* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Segoe UI", Arial, sans-serif;
}

body {
    height: 100vh;
    overflow: hidden;
    background: #0b0f1a;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
}

.background {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top, #1e3c72, #0b0f1a 60%);
    animation: bgMove 10s infinite alternate;
    z-index: -1;
}

@keyframes bgMove {
    from { filter: hue-rotate(0deg); }
    to { filter: hue-rotate(25deg); }
}

.container {
    text-align: center;
    background: rgba(15, 20, 40, 0.85);
    backdrop-filter: blur(10px);
    padding: 45px 35px;
    border-radius: 22px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 0 40px rgba(0, 140, 255, 0.25);
    animation: fadeIn 1s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(25px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo {
    width: 150px;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 15px rgba(0, 170, 255, 0.6));
}

h1 {
    font-size: 32px;
    margin-bottom: 10px;
}

p {
    font-size: 16px;
    opacity: 0.8;
    margin-bottom: 30px;
}

.buttons {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.btn {
    padding: 16px;
    border-radius: 14px;
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    transition: 0.3s;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, transparent, rgba(255,255,255,0.25), transparent);
    transform: translateX(-100%);
    transition: 0.5s;
}

.btn:hover::after {
    transform: translateX(100%);
}

.btn.pc {
    background: linear-gradient(135deg, #00c9a7, #009f8b);
    box-shadow: 0 0 20px rgba(0, 201, 167, 0.4);
}

.btn.pc:hover {
    transform: scale(1.05);
}

.btn.mobile {
    background: linear-gradient(135deg, #4facfe, #00c6ff);
    box-shadow: 0 0 20px rgba(79, 172, 254, 0.4);
}

.btn.mobile:hover {
    transform: scale(1.05);
}

footer {
    margin-top: 28px;
    font-size: 13px;
    opacity: 0.55;
}