* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', sans-serif;
}

body {
    background: #0a0f1f;
    color: white;
    display: flex;
    min-height: 100vh;
    overflow-x: hidden;
}

body.light-mode {
    background: #f4f7fb;
    color: #111;
}

.sidebar {
    width: 260px;
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(12px);
    border-right: 1px solid rgba(255,255,255,0.1);
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.logo {
    color: #00ffe5;
    margin-bottom: 50px;
    font-weight: bold;
}

.menu {
    list-style: none;
}

.menu li {
    margin-bottom: 20px;
}

.menu a {
    text-decoration: none;
    color: white;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 12px;
    transition: 0.3s;
}