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

body {
    font-family: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
    background: radial-gradient(circle at 20% 30%, #0a0f1f, #020617);
    color: #eef2ff;
    line-height: 1.5;
    transition: background 0.5s ease;
    min-height: 100vh;
}

/* 13 цветов фона для динамической смены */
body.bg-dark { background: radial-gradient(circle at 20% 30%, #0a0f1f, #020617); }
body.bg-purple { background: radial-gradient(circle at 70% 80%, #1e1b4b, #020617); }
body.bg-cyan { background: radial-gradient(circle at 60% 20%, #0f172a, #042f2e); }
body.bg-red { background: radial-gradient(circle at 40% 60%, #2e0f1a, #1a050a); }
body.bg-blue { background: radial-gradient(circle at 80% 30%, #0b2b3b, #03101a); }
body.bg-gray { background: radial-gradient(circle at 50% 50%, #1a1e2a, #0a0c12); }
body.bg-orange { background: radial-gradient(circle at 30% 70%, #2e1a0f, #1a0a05); }
body.bg-teal { background: radial-gradient(circle at 90% 10%, #0f2e2a, #031a16); }
body.bg-pink { background: radial-gradient(circle at 25% 75%, #2e0f2a, #1a0515); }
body.bg-lime { background: radial-gradient(circle at 65% 45%, #1f2e0f, #0f1a05); }
body.bg-gold { background: radial-gradient(circle at 85% 55%, #2e2a0f, #1a1505); }
body.bg-indigo { background: radial-gradient(circle at 10% 90%, #1f0f2e, #0a0515); }
body.bg-brown { background: radial-gradient(circle at 75% 25%, #2e1f0f, #1a0f05); }

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 24px;
}

.glass-card {
    background: rgba(15, 25, 45, 0.6);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(108, 99, 255, 0.3);
    border-radius: 32px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.glass-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 35px -12px rgba(108,99,255,0.3);
    border-color: #6c63ff;
}

.btn {
    display: inline-block;
    background: linear-gradient(95deg, #6c63ff, #a855f7);
    color: white;
    padding: 14px 36px;
    border-radius: 60px;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.2s;
    box-shadow: 0 8px 20px rgba(108,99,255,0.4);
    border: none;
    cursor: pointer;
}
.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(108,99,255,0.6);
}
.btn-outline {
    background: transparent;
    border: 1px solid #6c63ff;
    box-shadow: none;
}
.btn-glow {
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(108,99,255,0.7); }
    70% { box-shadow: 0 0 0 15px rgba(108,99,255,0); }
    100% { box-shadow: 0 0 0 0 rgba(108,99,255,0); }
}

h1, h2, h3 {
    font-weight: 800;
    letter-spacing: -0.02em;
}
h1 {
    font-size: 3.5rem;
    background: linear-gradient(135deg, #fff, #c4b5fd);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
h2 {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    border-left: 5px solid #6c63ff;
    padding-left: 20px;
}
h3 {
    font-size: 1.5rem;
    margin: 1rem 0;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.sponsor-tier {
    background: linear-gradient(135deg, #1e293b, #0f172a);
    border-radius: 28px;
    padding: 28px;
    text-align: center;
}
.price {
    font-size: 2rem;
    font-weight: 800;
    color: #fbbf24;
}

footer {
    text-align: center;
    padding: 40px 20px;
    border-top: 1px solid rgba(255,255,255,0.05);
    margin-top: 60px;
}

@media (max-width: 768px) {
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.6rem; }
    .container { padding: 0 16px; }
    .btn { padding: 10px 24px; }
}
/* Супер-заметная кнопка для главного действия */
.btn-glow {
    background: linear-gradient(145deg, #6c63ff, #ff8c42) !important; /* Яркий двойной градиент */
    color: white !important;
    font-size: 1.4rem !important; /* Делаем текст крупнее */
    padding: 18px 45px !important; /* Увеличиваем размеры */
    border-radius: 60px !important;
    box-shadow: 0 0 25px rgba(108, 99, 255, 0.7) !important; /* Добавляем свечение */
    border: 2px solid rgba(255, 255, 255, 0.3) !important;
    transition: transform 0.2s, box-shadow 0.2s;
    letter-spacing: 1px;
}

.btn-glow:hover {
    transform: scale(1.05); /* Эффект увеличения при наведении */
    box-shadow: 0 0 35px rgba(255, 140, 66, 0.8) !important;
    border-color: white !important;
}