body {
    margin: 0;
    height: 100vh;
    background: linear-gradient(135deg, #020b16, #0a1f3c);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Share Tech Mono', monospace;
    color: #00ff9c;
    overflow: hidden;
}

/* GLASS PANEL */
.intro-container {
    text-align: center;
    padding: 40px;
    background: rgba(255,255,255,0.06);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 16px;
    box-shadow: 0 0 40px rgba(0,255,156,0.15);
    animation: fadeIn 1.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

.logo {
    width: 180px;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 10px #00ff9c);
}

.title {
    font-size: 52px;
    letter-spacing: 6px;
    color: #00ff9c;
    text-shadow: 0 0 12px #00ff9c;
}

.desc {
    margin-top: 10px;
    font-size: 20px;
    color: #ffae42;
}

/* BUTTON */
.engage-btn {
    margin-top: 40px;
    padding: 16px 50px;
    font-size: 22px;
    background: rgba(0,255,156,0.1);
    border: 2px solid #00ff9c;
    color: #00ff9c;
    cursor: pointer;
    border-radius: 10px;
    transition: 0.25s ease;
    backdrop-filter: blur(6px);
}

.engage-btn:hover {
    transform: scale(1.08);
    background: rgba(0,255,156,0.2);
    box-shadow: 0 0 20px #00ff9c;
}

/* LOADING SCREEN */
.hidden { display: none; }

.loading {
    position: absolute;
    bottom: 40px;
    width: 100%;
    text-align: center;
    animation: fadeIn 0.8s ease;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255,255,255,0.1);
    border-top-color: #00ff9c;
    border-radius: 50%;
    margin: 0 auto 20px;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.bar {
    width: 60%;
    height: 14px;
    background: rgba(255,255,255,0.08);
    margin: 0 auto;
    border-radius: 8px;
    overflow: hidden;
    backdrop-filter: blur(6px);
}

.bar-fill {
    width: 0%;
    height: 100%;
    background: #00ff9c;
    box-shadow: 0 0 20px #00ff9c;
    transition: width 0.3s ease;
}

.tip {
    margin-top: 15px;
    font-size: 18px;
    color: #ffae42;
    text-shadow: 0 0 8px #ffae42;
}