/* Style: index.styles03.css - Deep Red (Maroon) Luxury Theme */

:root {
    --bg-dark: #120303;
    --accent-red: #8b0000;
    --bright-red: #d42424;
    --gold-sub: #ceae7b;
    --glass: rgba(139, 0, 0, 0.07);
    --glass-border: rgba(212, 36, 36, 0.2);
}

* { box-sizing: border-box; transition: all 0.3s ease; }

body {
    margin: 0;
    font-family: 'Plus Jakarta Sans', sans-serif;
    background: var(--bg-dark);
    color: #f8f4f4;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Nền hiệu ứng khói đỏ huyền bí */
body::before {
    content: "";
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at 10% 20%, rgba(139, 0, 0, 0.15) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(18, 3, 3, 1) 0%, transparent 60%);
    z-index: -1;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Hero Section */
.hero {
    padding: 100px 0 60px;
    text-align: center;
}

.badge {
    background: rgba(139, 0, 0, 0.2);
    color: var(--bright-red);
    padding: 8px 20px;
    border-radius: 4px; /* Góc nhọn hơn tạo vẻ quyền lực */
    font-size: 0.8rem;
    font-weight: bold;
    border: 1px solid var(--accent-red);
    text-transform: uppercase;
    letter-spacing: 3px;
}

h1.main-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    margin: 20px 0;
    background: linear-gradient(to bottom, #fff 20%, var(--bright-red) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
    filter: drop-shadow(0 5px 15px rgba(0,0,0,0.5));
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin: 50px 0;
}

.feature-card {
    background: linear-gradient(145deg, rgba(30, 5, 5, 0.9), rgba(18, 3, 3, 0.9));
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 40px;
    text-decoration: none;
    color: inherit;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(10px);
}

.feature-card::after {
    content: "";
    position: absolute;
    bottom: 0; left: 0; width: 100%; height: 2px;
    background: var(--bright-red);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.5s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--bright-red);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.8);
}

.feature-card:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.icon-box {
    font-size: 3rem;
    margin-bottom: 20px;
    filter: grayscale(0.5) brightness(1.2);
}

.feature-card h3 {
    font-size: 1.8rem;
    margin: 10px 0;
    color: #fff;
    font-weight: 700;
}

.feature-card p.subtitle {
    font-weight: 600;
    margin-bottom: 15px;
    font-size: 1.1rem;
    color: var(--bright-red);
}

.feature-card p.description {
    color: #a59a9a;
    font-size: 0.95rem;
}

.btn-go {
    margin-top: auto;
    display: flex;
    align-items: center;
    color: var(--bright-red);
    font-weight: bold;
    font-size: 0.9rem;
    padding-top: 20px;
    text-transform: uppercase;
}

/* Stats Section */
.stats-bar {
    display: flex;
    justify-content: space-around;
    padding: 60px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: 50px;
    flex-wrap: wrap;
    gap: 30px;
}

.stat-item h2 { 
    font-size: 2.8rem; 
    margin: 0; 
    color: #fff;
    font-weight: 800;
}
.stat-item p { margin: 5px 0 0; color: var(--bright-red); text-transform: uppercase; font-size: 0.75rem; letter-spacing: 2px; }

/* Footer */
footer {
    padding: 80px 0 40px;
    text-align: center;
    background: linear-gradient(to top, rgba(139, 0, 0, 0.05), transparent);
}

.cta-btn {
    background: transparent;
    color: #fff;
    padding: 16px 50px;
    border: 1px solid var(--bright-red);
    border-radius: 4px;
    text-decoration: none;
    font-weight: 700;
    display: inline-block;
    margin-bottom: 40px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.cta-btn:hover {
    background: var(--bright-red);
    box-shadow: 0 0 30px rgba(212, 36, 36, 0.4);
}

@media (max-width: 768px) {
    .features-grid { grid-template-columns: 1fr; }
}