:root {
    --bg: #04070a;
    --card-bg: #0b0f14;
    --accent: #00ff9d;
    --text: #d5ffe9;
    --highlight: #0affc6;
    --gradient: linear-gradient(135deg, #00ff9d 0%, #00d0ff 100%);
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "Inter", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    letter-spacing: 0.5px;
}
header {
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 255, 157, 0.2);
    position: sticky;
    top: 0;
    z-index: 20;
}
header .logo-container {
    display: flex;
    align-items: center;
    gap: 15px;
}
header .logo-container img {
    height: 40px;
}
header .brand {
    background: var(--gradient);
    -webkit-background-clip: text;
    color: transparent;
    font-size: 1.8rem;
    margin: 0;
    font-weight: 700;
}
nav a {
    margin-left: 20px;
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: 0.3s;
}
nav a:hover {
    color: var(--accent);
}