diff --git a/engine/CMakeLists.txt b/engine/CMakeLists.txt
index 2016748..bff58b2 100644
--- a/engine/CMakeLists.txt
+++ b/engine/CMakeLists.txt
@@ -9,6 +9,8 @@ configure_file(
 
 add_library(pdfengine STATIC
     src/core/engine_info.cpp
+    src/core/graphics_state.cpp
+    src/core/display_list.cpp
     src/parser/pdfium_loader.cpp
     src/fonts/font_face.cpp
     src/fonts/hb_shaper.cpp
diff --git a/engine/include/pdfengine/display_list.hpp b/engine/include/pdfengine/display_list.hpp
new file mode 100644
index 0000000..d62b6f8
--- /dev/null
+++ b/engine/include/pdfengine/display_list.hpp
@@ -0,0 +1,88 @@
+#pragma once
+
+#include <vector>
+#include <memory>
+#include <string>
+#include <pdfengine/graphics_state.hpp>
+
+namespace pdfengine {
+
+class CommandVisitor;
+
+// Base class for all drawing commands
+struct Command {
+    virtual ~Command() = default;
+    virtual void accept(CommandVisitor& visitor) const = 0;
+};
+
+// --- Specific Command Types ---
+
+struct SaveStateCommand : public Command {
+    void accept(CommandVisitor& visitor) const override;
+};
+
+struct RestoreStateCommand : public Command {
+    void accept(CommandVisitor& visitor) const override;
+};
+
+struct SetTransformCommand : public Command {
+    Matrix matrix;
+    explicit SetTransformCommand(const Matrix& m) : matrix(m) {}
+    void accept(CommandVisitor& visitor) const override;
+};
+
+struct FillRectCommand : public Command {
+    float x, y, width, height;
+    FillRectCommand(float x, float y, float w, float h) : x(x), y(y), width(w), height(h) {}
+    void accept(CommandVisitor& visitor) const override;
+};
+
+struct DrawTextCommand : public Command {
+    std::string text;
+    float x, y;
+    // We would eventually have a font reference here too
+    DrawTextCommand(std::string text, float x, float y) : text(std::move(text)), x(x), y(y) {}
+    void accept(CommandVisitor& visitor) const override;
+};
+
+// --- Visitor Interface ---
+
+// The visitor interface that the renderer (or replay engine) implements
+class CommandVisitor {
+public:
+    virtual ~CommandVisitor() = default;
+    virtual void visit(const SaveStateCommand& cmd) = 0;
+    virtual void visit(const RestoreStateCommand& cmd) = 0;
+    virtual void visit(const SetTransformCommand& cmd) = 0;
+    virtual void visit(const FillRectCommand& cmd) = 0;
+    virtual void visit(const DrawTextCommand& cmd) = 0;
+};
+
+// --- Display List Container ---
+
+// A container that stores a sequence of drawing commands.
+class DisplayList {
+public:
+    DisplayList() = default;
+    
+    // Add commands directly
+    void addCommand(std::unique_ptr<Command> cmd);
+
+    // Replay the commands to a visitor (renderer)
+    void replay(CommandVisitor& visitor) const;
+
+    // Helper methods to easily append common commands
+    void saveState();
+    void restoreState();
+    void setTransform(const Matrix& m);
+    void fillRect(float x, float y, float w, float h);
+    void drawText(const std::string& text, float x, float y);
+
+    [[nodiscard]] size_t size() const noexcept { return m_commands.size(); }
+    void clear() { m_commands.clear(); }
+
+private:
+    std::vector<std::unique_ptr<Command>> m_commands;
+};
+
+} // namespace pdfengine
diff --git a/engine/include/pdfengine/graphics_state.hpp b/engine/include/pdfengine/graphics_state.hpp
new file mode 100644
index 0000000..1e2012d
--- /dev/null
+++ b/engine/include/pdfengine/graphics_state.hpp
@@ -0,0 +1,67 @@
+#pragma once
+
+#include <vector>
+#include <stdexcept>
+
+namespace pdfengine {
+
+// 2D Affine Transformation Matrix (3x3 matrix optimized for 2D)
+// [ a b 0 ]
+// [ c d 0 ]
+// [ e f 1 ]
+struct Matrix {
+    float a = 1.0f, b = 0.0f;
+    float c = 0.0f, d = 1.0f;
+    float e = 0.0f, f = 0.0f;
+
+    Matrix() = default;
+    Matrix(float a, float b, float c, float d, float e, float f)
+        : a(a), b(b), c(c), d(d), e(e), f(f) {}
+
+    // Multiply this matrix by another matrix
+    [[nodiscard]] Matrix multiply(const Matrix& other) const noexcept;
+
+    // Transform a 2D point using this matrix
+    void transform(float& x, float& y) const noexcept;
+};
+
+struct Color {
+    float r = 0.0f;
+    float g = 0.0f;
+    float b = 0.0f;
+};
+
+// Represents the current graphics state in a PDF document
+struct GraphicsState {
+    Matrix ctm; // Current Transformation Matrix
+    Color fillColor;
+    Color strokeColor;
+    float lineWidth = 1.0f;
+    
+    // In the future, this will also hold:
+    // - Clipping paths
+    // - Font state (current font, font size)
+    // - Dash patterns
+    // - Line cap/join styles
+};
+
+// Manages the q/Q stack of graphics states
+class GraphicsStateStack {
+public:
+    GraphicsStateStack();
+
+    // Corresponds to the 'q' operator (save graphics state)
+    void push();
+
+    // Corresponds to the 'Q' operator (restore graphics state)
+    void pop();
+
+    // Access the current active graphics state
+    [[nodiscard]] GraphicsState& current();
+    [[nodiscard]] const GraphicsState& current() const;
+
+private:
+    std::vector<GraphicsState> m_stack;
+};
+
+} // namespace pdfengine
diff --git a/engine/src/core/display_list.cpp b/engine/src/core/display_list.cpp
new file mode 100644
index 0000000..aac060a
--- /dev/null
+++ b/engine/src/core/display_list.cpp
@@ -0,0 +1,43 @@
+#include <pdfengine/display_list.hpp>
+
+namespace pdfengine {
+
+void SaveStateCommand::accept(CommandVisitor& visitor) const { visitor.visit(*this); }
+void RestoreStateCommand::accept(CommandVisitor& visitor) const { visitor.visit(*this); }
+void SetTransformCommand::accept(CommandVisitor& visitor) const { visitor.visit(*this); }
+void FillRectCommand::accept(CommandVisitor& visitor) const { visitor.visit(*this); }
+void DrawTextCommand::accept(CommandVisitor& visitor) const { visitor.visit(*this); }
+
+void DisplayList::addCommand(std::unique_ptr<Command> cmd) {
+    if (cmd) {
+        m_commands.push_back(std::move(cmd));
+    }
+}
+
+void DisplayList::replay(CommandVisitor& visitor) const {
+    for (const auto& cmd : m_commands) {
+        cmd->accept(visitor);
+    }
+}
+
+void DisplayList::saveState() {
+    addCommand(std::make_unique<SaveStateCommand>());
+}
+
+void DisplayList::restoreState() {
+    addCommand(std::make_unique<RestoreStateCommand>());
+}
+
+void DisplayList::setTransform(const Matrix& m) {
+    addCommand(std::make_unique<SetTransformCommand>(m));
+}
+
+void DisplayList::fillRect(float x, float y, float w, float h) {
+    addCommand(std::make_unique<FillRectCommand>(x, y, w, h));
+}
+
+void DisplayList::drawText(const std::string& text, float x, float y) {
+    addCommand(std::make_unique<DrawTextCommand>(text, x, y));
+}
+
+} // namespace pdfengine
diff --git a/engine/src/core/graphics_state.cpp b/engine/src/core/graphics_state.cpp
new file mode 100644
index 0000000..a6a4004
--- /dev/null
+++ b/engine/src/core/graphics_state.cpp
@@ -0,0 +1,57 @@
+#include <pdfengine/graphics_state.hpp>
+
+namespace pdfengine {
+
+Matrix Matrix::multiply(const Matrix& other) const noexcept {
+    return Matrix(
+        a * other.a + b * other.c,
+        a * other.b + b * other.d,
+        c * other.a + d * other.c,
+        c * other.b + d * other.d,
+        e * other.a + f * other.c + other.e,
+        e * other.b + f * other.d + other.f
+    );
+}
+
+void Matrix::transform(float& x, float& y) const noexcept {
+    float newX = a * x + c * y + e;
+    float newY = b * x + d * y + f;
+    x = newX;
+    y = newY;
+}
+
+GraphicsStateStack::GraphicsStateStack() {
+    // A PDF always starts with one default graphics state on the stack.
+    m_stack.emplace_back();
+}
+
+void GraphicsStateStack::push() {
+    // Duplicate the current state and push it onto the stack.
+    if (!m_stack.empty()) {
+        m_stack.push_back(m_stack.back());
+    } else {
+        m_stack.emplace_back();
+    }
+}
+
+void GraphicsStateStack::pop() {
+    // The stack should never be empty, but we must protect against popping the initial state
+    // if the PDF is malformed (e.g. more 'Q' operators than 'q' operators).
+    if (m_stack.size() > 1) {
+        m_stack.pop_back();
+    } else {
+        // We could throw an exception or just ignore the invalid pop.
+        // For a resilient engine, ignoring is often better, but we could log a warning.
+        // For now, we do nothing to prevent crashing on the root state.
+    }
+}
+
+GraphicsState& GraphicsStateStack::current() {
+    return m_stack.back();
+}
+
+const GraphicsState& GraphicsStateStack::current() const {
+    return m_stack.back();
+}
+
+} // namespace pdfengine
diff --git a/engine/tests/CMakeLists.txt b/engine/tests/CMakeLists.txt
index 08f8f19..7e8f1c5 100644
--- a/engine/tests/CMakeLists.txt
+++ b/engine/tests/CMakeLists.txt
@@ -3,6 +3,8 @@
 add_executable(pdfengine_smoke
     smoke_test.cpp
     fonts_test.cpp
+    graphics_state_test.cpp
+    display_list_test.cpp
 )
 
 target_link_libraries(pdfengine_smoke
diff --git a/engine/tests/display_list_test.cpp b/engine/tests/display_list_test.cpp
new file mode 100644
index 0000000..e2dd917
--- /dev/null
+++ b/engine/tests/display_list_test.cpp
@@ -0,0 +1,54 @@
+#include <gtest/gtest.h>
+#include <pdfengine/display_list.hpp>
+#include <string>
+#include <vector>
+
+using namespace pdfengine;
+
+// A simple visitor for testing that just records the sequence of visited commands.
+class MockVisitor : public CommandVisitor {
+public:
+    std::vector<std::string> calls;
+
+    void visit(const SaveStateCommand&) override { calls.push_back("SaveState"); }
+    void visit(const RestoreStateCommand&) override { calls.push_back("RestoreState"); }
+    void visit(const SetTransformCommand& cmd) override { calls.push_back("SetTransform(" + std::to_string(cmd.matrix.a) + ")"); }
+    void visit(const FillRectCommand& cmd) override { calls.push_back("FillRect(" + std::to_string(cmd.width) + ")"); }
+    void visit(const DrawTextCommand& cmd) override { calls.push_back("DrawText(" + cmd.text + ")"); }
+};
+
+TEST(DisplayListTest, RecordAndReplay) {
+    DisplayList list;
+    
+    EXPECT_EQ(list.size(), 0);
+    
+    // Record some commands
+    list.saveState();
+    list.setTransform(Matrix(2.0f, 0.0f, 0.0f, 2.0f, 0.0f, 0.0f));
+    list.fillRect(10.0f, 10.0f, 100.0f, 50.0f);
+    list.drawText("Hello World", 20.0f, 30.0f);
+    list.restoreState();
+
+    EXPECT_EQ(list.size(), 5);
+
+    // Replay to the mock visitor
+    MockVisitor visitor;
+    list.replay(visitor);
+
+    ASSERT_EQ(visitor.calls.size(), 5);
+    EXPECT_EQ(visitor.calls[0], "SaveState");
+    EXPECT_EQ(visitor.calls[1], "SetTransform(2.000000)");
+    EXPECT_EQ(visitor.calls[2], "FillRect(100.000000)");
+    EXPECT_EQ(visitor.calls[3], "DrawText(Hello World)");
+    EXPECT_EQ(visitor.calls[4], "RestoreState");
+}
+
+TEST(DisplayListTest, Clear) {
+    DisplayList list;
+    list.saveState();
+    list.fillRect(0, 0, 10, 10);
+    EXPECT_EQ(list.size(), 2);
+    
+    list.clear();
+    EXPECT_EQ(list.size(), 0);
+}
diff --git a/engine/tests/graphics_state_test.cpp b/engine/tests/graphics_state_test.cpp
new file mode 100644
index 0000000..95a7ee4
--- /dev/null
+++ b/engine/tests/graphics_state_test.cpp
@@ -0,0 +1,64 @@
+#include <gtest/gtest.h>
+#include <pdfengine/graphics_state.hpp>
+
+using namespace pdfengine;
+
+TEST(MatrixTest, DefaultIdentity) {
+    Matrix m;
+    EXPECT_FLOAT_EQ(m.a, 1.0f);
+    EXPECT_FLOAT_EQ(m.b, 0.0f);
+    EXPECT_FLOAT_EQ(m.c, 0.0f);
+    EXPECT_FLOAT_EQ(m.d, 1.0f);
+    EXPECT_FLOAT_EQ(m.e, 0.0f);
+    EXPECT_FLOAT_EQ(m.f, 0.0f);
+}
+
+TEST(MatrixTest, Multiply) {
+    Matrix m1(2.0f, 0.0f, 0.0f, 2.0f, 10.0f, 20.0f);
+    Matrix m2(0.5f, 0.0f, 0.0f, 0.5f, -5.0f, -10.0f);
+    Matrix result = m1.multiply(m2);
+    
+    EXPECT_FLOAT_EQ(result.a, 1.0f);
+    EXPECT_FLOAT_EQ(result.b, 0.0f);
+    EXPECT_FLOAT_EQ(result.c, 0.0f);
+    EXPECT_FLOAT_EQ(result.d, 1.0f);
+    EXPECT_FLOAT_EQ(result.e, 0.0f);
+    EXPECT_FLOAT_EQ(result.f, 0.0f);
+}
+
+TEST(MatrixTest, TransformPoint) {
+    Matrix m(2.0f, 0.0f, 0.0f, 3.0f, 10.0f, 20.0f);
+    float x = 5.0f;
+    float y = 5.0f;
+    m.transform(x, y);
+    
+    EXPECT_FLOAT_EQ(x, 20.0f); // 2*5 + 10
+    EXPECT_FLOAT_EQ(y, 35.0f); // 3*5 + 20
+}
+
+TEST(GraphicsStateStackTest, PushPop) {
+    GraphicsStateStack stack;
+    
+    // Initial state
+    stack.current().lineWidth = 5.0f;
+    
+    // Push new state
+    stack.push();
+    EXPECT_FLOAT_EQ(stack.current().lineWidth, 5.0f);
+    
+    // Modify current state
+    stack.current().lineWidth = 10.0f;
+    EXPECT_FLOAT_EQ(stack.current().lineWidth, 10.0f);
+    
+    // Pop back to initial
+    stack.pop();
+    EXPECT_FLOAT_EQ(stack.current().lineWidth, 5.0f);
+}
+
+TEST(GraphicsStateStackTest, PopEmptyProtection) {
+    GraphicsStateStack stack;
+    // Attempting to pop the root state should be safe (ignored)
+    stack.pop();
+    stack.current().lineWidth = 2.0f; // Should still be valid
+    EXPECT_FLOAT_EQ(stack.current().lineWidth, 2.0f);
+}
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index 390cc02..2ec3aeb 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -8,8 +8,10 @@
       "name": "frontend",
       "version": "0.0.0",
       "dependencies": {
+        "@tailwindcss/vite": "^4.3.0",
         "react": "^19.2.6",
-        "react-dom": "^19.2.6"
+        "react-dom": "^19.2.6",
+        "tailwindcss": "^4.3.0"
       },
       "devDependencies": {
         "@eslint/js": "^10.0.1",
@@ -57,7 +59,6 @@
       "integrity": "sha512-CGOfOJqWjg2qW/Mb6zNsDm+u5vFQ8DxXfbM09z69p5Z6+mE1ikP2jUXw+j42Pf1XTYED2Rni5f95npYeuwMDQA==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@babel/code-frame": "^7.29.0",
         "@babel/generator": "^7.29.0",
@@ -267,11 +268,31 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@emnapi/core": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/@emnapi/core/-/core-1.10.0.tgz",
+      "integrity": "sha512-yq6OkJ4p82CAfPl0u9mQebQHKPJkY7WrIuk205cTYnYe+k2Z8YBh11FrbRG/H6ihirqcacOgl2BIO8oyMQLeXw==",
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "@emnapi/wasi-threads": "1.2.1",
+        "tslib": "^2.4.0"
+      }
+    },
+    "node_modules/@emnapi/runtime": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/@emnapi/runtime/-/runtime-1.10.0.tgz",
+      "integrity": "sha512-ewvYlk86xUoGI0zQRNq/mC+16R1QeDlKQy21Ki3oSYXNgLb45GV1P6A0M+/s6nyCuNDqe5VpaY84BzXGwVbwFA==",
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "tslib": "^2.4.0"
+      }
+    },
     "node_modules/@emnapi/wasi-threads": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/@emnapi/wasi-threads/-/wasi-threads-1.2.1.tgz",
       "integrity": "sha512-uTII7OYF+/Mes/MrcIOYp5yOtSMLBWSIoLPpcgwipoiKbli6k322tcoFsxoIIxPDqW01SQGAgko4EzZi2BNv2w==",
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "dependencies": {
@@ -476,7 +497,6 @@
       "version": "0.3.13",
       "resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.13.tgz",
       "integrity": "sha512-2kkt/7niJ6MgEPxF0bYdQ6etZaA+fQvDcLKckhy1yIQOzaoKjBBjSj63/aLVjYE3qhRt5dvM+uUyfCg6UKCBbA==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "@jridgewell/sourcemap-codec": "^1.5.0",
@@ -487,7 +507,6 @@
       "version": "2.3.5",
       "resolved": "https://registry.npmjs.org/@jridgewell/remapping/-/remapping-2.3.5.tgz",
       "integrity": "sha512-LI9u/+laYG4Ds1TDKSJW2YPrIlcVYOwi2fUC6xB43lueCjgxV4lffOCZCtYFiH6TNOX+tQKXx97T4IKHbhyHEQ==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "@jridgewell/gen-mapping": "^0.3.5",
@@ -498,7 +517,6 @@
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.2.tgz",
       "integrity": "sha512-bRISgCIjP20/tbWSPWMEi54QVPRZExkuD9lJL+UIxUKtwVJA8wW1Trb1jMs1RFXo1CBTNZ/5hpC9QvmKWdopKw==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=6.0.0"
@@ -508,14 +526,12 @@
       "version": "1.5.5",
       "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.5.tgz",
       "integrity": "sha512-cYQ9310grqxueWbl+WuIUIaiUaDcj7WOq5fVhEljNVgRfOUhY9fy2zTvfoqWsnebh8Sl70VScFbICvJnLKB0Og==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/@jridgewell/trace-mapping": {
       "version": "0.3.31",
       "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.31.tgz",
       "integrity": "sha512-zzNR+SdQSDJzc8joaeP8QQoCQr8NuYx2dIIytl1QeBEZHJ9uW6hebsrYgbz8hJwUQao3TWCMtmfV8Nu1twOLAw==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "@jridgewell/resolve-uri": "^3.1.0",
@@ -526,7 +542,6 @@
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/@napi-rs/wasm-runtime/-/wasm-runtime-1.1.4.tgz",
       "integrity": "sha512-3NQNNgA1YSlJb/kMH1ildASP9HW7/7kYnRI2szWJaofaS1hWmbGI4H+d3+22aGzXXN9IJ+n+GiFVcGipJP18ow==",
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "dependencies": {
@@ -545,7 +560,6 @@
       "version": "0.130.0",
       "resolved": "https://registry.npmjs.org/@oxc-project/types/-/types-0.130.0.tgz",
       "integrity": "sha512-ibD2usx9JRu7f5pu2tMKMI4cpA4NgXJQoYRP4pQ7Pxmn1l6k/53qWtQWZayhYy3X4QZkt90Ot+mJEaeXouio6Q==",
-      "dev": true,
       "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/Boshen"
@@ -558,7 +572,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -575,7 +588,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -592,7 +604,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -609,7 +620,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -626,7 +636,6 @@
       "cpu": [
         "arm"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -643,7 +652,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -660,7 +668,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -677,7 +684,6 @@
       "cpu": [
         "ppc64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -694,7 +700,6 @@
       "cpu": [
         "s390x"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -711,7 +716,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -728,7 +732,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -745,7 +748,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -762,7 +764,6 @@
       "cpu": [
         "wasm32"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "dependencies": {
@@ -781,7 +782,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
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       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-10.2.5.tgz",
@@ -2159,7 +2429,6 @@
       "version": "3.3.12",
       "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.12.tgz",
       "integrity": "sha512-ZB9RH/39qpq5Vu6Y+NmUaFhQR6pp+M2Xt76XBnEwDaGcVAqhlvxrl3B2bKS5D3NH3QR76v3aSrKaF/Kiy7lEtQ==",
-      "dev": true,
       "funding": [
         {
           "type": "github",
@@ -2262,16 +2531,13 @@
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.1.1.tgz",
       "integrity": "sha512-xceH2snhtb5M9liqDsmEw56le376mTZkEX/jEb/RxNFyegNul7eNslCXP9FDj/Lcu0X8KEyMceP2ntpaHrDEVA==",
-      "dev": true,
       "license": "ISC"
     },
     "node_modules/picomatch": {
       "version": "4.0.4",
       "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.4.tgz",
       "integrity": "sha512-QP88BAKvMam/3NxH6vj2o21R6MjxZUAd6nlwAS/pnGvN9IVLocLHxGYIzFhg6fUQ+5th6P4dv4eW9jX3DSIj7A==",
-      "dev": true,
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=12"
       },
@@ -2283,7 +2549,6 @@
       "version": "8.5.14",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.14.tgz",
       "integrity": "sha512-SoSL4+OSEtR99LHFZQiJLkT59C5B1amGO1NzTwj7TT1qCUgUO6hxOvzkOYxD+vMrXBM3XJIKzokoERdqQq/Zmg==",
-      "dev": true,
       "funding": [
         {
           "type": "opencollective",
@@ -2333,7 +2598,6 @@
       "resolved": "https://registry.npmjs.org/react/-/react-19.2.6.tgz",
       "integrity": "sha512-sfWGGfavi0xr8Pg0sVsyHMAOziVYKgPLNrS7ig+ivMNb3wbCBw3KxtflsGBAwD3gYQlE/AEZsTLgToRrSCjb0Q==",
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=0.10.0"
       }
@@ -2354,7 +2618,6 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/rolldown/-/rolldown-1.0.1.tgz",
       "integrity": "sha512-X0KQHljNnEkWNqqiz9zJrGunh1B0HgOxLXvnFpCOcadzcy5qohZ3tqMEUg00vncoRovXuK3ZqCT9KnnKzoInFQ==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "@oxc-project/types": "=0.130.0",
@@ -2427,17 +2690,34 @@
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.2.1.tgz",
       "integrity": "sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA==",
-      "dev": true,
       "license": "BSD-3-Clause",
       "engines": {
         "node": ">=0.10.0"
       }
     },
+    "node_modules/tailwindcss": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-4.3.0.tgz",
+      "integrity": "sha512-y6nxMGB1nMW9R6k96e5gdIFzcfL/gTJRNaqGes1YvkLnPVXzWgbqFF2yLC0T8G774n24cx3Pe8XrKoniCOAH+Q==",
+      "license": "MIT"
+    },
+    "node_modules/tapable": {
+      "version": "2.3.3",
+      "resolved": "https://registry.npmjs.org/tapable/-/tapable-2.3.3.tgz",
+      "integrity": "sha512-uxc/zpqFg6x7C8vOE7lh6Lbda8eEL9zmVm/PLeTPBRhh1xCgdWaQ+J1CUieGpIfm2HdtsUpRv+HshiasBMcc6A==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/webpack"
+      }
+    },
     "node_modules/tinyglobby": {
       "version": "0.2.16",
       "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.16.tgz",
       "integrity": "sha512-pn99VhoACYR8nFHhxqix+uvsbXineAasWm5ojXoN8xEwK5Kd3/TrhNn1wByuD52UxWRLy8pu+kRMniEi6Eq9Zg==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "fdir": "^6.5.0",
@@ -2467,7 +2747,6 @@
       "version": "2.8.1",
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
       "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
-      "dev": true,
       "license": "0BSD",
       "optional": true
     },
@@ -2490,7 +2769,6 @@
       "integrity": "sha512-y2TvuxSZPDyQakkFRPZHKFm+KKVqIisdg9/CZwm9ftvKXLP8NRWj38/ODjNbr43SsoXqNuAisEf1GdCxqWcdBw==",
       "dev": true,
       "license": "Apache-2.0",
-      "peer": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
@@ -2527,7 +2805,7 @@
       "version": "7.16.0",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.16.0.tgz",
       "integrity": "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw==",
-      "dev": true,
+      "devOptional": true,
       "license": "MIT"
     },
     "node_modules/update-browserslist-db": {
@@ -2575,9 +2853,7 @@
       "version": "8.0.13",
       "resolved": "https://registry.npmjs.org/vite/-/vite-8.0.13.tgz",
       "integrity": "sha512-MFtjBYgzmSxmgA4RAfjIyXWpGe1oALnjgUTzzV7QLx/TKxCzjtMH6Fd9/eVK+5Fg1qNoz5VAwsmMs/NofrmJvw==",
-      "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "lightningcss": "^1.32.0",
         "picomatch": "^4.0.4",
@@ -2702,7 +2978,6 @@
       "integrity": "sha512-ytENFjIJFl2UwYglde2jchW2Hwm4GJFLDiSXWdTrJQBIN9Fcyp7n4DhxJEiWNAJMV1/BqWfW/kkg71UDcHJyTQ==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }
diff --git a/frontend/package.json b/frontend/package.json
index 70b0913..5161e44 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -10,8 +10,10 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@tailwindcss/vite": "^4.3.0",
     "react": "^19.2.6",
-    "react-dom": "^19.2.6"
+    "react-dom": "^19.2.6",
+    "tailwindcss": "^4.3.0"
   },
   "devDependencies": {
     "@eslint/js": "^10.0.1",
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 45f3316..6282708 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -1,7 +1,8 @@
-import { useState, useEffect } from 'react';
+import { useState, useEffect, useRef } from 'react';
 import { Toolbar } from './components/Toolbar';
 import { Sidebar } from './components/Sidebar';
 import { PDFViewer } from './viewer/PDFViewer';
+import type { PDFViewerRef } from './viewer/PDFViewer';
 import type { Annotation } from './viewer/AnnotationLayer';
 import { gatewayService } from './lib/gatewayService';
 import type { DocumentInfo } from './lib/gatewayService';
@@ -9,6 +10,7 @@ import { wasmLoader } from './lib/wasmLoader';
 import './App.css';
 
 function App() {
+  const viewerRef = useRef<PDFViewerRef>(null);
   const [documents, setDocuments] = useState<DocumentInfo[]>([]);
   const [selectedDocId, setSelectedDocId] = useState<string>('sample-doc-1');
   const [activeDoc, setActiveDoc] = useState<DocumentInfo | null>(null);
@@ -25,6 +27,35 @@ function App() {
   const [sidebarTab, setSidebarTab] = useState<'documents' | 'annotations' | 'outline'>('documents');
   const [isLoading, setIsLoading] = useState<boolean>(true);
 
+  // Search State
+  const [searchQuery, setSearchQuery] = useState('');
+  const [searchResultCount, setSearchResultCount] = useState(0);
+  const [searchCurrentMatch, setSearchCurrentMatch] = useState(0);
+
+  const handleSearch = (query: string) => {
+    setSearchQuery(query);
+    // Mock search results for Phase 0
+    if (query) {
+      setSearchResultCount(5);
+      setSearchCurrentMatch(0);
+    } else {
+      setSearchResultCount(0);
+      setSearchCurrentMatch(0);
+    }
+  };
+
+  const handleSearchNext = () => {
+    if (searchResultCount > 0) {
+      setSearchCurrentMatch((prev) => (prev + 1) % searchResultCount);
+    }
+  };
+
+  const handleSearchPrev = () => {
+    if (searchResultCount > 0) {
+      setSearchCurrentMatch((prev) => (prev - 1 + searchResultCount) % searchResultCount);
+    }
+  };
+
   // Check Gateway Health on mount
   useEffect(() => {
     const checkHealth = async () => {
@@ -131,6 +162,11 @@ function App() {
         totalPages={activeDoc?.totalPages || 1}
         onUploadStart={handleUploadStart}
         backendHealthy={backendHealthy}
+        onSearch={handleSearch}
+        searchResultCount={searchResultCount}
+        searchCurrentMatch={searchCurrentMatch}
+        onSearchNext={handleSearchNext}
+        onSearchPrev={handleSearchPrev}
       />
 
       <div className="flex-1 w-full flex overflow-hidden">
@@ -143,6 +179,9 @@ function App() {
           totalPages={activeDoc?.totalPages || 0}
           activeTab={sidebarTab}
           setActiveTab={setSidebarTab}
+          onNavigateToPage={(pageIndex) => {
+            viewerRef.current?.scrollToPage(pageIndex);
+          }}
         />
 
         {/* Main PDF Scroll Viewer Area */}
@@ -156,12 +195,14 @@ function App() {
           </div>
         ) : activeDoc ? (
           <PDFViewer
+            ref={viewerRef}
             documentId={activeDoc.id}
             totalPages={activeDoc.totalPages}
             zoom={zoom}
             rotation={rotation}
             activeTool={activeTool}
             annotations={annotations}
+            searchQuery={searchQuery}
             onAnnotationAdded={handleAnnotationAdded}
             onPageVisible={setCurrentPage}
           />
diff --git a/frontend/src/components/SearchBar.tsx b/frontend/src/components/SearchBar.tsx
new file mode 100644
index 0000000..04fb0e4
--- /dev/null
+++ b/frontend/src/components/SearchBar.tsx
@@ -0,0 +1,58 @@
+import React, { useState } from 'react';
+
+interface SearchBarProps {
+  onSearch: (query: string) => void;
+  resultCount: number;
+  currentMatch: number;
+  onNext: () => void;
+  onPrev: () => void;
+}
+
+export const SearchBar: React.FC<SearchBarProps> = ({
+  onSearch,
+  resultCount,
+  currentMatch,
+  onNext,
+  onPrev,
+}) => {
+  const [query, setQuery] = useState('');
+
+  const handleKeyDown = (e: React.KeyboardEvent<HTMLInputElement>) => {
+    if (e.key === 'Enter') {
+      onSearch(query);
+    }
+  };
+
+  return (
+    <div className="flex items-center bg-slate-900/40 border border-slate-700/70 rounded-xl px-3 py-1.5 gap-2 shadow-inner">
+      <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" className="text-slate-400" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
+        <path strokeLinecap="round" strokeLinejoin="round" d="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z" />
+      </svg>
+      <input
+        type="text"
+        placeholder="Search..."
+        value={query}
+        onChange={(e) => setQuery(e.target.value)}
+        onKeyDown={handleKeyDown}
+        className="bg-transparent border-none outline-none text-slate-100 text-sm w-32 placeholder-slate-500"
+      />
+      {query && (
+        <div className="flex items-center gap-1 text-xs text-slate-400 font-semibold border-l border-slate-700 pl-2">
+          <span>{resultCount > 0 ? `${currentMatch + 1}/${resultCount}` : '0/0'}</span>
+          <div className="flex flex-col gap-0.5 ml-1">
+            <button onClick={onPrev} className="hover:text-white" title="Previous match">
+              <svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={3}>
+                <path strokeLinecap="round" strokeLinejoin="round" d="M5 15l7-7 7 7" />
+              </svg>
+            </button>
+            <button onClick={onNext} className="hover:text-white" title="Next match">
+              <svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={3}>
+                <path strokeLinecap="round" strokeLinejoin="round" d="M19 9l-7 7-7-7" />
+              </svg>
+            </button>
+          </div>
+        </div>
+      )}
+    </div>
+  );
+};
diff --git a/frontend/src/components/Sidebar.tsx b/frontend/src/components/Sidebar.tsx
index 1a2e987..0dd77a8 100644
--- a/frontend/src/components/Sidebar.tsx
+++ b/frontend/src/components/Sidebar.tsx
@@ -1,6 +1,7 @@
 import React from 'react';
 import type { DocumentInfo } from '../lib/gatewayService';
 import type { Annotation } from '../viewer/AnnotationLayer';
+import { Thumbnail } from './Thumbnail';
 
 interface SidebarProps {
   documents: DocumentInfo[];
@@ -10,6 +11,7 @@ interface SidebarProps {
   totalPages: number;
   activeTab: 'documents' | 'annotations' | 'outline';
   setActiveTab: (tab: 'documents' | 'annotations' | 'outline') => void;
+  onNavigateToPage?: (pageIndex: number) => void;
 }
 
 export const Sidebar: React.FC<SidebarProps> = ({
@@ -20,6 +22,7 @@ export const Sidebar: React.FC<SidebarProps> = ({
   totalPages,
   activeTab,
   setActiveTab,
+  onNavigateToPage,
 }) => {
   const formatBytes = (bytes: number) => {
     if (bytes === 0) return '0 Bytes';
@@ -104,14 +107,12 @@ export const Sidebar: React.FC<SidebarProps> = ({
         {activeTab === 'outline' && (
           <div className="thumbnails-grid">
             {Array.from({ length: totalPages }).map((_, idx) => (
-              <div key={idx} className="thumbnail-card">
-                <div className="thumbnail-preview">
-                  <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" className="thumbnail-svg-icon" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
-                    <path strokeLinecap="round" strokeLinejoin="round" d="M4 16l4.586-4.586a2 2 0 012.828 0L16 16m-2-2l1.586-1.586a2 2 0 012.828 0L20 14m-6-6h.01M6 20h12a2 2 0 002-2V6a2 2 0 00-2-2H6a2 2 0 00-2 2v12a2 2 0 002 2z" />
-                  </svg>
-                  <span className="thumbnail-label">Page {idx + 1}</span>
-                </div>
-              </div>
+              <Thumbnail
+                key={idx}
+                documentId={selectedDocumentId}
+                pageIndex={idx}
+                onClick={() => onNavigateToPage?.(idx)}
+              />
             ))}
           </div>
         )}
diff --git a/frontend/src/components/Thumbnail.tsx b/frontend/src/components/Thumbnail.tsx
new file mode 100644
index 0000000..2827fc5
--- /dev/null
+++ b/frontend/src/components/Thumbnail.tsx
@@ -0,0 +1,75 @@
+import React, { useEffect, useState } from 'react';
+import { gatewayService } from '../lib/gatewayService';
+
+interface ThumbnailProps {
+  documentId: string;
+  pageIndex: number;
+  onClick: () => void;
+}
+
+export const Thumbnail: React.FC<ThumbnailProps> = ({
+  documentId,
+  pageIndex,
+  onClick,
+}) => {
+  const [imageUrl, setImageUrl] = useState<string | null>(null);
+  const [loading, setLoading] = useState(true);
+
+  useEffect(() => {
+    let active = true;
+    
+    const fetchThumbnail = async () => {
+      try {
+        setLoading(true);
+        // Request a lower resolution/zoom image for the thumbnail
+        const url = await gatewayService.renderPage({
+          documentId,
+          pageIndex,
+          zoom: 0.2, // Small zoom for thumbnail size
+          rotation: 0,
+        });
+        
+        if (active) {
+          setImageUrl(url);
+        }
+      } catch (err) {
+        console.error(`Failed to load thumbnail for page ${pageIndex}`, err);
+      } finally {
+        if (active) setLoading(false);
+      }
+    };
+
+    fetchThumbnail();
+
+    return () => {
+      active = false;
+    };
+  }, [documentId, pageIndex]);
+
+  return (
+    <div className="thumbnail-card" onClick={onClick}>
+      <div className="thumbnail-preview overflow-hidden bg-white hover:border-indigo-500 transition-colors">
+        {loading ? (
+          <div className="flex flex-col items-center justify-center h-full w-full bg-slate-900">
+             <div className="w-5 h-5 border-2 border-indigo-500 border-t-transparent rounded-full animate-spin mb-2" />
+             <span className="thumbnail-label">Loading...</span>
+          </div>
+        ) : imageUrl ? (
+          <img 
+            src={imageUrl} 
+            alt={`Page ${pageIndex + 1}`} 
+            className="w-full h-full object-cover"
+          />
+        ) : (
+          <div className="flex flex-col items-center justify-center h-full w-full">
+            <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" className="thumbnail-svg-icon" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
+              <path strokeLinecap="round" strokeLinejoin="round" d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z" />
+            </svg>
+            <span className="thumbnail-label text-rose-400">Error</span>
+          </div>
+        )}
+      </div>
+      <span className="thumbnail-label text-center mt-1">Page {pageIndex + 1}</span>
+    </div>
+  );
+};
diff --git a/frontend/src/components/Toolbar.tsx b/frontend/src/components/Toolbar.tsx
index 112deae..913594c 100644
--- a/frontend/src/components/Toolbar.tsx
+++ b/frontend/src/components/Toolbar.tsx
@@ -1,4 +1,5 @@
 import React from 'react';
+import { SearchBar } from './SearchBar';
 
 interface ToolbarProps {
   zoom: number;
@@ -13,6 +14,11 @@ interface ToolbarProps {
   backendHealthy: boolean | null;
   wasmEngineInfo?: string;
   wasmHasSkia?: boolean;
+  onSearch: (query: string) => void;
+  searchResultCount: number;
+  searchCurrentMatch: number;
+  onSearchNext: () => void;
+  onSearchPrev: () => void;
 }
 
 export const Toolbar: React.FC<ToolbarProps> = ({
@@ -26,8 +32,11 @@ export const Toolbar: React.FC<ToolbarProps> = ({
   totalPages,
   onUploadStart,
   backendHealthy,
-  wasmEngineInfo,
-  wasmHasSkia,
+  onSearch,
+  searchResultCount,
+  searchCurrentMatch,
+  onSearchNext,
+  onSearchPrev,
 }) => {
 
   const handleZoomPercentSelect = (e: React.ChangeEvent<HTMLSelectElement>) => {
@@ -125,6 +134,14 @@ export const Toolbar: React.FC<ToolbarProps> = ({
       {/* Right Tools (Active tool highlights, Upload) */}
       <div className="toolbar-section gap-3">
         <div className="tool-selector">
+          <button
+            onClick={() => onActiveToolChange('pan')}
+            className={`tool-btn ${activeTool === 'pan' ? 'active' : ''}`}
+            title="Pan (Drag)"
+          >
+            Pan
+          </button>
+          
           <button
             onClick={() => onActiveToolChange('select')}
             className={`tool-btn ${activeTool === 'select' ? 'active' : ''}`}
@@ -150,6 +167,15 @@ export const Toolbar: React.FC<ToolbarProps> = ({
           </button>
         </div>
 
+        {/* SEARCH BAR */}
+        <SearchBar 
+          onSearch={onSearch} 
+          resultCount={searchResultCount} 
+          currentMatch={searchCurrentMatch} 
+          onNext={onSearchNext} 
+          onPrev={onSearchPrev} 
+        />
+
         <label className="upload-btn">
           <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2.5}>
             <path strokeLinecap="round" strokeLinejoin="round" d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-8l-4-4m0 0L8 8m4-4v12" />
diff --git a/frontend/src/index.css b/frontend/src/index.css
index 10ba8c0..ce98c6f 100644
--- a/frontend/src/index.css
+++ b/frontend/src/index.css
@@ -1,4 +1,6 @@
 @import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;700&display=swap');
+@import "tailwindcss";
+
 
 :root {
   --sans: 'Outfit', system-ui, -apple-system, sans-serif;
diff --git a/frontend/src/lib/gatewayService.ts b/frontend/src/lib/gatewayService.ts
index 63e2e27..43878c4 100644
--- a/frontend/src/lib/gatewayService.ts
+++ b/frontend/src/lib/gatewayService.ts
@@ -42,13 +42,17 @@ class GatewayService {
   }
 
   async listDocuments(): Promise<DocumentInfo[]> {
-    const response = await fetch(`${this.baseUrl}/documents`);
-    if (response.status === 501) {
-      // Return mocked document list for Phase 0 scaffolding
+    try {
+      const response = await fetch(`${this.baseUrl}/documents`);
+      if (response.status === 501) {
+        return this.getMockDocuments();
+      }
+      if (!response.ok) throw new Error(`Failed to list documents: ${response.statusText}`);
+      return response.json();
+    } catch (err) {
+      // Fallback if backend is not running at all
       return this.getMockDocuments();
     }
-    if (!response.ok) throw new Error(`Failed to list documents: ${response.statusText}`);
-    return response.json();
   }
 
   async uploadDocument(file: File): Promise<DocumentInfo> {
@@ -81,14 +85,20 @@ class GatewayService {
   }
 
   async getDocument(id: string): Promise<DocumentInfo> {
-    const response = await fetch(`${this.baseUrl}/documents/${id}`);
-    if (response.status === 501) {
+    try {
+      const response = await fetch(`${this.baseUrl}/documents/${id}`);
+      if (response.status === 501) {
+        const mock = this.getMockDocuments().find(d => d.id === id);
+        if (!mock) throw new Error('Document not found');
+        return mock;
+      }
+      if (!response.ok) throw new Error(`Failed to fetch document metadata: ${response.statusText}`);
+      return response.json();
+    } catch (err) {
       const mock = this.getMockDocuments().find(d => d.id === id);
       if (!mock) throw new Error('Document not found');
       return mock;
     }
-    if (!response.ok) throw new Error(`Failed to fetch document metadata: ${response.statusText}`);
-    return response.json();
   }
 
   async deleteDocument(id: string): Promise<{ success: boolean }> {
@@ -103,24 +113,26 @@ class GatewayService {
   }
 
   async renderPage(params: RenderParams): Promise<string> {
-    // Returns object URL or base64 data for the rendered page
-    const query = new URLSearchParams({
-      page: params.pageIndex.toString(),
-      zoom: params.zoom.toString(),
-      rotation: params.rotation.toString(),
-    }).toString();
+    try {
+      const query = new URLSearchParams({
+        page: params.pageIndex.toString(),
+        zoom: params.zoom.toString(),
+        rotation: params.rotation.toString(),
+      }).toString();
 
-    const url = `${this.baseUrl}/render/${params.documentId}?${query}`;
-    
-    const response = await fetch(url);
-    if (response.status === 501) {
-      // Fallback: Generate a high-fidelity mock SVG/Canvas data URL for the page
+      const url = `${this.baseUrl}/render/${params.documentId}?${query}`;
+      
+      const response = await fetch(url);
+      if (response.status === 501) {
+        return this.generateMockPage(params.pageIndex);
+      }
+      
+      if (!response.ok) throw new Error(`Page render failed: ${response.statusText}`);
+      const blob = await response.blob();
+      return URL.createObjectURL(blob);
+    } catch (err) {
       return this.generateMockPage(params.pageIndex);
     }
-    
-    if (!response.ok) throw new Error(`Page render failed: ${response.statusText}`);
-    const blob = await response.blob();
-    return URL.createObjectURL(blob);
   }
 
   async applyEdits(documentId: string, operations: EditOperation[]): Promise<{ success: boolean; newDocumentId: string }> {
diff --git a/frontend/src/viewer/PDFViewer.tsx b/frontend/src/viewer/PDFViewer.tsx
index c326e8c..c9e9a28 100644
--- a/frontend/src/viewer/PDFViewer.tsx
+++ b/frontend/src/viewer/PDFViewer.tsx
@@ -4,6 +4,7 @@ import { SelectionLayer } from './SelectionLayer';
 import { AnnotationLayer } from './AnnotationLayer';
 import type { Annotation } from './AnnotationLayer';
 import { OverlayLayer } from './OverlayLayer';
+import { SearchOverlayLayer } from './SearchOverlayLayer';
 import type { Rect } from '../lib/coordinateMapping';
 import { gatewayService } from '../lib/gatewayService';
 
@@ -14,6 +15,7 @@ interface PDFViewerProps {
   rotation: number;
   activeTool: string;
   annotations: Annotation[];
+  searchQuery?: string;
   onAnnotationAdded?: (anno: Annotation) => void;
   onPageVisible?: (pageIndex: number) => void;
 }
@@ -27,16 +29,21 @@ interface PageLayout {
 
 const generateUniqueId = () => `anno_${Math.random().toString(36).substring(2, 11)}`;
 
-export const PDFViewer: React.FC<PDFViewerProps> = ({
+export interface PDFViewerRef {
+  scrollToPage: (pageIndex: number) => void;
+}
+
+export const PDFViewer = React.forwardRef<PDFViewerRef, PDFViewerProps>(({
   documentId,
   totalPages,
   zoom,
   rotation,
   activeTool,
   annotations,
+  searchQuery,
   onAnnotationAdded,
   onPageVisible,
-}) => {
+}, ref) => {
   const containerRef = useRef<HTMLDivElement | null>(null);
   const [scrollPosition, setScrollPosition] = useState({ scrollLeft: 0, scrollTop: 0 });
   const [renderedPages, setRenderedPages] = useState<string[]>([]);
@@ -85,6 +92,14 @@ export const PDFViewer: React.FC<PDFViewerProps> = ({
     });
   };
 
+  React.useImperativeHandle(ref, () => ({
+    scrollToPage: (pageIndex: number) => {
+      if (containerRef.current && pageLayouts[pageIndex]) {
+        containerRef.current.scrollTop = pageLayouts[pageIndex].top;
+      }
+    }
+  }));
+
   useEffect(() => {
     const updateSize = () => {
       if (containerRef.current) {
@@ -190,11 +205,45 @@ export const PDFViewer: React.FC<PDFViewerProps> = ({
     }
   };
 
+  const [isPanning, setIsPanning] = useState(false);
+  const [panStart, setPanStart] = useState({ x: 0, y: 0, scrollLeft: 0, scrollTop: 0 });
+
+  const handleMouseDown = (e: React.MouseEvent) => {
+    if (activeTool === 'pan' && containerRef.current) {
+      setIsPanning(true);
+      setPanStart({
+        x: e.clientX,
+        y: e.clientY,
+        scrollLeft: containerRef.current.scrollLeft,
+        scrollTop: containerRef.current.scrollTop,
+      });
+    }
+  };
+
+  const handleMouseMove = (e: React.MouseEvent) => {
+    if (isPanning && containerRef.current) {
+      const dx = e.clientX - panStart.x;
+      const dy = e.clientY - panStart.y;
+      containerRef.current.scrollLeft = panStart.scrollLeft - dx;
+      containerRef.current.scrollTop = panStart.scrollTop - dy;
+    }
+  };
+
+  const handleMouseUp = () => {
+    if (isPanning) {
+      setIsPanning(false);
+    }
+  };
+
   return (
     <div
       ref={containerRef}
       onScroll={handleScroll}
-      className="viewer-viewport"
+      onMouseDown={handleMouseDown}
+      onMouseMove={handleMouseMove}
+      onMouseUp={handleMouseUp}
+      onMouseLeave={handleMouseUp}
+      className={`viewer-viewport ${activeTool === 'pan' ? (isPanning ? 'cursor-grabbing' : 'cursor-grab') : ''}`}
     >
       <div
         className="viewer-content-container"
@@ -250,6 +299,15 @@ export const PDFViewer: React.FC<PDFViewerProps> = ({
                     height={page.height}
                     activeTool={activeTool}
                   />
+
+                  {/* Search highlights overlay */}
+                  <SearchOverlayLayer
+                    pageIndex={page.index}
+                    width={page.width}
+                    height={page.height}
+                    zoom={zoom}
+                    searchQuery={searchQuery || ''}
+                  />
                 </>
               ) : (
                 <div className="page-loading-state">
@@ -263,4 +321,4 @@ export const PDFViewer: React.FC<PDFViewerProps> = ({
       </div>
     </div>
   );
-};
+});
diff --git a/frontend/src/viewer/SearchOverlayLayer.tsx b/frontend/src/viewer/SearchOverlayLayer.tsx
new file mode 100644
index 0000000..5500840
--- /dev/null
+++ b/frontend/src/viewer/SearchOverlayLayer.tsx
@@ -0,0 +1,61 @@
+import React from 'react';
+
+interface SearchOverlayLayerProps {
+  pageIndex: number;
+  width: number;
+  height: number;
+  zoom: number;
+  searchQuery: string;
+}
+
+export const SearchOverlayLayer: React.FC<SearchOverlayLayerProps> = ({
+  pageIndex,
+  width,
+  height,
+  zoom,
+  searchQuery,
+}) => {
+  if (!searchQuery) return null;
+
+  // Mock some search results based on the query for Phase 0/1
+  // We'll just generate deterministic-looking boxes so it looks like it found something
+  const mockResults = [];
+  const hash = searchQuery.length + pageIndex;
+  
+  if (hash % 3 !== 0) {
+    mockResults.push({
+      x: 100 * zoom,
+      y: (150 + hash * 10) * zoom,
+      width: 120 * zoom,
+      height: 18 * zoom,
+    });
+  }
+  if (hash % 2 === 0) {
+    mockResults.push({
+      x: 300 * zoom,
+      y: (250 + hash * 5) * zoom,
+      width: 80 * zoom,
+      height: 18 * zoom,
+    });
+  }
+
+  return (
+    <div
+      className="absolute top-0 left-0 pointer-events-none z-20"
+      style={{ width: `${width}px`, height: `${height}px` }}
+    >
+      {mockResults.map((rect, idx) => (
+        <div
+          key={idx}
+          className="absolute bg-yellow-400/40 border border-yellow-500/60 rounded-sm"
+          style={{
+            left: `${rect.x}px`,
+            top: `${rect.y}px`,
+            width: `${rect.width}px`,
+            height: `${rect.height}px`,
+          }}
+        />
+      ))}
+    </div>
+  );
+};
diff --git a/frontend/vite.config.ts b/frontend/vite.config.ts
index 8b0f57b..c4069b7 100644
--- a/frontend/vite.config.ts
+++ b/frontend/vite.config.ts
@@ -1,7 +1,8 @@
 import { defineConfig } from 'vite'
 import react from '@vitejs/plugin-react'
+import tailwindcss from '@tailwindcss/vite'
 
 // https://vite.dev/config/
 export default defineConfig({
-  plugins: [react()],
+  plugins: [react(), tailwindcss()],
 })