/* CSS Reset & Variables */
:root {
    --bg-dark: #0f1115;
    --bg-darker: #08090b;
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --accent-red: #c1121f;
    --accent-red-hover: #780000;
    --accent-gold: #d4af37;
    --accent-gold-light: #f3e5ab;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

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

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.highlight {
    color: var(--accent-gold);
}

.gold-text {
    color: var(--accent-gold);
}

/* Utility Classes */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 40px;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-gold);
}

.border-gold {
    border-top: 4px solid var(--accent-gold);
}

.section {
    padding: 80px 0;
}

.dark-section {
    background-color: var(--bg-darker);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--accent-gold);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: url('assets/images/hero_bg.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    text-align: center;
}

.hero .overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(15,17,21,0.7), rgba(15,17,21,1));
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.pre-title {
    font-size: 1rem;
    letter-spacing: 2px;
    color: var(--accent-red);
    text-transform: uppercase;
    margin-bottom: 20px;
}

.main-title {
    font-size: 4rem;
    margin-bottom: 30px;
}

.hero .subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

/* Buttons */
.cta-btn {
    display: inline-block;
    padding: 18px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    text-transform: uppercase;
    transition: all 0.3s ease;
    cursor: pointer;
}

.primary-btn {
    background: linear-gradient(135deg, var(--accent-red), var(--accent-red-hover));
    color: white;
    box-shadow: 0 4px 15px rgba(193, 18, 31, 0.4);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(193, 18, 31, 0.6);
}

.pulse-btn {
    background: linear-gradient(135deg, var(--accent-gold), #b8860b);
    color: var(--bg-darker);
    animation: pulse 2s infinite;
    display: block;
    text-align: center;
    margin-top: 30px;
}

@keyframes pulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.7); }
    70% { transform: scale(1.05); box-shadow: 0 0 0 15px rgba(212, 175, 55, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(212, 175, 55, 0); }
}

/* Specific Sections */
#pain-point p {
    font-size: 1.1rem;
    margin-bottom: 15px;
}

.warning {
    color: var(--accent-red);
    font-weight: bold;
    font-size: 1.2rem !important;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.feature-box {
    text-align: center;
}

.feature-box .icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.impact {
    font-size: 1.2rem;
    font-style: italic;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--glass-border);
}

/* Value Stack */
.bonus-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.bonus-list li {
    display: flex;
    align-items: center;
    padding: 20px 30px;
}

.bonus-tag {
    background: var(--accent-red);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 0.9rem;
    margin-right: 30px;
}

.bonus-content h4 {
    margin-bottom: 5px;
    font-size: 1.2rem;
}

.bonus-content p {
    color: var(--text-muted);
    margin-bottom: 0;
}

.bonus-list .value {
    margin-left: auto;
    font-weight: bold;
    color: var(--accent-gold);
    white-space: nowrap;
}

/* Pricing */
.pricing-card {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    border: 1px solid var(--accent-gold);
    box-shadow: 0 0 40px rgba(212, 175, 55, 0.1);
}

.price-header {
    margin-bottom: 40px;
}

.strike-through {
    text-decoration: line-through;
    color: var(--text-muted);
    font-size: 1.2rem;
}

.final-price {
    font-size: 3.5rem;
    color: var(--accent-gold);
    margin: 10px 0;
}

.limit {
    color: var(--accent-red);
    font-weight: bold;
    text-transform: uppercase;
}

.guarantee-box {
    background: rgba(0,0,0,0.3);
    padding: 30px;
    border-radius: 12px;
    text-align: left;
    border-left: 4px solid var(--accent-red);
}

.guarantee-box ul {
    list-style-position: inside;
    margin-top: 15px;
}

.guarantee-box li {
    margin-bottom: 10px;
    color: var(--text-muted);
}

.guarantee-box li strong {
    color: var(--text-main);
}

/* Footer & Floating */
footer {
    text-align: center;
    padding: 30px 0;
    color: var(--text-muted);
    border-top: 1px solid var(--glass-border);
}

.floating-zalo {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: #0068FF; /* Zalo Brand Color */
    color: white;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(0, 104, 255, 0.4);
    z-index: 1000;
    transition: transform 0.3s ease;
}

.floating-zalo:hover {
    transform: scale(1.05);
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .main-title { font-size: 2.5rem; }
    .grid-2 { grid-template-columns: 1fr; }
    .bonus-list li {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    .bonus-tag { margin-right: 0; }
    .bonus-list .value { margin-left: 0; }
    .final-price { font-size: 2.5rem; }
}