:root {
    --bg: #030712;
    --card-bg: #111827;
    --accent: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.2);
    --text: #f3f4f6;
    --text-dim: #9ca3af;
    --border: rgba(255, 255, 255, 0.1);
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    height: 100vh;
    overflow: hidden;
}

.radar-bg {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: 
        radial-gradient(circle at 50% 50%, var(--accent-glow) 0%, transparent 60%),
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 100% 100%, 40px 40px, 40px 40px;
    z-index: 1;
    opacity: 0.3;
}

.app-container {
    position: relative;
    z-index: 10;
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border);
    padding: 2rem 1rem;
    display: flex;
    flex-direction: column;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 800;
    font-size: 1.25rem;
    margin-bottom: 3rem;
    color: var(--accent);
}

nav { flex: 1; }
.nav-item {
    width: 100%;
    background: none;
    border: none;
    padding: 1rem;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    border-radius: 8px;
    transition: 0.3s;
    font-weight: 500;
}

.nav-item:hover { background: rgba(255,255,255,0.05); color: var(--text); }
.nav-item.active { background: var(--accent); color: white; }

.back-link {
    padding: 1rem;
    color: var(--text-dim);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

/* Content */
.content { flex: 1; padding: 4rem; overflow-y: auto; }
.tool-pane { display: none; max-width: 1000px; margin: 0 auto; }
.tool-pane.active { display: block; animation: fadeIn 0.4s ease-out; }

@keyframes fadeIn { from { opacity: 0; transform: scale(0.98); } to { opacity: 1; transform: scale(1); } }

.header { margin-bottom: 2.5rem; }
.header h1 { font-size: 2.5rem; font-weight: 800; margin-bottom: 0.5rem; }
.header p { color: var(--text-dim); }

.search-box {
    display: flex;
    gap: 1rem;
    background: var(--card-bg);
    padding: 0.5rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    margin-bottom: 3rem;
}

.search-box input {
    flex: 1;
    background: none;
    border: none;
    padding: 1rem;
    color: white;
    font-size: 1.1rem;
    outline: none;
}

.search-box button {
    background: var(--accent);
    color: white;
    border: none;
    padding: 0 2rem;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    transition: 0.3s;
}

.results-window {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    min-height: 400px;
    padding: 2rem;
    font-family: 'Space Mono', monospace;
    line-height: 1.6;
}

.placeholder { color: var(--text-dim); text-align: center; margin-top: 100px; }

.dns-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.5rem; }
.dns-card { background: var(--card-bg); border: 1px solid var(--border); padding: 1.5rem; border-radius: 12px; }
.dns-card label { display: block; color: var(--accent); font-size: 0.7rem; font-weight: 800; margin-bottom: 0.5rem; }

.code-box {
    background: #000;
    padding: 2rem;
    border-radius: 12px;
    color: #4ade80;
    font-family: 'Space Mono', monospace;
    font-size: 0.9rem;
    overflow-x: auto;
}