body {
    background-color: black;
    color: white;
    background-repeat: repeat;
    background-size: 800px 200px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

#node-info {
    position: fixed;
    top: 10px;
    right: 10px;
    width: 350px;
    background: rgba(0, 0, 0, 0.6);
    padding: 12px 16px;
    border-radius: 8px;
    color: white;
    border: 1px solid #444;
    z-index: 999;
}

#add-node-panel {
    position: absolute;
    bottom: 150px;
    left: 20px;
    z-index: 9999;

    background: rgba(0, 0, 0, 0.6);
    padding: 12px 16px;
    border-radius: 8px;
    color: white;
    border: 1px solid #444;
}

#add-node-form input {
    width: 150px;
    margin-bottom: 8px;
}

#add-node-panel h3 {
    margin-top: 0;
    font-size: 1.1em;
}

.techno-btn {
    background: #000;
    color: #fff;
    border: 2px solid #fff;
    border-radius: 4px;
    padding: 6px 16px;
    font-weight: 600;
    letter-spacing: 1px;
    font-family: 'Segoe UI', 'Roboto', 'Arial', sans-serif;
    box-shadow: 0 0 4px #fff3, 0 0 2px #fff3;
    cursor: pointer;
    text-shadow: 0 1px 2px #000b;
    transition: background .18s, color .18s, box-shadow .18s, border .18s;
}
.techno-btn:hover, .techno-btn:focus {
    background: #fff;
    color: #000;
    box-shadow: 0 0 12px #fff8, 0 0 2px #0006;
    border-color: #000;
}

#menu-btn {
    position: fixed;
    top: 18px;
    left: 18px;
    width: 42px;
    height: 42px;
    background: #000;
    border: 2px solid #fff;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10000;
}
#menu-btn .menu-icon {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
#menu-btn .menu-icon span {
    display: block;
    width: 22px;
    height: 3px;
    background: #fff;
    border-radius: 2px;
}

.login-container, .register-container {
    background: rgba(0,0,0,0.82);
    border: 1.5px solid #444;
    border-radius: 10px;
    box-shadow: 0 2px 16px #0006;
    padding: 32px 36px 28px 36px;
    display: flex;
    flex-direction: column;
    min-width: 260px;
    align-items: center;
}
.login-container h2, .register-container h2 {
    color: #fff;
    margin-bottom: 22px;
}
.login-container input, .register-container input {
    margin-bottom: 16px;
    padding: 9px 14px;
    border-radius: 5px;
    border: 1px solid #222;
    outline: none;
    font-size: 1em;
    background: #181818;
    color: #fff;
}
.login-container input:focus, .register-container input:focus {
    border: 1.5px solid #999;
}
.login-container .techno-btn, .register-container .techno-btn {
    width: 100%;
}
.login-container .back-btn, .register-container .back-btn {
    width: 100%;
    margin-top: 7px;
    background: transparent;
    color: #aaa;
    border: none;
    text-decoration: underline;
    text-align: center;
    cursor: pointer;
}
.login-container .back-btn:hover, .register-container .back-btn:hover {
    color: #fff;
}
.login-container img, .register-container img {
    width: 88px;
    display: block;
    margin: 0 auto 16px auto;
}

.thunder-bg {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%) rotate(180deg);
    width: 700px;
    max-width: 100vw;
    z-index: -1;
    opacity: 0.70;
    pointer-events: none;
}