diff --git a/Cargo.lock b/Cargo.lock
index a8962f9..754e92b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -17,6 +17,15 @@ version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
 
+[[package]]
+name = "aho-corasick"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "anstream"
 version = "0.6.19"
@@ -695,6 +704,12 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "lazy_static"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
+
 [[package]]
 name = "libc"
 version = "0.2.174"
@@ -729,6 +744,15 @@ version = "0.4.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13dc2df351e3202783a1fe0d44375f7295ffb4049267b0f3018346dc122a1d94"
 
+[[package]]
+name = "matchers"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8263075bb86c5a1b1427b5ae862e8889656f126e9f77c484496e8b47cf5c5558"
+dependencies = [
+ "regex-automata 0.1.10",
+]
+
 [[package]]
 name = "memchr"
 version = "2.7.5"
@@ -778,6 +802,16 @@ dependencies = [
  "tempfile",
 ]
 
+[[package]]
+name = "nu-ansi-term"
+version = "0.46.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77a8165726e8236064dbb45459242600304b42a5ea24ee2948e18e023bf7ba84"
+dependencies = [
+ "overload",
+ "winapi",
+]
+
 [[package]]
 name = "object"
 version = "0.36.7"
@@ -843,6 +877,12 @@ dependencies = [
  "vcpkg",
 ]
 
+[[package]]
+name = "overload"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b15813163c1d831bf4a13c3610c05c0d03b39feb07f7e09fa234dac9b15aaf39"
+
 [[package]]
 name = "parking_lot"
 version = "0.12.4"
@@ -932,6 +972,50 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "regex"
+version = "1.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b544ef1b4eac5dc2db33ea63606ae9ffcfac26c1416a2806ae0bf5f56b201191"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-automata 0.4.9",
+ "regex-syntax 0.8.5",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"
+dependencies = [
+ "regex-syntax 0.6.29",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.4.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "809e8dc61f6de73b46c85f4c96486310fe304c434cfa43669d7b40f711150908"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax 0.8.5",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f162c6dd7b008981e4d40210aca20b4bd0f9b60ca9271061b07f78537722f2e1"
+
+[[package]]
+name = "regex-syntax"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b15c43186be67a4fd63bee50d0303afffcef381492ebe2c5d87f324e1b8815c"
+
 [[package]]
 name = "reqwest"
 version = "0.12.20"
@@ -1065,6 +1149,8 @@ dependencies = [
  "serde",
  "serde_json",
  "tokio",
+ "tracing",
+ "tracing-subscriber",
 ]
 
 [[package]]
@@ -1149,6 +1235,15 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "sharded-slab"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f40ca3c46823713e0d4209592e8d6e826aa57e928f09752619fc696c499637f6"
+dependencies = [
+ "lazy_static",
+]
+
 [[package]]
 name = "shlex"
 version = "1.3.0"
@@ -1269,6 +1364,15 @@ dependencies = [
  "windows-sys 0.59.0",
 ]
 
+[[package]]
+name = "thread_local"
+version = "1.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f60246a4944f24f6e018aa17cdeffb7818b76356965d03b07d6a9886e8962185"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "tinystr"
 version = "0.8.1"
@@ -1393,9 +1497,21 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "784e0ac535deb450455cbfa28a6f0df145ea1bb7ae51b821cf5e7927fdcfbdd0"
 dependencies = [
  "pin-project-lite",
+ "tracing-attributes",
  "tracing-core",
 ]
 
+[[package]]
+name = "tracing-attributes"
+version = "0.1.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b1ffbcf9c6f6b99d386e7444eb608ba646ae452a36b39737deb9663b610f662"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "tracing-core"
 version = "0.1.34"
@@ -1403,6 +1519,36 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b9d12581f227e93f094d3af2ae690a574abb8a2b9b7a96e7cfe9647b2b617678"
 dependencies = [
  "once_cell",
+ "valuable",
+]
+
+[[package]]
+name = "tracing-log"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee855f1f400bd0e5c02d150ae5de3840039a3f54b025156404e34c23c03f47c3"
+dependencies = [
+ "log",
+ "once_cell",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.3.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e8189decb5ac0fa7bc8b96b7cb9b2701d60d48805aca84a238004d665fcc4008"
+dependencies = [
+ "matchers",
+ "nu-ansi-term",
+ "once_cell",
+ "regex",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing",
+ "tracing-core",
+ "tracing-log",
 ]
 
 [[package]]
@@ -1446,6 +1592,12 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
 
+[[package]]
+name = "valuable"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba73ea9cf16a25df0c8caa16c51acb937d5712a8429db78a3ee29d5dcacd3a65"
+
 [[package]]
 name = "vcpkg"
 version = "0.2.15"
@@ -1570,6 +1722,28 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
 [[package]]
 name = "windows-link"
 version = "0.1.3"
diff --git a/Cargo.toml b/Cargo.toml
index 59b2584..3c22c18 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,3 +11,5 @@ serde = { version = "1.0", features = ["derive"] }
 tokio = { version = "1.45", features = ["full"] }
 clap = { version = "4.5", features = ["derive"] }
 reqwest = { version = "0.12", features = ["json", "stream", "blocking"] }
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
diff --git a/src/cli.rs b/src/cli.rs
index 7bc605b..308957a 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -15,4 +15,8 @@ pub struct Args {
     /// Number of concurrent download operations.
     #[arg(long, default_value_t = 10)]
     pub concurrency: usize,
+
+    /// Increase logging verbosity. Can be used multiple times (e.g., -v, -vv).
+    #[arg(short, long, action = clap::ArgAction::Count)]
+    pub verbose: u8,
 }
diff --git a/src/downloader.rs b/src/downloader.rs
index 8291b6f..14dcbef 100644
--- a/src/downloader.rs
+++ b/src/downloader.rs
@@ -3,6 +3,7 @@ use futures::{StreamExt, stream};
 use std::collections::HashSet;
 use std::fs;
 use std::path::{Path, PathBuf};
+use tracing::{debug, error, info, instrument, warn};
 
 /// A report summarizing the outcome of the download process.
 #[derive(Debug)]
@@ -21,8 +22,9 @@ pub fn url_to_filename(url: &str) -> Result<String> {
 }
 
 /// Scans the output directory and removes any files not in the expected set.
+#[instrument(skip(output_dir, expected_files))]
 pub fn cleanup_stale_files(output_dir: &Path, expected_files: &HashSet<PathBuf>) -> Result<()> {
-    println!("\n▶️  Cleaning up stale rule files...");
+    info!("Checking for stale rule files...");
     let mut cleaned_count = 0;
 
     for entry in fs::read_dir(output_dir)
@@ -31,43 +33,40 @@ pub fn cleanup_stale_files(output_dir: &Path, expected_files: &HashSet<PathBuf>)
         let entry = entry?;
         let path = entry.path();
 
-        // Ignore directories and files that are not rule files (e.g., .tmp files)
         if !path.is_file() {
             continue;
         }
 
-        // If the file is not in our set of expected files, remove it.
         if !expected_files.contains(&path) {
             match fs::remove_file(&path) {
                 Ok(_) => {
-                    println!("[CLEAN]    Removed stale file {}", path.display());
+                    info!(path = %path.display(), "Removed stale file");
                     cleaned_count += 1;
                 }
                 Err(e) => {
-                    eprintln!(
-                        "[WARN]     Failed to remove stale file {}: {}",
-                        path.display(),
-                        e
-                    );
+                    warn!(path = %path.display(), error = %e, "Failed to remove stale file");
                 }
             }
         }
     }
-    if cleaned_count == 0 {
-        println!("[CLEAN]  No stale files found to clean up.");
+
+    if cleaned_count > 0 {
+        info!(count = cleaned_count, "Cleanup complete.");
     } else {
-        println!("[CLEAN]  Cleaned up {} stale files.", cleaned_count);
+        debug!("No stale files found.");
     }
+
     Ok(())
 }
 
 /// Downloads a list of URLs concurrently, with a specified limit.
+#[instrument(skip_all, fields(count = urls.len(), concurrency))]
 pub async fn download_all_rules(
     urls: &[String],
     output_dir: &Path,
     concurrency: usize,
 ) -> Result<DownloadReport> {
-    println!("\n▶️  Starting download process...");
+    info!("Starting download process...");
     let client = reqwest::Client::new();
     let mut successful = 0;
     let mut failed = 0;
@@ -79,11 +78,11 @@ pub async fn download_all_rules(
             async move {
                 match download_rule(&client, url, &output_path).await {
                     Ok(path) => {
-                        println!("[OK]       Saved {}", path.display());
+                        debug!(path = %path.display(), "Rule saved successfully");
                         Ok(())
                     }
                     Err(e) => {
-                        eprintln!("[FAIL]     Download error for {}: {:?}", url, e);
+                        error!(url, error = ?e, "Download failed");
                         Err(())
                     }
                 }
@@ -105,23 +104,20 @@ pub async fn download_all_rules(
 }
 
 /// Downloads a single file from a URL to a destination directory.
-/// Uses a temporary file to ensure atomic writes.
+#[instrument(skip(client, output_dir), fields(url))]
 async fn download_rule(client: &reqwest::Client, url: &str, output_dir: &Path) -> Result<PathBuf> {
     let file_name = url_to_filename(url)?;
-    println!("[DOWNLOAD] from {}", url);
+    debug!(file_name, "Downloading rule");
 
     let final_path = output_dir.join(&file_name);
     let tmp_path = output_dir.join(format!("{}.tmp", file_name));
 
-    // Perform the download
     let response = client.get(url).send().await?.error_for_status()?;
     let content = response.bytes().await?;
 
-    // Write to a temporary file first
     fs::write(&tmp_path, &content)
         .with_context(|| format!("Failed to write temporary file {}", tmp_path.display()))?;
 
-    // Atomically rename the temporary file to the final destination
     fs::rename(&tmp_path, &final_path)
         .with_context(|| format!("Failed to rename temp file to {}", final_path.display()))?;
 
diff --git a/src/lib.rs b/src/lib.rs
index 32d3183..909ace7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,6 @@
 use anyhow::{Context, Result, bail};
 use std::fs;
+use tracing::{info, instrument};
 
 pub mod cli;
 pub mod config;
@@ -9,17 +10,18 @@ use cli::Args;
 use config::Config;
 
 /// The main application logic.
+#[instrument(skip_all, fields(
+    config_file = %args.input.display(),
+    output_dir = %args.output.display()
+))]
 pub async fn run(args: Args) -> Result<()> {
-    println!("▶️  Starting ruleset processor...");
-    println!("    Config file:      {}", args.input.display());
-    println!("    Output directory:   {}", args.output.display());
-    println!("    Concurrency level:  {}", args.concurrency);
+    info!("Starting ruleset processor");
 
-    // Load and parse the configuration file into strongly-typed structs.
+    // Load and parse the configuration file.
     let config = Config::load(&args.input)
         .with_context(|| format!("Failed to load config from {}", args.input.display()))?;
 
-    // Ensure the output directory exists before any operations.
+    // Ensure the output directory exists.
     fs::create_dir_all(&args.output).with_context(|| {
         format!(
             "Failed to create output directory '{}'",
@@ -27,33 +29,34 @@ pub async fn run(args: Args) -> Result<()> {
         )
     })?;
 
-    // Determine the set of files that should exist based on the config.
+    // Determine the set of files that should exist.
     let expected_files = config
         .get_expected_files(&args.output)
         .context("Failed to determine expected files from config")?;
 
-    // Clean up any files in the output directory that are not in our expected set.
+    // Clean up any stale files.
     downloader::cleanup_stale_files(&args.output, &expected_files)?;
 
     // Proceed to download files defined in the config.
     let urls_to_download = config.extract_urls();
     if urls_to_download.is_empty() {
-        println!("\n✔️  No rule sets with URLs found. Process complete.");
+        info!("No rule sets with URLs found in config. Process complete.");
         return Ok(());
     }
-    println!(
-        "\n✔️  Found {} rule sets to download/update.",
-        urls_to_download.len()
+
+    info!(
+        count = urls_to_download.len(),
+        "Found rule sets to download/update."
     );
 
     // Download all files concurrently.
     let download_report =
         downloader::download_all_rules(&urls_to_download, &args.output, args.concurrency).await?;
 
-    println!("\n✅ Download process finished.");
-    println!(
-        "   {} successful, {} failed.",
-        download_report.successful, download_report.failed
+    info!(
+        successful = download_report.successful,
+        failed = download_report.failed,
+        "Download process finished."
     );
 
     // If any downloads failed, abort with an error message.
@@ -64,6 +67,6 @@ pub async fn run(args: Args) -> Result<()> {
         );
     }
 
-    println!("\n✔️  Ruleset synchronization complete.");
+    info!("Ruleset synchronization completed successfully.");
     Ok(())
 }
diff --git a/src/main.rs b/src/main.rs
index 7d0bf15..2fb1eeb 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,15 +1,35 @@
 use anyhow::Result;
 use clap::Parser;
 use sb_ruleset_sync::cli::Args;
+use tracing::error;
 
 #[tokio::main]
 async fn main() -> Result<()> {
-    // 1. Parse command-line arguments.
+    // 1. Parse command-line arguments first to get the verbosity level.
     let args = Args::parse();
 
-    // 2. Execute the main application logic from the library.
+    // 2. Set up the tracing subscriber.
+    // This configures a logger that prints to the console.
+    // The verbosity is controlled by the `-v` flag.
+    let log_level = match args.verbose {
+        0 => "info",  // Default level
+        1 => "debug", // -v
+        _ => "trace", // -vv or more
+    };
+
+    // We construct a filter that applies the log level to our crate,
+    // but keeps other crates at a higher level (e.g., info) to reduce noise.
+    let filter = format!("sb_ruleset_sync={}", log_level);
+
+    tracing_subscriber::fmt()
+        .with_env_filter(filter)
+        .with_writer(std::io::stderr) // Log to stderr, common for daemons/cron
+        .init();
+
+    // 3. Execute the main application logic.
     if let Err(e) = sb_ruleset_sync::run(args).await {
-        eprintln!("\nError: {e:?}");
+        // Log the final error in a structured way before exiting.
+        error!(error = ?e, "Application failed");
         std::process::exit(1);
     }