/* Custom Properties */
:root {
    --bg-dark: #050505;
    --bg-card: #111111;
    --bg-card-hover: #1a1a1a;
    --primary: #CCFF00;
    --primary-glow: rgba(204, 255, 0, 0.2);
    --secondary: #00FF85;
    --text-main: #FFFFFF;
    --text-muted: #A0A0A0;
    --border-color: #222222;
    
    --font-main: 'Inter', sans-serif;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: #333;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography Utilities */
.highlight { color: var(--primary); }
.text-center { text-align: center; }

h1, h2, h3 { line-height: 1.2; font-weight: 700; }
.section-title { font-size: 2.5rem; margin-bottom: 1rem; }
.section-subtitle { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 3rem; text-align: center; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    font-size: 1rem;
    border: none;
}

.btn-primary {
    background-color: var(--primary);
    color: #000;
    box-shadow: 0 0 20px var(--primary-glow);
}

.btn-primary:hover {
    background-color: #dfff4d;
    box-shadow: 0 0 30px rgba(204, 255, 0, 0.4);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-block { width: 100%; }

/* Layout Grid Utilities */
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }

/* Sections */
.section { padding: 100px 0; }
.dark-bg { background-color: rgba(204, 255, 0, 0.02); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }

/* Animation Hover (Yêu cầu của người dùng làm hình ảnh/nội dung nhấc lên 1 nhịp) */
.hover-lift {
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s ease;
    will-change: transform;
}
.hover-lift:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 30px 60px rgba(0,0,0, 0.6), 0 0 25px var(--primary-glow);
    border-color: var(--primary);
}

.hover-float {
    animation: float 6s ease-in-out infinite;
    transition: var(--transition);
}
.hover-float:hover {
    transform: scale(1.05) translateY(-5px);
    filter: drop-shadow(0 0 40px var(--primary-glow));
    animation-play-state: paused;
}

@keyframes float {
    0% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(1deg); }
    100% { transform: translateY(0px) rotate(0deg); }
}

/* Navbar */
.navbar {
    padding: 20px 0;
    position: fixed;
    top: 0; left: 0; right: 0;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(12px);
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}
.nav-content { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.5rem; font-weight: 800; cursor: pointer; }
.logo span { color: var(--primary); }

/* Hero */
.hero {
    padding: 180px 0 100px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}
.hero-grid {
    display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: center;
}
.hero-text h1 { font-size: 3.5rem; margin-bottom: 24px; }
.hero-text p { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 32px; max-width: 90%; }
.hero-cta { margin-bottom: 40px; }
.limited-offer { display: block; margin-top: 16px; font-size: 0.95rem; color: var(--primary); display: flex; align-items: center; gap: 8px;}

.trust-indicators { display: flex; gap: 32px; color: var(--text-muted); font-size: 1rem; }
.trust-item { display: flex; align-items: center; gap: 8px; }
.trust-item i { color: var(--primary); font-size: 1.4rem; }

.hero-image { position: relative; }
.glow-bg {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 350px; height: 350px;
    background: var(--primary);
    filter: blur(150px);
    border-radius: 50%;
    opacity: 0.25;
    z-index: -1;
}
.hero-image img { width: 100%; height: auto; max-width: 500px; border-radius: 20px; cursor: pointer;} /* Thêm cursor pointer cho hình ảnh hover */

/* Cards (Pain Points & Benefits) */
.card, .benefit-card, .solution-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 32px;
    border-radius: 16px;
    height: 100%;
    cursor: pointer;
}
.card-icon {
    width: 56px; height: 56px;
    background: rgba(204, 255, 0, 0.1);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 28px;
    color: var(--primary);
    margin-bottom: 24px;
    transition: var(--transition);
}
.card:hover .card-icon {
    background: var(--primary);
    color: #000;
    transform: scale(1.1) rotate(5deg);
}

.card h3, .benefit-card h3 { margin-bottom: 12px; font-size: 1.25rem; }
.card p, .benefit-card p { color: var(--text-muted); font-size: 0.95rem; }

.pb-icon { font-size: 48px; color: var(--primary); margin-bottom: 20px; display: inline-block; transition: var(--transition);}
.benefit-card:hover .pb-icon { transform: scale(1.1); color: #fff; text-shadow: 0 0 20px var(--primary);}

/* Solution Grid */
.solution-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.solution-image { position: relative; display: flex; justify-content: center;}
.glow-bg-secondary {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 250px; height: 250px; background: var(--secondary); filter: blur(120px); opacity: 0.2; z-index: -1;
}
.icon-large { font-size: 64px; color: var(--primary); margin-bottom: 20px;}
.feature-list { list-style: none; margin-top: 32px; display: grid; gap: 16px; }
.feature-list li { display: flex; align-items: flex-start; gap: 12px; font-size: 1.05rem; }
.feature-list i { font-size: 24px; margin-top: 2px; }

/* CTA Section & Form */
.cta-box {
    background: linear-gradient(145deg, var(--bg-card) 0%, #050505 100%);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 60px;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    position: relative;
    overflow: hidden;
}

.cta-box::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.cta-content h2 { font-size: 2.2rem; margin-bottom: 16px; }
.cta-content p { color: var(--text-muted); margin-bottom: 32px; font-size: 1.1rem;}

.price-box { margin-bottom: 40px; display: flex; align-items: center; gap: 16px; }
.old-price { font-size: 1.5rem; color: var(--text-muted); text-decoration: line-through; }
.new-price { font-size: 3rem; font-weight: 800; color: var(--primary); }

.countdown-container { margin-top: 24px; }
.countdown-label { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 12px; text-transform: uppercase; letter-spacing: 1px; }
.countdown { display: flex; align-items: center; gap: 12px; }
.time-box {
    background: #000;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    min-width: 80px;
    height: 80px;
    display: flex; flex-direction: column; justify-content: center; align-items: center;
    cursor: default;
}
.time-box span { font-size: 2rem; font-weight: 700; color: #fff; line-height: 1; margin-bottom: 4px; }
.time-box small { font-size: 0.8rem; color: var(--primary); text-transform: uppercase; }
.colon { font-size: 2rem; font-weight: 700; color: var(--text-muted); margin-bottom: 20px;}

.contact-form {
    background: #000;
    padding: 40px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}
.contact-form h3 { margin-bottom: 24px; font-size: 1.4rem; text-align: center; }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-size: 0.9rem; color: var(--text-muted); }
.input-with-icon { position: relative; }
.input-with-icon i {
    position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
    color: var(--text-muted); font-size: 20px;
}
.input-with-icon input {
    width: 100%;
    padding: 16px 16px 16px 46px;
    background: #0a0a0a;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: #fff;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}
.input-with-icon input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 10px rgba(204, 255, 0, 0.1); background: #111111; }
.form-note { margin-top: 16px; font-size: 0.85rem; color: var(--text-muted); display: flex; justify-content: center; gap: 6px; align-items: center;}

/* Footer */
.footer { padding: 40px 0; border-top: 1px solid var(--border-color); margin-top: 60px; }
.footer-content { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px;}
.footer-content p { color: var(--text-muted); font-size: 0.9rem;}
.footer-links a { color: var(--text-muted); text-decoration: none; margin-left: 20px; font-size: 0.9rem; transition: var(--transition);}
.footer-links a:hover { color: var(--primary); }

/* Toast */
.toast {
    position: fixed; bottom: -100px; left: 50%; transform: translateX(-50%);
    background: var(--bg-card); border: 1px solid var(--primary);
    padding: 16px 24px; border-radius: 50px;
    display: flex; align-items: center; gap: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5); z-index: 1000;
    transition: bottom 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}
.toast.show { bottom: 40px; }
.toast i { color: var(--primary); font-size: 24px; }

/* Scroll Animations */
.fade-up { opacity: 0; transform: translateY(40px); transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1); }
.reveal { opacity: 0; transform: scale(0.9) translateY(20px); transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1); }

.fade-up.active, .reveal.active { opacity: 1; transform: translateY(0) scale(1); }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* Responsive */
@media (max-width: 991px) {
    .hero-grid, .solution-grid, .cta-box { grid-template-columns: 1fr; text-align: center; }
    .hero-text h1 { font-size: 2.8rem; }
    .hero-text p { max-width: 100%; margin: 0 auto 32px;}
    .hero-cta { justify-content: center; }
    .trust-indicators { justify-content: center; }
    .solution-image { order: -1; }
    .feature-list li { text-align: left; }
    .cta-box { padding: 40px 24px; }
    .countdown { justify-content: center; }
}

@media (max-width: 576px) {
    .hero-text h1 { font-size: 2.2rem; }
    .section { padding: 60px 0; }
    .price-box { flex-direction: column; gap: 4px; justify-content: center;}
}