diff --git a/Dockerfile b/Dockerfile
index f7478f9..8d77c5f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,140 +1,104 @@
-FROM nvidia/cuda:12.8.0-runtime-ubuntu24.04
+# syntax=docker/dockerfile:1.7
+ARG CUDA_VER=12.8.0
+ARG UBUNTU_VER=24.04
 
-# Core runtime + build deps + GL/GLVND
-RUN apt-get update && apt-get install -y \
-    # graphics / GL
-    libglvnd0 \
-    libgl1 \
-    libgl1-mesa-dev \
-    mesa-common-dev \
-    libegl1 \
-    libgles2 \
-    libx11-6 \
-    libxext6 \
-    xvfb \
-    libgtk-3-0 \
-    libgtk-3-dev \
-    libglib2.0-dev \
-    \
-    # build tools
-    build-essential \
-    autoconf \
-    pkg-config \
-    curl \
-    wget \
-    git \
-    git-lfs \
-    jq \
-    libssl-dev \
-    ca-certificates \
-    \
-    # compression/tools
-    unzip \
+FROM nvidia/cuda:${CUDA_VER}-devel-ubuntu${UBUNTU_VER} AS builder
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential autoconf pkg-config git git-lfs curl wget jq ca-certificates \
+    libpng-dev libfreetype6-dev libfontconfig1-dev libxml2-dev ghostscript webp \
+    libgtk-3-dev libglib2.0-dev \
+  && rm -rf /var/lib/apt/lists/*
+
+ARG GO_VERSION=1.24.1
+RUN curl -fsSL "https://go.dev/dl/go${GO_VERSION}.linux-amd64.tar.gz" -o /tmp/go.tgz \
+ && rm -rf /usr/local/go \
+ && tar -C /usr/local -xzf /tmp/go.tgz \
+ && rm /tmp/go.tgz
+ENV PATH=/usr/local/go/bin:$PATH
+
+RUN git clone --depth 1 --branch fix-screenshot-slider-ticks \
+      https://github.com/Arlind-dev/danser-go.git /src/danser \
+ && cd /src/danser \
+ && go build -ldflags="-s -w" -o /out/danser-cli . \
+ && strip /out/danser-cli || true
+
+RUN set -eux; \
+  mkdir -p /out/ffmpeg; \
+  URL="$(curl -s https://api.github.com/repos/BtbN/FFmpeg-Builds/releases/latest \
+      | jq -r '.assets[].browser_download_url' \
+      | grep -E 'linux64-gpl(\-shared)?\.tar\.xz$' \
+      | head -n 1)"; \
+  wget -qO /tmp/ffmpeg.tar.xz "$URL"; \
+  tar -xf /tmp/ffmpeg.tar.xz -C /tmp; \
+  FF_DIR="$(find /tmp -maxdepth 1 -type d -name 'ffmpeg-*' | head -n 1)"; \
+  cp "$FF_DIR/bin/ffmpeg" /out/ffmpeg/; \
+  cp "$FF_DIR/bin/ffprobe" /out/ffmpeg/ || true; \
+  cp "$FF_DIR/bin/ffplay"  /out/ffmpeg/ || true; \
+  if [ -d "$FF_DIR/lib" ]; then mkdir -p /out/ffmpeg/lib && cp -a "$FF_DIR/lib/." /out/ffmpeg/lib/; fi; \
+  rm -rf /tmp/ffmpeg* /tmp/ffmpeg.tar.xz
+
+RUN set -eux; \
+  IMAGICK_URL="$(curl -s https://api.github.com/repos/ImageMagick/ImageMagick/releases/latest | jq -r '.tarball_url')"; \
+  mkdir -p /tmp/im; \
+  wget -qO- "$IMAGICK_URL" | tar xz -C /tmp; \
+  cd /tmp/ImageMagick-*; \
+  ./configure --prefix=/usr/local \
+    --disable-dependency-tracking \
+    --disable-docs \
+    --without-perl \
+    --with-fontconfig=yes \
+    --with-freetype=yes \
+    --with-gslib=yes \
+    --with-jpeg=yes \
+    --with-png=yes \
+    --with-tiff=yes \
+    --with-xml=yes; \
+  make -j"$(nproc)"; \
+  make install DESTDIR=/tmp/im; \
+  rm -rf /tmp/ImageMagick-*
+
+FROM nvidia/cuda:${CUDA_VER}-runtime-ubuntu${UBUNTU_VER} AS runtime
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    git curl ca-certificates \
     xz-utils \
-    zip \
-    \
-    # image / media deps
-    libpng-dev \
-    libfreetype6-dev \
-    libfontconfig1-dev \
-    libxml2 \
-    libxml2-dev \
-    ghostscript \
-    webp \
-    \
-    # fonts
-    fonts-urw-base35 \
-    fonts-noto-color-emoji \
-    fonts-dejavu-core \
-    \
-    && fc-cache -f -v \
-    && apt-get clean \
-    && rm -rf /var/lib/apt/lists/*
+    libglvnd0 libgl1 libegl1 libgles2 \
+    libx11-6 libxext6 \
+    xvfb \
+    libgtk-3-0 libglib2.0-0 \
+    libpng16-16 libfreetype6 libfontconfig1 libxml2 ghostscript webp \
+    fonts-urw-base35 fonts-noto-color-emoji fonts-dejavu-core \
+  && rm -rf /var/lib/apt/lists/* \
+  && fc-cache -f -v
 
-# Vulkan / GL debug tools (optional but handy)
-RUN apt-get update && apt-get install -y \
-    vulkan-tools \
-    mesa-utils \
-    && rm -rf /var/lib/apt/lists/*
+ARG NODE_VERSION=20.11.1
+RUN curl -fsSL "https://nodejs.org/dist/v${NODE_VERSION}/node-v${NODE_VERSION}-linux-x64.tar.xz" -o /tmp/node.tar.xz \
+ && tar -C /usr/local --strip-components=1 -xf /tmp/node.tar.xz \
+ && rm /tmp/node.tar.xz \
+ && node --version \
+ && npm --version
 
-# NVIDIA GLVND env (paths used by nvidia-container-runtime)
 ENV LD_LIBRARY_PATH=/usr/local/nvidia/lib:/usr/local/nvidia/lib64:${LD_LIBRARY_PATH}
 ENV __GLX_VENDOR_LIBRARY_NAME=nvidia
 
-# Go toolchain
-RUN curl -fsSL https://go.dev/dl/go1.24.1.linux-amd64.tar.gz -o /tmp/go.tar.gz && \
-    rm -rf /usr/local/go && \
-    tar -C /usr/local -xzf /tmp/go.tar.gz && \
-    ln -s /usr/local/go/bin/go /usr/local/bin/go && \
-    rm /tmp/go.tar.gz
+RUN groupadd -g 1000 appuser 2>/dev/null || true \
+ && id -u 1000 >/dev/null 2>&1 || useradd -u 1000 -g 1000 -m -s /bin/bash appuser \
+ && mkdir -p /app/danser/{songs,settings,videos,screenshots,custom-replays,skins/default-skin,ffmpeg}
 
-# danser build
-RUN git clone --branch fix-screenshot-slider-ticks --single-branch https://github.com/Arlind-dev/danser-go.git /app/danser && \
-    cd /app/danser && \
-    go build -o danser-cli . && \
-    chmod +x /app/danser/danser-cli
+COPY --from=builder /out/danser-cli      /app/danser/danser-cli
+COPY --from=builder /out/ffmpeg/         /app/danser/ffmpeg/
+COPY --from=builder /tmp/im/usr/local/   /usr/local/
 
-RUN mkdir -p /app/danser/songs \
-    /app/danser/settings \
-    /app/danser/videos \
-    /app/danser/screenshots
+ENV LD_LIBRARY_PATH=/app/danser/ffmpeg/lib:${LD_LIBRARY_PATH}
+RUN ldconfig
 
-# FFmpeg (prebuilt bundle)
-RUN wget -qO- $(curl -s https://api.github.com/repos/BtbN/FFmpeg-Builds/releases/latest \
-    | grep "browser_download_url.*linux64-gpl-shared.tar.xz" \
-    | cut -d '"' -f 4) -O /tmp/ffmpeg.tar.xz && \
-    tar -xvf /tmp/ffmpeg.tar.xz -C /tmp && \
-    mv /tmp/ffmpeg-*/bin/* /usr/local/bin/ && \
-    mv /tmp/ffmpeg-*/lib/* /usr/local/lib/ && \
-    mv /tmp/ffmpeg-*/include/* /usr/local/include/ && \
-    mkdir -p /app/danser/ffmpeg && \
-    cp /usr/local/bin/ffmpeg /app/danser/ffmpeg/ && \
-    cp /usr/local/bin/ffprobe /app/danser/ffmpeg/ || true && \
-    cp /usr/local/bin/ffplay /app/danser/ffmpeg/ || true && \
-    ldconfig
-
-# ImageMagick build
-RUN IMAGICK_URL=$(curl -s https://api.github.com/repos/ImageMagick/ImageMagick/releases/latest \
-    | jq -r '.tarball_url') && \
-    wget -qO- "$IMAGICK_URL" | tar xz && \
-    cd ImageMagick-* && \
-    ./configure --prefix=/usr/local \
-      --with-bzlib=yes \
-      --with-fontconfig=yes \
-      --with-freetype=yes \
-      --with-gslib=yes \
-      --with-gvc=yes \
-      --with-jpeg=yes \
-      --with-jp2=yes \
-      --with-png=yes \
-      --with-tiff=yes \
-      --with-xml=yes \
-      --with-gs-font-dir=yes && \
-    make -j$(nproc) && \
-    make install && \
-    ldconfig /usr/local/lib/ && \
-    cd / && rm -rf ImageMagick-*
-
-# NodeJS 20
-RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash - \
-    && apt-get install -y nodejs \
-    && npm install -g npm@latest \
-    && rm -rf /var/lib/apt/lists/*
-
-# danser dirs + assets
-RUN mkdir -p /app/danser/custom-replays/ \
-             /app/danser/skins/default-skin/
-
-COPY src/maps/*           /app/danser/songs/
-COPY src/replays/*        /app/danser/custom-replays/
-COPY src/settings/*       /app/danser/settings/
-COPY src/default-skin/    /app/danser/skins/default-skin/
-
-# non-root user 1000:1000 (safe even if uid/gid already exist)
-RUN groupadd -g 1000 appuser 2>/dev/null || true && \
-    id -u 1000 >/dev/null 2>&1 || useradd -u 1000 -g 1000 -m -s /bin/bash appuser && \
-    chown -R 1000:1000 /app
+COPY --chown=1000:1000 src/maps/         /app/danser/songs/
+COPY --chown=1000:1000 src/replays/      /app/danser/custom-replays/
+COPY --chown=1000:1000 src/settings/     /app/danser/settings/
+COPY --chown=1000:1000 src/default-skin/ /app/danser/skins/default-skin/
 
 USER 1000:1000
-
 WORKDIR /app/danser