* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #0b0b0f;
    color: #ffffff;
    line-height: 1.6;
}

a {
    text-decoration: none;
}

header {
    background: #111118;
    padding: 18px 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
    color: white;
}

.logo img {
    height: 42px;
    width: auto;
}

.logo h2 {
    margin: 0;
    font-size: 24px;
    font-weight: 700;
}

nav {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}

nav a {
    color: white;
    font-weight: bold;
    opacity: 0.9;
}

nav a:hover {
    color: #ff4d4d;
}

.hero {
    padding: 110px 20px;
    text-align: center;
    background: linear-gradient(135deg, #c40000 0%, #7a0000 50%, #1a1a1a 100%);
}

.hero h1 {
    font-size: 54px;
    margin: 0 0 20px;
    line-height: 1.1;
}

.hero p {
    font-size: 20px;
    max-width: 850px;
    margin: 0 auto 30px;
}

.section {
    padding: 70px 20px;
    max-width: 1100px;
    margin: auto;
}

.section-title {
    font-size: 38px;
    margin-bottom: 12px;
    text-align: center;
}

.section-subtitle {
    text-align: center;
    color: #cfcfcf;
    max-width: 850px;
    margin: 0 auto 40px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.card {
    background: #17171f;
    padding: 28px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
}

.card h3,
.card h2 {
    margin-top: 0;
}

.app {
    background: #15151d;
    padding: 28px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    margin-bottom: 24px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
}

.button {
    display: inline-block;
    background: #c40000;
    padding: 12px 20px;
    border-radius: 8px;
    color: white;
    font-weight: bold;
    margin-right: 10px;
    transition: 0.2s ease;
}

.button:hover {
    background: #ff1f1f;
    transform: translateY(-1px);
}

.button.secondary {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.button.secondary:hover {
    background: rgba(255, 255, 255, 0.08);
}

.highlight {
    background: #111118;
    border-left: 4px solid #c40000;
    padding: 18px 20px;
    border-radius: 10px;
    margin: 20px 0;
}

ul {
    padding-left: 22px;
}

footer {
    background: #111118;
    padding: 32px 20px;
    text-align: center;
    margin-top: 60px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

footer a {
    color: white;
    margin: 0 8px;
}

footer a:hover {
    color: #ff4d4d;
}

.muted {
    color: #c9c9c9;
}

@media (max-width:800px) {
    header {
        padding: 18px 20px;
        flex-direction: column;
        gap: 14px;
    }

    nav {
        justify-content: center;
    }

    .hero h1 {
        font-size: 40px;
    }

    .hero p {
        font-size: 18px;
    }
}