@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

*{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#4a9eff;--primary-light:#7bb8ff;--primary-dark:#2d7ad4;
  --bg-dark:#0a0e27;--bg-card:rgba(255,255,255,0.05);
  --text:#e8eaf6;--text-muted:#8892b0;
  --glass:rgba(255,255,255,0.08);--glass-border:rgba(255,255,255,0.12);
  --gradient:linear-gradient(135deg,#4a9eff,#7b68ee,#00bcd4);
}
html{scroll-behavior:smooth}
body{font-family:'Inter',sans-serif;background:var(--bg-dark);color:var(--text);overflow-x:hidden;line-height:1.6}

/* STARS - Di chuyển đung đưa giống Zig */
.stars,.stars2,.stars3{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:0}
.stars{
  background:
    radial-gradient(2px 2px at 20px 30px,rgba(255,255,255,.4),transparent),
    radial-gradient(2px 2px at 60px 70px,rgba(255,255,255,.3),transparent),
    radial-gradient(1px 1px at 50px 50px,rgba(255,255,255,.5),transparent),
    radial-gradient(1px 1px at 80px 10px,rgba(255,255,255,.4),transparent),
    radial-gradient(2px 2px at 90px 40px,rgba(255,255,255,.3),transparent),
    radial-gradient(1px 1px at 33px 90px,rgba(255,255,255,.4),transparent),
    radial-gradient(2px 2px at 40px 60px,rgba(255,255,255,.5),transparent);
  background-size:200px 200px;
  background-position:0 0,40px 60px,130px 270px,70px 100px,20px 180px,150px 50px,100px 200px;
  animation:moveParticles 20s linear infinite;
}
.stars2{
  background:
    radial-gradient(1px 1px at 50px 50px,rgba(74,158,255,.5),transparent),
    radial-gradient(1px 1px at 150px 150px,rgba(123,104,238,.4),transparent),
    radial-gradient(2px 2px at 250px 30px,rgba(0,188,212,.4),transparent),
    radial-gradient(1px 1px at 350px 180px,rgba(74,158,255,.3),transparent),
    radial-gradient(1px 1px at 450px 90px,rgba(123,104,238,.3),transparent);
  background-size:500px 250px;
  background-position:0 0,100px 80px,250px 150px,400px 50px,150px 200px;
  animation:moveParticles2 30s linear infinite;
}
.stars3{
  background:
    radial-gradient(1px 1px at 80px 120px,rgba(255,255,255,.35),transparent),
    radial-gradient(1px 1px at 180px 60px,rgba(74,158,255,.25),transparent),
    radial-gradient(1px 1px at 280px 160px,rgba(255,255,255,.3),transparent),
    radial-gradient(2px 2px at 120px 80px,rgba(123,104,238,.2),transparent);
  background-size:400px 200px;
  background-position:0 0,80px 100px,200px 50px,300px 150px;
  animation:moveParticles3 25s linear infinite;
}
@keyframes moveParticles{
  0%{background-position:0 0,40px 60px,130px 270px,70px 100px,20px 180px,150px 50px,100px 200px}
  50%{background-position:100px 100px,140px 160px,230px 370px,170px 200px,120px 280px,250px 150px,200px 300px}
  100%{background-position:0 0,40px 60px,130px 270px,70px 100px,20px 180px,150px 50px,100px 200px}
}
@keyframes moveParticles2{
  0%{background-position:0 0,100px 80px,250px 150px,400px 50px,150px 200px}
  50%{background-position:80px 120px,180px 200px,330px 50px,300px 170px,250px 80px}
  100%{background-position:0 0,100px 80px,250px 150px,400px 50px,150px 200px}
}
@keyframes moveParticles3{
  0%{background-position:0 0,80px 100px,200px 50px,300px 150px}
  50%{background-position:60px 80px,140px 30px,260px 130px,360px 70px}
  100%{background-position:0 0,80px 100px,200px 50px,300px 150px}
}


/* GALAXY ORB */
.galaxy-orb{position:fixed;border-radius:50%;filter:blur(80px);pointer-events:none;z-index:0}
.galaxy-orb.o1{width:500px;height:500px;background:radial-gradient(circle,rgba(74,158,255,.15),transparent);top:-100px;right:-100px;animation:float1 20s ease-in-out infinite}
.galaxy-orb.o2{width:400px;height:400px;background:radial-gradient(circle,rgba(123,104,238,.12),transparent);bottom:-50px;left:-50px;animation:float2 25s ease-in-out infinite}
.galaxy-orb.o3{width:300px;height:300px;background:radial-gradient(circle,rgba(0,188,212,.1),transparent);top:50%;left:50%;animation:float3 18s ease-in-out infinite}
@keyframes float1{0%,100%{transform:translate(0,0)}50%{transform:translate(-60px,40px)}}
@keyframes float2{0%,100%{transform:translate(0,0)}50%{transform:translate(50px,-50px)}}
@keyframes float3{0%,100%{transform:translate(-50%,-50%)}50%{transform:translate(-40%,-60%)}}

/* NAVBAR */
.navbar{position:fixed;top:0;width:100%;z-index:1000;padding:16px 0;transition:all .3s}
.navbar.scrolled{background:rgba(10,14,39,.95);backdrop-filter:blur(20px);border-bottom:1px solid var(--glass-border);padding:10px 0}
.nav-container{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;font-size:1.5rem;color:#fff}
.nav-logo img{height:36px}
.nav-logo span{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.nav-links{display:flex;align-items:center;gap:32px;list-style:none}
.nav-links a{color:var(--text-muted);text-decoration:none;font-weight:500;font-size:.95rem;transition:color .3s;position:relative}
.nav-links a:hover,.nav-links a.active{color:#fff}
.nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--gradient);transition:width .3s}
.nav-links a:hover::after{width:100%}
.nav-auth{display:flex;align-items:center;gap:12px}
.btn-login{background:transparent;border:1px solid var(--glass-border);color:#fff;padding:8px 20px;border-radius:8px;font-size:.9rem;cursor:pointer;transition:all .3s;font-family:'Inter',sans-serif}
.btn-login:hover{border-color:var(--primary);color:var(--primary)}
.btn-register{background:var(--gradient);border:none;color:#fff;padding:9px 22px;border-radius:8px;font-size:.9rem;cursor:pointer;font-weight:600;transition:all .3s;font-family:'Inter',sans-serif}
.btn-register:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(74,158,255,.3)}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:5px;background:none;border:none;z-index:1001}
.hamburger span{width:24px;height:2px;background:#fff;border-radius:2px;transition:all .3s}
.hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* MOBILE MENU */
.mobile-menu{display:none;position:fixed;top:0;right:-100%;width:280px;height:100vh;background:rgba(10,14,39,.98);backdrop-filter:blur(30px);padding:80px 30px 30px;transition:right .4s cubic-bezier(.4,0,.2,1);z-index:999;border-left:1px solid var(--glass-border)}
.mobile-menu.open{right:0}
.mobile-menu-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.5);z-index:998;opacity:0;transition:opacity .3s}
.mobile-menu-overlay.show{opacity:1}
.mobile-menu ul{list-style:none;display:flex;flex-direction:column;gap:8px}
.mobile-menu ul a{color:var(--text-muted);text-decoration:none;font-size:1.05rem;font-weight:500;padding:12px 16px;display:block;border-radius:8px;transition:all .3s}
.mobile-menu ul a:hover{color:#fff;background:var(--glass)}
.mobile-menu .mobile-auth{margin-top:24px;padding-top:24px;border-top:1px solid var(--glass-border);display:flex;flex-direction:column;gap:10px}
.mobile-menu .mobile-auth .btn-login,.mobile-menu .mobile-auth .btn-register{width:100%;text-align:center;padding:12px}

/* HERO */
.hero{min-height:100vh;display:flex;align-items:center;position:relative;padding:120px 0 80px}
.hero-container{max-width:1200px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;position:relative;z-index:1}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:var(--glass);border:1px solid var(--glass-border);padding:6px 16px;border-radius:50px;font-size:.85rem;color:var(--primary-light);margin-bottom:20px}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--primary);animation:pulse-dot 2s infinite}
@keyframes pulse-dot{0%,100%{opacity:1}50%{opacity:.3}}
.hero h1{font-size:3.2rem;font-weight:800;line-height:1.15;margin-bottom:20px}
.hero h1 .highlight{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero p{font-size:1.1rem;color:var(--text-muted);margin-bottom:32px;max-width:480px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn-primary{background:var(--gradient);border:none;color:#fff;padding:14px 32px;border-radius:12px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s;text-decoration:none;display:inline-flex;align-items:center;gap:8px;font-family:'Inter',sans-serif}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 35px rgba(74,158,255,.35)}
.btn-outline{background:transparent;border:1px solid var(--glass-border);color:#fff;padding:14px 32px;border-radius:12px;font-size:1rem;font-weight:500;cursor:pointer;transition:all .3s;text-decoration:none;display:inline-flex;align-items:center;gap:8px;font-family:'Inter',sans-serif}
.btn-outline:hover{border-color:var(--primary);background:rgba(74,158,255,.08)}
.hero-visual{position:relative;display:flex;justify-content:center}
.hero-card{background:rgba(15,20,50,.8);border:1px solid var(--glass-border);border-radius:20px;padding:30px;backdrop-filter:blur(20px);width:100%;max-width:440px;animation:heroFloat 6s ease-in-out infinite}
@keyframes heroFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-15px)}}
.hero-card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;padding-bottom:16px;border-bottom:1px solid var(--glass-border)}
.hero-card-header h3{font-size:1rem;font-weight:600}
.status-badge{background:rgba(0,200,83,.15);color:#00c853;padding:4px 12px;border-radius:20px;font-size:.78rem;font-weight:600}
.proxy-list{display:flex;flex-direction:column;gap:10px}
.proxy-item{display:flex;align-items:center;justify-content:space-between;background:var(--glass);padding:12px 16px;border-radius:10px;border:1px solid var(--glass-border);transition:all .3s}
.proxy-item:hover{border-color:var(--primary);transform:translateX(4px)}
.proxy-item .ip{font-family:monospace;font-size:.9rem;color:var(--primary-light)}
.proxy-item .location{font-size:.82rem;color:var(--text-muted)}
.proxy-item .speed{font-size:.82rem;color:#00c853;font-weight:600}
.hero-glow{position:absolute;width:350px;height:350px;background:radial-gradient(circle,rgba(74,158,255,.2),transparent);border-radius:50%;filter:blur(60px);top:50%;left:50%;transform:translate(-50%,-50%);z-index:-1}

/* SECTION COMMON */
.section{padding:100px 0;position:relative;z-index:1}
.section-container{max-width:1200px;margin:0 auto;padding:0 24px}
.section-header{text-align:center;margin-bottom:60px}
.section-header h2{font-size:2.4rem;font-weight:800;margin-bottom:16px}
.section-header h2 .highlight{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.section-header p{color:var(--text-muted);font-size:1.05rem;max-width:600px;margin:0 auto}

/* FEATURES */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:var(--bg-card);border:1px solid var(--glass-border);border-radius:16px;padding:32px;transition:all .4s;position:relative;overflow:hidden}
.feature-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient);opacity:0;transition:opacity .3s}
.feature-card:hover{transform:translateY(-8px);border-color:var(--primary);box-shadow:0 20px 60px rgba(74,158,255,.1)}
.feature-card:hover::before{opacity:1}
.feature-icon{width:56px;height:56px;border-radius:14px;background:rgba(74,158,255,.1);display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:20px}
.feature-card h3{font-size:1.15rem;font-weight:700;margin-bottom:10px}
.feature-card p{color:var(--text-muted);font-size:.92rem;line-height:1.7}

/* PRICING */
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.price-card{background:var(--bg-card);border:1px solid var(--glass-border);border-radius:20px;padding:36px;text-align:center;transition:all .4s;position:relative}
.price-card.popular{border-color:var(--primary);background:rgba(74,158,255,.05)}
.price-card.popular::before{content:'PHỔ BIẾN';position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--gradient);color:#fff;padding:4px 20px;border-radius:20px;font-size:.75rem;font-weight:700;letter-spacing:.5px}
.price-card:hover{transform:translateY(-8px);box-shadow:0 20px 60px rgba(74,158,255,.12)}
.price-card h3{font-size:1.2rem;font-weight:700;margin-bottom:8px}
.price-card .price{font-size:2.8rem;font-weight:800;margin:16px 0 8px}
.price-card .price span{font-size:.95rem;font-weight:400;color:var(--text-muted)}
.price-card .period{color:var(--text-muted);font-size:.85rem;margin-bottom:24px}
.price-card ul{list-style:none;text-align:left;margin-bottom:28px;display:flex;flex-direction:column;gap:12px}
.price-card ul li{display:flex;align-items:center;gap:10px;font-size:.92rem;color:var(--text-muted)}
.price-card ul li .check{color:var(--primary);font-weight:bold}
.price-card .btn-price{width:100%;padding:13px;border-radius:12px;font-size:.95rem;font-weight:600;cursor:pointer;transition:all .3s;border:none;font-family:'Inter',sans-serif}
.price-card .btn-price.primary{background:var(--gradient);color:#fff}
.price-card .btn-price.primary:hover{box-shadow:0 8px 25px rgba(74,158,255,.3);transform:translateY(-2px)}
.price-card .btn-price.outline{background:transparent;border:1px solid var(--glass-border);color:#fff}
.price-card .btn-price.outline:hover{border-color:var(--primary)}

/* STATS */
.stats-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:80px}
.stat-item{text-align:center;padding:24px}
.stat-item .num{font-size:2.2rem;font-weight:800;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.stat-item .label{color:var(--text-muted);font-size:.9rem;margin-top:4px}

/* FOOTER */
.footer{border-top:1px solid var(--glass-border);padding:60px 0 30px;position:relative;z-index:1}
.footer-grid{max-width:1200px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{color:var(--text-muted);font-size:.9rem;margin-top:12px;line-height:1.7}
.footer-col h4{font-size:.95rem;font-weight:700;margin-bottom:16px;color:#fff}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-col ul a{color:var(--text-muted);text-decoration:none;font-size:.9rem;transition:color .3s}
.footer-col ul a:hover{color:var(--primary-light)}
.footer-bottom{max-width:1200px;margin:40px auto 0;padding:20px 24px 0;border-top:1px solid var(--glass-border);display:flex;justify-content:space-between;align-items:center;font-size:.85rem;color:var(--text-muted)}

/* RESPONSIVE */
@media(max-width:1024px){
  .hero-container{grid-template-columns:1fr;text-align:center}
  .hero p{margin:0 auto 32px}
  .hero-btns{justify-content:center}
  .hero-visual{margin-top:40px}
  .features-grid,.pricing-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .stats-bar{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .nav-links,.nav-auth{display:none!important}
  .hamburger{display:flex}
  .mobile-menu{display:block}
  .mobile-menu-overlay{display:block}
  .hero h1{font-size:2.2rem}
  .features-grid,.pricing-grid{grid-template-columns:1fr}
  .section-header h2{font-size:1.8rem}
  .stats-bar{grid-template-columns:repeat(2,1fr);gap:16px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:10px;text-align:center}
}
@media(max-width:480px){
  .hero{padding:100px 0 60px}
  .hero h1{font-size:1.8rem}
  .hero-card{padding:20px}
  .section{padding:60px 0}
}