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

:root {
    --bg-body: #030014;         /* Nền đen tím than sâu */
    --primary: #7000ff;         /* Tím điện */
    --secondary: #00c3ff;       /* Xanh Cyan */
    --text-main: #ffffff;
    --text-sub: #cbd5e1;        /* Xám sáng - Thay cho text-muted mặc định */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-highlight: rgba(255, 255, 255, 0.1);
}

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

/* === QUAN TRỌNG: FIX LỖI KHÔNG THẤY TEXT === */
.text-muted {
    color: var(--text-sub) !important;
}
p, small, li {
    color: var(--text-sub);
}
h1, h2, h3, h4, h5, h6 {
    color: #fff;
}

/* --- BACKGROUND AURORA --- */
.aurora-bg {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1;
    background: radial-gradient(circle at 50% 0%, #1a103c 0%, var(--bg-body) 60%);
}
.blob {
    position: absolute; filter: blur(80px); opacity: 0.4; animation: floatBlob 10s infinite alternate;
}
.blob-1 { top: -10%; left: 20%; width: 500px; height: 500px; background: var(--primary); border-radius: 40% 60% 70% 30%; }
.blob-2 { bottom: 10%; right: 10%; width: 400px; height: 400px; background: var(--secondary); border-radius: 60% 40% 30% 70%; animation-delay: -5s; }

@keyframes floatBlob { from { transform: translate(0, 0) rotate(0deg); } to { transform: translate(30px, 50px) rotate(10deg); } }

/* --- COMPONENTS --- */
.navbar {
    padding: 20px 0; background: rgba(3, 0, 20, 0.7); backdrop-filter: blur(15px); border-bottom: 1px solid var(--glass-border); transition: 0.3s;
}
.navbar-brand { font-weight: 800; font-size: 1.5rem; letter-spacing: -0.5px; color: white !important; }
.nav-link { color: var(--text-sub) !important; font-weight: 500; transition: 0.3s; margin: 0 10px; }
.nav-link:hover { color: white !important; text-shadow: 0 0 10px rgba(255,255,255,0.5); }

.btn-glow {
    background: linear-gradient(90deg, var(--primary), #a855f7); color: white !important; padding: 12px 30px; border-radius: 50px; font-weight: 600; text-decoration: none; border: none; position: relative; z-index: 1; overflow: hidden; transition: 0.3s; display: inline-block;
}
.btn-glow::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(90deg, #a855f7, var(--primary)); z-index: -1; transition: opacity 0.3s; opacity: 0;
}
.btn-glow:hover::before { opacity: 1; }
.btn-glow:hover { box-shadow: 0 0 30px rgba(112, 0, 255, 0.4); transform: translateY(-2px); }

/* --- HERO CENTERED --- */
.hero { padding: 160px 0 100px; text-align: center; }
.hero-tag {
    background: var(--glass-bg); border: 1px solid var(--glass-border); padding: 8px 20px; border-radius: 30px; display: inline-flex; align-items: center; margin-bottom: 30px; font-size: 0.9rem; color: var(--secondary); font-weight: 600;
}
.hero h1 {
    font-size: 4.5rem; font-weight: 800; line-height: 1.1; margin-bottom: 25px; background: linear-gradient(180deg, #fff 0%, #94a3b8 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-desc { font-size: 1.25rem; color: var(--text-sub) !important; max-width: 700px; margin: 0 auto 40px; }

/* Image Container */
.hero-img-box {
    margin-top: 60px; position: relative; padding: 10px; background: linear-gradient(180deg, rgba(255,255,255,0.1), rgba(255,255,255,0)); border-radius: 20px;
}
.hero-img { border-radius: 15px; box-shadow: 0 20px 80px rgba(0,0,0,0.6); display: block; width: 100%; }

/* --- BENTO GRID FEATURES --- */
.bento-card {
    background: var(--glass-bg); border: 1px solid var(--glass-border); padding: 30px; border-radius: 24px; height: 100%; transition: 0.4s; position: relative; overflow: hidden;
}
.bento-card:hover { background: var(--glass-highlight); border-color: rgba(255,255,255,0.2); transform: translateY(-5px); }
.bento-icon {
    width: 60px; height: 60px; border-radius: 16px; background: rgba(255,255,255,0.05); display: flex; align-items: center; justify-content: center; font-size: 1.8rem; margin-bottom: 20px; color: var(--secondary);
}
.bento-card h4 { font-weight: 700; margin-bottom: 15px; color: #fff; }

/* --- COMPARISON GLASS --- */
.compare-wrap {
    background: linear-gradient(90deg, rgba(255,50,50,0.05) 0%, rgba(50,255,100,0.05) 100%);
    border: 1px solid var(--glass-border); border-radius: 30px; overflow: hidden;
}
.compare-col { padding: 50px; }
.compare-col.bad { border-right: 1px solid var(--glass-border); }
.check-list li { margin-bottom: 15px; display: flex; align-items: flex-start; color: var(--text-sub); }
.check-list i { margin-right: 12px; margin-top: 5px; font-size: 1.1rem; }

/* --- PRICING GLOW --- */
.price-card {
    background: var(--bg-body); border: 1px solid var(--glass-border); border-radius: 24px; padding: 40px 30px; position: relative; transition: 0.3s; height: 100%; display: flex; flex-direction: column;
}
.price-card:hover { border-color: var(--primary); box-shadow: 0 10px 40px rgba(112, 0, 255, 0.15); }
.price-card.popular { background: linear-gradient(145deg, rgba(112,0,255,0.05), rgba(0,0,0,0)); border: 1px solid var(--primary); transform: scale(1.05); z-index: 2; }

.price-tag { font-size: 3rem; font-weight: 800; color: white; letter-spacing: -1px; }
.price-sub { color: var(--text-sub); }
.btn-price {
    width: 100%; padding: 15px; border-radius: 12px; font-weight: 700; text-align: center; text-decoration: none; margin-top: auto; transition: 0.3s; background: rgba(255,255,255,0.05); color: white !important;
}
.btn-price:hover { background: white; color: black !important; }
.price-card.popular .btn-price { background: var(--primary); border: none; }
.price-card.popular .btn-price:hover { background: #8b2df7; }

/* --- FAQ & FOOTER --- */
.accordion-item { border: 1px solid var(--glass-border); background: var(--glass-bg); border-radius: 12px !important; margin-bottom: 15px; overflow: hidden; }
.accordion-button { background: transparent; color: white !important; font-weight: 600; box-shadow: none !important; }
.accordion-button:not(.collapsed) { background: rgba(112, 0, 255, 0.1); color: var(--secondary) !important; }
.accordion-body { color: var(--text-sub); }

footer { border-top: 1px solid var(--glass-border); padding: 80px 0 30px; background: #010008; }
.social-link { width: 40px; height: 40px; border-radius: 50%; background: var(--glass-bg); display: inline-flex; align-items: center; justify-content: center; color: white; margin-right: 10px; transition: 0.3s; text-decoration: none; }
.social-link:hover { background: var(--primary); }

/* Mobile Fix */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .hero { padding-top: 120px; }
    .compare-col.bad { border-right: none; border-bottom: 1px solid var(--glass-border); }
    .price-card.popular { transform: scale(1); }
}

/* =========================================
   TYPOGRAPHY H1, H2, H3 PRESETS
   ========================================= */

/* --- 1. GLOBAL SETTINGS --- */
h1, h2, h3, h4, h5, h6 {
    color: #ffffff;
    font-weight: 800; /* Chữ dày tạo cảm giác mạnh mẽ */
    letter-spacing: -0.03em; /* Thu hẹp khoảng cách chữ để hiện đại hơn */
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

/* --- 2. H1: HERO TITLE (Điểm nhấn chính) --- */
/* Hiệu ứng: Chữ chuyển màu từ Trắng sang Xanh Neon sang Tím */
h1 {
    font-size: 4rem; /* Kích thước lớn */
    background: linear-gradient(
        135deg, 
        #ffffff 0%, 
        #a5f3fc 40%, /* Xanh nhạt */
        #a855f7 80%  /* Tím */
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    
    /* Tạo bóng phát sáng nhẹ phía sau */
    filter: drop-shadow(0 0 25px rgba(168, 85, 247, 0.4));
    
    position: relative;
    z-index: 2;
}

/* --- 3. H2: SECTION TITLE (Tiêu đề các phần) --- */
/* Hiệu ứng: Chữ trắng sáng, bóng mờ bên dưới */
h2 {
    font-size: 2.8rem;
    color: #f8fafc;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    margin-bottom: 1rem;
}

/* Class bổ sung cho H2 để tạo điểm nhấn (dùng trong HTML: <h2 class="h2-glow">) */
.h2-glow {
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* --- 4. H3: CARD TITLE (Tiêu đề trong các ô Bento/Pricing) --- */
h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: #ffffff;
}

/* Trong Card Bento: Thêm gạch màu nhỏ bên cạnh */
.bento-card h3, 
.feature-title {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
}

/* --- 5. TEXT HIGHLIGHT (Dùng thẻ span) --- */
/* Dùng cho các từ khóa muốn nhấn mạnh. VD: <span>Tuyệt đối</span> */
.text-highlight {
    color: var(--secondary);
    text-shadow: 0 0 15px rgba(0, 195, 255, 0.5);
    font-style: italic;
}

/* --- RESPONSIVE MOBILE --- */
@media (max-width: 768px) {
    h1 { font-size: 2.8rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
}