:root {
    --op-bg: #1a1a2e; /* Deep space blue */
    --op-text: #e0e0e0;
    --op-primary: #ff4081; /* Neon pink */
    --op-secondary: #00e5ff; /* Cyan */
    --op-card: #16213e;
    --op-border: rgba(255, 64, 129, 0.3);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background-color: var(--op-bg); color: var(--op-text);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6; overflow-x: hidden;
}

/* Background Effect */
.op-bg-effect {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; z-index: -1;
    background: radial-gradient(circle at center, #1a1a2e 0%, #0f0f1a 100%);
    opacity: 0.8;
}
.op-bg-effect::after {
    content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    background-image: linear-gradient(var(--op-border) 1px, transparent 1px),
                      linear-gradient(90deg, var(--op-border) 1px, transparent 1px);
    background-size: 50px 50px; opacity: 0.1;
    transform: perspective(500px) rotateX(60deg) translateY(-100px) translateZ(-200px);
    animation: gridMove 20s linear infinite;
}
@keyframes gridMove {
    0% { transform: perspective(500px) rotateX(60deg) translateY(0) translateZ(-200px); }
    100% { transform: perspective(500px) rotateX(60deg) translateY(50px) translateZ(-200px); }
}

.op-container { max-width: 1100px; margin: 0 auto; padding: 0 30px; position: relative; z-index: 1;}

/* Header */
.op-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 25px 0; margin-bottom: 40px;
}
.op-brand {
    font-size: 28px; font-weight: 900; color: var(--op-primary);
    text-transform: uppercase; letter-spacing: 2px;
    text-shadow: 0 0 10px var(--op-primary);
}
.op-nav { display: flex; gap: 30px; }
.op-nav a {
    color: var(--op-text); text-decoration: none; font-size: 15px;
    text-transform: uppercase; letter-spacing: 1px; transition: color 0.3s;
}
.op-nav a:hover, .op-nav a.active { color: var(--op-secondary); text-shadow: 0 0 8px var(--op-secondary); }

/* Hero */
.op-hero {
    text-align: center; padding: 80px 0; margin-bottom: 60px;
}
.op-hero h1 {
    font-size: 48px; color: #fff; margin-bottom: 20px;
    text-shadow: 0 0 15px var(--op-secondary);
}
.op-hero p { font-size: 18px; color: #aaa; margin-bottom: 40px; max-width: 700px; margin-left: auto; margin-right: auto;}

.btn-op {
    display: inline-block; padding: 16px 45px; font-size: 16px; font-weight: bold;
    color: #fff; background: transparent; border: 2px solid var(--op-primary);
    text-decoration: none; text-transform: uppercase; letter-spacing: 2px;
    box-shadow: 0 0 15px rgba(255, 64, 129, 0.4) inset;
    transition: all 0.3s ease; border-radius: 30px;
}
.btn-op:hover {
    background: var(--op-primary); box-shadow: 0 0 25px var(--op-primary);
    color: #fff;
}

/* Features */
.op-features { margin-bottom: 80px; }
.op-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.op-card {
    background: var(--op-card); padding: 40px 30px; border-radius: 15px;
    border: 1px solid rgba(0, 229, 255, 0.2); text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}
.op-card:hover {
    transform: translateY(-10px); box-shadow: 0 15px 30px rgba(0, 229, 255, 0.15);
    border-color: var(--op-secondary);
}
.op-icon { font-size: 40px; margin-bottom: 20px; color: var(--op-secondary); }
.op-card h3 { font-size: 20px; color: #fff; margin-bottom: 15px; }
.op-card p { font-size: 14px; color: #888; }

/* FAQ */
.op-faq { margin-bottom: 80px; background: rgba(22, 33, 62, 0.7); padding: 50px; border-radius: 20px; border: 1px solid var(--op-border);}
.op-faq h2 { font-size: 28px; text-align: center; margin-bottom: 40px; color: var(--op-primary); }
.o-faq-item { margin-bottom: 25px; }
.o-fq { font-size: 18px; font-weight: bold; color: var(--op-secondary); margin-bottom: 10px; display: flex; align-items: center; gap: 10px;}
.o-fq::before { content: '>?'; font-family: monospace; color: var(--op-primary);}
.o-fa { font-size: 15px; color: #ccc; padding-left: 35px;}

footer {
    text-align: center; padding: 40px 0; color: #555; font-size: 13px;
    border-top: 1px solid rgba(255, 255, 255, 0.05); margin-top: 50px;
}

@media (max-width: 768px) {
    .op-header { flex-direction: column; gap: 20px; }
    .op-grid { grid-template-columns: 1fr; }
    .op-hero h1 { font-size: 36px; }
    .op-faq { padding: 30px 20px; }
}