bottom: 28px; width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; border-radius: 50%; background: var(--gradient); color: #fff; text-decoration: none; box-shadow: 0 10px 26px rgba(124,92,255,0.4); opacity: 0; visibility: hidden; transform: translateY(20px); transition: var(--transition); z-index: 900; }
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); }

/* Reveal Animation */
.reveal { opacity: 0; transform: translateY(40px); transition: 0.8s all cubic-bezier(0.4, 0, 0.2, 1); }
.reveal.active { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 900px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .stat:nth-child(2)::after { display: none; }
}
@media (max-width: 768px) {
    .nav-cta { display: none; }
    .nav-toggle { display: flex; }
    .nav-links {
        position: fixed; top: 68px; right: 0; height: calc(100vh - 68px);
        width: 74%; max-width: 300px; flex-direction: column; gap: 8px;
        background: rgba(13,17,23,0.98); backdrop-filter: blur(16px);
        padding: 30px; transform: translateX(105%); transition: var(--transition);
        border-left: 1px solid var(--border);
    }
    .nav-links.open { transform: translateX(0); }
    .nav-links a { font-size: 1.05rem; padding: 10px 0; display: block; }

    .hero-content { flex-direction: column-reverse; gap: 45px; text-align: center; }
    .hero-text { text-align: center; }
    .hero-image { flex: 0 0 auto; max-width: 300px; }
    .hero-btns, .hero-tech { justify-content: center; }
    .hero-float-card { left: 50%; transform: translateX(-50%); bottom: -22px; }

    .about-wrap { grid-template-columns: 1fr; gap: 50px; }
    .about-visual { max-width: 360px; margin: 0 auto; }
    .about-btns { justify-content: center; }
}
@media (max-width: 560px) {
    section { padding: 70px 6%; }
    .stats-grid { grid-template-columns: 1fr 1fr; padding: 26px 16px; gap: 26px 10px; }
    .stat::after { display: none !important; }
    .contact-box { padding: 45px 22px; }
    .card { padding: 28px; }
    .about-exp-card { right: 50%; transform: translateX(50%); }
}

/* ============================================================
   BLOG - NEWS FEED (phong cách Facebook, Dark mode)
   ============================================================ */
:root {
    --fb-blue: #2d88ff;
    --fb-card: #242526;
    --fb-hover: #3a3b3c;
    --fb-border: #393a3b;
    --fb-text: #e4e6eb;
    --fb-text-2: #b0b3b8;
    --fb-feed-w: 620px;
}

.blog-hero {
    position: relative; min-height: 40vh; display: flex; align-items: center;
    justify-content: center; text-align: center; overflow: hidden;
    padding: 130px 8% 50px; background: radial-gradient(circle at 70% 20%, #1a2030 0%, var(--bg-dark) 70%);
}
.blog-hero-content { position: relative; z-index: 1; max-width: 720px; animation: fadeUp 0.9s ease both; }
.blog-hero h1 { font-family: 'Space Grotesk', sans-serif; font-size: clamp(2.2rem, 6vw, 3.6rem); color: #fff; margin: 12px 0 16px; letter-spacing: -1px; }
.blog-hero p { font-size: 1.05rem; }

.blog-main { max-width: var(--fb-feed-w); margin: 0 auto; padding: 34px 16px 90px; }

/* Bố cục 3 cột kiểu Facebook */
.fb-layout {
    display: grid;
    grid-template-columns: 280px minmax(0, var(--fb-feed-w)) 300px;
    gap: 24px; justify-content: center; align-items: start;
    max-width: 1300px; margin: 0 auto; padding: 30px 20px 90px;
}
.fb-center { min-width: 0; }
.fb-center .blog-grid { max-width: 100%; }
.fb-side { position: sticky; top: 84px; display: flex; flex-direction: column; gap: 16px; }

/* Card hồ sơ (cột trái) */
.fb-profile-card { background: var(--fb-card); border: 1px solid var(--fb-border); border-radius: 12px; overflow: hidden; text-align: center; padding-bottom: 12px; }
.fb-profile-cover { height: 80px; background: linear-gradient(120deg, #1e3a5f 0%, #2d88ff 60%, #7c5cff 100%); }
.fb-profile-avatar { width: 84px; height: 84px; border-radius: 50%; object-fit: cover; border: 4px solid var(--fb-card); margin: -42px auto 8px; display: block; }
.fb-profile-name { font-family: 'Space Grotesk', sans-serif; font-size: 1.08rem; color: var(--fb-text); display: flex; align-items: center; justify-content: center; gap: 6px; }
.fb-profile-name .fa-circle-check { color: var(--fb-blue); font-size: 0.78rem; }
.fb-profile-role { font-size: 0.82rem; color: var(--fb-text-2); margin: 4px 14px 14px; line-height: 1.4; }
.fb-quicknav { display: flex; flex-direction: column; gap: 2px; padding: 0 8px; text-align: left; }
.fb-quicknav a { display: flex; align-items: center; gap: 12px; padding: 9px 12px; border-radius: 8px; color: var(--fb-text); text-decoration: none; font-size: 0.9rem; font-weight: 600; transition: var(--transition); }
.fb-quicknav a i { width: 20px; text-align: center; color: var(--fb-text-2); font-size: 1rem; transition: var(--transition); }
.fb-quicknav a:hover { background: var(--fb-hover); }
.fb-quicknav a.active { background: rgba(45,136,255,0.16); color: #7ab5ff; }
.fb-quicknav a.active i { color: #7ab5ff; }

/* Widget (cột phải) */
.fb-widget { background: var(--fb-card); border: 1px solid var(--fb-border); border-radius: 12px; padding: 16px; }
.fb-widget-title { font-family: 'Space Grotesk', sans-serif; font-size: 1rem; color: var(--fb-text); margin-bottom: 10px; }
.fb-widget-text { font-size: 0.86rem; color: var(--fb-text-2); line-height: 1.55; margin-bottom: 12px; }
.fb-widget-list { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.fb-widget-list li { display: flex; align-items: center; gap: 10px; font-size: 0.86rem; color: var(--fb-text); }
.fb-widget-list li i { width: 18px; text-align: center; color: var(--fb-blue); }
.fb-widget-btn { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 10px; margin-bottom: 8px; border-radius: 8px; background: rgba(45,136,255,0.16); color: #7ab5ff; text-decoration: none; font-weight: 600; font-size: 0.9rem; transition: var(--transition); }
.fb-widget-btn:hover { background: rgba(45,136,255,0.28); }
.fb-widget-btn-zalo { background: rgba(0,102,255,0.14); color: #5aa8ff; }
.fb-widget-social { display: flex; gap: 8px; margin-top: 4px; }
.fb-widget-social a { flex: 1; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: 8px; background: var(--fb-hover); color: var(--fb-text); text-decoration: none; font-size: 1rem; transition: var(--transition); }
.fb-widget-social a:hover { background: var(--fb-blue); color: #fff; }

/* Cover + avatar kiểu trang cá nhân Facebook */
.fb-cover { max-width: 1100px; margin: 0 auto; padding: 66px 20px 0; }
.fb-cover-photo { height: 260px; border-radius: 0 0 14px 14px; position: relative; overflow: hidden; background: linear-gradient(120deg, #14243a 0%, #1e5aa8 45%, #2d88ff 75%, #7c5cff 100%); }
.fb-cover-photo::after { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px); background-size: 40px 40px; mask-image: radial-gradient(circle at 70% 30%, #000 20%, transparent 75%); }
.fb-cover-bar { display: flex; align-items: flex-end; gap: 18px; padding: 0 24px 18px; margin-top: -46px; position: relative; z-index: 1; border-bottom: 1px solid var(--fb-border); }
.fb-cover-avatar { width: 150px; height: 150px; border-radius: 50%; object-fit: cover; border: 5px solid var(--bg-dark); flex-shrink: 0; box-shadow: 0 6px 20px rgba(0,0,0,0.4); }
.fb-cover-info { flex-grow: 1; padding-bottom: 6px; }
.fb-cover-info h1 { font-family: 'Space Grotesk', sans-serif; font-size: clamp(1.6rem, 4vw, 2.1rem); color: #fff; display: flex; align-items: center; gap: 8px; letter-spacing: -0.5px; }
.fb-cover-info h1 .fa-circle-check { color: var(--fb-blue); font-size: 1rem; }
.fb-cover-info p { font-size: 0.92rem; color: var(--fb-text-2); margin-top: 4px; }
.fb-cover-actions { display: flex; gap: 8px; padding-bottom: 8px; }
.fb-cover-btn { display: inline-flex; align-items: center; gap: 7px; padding: 9px 16px; border-radius: 8px; background: var(--fb-hover); color: var(--fb-text); text-decoration: none; font-weight: 600; font-size: 0.9rem; transition: var(--transition); white-space: nowrap; }
.fb-cover-btn:hover { filter: brightness(1.15); }
.fb-cover-btn-primary { background: var(--fb-blue); color: #fff; }

/* Ô soạn nhanh (composer) */
.fb-composer { background: var(--fb-card); border: 1px solid var(--fb-border); border-radius: 12px; padding: 12px 14px 6px; margin-bottom: 18px; }
.fb-composer-top { display: flex; align-items: center; gap: 10px; padding-bottom: 12px; border-bottom: 1px solid var(--fb-border); }
.fb-composer-avatar { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.fb-composer-input { flex-grow: 1; padding: 10px 18px; background: var(--fb-hover); border-radius: 30px; color: var(--fb-text-2); text-decoration: none; font-size: 0.94rem; transition: var(--transition); }
.fb-composer-input:hover { background: #45464a; }
.fb-composer-actions { display: flex; padding: 4px 0; }
.fb-composer-actions a { flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 9px 4px; border-radius: 8px; color: var(--fb-text-2); text-decoration: none; font-weight: 600; font-size: 0.88rem; transition: var(--transition); }
.fb-composer-actions a:hover { background: var(--fb-hover); }
.fb-composer-actions a i { font-size: 1.05rem; }
.fb-composer-actions a:nth-child(1) i { color: #f3425f; }
.fb-composer-actions a:nth-child(2) i { color: #2d88ff; }
.fb-composer-actions a:nth-child(3) i { color: #45bd62; }

/* Thanh công cụ kiểu Facebook */
.blog-toolbar { display: flex; flex-direction: column; gap: 14px; margin-bottom: 22px; }
.blog-search { position: relative; display: flex; align-items: center; order: -1; }
.blog-search i { position: absolute; left: 18px; color: var(--fb-text-2); font-size: 0.95rem; }
.blog-search input { width: 100%; padding: 12px 18px 12px 46px; background: var(--fb-card); border: 1px solid var(--fb-border); border-radius: 30px; color: var(--fb-text); font-family: 'Inter', sans-serif; font-size: 0.95rem; transition: var(--transition); }
.blog-search input:focus { outline: none; border-color: var(--fb-blue); box-shadow: 0 0 0 3px rgba(45,136,255,0.18); }
.blog-search input::placeholder { color: var(--fb-text-2); }

.blog-filters { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-chip { font-family: 'Inter', sans-serif; font-size: 0.85rem; font-weight: 600; color: var(--fb-text); background: var(--fb-card); border: 1px solid var(--fb-border); padding: 8px 16px; border-radius: 30px; cursor: pointer; transition: var(--transition); }
.filter-chip:hover { background: var(--fb-hover); }
.filter-chip.active { background: rgba(45,136,255,0.18); border-color: var(--fb-blue); color: #7ab5ff; }

/* Feed dạng cột dọc */
.blog-grid, .latest-grid { display: flex; flex-direction: column; gap: 18px; max-width: var(--fb-feed-w); margin: 0 auto; }

/* Bài viết dạng post Facebook */
.fb-post { background: var(--fb-card); border: 1px solid var(--fb-border); border-radius: 12px; overflow: hidden; box-shadow: 0 1px 2px rgba(0,0,0,0.3); animation: fadeUp 0.5s ease both; }

.fb-post-head { display: flex; align-items: center; gap: 10px; padding: 12px 14px 10px; }
.fb-avatar { width: 42px; height: 42px; border-radius: 50%; object-fit: cover; flex-shrink: 0; border: 1px solid var(--fb-border); }
.fb-post-headinfo { display: flex; flex-direction: column; line-height: 1.3; min-width: 0; flex-grow: 1; }
.fb-author { font-family: 'Inter', sans-serif; font-weight: 700; font-size: 0.95rem; color: var(--fb-text); display: inline-flex; align-items: center; gap: 6px; }
.fb-author .fa-circle-check { color: var(--fb-blue); font-size: 0.8rem; }
.fb-post-time { font-size: 0.78rem; color: var(--fb-text-2); display: flex; align-items: center; gap: 5px; flex-wrap: wrap; }
.fb-post-time .fa-earth-asia { font-size: 0.72rem; }
.fb-cat-chip { color: var(--fb-blue); font-weight: 600; }
.fb-post-more { background: none; border: 0; color: var(--fb-text-2); font-size: 1.1rem; width: 34px; height: 34px; border-radius: 50%; cursor: pointer; transition: var(--transition); flex-shrink: 0; }
.fb-post-more:hover { background: var(--fb-hover); }

.fb-post-text { padding: 0 14px 12px; }
.fb-post-title { display: block; font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 1.12rem; line-height: 1.4; color: var(--fb-text); text-decoration: none; margin-bottom: 6px; transition: var(--transition); }
.fb-post-title:hover { color: var(--fb-blue); }
.fb-post-text p { font-size: 0.94rem; line-height: 1.55; color: var(--fb-text-2); }

.fb-post-media { display: block; border-top: 1px solid var(--fb-border); border-bottom: 1px solid var(--fb-border); background: #000; overflow: hidden; }
.fb-post-media img { width: 100%; max-height: 460px; object-fit: cover; display: block; transition: var(--transition); }
.fb-post-media:hover img { opacity: 0.94; }

.fb-post-stats { display: flex; align-items: center; gap: 6px; padding: 12px 16px 8px; font-size: 0.84rem; color: var(--fb-text-2); }
.fb-react-icons { display: inline-flex; }
.fb-react-icons .fb-r { font-style: normal; font-size: 0.9rem; margin-right: -4px; filter: drop-shadow(0 0 1px rgba(0,0,0,0.4)); }
.fb-stats-count { margin-left: 6px; }
.fb-stats-right { margin-left: auto; }

.fb-post-actions { display: flex; border-top: 1px solid var(--fb-border); padding: 4px 8px; }
.fb-act { flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 9px 4px; font-family: 'Inter', sans-serif; font-size: 0.9rem; font-weight: 600; color: var(--fb-text-2); background: none; border: 0; border-radius: 8px; cursor: pointer; text-decoration: none; transition: var(--transition); }
.fb-act:hover { background: var(--fb-hover); }
.fb-act i { font-size: 1.02rem; }
.fb-act-like.liked { color: var(--fb-blue); }
.fb-act-read { color: var(--fb-blue); }

.blog-empty { text-align: center; padding: 60px 20px; color: var(--fb-text-2); }
.blog-empty i { font-size: 3rem; color: var(--fb-border); margin-bottom: 16px; }

/* Bài viết mới nhất (trang chủ) */
.latest-cta { text-align: center; margin-top: 32px; }

/* ============================================================
   TRANG BÀI VIẾT (post.html) - dạng post Facebook mở rộng
   ============================================================ */
.post-main { max-width: var(--fb-feed-w); margin: 0 auto; padding: 96px 16px 70px; }
.post-back { display: inline-flex; align-items: center; gap: 8px; color: var(--fb-text-2); text-decoration: none; font-size: 0.9rem; font-weight: 600; margin-bottom: 16px; transition: var(--transition); }
.post-back:hover { color: var(--fb-blue); }

.post-article { background: var(--fb-card); border: 1px solid var(--fb-border); border-radius: 12px; overflow: hidden; box-shadow: 0 1px 2px rgba(0,0,0,0.3); }

.post-fb-head { display: flex; align-items: center; gap: 10px; padding: 14px 16px 4px; }
.post-fb-head .fb-avatar { width: 44px; height: 44px; }
.post-fb-headinfo { display: flex; flex-direction: column; line-height: 1.35; }
.post-fb-headinfo .fb-author { font-size: 1rem; }
.post-fb-headinfo .fb-post-time { font-size: 0.8rem; }

.post-title { font-family: 'Space Grotesk', sans-serif; font-size: clamp(1.5rem, 4vw, 2rem); line-height: 1.25; color: var(--fb-text); letter-spacing: -0.4px; padding: 14px 16px 10px; }
.post-cover { border-top: 1px solid var(--fb-border); border-bottom: 1px solid var(--fb-border); background: #000; overflow: hidden; }
.post-cover img { width: 100%; max-height: 480px; object-fit: cover; display: block; }

.post-content { font-size: 1rem; line-height: 1.75; color: var(--fb-text); padding: 20px 18px 4px; }
.post-content p { margin-bottom: 18px; }
.post-content h2 { font-family: 'Space Grotesk', sans-serif; color: #fff; font-size: 1.35rem; margin: 28px 0 14px; }
.post-content ul, .post-content ol { margin: 0 0 18px 20px; }
.post-content li { margin-bottom: 9px; }
.post-content a { color: var(--fb-blue); }
.post-content blockquote { margin: 24px 0; padding: 16px 22px; border-left: 3px solid var(--fb-blue); background: rgba(45,136,255,0.08); border-radius: 0 10px 10px 0; color: #fff; font-style: italic; font-size: 1.05rem; }
.post-content img { display: block; width: 100%; margin: 18px 0; border-radius: 10px; }

.post-stats { display: flex; align-items: center; gap: 6px; margin: 8px 16px 0; padding: 12px 0 10px; border-top: 1px solid var(--fb-border); font-size: 0.86rem; color: var(--fb-text-2); }
.post-stats .fb-react-icons .fb-r { font-style: normal; font-size: 0.95rem; margin-right: -4px; }
.post-stats .fb-stats-right { margin-left: auto; }

.post-share { display: flex; align-items: center; gap: 6px; margin: 0 8px; padding: 4px 0; border-top: 1px solid var(--fb-border); }
.post-share .share-label { flex: none; padding-left: 8px; font-size: 0.85rem; color: var(--fb-text-2); font-weight: 600; }
.post-share a, .post-share button { flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 4px; font-family: 'Inter', sans-serif; font-size: 0.9rem; font-weight: 600; color: var(--fb-text-2); background: none; border: 0; border-radius: 8px; cursor: pointer; text-decoration: none; transition: var(--transition); }
.post-share a:hover, .post-share button:hover { background: var(--fb-hover); color: var(--fb-text); }

.post-related { max-width: var(--fb-feed-w); margin: 26px auto 0; }
.post-related .section-title { justify-content: flex-start; text-align: left; font-size: 1.2rem; margin: 0 4px 16px; color: var(--fb-text); }

.post-notfound { text-align: center; padding: 60px 20px; background: var(--fb-card); border: 1px solid var(--fb-border); border-radius: 12px; }
.post-notfound i { font-size: 3.4rem; color: var(--fb-blue); margin-bottom: 20px; }
.post-notfound h1 { font-family: 'Space Grotesk', sans-serif; color: #fff; font-size: 1.8rem; margin-bottom: 12px; }
.post-notfound p { margin-bottom: 28px; color: var(--fb-text-2); }

/* Responsive layout 3 cột */
@media (max-width: 1180px) {
    .fb-layout { grid-template-columns: 260px minmax(0, var(--fb-feed-w)); }
    .fb-side-right { display: none; }
}
@media (max-width: 920px) {
    .fb-layout { grid-template-columns: minmax(0, var(--fb-feed-w)); padding: 24px 16px 90px; }
    .fb-side-left { display: none; }
    .fb-cover-bar { flex-direction: column; align-items: center; text-align: center; margin-top: -60px; }
    .fb-cover-info h1 { justify-content: center; }
    .fb-cover-actions { padding-bottom: 0; }
}

@media (max-width: 640px) {
    .blog-main, .post-main { padding-left: 0; padding-right: 0; }
    .fb-layout { padding-left: 0; padding-right: 0; }
    .fb-cover { padding-left: 0; padding-right: 0; }
    .fb-cover-photo { height: 180px; border-radius: 0; }
    .fb-cover-avatar { width: 120px; height: 120px; }
    .fb-post, .post-article { border-radius: 0; border-left: 0; border-right: 0; }
    .fb-composer { border-radius: 0; border-left: 0; border-right: 0; }
    .blog-toolbar { padding: 0 12px; }
    .post-back { margin-left: 12px; }
    .post-related { padding: 0 0; }
    .post-related .section-title { margin-left: 14px; }
}